Add clang-format-fuzzer target

Summary:
This adds clang-format-fuzzer binary,
which depends on the Fuzzer lib,
see http://reviews.llvm.org/D7184

This fuzer has found ~15 bugs so far, and I hope to set up a bot for it.

Test Plan: run on a bot.

Reviewers: samsonov, djasper

Reviewed By: djasper

Subscribers: curdeius, cfe-commits

Differential Revision: http://reviews.llvm.org/D7202

llvm-svn: 227354

1 files changed, 25 insertions, 0 deletions

diff --git a/clang/tools/clang-format/fuzzer/ClangFormatFuzzer.cpp b/clang/tools/clang-format/fuzzer/ClangFormatFuzzer.cpp
new file mode 100644
index 00000000000..fff4283277e
--- /dev/null
+++ b/clang/tools/clang-format/fuzzer/ClangFormatFuzzer.cpp
@@ -0,0 +1,25 @@
+//===-- ClangFormatFuzzer.cpp - Fuzz the Clang format tool ----------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// \brief This file implements a function that runs Clang format on a single
+///  input. This function is then linked into the Fuzzer library.
+///
+//===----------------------------------------------------------------------===//
+
+#include "clang/Format/Format.h"
+
+extern "C" void TestOneInput(uint8_t *data, size_t size) {
+  // FIXME: fuzz more things: different styles, different style features.
+  std::string s((const char *)data, size);
+  auto Style = getGoogleStyle(clang::format::FormatStyle::LK_Cpp);
+  Style.ColumnLimit = 60;
+  applyAllReplacements(s, clang::format::reformat(
+                              Style, s, {clang::tooling::Range(0, s.size())}));
+}