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use atomic read/write on the page->heap field where concurrent interaction is possible

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This commit is contained in:
Daan Leijen 2019-11-20 13:19:17 -08:00
parent 94bfb47725
commit 4d4a2885f5
3 changed files with 18 additions and 11 deletions
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2
src/alloc.c
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@ -235,7 +235,7 @@ static mi_decl_noinline void _mi_free_block_mt(mi_page_t* page, mi_block_t* bloc
}
else {
// racy read on `heap`, but ok because MI_DELAYED_FREEING is set (see `mi_heap_delete` and `mi_heap_collect_abandon`)
mi_heap_t* heap = page->heap;
mi_heap_t* heap = (mi_heap_t*)mi_atomic_read_ptr(mi_atomic_cast(void*, &page->heap));
mi_assert_internal(heap != NULL);
if (heap != NULL) {
// add to the delayed free list of this heap. (do this atomically as the lock only protects heap memory validity)