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usr / src / contrib / llvm-project / compiler-rt / lib / fuzzer /

📁 ..
📄 FuzzerBuiltins.h(1.25 KB)
📄 FuzzerBuiltinsMsvc.h(2.33 KB)
📄 FuzzerCommand.h(5.95 KB)
📄 FuzzerCorpus.h(16.93 KB)
📄 FuzzerCrossOver.cpp(1.85 KB)
📄 FuzzerDataFlowTrace.cpp(9.93 KB)
📄 FuzzerDataFlowTrace.h(3.98 KB)
📄 FuzzerDefs.h(1.99 KB)
📄 FuzzerDictionary.h(3.32 KB)
📄 FuzzerDriver.cpp(28.35 KB)
📄 FuzzerExtFunctions.def(2.5 KB)
📄 FuzzerExtFunctions.h(1.04 KB)
📄 FuzzerExtFunctionsDlsym.cpp(1.63 KB)
📄 FuzzerExtFunctionsWeak.cpp(1.9 KB)
📄 FuzzerExtFunctionsWindows.cpp(2.79 KB)
📄 FuzzerExtraCounters.cpp(1.55 KB)
📄 FuzzerFlags.def(10.02 KB)
📄 FuzzerFork.cpp(12.53 KB)
📄 FuzzerFork.h(778 B)
📄 FuzzerIO.cpp(4.47 KB)
📄 FuzzerIO.h(3.31 KB)
📄 FuzzerIOPosix.cpp(4.47 KB)
📄 FuzzerIOWindows.cpp(11.59 KB)
📄 FuzzerInterface.h(3.03 KB)
📄 FuzzerInternal.h(5.33 KB)
📄 FuzzerLoop.cpp(28.54 KB)
📄 FuzzerMain.cpp(791 B)
📄 FuzzerMerge.cpp(13.75 KB)
📄 FuzzerMerge.h(3.31 KB)
📄 FuzzerMutate.cpp(20.02 KB)
📄 FuzzerMutate.h(6.57 KB)
📄 FuzzerOptions.h(2.36 KB)
📄 FuzzerPlatform.h(4.69 KB)
📄 FuzzerRandom.h(1.21 KB)
📄 FuzzerSHA1.cpp(5.56 KB)
📄 FuzzerSHA1.h(978 B)
📄 FuzzerTracePC.cpp(22.56 KB)
📄 FuzzerTracePC.h(8.87 KB)
📄 FuzzerUtil.cpp(6.75 KB)
📄 FuzzerUtil.h(3.25 KB)
📄 FuzzerUtilDarwin.cpp(5.87 KB)
📄 FuzzerUtilFuchsia.cpp(20.16 KB)
📄 FuzzerUtilLinux.cpp(1.12 KB)
📄 FuzzerUtilPosix.cpp(5.07 KB)
📄 FuzzerUtilWindows.cpp(5.93 KB)
📄 FuzzerValueBitMap.h(2.24 KB)
📄 README.txt(40 B)

Editing: FuzzerCrossOver.cpp

//===- FuzzerCrossOver.cpp - Cross over two test inputs -------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// Cross over test inputs.
//===----------------------------------------------------------------------===//

#include "FuzzerDefs.h"
#include "FuzzerMutate.h"
#include "FuzzerRandom.h"
#include <cstring>

namespace fuzzer {

// Cross Data1 and Data2, store the result (up to MaxOutSize bytes) in Out.
size_t MutationDispatcher::CrossOver(const uint8_t *Data1, size_t Size1,
                                     const uint8_t *Data2, size_t Size2,
                                     uint8_t *Out, size_t MaxOutSize) {
  assert(Size1 || Size2);
  MaxOutSize = Rand(MaxOutSize) + 1;
  size_t OutPos = 0;
  size_t Pos1 = 0;
  size_t Pos2 = 0;
  size_t *InPos = &Pos1;
  size_t InSize = Size1;
  const uint8_t *Data = Data1;
  bool CurrentlyUsingFirstData = true;
  while (OutPos < MaxOutSize && (Pos1 < Size1 || Pos2 < Size2)) {
    // Merge a part of Data into Out.
    size_t OutSizeLeft = MaxOutSize - OutPos;
    if (*InPos < InSize) {
      size_t InSizeLeft = InSize - *InPos;
      size_t MaxExtraSize = std::min(OutSizeLeft, InSizeLeft);
      size_t ExtraSize = Rand(MaxExtraSize) + 1;
      memcpy(Out + OutPos, Data + *InPos, ExtraSize);
      OutPos += ExtraSize;
      (*InPos) += ExtraSize;
    }
    // Use the other input data on the next iteration.
    InPos  = CurrentlyUsingFirstData ? &Pos2 : &Pos1;
    InSize = CurrentlyUsingFirstData ? Size2 : Size1;
    Data   = CurrentlyUsingFirstData ? Data2 : Data1;
    CurrentlyUsingFirstData = !CurrentlyUsingFirstData;
  }
  return OutPos;
}

}  // namespace fuzzer

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Editing: FuzzerCrossOver.cpp

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