| // Copyright 2021 The Tint Authors. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #include <cassert> |
| #include <cstddef> |
| #include <cstdint> |
| |
| #include "fuzzers/tint_common_fuzzer.h" |
| #include "fuzzers/tint_regex_fuzzer/cli.h" |
| #include "fuzzers/tint_regex_fuzzer/util.h" |
| #include "fuzzers/tint_regex_fuzzer/wgsl_mutator.h" |
| |
| #include "src/reader/wgsl/parser.h" |
| #include "src/writer/wgsl/generator.h" |
| |
| namespace tint { |
| namespace fuzzers { |
| namespace regex_fuzzer { |
| namespace { |
| |
| CliParams cli_params{}; |
| |
| enum class MutationKind { |
| kSwapIntervals, |
| kDeleteInterval, |
| kDuplicateInterval, |
| kNumMutationKinds |
| }; |
| |
| extern "C" int LLVMFuzzerInitialize(int* argc, char*** argv) { |
| // Parse CLI parameters. `ParseCliParams` will call `exit` if some parameter |
| // is invalid. |
| cli_params = ParseCliParams(argc, *argv); |
| return 0; |
| } |
| |
| extern "C" size_t LLVMFuzzerCustomMutator(uint8_t* data, |
| size_t size, |
| size_t max_size, |
| unsigned seed) { |
| std::string wgsl_code(data, data + size); |
| const std::vector<std::string> delimiters{";"}; |
| std::mt19937 generator(seed); |
| |
| std::string delimiter = |
| delimiters[GetRandomIntFromRange(0, delimiters.size() - 1, generator)]; |
| |
| MutationKind mutation_kind = static_cast<MutationKind>(GetRandomIntFromRange( |
| 0, static_cast<size_t>(MutationKind::kNumMutationKinds) - 1, generator)); |
| |
| switch (mutation_kind) { |
| case MutationKind::kSwapIntervals: |
| if (!SwapRandomIntervals(delimiter, wgsl_code, generator)) { |
| return 0; |
| } |
| break; |
| |
| case MutationKind::kDeleteInterval: |
| if (!DeleteRandomInterval(delimiter, wgsl_code, generator)) { |
| return 0; |
| } |
| break; |
| |
| case MutationKind::kDuplicateInterval: |
| if (!DuplicateRandomInterval(delimiter, wgsl_code, generator)) { |
| return 0; |
| } |
| break; |
| |
| default: |
| assert(false && "Unreachable"); |
| return 0; |
| } |
| |
| if (wgsl_code.size() > max_size) { |
| return 0; |
| } |
| |
| memcpy(data, wgsl_code.c_str(), wgsl_code.size()); |
| return wgsl_code.size(); |
| } |
| |
| extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) { |
| if (size == 0) { |
| return 0; |
| } |
| |
| struct Target { |
| FuzzingTarget fuzzing_target; |
| OutputFormat output_format; |
| const char* name; |
| }; |
| |
| Target targets[] = {{FuzzingTarget::kWgsl, OutputFormat::kWGSL, "WGSL"}, |
| {FuzzingTarget::kHlsl, OutputFormat::kHLSL, "HLSL"}, |
| {FuzzingTarget::kMsl, OutputFormat::kMSL, "MSL"}, |
| {FuzzingTarget::kSpv, OutputFormat::kSpv, "SPV"}}; |
| |
| for (auto target : targets) { |
| if ((target.fuzzing_target & cli_params.fuzzing_target) != |
| target.fuzzing_target) { |
| continue; |
| } |
| |
| CommonFuzzer fuzzer(InputFormat::kWGSL, target.output_format); |
| fuzzer.EnableInspector(); |
| fuzzer.Run(data, size); |
| } |
| |
| return 0; |
| } |
| |
| } // namespace |
| } // namespace regex_fuzzer |
| } // namespace fuzzers |
| } // namespace tint |