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Add assertions that detect some forms of region separator corruption.

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This commit is contained in:
Jason Evans 2006-01-19 19:08:11 +00:00
parent a3bb22bc8e
commit ea41be77ba
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=154556
1 changed files with 7 additions and 0 deletions
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7
lib/libc/stdlib/malloc.c
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@ -1144,6 +1144,11 @@ static __inline size_t
region_next_size_get(region_sep_t *sep)
{
/* The region cannot extend past the end of the containing chunk. */
assert(CHUNK_ADDR2OFFSET(&sep[1])
+ (size_t) (((sep->bits) & NEXT_SIZE_MASK) << opt_quantum_2pow)
<= chunk_size);
return ((size_t) (((sep->bits) & NEXT_SIZE_MASK) << opt_quantum_2pow));
}
@ -1153,6 +1158,8 @@ region_next_size_set(region_sep_t *sep, size_t size)
uint32_t bits;
assert(size % quantum == 0);
/* The region cannot extend past the end of the containing chunk. */
assert(CHUNK_ADDR2OFFSET(&sep[1]) + size <= chunk_size);
bits = sep->bits;
bits &= ~NEXT_SIZE_MASK;