[libFuzzer] disable leak detection if we have tried it for 1000 times w/o finding a leak

llvm-svn: 267770

2 files changed, 18 insertions, 0 deletions

diff --git a/llvm/lib/Fuzzer/test/AccumulateAllocationsTest.cpp b/llvm/lib/Fuzzer/test/AccumulateAllocationsTest.cpp
new file mode 100644
index 00000000000..604d8fa299a
--- /dev/null
+++ b/llvm/lib/Fuzzer/test/AccumulateAllocationsTest.cpp
@@ -0,0 +1,17 @@
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+
+// Test with a more mallocs than frees, but no leak.
+#include <cstdint>
+#include <cstddef>
+
+const int kAllocatedPointersSize = 10000;
+int NumAllocatedPointers = 0;
+int *AllocatedPointers[kAllocatedPointersSize];
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
+  if (NumAllocatedPointers < kAllocatedPointersSize)
+    AllocatedPointers[NumAllocatedPointers++] = new int;
+  return 0;
+}
+
diff --git a/llvm/lib/Fuzzer/test/CMakeLists.txt b/llvm/lib/Fuzzer/test/CMakeLists.txt
index 3bda0a99baf..ff1a7349f1a 100644
--- a/llvm/lib/Fuzzer/test/CMakeLists.txt
+++ b/llvm/lib/Fuzzer/test/CMakeLists.txt
@@ -13,6 +13,7 @@ set(DFSanTests
   )
 
 set(Tests
+  AccumulateAllocationsTest
   BufferOverflowOnInput
   CallerCalleeTest
   CounterTest