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// 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 <cstdio>
#include <fstream>
#include <iostream>
#include <string>
#include <vector>
#include "fuzzers/tint_common_fuzzer.h"
namespace {
/// Controls the target language in which code will be generated.
enum class TargetLanguage {
kHlsl,
kMsl,
kSpv,
kWgsl,
kTargetLanguageMax,
};
/// 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>
bool ReadFile(const std::string& input_file, std::vector<T>* buffer) {
if (!buffer) {
std::cerr << "The buffer pointer was null" << std::endl;
return false;
}
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) {
std::cerr << "Failed to open " << input_file << std::endl;
return false;
}
fseek(file, 0, SEEK_END);
auto tell_file_size = ftell(file);
if (tell_file_size <= 0) {
std::cerr << "Input file of incorrect size: " << input_file << std::endl;
fclose(file);
return {};
}
const auto file_size = static_cast<size_t>(tell_file_size);
if (0 != (file_size % sizeof(T))) {
std::cerr << "File " << input_file
<< " does not contain an integral number of objects: "
<< file_size << " bytes in the file, require " << sizeof(T)
<< " bytes per object" << std::endl;
fclose(file);
return false;
}
fseek(file, 0, SEEK_SET);
buffer->clear();
buffer->resize(file_size / sizeof(T));
size_t bytes_read = fread(buffer->data(), 1, file_size, file);
fclose(file);
if (bytes_read != file_size) {
std::cerr << "Failed to read " << input_file << std::endl;
return false;
}
return true;
}
} // namespace
int main(int argc, const char** argv) {
if (argc < 2 || argc > 3) {
std::cerr << "Usage: " << argv[0] << " <input file> [hlsl|msl|spv|wgsl]"
<< std::endl;
return 1;
}
std::string input_filename(argv[1]);
std::vector<uint8_t> data;
if (!ReadFile<uint8_t>(input_filename, &data)) {
return 1;
}
if (data.empty()) {
return 0;
}
tint::fuzzers::DataBuilder builder(data.data(), data.size());
TargetLanguage target_language;
if (argc == 3) {
std::string target_language_string = argv[2];
if (target_language_string == "hlsl") {
target_language = TargetLanguage::kHlsl;
} else if (target_language_string == "msl") {
target_language = TargetLanguage::kMsl;
} else if (target_language_string == "spv") {
target_language = TargetLanguage::kSpv;
} else {
assert(target_language_string == "wgsl" && "Unknown target language.");
target_language = TargetLanguage::kWgsl;
}
} else {
target_language = builder.enum_class<TargetLanguage>(
static_cast<uint32_t>(TargetLanguage::kTargetLanguageMax));
}
switch (target_language) {
case TargetLanguage::kHlsl: {
tint::fuzzers::CommonFuzzer fuzzer(tint::fuzzers::InputFormat::kWGSL,
tint::fuzzers::OutputFormat::kHLSL);
return fuzzer.Run(data.data(), data.size());
}
case TargetLanguage::kMsl: {
tint::writer::msl::Options options;
GenerateMslOptions(&builder, &options);
tint::fuzzers::CommonFuzzer fuzzer(tint::fuzzers::InputFormat::kWGSL,
tint::fuzzers::OutputFormat::kMSL);
fuzzer.SetOptionsMsl(options);
return fuzzer.Run(data.data(), data.size());
}
case TargetLanguage::kSpv: {
tint::writer::spirv::Options options;
GenerateSpirvOptions(&builder, &options);
tint::fuzzers::CommonFuzzer fuzzer(tint::fuzzers::InputFormat::kWGSL,
tint::fuzzers::OutputFormat::kSpv);
fuzzer.SetOptionsSpirv(options);
return fuzzer.Run(data.data(), data.size());
}
case TargetLanguage::kWgsl: {
tint::fuzzers::CommonFuzzer fuzzer(tint::fuzzers::InputFormat::kWGSL,
tint::fuzzers::OutputFormat::kWGSL);
return fuzzer.Run(data.data(), data.size());
}
default:
std::cerr << "Aborting due to unknown target language; fuzzer must be "
"misconfigured."
<< std::endl;
abort();
}
}