llvm/libc/fuzzing/stdio/printf_parser_fuzz.cpp

//===-- printf_parser_fuzz.cpp --------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
///
/// Fuzzing test for llvm-libc qsort implementation.
///
//===----------------------------------------------------------------------===//

#include "src/__support/arg_list.h"
#include "src/stdio/printf_core/parser.h"

#include <stdarg.h>
#include <stdint.h>

usingnamespaceLIBC_NAMESPACE;

// The design for the printf parser fuzzer is fairly simple. The parser uses a
// mock arg list that will never fail, and is passed a randomized string. The
// format sections it outputs are checked against a count of the number of '%'
// signs are in the original string. This is a fairly basic test, and the main
// intent is to run this under sanitizers, which will check for buffer overruns.
extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) { … }