FuzzingInterfaceStream.h

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

/*

 * Interface definitions for the unified fuzzing interface with streaming

 * support

*/

#ifndef FuzzingInterfaceStream_h__

#define FuzzingInterfaceStream_h__

#ifdef JS_STANDALONE

#  error "FuzzingInterfaceStream.h cannot be used in JS standalone builds."

#endif

#include "gtest/gtest.h"

#include "nsComponentManagerUtils.h"

#include "nsCOMPtr.h"

#include "nsIInputStream.h"

#include "nsDirectoryServiceDefs.h"

#include "nsStreamUtils.h"

#include "nsStringStream.h"

#include <fstream>

#include "FuzzingInterface.h"

namespace mozilla {

typedef int (*FuzzingTestFuncStream)(nsCOMPtr<nsIInputStream>);

#ifdef AFLFUZZ

void afl_interface_stream(const char* testFile, FuzzingTestFuncStream testFunc);

#  define MOZ_AFL_INTERFACE_COMMON(initFunc)                              \

    if (initFunc) initFunc(NULL, NULL);                                   \

    char* testFilePtr = getenv("MOZ_FUZZ_TESTFILE");                      \

    if (!testFilePtr) {                                                   \

      fprintf(stderr,                                                     \

              "Must specify testfile in MOZ_FUZZ_TESTFILE environment "   \

              "variable.\n");                                             \

      return;                                                             \

    }                                                                     \

    /* Make a copy of testFilePtr so the testing function can safely call \

     * getenv                                                             \

     */                                                                   \

    std::string testFile(testFilePtr);

#  define MOZ_AFL_INTERFACE_STREAM(initFunc, testFunc, moduleName) \

    TEST(AFL, moduleName)                                          \

    {                                                              \

      MOZ_AFL_INTERFACE_COMMON(initFunc);                          \

      ::mozilla::afl_interface_stream(testFile.c_str(), testFunc); \

#else

#  define MOZ_AFL_INTERFACE_STREAM(initFunc, testFunc, moduleName) /* Nothing \

*/

#endif

#ifdef LIBFUZZER

#  define MOZ_LIBFUZZER_INTERFACE_STREAM(initFunc, testFunc, moduleName)       \

    static int LibFuzzerTest##moduleName(const uint8_t* data, size_t size) {   \

      if (size > INT32_MAX) return 0;                                          \

      nsCOMPtr<nsIInputStream> stream;                                         \

      nsresult rv = NS_NewByteInputStream(getter_AddRefs(stream),              \

                                          Span((const char*)data, size),       \

                                          NS_ASSIGNMENT_DEPEND);               \

      MOZ_RELEASE_ASSERT(NS_SUCCEEDED(rv));                                    \

      testFunc(stream.forget());                                               \

      return 0;                                                                \

    }                                                                          \

    static void __attribute__((constructor)) LibFuzzerRegister##moduleName() { \

      ::mozilla::FuzzerRegistry::getInstance().registerModule(                 \

          #moduleName, initFunc, LibFuzzerTest##moduleName);                   \

#else

#  define MOZ_LIBFUZZER_INTERFACE_STREAM(initFunc, testFunc, \

                                         moduleName) /* Nothing */

#endif

#define MOZ_FUZZING_INTERFACE_STREAM(initFunc, testFunc, moduleName) \

  MOZ_LIBFUZZER_INTERFACE_STREAM(initFunc, testFunc, moduleName);    \

  MOZ_AFL_INTERFACE_STREAM(initFunc, testFunc, moduleName);

}  // namespace mozilla

#endif  // FuzzingInterfaceStream_h__