starnakin/42_malloc
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fix: write correctly prev and next block on deletion

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This commit is contained in:
starnakin 2024-07-30 11:33:42 +02:00
parent 290a120319
commit 98a5e989c2
2 changed files with 25 additions and 10 deletions
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30
src/chunk_manager.c
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@ -43,21 +43,35 @@ int chunk_split(chunk_t *chunk, chunk_t *new_chunk, size_t new_size)
void destroy_chunk(chunk_t *chunk)
{
chunk_t chunk_next_to;
chunk_t chunk_prev, chunk_next, *first_chunk = chunk, *last_chunk = chunk;
if (chunk->prev != NULL)
{
chunk_read(chunk->prev, &chunk_next_to);
if (chunk_next_to.block_id == chunk->block_id && chunk_next_to.is_used == false)
chunk_merge(&chunk_next_to, chunk);
*chunk = chunk_next_to;
chunk_read(chunk->prev, &chunk_prev);
if (chunk_prev.block_id == chunk->block_id && chunk_prev.is_used == false)
chunk_merge(&chunk_prev, chunk);
first_chunk = &chunk_prev;
}
if (chunk->next != NULL)
{
chunk_read(chunk->next, &chunk_next_to);
if (chunk_next_to.block_id == chunk->block_id && chunk_next_to.is_used == false)
chunk_merge(chunk, &chunk_next_to);
chunk_read(chunk->next, &chunk_next);
if (chunk_next.block_id == chunk->block_id && chunk_next.is_used == false)
chunk_merge(chunk, &chunk_next);
last_chunk = &chunk_next;
}
if (last_chunk != chunk)
{
last_chunk->prev = chunk->prev;
chunk_write(last_chunk);
}
chunk->is_used = false;
chunk_write(chunk);
if (first_chunk != chunk)
{
first_chunk->next = chunk->next;
chunk_write(first_chunk);
}
}

5
test/main.c
View File

@ -33,6 +33,7 @@ int main(int ac, char **av)
test(NULL, allocs_tree[LARGE], "alloc free", "simple alloc, simple free");
ptr = ft_malloc(10000000);
test(ptr, ((void **) allocs_tree[LARGE])[CHUNK_DATA_START_POS], "free alloc", "alloc after a free on the first block");
ft_free(ptr);
void *ptr1 = ft_malloc(10000000);
void *ptr2 = ft_malloc(10000000);
void *ptr3 = ft_malloc(10000000);
@ -42,9 +43,9 @@ int main(int ac, char **av)
ft_free(ptr1);
test(NOT_NULL, raw_get_chunk(allocs_tree[LARGE], ptr2), "free disorder1", "");
ft_free(ptr3);
test(NOT_NULL, raw_get_chunk(allocs_tree[LARGE], ptr2), "free disorder1", "");
test(NOT_NULL, raw_get_chunk(allocs_tree[LARGE], ptr2), "free disorder2", "");
ft_free(ptr2);
test(NULL, allocs_tree[LARGE], "free disorder1", "");
test(NULL, allocs_tree[LARGE], "free disorder3", "");
return 0;
}