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fix context debug info repetition circular reference error

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varun-r-mallya
2025-11-05 17:44:29 +05:30
parent 2685d0a0ee
commit 44c6ceda27
2 changed files with 17 additions and 7 deletions
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11
pythonbpf/functions/function_debug_info.py
View File

@ -49,16 +49,27 @@ def generate_function_debug_info(
"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
)

13
tests/failing_tests/vmlinux/i32_test.py
View File

@ -3,6 +3,12 @@ from pythonbpf import bpf, section, bpfglobal, compile_to_ir, compile
from vmlinux import struct_xdp_md
from vmlinux import XDP_PASS
@bpf
@section("xdp")
def print_xdp_dat2a(ct2x: struct_xdp_md) -> c_int64:
data = ct2x.data # 32-bit field: packet start pointer
print(f"ct2x->data = {data}")
return c_int64(XDP_PASS)
@bpf
@section("xdp")
@ -12,13 +18,6 @@ def print_xdp_data(ctx: struct_xdp_md) -> c_int64:
print(f"ctx->data = {something}")
return c_int64(XDP_PASS)
@bpf
@section("xdp")
def print_xdp_dat2a(ct2x: struct_xdp_md) -> c_int64:
data = ct2x.data # 32-bit field: packet start pointer
print(f"ct2x->data = {data}")
return c_int64(XDP_PASS)
@bpf
@bpfglobal
def LICENSE() -> str: