[libFuzzer] Use OptForFuzzing attribute with -fsanitize=fuzzer.
Summary:
Disables certain CMP optimizations to improve fuzzing signal under -O1
and -O2.
Switches all fuzzer tests to -O2 except for a few leak tests where the
leak is optimized out under -O2.
Reviewers: kcc, vitalybuka
Reviewed By: vitalybuka
Subscribers: cfe-commits, llvm-commits
Differential Revision: https://reviews.llvm.org/D44798
llvm-svn: 328384
diff --git a/compiler-rt/test/fuzzer/SimpleCmpTest.cpp b/compiler-rt/test/fuzzer/SimpleCmpTest.cpp
index 8acad4a..3bb28c1 100644
--- a/compiler-rt/test/fuzzer/SimpleCmpTest.cpp
+++ b/compiler-rt/test/fuzzer/SimpleCmpTest.cpp
@@ -17,15 +17,15 @@
}
extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
- if (Size != 22) return 0;
+ if (Size != 24) return 0;
uint64_t x = 0;
int64_t y = 0;
int32_t z = 0;
- uint16_t a = 0;
+ uint32_t a = 0;
memcpy(&x, Data, 8); // 8
memcpy(&y, Data + 8, 8); // 16
memcpy(&z, Data + 16, sizeof(z)); // 20
- memcpy(&a, Data + 20, sizeof(a)); // 22
+ memcpy(&a, Data + 20, sizeof(a)); // 24
const bool k32bit = sizeof(void*) == 4;
if ((k32bit || x > 1234567890) && PrintOnce(__LINE__) &&