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[libFuzzer] don't report memory leaks if we are dying due to a timeout (just use _Exit instead of exit in the timeout callback)

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@264237 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Kostya Serebryany 2016-03-24 01:32:08 +00:00
parent f4b00d0631
commit c09d592889
5 changed files with 25 additions and 5 deletions
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2
lib/Fuzzer/FuzzerLoop.cpp
View File

@ -164,7 +164,7 @@ void Fuzzer::AlarmCallback() {
__sanitizer_print_stack_trace();
Printf("SUMMARY: libFuzzer: timeout\n");
PrintFinalStats();
exit(Options.TimeoutExitCode);
_Exit(Options.TimeoutExitCode); // Stop right now.
}
}

1
lib/Fuzzer/test/CMakeLists.txt
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@ -22,6 +22,7 @@ set(Tests
InitializeTest
MemcmpTest
LeakTest
LeakTimeoutTest
NullDerefTest
NthRunCrashTest
RepeatedMemcmp

14
lib/Fuzzer/test/LeakTimeoutTest.cpp Normal file
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@ -0,0 +1,14 @@
// Test with a leak.
#include <cstdint>
#include <cstddef>
static volatile int *Sink;
extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
if (!Size) return 0;
Sink = new int;
Sink = new int;
while (Sink) *Sink = 0; // Infinite loop.
return 0;
}

9
lib/Fuzzer/test/fuzzer-leak.test Normal file
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@ -0,0 +1,9 @@
RUN: not LLVMFuzzer-LeakTest -runs=10 2>&1 | FileCheck %s --check-prefix=LEAK
LEAK: ERROR: LeakSanitizer: detected memory leaks
LEAK-NOT: DEATH:
RUN: not LLVMFuzzer-LeakTimeoutTest -timeout=1 2>&1 | FileCheck %s --check-prefix=LEAK_TIMEOUT
LEAK_TIMEOUT: ERROR: libFuzzer: timeout after
LEAK_TIMEOUT-NOT: LeakSanitizer

4
lib/Fuzzer/test/fuzzer.test
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@ -69,10 +69,6 @@ RUN: LLVMFuzzer-SimpleTest %t/SUB1 -runs=0 2>&1 | FileCheck %s --check-prefix=SU
SUBDIRS: READ units: 3
RUN: rm -rf %t/SUB1
RUN: not LLVMFuzzer-LeakTest -runs=10 2>&1 | FileCheck %s --check-prefix=LEAK
LEAK: ERROR: LeakSanitizer: detected memory leaks
LEAK-NOT: DEATH:
RUN: mkdir -p %t
RUN: echo abcd > %t/NthRunCrashTest.in
RUN: LLVMFuzzer-NthRunCrashTest %t/NthRunCrashTest.in