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gh-138122: Don't sample partial frame chains (#141912)

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Pablo Galindo Salgado 2025-12-07 15:53:48 +00:00 • committed by GitHub
parent c5b37228af
commit d6d850df89
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13 changed files with 135 additions and 105 deletions
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5
Modules/_remote_debugging/threads.c
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@ -380,6 +380,7 @@ unwind_stack_for_thread(
}
uintptr_t frame_addr = GET_MEMBER(uintptr_t, ts, unwinder->debug_offsets.thread_state.current_frame);
uintptr_t base_frame_addr = GET_MEMBER(uintptr_t, ts, unwinder->debug_offsets.thread_state.base_frame);
frame_info = PyList_New(0);
if (!frame_info) {
@ -411,9 +412,9 @@ unwind_stack_for_thread(
PyErr_Clear(); // Non-fatal
}
} else {
// No caching - process entire frame chain
// No caching - process entire frame chain with base_frame validation
if (process_frame_chain(unwinder, frame_addr, &chunks, frame_info,
gc_frame, 0, NULL, NULL, NULL, 0) < 0) {
base_frame_addr, gc_frame, 0, NULL, NULL, NULL, 0) < 0) {
set_exception_cause(unwinder, PyExc_RuntimeError, "Failed to process frame chain");
goto error;
}