clang/tools/clang-format/fuzzer/ClangFormatFuzzer.cpp

   1 //===-- ClangFormatFuzzer.cpp - Fuzz the Clang format tool ----------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 ///
   9 /// \file
  10 /// This file implements a function that runs Clang format on a single
  11 ///  input. This function is then linked into the Fuzzer library.
  12 ///
  13 //===----------------------------------------------------------------------===//
  14
  15 #include "clang/Format/Format.h"
  16
  17 extern "C" int LLVMFuzzerTestOneInput(uint8_t *data, size_t size) {
  18   // FIXME: fuzz more things: different styles, different style features.
  19   std::string s((const char *)data, size);
  20   auto Style = getGoogleStyle(clang::format::FormatStyle::LK_Cpp);
  21   Style.ColumnLimit = 60;
  22   Style.Macros.push_back("ASSIGN_OR_RETURN(a, b)=a = (b)");
  23   Style.Macros.push_back("ASSIGN_OR_RETURN(a, b, c)=a = (b); if (x) return c");
  24   Style.Macros.push_back("MOCK_METHOD(r, n, a, s)=r n a s");
  25   auto Replaces = reformat(Style, s, clang::tooling::Range(0, s.size()));
  26   auto Result = applyAllReplacements(s, Replaces);
  27
  28   // Output must be checked, as otherwise we crash.
  29   if (!Result) {
  30   }
  31   return 0;
  32 }