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// 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 <filesystem>
#include <iostream>
#include <utility>
#include <vector>
#include "src/tint/cmd/bench/bench.h"
#include "src/tint/lang/spirv/reader/reader.h"
#include "src/tint/lang/wgsl/reader/reader.h"
#include "src/tint/lang/wgsl/writer/writer.h"
#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))) {
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 (tint::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 (tint::HasSuffix(path, ".spv")) {
auto spirv = ReadFile<uint32_t>(path);
if (auto* buf = std::get_if<std::vector<uint32_t>>(&spirv)) {
auto program = tint::spirv::reader::Read(*buf, {});
if (!program.IsValid()) {
return Error{program.Diagnostics().str()};
}
auto result = tint::wgsl::writer::Generate(&program, {});
if (!result) {
return Error{result.Failure()};
}
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 = wgsl::reader::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();
}