1 files changed, 25 insertions, 0 deletions
diff --git a/tools/clang-format/fuzzer/ClangFormatFuzzer.cpp b/tools/clang-format/fuzzer/ClangFormatFuzzer.cpp
new file mode 100644
index 000000000000..fe4941a5ba1a
--- /dev/null
+++ b/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 LLVMFuzzerTestOneInput(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())}));
+}