https://github.com/python/cpython/commit/f4c9f391650ebca213905c1308f87abac670033e
commit: f4c9f391650ebca213905c1308f87abac670033e
branch: 3.12
author: Victor Stinner <[email protected]>
committer: vstinner <[email protected]>
date: 2024-11-28T13:57:35Z
summary:
[3.12] gh-123967: Fix faulthandler for trampoline frames (#127329) (#127363)
gh-123967: Fix faulthandler for trampoline frames (#127329)
If the top-most frame is a trampoline frame, skip it.
(cherry picked from commit 58e334e1431b2ed6b70ee42501ea73e08084e769)
files:
A Misc/NEWS.d/next/Library/2024-11-27-14-06-35.gh-issue-123967.wxUmnW.rst
M Python/traceback.c
diff --git
a/Misc/NEWS.d/next/Library/2024-11-27-14-06-35.gh-issue-123967.wxUmnW.rst
b/Misc/NEWS.d/next/Library/2024-11-27-14-06-35.gh-issue-123967.wxUmnW.rst
new file mode 100644
index 00000000000000..788fe0c78ef257
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2024-11-27-14-06-35.gh-issue-123967.wxUmnW.rst
@@ -0,0 +1,2 @@
+Fix faulthandler for trampoline frames. If the top-most frame is a
+trampoline frame, skip it. Patch by Victor Stinner.
diff --git a/Python/traceback.c b/Python/traceback.c
index fdaf19d37074dd..fba3594e97ceac 100644
--- a/Python/traceback.c
+++ b/Python/traceback.c
@@ -1242,6 +1242,8 @@ _Py_DumpASCII(int fd, PyObject *text)
static void
dump_frame(int fd, _PyInterpreterFrame *frame)
{
+ assert(frame->owner != FRAME_OWNED_BY_CSTACK);
+
PyCodeObject *code = frame->f_code;
PUTS(fd, " File ");
if (code->co_filename != NULL
@@ -1315,24 +1317,27 @@ 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) {
PUTS(fd, " ...\n");
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++;
}
}
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