forked from mirrors/gecko-dev
115 lines
4 KiB
C++
115 lines
4 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/*
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* Interface definitions for the unified fuzzing interface
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*/
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#ifndef FuzzingInterface_h__
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#define FuzzingInterface_h__
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#include <fstream>
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#ifdef LIBFUZZER
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# include "FuzzerExtFunctions.h"
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#endif
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#include "FuzzerRegistry.h"
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#include "mozilla/Assertions.h"
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#ifndef JS_STANDALONE
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# include "mozilla/Logging.h"
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#endif
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namespace mozilla {
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#ifdef JS_STANDALONE
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void fuzzing_log(const char* aFmt, ...);
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# define MOZ_LOG_EXPAND_ARGS(...) __VA_ARGS__
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# define FUZZING_LOG(args) fuzzing_log(MOZ_LOG_EXPAND_ARGS args);
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#else
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extern LazyLogModule gFuzzingLog;
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# define FUZZING_LOG(args) \
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MOZ_LOG(mozilla::gFuzzingLog, mozilla::LogLevel::Verbose, args)
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#endif // JS_STANDALONE
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typedef int (*FuzzingTestFuncRaw)(const uint8_t*, size_t);
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#ifdef __AFL_COMPILER
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static int afl_interface_raw(const char* testFile,
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FuzzingTestFuncRaw testFunc) {
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char* buf = NULL;
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while (__AFL_LOOP(1000)) {
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std::ifstream is;
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is.open(testFile, std::ios::binary);
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is.seekg(0, std::ios::end);
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int len = is.tellg();
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is.seekg(0, std::ios::beg);
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MOZ_RELEASE_ASSERT(len >= 0);
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if (!len) {
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is.close();
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continue;
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}
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buf = (char*)realloc(buf, len);
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MOZ_RELEASE_ASSERT(buf);
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is.read(buf, len);
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is.close();
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testFunc((uint8_t*)buf, (size_t)len);
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}
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free(buf);
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return 0;
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}
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# define MOZ_AFL_INTERFACE_COMMON() \
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char* testFilePtr = getenv("MOZ_FUZZ_TESTFILE"); \
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if (!testFilePtr) { \
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fprintf(stderr, \
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"Must specify testfile in MOZ_FUZZ_TESTFILE environment " \
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"variable.\n"); \
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return 1; \
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} \
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/* Make a copy of testFilePtr so the testing function can safely call \
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* getenv \
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*/ \
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std::string testFile(testFilePtr);
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# define MOZ_AFL_INTERFACE_RAW(initFunc, testFunc, moduleName) \
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static int afl_fuzz_##moduleName(const uint8_t* data, size_t size) { \
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MOZ_RELEASE_ASSERT(data == NULL && size == 0); \
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MOZ_AFL_INTERFACE_COMMON(); \
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return ::mozilla::afl_interface_raw(testFile.c_str(), testFunc); \
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} \
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static void __attribute__((constructor)) AFLRegister##moduleName() { \
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::mozilla::FuzzerRegistry::getInstance().registerModule( \
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#moduleName, initFunc, afl_fuzz_##moduleName); \
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}
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#else
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# define MOZ_AFL_INTERFACE_RAW(initFunc, testFunc, moduleName) /* Nothing */
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#endif // __AFL_COMPILER
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#ifdef LIBFUZZER
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# define MOZ_LIBFUZZER_INTERFACE_RAW(initFunc, testFunc, moduleName) \
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static void __attribute__((constructor)) LibFuzzerRegister##moduleName() { \
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::mozilla::FuzzerRegistry::getInstance().registerModule( \
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#moduleName, initFunc, testFunc); \
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}
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#else
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# define MOZ_LIBFUZZER_INTERFACE_RAW(initFunc, testFunc, \
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moduleName) /* Nothing */
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#endif
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#define MOZ_FUZZING_INTERFACE_RAW(initFunc, testFunc, moduleName) \
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MOZ_LIBFUZZER_INTERFACE_RAW(initFunc, testFunc, moduleName); \
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MOZ_AFL_INTERFACE_RAW(initFunc, testFunc, moduleName);
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} // namespace mozilla
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#endif // FuzzingInterface_h__
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