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 | 42ed860e35e7d30dc37b5dd548eeb7b1cb5dd902 (patch) | |
| tree | ccb5e69be4a71d5f0cc03def1d2487009b4f0129 /test | |
| parent | dcd249132f2d06fb3209b0f965ad1b09ef61feb0 (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
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@331310 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/fuzzer/AcquireCrashStateTest.cpp | 18 | ||||
| -rw-r--r-- | test/fuzzer/acquire-crash-state.test | 3 |
2 files changed, 21 insertions, 0 deletions
diff --git a/test/fuzzer/AcquireCrashStateTest.cpp b/test/fuzzer/AcquireCrashStateTest.cpp new file mode 100644 index 000000000..0fe71fd46 --- /dev/null +++ b/test/fuzzer/AcquireCrashStateTest.cpp @@ -0,0 +1,18 @@ +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. + +// Ensures that error reports are suppressed after +// __sanitizer_acquire_crash_state() has been called the first time. +#include "sanitizer/common_interface_defs.h" + +#include <cassert> +#include <cstdint> +#include <cstdlib> + +extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) { + assert(Data); + if (Size == 0) return 0; + __sanitizer_acquire_crash_state(); + exit(0); // No report should be generated here. +} + diff --git a/test/fuzzer/acquire-crash-state.test b/test/fuzzer/acquire-crash-state.test new file mode 100644 index 000000000..db893df90 --- /dev/null +++ b/test/fuzzer/acquire-crash-state.test @@ -0,0 +1,3 @@ +RUN: %cpp_compiler %S/AcquireCrashStateTest.cpp -o %t +RUN: %t 2>&1 | FileCheck %s +CHECK-NOT: fuzz target exited |