diff options
Diffstat (limited to 'py/gc.c')
| -rw-r--r-- | py/gc.c | 8 |
1 files changed, 4 insertions, 4 deletions
@@ -409,12 +409,12 @@ found: void *ret_ptr = (void*)(MP_STATE_MEM(gc_pool_start) + start_block * BYTES_PER_BLOCK); DEBUG_printf("gc_alloc(%p)\n", ret_ptr); - // zero out the additional bytes of the newly allocated blocks + // Zero out all the bytes of the newly allocated blocks. // This is needed because the blocks may have previously held pointers // to the heap and will not be set to something else if the caller // doesn't actually use the entire block. As such they will continue // to point to the heap and may prevent other blocks from being reclaimed. - memset((byte*)ret_ptr + n_bytes, 0, (end_block - start_block + 1) * BYTES_PER_BLOCK - n_bytes); + memset((byte*)ret_ptr, 0, (end_block - start_block + 1) * BYTES_PER_BLOCK); #if MICROPY_ENABLE_FINALISER if (has_finaliser) { @@ -620,8 +620,8 @@ void *gc_realloc(void *ptr_in, size_t n_bytes, bool allow_move) { ATB_FREE_TO_TAIL(bl); } - // zero out the additional bytes of the newly allocated blocks (see comment above in gc_alloc) - memset((byte*)ptr_in + n_bytes, 0, new_blocks * BYTES_PER_BLOCK - n_bytes); + // zero out the bytes of the newly allocated blocks (see comment above in gc_alloc) + memset((byte*)ptr_in + n_blocks * BYTES_PER_BLOCK, 0, (new_blocks - n_blocks) * BYTES_PER_BLOCK); #if EXTENSIVE_HEAP_PROFILING gc_dump_alloc_table(); |