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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.
#ifndef FUZZERS_TINT_COMMON_FUZZER_H_
#define FUZZERS_TINT_COMMON_FUZZER_H_
#include <cstring>
#include <memory>
#include <string>
#include <utility>
#include <vector>
#include "include/tint/tint.h"
namespace tint {
namespace fuzzers {
class Reader {
public:
Reader(const uint8_t* data, size_t size);
bool failed() { return failed_; }
const uint8_t* data() { return data_; }
size_t size() { return size_; }
template <typename T>
T read() {
T out{};
read(&out, sizeof(T));
return out;
}
std::string string();
template <typename T>
std::vector<T> vector() {
auto count = read<uint8_t>();
if (failed_ || size_ < count) {
mark_failed();
return {};
}
std::vector<T> out(count);
memcpy(out.data(), data_, count * sizeof(T));
data_ += count * sizeof(T);
size_ -= count * sizeof(T);
return out;
}
template <typename T>
std::vector<T> vector(T (*extract)(Reader*)) {
auto count = read<uint8_t>();
if (size_ < count) {
mark_failed();
return {};
}
std::vector<T> out(count);
for (uint8_t i = 0; i < count; i++) {
out[i] = extract(this);
}
return out;
}
template <typename T>
T enum_class(uint8_t count) {
auto val = read<uint8_t>();
return static_cast<T>(val % count);
}
private:
void mark_failed();
void read(void* out, size_t n);
const uint8_t* data_;
size_t size_;
bool failed_ = false;
};
void ExtractBindingRemapperInputs(Reader* r, tint::transform::DataMap* inputs);
void ExtractFirstIndexOffsetInputs(Reader* r, tint::transform::DataMap* inputs);
void ExtractSingleEntryPointInputs(Reader* r, tint::transform::DataMap* inputs);
void ExtractVertexPullingInputs(Reader* r, tint::transform::DataMap* inputs);
enum class InputFormat { kWGSL, kSpv, kNone };
enum class OutputFormat { kWGSL, kSpv, kHLSL, kMSL, kNone };
class CommonFuzzer {
public:
explicit CommonFuzzer(InputFormat input, OutputFormat output);
~CommonFuzzer();
void SetTransformManager(transform::Manager* tm, transform::DataMap inputs) {
transform_manager_ = tm;
transform_inputs_ = std::move(inputs);
}
void EnableInspector() { inspector_enabled_ = true; }
int Run(const uint8_t* data, size_t size);
const writer::Writer* GetWriter() const;
const std::string& GetErrors() const { return errors_; }
bool HasErrors() const { return !errors_.empty(); }
private:
InputFormat input_;
OutputFormat output_;
std::unique_ptr<writer::Writer> writer_;
transform::Manager* transform_manager_;
transform::DataMap transform_inputs_;
bool inspector_enabled_;
std::string errors_;
};
} // namespace fuzzers
} // namespace tint
#endif // FUZZERS_TINT_COMMON_FUZZER_H_