clang-tools-extra/clangd/fuzzer/clangd-fuzzer.cpp

   1 //===-- ClangdFuzzer.cpp - Fuzz clangd ------------------------------------===//
   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 clangd on a single input.
  11 /// This function is then linked into the Fuzzer library.
  12 ///
  13 //===----------------------------------------------------------------------===//
  14
  15 #include "ClangdLSPServer.h"
  16 #include "ClangdServer.h"
  17 #include "support/ThreadsafeFS.h"
  18 #include <cstdio>
  19
  20 using namespace clang::clangd;
  21
  22 extern "C" int LLVMFuzzerTestOneInput(uint8_t *Data, size_t Size) {
  23   if (Size == 0)
  24     return 0;
  25
  26   // fmemopen isn't portable, but I think we only run the fuzzer on Linux.
  27   std::FILE *In = fmemopen(Data, Size, "r");
  28   auto Transport = newJSONTransport(In, llvm::nulls(),
  29                                     /*InMirror=*/nullptr, /*Pretty=*/false,
  30                                     /*Style=*/JSONStreamStyle::Delimited);
  31   RealThreadsafeFS FS;
  32   CodeCompleteOptions CCOpts;
  33   ClangdLSPServer::Options Opts;
  34   Opts.CodeComplete.EnableSnippets = false;
  35   Opts.UseDirBasedCDB = false;
  36
  37   // Initialize and run ClangdLSPServer.
  38   ClangdLSPServer LSPServer(*Transport, FS, Opts);
  39   LSPServer.run();
  40   return 0;
  41 }