[libFuzzer] use trace-div and trace-gep for guided fuzzing, add tests

llvm-svn: 280046

1 files changed, 20 insertions, 0 deletions

diff --git a/llvm/lib/Fuzzer/test/DivTest.cpp b/llvm/lib/Fuzzer/test/DivTest.cpp
new file mode 100644
index 0000000..63f6960
--- /dev/null
+++ b/llvm/lib/Fuzzer/test/DivTest.cpp
@@ -0,0 +1,20 @@
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+
+// Simple test for a fuzzer: find the interesting argument for div.
+#include <assert.h>
+#include <cstdint>
+#include <cstring>
+#include <cstddef>
+#include <iostream>
+
+static volatile int Sink;
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
+  if (Size < 4) return 0;
+  int a;
+  memcpy(&a, Data, 4);
+  Sink = 12345678 / (987654 - a);
+  return 0;
+}
+