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gh-123967: Fix faulthandler for trampoline frames (#127329)

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If the top-most frame is a trampoline frame, skip it.
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Victor Stinner 2024-11-27 16:14:49 +01:00 committed by GitHub
parent 9328db7652
commit 58e334e143
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GPG Key ID: B5690EEEBB952194
2 changed files with 16 additions and 9 deletions
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2
Misc/NEWS.d/next/Library/2024-11-27-14-06-35.gh-issue-123967.wxUmnW.rst Normal file
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@ -0,0 +1,2 @@
Fix faulthandler for trampoline frames. If the top-most frame is a
trampoline frame, skip it. Patch by Victor Stinner.

23
Python/traceback.c
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@ -890,6 +890,8 @@ done:
static void
dump_frame(int fd, _PyInterpreterFrame *frame)
{
assert(frame->owner != FRAME_OWNED_BY_CSTACK);
PyCodeObject *code =_PyFrame_GetCode(frame);
PUTS(fd, " File ");
if (code->co_filename != NULL
@ -963,6 +965,17 @@ dump_traceback(int fd, PyThreadState *tstate, int write_header)
unsigned int depth = 0;
while (1) {
if (frame->owner == FRAME_OWNED_BY_CSTACK) {
/* Trampoline frame */
frame = frame->previous;
if (frame == NULL) {
break;
}
/* Can't have more than one shim frame in a row */
assert(frame->owner != FRAME_OWNED_BY_CSTACK);
}
if (MAX_FRAME_DEPTH <= depth) {
if (MAX_FRAME_DEPTH < depth) {
PUTS(fd, "plus ");
@ -971,20 +984,12 @@ dump_traceback(int fd, PyThreadState *tstate, int write_header)
}
break;
}
dump_frame(fd, frame);
frame = frame->previous;
if (frame == NULL) {
break;
}
if (frame->owner == FRAME_OWNED_BY_CSTACK) {
/* Trampoline frame */
frame = frame->previous;
}
if (frame == NULL) {
break;
}
/* Can't have more than one shim frame in a row */
assert(frame->owner != FRAME_OWNED_BY_CSTACK);
depth++;
}
}