[PATCH] Add clang-format-fuzzer target

[Kostya Serebryany]

addressed Alexey's comments.


http://reviews.llvm.org/D7202

Files:
  tools/clang-format/CMakeLists.txt
  tools/clang-format/fuzzer/
  tools/clang-format/fuzzer/CMakeLists.txt
  tools/clang-format/fuzzer/ClangFormatFuzzer.cpp

Index: tools/clang-format/CMakeLists.txt
===================================================================
--- tools/clang-format/CMakeLists.txt
+++ tools/clang-format/CMakeLists.txt
@@ -4,13 +4,19 @@
   ClangFormat.cpp
   )
 
-target_link_libraries(clang-format
+set(CLANG_FORMAT_LIB_DEPS
   clangBasic
   clangFormat
   clangRewrite
   clangToolingCore
   )
 
+target_link_libraries(clang-format
+  $CLANG_FORMAT_LIB_DEPS
+  )
+
+add_subdirectory(fuzzer)
+
 install(TARGETS clang-format RUNTIME DESTINATION bin)
 install(PROGRAMS clang-format-bbedit.applescript DESTINATION share/clang)
 install(PROGRAMS clang-format-diff.py DESTINATION share/clang)
Index: tools/clang-format/fuzzer/CMakeLists.txt
===================================================================
--- /dev/null
+++ tools/clang-format/fuzzer/CMakeLists.txt
@@ -0,0 +1,11 @@
+set(LLVM_LINK_COMPONENTS support)
+
+add_clang_executable(clang-format-fuzzer
+  EXCLUDE_FROM_ALL
+  ClangFormatFuzzer.cpp
+  )
+
+target_link_libraries(clang-format-fuzzer
+  ${CLANG_FORMAT_LIB_DEPS}
+  LLVMFuzzer
+  )
Index: tools/clang-format/fuzzer/ClangFormatFuzzer.cpp
===================================================================
--- /dev/null
+++ 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())}));
+}

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