[libFuzzer] add a test with two different bugs

llvm-svn: 298030

llvm/lib/Fuzzer/test/CMakeLists.txt

@@ -128,6 +128,7 @@ set(Tests
   TimeoutTest
   TimeoutEmptyTest
   TraceMallocTest
+  TwoDifferentBugsTest
   )
 
 if(APPLE OR MSVC)

llvm/lib/Fuzzer/test/TwoDifferentBugsTest.cpp

@@ -0,0 +1,22 @@
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+
+// Simple test for a fuzzer. This test may trigger two different bugs.
+#include <cstdint>
+#include <cstdlib>
+#include <cstddef>
+#include <iostream>
+
+static volatile int *Null = 0;
+
+void Foo() { Null[1] = 0; }
+void Bar() { Null[2] = 0; }
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
+  if (Size < 10 && Data[0] == 'H')
+    Foo();
+  if (Size >= 10 && Data[0] == 'H')
+    Bar();
+  return 0;
+}
+