From 10ab2ace1359fd96cd662ad235797e29f9ba3daa Mon Sep 17 00:00:00 2001
From: George Karpenkov <ekarpenkov@apple.com>
Date: Mon, 21 Aug 2017 23:25:50 +0000
Subject: Move libFuzzer to compiler_rt.

Resulting library binaries will be named libclang_rt.fuzzer*, and will
be placed in Clang toolchain, allowing redistribution.

Differential Revision: https://reviews.llvm.org/D36908

llvm-svn: 311407
---
 compiler-rt/test/fuzzer/SwitchTest.cpp | 58 ++++++++++++++++++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100644 compiler-rt/test/fuzzer/SwitchTest.cpp

(limited to 'compiler-rt/test/fuzzer/SwitchTest.cpp')

diff --git a/compiler-rt/test/fuzzer/SwitchTest.cpp b/compiler-rt/test/fuzzer/SwitchTest.cpp
new file mode 100644
index 00000000000..86944cad21c
--- /dev/null
+++ b/compiler-rt/test/fuzzer/SwitchTest.cpp
@@ -0,0 +1,58 @@
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+
+// Simple test for a fuzzer. The fuzzer must find the interesting switch value.
+#include <cstddef>
+#include <cstdint>
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+
+static volatile int Sink;
+
+template<class T>
+bool Switch(const uint8_t *Data, size_t Size) {
+  T X;
+  if (Size < sizeof(X)) return false;
+  memcpy(&X, Data, sizeof(X));
+  switch (X) {
+    case 1: Sink = __LINE__; break;
+    case 101: Sink = __LINE__; break;
+    case 1001: Sink = __LINE__; break;
+    case 10001: Sink = __LINE__; break;
+    case 100001: Sink = __LINE__; break;
+    case 1000001: Sink = __LINE__; break;
+    case 10000001: Sink = __LINE__; break;
+    case 100000001: return true;
+  }
+  return false;
+}
+
+bool ShortSwitch(const uint8_t *Data, size_t Size) {
+  short X;
+  if (Size < sizeof(short)) return false;
+  memcpy(&X, Data, sizeof(short));
+  switch(X) {
+    case 42: Sink = __LINE__; break;
+    case 402: Sink = __LINE__; break;
+    case 4002: Sink = __LINE__; break;
+    case 5002: Sink = __LINE__; break;
+    case 7002: Sink = __LINE__; break;
+    case 9002: Sink = __LINE__; break;
+    case 14002: Sink = __LINE__; break;
+    case 21402: return true;
+  }
+  return false;
+}
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
+  if (Size >= 4  && Switch<int>(Data, Size) &&
+      Size >= 12 && Switch<uint64_t>(Data + 4, Size - 4) &&
+      Size >= 14 && ShortSwitch(Data + 12, 2)
+    ) {
+    fprintf(stderr, "BINGO; Found the target, exiting\n");
+    exit(1);
+  }
+  return 0;
+}
+
-- 
cgit v1.2.3