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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
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// See the License for the specific language governing permissions and
// limitations under the License.
#include <cassert>
#include <cstring>
#include <memory>
#include <string>
#include <utility>
#include <vector>
#include "include/tint/tint.h"
#include "src/tint/fuzzers/data_builder.h"
namespace tint::fuzzers {
// TODO( Add using shader reflection to generate options
// that are potentially valid for Generate*Options
// functions.
/// Generates random set of options for SPIRV generation
void GenerateSpirvOptions(DataBuilder* b, writer::spirv::Options* options);
/// Generates random set of options for WGSL generation
void GenerateWgslOptions(DataBuilder* b, writer::wgsl::Options* options);
/// Generates random set of options for HLSL generation
void GenerateHlslOptions(DataBuilder* b, writer::hlsl::Options* options);
/// Generates random set of options for MSL generation
void GenerateMslOptions(DataBuilder* b, writer::msl::Options* options);
/// Shader language the fuzzer is reading
enum class InputFormat { kWGSL, kSpv };
/// Shader language the fuzzer is emitting
enum class OutputFormat { kWGSL, kSpv, kHLSL, kMSL };
/// Generic runner for reading and emitting shaders using Tint, used by most
/// fuzzers to share common code.
class CommonFuzzer {
/// Constructor
/// @param input shader language being read
/// @param output shader language being emitted
CommonFuzzer(InputFormat input, OutputFormat output);
/// Destructor
/// @param tm manager for transforms to run
/// @param inputs data for transforms to run
void SetTransformManager(transform::Manager* tm, transform::DataMap* inputs) {
assert((!tm || inputs) && "DataMap must be !nullptr if Manager !nullptr");
transform_manager_ = tm;
transform_inputs_ = inputs;
/// @param enabled if the input shader for run should be outputted to the log
void SetDumpInput(bool enabled) { dump_input_ = enabled; }
/// @param enabled if the shader being valid after parsing is being enforced.
/// If false, invalidation of the shader will cause an early exit, but not
/// throw an error.
/// If true invalidation will throw an error that is caught by libFuzzer and
/// will generate a crash report.
void SetEnforceValidity(bool enabled) { enforce_validity = enabled; }
/// Convert given shader from input to output format.
/// Will also apply provided transforms and run the inspector over the result.
/// @param data buffer of data that will interpreted as a byte array or string
/// depending on the shader input format.
/// @param size number of elements in buffer
/// @returns 0, this is what libFuzzer expects
int Run(const uint8_t* data, size_t size);
/// @returns diagnostic messages generated while Run() is executed.
const tint::diag::List& Diagnostics() const { return diagnostics_; }
/// @returns if there are any errors in the diagnostic messages
bool HasErrors() const { return diagnostics_.contains_errors(); }
/// @returns generated SPIR-V binary, if SPIR-V was emitted.
const std::vector<uint32_t>& GetGeneratedSpirv() const { return generated_spirv_; }
/// @returns generated WGSL string, if WGSL was emitted.
const std::string& GetGeneratedWgsl() const { return generated_wgsl_; }
/// @returns generated HLSL string, if HLSL was emitted.
const std::string& GetGeneratedHlsl() const { return generated_hlsl_; }
/// @returns generated MSL string, if HLSL was emitted.
const std::string& GetGeneratedMsl() const { return generated_msl_; }
/// @param options SPIR-V emission options
void SetOptionsSpirv(const writer::spirv::Options& options) { options_spirv_ = options; }
/// @param options WGSL emission options
void SetOptionsWgsl(const writer::wgsl::Options& options) { options_wgsl_ = options; }
/// @param options HLSL emission options
void SetOptionsHlsl(const writer::hlsl::Options& options) { options_hlsl_ = options; }
/// @param options MSL emission options
void SetOptionsMsl(const writer::msl::Options& options) { options_msl_ = options; }
InputFormat input_;
OutputFormat output_;
transform::Manager* transform_manager_ = nullptr;
transform::DataMap* transform_inputs_ = nullptr;
bool dump_input_ = false;
tint::diag::List diagnostics_;
bool enforce_validity = false;
std::vector<uint32_t> generated_spirv_;
std::string generated_wgsl_;
std::string generated_hlsl_;
std::string generated_msl_;
writer::spirv::Options options_spirv_;
writer::wgsl::Options options_wgsl_;
writer::hlsl::Options options_hlsl_;
writer::msl::Options options_msl_;
/// The source file needs to live at least as long as #diagnostics_
std::unique_ptr<Source::File> file_;
/// Runs a series of reflection operations to exercise the Inspector API.
void RunInspector(Program* program);
} // namespace tint::fuzzers