BCC-Examples: Fix returns in disksnoop.py

Add comprehensive Sphinx documentation with MyST-Parser

.gitattributes

@@ -1 +1,3 @@
 tests/c-form/vmlinux.h linguist-vendored
+examples/ linguist-vendored
+BCC-Examples/ linguist-vendored

.github/workflows/format.yml

@@ -12,7 +12,7 @@ jobs:
     name: Format
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - uses: actions/setup-python@v6
       with:
         python-version: "3.x"

.github/workflows/python-publish.yml

@@ -20,7 +20,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - uses: actions/setup-python@v6
         with:
@@ -33,7 +33,7 @@ jobs:
           python -m build
 
       - name: Upload distributions
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         with:
           name: release-dists
           path: dist/
@@ -59,7 +59,7 @@ jobs:
 
     steps:
       - name: Retrieve release distributions
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v7
         with:
           name: release-dists
           path: dist/

.gitignore

@@ -10,3 +10,7 @@ __pycache__/
 vmlinux.py
 ~*
 vmlinux.h
+
+# Documentation build artifacts
+docs/_build/
+docs/_templates/

.readthedocs.yaml

@@ -0,0 +1,21 @@
+# Read the Docs configuration file for Sphinx
+# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
+
+version: 2
+
+# Set the OS, Python version, and other tools you might need
+build:
+  os: ubuntu-24.04
+  tools:
+    python: "3.12"
+
+# Build documentation in the "docs/" directory with Sphinx
+sphinx:
+  configuration: docs/conf.py
+
+# Optionally, but recommended, declare the Python requirements
+python:
+  install:
+    - requirements: docs/requirements.txt
+    - method: pip
+      path: .

BCC-Examples/README.md

@@ -0,0 +1,31 @@
+## BCC examples ported to PythonBPF
+
+This folder contains examples of BCC tutorial examples that have been ported to use **PythonBPF**.
+
+## Requirements
+- install `pythonbpf` and `pylibbpf` using pip.
+- You will also need `matplotlib` for vfsreadlat.py example.
+- You will also need `rich` for vfsreadlat_rich.py example.
+- You will also need `plotly` and `dash` for vfsreadlat_plotly.py example.
+- All of these are added to `requirements.txt` file. You can install them using the following command:
+  ```bash
+  pip install -r requirements.txt
+  ```
+
+## Usage
+- You'll need root privileges to run these examples. If you are using a virtualenv, use the following command to run the scripts:
+  ```bash
+  sudo <path_to_virtualenv>/bin/python3 <script_name>.py
+  ```
+- For the disksnoop and container-monitor examples, you need to generate the vmlinux.py file first. Follow the instructions in the [main README](https://github.com/pythonbpf/Python-BPF/tree/master?tab=readme-ov-file#first-generate-the-vmlinuxpy-file-for-your-kernel) to generate the vmlinux.py file.
+- For vfsreadlat_plotly.py, run the following command to start the Dash server:
+  ```bash
+  sudo <path_to_virtualenv>/bin/python3 vfsreadlat_plotly/bpf_program.py
+  ```
+  Then open your web browser and navigate to the given URL.
+- For container-monitor, you need to first copy the vmlinux.py to `container-monitor/` directory.
+  Then run the following command to run the example:
+  ```bash
+    cp vmlinux.py container-monitor/
+    sudo <path_to_virtualenv>/bin/python3 container-monitor/container_monitor.py
+  ```

BCC-Examples/disksnoop.ipynb

@@ -0,0 +1,122 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "c3520e58-e50f-4bc1-8f9d-a6fecbf6e9f0",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from vmlinux import struct_request, struct_pt_regs\n",
+    "from pythonbpf import bpf, section, bpfglobal, map, BPF\n",
+    "from pythonbpf.helper import ktime\n",
+    "from pythonbpf.maps import HashMap\n",
+    "from ctypes import c_int64, c_uint64, c_int32\n",
+    "\n",
+    "REQ_WRITE = 1\n",
+    "\n",
+    "\n",
+    "@bpf\n",
+    "@map\n",
+    "def start() -> HashMap:\n",
+    "    return HashMap(key=c_uint64, value=c_uint64, max_entries=10240)\n",
+    "\n",
+    "\n",
+    "@bpf\n",
+    "@section(\"kprobe/blk_mq_end_request\")\n",
+    "def trace_completion(ctx: struct_pt_regs) -> c_int64:\n",
+    "    # Get request pointer from first argument\n",
+    "    req_ptr = ctx.di\n",
+    "    req = struct_request(ctx.di)\n",
+    "    # Print: data_len, cmd_flags, latency_us\n",
+    "    data_len = req.__data_len\n",
+    "    cmd_flags = req.cmd_flags\n",
+    "    # Lookup start timestamp\n",
+    "    req_tsp = start.lookup(req_ptr)\n",
+    "    if req_tsp:\n",
+    "        # Calculate delta in nanoseconds\n",
+    "        delta = ktime() - req_tsp\n",
+    "\n",
+    "        # Convert to microseconds for printing\n",
+    "        delta_us = delta // 1000\n",
+    "\n",
+    "        print(f\"{data_len} {cmd_flags:x} {delta_us}\\n\")\n",
+    "\n",
+    "        # Delete the entry\n",
+    "        start.delete(req_ptr)\n",
+    "\n",
+    "    return c_int64(0)\n",
+    "\n",
+    "\n",
+    "@bpf\n",
+    "@section(\"kprobe/blk_mq_start_request\")\n",
+    "def trace_start(ctx1: struct_pt_regs) -> c_int32:\n",
+    "    req = ctx1.di\n",
+    "    ts = ktime()\n",
+    "    start.update(req, ts)\n",
+    "    return c_int32(0)\n",
+    "\n",
+    "\n",
+    "@bpf\n",
+    "@bpfglobal\n",
+    "def LICENSE() -> str:\n",
+    "    return \"GPL\"\n",
+    "\n",
+    "\n",
+    "b = BPF()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "97040f73-98e0-4993-94c6-125d1b42d931",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "b.load()\n",
+    "b.attach_all()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "b1bd4f51-fa25-42e1-877c-e48a2605189f",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from pythonbpf import trace_pipe"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "96b4b59b-b0db-4952-9534-7a714f685089",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "trace_pipe()"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3 (ipykernel)",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.12.3"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}

BCC-Examples/disksnoop.py

@@ -0,0 +1,48 @@
+from ctypes import c_int32, c_int64, c_uint64
+
+from vmlinux import struct_pt_regs, struct_request
+
+from pythonbpf import bpf, bpfglobal, compile, map, section
+from pythonbpf.helper import ktime
+from pythonbpf.maps import HashMap
+
+
+@bpf
+@map
+def start() -> HashMap:
+    return HashMap(key=c_uint64, value=c_uint64, max_entries=10240)
+
+
+@bpf
+@section("kprobe/blk_mq_end_request")
+def trace_completion(ctx: struct_pt_regs) -> c_int64:
+    req_ptr = ctx.di
+    req = struct_request(ctx.di)
+    data_len = req.__data_len
+    cmd_flags = req.cmd_flags
+    req_tsp = start.lookup(req_ptr)
+    if req_tsp:
+        delta = ktime() - req_tsp
+        delta_us = delta // 1000
+        print(f"{data_len} {cmd_flags:x} {delta_us}\n")
+        start.delete(req_ptr)
+
+    return 0  # type: ignore [return-value]
+
+
+@bpf
+@section("kprobe/blk_mq_start_request")
+def trace_start(ctx1: struct_pt_regs) -> c_int32:
+    req = ctx1.di
+    ts = ktime()
+    start.update(req, ts)
+    return 0  # type: ignore [return-value]
+
+
+@bpf
+@bpfglobal
+def LICENSE() -> str:
+    return "GPL"
+
+
+compile()

BCC-Examples/hello_fields.ipynb

@@ -0,0 +1,83 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "28cf2e27-41e2-461c-a39c-147417141a4e",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from pythonbpf import bpf, section, bpfglobal, BPF, trace_fields\n",
+    "from ctypes import c_void_p, c_int64"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "133190e5-5a99-4585-b6e1-91224ed973c2",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "@bpf\n",
+    "@section(\"tracepoint/syscalls/sys_enter_clone\")\n",
+    "def hello_world(ctx: c_void_p) -> c_int64:\n",
+    "    print(\"Hello, World!\")\n",
+    "    return 0\n",
+    "\n",
+    "\n",
+    "@bpf\n",
+    "@bpfglobal\n",
+    "def LICENSE() -> str:\n",
+    "    return \"GPL\"\n",
+    "\n",
+    "\n",
+    "# Compile and load\n",
+    "b = BPF()\n",
+    "b.load()\n",
+    "b.attach_all()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "d3934efb-4043-4545-ae4c-c50ec40a24fd",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# header\n",
+    "print(f\"{'TIME(s)':<18} {'COMM':<16} {'PID':<6} {'MESSAGE'}\")\n",
+    "\n",
+    "# format output\n",
+    "while True:\n",
+    "    try:\n",
+    "        (task, pid, cpu, flags, ts, msg) = trace_fields()\n",
+    "    except ValueError:\n",
+    "        continue\n",
+    "    except KeyboardInterrupt:\n",
+    "        exit()\n",
+    "    print(f\"{ts:<18} {task:<16} {pid:<6} {msg}\")"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3 (ipykernel)",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.13.3"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}

BCC-Examples/hello_perf_output.ipynb

@@ -0,0 +1,110 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "79b74928-f4b4-4320-96e3-d973997de2f4",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from pythonbpf import bpf, map, struct, section, bpfglobal, BPF\n",
+    "from pythonbpf.helper import ktime, pid, comm\n",
+    "from pythonbpf.maps import PerfEventArray\n",
+    "from ctypes import c_void_p, c_int64"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "5bdb0329-ae2d-45e8-808e-5ed5b1374204",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "@bpf\n",
+    "@struct\n",
+    "class data_t:\n",
+    "    pid: c_int64\n",
+    "    ts: c_int64\n",
+    "    comm: str(16)\n",
+    "\n",
+    "\n",
+    "@bpf\n",
+    "@map\n",
+    "def events() -> PerfEventArray:\n",
+    "    return PerfEventArray(key_size=c_int64, value_size=c_int64)\n",
+    "\n",
+    "\n",
+    "@bpf\n",
+    "@section(\"tracepoint/syscalls/sys_enter_clone\")\n",
+    "def hello(ctx: c_void_p) -> c_int64:\n",
+    "    dataobj = data_t()\n",
+    "    dataobj.pid, dataobj.ts = pid(), ktime()\n",
+    "    comm(dataobj.comm)\n",
+    "    events.output(dataobj)\n",
+    "    return 0\n",
+    "\n",
+    "\n",
+    "@bpf\n",
+    "@bpfglobal\n",
+    "def LICENSE() -> str:\n",
+    "    return \"GPL\"\n",
+    "\n",
+    "\n",
+    "# Compile and load\n",
+    "b = BPF()\n",
+    "b.load()\n",
+    "b.attach_all()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "4bcc7d57-6cc4-48a3-bbd2-42ad6263afdf",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "start = 0\n",
+    "\n",
+    "\n",
+    "def callback(cpu, event):\n",
+    "    global start\n",
+    "    if start == 0:\n",
+    "        start = event.ts\n",
+    "    ts = (event.ts - start) / 1e9\n",
+    "    print(f\"[CPU {cpu}] PID: {event.pid}, TS: {ts}, COMM: {event.comm.decode()}\")\n",
+    "\n",
+    "\n",
+    "perf = b[\"events\"].open_perf_buffer(callback, struct_name=\"data_t\")\n",
+    "print(\"Starting to poll... (Ctrl+C to stop)\")\n",
+    "print(\"Try running: fork() or clone() system calls to trigger events\")\n",
+    "\n",
+    "try:\n",
+    "    while True:\n",
+    "        b[\"events\"].poll(1000)\n",
+    "except KeyboardInterrupt:\n",
+    "    print(\"Stopping...\")"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3 (ipykernel)",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.13.3"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}

BCC-Examples/hello_world.ipynb

@@ -0,0 +1,116 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": 9,
+   "id": "7d5d3cfb-39ba-4516-9856-b3bed47a0cef",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from pythonbpf import bpf, section, bpfglobal, BPF, trace_pipe\n",
+    "from ctypes import c_void_p, c_int64"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 10,
+   "id": "cf1c87aa-e173-4156-8f2d-762225bc6d19",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "@bpf\n",
+    "@section(\"tracepoint/syscalls/sys_enter_clone\")\n",
+    "def hello_world(ctx: c_void_p) -> c_int64:\n",
+    "    print(\"Hello, World!\")\n",
+    "    return 0\n",
+    "\n",
+    "\n",
+    "@bpf\n",
+    "@bpfglobal\n",
+    "def LICENSE() -> str:\n",
+    "    return \"GPL\"\n",
+    "\n",
+    "\n",
+    "b = BPF()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "bd81383d-f75a-4269-8451-3d985d85b124",
+   "metadata": {
+    "scrolled": true
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "      Cache2 I/O-4716    [003] ...21  8218.000492: bpf_trace_printk: count: 11 with 4716\n",
+      "\n",
+      "      Cache2 I/O-4716    [003] ...21  8218.000499: bpf_trace_printk: Hello, World!\n",
+      "\n",
+      "   WebExtensions-5168    [002] ...21  8219.320392: bpf_trace_printk: count: 13 with 5168\n",
+      "\n",
+      "   WebExtensions-5168    [002] ...21  8219.320399: bpf_trace_printk: Hello, World!\n",
+      "\n",
+      "          python-21155   [001] ...21  8220.933716: bpf_trace_printk: count: 5 with 21155\n",
+      "\n",
+      "          python-21155   [001] ...21  8220.933721: bpf_trace_printk: Hello, World!\n",
+      "\n",
+      "          python-21155   [002] ...21  8221.341290: bpf_trace_printk: count: 6 with 21155\n",
+      "\n",
+      "          python-21155   [002] ...21  8221.341295: bpf_trace_printk: Hello, World!\n",
+      "\n",
+      " Isolated Web Co-5462    [000] ...21  8223.095033: bpf_trace_printk: count: 7 with 5462\n",
+      "\n",
+      " Isolated Web Co-5462    [000] ...21  8223.095043: bpf_trace_printk: Hello, World!\n",
+      "\n",
+      "         firefox-4542    [000] ...21  8227.760067: bpf_trace_printk: count: 8 with 4542\n",
+      "\n",
+      "         firefox-4542    [000] ...21  8227.760080: bpf_trace_printk: Hello, World!\n",
+      "\n",
+      " Isolated Web Co-12404   [003] ...21  8227.917086: bpf_trace_printk: count: 7 with 12404\n",
+      "\n",
+      " Isolated Web Co-12404   [003] ...21  8227.917095: bpf_trace_printk: Hello, World!\n",
+      "\n"
+     ]
+    }
+   ],
+   "source": [
+    "b.load()\n",
+    "b.attach_all()\n",
+    "trace_pipe()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "01e1f25b-decc-425b-a1aa-a5e701082574",
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3 (ipykernel)",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.13.3"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}

BCC-Examples/requirements.txt

@@ -0,0 +1,9 @@
+# =============================================================================
+# Requirements for PythonBPF BCC-Examples
+# =============================================================================
+
+dash
+matplotlib
+numpy
+plotly
+rich

BCC-Examples/sync_count.ipynb

@@ -0,0 +1,107 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "dcab010c-f5e9-446f-9f9f-056cc794ad14",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from pythonbpf import bpf, map, section, bpfglobal, BPF, trace_fields\n",
+    "from pythonbpf.helper import ktime\n",
+    "from pythonbpf.maps import HashMap\n",
+    "\n",
+    "from ctypes import c_void_p, c_int64"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "720797e8-9c81-4af6-a385-80f1ec4c0f15",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "@bpf\n",
+    "@map\n",
+    "def last() -> HashMap:\n",
+    "    return HashMap(key=c_int64, value=c_int64, max_entries=2)\n",
+    "\n",
+    "\n",
+    "@bpf\n",
+    "@section(\"tracepoint/syscalls/sys_enter_sync\")\n",
+    "def do_trace(ctx: c_void_p) -> c_int64:\n",
+    "    ts_key, cnt_key = 0, 1\n",
+    "    tsp, cntp = last.lookup(ts_key), last.lookup(cnt_key)\n",
+    "    if not cntp:\n",
+    "        last.update(cnt_key, 0)\n",
+    "        cntp = last.lookup(cnt_key)\n",
+    "    if tsp:\n",
+    "        delta = ktime() - tsp\n",
+    "        if delta < 1000000000:\n",
+    "            time_ms = delta // 1000000\n",
+    "            print(f\"{time_ms} {cntp}\")\n",
+    "        last.delete(ts_key)\n",
+    "    else:\n",
+    "        last.update(ts_key, ktime())\n",
+    "    last.update(cnt_key, cntp + 1)\n",
+    "    return 0\n",
+    "\n",
+    "\n",
+    "@bpf\n",
+    "@bpfglobal\n",
+    "def LICENSE() -> str:\n",
+    "    return \"GPL\"\n",
+    "\n",
+    "\n",
+    "# Compile and load\n",
+    "b = BPF()\n",
+    "b.load()\n",
+    "b.attach_all()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "78a8b82c-7c5f-43c1-9de1-cd982a0f345b",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "print(\"Tracing for quick sync's... Ctrl-C to end\")\n",
+    "\n",
+    "# format output\n",
+    "start = 0\n",
+    "while True:\n",
+    "    try:\n",
+    "        task, pid, cpu, flags, ts, msg = trace_fields()\n",
+    "        if start == 0:\n",
+    "            start = ts\n",
+    "        ts -= start\n",
+    "        ms, cnt = msg.split()\n",
+    "        print(f\"At time {ts} s: Multiple syncs detected, last {ms} ms ago. Count {cnt}\")\n",
+    "    except KeyboardInterrupt:\n",
+    "        exit()"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3 (ipykernel)",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.13.3"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}

BCC-Examples/sync_perf_output.ipynb

@@ -0,0 +1,134 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "b0d1ab05-0c1f-4578-9c1b-568202b95a5c",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from pythonbpf import bpf, map, struct, section, bpfglobal, BPF\n",
+    "from pythonbpf.helper import ktime\n",
+    "from pythonbpf.maps import HashMap, PerfEventArray\n",
+    "from ctypes import c_void_p, c_int64"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "85e50d0a-f9d8-468f-8e03-f5f7128f05d8",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "@bpf\n",
+    "@struct\n",
+    "class data_t:\n",
+    "    ts: c_int64\n",
+    "    ms: c_int64\n",
+    "\n",
+    "\n",
+    "@bpf\n",
+    "@map\n",
+    "def events() -> PerfEventArray:\n",
+    "    return PerfEventArray(key_size=c_int64, value_size=c_int64)\n",
+    "\n",
+    "\n",
+    "@bpf\n",
+    "@map\n",
+    "def last() -> HashMap:\n",
+    "    return HashMap(key=c_int64, value=c_int64, max_entries=1)\n",
+    "\n",
+    "\n",
+    "@bpf\n",
+    "@section(\"tracepoint/syscalls/sys_enter_sync\")\n",
+    "def do_trace(ctx: c_void_p) -> c_int64:\n",
+    "    dat, dat.ts, key = data_t(), ktime(), 0\n",
+    "    tsp = last.lookup(key)\n",
+    "    if tsp:\n",
+    "        delta = ktime() - tsp\n",
+    "        if delta < 1000000000:\n",
+    "            dat.ms = delta // 1000000\n",
+    "            events.output(dat)\n",
+    "        last.delete(key)\n",
+    "    else:\n",
+    "        last.update(key, ktime())\n",
+    "    return 0\n",
+    "\n",
+    "\n",
+    "@bpf\n",
+    "@bpfglobal\n",
+    "def LICENSE() -> str:\n",
+    "    return \"GPL\"\n",
+    "\n",
+    "\n",
+    "# Compile and load\n",
+    "b = BPF()\n",
+    "b.load()\n",
+    "b.attach_all()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "40bb1107-369f-4be7-9f10-37201900c16b",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "print(\"Tracing for quick sync's... Ctrl-C to end\")\n",
+    "\n",
+    "# format output\n",
+    "start = 0\n",
+    "\n",
+    "\n",
+    "def callback(cpu, event):\n",
+    "    global start\n",
+    "    if start == 0:\n",
+    "        start = event.ts\n",
+    "    event.ts -= start\n",
+    "    print(\n",
+    "        f\"At time {event.ts / 1e9} s: Multiple sync detected, Last sync: {event.ms} ms ago\"\n",
+    "    )\n",
+    "\n",
+    "\n",
+    "perf = b[\"events\"].open_perf_buffer(callback, struct_name=\"data_t\")\n",
+    "print(\"Starting to poll... (Ctrl+C to stop)\")\n",
+    "print(\"Try running: fork() or clone() system calls to trigger events\")\n",
+    "\n",
+    "try:\n",
+    "    while True:\n",
+    "        b[\"events\"].poll(1000)\n",
+    "except KeyboardInterrupt:\n",
+    "    print(\"Stopping...\")"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "94a588d9-3a40-437c-a35b-fc40410f3eb7",
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3 (ipykernel)",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.13.3"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}

BCC-Examples/sync_perf_output.py

@@ -1,7 +1,6 @@
 from pythonbpf import bpf, map, struct, section, bpfglobal, BPF
 from pythonbpf.helper import ktime
-from pythonbpf.maps import HashMap
-from pythonbpf.maps import PerfEventArray
+from pythonbpf.maps import HashMap, PerfEventArray
 from ctypes import c_void_p, c_int64
 
 
@@ -69,8 +68,6 @@ def callback(cpu, event):
 
 perf = b["events"].open_perf_buffer(callback, struct_name="data_t")
 print("Starting to poll... (Ctrl+C to stop)")
-print("Try running: fork() or clone() system calls to trigger events")
-
 try:
     while True:
         b["events"].poll(1000)

BCC-Examples/sync_timing.ipynb

@@ -0,0 +1,102 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "bfe01ceb-2f27-41b3-b3ba-50ec65cfddda",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from pythonbpf import bpf, map, section, bpfglobal, BPF, trace_fields\n",
+    "from pythonbpf.helper import ktime\n",
+    "from pythonbpf.maps import HashMap\n",
+    "\n",
+    "from ctypes import c_void_p, c_int64"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "ddb115f4-20a7-43bc-bb5b-ccbfd6031fc2",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "@bpf\n",
+    "@map\n",
+    "def last() -> HashMap:\n",
+    "    return HashMap(key=c_int64, value=c_int64, max_entries=1)\n",
+    "\n",
+    "\n",
+    "@bpf\n",
+    "@section(\"tracepoint/syscalls/sys_enter_sync\")\n",
+    "def do_trace(ctx: c_void_p) -> c_int64:\n",
+    "    key = 0\n",
+    "    tsp = last.lookup(key)\n",
+    "    if tsp:\n",
+    "        delta = ktime() - tsp\n",
+    "        if delta < 1000000000:\n",
+    "            time_ms = delta // 1000000\n",
+    "            print(f\"{time_ms}\")\n",
+    "        last.delete(key)\n",
+    "    else:\n",
+    "        last.update(key, ktime())\n",
+    "    return 0\n",
+    "\n",
+    "\n",
+    "@bpf\n",
+    "@bpfglobal\n",
+    "def LICENSE() -> str:\n",
+    "    return \"GPL\"\n",
+    "\n",
+    "\n",
+    "# Compile and load\n",
+    "b = BPF()\n",
+    "b.load()\n",
+    "b.attach_all()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "e4f46574-9fd8-46e7-9c7b-27a36d07f200",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "print(\"Tracing for quick sync's... Ctrl-C to end\")\n",
+    "\n",
+    "# format output\n",
+    "start = 0\n",
+    "while True:\n",
+    "    try:\n",
+    "        task, pid, cpu, flags, ts, ms = trace_fields()\n",
+    "        if start == 0:\n",
+    "            start = ts\n",
+    "        ts -= start\n",
+    "        print(f\"At time {ts} s: Multiple syncs detected, last {ms} ms ago\")\n",
+    "    except KeyboardInterrupt:\n",
+    "        exit()"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3 (ipykernel)",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.13.3"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}

BCC-Examples/sys_sync.ipynb

@@ -0,0 +1,73 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "bb49598f-b9cc-4ea8-8391-923cad513711",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from pythonbpf import bpf, section, bpfglobal, BPF, trace_pipe\n",
+    "from ctypes import c_void_p, c_int64"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "5da237b0-1c7d-4ec5-8c24-696b1c1d97fa",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "@bpf\n",
+    "@section(\"tracepoint/syscalls/sys_enter_sync\")\n",
+    "def hello_world(ctx: c_void_p) -> c_int64:\n",
+    "    print(\"sys_sync() called\")\n",
+    "    return 0\n",
+    "\n",
+    "\n",
+    "@bpf\n",
+    "@bpfglobal\n",
+    "def LICENSE() -> str:\n",
+    "    return \"GPL\"\n",
+    "\n",
+    "\n",
+    "# Compile and load\n",
+    "b = BPF()\n",
+    "b.load()\n",
+    "b.attach_all()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "e4c218ac-fe47-4fd1-a27b-c07e02f3cd05",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "print(\"Tracing sys_sync()... Ctrl-C to end.\")\n",
+    "trace_pipe()"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3 (ipykernel)",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.13.3"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}

README.md

@@ -19,6 +19,8 @@
   <a href="https://pepy.tech/project/pythonbpf"><img src="https://pepy.tech/badge/pythonbpf" alt="Downloads"></a>
   <!-- Build & CI -->
   <a href="https://github.com/pythonbpf/python-bpf/actions"><img src="https://github.com/pythonbpf/python-bpf/actions/workflows/python-publish.yml/badge.svg" alt="Build Status"></a>
+  <!-- Documentation -->
+  <a href="https://python-bpf.readthedocs.io/en/latest/?badge=latest"><img src="https://readthedocs.org/projects/python-bpf/badge/?version=latest" alt="Documentation Status"></a>
   <!-- Meta -->
   <a href="https://github.com/pythonbpf/python-bpf/blob/main/LICENSE"><img src="https://img.shields.io/github/license/pythonbpf/python-bpf" alt="License"></a>
 </p>
@@ -44,6 +46,7 @@ Python-BPF is an LLVM IR generator for eBPF programs written in Python. It uses
 
 Dependencies:
 
+* `bpftool`
 * `clang`
 * Python ≥ 3.8
 
@@ -55,6 +58,38 @@ pip install pythonbpf pylibbpf
 
 ---
 
+## Try It Out!
+
+#### First, generate the vmlinux.py file for your kernel:
+- Install the required dependencies:
+- On Ubuntu:
+```bash
+sudo apt-get install bpftool clang
+pip install pythonbpf pylibbpf ctypeslib2
+```
+- Generate the `vmlinux.py` using:
+```bash
+sudo tools/vmlinux-gen.py
+```
+- Copy this file to `BCC-Examples/`
+
+#### Next, install requirements for BCC-Examples:
+- These requirements are only required for the python notebooks, vfsreadlat and container-monitor examples.
+```bash
+pip install -r BCC-Examples/requirements.txt
+```
+- Now, follow the instructions in the [BCC-Examples/README.md](https://github.com/pythonbpf/Python-BPF/blob/master/BCC-Examples/README.md) to run the examples.
+
+
+#### To spin up jupyter notebook examples:
+- Run and follow the instructions on screen
+```bash
+curl -s https://raw.githubusercontent.com/pythonbpf/Python-BPF/refs/heads/master/tools/setup.sh | sudo bash
+```
+- Check the jupyter server on the web browser and run the notebooks in the `BCC-Examples/` folder.
+
+---
+
 ## Example Usage
 
 ```python
@@ -82,16 +117,15 @@ def hist() -> HashMap:
 @section("tracepoint/syscalls/sys_enter_clone")
 def hello(ctx: c_void_p) -> c_int64:
     process_id = pid()
-    one = 1
     prev = hist.lookup(process_id)
     if prev:
         previous_value = prev + 1
         print(f"count: {previous_value} with {process_id}")
         hist.update(process_id, previous_value)
-        return c_int64(0)
+        return 0
     else:
-        hist.update(process_id, one)
-    return c_int64(0)
+        hist.update(process_id, 1)
+    return 0
 
 
 @bpf

blazesym-example/Cargo.lock

@@ -0,0 +1,405 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "adler2"
+version = "2.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "320119579fcad9c21884f5c4861d16174d0e06250625266f50fe6898340abefa"
+
+[[package]]
+name = "anstream"
+version = "0.6.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "43d5b281e737544384e969a5ccad3f1cdd24b48086a0fc1b2a5262a26b8f4f4a"
+dependencies = [
+ "anstyle",
+ "anstyle-parse",
+ "anstyle-query",
+ "anstyle-wincon",
+ "colorchoice",
+ "is_terminal_polyfill",
+ "utf8parse",
+]
+
+[[package]]
+name = "anstyle"
+version = "1.0.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5192cca8006f1fd4f7237516f40fa183bb07f8fbdfedaa0036de5ea9b0b45e78"
+
+[[package]]
+name = "anstyle-parse"
+version = "0.2.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4e7644824f0aa2c7b9384579234ef10eb7efb6a0deb83f9630a49594dd9c15c2"
+dependencies = [
+ "utf8parse",
+]
+
+[[package]]
+name = "anstyle-query"
+version = "1.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "40c48f72fd53cd289104fc64099abca73db4166ad86ea0b4341abe65af83dadc"
+dependencies = [
+ "windows-sys",
+]
+
+[[package]]
+name = "anstyle-wincon"
+version = "3.0.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "291e6a250ff86cd4a820112fb8898808a366d8f9f58ce16d1f538353ad55747d"
+dependencies = [
+ "anstyle",
+ "once_cell_polyfill",
+ "windows-sys",
+]
+
+[[package]]
+name = "anyhow"
+version = "1.0.100"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a23eb6b1614318a8071c9b2521f36b424b2c83db5eb3a0fead4a6c0809af6e61"
+
+[[package]]
+name = "bitflags"
+version = "2.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "812e12b5285cc515a9c72a5c1d3b6d46a19dac5acfef5265968c166106e31dd3"
+
+[[package]]
+name = "blazesym"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ace0ab71bbe9a25cb82f6d0e513ae11aebd1a38787664475bb2ed5cbe2329736"
+dependencies = [
+ "cpp_demangle",
+ "gimli",
+ "libc",
+ "memmap2",
+ "miniz_oxide",
+ "rustc-demangle",
+]
+
+[[package]]
+name = "cc"
+version = "1.2.46"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b97463e1064cb1b1c1384ad0a0b9c8abd0988e2a91f52606c80ef14aadb63e36"
+dependencies = [
+ "find-msvc-tools",
+ "shlex",
+]
+
+[[package]]
+name = "cfg-if"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9330f8b2ff13f34540b44e946ef35111825727b38d33286ef986142615121801"
+
+[[package]]
+name = "cfg_aliases"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "613afe47fcd5fac7ccf1db93babcb082c5994d996f20b8b159f2ad1658eb5724"
+
+[[package]]
+name = "clap"
+version = "4.5.51"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4c26d721170e0295f191a69bd9a1f93efcdb0aff38684b61ab5750468972e5f5"
+dependencies = [
+ "clap_builder",
+ "clap_derive",
+]
+
+[[package]]
+name = "clap_builder"
+version = "4.5.51"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "75835f0c7bf681bfd05abe44e965760fea999a5286c6eb2d59883634fd02011a"
+dependencies = [
+ "anstream",
+ "anstyle",
+ "clap_lex",
+ "strsim",
+]
+
+[[package]]
+name = "clap_derive"
+version = "4.5.49"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2a0b5487afeab2deb2ff4e03a807ad1a03ac532ff5a2cee5d86884440c7f7671"
+dependencies = [
+ "heck",
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "clap_lex"
+version = "0.7.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a1d728cc89cf3aee9ff92b05e62b19ee65a02b5702cff7d5a377e32c6ae29d8d"
+
+[[package]]
+name = "colorchoice"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b05b61dc5112cbb17e4b6cd61790d9845d13888356391624cbe7e41efeac1e75"
+
+[[package]]
+name = "cpp_demangle"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0667304c32ea56cb4cd6d2d7c0cfe9a2f8041229db8c033af7f8d69492429def"
+dependencies = [
+ "cfg-if",
+]
+
+[[package]]
+name = "equivalent"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "877a4ace8713b0bcf2a4e7eec82529c029f1d0619886d18145fea96c3ffe5c0f"
+
+[[package]]
+name = "fallible-iterator"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2acce4a10f12dc2fb14a218589d4f1f62ef011b2d0cc4b3cb1bba8e94da14649"
+
+[[package]]
+name = "find-msvc-tools"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3a3076410a55c90011c298b04d0cfa770b00fa04e1e3c97d3f6c9de105a03844"
+
+[[package]]
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+ "anyhow",
+ "blazesym",
+ "clap",
+ "libbpf-rs",
+ "libc",
+ "plain",
+]
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+]
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+ "cc",
+ "libc",
+]
+
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+dependencies = [
+ "windows-link",
+]

blazesym-example/Cargo.toml

@@ -0,0 +1,14 @@
+[package]
+name = "blazesym-example"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+libbpf-rs = "0.24"
+blazesym = "0.2.0-rc.4"
+anyhow = "1.0"
+clap = { version = "4.5", features = ["derive"] }
+libc = "0.2"
+plain = "0.2"
+
+[build-dependencies]

blazesym-example/src/main.rs

@@ -0,0 +1,333 @@
+// src/main.rs - Fixed imports and error handling
+use std::mem;
+use std::path::PathBuf;
+use std::time::Duration;
+
+use anyhow::{anyhow, Context, Result};
+use blazesym::symbolize::{CodeInfo, Input, Symbolized, Symbolizer};
+use blazesym::symbolize::source::{Source, Kernel, Process};
+use clap::Parser;
+use libbpf_rs::{MapCore, ObjectBuilder, RingBufferBuilder};  // Added MapCore
+
+// Match your Python struct exactly
+#[repr(C)]
+#[derive(Debug, Copy, Clone)]
+struct ExecEvent {
+    pid: i64,
+    cpu: i32,
+    timestamp: i64,
+    comm: [u8; 16],
+    kstack_sz: i64,
+    ustack_sz: i64,
+    kstack: [u8; 128],  // str(128) in Python
+    ustack: [u8; 128],  // str(128) in Python
+}
+
+unsafe impl plain::Plain for ExecEvent {}
+
+// Define perf_event constants (not in libc on all platforms)
+const PERF_TYPE_HARDWARE: u32 = 0;
+const PERF_TYPE_SOFTWARE: u32 = 1;
+const PERF_COUNT_HW_CPU_CYCLES: u64 = 0;
+const PERF_COUNT_SW_CPU_CLOCK: u64 = 0;
+
+#[repr(C)]
+struct PerfEventAttr {
+    type_: u32,
+    size: u32,
+    config: u64,
+    sample_period_or_freq: u64,
+    sample_type: u64,
+    read_format: u64,
+    flags: u64,
+    // ... rest can be zeroed
+    _padding: [u64; 64],
+}
+
+#[derive(Parser, Debug)]
+struct Args {
+    /// Path to the BPF object file
+    #[arg(default_value = "stack_traces.o")]
+    object_file: PathBuf,
+
+    /// Sampling frequency
+    #[arg(short, long, default_value_t = 50)]
+    freq: u64,
+
+    /// Use software events
+    #[arg(long)]
+    sw_event: bool,
+
+    /// Verbose output
+    #[arg(short, long)]
+    verbose: bool,
+}
+
+fn open_perf_event(cpu: i32, freq: u64, sw_event: bool) -> Result<i32> {
+    let mut attr: PerfEventAttr = unsafe { mem::zeroed() };
+
+    attr.size = mem::size_of::<PerfEventAttr>() as u32;
+    attr.type_ = if sw_event {
+        PERF_TYPE_SOFTWARE
+    } else {
+        PERF_TYPE_HARDWARE
+    };
+    attr.config = if sw_event {
+        PERF_COUNT_SW_CPU_CLOCK
+    } else {
+        PERF_COUNT_HW_CPU_CYCLES
+    };
+
+    // Use frequency-based sampling
+    attr.sample_period_or_freq = freq;
+    attr.flags = 1 << 10; // freq = 1, disabled = 1
+
+    let fd = unsafe {
+        libc::syscall(
+            libc::SYS_perf_event_open,
+            &attr as *const _,
+            -1,      // pid = -1 (all processes)
+            cpu,     // cpu
+            -1,      // group_fd
+            0,       // flags
+        )
+    };
+
+    if fd < 0 {
+        Err(anyhow!("Failed to open perf event on CPU {}: {}", cpu,
+                    std::io::Error::last_os_error()))
+    } else {
+        Ok(fd as i32)
+    }
+}
+
+fn print_stack_trace(
+    addrs: &[u64],
+    symbolizer: &Symbolizer,
+    pid: u32,
+    is_kernel: bool,
+) {
+    if addrs.is_empty() {
+        return;
+    }
+
+    let src = if is_kernel {
+        Source::Kernel(Kernel::default())
+    } else {
+        Source::Process(Process::new(pid.into()))
+    };
+
+    let syms = match symbolizer.symbolize(&src, Input::AbsAddr(addrs)) {
+        Ok(syms) => syms,
+        Err(e) => {
+            eprintln!("  Failed to symbolize: {}", e);
+            for addr in addrs {
+                println!("0x{:016x}: <no-symbol>", addr);
+            }
+            return;
+        }
+    };
+
+    for (addr, sym) in addrs.iter().zip(syms.iter()) {
+        match sym {
+            Symbolized::Sym(sym_info) => {
+                print!("0x{:016x}: {} @ 0x{:x}+0x{:x}",
+                       addr, sym_info.name, sym_info.addr, sym_info.offset);
+
+                if let Some(ref code_info) = sym_info.code_info {
+                    print_code_info(code_info);
+                }
+                println!();
+
+                // Print inlined frames
+                for inlined in &sym_info.inlined {
+                    print!("                  {} (inlined)", inlined.name);
+                    if let Some(ref code_info) = inlined.code_info {
+                        print_code_info(code_info);
+                    }
+                    println!();
+                }
+            }
+            Symbolized::Unknown(..) => {
+                println!("0x{:016x}: <no-symbol>", addr);
+            }
+        }
+    }
+}
+
+fn print_code_info(code_info: &CodeInfo) {
+    let path = code_info.to_path();
+    let path_str = path.display();
+
+    match (code_info.line, code_info.column) {
+        (Some(line), Some(col)) => print!(" {}:{}:{}", path_str, line, col),
+        (Some(line), None) => print!(" {}:{}", path_str, line),
+        (None, _) => print!(" {}", path_str),
+    }
+}
+
+fn handle_event(symbolizer: &Symbolizer, data: &[u8]) -> i32 {
+    let event = plain::from_bytes::<ExecEvent>(data).expect("Invalid event data");
+
+    // Extract comm string
+    let comm = std::str::from_utf8(&event.comm)
+        .unwrap_or("<unknown>")
+        .trim_end_matches('\0');
+
+    println!("[{:.9}] COMM: {} (pid={}) @ CPU {}",
+             event.timestamp as f64 / 1_000_000_000.0,
+             comm,
+             event.pid,
+             event.cpu);
+
+    // Handle kernel stack
+    if event.kstack_sz > 0 {
+        println!("Kernel:");
+        let num_frames = (event.kstack_sz / 8) as usize;
+        let kstack_u64 = unsafe {
+            std::slice::from_raw_parts(
+                event.kstack.as_ptr() as *const u64,
+                num_frames.min(16),
+            )
+        };
+
+        // Filter out zero addresses
+        let kstack: Vec<u64> = kstack_u64.iter()
+            .copied()
+            .take_while(|&addr| addr != 0)
+            .collect();
+
+        print_stack_trace(&kstack, symbolizer, 0, true);
+    } else {
+        println!("No Kernel Stack");
+    }
+
+    // Handle user stack
+    if event.ustack_sz > 0 {
+        println!("Userspace:");
+        let num_frames = (event.ustack_sz / 8) as usize;
+        let ustack_u64 = unsafe {
+            std::slice::from_raw_parts(
+                event.ustack.as_ptr() as *const u64,
+                num_frames.min(16),
+            )
+        };
+
+        // Filter out zero addresses
+        let ustack: Vec<u64> = ustack_u64.iter()
+            .copied()
+            .take_while(|&addr| addr != 0)
+            .collect();
+
+        print_stack_trace(&ustack, symbolizer, event.pid as u32, false);
+    } else {
+        println!("No Userspace Stack");
+    }
+
+    println!();
+    0
+}
+
+fn main() -> Result<()> {
+    let args = Args::parse();
+
+    if !args.object_file.exists() {
+        return Err(anyhow!("Object file not found: {:?}", args.object_file));
+    }
+
+    println!("Loading BPF object: {:?}", args.object_file);
+
+    // Load BPF object
+    let mut obj_builder = ObjectBuilder::default();
+    obj_builder.debug(args.verbose);
+
+    let open_obj = obj_builder
+        .open_file(&args.object_file)
+        .context("Failed to open BPF object")?;
+
+    let mut obj = open_obj.load().context("Failed to load BPF object")?;
+
+    println!("✓ BPF object loaded");
+
+    // Find the program
+    let prog = obj
+        .progs_mut()
+        .find(|p| p.name() == "trace_exec_enter")
+        .ok_or_else(|| anyhow!("Program 'trace_exec_enter' not found"))?;
+
+    println!("✓ Found program: trace_exec_enter");
+
+    // Find the map
+    let map = obj
+        .maps()
+        .find(|m| m.name() == "exec_events")
+        .ok_or_else(|| anyhow!("Map 'exec_events' not found"))?;
+
+    println!("✓ Found map: exec_events");
+
+    // Get number of CPUs
+    let num_cpus = libbpf_rs::num_possible_cpus()?;
+    println!("✓ Detected {} CPUs\n", num_cpus);
+
+    // Open perf events and attach BPF program
+    println!("Setting up perf events...");
+    let mut links = Vec::new();
+
+    for cpu in 0..num_cpus {
+        match open_perf_event(cpu as i32, args.freq, args.sw_event) {
+            Ok(perf_fd) => {
+                match prog.attach_perf_event(perf_fd) {
+                    Ok(link) => {
+                        links.push(link);
+                        if args.verbose {
+                            println!("  ✓ Attached to CPU {}", cpu);
+                        }
+                    }
+                    Err(e) => {
+                        eprintln!("  ✗ Failed to attach to CPU {}: {}", cpu, e);
+                        unsafe { libc::close(perf_fd); }
+                    }
+                }
+            }
+            Err(e) => {
+                if args.verbose {
+                    eprintln!("  ✗ Failed to open perf event on CPU {}: {}", cpu, e);
+                }
+            }
+        }
+    }
+
+    println!("✓ Attached to {} CPUs\n", links.len());
+
+    if links.is_empty() {
+        return Err(anyhow!("Failed to attach to any CPU"));
+    }
+
+    // Initialize symbolizer
+    let symbolizer = Symbolizer::new();
+
+    // Set up ring buffer
+    let mut builder = RingBufferBuilder::new();
+
+    builder.add(&map, move |data: &[u8]| -> i32 {
+        handle_event(&symbolizer, data)
+    })?;
+
+    let ringbuf = builder.build()?;
+
+    println!("========================================");
+    println!("Profiling started. Press Ctrl+C to stop.");
+    println!("========================================\n");
+
+    // Poll for events - just keep polling until error
+    loop {
+        if let Err(e) = ringbuf.poll(Duration::from_millis(100)) {
+            // Any error breaks the loop (including Ctrl+C)
+            eprintln!("\nStopping: {}", e);
+            break;
+        }
+    }
+
+    println!("Done.");
+    Ok(())
+}

blazesym-example/stack_traces.py

@@ -0,0 +1,49 @@
+# tests/passing_tests/ringbuf_advanced.py
+from pythonbpf import bpf, map, section, bpfglobal, struct, compile
+from pythonbpf.maps import RingBuffer
+from pythonbpf.helper import ktime, pid, smp_processor_id, comm, get_stack
+from ctypes import c_void_p, c_int32, c_int64
+import logging
+
+
+@bpf
+@struct
+class exec_event:
+    pid: c_int64
+    cpu: c_int32
+    timestamp: c_int64
+    comm: str(16)  # type: ignore [valid-type]
+    kstack_sz: c_int64
+    ustack_sz: c_int64
+    kstack: str(128)  # type: ignore [valid-type]
+    ustack: str(128)  # type: ignore [valid-type]
+
+
+@bpf
+@map
+def exec_events() -> RingBuffer:
+    return RingBuffer(max_entries=1048576)
+
+
+@bpf
+@section("perf_event")
+def trace_exec_enter(ctx: c_void_p) -> c_int64:
+    evt = exec_event()
+    evt.pid = pid()
+    evt.cpu = smp_processor_id()
+    evt.timestamp = ktime()
+    comm(evt.comm)
+    evt.kstack_sz = get_stack(evt.kstack)
+    evt.ustack_sz = get_stack(evt.ustack, 256)
+    exec_events.output(evt)
+    print(f"Submitted exec_event for pid: {evt.pid}, cpu: {evt.cpu}")
+    return 0  # type: ignore [return-value]
+
+
+@bpf
+@bpfglobal
+def LICENSE() -> str:
+    return "GPL"
+
+
+compile(logging.INFO)

docs/Makefile

@@ -0,0 +1,20 @@
+# Minimal makefile for Sphinx documentation
+#
+
+# You can set these variables from the command line, and also
+# from the environment for the first two.
+SPHINXOPTS    ?=
+SPHINXBUILD   ?= sphinx-build
+SOURCEDIR     = .
+BUILDDIR      = _build
+
+# Put it first so that "make" without argument is like "make help".
+help:
+	@$(SPHINXBUILD) -M help "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
+
+.PHONY: help Makefile
+
+# Catch-all target: route all unknown targets to Sphinx using the new
+# "make mode" option.  $(O) is meant as a shortcut for $(SPHINXOPTS).
+%: Makefile
+	@$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)

docs/README.md

@@ -0,0 +1,52 @@
+# PythonBPF Documentation
+
+This directory contains the Sphinx documentation for PythonBPF.
+
+## Building the Documentation
+
+### Prerequisites
+
+Install the documentation dependencies:
+
+**Using uv (recommended):**
+```bash
+uv pip install -r requirements.txt
+# Or install the optional docs dependencies
+uv pip install pythonbpf[docs]
+```
+
+**Using pip:**
+```bash
+pip install -r requirements.txt
+# Or install the optional docs dependencies
+pip install pythonbpf[docs]
+```
+
+### Build HTML Documentation
+
+```bash
+make html
+```
+
+The generated documentation will be in `_build/html/`. Open `_build/html/index.html` in a browser to view.
+
+### Other Build Formats
+
+```bash
+make latexpdf  # Build PDF documentation
+make epub      # Build ePub format
+make clean     # Clean build artifacts
+```
+
+## Documentation Structure
+
+- `index.md` - Main landing page
+- `getting-started/` - Installation and quick start guides
+- `user-guide/` - Comprehensive user documentation
+- `api/` - API reference documentation
+- `conf.py` - Sphinx configuration
+- `_static/` - Static files (images, CSS, etc.)
+
+## Writing Documentation
+
+Documentation is written in Markdown using [MyST-Parser](https://myst-parser.readthedocs.io/). See the existing files for examples.

docs/api/index.md

@@ -0,0 +1,471 @@
+# API Reference
+
+This section provides detailed API documentation for all PythonBPF modules, classes, and functions.
+
+## Module Overview
+
+PythonBPF is organized into several modules:
+
+* `pythonbpf` - Main module with decorators and compilation functions
+* `pythonbpf.maps` - BPF map types
+* `pythonbpf.helper` - BPF helper functions
+* `pythonbpf.structs` - Struct type handling
+* `pythonbpf.codegen` - Code generation and compilation
+
+## Public API
+
+The main `pythonbpf` module exports the following public API:
+
+```python
+from pythonbpf import (
+    # Decorators
+    bpf,
+    map,
+    section,
+    bpfglobal,
+    struct,
+
+    # Compilation
+    compile_to_ir,
+    compile,
+    BPF,
+
+    # Utilities
+    trace_pipe,
+    trace_fields,
+)
+```
+
+## Decorators
+
+```{eval-rst}
+.. automodule:: pythonbpf.decorators
+   :members:
+   :undoc-members:
+   :show-inheritance:
+```
+
+### bpf
+
+```python
+@bpf
+def my_function():
+    pass
+```
+
+Decorator to mark a function or class for BPF compilation. Any function or class decorated with `@bpf` will be processed by the PythonBPF compiler.
+
+**See also:** {doc}`../user-guide/decorators`
+
+### map
+
+```python
+@bpf
+@map
+def my_map() -> HashMap:
+    return HashMap(key=c_uint32, value=c_uint64, max_entries=1024)
+```
+
+Decorator to mark a function as a BPF map definition. The function must return a map type.
+
+**See also:** {doc}`../user-guide/maps`
+
+### section
+
+```python
+@bpf
+@section("tracepoint/syscalls/sys_enter_open")
+def trace_open(ctx: c_void_p) -> c_int64:
+    return c_int64(0)
+```
+
+Decorator to specify which kernel hook to attach the BPF program to.
+
+**Parameters:**
+* `name` (str) - The section name (e.g., "tracepoint/...", "kprobe/...", "xdp")
+
+**See also:** {doc}`../user-guide/decorators`
+
+### bpfglobal
+
+```python
+@bpf
+@bpfglobal
+def LICENSE() -> str:
+    return "GPL"
+```
+
+Decorator to mark a function as a BPF global variable definition.
+
+**See also:** {doc}`../user-guide/decorators`
+
+### struct
+
+```python
+@bpf
+@struct
+class Event:
+    timestamp: c_uint64
+    pid: c_uint32
+```
+
+Decorator to mark a class as a BPF struct definition.
+
+**See also:** {doc}`../user-guide/structs`
+
+## Compilation Functions
+
+```{eval-rst}
+.. automodule:: pythonbpf.codegen
+   :members: compile_to_ir, compile, BPF
+   :undoc-members:
+   :show-inheritance:
+```
+
+### compile_to_ir()
+
+```python
+def compile_to_ir(
+    filename: str,
+    output: str,
+    loglevel=logging.WARNING
+) -> None
+```
+
+Compile Python source to LLVM Intermediate Representation.
+
+**Parameters:**
+* `filename` (str) - Path to the Python source file
+* `output` (str) - Path for the output LLVM IR file (.ll)
+* `loglevel` - Logging level (default: logging.WARNING)
+
+**See also:** {doc}`../user-guide/compilation`
+
+### compile()
+
+```python
+def compile(
+    filename: str = None,
+    output: str = None,
+    loglevel=logging.WARNING
+) -> None
+```
+
+Compile Python source to BPF object file.
+
+**Parameters:**
+* `filename` (str, optional) - Path to the Python source file (default: calling file)
+* `output` (str, optional) - Path for the output object file (default: same name with .o extension)
+* `loglevel` - Logging level (default: logging.WARNING)
+
+**See also:** {doc}`../user-guide/compilation`
+
+### BPF
+
+```python
+class BPF:
+    def __init__(
+        self,
+        filename: str = None,
+        loglevel=logging.WARNING
+    )
+
+    def load(self) -> BpfObject
+    def attach_all(self) -> None
+    def load_and_attach(self) -> BpfObject
+```
+
+High-level interface to compile, load, and attach BPF programs.
+
+**Parameters:**
+* `filename` (str, optional) - Path to Python source file (default: calling file)
+* `loglevel` - Logging level (default: logging.WARNING)
+
+**Methods:**
+* `load()` - Load the compiled BPF program into the kernel
+* `attach_all()` - Attach all BPF programs to their hooks
+* `load_and_attach()` - Convenience method that loads and attaches
+
+**See also:** {doc}`../user-guide/compilation`
+
+## Utilities
+
+```{eval-rst}
+.. automodule:: pythonbpf.utils
+   :members:
+   :undoc-members:
+   :show-inheritance:
+```
+
+### trace_pipe()
+
+```python
+def trace_pipe() -> None
+```
+
+Read and display output from the kernel trace pipe.
+
+Blocks until interrupted with Ctrl+C. Displays BPF program output from `print()` statements.
+
+**See also:** {doc}`../user-guide/helpers`
+
+### trace_fields()
+
+```python
+def trace_fields() -> tuple
+```
+
+Parse one line from the trace pipe into structured fields.
+
+**Returns:** Tuple of `(task, pid, cpu, flags, timestamp, message)`
+* `task` (str) - Task/process name
+* `pid` (int) - Process ID
+* `cpu` (int) - CPU number
+* `flags` (bytes) - Trace flags
+* `timestamp` (float) - Timestamp in seconds
+* `message` (str) - The trace message
+
+**See also:** {doc}`../user-guide/helpers`
+
+## Map Types
+
+```{eval-rst}
+.. automodule:: pythonbpf.maps.maps
+   :members:
+   :undoc-members:
+   :show-inheritance:
+```
+
+### HashMap
+
+```python
+class HashMap:
+    def __init__(
+        self,
+        key,
+        value,
+        max_entries: int
+    )
+
+    def lookup(self, key)
+    def update(self, key, value, flags=None)
+    def delete(self, key)
+```
+
+Hash map for efficient key-value storage.
+
+**Parameters:**
+* `key` - The type of the key (ctypes type or struct)
+* `value` - The type of the value (ctypes type or struct)
+* `max_entries` (int) - Maximum number of entries
+
+**Methods:**
+* `lookup(key)` - Look up a value by key
+* `update(key, value, flags=None)` - Update or insert a key-value pair
+* `delete(key)` - Remove an entry from the map
+
+**See also:** {doc}`../user-guide/maps`
+
+### PerfEventArray
+
+```python
+class PerfEventArray:
+    def __init__(
+        self,
+        key_size,
+        value_size
+    )
+
+    def output(self, data)
+```
+
+Perf event array for sending data to userspace.
+
+**Parameters:**
+* `key_size` - Type for the key
+* `value_size` - Type for the value
+
+**Methods:**
+* `output(data)` - Send data to userspace
+
+**See also:** {doc}`../user-guide/maps`
+
+### RingBuffer
+
+```python
+class RingBuffer:
+    def __init__(self, max_entries: int)
+
+    def output(self, data, flags=0)
+    def reserve(self, size: int)
+    def submit(self, data, flags=0)
+    def discard(self, data, flags=0)
+```
+
+Ring buffer for efficient event delivery.
+
+**Parameters:**
+* `max_entries` (int) - Maximum size in bytes (must be power of 2)
+
+**Methods:**
+* `output(data, flags=0)` - Send data to the ring buffer
+* `reserve(size)` - Reserve space in the buffer
+* `submit(data, flags=0)` - Submit previously reserved space
+* `discard(data, flags=0)` - Discard previously reserved space
+
+**See also:** {doc}`../user-guide/maps`
+
+## Helper Functions
+
+```{eval-rst}
+.. automodule:: pythonbpf.helper.helpers
+   :members:
+   :undoc-members:
+   :show-inheritance:
+```
+
+### Process Information
+
+* `pid()` - Get current process ID
+* `comm(buf)` - Get current process command name (requires buffer parameter)
+* `uid()` - Get current user ID
+
+### Time
+
+* `ktime()` - Get current kernel time in nanoseconds
+
+### CPU
+
+* `smp_processor_id()` - Get current CPU ID
+
+### Memory
+
+* `probe_read(dst, size, src)` - Safely read kernel memory
+* `probe_read_str(dst, src)` - Safely read string from kernel memory
+* `deref(ptr)` - Dereference a pointer
+
+### Random
+
+* `random()` - Get pseudo-random number
+
+**See also:** {doc}`../user-guide/helpers`
+
+## Type System
+
+PythonBPF uses Python's `ctypes` module for type definitions:
+
+### Integer Types
+
+* `c_int8`, `c_int16`, `c_int32`, `c_int64` - Signed integers
+* `c_uint8`, `c_uint16`, `c_uint32`, `c_uint64` - Unsigned integers
+
+### Other Types
+
+* `c_char`, `c_bool` - Characters and booleans
+* `c_void_p` - Void pointers
+* `str(N)` - Fixed-length strings
+
+## Examples
+
+### Basic Usage
+
+```python
+from pythonbpf import bpf, section, bpfglobal, BPF, trace_pipe
+from ctypes import c_void_p, c_int64
+
+@bpf
+@section("tracepoint/syscalls/sys_enter_execve")
+def hello(ctx: c_void_p) -> c_int64:
+    print("Hello, World!")
+    return 0
+
+@bpf
+@bpfglobal
+def LICENSE() -> str:
+    return "GPL"
+
+b = BPF()
+b.load_and_attach()
+trace_pipe()
+```
+
+### With Maps
+
+```python
+from pythonbpf import bpf, map, section, bpfglobal, BPF
+from pythonbpf.maps import HashMap
+from pythonbpf.helper import pid
+from ctypes import c_void_p, c_int64, c_uint32, c_uint64
+
+@bpf
+@map
+def counters() -> HashMap:
+    return HashMap(key=c_uint32, value=c_uint64, max_entries=256)
+
+@bpf
+@section("tracepoint/syscalls/sys_enter_clone")
+def count_clones(ctx: c_void_p) -> c_int64:
+    process_id = pid()
+    count = counters.lookup(process_id)
+
+    if count:
+        counters.update(process_id, count + 1)
+    else:
+        counters.update(process_id, 1)
+
+    return 0
+
+@bpf
+@bpfglobal
+def LICENSE() -> str:
+    return "GPL"
+
+b = BPF()
+b.load_and_attach()
+```
+
+### With Structs
+
+```python
+from pythonbpf import bpf, struct, map, section, bpfglobal, BPF
+from pythonbpf.maps import RingBuffer
+from pythonbpf.helper import pid, ktime, comm
+from ctypes import c_void_p, c_int64, c_uint32, c_uint64
+
+@bpf
+@struct
+class Event:
+    timestamp: c_uint64
+    pid: c_uint32
+    comm: str(16)
+
+@bpf
+@map
+def events() -> RingBuffer:
+    return RingBuffer(max_entries=4096)
+
+@bpf
+@section("tracepoint/syscalls/sys_enter_execve")
+def track_exec(ctx: c_void_p) -> c_int64:
+    event = Event()
+    event.timestamp = ktime()
+    event.pid = pid()
+    comm(event.comm)
+
+    events.output(event)
+    return 0
+
+@bpf
+@bpfglobal
+def LICENSE() -> str:
+    return "GPL"
+
+b = BPF()
+b.load_and_attach()
+```
+
+## See Also
+
+* {doc}`../user-guide/index` - Comprehensive user guide
+* {doc}`../getting-started/quickstart` - Quick start tutorial
+* [GitHub Repository](https://github.com/pythonbpf/Python-BPF) - Source code and examples

docs/conf.py

@@ -0,0 +1,105 @@
+# Configuration file for the Sphinx documentation builder.
+#
+# For the full list of built-in configuration values, see the documentation:
+# https://www.sphinx-doc.org/en/master/usage/configuration.html
+
+import os
+import sys
+
+# Add the parent directory to the path so we can import pythonbpf
+sys.path.insert(0, os.path.abspath(".."))
+
+# -- Project information -----------------------------------------------------
+# https://www.sphinx-doc.org/en/master/usage/configuration.html#project-information
+
+project = "PythonBPF"
+copyright = "2026, Pragyansh Chaturvedi, Varun Mallya"
+author = "Pragyansh Chaturvedi, Varun Mallya"
+release = "0.1.8"
+version = "0.1.8"
+
+# -- General configuration ---------------------------------------------------
+# https://www.sphinx-doc.org/en/master/usage/configuration.html#general-configuration
+
+extensions = [
+    "myst_parser",
+    "sphinx.ext.autodoc",
+    "sphinx.ext.napoleon",
+    "sphinx.ext.viewcode",
+    "sphinx.ext.intersphinx",
+    "sphinx_copybutton",
+]
+
+# MyST-Parser configuration
+myst_enable_extensions = [
+    "colon_fence",
+    "deflist",
+    "fieldlist",
+]
+
+# Napoleon settings for Google/NumPy style docstrings
+napoleon_google_docstring = True
+napoleon_numpy_docstring = True
+napoleon_include_init_with_doc = True
+napoleon_include_private_with_doc = False
+napoleon_include_special_with_doc = True
+napoleon_use_admonition_for_examples = True
+napoleon_use_admonition_for_notes = True
+napoleon_use_admonition_for_references = False
+napoleon_use_ivar = False
+napoleon_use_param = True
+napoleon_use_rtype = True
+napoleon_type_aliases = None
+
+# Intersphinx mapping
+intersphinx_mapping = {
+    "python": ("https://docs.python.org/3", None),
+    "llvmlite": ("https://llvmlite.readthedocs.io/en/latest/", None),
+}
+
+templates_path = ["_templates"]
+exclude_patterns = ["_build", "Thumbs.db", ".DS_Store"]
+
+# Source file suffixes
+source_suffix = {
+    ".rst": "restructuredtext",
+    ".md": "markdown",
+}
+
+# The master toctree document
+master_doc = "index"
+
+# -- Options for HTML output -------------------------------------------------
+# https://www.sphinx-doc.org/en/master/usage/configuration.html#options-for-html-output
+
+html_theme = "sphinx_rtd_theme"
+html_static_path = ["_static"]
+
+# Theme options
+html_theme_options = {
+    "logo_only": False,
+    "display_version": True,
+    "prev_next_buttons_location": "bottom",
+    "style_external_links": False,
+    "vcs_pageview_mode": "",
+    # Toc options
+    "collapse_navigation": False,
+    "sticky_navigation": True,
+    "navigation_depth": 4,
+    "includehidden": True,
+    "titles_only": False,
+}
+
+# -- Options for autodoc -----------------------------------------------------
+
+autodoc_default_options = {
+    "members": True,
+    "member-order": "bysource",
+    "special-members": "__init__",
+    "undoc-members": True,
+    "exclude-members": "__weakref__",
+}
+
+autodoc_typehints = "description"
+
+exclude_patterns = ["README.md"]

docs/getting-started/index.md

@@ -0,0 +1,35 @@
+# Getting Started
+
+Welcome to PythonBPF! This section will help you get started with writing eBPF programs in Python.
+
+## What You'll Learn
+
+In this section, you'll learn how to:
+
+1. **Install PythonBPF** - Set up your development environment with all necessary dependencies
+2. **Write Your First Program** - Create a simple BPF program to understand the basics
+3. **Understand Core Concepts** - Learn about decorators, compilation, and program structure
+
+## Prerequisites
+
+Before you begin, make sure you have:
+
+* A Linux system (eBPF requires Linux kernel 4.15+)
+* Python 3.10 or higher
+* Root or sudo access (required for loading BPF programs)
+
+## Next Steps
+
+After completing the getting started guide, you can:
+
+* Explore the {doc}`../user-guide/index` for detailed information on features
+* Check out the {doc}`../api/index`
+* Browse the [examples directory](https://github.com/pythonbpf/Python-BPF/tree/master/examples) and the [BCC examples directory](https://github.com/pythonbpf/Python-BPF/tree/master/BCC-Examples)
+
+## Need Help?
+
+If you encounter any issues:
+
+* Check the [GitHub Issues](https://github.com/pythonbpf/Python-BPF/issues) for known problems
+* Review the [README](https://github.com/pythonbpf/Python-BPF/blob/master/README.md) for additional information
+* Reach out to the maintainers: [@r41k0u](https://github.com/r41k0u) and [@varun-r-mallya](https://github.com/varun-r-mallya)

docs/getting-started/installation.md

@@ -0,0 +1,182 @@
+# Installation
+
+This guide will walk you through installing PythonBPF and its dependencies.
+
+## Prerequisites
+
+### System Requirements
+
+PythonBPF requires:
+
+* **Linux** - eBPF is a Linux kernel feature (kernel 4.15 or higher recommended)
+* **Python 3.10+** - Python 3.10 or higher is required
+* **Root/sudo access** - Loading BPF programs into the kernel requires elevated privileges
+
+### Required System Packages
+
+Before installing PythonBPF, you need to install the following system packages:
+
+#### On Ubuntu/Debian:
+
+```bash
+sudo apt-get update
+sudo apt-get install -y bpftool clang llvm
+```
+
+#### On Fedora/RHEL/CentOS:
+
+```bash
+sudo dnf install -y bpftool clang llvm
+```
+
+#### On Arch Linux:
+
+```bash
+sudo pacman -S bpf clang llvm
+```
+
+## Installing PythonBPF
+
+### From PyPI (Recommended)
+
+The easiest way to install PythonBPF is using uv or pip:
+
+**Using uv (recommended):**
+```bash
+uv pip install pythonbpf pylibbpf
+```
+
+**Using pip:**
+```bash
+pip install pythonbpf pylibbpf
+```
+
+This will install:
+* `pythonbpf` - The main package for writing and compiling BPF programs
+* `pylibbpf` - Python bindings for libbpf, used to load and attach BPF programs
+
+### Development Installation
+
+If you want to contribute to PythonBPF or work with the latest development version:
+
+1. Clone the repository:
+
+```bash
+git clone https://github.com/pythonbpf/Python-BPF.git
+cd Python-BPF
+```
+
+2. Create and activate a virtual environment:
+
+```bash
+python3 -m venv .venv
+source .venv/bin/activate  # On Windows: .venv\Scripts\activate
+```
+
+3. Install in development mode:
+
+**Using uv (recommended):**
+```bash
+uv pip install -e .
+uv pip install pylibbpf
+```
+
+**Using pip:**
+```bash
+pip install -e .
+pip install pylibbpf
+```
+
+4. Install development dependencies:
+
+```bash
+make install
+```
+
+### Installing Documentation Dependencies
+
+If you want to build the documentation locally:
+
+**Using uv (recommended):**
+```bash
+uv pip install pythonbpf[docs]
+# Or from the repository root:
+uv pip install -e .[docs]
+```
+
+**Using pip:**
+```bash
+pip install pythonbpf[docs]
+# Or from the repository root:
+pip install -e .[docs]
+```
+
+## Generating vmlinux.py
+
+`vmlinux.py` contains the running kernel's data structures and is analogous to `vmlinux.h` included in eBPF programs written in C. Some examples require access to it. To use these features, you need to generate a `vmlinux.py` file:
+
+1. Install additional dependencies:
+
+**Using uv (recommended):**
+```bash
+uv pip install ctypeslib2
+```
+
+**Using pip:**
+```bash
+pip install ctypeslib2
+```
+
+2. Generate the vmlinux.py file:
+
+```bash
+sudo tools/vmlinux-gen.py
+```
+
+3. Copy the generated file to your working directory or the examples directory as needed.
+
+```{warning}
+The `vmlinux.py` file is kernel-specific. If you upgrade your kernel, you may need to regenerate this file.
+```
+
+## Verifying Installation
+
+To verify that PythonBPF is installed correctly, run:
+
+```bash
+python3 -c "import pythonbpf; print(pythonbpf.__all__)"
+```
+
+You should see output similar to:
+
+```
+['bpf', 'map', 'section', 'bpfglobal', 'struct', 'compile_to_ir', 'compile', 'BPF', 'trace_pipe', 'trace_fields']
+```
+
+## Troubleshooting
+
+### Permission Errors
+
+If you encounter permission errors when running BPF programs:
+
+* Make sure you're running with `sudo` or as root
+* Check that `/sys/kernel/tracing/` is accessible
+
+### LLVM/Clang Not Found
+
+If you get errors about `llc` or `clang` not being found:
+
+* Verify they're installed: `which llc` and `which clang`
+* Check your PATH environment variable includes the LLVM bin directory
+
+### Import Errors
+
+If Python can't find the `pythonbpf` module:
+
+* Make sure you've activated your virtual environment
+* Verify installation with `uv pip list | grep pythonbpf` or `pip list | grep pythonbpf`
+* Try reinstalling: `uv pip install --force-reinstall pythonbpf` or `pip install --force-reinstall pythonbpf`
+
+## Next Steps
+
+Now that you have PythonBPF installed, continue to the {doc}`quickstart` guide to write your first BPF program!

docs/getting-started/quickstart.md

@@ -0,0 +1,249 @@
+# Quick Start
+
+This guide will walk you through creating your first BPF program with PythonBPF.
+
+## Your First BPF Program
+
+Let's create a simple "Hello World" program that prints a message every time a process is executed on your system.
+
+### Step 1: Create the Program
+
+Create a new file called `hello_world.py`:
+
+```python
+from pythonbpf import bpf, section, bpfglobal, BPF, trace_pipe
+from ctypes import c_void_p, c_int64
+
+@bpf
+@section("tracepoint/syscalls/sys_enter_execve")
+def hello_world(ctx: c_void_p) -> c_int64:
+    print("Hello, World!")
+    return 0
+
+@bpf
+@bpfglobal
+def LICENSE() -> str:
+    return "GPL"
+
+b = BPF()
+b.load()
+b.attach_all()
+trace_pipe()
+```
+
+### Step 2: Run the Program
+
+Run the program with sudo (required for BPF operations):
+
+```bash
+sudo python3 hello_world.py
+```
+
+### Step 3: See it in Action
+
+Open another terminal and run any command:
+
+```bash
+ls
+echo "test"
+date
+```
+
+You should see "Hello, World!" printed in the first terminal for each command executed!
+
+Press `Ctrl+C` to stop the program.
+
+## Understanding the Code
+
+Let's break down what each part does:
+
+### Imports
+
+```python
+from pythonbpf import bpf, section, bpfglobal, BPF, trace_pipe
+from ctypes import c_void_p, c_int64
+```
+
+* `bpf` - Decorator to mark functions for BPF compilation
+* `section` - Decorator to specify which kernel event to attach to
+* `bpfglobal` - Decorator for BPF global variables
+* `BPF` - Class to compile, load, and attach BPF programs
+* `trace_pipe` - Utility to read kernel trace output (similar to BCC)
+* `c_void_p`, `c_int64` - C types for function signatures
+
+### The BPF Function
+
+```python
+@bpf
+@section("tracepoint/syscalls/sys_enter_execve")
+def hello_world(ctx: c_void_p) -> c_int64:
+    print("Hello, World!")
+    return 0
+```
+
+* `@bpf` - Marks this function to be compiled to BPF bytecode
+* `@section("tracepoint/syscalls/sys_enter_execve")` - Attaches to the execve syscall tracepoint (called when processes start)
+* `ctx: c_void_p` - Context parameter (required for all BPF functions)
+* `print()` - the PythonBPF API for `bpf_printk` helper function
+* `return 0` - BPF functions must return an integer
+
+### License Declaration
+
+```python
+@bpf
+@bpfglobal
+def LICENSE() -> str:
+    return "GPL"
+```
+
+* The Linux kernel requires BPF programs to declare a license
+* Most kernel features require GPL-compatible licenses
+* This is defined as a BPF global variable
+
+### Compilation and Execution
+
+```python
+b = BPF()
+b.load()
+b.attach_all()
+trace_pipe()
+```
+
+* `BPF()` - Creates a BPF object and compiles the current file
+* `b.load()` - Loads the compiled BPF program into the kernel
+* `b.attach_all()` - Attaches all BPF programs to their specified hooks
+* `trace_pipe()` - Reads and displays output from the kernel trace buffer
+
+Alternatively, you can also use the `compile()` function to compile the BPF code to an object file:
+
+```python
+from pythonbpf import compile
+```
+
+This object file can then be loaded using any other userspace library in any language.
+
+## Next Example: Tracking Process IDs
+
+Let's make a more interesting program that tracks which processes are being created:
+
+```python
+from pythonbpf import bpf, section, bpfglobal, BPF, trace_pipe
+from pythonbpf.helper import pid
+from ctypes import c_void_p, c_int64
+
+@bpf
+@section("tracepoint/syscalls/sys_enter_execve")
+def track_exec(ctx: c_void_p) -> c_int64:
+    process_id = pid()
+    print(f"Process with PID: {process_id} is starting")
+    return 0
+
+@bpf
+@bpfglobal
+def LICENSE() -> str:
+    return "GPL"
+
+b = BPF()
+b.load()
+b.attach_all()
+trace_pipe()
+```
+
+This program uses BPF helper functions:
+
+* `pid()` - Gets the current process ID
+
+Run it with `sudo python3 track_exec.py` and watch processes being created!
+
+## Common Patterns
+
+### Tracepoints
+
+Tracepoints are predefined hooks in the kernel. Common ones include:
+
+```python
+# System calls
+@section("tracepoint/syscalls/sys_enter_execve")
+@section("tracepoint/syscalls/sys_enter_clone")
+@section("tracepoint/syscalls/sys_enter_open")
+
+# Scheduler events
+@section("tracepoint/sched/sched_process_fork")
+@section("tracepoint/sched/sched_switch")
+```
+
+### Kprobes
+
+Kprobes allow you to attach to any kernel function:
+
+```python
+@section("kprobe/do_sys_open")
+def trace_open(ctx: c_void_p) -> c_int64:
+    print("File is being opened")
+    return 0
+```
+
+### XDP (eXpress Data Path)
+
+For network packet processing:
+
+```python
+from pythonbpf.helper import XDP_PASS
+
+@section("xdp")
+def xdp_pass(ctx: c_void_p) -> c_int64:
+    return XDP_PASS
+```
+
+## Best Practices
+
+1. **Always include a LICENSE** - Required by the kernel
+2. **Use type hints** - Required by PythonBPF to generate correct code
+3. **Return the correct type** - Match the expected return type for your program type
+4. **Test incrementally** - Start simple and add complexity gradually
+5. **Check kernel logs** - Use `dmesg` to see BPF verifier messages if loading fails
+
+## Common Issues
+
+### Program Won't Load
+
+If your BPF program fails to load:
+
+* Check `dmesg` for verifier error messages
+* Ensure your LICENSE is GPL-compatible
+* Verify you're using supported BPF features
+* Make sure return types match function signatures
+
+### No Output
+
+If you don't see output:
+
+* Verify the tracepoint/kprobe is being triggered
+* Check that you're running with sudo
+* Ensure `/sys/kernel/tracing/trace_pipe` is accessible
+
+### Compilation Errors
+
+If compilation fails:
+
+* Check that `llc` is installed and in your PATH
+* Verify your Python syntax is correct
+* Ensure all imported types are from `ctypes`
+* In the worst case, compile object files manually using `compile_to_ir()` and `llc` to get detailed errors
+
+### Verification Failure
+
+If verification fails:
+
+* Compile the object files using `compile()` function instead of loading directly
+* Run `sudo check.sh check <bpf>.o` to get detailed verification output
+
+## Next Steps
+
+Now that you understand the basics, explore:
+
+* {doc}`../user-guide/decorators` - Learn about all available decorators
+* {doc}`../user-guide/maps` - Use BPF maps for data storage and communication
+* {doc}`../user-guide/structs` - Define custom data structures
+* {doc}`../user-guide/helpers` - Discover all available BPF helper functions
+* [Examples directory](https://github.com/pythonbpf/Python-BPF/tree/master/examples) - See more complex examples

docs/index.md

@@ -0,0 +1,95 @@
+# PythonBPF Documentation
+
+Welcome to **PythonBPF** - a Python frontend for writing eBPF programs without embedding C code. PythonBPF uses [llvmlite](https://github.com/numba/llvmlite) to generate LLVM IR and compiles directly to eBPF object files that can be loaded into the Linux kernel.
+
+```{note}
+This project is under active development.
+```
+
+## What is PythonBPF?
+
+PythonBPF is an LLVM IR generator for eBPF programs written in Python. It provides:
+
+* **Pure Python syntax** - Write eBPF programs in Python using familiar decorators and type annotations
+* **Direct compilation** - Compile to LLVM object files without relying on BCC
+* **Full eBPF features** - Support for maps, helpers, global definitions, and more
+* **Integration with libbpf** - Works with [pylibbpf](https://github.com/pythonbpf/pylibbpf) for object loading and execution
+
+## Quick Example
+
+Here's a simple "Hello World" BPF program that traces process creation:
+
+```python
+from pythonbpf import bpf, section, bpfglobal, BPF, trace_pipe
+from ctypes import c_void_p, c_int64
+
+@bpf
+@section("tracepoint/syscalls/sys_enter_execve")
+def hello_world(ctx: c_void_p) -> c_int64:
+    print("Hello, World!")
+    return 0
+
+@bpf
+@bpfglobal
+def LICENSE() -> str:
+    return "GPL"
+
+b = BPF()
+b.load()
+b.attach_all()
+trace_pipe()
+```
+
+## Features
+
+* Generate eBPF programs directly using Python syntax
+* Compile to LLVM object files for kernel execution
+* Built with `llvmlite` for IR generation
+* Supports maps, helpers, and global definitions for BPF
+* Companion project: [pylibbpf](https://github.com/pythonbpf/pylibbpf), which provides bindings for libbpf
+
+## Table of Contents
+
+```{toctree}
+:maxdepth: 2
+:caption: Getting Started
+
+getting-started/index
+getting-started/installation
+getting-started/quickstart
+```
+
+```{toctree}
+:maxdepth: 2
+:caption: User Guide
+
+user-guide/index
+user-guide/decorators
+user-guide/maps
+user-guide/structs
+user-guide/compilation
+user-guide/helpers
+```
+
+```{toctree}
+:maxdepth: 2
+:caption: API Reference
+
+api/index
+```
+
+## Links
+
+* **GitHub Repository**: [pythonbpf/Python-BPF](https://github.com/pythonbpf/Python-BPF)
+* **PyPI Package**: [pythonbpf](https://pypi.org/project/pythonbpf/)
+* **Video Demo**: [YouTube](https://www.youtube.com/watch?v=eFVhLnWFxtE)
+
+## License
+
+PythonBPF is licensed under the Apache License 2.0.
+
+## Indices and tables
+
+* {ref}`genindex`
+* {ref}`modindex`
+* {ref}`search`

docs/requirements.txt

@@ -0,0 +1,4 @@
+myst-parser>=2.0
+sphinx>=7.0
+sphinx-copybutton
+sphinx-rtd-theme>=2.0

docs/user-guide/compilation.md

@@ -0,0 +1,432 @@
+# Compilation
+
+PythonBPF provides several functions and classes for compiling Python code into BPF bytecode and loading it into the kernel.
+
+## Overview
+
+The compilation process transforms Python code into executable BPF programs:
+
+1. **Python AST** → LLVM IR generation (using llvmlite)
+2. **LLVM IR** → BPF bytecode (using llc)
+3. **BPF Object** → Kernel loading (using libbpf)
+
+## Compilation Functions
+
+### compile_to_ir()
+
+Compile Python source to LLVM Intermediate Representation.
+
+#### Signature
+
+```python
+def compile_to_ir(filename: str, output: str, loglevel=logging.WARNING)
+```
+
+#### Parameters
+
+* `filename` - Path to the Python source file to compile
+* `output` - Path where the LLVM IR file (.ll) should be written
+* `loglevel` - Logging level (default: `logging.WARNING`)
+
+#### Usage
+
+```python
+from pythonbpf import compile_to_ir
+import logging
+
+# Compile to LLVM IR
+compile_to_ir(
+    filename="my_bpf_program.py",
+    output="my_bpf_program.ll",
+    loglevel=logging.DEBUG
+)
+```
+
+#### Output
+
+This function generates an `.ll` file containing LLVM IR, which is human-readable assembly-like code. This is useful for:
+
+* Debugging compilation issues
+* Understanding code generation
+
+### compile()
+
+Compile Python source to BPF object file.
+
+#### Signature
+
+```python
+def compile(filename: str = None, output: str = None, loglevel=logging.WARNING)
+```
+
+#### Parameters
+
+* `filename` - Path to the Python source file (default: calling file)
+* `output` - Path for the output object file (default: same name with `.o` extension)
+* `loglevel` - Logging level (default: `logging.WARNING`)
+
+#### Usage
+
+```python
+from pythonbpf import compile
+import logging
+
+# Compile current file
+compile()
+
+# Compile specific file
+compile(filename="my_program.py", output="my_program.o")
+
+# Compile with debug logging
+compile(loglevel=logging.DEBUG)
+```
+
+#### Output
+
+This function generates a `.o` file containing BPF bytecode that can be:
+
+* Loaded into the kernel
+* Inspected with `bpftool`
+* Verified with the BPF verifier
+* Distributed as a compiled binary
+
+### BPF Class
+
+The `BPF` class provides a high-level interface to compile, load, and attach BPF programs.
+
+#### Signature
+
+```python
+class BPF:
+    def __init__(self, filename: str = None, loglevel=logging.WARNING)
+    def load(self)
+    def attach_all(self)
+    def load_and_attach(self)
+```
+
+#### Parameters
+
+* `filename` - Path to Python source file (default: calling file)
+* `loglevel` - Logging level (default: `logging.WARNING`)
+
+#### Methods
+
+##### __init__()
+
+Create a BPF object and compile the source.
+
+```python
+from pythonbpf import BPF
+
+# Compile current file
+b = BPF()
+
+# Compile specific file
+b = BPF(filename="my_program.py")
+```
+
+##### load()
+
+Load the compiled BPF program into the kernel.
+
+```python
+b = BPF()
+b.load()
+```
+
+This method:
+* Loads the BPF object file into the kernel
+* Creates maps
+* Verifies the BPF program
+* Returns a `BpfObject` instance
+
+##### attach_all()
+
+Attach all BPF programs to their specified hooks.
+
+```python
+b = BPF()
+b.load()
+b.attach_all()
+```
+
+This method:
+* Attaches tracepoints
+* Attaches kprobes/kretprobes
+* Attaches XDP programs
+* Enables all hooks
+
+##### load_and_attach()
+
+Convenience method that loads and attaches in one call.
+
+```python
+b = BPF()
+b.load_and_attach()
+```
+
+Equivalent to:
+```python
+b = BPF()
+b.load()
+b.attach_all()
+```
+
+## Complete Example
+
+Here's a complete example showing the compilation workflow:
+
+```python
+from pythonbpf import bpf, section, bpfglobal, BPF, trace_pipe
+from ctypes import c_void_p, c_int64
+
+@bpf
+@section("tracepoint/syscalls/sys_enter_execve")
+def trace_exec(ctx: c_void_p) -> c_int64:
+    print("Process started")
+    return 0
+
+@bpf
+@bpfglobal
+def LICENSE() -> str:
+    return "GPL"
+
+if __name__ == "__main__":
+    # Method 1: Simple compilation and loading
+    b = BPF()
+    b.load_and_attach()
+    trace_pipe()
+
+    # Method 2: Step-by-step
+    # b = BPF()
+    # b.load()
+    # b.attach_all()
+    # trace_pipe()
+
+    # Method 3: Manual compilation
+    # from pythonbpf import compile
+    # compile(filename="my_program.py", output="my_program.o")
+    # # Then load with pylibbpf directly
+```
+
+## Compilation Pipeline Details
+
+### AST Parsing
+
+The Python `ast` module parses your source code:
+
+```python
+import ast
+tree = ast.parse(source_code, filename)
+```
+
+The AST is then walked to find:
+* Functions decorated with `@bpf`
+* Classes decorated with `@struct`
+* Map definitions with `@map`
+* Global variables with `@bpfglobal`
+
+### IR Generation
+
+PythonBPF uses `llvmlite` to generate LLVM IR:
+
+```python
+from llvmlite import ir
+
+# Create module
+module = ir.Module(name='bpf_module')
+module.triple = 'bpf'
+
+# Generate IR for each BPF function
+# ...
+```
+
+Key aspects of IR generation:
+
+* Type conversion (Python types → LLVM types)
+* Function definitions
+* Map declarations
+* Global variable initialization
+* Debug information
+
+### BPF Compilation
+
+The LLVM IR is compiled to BPF bytecode using `llc`:
+
+```bash
+llc -march=bpf -filetype=obj input.ll -o output.o
+```
+
+### Kernel Loading
+
+The compiled object is loaded using `pylibbpf`:
+
+```python
+from pylibbpf import BpfObject
+
+obj = BpfObject(path="program.o")
+obj.load()
+```
+
+## Debugging Compilation
+
+### Logging
+
+Enable debug logging to see compilation details:
+
+```python
+import logging
+from pythonbpf import BPF
+
+b = BPF(loglevel=logging.DEBUG)
+```
+
+This will show:
+* AST parsing details
+* IR generation steps
+* Compilation commands
+* Loading status
+
+### Inspecting LLVM IR
+
+Generate and inspect the IR file:
+
+```python
+from pythonbpf import compile_to_ir
+
+compile_to_ir("program.py", "program.ll")
+```
+
+Then examine `program.ll` to understand the generated code.
+
+### Using bpftool
+
+Inspect compiled objects with `bpftool`:
+
+```bash
+# Show program info
+bpftool prog show
+
+# Dump program instructions
+bpftool prog dump xlated id <ID>
+
+# Dump program JIT code
+bpftool prog dump jited id <ID>
+
+# Show maps
+bpftool map show
+
+# Dump map contents
+bpftool map dump id <ID>
+```
+
+### Verifier Errors
+
+If the kernel verifier rejects your program:
+
+* Check `dmesg` for detailed error messages:
+   ```bash
+   sudo dmesg | tail -50
+   ```
+
+## Compilation Options
+
+### Optimization Levels
+
+While PythonBPF doesn't expose optimization flags directly, you can:
+
+1. Manually compile IR with specific flags:
+   ```bash
+   llc -march=bpf -O2 -filetype=obj program.ll -o program.o
+   ```
+
+2. Modify the compilation pipeline in your code
+
+### Debug Information
+
+PythonBPF automatically generates debug information (DWARF) for:
+
+* Function names
+* Variable names
+* Type information
+
+This helps with:
+* Stack traces
+* Debugging with `bpftool`
+* Source-level debugging
+
+## Working with Compiled Objects
+
+### Loading Pre-compiled Objects
+
+You can load previously compiled objects:
+
+```python
+from pylibbpf import BpfObject
+
+# Load object file
+obj = BpfObject(path="my_program.o")
+obj.load()
+
+# Attach programs
+# (specific attachment depends on program type)
+```
+
+### Distribution
+
+Distribute compiled BPF objects:
+
+1. Compile once:
+   ```python
+   from pythonbpf import compile
+   compile(filename="program.py", output="program.o")
+   ```
+
+2. Ship `program.o` file
+
+3. Load on target systems:
+   ```python
+   from pylibbpf import BpfObject
+   obj = BpfObject(path="program.o")
+   obj.load()
+   ```
+
+### Version Compatibility
+
+BPF objects are generally compatible across kernel versions, but:
+
+* Some features require specific kernel versions
+* Helper functions may not be available on older kernels
+* BTF (BPF Type Format) requirements vary
+
+## Troubleshooting
+
+### Compilation Fails
+
+If compilation fails:
+* Check Python syntax
+* Verify all decorators are correct
+* Ensure type hints are present
+* Check for unsupported Python features
+
+### Loading Fails
+
+If loading fails:
+* Check `dmesg` for verifier errors
+* Verify LICENSE is set correctly
+* Ensure helper functions are valid
+* Check map definitions
+
+### Programs Don't Attach
+
+If attachment fails:
+* Verify section names are correct
+* Check that hooks exist on your kernel
+* Ensure you have sufficient permissions
+* Verify kernel version supports the feature
+
+## Next Steps
+
+* Learn about {doc}`helpers` for available BPF helper functions
+* Explore {doc}`maps` for data storage
+* See {doc}`decorators` for compilation markers

docs/user-guide/decorators.md

@@ -0,0 +1,448 @@
+# Decorators
+
+Decorators are the primary way to mark Python code for BPF compilation. PythonBPF provides five core decorators that control how your code is transformed into eBPF bytecode.
+
+## @bpf
+
+The `@bpf` decorator marks functions or classes for BPF compilation.
+
+### Usage
+
+```python
+from pythonbpf import bpf
+
+@bpf
+def my_function(ctx):
+    # This function will be compiled to BPF bytecode
+    pass
+```
+
+### Description
+
+Any function or class decorated with `@bpf` will be processed by the PythonBPF compiler and transformed into LLVM IR, then compiled to BPF bytecode. This is the fundamental decorator that enables BPF compilation.
+
+### Rules
+
+* Must be used on top-level functions or classes
+* The function must have proper type hints
+* Return types must be BPF-compatible
+* Only BPF-compatible operations are allowed inside
+
+### Example
+
+```python
+from pythonbpf import bpf, section
+from ctypes import c_void_p, c_int64
+
+@bpf
+@section("tracepoint/syscalls/sys_enter_execve")
+def trace_exec(ctx: c_void_p) -> c_int64:
+    print("Process started")
+    return c_int64(0)
+```
+
+## @section
+
+The `@section(name)` decorator specifies which kernel hook to attach the BPF program to.
+
+### Usage
+
+```python
+from pythonbpf import bpf, section
+
+@bpf
+@section("tracepoint/syscalls/sys_enter_open")
+def trace_open(ctx):
+    pass
+```
+
+### Section Types
+
+#### Tracepoints
+
+Tracepoints are stable kernel hooks defined in `/sys/kernel/tracing/events/`:
+
+```python
+# System call tracepoints
+@section("tracepoint/syscalls/sys_enter_execve")
+@section("tracepoint/syscalls/sys_enter_clone")
+@section("tracepoint/syscalls/sys_enter_open")
+@section("tracepoint/syscalls/sys_exit_read")
+
+# Scheduler tracepoints
+@section("tracepoint/sched/sched_process_fork")
+@section("tracepoint/sched/sched_process_exit")
+@section("tracepoint/sched/sched_switch")
+
+# Block I/O tracepoints
+@section("tracepoint/block/block_rq_insert")
+@section("tracepoint/block/block_rq_complete")
+```
+
+#### Kprobes
+
+Kprobes allow attaching to any kernel function:
+
+```python
+@section("kprobe/do_sys_open")
+def trace_sys_open(ctx):
+    pass
+
+@section("kprobe/__x64_sys_write")
+def trace_write(ctx):
+    pass
+```
+
+#### Kretprobes
+
+Kretprobes trigger when a kernel function returns:
+
+```python
+@section("kretprobe/do_sys_open")
+def trace_open_return(ctx):
+    pass
+```
+
+#### XDP (eXpress Data Path)
+
+For network packet processing at the earliest point:
+
+```python
+from pythonbpf.helper import XDP_PASS
+from ctypes import c_void_p, c_int64
+
+@section("xdp")
+def xdp_prog(ctx: c_void_p) -> c_int64:
+    # XDP_PASS, XDP_DROP, XDP_ABORTED constants available from pythonbpf.helper
+    return XDP_PASS
+```
+
+### Finding Tracepoints
+
+To find available tracepoints on your system:
+
+```bash
+# List all tracepoints
+ls /sys/kernel/tracing/events/
+
+# List syscall tracepoints
+ls /sys/kernel/tracing/events/syscalls/
+
+# View tracepoint format
+cat /sys/kernel/tracing/events/syscalls/sys_enter_open/format
+```
+
+## @map
+
+The `@map` decorator marks a function as a BPF map definition.
+
+### Usage
+
+```python
+from pythonbpf import bpf, map
+from pythonbpf.maps import HashMap
+from ctypes import c_uint32, c_uint64
+
+@bpf
+@map
+def my_map() -> HashMap:
+    return HashMap(key=c_uint32, value=c_uint64, max_entries=1024)
+```
+
+### Description
+
+Maps are BPF data structures used to:
+
+* Store state between BPF program invocations
+* Communicate data between BPF programs
+* Share data with userspace
+
+The function must return a map type (HashMap, PerfEventArray, RingBuffer) and the return type must be annotated.
+
+### Example
+
+```python
+from pythonbpf import bpf, map, section
+from pythonbpf.maps import HashMap
+from pythonbpf.helper import pid
+from ctypes import c_void_p, c_int64, c_uint32, c_uint64
+
+@bpf
+@map
+def process_count() -> HashMap:
+    return HashMap(key=c_uint32, value=c_uint64, max_entries=4096)
+
+@bpf
+@section("tracepoint/syscalls/sys_enter_clone")
+def count_clones(ctx: c_void_p) -> c_int64:
+    process_id = pid()
+    count = process_count.lookup(process_id)
+    if count:
+        process_count.update(process_id, count + 1)
+    else:
+        process_count.update(process_id, c_uint64(1))
+    return 0
+```
+
+See {doc}`maps` for more details on available map types.
+
+## @struct
+
+The `@struct` decorator marks a class as a BPF struct definition.
+
+### Usage
+
+```python
+from pythonbpf import bpf, struct
+from ctypes import c_uint64, c_uint32
+
+@bpf
+@struct
+class Event:
+    timestamp: c_uint64
+    pid: c_uint32
+    cpu: c_uint32
+```
+
+### Description
+
+Structs allow you to define custom data types for use in BPF programs. They can be used:
+
+* As map keys and values
+* For perf event output
+* In ring buffer submissions
+* As local variables
+
+### Field Types
+
+Supported field types include:
+
+* **Integer types**: `c_int8`, `c_int16`, `c_int32`, `c_int64`, `c_uint8`, `c_uint16`, `c_uint32`, `c_uint64`
+* **Pointers**: `c_void_p`, `c_char_p`
+* **Fixed strings**: `str(N)` where N is the size (e.g., `str(16)`)
+* **Nested structs**: Other `@struct` decorated classes
+
+### Example
+
+```python
+from pythonbpf import bpf, struct, map, section
+from pythonbpf.maps import RingBuffer
+from pythonbpf.helper import pid, ktime
+from ctypes import c_void_p, c_int64, c_uint64, c_uint32
+
+@bpf
+@struct
+class ProcessEvent:
+    timestamp: c_uint64
+    pid: c_uint32
+    comm: str(16)
+
+@bpf
+@map
+def events() -> RingBuffer:
+    return RingBuffer(max_entries=4096)
+
+@bpf
+@section("tracepoint/syscalls/sys_enter_execve")
+def track_processes(ctx: c_void_p) -> c_int64:
+    event = ProcessEvent()
+    event.timestamp = ktime()
+    event.pid = pid()
+    comm(event.comm)  # Fills event.comm with process name
+
+    events.output(event)
+    return 0
+```
+
+See {doc}`structs` for more details on working with structs.
+
+## @bpfglobal
+
+The `@bpfglobal` decorator marks a function as a BPF global variable definition.
+
+### Usage
+
+```python
+from pythonbpf import bpf, bpfglobal
+
+@bpf
+@bpfglobal
+def LICENSE() -> str:
+    return "GPL"
+```
+
+### Description
+
+BPF global variables are values that:
+
+* Are initialized when the program loads
+* Can be read by all BPF functions
+* Must be constant (cannot be modified at runtime in current implementation)
+
+### Common Global Variables
+
+#### LICENSE (Required)
+
+Every BPF program must declare a license:
+
+```python
+@bpf
+@bpfglobal
+def LICENSE() -> str:
+    return "GPL"
+```
+
+Valid licenses include:
+* `"GPL"` - GNU General Public License
+* `"GPL v2"` - GPL version 2
+* `"Dual BSD/GPL"` - Dual licensed
+* `"Dual MIT/GPL"` - Dual licensed
+
+```{warning}
+Many BPF features require a GPL-compatible license. Using a non-GPL license may prevent your program from loading or accessing certain kernel features.
+```
+
+#### Custom Global Variables
+
+You can define other global variables:
+
+```python
+@bpf
+@bpfglobal
+def DEBUG_MODE() -> int:
+    return 1
+
+@bpf
+@bpfglobal
+def MAX_EVENTS() -> int:
+    return 1000
+```
+
+These can be referenced in your BPF functions, though modifying them at runtime is currently not supported.
+
+## Combining Decorators
+
+Decorators are often used together. The order matters:
+
+### Correct Order
+
+```python
+@bpf              # Always first
+@section("...")   # Section before other decorators
+def my_function():
+    pass
+
+@bpf              # Always first
+@map              # Map/struct/bpfglobal after @bpf
+def my_map():
+    pass
+
+@bpf              # Always first
+@struct           # Map/struct/bpfglobal after @bpf
+class MyStruct:
+    pass
+
+@bpf              # Always first
+@bpfglobal        # Map/struct/bpfglobal after @bpf
+def LICENSE():
+    return "GPL"
+```
+
+### Examples by Use Case
+
+#### Simple Tracepoint
+
+```python
+@bpf
+@section("tracepoint/syscalls/sys_enter_open")
+def trace_open(ctx: c_void_p) -> c_int64:
+    return c_int64(0)
+```
+
+#### Map Definition
+
+```python
+@bpf
+@map
+def counters() -> HashMap:
+    return HashMap(key=c_uint32, value=c_uint64, max_entries=256)
+```
+
+#### Struct Definition
+
+```python
+@bpf
+@struct
+class Event:
+    timestamp: c_uint64
+    value: c_uint32
+```
+
+#### Global Variable
+
+```python
+@bpf
+@bpfglobal
+def LICENSE() -> str:
+    return "GPL"
+```
+
+## Best Practices
+
+1. **Always use @bpf first** - It must be the outermost decorator
+2. **Provide type hints** - Required for proper code generation
+3. **Test incrementally** - Verify each component works before combining
+
+## Common Errors
+
+### Missing @bpf Decorator
+
+```python
+# Wrong - missing @bpf
+@section("tracepoint/syscalls/sys_enter_open")
+def my_func(ctx):
+    pass
+
+# Correct
+@bpf
+@section("tracepoint/syscalls/sys_enter_open")
+def my_func(ctx):
+    pass
+```
+
+### Wrong Decorator Order
+
+```python
+# Wrong - @section before @bpf
+@section("tracepoint/syscalls/sys_enter_open")
+@bpf
+def my_func(ctx):
+    pass
+
+# Correct
+@bpf
+@section("tracepoint/syscalls/sys_enter_open")
+def my_func(ctx):
+    pass
+```
+
+### Missing Type Hints
+
+```python
+# Wrong - no type hints
+@bpf
+def my_func(ctx):
+    pass
+
+# Correct
+@bpf
+def my_func(ctx: c_void_p) -> c_int64:
+    pass
+```
+
+## Next Steps
+
+* Learn about {doc}`maps` for data storage and communication
+* Explore {doc}`structs` for defining custom data types
+* Understand {doc}`compilation` to see how code is transformed
+* Check out {doc}`helpers` for available BPF helper functions

docs/user-guide/helpers.md

@@ -0,0 +1,503 @@
+# Helper Functions and Utilities
+
+PythonBPF provides helper functions and utilities for BPF programs and userspace code.
+
+```{note}
+**Work in Progress:** PythonBPF is under active development. We are constantly adding support for more helpers, kfuncs, and map types. Check back for updates!
+```
+For comprehensive documentation on BPF helpers, see the [eBPF Helper Functions documentation on ebpf.io](https://ebpf.io/what-is-ebpf/#helper-calls).
+
+## BPF Helper Functions
+
+BPF helper functions are kernel-provided functions that BPF programs can call to interact with the system. PythonBPF exposes these through the `pythonbpf.helper` module.
+
+```python
+from pythonbpf.helper import pid, ktime, comm
+```
+
+### Process and Task Information
+
+#### pid()
+
+Get the current process ID.
+
+> **Linux Kernel Helper:** `bpf_get_current_pid_tgid()`
+
+```python
+from pythonbpf.helper import pid
+
+@bpf
+@section("tracepoint/syscalls/sys_enter_open")
+def trace_open(ctx: c_void_p) -> c_int64:
+    process_id = pid()
+    print(f"Process {process_id} opened a file")
+    return 0
+```
+
+**Returns:** `c_int32` - The process ID of the current task
+
+#### comm()
+
+Get the current process command name.
+
+> **Linux Kernel Helper:** `bpf_get_current_comm()`
+
+**Parameters:**
+* `buf` - Buffer to fill with the process command name
+
+**Returns:** `c_int64` - 0 on success, negative on error
+
+#### uid()
+
+Get the current user ID.
+
+> **Linux Kernel Helper:** `bpf_get_current_uid_gid()`
+
+```python
+from pythonbpf.helper import uid
+
+@bpf
+@section("tracepoint/syscalls/sys_enter_open")
+def trace_open(ctx: c_void_p) -> c_int64:
+    user_id = uid()
+    if user_id == 0:
+        print("Root user opened a file")
+    return 0
+```
+
+**Returns:** `c_int32` - The user ID of the current task
+
+### Time and Timing
+
+#### ktime()
+
+Get the current kernel time in nanoseconds since system boot.
+
+> **Linux Kernel Helper:** `bpf_ktime_get_ns()`
+
+```python
+from pythonbpf.helper import ktime
+
+@bpf
+@section("tracepoint/syscalls/sys_enter_read")
+def measure_latency(ctx: c_void_p) -> c_int64:
+    start_time = ktime()
+    # Store for later comparison
+    return 0
+```
+
+**Returns:** `c_int64` - Current time in nanoseconds
+
+**Use cases:**
+* Measuring latency
+* Timestamping events
+* Rate limiting
+* Timeout detection
+
+### CPU Information
+
+#### smp_processor_id()
+
+Get the ID of the CPU on which the BPF program is running.
+
+> **Linux Kernel Helper:** `bpf_get_smp_processor_id()`
+
+```python
+from pythonbpf.helper import smp_processor_id
+
+@bpf
+@section("tracepoint/sched/sched_switch")
+def track_cpu(ctx: c_void_p) -> c_int64:
+    cpu = smp_processor_id()
+    print(f"Running on CPU {cpu}")
+    return 0
+```
+
+**Returns:** `c_int32` - The current CPU ID
+
+**Use cases:**
+* Per-CPU statistics
+* Load balancing analysis
+* CPU affinity tracking
+
+### Memory Operations
+
+#### probe_read()
+
+Safely read data from kernel memory.
+
+> **Linux Kernel Helper:** `bpf_probe_read()`
+
+```python
+from pythonbpf.helper import probe_read
+
+@bpf
+def read_kernel_data(ctx: c_void_p) -> c_int64:
+    dst = 0
+    size = 8
+    src = ctx  # kernel address
+
+    result = probe_read(dst, size, src)
+    if result == 0:
+        print(f"Read value: {dst}")
+    return 0
+```
+
+**Parameters:**
+* `dst` - Destination buffer
+* `size` - Number of bytes to read
+* `src` - Source kernel address
+
+**Returns:** `c_int64` - 0 on success, negative on error
+
+**Safety:** This function performs bounds checking and prevents invalid memory access.
+
+#### probe_read_str()
+
+Safely read a null-terminated string from kernel memory.
+
+> **Linux Kernel Helper:** `bpf_probe_read_str()`
+
+**Parameters:**
+* `dst` - Destination buffer (string)
+* `src` - Source kernel address
+
+**Returns:** `c_int64` - Length of string on success, negative on error
+
+### Random Numbers
+
+#### random()
+
+Generate a pseudo-random 32-bit number.
+
+> **Linux Kernel Helper:** `bpf_get_prandom_u32()`
+
+```python
+from pythonbpf.helper import random
+
+@bpf
+@section("tracepoint/syscalls/sys_enter_open")
+def sample_events(ctx: c_void_p) -> c_int64:
+    # Sample 1% of events
+    if (random() % 100) == 0:
+        print("Sampled event")
+    return 0
+```
+
+**Returns:** `c_int32` - A pseudo-random number
+
+### Network Helpers
+
+#### skb_store_bytes()
+
+Store bytes into a socket buffer (for network programs).
+
+> **Linux Kernel Helper:** `bpf_skb_store_bytes()`
+
+```python
+from pythonbpf.helper import skb_store_bytes
+
+@bpf
+@section("classifier")
+def modify_packet(ctx: c_void_p) -> c_int32:
+    offset = 14  # Skip Ethernet header
+    data = b"\x00\x01\x02\x03"
+    size = len(data)
+
+    result = skb_store_bytes(offset, data, size)
+    return 0
+```
+
+**Parameters:**
+* `offset` - Offset in the socket buffer
+* `from_buf` - Data to write
+* `size` - Number of bytes to write
+* `flags` - Optional flags
+
+**Returns:** `c_int64` - 0 on success, negative on error
+
+## Userspace Utilities
+
+PythonBPF provides utilities for working with BPF programs from Python userspace code.
+
+### trace_pipe()
+
+Read and display output from the kernel trace pipe.
+
+```python
+from pythonbpf import trace_pipe
+
+# After loading and attaching BPF programs
+trace_pipe()
+```
+
+**Description:**
+
+The `trace_pipe()` function reads from `/sys/kernel/tracing/trace_pipe` and displays BPF program output to stdout. This is the output from `print()` statements in BPF programs.
+
+**Usage:**
+
+```python
+from pythonbpf import bpf, section, bpfglobal, BPF, trace_pipe
+from ctypes import c_void_p, c_int64
+
+@bpf
+@section("tracepoint/syscalls/sys_enter_execve")
+def trace_exec(ctx: c_void_p) -> c_int64:
+    print("Process started")  # This goes to trace_pipe
+    return 0
+
+@bpf
+@bpfglobal
+def LICENSE() -> str:
+    return "GPL"
+
+b = BPF()
+b.load_and_attach()
+trace_pipe()  # Display BPF output
+```
+
+**Behavior:**
+
+* Blocks until Ctrl+C is pressed
+* Displays output in real-time
+* Shows task name, PID, CPU, timestamp, and message
+* Automatically handles trace pipe access errors
+
+**Requirements:**
+
+* Root or sudo access
+* Accessible `/sys/kernel/tracing/trace_pipe`
+
+### trace_fields()
+
+Parse one line from the trace pipe into structured fields.
+
+```python
+from pythonbpf import trace_fields
+
+# Read and parse trace output
+task, pid, cpu, flags, ts, msg = trace_fields()
+print(f"Task: {task}, PID: {pid}, CPU: {cpu}, Time: {ts}, Message: {msg}")
+```
+
+**Returns:** Tuple of `(task, pid, cpu, flags, timestamp, message)`
+
+* `task` - String: Task/process name (up to 16 chars)
+* `pid` - Integer: Process ID
+* `cpu` - Integer: CPU number
+* `flags` - Bytes: Trace flags
+* `timestamp` - Float: Timestamp in seconds
+* `message` - String: The actual trace message
+
+**Description:**
+
+The `trace_fields()` function reads one line from the trace pipe and parses it into individual fields. This is useful when you need programmatic access to trace data rather than just displaying it.
+
+**Usage:**
+
+```python
+from pythonbpf import bpf, section, bpfglobal, BPF, trace_fields
+from ctypes import c_void_p, c_int64
+
+@bpf
+@section("tracepoint/syscalls/sys_enter_execve")
+def trace_exec(ctx: c_void_p) -> c_int64:
+    print(f"PID:{pid()}")
+    return 0
+
+@bpf
+@bpfglobal
+def LICENSE() -> str:
+    return "GPL"
+
+b = BPF()
+b.load_and_attach()
+
+# Process trace events
+try:
+    while True:
+        task, pid, cpu, flags, ts, msg = trace_fields()
+        print(f"[{ts:.6f}] {task}({pid}) on CPU{cpu}: {msg}")
+except KeyboardInterrupt:
+    print("Stopped")
+```
+
+**Error Handling:**
+
+* Raises `ValueError` if line cannot be parsed
+* Skips lines about lost events
+* Blocks waiting for next line
+
+## Helper Function Examples
+
+### Example 1: Latency Measurement
+
+```python
+from pythonbpf import bpf, map, section, bpfglobal, BPF, trace_pipe
+from pythonbpf.maps import HashMap
+from pythonbpf.helper import pid, ktime
+from ctypes import c_void_p, c_int64, c_uint32, c_uint64
+
+@bpf
+@map
+def start_times() -> HashMap:
+    return HashMap(key=c_uint32, value=c_uint64, max_entries=4096)
+
+@bpf
+@section("tracepoint/syscalls/sys_enter_read")
+def read_start(ctx: c_void_p) -> c_int64:
+    process_id = pid()
+    start = ktime()
+    start_times.update(process_id, start)
+    return 0
+
+@bpf
+@section("tracepoint/syscalls/sys_exit_read")
+def read_end(ctx: c_void_p) -> c_int64:
+    process_id = pid()
+    start = start_times.lookup(process_id)
+
+    if start:
+        latency = ktime() - start
+        print(f"Read latency: {latency} ns")
+        start_times.delete(process_id)
+
+    return 0
+
+@bpf
+@bpfglobal
+def LICENSE() -> str:
+    return "GPL"
+
+b = BPF()
+b.load_and_attach()
+trace_pipe()
+```
+
+### Example 2: Process Tracking
+
+```python
+from pythonbpf import bpf, section, bpfglobal, BPF, trace_pipe
+from pythonbpf.helper import pid, uid
+from ctypes import c_void_p, c_int64
+
+@bpf
+@section("tracepoint/syscalls/sys_enter_execve")
+def track_exec(ctx: c_void_p) -> c_int64:
+    process_id = pid()
+    user_id = uid()
+
+    print(f"User {user_id} started process (PID: {process_id})")
+    return 0
+
+@bpf
+@bpfglobal
+def LICENSE() -> str:
+    return "GPL"
+
+b = BPF()
+b.load_and_attach()
+trace_pipe()
+```
+
+### Example 3: CPU Load Monitoring
+
+```python
+from pythonbpf import bpf, map, section, bpfglobal, BPF
+from pythonbpf.maps import HashMap
+from pythonbpf.helper import smp_processor_id
+from ctypes import c_void_p, c_int64, c_uint32, c_uint64
+
+@bpf
+@map
+def cpu_counts() -> HashMap:
+    return HashMap(key=c_uint32, value=c_uint64, max_entries=256)
+
+@bpf
+@section("tracepoint/sched/sched_switch")
+def count_switches(ctx: c_void_p) -> c_int64:
+    cpu = smp_processor_id()
+    count = cpu_counts.lookup(cpu)
+
+    if count:
+        cpu_counts.update(cpu, count + 1)
+    else:
+        cpu_counts.update(cpu, 1)
+
+    return 0
+
+@bpf
+@bpfglobal
+def LICENSE() -> str:
+    return "GPL"
+
+b = BPF()
+b.load_and_attach()
+
+import time
+time.sleep(5)
+
+# Read results
+from pylibbpf import BpfMap
+map_obj = BpfMap(b, cpu_counts)
+for cpu, count in map_obj.items():
+    print(f"CPU {cpu}: {count} context switches")
+```
+
+### Example 4: Event Sampling
+
+```python
+from pythonbpf import bpf, section, bpfglobal, BPF, trace_pipe
+from pythonbpf.helper import random, pid
+from ctypes import c_void_p, c_int64
+
+@bpf
+@section("tracepoint/syscalls/sys_enter_open")
+def sample_opens(ctx: c_void_p) -> c_int64:
+    # Sample 5% of events
+    if (random() % 100) < 5:
+        process_id = pid()
+        print(f"Sampled: PID {process_id} opening file")
+
+    return 0
+
+@bpf
+@bpfglobal
+def LICENSE() -> str:
+    return "GPL"
+
+b = BPF()
+b.load_and_attach()
+trace_pipe()
+```
+
+## Troubleshooting
+
+### Helper Not Available
+
+If a helper function doesn't work:
+* Check your kernel version (some helpers are newer)
+* Ensure your LICENSE is GPL-compatible
+
+### Trace Pipe Access Denied
+
+If `trace_pipe()` fails:
+* Run with sudo/root
+* Check `/sys/kernel/tracing/` is accessible
+* Verify tracing is enabled in kernel config
+
+## Examples
+
+Check out these examples in the `BCC-Examples/` directory that demonstrate helper functions:
+
+* [hello_world.py](https://github.com/pythonbpf/Python-BPF/blob/main/BCC-Examples/hello_world.py) - Basic tracing with `print()`
+* [sync_timing.py](https://github.com/pythonbpf/Python-BPF/blob/main/BCC-Examples/sync_timing.py) - Using `ktime()` for timing measurements
+* [hello_perf_output.py](https://github.com/pythonbpf/Python-BPF/blob/main/BCC-Examples/hello_perf_output.py) - Using `pid()`, `ktime()`, and `comm()` with perf events
+* [vfsreadlat.py](https://github.com/pythonbpf/Python-BPF/blob/main/BCC-Examples/vfsreadlat.py) - Latency measurement with `ktime()` in kprobes
+
+## Next Steps
+
+* Explore {doc}`maps` for data storage with helpers
+* Learn about {doc}`compilation` to understand helper implementation
+* See {doc}`decorators` for marking BPF functions

docs/user-guide/index.md

@@ -0,0 +1,87 @@
+# User Guide
+
+This user guide provides comprehensive documentation for all PythonBPF features. Whether you're building simple tracing tools or complex performance monitoring systems, this guide will help you master PythonBPF.
+
+## Overview
+
+PythonBPF transforms Python code into eBPF bytecode that runs in the Linux kernel. It provides a Pythonic interface to eBPF features through decorators, type annotations, and familiar programming patterns.
+
+## Core Concepts
+
+### Decorators
+
+PythonBPF uses decorators to mark code for BPF compilation:
+
+* `@bpf` - Mark functions and classes for BPF compilation
+* `@map` - Define BPF maps for data storage
+* `@struct` - Define custom data structures
+* `@section(name)` - Specify attachment points
+* `@bpfglobal` - Define global variables
+
+### Compilation Pipeline
+
+Your Python code goes through several stages:
+
+1. **IR Generation** - The Python AST is transformed into LLVM IR using llvmlite
+2. **BPF Compilation** - LLVM IR is compiled to BPF bytecode using `llc`
+3. **Loading** - The BPF object is loaded into the kernel using libbpf
+4. **Attachment** - Programs are attached to kernel hooks (tracepoints, kprobes, etc.)
+
+## Code Organization
+
+When writing BPF programs with PythonBPF, we recommend:
+
+1. **Use type hints** - Required for proper code generation
+2. **Test incrementally** - Verify each component works before adding complexity
+
+## Type System
+
+PythonBPF uses Python's `ctypes` module for type definitions:
+
+* `c_int8`, `c_int16`, `c_int32`, `c_int64` - Signed integers
+* `c_uint8`, `c_uint16`, `c_uint32`, `c_uint64` - Unsigned integers
+* `c_char`, `c_bool` - Characters and booleans
+* `c_void_p` - Void pointers
+* `str(N)` - Fixed-length strings (e.g., `str(16)` for 16-byte string)
+
+## Example Structure
+
+A typical PythonBPF program follows this structure:
+
+```python
+from pythonbpf import bpf, map, section, bpfglobal, BPF, compile
+from pythonbpf.maps import HashMap
+from ctypes import c_void_p, c_int64, c_uint32
+
+# Define maps
+@bpf
+@map
+def my_map() -> HashMap:
+    return HashMap(key=c_uint32, value=c_uint64, max_entries=1024)
+
+# Define BPF function
+@bpf
+@section("tracepoint/...")
+def my_function(ctx: c_void_p) -> c_int64:
+    # BPF logic here
+    return 0
+
+# License (required)
+@bpf
+@bpfglobal
+def LICENSE() -> str:
+    return "GPL"
+
+# Compile, load, and run
+if __name__ == "__main__":
+    b = BPF()
+    b.load_and_attach()
+    # Use the program...
+
+# Or, compile to an object file
+compile()
+```
+
+## Next Steps
+
+Start with {doc}`decorators` to learn about all available decorators, then explore the other sections to master specific features.

docs/user-guide/maps.md

@@ -0,0 +1,476 @@
+# BPF Maps
+
+Maps are BPF data structures that provide storage and communication mechanisms. They allow BPF programs to:
+
+* Store state between invocations
+* Share data between multiple BPF programs
+* Communicate with userspace applications
+
+```{note}
+**Work in Progress:** PythonBPF is under active development. We are constantly adding support for more map types, helpers, and kfuncs. Check back for updates!
+```
+For comprehensive documentation on BPF maps, see the [eBPF Maps documentation on ebpf.io](https://ebpf.io/what-is-ebpf/#maps).
+
+## Map Types
+
+PythonBPF supports several map types, each optimized for different use cases.
+
+### HashMap
+
+Hash maps provide efficient key-value storage with O(1) lookup time.
+
+> **Linux Kernel Map Type:** `BPF_MAP_TYPE_HASH`
+
+#### Definition
+
+```python
+from pythonbpf import bpf, map
+from pythonbpf.maps import HashMap
+from ctypes import c_uint32, c_uint64
+
+@bpf
+@map
+def my_map() -> HashMap:
+    return HashMap(
+        key=c_uint32,
+        value=c_uint64,
+        max_entries=1024
+    )
+```
+
+#### Parameters
+
+* `key` - The type of the key (must be a ctypes type or struct)
+* `value` - The type of the value (must be a ctypes type or struct)
+* `max_entries` - Maximum number of entries the map can hold
+
+#### Operations
+
+##### lookup(key)
+
+Look up a value by key. Returns the value if found, `None` otherwise.
+
+```python
+@bpf
+@section("tracepoint/syscalls/sys_enter_open")
+def trace_open(ctx: c_void_p) -> c_int64:
+    value = my_map.lookup(1)
+    if value:
+        print(f"Found value: {value}")
+    return 0
+```
+
+##### update(key, value, flags=None)
+
+Update or insert a key-value pair.
+
+```python
+@bpf
+@section("tracepoint/syscalls/sys_enter_open")
+def track_opens(ctx: c_void_p) -> c_int64:
+    key = pid()
+    count = my_map.lookup(key)
+    if count:
+        my_map.update(key, count + 1)
+    else:
+        my_map.update(key, 1)
+    return 0
+```
+
+##### delete(key)
+
+Remove an entry from the map.
+
+```python
+@bpf
+def cleanup(ctx: c_void_p) -> c_int64:
+    my_map.delete(1)
+    return 0
+```
+
+#### Use Cases
+
+* Counting events per process/CPU
+* Storing timestamps for latency calculations
+* Caching lookup results
+* Implementing rate limiters
+
+#### Example: Process Counter
+
+```python
+from pythonbpf import bpf, map, section, bpfglobal, BPF
+from pythonbpf.maps import HashMap
+from pythonbpf.helper import pid
+from ctypes import c_void_p, c_int64, c_uint32, c_uint64
+
+@bpf
+@map
+def process_count() -> HashMap:
+    return HashMap(key=c_uint32, value=c_uint64, max_entries=4096)
+
+@bpf
+@section("tracepoint/syscalls/sys_enter_clone")
+def count_processes(ctx: c_void_p) -> c_int64:
+    process_id = pid()
+    count = process_count.lookup(process_id)
+
+    if count:
+        new_count = count + 1
+        process_count.update(process_id, new_count)
+    else:
+        process_count.update(process_id, 1)
+
+    return 0
+
+@bpf
+@bpfglobal
+def LICENSE() -> str:
+    return "GPL"
+
+if __name__ == "__main__":
+    b = BPF()
+    b.load_and_attach()
+    # Access map from userspace
+    from pylibbpf import BpfMap
+    map_obj = BpfMap(b, process_count)
+    # Read values...
+```
+
+### PerfEventArray
+
+Perf event arrays are used to send data from BPF programs to userspace with high throughput.
+
+> **Linux Kernel Map Type:** `BPF_MAP_TYPE_PERF_EVENT_ARRAY`
+
+#### Definition
+
+```python
+from pythonbpf.maps import PerfEventArray
+
+@bpf
+@map
+def events() -> PerfEventArray:
+    return PerfEventArray(
+        key_size=c_uint32,
+        value_size=c_uint32
+    )
+```
+
+#### Parameters
+
+* `key_size` - Type for the key (typically `c_uint32`)
+* `value_size` - Type for the value (typically `c_uint32`)
+
+#### Operations
+
+##### output(data)
+
+Send data to userspace. The data can be a struct or basic type.
+
+```python
+@bpf
+@struct
+class Event:
+    pid: c_uint32
+    timestamp: c_uint64
+
+@bpf
+@map
+def events() -> PerfEventArray:
+    return PerfEventArray(key_size=c_uint32, value_size=c_uint32)
+
+@bpf
+@section("tracepoint/syscalls/sys_enter_execve")
+def send_event(ctx: c_void_p) -> c_int64:
+    event = Event()
+    event.pid = pid()
+    event.timestamp = ktime()
+    events.output(event)
+    return 0
+```
+
+#### Use Cases
+
+* Sending detailed event data to userspace
+* Real-time monitoring and alerting
+* Collecting samples for analysis
+* High-throughput data collection
+
+#### Example: Event Logging
+
+```python
+from pythonbpf import bpf, map, struct, section, bpfglobal, BPF
+from pythonbpf.maps import PerfEventArray
+from pythonbpf.helper import pid, ktime, comm
+from ctypes import c_void_p, c_int64, c_uint32, c_uint64
+
+@bpf
+@struct
+class ProcessEvent:
+    timestamp: c_uint64
+    pid: c_uint32
+    comm: str(16)
+
+@bpf
+@map
+def events() -> PerfEventArray:
+    return PerfEventArray(key_size=c_uint32, value_size=c_uint32)
+
+@bpf
+@section("tracepoint/syscalls/sys_enter_execve")
+def log_exec(ctx: c_void_p) -> c_int64:
+    event = ProcessEvent()
+    event.timestamp = ktime()
+    event.pid = pid()
+    comm(event.comm)  # Fills event.comm with process name
+    events.output(event)
+    return 0
+
+@bpf
+@bpfglobal
+def LICENSE() -> str:
+    return "GPL"
+```
+
+### RingBuffer
+
+Ring buffers provide efficient, ordered event delivery with lower overhead than perf event arrays.
+
+> **Linux Kernel Map Type:** `BPF_MAP_TYPE_RINGBUF`
+
+#### Definition
+
+```python
+from pythonbpf.maps import RingBuffer
+
+@bpf
+@map
+def events() -> RingBuffer:
+    return RingBuffer(max_entries=4096)
+```
+
+#### Parameters
+
+* `max_entries` - Maximum size of the ring buffer in bytes (must be power of 2)
+
+#### Operations
+
+##### output(data, flags=0)
+
+Send data to the ring buffer.
+
+```python
+@bpf
+@section("tracepoint/syscalls/sys_enter_open")
+def log_event(ctx: c_void_p) -> c_int64:
+    event = Event()
+    event.pid = pid()
+    events.output(event)
+    return 0
+```
+
+##### reserve(size)
+
+Reserve space in the ring buffer. Returns a pointer to the reserved space or 0 if no space available.
+
+```python
+@bpf
+def reserve_space(ctx: c_void_p) -> c_int64:
+    ptr = events.reserve(64)  # Reserve 64 bytes
+    if ptr:
+        # Use the reserved space
+        events.submit(ptr)
+    return 0
+```
+
+##### submit(data, flags=0)
+
+Submit previously reserved space.
+
+##### discard(data, flags=0)
+
+Discard previously reserved space without submitting.
+
+#### Use Cases
+
+* Modern event streaming (preferred over PerfEventArray)
+* Lower overhead event delivery
+* Ordered event processing
+* Kernel 5.8+ systems
+
+#### Advantages over PerfEventArray
+
+* Lower memory overhead
+* Better performance
+* Simpler API
+* Ordered delivery guarantees
+
+### BPFMapType Enum
+
+PythonBPF supports various BPF map types through the `BPFMapType` enum:
+
+```python
+from pythonbpf.maps import BPFMapType
+
+# Common map types
+BPFMapType.BPF_MAP_TYPE_HASH          # Hash map
+BPFMapType.BPF_MAP_TYPE_ARRAY         # Array map
+BPFMapType.BPF_MAP_TYPE_PERF_EVENT_ARRAY  # Perf event array
+BPFMapType.BPF_MAP_TYPE_RINGBUF       # Ring buffer
+BPFMapType.BPF_MAP_TYPE_STACK_TRACE   # Stack trace storage
+BPFMapType.BPF_MAP_TYPE_LRU_HASH      # LRU hash map
+```
+
+## Using Maps with Structs
+
+Maps can store complex data types using structs as values:
+
+```python
+from pythonbpf import bpf, map, struct, section
+from pythonbpf.maps import HashMap
+from ctypes import c_uint32, c_uint64
+
+@bpf
+@struct
+class Stats:
+    count: c_uint64
+    total_time: c_uint64
+    max_time: c_uint64
+
+@bpf
+@map
+def process_stats() -> HashMap:
+    return HashMap(
+        key=c_uint32,      # PID as key
+        value=Stats,        # Struct as value
+        max_entries=1024
+    )
+
+@bpf
+@section("tracepoint/syscalls/sys_enter_read")
+def track_stats(ctx: c_void_p) -> c_int64:
+    process_id = pid()
+    stats = process_stats.lookup(process_id)
+
+    if stats:
+        stats.count = stats.count + 1
+        process_stats.update(process_id, stats)
+    else:
+        new_stats = Stats()
+        new_stats.count = 1
+        new_stats.total_time = 0
+        new_stats.max_time = 0
+        process_stats.update(process_id, new_stats)
+
+    return 0
+```
+
+## Accessing Maps from Userspace
+
+After loading a BPF program, you can access maps from Python using `pylibbpf`:
+
+```python
+from pythonbpf import BPF
+from pylibbpf import BpfMap
+
+# Load BPF program
+b = BPF()
+b.load_and_attach()
+
+# Get map reference
+map_obj = BpfMap(b, my_map)
+
+# Read all key-value pairs
+for key, value in map_obj.items():
+    print(f"Key: {key}, Value: {value}")
+
+# Get all keys
+keys = list(map_obj.keys())
+
+# Get all values
+values = list(map_obj.values())
+
+# Lookup specific key
+value = map_obj[key]
+
+# Update from userspace
+map_obj[key] = new_value
+
+# Delete from userspace
+del map_obj[key]
+```
+
+## Common Patterns
+
+### Counter Pattern
+
+```python
+count = my_map.lookup(key)
+if count:
+    my_map.update(key, count + 1)
+else:
+    my_map.update(key, 1)
+```
+
+### Latency Tracking
+
+```python
+# Store start time
+start = ktime()
+start_map.update(key, start)
+
+# Later: calculate latency
+start_time = start_map.lookup(key)
+if start_time:
+    latency = ktime() - start_time
+    latency_map.update(key, latency)
+    start_map.delete(key)
+```
+
+### Event Sampling
+
+```python
+# Only process every Nth event
+count = counter.lookup(key)
+if count and (count % 100) == 0:
+    events.output(data)
+counter.update(key, count + 1 if count else 1)
+```
+
+## Troubleshooting
+
+### Map Not Found
+
+If you get "map not found" errors:
+* Ensure the map is defined with `@bpf` and `@map`
+* Check that the map name matches exactly
+* Verify the BPF program loaded successfully
+
+### Map Full
+
+If updates fail due to map being full:
+* Increase `max_entries`
+* Use LRU maps for automatic eviction
+* Add cleanup logic to delete old entries
+
+### Type Errors
+
+If you get type-related errors:
+* Verify key and value types match the definition
+* Check that structs are properly defined
+
+## Examples
+
+Check out these examples in the `BCC-Examples/` directory that demonstrate map usage:
+
+* [sync_timing.py](https://github.com/pythonbpf/Python-BPF/blob/main/BCC-Examples/sync_timing.py) - HashMap for storing timestamps
+* [sync_count.py](https://github.com/pythonbpf/Python-BPF/blob/main/BCC-Examples/sync_count.py) - HashMap for counting events
+* [hello_perf_output.py](https://github.com/pythonbpf/Python-BPF/blob/main/BCC-Examples/hello_perf_output.py) - PerfEventArray for sending structs to userspace
+* [sync_perf_output.py](https://github.com/pythonbpf/Python-BPF/blob/main/BCC-Examples/sync_perf_output.py) - PerfEventArray with timing data
+* [disksnoop.py](https://github.com/pythonbpf/Python-BPF/blob/main/BCC-Examples/disksnoop.py) - HashMap for tracking disk I/O
+
+## Next Steps
+
+* Learn about {doc}`structs` for defining custom value types
+* Explore {doc}`helpers` for BPF helper functions
+* See {doc}`compilation` to understand how maps are compiled

docs/user-guide/structs.md

@@ -0,0 +1,413 @@
+# BPF Structs
+
+Structs allow you to define custom data types for use in BPF programs. They provide a way to group related fields together and can be used as map values, event payloads, or local variables.
+
+## Defining Structs
+
+Use the `@bpf` and `@struct` decorators to define a BPF struct:
+
+```python
+from pythonbpf import bpf, struct
+from ctypes import c_uint64, c_uint32
+
+@bpf
+@struct
+class Event:
+    timestamp: c_uint64
+    pid: c_uint32
+    cpu: c_uint32
+```
+
+## Field Types
+
+Structs support various field types from Python's `ctypes` module.
+
+### Integer Types
+
+```python
+from ctypes import (
+    c_int8, c_int16, c_int32, c_int64,
+    c_uint8, c_uint16, c_uint32, c_uint64
+)
+
+@bpf
+@struct
+class Numbers:
+    small_int: c_int8      # -128 to 127
+    short_int: c_int16     # -32768 to 32767
+    int_val: c_int32       # -2^31 to 2^31-1
+    long_int: c_int64      # -2^63 to 2^63-1
+
+    byte: c_uint8          # 0 to 255
+    word: c_uint16         # 0 to 65535
+    dword: c_uint32        # 0 to 2^32-1
+    qword: c_uint64        # 0 to 2^64-1
+```
+
+### String Types
+
+Fixed-length strings are defined using `str(N)` where N is the size:
+
+```python
+@bpf
+@struct
+class ProcessInfo:
+    name: str(16)      # 16-byte string
+    path: str(256)     # 256-byte string
+```
+
+```{note}
+Strings in BPF are fixed-length and null-terminated. The size includes the null terminator.
+```
+
+### Pointer Types
+
+```python
+from ctypes import c_void_p, c_char_p
+
+@bpf
+@struct
+class Pointers:
+    ptr: c_void_p      # Generic pointer
+    str_ptr: c_char_p  # Character pointer
+```
+
+### Nested Structs
+
+Structs can contain other structs as fields:
+
+```python
+@bpf
+@struct
+class Address:
+    street: str(64)
+    city: str(32)
+    zip_code: c_uint32
+
+@bpf
+@struct
+class Person:
+    name: str(32)
+    age: c_uint32
+    address: Address   # Nested struct
+```
+
+## Using Structs
+
+### As Local Variables
+
+Create and use struct instances within BPF functions:
+
+```python
+from pythonbpf import bpf, struct, section
+from pythonbpf.helper import pid, ktime, comm
+from ctypes import c_void_p, c_int64, c_uint64, c_uint32
+
+@bpf
+@struct
+class Event:
+    timestamp: c_uint64
+    pid: c_uint32
+    comm: str(16)
+
+@bpf
+@section("tracepoint/syscalls/sys_enter_execve")
+def capture_event(ctx: c_void_p) -> c_int64:
+    # Create an instance
+    event = Event()
+
+    # Set fields
+    event.timestamp = ktime()
+    event.pid = pid()
+    comm(event.comm)  # Fills event.comm with process name
+
+    # Use the struct
+    print(f"Process with PID {event.pid}")
+
+    return 0
+```
+
+### As Map Keys and Values
+
+Use structs as keys and values in maps for complex state storage:
+
+```python
+from pythonbpf import bpf, struct, map, section
+from pythonbpf.maps import HashMap
+from ctypes import c_uint32, c_uint64
+
+@bpf
+@struct
+class ProcessStats:
+    syscall_count: c_uint64
+    total_time: c_uint64
+    max_latency: c_uint64
+
+@bpf
+@map
+def stats() -> HashMap:
+    return HashMap(
+        key=c_uint32,
+        value=ProcessStats,
+        max_entries=1024
+    )
+
+@bpf
+@section("tracepoint/syscalls/sys_enter_read")
+def track_syscalls(ctx: c_void_p) -> c_int64:
+    process_id = pid()
+
+    # Lookup existing stats
+    s = stats.lookup(process_id)
+
+    if s:
+        # Update existing stats
+        s.syscall_count = s.syscall_count + 1
+        stats.update(process_id, s)
+    else:
+        # Create new stats
+        new_stats = ProcessStats()
+        new_stats.syscall_count = 1
+        new_stats.total_time = 0
+        new_stats.max_latency = 0
+        stats.update(process_id, new_stats)
+
+    return 0
+```
+
+### With Perf Events
+
+Send struct data to userspace using PerfEventArray:
+
+```python
+from pythonbpf import bpf, struct, map, section
+from pythonbpf.maps import PerfEventArray
+from pythonbpf.helper import pid, ktime, comm
+from ctypes import c_void_p, c_int64, c_uint32, c_uint64
+
+@bpf
+@struct
+class ProcessEvent:
+    timestamp: c_uint64
+    pid: c_uint32
+    ppid: c_uint32
+    comm: str(16)
+
+@bpf
+@map
+def events() -> PerfEventArray:
+    return PerfEventArray(key_size=c_uint32, value_size=c_uint32)
+
+@bpf
+@section("tracepoint/sched/sched_process_fork")
+def trace_fork(ctx: c_void_p) -> c_int64:
+    event = ProcessEvent()
+    event.timestamp = ktime()
+    event.pid = pid()
+    comm(event.comm)  # Fills event.comm with process name
+
+    # Send to userspace
+    events.output(event)
+
+    return 0
+```
+
+### With Ring Buffers
+
+```python
+from pythonbpf import bpf, struct, map, section
+from pythonbpf.maps import RingBuffer
+
+@bpf
+@struct
+class FileEvent:
+    timestamp: c_uint64
+    pid: c_uint32
+    filename: str(256)
+
+@bpf
+@map
+def events() -> RingBuffer:
+    return RingBuffer(max_entries=4096)
+
+@bpf
+@section("tracepoint/syscalls/sys_enter_openat")
+def trace_open(ctx: c_void_p) -> c_int64:
+    event = FileEvent()
+    event.timestamp = ktime()
+    event.pid = pid()
+
+    events.output(event)
+
+    return 0
+```
+
+## Field Access and Modification
+
+### Reading Fields
+
+Access struct fields using dot notation:
+
+```python
+event = Event()
+ts = event.timestamp
+process_id = event.pid
+```
+
+### Writing Fields
+
+Assign values to fields:
+
+```python
+event = Event()
+event.timestamp = ktime()
+event.pid = pid()
+comm(event.comm)
+```
+
+## StructType Class
+
+PythonBPF provides a `StructType` class for working with struct metadata:
+
+```python
+from pythonbpf.structs import StructType
+
+# Define a struct
+@bpf
+@struct
+class MyStruct:
+    field1: c_uint64
+    field2: c_uint32
+
+# Access struct information (from userspace)
+# This is typically used internally by the compiler
+```
+
+## Complex Examples
+
+### Network Packet Event
+
+```python
+from pythonbpf import bpf, struct, map, section
+from pythonbpf.maps import RingBuffer
+from pythonbpf.helper import ktime, XDP_PASS
+from ctypes import c_void_p, c_int64, c_uint8, c_uint16, c_uint32, c_uint64
+
+@bpf
+@struct
+class PacketEvent:
+    timestamp: c_uint64
+    src_ip: c_uint32
+    dst_ip: c_uint32
+    src_port: c_uint16
+    dst_port: c_uint16
+    protocol: c_uint8
+    length: c_uint16
+
+@bpf
+@map
+def packets() -> RingBuffer:
+    return RingBuffer(max_entries=8192)
+
+@bpf
+@section("xdp")
+def capture_packets(ctx: c_void_p) -> c_int64:
+    pkt = PacketEvent()
+    pkt.timestamp = ktime()
+    # Parse packet data from ctx...
+
+    packets.output(pkt)
+
+    return XDP_PASS
+```
+
+### Process Lifecycle Tracking
+
+```python
+@bpf
+@struct
+class ProcessLifecycle:
+    pid: c_uint32
+    ppid: c_uint32
+    start_time: c_uint64
+    exit_time: c_uint64
+    exit_code: c_int32
+    comm: str(16)
+
+@bpf
+@map
+def process_info() -> HashMap:
+    return HashMap(
+        key=c_uint32,
+        value=ProcessLifecycle,
+        max_entries=4096
+    )
+
+@bpf
+@section("tracepoint/sched/sched_process_fork")
+def track_fork(ctx: c_void_p) -> c_int64:
+    process_id = pid()
+
+    info = ProcessLifecycle()
+    info.pid = process_id
+    info.start_time = ktime()
+
+    process_info.update(process_id, info)
+
+    return 0
+
+@bpf
+@section("tracepoint/sched/sched_process_exit")
+def track_exit(ctx: c_void_p) -> c_int64:
+    process_id = pid()
+
+    info = process_info.lookup(process_id)
+    if info:
+        info.exit_time = ktime()
+        process_info.update(process_id, info)
+
+    return 0
+```
+
+## Troubleshooting
+
+### Struct Size Issues
+
+If you encounter size-related errors:
+* Check for excessive padding
+* Verify field types are correct
+* Consider reordering fields
+
+### Initialization Problems
+
+If fields aren't initialized correctly:
+* Always initialize all fields explicitly
+* Set default values where appropriate
+* Use helper functions for dynamic values
+
+### Type Mismatch Errors
+
+If you get type errors:
+* Ensure field types match assignments
+* Check that imported types are from `ctypes`
+* Verify nested struct definitions
+
+## Reading Struct Data in Userspace
+
+After capturing struct data, read it in Python:
+
+```python
+from pylibbpf import BpfMap
+
+# Read from map
+map_obj = BpfMap(b, stats)
+for key, value_bytes in map_obj.items():
+    value = Event.from_buffer_copy(value_bytes)
+    print(f"PID: {value.pid}, Comm: {value.comm.decode()}")
+```
+
+## Next Steps
+
+* Learn about {doc}`maps` for storing struct data
+* Explore {doc}`helpers` for populating struct fields
+* See {doc}`compilation` to understand how structs are compiled

examples/anomaly-detection/lib/__init__.py

@@ -0,0 +1,22 @@
+"""
+Process Anomaly Detection - Constants and Utilities
+"""
+
+import logging
+
+logger = logging.getLogger(__name__)
+MAX_SYSCALLS = 548
+
+
+def comm_for_pid(pid: int) -> bytes | None:
+    """Get process name from /proc."""
+    try:
+        with open(f"/proc/{pid}/comm", "rb") as f:
+            return f.read().strip()
+    except FileNotFoundError:
+        logger.warning(f"Process with PID {pid} not found.")
+    except PermissionError:
+        logger.warning(f"Permission denied when accessing /proc/{pid}/comm.")
+    except Exception as e:
+        logger.warning(f"Error reading /proc/{pid}/comm: {e}")
+    return None

examples/anomaly-detection/lib/ml.py

@@ -0,0 +1,173 @@
+"""
+Autoencoder for Process Behavior Anomaly Detection
+
+Uses Keras/TensorFlow to train an autoencoder on syscall patterns.
+Anomalies are detected when reconstruction error exceeds threshold.
+"""
+
+import logging
+import os
+
+import numpy as np
+import pandas as pd
+from sklearn.model_selection import train_test_split
+from tensorflow import keras
+
+from lib import MAX_SYSCALLS
+
+logger = logging.getLogger(__name__)
+
+
+def create_autoencoder(n_inputs: int = MAX_SYSCALLS) -> keras.Model:
+    """
+    Create the autoencoder architecture.
+
+    Architecture: input → encoder → bottleneck → decoder → output
+    """
+    inp = keras.Input(shape=(n_inputs,))
+
+    # Encoder
+    encoder = keras.layers.Dense(n_inputs)(inp)
+    encoder = keras.layers.ReLU()(encoder)
+
+    # Bottleneck (compressed representation)
+    bottleneck = keras.layers.Dense(n_inputs // 2)(encoder)
+
+    # Decoder
+    decoder = keras.layers.Dense(n_inputs)(bottleneck)
+    decoder = keras.layers.ReLU()(decoder)
+    output = keras.layers.Dense(n_inputs, activation="linear")(decoder)
+
+    model = keras.Model(inp, output)
+    model.compile(optimizer="adam", loss="mse")
+
+    return model
+
+
+class AutoEncoder:
+    """
+    Autoencoder for syscall pattern anomaly detection.
+
+    Usage:
+        # Training
+        ae = AutoEncoder('model.keras')
+        model, threshold = ae.train('data.csv', epochs=200)
+
+        # Inference
+        ae = AutoEncoder('model.keras', load=True)
+        _, errors, total_error = ae.predict([features])
+    """
+
+    def __init__(self, filename: str, load: bool = False):
+        self.filename = filename
+        self.model = None
+
+        if load:
+            self._load_model()
+
+    def _load_model(self) -> None:
+        """Load a trained model from disk."""
+        if not os.path.exists(self.filename):
+            raise FileNotFoundError(f"Model file not found: {self.filename}")
+
+        logger.info(f"Loading model from {self.filename}")
+        self.model = keras.models.load_model(self.filename)
+
+    def train(
+        self,
+        datafile: str,
+        epochs: int,
+        batch_size: int,
+        test_size: float = 0.1,
+    ) -> tuple[keras.Model, float]:
+        """
+        Train the autoencoder on collected data.
+
+        Args:
+            datafile: Path to CSV file with training data
+            epochs: Number of training epochs
+            batch_size: Training batch size
+            test_size: Fraction of data to use for validation
+
+        Returns:
+            Tuple of (trained model, error threshold)
+        """
+        if not os.path.exists(datafile):
+            raise FileNotFoundError(f"Data file not found: {datafile}")
+
+        logger.info(f"Loading training data from {datafile}")
+
+        # Load and prepare data
+        df = pd.read_csv(datafile)
+        features = df.drop(["sample_time"], axis=1).values
+
+        logger.info(f"Loaded {len(features)} samples with {features.shape[1]} features")
+
+        # Split train/test
+        train_data, test_data = train_test_split(
+            features,
+            test_size=test_size,
+            random_state=42,
+        )
+
+        logger.info(f"Training set: {len(train_data)} samples")
+        logger.info(f"Test set: {len(test_data)} samples")
+
+        # Create and train model
+        self.model = create_autoencoder()
+
+        if self.model is None:
+            raise RuntimeError("Failed to create the autoencoder model.")
+
+        logger.info("Training autoencoder...")
+        self.model.fit(
+            train_data,
+            train_data,
+            validation_data=(test_data, test_data),
+            epochs=epochs,
+            batch_size=batch_size,
+            verbose=1,
+        )
+
+        # Save model (use .keras format for Keras 3.x compatibility)
+        self.model.save(self.filename)
+        logger.info(f"Model saved to {self.filename}")
+
+        # Calculate error threshold from test data
+        threshold = self._calculate_threshold(test_data)
+
+        return self.model, threshold
+
+    def _calculate_threshold(self, test_data: np.ndarray) -> float:
+        """Calculate error threshold from test data."""
+        logger.info(f"Calculating error threshold from {len(test_data)} test samples")
+
+        if self.model is None:
+            raise RuntimeError("Model not loaded. Use load=True or train first.")
+
+        predictions = self.model.predict(test_data, verbose=0)
+        errors = np.abs(test_data - predictions).sum(axis=1)
+
+        return float(errors.max())
+
+    def predict(self, X: list | np.ndarray) -> tuple[np.ndarray, np.ndarray, float]:
+        """
+        Run prediction and return reconstruction error.
+
+        Args:
+            X: Input data (list of feature vectors)
+
+        Returns:
+            Tuple of (reconstructed, per_feature_errors, total_error)
+        """
+        if self.model is None:
+            raise RuntimeError("Model not loaded. Use load=True or train first.")
+
+        X = np.asarray(X, dtype=np.float32)
+        y = self.model.predict(X, verbose=0)
+
+        # Per-feature reconstruction error
+        errors = np.abs(X[0] - y[0])
+        total_error = float(errors.sum())
+
+        return y, errors, total_error

examples/anomaly-detection/lib/platform.py

@@ -0,0 +1,448 @@
+# Copyright 2017 Sasha Goldshtein
+# Copyright 2018 Red Hat, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""
+syscall.py contains functions useful for mapping between syscall names and numbers
+"""
+
+# Syscall table for Linux x86_64, not very recent. Automatically generated from
+# https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tree/arch/x86/entry/syscalls/syscall_64.tbl?h=linux-6.17.y
+# using the following command:
+#
+# cat arch/x86/entry/syscalls/syscall_64.tbl \
+#     | awk 'BEGIN    { print "syscalls = {"         }
+#            /^[0-9]/ { print "    "$1": b\""$3"\"," }
+#            END      { print "}"                    }'
+
+SYSCALLS = {
+    0: b"read",
+    1: b"write",
+    2: b"open",
+    3: b"close",
+    4: b"stat",
+    5: b"fstat",
+    6: b"lstat",
+    7: b"poll",
+    8: b"lseek",
+    9: b"mmap",
+    10: b"mprotect",
+    11: b"munmap",
+    12: b"brk",
+    13: b"rt_sigaction",
+    14: b"rt_sigprocmask",
+    15: b"rt_sigreturn",
+    16: b"ioctl",
+    17: b"pread64",
+    18: b"pwrite64",
+    19: b"readv",
+    20: b"writev",
+    21: b"access",
+    22: b"pipe",
+    23: b"select",
+    24: b"sched_yield",
+    25: b"mremap",
+    26: b"msync",
+    27: b"mincore",
+    28: b"madvise",
+    29: b"shmget",
+    30: b"shmat",
+    31: b"shmctl",
+    32: b"dup",
+    33: b"dup2",
+    34: b"pause",
+    35: b"nanosleep",
+    36: b"getitimer",
+    37: b"alarm",
+    38: b"setitimer",
+    39: b"getpid",
+    40: b"sendfile",
+    41: b"socket",
+    42: b"connect",
+    43: b"accept",
+    44: b"sendto",
+    45: b"recvfrom",
+    46: b"sendmsg",
+    47: b"recvmsg",
+    48: b"shutdown",
+    49: b"bind",
+    50: b"listen",
+    51: b"getsockname",
+    52: b"getpeername",
+    53: b"socketpair",
+    54: b"setsockopt",
+    55: b"getsockopt",
+    56: b"clone",
+    57: b"fork",
+    58: b"vfork",
+    59: b"execve",
+    60: b"exit",
+    61: b"wait4",
+    62: b"kill",
+    63: b"uname",
+    64: b"semget",
+    65: b"semop",
+    66: b"semctl",
+    67: b"shmdt",
+    68: b"msgget",
+    69: b"msgsnd",
+    70: b"msgrcv",
+    71: b"msgctl",
+    72: b"fcntl",
+    73: b"flock",
+    74: b"fsync",
+    75: b"fdatasync",
+    76: b"truncate",
+    77: b"ftruncate",
+    78: b"getdents",
+    79: b"getcwd",
+    80: b"chdir",
+    81: b"fchdir",
+    82: b"rename",
+    83: b"mkdir",
+    84: b"rmdir",
+    85: b"creat",
+    86: b"link",
+    87: b"unlink",
+    88: b"symlink",
+    89: b"readlink",
+    90: b"chmod",
+    91: b"fchmod",
+    92: b"chown",
+    93: b"fchown",
+    94: b"lchown",
+    95: b"umask",
+    96: b"gettimeofday",
+    97: b"getrlimit",
+    98: b"getrusage",
+    99: b"sysinfo",
+    100: b"times",
+    101: b"ptrace",
+    102: b"getuid",
+    103: b"syslog",
+    104: b"getgid",
+    105: b"setuid",
+    106: b"setgid",
+    107: b"geteuid",
+    108: b"getegid",
+    109: b"setpgid",
+    110: b"getppid",
+    111: b"getpgrp",
+    112: b"setsid",
+    113: b"setreuid",
+    114: b"setregid",
+    115: b"getgroups",
+    116: b"setgroups",
+    117: b"setresuid",
+    118: b"getresuid",
+    119: b"setresgid",
+    120: b"getresgid",
+    121: b"getpgid",
+    122: b"setfsuid",
+    123: b"setfsgid",
+    124: b"getsid",
+    125: b"capget",
+    126: b"capset",
+    127: b"rt_sigpending",
+    128: b"rt_sigtimedwait",
+    129: b"rt_sigqueueinfo",
+    130: b"rt_sigsuspend",
+    131: b"sigaltstack",
+    132: b"utime",
+    133: b"mknod",
+    134: b"uselib",
+    135: b"personality",
+    136: b"ustat",
+    137: b"statfs",
+    138: b"fstatfs",
+    139: b"sysfs",
+    140: b"getpriority",
+    141: b"setpriority",
+    142: b"sched_setparam",
+    143: b"sched_getparam",
+    144: b"sched_setscheduler",
+    145: b"sched_getscheduler",
+    146: b"sched_get_priority_max",
+    147: b"sched_get_priority_min",
+    148: b"sched_rr_get_interval",
+    149: b"mlock",
+    150: b"munlock",
+    151: b"mlockall",
+    152: b"munlockall",
+    153: b"vhangup",
+    154: b"modify_ldt",
+    155: b"pivot_root",
+    156: b"_sysctl",
+    157: b"prctl",
+    158: b"arch_prctl",
+    159: b"adjtimex",
+    160: b"setrlimit",
+    161: b"chroot",
+    162: b"sync",
+    163: b"acct",
+    164: b"settimeofday",
+    165: b"mount",
+    166: b"umount2",
+    167: b"swapon",
+    168: b"swapoff",
+    169: b"reboot",
+    170: b"sethostname",
+    171: b"setdomainname",
+    172: b"iopl",
+    173: b"ioperm",
+    174: b"create_module",
+    175: b"init_module",
+    176: b"delete_module",
+    177: b"get_kernel_syms",
+    178: b"query_module",
+    179: b"quotactl",
+    180: b"nfsservctl",
+    181: b"getpmsg",
+    182: b"putpmsg",
+    183: b"afs_syscall",
+    184: b"tuxcall",
+    185: b"security",
+    186: b"gettid",
+    187: b"readahead",
+    188: b"setxattr",
+    189: b"lsetxattr",
+    190: b"fsetxattr",
+    191: b"getxattr",
+    192: b"lgetxattr",
+    193: b"fgetxattr",
+    194: b"listxattr",
+    195: b"llistxattr",
+    196: b"flistxattr",
+    197: b"removexattr",
+    198: b"lremovexattr",
+    199: b"fremovexattr",
+    200: b"tkill",
+    201: b"time",
+    202: b"futex",
+    203: b"sched_setaffinity",
+    204: b"sched_getaffinity",
+    205: b"set_thread_area",
+    206: b"io_setup",
+    207: b"io_destroy",
+    208: b"io_getevents",
+    209: b"io_submit",
+    210: b"io_cancel",
+    211: b"get_thread_area",
+    212: b"lookup_dcookie",
+    213: b"epoll_create",
+    214: b"epoll_ctl_old",
+    215: b"epoll_wait_old",
+    216: b"remap_file_pages",
+    217: b"getdents64",
+    218: b"set_tid_address",
+    219: b"restart_syscall",
+    220: b"semtimedop",
+    221: b"fadvise64",
+    222: b"timer_create",
+    223: b"timer_settime",
+    224: b"timer_gettime",
+    225: b"timer_getoverrun",
+    226: b"timer_delete",
+    227: b"clock_settime",
+    228: b"clock_gettime",
+    229: b"clock_getres",
+    230: b"clock_nanosleep",
+    231: b"exit_group",
+    232: b"epoll_wait",
+    233: b"epoll_ctl",
+    234: b"tgkill",
+    235: b"utimes",
+    236: b"vserver",
+    237: b"mbind",
+    238: b"set_mempolicy",
+    239: b"get_mempolicy",
+    240: b"mq_open",
+    241: b"mq_unlink",
+    242: b"mq_timedsend",
+    243: b"mq_timedreceive",
+    244: b"mq_notify",
+    245: b"mq_getsetattr",
+    246: b"kexec_load",
+    247: b"waitid",
+    248: b"add_key",
+    249: b"request_key",
+    250: b"keyctl",
+    251: b"ioprio_set",
+    252: b"ioprio_get",
+    253: b"inotify_init",
+    254: b"inotify_add_watch",
+    255: b"inotify_rm_watch",
+    256: b"migrate_pages",
+    257: b"openat",
+    258: b"mkdirat",
+    259: b"mknodat",
+    260: b"fchownat",
+    261: b"futimesat",
+    262: b"newfstatat",
+    263: b"unlinkat",
+    264: b"renameat",
+    265: b"linkat",
+    266: b"symlinkat",
+    267: b"readlinkat",
+    268: b"fchmodat",
+    269: b"faccessat",
+    270: b"pselect6",
+    271: b"ppoll",
+    272: b"unshare",
+    273: b"set_robust_list",
+    274: b"get_robust_list",
+    275: b"splice",
+    276: b"tee",
+    277: b"sync_file_range",
+    278: b"vmsplice",
+    279: b"move_pages",
+    280: b"utimensat",
+    281: b"epoll_pwait",
+    282: b"signalfd",
+    283: b"timerfd_create",
+    284: b"eventfd",
+    285: b"fallocate",
+    286: b"timerfd_settime",
+    287: b"timerfd_gettime",
+    288: b"accept4",
+    289: b"signalfd4",
+    290: b"eventfd2",
+    291: b"epoll_create1",
+    292: b"dup3",
+    293: b"pipe2",
+    294: b"inotify_init1",
+    295: b"preadv",
+    296: b"pwritev",
+    297: b"rt_tgsigqueueinfo",
+    298: b"perf_event_open",
+    299: b"recvmmsg",
+    300: b"fanotify_init",
+    301: b"fanotify_mark",
+    302: b"prlimit64",
+    303: b"name_to_handle_at",
+    304: b"open_by_handle_at",
+    305: b"clock_adjtime",
+    306: b"syncfs",
+    307: b"sendmmsg",
+    308: b"setns",
+    309: b"getcpu",
+    310: b"process_vm_readv",
+    311: b"process_vm_writev",
+    312: b"kcmp",
+    313: b"finit_module",
+    314: b"sched_setattr",
+    315: b"sched_getattr",
+    316: b"renameat2",
+    317: b"seccomp",
+    318: b"getrandom",
+    319: b"memfd_create",
+    320: b"kexec_file_load",
+    321: b"bpf",
+    322: b"execveat",
+    323: b"userfaultfd",
+    324: b"membarrier",
+    325: b"mlock2",
+    326: b"copy_file_range",
+    327: b"preadv2",
+    328: b"pwritev2",
+    329: b"pkey_mprotect",
+    330: b"pkey_alloc",
+    331: b"pkey_free",
+    332: b"statx",
+    333: b"io_pgetevents",
+    334: b"rseq",
+    335: b"uretprobe",
+    424: b"pidfd_send_signal",
+    425: b"io_uring_setup",
+    426: b"io_uring_enter",
+    427: b"io_uring_register",
+    428: b"open_tree",
+    429: b"move_mount",
+    430: b"fsopen",
+    431: b"fsconfig",
+    432: b"fsmount",
+    433: b"fspick",
+    434: b"pidfd_open",
+    435: b"clone3",
+    436: b"close_range",
+    437: b"openat2",
+    438: b"pidfd_getfd",
+    439: b"faccessat2",
+    440: b"process_madvise",
+    441: b"epoll_pwait2",
+    442: b"mount_setattr",
+    443: b"quotactl_fd",
+    444: b"landlock_create_ruleset",
+    445: b"landlock_add_rule",
+    446: b"landlock_restrict_self",
+    447: b"memfd_secret",
+    448: b"process_mrelease",
+    449: b"futex_waitv",
+    450: b"set_mempolicy_home_node",
+    451: b"cachestat",
+    452: b"fchmodat2",
+    453: b"map_shadow_stack",
+    454: b"futex_wake",
+    455: b"futex_wait",
+    456: b"futex_requeue",
+    457: b"statmount",
+    458: b"listmount",
+    459: b"lsm_get_self_attr",
+    460: b"lsm_set_self_attr",
+    461: b"lsm_list_modules",
+    462: b"mseal",
+    463: b"setxattrat",
+    464: b"getxattrat",
+    465: b"listxattrat",
+    466: b"removexattrat",
+    467: b"open_tree_attr",
+    468: b"file_getattr",
+    469: b"file_setattr",
+    512: b"rt_sigaction",
+    513: b"rt_sigreturn",
+    514: b"ioctl",
+    515: b"readv",
+    516: b"writev",
+    517: b"recvfrom",
+    518: b"sendmsg",
+    519: b"recvmsg",
+    520: b"execve",
+    521: b"ptrace",
+    522: b"rt_sigpending",
+    523: b"rt_sigtimedwait",
+    524: b"rt_sigqueueinfo",
+    525: b"sigaltstack",
+    526: b"timer_create",
+    527: b"mq_notify",
+    528: b"kexec_load",
+    529: b"waitid",
+    530: b"set_robust_list",
+    531: b"get_robust_list",
+    532: b"vmsplice",
+    533: b"move_pages",
+    534: b"preadv",
+    535: b"pwritev",
+    536: b"rt_tgsigqueueinfo",
+    537: b"recvmmsg",
+    538: b"sendmmsg",
+    539: b"process_vm_readv",
+    540: b"process_vm_writev",
+    541: b"setsockopt",
+    542: b"getsockopt",
+    543: b"io_setup",
+    544: b"io_submit",
+    545: b"execveat",
+    546: b"preadv2",
+    547: b"pwritev2",
+}

examples/anomaly-detection/lib/probe.py

@@ -0,0 +1,117 @@
+"""
+PythonBPF eBPF Probe for Syscall Histogram Collection
+"""
+
+from vmlinux import struct_trace_event_raw_sys_enter
+from pythonbpf import bpf, map, section, bpfglobal, BPF
+from pythonbpf.helper import pid
+from pythonbpf.maps import HashMap
+from ctypes import c_int64
+from lib import MAX_SYSCALLS, comm_for_pid
+
+
+@bpf
+@map
+def histogram() -> HashMap:
+    return HashMap(key=c_int64, value=c_int64, max_entries=1024)
+
+
+@bpf
+@map
+def target_pid_map() -> HashMap:
+    return HashMap(key=c_int64, value=c_int64, max_entries=1)
+
+
+@bpf
+@section("tracepoint/raw_syscalls/sys_enter")
+def trace_syscall(ctx: struct_trace_event_raw_sys_enter) -> c_int64:
+    syscall_id = ctx.id
+    current_pid = pid()
+    target = target_pid_map.lookup(0)
+    if target:
+        if current_pid != target:
+            return 0  # type: ignore
+    if syscall_id < 0 or syscall_id >= 548:
+        return 0  # type: ignore
+    count = histogram.lookup(syscall_id)
+    if count:
+        histogram.update(syscall_id, count + 1)
+    else:
+        histogram.update(syscall_id, 1)
+    return 0  # type: ignore
+
+
+@bpf
+@bpfglobal
+def LICENSE() -> str:
+    return "GPL"
+
+
+ebpf_prog = BPF()
+
+
+class Probe:
+    """
+    Syscall histogram probe for a target process.
+
+    Usage:
+        probe = Probe(target_pid=1234)
+        probe.start()
+        histogram = probe.get_histogram()
+    """
+
+    def __init__(self, target_pid: int, max_syscalls: int = MAX_SYSCALLS):
+        self.target_pid = target_pid
+        self.max_syscalls = max_syscalls
+        self.comm = comm_for_pid(target_pid)
+
+        if self.comm is None:
+            raise ValueError(f"Cannot find process with PID {target_pid}")
+
+        self._bpf = None
+        self._histogram_map = None
+        self._target_map = None
+
+    def start(self):
+        """Compile, load, and attach the BPF probe."""
+        # Compile and load
+        self._bpf = ebpf_prog
+        self._bpf.load()
+        self._bpf.attach_all()
+
+        # Get map references
+        self._histogram_map = self._bpf["histogram"]
+        self._target_map = self._bpf["target_pid_map"]
+
+        # Set target PID in the map
+        self._target_map.update(0, self.target_pid)
+
+        return self
+
+    def get_histogram(self) -> list:
+        """Read current histogram values as a list."""
+        if self._histogram_map is None:
+            raise RuntimeError("Probe not started.  Call start() first.")
+
+        result = [0] * self.max_syscalls
+
+        for syscall_id in range(self.max_syscalls):
+            try:
+                count = self._histogram_map.lookup(syscall_id)
+                if count is not None:
+                    result[syscall_id] = int(count)
+            except Exception:
+                pass
+
+        return result
+
+    def __getitem__(self, syscall_id: int) -> int:
+        """Allow indexing: probe[syscall_id]"""
+        if self._histogram_map is None:
+            raise RuntimeError("Probe not started")
+
+        try:
+            count = self._histogram_map.lookup(syscall_id)
+            return int(count) if count is not None else 0
+        except Exception:
+            return 0

examples/anomaly-detection/main.py

@@ -0,0 +1,335 @@
+#!/usr/bin/env python3
+"""
+Process Behavior Anomaly Detection using PythonBPF and Autoencoders
+
+Ported from evilsocket's BCC implementation to PythonBPF.
+https://github.com/evilsocket/ebpf-process-anomaly-detection
+
+Usage:
+    # 1.Learn normal behavior from a process
+    sudo python main.py --learn --pid 1234 --data normal.csv
+
+    # 2.Train the autoencoder (no sudo needed)
+    python main.py --train --data normal.csv --model model.h5
+
+    # 3.Monitor for anomalies
+    sudo python main.py --run --pid 1234 --model model.h5
+"""
+
+import argparse
+import logging
+import os
+import sys
+import time
+from collections import Counter
+
+from lib import MAX_SYSCALLS
+from lib.ml import AutoEncoder
+from lib.platform import SYSCALLS
+from lib.probe import Probe
+
+logging.basicConfig(
+    level=logging.INFO,
+    format="%(asctime)s [%(levelname)s] %(name)s: %(message)s",
+    datefmt="%Y-%m-%d %H:%M:%S",
+)
+logger = logging.getLogger(__name__)
+
+
+def learn(pid: int, data_path: str, poll_interval_ms: int) -> None:
+    """
+    Capture syscall patterns from target process.
+
+    Args:
+        pid: Target process ID
+        data_path: Path to save CSV data
+        poll_interval_ms: Polling interval in milliseconds
+    """
+    if os.path.exists(data_path):
+        logger.error(
+            f"{data_path} already exists.Delete it or use a different filename."
+        )
+        sys.exit(1)
+
+    try:
+        probe = Probe(pid)
+    except ValueError as e:
+        logger.error(str(e))
+        sys.exit(1)
+
+    probe_comm = probe.comm.decode() if probe.comm else "unknown"
+
+    print(f"📊 Learning from process {pid} ({probe_comm})")
+    print(f"📁 Saving data to {data_path}")
+    print(f"⏱️  Polling interval: {poll_interval_ms}ms")
+    print("Press Ctrl+C to stop...\n")
+
+    probe.start()
+
+    prev_histogram = [0.0] * MAX_SYSCALLS
+    prev_report_time = time.time()
+    sample_count = 0
+    poll_interval_sec = poll_interval_ms / 1000.0
+
+    header = "sample_time," + ",".join(f"sys_{i}" for i in range(MAX_SYSCALLS))
+
+    with open(data_path, "w") as fp:
+        fp.write(header + "\n")
+
+        try:
+            while True:
+                histogram = [float(x) for x in probe.get_histogram()]
+
+                if histogram != prev_histogram:
+                    deltas = _compute_deltas(prev_histogram, histogram)
+                    prev_histogram = histogram.copy()
+
+                    row = f"{time.time()},{','.join(map(str, deltas))}"
+                    fp.write(row + "\n")
+                    fp.flush()
+                    sample_count += 1
+
+                now = time.time()
+                if now - prev_report_time >= 1.0:
+                    print(f"  {sample_count} samples saved...")
+                    prev_report_time = now
+
+                time.sleep(poll_interval_sec)
+
+        except KeyboardInterrupt:
+            print(f"\n✅ Stopped. Saved {sample_count} samples to {data_path}")
+
+
+def train(data_path: str, model_path: str, epochs: int, batch_size: int) -> None:
+    """
+    Train autoencoder on captured data.
+
+    Args:
+        data_path: Path to training CSV data
+        model_path: Path to save trained model
+        epochs: Number of training epochs
+        batch_size: Training batch size
+    """
+    if not os.path.exists(data_path):
+        logger.error(f"Data file {data_path} not found.Run --learn first.")
+        sys.exit(1)
+
+    print(f"🧠 Training autoencoder on {data_path}")
+    print(f"   Epochs: {epochs}")
+    print(f"   Batch size: {batch_size}")
+    print()
+
+    ae = AutoEncoder(model_path)
+    _, threshold = ae.train(data_path, epochs, batch_size)
+
+    print()
+    print("=" * 50)
+    print("✅ Training complete!")
+    print(f"   Model saved to: {model_path}")
+    print(f"   Error threshold: {threshold:.6f}")
+    print()
+    print(f"💡 Use --max-error {threshold:.4f} when running detection")
+    print("=" * 50)
+
+
+def run(pid: int, model_path: str, max_error: float, poll_interval_ms: int) -> None:
+    """
+    Monitor process and detect anomalies.
+
+    Args:
+        pid: Target process ID
+        model_path: Path to trained model
+        max_error: Anomaly detection threshold
+        poll_interval_ms: Polling interval in milliseconds
+    """
+    if not os.path.exists(model_path):
+        logger.error(f"Model file {model_path} not found. Run --train first.")
+        sys.exit(1)
+
+    try:
+        probe = Probe(pid)
+    except ValueError as e:
+        logger.error(str(e))
+        sys.exit(1)
+
+    ae = AutoEncoder(model_path, load=True)
+    probe_comm = probe.comm.decode() if probe.comm else "unknown"
+
+    print(f"🔍 Monitoring process {pid} ({probe_comm}) for anomalies")
+    print(f"   Error threshold: {max_error}")
+    print(f"   Polling interval: {poll_interval_ms}ms")
+    print("Press Ctrl+C to stop...\n")
+
+    probe.start()
+
+    prev_histogram = [0.0] * MAX_SYSCALLS
+    anomaly_count = 0
+    check_count = 0
+    poll_interval_sec = poll_interval_ms / 1000.0
+
+    try:
+        while True:
+            histogram = [float(x) for x in probe.get_histogram()]
+
+            if histogram != prev_histogram:
+                deltas = _compute_deltas(prev_histogram, histogram)
+                prev_histogram = histogram.copy()
+                check_count += 1
+
+                _, feat_errors, total_error = ae.predict([deltas])
+
+                if total_error > max_error:
+                    anomaly_count += 1
+                    _report_anomaly(anomaly_count, total_error, max_error, feat_errors)
+
+            time.sleep(poll_interval_sec)
+
+    except KeyboardInterrupt:
+        print("\n✅ Stopped.")
+        print(f"   Checks performed: {check_count}")
+        print(f"   Anomalies detected: {anomaly_count}")
+
+
+def _compute_deltas(prev: list[float], current: list[float]) -> list[float]:
+    """Compute rate of change between two histograms."""
+    deltas = []
+    for p, c in zip(prev, current):
+        if c != 0.0:
+            delta = 1.0 - (p / c)
+        else:
+            delta = 0.0
+        deltas.append(delta)
+    return deltas
+
+
+def _report_anomaly(
+    count: int,
+    total_error: float,
+    threshold: float,
+    feat_errors: list[float],
+) -> None:
+    """Print anomaly report with top offending syscalls."""
+    print(f"🚨 ANOMALY #{count} detected!")
+    print(f"   Total error: {total_error:.4f} (threshold: {threshold})")
+
+    errors_by_syscall = {idx: err for idx, err in enumerate(feat_errors)}
+    top3 = Counter(errors_by_syscall).most_common(3)
+
+    print("   Top anomalous syscalls:")
+    for idx, err in top3:
+        name = SYSCALLS.get(idx, f"syscall_{idx}")
+        print(f"     • {name!r}: {err:.4f}")
+    print()
+
+
+def parse_args() -> argparse.Namespace:
+    """Parse command line arguments."""
+    parser = argparse.ArgumentParser(
+        description="Process anomaly detection with PythonBPF and Autoencoders",
+        formatter_class=argparse.RawDescriptionHelpFormatter,
+        epilog="""
+Examples:
+  # Learn from a process (e.g., Firefox) for a few minutes
+  sudo python main.py --learn --pid $(pgrep -o firefox) --data firefox.csv
+
+  # Train the model (no sudo needed)
+  python main.py --train --data firefox.csv --model firefox.h5
+
+  # Monitor the same process for anomalies
+  sudo python main.py --run --pid $(pgrep -o firefox) --model firefox.h5
+
+  # Full workflow for nginx:
+  sudo python main.py --learn --pid $(pgrep -o nginx) --data nginx_normal.csv
+  python main.py --train --data nginx_normal.csv --model nginx.h5 --epochs 100
+  sudo python main.py --run --pid $(pgrep -o nginx) --model nginx.h5 --max-error 0.05
+        """,
+    )
+
+    actions = parser.add_mutually_exclusive_group()
+    actions.add_argument(
+        "--learn",
+        action="store_true",
+        help="Capture syscall patterns from a process",
+    )
+    actions.add_argument(
+        "--train",
+        action="store_true",
+        help="Train autoencoder on captured data",
+    )
+    actions.add_argument(
+        "--run",
+        action="store_true",
+        help="Monitor process for anomalies",
+    )
+
+    parser.add_argument(
+        "--pid",
+        type=int,
+        default=0,
+        help="Target process ID",
+    )
+    parser.add_argument(
+        "--data",
+        default="data.csv",
+        help="CSV file for training data (default: data.csv)",
+    )
+    parser.add_argument(
+        "--model",
+        default="model.keras",
+        help="Model file path (default: model.h5)",
+    )
+    parser.add_argument(
+        "--time",
+        type=int,
+        default=100,
+        help="Polling interval in milliseconds (default: 100)",
+    )
+    parser.add_argument(
+        "--epochs",
+        type=int,
+        default=200,
+        help="Training epochs (default: 200)",
+    )
+    parser.add_argument(
+        "--batch-size",
+        type=int,
+        default=16,
+        help="Training batch size (default: 16)",
+    )
+    parser.add_argument(
+        "--max-error",
+        type=float,
+        default=0.09,
+        help="Anomaly detection threshold (default: 0.09)",
+    )
+
+    return parser.parse_args()
+
+
+def main() -> None:
+    """Main entry point."""
+    args = parse_args()
+
+    if not any([args.learn, args.train, args.run]):
+        print("No action specified.Use --learn, --train, or --run.")
+        print("Run with --help for usage information.")
+        sys.exit(0)
+
+    if args.learn:
+        if args.pid == 0:
+            logger.error("--pid required for --learn")
+            sys.exit(1)
+        learn(args.pid, args.data, args.time)
+
+    elif args.train:
+        train(args.data, args.model, args.epochs, args.batch_size)
+
+    elif args.run:
+        if args.pid == 0:
+            logger.error("--pid required for --run")
+            sys.exit(1)
+        run(args.pid, args.model, args.max_error, args.time)
+
+
+if __name__ == "__main__":
+    main()

examples/binops_demo.py

@@ -21,17 +21,17 @@ def last() -> HashMap:
 @section("tracepoint/syscalls/sys_enter_execve")
 def do_trace(ctx: c_void_p) -> c_int64:
     key = 0
-    tsp = last().lookup(key)
+    tsp = last.lookup(key)
     if tsp:
         kt = ktime()
         delta = kt - tsp
         if delta < 1000000000:
             time_ms = delta // 1000000
             print(f"Execve syscall entered within last second, last {time_ms} ms ago")
-        last().delete(key)
+        last.delete(key)
     else:
         kt = ktime()
-        last().update(key, kt)
+        last.update(key, kt)
     return c_int64(0)
 
 

examples/clone_plot.py

@@ -3,7 +3,6 @@ import time
 from pythonbpf import bpf, map, section, bpfglobal, BPF
 from pythonbpf.helper import pid
 from pythonbpf.maps import HashMap
-from pylibbpf import BpfMap
 from ctypes import c_void_p, c_int64, c_uint64, c_int32
 import matplotlib.pyplot as plt
 
@@ -26,14 +25,14 @@ def hist() -> HashMap:
 def hello(ctx: c_void_p) -> c_int64:
     process_id = pid()
     one = 1
-    prev = hist().lookup(process_id)
+    prev = hist.lookup(process_id)
     if prev:
         previous_value = prev + 1
         print(f"count: {previous_value} with {process_id}")
-        hist().update(process_id, previous_value)
+        hist.update(process_id, previous_value)
         return c_int64(0)
     else:
-        hist().update(process_id, one)
+        hist.update(process_id, one)
     return c_int64(0)
 
 
@@ -44,12 +43,12 @@ def LICENSE() -> str:
 
 
 b = BPF()
-b.load_and_attach()
-hist = BpfMap(b, hist)
+b.load()
+b.attach_all()
 print("Recording")
 time.sleep(10)
 
-counts = list(hist.values())
+counts = list(b["hist"].values())
 
 plt.hist(counts, bins=20)
 plt.xlabel("Clone calls per PID")

examples/container-monitor/README.md

@@ -0,0 +1,49 @@
+# Container Monitor TUI
+
+A beautiful terminal-based container monitoring tool that combines syscall tracking, file I/O monitoring, and network traffic analysis using eBPF.
+
+## Features
+
+- 🎯 **Interactive Cgroup Selection** - Navigate and select cgroups with arrow keys
+- 📊 **Real-time Monitoring** - Live graphs and statistics
+- 🔥 **Syscall Tracking** - Total syscall count per cgroup
+- 💾 **File I/O Monitoring** - Read/write operations and bytes with graphs
+- 🌐 **Network Traffic** - RX/TX packets and bytes with live graphs
+- ⚡ **Efficient Caching** - Reduced /proc lookups for better performance
+- 🎨 **Beautiful TUI** - Clean, colorful terminal interface
+
+## Requirements
+
+- Python 3.7+
+- pythonbpf
+- Root privileges (for eBPF)
+
+## Installation
+
+```bash
+# Ensure you have pythonbpf installed
+pip install pythonbpf
+
+# Run the monitor
+sudo $(which python) container_monitor.py
+```
+
+## Usage
+
+1. **Selection Screen**: Use ↑↓ arrow keys to navigate through cgroups, press ENTER to select
+2. **Monitoring Screen**: View real-time graphs and statistics, press ESC or 'b' to go back
+3. **Exit**: Press 'q' at any time to quit
+
+## Architecture
+
+- `container_monitor.py` - Main BPF program combining all three tracers
+- `data_collector.py` - Data collection, caching, and history management
+- `tui. py` - Terminal user interface with selection and monitoring screens
+
+## BPF Programs
+
+- **vfs_read/vfs_write** - Track file I/O operations
+- **__netif_receive_skb/__dev_queue_xmit** - Track network traffic
+- **raw_syscalls/sys_enter** - Count all syscalls
+
+All programs filter by cgroup ID for per-container monitoring.

examples/container-monitor/container_monitor.py

@@ -0,0 +1,220 @@
+"""Container Monitor - TUI-based cgroup monitoring combining syscall, file I/O, and network tracking."""
+
+from pythonbpf import bpf, map, section, bpfglobal, struct, BPF
+from pythonbpf.maps import HashMap
+from pythonbpf.helper import get_current_cgroup_id
+from ctypes import c_int32, c_uint64, c_void_p
+from vmlinux import struct_pt_regs, struct_sk_buff
+
+from data_collection import ContainerDataCollector
+from tui import ContainerMonitorTUI
+
+
+# ==================== BPF Structs ====================
+
+
+@bpf
+@struct
+class read_stats:
+    bytes: c_uint64
+    ops: c_uint64
+
+
+@bpf
+@struct
+class write_stats:
+    bytes: c_uint64
+    ops: c_uint64
+
+
+@bpf
+@struct
+class net_stats:
+    rx_packets: c_uint64
+    tx_packets: c_uint64
+    rx_bytes: c_uint64
+    tx_bytes: c_uint64
+
+
+# ==================== BPF Maps ====================
+
+
+@bpf
+@map
+def read_map() -> HashMap:
+    return HashMap(key=c_uint64, value=read_stats, max_entries=1024)
+
+
+@bpf
+@map
+def write_map() -> HashMap:
+    return HashMap(key=c_uint64, value=write_stats, max_entries=1024)
+
+
+@bpf
+@map
+def net_stats_map() -> HashMap:
+    return HashMap(key=c_uint64, value=net_stats, max_entries=1024)
+
+
+@bpf
+@map
+def syscall_count() -> HashMap:
+    return HashMap(key=c_uint64, value=c_uint64, max_entries=1024)
+
+
+# ==================== File I/O Tracing ====================
+
+
+@bpf
+@section("kprobe/vfs_read")
+def trace_read(ctx: struct_pt_regs) -> c_int32:
+    cg = get_current_cgroup_id()
+    count = c_uint64(ctx.dx)
+    ptr = read_map.lookup(cg)
+    if ptr:
+        s = read_stats()
+        s.bytes = ptr.bytes + count
+        s.ops = ptr.ops + 1
+        read_map.update(cg, s)
+    else:
+        s = read_stats()
+        s.bytes = count
+        s.ops = c_uint64(1)
+        read_map.update(cg, s)
+
+    return c_int32(0)
+
+
+@bpf
+@section("kprobe/vfs_write")
+def trace_write(ctx1: struct_pt_regs) -> c_int32:
+    cg = get_current_cgroup_id()
+    count = c_uint64(ctx1.dx)
+    ptr = write_map.lookup(cg)
+
+    if ptr:
+        s = write_stats()
+        s.bytes = ptr.bytes + count
+        s.ops = ptr.ops + 1
+        write_map.update(cg, s)
+    else:
+        s = write_stats()
+        s.bytes = count
+        s.ops = c_uint64(1)
+        write_map.update(cg, s)
+
+    return c_int32(0)
+
+
+# ==================== Network I/O Tracing ====================
+
+
+@bpf
+@section("kprobe/__netif_receive_skb")
+def trace_netif_rx(ctx2: struct_pt_regs) -> c_int32:
+    cgroup_id = get_current_cgroup_id()
+    skb = struct_sk_buff(ctx2.di)
+    pkt_len = c_uint64(skb.len)
+
+    stats_ptr = net_stats_map.lookup(cgroup_id)
+
+    if stats_ptr:
+        stats = net_stats()
+        stats.rx_packets = stats_ptr.rx_packets + 1
+        stats.tx_packets = stats_ptr.tx_packets
+        stats.rx_bytes = stats_ptr.rx_bytes + pkt_len
+        stats.tx_bytes = stats_ptr.tx_bytes
+        net_stats_map.update(cgroup_id, stats)
+    else:
+        stats = net_stats()
+        stats.rx_packets = c_uint64(1)
+        stats.tx_packets = c_uint64(0)
+        stats.rx_bytes = pkt_len
+        stats.tx_bytes = c_uint64(0)
+        net_stats_map.update(cgroup_id, stats)
+
+    return c_int32(0)
+
+
+@bpf
+@section("kprobe/__dev_queue_xmit")
+def trace_dev_xmit(ctx3: struct_pt_regs) -> c_int32:
+    cgroup_id = get_current_cgroup_id()
+    skb = struct_sk_buff(ctx3.di)
+    pkt_len = c_uint64(skb.len)
+
+    stats_ptr = net_stats_map.lookup(cgroup_id)
+
+    if stats_ptr:
+        stats = net_stats()
+        stats.rx_packets = stats_ptr.rx_packets
+        stats.tx_packets = stats_ptr.tx_packets + 1
+        stats.rx_bytes = stats_ptr.rx_bytes
+        stats.tx_bytes = stats_ptr.tx_bytes + pkt_len
+        net_stats_map.update(cgroup_id, stats)
+    else:
+        stats = net_stats()
+        stats.rx_packets = c_uint64(0)
+        stats.tx_packets = c_uint64(1)
+        stats.rx_bytes = c_uint64(0)
+        stats.tx_bytes = pkt_len
+        net_stats_map.update(cgroup_id, stats)
+
+    return c_int32(0)
+
+
+# ==================== Syscall Tracing ====================
+
+
+@bpf
+@section("tracepoint/raw_syscalls/sys_enter")
+def count_syscalls(ctx: c_void_p) -> c_int32:
+    cgroup_id = get_current_cgroup_id()
+    count_ptr = syscall_count.lookup(cgroup_id)
+
+    if count_ptr:
+        new_count = count_ptr + c_uint64(1)
+        syscall_count.update(cgroup_id, new_count)
+    else:
+        syscall_count.update(cgroup_id, c_uint64(1))
+
+    return c_int32(0)
+
+
+@bpf
+@bpfglobal
+def LICENSE() -> str:
+    return "GPL"
+
+
+# ==================== Main ====================
+
+if __name__ == "__main__":
+    print("🔥 Loading BPF programs...")
+
+    # Load and attach BPF program
+    b = BPF()
+    b.load()
+    b.attach_all()
+
+    # Get map references and enable struct deserialization
+    read_map_ref = b["read_map"]
+    write_map_ref = b["write_map"]
+    net_stats_map_ref = b["net_stats_map"]
+    syscall_count_ref = b["syscall_count"]
+
+    read_map_ref.set_value_struct("read_stats")
+    write_map_ref.set_value_struct("write_stats")
+    net_stats_map_ref.set_value_struct("net_stats")
+
+    print("✅ BPF programs loaded and attached")
+
+    # Setup data collector
+    collector = ContainerDataCollector(
+        read_map_ref, write_map_ref, net_stats_map_ref, syscall_count_ref
+    )
+
+    # Create and run TUI
+    tui = ContainerMonitorTUI(collector)
+    tui.run()

examples/container-monitor/data_collection.py

@@ -0,0 +1,208 @@
+"""Data collection and management for container monitoring."""
+
+import os
+import time
+from pathlib import Path
+from typing import Dict, List, Set, Optional
+from dataclasses import dataclass
+from collections import deque, defaultdict
+
+
+@dataclass
+class CgroupInfo:
+    """Information about a cgroup."""
+
+    id: int
+    name: str
+    path: str
+
+
+@dataclass
+class ContainerStats:
+    """Statistics for a container/cgroup."""
+
+    cgroup_id: int
+    cgroup_name: str
+
+    # File I/O
+    read_ops: int = 0
+    read_bytes: int = 0
+    write_ops: int = 0
+    write_bytes: int = 0
+
+    # Network I/O
+    rx_packets: int = 0
+    rx_bytes: int = 0
+    tx_packets: int = 0
+    tx_bytes: int = 0
+
+    # Syscalls
+    syscall_count: int = 0
+
+    # Timestamp
+    timestamp: float = 0.0
+
+
+class ContainerDataCollector:
+    """Collects and manages container monitoring data from BPF."""
+
+    def __init__(
+        self, read_map, write_map, net_stats_map, syscall_map, history_size: int = 100
+    ):
+        self.read_map = read_map
+        self.write_map = write_map
+        self.net_stats_map = net_stats_map
+        self.syscall_map = syscall_map
+
+        # Caching
+        self._cgroup_cache: Dict[int, CgroupInfo] = {}
+        self._cgroup_cache_time = 0
+        self._cache_ttl = 5.0
+        0  # Refresh cache every 5 seconds
+
+        # Historical data for graphing
+        self._history_size = history_size
+        self._history: Dict[int, deque] = defaultdict(
+            lambda: deque(maxlen=history_size)
+        )
+
+    def get_all_cgroups(self) -> List[CgroupInfo]:
+        """Get all cgroups with caching."""
+        current_time = time.time()
+
+        # Use cached data if still valid
+        if current_time - self._cgroup_cache_time < self._cache_ttl:
+            return list(self._cgroup_cache.values())
+
+        # Refresh cache
+        self._refresh_cgroup_cache()
+        return list(self._cgroup_cache.values())
+
+    def _refresh_cgroup_cache(self):
+        """Refresh the cgroup cache from /proc."""
+        cgroup_map: Dict[int, Set[str]] = defaultdict(set)
+
+        # Scan /proc to find all cgroups
+        for proc_dir in Path("/proc").glob("[0-9]*"):
+            try:
+                cgroup_file = proc_dir / "cgroup"
+                if not cgroup_file.exists():
+                    continue
+
+                with open(cgroup_file) as f:
+                    for line in f:
+                        parts = line.strip().split(":")
+                        if len(parts) >= 3:
+                            cgroup_path = parts[2]
+                            cgroup_mount = f"/sys/fs/cgroup{cgroup_path}"
+
+                            if os.path.exists(cgroup_mount):
+                                stat_info = os.stat(cgroup_mount)
+                                cgroup_id = stat_info.st_ino
+                                cgroup_map[cgroup_id].add(cgroup_path)
+
+            except (PermissionError, FileNotFoundError, OSError):
+                continue
+
+        # Update cache with best names
+        new_cache = {}
+        for cgroup_id, paths in cgroup_map.items():
+            # Pick the most descriptive path
+            best_path = self._get_best_cgroup_path(paths)
+            name = self._get_cgroup_name(best_path)
+
+            new_cache[cgroup_id] = CgroupInfo(id=cgroup_id, name=name, path=best_path)
+
+        self._cgroup_cache = new_cache
+        self._cgroup_cache_time = time.time()
+
+    def _get_best_cgroup_path(self, paths: Set[str]) -> str:
+        """Select the most descriptive cgroup path."""
+        path_list = list(paths)
+
+        # Prefer paths with more components (more specific)
+        # Prefer paths containing docker, podman, etc.
+        for keyword in ["docker", "podman", "kubernetes", "k8s", "systemd"]:
+            for path in path_list:
+                if keyword in path.lower():
+                    return path
+
+        # Return longest path (most specific)
+        return max(path_list, key=lambda p: (len(p.split("/")), len(p)))
+
+    def _get_cgroup_name(self, path: str) -> str:
+        """Extract a friendly name from cgroup path."""
+        if not path or path == "/":
+            return "root"
+
+        # Remove leading/trailing slashes
+        path = path.strip("/")
+
+        # Try to extract container ID or service name
+        parts = path.split("/")
+
+        # For Docker: /docker/<container_id>
+        if "docker" in path.lower():
+            for i, part in enumerate(parts):
+                if part.lower() == "docker" and i + 1 < len(parts):
+                    container_id = parts[i + 1][:12]  # Short ID
+                    return f"docker:{container_id}"
+
+        # For systemd services
+        if "system.slice" in path:
+            for part in parts:
+                if part.endswith(".service"):
+                    return part.replace(".service", "")
+
+        # For user slices
+        if "user.slice" in path:
+            return f"user:{parts[-1]}" if parts else "user"
+
+        # Default: use last component
+        return parts[-1] if parts else path
+
+    def get_stats_for_cgroup(self, cgroup_id: int) -> ContainerStats:
+        """Get current statistics for a specific cgroup."""
+        cgroup_info = self._cgroup_cache.get(cgroup_id)
+        cgroup_name = cgroup_info.name if cgroup_info else f"cgroup-{cgroup_id}"
+
+        stats = ContainerStats(
+            cgroup_id=cgroup_id, cgroup_name=cgroup_name, timestamp=time.time()
+        )
+
+        # Get file I/O stats
+        read_stat = self.read_map.lookup(cgroup_id)
+        if read_stat:
+            stats.read_ops = int(read_stat.ops)
+            stats.read_bytes = int(read_stat.bytes)
+
+        write_stat = self.write_map.lookup(cgroup_id)
+        if write_stat:
+            stats.write_ops = int(write_stat.ops)
+            stats.write_bytes = int(write_stat.bytes)
+
+        # Get network stats
+        net_stat = self.net_stats_map.lookup(cgroup_id)
+        if net_stat:
+            stats.rx_packets = int(net_stat.rx_packets)
+            stats.rx_bytes = int(net_stat.rx_bytes)
+            stats.tx_packets = int(net_stat.tx_packets)
+            stats.tx_bytes = int(net_stat.tx_bytes)
+
+        # Get syscall count
+        syscall_cnt = self.syscall_map.lookup(cgroup_id)
+        if syscall_cnt is not None:
+            stats.syscall_count = int(syscall_cnt)
+
+        # Add to history
+        self._history[cgroup_id].append(stats)
+
+        return stats
+
+    def get_history(self, cgroup_id: int) -> List[ContainerStats]:
+        """Get historical statistics for graphing."""
+        return list(self._history[cgroup_id])
+
+    def get_cgroup_info(self, cgroup_id: int) -> Optional[CgroupInfo]:
+        """Get cached cgroup information."""
+        return self._cgroup_cache.get(cgroup_id)

examples/container-monitor/tui.py

@@ -0,0 +1,752 @@
+"""Terminal User Interface for container monitoring."""
+
+import time
+import curses
+import threading
+from typing import Optional, List
+from data_collection import ContainerDataCollector
+from web_dashboard import WebDashboard
+
+
+def _safe_addstr(stdscr, y: int, x: int, text: str, *args):
+    """Safely add string to screen with bounds checking."""
+    try:
+        height, width = stdscr.getmaxyx()
+        if 0 <= y < height and 0 <= x < width:
+            # Truncate text to fit
+            max_len = width - x - 1
+            if max_len > 0:
+                stdscr.addstr(y, x, text[:max_len], *args)
+    except curses.error:
+        pass
+
+
+def _draw_fancy_header(stdscr, title: str, subtitle: str):
+    """Draw a fancy header with title and subtitle."""
+    height, width = stdscr.getmaxyx()
+
+    # Top border
+    _safe_addstr(stdscr, 0, 0, "═" * width, curses.color_pair(6) | curses.A_BOLD)
+
+    # Title
+    _safe_addstr(
+        stdscr,
+        0,
+        max(0, (width - len(title)) // 2),
+        f" {title} ",
+        curses.color_pair(6) | curses.A_BOLD,
+    )
+
+    # Subtitle
+    _safe_addstr(
+        stdscr,
+        1,
+        max(0, (width - len(subtitle)) // 2),
+        subtitle,
+        curses.color_pair(1),
+    )
+
+    # Bottom border
+    _safe_addstr(stdscr, 2, 0, "═" * width, curses.color_pair(6))
+
+
+def _draw_metric_box(
+    stdscr,
+    y: int,
+    x: int,
+    width: int,
+    label: str,
+    value: str,
+    detail: str,
+    color_pair: int,
+):
+    """Draw a fancy box for displaying a metric."""
+    height, _ = stdscr.getmaxyx()
+
+    if y + 4 >= height:
+        return
+
+    # Top border
+    _safe_addstr(
+        stdscr, y, x, "┌" + "─" * (width - 2) + "┐", color_pair | curses.A_BOLD
+    )
+
+    # Label
+    _safe_addstr(stdscr, y + 1, x, "│", color_pair | curses.A_BOLD)
+    _safe_addstr(stdscr, y + 1, x + 2, label, color_pair | curses.A_BOLD)
+    _safe_addstr(stdscr, y + 1, x + width - 1, "│", color_pair | curses.A_BOLD)
+
+    # Value
+    _safe_addstr(stdscr, y + 2, x, "│", color_pair | curses.A_BOLD)
+    _safe_addstr(stdscr, y + 2, x + 4, value, curses.color_pair(2) | curses.A_BOLD)
+    _safe_addstr(
+        stdscr,
+        y + 2,
+        min(x + width - len(detail) - 3, x + width - 2),
+        detail,
+        color_pair | curses.A_BOLD,
+    )
+    _safe_addstr(stdscr, y + 2, x + width - 1, "│", color_pair | curses.A_BOLD)
+
+    # Bottom border
+    _safe_addstr(
+        stdscr, y + 3, x, "└" + "─" * (width - 2) + "┘", color_pair | curses.A_BOLD
+    )
+
+
+def _draw_section_header(stdscr, y: int, title: str, color_pair: int):
+    """Draw a section header."""
+    height, width = stdscr.getmaxyx()
+
+    if y >= height:
+        return
+
+    _safe_addstr(stdscr, y, 2, title, curses.color_pair(color_pair) | curses.A_BOLD)
+    _safe_addstr(
+        stdscr,
+        y,
+        len(title) + 3,
+        "─" * (width - len(title) - 5),
+        curses.color_pair(color_pair) | curses.A_BOLD,
+    )
+
+
+def _calculate_rates(history: List) -> dict:
+    """Calculate per-second rates from history."""
+    if len(history) < 2:
+        return {
+            "syscalls_per_sec": 0.0,
+            "rx_bytes_per_sec": 0.0,
+            "tx_bytes_per_sec": 0.0,
+            "rx_pkts_per_sec": 0.0,
+            "tx_pkts_per_sec": 0.0,
+            "read_bytes_per_sec": 0.0,
+            "write_bytes_per_sec": 0.0,
+            "read_ops_per_sec": 0.0,
+            "write_ops_per_sec": 0.0,
+        }
+
+    # Calculate delta between last two samples
+    recent = history[-1]
+    previous = history[-2]
+    time_delta = recent.timestamp - previous.timestamp
+
+    if time_delta <= 0:
+        time_delta = 1.0
+
+    return {
+        "syscalls_per_sec": (recent.syscall_count - previous.syscall_count)
+        / time_delta,
+        "rx_bytes_per_sec": (recent.rx_bytes - previous.rx_bytes) / time_delta,
+        "tx_bytes_per_sec": (recent.tx_bytes - previous.tx_bytes) / time_delta,
+        "rx_pkts_per_sec": (recent.rx_packets - previous.rx_packets) / time_delta,
+        "tx_pkts_per_sec": (recent.tx_packets - previous.tx_packets) / time_delta,
+        "read_bytes_per_sec": (recent.read_bytes - previous.read_bytes) / time_delta,
+        "write_bytes_per_sec": (recent.write_bytes - previous.write_bytes) / time_delta,
+        "read_ops_per_sec": (recent.read_ops - previous.read_ops) / time_delta,
+        "write_ops_per_sec": (recent.write_ops - previous.write_ops) / time_delta,
+    }
+
+
+def _format_bytes(bytes_val: float) -> str:
+    """Format bytes into human-readable string."""
+    if bytes_val < 0:
+        bytes_val = 0
+    for unit in ["B", "KB", "MB", "GB", "TB"]:
+        if bytes_val < 1024.0:
+            return f"{bytes_val:.1f}{unit}"
+        bytes_val /= 1024.0
+    return f"{bytes_val:.1f}PB"
+
+
+def _draw_bar_graph_enhanced(
+    stdscr,
+    y: int,
+    x: int,
+    width: int,
+    height: int,
+    data: List[float],
+    color_pair: int,
+):
+    """Draw an enhanced bar graph with axis and scale."""
+    screen_height, screen_width = stdscr.getmaxyx()
+
+    if not data or width < 2 or y + height >= screen_height:
+        return
+
+    # Calculate statistics
+    max_val = max(data) if max(data) > 0 else 1
+    min_val = min(data)
+    avg_val = sum(data) / len(data)
+
+    # Take last 'width - 12' data points (leave room for Y-axis)
+    graph_width = max(1, width - 12)
+    recent_data = data[-graph_width:] if len(data) > graph_width else data
+
+    # Draw Y-axis labels (with bounds checking)
+    if y < screen_height:
+        _safe_addstr(
+            stdscr, y, x, f"│{_format_bytes(max_val):>9}", curses.color_pair(7)
+        )
+    if y + height // 2 < screen_height:
+        _safe_addstr(
+            stdscr,
+            y + height // 2,
+            x,
+            f"│{_format_bytes(avg_val):>9}",
+            curses.color_pair(7),
+        )
+    if y + height - 1 < screen_height:
+        _safe_addstr(
+            stdscr,
+            y + height - 1,
+            x,
+            f"│{_format_bytes(min_val):>9}",
+            curses.color_pair(7),
+        )
+
+    # Draw bars
+    for row in range(height):
+        if y + row >= screen_height:
+            break
+
+        threshold = (height - row) / height
+        bar_line = ""
+
+        for val in recent_data:
+            normalized = val / max_val if max_val > 0 else 0
+            if normalized >= threshold:
+                bar_line += "█"
+            elif normalized >= threshold - 0.15:
+                bar_line += "▓"
+            elif normalized >= threshold - 0.35:
+                bar_line += "▒"
+            elif normalized >= threshold - 0.5:
+                bar_line += "░"
+            else:
+                bar_line += " "
+
+        _safe_addstr(stdscr, y + row, x + 11, bar_line, color_pair)
+
+    # Draw X-axis
+    if y + height < screen_height:
+        _safe_addstr(
+            stdscr,
+            y + height,
+            x + 10,
+            "├" + "─" * len(recent_data),
+            curses.color_pair(7),
+        )
+        _safe_addstr(
+            stdscr,
+            y + height,
+            x + 10 + len(recent_data),
+            "→ time",
+            curses.color_pair(7),
+        )
+
+
+def _draw_labeled_graph(
+    stdscr,
+    y: int,
+    x: int,
+    width: int,
+    height: int,
+    label: str,
+    rate: str,
+    detail: str,
+    data: List[float],
+    color_pair: int,
+    description: str,
+):
+    """Draw a graph with labels and legend."""
+    screen_height, screen_width = stdscr.getmaxyx()
+
+    if y >= screen_height or y + height + 2 >= screen_height:
+        return
+
+    # Header with metrics
+    _safe_addstr(stdscr, y, x, label, curses.color_pair(1) | curses.A_BOLD)
+    _safe_addstr(stdscr, y, x + len(label) + 2, rate, curses.color_pair(2))
+    _safe_addstr(
+        stdscr, y, x + len(label) + len(rate) + 4, detail, curses.color_pair(7)
+    )
+
+    # Draw the graph
+    if len(data) > 1:
+        _draw_bar_graph_enhanced(stdscr, y + 1, x, width, height, data, color_pair)
+    else:
+        _safe_addstr(stdscr, y + 2, x + 2, "Collecting data...", curses.color_pair(7))
+
+    # Graph legend
+    if y + height + 1 < screen_height:
+        _safe_addstr(
+            stdscr, y + height + 1, x, f"└─ {description}", curses.color_pair(7)
+        )
+
+
+class ContainerMonitorTUI:
+    """TUI for container monitoring with cgroup selection and live graphs."""
+
+    def __init__(self, collector: ContainerDataCollector):
+        self.collector = collector
+        self.selected_cgroup: Optional[int] = None
+        self.current_screen = "selection"  # "selection" or "monitoring"
+        self.selected_index = 0
+        self.scroll_offset = 0
+        self.web_dashboard = None
+        self.web_thread = None
+
+    def run(self):
+        """Run the TUI application."""
+        curses.wrapper(self._main_loop)
+
+    def _main_loop(self, stdscr):
+        """Main curses loop."""
+        # Configure curses
+        curses.curs_set(0)  # Hide cursor
+        stdscr.nodelay(True)  # Non-blocking input
+        stdscr.timeout(100)  # Refresh every 100ms
+
+        # Initialize colors
+        curses.start_color()
+        curses.init_pair(1, curses.COLOR_CYAN, curses.COLOR_BLACK)
+        curses.init_pair(2, curses.COLOR_GREEN, curses.COLOR_BLACK)
+        curses.init_pair(3, curses.COLOR_YELLOW, curses.COLOR_BLACK)
+        curses.init_pair(4, curses.COLOR_RED, curses.COLOR_BLACK)
+        curses.init_pair(5, curses.COLOR_MAGENTA, curses.COLOR_BLACK)
+        curses.init_pair(6, curses.COLOR_WHITE, curses.COLOR_BLUE)
+        curses.init_pair(7, curses.COLOR_BLUE, curses.COLOR_BLACK)
+        curses.init_pair(8, curses.COLOR_WHITE, curses.COLOR_CYAN)
+
+        while True:
+            stdscr.clear()
+
+            try:
+                height, width = stdscr.getmaxyx()
+
+                # Check minimum terminal size
+                if height < 25 or width < 80:
+                    msg = "Terminal too small!   Minimum: 80x25"
+                    stdscr.attron(curses.color_pair(4) | curses.A_BOLD)
+                    stdscr.addstr(
+                        height // 2, max(0, (width - len(msg)) // 2), msg[: width - 1]
+                    )
+                    stdscr.attroff(curses.color_pair(4) | curses.A_BOLD)
+                    stdscr.refresh()
+                    key = stdscr.getch()
+                    if key == ord("q") or key == ord("Q"):
+                        break
+                    continue
+
+                if self.current_screen == "selection":
+                    self._draw_selection_screen(stdscr)
+                elif self.current_screen == "monitoring":
+                    self._draw_monitoring_screen(stdscr)
+
+                stdscr.refresh()
+
+                # Handle input
+                key = stdscr.getch()
+                if key != -1:
+                    if not self._handle_input(key, stdscr):
+                        break  # Exit requested
+
+            except KeyboardInterrupt:
+                break
+            except curses.error:
+                # Curses error - likely terminal too small, just continue
+                pass
+            except Exception as e:
+                # Show error briefly
+                height, width = stdscr.getmaxyx()
+                error_msg = f"Error: {str(e)[: width - 10]}"
+                stdscr.addstr(0, 0, error_msg[: width - 1])
+                stdscr.refresh()
+                time.sleep(1)
+
+    def _draw_selection_screen(self, stdscr):
+        """Draw the cgroup selection screen."""
+        height, width = stdscr.getmaxyx()
+
+        # Draw fancy header box
+        _draw_fancy_header(stdscr, "🐳 CONTAINER MONITOR", "Select a Cgroup to Monitor")
+
+        # Instructions
+        instructions = (
+            "↑↓: Navigate | ENTER: Select | w: Web Mode | q: Quit | r: Refresh"
+        )
+        _safe_addstr(
+            stdscr,
+            3,
+            max(0, (width - len(instructions)) // 2),
+            instructions,
+            curses.color_pair(3),
+        )
+
+        # Get cgroups
+        cgroups = self.collector.get_all_cgroups()
+
+        if not cgroups:
+            msg = "No cgroups found. Waiting for activity..."
+            _safe_addstr(
+                stdscr,
+                height // 2,
+                max(0, (width - len(msg)) // 2),
+                msg,
+                curses.color_pair(4),
+            )
+            return
+
+        # Sort cgroups by name
+        cgroups.sort(key=lambda c: c.name)
+
+        # Adjust selection bounds
+        if self.selected_index >= len(cgroups):
+            self.selected_index = len(cgroups) - 1
+        if self.selected_index < 0:
+            self.selected_index = 0
+
+        # Calculate visible range
+        list_height = max(1, height - 8)
+        if self.selected_index < self.scroll_offset:
+            self.scroll_offset = self.selected_index
+        elif self.selected_index >= self.scroll_offset + list_height:
+            self.scroll_offset = self.selected_index - list_height + 1
+
+        # Calculate max name length and ID width for alignment
+        max_name_len = min(50, max(len(cg.name) for cg in cgroups))
+        max_id_len = max(len(str(cg.id)) for cg in cgroups)
+
+        # Draw cgroup list with fancy borders
+        start_y = 5
+        _safe_addstr(
+            stdscr, start_y, 2, "╔" + "═" * (width - 6) + "╗", curses.color_pair(1)
+        )
+
+        # Header row
+        header = f"   {'CGROUP NAME':<{max_name_len}} │ {'ID':>{max_id_len}} "
+        _safe_addstr(stdscr, start_y + 1, 2, "║", curses.color_pair(1))
+        _safe_addstr(
+            stdscr, start_y + 1, 3, header, curses.color_pair(1) | curses.A_BOLD
+        )
+        _safe_addstr(stdscr, start_y + 1, width - 3, "║", curses.color_pair(1))
+
+        # Separator
+        _safe_addstr(
+            stdscr, start_y + 2, 2, "╟" + "─" * (width - 6) + "╢", curses.color_pair(1)
+        )
+
+        for i in range(list_height):
+            idx = self.scroll_offset + i
+            y = start_y + 3 + i
+
+            if y >= height - 2:
+                break
+
+            _safe_addstr(stdscr, y, 2, "║", curses.color_pair(1))
+            _safe_addstr(stdscr, y, width - 3, "║", curses.color_pair(1))
+
+            if idx >= len(cgroups):
+                continue
+
+            cgroup = cgroups[idx]
+
+            # Truncate name if too long
+            display_name = (
+                cgroup.name
+                if len(cgroup.name) <= max_name_len
+                else cgroup.name[: max_name_len - 3] + "..."
+            )
+
+            if idx == self.selected_index:
+                # Highlight selected with proper alignment
+                line = f" ► {display_name:<{max_name_len}} │ {cgroup.id:>{max_id_len}} "
+                _safe_addstr(stdscr, y, 3, line, curses.color_pair(8) | curses.A_BOLD)
+            else:
+                line = f"   {display_name:<{max_name_len}} │ {cgroup.id:>{max_id_len}} "
+                _safe_addstr(stdscr, y, 3, line, curses.color_pair(7))
+
+        # Bottom border
+        bottom_y = min(start_y + 3 + list_height, height - 3)
+        _safe_addstr(
+            stdscr, bottom_y, 2, "╚" + "═" * (width - 6) + "╝", curses.color_pair(1)
+        )
+
+        # Footer
+        footer = f"Total: {len(cgroups)} cgroups"
+        if len(cgroups) > list_height:
+            footer += f" │ Showing {self.scroll_offset + 1}-{min(self.scroll_offset + list_height, len(cgroups))}"
+        _safe_addstr(
+            stdscr,
+            height - 2,
+            max(0, (width - len(footer)) // 2),
+            footer,
+            curses.color_pair(1),
+        )
+
+    def _draw_monitoring_screen(self, stdscr):
+        """Draw the monitoring screen for selected cgroup."""
+        height, width = stdscr.getmaxyx()
+
+        if self.selected_cgroup is None:
+            return
+
+        # Get current stats
+        stats = self.collector.get_stats_for_cgroup(self.selected_cgroup)
+        history = self.collector.get_history(self.selected_cgroup)
+
+        # Draw fancy header
+        _draw_fancy_header(
+            stdscr, f"📊 {stats.cgroup_name[:40]}", "Live Performance Metrics"
+        )
+
+        # Instructions
+        instructions = "ESC/b: Back to List | w: Web Mode | q: Quit"
+        _safe_addstr(
+            stdscr,
+            3,
+            max(0, (width - len(instructions)) // 2),
+            instructions,
+            curses.color_pair(3),
+        )
+
+        # Calculate metrics for rate display
+        rates = _calculate_rates(history)
+
+        y = 5
+
+        # Syscall count in a fancy box
+        if y + 4 < height:
+            _draw_metric_box(
+                stdscr,
+                y,
+                2,
+                min(width - 4, 80),
+                "⚡ SYSTEM CALLS",
+                f"{stats.syscall_count:,}",
+                f"Rate: {rates['syscalls_per_sec']:.1f}/sec",
+                curses.color_pair(5),
+            )
+        y += 4
+
+        # Network I/O Section
+        if y + 8 < height:
+            _draw_section_header(stdscr, y, "🌐 NETWORK I/O", 1)
+            y += 1
+
+            # RX graph
+            rx_label = f"RX: {_format_bytes(stats.rx_bytes)}"
+            rx_rate = f"{_format_bytes(rates['rx_bytes_per_sec'])}/s"
+            rx_pkts = f"{stats.rx_packets:,} pkts ({rates['rx_pkts_per_sec']:.1f}/s)"
+
+            _draw_labeled_graph(
+                stdscr,
+                y,
+                2,
+                width - 4,
+                4,
+                rx_label,
+                rx_rate,
+                rx_pkts,
+                [s.rx_bytes for s in history],
+                curses.color_pair(2),
+                "Received Traffic (last 100 samples)",
+            )
+            y += 6
+
+        # TX graph
+        if y + 8 < height:
+            tx_label = f"TX: {_format_bytes(stats.tx_bytes)}"
+            tx_rate = f"{_format_bytes(rates['tx_bytes_per_sec'])}/s"
+            tx_pkts = f"{stats.tx_packets:,} pkts ({rates['tx_pkts_per_sec']:.1f}/s)"
+
+            _draw_labeled_graph(
+                stdscr,
+                y,
+                2,
+                width - 4,
+                4,
+                tx_label,
+                tx_rate,
+                tx_pkts,
+                [s.tx_bytes for s in history],
+                curses.color_pair(3),
+                "Transmitted Traffic (last 100 samples)",
+            )
+            y += 6
+
+        # File I/O Section
+        if y + 8 < height:
+            _draw_section_header(stdscr, y, "💾 FILE I/O", 1)
+            y += 1
+
+            # Read graph
+            read_label = f"READ: {_format_bytes(stats.read_bytes)}"
+            read_rate = f"{_format_bytes(rates['read_bytes_per_sec'])}/s"
+            read_ops = f"{stats.read_ops:,} ops ({rates['read_ops_per_sec']:.1f}/s)"
+
+            _draw_labeled_graph(
+                stdscr,
+                y,
+                2,
+                width - 4,
+                4,
+                read_label,
+                read_rate,
+                read_ops,
+                [s.read_bytes for s in history],
+                curses.color_pair(4),
+                "Read Operations (last 100 samples)",
+            )
+            y += 6
+
+        # Write graph
+        if y + 8 < height:
+            write_label = f"WRITE: {_format_bytes(stats.write_bytes)}"
+            write_rate = f"{_format_bytes(rates['write_bytes_per_sec'])}/s"
+            write_ops = f"{stats.write_ops:,} ops ({rates['write_ops_per_sec']:.1f}/s)"
+
+            _draw_labeled_graph(
+                stdscr,
+                y,
+                2,
+                width - 4,
+                4,
+                write_label,
+                write_rate,
+                write_ops,
+                [s.write_bytes for s in history],
+                curses.color_pair(5),
+                "Write Operations (last 100 samples)",
+            )
+
+    def _launch_web_mode(self, stdscr):
+        """Launch web dashboard mode."""
+        height, width = stdscr.getmaxyx()
+
+        # Show transition message
+        stdscr.clear()
+
+        msg1 = "🌐 LAUNCHING WEB DASHBOARD"
+        _safe_addstr(
+            stdscr,
+            height // 2 - 2,
+            max(0, (width - len(msg1)) // 2),
+            msg1,
+            curses.color_pair(6) | curses.A_BOLD,
+        )
+
+        msg2 = "Server starting at http://localhost:8050"
+        _safe_addstr(
+            stdscr,
+            height // 2,
+            max(0, (width - len(msg2)) // 2),
+            msg2,
+            curses.color_pair(2),
+        )
+
+        msg3 = "Press 'q' to stop web server and return to TUI"
+        _safe_addstr(
+            stdscr,
+            height // 2 + 2,
+            max(0, (width - len(msg3)) // 2),
+            msg3,
+            curses.color_pair(3),
+        )
+
+        stdscr.refresh()
+        time.sleep(1)
+
+        try:
+            # Create and start web dashboard
+            self.web_dashboard = WebDashboard(
+                self.collector, selected_cgroup=self.selected_cgroup
+            )
+
+            # Start in background thread
+            self.web_thread = threading.Thread(
+                target=self.web_dashboard.run, daemon=True
+            )
+            self.web_thread.start()
+
+            time.sleep(2)  # Give server time to start
+
+            # Wait for user to press 'q' to return
+            msg4 = "Web dashboard running at http://localhost:8050"
+            msg5 = "Press 'q' to return to TUI"
+            _safe_addstr(
+                stdscr,
+                height // 2 + 4,
+                max(0, (width - len(msg4)) // 2),
+                msg4,
+                curses.color_pair(1) | curses.A_BOLD,
+            )
+            _safe_addstr(
+                stdscr,
+                height // 2 + 5,
+                max(0, (width - len(msg5)) // 2),
+                msg5,
+                curses.color_pair(3) | curses.A_BOLD,
+            )
+            stdscr.refresh()
+
+            stdscr.nodelay(False)  # Blocking mode
+            while True:
+                key = stdscr.getch()
+                if key == ord("q") or key == ord("Q"):
+                    break
+
+            # Stop web server
+            if self.web_dashboard:
+                self.web_dashboard.stop()
+
+        except Exception as e:
+            error_msg = f"Error starting web dashboard: {str(e)}"
+            _safe_addstr(
+                stdscr,
+                height // 2 + 4,
+                max(0, (width - len(error_msg)) // 2),
+                error_msg,
+                curses.color_pair(4),
+            )
+            stdscr.refresh()
+            time.sleep(3)
+
+        # Restore TUI settings
+        stdscr.nodelay(True)
+        stdscr.timeout(100)
+
+    def _handle_input(self, key: int, stdscr) -> bool:
+        """Handle keyboard input. Returns False to exit."""
+        if key == ord("q") or key == ord("Q"):
+            return False  # Exit
+
+        if key == ord("w") or key == ord("W"):
+            # Launch web mode
+            self._launch_web_mode(stdscr)
+            return True
+
+        if self.current_screen == "selection":
+            if key == curses.KEY_UP:
+                self.selected_index = max(0, self.selected_index - 1)
+            elif key == curses.KEY_DOWN:
+                cgroups = self.collector.get_all_cgroups()
+                self.selected_index = min(len(cgroups) - 1, self.selected_index + 1)
+            elif key == ord("\n") or key == curses.KEY_ENTER or key == 10:
+                # Select cgroup
+                cgroups = self.collector.get_all_cgroups()
+                if cgroups and 0 <= self.selected_index < len(cgroups):
+                    cgroups.sort(key=lambda c: c.name)
+                    self.selected_cgroup = cgroups[self.selected_index].id
+                    self.current_screen = "monitoring"
+            elif key == ord("r") or key == ord("R"):
+                # Force refresh cache
+                self.collector._cgroup_cache_time = 0
+
+        elif self.current_screen == "monitoring":
+            if key == 27 or key == ord("b") or key == ord("B"):  # ESC or 'b'
+                self.current_screen = "selection"
+                self.selected_cgroup = None
+
+        return True  # Continue running

examples/container-monitor/web_dashboard.py

@@ -0,0 +1,826 @@
+"""Beautiful web dashboard for container monitoring using Plotly Dash."""
+
+import dash
+from dash import dcc, html
+from dash.dependencies import Input, Output
+import plotly.graph_objects as go
+from plotly.subplots import make_subplots
+from typing import Optional
+from data_collection import ContainerDataCollector
+
+
+class WebDashboard:
+    """Beautiful web dashboard for container monitoring."""
+
+    def __init__(
+        self,
+        collector: ContainerDataCollector,
+        selected_cgroup: Optional[int] = None,
+        host: str = "0.0.0.0",
+        port: int = 8050,
+    ):
+        self.collector = collector
+        self.selected_cgroup = selected_cgroup
+        self.host = host
+        self.port = port
+
+        # Suppress Dash dev tools and debug output
+        self.app = dash.Dash(
+            __name__,
+            title="pythonBPF Container Monitor",
+            suppress_callback_exceptions=True,
+        )
+
+        self._setup_layout()
+        self._setup_callbacks()
+        self._running = False
+
+    def _setup_layout(self):
+        """Create the dashboard layout."""
+        self.app.layout = html.Div(
+            [
+                # Futuristic Header with pythonBPF branding
+                html.Div(
+                    [
+                        html.Div(
+                            [
+                                html.Div(
+                                    [
+                                        html.Span(
+                                            "python",
+                                            style={
+                                                "fontSize": "52px",
+                                                "fontWeight": "300",
+                                                "color": "#00ff88",
+                                                "fontFamily": "'Courier New', monospace",
+                                                "textShadow": "0 0 20px rgba(0,255,136,0.5)",
+                                            },
+                                        ),
+                                        html.Span(
+                                            "BPF",
+                                            style={
+                                                "fontSize": "52px",
+                                                "fontWeight": "900",
+                                                "color": "#00d4ff",
+                                                "fontFamily": "'Courier New', monospace",
+                                                "textShadow": "0 0 20px rgba(0,212,255,0.5)",
+                                            },
+                                        ),
+                                    ],
+                                    style={"marginBottom": "5px"},
+                                ),
+                                html.Div(
+                                    "CONTAINER PERFORMANCE MONITOR",
+                                    style={
+                                        "fontSize": "16px",
+                                        "letterSpacing": "8px",
+                                        "color": "#8899ff",
+                                        "fontWeight": "300",
+                                        "fontFamily": "'Courier New', monospace",
+                                    },
+                                ),
+                            ],
+                            style={
+                                "textAlign": "center",
+                            },
+                        ),
+                        html.Div(
+                            id="cgroup-name",
+                            style={
+                                "textAlign": "center",
+                                "color": "#00ff88",
+                                "fontSize": "20px",
+                                "marginTop": "15px",
+                                "fontFamily": "'Courier New', monospace",
+                                "fontWeight": "bold",
+                                "textShadow": "0 0 10px rgba(0,255,136,0.3)",
+                            },
+                        ),
+                    ],
+                    style={
+                        "background": "linear-gradient(135deg, #0a0e27 0%, #1a1f3a 50%, #0a0e27 100%)",
+                        "padding": "40px 20px",
+                        "borderRadius": "0",
+                        "marginBottom": "0",
+                        "boxShadow": "0 10px 40px rgba(0,212,255,0.2)",
+                        "border": "1px solid rgba(0,212,255,0.3)",
+                        "borderTop": "3px solid #00d4ff",
+                        "borderBottom": "3px solid #00ff88",
+                        "position": "relative",
+                        "overflow": "hidden",
+                    },
+                ),
+                # Cgroup selector (if no cgroup selected)
+                html.Div(
+                    [
+                        html.Label(
+                            "SELECT CGROUP:",
+                            style={
+                                "fontSize": "14px",
+                                "fontWeight": "bold",
+                                "color": "#00d4ff",
+                                "marginRight": "15px",
+                                "fontFamily": "'Courier New', monospace",
+                                "letterSpacing": "2px",
+                            },
+                        ),
+                        dcc.Dropdown(
+                            id="cgroup-selector",
+                            style={
+                                "width": "600px",
+                                "display": "inline-block",
+                                "background": "#1a1f3a",
+                                "border": "1px solid #00d4ff",
+                            },
+                        ),
+                    ],
+                    id="selector-container",
+                    style={
+                        "textAlign": "center",
+                        "marginTop": "30px",
+                        "marginBottom": "30px",
+                        "padding": "20px",
+                        "background": "rgba(26,31,58,0.5)",
+                        "borderRadius": "10px",
+                        "border": "1px solid rgba(0,212,255,0.2)",
+                        "display": "block" if self.selected_cgroup is None else "none",
+                    },
+                ),
+                # Stats cards row
+                html.Div(
+                    [
+                        self._create_stat_card(
+                            "syscall-card", "⚡ SYSCALLS", "#00ff88"
+                        ),
+                        self._create_stat_card("network-card", "🌐 NETWORK", "#00d4ff"),
+                        self._create_stat_card("file-card", "💾 FILE I/O", "#ff0088"),
+                    ],
+                    style={
+                        "display": "flex",
+                        "justifyContent": "space-around",
+                        "marginBottom": "30px",
+                        "marginTop": "30px",
+                        "gap": "25px",
+                        "flexWrap": "wrap",
+                        "padding": "0 20px",
+                    },
+                ),
+                # Graphs container
+                html.Div(
+                    [
+                        # Network graphs
+                        html.Div(
+                            [
+                                html.Div(
+                                    [
+                                        html.Span("🌐 ", style={"fontSize": "24px"}),
+                                        html.Span(
+                                            "NETWORK",
+                                            style={
+                                                "fontFamily": "'Courier New', monospace",
+                                                "letterSpacing": "3px",
+                                                "fontWeight": "bold",
+                                            },
+                                        ),
+                                        html.Span(
+                                            " I/O",
+                                            style={
+                                                "fontFamily": "'Courier New', monospace",
+                                                "letterSpacing": "3px",
+                                                "color": "#00d4ff",
+                                            },
+                                        ),
+                                    ],
+                                    style={
+                                        "color": "#ffffff",
+                                        "fontSize": "20px",
+                                        "borderBottom": "2px solid #00d4ff",
+                                        "paddingBottom": "15px",
+                                        "marginBottom": "25px",
+                                        "textShadow": "0 0 10px rgba(0,212,255,0.3)",
+                                    },
+                                ),
+                                dcc.Graph(
+                                    id="network-graph", style={"height": "400px"}
+                                ),
+                            ],
+                            style={
+                                "background": "linear-gradient(135deg, #0a0e27 0%, #1a1f3a 100%)",
+                                "padding": "30px",
+                                "borderRadius": "15px",
+                                "boxShadow": "0 8px 32px rgba(0,212,255,0.15)",
+                                "marginBottom": "30px",
+                                "border": "1px solid rgba(0,212,255,0.2)",
+                            },
+                        ),
+                        # File I/O graphs
+                        html.Div(
+                            [
+                                html.Div(
+                                    [
+                                        html.Span("💾 ", style={"fontSize": "24px"}),
+                                        html.Span(
+                                            "FILE",
+                                            style={
+                                                "fontFamily": "'Courier New', monospace",
+                                                "letterSpacing": "3px",
+                                                "fontWeight": "bold",
+                                            },
+                                        ),
+                                        html.Span(
+                                            " I/O",
+                                            style={
+                                                "fontFamily": "'Courier New', monospace",
+                                                "letterSpacing": "3px",
+                                                "color": "#ff0088",
+                                            },
+                                        ),
+                                    ],
+                                    style={
+                                        "color": "#ffffff",
+                                        "fontSize": "20px",
+                                        "borderBottom": "2px solid #ff0088",
+                                        "paddingBottom": "15px",
+                                        "marginBottom": "25px",
+                                        "textShadow": "0 0 10px rgba(255,0,136,0.3)",
+                                    },
+                                ),
+                                dcc.Graph(
+                                    id="file-io-graph", style={"height": "400px"}
+                                ),
+                            ],
+                            style={
+                                "background": "linear-gradient(135deg, #0a0e27 0%, #1a1f3a 100%)",
+                                "padding": "30px",
+                                "borderRadius": "15px",
+                                "boxShadow": "0 8px 32px rgba(255,0,136,0.15)",
+                                "marginBottom": "30px",
+                                "border": "1px solid rgba(255,0,136,0.2)",
+                            },
+                        ),
+                        # Combined time series
+                        html.Div(
+                            [
+                                html.Div(
+                                    [
+                                        html.Span("📈 ", style={"fontSize": "24px"}),
+                                        html.Span(
+                                            "REAL-TIME",
+                                            style={
+                                                "fontFamily": "'Courier New', monospace",
+                                                "letterSpacing": "3px",
+                                                "fontWeight": "bold",
+                                            },
+                                        ),
+                                        html.Span(
+                                            " METRICS",
+                                            style={
+                                                "fontFamily": "'Courier New', monospace",
+                                                "letterSpacing": "3px",
+                                                "color": "#00ff88",
+                                            },
+                                        ),
+                                    ],
+                                    style={
+                                        "color": "#ffffff",
+                                        "fontSize": "20px",
+                                        "borderBottom": "2px solid #00ff88",
+                                        "paddingBottom": "15px",
+                                        "marginBottom": "25px",
+                                        "textShadow": "0 0 10px rgba(0,255,136,0.3)",
+                                    },
+                                ),
+                                dcc.Graph(
+                                    id="timeseries-graph", style={"height": "500px"}
+                                ),
+                            ],
+                            style={
+                                "background": "linear-gradient(135deg, #0a0e27 0%, #1a1f3a 100%)",
+                                "padding": "30px",
+                                "borderRadius": "15px",
+                                "boxShadow": "0 8px 32px rgba(0,255,136,0.15)",
+                                "border": "1px solid rgba(0,255,136,0.2)",
+                            },
+                        ),
+                    ],
+                    style={"padding": "0 20px"},
+                ),
+                # Footer with pythonBPF branding
+                html.Div(
+                    [
+                        html.Div(
+                            [
+                                html.Span(
+                                    "Powered by ",
+                                    style={"color": "#8899ff", "fontSize": "12px"},
+                                ),
+                                html.Span(
+                                    "pythonBPF",
+                                    style={
+                                        "color": "#00d4ff",
+                                        "fontSize": "14px",
+                                        "fontWeight": "bold",
+                                        "fontFamily": "'Courier New', monospace",
+                                    },
+                                ),
+                                html.Span(
+                                    " | eBPF Container Monitoring",
+                                    style={
+                                        "color": "#8899ff",
+                                        "fontSize": "12px",
+                                        "marginLeft": "10px",
+                                    },
+                                ),
+                            ]
+                        )
+                    ],
+                    style={
+                        "textAlign": "center",
+                        "padding": "20px",
+                        "marginTop": "40px",
+                        "background": "linear-gradient(135deg, #0a0e27 0%, #1a1f3a 100%)",
+                        "borderTop": "1px solid rgba(0,212,255,0.2)",
+                    },
+                ),
+                # Auto-update interval
+                dcc.Interval(id="interval-component", interval=1000, n_intervals=0),
+            ],
+            style={
+                "padding": "0",
+                "fontFamily": "'Segoe UI', 'Courier New', monospace",
+                "background": "linear-gradient(to bottom, #050813 0%, #0a0e27 100%)",
+                "minHeight": "100vh",
+                "margin": "0",
+            },
+        )
+
+    def _create_stat_card(self, card_id: str, title: str, color: str):
+        """Create a statistics card with futuristic styling."""
+        return html.Div(
+            [
+                html.H3(
+                    title,
+                    style={
+                        "color": color,
+                        "fontSize": "16px",
+                        "marginBottom": "20px",
+                        "fontWeight": "bold",
+                        "fontFamily": "'Courier New', monospace",
+                        "letterSpacing": "2px",
+                        "textShadow": f"0 0 10px {color}50",
+                    },
+                ),
+                html.Div(
+                    [
+                        html.Div(
+                            id=f"{card_id}-value",
+                            style={
+                                "fontSize": "42px",
+                                "fontWeight": "bold",
+                                "color": "#ffffff",
+                                "marginBottom": "10px",
+                                "fontFamily": "'Courier New', monospace",
+                                "textShadow": f"0 0 20px {color}40",
+                            },
+                        ),
+                        html.Div(
+                            id=f"{card_id}-rate",
+                            style={
+                                "fontSize": "14px",
+                                "color": "#8899ff",
+                                "fontFamily": "'Courier New', monospace",
+                            },
+                        ),
+                    ]
+                ),
+            ],
+            style={
+                "flex": "1",
+                "minWidth": "280px",
+                "background": "linear-gradient(135deg, #0a0e27 0%, #1a1f3a 100%)",
+                "padding": "30px",
+                "borderRadius": "15px",
+                "boxShadow": f"0 8px 32px {color}20",
+                "border": f"1px solid {color}40",
+                "borderLeft": f"4px solid {color}",
+                "transition": "transform 0.3s, box-shadow 0.3s",
+                "position": "relative",
+                "overflow": "hidden",
+            },
+        )
+
+    def _setup_callbacks(self):
+        """Setup dashboard callbacks."""
+
+        @self.app.callback(
+            [Output("cgroup-selector", "options"), Output("cgroup-selector", "value")],
+            [Input("interval-component", "n_intervals")],
+        )
+        def update_cgroup_selector(n):
+            if self.selected_cgroup is not None:
+                return [], self.selected_cgroup
+
+            cgroups = self.collector.get_all_cgroups()
+            options = [
+                {"label": f"{cg.name} (ID: {cg.id})", "value": cg.id}
+                for cg in sorted(cgroups, key=lambda c: c.name)
+            ]
+            value = options[0]["value"] if options else None
+
+            if value and self.selected_cgroup is None:
+                self.selected_cgroup = value
+
+            return options, self.selected_cgroup
+
+        @self.app.callback(
+            Output("cgroup-selector", "value", allow_duplicate=True),
+            [Input("cgroup-selector", "value")],
+            prevent_initial_call=True,
+        )
+        def select_cgroup(value):
+            if value:
+                self.selected_cgroup = value
+            return value
+
+        @self.app.callback(
+            [
+                Output("cgroup-name", "children"),
+                Output("syscall-card-value", "children"),
+                Output("syscall-card-rate", "children"),
+                Output("network-card-value", "children"),
+                Output("network-card-rate", "children"),
+                Output("file-card-value", "children"),
+                Output("file-card-rate", "children"),
+                Output("network-graph", "figure"),
+                Output("file-io-graph", "figure"),
+                Output("timeseries-graph", "figure"),
+            ],
+            [Input("interval-component", "n_intervals")],
+        )
+        def update_dashboard(n):
+            if self.selected_cgroup is None:
+                empty_fig = self._create_empty_figure(
+                    "Select a cgroup to begin monitoring"
+                )
+                return (
+                    "SELECT A CGROUP TO START",
+                    "0",
+                    "",
+                    "0 B",
+                    "",
+                    "0 B",
+                    "",
+                    empty_fig,
+                    empty_fig,
+                    empty_fig,
+                )
+
+            try:
+                stats = self.collector.get_stats_for_cgroup(self.selected_cgroup)
+                history = self.collector.get_history(self.selected_cgroup)
+                rates = self._calculate_rates(history)
+
+                return (
+                    f"► {stats.cgroup_name}",
+                    f"{stats.syscall_count:,}",
+                    f"{rates['syscalls_per_sec']:.1f} calls/sec",
+                    f"{self._format_bytes(stats.rx_bytes + stats.tx_bytes)}",
+                    f"↓ {self._format_bytes(rates['rx_bytes_per_sec'])}/s  ↑ {self._format_bytes(rates['tx_bytes_per_sec'])}/s",
+                    f"{self._format_bytes(stats.read_bytes + stats.write_bytes)}",
+                    f"R: {self._format_bytes(rates['read_bytes_per_sec'])}/s  W: {self._format_bytes(rates['write_bytes_per_sec'])}/s",
+                    self._create_network_graph(history),
+                    self._create_file_io_graph(history),
+                    self._create_timeseries_graph(history),
+                )
+            except Exception as e:
+                empty_fig = self._create_empty_figure(f"Error: {str(e)}")
+                return (
+                    "ERROR",
+                    "0",
+                    str(e),
+                    "0 B",
+                    "",
+                    "0 B",
+                    "",
+                    empty_fig,
+                    empty_fig,
+                    empty_fig,
+                )
+
+    def _create_empty_figure(self, message: str):
+        """Create an empty figure with a message."""
+        fig = go.Figure()
+        fig.update_layout(
+            title=message,
+            template="plotly_dark",
+            paper_bgcolor="#0a0e27",
+            plot_bgcolor="#0a0e27",
+            font=dict(color="#8899ff", family="Courier New, monospace"),
+        )
+        return fig
+
+    def _create_network_graph(self, history):
+        """Create network I/O graph with futuristic styling."""
+        if len(history) < 2:
+            return self._create_empty_figure("Collecting data...")
+
+        times = [i for i in range(len(history))]
+        rx_bytes = [s.rx_bytes for s in history]
+        tx_bytes = [s.tx_bytes for s in history]
+
+        fig = make_subplots(
+            rows=2,
+            cols=1,
+            subplot_titles=("RECEIVED (RX)", "TRANSMITTED (TX)"),
+            vertical_spacing=0.15,
+        )
+
+        fig.add_trace(
+            go.Scatter(
+                x=times,
+                y=rx_bytes,
+                mode="lines",
+                name="RX",
+                fill="tozeroy",
+                line=dict(color="#00d4ff", width=3, shape="spline"),
+                fillcolor="rgba(0, 212, 255, 0.2)",
+            ),
+            row=1,
+            col=1,
+        )
+
+        fig.add_trace(
+            go.Scatter(
+                x=times,
+                y=tx_bytes,
+                mode="lines",
+                name="TX",
+                fill="tozeroy",
+                line=dict(color="#00ff88", width=3, shape="spline"),
+                fillcolor="rgba(0, 255, 136, 0.2)",
+            ),
+            row=2,
+            col=1,
+        )
+
+        fig.update_xaxes(title_text="Time (samples)", row=2, col=1, color="#8899ff")
+        fig.update_yaxes(title_text="Bytes", row=1, col=1, color="#8899ff")
+        fig.update_yaxes(title_text="Bytes", row=2, col=1, color="#8899ff")
+
+        fig.update_layout(
+            height=400,
+            template="plotly_dark",
+            paper_bgcolor="rgba(0,0,0,0)",
+            plot_bgcolor="#0a0e27",
+            showlegend=False,
+            hovermode="x unified",
+            font=dict(family="Courier New, monospace", color="#8899ff"),
+        )
+
+        return fig
+
+    def _create_file_io_graph(self, history):
+        """Create file I/O graph with futuristic styling."""
+        if len(history) < 2:
+            return self._create_empty_figure("Collecting data...")
+
+        times = [i for i in range(len(history))]
+        read_bytes = [s.read_bytes for s in history]
+        write_bytes = [s.write_bytes for s in history]
+
+        fig = make_subplots(
+            rows=2,
+            cols=1,
+            subplot_titles=("READ OPERATIONS", "WRITE OPERATIONS"),
+            vertical_spacing=0.15,
+        )
+
+        fig.add_trace(
+            go.Scatter(
+                x=times,
+                y=read_bytes,
+                mode="lines",
+                name="Read",
+                fill="tozeroy",
+                line=dict(color="#ff0088", width=3, shape="spline"),
+                fillcolor="rgba(255, 0, 136, 0.2)",
+            ),
+            row=1,
+            col=1,
+        )
+
+        fig.add_trace(
+            go.Scatter(
+                x=times,
+                y=write_bytes,
+                mode="lines",
+                name="Write",
+                fill="tozeroy",
+                line=dict(color="#8844ff", width=3, shape="spline"),
+                fillcolor="rgba(136, 68, 255, 0.2)",
+            ),
+            row=2,
+            col=1,
+        )
+
+        fig.update_xaxes(title_text="Time (samples)", row=2, col=1, color="#8899ff")
+        fig.update_yaxes(title_text="Bytes", row=1, col=1, color="#8899ff")
+        fig.update_yaxes(title_text="Bytes", row=2, col=1, color="#8899ff")
+
+        fig.update_layout(
+            height=400,
+            template="plotly_dark",
+            paper_bgcolor="rgba(0,0,0,0)",
+            plot_bgcolor="#0a0e27",
+            showlegend=False,
+            hovermode="x unified",
+            font=dict(family="Courier New, monospace", color="#8899ff"),
+        )
+
+        return fig
+
+    def _create_timeseries_graph(self, history):
+        """Create combined time series graph with futuristic styling."""
+        if len(history) < 2:
+            return self._create_empty_figure("Collecting data...")
+
+        times = [i for i in range(len(history))]
+
+        fig = make_subplots(
+            rows=3,
+            cols=1,
+            subplot_titles=(
+                "SYSTEM CALLS",
+                "NETWORK TRAFFIC (Bytes)",
+                "FILE I/O (Bytes)",
+            ),
+            vertical_spacing=0.1,
+            specs=[
+                [{"secondary_y": False}],
+                [{"secondary_y": True}],
+                [{"secondary_y": True}],
+            ],
+        )
+
+        # Syscalls
+        fig.add_trace(
+            go.Scatter(
+                x=times,
+                y=[s.syscall_count for s in history],
+                mode="lines",
+                name="Syscalls",
+                line=dict(color="#00ff88", width=3, shape="spline"),
+            ),
+            row=1,
+            col=1,
+        )
+
+        # Network
+        fig.add_trace(
+            go.Scatter(
+                x=times,
+                y=[s.rx_bytes for s in history],
+                mode="lines",
+                name="RX",
+                line=dict(color="#00d4ff", width=2, shape="spline"),
+            ),
+            row=2,
+            col=1,
+            secondary_y=False,
+        )
+
+        fig.add_trace(
+            go.Scatter(
+                x=times,
+                y=[s.tx_bytes for s in history],
+                mode="lines",
+                name="TX",
+                line=dict(color="#00ff88", width=2, shape="spline", dash="dot"),
+            ),
+            row=2,
+            col=1,
+            secondary_y=True,
+        )
+
+        # File I/O
+        fig.add_trace(
+            go.Scatter(
+                x=times,
+                y=[s.read_bytes for s in history],
+                mode="lines",
+                name="Read",
+                line=dict(color="#ff0088", width=2, shape="spline"),
+            ),
+            row=3,
+            col=1,
+            secondary_y=False,
+        )
+
+        fig.add_trace(
+            go.Scatter(
+                x=times,
+                y=[s.write_bytes for s in history],
+                mode="lines",
+                name="Write",
+                line=dict(color="#8844ff", width=2, shape="spline", dash="dot"),
+            ),
+            row=3,
+            col=1,
+            secondary_y=True,
+        )
+
+        fig.update_xaxes(title_text="Time (samples)", row=3, col=1, color="#8899ff")
+        fig.update_yaxes(title_text="Count", row=1, col=1, color="#8899ff")
+        fig.update_yaxes(
+            title_text="RX Bytes", row=2, col=1, secondary_y=False, color="#00d4ff"
+        )
+        fig.update_yaxes(
+            title_text="TX Bytes", row=2, col=1, secondary_y=True, color="#00ff88"
+        )
+        fig.update_yaxes(
+            title_text="Read Bytes", row=3, col=1, secondary_y=False, color="#ff0088"
+        )
+        fig.update_yaxes(
+            title_text="Write Bytes", row=3, col=1, secondary_y=True, color="#8844ff"
+        )
+
+        fig.update_layout(
+            height=500,
+            template="plotly_dark",
+            paper_bgcolor="rgba(0,0,0,0)",
+            plot_bgcolor="#0a0e27",
+            hovermode="x unified",
+            showlegend=True,
+            legend=dict(
+                orientation="h",
+                yanchor="bottom",
+                y=1.02,
+                xanchor="right",
+                x=1,
+                font=dict(color="#8899ff"),
+            ),
+            font=dict(family="Courier New, monospace", color="#8899ff"),
+        )
+
+        return fig
+
+    def _calculate_rates(self, history):
+        """Calculate rates from history."""
+        if len(history) < 2:
+            return {
+                "syscalls_per_sec": 0.0,
+                "rx_bytes_per_sec": 0.0,
+                "tx_bytes_per_sec": 0.0,
+                "read_bytes_per_sec": 0.0,
+                "write_bytes_per_sec": 0.0,
+            }
+
+        recent = history[-1]
+        previous = history[-2]
+        time_delta = recent.timestamp - previous.timestamp
+
+        if time_delta <= 0:
+            time_delta = 1.0
+
+        return {
+            "syscalls_per_sec": max(
+                0, (recent.syscall_count - previous.syscall_count) / time_delta
+            ),
+            "rx_bytes_per_sec": max(
+                0, (recent.rx_bytes - previous.rx_bytes) / time_delta
+            ),
+            "tx_bytes_per_sec": max(
+                0, (recent.tx_bytes - previous.tx_bytes) / time_delta
+            ),
+            "read_bytes_per_sec": max(
+                0, (recent.read_bytes - previous.read_bytes) / time_delta
+            ),
+            "write_bytes_per_sec": max(
+                0, (recent.write_bytes - previous.write_bytes) / time_delta
+            ),
+        }
+
+    def _format_bytes(self, bytes_val: float) -> str:
+        """Format bytes into human-readable string."""
+        if bytes_val < 0:
+            bytes_val = 0
+        for unit in ["B", "KB", "MB", "GB", "TB"]:
+            if bytes_val < 1024.0:
+                return f"{bytes_val:.2f} {unit}"
+            bytes_val /= 1024.0
+        return f"{bytes_val:.2f} PB"
+
+    def run(self):
+        """Run the web dashboard."""
+        self._running = True
+        # Suppress Werkzeug logging
+        import logging
+
+        log = logging.getLogger("werkzeug")
+        log.setLevel(logging.ERROR)
+
+        self.app.run(debug=False, host=self.host, port=self.port, use_reloader=False)
+
+    def stop(self):
+        """Stop the web dashboard."""
+        self._running = False

examples/hello_world.py

@@ -1,4 +1,4 @@
-from pythonbpf import bpf, section, bpfglobal, BPF
+from pythonbpf import bpf, section, bpfglobal, BPF, trace_pipe
 from ctypes import c_void_p, c_int64
 
 # Instructions to how to run this program
@@ -21,10 +21,6 @@ def LICENSE() -> str:
 
 
 b = BPF()
-b.load_and_attach()
-if b.is_loaded() and b.is_attached():
-    print("Successfully loaded and attached")
-else:
-    print("Could not load successfully")
-
-# Now cat /sys/kernel/debug/tracing/trace_pipe to see results of the execve syscall.
+b.load()
+b.attach_all()
+trace_pipe()

examples/kprobes.py

@@ -1,4 +1,4 @@
-from pythonbpf import bpf, section, bpfglobal, BPF
+from pythonbpf import bpf, section, bpfglobal, BPF, trace_pipe
 from ctypes import c_void_p, c_int64
 
 
@@ -23,7 +23,7 @@ def LICENSE() -> str:
 
 
 b = BPF()
-b.load_and_attach()
-while True:
-    print("running")
-# Now cat /sys/kernel/debug/tracing/trace_pipe to see results of unlink kprobe.
+b.load()
+b.attach_all()
+print("running")
+trace_pipe()

examples/xdp_pass.py

@@ -23,14 +23,14 @@ def count() -> HashMap:
 def hello_world(ctx: c_void_p) -> c_int64:
     key = 0
     one = 1
-    prev = count().lookup(key)
+    prev = count.lookup(key)
     if prev:
         prevval = prev + 1
         print(f"count: {prevval}")
-        count().update(key, prevval)
+        count.update(key, prevval)
         return XDP_PASS
     else:
-        count().update(key, one)
+        count.update(key, one)
 
     return XDP_PASS
 

pyproject.toml

@@ -4,22 +4,44 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "pythonbpf"
-version = "0.1.4"
+version = "0.1.8"
 description = "Reduced Python frontend for eBPF"
 authors = [
   { name = "r41k0u", email="pragyanshchaturvedi18@gmail.com" },
   { name = "varun-r-mallya", email="varunrmallya@gmail.com" }
 ]
+classifiers = [
+    "Development Status :: 3 - Alpha",
+    "Intended Audience :: Developers",
+    "Operating System :: POSIX :: Linux",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.8",
+    "Programming Language :: Python :: 3.9",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python",
+    "Topic :: Software Development :: Libraries :: Python Modules",
+    "Topic :: System :: Operating System Kernels :: Linux",
+]
 readme = "README.md"
 license = {text = "Apache-2.0"}
-requires-python = ">=3.8"
+requires-python = ">=3.10"
 
 dependencies = [
-  "llvmlite",
+  "llvmlite>=0.45",
   "astpretty",
   "pylibbpf"
 ]
 
+[project.optional-dependencies]
+docs = [
+    "sphinx>=7.0",
+    "myst-parser>=2.0",
+    "sphinx-rtd-theme>=2.0",
+    "sphinx-copybutton",
+]
+
 [tool.setuptools.packages.find]
 where = ["."]
 include = ["pythonbpf*"]

pythonbpf/allocation_pass.py

@@ -1,42 +1,34 @@
 import ast
 import logging
-
+import ctypes
 from llvmlite import ir
-from dataclasses import dataclass
-from typing import Any
+from .local_symbol import LocalSymbol
 from pythonbpf.helper import HelperHandlerRegistry
+from pythonbpf.vmlinux_parser.dependency_node import Field
+from .expr import VmlinuxHandlerRegistry
 from pythonbpf.type_deducer import ctypes_to_ir
+from pythonbpf.maps import BPFMapType
 
 logger = logging.getLogger(__name__)
 
 
-@dataclass
-class LocalSymbol:
-    var: ir.AllocaInstr
-    ir_type: ir.Type
-    metadata: Any = None
-
-    def __iter__(self):
-        yield self.var
-        yield self.ir_type
-        yield self.metadata
-
-
 def create_targets_and_rvals(stmt):
     """Create lists of targets and right-hand values from an assignment statement."""
     if isinstance(stmt.targets[0], ast.Tuple):
         if not isinstance(stmt.value, ast.Tuple):
             logger.warning("Mismatched multi-target assignment, skipping allocation")
-            return
+            return [], []
         targets, rvals = stmt.targets[0].elts, stmt.value.elts
         if len(targets) != len(rvals):
             logger.warning("length of LHS != length of RHS, skipping allocation")
-            return
+            return [], []
         return targets, rvals
     return stmt.targets, [stmt.value]
 
 
-def handle_assign_allocation(builder, stmt, local_sym_tab, structs_sym_tab):
+def handle_assign_allocation(
+    builder, stmt, local_sym_tab, map_sym_tab, structs_sym_tab
+):
     """Handle memory allocation for assignment statements."""
 
     logger.info(f"Handling assignment for allocation: {ast.dump(stmt)}")
@@ -59,7 +51,6 @@ def handle_assign_allocation(builder, stmt, local_sym_tab, structs_sym_tab):
             continue
 
         var_name = target.id
-
         # Skip if already allocated
         if var_name in local_sym_tab:
             logger.debug(f"Variable {var_name} already allocated, skipping")
@@ -67,7 +58,9 @@ def handle_assign_allocation(builder, stmt, local_sym_tab, structs_sym_tab):
 
         # Determine type and allocate based on rval
         if isinstance(rval, ast.Call):
-            _allocate_for_call(builder, var_name, rval, local_sym_tab, structs_sym_tab)
+            _allocate_for_call(
+                builder, var_name, rval, local_sym_tab, map_sym_tab, structs_sym_tab
+            )
         elif isinstance(rval, ast.Constant):
             _allocate_for_constant(builder, var_name, rval, local_sym_tab)
         elif isinstance(rval, ast.BinOp):
@@ -86,14 +79,16 @@ def handle_assign_allocation(builder, stmt, local_sym_tab, structs_sym_tab):
             )
 
 
-def _allocate_for_call(builder, var_name, rval, local_sym_tab, structs_sym_tab):
+def _allocate_for_call(
+    builder, var_name, rval, local_sym_tab, map_sym_tab, structs_sym_tab
+):
     """Allocate memory for variable assigned from a call."""
 
     if isinstance(rval.func, ast.Name):
         call_type = rval.func.id
 
         # C type constructors
-        if call_type in ("c_int32", "c_int64", "c_uint32", "c_uint64"):
+        if call_type in ("c_int32", "c_int64", "c_uint32", "c_uint64", "c_void_p"):
             ir_type = ctypes_to_ir(call_type)
             var = builder.alloca(ir_type, name=var_name)
             var.align = ir_type.width // 8
@@ -119,24 +114,108 @@ def _allocate_for_call(builder, var_name, rval, local_sym_tab, structs_sym_tab):
         # Struct constructors
         elif call_type in structs_sym_tab:
             struct_info = structs_sym_tab[call_type]
-            var = builder.alloca(struct_info.ir_type, name=var_name)
-            local_sym_tab[var_name] = LocalSymbol(var, struct_info.ir_type, call_type)
-            logger.info(f"Pre-allocated {var_name} for struct {call_type}")
+            if len(rval.args) == 0:
+                # Zero-arg constructor: allocate the struct itself
+                var = builder.alloca(struct_info.ir_type, name=var_name)
+                local_sym_tab[var_name] = LocalSymbol(
+                    var, struct_info.ir_type, call_type
+                )
+                logger.info(f"Pre-allocated {var_name} for struct {call_type}")
+            else:
+                # Pointer cast: allocate as pointer to struct
+                ptr_type = ir.PointerType(struct_info.ir_type)
+                var = builder.alloca(ptr_type, name=var_name)
+                var.align = 8
+                local_sym_tab[var_name] = LocalSymbol(var, ptr_type, call_type)
+                logger.info(
+                    f"Pre-allocated {var_name} for struct pointer cast to {call_type}"
+                )
+
+        elif VmlinuxHandlerRegistry.is_vmlinux_struct(call_type):
+            # When calling struct_name(pointer), we're doing a cast, not construction
+            # So we allocate as a pointer (i64) not as the actual struct
+            var = builder.alloca(ir.IntType(64), name=var_name)
+            var.align = 8
+            local_sym_tab[var_name] = LocalSymbol(
+                var, ir.IntType(64), VmlinuxHandlerRegistry.get_struct_type(call_type)
+            )
+            logger.info(
+                f"Pre-allocated {var_name} for vmlinux struct pointer cast to {call_type}"
+            )
 
         else:
             logger.warning(f"Unknown call type for allocation: {call_type}")
 
     elif isinstance(rval.func, ast.Attribute):
         # Map method calls - need double allocation for ptr handling
-        _allocate_for_map_method(builder, var_name, local_sym_tab)
+        _allocate_for_map_method(
+            builder, var_name, rval, local_sym_tab, map_sym_tab, structs_sym_tab
+        )
 
     else:
         logger.warning(f"Unsupported call function type for {var_name}")
 
 
-def _allocate_for_map_method(builder, var_name, local_sym_tab):
+def _allocate_for_map_method(
+    builder, var_name, rval, local_sym_tab, map_sym_tab, structs_sym_tab
+):
     """Allocate memory for variable assigned from map method (double alloc)."""
 
+    map_name = rval.func.value.id
+    method_name = rval.func.attr
+
+    # NOTE: We will have to special case HashMap.lookup which returns a pointer to value type
+    # The value type can be a struct as well, so we need to handle that properly
+    # This special casing is not ideal, as over time other map methods may need similar handling
+    # But for now, we will just handle lookup specifically
+    if map_name not in map_sym_tab:
+        logger.error(f"Map '{map_name}' not found for allocation")
+        return
+
+    if method_name != "lookup":
+        # Fallback allocation for other map methods
+        _allocate_for_map_method_fallback(builder, var_name, local_sym_tab)
+        return
+
+    map_params = map_sym_tab[map_name].params
+    if map_params["type"] != BPFMapType.HASH:
+        logger.warning(
+            "Map method lookup used on non-hash map, using fallback allocation"
+        )
+        _allocate_for_map_method_fallback(builder, var_name, local_sym_tab)
+        return
+
+    value_type = map_params["value"]
+    # Determine IR type for value
+    if isinstance(value_type, str) and value_type in structs_sym_tab:
+        struct_info = structs_sym_tab[value_type]
+        value_ir_type = struct_info.ir_type
+    else:
+        value_ir_type = ctypes_to_ir(value_type)
+
+    if value_ir_type is None:
+        logger.warning(
+            f"Could not determine IR type for map value '{value_type}', using fallback allocation"
+        )
+        _allocate_for_map_method_fallback(builder, var_name, local_sym_tab)
+        return
+
+    # Main variable (pointer to pointer)
+    ir_type = ir.PointerType(ir.IntType(64))
+    var = builder.alloca(ir_type, name=var_name)
+    local_sym_tab[var_name] = LocalSymbol(var, ir_type, value_type)
+    # Temporary variable for computed values
+    tmp_ir_type = value_ir_type
+    var_tmp = builder.alloca(tmp_ir_type, name=f"{var_name}_tmp")
+    local_sym_tab[f"{var_name}_tmp"] = LocalSymbol(var_tmp, tmp_ir_type)
+    logger.info(
+        f"Pre-allocated {var_name} and {var_name}_tmp for map method lookup of type {value_ir_type}"
+    )
+
+
+def _allocate_for_map_method_fallback(builder, var_name, local_sym_tab):
+    """Fallback allocation for map method variable (i64* and i64**)."""
+
     # Main variable (pointer to pointer)
     ir_type = ir.PointerType(ir.IntType(64))
     var = builder.alloca(ir_type, name=var_name)
@@ -147,7 +226,9 @@ def _allocate_for_map_method(builder, var_name, local_sym_tab):
     var_tmp = builder.alloca(tmp_ir_type, name=f"{var_name}_tmp")
     local_sym_tab[f"{var_name}_tmp"] = LocalSymbol(var_tmp, tmp_ir_type)
 
-    logger.info(f"Pre-allocated {var_name} and {var_name}_tmp for map method")
+    logger.info(
+        f"Pre-allocated {var_name} and {var_name}_tmp for map method (fallback)"
+    )
 
 
 def _allocate_for_constant(builder, var_name, rval, local_sym_tab):
@@ -189,17 +270,33 @@ def _allocate_for_binop(builder, var_name, local_sym_tab):
     logger.info(f"Pre-allocated {var_name} for binop result")
 
 
+def _get_type_name(ir_type):
+    """Get a string representation of an IR type."""
+    if isinstance(ir_type, ir.IntType):
+        return f"i{ir_type.width}"
+    elif isinstance(ir_type, ir.PointerType):
+        return "ptr"
+    elif isinstance(ir_type, ir.ArrayType):
+        return f"[{ir_type.count}x{_get_type_name(ir_type.element)}]"
+    else:
+        return str(ir_type).replace(" ", "")
+
+
 def allocate_temp_pool(builder, max_temps, local_sym_tab):
     """Allocate the temporary scratch space pool for helper arguments."""
-    if max_temps == 0:
+    if not max_temps:
+        logger.info("No temp pool allocation needed")
         return
 
-    logger.info(f"Allocating temp pool of {max_temps} variables")
-    for i in range(max_temps):
-        temp_name = f"__helper_temp_{i}"
-        temp_var = builder.alloca(ir.IntType(64), name=temp_name)
-        temp_var.align = 8
-        local_sym_tab[temp_name] = LocalSymbol(temp_var, ir.IntType(64))
+    for tmp_type, cnt in max_temps.items():
+        type_name = _get_type_name(tmp_type)
+        logger.info(f"Allocating temp pool of {cnt} variables of type {type_name}")
+        for i in range(cnt):
+            temp_name = f"__helper_temp_{type_name}_{i}"
+            temp_var = builder.alloca(tmp_type, name=temp_name)
+            temp_var.align = _get_alignment(tmp_type)
+            local_sym_tab[temp_name] = LocalSymbol(temp_var, tmp_type)
+            logger.debug(f"Allocated temp variable: {temp_name}")
 
 
 def _allocate_for_name(builder, var_name, rval, local_sym_tab):
@@ -238,9 +335,99 @@ def _allocate_for_attribute(builder, var_name, rval, local_sym_tab, structs_sym_
         logger.error(f"Struct variable '{struct_var}' not found")
         return
 
-    struct_type = local_sym_tab[struct_var].metadata
+    struct_type: type = local_sym_tab[struct_var].metadata
     if not struct_type or struct_type not in structs_sym_tab:
-        logger.error(f"Struct type '{struct_type}' not found")
+        if VmlinuxHandlerRegistry.is_vmlinux_struct(struct_type.__name__):
+            # Handle vmlinux struct field access
+            vmlinux_struct_name = struct_type.__name__
+            if not VmlinuxHandlerRegistry.has_field(vmlinux_struct_name, field_name):
+                logger.error(
+                    f"Field '{field_name}' not found in vmlinux struct '{vmlinux_struct_name}'"
+                )
+                return
+
+            field_type: tuple[ir.GlobalVariable, Field] = (
+                VmlinuxHandlerRegistry.get_field_type(vmlinux_struct_name, field_name)
+            )
+            field_ir, field = field_type
+
+            # Determine the actual IR type based on the field's type
+            actual_ir_type = None
+
+            # Check if it's a ctypes primitive
+            if field.type.__module__ == ctypes.__name__:
+                try:
+                    field_size_bytes = ctypes.sizeof(field.type)
+                    field_size_bits = field_size_bytes * 8
+
+                    if field_size_bits in [8, 16, 32, 64]:
+                        # Special case: struct_xdp_md i32 fields should allocate as i64
+                        # because load_ctx_field will zero-extend them to i64
+                        if (
+                            vmlinux_struct_name == "struct_xdp_md"
+                            and field_size_bits == 32
+                        ):
+                            actual_ir_type = ir.IntType(64)
+                            logger.info(
+                                f"Allocating {var_name} as i64 for i32 field from struct_xdp_md.{field_name} "
+                                "(will be zero-extended during load)"
+                            )
+                        else:
+                            actual_ir_type = ir.IntType(field_size_bits)
+                    else:
+                        logger.warning(
+                            f"Unusual field size {field_size_bits} bits for {field_name}"
+                        )
+                        actual_ir_type = ir.IntType(64)
+                except Exception as e:
+                    logger.warning(
+                        f"Could not determine size for ctypes field {field_name}: {e}"
+                    )
+                    actual_ir_type = ir.IntType(64)
+                    field_size_bits = 64
+
+            # Check if it's a nested vmlinux struct or complex type
+            elif field.type.__module__ == "vmlinux":
+                # For pointers to structs, use pointer type (64-bit)
+                if field.ctype_complex_type is not None and issubclass(
+                    field.ctype_complex_type, ctypes._Pointer
+                ):
+                    actual_ir_type = ir.IntType(64)  # Pointer is always 64-bit
+                    field_size_bits = 64
+                # For embedded structs, this is more complex - might need different handling
+                else:
+                    logger.warning(
+                        f"Field {field_name} is a nested vmlinux struct, using i64 for now"
+                    )
+                    actual_ir_type = ir.IntType(64)
+                    field_size_bits = 64
+            else:
+                logger.warning(
+                    f"Unknown field type module {field.type.__module__} for {field_name}"
+                )
+                actual_ir_type = ir.IntType(64)
+                field_size_bits = 64
+
+            # Pre-allocate the tmp storage used by load_struct_field (so we don't alloca inside handler)
+            tmp_name = f"{struct_var}_{field_name}_tmp"
+            tmp_ir_type = ir.IntType(field_size_bits)
+            tmp_var = builder.alloca(tmp_ir_type, name=tmp_name)
+            tmp_var.align = tmp_ir_type.width // 8
+            local_sym_tab[tmp_name] = LocalSymbol(tmp_var, tmp_ir_type)
+            logger.info(
+                f"Pre-allocated temp {tmp_name} (i{field_size_bits}) for vmlinux field read {vmlinux_struct_name}.{field_name}"
+            )
+
+            # Allocate with the actual IR type for the destination var
+            var = _allocate_with_type(builder, var_name, actual_ir_type)
+            local_sym_tab[var_name] = LocalSymbol(var, actual_ir_type, field)
+
+            logger.info(
+                f"Pre-allocated {var_name} as {actual_ir_type} from vmlinux struct {vmlinux_struct_name}.{field_name}"
+            )
+            return
+        else:
+            logger.error(f"Struct type '{struct_type}' not found")
         return
 
     struct_info = structs_sym_tab[struct_type]

pythonbpf/assign_pass.py

@@ -1,8 +1,12 @@
 import ast
 import logging
+from inspect import isclass
+
 from llvmlite import ir
 from pythonbpf.expr import eval_expr
 from pythonbpf.helper import emit_probe_read_kernel_str_call
+from pythonbpf.type_deducer import ctypes_to_ir
+from pythonbpf.vmlinux_parser.dependency_node import Field
 
 logger = logging.getLogger(__name__)
 
@@ -146,9 +150,74 @@ def handle_variable_assignment(
         return False
 
     val, val_type = val_result
-    logger.info(f"Evaluated value for {var_name}: {val} of type {val_type}, {var_type}")
+    logger.info(
+        f"Evaluated value for {var_name}: {val} of type {val_type}, expected {var_type}"
+    )
+
     if val_type != var_type:
-        if isinstance(val_type, ir.IntType) and isinstance(var_type, ir.IntType):
+        # Handle vmlinux struct pointers - they're represented as Python classes but are i64 pointers
+        if isclass(val_type) and (val_type.__module__ == "vmlinux"):
+            logger.info("Handling vmlinux struct pointer assignment")
+            # vmlinux struct pointers: val is a pointer, need to convert to i64
+            if isinstance(var_type, ir.IntType) and var_type.width == 64:
+                # Convert pointer to i64 using ptrtoint
+                if isinstance(val.type, ir.PointerType):
+                    val = builder.ptrtoint(val, ir.IntType(64))
+                    logger.info(
+                        "Converted vmlinux struct pointer to i64 using ptrtoint"
+                    )
+                builder.store(val, var_ptr)
+                logger.info(f"Assigned vmlinux struct pointer to {var_name} (i64)")
+                return True
+            else:
+                logger.error(
+                    f"Type mismatch: vmlinux struct pointer requires i64, got {var_type}"
+                )
+                return False
+        # Handle user-defined struct pointer casts
+        # val_type is a string (struct name), var_type is a pointer to the struct
+        if isinstance(val_type, str) and val_type in structs_sym_tab:
+            struct_info = structs_sym_tab[val_type]
+            expected_ptr_type = ir.PointerType(struct_info.ir_type)
+
+            # Check if var_type matches the expected pointer type
+            if isinstance(var_type, ir.PointerType) and var_type == expected_ptr_type:
+                # val is already the correct pointer type from inttoptr/bitcast
+                builder.store(val, var_ptr)
+                logger.info(f"Assigned user-defined struct pointer cast to {var_name}")
+                return True
+            else:
+                logger.error(
+                    f"Type mismatch: user-defined struct pointer cast requires pointer type, got {var_type}"
+                )
+                return False
+        if isinstance(val_type, Field):
+            logger.info("Handling assignment to struct field")
+            # Special handling for struct_xdp_md i32 fields that are zero-extended to i64
+            # The load_ctx_field already extended them, so val is i64 but val_type.type shows c_uint
+            if (
+                hasattr(val_type, "type")
+                and val_type.type.__name__ == "c_uint"
+                and isinstance(var_type, ir.IntType)
+                and var_type.width == 64
+            ):
+                # This is the struct_xdp_md case - value is already i64
+                builder.store(val, var_ptr)
+                logger.info(
+                    f"Assigned zero-extended struct_xdp_md i32 field to {var_name} (i64)"
+                )
+                return True
+            # TODO: handling only ctype struct fields for now. Handle other stuff too later.
+            elif var_type == ctypes_to_ir(val_type.type.__name__):
+                builder.store(val, var_ptr)
+                logger.info(f"Assigned ctype struct field to {var_name}")
+                return True
+            else:
+                logger.error(
+                    f"Failed to assign ctype struct field to {var_name}: {val_type} != {var_type}"
+                )
+                return False
+        elif isinstance(val_type, ir.IntType) and isinstance(var_type, ir.IntType):
             # Allow implicit int widening
             if val_type.width < var_type.width:
                 val = builder.sext(val, var_type)

pythonbpf/codegen.py

@@ -5,6 +5,8 @@ from .functions import func_proc
 from .maps import maps_proc
 from .structs import structs_proc
 from .vmlinux_parser import vmlinux_proc
+from pythonbpf.vmlinux_parser.vmlinux_exports_handler import VmlinuxHandler
+from .expr import VmlinuxHandlerRegistry
 from .globals_pass import (
     globals_list_creation,
     globals_processing,
@@ -19,10 +21,38 @@ from pylibbpf import BpfObject
 import tempfile
 from logging import Logger
 import logging
+import re
 
 logger: Logger = logging.getLogger(__name__)
 
-VERSION = "v0.1.4"
+VERSION = "v0.1.8"
+
+
+def finalize_module(original_str):
+    """After all IR generation is complete, we monkey patch btf_ama attribute"""
+
+    # Create a string with applied transformation of btf_ama attribute addition to BTF struct field accesses.
+    pattern = r'(@"llvm\.[^"]+:[^"]*" = external global i64, !llvm\.preserve\.access\.index ![0-9]+)'
+    replacement = r'\1 "btf_ama"'
+    return re.sub(pattern, replacement, original_str)
+
+
+def bpf_passthrough_gen(module):
+    i32_ty = ir.IntType(32)
+    ptr_ty = ir.PointerType(ir.IntType(8))
+    fnty = ir.FunctionType(ptr_ty, [i32_ty, ptr_ty])
+
+    # Declare the intrinsic
+    passthrough = ir.Function(module, fnty, "llvm.bpf.passthrough.p0.p0")
+
+    # Set function attributes
+    # TODO: the ones commented are supposed to be there but cannot be added due to llvmlite limitations at the moment
+    # passthrough.attributes.add("nofree")
+    # passthrough.attributes.add("nosync")
+    passthrough.attributes.add("nounwind")
+    # passthrough.attributes.add("memory(none)")
+
+    return passthrough
 
 
 def find_bpf_chunks(tree):
@@ -45,13 +75,18 @@ def processor(source_code, filename, module):
     for func_node in bpf_chunks:
         logger.info(f"Found BPF function/struct: {func_node.name}")
 
-    vmlinux_proc(tree, module)
+    bpf_passthrough_gen(module)
+
+    vmlinux_symtab = vmlinux_proc(tree, module)
+    if vmlinux_symtab:
+        handler = VmlinuxHandler.initialize(vmlinux_symtab)
+        VmlinuxHandlerRegistry.set_handler(handler)
+
     populate_global_symbol_table(tree, module)
     license_processing(tree, module)
     globals_processing(tree, module)
-
     structs_sym_tab = structs_proc(tree, module, bpf_chunks)
-    map_sym_tab = maps_proc(tree, module, bpf_chunks)
+    map_sym_tab = maps_proc(tree, module, bpf_chunks, structs_sym_tab)
     func_proc(tree, module, bpf_chunks, map_sym_tab, structs_sym_tab)
 
     globals_list_creation(tree, module)
@@ -122,10 +157,12 @@ def compile_to_ir(filename: str, output: str, loglevel=logging.INFO):
 
     module.add_named_metadata("llvm.ident", [f"PythonBPF {VERSION}"])
 
+    module_string: str = finalize_module(str(module))
+
     logger.info(f"IR written to {output}")
     with open(output, "w") as f:
         f.write(f'source_filename = "{filename}"\n')
-        f.write(str(module))
+        f.write(module_string)
         f.write("\n")
 
     return output, structs_sym_tab, maps_sym_tab
@@ -181,13 +218,11 @@ def compile(loglevel=logging.WARNING) -> bool:
 def BPF(loglevel=logging.WARNING) -> BpfObject:
     caller_frame = inspect.stack()[1]
     src = inspect.getsource(caller_frame.frame)
-    with tempfile.NamedTemporaryFile(
-        mode="w+", delete=True, suffix=".py"
-    ) as f, tempfile.NamedTemporaryFile(
-        mode="w+", delete=True, suffix=".ll"
-    ) as inter, tempfile.NamedTemporaryFile(
-        mode="w+", delete=False, suffix=".o"
-    ) as obj_file:
+    with (
+        tempfile.NamedTemporaryFile(mode="w+", delete=True, suffix=".py") as f,
+        tempfile.NamedTemporaryFile(mode="w+", delete=True, suffix=".ll") as inter,
+        tempfile.NamedTemporaryFile(mode="w+", delete=False, suffix=".o") as obj_file,
+    ):
         f.write(src)
         f.flush()
         source = f.name

pythonbpf/debuginfo/debug_info_generator.py

@@ -49,6 +49,10 @@ class DebugInfoGenerator:
             )
         return self._type_cache[key]
 
+    def get_uint8_type(self) -> Any:
+        """Get debug info for signed 8-bit integer"""
+        return self.get_basic_type("char", 8, dc.DW_ATE_unsigned)
+
     def get_int32_type(self) -> Any:
         """Get debug info for signed 32-bit integer"""
         return self.get_basic_type("int", 32, dc.DW_ATE_signed)
@@ -81,6 +85,20 @@ class DebugInfoGenerator:
             },
         )
 
+    def create_array_type_vmlinux(self, type_info: Any, count: int) -> Any:
+        """Create an array type of the given base type with specified count"""
+        base_type, type_sizing = type_info
+        subrange = self.module.add_debug_info("DISubrange", {"count": count})
+        return self.module.add_debug_info(
+            "DICompositeType",
+            {
+                "tag": dc.DW_TAG_array_type,
+                "baseType": base_type,
+                "size": type_sizing,
+                "elements": [subrange],
+            },
+        )
+
     @staticmethod
     def _compute_array_size(base_type: Any, count: int) -> int:
         # Extract size from base_type if possible
@@ -101,6 +119,23 @@ class DebugInfoGenerator:
             },
         )
 
+    def create_struct_member_vmlinux(
+        self, name: str, base_type_with_size: Any, offset: int
+    ) -> Any:
+        """Create a struct member with the given name, type, and offset"""
+        base_type, type_size = base_type_with_size
+        return self.module.add_debug_info(
+            "DIDerivedType",
+            {
+                "tag": dc.DW_TAG_member,
+                "name": name,
+                "file": self.module._file_metadata,
+                "baseType": base_type,
+                "size": type_size,
+                "offset": offset,
+            },
+        )
+
     def create_struct_type(
         self, members: List[Any], size: int, is_distinct: bool
     ) -> Any:
@@ -116,6 +151,22 @@ class DebugInfoGenerator:
             is_distinct=is_distinct,
         )
 
+    def create_struct_type_with_name(
+        self, name: str, members: List[Any], size: int, is_distinct: bool
+    ) -> Any:
+        """Create a struct type with the given members and size"""
+        return self.module.add_debug_info(
+            "DICompositeType",
+            {
+                "name": name,
+                "tag": dc.DW_TAG_structure_type,
+                "file": self.module._file_metadata,
+                "size": size,
+                "elements": members,
+            },
+            is_distinct=is_distinct,
+        )
+
     def create_global_var_debug_info(
         self, name: str, var_type: Any, is_local: bool = False
     ) -> Any:
@@ -137,3 +188,83 @@ class DebugInfoGenerator:
             "DIGlobalVariableExpression",
             {"var": global_var, "expr": self.module.add_debug_info("DIExpression", {})},
         )
+
+    def get_int64_type(self):
+        return self.get_basic_type("long", 64, dc.DW_ATE_signed)
+
+    def create_subroutine_type(self, return_type, param_types):
+        """
+        Create a DISubroutineType given return type and list of parameter types.
+        Equivalent to: !DISubroutineType(types: !{ret, args...})
+        """
+        type_array = [return_type]
+        if isinstance(param_types, (list, tuple)):
+            type_array.extend(param_types)
+        else:
+            type_array.append(param_types)
+        return self.module.add_debug_info("DISubroutineType", {"types": type_array})
+
+    def create_local_variable_debug_info(
+        self, name: str, arg: int, var_type: Any
+    ) -> Any:
+        """
+        Create debug info for a local variable (DILocalVariable) without scope.
+        Example:
+        !DILocalVariable(name: "ctx", arg: 1, file: !3, line: 20, type: !7)
+        """
+        return self.module.add_debug_info(
+            "DILocalVariable",
+            {
+                "name": name,
+                "arg": arg,
+                "file": self.module._file_metadata,
+                "type": var_type,
+            },
+        )
+
+    def add_scope_to_local_variable(self, local_variable_debug_info, scope_value):
+        """
+        Add scope information to an existing local variable debug info object.
+        """
+        # TODO: this is a workaround a flaw in the debug info generation. Fix this if possible in the future.
+        # We should not be touching llvmlite's internals like this.
+        if hasattr(local_variable_debug_info, "operands"):
+            # LLVM metadata operands is a tuple, so we need to rebuild it
+            existing_operands = local_variable_debug_info.operands
+
+            # Convert tuple to list, add scope, convert back to tuple
+            operands_list = list(existing_operands)
+            operands_list.append(("scope", scope_value))
+
+            # Reassign the new tuple
+            local_variable_debug_info.operands = tuple(operands_list)
+
+    def create_subprogram(
+        self, name: str, subroutine_type: Any, retained_nodes: List[Any]
+    ) -> Any:
+        """
+        Create a DISubprogram for a function.
+
+        Args:
+            name: Function name
+            subroutine_type: DISubroutineType for the function signature
+            retained_nodes: List of DILocalVariable nodes for function parameters/variables
+
+        Returns:
+            DISubprogram metadata
+        """
+        return self.module.add_debug_info(
+            "DISubprogram",
+            {
+                "name": name,
+                "scope": self.module._file_metadata,
+                "file": self.module._file_metadata,
+                "type": subroutine_type,
+                # TODO: the following flags do not exist at the moment in our dwarf constants file. We need to add them.
+                # "flags": dc.DW_FLAG_Prototyped | dc.DW_FLAG_AllCallsDescribed,
+                # "spFlags": dc.DW_SPFLAG_Definition | dc.DW_SPFLAG_Optimized,
+                "unit": self.module._debug_compile_unit,
+                "retainedNodes": retained_nodes,
+            },
+            is_distinct=True,
+        )

pythonbpf/expr/__init__.py

@@ -1,7 +1,8 @@
 from .expr_pass import eval_expr, handle_expr, get_operand_value
 from .type_normalization import convert_to_bool, get_base_type_and_depth
-from .ir_ops import deref_to_depth
+from .ir_ops import deref_to_depth, access_struct_field
 from .call_registry import CallHandlerRegistry
+from .vmlinux_registry import VmlinuxHandlerRegistry
 
 __all__ = [
     "eval_expr",
@@ -9,6 +10,8 @@ __all__ = [
     "convert_to_bool",
     "get_base_type_and_depth",
     "deref_to_depth",
+    "access_struct_field",
     "get_operand_value",
     "CallHandlerRegistry",
+    "VmlinuxHandlerRegistry",
 ]

pythonbpf/expr/expr_pass.py

@@ -6,12 +6,14 @@ from typing import Dict
 
 from pythonbpf.type_deducer import ctypes_to_ir, is_ctypes
 from .call_registry import CallHandlerRegistry
+from .ir_ops import deref_to_depth, access_struct_field
 from .type_normalization import (
     convert_to_bool,
     handle_comparator,
     get_base_type_and_depth,
-    deref_to_depth,
 )
+from .vmlinux_registry import VmlinuxHandlerRegistry
+from ..vmlinux_parser.dependency_node import Field
 
 logger: Logger = logging.getLogger(__name__)
 
@@ -27,8 +29,12 @@ def _handle_name_expr(expr: ast.Name, local_sym_tab: Dict, builder: ir.IRBuilder
         val = builder.load(var)
         return val, local_sym_tab[expr.id].ir_type
     else:
-        logger.info(f"Undefined variable {expr.id}")
-        return None
+        # Check if it's a vmlinux enum/constant
+        vmlinux_result = VmlinuxHandlerRegistry.handle_name(expr.id)
+        if vmlinux_result is not None:
+            return vmlinux_result
+
+        raise SyntaxError(f"Undefined variable {expr.id}")
 
 
 def _handle_constant_expr(module, builder, expr: ast.Constant):
@@ -55,6 +61,7 @@ def _handle_constant_expr(module, builder, expr: ast.Constant):
 
 
 def _handle_attribute_expr(
+    func,
     expr: ast.Attribute,
     local_sym_tab: Dict,
     structs_sym_tab: Dict,
@@ -67,13 +74,46 @@ def _handle_attribute_expr(
         if var_name in local_sym_tab:
             var_ptr, var_type, var_metadata = local_sym_tab[var_name]
             logger.info(f"Loading attribute {attr_name} from variable {var_name}")
-            logger.info(f"Variable type: {var_type}, Variable ptr: {var_ptr}")
-            metadata = structs_sym_tab[var_metadata]
-            if attr_name in metadata.fields:
-                gep = metadata.gep(builder, var_ptr, attr_name)
-                val = builder.load(gep)
-                field_type = metadata.field_type(attr_name)
-                return val, field_type
+            logger.info(
+                f"Variable type: {var_type}, Variable ptr: {var_ptr}, Variable Metadata: {var_metadata}"
+            )
+            if (
+                hasattr(var_metadata, "__module__")
+                and var_metadata.__module__ == "vmlinux"
+            ):
+                # Try vmlinux handler when var_metadata is not a string, but has a module attribute.
+                # This has been done to keep everything separate in vmlinux struct handling.
+                vmlinux_result = VmlinuxHandlerRegistry.handle_attribute(
+                    expr, local_sym_tab, None, builder
+                )
+                if vmlinux_result is not None:
+                    return vmlinux_result
+                else:
+                    raise RuntimeError("Vmlinux struct did not process successfully")
+
+            elif isinstance(var_metadata, Field):
+                logger.error(
+                    f"Cannot access field '{attr_name}' on already-loaded field value '{var_name}'"
+                )
+                return None
+
+            if var_metadata in structs_sym_tab:
+                return access_struct_field(
+                    builder,
+                    var_ptr,
+                    var_type,
+                    var_metadata,
+                    expr.attr,
+                    structs_sym_tab,
+                    func,
+                )
+            else:
+                logger.error(f"Struct metadata for '{var_name}' not found")
+        else:
+            logger.error(f"Undefined variable '{var_name}' for attribute access")
+    else:
+        logger.error("Unsupported attribute base expression type")
+
     return None
 
 
@@ -128,9 +168,18 @@ def get_operand_value(
             var_type = var.type
             base_type, depth = get_base_type_and_depth(var_type)
             logger.info(f"var is {var}, base_type is {base_type}, depth is {depth}")
-            val = deref_to_depth(func, builder, var, depth)
+            if depth == 1:
+                val = builder.load(var)
+                return val
+            else:
+                val = deref_to_depth(func, builder, var, depth)
             return val
-        raise ValueError(f"Undefined variable: {operand.id}")
+        else:
+            # Check if it's a vmlinux enum/constant
+            vmlinux_result = VmlinuxHandlerRegistry.handle_name(operand.id)
+            if vmlinux_result is not None:
+                val, _ = vmlinux_result
+                return val
     elif isinstance(operand, ast.Constant):
         if isinstance(operand.value, int):
             cst = ir.Constant(ir.IntType(64), int(operand.value))
@@ -254,16 +303,45 @@ def _handle_ctypes_call(
     call_type = expr.func.id
     expected_type = ctypes_to_ir(call_type)
 
-    if val[1] != expected_type:
+    # Extract the actual IR value and type
+    # val could be (value, ir_type) or (value, Field)
+    value, val_type = val
+
+    # If val_type is a Field object (from vmlinux struct), get the actual IR type of the value
+    if isinstance(val_type, Field):
+        # The value is already the correct IR value (potentially zero-extended)
+        # Get the IR type from the value itself
+        actual_ir_type = value.type
+        logger.info(
+            f"Converting vmlinux field {val_type.name} (IR type: {actual_ir_type}) to {call_type}"
+        )
+    else:
+        actual_ir_type = val_type
+
+    if actual_ir_type != expected_type:
         # NOTE: We are only considering casting to and from int types for now
-        if isinstance(val[1], ir.IntType) and isinstance(expected_type, ir.IntType):
-            if val[1].width < expected_type.width:
-                val = (builder.sext(val[0], expected_type), expected_type)
+        if isinstance(actual_ir_type, ir.IntType) and isinstance(
+            expected_type, ir.IntType
+        ):
+            if actual_ir_type.width < expected_type.width:
+                value = builder.sext(value, expected_type)
+                logger.info(
+                    f"Sign-extended from i{actual_ir_type.width} to i{expected_type.width}"
+                )
+            elif actual_ir_type.width > expected_type.width:
+                value = builder.trunc(value, expected_type)
+                logger.info(
+                    f"Truncated from i{actual_ir_type.width} to i{expected_type.width}"
+                )
             else:
-                val = (builder.trunc(val[0], expected_type), expected_type)
+                # Same width, just use as-is (e.g., both i64)
+                pass
         else:
-            raise ValueError(f"Type mismatch: expected {expected_type}, got {val[1]}")
-    return val
+            raise ValueError(
+                f"Type mismatch: expected {expected_type}, got {actual_ir_type} (original type: {val_type})"
+            )
+
+    return value, expected_type
 
 
 def _handle_compare(
@@ -332,6 +410,7 @@ def _handle_unary_op(
         neg_one = ir.Constant(ir.IntType(64), -1)
         result = builder.mul(operand, neg_one)
         return result, ir.IntType(64)
+    return None
 
 
 # ============================================================================
@@ -469,6 +548,134 @@ def _handle_boolean_op(
         return None
 
 
+# ============================================================================
+# Struct casting (including vmlinux struct casting)
+# ============================================================================
+
+
+def _handle_vmlinux_cast(
+    func,
+    module,
+    builder,
+    expr,
+    local_sym_tab,
+    map_sym_tab,
+    structs_sym_tab=None,
+):
+    # handle expressions such as struct_request(ctx.di) where struct_request is a vmlinux
+    # struct and ctx.di is a pointer to a struct but is actually represented as a c_uint64
+    # which needs to be cast to a pointer. This is also a field of another vmlinux struct
+    """Handle vmlinux struct cast expressions like struct_request(ctx.di)."""
+    if len(expr.args) != 1:
+        logger.info("vmlinux struct cast takes exactly one argument")
+        return None
+
+    # Get the struct name
+    struct_name = expr.func.id
+
+    # Evaluate the argument (e.g., ctx.di which is a c_uint64)
+    arg_result = eval_expr(
+        func,
+        module,
+        builder,
+        expr.args[0],
+        local_sym_tab,
+        map_sym_tab,
+        structs_sym_tab,
+    )
+
+    if arg_result is None:
+        logger.info("Failed to evaluate argument to vmlinux struct cast")
+        return None
+
+    arg_val, arg_type = arg_result
+    # Get the vmlinux struct type
+    vmlinux_struct_type = VmlinuxHandlerRegistry.get_struct_type(struct_name)
+    if vmlinux_struct_type is None:
+        logger.error(f"Failed to get vmlinux struct type for {struct_name}")
+        return None
+    # Cast the integer/value to a pointer to the struct
+    # If arg_val is an integer type, we need to inttoptr it
+    ptr_type = ir.PointerType()
+    # TODO: add a field value type check here
+    # print(arg_type)
+    if isinstance(arg_type, Field):
+        if ctypes_to_ir(arg_type.type.__name__):
+            # Cast integer to pointer
+            casted_ptr = builder.inttoptr(arg_val, ptr_type)
+        else:
+            logger.error(f"Unsupported type for vmlinux cast: {arg_type}")
+            return None
+    else:
+        casted_ptr = builder.inttoptr(arg_val, ptr_type)
+
+    return casted_ptr, vmlinux_struct_type
+
+
+def _handle_user_defined_struct_cast(
+    func,
+    module,
+    builder,
+    expr,
+    local_sym_tab,
+    map_sym_tab,
+    structs_sym_tab,
+):
+    """Handle user-defined struct cast expressions like iphdr(nh).
+
+    This casts a pointer/integer value to a pointer to the user-defined struct,
+    similar to how vmlinux struct casts work but for user-defined @struct types.
+    """
+    if len(expr.args) != 1:
+        logger.info("User-defined struct cast takes exactly one argument")
+        return None
+
+    # Get the struct name
+    struct_name = expr.func.id
+
+    if struct_name not in structs_sym_tab:
+        logger.error(f"Struct {struct_name} not found in structs_sym_tab")
+        return None
+
+    struct_info = structs_sym_tab[struct_name]
+
+    # Evaluate the argument (e.g.,
+    # an address/pointer value)
+    arg_result = eval_expr(
+        func,
+        module,
+        builder,
+        expr.args[0],
+        local_sym_tab,
+        map_sym_tab,
+        structs_sym_tab,
+    )
+
+    if arg_result is None:
+        logger.info("Failed to evaluate argument to user-defined struct cast")
+        return None
+
+    arg_val, arg_type = arg_result
+
+    # Cast the integer/pointer value to a pointer to the struct type
+    # The struct pointer type is a pointer to the struct's IR type
+    struct_ptr_type = ir.PointerType(struct_info.ir_type)
+
+    # If arg_val is an integer type (like i64), convert to pointer using inttoptr
+    if isinstance(arg_val.type, ir.IntType):
+        casted_ptr = builder.inttoptr(arg_val, struct_ptr_type)
+        logger.info(f"Cast integer to pointer for struct {struct_name}")
+    elif isinstance(arg_val.type, ir.PointerType):
+        # If already a pointer, bitcast to the struct pointer type
+        casted_ptr = builder.bitcast(arg_val, struct_ptr_type)
+        logger.info(f"Bitcast pointer to struct pointer for {struct_name}")
+    else:
+        logger.error(f"Unsupported type for user-defined struct cast: {arg_val.type}")
+        return None
+
+    return casted_ptr, struct_name
+
+
 # ============================================================================
 # Expression Dispatcher
 # ============================================================================
@@ -489,6 +696,18 @@ def eval_expr(
     elif isinstance(expr, ast.Constant):
         return _handle_constant_expr(module, builder, expr)
     elif isinstance(expr, ast.Call):
+        if isinstance(expr.func, ast.Name) and VmlinuxHandlerRegistry.is_vmlinux_struct(
+            expr.func.id
+        ):
+            return _handle_vmlinux_cast(
+                func,
+                module,
+                builder,
+                expr,
+                local_sym_tab,
+                map_sym_tab,
+                structs_sym_tab,
+            )
         if isinstance(expr.func, ast.Name) and expr.func.id == "deref":
             return _handle_deref_call(expr, local_sym_tab, builder)
 
@@ -502,6 +721,16 @@ def eval_expr(
                 map_sym_tab,
                 structs_sym_tab,
             )
+        if isinstance(expr.func, ast.Name) and (expr.func.id in structs_sym_tab):
+            return _handle_user_defined_struct_cast(
+                func,
+                module,
+                builder,
+                expr,
+                local_sym_tab,
+                map_sym_tab,
+                structs_sym_tab,
+            )
 
         result = CallHandlerRegistry.handle_call(
             expr, module, builder, func, local_sym_tab, map_sym_tab, structs_sym_tab
@@ -512,7 +741,9 @@ def eval_expr(
         logger.warning(f"Unknown call: {ast.dump(expr)}")
         return None
     elif isinstance(expr, ast.Attribute):
-        return _handle_attribute_expr(expr, local_sym_tab, structs_sym_tab, builder)
+        return _handle_attribute_expr(
+            func, expr, local_sym_tab, structs_sym_tab, builder
+        )
     elif isinstance(expr, ast.BinOp):
         return _handle_binary_op(
             func,

pythonbpf/expr/ir_ops.py

@@ -17,34 +17,100 @@ def deref_to_depth(func, builder, val, target_depth):
 
         # dereference with null check
         pointee_type = cur_type.pointee
-        null_check_block = builder.block
-        not_null_block = func.append_basic_block(name=f"deref_not_null_{depth}")
-        merge_block = func.append_basic_block(name=f"deref_merge_{depth}")
 
-        null_ptr = ir.Constant(cur_type, None)
-        is_not_null = builder.icmp_signed("!=", cur_val, null_ptr)
-        logger.debug(f"Inserted null check for pointer at depth {depth}")
+        def load_op(builder, ptr):
+            return builder.load(ptr)
 
-        builder.cbranch(is_not_null, not_null_block, merge_block)
-
-        builder.position_at_end(not_null_block)
-        dereferenced_val = builder.load(cur_val)
-        logger.debug(f"Dereferenced to depth {depth - 1}, type: {pointee_type}")
-        builder.branch(merge_block)
-
-        builder.position_at_end(merge_block)
-        phi = builder.phi(pointee_type, name=f"deref_result_{depth}")
-
-        zero_value = (
-            ir.Constant(pointee_type, 0)
-            if isinstance(pointee_type, ir.IntType)
-            else ir.Constant(pointee_type, None)
+        cur_val = _null_checked_operation(
+            func, builder, cur_val, load_op, pointee_type, f"deref_{depth}"
         )
-        phi.add_incoming(zero_value, null_check_block)
-
-        phi.add_incoming(dereferenced_val, not_null_block)
-
-        # Continue with phi result
-        cur_val = phi
         cur_type = pointee_type
+        logger.debug(f"Dereferenced to depth {depth}, type: {pointee_type}")
     return cur_val
+
+
+def _null_checked_operation(func, builder, ptr, operation, result_type, name_prefix):
+    """
+    Generic null-checked operation on a pointer.
+    """
+    curr_block = builder.block
+    not_null_block = func.append_basic_block(name=f"{name_prefix}_not_null")
+    merge_block = func.append_basic_block(name=f"{name_prefix}_merge")
+
+    null_ptr = ir.Constant(ptr.type, None)
+    is_not_null = builder.icmp_signed("!=", ptr, null_ptr)
+    builder.cbranch(is_not_null, not_null_block, merge_block)
+
+    builder.position_at_end(not_null_block)
+    result = operation(builder, ptr)
+    not_null_after = builder.block
+    builder.branch(merge_block)
+
+    builder.position_at_end(merge_block)
+    phi = builder.phi(result_type, name=f"{name_prefix}_result")
+
+    if isinstance(result_type, ir.IntType):
+        null_val = ir.Constant(result_type, 0)
+    elif isinstance(result_type, ir.PointerType):
+        null_val = ir.Constant(result_type, None)
+    else:
+        null_val = ir.Constant(result_type, ir.Undefined)
+
+    phi.add_incoming(null_val, curr_block)
+    phi.add_incoming(result, not_null_after)
+
+    return phi
+
+
+def access_struct_field(
+    builder, var_ptr, var_type, var_metadata, field_name, structs_sym_tab, func=None
+):
+    """
+    Access a struct field - automatically returns value or pointer based on field type.
+    """
+    metadata = (
+        structs_sym_tab.get(var_metadata)
+        if isinstance(var_metadata, str)
+        else var_metadata
+    )
+    if not metadata or field_name not in metadata.fields:
+        raise ValueError(f"Field '{field_name}' not found in struct")
+
+    field_type = metadata.field_type(field_name)
+    is_ptr_to_struct = isinstance(var_type, ir.PointerType) and isinstance(
+        var_metadata, str
+    )
+
+    # Get struct pointer
+    struct_ptr = builder.load(var_ptr) if is_ptr_to_struct else var_ptr
+
+    should_load = not isinstance(field_type, ir.ArrayType)
+
+    def field_access_op(builder, ptr):
+        typed_ptr = builder.bitcast(ptr, metadata.ir_type.as_pointer())
+        field_ptr = metadata.gep(builder, typed_ptr, field_name)
+        return builder.load(field_ptr) if should_load else field_ptr
+
+    # Handle null check for pointer-to-struct
+    if is_ptr_to_struct:
+        if func is None:
+            raise ValueError("func required for null-safe struct pointer access")
+
+        if should_load:
+            result_type = field_type
+        else:
+            result_type = field_type.as_pointer()
+
+        result = _null_checked_operation(
+            func,
+            builder,
+            struct_ptr,
+            field_access_op,
+            result_type,
+            f"field_{field_name}",
+        )
+        return result, field_type
+
+    field_ptr = metadata.gep(builder, struct_ptr, field_name)
+    result = builder.load(field_ptr) if should_load else field_ptr
+    return result, field_type

pythonbpf/expr/vmlinux_registry.py

@@ -0,0 +1,75 @@
+import ast
+
+from pythonbpf.vmlinux_parser.vmlinux_exports_handler import VmlinuxHandler
+
+
+class VmlinuxHandlerRegistry:
+    """Registry for vmlinux handler operations"""
+
+    _handler = None
+
+    @classmethod
+    def set_handler(cls, handler: VmlinuxHandler):
+        """Set the vmlinux handler"""
+        cls._handler = handler
+
+    @classmethod
+    def get_handler(cls):
+        """Get the vmlinux handler"""
+        return cls._handler
+
+    @classmethod
+    def handle_name(cls, name):
+        """Try to handle a name as vmlinux enum/constant"""
+        if cls._handler is None:
+            return None
+        return cls._handler.handle_vmlinux_enum(name)
+
+    @classmethod
+    def handle_attribute(cls, expr, local_sym_tab, module, builder):
+        """Try to handle an attribute access as vmlinux struct field"""
+        if cls._handler is None:
+            return None
+
+        if isinstance(expr.value, ast.Name):
+            var_name = expr.value.id
+            field_name = expr.attr
+            return cls._handler.handle_vmlinux_struct_field(
+                var_name, field_name, module, builder, local_sym_tab
+            )
+        return None
+
+    @classmethod
+    def get_struct_debug_info(cls, name):
+        if cls._handler is None:
+            return False
+        return cls._handler.get_struct_debug_info(name)
+
+    @classmethod
+    def is_vmlinux_struct(cls, name):
+        """Check if a name refers to a vmlinux struct"""
+        if cls._handler is None:
+            return False
+        return cls._handler.is_vmlinux_struct(name)
+
+    @classmethod
+    def get_struct_type(cls, name):
+        """Try to handle a struct name as vmlinux struct"""
+        if cls._handler is None:
+            return None
+        return cls._handler.get_vmlinux_struct_type(name)
+
+    @classmethod
+    def has_field(cls, vmlinux_struct_name, field_name):
+        """Check if a vmlinux struct has a specific field"""
+        if cls._handler is None:
+            return False
+        return cls._handler.has_field(vmlinux_struct_name, field_name)
+
+    @classmethod
+    def get_field_type(cls, vmlinux_struct_name, field_name):
+        """Get the type of a field in a vmlinux struct"""
+        if cls._handler is None:
+            return None
+        assert isinstance(cls._handler, VmlinuxHandler)
+        return cls._handler.get_field_type(vmlinux_struct_name, field_name)

pythonbpf/functions/function_debug_info.py

@@ -0,0 +1,82 @@
+import ast
+
+import llvmlite.ir as ir
+import logging
+from pythonbpf.debuginfo import DebugInfoGenerator
+from pythonbpf.expr import VmlinuxHandlerRegistry
+import ctypes
+
+logger = logging.getLogger(__name__)
+
+
+def generate_function_debug_info(
+    func_node: ast.FunctionDef, module: ir.Module, func: ir.Function
+):
+    generator = DebugInfoGenerator(module)
+    leading_argument = func_node.args.args[0]
+    leading_argument_name = leading_argument.arg
+    annotation = leading_argument.annotation
+    if func_node.returns is None:
+        # TODO: should check if this logic is consistent with function return type handling elsewhere
+        return_type = ctypes.c_int64()
+    elif hasattr(func_node.returns, "id"):
+        return_type = func_node.returns.id
+        if return_type == "c_int32":
+            return_type = generator.get_int32_type()
+        elif return_type == "c_int64":
+            return_type = generator.get_int64_type()
+        elif return_type == "c_uint32":
+            return_type = generator.get_uint32_type()
+        elif return_type == "c_uint64":
+            return_type = generator.get_uint64_type()
+        else:
+            logger.warning(
+                "Return type should be int32, int64, uint32 or uint64 only. Falling back to int64"
+            )
+            return_type = generator.get_int64_type()
+    else:
+        return_type = ctypes.c_int64()
+    # context processing
+    if annotation is None:
+        logger.warning("Type of context of function not found.")
+        return
+    if hasattr(annotation, "id"):
+        ctype_name = annotation.id
+        if ctype_name == "c_void_p":
+            return
+        elif ctype_name.startswith("ctypes"):
+            raise SyntaxError(
+                "The first argument should always be a pointer to a struct or a void pointer"
+            )
+        context_debug_info = VmlinuxHandlerRegistry.get_struct_debug_info(annotation.id)
+
+        # Create pointer to context this must be created fresh for each function
+        # to avoid circular reference issues when the same struct is used in multiple functions
+        pointer_to_context_debug_info = generator.create_pointer_type(
+            context_debug_info, 64
+        )
+
+        # Create subroutine type - also fresh for each function
+        subroutine_type = generator.create_subroutine_type(
+            return_type, pointer_to_context_debug_info
+        )
+
+        # Create local variable - fresh for each function with unique name
+        context_local_variable = generator.create_local_variable_debug_info(
+            leading_argument_name, 1, pointer_to_context_debug_info
+        )
+
+        retained_nodes = [context_local_variable]
+        logger.info(f"Generating debug info for function {func_node.name}")
+
+        # Create subprogram with is_distinct=True to ensure each function gets unique debug info
+        subprogram_debug_info = generator.create_subprogram(
+            func_node.name, subroutine_type, retained_nodes
+        )
+        generator.add_scope_to_local_variable(
+            context_local_variable, subprogram_debug_info
+        )
+        func.set_metadata("dbg", subprogram_debug_info)
+
+    else:
+        logger.error(f"Invalid annotation type for argument '{leading_argument_name}'")

pythonbpf/functions/functions_pass.py

@@ -7,7 +7,12 @@ from pythonbpf.helper import (
     reset_scratch_pool,
 )
 from pythonbpf.type_deducer import ctypes_to_ir
-from pythonbpf.expr import eval_expr, handle_expr, convert_to_bool
+from pythonbpf.expr import (
+    eval_expr,
+    handle_expr,
+    convert_to_bool,
+    VmlinuxHandlerRegistry,
+)
 from pythonbpf.assign_pass import (
     handle_variable_assignment,
     handle_struct_field_assignment,
@@ -16,8 +21,9 @@ from pythonbpf.allocation_pass import (
     handle_assign_allocation,
     allocate_temp_pool,
     create_targets_and_rvals,
+    LocalSymbol,
 )
-
+from .function_debug_info import generate_function_debug_info
 from .return_utils import handle_none_return, handle_xdp_return, is_xdp_name
 from .function_metadata import get_probe_string, is_global_function, infer_return_type
 
@@ -33,7 +39,7 @@ logger = logging.getLogger(__name__)
 def count_temps_in_call(call_node, local_sym_tab):
     """Count the number of temporary variables needed for a function call."""
 
-    count = 0
+    count = {}
     is_helper = False
 
     # NOTE: We exclude print calls for now
@@ -43,21 +49,28 @@ def count_temps_in_call(call_node, local_sym_tab):
             and call_node.func.id != "print"
         ):
             is_helper = True
+            func_name = call_node.func.id
     elif isinstance(call_node.func, ast.Attribute):
         if HelperHandlerRegistry.has_handler(call_node.func.attr):
             is_helper = True
+            func_name = call_node.func.attr
 
     if not is_helper:
-        return 0
+        return {}  # No temps needed
 
-    for arg in call_node.args:
+    for arg_idx in range(len(call_node.args)):
         # NOTE: Count all non-name arguments
         # For struct fields, if it is being passed as an argument,
         # The struct object should already exist in the local_sym_tab
-        if not isinstance(arg, ast.Name) and not (
+        arg = call_node.args[arg_idx]
+        if isinstance(arg, ast.Name) or (
             isinstance(arg, ast.Attribute) and arg.value.id in local_sym_tab
         ):
-            count += 1
+            continue
+        param_type = HelperHandlerRegistry.get_param_type(func_name, arg_idx)
+        if isinstance(param_type, ir.PointerType):
+            pointee_type = param_type.pointee
+            count[pointee_type] = count.get(pointee_type, 0) + 1
 
     return count
 
@@ -93,11 +106,15 @@ def handle_if_allocation(
 def allocate_mem(
     module, builder, body, func, ret_type, map_sym_tab, local_sym_tab, structs_sym_tab
 ):
-    max_temps_needed = 0
+    max_temps_needed = {}
+
+    def merge_type_counts(count_dict):
+        nonlocal max_temps_needed
+        for typ, cnt in count_dict.items():
+            max_temps_needed[typ] = max(max_temps_needed.get(typ, 0), cnt)
 
     def update_max_temps_for_stmt(stmt):
         nonlocal max_temps_needed
-        temps_needed = 0
 
         if isinstance(stmt, ast.If):
             for s in stmt.body:
@@ -106,10 +123,13 @@ def allocate_mem(
                 update_max_temps_for_stmt(s)
             return
 
+        stmt_temps = {}
         for node in ast.walk(stmt):
             if isinstance(node, ast.Call):
-                temps_needed += count_temps_in_call(node, local_sym_tab)
-        max_temps_needed = max(max_temps_needed, temps_needed)
+                call_temps = count_temps_in_call(node, local_sym_tab)
+                for typ, cnt in call_temps.items():
+                    stmt_temps[typ] = stmt_temps.get(typ, 0) + cnt
+        merge_type_counts(stmt_temps)
 
     for stmt in body:
         update_max_temps_for_stmt(stmt)
@@ -127,7 +147,9 @@ def allocate_mem(
                 structs_sym_tab,
             )
         elif isinstance(stmt, ast.Assign):
-            handle_assign_allocation(builder, stmt, local_sym_tab, structs_sym_tab)
+            handle_assign_allocation(
+                builder, stmt, local_sym_tab, map_sym_tab, structs_sym_tab
+            )
 
     allocate_temp_pool(builder, max_temps_needed, local_sym_tab)
 
@@ -310,7 +332,13 @@ def process_stmt(
 
 
 def process_func_body(
-    module, builder, func_node, func, ret_type, map_sym_tab, structs_sym_tab
+    module,
+    builder,
+    func_node,
+    func,
+    ret_type,
+    map_sym_tab,
+    structs_sym_tab,
 ):
     """Process the body of a bpf function"""
     # TODO: A lot.  We just have print -> bpf_trace_printk for now
@@ -318,6 +346,28 @@ def process_func_body(
 
     local_sym_tab = {}
 
+    # Add the context parameter (first function argument) to the local symbol table
+    if func_node.args.args and len(func_node.args.args) > 0:
+        context_arg = func_node.args.args[0]
+        context_name = context_arg.arg
+
+        if hasattr(context_arg, "annotation") and context_arg.annotation:
+            if isinstance(context_arg.annotation, ast.Name):
+                context_type_name = context_arg.annotation.id
+            elif isinstance(context_arg.annotation, ast.Attribute):
+                context_type_name = context_arg.annotation.attr
+            else:
+                raise TypeError(
+                    f"Unsupported annotation type: {ast.dump(context_arg.annotation)}"
+                )
+            if VmlinuxHandlerRegistry.is_vmlinux_struct(context_type_name):
+                resolved_type = VmlinuxHandlerRegistry.get_struct_type(
+                    context_type_name
+                )
+                context_type = LocalSymbol(None, None, resolved_type)
+                local_sym_tab[context_name] = context_type
+                logger.info(f"Added argument '{context_name}' to local symbol table")
+
     # pre-allocate dynamic variables
     local_sym_tab = allocate_mem(
         module,
@@ -368,7 +418,7 @@ def process_bpf_chunk(func_node, module, return_type, map_sym_tab, structs_sym_t
     func.linkage = "dso_local"
     func.attributes.add("nounwind")
     func.attributes.add("noinline")
-    func.attributes.add("optnone")
+    # func.attributes.add("optnone")
 
     if func_node.args.args:
         # Only look at the first argument for now
@@ -383,7 +433,13 @@ def process_bpf_chunk(func_node, module, return_type, map_sym_tab, structs_sym_t
     builder = ir.IRBuilder(block)
 
     process_func_body(
-        module, builder, func_node, func, ret_type, map_sym_tab, structs_sym_tab
+        module,
+        builder,
+        func_node,
+        func,
+        ret_type,
+        map_sym_tab,
+        structs_sym_tab,
     )
     return func
 
@@ -400,7 +456,7 @@ def func_proc(tree, module, chunks, map_sym_tab, structs_sym_tab):
         func_type = get_probe_string(func_node)
         logger.info(f"Found probe_string of {func_node.name}: {func_type}")
 
-        process_bpf_chunk(
+        func = process_bpf_chunk(
             func_node,
             module,
             ctypes_to_ir(infer_return_type(func_node)),
@@ -408,6 +464,9 @@ def func_proc(tree, module, chunks, map_sym_tab, structs_sym_tab):
             structs_sym_tab,
         )
 
+        logger.info(f"Generating Debug Info for Function {func_node.name}")
+        generate_function_debug_info(func_node, module, func)
+
 
 # TODO: WIP, for string assignment to fixed-size arrays
 def assign_string_to_array(builder, target_array_ptr, source_string_ptr, array_length):

pythonbpf/helper/__init__.py

@@ -1,7 +1,26 @@
 from .helper_registry import HelperHandlerRegistry
 from .helper_utils import reset_scratch_pool
-from .bpf_helper_handler import handle_helper_call, emit_probe_read_kernel_str_call
-from .helpers import ktime, pid, deref, comm, probe_read_str, XDP_DROP, XDP_PASS
+from .bpf_helper_handler import (
+    handle_helper_call,
+    emit_probe_read_kernel_str_call,
+    emit_probe_read_kernel_call,
+)
+from .helpers import (
+    ktime,
+    pid,
+    deref,
+    comm,
+    probe_read_str,
+    random,
+    probe_read,
+    smp_processor_id,
+    uid,
+    skb_store_bytes,
+    get_current_cgroup_id,
+    get_stack,
+    XDP_DROP,
+    XDP_PASS,
+)
 
 
 # Register the helper handler with expr module
@@ -60,11 +79,19 @@ __all__ = [
     "reset_scratch_pool",
     "handle_helper_call",
     "emit_probe_read_kernel_str_call",
+    "emit_probe_read_kernel_call",
+    "get_current_cgroup_id",
     "ktime",
     "pid",
     "deref",
     "comm",
     "probe_read_str",
+    "random",
+    "probe_read",
+    "smp_processor_id",
+    "uid",
+    "skb_store_bytes",
+    "get_stack",
     "XDP_DROP",
     "XDP_PASS",
 ]

pythonbpf/helper/bpf_helper_handler.py

@@ -8,30 +8,45 @@ from .helper_utils import (
     get_flags_val,
     get_data_ptr_and_size,
     get_buffer_ptr_and_size,
-    get_char_array_ptr_and_size,
     get_ptr_from_arg,
+    get_int_value_from_arg,
 )
 from .printk_formatter import simple_string_print, handle_fstring_print
-
-from logging import Logger
+from pythonbpf.maps import BPFMapType
 import logging
 
-logger: Logger = logging.getLogger(__name__)
+logger = logging.getLogger(__name__)
 
 
 class BPFHelperID(Enum):
     BPF_MAP_LOOKUP_ELEM = 1
     BPF_MAP_UPDATE_ELEM = 2
     BPF_MAP_DELETE_ELEM = 3
+    BPF_PROBE_READ = 4
     BPF_KTIME_GET_NS = 5
     BPF_PRINTK = 6
+    BPF_GET_PRANDOM_U32 = 7
+    BPF_GET_SMP_PROCESSOR_ID = 8
+    BPF_SKB_STORE_BYTES = 9
     BPF_GET_CURRENT_PID_TGID = 14
+    BPF_GET_CURRENT_UID_GID = 15
+    BPF_GET_CURRENT_CGROUP_ID = 80
     BPF_GET_CURRENT_COMM = 16
     BPF_PERF_EVENT_OUTPUT = 25
+    BPF_GET_STACK = 67
     BPF_PROBE_READ_KERNEL_STR = 115
+    BPF_PROBE_READ_KERNEL = 113
+    BPF_RINGBUF_OUTPUT = 130
+    BPF_RINGBUF_RESERVE = 131
+    BPF_RINGBUF_SUBMIT = 132
+    BPF_RINGBUF_DISCARD = 133
 
 
-@HelperHandlerRegistry.register("ktime")
+@HelperHandlerRegistry.register(
+    "ktime",
+    param_types=[],
+    return_type=ir.IntType(64),
+)
 def bpf_ktime_get_ns_emitter(
     call,
     map_ptr,
@@ -54,7 +69,38 @@ def bpf_ktime_get_ns_emitter(
     return result, ir.IntType(64)
 
 
-@HelperHandlerRegistry.register("lookup")
+@HelperHandlerRegistry.register(
+    "get_current_cgroup_id",
+    param_types=[],
+    return_type=ir.IntType(64),
+)
+def bpf_get_current_cgroup_id(
+    call,
+    map_ptr,
+    module,
+    builder,
+    func,
+    local_sym_tab=None,
+    struct_sym_tab=None,
+    map_sym_tab=None,
+):
+    """
+    Emit LLVM IR for bpf_get_current_cgroup_id helper function call.
+    """
+    # func is an arg to just have a uniform signature with other emitters
+    helper_id = ir.Constant(ir.IntType(64), BPFHelperID.BPF_GET_CURRENT_CGROUP_ID.value)
+    fn_type = ir.FunctionType(ir.IntType(64), [], var_arg=False)
+    fn_ptr_type = ir.PointerType(fn_type)
+    fn_ptr = builder.inttoptr(helper_id, fn_ptr_type)
+    result = builder.call(fn_ptr, [], tail=False)
+    return result, ir.IntType(64)
+
+
+@HelperHandlerRegistry.register(
+    "lookup",
+    param_types=[ir.PointerType(ir.IntType(64))],
+    return_type=ir.PointerType(ir.IntType(64)),
+)
 def bpf_map_lookup_elem_emitter(
     call,
     map_ptr,
@@ -78,9 +124,9 @@ def bpf_map_lookup_elem_emitter(
     map_void_ptr = builder.bitcast(map_ptr, ir.PointerType())
 
     # TODO: I have changed the return type to i64*, as we are
-    # allocating space for that type in allocate_mem. This is
-    # temporary, and we will honour other widths later. But this
-    # allows us to have cool binary ops on the returned value.
+    #   allocating space for that type in allocate_mem. This is
+    #   temporary, and we will honour other widths later. But this
+    #   allows us to have cool binary ops on the returned value.
     fn_type = ir.FunctionType(
         ir.PointerType(ir.IntType(64)),  # Return type: void*
         [ir.PointerType(), ir.PointerType()],  # Args: (void*, void*)
@@ -96,6 +142,7 @@ def bpf_map_lookup_elem_emitter(
     return result, ir.PointerType()
 
 
+# NOTE: This has special handling so we won't reflect the signature here.
 @HelperHandlerRegistry.register("print")
 def bpf_printk_emitter(
     call,
@@ -144,7 +191,15 @@ def bpf_printk_emitter(
     return True
 
 
-@HelperHandlerRegistry.register("update")
+@HelperHandlerRegistry.register(
+    "update",
+    param_types=[
+        ir.PointerType(ir.IntType(64)),
+        ir.PointerType(ir.IntType(64)),
+        ir.IntType(64),
+    ],
+    return_type=ir.PointerType(ir.IntType(64)),
+)
 def bpf_map_update_elem_emitter(
     call,
     map_ptr,
@@ -199,7 +254,11 @@ def bpf_map_update_elem_emitter(
     return result, None
 
 
-@HelperHandlerRegistry.register("delete")
+@HelperHandlerRegistry.register(
+    "delete",
+    param_types=[ir.PointerType(ir.IntType(64))],
+    return_type=ir.PointerType(ir.IntType(64)),
+)
 def bpf_map_delete_elem_emitter(
     call,
     map_ptr,
@@ -239,7 +298,11 @@ def bpf_map_delete_elem_emitter(
     return result, None
 
 
-@HelperHandlerRegistry.register("comm")
+@HelperHandlerRegistry.register(
+    "comm",
+    param_types=[ir.PointerType(ir.IntType(8))],
+    return_type=ir.IntType(64),
+)
 def bpf_get_current_comm_emitter(
     call,
     map_ptr,
@@ -296,7 +359,11 @@ def bpf_get_current_comm_emitter(
     return result, None
 
 
-@HelperHandlerRegistry.register("pid")
+@HelperHandlerRegistry.register(
+    "pid",
+    param_types=[],
+    return_type=ir.IntType(64),
+)
 def bpf_get_current_pid_tgid_emitter(
     call,
     map_ptr,
@@ -318,12 +385,12 @@ def bpf_get_current_pid_tgid_emitter(
     result = builder.call(fn_ptr, [], tail=False)
 
     # Extract the lower 32 bits (PID) using bitwise AND with 0xFFFFFFFF
+    # TODO: return both PID and TGID if we end up needing TGID somewhere
     mask = ir.Constant(ir.IntType(64), 0xFFFFFFFF)
     pid = builder.and_(result, mask)
     return pid, ir.IntType(64)
 
 
-@HelperHandlerRegistry.register("output")
 def bpf_perf_event_output_handler(
     call,
     map_ptr,
@@ -334,6 +401,10 @@ def bpf_perf_event_output_handler(
     struct_sym_tab=None,
     map_sym_tab=None,
 ):
+    """
+    Emit LLVM IR for bpf_perf_event_output helper function call.
+    """
+
     if len(call.args) != 1:
         raise ValueError(
             f"Perf event output expects exactly one argument, got {len(call.args)}"
@@ -371,6 +442,98 @@ def bpf_perf_event_output_handler(
     return result, None
 
 
+def bpf_ringbuf_output_emitter(
+    call,
+    map_ptr,
+    module,
+    builder,
+    func,
+    local_sym_tab=None,
+    struct_sym_tab=None,
+    map_sym_tab=None,
+):
+    """
+    Emit LLVM IR for bpf_ringbuf_output helper function call.
+    """
+
+    if len(call.args) != 1:
+        raise ValueError(
+            f"Ringbuf output expects exactly one argument, got {len(call.args)}"
+        )
+    data_arg = call.args[0]
+    data_ptr, size_val = get_data_ptr_and_size(data_arg, local_sym_tab, struct_sym_tab)
+    flags_val = ir.Constant(ir.IntType(64), 0)
+
+    map_void_ptr = builder.bitcast(map_ptr, ir.PointerType())
+    data_void_ptr = builder.bitcast(data_ptr, ir.PointerType())
+    fn_type = ir.FunctionType(
+        ir.IntType(64),
+        [
+            ir.PointerType(),
+            ir.PointerType(),
+            ir.IntType(64),
+            ir.IntType(64),
+        ],
+        var_arg=False,
+    )
+    fn_ptr_type = ir.PointerType(fn_type)
+
+    # helper id
+    fn_addr = ir.Constant(ir.IntType(64), BPFHelperID.BPF_RINGBUF_OUTPUT.value)
+    fn_ptr = builder.inttoptr(fn_addr, fn_ptr_type)
+
+    result = builder.call(
+        fn_ptr, [map_void_ptr, data_void_ptr, size_val, flags_val], tail=False
+    )
+    return result, None
+
+
+@HelperHandlerRegistry.register(
+    "output",
+    param_types=[ir.PointerType(ir.IntType(8))],
+    return_type=ir.IntType(64),
+)
+def handle_output_helper(
+    call,
+    map_ptr,
+    module,
+    builder,
+    func,
+    local_sym_tab=None,
+    struct_sym_tab=None,
+    map_sym_tab=None,
+):
+    """
+    Route output helper to the appropriate emitter based on map type.
+    """
+    match map_sym_tab[map_ptr.name].type:
+        case BPFMapType.PERF_EVENT_ARRAY:
+            return bpf_perf_event_output_handler(
+                call,
+                map_ptr,
+                module,
+                builder,
+                func,
+                local_sym_tab,
+                struct_sym_tab,
+                map_sym_tab,
+            )
+        case BPFMapType.RINGBUF:
+            return bpf_ringbuf_output_emitter(
+                call,
+                map_ptr,
+                module,
+                builder,
+                func,
+                local_sym_tab,
+                struct_sym_tab,
+                map_sym_tab,
+            )
+        case _:
+            logger.error("Unsupported map type for output helper.")
+    raise NotImplementedError("Output helper for this map type is not implemented.")
+
+
 def emit_probe_read_kernel_str_call(builder, dst_ptr, dst_size, src_ptr):
     """Emit LLVM IR call to bpf_probe_read_kernel_str"""
 
@@ -398,7 +561,14 @@ def emit_probe_read_kernel_str_call(builder, dst_ptr, dst_size, src_ptr):
     return result
 
 
-@HelperHandlerRegistry.register("probe_read_str")
+@HelperHandlerRegistry.register(
+    "probe_read_str",
+    param_types=[
+        ir.PointerType(ir.IntType(8)),
+        ir.PointerType(ir.IntType(8)),
+    ],
+    return_type=ir.IntType(64),
+)
 def bpf_probe_read_kernel_str_emitter(
     call,
     map_ptr,
@@ -417,8 +587,8 @@ def bpf_probe_read_kernel_str_emitter(
         )
 
     # Get destination buffer (char array -> i8*)
-    dst_ptr, dst_size = get_char_array_ptr_and_size(
-        call.args[0], builder, local_sym_tab, struct_sym_tab
+    dst_ptr, dst_size = get_or_create_ptr_from_arg(
+        func, module, call.args[0], builder, local_sym_tab, map_sym_tab, struct_sym_tab
     )
 
     # Get source pointer (evaluate expression)
@@ -433,6 +603,499 @@ def bpf_probe_read_kernel_str_emitter(
     return result, ir.IntType(64)
 
 
+def emit_probe_read_kernel_call(builder, dst_ptr, dst_size, src_ptr):
+    """Emit LLVM IR call to bpf_probe_read_kernel"""
+
+    fn_type = ir.FunctionType(
+        ir.IntType(64),
+        [ir.PointerType(), ir.IntType(32), ir.PointerType()],
+        var_arg=False,
+    )
+    fn_ptr = builder.inttoptr(
+        ir.Constant(ir.IntType(64), BPFHelperID.BPF_PROBE_READ_KERNEL.value),
+        ir.PointerType(fn_type),
+    )
+
+    result = builder.call(
+        fn_ptr,
+        [
+            builder.bitcast(dst_ptr, ir.PointerType()),
+            ir.Constant(ir.IntType(32), dst_size),
+            builder.bitcast(src_ptr, ir.PointerType()),
+        ],
+        tail=False,
+    )
+
+    logger.info(f"Emitted bpf_probe_read_kernel (size={dst_size})")
+    return result
+
+
+@HelperHandlerRegistry.register(
+    "probe_read_kernel",
+    param_types=[
+        ir.PointerType(ir.IntType(8)),
+        ir.PointerType(ir.IntType(8)),
+    ],
+    return_type=ir.IntType(64),
+)
+def bpf_probe_read_kernel_emitter(
+    call,
+    map_ptr,
+    module,
+    builder,
+    func,
+    local_sym_tab=None,
+    struct_sym_tab=None,
+    map_sym_tab=None,
+):
+    """Emit LLVM IR for bpf_probe_read_kernel helper."""
+
+    if len(call.args) != 2:
+        raise ValueError(
+            f"probe_read_kernel expects 2 args (dst, src), got {len(call.args)}"
+        )
+
+    # Get destination buffer (char array -> i8*)
+    dst_ptr, dst_size = get_or_create_ptr_from_arg(
+        func, module, call.args[0], builder, local_sym_tab, map_sym_tab, struct_sym_tab
+    )
+
+    # Get source pointer (evaluate expression)
+    src_ptr, src_type = get_ptr_from_arg(
+        call.args[1], func, module, builder, local_sym_tab, map_sym_tab, struct_sym_tab
+    )
+
+    # Emit the helper call
+    result = emit_probe_read_kernel_call(builder, dst_ptr, dst_size, src_ptr)
+
+    logger.info(f"Emitted bpf_probe_read_kernel (size={dst_size})")
+    return result, ir.IntType(64)
+
+
+@HelperHandlerRegistry.register(
+    "random",
+    param_types=[],
+    return_type=ir.IntType(32),
+)
+def bpf_get_prandom_u32_emitter(
+    call,
+    map_ptr,
+    module,
+    builder,
+    func,
+    local_sym_tab=None,
+    struct_sym_tab=None,
+    map_sym_tab=None,
+):
+    """
+    Emit LLVM IR for bpf_get_prandom_u32 helper function call.
+    """
+    helper_id = ir.Constant(ir.IntType(64), BPFHelperID.BPF_GET_PRANDOM_U32.value)
+    fn_type = ir.FunctionType(ir.IntType(32), [], var_arg=False)
+    fn_ptr_type = ir.PointerType(fn_type)
+    fn_ptr = builder.inttoptr(helper_id, fn_ptr_type)
+    result = builder.call(fn_ptr, [], tail=False)
+    return result, ir.IntType(32)
+
+
+@HelperHandlerRegistry.register(
+    "probe_read",
+    param_types=[
+        ir.PointerType(ir.IntType(8)),
+        ir.IntType(32),
+        ir.PointerType(ir.IntType(8)),
+    ],
+    return_type=ir.IntType(64),
+)
+def bpf_probe_read_emitter(
+    call,
+    map_ptr,
+    module,
+    builder,
+    func,
+    local_sym_tab=None,
+    struct_sym_tab=None,
+    map_sym_tab=None,
+):
+    """
+    Emit LLVM IR for bpf_probe_read helper function
+    """
+
+    if len(call.args) != 3:
+        logger.warn("Expected 3 args for probe_read helper")
+        return
+    dst_ptr = get_or_create_ptr_from_arg(
+        func,
+        module,
+        call.args[0],
+        builder,
+        local_sym_tab,
+        map_sym_tab,
+        struct_sym_tab,
+        ir.IntType(8),
+    )
+    size_val = get_int_value_from_arg(
+        call.args[1],
+        func,
+        module,
+        builder,
+        local_sym_tab,
+        map_sym_tab,
+        struct_sym_tab,
+    )
+    src_ptr = get_or_create_ptr_from_arg(
+        func,
+        module,
+        call.args[2],
+        builder,
+        local_sym_tab,
+        map_sym_tab,
+        struct_sym_tab,
+        ir.IntType(8),
+    )
+    fn_type = ir.FunctionType(
+        ir.IntType(64),
+        [ir.PointerType(), ir.IntType(32), ir.PointerType()],
+        var_arg=False,
+    )
+    fn_ptr = builder.inttoptr(
+        ir.Constant(ir.IntType(64), BPFHelperID.BPF_PROBE_READ.value),
+        ir.PointerType(fn_type),
+    )
+    result = builder.call(
+        fn_ptr,
+        [
+            builder.bitcast(dst_ptr, ir.PointerType()),
+            builder.trunc(size_val, ir.IntType(32)),
+            builder.bitcast(src_ptr, ir.PointerType()),
+        ],
+        tail=False,
+    )
+    logger.info(f"Emitted bpf_probe_read (size={size_val})")
+    return result, ir.IntType(64)
+
+
+@HelperHandlerRegistry.register(
+    "smp_processor_id",
+    param_types=[],
+    return_type=ir.IntType(32),
+)
+def bpf_get_smp_processor_id_emitter(
+    call,
+    map_ptr,
+    module,
+    builder,
+    func,
+    local_sym_tab=None,
+    struct_sym_tab=None,
+    map_sym_tab=None,
+):
+    """
+    Emit LLVM IR for bpf_get_smp_processor_id helper function call.
+    """
+    helper_id = ir.Constant(ir.IntType(64), BPFHelperID.BPF_GET_SMP_PROCESSOR_ID.value)
+    fn_type = ir.FunctionType(ir.IntType(32), [], var_arg=False)
+    fn_ptr_type = ir.PointerType(fn_type)
+    fn_ptr = builder.inttoptr(helper_id, fn_ptr_type)
+    result = builder.call(fn_ptr, [], tail=False)
+    logger.info("Emitted bpf_get_smp_processor_id call")
+    return result, ir.IntType(32)
+
+
+@HelperHandlerRegistry.register(
+    "uid",
+    param_types=[],
+    return_type=ir.IntType(64),
+)
+def bpf_get_current_uid_gid_emitter(
+    call,
+    map_ptr,
+    module,
+    builder,
+    func,
+    local_sym_tab=None,
+    struct_sym_tab=None,
+    map_sym_tab=None,
+):
+    """
+    Emit LLVM IR for bpf_get_current_uid_gid helper function call.
+    """
+    helper_id = ir.Constant(ir.IntType(64), BPFHelperID.BPF_GET_CURRENT_UID_GID.value)
+    fn_type = ir.FunctionType(ir.IntType(64), [], var_arg=False)
+    fn_ptr_type = ir.PointerType(fn_type)
+    fn_ptr = builder.inttoptr(helper_id, fn_ptr_type)
+    result = builder.call(fn_ptr, [], tail=False)
+
+    # Extract the lower 32 bits (UID) using bitwise AND with 0xFFFFFFFF
+    # TODO: return both UID and GID if we end up needing GID somewhere
+    mask = ir.Constant(ir.IntType(64), 0xFFFFFFFF)
+    pid = builder.and_(result, mask)
+    return pid, ir.IntType(64)
+
+
+@HelperHandlerRegistry.register(
+    "skb_store_bytes",
+    param_types=[
+        ir.IntType(32),
+        ir.PointerType(ir.IntType(8)),
+        ir.IntType(32),
+        ir.IntType(64),
+    ],
+    return_type=ir.IntType(64),
+)
+def bpf_skb_store_bytes_emitter(
+    call,
+    map_ptr,
+    module,
+    builder,
+    func,
+    local_sym_tab=None,
+    struct_sym_tab=None,
+    map_sym_tab=None,
+):
+    """
+    Emit LLVM IR for bpf_skb_store_bytes helper function call.
+    Expected call signature: skb_store_bytes(skb, offset, from, len, flags)
+    """
+
+    args_signature = [
+        ir.PointerType(),  # skb pointer
+        ir.IntType(32),  # offset
+        ir.PointerType(),  # from
+        ir.IntType(32),  # len
+        ir.IntType(64),  # flags
+    ]
+
+    if len(call.args) not in (3, 4):
+        raise ValueError(
+            f"skb_store_bytes expects 3 or 4 args (offset, from, len, flags), got {len(call.args)}"
+        )
+
+    skb_ptr = func.args[0]  # First argument to the function is skb
+    offset_val = get_int_value_from_arg(
+        call.args[0],
+        func,
+        module,
+        builder,
+        local_sym_tab,
+        map_sym_tab,
+        struct_sym_tab,
+    )
+    from_ptr = get_or_create_ptr_from_arg(
+        func,
+        module,
+        call.args[1],
+        builder,
+        local_sym_tab,
+        map_sym_tab,
+        struct_sym_tab,
+        args_signature[2],
+    )
+    len_val = get_int_value_from_arg(
+        call.args[2],
+        func,
+        module,
+        builder,
+        local_sym_tab,
+        map_sym_tab,
+        struct_sym_tab,
+    )
+    if len(call.args) == 4:
+        flags_val = get_flags_val(call.args[3], builder, local_sym_tab)
+    else:
+        flags_val = 0
+    if isinstance(flags_val, int):
+        flags = ir.Constant(ir.IntType(64), flags_val)
+    else:
+        flags = flags_val
+    fn_type = ir.FunctionType(
+        ir.IntType(64),
+        args_signature,
+        var_arg=False,
+    )
+    fn_ptr = builder.inttoptr(
+        ir.Constant(ir.IntType(64), BPFHelperID.BPF_SKB_STORE_BYTES.value),
+        ir.PointerType(fn_type),
+    )
+    result = builder.call(
+        fn_ptr,
+        [
+            builder.bitcast(skb_ptr, ir.PointerType()),
+            builder.trunc(offset_val, ir.IntType(32)),
+            builder.bitcast(from_ptr, ir.PointerType()),
+            builder.trunc(len_val, ir.IntType(32)),
+            flags,
+        ],
+        tail=False,
+    )
+    logger.info("Emitted bpf_skb_store_bytes call")
+    return result, ir.IntType(64)
+
+
+@HelperHandlerRegistry.register(
+    "reserve",
+    param_types=[ir.IntType(64)],
+    return_type=ir.PointerType(ir.IntType(8)),
+)
+def bpf_ringbuf_reserve_emitter(
+    call,
+    map_ptr,
+    module,
+    builder,
+    func,
+    local_sym_tab=None,
+    struct_sym_tab=None,
+    map_sym_tab=None,
+):
+    """
+    Emit LLVM IR for bpf_ringbuf_reserve helper function call.
+    Expected call signature: ringbuf.reserve(size)
+    """
+
+    if len(call.args) != 1:
+        raise ValueError(
+            f"ringbuf.reserve expects exactly one argument (size), got {len(call.args)}"
+        )
+
+    size_val = get_int_value_from_arg(
+        call.args[0],
+        func,
+        module,
+        builder,
+        local_sym_tab,
+        map_sym_tab,
+        struct_sym_tab,
+    )
+
+    map_void_ptr = builder.bitcast(map_ptr, ir.PointerType())
+    fn_type = ir.FunctionType(
+        ir.PointerType(ir.IntType(8)),
+        [ir.PointerType(), ir.IntType(64)],
+        var_arg=False,
+    )
+    fn_ptr_type = ir.PointerType(fn_type)
+
+    fn_addr = ir.Constant(ir.IntType(64), BPFHelperID.BPF_RINGBUF_RESERVE.value)
+    fn_ptr = builder.inttoptr(fn_addr, fn_ptr_type)
+
+    result = builder.call(fn_ptr, [map_void_ptr, size_val], tail=False)
+
+    return result, ir.PointerType(ir.IntType(8))
+
+
+@HelperHandlerRegistry.register(
+    "submit",
+    param_types=[ir.PointerType(ir.IntType(8)), ir.IntType(64)],
+    return_type=ir.VoidType(),
+)
+def bpf_ringbuf_submit_emitter(
+    call,
+    map_ptr,
+    module,
+    builder,
+    func,
+    local_sym_tab=None,
+    struct_sym_tab=None,
+    map_sym_tab=None,
+):
+    """
+    Emit LLVM IR for bpf_ringbuf_submit helper function call.
+    Expected call signature: ringbuf.submit(data, flags=0)
+    """
+
+    if len(call.args) not in (1, 2):
+        raise ValueError(
+            f"ringbuf.submit expects 1 or 2 args (data, flags), got {len(call.args)}"
+        )
+
+    data_arg = call.args[0]
+    flags_arg = call.args[1] if len(call.args) == 2 else None
+
+    data_ptr = get_or_create_ptr_from_arg(
+        func,
+        module,
+        data_arg,
+        builder,
+        local_sym_tab,
+        map_sym_tab,
+        struct_sym_tab,
+        ir.PointerType(ir.IntType(8)),
+    )
+
+    flags_const = get_flags_val(flags_arg, builder, local_sym_tab)
+    if isinstance(flags_const, int):
+        flags_const = ir.Constant(ir.IntType(64), flags_const)
+
+    map_void_ptr = builder.bitcast(map_ptr, ir.PointerType())
+    fn_type = ir.FunctionType(
+        ir.VoidType(),
+        [ir.PointerType(), ir.PointerType(), ir.IntType(64)],
+        var_arg=False,
+    )
+    fn_ptr_type = ir.PointerType(fn_type)
+
+    fn_addr = ir.Constant(ir.IntType(64), BPFHelperID.BPF_RINGBUF_SUBMIT.value)
+    fn_ptr = builder.inttoptr(fn_addr, fn_ptr_type)
+
+    result = builder.call(fn_ptr, [map_void_ptr, data_ptr, flags_const], tail=False)
+
+    return result, None
+
+
+@HelperHandlerRegistry.register(
+    "get_stack",
+    param_types=[ir.PointerType(ir.IntType(8)), ir.IntType(64)],
+    return_type=ir.IntType(64),
+)
+def bpf_get_stack_emitter(
+    call,
+    map_ptr,
+    module,
+    builder,
+    func,
+    local_sym_tab=None,
+    struct_sym_tab=None,
+    map_sym_tab=None,
+):
+    """
+    Emit LLVM IR for bpf_get_stack helper function call.
+    """
+    if len(call.args) not in (1, 2):
+        raise ValueError(
+            f"get_stack expects atmost two arguments (buf, flags), got {len(call.args)}"
+        )
+    ctx_ptr = func.args[0]  # First argument to the function is ctx
+    buf_arg = call.args[0]
+    flags_arg = call.args[1] if len(call.args) == 2 else None
+    buf_ptr, buf_size = get_buffer_ptr_and_size(
+        buf_arg, builder, local_sym_tab, struct_sym_tab
+    )
+    flags_val = get_flags_val(flags_arg, builder, local_sym_tab)
+    if isinstance(flags_val, int):
+        flags_val = ir.Constant(ir.IntType(64), flags_val)
+
+    buf_void_ptr = builder.bitcast(buf_ptr, ir.PointerType())
+    fn_type = ir.FunctionType(
+        ir.IntType(64),
+        [
+            ir.PointerType(ir.IntType(8)),
+            ir.PointerType(),
+            ir.IntType(64),
+            ir.IntType(64),
+        ],
+        var_arg=False,
+    )
+    fn_ptr_type = ir.PointerType(fn_type)
+    fn_addr = ir.Constant(ir.IntType(64), BPFHelperID.BPF_GET_STACK.value)
+    fn_ptr = builder.inttoptr(fn_addr, fn_ptr_type)
+    result = builder.call(
+        fn_ptr,
+        [ctx_ptr, buf_void_ptr, ir.Constant(ir.IntType(64), buf_size), flags_val],
+        tail=False,
+    )
+    return result, ir.IntType(64)
+
+
 def handle_helper_call(
     call,
     module,
@@ -487,6 +1150,6 @@ def handle_helper_call(
         if not map_sym_tab or map_name not in map_sym_tab:
             raise ValueError(f"Map '{map_name}' not found in symbol table")
 
-        return invoke_helper(method_name, map_sym_tab[map_name])
+        return invoke_helper(method_name, map_sym_tab[map_name].sym)
 
     return None

pythonbpf/helper/helper_registry.py

@@ -1,17 +1,31 @@
+from dataclasses import dataclass
+from llvmlite import ir
 from typing import Callable
 
 
+@dataclass
+class HelperSignature:
+    """Signature of a BPF helper function"""
+
+    arg_types: list[ir.Type]
+    return_type: ir.Type
+    func: Callable
+
+
 class HelperHandlerRegistry:
     """Registry for BPF helpers"""
 
-    _handlers: dict[str, Callable] = {}
+    _handlers: dict[str, HelperSignature] = {}
 
     @classmethod
-    def register(cls, helper_name):
+    def register(cls, helper_name, param_types=None, return_type=None):
         """Decorator to register a handler function for a helper"""
 
         def decorator(func):
-            cls._handlers[helper_name] = func
+            helper_sig = HelperSignature(
+                arg_types=param_types, return_type=return_type, func=func
+            )
+            cls._handlers[helper_name] = helper_sig
             return func
 
         return decorator
@@ -19,9 +33,29 @@ class HelperHandlerRegistry:
     @classmethod
     def get_handler(cls, helper_name):
         """Get the handler function for a helper"""
-        return cls._handlers.get(helper_name)
+        handler = cls._handlers.get(helper_name)
+        return handler.func if handler else None
 
     @classmethod
     def has_handler(cls, helper_name):
         """Check if a handler function is registered for a helper"""
         return helper_name in cls._handlers
+
+    @classmethod
+    def get_signature(cls, helper_name):
+        """Get the signature of a helper function"""
+        return cls._handlers.get(helper_name)
+
+    @classmethod
+    def get_param_type(cls, helper_name, index):
+        """Get the type of a parameter of a helper function by the index"""
+        signature = cls.get_signature(helper_name)
+        if signature and signature.arg_types and 0 <= index < len(signature.arg_types):
+            return signature.arg_types[index]
+        return None
+
+    @classmethod
+    def get_return_type(cls, helper_name):
+        """Get the return type of a helper function"""
+        signature = cls.get_signature(helper_name)
+        return signature.return_type if signature else None

pythonbpf/helper/helper_utils.py

@@ -5,6 +5,7 @@ from llvmlite import ir
 from pythonbpf.expr import (
     get_operand_value,
     eval_expr,
+    access_struct_field,
 )
 
 logger = logging.getLogger(__name__)
@@ -14,26 +15,43 @@ class ScratchPoolManager:
     """Manage the temporary helper variables in local_sym_tab"""
 
     def __init__(self):
-        self._counter = 0
+        self._counters = {}
 
     @property
     def counter(self):
-        return self._counter
+        return sum(self._counters.values())
 
     def reset(self):
-        self._counter = 0
+        self._counters.clear()
         logger.debug("Scratch pool counter reset to 0")
 
-    def get_next_temp(self, local_sym_tab):
-        temp_name = f"__helper_temp_{self._counter}"
-        self._counter += 1
+    def _get_type_name(self, ir_type):
+        if isinstance(ir_type, ir.PointerType):
+            return "ptr"
+        elif isinstance(ir_type, ir.IntType):
+            return f"i{ir_type.width}"
+        elif isinstance(ir_type, ir.ArrayType):
+            return f"[{ir_type.count}x{self._get_type_name(ir_type.element)}]"
+        else:
+            return str(ir_type).replace(" ", "")
+
+    def get_next_temp(self, local_sym_tab, expected_type=None):
+        # Default to i64 if no expected type provided
+        type_name = self._get_type_name(expected_type) if expected_type else "i64"
+        if type_name not in self._counters:
+            self._counters[type_name] = 0
+
+        counter = self._counters[type_name]
+        temp_name = f"__helper_temp_{type_name}_{counter}"
+        self._counters[type_name] += 1
 
         if temp_name not in local_sym_tab:
             raise ValueError(
                 f"Scratch pool exhausted or inadequate: {temp_name}. "
-                f"Current counter: {self._counter}"
+                f"Type: {type_name} Counter: {counter}"
             )
 
+        logger.debug(f"Using {temp_name} for type {type_name}")
         return local_sym_tab[temp_name].var, temp_name
 
 
@@ -60,24 +78,73 @@ def get_var_ptr_from_name(var_name, local_sym_tab):
 def create_int_constant_ptr(value, builder, local_sym_tab, int_width=64):
     """Create a pointer to an integer constant."""
 
-    # Default to 64-bit integer
-    ptr, temp_name = _temp_pool_manager.get_next_temp(local_sym_tab)
+    int_type = ir.IntType(int_width)
+    ptr, temp_name = _temp_pool_manager.get_next_temp(local_sym_tab, int_type)
     logger.info(f"Using temp variable '{temp_name}' for int constant {value}")
-    const_val = ir.Constant(ir.IntType(int_width), value)
+    const_val = ir.Constant(int_type, value)
     builder.store(const_val, ptr)
     return ptr
 
 
 def get_or_create_ptr_from_arg(
-    func, module, arg, builder, local_sym_tab, map_sym_tab, struct_sym_tab=None
+    func,
+    module,
+    arg,
+    builder,
+    local_sym_tab,
+    map_sym_tab,
+    struct_sym_tab=None,
+    expected_type=None,
 ):
     """Extract or create pointer from the call arguments."""
 
+    logger.info(f"Getting pointer from arg: {ast.dump(arg)}")
+    sz = None
     if isinstance(arg, ast.Name):
+        # Stack space is already allocated
         ptr = get_var_ptr_from_name(arg.id, local_sym_tab)
     elif isinstance(arg, ast.Constant) and isinstance(arg.value, int):
-        ptr = create_int_constant_ptr(arg.value, builder, local_sym_tab)
+        int_width = 64  # Default to i64
+        if expected_type and isinstance(expected_type, ir.IntType):
+            int_width = expected_type.width
+        ptr = create_int_constant_ptr(arg.value, builder, local_sym_tab, int_width)
+    elif isinstance(arg, ast.Attribute):
+        # A struct field
+        struct_name = arg.value.id
+        field_name = arg.attr
+
+        if not local_sym_tab or struct_name not in local_sym_tab:
+            raise ValueError(f"Struct '{struct_name}' not found")
+
+        struct_type = local_sym_tab[struct_name].metadata
+        if not struct_sym_tab or struct_type not in struct_sym_tab:
+            raise ValueError(f"Struct type '{struct_type}' not found")
+
+        struct_info = struct_sym_tab[struct_type]
+        if field_name not in struct_info.fields:
+            raise ValueError(
+                f"Field '{field_name}' not found in struct '{struct_name}'"
+            )
+
+        field_type = struct_info.field_type(field_name)
+        struct_ptr = local_sym_tab[struct_name].var
+
+        # Special handling for char arrays
+        if (
+            isinstance(field_type, ir.ArrayType)
+            and isinstance(field_type.element, ir.IntType)
+            and field_type.element.width == 8
+        ):
+            ptr, sz = get_char_array_ptr_and_size(
+                arg, builder, local_sym_tab, struct_sym_tab, func
+            )
+            if not ptr:
+                raise ValueError("Failed to get char array pointer from struct field")
+        else:
+            ptr = struct_info.gep(builder, struct_ptr, field_name)
+
     else:
+        # NOTE: For any integer expression reaching this branch, it is probably a struct field or a binop
         # Evaluate the expression and store the result in a temp variable
         val = get_operand_value(
             func, module, arg, builder, local_sym_tab, map_sym_tab, struct_sym_tab
@@ -85,13 +152,20 @@ def get_or_create_ptr_from_arg(
         if val is None:
             raise ValueError("Failed to evaluate expression for helper arg.")
 
-        # NOTE: We assume the result is an int64 for now
-        # if isinstance(arg, ast.Attribute):
-        # return val
-        ptr, temp_name = _temp_pool_manager.get_next_temp(local_sym_tab)
+        ptr, temp_name = _temp_pool_manager.get_next_temp(local_sym_tab, expected_type)
         logger.info(f"Using temp variable '{temp_name}' for expression result")
+        if (
+            isinstance(val.type, ir.IntType)
+            and expected_type
+            and val.type.width > expected_type.width
+        ):
+            val = builder.trunc(val, expected_type)
         builder.store(val, ptr)
 
+    # NOTE: For char arrays, also return size
+    if sz:
+        return ptr, sz
+
     return ptr
 
 
@@ -193,7 +267,9 @@ def get_buffer_ptr_and_size(buf_arg, builder, local_sym_tab, struct_sym_tab):
         )
 
 
-def get_char_array_ptr_and_size(buf_arg, builder, local_sym_tab, struct_sym_tab):
+def get_char_array_ptr_and_size(
+    buf_arg, builder, local_sym_tab, struct_sym_tab, func=None
+):
     """Get pointer to char array and its size."""
 
     # Struct field: obj.field
@@ -204,20 +280,39 @@ def get_char_array_ptr_and_size(buf_arg, builder, local_sym_tab, struct_sym_tab)
         if not (local_sym_tab and var_name in local_sym_tab):
             raise ValueError(f"Variable '{var_name}' not found")
 
-        struct_type = local_sym_tab[var_name].metadata
-        if not (struct_sym_tab and struct_type in struct_sym_tab):
-            raise ValueError(f"Struct type '{struct_type}' not found")
+        struct_ptr, struct_type, struct_metadata = local_sym_tab[var_name]
+        if not (struct_sym_tab and struct_metadata in struct_sym_tab):
+            raise ValueError(f"Struct type '{struct_metadata}' not found")
 
-        struct_info = struct_sym_tab[struct_type]
+        struct_info = struct_sym_tab[struct_metadata]
         if field_name not in struct_info.fields:
             raise ValueError(f"Field '{field_name}' not found")
 
         field_type = struct_info.field_type(field_name)
         if not _is_char_array(field_type):
-            raise ValueError("Expected char array field")
+            logger.info(
+                "Field is not a char array, falling back to int or ptr detection"
+            )
+            return None, 0
 
-        struct_ptr = local_sym_tab[var_name].var
-        field_ptr = struct_info.gep(builder, struct_ptr, field_name)
+        # Check if char array
+        if not (
+            isinstance(field_type, ir.ArrayType)
+            and isinstance(field_type.element, ir.IntType)
+            and field_type.element.width == 8
+        ):
+            logger.warning("Field is not a char array")
+            return None, 0
+
+        field_ptr, _ = access_struct_field(
+            builder,
+            struct_ptr,
+            struct_type,
+            struct_metadata,
+            field_name,
+            struct_sym_tab,
+            func,
+        )
 
         # GEP to first element: [N x i8]* -> i8*
         buf_ptr = builder.gep(
@@ -236,7 +331,7 @@ def get_char_array_ptr_and_size(buf_arg, builder, local_sym_tab, struct_sym_tab)
         var_ptr = local_sym_tab[var_name].var
         var_type = local_sym_tab[var_name].ir_type
 
-        if not isinstance(var_type, ir.PointerType) and not isinstance(
+        if not isinstance(var_type, ir.PointerType) or not isinstance(
             var_type.pointee, ir.IntType(8)
         ):
             raise ValueError("Expected str ptr variable")
@@ -274,3 +369,23 @@ def get_ptr_from_arg(
         raise ValueError(f"Expected pointer type, got {val_type}")
 
     return val, val_type
+
+
+def get_int_value_from_arg(
+    arg, func, module, builder, local_sym_tab, map_sym_tab, struct_sym_tab
+):
+    """Evaluate argument and return integer value"""
+
+    result = eval_expr(
+        func, module, builder, arg, local_sym_tab, map_sym_tab, struct_sym_tab
+    )
+
+    if not result:
+        raise ValueError("Failed to evaluate argument")
+
+    val, val_type = result
+
+    if not isinstance(val_type, ir.IntType):
+        raise ValueError(f"Expected integer type, got {val_type}")
+
+    return val

pythonbpf/helper/helpers.py

@@ -27,6 +27,41 @@ def probe_read_str(dst, src):
     return ctypes.c_int64(0)
 
 
+def random():
+    """get a pseudorandom u32 number"""
+    return ctypes.c_int32(0)
+
+
+def probe_read(dst, size, src):
+    """Safely read data from kernel memory"""
+    return ctypes.c_int64(0)
+
+
+def smp_processor_id():
+    """get the current CPU id"""
+    return ctypes.c_int32(0)
+
+
+def uid():
+    """get current user id"""
+    return ctypes.c_int32(0)
+
+
+def skb_store_bytes(offset, from_buf, size, flags=0):
+    """store bytes into a socket buffer"""
+    return ctypes.c_int64(0)
+
+
+def get_stack(buf, flags=0):
+    """get the current stack trace"""
+    return ctypes.c_int64(0)
+
+
+def get_current_cgroup_id():
+    """Get the current cgroup ID"""
+    return ctypes.c_int64(0)
+
+
 XDP_ABORTED = ctypes.c_int64(0)
 XDP_DROP = ctypes.c_int64(1)
 XDP_PASS = ctypes.c_int64(2)

pythonbpf/helper/printk_formatter.py

@@ -3,6 +3,8 @@ import logging
 
 from llvmlite import ir
 from pythonbpf.expr import eval_expr, get_base_type_and_depth, deref_to_depth
+from pythonbpf.expr.vmlinux_registry import VmlinuxHandlerRegistry
+from pythonbpf.helper.helper_utils import get_char_array_ptr_and_size
 
 logger = logging.getLogger(__name__)
 
@@ -108,6 +110,16 @@ def _process_name_in_fval(name_node, fmt_parts, exprs, local_sym_tab):
     if local_sym_tab and name_node.id in local_sym_tab:
         _, var_type, tmp = local_sym_tab[name_node.id]
         _populate_fval(var_type, name_node, fmt_parts, exprs)
+    else:
+        # Try to resolve through vmlinux registry if not in local symbol table
+        result = VmlinuxHandlerRegistry.handle_name(name_node.id)
+        if result:
+            val, var_type = result
+            _populate_fval(var_type, name_node, fmt_parts, exprs)
+        else:
+            raise ValueError(
+                f"Variable '{name_node.id}' not found in symbol table or vmlinux"
+            )
 
 
 def _process_attr_in_fval(attr_node, fmt_parts, exprs, local_sym_tab, struct_sym_tab):
@@ -208,11 +220,12 @@ def _prepare_expr_args(expr, func, module, builder, local_sym_tab, struct_sym_ta
     """Evaluate and prepare an expression to use as an arg for bpf_printk."""
 
     # Special case: struct field char array needs pointer to first element
-    char_array_ptr = _get_struct_char_array_ptr(
-        expr, builder, local_sym_tab, struct_sym_tab
-    )
-    if char_array_ptr:
-        return char_array_ptr
+    if isinstance(expr, ast.Attribute):
+        char_array_ptr, _ = get_char_array_ptr_and_size(
+            expr, builder, local_sym_tab, struct_sym_tab, func
+        )
+        if char_array_ptr:
+            return char_array_ptr
 
     # Regular expression evaluation
     val, _ = eval_expr(func, module, builder, expr, local_sym_tab, None, struct_sym_tab)
@@ -231,52 +244,6 @@ def _prepare_expr_args(expr, func, module, builder, local_sym_tab, struct_sym_ta
         return ir.Constant(ir.IntType(64), 0)
 
 
-def _get_struct_char_array_ptr(expr, builder, local_sym_tab, struct_sym_tab):
-    """Get pointer to first element of char array in struct field, or None."""
-    if not (isinstance(expr, ast.Attribute) and isinstance(expr.value, ast.Name)):
-        return None
-
-    var_name = expr.value.id
-    field_name = expr.attr
-
-    # Check if it's a valid struct field
-    if not (
-        local_sym_tab
-        and var_name in local_sym_tab
-        and struct_sym_tab
-        and local_sym_tab[var_name].metadata in struct_sym_tab
-    ):
-        return None
-
-    struct_type = local_sym_tab[var_name].metadata
-    struct_info = struct_sym_tab[struct_type]
-
-    if field_name not in struct_info.fields:
-        return None
-
-    field_type = struct_info.field_type(field_name)
-
-    # Check if it's a char array
-    is_char_array = (
-        isinstance(field_type, ir.ArrayType)
-        and isinstance(field_type.element, ir.IntType)
-        and field_type.element.width == 8
-    )
-
-    if not is_char_array:
-        return None
-
-    # Get field pointer and GEP to first element: [N x i8]* -> i8*
-    struct_ptr = local_sym_tab[var_name].var
-    field_ptr = struct_info.gep(builder, struct_ptr, field_name)
-
-    return builder.gep(
-        field_ptr,
-        [ir.Constant(ir.IntType(32), 0), ir.Constant(ir.IntType(32), 0)],
-        inbounds=True,
-    )
-
-
 def _handle_pointer_arg(val, func, builder):
     """Convert pointer type for bpf_printk."""
     target, depth = get_base_type_and_depth(val.type)

pythonbpf/local_symbol.py

@@ -0,0 +1,15 @@
+import llvmlite.ir as ir
+from dataclasses import dataclass
+from typing import Any
+
+
+@dataclass
+class LocalSymbol:
+    var: ir.AllocaInstr
+    ir_type: ir.Type
+    metadata: Any = None
+
+    def __iter__(self):
+        yield self.var
+        yield self.ir_type
+        yield self.metadata

pythonbpf/maps/__init__.py

@@ -1,4 +1,5 @@
-from .maps import HashMap, PerfEventArray, RingBuf
+from .maps import HashMap, PerfEventArray, RingBuffer
 from .maps_pass import maps_proc
+from .map_types import BPFMapType
 
-__all__ = ["HashMap", "PerfEventArray", "maps_proc", "RingBuf"]
+__all__ = ["HashMap", "PerfEventArray", "maps_proc", "RingBuffer", "BPFMapType"]

pythonbpf/maps/map_debug_info.py

@@ -1,22 +1,31 @@
+import logging
+from llvmlite import ir
 from pythonbpf.debuginfo import DebugInfoGenerator
 from .map_types import BPFMapType
 
+logger: logging.Logger = logging.getLogger(__name__)
 
-def create_map_debug_info(module, map_global, map_name, map_params):
+
+def create_map_debug_info(module, map_global, map_name, map_params, structs_sym_tab):
     """Generate debug info metadata for BPF maps HASH and PERF_EVENT_ARRAY"""
     generator = DebugInfoGenerator(module)
-
+    logger.info(f"Creating debug info for map {map_name} with params {map_params}")
     uint_type = generator.get_uint32_type()
-    ulong_type = generator.get_uint64_type()
     array_type = generator.create_array_type(
         uint_type, map_params.get("type", BPFMapType.UNSPEC).value
     )
     type_ptr = generator.create_pointer_type(array_type, 64)
     key_ptr = generator.create_pointer_type(
-        array_type if "key_size" in map_params else ulong_type, 64
+        array_type
+        if "key_size" in map_params
+        else _get_key_val_dbg_type(map_params.get("key"), generator, structs_sym_tab),
+        64,
     )
     value_ptr = generator.create_pointer_type(
-        array_type if "value_size" in map_params else ulong_type, 64
+        array_type
+        if "value_size" in map_params
+        else _get_key_val_dbg_type(map_params.get("value"), generator, structs_sym_tab),
+        64,
     )
 
     elements_arr = []
@@ -64,7 +73,13 @@ def create_map_debug_info(module, map_global, map_name, map_params):
     return global_var
 
 
-def create_ringbuf_debug_info(module, map_global, map_name, map_params):
+# TODO: This should not be exposed outside of the module.
+# Ideally we should expose a single create_map_debug_info function that handles all map types.
+# We can probably use a registry pattern to register different map types and their debug info generators.
+# map_params["type"] will be used to determine which generator to use.
+def create_ringbuf_debug_info(
+    module, map_global, map_name, map_params, structs_sym_tab
+):
     """Generate debug information metadata for BPF RINGBUF map"""
     generator = DebugInfoGenerator(module)
 
@@ -91,3 +106,66 @@ def create_ringbuf_debug_info(module, map_global, map_name, map_params):
     )
     map_global.set_metadata("dbg", global_var)
     return global_var
+
+
+def _get_key_val_dbg_type(name, generator, structs_sym_tab):
+    """Get the debug type for key/value based on type object"""
+
+    if not name:
+        logger.warn("No name provided for key/value type, defaulting to uint64")
+        return generator.get_uint64_type()
+
+    type_obj = structs_sym_tab.get(name)
+    if type_obj:
+        logger.info(f"Found struct named {name}, generating debug type")
+        return _get_struct_debug_type(type_obj, generator, structs_sym_tab)
+
+    # Fallback to basic types
+    logger.info(f"No struct named {name}, falling back to basic type")
+
+    # NOTE: Only handling int and long for now
+    if name in ["c_int32", "c_uint32"]:
+        return generator.get_uint32_type()
+
+    # Default fallback for now
+    return generator.get_uint64_type()
+
+
+def _get_struct_debug_type(struct_obj, generator, structs_sym_tab):
+    """Recursively create debug type for struct"""
+    elements_arr = []
+    for fld in struct_obj.fields.keys():
+        fld_type = struct_obj.field_type(fld)
+        if isinstance(fld_type, ir.IntType):
+            if fld_type.width == 32:
+                fld_dbg_type = generator.get_uint32_type()
+            else:
+                # NOTE: Assuming 64-bit for all other int types
+                fld_dbg_type = generator.get_uint64_type()
+        elif isinstance(fld_type, ir.ArrayType):
+            # NOTE: Array types have u8 elements only for now
+            # Debug info generation should fail for other types
+            elem_type = fld_type.element
+            if isinstance(elem_type, ir.IntType) and elem_type.width == 8:
+                char_type = generator.get_uint8_type()
+                fld_dbg_type = generator.create_array_type(char_type, fld_type.count)
+            else:
+                logger.warning(
+                    f"Array element type {str(elem_type)} not supported for debug info, skipping"
+                )
+                continue
+        else:
+            # NOTE: Only handling int and char arrays for now
+            logger.warning(
+                f"Field type {str(fld_type)} not supported for debug info, skipping"
+            )
+            continue
+
+        member = generator.create_struct_member(
+            fld, fld_dbg_type, struct_obj.field_size(fld)
+        )
+        elements_arr.append(member)
+    struct_type = generator.create_struct_type(
+        elements_arr, struct_obj.size * 8, is_distinct=True
+    )
+    return struct_type

pythonbpf/maps/maps.py

@@ -36,11 +36,14 @@ class PerfEventArray:
         pass  # Placeholder for output method
 
 
-class RingBuf:
+class RingBuffer:
     def __init__(self, max_entries):
         self.max_entries = max_entries
 
-    def reserve(self, size: int, flags=0):
+    def output(self, data, flags=0):
+        pass
+
+    def reserve(self, size: int):
         if size > self.max_entries:
             raise ValueError("size cannot be greater than set maximum entries")
         return 0
@@ -48,4 +51,7 @@ class RingBuf:
     def submit(self, data, flags=0):
         pass
 
+    def discard(self, data, flags=0):
+        pass
+
     # add discard, output and also give names to flags and stuff

pythonbpf/maps/maps_pass.py

@@ -3,20 +3,24 @@ import logging
 from logging import Logger
 from llvmlite import ir
 
-from .maps_utils import MapProcessorRegistry
+from .maps_utils import MapProcessorRegistry, MapSymbol
 from .map_types import BPFMapType
 from .map_debug_info import create_map_debug_info, create_ringbuf_debug_info
+from pythonbpf.expr.vmlinux_registry import VmlinuxHandlerRegistry
+
 
 logger: Logger = logging.getLogger(__name__)
 
 
-def maps_proc(tree, module, chunks):
+def maps_proc(tree, module, chunks, structs_sym_tab):
     """Process all functions decorated with @map to find BPF maps"""
     map_sym_tab = {}
     for func_node in chunks:
         if is_map(func_node):
             logger.info(f"Found BPF map: {func_node.name}")
-            map_sym_tab[func_node.name] = process_bpf_map(func_node, module)
+            map_sym_tab[func_node.name] = process_bpf_map(
+                func_node, module, structs_sym_tab
+            )
     return map_sym_tab
 
 
@@ -44,50 +48,71 @@ def create_bpf_map(module, map_name, map_params):
     map_global.align = 8
 
     logger.info(f"Created BPF map: {map_name} with params {map_params}")
-    return map_global
+    return MapSymbol(type=map_params["type"], sym=map_global, params=map_params)
 
 
 def _parse_map_params(rval, expected_args=None):
     """Parse map parameters from call arguments and keywords."""
 
     params = {}
-
+    handler = VmlinuxHandlerRegistry.get_handler()
     # Parse positional arguments
     if expected_args:
         for i, arg_name in enumerate(expected_args):
             if i < len(rval.args):
                 arg = rval.args[i]
                 if isinstance(arg, ast.Name):
-                    params[arg_name] = arg.id
+                    result = _get_vmlinux_enum(handler, arg.id)
+                    params[arg_name] = result if result is not None else arg.id
                 elif isinstance(arg, ast.Constant):
                     params[arg_name] = arg.value
 
     # Parse keyword arguments (override positional)
     for keyword in rval.keywords:
         if isinstance(keyword.value, ast.Name):
-            params[keyword.arg] = keyword.value.id
+            name = keyword.value.id
+            result = _get_vmlinux_enum(handler, name)
+            params[keyword.arg] = result if result is not None else name
         elif isinstance(keyword.value, ast.Constant):
             params[keyword.arg] = keyword.value.value
 
     return params
 
 
-@MapProcessorRegistry.register("RingBuf")
-def process_ringbuf_map(map_name, rval, module):
+def _get_vmlinux_enum(handler, name):
+    if handler and handler.is_vmlinux_enum(name):
+        return handler.get_vmlinux_enum_value(name)
+
+
+@MapProcessorRegistry.register("RingBuffer")
+def process_ringbuf_map(map_name, rval, module, structs_sym_tab):
     """Process a BPF_RINGBUF map declaration"""
     logger.info(f"Processing Ringbuf: {map_name}")
     map_params = _parse_map_params(rval, expected_args=["max_entries"])
     map_params["type"] = BPFMapType.RINGBUF
 
+    # NOTE: constraints borrowed from https://docs.ebpf.io/linux/map-type/BPF_MAP_TYPE_RINGBUF/
+    max_entries = map_params.get("max_entries")
+    if (
+        not isinstance(max_entries, int)
+        or max_entries < 4096
+        or (max_entries & (max_entries - 1)) != 0
+    ):
+        raise ValueError(
+            "Ringbuf max_entries must be a power of two greater than or equal to the page size (4096)"
+        )
+
     logger.info(f"Ringbuf map parameters: {map_params}")
 
     map_global = create_bpf_map(module, map_name, map_params)
-    create_ringbuf_debug_info(module, map_global, map_name, map_params)
+    create_ringbuf_debug_info(
+        module, map_global.sym, map_name, map_params, structs_sym_tab
+    )
     return map_global
 
 
 @MapProcessorRegistry.register("HashMap")
-def process_hash_map(map_name, rval, module):
+def process_hash_map(map_name, rval, module, structs_sym_tab):
     """Process a BPF_HASH map declaration"""
     logger.info(f"Processing HashMap: {map_name}")
     map_params = _parse_map_params(rval, expected_args=["key", "value", "max_entries"])
@@ -96,12 +121,12 @@ def process_hash_map(map_name, rval, module):
     logger.info(f"Map parameters: {map_params}")
     map_global = create_bpf_map(module, map_name, map_params)
     # Generate debug info for BTF
-    create_map_debug_info(module, map_global, map_name, map_params)
+    create_map_debug_info(module, map_global.sym, map_name, map_params, structs_sym_tab)
     return map_global
 
 
 @MapProcessorRegistry.register("PerfEventArray")
-def process_perf_event_map(map_name, rval, module):
+def process_perf_event_map(map_name, rval, module, structs_sym_tab):
     """Process a BPF_PERF_EVENT_ARRAY map declaration"""
     logger.info(f"Processing PerfEventArray: {map_name}")
     map_params = _parse_map_params(rval, expected_args=["key_size", "value_size"])
@@ -110,11 +135,11 @@ def process_perf_event_map(map_name, rval, module):
     logger.info(f"Map parameters: {map_params}")
     map_global = create_bpf_map(module, map_name, map_params)
     # Generate debug info for BTF
-    create_map_debug_info(module, map_global, map_name, map_params)
+    create_map_debug_info(module, map_global.sym, map_name, map_params, structs_sym_tab)
     return map_global
 
 
-def process_bpf_map(func_node, module):
+def process_bpf_map(func_node, module, structs_sym_tab):
     """Process a BPF map (a function decorated with @map)"""
     map_name = func_node.name
     logger.info(f"Processing BPF map: {map_name}")
@@ -133,7 +158,7 @@ def process_bpf_map(func_node, module):
     if isinstance(rval, ast.Call) and isinstance(rval.func, ast.Name):
         handler = MapProcessorRegistry.get_processor(rval.func.id)
         if handler:
-            return handler(map_name, rval, module)
+            return handler(map_name, rval, module, structs_sym_tab)
         else:
             logger.warning(f"Unknown map type {rval.func.id}, defaulting to HashMap")
             return process_hash_map(map_name, rval, module)

pythonbpf/maps/maps_utils.py

@@ -1,5 +1,17 @@
 from collections.abc import Callable
+from dataclasses import dataclass
+from llvmlite import ir
 from typing import Any
+from .map_types import BPFMapType
+
+
+@dataclass
+class MapSymbol:
+    """Class representing a symbol on the map"""
+
+    type: BPFMapType
+    sym: ir.GlobalVariable
+    params: dict[str, Any] | None = None
 
 
 class MapProcessorRegistry:

pythonbpf/type_deducer.py

@@ -13,6 +13,15 @@ mapping = {
     "c_float": ir.FloatType(),
     "c_double": ir.DoubleType(),
     "c_void_p": ir.IntType(64),
+    "c_long": ir.IntType(64),
+    "c_ulong": ir.IntType(64),
+    "c_longlong": ir.IntType(64),
+    "c_uint": ir.IntType(32),
+    "c_int": ir.IntType(32),
+    "c_ushort": ir.IntType(16),
+    "c_short": ir.IntType(16),
+    "c_ubyte": ir.IntType(8),
+    "c_byte": ir.IntType(8),
     # Not so sure about this one
     "str": ir.PointerType(ir.IntType(8)),
 }

pythonbpf/utils.py

@@ -7,6 +7,8 @@ def trace_pipe():
         subprocess.run(["cat", "/sys/kernel/tracing/trace_pipe"])
     except KeyboardInterrupt:
         print("Tracing stopped.")
+    except (FileNotFoundError, PermissionError) as e:
+        print(f"Error accessing trace_pipe: {e}. Try running as root.")
 
 
 def trace_fields():

pythonbpf/vmlinux_parser/assignment_info.py

@@ -0,0 +1,36 @@
+from enum import Enum, auto
+from typing import Any, Dict, List, Optional
+from dataclasses import dataclass
+import llvmlite.ir as ir
+
+from pythonbpf.vmlinux_parser.dependency_node import Field
+
+
+class AssignmentType(Enum):
+    CONSTANT = auto()
+    STRUCT = auto()
+    ARRAY = auto()  # probably won't be used
+    FUNCTION_POINTER = auto()
+    POINTER = auto()  # again, probably won't be used
+
+
+@dataclass
+class FunctionSignature:
+    return_type: str
+    param_types: List[str]
+    varargs: bool
+
+
+# Thew name of the assignment will be in the dict that uses this class
+@dataclass
+class AssignmentInfo:
+    value_type: AssignmentType
+    python_type: type
+    value: Optional[Any]
+    pointer_level: Optional[int]
+    signature: Optional[FunctionSignature]  # For function pointers
+    # The key of the dict is the name of the field.
+    #   Value is a tuple that contains the global variable representing that field
+    #   along with all the information about that field as a Field type.
+    members: Optional[Dict[str, tuple[ir.GlobalVariable, Field]]]  # For structs.
+    debug_info: Any

pythonbpf/vmlinux_parser/class_handler.py

@@ -1,6 +1,7 @@
 import logging
 from functools import lru_cache
 import importlib
+
 from .dependency_handler import DependencyHandler
 from .dependency_node import DependencyNode
 import ctypes
@@ -15,7 +16,38 @@ def get_module_symbols(module_name: str):
     return [name for name in dir(imported_module)], imported_module
 
 
-def process_vmlinux_class(node, llvm_module, handler: DependencyHandler):
+def unwrap_pointer_type(type_obj: Any) -> Any:
+    """
+    Recursively unwrap all pointer layers to get the base type.
+
+    This handles multiply nested pointers like LP_LP_struct_attribute_group
+    and returns the base type (struct_attribute_group).
+
+    Stops unwrapping when reaching a non-pointer type (one without _type_ attribute).
+
+    Args:
+        type_obj: The type object to unwrap
+
+    Returns:
+        The base type after unwrapping all pointer layers
+    """
+    current_type = type_obj
+    # Keep unwrapping while it's a pointer/array type (has _type_)
+    # But stop if _type_ is just a string or basic type marker
+    while hasattr(current_type, "_type_"):
+        next_type = current_type._type_
+        # Stop if _type_ is a string (like 'c' for c_char)
+        if isinstance(next_type, str):
+            break
+        current_type = next_type
+    return current_type
+
+
+def process_vmlinux_class(
+    node,
+    llvm_module,
+    handler: DependencyHandler,
+):
     symbols_in_module, imported_module = get_module_symbols("vmlinux")
     if node.name in symbols_in_module:
         vmlinux_type = getattr(imported_module, node.name)
@@ -25,7 +57,10 @@ def process_vmlinux_class(node, llvm_module, handler: DependencyHandler):
 
 
 def process_vmlinux_post_ast(
-    elem_type_class, llvm_handler, handler: DependencyHandler, processing_stack=None
+    elem_type_class,
+    llvm_handler,
+    handler: DependencyHandler,
+    processing_stack=None,
 ):
     # Initialize processing stack on first call
     if processing_stack is None:
@@ -46,7 +81,7 @@ def process_vmlinux_post_ast(
         logger.debug(f"Node {current_symbol_name} already processed and ready")
         return True
 
-    # XXX:Check it's use. It's probably not being used.
+    # XXX:Check its use. It's probably not being used.
     if current_symbol_name in processing_stack:
         logger.debug(
             f"Dependency already in processing stack for {current_symbol_name}, skipping"
@@ -60,6 +95,10 @@ def process_vmlinux_post_ast(
             pass
         else:
             new_dep_node = DependencyNode(name=current_symbol_name)
+
+            # elem_type_class is the actual vmlinux struct/class
+            new_dep_node.set_ctype_struct(elem_type_class)
+
             handler.add_node(new_dep_node)
             class_obj = getattr(imported_module, current_symbol_name)
             # Inspect the class fields
@@ -94,12 +133,47 @@ def process_vmlinux_post_ast(
                 [elem_type, elem_bitfield_size] = elem_temp_list
                 local_module_name = getattr(elem_type, "__module__", None)
                 new_dep_node.add_field(elem_name, elem_type, ready=False)
+
                 if local_module_name == ctypes.__name__:
+                    # TODO: need to process pointer to ctype and also CFUNCTYPES here recursively. Current processing is a single dereference
                     new_dep_node.set_field_bitfield_size(elem_name, elem_bitfield_size)
-                    new_dep_node.set_field_ready(elem_name, is_ready=True)
-                    logger.debug(
-                        f"Field {elem_name} is direct ctypes type: {elem_type}"
-                    )
+
+                    # Process pointer to ctype
+                    if isinstance(elem_type, type) and issubclass(
+                        elem_type, ctypes._Pointer
+                    ):
+                        # Get the pointed-to type
+                        pointed_type = elem_type._type_
+                        logger.debug(f"Found pointer to type: {pointed_type}")
+                        new_dep_node.set_field_containing_type(elem_name, pointed_type)
+                        new_dep_node.set_field_ctype_complex_type(
+                            elem_name, ctypes._Pointer
+                        )
+                        new_dep_node.set_field_ready(elem_name, is_ready=True)
+
+                    # Process function pointers (CFUNCTYPE)
+                    elif hasattr(elem_type, "_restype_") and hasattr(
+                        elem_type, "_argtypes_"
+                    ):
+                        # This is a CFUNCTYPE or similar
+                        logger.info(
+                            f"Function pointer detected for {elem_name} with return type {elem_type._restype_} and arguments {elem_type._argtypes_}"
+                        )
+                        # Set the field as ready but mark it with special handling
+                        new_dep_node.set_field_ctype_complex_type(
+                            elem_name, ctypes.CFUNCTYPE
+                        )
+                        new_dep_node.set_field_ready(elem_name, is_ready=True)
+                        logger.warning(
+                            "Blindly processing CFUNCTYPE ctypes to ensure compilation. Unsupported"
+                        )
+
+                    else:
+                        # Regular ctype
+                        new_dep_node.set_field_ready(elem_name, is_ready=True)
+                        logger.debug(
+                            f"Field {elem_name} is direct ctypes type: {elem_type}"
+                        )
                 elif local_module_name == "vmlinux":
                     new_dep_node.set_field_bitfield_size(elem_name, elem_bitfield_size)
                     logger.debug(
@@ -111,57 +185,141 @@ def process_vmlinux_post_ast(
                         if hasattr(elem_type, "_length_") and is_complex_type:
                             type_length = elem_type._length_
 
-                        if containing_type.__module__ == "vmlinux":
-                            pass
-                        elif containing_type.__module__ == ctypes.__name__:
+                        # Unwrap all pointer layers to get the base type for dependency tracking
+                        base_type = unwrap_pointer_type(elem_type)
+                        base_type_module = getattr(base_type, "__module__", None)
+
+                        if base_type_module == "vmlinux":
+                            base_type_name = (
+                                base_type.__name__
+                                if hasattr(base_type, "__name__")
+                                else str(base_type)
+                            )
+                            # ONLY add vmlinux types as dependencies
+                            new_dep_node.add_dependent(base_type_name)
+
+                            logger.debug(
+                                f"{containing_type} containing type of parent {elem_name} with {elem_type} and ctype {ctype_complex_type} and length {type_length}"
+                            )
+                            new_dep_node.set_field_containing_type(
+                                elem_name, containing_type
+                            )
+                            new_dep_node.set_field_type_size(elem_name, type_length)
+                            new_dep_node.set_field_ctype_complex_type(
+                                elem_name, ctype_complex_type
+                            )
+                            new_dep_node.set_field_type(elem_name, elem_type)
+
+                            # Check the containing_type module to decide whether to recurse
+                            containing_type_module = getattr(
+                                containing_type, "__module__", None
+                            )
+                            if containing_type_module == "vmlinux":
+                                # Also unwrap containing_type to get base type name
+                                base_containing_type = unwrap_pointer_type(
+                                    containing_type
+                                )
+                                containing_type_name = (
+                                    base_containing_type.__name__
+                                    if hasattr(base_containing_type, "__name__")
+                                    else str(base_containing_type)
+                                )
+
+                                # Check for self-reference or already processed
+                                if containing_type_name == current_symbol_name:
+                                    # Self-referential pointer
+                                    logger.debug(
+                                        f"Self-referential pointer in {current_symbol_name}.{elem_name}"
+                                    )
+                                    new_dep_node.set_field_ready(elem_name, True)
+                                elif handler.has_node(containing_type_name):
+                                    # Already processed
+                                    logger.debug(
+                                        f"Reusing already processed {containing_type_name}"
+                                    )
+                                    new_dep_node.set_field_ready(elem_name, True)
+                                else:
+                                    # Process recursively - use base containing type, not the pointer wrapper
+                                    new_dep_node.add_dependent(containing_type_name)
+                                    process_vmlinux_post_ast(
+                                        base_containing_type,
+                                        llvm_handler,
+                                        handler,
+                                        processing_stack,
+                                    )
+                                    new_dep_node.set_field_ready(elem_name, True)
+                            elif (
+                                containing_type_module == ctypes.__name__
+                                or containing_type_module is None
+                            ):
+                                logger.debug(
+                                    f"Processing ctype internal{containing_type}"
+                                )
+                                new_dep_node.set_field_ready(elem_name, True)
+                            else:
+                                raise TypeError(
+                                    f"Module not supported in recursive resolution: {containing_type_module}"
+                                )
+                        elif (
+                            base_type_module == ctypes.__name__
+                            or base_type_module is None
+                        ):
+                            # Handle ctypes or types with no module (like some internal ctypes types)
+                            # DO NOT add ctypes as dependencies - just set field metadata and mark ready
+                            logger.debug(
+                                f"Base type {base_type} is ctypes - NOT adding as dependency, just processing field"
+                            )
                             if isinstance(elem_type, type):
                                 if issubclass(elem_type, ctypes.Array):
                                     ctype_complex_type = ctypes.Array
                                 elif issubclass(elem_type, ctypes._Pointer):
                                     ctype_complex_type = ctypes._Pointer
+                                else:
+                                    raise ImportError(
+                                        "Non Array and Pointer type ctype imports not supported in current version"
+                                    )
                             else:
                                 raise TypeError("Unsupported ctypes subclass")
+
+                            # Set field metadata but DO NOT add dependency or recurse
+                            new_dep_node.set_field_containing_type(
+                                elem_name, containing_type
+                            )
+                            new_dep_node.set_field_type_size(elem_name, type_length)
+                            new_dep_node.set_field_ctype_complex_type(
+                                elem_name, ctype_complex_type
+                            )
+                            new_dep_node.set_field_type(elem_name, elem_type)
+                            new_dep_node.set_field_ready(elem_name, True)
                         else:
                             raise ImportError(
-                                f"Unsupported module of {containing_type}"
-                            )
-                        logger.debug(
-                            f"{containing_type} containing type of parent {elem_name} with {elem_type} and ctype {ctype_complex_type} and length {type_length}"
-                        )
-                        new_dep_node.set_field_containing_type(
-                            elem_name, containing_type
-                        )
-                        new_dep_node.set_field_type_size(elem_name, type_length)
-                        new_dep_node.set_field_ctype_complex_type(
-                            elem_name, ctype_complex_type
-                        )
-                        new_dep_node.set_field_type(elem_name, elem_type)
-                        if containing_type.__module__ == "vmlinux":
-                            process_vmlinux_post_ast(
-                                containing_type, llvm_handler, handler, processing_stack
-                            )
-                            new_dep_node.set_field_ready(elem_name, True)
-                        elif containing_type.__module__ == ctypes.__name__:
-                            logger.debug(f"Processing ctype internal{containing_type}")
-                            new_dep_node.set_field_ready(elem_name, True)
-                        else:
-                            raise TypeError(
-                                "Module not supported in recursive resolution"
+                                f"Unsupported module of {base_type}: {base_type_module}"
                             )
                     else:
+                        new_dep_node.add_dependent(
+                            elem_type.__name__
+                            if hasattr(elem_type, "__name__")
+                            else str(elem_type)
+                        )
                         process_vmlinux_post_ast(
-                            elem_type, llvm_handler, handler, processing_stack
+                            elem_type,
+                            llvm_handler,
+                            handler,
+                            processing_stack,
                         )
                         new_dep_node.set_field_ready(elem_name, True)
                 else:
                     raise ValueError(
                         f"{elem_name} with type {elem_type} from module {module_name} not supported in recursive resolver"
                     )
-
+    elif module_name == ctypes.__name__ or module_name is None:
+        # Handle ctypes types - these don't need processing, just return
+        logger.debug(f"Skipping ctypes type {current_symbol_name}")
+        return True
     else:
-        raise ImportError("UNSUPPORTED Module")
+        raise ImportError(f"UNSUPPORTED Module {module_name}")
 
-    logging.info(
+    logger.info(
         f"{current_symbol_name} processed and handler readiness {handler.is_ready}"
     )
     return True

pythonbpf/vmlinux_parser/dependency_handler.py

@@ -147,3 +147,27 @@ class DependencyHandler:
             int: The number of nodes
         """
         return len(self._nodes)
+
+    def __getitem__(self, name: str) -> DependencyNode:
+        """
+        Get a node by name using dictionary-style access.
+
+        Args:
+            name: The name of the node to retrieve
+
+        Returns:
+            DependencyNode: The node with the given name
+
+        Raises:
+            KeyError: If no node with the given name exists
+
+        Example:
+            node = handler["some-dep_node_name"]
+        """
+        if name not in self._nodes:
+            raise KeyError(f"No node with name '{name}' found")
+        return self._nodes[name]
+
+    @property
+    def nodes(self):
+        return self._nodes

pythonbpf/vmlinux_parser/dependency_node.py

@@ -1,5 +1,6 @@
 from dataclasses import dataclass, field
 from typing import Dict, Any, Optional
+import ctypes
 
 
 # TODO: FIX THE FUCKING TYPE NAME CONVENTION.
@@ -13,9 +14,35 @@ class Field:
     containing_type: Optional[Any]
     type_size: Optional[int]
     bitfield_size: Optional[int]
+    offset: int
     value: Any = None
     ready: bool = False
 
+    def __hash__(self):
+        """
+        Create a hash based on the immutable attributes that define this field's identity.
+        This allows Field objects to be used as dictionary keys.
+        """
+        # Use a tuple of the fields that uniquely identify this field
+        identity = (
+            self.name,
+            id(self.type),  # Use id for non-hashable types
+            id(self.ctype_complex_type) if self.ctype_complex_type else None,
+            id(self.containing_type) if self.containing_type else None,
+            self.type_size,
+            self.bitfield_size,
+            self.offset,
+            self.value if self.value else None,
+        )
+        return hash(identity)
+
+    def __eq__(self, other):
+        """
+        Define equality consistent with the hash function.
+        Two fields are equal if they have they are the same
+        """
+        return self is other
+
     def set_ready(self, is_ready: bool = True) -> None:
         """Set the readiness state of this field."""
         self.ready = is_ready
@@ -60,6 +87,10 @@ class Field:
         if mark_ready:
             self.ready = True
 
+    def set_offset(self, offset: int) -> None:
+        """Set the offset of this field"""
+        self.offset = offset
+
 
 @dataclass
 class DependencyNode:
@@ -106,8 +137,11 @@ class DependencyNode:
     """
 
     name: str
+    depends_on: Optional[list[str]] = None
     fields: Dict[str, Field] = field(default_factory=dict)
     _ready_cache: Optional[bool] = field(default=None, repr=False)
+    current_offset: int = 0
+    ctype_struct: Optional[Any] = field(default=None, repr=False)
 
     def add_field(
         self,
@@ -119,8 +153,11 @@ class DependencyNode:
         ctype_complex_type: Optional[int] = None,
         bitfield_size: Optional[int] = None,
         ready: bool = False,
+        offset: int = 0,
     ) -> None:
         """Add a field to the node with an optional initial value and readiness state."""
+        if self.depends_on is None:
+            self.depends_on = []
         self.fields[name] = Field(
             name=name,
             type=field_type,
@@ -130,10 +167,21 @@ class DependencyNode:
             type_size=type_size,
             ctype_complex_type=ctype_complex_type,
             bitfield_size=bitfield_size,
+            offset=offset,
         )
         # Invalidate readiness cache
         self._ready_cache = None
 
+    def set_ctype_struct(self, ctype_struct: Any) -> None:
+        """Set the ctypes structure for automatic offset calculation."""
+        self.ctype_struct = ctype_struct
+
+    def __sizeof__(self):
+        # If we have a ctype_struct, use its size
+        if self.ctype_struct is not None:
+            return ctypes.sizeof(self.ctype_struct)
+        return self.current_offset
+
     def get_field(self, name: str) -> Field:
         """Get a field by name."""
         return self.fields[name]
@@ -200,15 +248,112 @@ class DependencyNode:
         # Invalidate readiness cache
         self._ready_cache = None
 
-    def set_field_ready(self, name: str, is_ready: bool = False) -> None:
+    def set_field_ready(
+        self,
+        name: str,
+        is_ready: bool = False,
+        size_of_containing_type: Optional[int] = None,
+    ) -> None:
         """Mark a field as ready or not ready."""
         if name not in self.fields:
             raise KeyError(f"Field '{name}' does not exist in node '{self.name}'")
 
         self.fields[name].set_ready(is_ready)
+
+        # Use ctypes built-in offset if available
+        if self.ctype_struct is not None:
+            try:
+                self.fields[name].set_offset(getattr(self.ctype_struct, name).offset)
+            except AttributeError:
+                # Fallback to manual calculation if field not found in ctype_struct
+                self.fields[name].set_offset(self.current_offset)
+                self.current_offset += self._calculate_size(
+                    name, size_of_containing_type
+                )
+        else:
+            # Manual offset calculation when no ctype_struct is available
+            self.fields[name].set_offset(self.current_offset)
+            self.current_offset += self._calculate_size(name, size_of_containing_type)
+
         # Invalidate readiness cache
         self._ready_cache = None
 
+    def _calculate_size(
+        self, name: str, size_of_containing_type: Optional[int] = None
+    ) -> int:
+        processing_field = self.fields[name]
+        # size_of_field will be in bytes
+        if processing_field.type.__module__ == ctypes.__name__:
+            size_of_field = ctypes.sizeof(processing_field.type)
+            return size_of_field
+        elif processing_field.type.__module__ == "vmlinux":
+            if processing_field.ctype_complex_type is not None:
+                if issubclass(processing_field.ctype_complex_type, ctypes.Array):
+                    if processing_field.containing_type.__module__ == ctypes.__name__:
+                        if (
+                            processing_field.containing_type is not None
+                            and processing_field.type_size is not None
+                        ):
+                            size_of_field = (
+                                ctypes.sizeof(processing_field.containing_type)
+                                * processing_field.type_size
+                            )
+                        else:
+                            raise RuntimeError(
+                                f"{processing_field} has no containing_type or type_size"
+                            )
+                        return size_of_field
+                    elif processing_field.containing_type.__module__ == "vmlinux":
+                        if (
+                            size_of_containing_type is not None
+                            and processing_field.type_size is not None
+                        ):
+                            size_of_field = (
+                                size_of_containing_type * processing_field.type_size
+                            )
+                        else:
+                            raise RuntimeError(
+                                f"{processing_field} has no containing_type or type_size"
+                            )
+                        return size_of_field
+                elif issubclass(processing_field.ctype_complex_type, ctypes._Pointer):
+                    return ctypes.sizeof(ctypes.c_void_p)
+                else:
+                    raise NotImplementedError(
+                        "This subclass of ctype not supported yet"
+                    )
+            elif processing_field.type_size is not None:
+                # Handle vmlinux types with type_size but no ctype_complex_type
+                # This means it's a direct vmlinux struct field (not array/pointer wrapped)
+                # The type_size should already contain the full size of the struct
+                # But if there's a containing_type from vmlinux, we need that size
+                if processing_field.containing_type is not None:
+                    if processing_field.containing_type.__module__ == "vmlinux":
+                        # For vmlinux containing types, we need the pre-calculated size
+                        if size_of_containing_type is not None:
+                            return size_of_containing_type * processing_field.type_size
+                        else:
+                            raise RuntimeError(
+                                f"Field {name}: vmlinux containing_type requires size_of_containing_type"
+                            )
+                    else:
+                        raise ModuleNotFoundError(
+                            f"Containing type module {processing_field.containing_type.__module__} not supported"
+                        )
+                else:
+                    raise RuntimeError("Wrong type found with no containing type")
+            else:
+                # No ctype_complex_type and no type_size, must rely on size_of_containing_type
+                if size_of_containing_type is None:
+                    raise RuntimeError(
+                        f"Size of containing type {size_of_containing_type} is None"
+                    )
+                return size_of_containing_type
+
+        else:
+            raise ModuleNotFoundError("Module is not supported for the operation")
+        raise RuntimeError("control should not reach here")
+
     @property
     def is_ready(self) -> bool:
         """Check if the node is ready (all fields are ready)."""
@@ -235,3 +380,9 @@ class DependencyNode:
     def get_not_ready_fields(self) -> Dict[str, Field]:
         """Get all fields that are marked as not ready."""
         return {name: elem for name, elem in self.fields.items() if not elem.ready}
+
+    def add_dependent(self, dep_type):
+        if dep_type in self.depends_on:
+            return
+        else:
+            self.depends_on.append(dep_type)

pythonbpf/vmlinux_parser/import_detector.py

@@ -1,17 +1,19 @@
 import ast
 import logging
-from typing import List, Tuple, Dict
 import importlib
 import inspect
 
+from .assignment_info import AssignmentInfo, AssignmentType
 from .dependency_handler import DependencyHandler
-from .ir_generation import IRGenerator
+from .ir_gen import IRGenerator
 from .class_handler import process_vmlinux_class
 
 logger = logging.getLogger(__name__)
 
 
-def detect_import_statement(tree: ast.AST) -> List[Tuple[str, ast.ImportFrom]]:
+def detect_import_statement(
+    tree: ast.AST,
+) -> list[tuple[str, ast.ImportFrom, str, str]]:
     """
     Parse AST and detect import statements from vmlinux.
 
@@ -25,7 +27,7 @@ def detect_import_statement(tree: ast.AST) -> List[Tuple[str, ast.ImportFrom]]:
         List of tuples containing (module_name, imported_item) for each vmlinux import
 
     Raises:
-        SyntaxError: If multiple imports from vmlinux are attempted or import * is used
+        SyntaxError: If import * is used
     """
     vmlinux_imports = []
 
@@ -40,28 +42,19 @@ def detect_import_statement(tree: ast.AST) -> List[Tuple[str, ast.ImportFrom]]:
                         "Please import specific types explicitly."
                     )
 
-                # Check for multiple imports: from vmlinux import A, B, C
-                if len(node.names) > 1:
-                    imported_names = [alias.name for alias in node.names]
-                    raise SyntaxError(
-                        f"Multiple imports from vmlinux are not supported. "
-                        f"Found: {', '.join(imported_names)}. "
-                        f"Please use separate import statements for each type."
-                    )
-
                 # Check if no specific import is specified (should not happen with valid Python)
                 if len(node.names) == 0:
                     raise SyntaxError(
                         "Import from vmlinux must specify at least one type."
                     )
 
-                # Valid single import
+                # Support multiple imports: from vmlinux import A, B, C
                 for alias in node.names:
                     import_name = alias.name
-                    # Use alias if provided, otherwise use the original name (commented)
-                    # as_name = alias.asname if alias.asname else alias.name
-                    vmlinux_imports.append(("vmlinux", node))
-                    logger.info(f"Found vmlinux import: {import_name}")
+                    # Use alias if provided, otherwise use the original name
+                    as_name = alias.asname if alias.asname else alias.name
+                    vmlinux_imports.append(("vmlinux", node, import_name, as_name))
+                    logger.info(f"Found vmlinux import: {import_name} as {as_name}")
 
         # Handle "import vmlinux" statements (not typical but should be rejected)
         elif isinstance(node, ast.Import):
@@ -82,54 +75,79 @@ def vmlinux_proc(tree: ast.AST, module):
     # initialise dependency handler
     handler = DependencyHandler()
     # initialise assignment dictionary of name to type
-    assignments: Dict[str, type] = {}
+    assignments: dict[str, AssignmentInfo] = {}
 
     if not import_statements:
         logger.info("No vmlinux imports found")
-        return
+        return None
 
     # Import vmlinux module directly
     try:
         vmlinux_mod = importlib.import_module("vmlinux")
     except ImportError:
         logger.warning("Could not import vmlinux module")
-        return
+        return None
 
     source_file = inspect.getsourcefile(vmlinux_mod)
     if source_file is None:
         logger.warning("Cannot find source for vmlinux module")
-        return
+        return None
 
     with open(source_file, "r") as f:
         mod_ast = ast.parse(f.read(), filename=source_file)
 
-    for import_mod, import_node in import_statements:
-        for alias in import_node.names:
-            imported_name = alias.name
-            found = False
-            for mod_node in mod_ast.body:
-                if (
-                    isinstance(mod_node, ast.ClassDef)
-                    and mod_node.name == imported_name
-                ):
-                    process_vmlinux_class(mod_node, module, handler)
-                    found = True
-                    break
-                if isinstance(mod_node, ast.Assign):
-                    for target in mod_node.targets:
-                        if isinstance(target, ast.Name) and target.id == imported_name:
-                            process_vmlinux_assign(mod_node, module, assignments)
-                            found = True
-                            break
-                if found:
-                    break
-            if not found:
-                logger.info(
-                    f"{imported_name} not found as ClassDef or Assign in vmlinux"
-                )
+    for import_mod, import_node, imported_name, as_name in import_statements:
+        found = False
+        for mod_node in mod_ast.body:
+            if isinstance(mod_node, ast.ClassDef) and mod_node.name == imported_name:
+                process_vmlinux_class(mod_node, module, handler)
+                found = True
+                break
+            if isinstance(mod_node, ast.Assign):
+                for target in mod_node.targets:
+                    if isinstance(target, ast.Name) and target.id == imported_name:
+                        process_vmlinux_assign(mod_node, module, assignments, as_name)
+                        found = True
+                        break
+            if found:
+                break
+        if not found:
+            logger.info(f"{imported_name} not found as ClassDef or Assign in vmlinux")
 
-    IRGenerator(module, handler)
+    IRGenerator(module, handler, assignments)
+    return assignments
 
 
-def process_vmlinux_assign(node, module, assignments: Dict[str, type]):
-    raise NotImplementedError("Assignment handling has not been implemented yet")
+def process_vmlinux_assign(
+    node, module, assignments: dict[str, AssignmentInfo], target_name=None
+):
+    """Process assignments from vmlinux module."""
+    # Only handle single-target assignments
+    if len(node.targets) == 1 and isinstance(node.targets[0], ast.Name):
+        # Use provided target_name (for aliased imports) or fall back to original name
+        if target_name is None:
+            target_name = node.targets[0].id
+
+        # Handle constant value assignments
+        if isinstance(node.value, ast.Constant):
+            # Fixed: using proper TypedDict creation syntax with named arguments
+            assignments[target_name] = AssignmentInfo(
+                value_type=AssignmentType.CONSTANT,
+                python_type=type(node.value.value),
+                value=node.value.value,
+                pointer_level=None,
+                signature=None,
+                members=None,
+                debug_info=None,
+            )
+            logger.info(
+                f"Added assignment: {target_name} = {node.value.value!r} of type {type(node.value.value)}"
+            )
+
+        # Handle other assignment types that we may need to support
+        else:
+            logger.warning(
+                f"Unsupported assignment type for {target_name}: {ast.dump(node.value)}"
+            )
+    else:
+        raise ValueError("Not a simple assignment")

pythonbpf/vmlinux_parser/ir_gen/__init__.py

@@ -0,0 +1,3 @@
+from .ir_generation import IRGenerator
+
+__all__ = ["IRGenerator"]

pythonbpf/vmlinux_parser/ir_gen/debug_info_gen.py

@@ -0,0 +1,190 @@
+from pythonbpf.debuginfo import DebugInfoGenerator, dwarf_constants as dc
+from ..dependency_node import DependencyNode
+import ctypes
+import logging
+from typing import List, Any, Tuple
+
+logger = logging.getLogger(__name__)
+
+
+def debug_info_generation(
+    struct: DependencyNode,
+    llvm_module,
+    generated_debug_info: List[Tuple[DependencyNode, Any]],
+) -> Any:
+    """
+    Generate DWARF debug information for a struct defined in a DependencyNode.
+
+    Args:
+        struct: The dependency node containing struct information
+        llvm_module: The LLVM module to add debug info to
+        generated_debug_info: List of tuples (struct, debug_info) to track generated debug info
+
+    Returns:
+        The generated global variable debug info, or None for unsupported types
+    """
+    # Set up debug info generator
+    generator = DebugInfoGenerator(llvm_module)
+
+    # Check if debug info for this struct has already been generated
+    for existing_struct, debug_info in generated_debug_info:
+        if existing_struct.name == struct.name:
+            return debug_info
+
+    # Check if this is a union (not supported yet)
+    if not struct.name.startswith("struct_"):
+        logger.warning(f"Skipping debug info generation for union: {struct.name}")
+        # Create a minimal forward declaration for unions
+        union_type = generator.create_struct_type(
+            [], struct.__sizeof__() * 8, is_distinct=True
+        )
+        return union_type
+
+    # Process all fields and create members for the struct
+    members = []
+
+    sorted_fields = sorted(struct.fields.items(), key=lambda item: item[1].offset)
+
+    for field_name, field in sorted_fields:
+        try:
+            # Get appropriate debug type for this field
+            field_type = _get_field_debug_type(
+                field_name, field, generator, struct, generated_debug_info
+            )
+
+            # Ensure field_type is a tuple
+            if not isinstance(field_type, tuple) or len(field_type) != 2:
+                logger.error(f"Invalid field_type for {field_name}: {field_type}")
+                continue
+
+            # Create struct member with proper offset
+            member = generator.create_struct_member_vmlinux(
+                field_name, field_type, field.offset * 8
+            )
+            members.append(member)
+        except Exception as e:
+            logger.error(f"Failed to process field {field_name} in {struct.name}: {e}")
+            continue
+
+    struct_name = struct.name.removeprefix("struct_")
+    # Create struct type with all members
+    struct_type = generator.create_struct_type_with_name(
+        struct_name, members, struct.__sizeof__() * 8, is_distinct=True
+    )
+
+    return struct_type
+
+
+def _get_field_debug_type(
+    field_name: str,
+    field,
+    generator: DebugInfoGenerator,
+    parent_struct: DependencyNode,
+    generated_debug_info: List[Tuple[DependencyNode, Any]],
+) -> tuple[Any, int]:
+    """
+    Determine the appropriate debug type for a field based on its Python/ctypes type.
+
+    Args:
+        field_name: Name of the field
+        field: Field object containing type information
+        generator: DebugInfoGenerator instance
+        parent_struct: The parent struct containing this field
+        generated_debug_info: List of already generated debug info
+
+    Returns:
+        A tuple of (debug_type, size_in_bits)
+    """
+    # Handle complex types (arrays, pointers, function pointers)
+    if field.ctype_complex_type is not None:
+        # Handle function pointer types (CFUNCTYPE)
+        if callable(field.ctype_complex_type):
+            # Function pointers are represented as void pointers
+            logger.warning(
+                f"Field {field_name} is a function pointer, using void pointer"
+            )
+            void_ptr = generator.create_pointer_type(None, 64)
+            return void_ptr, 64
+        elif issubclass(field.ctype_complex_type, ctypes.Array):
+            # Handle array types
+            element_type, base_type_size = _get_basic_debug_type(
+                field.containing_type, generator
+            )
+            return generator.create_array_type_vmlinux(
+                (element_type, base_type_size * field.type_size), field.type_size
+            ), field.type_size * base_type_size
+        elif issubclass(field.ctype_complex_type, ctypes._Pointer):
+            # Handle pointer types
+            pointee_type, _ = _get_basic_debug_type(field.containing_type, generator)
+            return generator.create_pointer_type(pointee_type), 64
+
+    # Handle other vmlinux types (nested structs)
+    if field.type.__module__ == "vmlinux":
+        # If it's a struct from vmlinux, check if we've already generated debug info for it
+        struct_name = field.type.__name__
+
+        # Look for existing debug info in the list
+        for existing_struct, debug_info in generated_debug_info:
+            if existing_struct.name == struct_name:
+                # Use existing debug info
+                return debug_info, existing_struct.__sizeof__() * 8
+
+        # If not found, create a forward declaration
+        # This will be completed when the actual struct is processed
+        logger.info(
+            f"Forward declaration created for {struct_name} in {parent_struct.name}"
+        )
+        forward_type = generator.create_struct_type([], 0, is_distinct=True)
+        return forward_type, 0
+
+    # Handle basic C types
+    return _get_basic_debug_type(field.type, generator)
+
+
+def _get_basic_debug_type(ctype, generator: DebugInfoGenerator) -> Any:
+    """
+    Map a ctypes type to a DWARF debug type.
+
+    Args:
+        ctype: A ctypes type or Python type
+        generator: DebugInfoGenerator instance
+
+    Returns:
+        The corresponding debug type
+    """
+    # Map ctypes to debug info types
+    if ctype == ctypes.c_char or ctype == ctypes.c_byte:
+        return generator.get_basic_type("char", 8, dc.DW_ATE_signed_char), 8
+    elif ctype == ctypes.c_ubyte or ctype == ctypes.c_uint8:
+        return generator.get_basic_type("unsigned char", 8, dc.DW_ATE_unsigned_char), 8
+    elif ctype == ctypes.c_short or ctype == ctypes.c_int16:
+        return generator.get_basic_type("short", 16, dc.DW_ATE_signed), 16
+    elif ctype == ctypes.c_ushort or ctype == ctypes.c_uint16:
+        return generator.get_basic_type("unsigned short", 16, dc.DW_ATE_unsigned), 16
+    elif ctype == ctypes.c_int or ctype == ctypes.c_int32:
+        return generator.get_basic_type("int", 32, dc.DW_ATE_signed), 32
+    elif ctype == ctypes.c_uint or ctype == ctypes.c_uint32:
+        return generator.get_basic_type("unsigned int", 32, dc.DW_ATE_unsigned), 32
+    elif ctype == ctypes.c_long:
+        return generator.get_basic_type("long", 64, dc.DW_ATE_signed), 64
+    elif ctype == ctypes.c_ulong:
+        return generator.get_basic_type("unsigned long", 64, dc.DW_ATE_unsigned), 64
+    elif ctype == ctypes.c_longlong or ctype == ctypes.c_int64:
+        return generator.get_basic_type("long long", 64, dc.DW_ATE_signed), 64
+    elif ctype == ctypes.c_ulonglong or ctype == ctypes.c_uint64:
+        return generator.get_basic_type(
+            "unsigned long long", 64, dc.DW_ATE_unsigned
+        ), 64
+    elif ctype == ctypes.c_float:
+        return generator.get_basic_type("float", 32, dc.DW_ATE_float), 32
+    elif ctype == ctypes.c_double:
+        return generator.get_basic_type("double", 64, dc.DW_ATE_float), 64
+    elif ctype == ctypes.c_bool:
+        return generator.get_basic_type("bool", 8, dc.DW_ATE_boolean), 8
+    elif ctype == ctypes.c_char_p:
+        char_type = generator.get_basic_type("char", 8, dc.DW_ATE_signed_char), 8
+        return generator.create_pointer_type(char_type)
+    elif ctype == ctypes.c_void_p:
+        return generator.create_pointer_type(None), 64
+    else:
+        return generator.get_uint64_type(), 64

pythonbpf/vmlinux_parser/ir_gen/ir_generation.py

@@ -0,0 +1,287 @@
+import ctypes
+import logging
+
+from ..assignment_info import AssignmentInfo, AssignmentType
+from ..dependency_handler import DependencyHandler
+from .debug_info_gen import debug_info_generation
+from ..dependency_node import DependencyNode
+import llvmlite.ir as ir
+
+logger = logging.getLogger(__name__)
+
+
+class IRGenerator:
+    # This field keeps track of the non_struct names to avoid duplicate name errors.
+    type_number = 0
+    unprocessed_store: list[str] = []
+
+    # get the assignments dict and add this stuff to it.
+    def __init__(self, llvm_module, handler: DependencyHandler, assignments):
+        self.llvm_module = llvm_module
+        self.handler: DependencyHandler = handler
+        self.generated: list[str] = []
+        self.generated_debug_info: list = []
+        # Use struct_name and field_name as key instead of Field object
+        self.generated_field_names: dict[str, dict[str, ir.GlobalVariable]] = {}
+        self.assignments: dict[str, AssignmentInfo] = assignments
+        if not handler.is_ready:
+            raise ImportError(
+                "Semantic analysis of vmlinux imports failed. Cannot generate IR"
+            )
+        for struct in handler:
+            self.struct_processor(struct)
+
+    def struct_processor(self, struct, processing_stack=None):
+        # Initialize processing stack on first call
+        if processing_stack is None:
+            processing_stack = set()
+
+        # If already generated, skip
+        if struct.name in self.generated:
+            return
+
+        # Detect circular dependency
+        if struct.name in processing_stack:
+            logger.info(
+                f"Circular dependency detected for {struct.name}, skipping recursive processing"
+            )
+            # For circular dependencies, we can either:
+            # 1. Use forward declarations (opaque pointers)
+            # 2. Mark as incomplete and process later
+            # 3. Generate a placeholder type
+            # Here we'll just skip and let it be processed in its own call
+            return
+
+        logger.info(f"IR generating for {struct.name}")
+
+        # Add to processing stack before processing dependencies
+        processing_stack.add(struct.name)
+
+        try:
+            # Process all dependencies first
+            if struct.depends_on is None:
+                pass
+            else:
+                for dependency in struct.depends_on:
+                    if dependency not in self.generated:
+                        # Check if dependency exists in handler
+                        if dependency in self.handler.nodes:
+                            dep_node_from_dependency = self.handler[dependency]
+                            # Pass the processing_stack down to track circular refs
+                            self.struct_processor(
+                                dep_node_from_dependency, processing_stack
+                            )
+                        else:
+                            raise RuntimeError(
+                                f"Warning: Dependency {dependency} not found in handler"
+                            )
+
+            # Generate IR first to populate field names
+            struct_debug_info = self.gen_ir(struct, self.generated_debug_info)
+            self.generated_debug_info.append((struct, struct_debug_info))
+
+            # Fill the assignments dictionary with struct information
+            if struct.name not in self.assignments:
+                # Create a members dictionary for AssignmentInfo
+                members_dict = {}
+                for field_name, field in struct.fields.items():
+                    # Get the generated field name from our dictionary, or use field_name if not found
+                    if (
+                        struct.name in self.generated_field_names
+                        and field_name in self.generated_field_names[struct.name]
+                    ):
+                        field_global_variable = self.generated_field_names[struct.name][
+                            field_name
+                        ]
+                        members_dict[field_name] = (field_global_variable, field)
+                    else:
+                        raise ValueError(
+                            f"llvm global name not found for struct field {field_name}"
+                        )
+                        # members_dict[field_name] = (field_name, field)
+
+                # Add struct to assignments dictionary
+                self.assignments[struct.name] = AssignmentInfo(
+                    value_type=AssignmentType.STRUCT,
+                    python_type=struct.ctype_struct,
+                    value=None,
+                    pointer_level=None,
+                    signature=None,
+                    members=members_dict,
+                    debug_info=struct_debug_info,
+                )
+                logger.info(f"Added struct assignment info for {struct.name}")
+
+            self.generated.append(struct.name)
+
+        finally:
+            # Remove from processing stack after we're done
+            processing_stack.discard(struct.name)
+
+    def gen_ir(self, struct, generated_debug_info):
+        # TODO: we add the btf_ama attribute by monkey patching in the end of compilation, but once llvmlite
+        #  accepts our issue, we will resort to normal accessed attribute based attribute addition
+        # currently we generate all possible field accesses for CO-RE and put into the assignment table
+        debug_info = debug_info_generation(
+            struct, self.llvm_module, generated_debug_info
+        )
+        field_index = 0
+
+        # Make sure the struct has an entry in our field names dictionary
+        if struct.name not in self.generated_field_names:
+            self.generated_field_names[struct.name] = {}
+
+        for field_name, field in struct.fields.items():
+            # does not take arrays and similar types into consideration yet.
+            if callable(field.ctype_complex_type):
+                # Function pointer case - generate a simple field accessor
+                field_co_re_name, returned = self._struct_name_generator(
+                    struct, field, field_index
+                )
+                field_index += 1
+                globvar = ir.GlobalVariable(
+                    self.llvm_module, ir.IntType(64), name=field_co_re_name
+                )
+                globvar.linkage = "external"
+                globvar.set_metadata("llvm.preserve.access.index", debug_info)
+                self.generated_field_names[struct.name][field_name] = globvar
+            elif field.ctype_complex_type is not None and issubclass(
+                field.ctype_complex_type, ctypes.Array
+            ):
+                array_size = field.type_size
+                containing_type = field.containing_type
+                if containing_type.__module__ == ctypes.__name__:
+                    containing_type_size = ctypes.sizeof(containing_type)
+                    if array_size == 0:
+                        field_co_re_name, returned = self._struct_name_generator(
+                            struct, field, field_index, True, 0, containing_type_size
+                        )
+                        globvar = ir.GlobalVariable(
+                            self.llvm_module, ir.IntType(64), name=field_co_re_name
+                        )
+                        globvar.linkage = "external"
+                        globvar.set_metadata("llvm.preserve.access.index", debug_info)
+                        self.generated_field_names[struct.name][field_name] = globvar
+                        field_index += 1
+                        continue
+                    for i in range(0, array_size):
+                        field_co_re_name, returned = self._struct_name_generator(
+                            struct, field, field_index, True, i, containing_type_size
+                        )
+                        globvar = ir.GlobalVariable(
+                            self.llvm_module, ir.IntType(64), name=field_co_re_name
+                        )
+                        globvar.linkage = "external"
+                        globvar.set_metadata("llvm.preserve.access.index", debug_info)
+                        self.generated_field_names[struct.name][field_name] = globvar
+                    field_index += 1
+            elif field.type_size is not None:
+                array_size = field.type_size
+                containing_type = field.containing_type
+                if containing_type.__module__ == "vmlinux":
+                    # Unwrap all pointer layers to get the base struct type
+                    base_containing_type = containing_type
+                    while hasattr(base_containing_type, "_type_"):
+                        next_type = base_containing_type._type_
+                        # Stop if _type_ is a string (like 'c' for c_char)
+                        # TODO: stacked pointers not handl;ing ctypes check here as well
+                        if isinstance(next_type, str):
+                            break
+                        base_containing_type = next_type
+
+                    # Get the base struct name
+                    base_struct_name = (
+                        base_containing_type.__name__
+                        if hasattr(base_containing_type, "__name__")
+                        else str(base_containing_type)
+                    )
+
+                    # Look up the size using the base struct name
+                    containing_type_size = self.handler[base_struct_name].current_offset
+                    if array_size == 0:
+                        field_co_re_name, returned = self._struct_name_generator(
+                            struct, field, field_index, True, 0, containing_type_size
+                        )
+                        globvar = ir.GlobalVariable(
+                            self.llvm_module, ir.IntType(64), name=field_co_re_name
+                        )
+                        globvar.linkage = "external"
+                        globvar.set_metadata("llvm.preserve.access.index", debug_info)
+                        self.generated_field_names[struct.name][field_name] = globvar
+                        field_index += 1
+                    else:
+                        for i in range(0, array_size):
+                            field_co_re_name, returned = self._struct_name_generator(
+                                struct,
+                                field,
+                                field_index,
+                                True,
+                                i,
+                                containing_type_size,
+                            )
+                            globvar = ir.GlobalVariable(
+                                self.llvm_module, ir.IntType(64), name=field_co_re_name
+                            )
+                            globvar.linkage = "external"
+                            globvar.set_metadata(
+                                "llvm.preserve.access.index", debug_info
+                            )
+                            self.generated_field_names[struct.name][field_name] = (
+                                globvar
+                            )
+                        field_index += 1
+            else:
+                field_co_re_name, returned = self._struct_name_generator(
+                    struct, field, field_index
+                )
+                field_index += 1
+                globvar = ir.GlobalVariable(
+                    self.llvm_module, ir.IntType(64), name=field_co_re_name
+                )
+                globvar.linkage = "external"
+                globvar.set_metadata("llvm.preserve.access.index", debug_info)
+                self.generated_field_names[struct.name][field_name] = globvar
+        return debug_info
+
+    def _struct_name_generator(
+        self,
+        struct: DependencyNode,
+        field,
+        field_index: int,
+        is_indexed: bool = False,
+        index: int = 0,
+        containing_type_size: int = 0,
+    ) -> tuple[str, bool]:
+        # TODO: Does not support Unions as well as recursive pointer and array type naming
+        if is_indexed:
+            name = (
+                "llvm."
+                + struct.name.removeprefix("struct_")
+                + f":0:{field.offset + index * containing_type_size}"
+                + "$"
+                + f"0:{field_index}:{index}"
+            )
+            return name, True
+        elif struct.name.startswith("struct_"):
+            name = (
+                "llvm."
+                + struct.name.removeprefix("struct_")
+                + f":0:{field.offset}"
+                + "$"
+                + f"0:{field_index}"
+            )
+            return name, True
+        else:
+            logger.warning(
+                "Blindly handling non-struct type to avoid type errors in vmlinux IR generation. Possibly a union."
+            )
+            self.type_number += 1
+            unprocessed_type = "unprocessed_type_" + str(self.handler[struct.name].name)
+            if self.unprocessed_store.__contains__(unprocessed_type):
+                return unprocessed_type + "_" + str(self.type_number), False
+            else:
+                self.unprocessed_store.append(unprocessed_type)
+                return unprocessed_type, False
+            # raise TypeError(
+            #     "Name generation cannot occur due to type name not starting with struct"
+            # )

pythonbpf/vmlinux_parser/ir_generation.py

@@ -1,14 +0,0 @@
-import logging
-from .dependency_handler import DependencyHandler
-
-logger = logging.getLogger(__name__)
-
-
-class IRGenerator:
-    def __init__(self, module, handler: DependencyHandler):
-        self.module = module
-        self.handler: DependencyHandler = handler
-        if not handler.is_ready:
-            raise ImportError(
-                "Semantic analysis of vmlinux imports failed. Cannot generate IR"
-            )

pythonbpf/vmlinux_parser/vmlinux_exports_handler.py

@@ -0,0 +1,406 @@
+import logging
+from typing import Any
+import ctypes
+from llvmlite import ir
+
+from pythonbpf.local_symbol import LocalSymbol
+from pythonbpf.vmlinux_parser.assignment_info import AssignmentType
+
+logger = logging.getLogger(__name__)
+
+
+class VmlinuxHandler:
+    """Handler for vmlinux-related operations"""
+
+    _instance = None
+
+    @classmethod
+    def get_instance(cls):
+        """Get the singleton instance"""
+        if cls._instance is None:
+            logger.warning("VmlinuxHandler used before initialization")
+            return None
+        return cls._instance
+
+    @classmethod
+    def initialize(cls, vmlinux_symtab):
+        """Initialize the handler with vmlinux symbol table"""
+        cls._instance = cls(vmlinux_symtab)
+        return cls._instance
+
+    def __init__(self, vmlinux_symtab):
+        """Initialize with vmlinux symbol table"""
+        self.vmlinux_symtab = vmlinux_symtab
+        logger.info(
+            f"VmlinuxHandler initialized with {len(vmlinux_symtab) if vmlinux_symtab else 0} symbols"
+        )
+
+    def is_vmlinux_enum(self, name):
+        """Check if name is a vmlinux enum constant"""
+        return (
+            name in self.vmlinux_symtab
+            and self.vmlinux_symtab[name].value_type == AssignmentType.CONSTANT
+        )
+
+    def get_struct_debug_info(self, name: str) -> Any:
+        if (
+            name in self.vmlinux_symtab
+            and self.vmlinux_symtab[name].value_type == AssignmentType.STRUCT
+        ):
+            return self.vmlinux_symtab[name].debug_info
+        else:
+            raise ValueError(f"{name} is not a vmlinux struct type")
+
+    def get_vmlinux_struct_type(self, name):
+        """Check if name is a vmlinux struct type"""
+        if (
+            name in self.vmlinux_symtab
+            and self.vmlinux_symtab[name].value_type == AssignmentType.STRUCT
+        ):
+            return self.vmlinux_symtab[name].python_type
+        else:
+            raise ValueError(f"{name} is not a vmlinux struct type")
+
+    def is_vmlinux_struct(self, name):
+        """Check if name is a vmlinux struct"""
+        return (
+            name in self.vmlinux_symtab
+            and self.vmlinux_symtab[name].value_type == AssignmentType.STRUCT
+        )
+
+    def handle_vmlinux_enum(self, name):
+        """Handle vmlinux enum constants by returning LLVM IR constants"""
+        if self.is_vmlinux_enum(name):
+            value = self.vmlinux_symtab[name].value
+            logger.info(f"Resolving vmlinux enum {name} = {value}")
+            return ir.Constant(ir.IntType(64), value), ir.IntType(64)
+        return None
+
+    def get_vmlinux_enum_value(self, name):
+        """Handle vmlinux.enum constants by returning LLVM IR constants"""
+        if self.is_vmlinux_enum(name):
+            value = self.vmlinux_symtab[name].value
+            logger.info(f"The value of vmlinux enum {name} = {value}")
+            return value
+        return None
+
+    def handle_vmlinux_struct_field(
+        self, struct_var_name, field_name, module, builder, local_sym_tab
+    ):
+        """Handle access to vmlinux struct fields"""
+        if struct_var_name in local_sym_tab:
+            var_info: LocalSymbol = local_sym_tab[struct_var_name]
+            logger.info(
+                f"Attempting to access field {field_name} of possible vmlinux struct {struct_var_name}"
+            )
+            python_type: type = var_info.metadata
+            # Check if this is a context field (ctx) or a cast struct
+            is_context_field = var_info.var is None
+
+            if is_context_field:
+                # Handle context field access (original behavior)
+                struct_name = python_type.__name__
+                globvar_ir, field_data = self.get_field_type(struct_name, field_name)
+                builder.function.args[0].type = ir.PointerType(ir.IntType(8))
+                field_ptr = self.load_ctx_field(
+                    builder,
+                    builder.function.args[0],
+                    globvar_ir,
+                    field_data,
+                    struct_name,
+                )
+                return field_ptr, field_data
+            else:
+                # Handle cast struct field access
+                struct_name = python_type.__name__
+                globvar_ir, field_data = self.get_field_type(struct_name, field_name)
+
+                # Handle cast struct field access (use bpf_probe_read_kernel)
+                # Load the struct pointer from the local variable
+                struct_ptr = builder.load(var_info.var)
+
+                # Determine the preallocated tmp name that assignment pass should have created
+                tmp_name = f"{struct_var_name}_{field_name}_tmp"
+
+                # Use bpf_probe_read_kernel for non-context struct field access
+                field_value = self.load_struct_field(
+                    builder,
+                    struct_ptr,
+                    globvar_ir,
+                    field_data,
+                    struct_name,
+                    local_sym_tab,
+                    tmp_name,
+                )
+                # Return field value and field type
+                return field_value, field_data
+        else:
+            raise RuntimeError("Variable accessed not found in symbol table")
+
+    @staticmethod
+    def load_struct_field(
+        builder,
+        struct_ptr_int,
+        offset_global,
+        field_data,
+        struct_name=None,
+        local_sym_tab=None,
+        tmp_name: str | None = None,
+    ):
+        """
+        Generate LLVM IR to load a field from a regular (non-context) struct using bpf_probe_read_kernel.
+
+        Args:
+            builder: llvmlite IRBuilder instance
+            struct_ptr_int: The struct pointer as an i64 value (already loaded from alloca)
+            offset_global: Global variable containing the field offset (i64)
+            field_data: contains data about the field
+            struct_name: Name of the struct being accessed (optional)
+            local_sym_tab: symbol table (optional) - used to locate preallocated tmp storage
+            tmp_name: name of the preallocated temporary storage to use (preferred)
+        Returns:
+            The loaded value
+        """
+
+        # Load the offset value
+        offset = builder.load(offset_global)
+
+        # Convert i64 to pointer type (BPF stores pointers as i64)
+        i8_ptr_type = ir.PointerType(ir.IntType(8))
+        struct_ptr = builder.inttoptr(struct_ptr_int, i8_ptr_type)
+
+        # GEP with offset to get field pointer
+        field_ptr = builder.gep(
+            struct_ptr,
+            [offset],
+            inbounds=False,
+        )
+
+        # Determine the appropriate field size based on field information
+        field_size_bytes = 8  # Default to 8 bytes (64-bit)
+        int_width = 64  # Default to 64-bit
+        needs_zext = False
+
+        if field_data is not None:
+            # Try to determine the size from field metadata
+            if field_data.type.__module__ == ctypes.__name__:
+                try:
+                    field_size_bytes = ctypes.sizeof(field_data.type)
+                    field_size_bits = field_size_bytes * 8
+
+                    if field_size_bits in [8, 16, 32, 64]:
+                        int_width = field_size_bits
+                        logger.info(
+                            f"Determined field size: {int_width} bits ({field_size_bytes} bytes)"
+                        )
+
+                        # Special handling for struct_xdp_md i32 fields
+                        if struct_name == "struct_xdp_md" and int_width == 32:
+                            needs_zext = True
+                            logger.info(
+                                "struct_xdp_md i32 field detected, will zero-extend to i64"
+                            )
+                    else:
+                        logger.warning(
+                            f"Unusual field size {field_size_bits} bits, using default 64"
+                        )
+                except Exception as e:
+                    logger.warning(
+                        f"Could not determine field size: {e}, using default 64"
+                    )
+
+            elif field_data.type.__module__ == "vmlinux":
+                # For pointers to structs or complex vmlinux types
+                if field_data.ctype_complex_type is not None and issubclass(
+                    field_data.ctype_complex_type, ctypes._Pointer
+                ):
+                    int_width = 64  # Pointers are always 64-bit
+                    field_size_bytes = 8
+                    logger.info("Field is a pointer type, using 64 bits")
+                else:
+                    logger.warning("Complex vmlinux field type, using default 64 bits")
+
+        # Use preallocated temporary storage if provided by allocation pass
+
+        local_storage_i8_ptr = None
+        if tmp_name and local_sym_tab and tmp_name in local_sym_tab:
+            # Expect the tmp to be an alloca created during allocation pass
+            tmp_alloca = local_sym_tab[tmp_name].var
+            local_storage_i8_ptr = builder.bitcast(tmp_alloca, i8_ptr_type)
+        else:
+            # Fallback: allocate inline (not ideal, but preserves behavior)
+            local_storage = builder.alloca(ir.IntType(int_width))
+            local_storage_i8_ptr = builder.bitcast(local_storage, i8_ptr_type)
+            logger.warning(f"Temp storage '{tmp_name}' not found. Allocating inline")
+
+        # Use bpf_probe_read_kernel to safely read the field
+        # This generates:
+        #   %gep = getelementptr i8, ptr %struct_ptr, i64 %offset (already done above as field_ptr)
+        #   %passed = tail call ptr @llvm.bpf.passthrough.p0.p0(i32 2, ptr %gep)
+        #   %result = call i64 inttoptr (i64 113 to ptr)(ptr %local_storage, i32 %size, ptr %passed)
+        from pythonbpf.helper import emit_probe_read_kernel_call
+
+        emit_probe_read_kernel_call(
+            builder, local_storage_i8_ptr, field_size_bytes, field_ptr
+        )
+
+        # Load the value from local storage
+        value = builder.load(
+            builder.bitcast(local_storage_i8_ptr, ir.PointerType(ir.IntType(int_width)))
+        )
+
+        # Zero-extend i32 to i64 if needed
+        if needs_zext:
+            value = builder.zext(value, ir.IntType(64))
+            logger.info("Zero-extended i32 value to i64")
+
+        return value
+
+    @staticmethod
+    def load_ctx_field(builder, ctx_arg, offset_global, field_data, struct_name=None):
+        """
+        Generate LLVM IR to load a field from BPF context using offset.
+
+        Args:
+            builder: llvmlite IRBuilder instance
+            ctx_arg: The context pointer argument (ptr/i8*)
+            offset_global: Global variable containing the field offset (i64)
+            field_data: contains data about the field
+            struct_name: Name of the struct being accessed (optional)
+        Returns:
+            The loaded value (i64 register or appropriately sized)
+        """
+
+        # Load the offset value
+        offset = builder.load(offset_global)
+
+        # Ensure ctx_arg is treated as i8* (byte pointer)
+        i8_ptr_type = ir.PointerType()
+
+        # Cast ctx_arg to i8* if it isn't already
+        if str(ctx_arg.type) != str(i8_ptr_type):
+            ctx_i8_ptr = builder.bitcast(ctx_arg, i8_ptr_type)
+        else:
+            ctx_i8_ptr = ctx_arg
+
+        # GEP with explicit type - this is the key fix
+        field_ptr = builder.gep(
+            ctx_i8_ptr,
+            [offset],
+            inbounds=False,
+        )
+
+        # Get or declare the BPF passthrough intrinsic
+        module = builder.function.module
+
+        try:
+            passthrough_fn = module.globals.get("llvm.bpf.passthrough.p0.p0")
+            if passthrough_fn is None:
+                raise KeyError
+        except (KeyError, AttributeError):
+            passthrough_type = ir.FunctionType(
+                i8_ptr_type,
+                [ir.IntType(32), i8_ptr_type],
+            )
+            passthrough_fn = ir.Function(
+                module,
+                passthrough_type,
+                name="llvm.bpf.passthrough.p0.p0",
+            )
+
+        # Call passthrough to satisfy BPF verifier
+        verified_ptr = builder.call(
+            passthrough_fn, [ir.Constant(ir.IntType(32), 0), field_ptr], tail=True
+        )
+
+        # Determine the appropriate IR type based on field information
+        int_width = 64  # Default to 64-bit
+        needs_zext = False  # Track if we need zero-extension for xdp_md
+
+        if field_data is not None:
+            # Try to determine the size from field metadata
+            if field_data.type.__module__ == ctypes.__name__:
+                try:
+                    field_size_bytes = ctypes.sizeof(field_data.type)
+                    field_size_bits = field_size_bytes * 8
+
+                    if field_size_bits in [8, 16, 32, 64]:
+                        int_width = field_size_bits
+                        logger.info(f"Determined field size: {int_width} bits")
+
+                        # Special handling for struct_xdp_md i32 fields
+                        # Load as i32 but extend to i64 before storing
+                        if struct_name == "struct_xdp_md" and int_width == 32:
+                            needs_zext = True
+                            logger.info(
+                                "struct_xdp_md i32 field detected, will zero-extend to i64"
+                            )
+                    else:
+                        logger.warning(
+                            f"Unusual field size {field_size_bits} bits, using default 64"
+                        )
+                except Exception as e:
+                    logger.warning(
+                        f"Could not determine field size: {e}, using default 64"
+                    )
+
+            elif field_data.type.__module__ == "vmlinux":
+                # For pointers to structs or complex vmlinux types
+                if field_data.ctype_complex_type is not None and issubclass(
+                    field_data.ctype_complex_type, ctypes._Pointer
+                ):
+                    int_width = 64  # Pointers are always 64-bit
+                    logger.info("Field is a pointer type, using 64 bits")
+                # TODO: Add handling for other complex types (arrays, embedded structs, etc.)
+                else:
+                    logger.warning("Complex vmlinux field type, using default 64 bits")
+
+        # Bitcast to appropriate pointer type based on determined width
+        ptr_type = ir.PointerType(ir.IntType(int_width))
+
+        typed_ptr = builder.bitcast(verified_ptr, ptr_type)
+
+        # Load and return the value
+        value = builder.load(typed_ptr)
+
+        # Zero-extend i32 to i64 for struct_xdp_md fields
+        if needs_zext:
+            value = builder.zext(value, ir.IntType(64))
+            logger.info("Zero-extended i32 value to i64 for struct_xdp_md field")
+
+        return value
+
+    def has_field(self, struct_name, field_name):
+        """Check if a vmlinux struct has a specific field"""
+        if self.is_vmlinux_struct(struct_name):
+            python_type = self.vmlinux_symtab[struct_name].python_type
+            return hasattr(python_type, field_name)
+        return False
+
+    def get_field_type(self, vmlinux_struct_name, field_name):
+        """Get the type of a field in a vmlinux struct"""
+        if self.is_vmlinux_struct(vmlinux_struct_name):
+            python_type = self.vmlinux_symtab[vmlinux_struct_name].python_type
+            if hasattr(python_type, field_name):
+                return self.vmlinux_symtab[vmlinux_struct_name].members[field_name]
+            else:
+                raise ValueError(
+                    f"Field {field_name} not found in vmlinux struct {vmlinux_struct_name}"
+                )
+        else:
+            raise ValueError(f"{vmlinux_struct_name} is not a vmlinux struct")
+
+    def get_field_index(self, vmlinux_struct_name, field_name):
+        """Get the type of a field in a vmlinux struct"""
+        if self.is_vmlinux_struct(vmlinux_struct_name):
+            python_type = self.vmlinux_symtab[vmlinux_struct_name].python_type
+            if hasattr(python_type, field_name):
+                return list(
+                    self.vmlinux_symtab[vmlinux_struct_name].members.keys()
+                ).index(field_name)
+            else:
+                raise ValueError(
+                    f"Field {field_name} not found in vmlinux struct {vmlinux_struct_name}"
+                )
+        else:
+            raise ValueError(f"{vmlinux_struct_name} is not a vmlinux struct")

tests/c-form/Makefile

@@ -1,19 +1,22 @@
 BPF_CLANG := clang
-CFLAGS := -O2 -emit-llvm -target bpf -c
+CFLAGS := -emit-llvm -target bpf -c -D__TARGET_ARCH_x86
 
 SRC := $(wildcard *.bpf.c)
 LL := $(SRC:.bpf.c=.bpf.ll)
 OBJ := $(SRC:.bpf.c=.bpf.o)
-
+LL0 := $(SRC:.bpf.c=.bpf.o0.ll)
 .PHONY: all clean
 
-all: $(LL) $(OBJ)
+all: $(LL) $(OBJ) $(LL0)
 
 %.bpf.o: %.bpf.c
-	$(BPF_CLANG) -O2 -g -target bpf -c $< -o $@
+	$(BPF_CLANG) -O2 -D__TARGET_ARCH_x86 -g -target bpf -c $< -o $@
 
 %.bpf.ll: %.bpf.c
-	$(BPF_CLANG) $(CFLAGS) -g -S $< -o $@
+	$(BPF_CLANG) $(CFLAGS) -O2 -g -S $< -o $@
+
+%.bpf.o0.ll: %.bpf.c
+	$(BPF_CLANG) $(CFLAGS) -O0 -g -S $< -o $@
 
 clean:
-	rm -f $(LL) $(OBJ)
+	rm -f $(LL) $(OBJ) $(LL0)

tests/c-form/disksnoop.bpf.c

@@ -0,0 +1,66 @@
+// disksnoop.bpf.c
+// eBPF program (compile with: clang -O2 -g -target bpf -c disksnoop.bpf.c -o disksnoop.bpf.o)
+
+#include "vmlinux.h"
+#include <bpf/bpf_helpers.h>
+#include <bpf/bpf_core_read.h>
+
+char LICENSE[] SEC("license") = "GPL";
+
+struct {
+    __uint(type, BPF_MAP_TYPE_HASH);
+    __type(key, __u64);
+    __type(value, __u64);
+    __uint(max_entries, 10240);
+} start_map SEC(".maps");
+
+/* kprobe: record start timestamp keyed by request pointer */
+SEC("kprobe/blk_mq_start_request")
+int trace_start(struct pt_regs *ctx)
+{
+    /* request * is first arg */
+    __u64 reqp = (__u64)(ctx->di);
+    __u64 ts = bpf_ktime_get_ns();
+
+    bpf_map_update_elem(&start_map, &reqp, &ts, BPF_ANY);
+
+//  /* optional debug:
+    bpf_printk("start: req=%llu ts=%llu\n", reqp, ts);
+//  */
+    return 0;
+}
+
+/* completion: compute latency and print data_len, cmd_flags, latency_us */
+SEC("kprobe/blk_mq_end_request")
+int trace_completion(struct pt_regs *ctx)
+{
+    __u64 reqp = (__u64)(ctx->di);
+    __u64 *tsp;
+    __u64 now_ns;
+    __u64 delta_ns;
+    __u64 delta_us = 0;
+    bpf_printk("%lld", reqp);
+    tsp = bpf_map_lookup_elem(&start_map, &reqp);
+    if (!tsp)
+        return 0;
+
+    now_ns = bpf_ktime_get_ns();
+    delta_ns = now_ns - *tsp;
+    delta_us = delta_ns / 1000;
+
+    /* read request fields using CO-RE; needs vmlinux.h/BTF */
+    __u32 data_len = 0;
+    __u32 cmd_flags = 0;
+
+    /* __data_len is usually a 32/64-bit; use CORE read to be safe */
+    data_len = ( __u32 ) BPF_CORE_READ((struct request *)reqp, __data_len);
+    cmd_flags = ( __u32 ) BPF_CORE_READ((struct request *)reqp, cmd_flags);
+
+    /* print: "<bytes> <flags_hex> <latency_us>" */
+    bpf_printk("%u %x %llu\n", data_len, cmd_flags, delta_us);
+
+    /* remove from map */
+    bpf_map_delete_elem(&start_map, &reqp);
+
+    return 0;
+}

tests/c-form/ex5.bpf.c

@@ -1,25 +0,0 @@
-#define __TARGET_ARCH_arm64
-
-#include "vmlinux.h"
-#include <bpf/bpf_helpers.h>
-#include <bpf/bpf_tracing.h>
-#include <bpf/bpf_core_read.h>
-
-// Map: key = struct request*, value = u64 timestamp
-struct {
-    __uint(type, BPF_MAP_TYPE_HASH);
-    __type(key, struct request *);
-    __type(value, u64);
-    __uint(max_entries, 1024);
-} start SEC(".maps");
-
-// Attach to kprobe for blk_start_request
-SEC("kprobe/blk_start_request")
-int BPF_KPROBE(trace_start, struct request *req)
-{
-    u64 ts = bpf_ktime_get_ns();
-    bpf_map_update_elem(&start, &req, &ts, BPF_ANY);
-    return 0;
-}
-
-char LICENSE[] SEC("license") = "GPL";

tests/c-form/ex7.bpf.c

@@ -1,23 +1,9 @@
 // SPDX-License-Identifier: GPL-2.0
 
-#include <linux/bpf.h>
+#include "vmlinux.h"
 #include <bpf/bpf_helpers.h>
 #include <bpf/bpf_tracing.h>
 
-struct trace_entry {
-  short unsigned int type;
-  unsigned char flags;
-  unsigned char preempt_count;
-  int pid;
-};
-
-struct trace_event_raw_sys_enter {
-  struct trace_entry ent;
-  long int id;
-  long unsigned int args[6];
-  char __data[0];
-};
-
 struct event {
   __u32 pid;
   __u32 uid;
@@ -33,7 +19,7 @@ struct {
 SEC("tp/syscalls/sys_enter_setuid")
 int handle_setuid_entry(struct trace_event_raw_sys_enter *ctx) {
   struct event data = {};
-
+  struct blk_integrity_iter it = {};
   // Extract UID from the syscall arguments
   data.uid = (unsigned int)ctx->args[0];
   data.ts = bpf_ktime_get_ns();

tests/c-form/i32test.bpf.c

@@ -0,0 +1,15 @@
+#include <linux/bpf.h>
+#include <bpf/bpf_helpers.h>
+
+SEC("xdp")
+int print_xdp_data(struct xdp_md *ctx)
+{
+    // 'data' is a pointer to the start of packet data
+    long data = (long)ctx->data;
+
+    bpf_printk("ctx->data = %lld\n", data);
+
+    return XDP_PASS;
+}
+
+char LICENSE[] SEC("license") = "GPL";

tests/c-form/kprobe.bpf.c

@@ -2,18 +2,75 @@
 #include <bpf/bpf_helpers.h>
 #include <bpf/bpf_tracing.h>
 
-char LICENSE[] SEC("license") = "Dual BSD/GPL";
+char LICENSE[] SEC("license") = "GPL";
 
 SEC("kprobe/do_unlinkat")
 int kprobe_execve(struct pt_regs *ctx)
 {
     bpf_printk("unlinkat created");
-    return 0;
-}
 
-SEC("kretprobe/do_unlinkat")
-int kretprobe_execve(struct pt_regs *ctx)
-{
-    bpf_printk("unlinkat returned\n");
+    unsigned long r15 = ctx->r15;
+    bpf_printk("r15: %lld", r15);
+
+    unsigned long r14 = ctx->r14;
+    bpf_printk("r14: %lld", r14);
+
+    unsigned long r13 = ctx->r13;
+    bpf_printk("r13: %lld", r13);
+
+    unsigned long r12 = ctx->r12;
+    bpf_printk("r12: %lld", r12);
+
+    unsigned long bp = ctx->bp;
+    bpf_printk("rbp: %lld", bp);
+
+    unsigned long bx = ctx->bx;
+    bpf_printk("rbx: %lld", bx);
+
+    unsigned long r11 = ctx->r11;
+    bpf_printk("r11: %lld", r11);
+
+    unsigned long r10 = ctx->r10;
+    bpf_printk("r10: %lld", r10);
+
+    unsigned long r9 = ctx->r9;
+    bpf_printk("r9: %lld", r9);
+
+    unsigned long r8 = ctx->r8;
+    bpf_printk("r8: %lld", r8);
+
+    unsigned long ax = ctx->ax;
+    bpf_printk("rax: %lld", ax);
+
+    unsigned long cx = ctx->cx;
+    bpf_printk("rcx: %lld", cx);
+
+    unsigned long dx = ctx->dx;
+    bpf_printk("rdx: %lld", dx);
+
+    unsigned long si = ctx->si;
+    bpf_printk("rsi: %lld", si);
+
+    unsigned long di = ctx->di;
+    bpf_printk("rdi: %lld", di);
+
+    unsigned long orig_ax = ctx->orig_ax;
+    bpf_printk("orig_rax: %lld", orig_ax);
+
+    unsigned long ip = ctx->ip;
+    bpf_printk("rip: %lld", ip);
+
+    unsigned long cs = ctx->cs;
+    bpf_printk("cs: %lld", cs);
+
+    unsigned long flags = ctx->flags;
+    bpf_printk("eflags: %lld", flags);
+
+    unsigned long sp = ctx->sp;
+    bpf_printk("rsp: %lld", sp);
+
+    unsigned long ss = ctx->ss;
+    bpf_printk("ss: %lld", ss);
+
     return 0;
 }

tests/c-form/requests.bpf.c

@@ -0,0 +1,18 @@
+#include "vmlinux.h"
+#include <bpf/bpf_helpers.h>
+#include <bpf/bpf_tracing.h>
+#include <bpf/bpf_core_read.h>
+
+char LICENSE[] SEC("license") = "GPL";
+
+SEC("kprobe/blk_mq_start_request")
+int example(struct pt_regs *ctx)
+{
+    u64 a = ctx->r15;
+    struct request *req = (struct request *)(ctx->di);
+    unsigned int something_ns = BPF_CORE_READ(req, timeout);
+    unsigned int data_len = BPF_CORE_READ(req, __data_len);
+    bpf_printk("data length %lld %ld %ld\n", data_len,  something_ns, a);
+
+    return 0;
+}

tests/c-form/requests2.bpf.c

@@ -0,0 +1,18 @@
+#include "vmlinux.h"
+#include <bpf/bpf_helpers.h>
+#include <bpf/bpf_tracing.h>
+#include <bpf/bpf_core_read.h>
+
+char LICENSE[] SEC("license") = "GPL";
+
+SEC("kprobe/blk_mq_start_request")
+int example(struct pt_regs *ctx)
+{
+    u64 a = ctx->r15;
+    struct request *req = (struct request *)(ctx->di);
+    unsigned int something_ns = req->timeout;
+    unsigned int data_len = req->__data_len;
+    bpf_printk("data length %lld %ld %ld\n", data_len,  something_ns, a);
+
+    return 0;
+}

tests/c-form/struct_field_tests.bpf.c

@@ -0,0 +1,42 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include "vmlinux.h"
+#include <bpf/bpf_helpers.h>
+#include <bpf/bpf_tracing.h>
+
+/*
+Information gained from reversing this (multiple kernel versions):
+There is no point of
+```llvm
+ tail call void @llvm.dbg.value(metadata ptr %0, metadata !60, metadata !DIExpression()), !dbg !70
+ ```
+ and the first argument of passthrough is fucking useless. It just needs to be a distinct integer:
+ ```llvm
+   %9 = tail call ptr @llvm.bpf.passthrough.p0.p0(i32 3, ptr %8)
+ ```
+*/
+
+SEC("tp/syscalls/sys_enter_execve")
+int handle_setuid_entry(struct trace_event_raw_sys_enter *ctx) {
+  // Access each argument separately with clear variable assignments
+  long int id = ctx->id;
+  bpf_printk("This is context field %d", id);
+  /*
+   * the IR to aim for is
+   * %2 = alloca ptr, align 8
+   * store ptr %0, ptr %2, align 8
+   * Above, %0 is the arg pointer
+   * %5 = load ptr, ptr %2, align 8
+   * %6 = getelementptr inbounds %struct.trace_event_raw_sys_enter, ptr %5, i32 0, i32 2
+   * %7 = load i64, ptr @"llvm.trace_event_raw_sys_enter:0:16$0:2:0", align 8
+   * %8 = bitcast ptr %5 to ptr
+   * %9 = getelementptr i8, ptr %8, i64 %7
+   * %10 = bitcast ptr %9 to ptr
+   * %11 = call ptr @llvm.bpf.passthrough.p0.p0(i32 0, ptr %10)
+   * %12 = load i64, ptr %11, align 8, !dbg !101
+   *
+   */
+  return 0;
+}
+
+char LICENSE[] SEC("license") = "GPL";