1 //===-- fuzzer_initialize.cpp - Fuzz Clang --------------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 ///
10 /// \file
11 /// This file implements two functions: one that returns the command line
12 /// arguments for a given call to the fuzz target and one that initializes
13 /// the fuzzer with the correct command line arguments.
14 ///
15 //===----------------------------------------------------------------------===//
16 
17 #include "fuzzer_initialize.h"
18 
19 #include "llvm/InitializePasses.h"
20 #include "llvm/PassRegistry.h"
21 #include "llvm/Support/TargetSelect.h"
22 #include <cstring>
23 
24 using namespace clang_fuzzer;
25 using namespace llvm;
26 
27 
28 namespace clang_fuzzer {
29 
30 static std::vector<const char *> CLArgs;
31 
32 const std::vector<const char *>& GetCLArgs() {
33   return CLArgs;
34 }
35 
36 }
37 
38 extern "C" int LLVMFuzzerInitialize(int *argc, char ***argv) {
39   InitializeAllTargets();
40   InitializeAllTargetMCs();
41   InitializeAllAsmPrinters();
42   InitializeAllAsmParsers();
43 
44   PassRegistry &Registry = *PassRegistry::getPassRegistry();
45   initializeCore(Registry);
46   initializeScalarOpts(Registry);
47   initializeVectorization(Registry);
48   initializeIPO(Registry);
49   initializeAnalysis(Registry);
50   initializeTransformUtils(Registry);
51   initializeInstCombine(Registry);
52   initializeAggressiveInstCombine(Registry);
53   initializeInstrumentation(Registry);
54   initializeTarget(Registry);
55 
56   CLArgs.push_back("-O2");
57   for (int I = 1; I < *argc; I++) {
58     if (strcmp((*argv)[I], "-ignore_remaining_args=1") == 0) {
59       for (I++; I < *argc; I++)
60         CLArgs.push_back((*argv)[I]);
61       break;
62     }
63   }
64   return 0;
65 }
66