forked from mirrors/gecko-dev
a15a27b2f0
Differential Revision: https://phabricator.services.mozilla.com/D27701 --HG-- extra : moz-landing-system : lando
79 lines
3 KiB
C
79 lines
3 KiB
C
//===- FuzzerInterface.h - Interface header for the Fuzzer ------*- C++ -* ===//
|
|
//
|
|
// 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
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
// Define the interface between libFuzzer and the library being tested.
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// NOTE: the libFuzzer interface is thin and in the majority of cases
|
|
// you should not include this file into your target. In 95% of cases
|
|
// all you need is to define the following function in your file:
|
|
// extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size);
|
|
|
|
// WARNING: keep the interface in C.
|
|
|
|
#ifndef LLVM_FUZZER_INTERFACE_H
|
|
#define LLVM_FUZZER_INTERFACE_H
|
|
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif // __cplusplus
|
|
|
|
// Define FUZZER_INTERFACE_VISIBILITY to set default visibility in a way that
|
|
// doesn't break MSVC.
|
|
#if defined(_WIN32)
|
|
#define FUZZER_INTERFACE_VISIBILITY __declspec(dllexport)
|
|
#else
|
|
#define FUZZER_INTERFACE_VISIBILITY __attribute__((visibility("default")))
|
|
#endif
|
|
|
|
// Mandatory user-provided target function.
|
|
// Executes the code under test with [Data, Data+Size) as the input.
|
|
// libFuzzer will invoke this function *many* times with different inputs.
|
|
// Must return 0.
|
|
FUZZER_INTERFACE_VISIBILITY int
|
|
LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size);
|
|
|
|
// Optional user-provided initialization function.
|
|
// If provided, this function will be called by libFuzzer once at startup.
|
|
// It may read and modify argc/argv.
|
|
// Must return 0.
|
|
FUZZER_INTERFACE_VISIBILITY int LLVMFuzzerInitialize(int *argc, char ***argv);
|
|
|
|
// Optional user-provided custom mutator.
|
|
// Mutates raw data in [Data, Data+Size) inplace.
|
|
// Returns the new size, which is not greater than MaxSize.
|
|
// Given the same Seed produces the same mutation.
|
|
FUZZER_INTERFACE_VISIBILITY size_t
|
|
LLVMFuzzerCustomMutator(uint8_t *Data, size_t Size, size_t MaxSize,
|
|
unsigned int Seed);
|
|
|
|
// Optional user-provided custom cross-over function.
|
|
// Combines pieces of Data1 & Data2 together into Out.
|
|
// Returns the new size, which is not greater than MaxOutSize.
|
|
// Should produce the same mutation given the same Seed.
|
|
FUZZER_INTERFACE_VISIBILITY size_t
|
|
LLVMFuzzerCustomCrossOver(const uint8_t *Data1, size_t Size1,
|
|
const uint8_t *Data2, size_t Size2, uint8_t *Out,
|
|
size_t MaxOutSize, unsigned int Seed);
|
|
|
|
// Experimental, may go away in future.
|
|
// libFuzzer-provided function to be used inside LLVMFuzzerCustomMutator.
|
|
// Mutates raw data in [Data, Data+Size) inplace.
|
|
// Returns the new size, which is not greater than MaxSize.
|
|
FUZZER_INTERFACE_VISIBILITY size_t
|
|
LLVMFuzzerMutate(uint8_t *Data, size_t Size, size_t MaxSize);
|
|
|
|
#undef FUZZER_INTERFACE_VISIBILITY
|
|
|
|
#ifdef __cplusplus
|
|
} // extern "C"
|
|
#endif // __cplusplus
|
|
|
|
#endif // LLVM_FUZZER_INTERFACE_H
|