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| author | Siddhesh Poyarekar <siddhesh@redhat.com> | 2012-10-18 08:25:03 +0530 |
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| committer | Siddhesh Poyarekar <siddhesh@redhat.com> | 2012-10-18 08:25:03 +0530 |
| commit | b741de23e214763ba4ffcd95829315dd315897ea (patch) | |
| tree | fb91b0f94ac731cffbda73c7c948158d0ece5a0b /manual/memory.texi | |
| parent | f9b9d9c9452f988d8d582a6ddb58fd4822b4c29d (diff) | |
| download | glibc-b741de23e214763ba4ffcd95829315dd315897ea.tar.gz glibc-b741de23e214763ba4ffcd95829315dd315897ea.tar.xz glibc-b741de23e214763ba4ffcd95829315dd315897ea.zip | |
Add note on free list pointers overwriting M_PERTURB bytes
Fixes BZ #12140.
Diffstat (limited to 'manual/memory.texi')
| -rw-r--r-- | manual/memory.texi | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/manual/memory.texi b/manual/memory.texi index fba3a2cffe..5b14aa69b9 100644 --- a/manual/memory.texi +++ b/manual/memory.texi @@ -706,7 +706,10 @@ to zero disables all use of @code{mmap}. If non-zero, memory blocks are filled with values depending on some low order bits of this parameter when they are allocated (except when allocated by @code{calloc}) and freed. This can be used to debug the -use of uninitialized or freed heap memory. +use of uninitialized or freed heap memory. Note that this option does not +guarantee that the freed block will have any specific values. It only +guarantees that the content the block had before it was freed will be +overwritten. @end table @end deftypefun |