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/* -*- 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
*/
#ifndef FuzzingInterface_h__
#define FuzzingInterface_h__
#include <fstream>
#ifdef LIBFUZZER
# include "FuzzerExtFunctions.h"
#endif
#include "FuzzerRegistry.h"
#include "mozilla/Assertions.h"
#ifndef JS_STANDALONE
# include "mozilla/Logging.h"
#endif
namespace mozilla {
#ifdef JS_STANDALONE
void fuzzing_log(const char* aFmt, ...);
# define MOZ_LOG_EXPAND_ARGS(...) __VA_ARGS__
# define FUZZING_LOG(args) fuzzing_log(MOZ_LOG_EXPAND_ARGS args);
#else
extern LazyLogModule gFuzzingLog;
# define FUZZING_LOG(args) \
MOZ_LOG(mozilla::gFuzzingLog, mozilla::LogLevel::Verbose, args)
#endif // JS_STANDALONE
typedef int (*FuzzingTestFuncRaw)(const uint8_t*, size_t);
#ifdef AFLFUZZ
static int afl_interface_raw(const char* testFile,
FuzzingTestFuncRaw testFunc) {
char* buf = NULL;
while (__AFL_LOOP(1000)) {
std::ifstream is;
is.open(testFile, std::ios::binary);
is.seekg(0, std::ios::end);
int len = is.tellg();
is.seekg(0, std::ios::beg);
MOZ_RELEASE_ASSERT(len >= 0);
if (!len) {
is.close();
continue;
}
buf = (char*)realloc(buf, len);
MOZ_RELEASE_ASSERT(buf);
is.read(buf, len);
is.close();
testFunc((uint8_t*)buf, (size_t)len);
}
free(buf);
return 0;
}
# define MOZ_AFL_INTERFACE_COMMON() \
char* testFilePtr = getenv("MOZ_FUZZ_TESTFILE"); \
if (!testFilePtr) { \
fprintf(stderr, \
"Must specify testfile in MOZ_FUZZ_TESTFILE environment " \
"variable.\n"); \
return 1; \
} \
/* Make a copy of testFilePtr so the testing function can safely call \
* getenv \
*/ \
std::string testFile(testFilePtr);
# define MOZ_AFL_INTERFACE_RAW(initFunc, testFunc, moduleName) \
static int afl_fuzz_##moduleName(const uint8_t* data, size_t size) { \
MOZ_RELEASE_ASSERT(data == NULL && size == 0); \
MOZ_AFL_INTERFACE_COMMON(); \
return ::mozilla::afl_interface_raw(testFile.c_str(), testFunc); \
} \
static void __attribute__((constructor)) AFLRegister##moduleName() { \
::mozilla::FuzzerRegistry::getInstance().registerModule( \
#moduleName, initFunc, afl_fuzz_##moduleName); \
}
#else
# define MOZ_AFL_INTERFACE_RAW(initFunc, testFunc, moduleName) /* Nothing */
#endif // AFLFUZZ
#ifdef LIBFUZZER
# define MOZ_LIBFUZZER_INTERFACE_RAW(initFunc, testFunc, moduleName) \
static void __attribute__((constructor)) LibFuzzerRegister##moduleName() { \
::mozilla::FuzzerRegistry::getInstance().registerModule( \
#moduleName, initFunc, testFunc); \
}
#else
# define MOZ_LIBFUZZER_INTERFACE_RAW(initFunc, testFunc, \
moduleName) /* Nothing */
#endif
#define MOZ_FUZZING_INTERFACE_RAW(initFunc, testFunc, moduleName) \
MOZ_LIBFUZZER_INTERFACE_RAW(initFunc, testFunc, moduleName); \
MOZ_AFL_INTERFACE_RAW(initFunc, testFunc, moduleName);
} // namespace mozilla
#endif // FuzzingInterface_h__
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