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
LLVMFuzzerTestOneInput(uint8_t * Data,size_t Size)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 }
42