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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 <sstream>
#include <string>
#include <vector>
#include "fuzzers/random_generator.h"
#include "fuzzers/tint_spirv_tools_fuzzer/mutator.h"
#include "spirv-tools/libspirv.h"
namespace tint {
namespace fuzzers {
namespace spvtools_fuzzer {
/// Mutates the SPIR-V module using the spirv-opt tool.
/// The initial `binary` must be valid according to `target_env`. On each call
/// to the `Mutate` method the mutator selects `opt_batch_size` random
/// optimization passes (with substitutions) and applies them to the binary.
class SpirvOptMutator : public Mutator {
/// Constructor.
/// @param target_env - target environment for the `binary`.
/// @param seed - seed for the RNG.
/// @param binary - SPIR-V binary. Must be valid.
/// @param validate_after_each_opt - whether to validate the binary after each
/// optimization pass.
/// @param opt_batch_size - the maximum number of optimization passes that
/// will be applied in a single call to `Mutate`. If it's equal to 0 then
/// all available optimization passes are applied.
SpirvOptMutator(spv_target_env target_env,
uint32_t seed,
std::vector<uint32_t> binary,
bool validate_after_each_opt,
uint32_t opt_batch_size);
Result Mutate() override;
std::vector<uint32_t> GetBinary() const override;
void LogErrors(const std::string* path, uint32_t count) const override;
std::string GetErrors() const override;
// Number of times this mutator was executed.
uint32_t num_executions_;
// Whether the last execution left it in a valid state.
bool is_valid_;
// Target environment for the SPIR-V binary.
const spv_target_env target_env_;
// The original SPIR-V binary. Useful for debugging.
const std::vector<uint32_t> original_binary_;
// The seed for the RNG. Useful for debugging.
const uint32_t seed_;
// All the optimization passes available.
const std::vector<std::string> opt_passes_;
// The result of the optimization.
std::vector<uint32_t> optimized_binary_;
// Whether we need to validate the binary after each optimization pass.
const bool validate_after_each_opt_;
// The number of optimization passes to apply at once.
const uint32_t opt_batch_size_;
// All the errors produced by the optimizer.
std::stringstream errors_;
// The random number generator initialized with `seed_`.
RandomGenerator generator_;
} // namespace spvtools_fuzzer
} // namespace fuzzers
} // namespace tint