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// Copyright 2023 The Dawn & Tint Authors
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
// list of conditions and the following disclaimer.
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// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
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// 3. Neither the name of the copyright holder nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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#ifndef SRC_TINT_CMD_FUZZ_IR_FUZZ_H_
#define SRC_TINT_CMD_FUZZ_IR_FUZZ_H_
#include <functional>
#include <string>
#include <tuple>
#include <utility>
#include "src/tint/utils/bytes/decoder.h"
#include "src/tint/utils/containers/slice.h"
#include "src/tint/utils/macros/static_init.h"
namespace tint::core::ir {
class Module;
}
namespace tint::fuzz::ir {
/// IRFuzzer describes a fuzzer function that takes a IR module as input
struct IRFuzzer {
/// @param name the name of the fuzzer
/// @param fn the fuzzer function
/// @returns an IRFuzzer that invokes the function @p fn with the IR module, along with any
/// additional arguments which are deserialized from the fuzzer input.
template <typename... ARGS>
static IRFuzzer Create(std::string_view name, void (*fn)(core::ir::Module&, ARGS...)) {
if constexpr (sizeof...(ARGS) > 0) {
auto fn_with_decode = [fn](core::ir::Module& module, Slice<const std::byte> data) {
if (!data.data) {
return;
}
bytes::BufferReader reader{data};
auto data_args = bytes::Decode<std::tuple<std::decay_t<ARGS>...>>(reader);
if (data_args == Success) {
auto all_args =
std::tuple_cat(std::tuple<core::ir::Module&>{module}, data_args.Get());
std::apply(*fn, all_args);
}
};
return IRFuzzer{name, std::move(fn_with_decode)};
} else {
return IRFuzzer{
name,
[fn](core::ir::Module& module, Slice<const std::byte>) { fn(module); },
};
}
}
/// Name of the fuzzer function
std::string_view name;
/// The fuzzer function
std::function<void(core::ir::Module&, Slice<const std::byte> data)> fn;
};
/// Registers the fuzzer function with the IR fuzzer executable.
/// @param fuzzer the fuzzer
void Register([[maybe_unused]] const IRFuzzer& fuzzer);
/// TINT_IR_MODULE_FUZZER registers the fuzzer function.
#define TINT_IR_MODULE_FUZZER(FUNCTION) \
TINT_STATIC_INIT( \
::tint::fuzz::ir::Register(::tint::fuzz::ir::IRFuzzer::Create(#FUNCTION, FUNCTION)))
} // namespace tint::fuzz::ir
#endif // SRC_TINT_CMD_FUZZ_IR_FUZZ_H_