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