[FFmpeg-devel] [PATCH] mem: heap memory poisoning.
Clément Bœsch
ubitux at gmail.com
Mon Jul 2 19:32:04 CEST 2012
Enable it by default with FATE.
limitation: not random, and not supported with realloc.
---
configure | 2 ++
libavutil/mem.c | 7 ++++++-
tests/fate.sh | 1 +
3 files changed, 9 insertions(+), 1 deletion(-)
diff --git a/configure b/configure
index a1346fa..cb8a04d 100755
--- a/configure
+++ b/configure
@@ -286,6 +286,7 @@ Developer options (useful when working on FFmpeg itself):
--disable-stripping disable stripping of executables and shared libraries
--assert-level=level 0(default), 1 or 2, amount of assertion testing,
2 causes a slowdown at runtime.
+ --enable-memory-poisoning fill heap uninitialized allocated space with arbitrary data
--valgrind=VALGRIND run "make fate" tests through valgrind to detect memory
leaks and errors, using the specified valgrind binary.
Cannot be combined with --target-exec
@@ -1080,6 +1081,7 @@ CONFIG_LIST="
lsp
mdct
memalign_hack
+ memory_poisoning
mpegaudiodsp
network
nonfree
diff --git a/libavutil/mem.c b/libavutil/mem.c
index 385ace0..20485a8 100644
--- a/libavutil/mem.c
+++ b/libavutil/mem.c
@@ -125,8 +125,13 @@ void *av_malloc(size_t size)
#else
ptr = malloc(size);
#endif
- if(!ptr && !size)
+ if(!ptr && !size) {
+ size = 1;
ptr= av_malloc(1);
+ }
+#if CONFIG_MEMORY_POISONING
+ memset(ptr, 0x2a, size);
+#endif
return ptr;
}
diff --git a/tests/fate.sh b/tests/fate.sh
index a7b15cd..0bf10ab 100755
--- a/tests/fate.sh
+++ b/tests/fate.sh
@@ -45,6 +45,7 @@ configure()(
--prefix="${inst}" \
--samples="${samples}" \
--enable-gpl \
+ --enable-memory-poisoning \
${arch:+--arch=$arch} \
${cpu:+--cpu="$cpu"} \
${cross_prefix:+--cross-prefix="$cross_prefix"} \
--
1.7.11.1
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