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limit memcpy as rep stosb to windows where the cpu supporst FSRM; add mi_memcpy_aligned for machine-word aligned copy. see issue #201 and pr #253

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This commit is contained in:
Daan Leijen 2021-01-30 14:33:46 -08:00
parent 92ec493a5d
commit 35c1fc2be9
6 changed files with 77 additions and 24 deletions
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4
src/heap.c
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@ -193,7 +193,7 @@ mi_heap_t* mi_heap_new(void) {
mi_heap_t* bheap = mi_heap_get_backing();
mi_heap_t* heap = mi_heap_malloc_tp(bheap, mi_heap_t); // todo: OS allocate in secure mode?
if (heap==NULL) return NULL;
_mi_memcpy(heap, &_mi_heap_empty, sizeof(mi_heap_t));
_mi_memcpy_aligned(heap, &_mi_heap_empty, sizeof(mi_heap_t));
heap->tld = bheap->tld;
heap->thread_id = _mi_thread_id();
_mi_random_split(&bheap->random, &heap->random);
@ -220,7 +220,7 @@ static void mi_heap_reset_pages(mi_heap_t* heap) {
#ifdef MI_MEDIUM_DIRECT
memset(&heap->pages_free_medium, 0, sizeof(heap->pages_free_medium));
#endif
_mi_memcpy(&heap->pages, &_mi_heap_empty.pages, sizeof(heap->pages));
_mi_memcpy_aligned(&heap->pages, &_mi_heap_empty.pages, sizeof(heap->pages));
heap->thread_delayed_free = NULL;
heap->page_count = 0;
}