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GH-139193: Fix dump_stack when PYTHON_LLTRACE=4 #139384

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GH-139193: Fix dump_stack when PYTHON_LLTRACE=4 #139384

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e0ff9f8
Fix PyStackRef_IsError for gil-enabled build
sergey-miryanov Sep 27, 2025
0780c36
Fix dump_item to check is the item valid or no
sergey-miryanov Sep 27, 2025
58b4564
Fix PyStackRef_IsValid accordingly
sergey-miryanov Sep 28, 2025
86be53d
Revert "Fix PyStackRef_IsValid accordingly"
sergey-miryanov Sep 28, 2025
053ee09
Revert "Fix PyStackRef_IsError for gil-enabled build"
sergey-miryanov Oct 4, 2025
93be070
Merge branch 'main' into 139193-fix-dump-stack
sergey-miryanov Oct 7, 2025
d4f2c37
Add PyStackRef_IsMalformed
sergey-miryanov Oct 7, 2025
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6 changes: 6 additions & 0 deletions Include/internal/pycore_stackref.h
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Original file line number Diff line number Diff line change
Expand Up @@ -296,6 +296,12 @@ PyStackRef_IsError(_PyStackRef ref)
return ref.bits == Py_TAG_INVALID;
}

static inline bool
PyStackRef_IsMalformed(_PyStackRef ref)
{
return (ref.bits & Py_TAG_BITS) == Py_TAG_INVALID;
}

static inline bool
PyStackRef_IsValid(_PyStackRef ref)
{
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4 changes: 4 additions & 0 deletions Python/ceval.c
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Original file line number Diff line number Diff line change
Expand Up @@ -160,6 +160,10 @@ dump_item(_PyStackRef item)
printf("<NULL>");
return;
}
if (PyStackRef_IsMalformed(item)) {
printf("<INVALID>");
return;
}
if (PyStackRef_IsTaggedInt(item)) {
printf("%" PRId64, (int64_t)PyStackRef_UntagInt(item));
return;
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