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[libFuzzer] avoid msan false positives in more cases

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@289999 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Kostya Serebryany 2016-12-16 22:45:25 +00:00
parent eb30028464
commit c7ab3c7402
3 changed files with 12 additions and 6 deletions
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7
lib/Fuzzer/FuzzerDefs.h
View File

@ -44,6 +44,13 @@
#define ATTRIBUTE_TARGET_POPCNT
#endif
#ifdef __clang__ // avoid gcc warning.
# define ATTRIBUTE_NO_SANITIZE_MEMORY __attribute__((no_sanitize("memory")))
#else
# define ATTRIBUTE_NO_SANITIZE_MEMORY
#endif
namespace fuzzer {
template <class T> T Min(T a, T b) { return a < b ? a : b; }

3
lib/Fuzzer/FuzzerLoop.cpp
View File

@ -137,6 +137,7 @@ struct MallocFreeTracer {
static MallocFreeTracer AllocTracer;
ATTRIBUTE_NO_SANITIZE_MEMORY
void MallocHook(const volatile void *ptr, size_t size) {
size_t N = AllocTracer.Mallocs++;
F->HandleMalloc(size);
@ -146,6 +147,8 @@ void MallocHook(const volatile void *ptr, size_t size) {
EF->__sanitizer_print_stack_trace();
}
}
ATTRIBUTE_NO_SANITIZE_MEMORY
void FreeHook(const volatile void *ptr) {
size_t N = AllocTracer.Frees++;
if (int TraceLevel = AllocTracer.TraceLevel) {

8
lib/Fuzzer/FuzzerTracePC.cpp
View File

@ -198,9 +198,7 @@ void TracePC::PrintCoverage() {
// For cmp instructions the interesting value is a XOR of the parameters.
// The interesting value is mixed up with the PC and is then added to the map.
#ifdef __clang__ // avoid gcc warning.
__attribute__((no_sanitize("memory")))
#endif
ATTRIBUTE_NO_SANITIZE_MEMORY
void TracePC::AddValueForMemcmp(void *caller_pc, const void *s1, const void *s2,
size_t n) {
if (!n) return;
@ -218,9 +216,7 @@ void TracePC::AddValueForMemcmp(void *caller_pc, const void *s1, const void *s2,
TPC.HandleValueProfile((PC & 4095) | (Idx << 12));
}
#ifdef __clang__ // avoid gcc warning.
__attribute__((no_sanitize("memory")))
#endif
ATTRIBUTE_NO_SANITIZE_MEMORY
void TracePC::AddValueForStrcmp(void *caller_pc, const char *s1, const char *s2,
size_t n) {
if (!n) return;