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GH-126910: Add gdb support for unwinding JIT frames#146071

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diegorusso wants to merge 6 commits intopython:mainfrom
diegorusso:add-gdb-support
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GH-126910: Add gdb support for unwinding JIT frames#146071
diegorusso wants to merge 6 commits intopython:mainfrom
diegorusso:add-gdb-support

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@diegorusso diegorusso commented Mar 17, 2026 •
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The PR adds the support to GDB for unwinding JIT frames by emitting eh frames.
It reuses part of the existent infrastructure for the perf_jit from @pablogsal.

This is part of the overall plan laid out here: #126910 (comment)

The output in GDB looks like:

Program received signal SIGINT, Interrupt.
0x0000fffff7fb50f8 in py::jit_executor:<jit> ()
(gdb) bt
#0  0x0000fffff7fb50f8 in py::jit_executor:<jit> ()
#1  0x0000fffff7fb4050 in py::jit_shim:<jit> ()
#2  0x0000aaaaaad5e314 in _PyEval_EvalFrameDefault (tstate=0xfffff7fb80f0, frame=0xfffff774bab0, throwflag=6, throwflag@entry=0)
    at ../../Python/generated_cases.c.h:5711
#3  0x0000aaaaaad61350 in _PyEval_EvalFrame (tstate=0xaaaaab1d57b0 <_PyRuntime+344632>, frame=0xfffff7fb8020, throwflag=0)
    at ../../Include/internal/pycore_ceval.h:122
...

@bedevere-app bedevere-app bot mentioned this pull request Mar 17, 2026
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@diegorusso diegorusso requested a review from pablogsal March 17, 2026 16:40
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