From cdf4f3055e964bb585f294cf77cb549ead82783f Mon Sep 17 00:00:00 2001
From: Dimitry Andric <dim@FreeBSD.org>
Date: Mon, 18 Dec 2017 20:11:54 +0000
Subject: Vendor import of compiler-rt trunk r321017:
 https://llvm.org/svn/llvm-project/compiler-rt/trunk@321017

---
 test/fuzzer/CustomCrossOverAndMutateTest.cpp | 34 ++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 test/fuzzer/CustomCrossOverAndMutateTest.cpp

(limited to 'test/fuzzer/CustomCrossOverAndMutateTest.cpp')

diff --git a/test/fuzzer/CustomCrossOverAndMutateTest.cpp b/test/fuzzer/CustomCrossOverAndMutateTest.cpp
new file mode 100644
index 000000000000..74fc939534ca
--- /dev/null
+++ b/test/fuzzer/CustomCrossOverAndMutateTest.cpp
@@ -0,0 +1,34 @@
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+
+// Test that libFuzzer does not crash when LLVMFuzzerMutate called from
+// LLVMFuzzerCustomCrossOver.
+#include <algorithm>
+#include <cstddef>
+#include <cstdint>
+#include <cstdlib>
+#include <string.h>
+#include <string>
+#include <vector>
+
+#include "FuzzerInterface.h"
+
+static volatile int sink;
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
+  std::string Str(reinterpret_cast<const char *>(Data), Size);
+  if (Size && Data[0] == '0')
+    sink++;
+  return 0;
+}
+
+extern "C" size_t LLVMFuzzerCustomCrossOver(const uint8_t *Data1, size_t Size1,
+                                            const uint8_t *Data2, size_t Size2,
+                                            uint8_t *Out, size_t MaxOutSize,
+                                            unsigned int Seed) {
+  std::vector<uint8_t> Buffer(MaxOutSize * 10);
+  LLVMFuzzerMutate(Buffer.data(), Buffer.size(), Buffer.size());
+  size_t Size = std::min(Size1, MaxOutSize);
+  memcpy(Out, Data1, Size);
+  return Size;
+}
-- 
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