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implement arena exclusive heap allocation for dev

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daanx 2023-04-04 15:40:06 -07:00
parent 4fc597d4f4
commit 461df1e878
6 changed files with 54 additions and 22 deletions
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15
src/heap.c
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@ -198,15 +198,16 @@ mi_heap_t* mi_heap_get_backing(void) {
return bheap;
}
mi_decl_nodiscard mi_heap_t* mi_heap_new(void) {
mi_decl_nodiscard mi_heap_t* mi_heap_new_in_arena(mi_arena_id_t arena_id) {
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;
if (heap == NULL) return NULL;
_mi_memcpy_aligned(heap, &_mi_heap_empty, sizeof(mi_heap_t));
heap->tld = bheap->tld;
heap->thread_id = _mi_thread_id();
heap->arena_id = arena_id;
_mi_random_split(&bheap->random, &heap->random);
heap->cookie = _mi_heap_random_next(heap) | 1;
heap->cookie = _mi_heap_random_next(heap) | 1;
heap->keys[0] = _mi_heap_random_next(heap);
heap->keys[1] = _mi_heap_random_next(heap);
heap->no_reclaim = true; // don't reclaim abandoned pages or otherwise destroy is unsafe
@ -216,6 +217,14 @@ mi_decl_nodiscard mi_heap_t* mi_heap_new(void) {
return heap;
}
mi_decl_nodiscard mi_heap_t* mi_heap_new(void) {
return mi_heap_new_in_arena(_mi_arena_id_none());
}
bool _mi_heap_memid_is_suitable(mi_heap_t* heap, size_t memid) {
return _mi_arena_memid_is_suitable(memid, heap->arena_id);
}
uintptr_t _mi_heap_random_next(mi_heap_t* heap) {
return _mi_random_next(&heap->random);
}