| // Copyright 2016 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // A fuzzer that checks correctness of json parser/writer. |
| // The fuzzer input is passed through parsing twice, |
| // so that presumably valid json is parsed/written again. |
| |
| #include <string> |
| |
| #include "base/json/json_reader.h" |
| #include "base/json/json_writer.h" |
| #include "base/json/string_escape.h" |
| #include "base/logging.h" |
| #include "base/values.h" |
| #include "starboard/memory.h" |
| #include "starboard/types.h" |
| |
| // Entry point for libFuzzer. |
| // We will use the last byte of data as parsing options. |
| // The rest will be used as text input to the parser. |
| extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) { |
| if (size < 2) |
| return 0; |
| |
| int error_code, error_line, error_column; |
| std::string error_message; |
| |
| // Create a copy of input buffer, as otherwise we don't catch |
| // overflow that touches the last byte (which is used in options). |
| std::unique_ptr<char[]> input(new char[size - 1]); |
| SbMemoryCopy(input.get(), data, size - 1); |
| |
| base::StringPiece input_string(input.get(), size - 1); |
| |
| const int options = data[size - 1]; |
| auto parsed_value = base::JSONReader::ReadAndReturnError( |
| input_string, options, &error_code, &error_message, &error_line, |
| &error_column); |
| if (!parsed_value) |
| return 0; |
| |
| std::string parsed_output; |
| bool b = base::JSONWriter::Write(*parsed_value, &parsed_output); |
| LOG_ASSERT(b); |
| |
| auto double_parsed_value = base::JSONReader::ReadAndReturnError( |
| parsed_output, options, &error_code, &error_message, &error_line, |
| &error_column); |
| LOG_ASSERT(double_parsed_value); |
| std::string double_parsed_output; |
| bool b2 = |
| base::JSONWriter::Write(*double_parsed_value, &double_parsed_output); |
| LOG_ASSERT(b2); |
| |
| LOG_ASSERT(parsed_output == double_parsed_output) |
| << "Parser/Writer mismatch." |
| << "\nInput=" << base::GetQuotedJSONString(parsed_output) |
| << "\nOutput=" << base::GetQuotedJSONString(double_parsed_output); |
| |
| return 0; |
| } |