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| author |   Dave Barach <dave@barachs.net> | 2018-07-31 10:39:30 -0400 |
|---|---|---|
| committer |   Florin Coras <florin.coras@gmail.com> | 2018-07-31 20:37:47 +0000 |
| commit | 1c7bf5d41737984907e8bad1dc832eb6cb1d6288 (patch) | |
| tree | e93f89435bec22de3f331b020497b7ee43471caa | |
| parent | 7d92c09b559969fac8b5c1847ed6af2a3bdc9277 (diff) | |
Poison freed memory objects
When compiled w/ -DCLIB_DEBUG=1, paint 0x13 across freed memory
blocks. Should result in a characteristic SIGSEGV if someone
dereferences a pointer in a freed vector element, etc.
Change-Id: I5f78970f4342310bfbe7adeddb56feff21f0de2c
Signed-off-by: Dave Barach <dave@barachs.net>
| -rw-r--r-- | src/vppinfra/dlmalloc.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/vppinfra/dlmalloc.c b/src/vppinfra/dlmalloc.c index 8ae92cf566c..1bc8f656b66 100644 --- a/src/vppinfra/dlmalloc.c +++ b/src/vppinfra/dlmalloc.c @@ -4271,6 +4271,14 @@ void mspace_put (mspace msp, void *p_arg) mheap_put_trace ((u64)p_arg, psize); } +#if CLIB_DEBUG > 0 + /* Poison the object */ + { + size_t psize = mspace_usable_size (object_header); + memset (object_header, 0x13, psize); + } +#endif + /* And free it... */ mspace_free (msp, object_header); } |