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Added MREMAP_MAYMOVE flag to mremap to ensure similar to realloc behavior

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This commit is contained in:
Egor Sheremetov 2023-03-27 10:30:06 +02:00
parent 113c57e7c8
commit 3826c8dd32
1 changed files with 9 additions and 2 deletions
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11
runtime/gc.c
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@ -50,6 +50,8 @@ void* gc_alloc(size_t size) {
// compact phase
compact(size);
return gc_alloc_on_existing_heap(size);
}
void compact(size_t additional_size) {
@ -58,14 +60,19 @@ void compact(size_t additional_size) {
size_t next_heap_size = MAX(live_size * EXTRA_ROOM_HEAP_COEFFICIENT + additional_size, MINIMUM_HEAP_CAPACITY);
memory_chunk new_memory;
new_memory.begin = mremap(heap.begin, WORDS_TO_BYTES(heap.size), WORDS_TO_BYTES(next_heap_size), 0);
new_memory.begin = mremap(
heap.begin,
WORDS_TO_BYTES(heap.size),
WORDS_TO_BYTES(next_heap_size),
MREMAP_MAYMOVE
);
if (new_memory.begin == MAP_FAILED) {
perror ("ERROR: compact: mremap failed\n");
exit (1);
}
new_memory.end = new_memory.begin + next_heap_size;
new_memory.size = next_heap_size;
new_memory.current = new_memory.begin + live_size + additional_size;
new_memory.current = new_memory.begin + live_size;
update_references(&new_memory);
physically_relocate(&new_memory);