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| author | Sam Gross <colesbury@gmail.com> | 2024-01-16 21:42:15 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2024-01-16 21:42:15 (GMT) |
| commit | b331381485c1965d1c88b7aee7ae9604aca05758 (patch) | |
| tree | 17595ab4ee790ebb042c5a9661848623fb79076e /Objects | |
| parent | c86571e4c9765a88ba05a7d9b874b40af0e1d6ab (diff) | |
| download | cpython-b331381485c1965d1c88b7aee7ae9604aca05758.zip cpython-b331381485c1965d1c88b7aee7ae9604aca05758.tar.gz cpython-b331381485c1965d1c88b7aee7ae9604aca05758.tar.bz2 | |
gh-112529: Track if debug allocator is used as underlying allocator (#113747)
* gh-112529: Track if debug allocator is used as underlying allocator
The GC implementation for free-threaded builds will need to accurately
detect if the debug allocator is used because it affects the offset of
the Python object from the beginning of the memory allocation. The
current implementation of `_PyMem_DebugEnabled` only considers if the
debug allocator is the outer-most allocator; it doesn't handle the case
of "hooks" like tracemalloc being used on top of the debug allocator.
This change enables more accurate detection of the debug allocator by
tracking when debug hooks are enabled.
* Simplify _PyMem_DebugEnabled
Diffstat (limited to 'Objects')
| -rw-r--r-- | Objects/obmalloc.c | 21 |
1 files changed, 15 insertions, 6 deletions
diff --git a/Objects/obmalloc.c b/Objects/obmalloc.c index 88ad305..16d5bcb 100644 --- a/Objects/obmalloc.c +++ b/Objects/obmalloc.c @@ -439,12 +439,14 @@ set_up_allocators_unlocked(PyMemAllocatorName allocator) (void)set_default_allocator_unlocked(PYMEM_DOMAIN_RAW, pydebug, NULL); (void)set_default_allocator_unlocked(PYMEM_DOMAIN_MEM, pydebug, NULL); (void)set_default_allocator_unlocked(PYMEM_DOMAIN_OBJ, pydebug, NULL); + _PyRuntime.allocators.is_debug_enabled = pydebug; break; case PYMEM_ALLOCATOR_DEBUG: (void)set_default_allocator_unlocked(PYMEM_DOMAIN_RAW, 1, NULL); (void)set_default_allocator_unlocked(PYMEM_DOMAIN_MEM, 1, NULL); (void)set_default_allocator_unlocked(PYMEM_DOMAIN_OBJ, 1, NULL); + _PyRuntime.allocators.is_debug_enabled = 1; break; #ifdef WITH_PYMALLOC @@ -458,7 +460,9 @@ set_up_allocators_unlocked(PyMemAllocatorName allocator) set_allocator_unlocked(PYMEM_DOMAIN_MEM, &pymalloc); set_allocator_unlocked(PYMEM_DOMAIN_OBJ, &pymalloc); - if (allocator == PYMEM_ALLOCATOR_PYMALLOC_DEBUG) { + int is_debug = (allocator == PYMEM_ALLOCATOR_PYMALLOC_DEBUG); + _PyRuntime.allocators.is_debug_enabled = is_debug; + if (is_debug) { set_up_debug_hooks_unlocked(); } break; @@ -477,7 +481,9 @@ set_up_allocators_unlocked(PyMemAllocatorName allocator) PyMemAllocatorEx objmalloc = MIMALLOC_OBJALLOC; set_allocator_unlocked(PYMEM_DOMAIN_OBJ, &objmalloc); - if (allocator == PYMEM_ALLOCATOR_MIMALLOC_DEBUG) { + int is_debug = (allocator == PYMEM_ALLOCATOR_MIMALLOC_DEBUG); + _PyRuntime.allocators.is_debug_enabled = is_debug; + if (is_debug) { set_up_debug_hooks_unlocked(); } @@ -493,7 +499,9 @@ set_up_allocators_unlocked(PyMemAllocatorName allocator) set_allocator_unlocked(PYMEM_DOMAIN_MEM, &malloc_alloc); set_allocator_unlocked(PYMEM_DOMAIN_OBJ, &malloc_alloc); - if (allocator == PYMEM_ALLOCATOR_MALLOC_DEBUG) { + int is_debug = (allocator == PYMEM_ALLOCATOR_MALLOC_DEBUG); + _PyRuntime.allocators.is_debug_enabled = is_debug; + if (is_debug) { set_up_debug_hooks_unlocked(); } break; @@ -604,13 +612,13 @@ _PyMem_GetCurrentAllocatorName(void) } -#ifdef WITH_PYMALLOC -static int +int _PyMem_DebugEnabled(void) { - return (_PyObject.malloc == _PyMem_DebugMalloc); + return _PyRuntime.allocators.is_debug_enabled; } +#ifdef WITH_PYMALLOC static int _PyMem_PymallocEnabled(void) { @@ -695,6 +703,7 @@ set_up_debug_hooks_unlocked(void) set_up_debug_hooks_domain_unlocked(PYMEM_DOMAIN_RAW); set_up_debug_hooks_domain_unlocked(PYMEM_DOMAIN_MEM); set_up_debug_hooks_domain_unlocked(PYMEM_DOMAIN_OBJ); + _PyRuntime.allocators.is_debug_enabled = 1; } void |