Make bytes_to_python const non-static

Add userspace utils for Structs and maps, starting with PERF_EVENT_ARRAY

.github/workflows/pip.yml

@@ -1,29 +1,38 @@
 name: Pip
 
 on:
-  workflow_dispatch:
-  pull_request:
   push:
-    branches:
-      - master
-      - main
+    branches: [main, master]
+  pull_request:
+    branches: [main, master]
+  workflow_dispatch:
 
 jobs:
-  build:
+  test:
+    name: Test on Python ${{ matrix.python-version }}
+    runs-on: ubuntu-latest
     strategy:
       fail-fast: false
       matrix:
-        platform: [ubuntu-latest]
-        python-version: ["3.8", "3.12"]
-
-    runs-on: ${{ matrix.platform }}
+        python-version: ['3.12', '3.13']
 
     steps:
-    - uses: actions/checkout@v5
+    - name: Checkout code
+      uses: actions/checkout@v5
       with:
-        submodules: true
+        submodules: recursive
 
-    - uses: actions/setup-python@v6
+    - name: Verify submodules
+      run: |
+        echo "Checking submodule status:"
+        git submodule status
+        echo "Checking libbpf directory:"
+        ls -la libbpf/
+        echo "Checking libbpf/src:"
+        ls -la libbpf/src/ || echo "libbpf/src not found!"
+
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
 
@@ -33,19 +42,72 @@ jobs:
         sudo apt-get install -y \
           libbpf-dev \
           libelf-dev \
-          linux-headers-generic \
+          zlib1g-dev \
           build-essential \
+          clang \
           cmake \
-          ninja-build
+          ninja-build \
+          pkg-config \
+          git \
+          make
 
-    - name: Add requirements
-      run: python -m pip install --upgrade pip wheel setuptools
+    - name: Install Python build dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install --upgrade "setuptools>=77.0.0" wheel
+        pip install cmake ninja pybind11
 
-    - name: Build and install
-      run: pip install --verbose .[test]
+    - name: Check build requirements
+      run: |
+        echo "Python version:"
+        python --version
+        echo "CMake version:"
+        cmake --version
+        echo "Ninja version:"
+        ninja --version
+        echo "Setuptools version:"
+        python -c "import setuptools; print(setuptools.__version__)"
 
-    - name: Test import
-      run: python -c "import pylibbpf; print('Import successful')"
+    - name: Build and install pylibbpf (verbose)
+      run: |
+        pip install -v -e . 2>&1 | tee build.log
+      continue-on-error: false
 
-    - name: Test
-      run: python -m pytest -v
+    - name: Check build output
+      run: |
+        echo "Build directory contents:"
+        find build -type f -name "*.so" 2>/dev/null || echo "No .so files found in build/"
+        echo ""
+        echo "Looking for pylibbpf extension:"
+        find . -name "pylibbpf*.so" -o -name "pylibbpf*.pyd"
+        echo ""
+        echo "Site-packages contents:"
+        python -c "import site; print(site.getsitepackages())"
+        ls -la $(python -c "import site; print(site.getsitepackages()[0])")/pylibbpf/ || echo "pylibbpf not in site-packages"
+
+    - name: Try importing extension directly
+      run: |
+        python -c "
+        import sys
+        print('Python path:', sys.path)
+        try:
+            from pylibbpf import pylibbpf
+            print('Successfully imported pylibbpf.pylibbpf')
+            print('pylibbpf.pylibbpf members:', dir(pylibbpf))
+        except ImportError as e:
+            print(f'Failed to import pylibbpf.pylibbpf: {e}')
+        "
+
+    - name: Verify extension loaded
+      run: |
+        python -c "import pylibbpf; print('Members:', dir(pylibbpf)); assert hasattr(pylibbpf, 'BpfObject'), 'BpfObject not found!'; print('✓ OK')"
+
+    - name: Install test dependencies
+      if: success()
+      run: |
+        pip install pytest pytest-cov
+
+    - name: Run tests
+      if: success()
+      run: |
+        python -I -m pytest -v -s --cov=pylibbpf --cov-report=term-missing

.github/workflows/wheels.yml

@@ -17,7 +17,7 @@ jobs:
     steps:
     - uses: actions/checkout@v5
       with:
-        submodules: true
+        submodules: recursive
 
     - name: Build SDist
       run: pipx run build --sdist
@@ -41,22 +41,24 @@ jobs:
     steps:
     - uses: actions/checkout@v5
       with:
-        submodules: true
+        submodules: recursive
 
     - name: Build wheels
       uses: pypa/cibuildwheel@v3.2
       env:
         CIBW_PLATFORM: linux
         CIBW_ARCHS_LINUX: ${{ matrix.arch }}
-        CIBW_BUILD: "cp38-* cp311-*"
+        CIBW_BUILD: "cp312-* cp313-*"
         CIBW_SKIP: "*-musllinux*"
-        CIBW_TEST_COMMAND: "python -c 'import pylibbpf; print(f\"pylibbpf {pylibbpf.__version__} imported successfully\")'"
+        CIBW_TEST_COMMAND: "python -c 'import pylibbpf; assert hasattr(pylibbpf, \"BpfObject\"), \"BpfObject not found\"; print(f\"pylibbpf {pylibbpf.__version__} OK\")'"
         CIBW_TEST_SKIP: "*-linux_aarch64"
 
         CIBW_MANYLINUX_X86_64_IMAGE: manylinux_2_28
 
         CIBW_BEFORE_ALL_LINUX: |
-          dnf install -y elfutils-libelf-devel zlib-devel
+          dnf install -y elfutils-libelf-devel zlib-devel make gcc gcc-c++ git
+        CIBW_BEFORE_BUILD: >
+          pip install --upgrade "setuptools>=77.0.0" wheel cmake ninja pybind11
 
     - name: Verify clean directory
       run: git diff --exit-code

CMakeLists.txt

@@ -5,12 +5,16 @@ set(CMAKE_CXX_STANDARD 20)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 set(CMAKE_CXX_EXTENSIONS OFF)
 
+find_package(
+  Python
+  COMPONENTS Interpreter Development.Module
+  REQUIRED)
+
 # pybind11
 include_directories(${CMAKE_SOURCE_DIR}/src)
 add_subdirectory(pybind11)
 pybind11_add_module(
   pylibbpf
-
   # Core
   src/core/bpf_program.h
   src/core/bpf_exception.h
@@ -19,18 +23,14 @@ pybind11_add_module(
   src/core/bpf_program.cpp
   src/core/bpf_map.cpp
   src/core/bpf_object.cpp
-
   # Maps
   src/maps/perf_event_array.h
   src/maps/perf_event_array.cpp
-
   # Utils
   src/utils/struct_parser.h
   src/utils/struct_parser.cpp
-
   # Bindings
-  src/bindings/main.cpp
-)
+  src/bindings/main.cpp)
 
 # --- libbpf build rules ---
 set(LIBBPF_SRC_DIR ${CMAKE_CURRENT_SOURCE_DIR}/libbpf/src)

examples/execve.py

@@ -1,10 +1,11 @@
 import time
 from ctypes import c_int32, c_int64, c_uint64, c_void_p
 
-from pylibbpf import BpfMap
 from pythonbpf import BPF, bpf, bpfglobal, map, section
 from pythonbpf.maps import HashMap
 
+from pylibbpf import BpfMap
+
 
 @bpf
 @map

pylibbpf/__init__.py

@@ -0,0 +1,46 @@
+import logging
+
+from .ir_to_ctypes import convert_structs_to_ctypes, is_pythonbpf_structs
+from .pylibbpf import (
+    BpfException,
+    BpfMap,
+    BpfProgram,
+    PerfEventArray,
+    StructParser,
+)
+from .pylibbpf import (
+    BpfObject as _BpfObject,  # C++ object (internal)
+)
+from .wrappers import BpfObjectWrapper
+
+logger = logging.getLogger(__name__)
+
+
+class BpfObject(BpfObjectWrapper):
+    """BpfObject with automatic struct conversion"""
+
+    def __init__(self, object_path: str, structs=None):
+        """Create a BPF object"""
+        if structs is None:
+            structs = {}
+        elif is_pythonbpf_structs(structs):
+            logger.info(f"Auto-converting {len(structs)} PythonBPF structs to ctypes")
+            structs = convert_structs_to_ctypes(structs)
+
+        # Create C++ BpfObject with converted structs
+        cpp_obj = _BpfObject(object_path, structs)
+
+        # Initialize wrapper
+        super().__init__(cpp_obj)
+
+
+__all__ = [
+    "BpfObject",
+    "BpfProgram",
+    "BpfMap",
+    "PerfEventArray",
+    "StructParser",
+    "BpfException",
+]
+
+__version__ = "0.0.6"

pylibbpf/ir_to_ctypes.py

@@ -0,0 +1,104 @@
+import ctypes
+import logging
+
+from llvmlite import ir
+
+logger = logging.getLogger(__name__)
+
+
+def ir_type_to_ctypes(ir_type):
+    """Convert LLVM IR type to ctypes type."""
+    if isinstance(ir_type, ir.IntType):
+        width = ir_type.width
+        type_map = {
+            8: ctypes.c_uint8,
+            16: ctypes.c_uint16,
+            32: ctypes.c_uint32,
+            64: ctypes.c_uint64,
+        }
+        if width not in type_map:
+            raise ValueError(f"Unsupported integer width: {width}")
+        return type_map[width]
+
+    elif isinstance(ir_type, ir.ArrayType):
+        count = ir_type.count
+        element_type_ir = ir_type.element
+
+        if isinstance(element_type_ir, ir.IntType) and element_type_ir.width == 8:
+            # Use c_char for string fields (will have .decode())
+            return ctypes.c_char * count
+        else:
+            element_type = ir_type_to_ctypes(element_type_ir)
+            return element_type * count
+    elif isinstance(ir_type, ir.PointerType):
+        return ctypes.c_void_p
+
+    else:
+        raise TypeError(f"Unsupported IR type: {ir_type}")
+
+
+def _make_repr(struct_name: str, fields: list):
+    """Create a __repr__ function for a struct"""
+
+    def __repr__(self):
+        field_strs = []
+        for field_name, _ in fields:
+            value = getattr(self, field_name)
+            field_strs.append(f"{field_name}={value}")
+        return f"<{struct_name} {' '.join(field_strs)}>"
+
+    return __repr__
+
+
+def convert_structs_to_ctypes(structs_sym_tab) -> dict[str, type[ctypes.Structure]]:
+    """Convert PythonBPF's structs_sym_tab to ctypes.Structure classes."""
+    if not structs_sym_tab:
+        return {}
+
+    ctypes_structs = {}
+
+    for struct_name, struct_type_obj in structs_sym_tab.items():
+        try:
+            fields = []
+            for field_name, field_ir_type in struct_type_obj.fields.items():
+                field_ctypes = ir_type_to_ctypes(field_ir_type)
+                fields.append((field_name, field_ctypes))
+
+            repr_func = _make_repr(struct_name, fields)
+
+            struct_class = type(
+                struct_name,
+                (ctypes.Structure,),
+                {
+                    "_fields_": fields,
+                    "__module__": "pylibbpf.ir_to_ctypes",
+                    "__doc__": f"Auto-generated ctypes structure for {struct_name}",
+                    "__repr__": repr_func,
+                },
+            )
+
+            ctypes_structs[struct_name] = struct_class
+            # Pretty print field info
+            field_info = ", ".join(f"{name}: {typ.__name__}" for name, typ in fields)
+            logger.debug(f"  {struct_name}({field_info})")
+        except Exception as e:
+            logger.error(f"Failed to convert struct '{struct_name}': {e}")
+            raise
+    logger.info(f"Converted struct '{struct_name}' to ctypes")
+    return ctypes_structs
+
+
+def is_pythonbpf_structs(structs) -> bool:
+    """Check if structs dict is from PythonBPF."""
+    if not isinstance(structs, dict) or not structs:
+        return False
+
+    first_value = next(iter(structs.values()))
+    return (
+        hasattr(first_value, "ir_type")
+        and hasattr(first_value, "fields")
+        and hasattr(first_value, "size")
+    )
+
+
+__all__ = ["convert_structs_to_ctypes", "is_pythonbpf_structs"]

pylibbpf/wrappers.py

@@ -0,0 +1,77 @@
+from collections.abc import Callable
+
+
+class PerfEventArrayHelper:
+    """Fluent wrapper for PERF_EVENT_ARRAY maps."""
+
+    def __init__(self, bpf_map):
+        self._map = bpf_map
+        self._perf_buffer = None
+
+    def open_perf_buffer(
+        self,
+        callback: Callable,
+        struct_name: str = "",
+        page_cnt: int = 8,
+        lost_callback: Callable | None = None,
+    ):
+        """Open perf buffer with auto-deserialization."""
+        from .pylibbpf import PerfEventArray
+
+        if struct_name:
+            self._perf_buffer = PerfEventArray(
+                self._map,
+                page_cnt,
+                callback,
+                struct_name,
+                lost_callback or (lambda cpu, cnt: None),
+            )
+        else:
+            self._perf_buffer = PerfEventArray(
+                self._map, page_cnt, callback, lost_callback or (lambda cpu, cnt: None)
+            )
+
+        return self
+
+    def poll(self, timeout_ms: int = -1) -> int:
+        if not self._perf_buffer:
+            raise RuntimeError("Call open_perf_buffer() first")
+        return self._perf_buffer.poll(timeout_ms)
+
+    def consume(self) -> int:
+        if not self._perf_buffer:
+            raise RuntimeError("Call open_perf_buffer() first")
+        return self._perf_buffer.consume()
+
+    def __getattr__(self, name):
+        return getattr(self._map, name)
+
+
+class BpfObjectWrapper:
+    """Smart wrapper that returns map-specific helpers."""
+
+    BPF_MAP_TYPE_PERF_EVENT_ARRAY = 4
+    BPF_MAP_TYPE_RINGBUF = 27
+
+    def __init__(self, bpf_object):
+        self._obj = bpf_object
+        self._map_helpers = {}
+
+    def __getitem__(self, name: str):
+        """Return appropriate helper based on map type."""
+        if name in self._map_helpers:
+            return self._map_helpers[name]
+
+        map_obj = self._obj[name]
+        map_type = map_obj.get_type()
+
+        if map_type == self.BPF_MAP_TYPE_PERF_EVENT_ARRAY:
+            helper = PerfEventArrayHelper(map_obj)
+        else:
+            helper = map_obj
+
+        self._map_helpers[name] = helper
+        return helper
+
+    def __getattr__(self, name):
+        return getattr(self._obj, name)

pyproject.toml

@@ -1,23 +1,24 @@
 [build-system]
 requires = [
-    "setuptools>=42",
+    "setuptools>=77",
     "wheel",
     "ninja",
     "cmake>=4.0",
+    "pybind11>=2.10",
 ]
 build-backend = "setuptools.build_meta"
 
 [project]
 name = "pylibbpf"
-version = "0.0.5"
+version = "0.0.6"
 description = "Python Bindings for Libbpf"
 authors = [
     { name = "r41k0u", email = "pragyanshchaturvedi18@gmail.com" },
     { name = "varun-r-mallya", email = "varunrmallya@gmail.com" }
 ]
 readme = "README.md"
-license = { file = "LICENSE" }
-requires-python = ">=3.8"
+license = "Apache-2.0"
+requires-python = ">=3.12"
 classifiers = [
     "Development Status :: 3 - Alpha",
     "Intended Audience :: Developers",
@@ -28,22 +29,26 @@ classifiers = [
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
     "Programming Language :: C++",
     "Topic :: Software Development :: Libraries :: Python Modules",
     "Topic :: System :: Operating System Kernels :: Linux",
 ]
+dependencies = [
+    "llvmlite>=0.40.0",
+]
 
 [project.optional-dependencies]
 test = ["pytest>=6.0"]
 
 [project.urls]
-Homepage = "https://github.com/varun-r-mallya/pylibbpf"
-Repository = "https://github.com/varun-r-mallya/pylibbpf"
-Issues = "https://github.com/varun-r-mallya/pylibbpf/issues"
+Homepage = "https://github.com/pythonbpf/pylibbpf"
+Repository = "https://github.com/pythonbpf/pylibbpf"
+Issues = "https://github.com/pythonbpf/pylibbpf/issues"
 
 [tool.mypy]
 files = "setup.py"
-python_version = "3.8"
+python_version = "3.12"
 strict = true
 show_error_codes = true
 enable_error_code = ["ignore-without-code", "redundant-expr", "truthy-bool"]
@@ -64,7 +69,7 @@ filterwarnings = [
 testpaths = ["tests"]
 
 [tool.ruff]
-target-version = "py38"
+target-version = "py312"
 line-length = 88
 
 [tool.ruff.lint]
@@ -75,3 +80,7 @@ extend-select = [
     "RUF", # Ruff-specific
     "UP", # pyupgrade
 ]
+
+[tool.setuptools]
+packages = ["pylibbpf"]
+package-data = {"pylibbpf" = ["*.py", "*.so", "*.pyd", "py.typed"]}

setup.py

@@ -6,14 +6,6 @@ from pathlib import Path
 from setuptools import Extension, setup
 from setuptools.command.build_ext import build_ext
 
-# Convert distutils Windows platform specifiers to CMake -A arguments
-PLAT_TO_CMAKE = {
-    "win32": "Win32",
-    "win-amd64": "x64",
-    "win-arm32": "ARM",
-    "win-arm64": "ARM64",
-}
-
 
 # A CMakeExtension needs a sourcedir instead of a file list.
 # The name must be the _single_ output extension from the CMake build.
@@ -45,8 +37,8 @@ class CMakeBuild(build_ext):
         # from Python.
         cmake_args = [
             f"-DCMAKE_LIBRARY_OUTPUT_DIRECTORY={extdir}{os.sep}",
-            f"-DPYTHON_EXECUTABLE={sys.executable}",
             f"-DCMAKE_BUILD_TYPE={cfg}",  # not used on MSVC, but no harm
+            f"-DPython_EXECUTABLE={sys.executable}",
         ]
         build_args = []
 
@@ -122,31 +114,6 @@ if readme_path.exists():
     long_description = readme_path.read_text(encoding="utf-8")
 
 setup(
-    name="pylibbpf",
-    version="0.0.1",
-    author="varun-r-mallya, r41k0u",
-    author_email="varunrmallyagmail.com",
-    description="Python Bindings for Libbpf",
-    long_description=long_description,
-    long_description_content_type="text/markdown",
-    url="https://github.com/varun-r-mallya/pylibbpf",
-    ext_modules=[CMakeExtension("pylibbpf")],
+    ext_modules=[CMakeExtension("pylibbpf.pylibbpf")],
     cmdclass={"build_ext": CMakeBuild},
-    zip_safe=False,
-    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 :: C++",
-        "Topic :: Software Development :: Libraries :: Python Modules",
-        "Topic :: System :: Operating System Kernels :: Linux",
-    ],
-    extras_require={"test": ["pytest>=6.0"]},
-    python_requires=">=3.8",
 )

src/bindings/main.cpp

@@ -2,10 +2,6 @@
 #define STRINGIFY(x) #x
 #define MACRO_STRINGIFY(x) STRINGIFY(x)
 
-extern "C" {
-#include <libbpf.h>
-}
-
 #include "core/bpf_exception.h"
 #include "core/bpf_map.h"
 #include "core/bpf_object.h"
@@ -69,8 +65,13 @@ PYBIND11_MODULE(pylibbpf, m) {
       .def("get_key_size", &BpfMap::get_key_size)
       .def("get_value_size", &BpfMap::get_value_size)
       .def("get_max_entries", &BpfMap::get_max_entries)
+      .def("set_value_struct", &BpfMap::set_value_struct,
+           py::arg("struct_name"))
+      .def("get_value_struct_name", &BpfMap::get_value_struct_name)
+      .def("has_struct_value", &BpfMap::has_struct_value)
       .def("__getitem__", &BpfMap::lookup, py::arg("key"))
-      .def("__setitem__", &BpfMap::update, py::arg("key"), py::arg("value"));
+      .def("__setitem__", &BpfMap::update, py::arg("key"), py::arg("value"))
+      .def("__delitem__", &BpfMap::delete_elem, py::arg("key"));
 
   // StructParser
   py::class_<StructParser>(m, "StructParser")

src/core/bpf_map.cpp

@@ -1,6 +1,10 @@
-#include "bpf_map.h"
-#include "bpf_exception.h"
-#include "bpf_object.h"
+#include "core/bpf_map.h"
+#include "core/bpf_exception.h"
+#include "core/bpf_object.h"
+#include "utils/struct_parser.h"
+#include <algorithm>
+#include <cerrno>
+#include <cstring>
 
 BpfMap::BpfMap(std::shared_ptr<BpfObject> parent, struct bpf_map *raw_map,
                const std::string &map_name)
@@ -22,6 +26,24 @@ BpfMap::BpfMap(std::shared_ptr<BpfObject> parent, struct bpf_map *raw_map,
   value_size_ = bpf_map__value_size(map_);
 }
 
+void BpfMap::set_value_struct(const std::string &struct_name) {
+  auto parent = parent_obj_.lock();
+  if (!parent) {
+    throw BpfException("Parent BpfObject no longer exists");
+  }
+
+  struct_parser_ = parent->get_struct_parser();
+  if (!struct_parser_) {
+    throw BpfException("No struct definitions available in BpfObject");
+  }
+
+  if (!struct_parser_->has_struct(struct_name)) {
+    throw BpfException("Unknown struct: " + struct_name);
+  }
+
+  value_struct_name_ = struct_name;
+}
+
 py::object BpfMap::lookup(const py::object &key) const {
   if (map_fd_ < 0)
     throw BpfException("Map '" + map_name_ + "' is not initialized properly");
@@ -39,7 +61,7 @@ py::object BpfMap::lookup(const py::object &key) const {
                                        value_span.data(), value_size_, BPF_ANY);
   if (ret < 0) {
     if (ret == -ENOENT)
-      throw py::key_error("Key not found in map '" + map_name_ + "'");
+      return py::none();
     throw BpfException("Failed to lookup key in map '" + map_name_ +
                        "': " + std::strerror(-ret));
   }
@@ -212,7 +234,13 @@ void BpfMap::python_to_bytes_inplace(const py::object &obj,
   }
 }
 
-py::object BpfMap::bytes_to_python(std::span<const uint8_t> data) {
+py::object BpfMap::bytes_to_python(std::span<const uint8_t> data) const {
+  //  NOTE: Struct parsing for value type
+  if (struct_parser_ && !value_struct_name_.empty()) {
+    py::bytes py_data(reinterpret_cast<const char *>(data.data()), data.size());
+    return struct_parser_->parse(value_struct_name_, py_data);
+  }
+
   if (data.size() == 4) {
     uint32_t value;
     std::memcpy(&value, data.data(), 4);

src/core/bpf_map.h

@@ -1,10 +1,7 @@
 #ifndef PYLIBBPF_BPF_MAP_H
 #define PYLIBBPF_BPF_MAP_H
 
-#include <algorithm>
 #include <array>
-#include <cerrno>
-#include <cstring>
 #include <libbpf.h>
 #include <pybind11/pybind11.h>
 #include <span>
@@ -12,6 +9,7 @@
 #include <vector>
 
 class BpfObject;
+class StructParser;
 
 namespace py = pybind11;
 
@@ -23,6 +21,11 @@ private:
   std::string map_name_;
   __u32 key_size_, value_size_;
 
+  //  TODO: For now, we'll only support struct parsing for value types
+  // later we can extend this to keys
+  std::shared_ptr<StructParser> struct_parser_;
+  std::string value_struct_name_;
+
   template <size_t StackSize = 64> struct BufferManager {
     std::array<uint8_t, StackSize> stack_buf;
     std::vector<uint8_t> heap_buf;
@@ -55,6 +58,7 @@ public:
   py::dict items() const;
   py::list keys() const;
   py::list values() const;
+  void set_value_struct(const std::string &struct_name);
 
   [[nodiscard]] std::string get_name() const { return map_name_; }
   [[nodiscard]] int get_fd() const { return map_fd_; }
@@ -65,11 +69,17 @@ public:
   [[nodiscard]] std::shared_ptr<BpfObject> get_parent() const {
     return parent_obj_.lock();
   }
+  [[nodiscard]] std::string get_value_struct_name() const {
+    return value_struct_name_;
+  }
+  [[nodiscard]] bool has_struct_value() const {
+    return !value_struct_name_.empty();
+  }
 
 private:
   static void python_to_bytes_inplace(const py::object &obj,
                                       std::span<uint8_t> buffer);
-  static py::object bytes_to_python(std::span<const uint8_t> data);
+  py::object bytes_to_python(std::span<const uint8_t> data) const;
 };
 
-#endif // PYLIBBPF_MAPS_H
+#endif // PYLIBBPF_BPF_MAP_H

src/core/bpf_object.cpp

@@ -1,9 +1,11 @@
-#include "bpf_object.h"
-#include "bpf_exception.h"
-#include "bpf_map.h"
-#include "bpf_program.h"
+#include "core/bpf_object.h"
+#include "core/bpf_exception.h"
+#include "core/bpf_map.h"
+#include "core/bpf_program.h"
 #include "utils/struct_parser.h"
 #include <cerrno>
+#include <cstring>
+#include <utility>
 
 BpfObject::BpfObject(std::string object_path, py::dict structs)
     : obj_(nullptr), object_path_(std::move(object_path)), loaded_(false),
@@ -22,9 +24,13 @@ BpfObject::~BpfObject() {
 }
 
 BpfObject::BpfObject(BpfObject &&other) noexcept
-    : obj_(other.obj_), object_path_(std::move(other.object_path_)),
-      loaded_(other.loaded_), prog_cache_(std::move(other.prog_cache_)),
-      maps_cache_(std::move(other.maps_cache_)) {
+    : obj_(std::exchange(other.obj_, nullptr)),
+      object_path_(std::move(other.object_path_)),
+      loaded_(std::exchange(other.loaded_, false)),
+      maps_cache_(std::move(other.maps_cache_)),
+      prog_cache_(std::move(other.prog_cache_)),
+      struct_defs_(std::move(other.struct_defs_)),
+      struct_parser_(std::move(other.struct_parser_)) {
 
   other.obj_ = nullptr;
   other.loaded_ = false;
@@ -38,14 +44,13 @@ BpfObject &BpfObject::operator=(BpfObject &&other) noexcept {
       bpf_object__close(obj_);
     }
 
-    obj_ = other.obj_;
+    obj_ = std::exchange(other.obj_, nullptr);
     object_path_ = std::move(other.object_path_);
-    loaded_ = other.loaded_;
-    prog_cache_ = std::move(other.prog_cache_);
+    loaded_ = std::exchange(other.loaded_, false);
     maps_cache_ = std::move(other.maps_cache_);
-
-    other.obj_ = nullptr;
-    other.loaded_ = false;
+    prog_cache_ = std::move(other.prog_cache_);
+    struct_defs_ = std::move(other.struct_defs_);
+    struct_parser_ = std::move(other.struct_parser_);
   }
   return *this;
 }
@@ -259,9 +264,9 @@ py::dict BpfObject::get_cached_maps() const {
 }
 
 std::shared_ptr<StructParser> BpfObject::get_struct_parser() const {
-    if (!struct_parser_ && !struct_defs_.empty()) {
-        // Create parser on first access
-        struct_parser_ = std::make_shared<StructParser>(struct_defs_);
-    }
-    return struct_parser_;
+  if (!struct_parser_ && !struct_defs_.empty()) {
+    // Create parser on first access
+    struct_parser_ = std::make_shared<StructParser>(struct_defs_);
+  }
+  return struct_parser_;
 }

src/core/bpf_object.h

@@ -6,7 +6,6 @@
 #include <pybind11/pybind11.h>
 #include <string>
 #include <unordered_map>
-#include <vector>
 
 namespace py = pybind11;
 

src/core/bpf_program.cpp

@@ -1,7 +1,8 @@
-#include "bpf_program.h"
-#include "bpf_exception.h"
-#include "bpf_object.h"
+#include "core/bpf_program.h"
+#include "core/bpf_exception.h"
+#include "core/bpf_object.h"
 #include <cerrno>
+#include <cstring>
 #include <utility>
 
 BpfProgram::BpfProgram(std::shared_ptr<BpfObject> parent,

src/core/bpf_program.h

@@ -1,7 +1,6 @@
 #ifndef PYLIBBPF_BPF_PROGRAM_H
 #define PYLIBBPF_BPF_PROGRAM_H
 
-#include <cstring>
 #include <libbpf.h>
 #include <memory>
 #include <string>

src/maps/perf_event_array.cpp

@@ -1,13 +1,15 @@
-#include "perf_event_array.h"
+#include "maps/perf_event_array.h"
 #include "core/bpf_exception.h"
 #include "core/bpf_map.h"
 #include "core/bpf_object.h"
 #include "utils/struct_parser.h"
+#include <cerrno>
+#include <cstring>
 
 PerfEventArray::PerfEventArray(std::shared_ptr<BpfMap> map, int page_cnt,
                                py::function callback, py::object lost_callback)
     : map_(map), pb_(nullptr), callback_(std::move(callback)),
-      lost_callback_(lost_callback) {
+      lost_callback_(std::move(lost_callback)) {
 
   if (map->get_type() != BPF_MAP_TYPE_PERF_EVENT_ARRAY) {
     throw BpfException("Map '" + map->get_name() +
@@ -81,7 +83,6 @@ void PerfEventArray::sample_callback_wrapper(void *ctx, int cpu, void *data,
   } catch (const py::error_already_set &e) {
     PyErr_Print();
   } catch (const std::exception &e) {
-    py::gil_scoped_acquire acquire;
     py::print("C++ error in perf callback:", e.what());
   }
 }
@@ -90,14 +91,15 @@ void PerfEventArray::lost_callback_wrapper(void *ctx, int cpu,
                                            unsigned long long cnt) {
   auto *self = static_cast<PerfEventArray *>(ctx);
 
-  if (self->lost_callback_.is_none()) {
-    return;
-  }
-
   py::gil_scoped_acquire acquire;
 
   try {
-    self->lost_callback_(cpu, cnt);
+    if (!self->lost_callback_.is_none()) {
+      py::function lost_fn = py::cast<py::function>(self->lost_callback_);
+      lost_fn(cpu, cnt);
+    } else {
+      py::print("Lost", cnt, "events on CPU", cpu);
+    }
   } catch (const py::error_already_set &e) {
     PyErr_Print();
   }

src/maps/perf_event_array.h

@@ -2,7 +2,7 @@
 #define PYLIBBPF_PERF_EVENT_ARRAY_H
 
 #include <libbpf.h>
-#include <pybind11/functional.h>
+#include <memory>
 #include <pybind11/pybind11.h>
 #include <string>
 
@@ -16,7 +16,7 @@ private:
   std::shared_ptr<BpfMap> map_;
   struct perf_buffer *pb_;
   py::function callback_;
-  py::function lost_callback_;
+  py::object lost_callback_;
 
   std::shared_ptr<StructParser> parser_;
   std::string struct_name_;

tests/test_basic.py

@@ -2,6 +2,6 @@ import pylibbpf as m
 
 
 def test_main():
-    assert m.__version__ == "0.0.5"
-    prog = m.BpfObject("tests/execve2.o")
+    assert m.__version__ == "0.0.6"
+    prog = m.BpfObject("tests/execve2.o", structs={})
     print(prog)