diff options
| author | Matt Morehouse <mascasa@google.com> | 2018-05-01 21:01:53 +0000 |
|---|---|---|
| committer | Matt Morehouse <mascasa@google.com> | 2018-05-01 21:01:53 +0000 |
| commit | 55cb88a5d54991fdeef6ebec5be03d02fb5561e8 (patch) | |
| tree | 1de8beb6f5657b10361f3a08be8066e05ba39e52 /compiler-rt/include | |
| parent | 750c2ff5fbf5cd4688e51f72e12a98b50de29282 (diff) | |
[libFuzzer] Report at most one crash per input.
Summary:
Fixes https://github.com/google/sanitizers/issues/788/, a deadlock
caused by multiple crashes happening at the same time. Before printing
a crash report, we now test and set an atomic flag. If the flag was
already set, the crash handler returns immediately.
Reviewers: kcc
Reviewed By: kcc
Subscribers: llvm-commits, kubamracek
Differential Revision: https://reviews.llvm.org/D46277
Diffstat (limited to 'compiler-rt/include')
| -rw-r--r-- | compiler-rt/include/sanitizer/common_interface_defs.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/compiler-rt/include/sanitizer/common_interface_defs.h b/compiler-rt/include/sanitizer/common_interface_defs.h index 6d4326f7402..d11cb1addc2 100644 --- a/compiler-rt/include/sanitizer/common_interface_defs.h +++ b/compiler-rt/include/sanitizer/common_interface_defs.h @@ -65,6 +65,11 @@ extern "C" { void __sanitizer_unaligned_store32(void *p, uint32_t x); void __sanitizer_unaligned_store64(void *p, uint64_t x); + // Returns 1 on the first call, then returns 0 thereafter. Called by the tool + // to ensure only one report is printed when multiple errors occur + // simultaneously. + int __sanitizer_acquire_crash_state(); + // Annotate the current state of a contiguous container, such as // std::vector, std::string or similar. // A contiguous container is a container that keeps all of its elements |