| // Copyright 2022 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 "src/tint/bench/benchmark.h" |
| |
| #include <filesystem> |
| #include <iostream> |
| #include <utility> |
| #include <vector> |
| |
| #include "src/tint/utils/text/string.h" |
| #include "src/tint/utils/text/string_stream.h" |
| |
| namespace tint::bench { |
| namespace { |
| |
| std::filesystem::path kInputFileDir; |
| |
| /// Copies the content from the file named `input_file` to `buffer`, |
| /// assuming each element in the file is of type `T`. If any error occurs, |
| /// writes error messages to the standard error stream and returns false. |
| /// Assumes the size of a `T` object is divisible by its required alignment. |
| /// @returns true if we successfully read the file. |
| template <typename T> |
| std::variant<std::vector<T>, Error> ReadFile(const std::string& input_file) { |
| FILE* file = nullptr; |
| #if defined(_MSC_VER) |
| fopen_s(&file, input_file.c_str(), "rb"); |
| #else |
| file = fopen(input_file.c_str(), "rb"); |
| #endif |
| if (!file) { |
| return Error{"Failed to open " + input_file}; |
| } |
| |
| fseek(file, 0, SEEK_END); |
| const auto file_size = static_cast<size_t>(ftell(file)); |
| if (0 != (file_size % sizeof(T))) { |
| utils::StringStream err; |
| err << "File " << input_file |
| << " does not contain an integral number of objects: " << file_size |
| << " bytes in the file, require " << sizeof(T) << " bytes per object"; |
| fclose(file); |
| return Error{err.str()}; |
| } |
| fseek(file, 0, SEEK_SET); |
| |
| std::vector<T> buffer; |
| buffer.resize(file_size / sizeof(T)); |
| |
| size_t bytes_read = fread(buffer.data(), 1, file_size, file); |
| fclose(file); |
| if (bytes_read != file_size) { |
| return Error{"Failed to read " + input_file}; |
| } |
| |
| return buffer; |
| } |
| |
| bool FindBenchmarkInputDir() { |
| // Attempt to find the benchmark input files by searching up from the current |
| // working directory. |
| auto path = std::filesystem::current_path(); |
| while (std::filesystem::is_directory(path)) { |
| auto test = path / "test" / "tint" / "benchmark"; |
| if (std::filesystem::is_directory(test)) { |
| kInputFileDir = test; |
| return true; |
| } |
| auto parent = path.parent_path(); |
| if (path == parent) { |
| break; |
| } |
| path = parent; |
| } |
| return false; |
| } |
| |
| } // namespace |
| |
| std::variant<tint::Source::File, Error> LoadInputFile(std::string name) { |
| auto path = std::filesystem::path(name).is_absolute() ? name : (kInputFileDir / name).string(); |
| if (utils::HasSuffix(path, ".wgsl")) { |
| auto data = ReadFile<uint8_t>(path); |
| if (auto* buf = std::get_if<std::vector<uint8_t>>(&data)) { |
| return tint::Source::File(path, std::string(buf->begin(), buf->end())); |
| } |
| return std::get<Error>(data); |
| } |
| if (utils::HasSuffix(path, ".spv")) { |
| auto spirv = ReadFile<uint32_t>(path); |
| if (auto* buf = std::get_if<std::vector<uint32_t>>(&spirv)) { |
| auto program = tint::reader::spirv::Parse(*buf, {}); |
| if (!program.IsValid()) { |
| return Error{program.Diagnostics().str()}; |
| } |
| auto result = tint::writer::wgsl::Generate(&program, {}); |
| if (!result.success) { |
| return Error{result.error}; |
| } |
| return tint::Source::File(path, result.wgsl); |
| } |
| return std::get<Error>(spirv); |
| } |
| return Error{"unsupported file extension: '" + name + "'"}; |
| } |
| |
| std::variant<ProgramAndFile, Error> LoadProgram(std::string name) { |
| auto res = bench::LoadInputFile(name); |
| if (auto err = std::get_if<bench::Error>(&res)) { |
| return *err; |
| } |
| auto file = std::make_unique<Source::File>(std::move(std::get<Source::File>(res))); |
| auto program = reader::wgsl::Parse(file.get()); |
| if (program.Diagnostics().contains_errors()) { |
| return Error{program.Diagnostics().str()}; |
| } |
| return ProgramAndFile{std::move(program), std::move(file)}; |
| } |
| |
| } // namespace tint::bench |
| |
| int main(int argc, char** argv) { |
| benchmark::Initialize(&argc, argv); |
| if (benchmark::ReportUnrecognizedArguments(argc, argv)) { |
| return 1; |
| } |
| if (!tint::bench::FindBenchmarkInputDir()) { |
| std::cerr << "failed to locate benchmark input files" << std::endl; |
| return 1; |
| } |
| benchmark::RunSpecifiedBenchmarks(); |
| } |