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gh-115184: Fix refleak tracking issues in free-threaded build (#115188)

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Fixes a few issues related to refleak tracking in the free-threaded build:

- Count blocks in abandoned segments
- Call `_mi_page_free_collect` earlier during heap traversal in order to get an accurate count of blocks in use.
- Add missing refcount tracking in `_Py_DecRefSharedDebug` and `_Py_ExplicitMergeRefcount`.
- Pause threads in  `get_num_global_allocated_blocks` to ensure that traversing the mimalloc heaps is safe.
This commit is contained in:
Sam Gross 2024-02-09 09:23:12 -05:00 • committed by GitHub
parent 769d444826
commit 31633f4473
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3 changed files with 16 additions and 6 deletions
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Objects/mimalloc/heap.c
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@ -538,7 +538,6 @@ bool _mi_heap_area_visit_blocks(const mi_heap_area_t* area, mi_page_t *page, mi_
mi_assert(page != NULL);
if (page == NULL) return true;
_mi_page_free_collect(page,true);
mi_assert_internal(page->local_free == NULL);
if (page->used == 0) return true;
@ -635,6 +634,7 @@ bool _mi_heap_area_visit_blocks(const mi_heap_area_t* area, mi_page_t *page, mi_
typedef bool (mi_heap_area_visit_fun)(const mi_heap_t* heap, const mi_heap_area_ex_t* area, void* arg);
void _mi_heap_area_init(mi_heap_area_t* area, mi_page_t* page) {
_mi_page_free_collect(page,true);
const size_t bsize = mi_page_block_size(page);
const size_t ubsize = mi_page_usable_block_size(page);
area->reserved = page->reserved * bsize;