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Fix a memory corruption bug in chunk_alloc_dss().

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Fix a memory corruption bug in chunk_alloc_dss() that was due to
claiming newly allocated memory is zeroed.

Reverse order of preference between mmap() and sbrk() to prefer mmap().

Clean up management of 'zero' parameter in chunk_alloc*().
This commit is contained in:
Jason Evans 2012-04-21 13:33:48 -07:00
parent 606f1fdc3c
commit 8f0e0eb1c0
6 changed files with 20 additions and 15 deletions
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10
src/chunk.c
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@ -125,16 +125,16 @@ chunk_alloc(size_t size, size_t alignment, bool base, bool *zero)
ret = chunk_recycle(size, alignment, zero);
if (ret != NULL)
goto label_return;
ret = chunk_alloc_mmap(size, alignment, zero);
if (ret != NULL)
goto label_return;
if (config_dss) {
ret = chunk_alloc_dss(size, alignment, zero);
if (ret != NULL)
goto label_return;
}
ret = chunk_alloc_mmap(size, alignment);
if (ret != NULL) {
*zero = true;
goto label_return;
}
/* All strategies for allocation failed. */
ret = NULL;