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// Copyright 2023 The Dawn & Tint Authors
//
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// 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.
//
// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// 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.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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#include "src/tint/cmd/fuzz/wgsl/fuzz.h"
#include <iostream>
#include <thread>
#include "src/tint/lang/wgsl/reader/reader.h"
#include "src/tint/utils/containers/vector.h"
#include "src/tint/utils/macros/defer.h"
#include "src/tint/utils/macros/static_init.h"
namespace tint::fuzz::wgsl {
namespace {
/// @returns a reference to the static list of registered ProgramFuzzers.
/// @note this is not a global, as the static initializers that register fuzzers may be called
/// before this vector is constructed.
Vector<ProgramFuzzer, 32>& Fuzzers() {
static Vector<ProgramFuzzer, 32> fuzzers;
return fuzzers;
}
thread_local std::string_view currently_running;
[[noreturn]] void TintInternalCompilerErrorReporter(const tint::InternalCompilerError& err) {
std::cerr << "ICE while running fuzzer: '" << currently_running << "'" << std::endl;
std::cerr << err.Error() << std::endl;
__builtin_trap();
}
} // namespace
void Register(const ProgramFuzzer& fuzzer) {
Fuzzers().Push(fuzzer);
}
void Run(std::string_view wgsl, Slice<const std::byte> data, const Options& options) {
tint::SetInternalCompilerErrorReporter(&TintInternalCompilerErrorReporter);
// Ensure that fuzzers are sorted. Without this, the fuzzers may be registered in any order,
// leading to non-determinism, which we must avoid.
TINT_STATIC_INIT(Fuzzers().Sort([](auto& a, auto& b) { return a.name < b.name; }));
// Create a Source::File to hand to the parser.
tint::Source::File file("test.wgsl", wgsl);
// Parse the WGSL program.
auto program = tint::wgsl::reader::Parse(&file);
if (!program.IsValid()) {
return;
}
// Run each of the program fuzzer functions
if (options.run_concurrently) {
size_t n = Fuzzers().Length();
tint::Vector<std::thread, 32> threads;
threads.Resize(n);
for (size_t i = 0; i < n; i++) {
threads[i] = std::thread([i, &program, &data] {
auto& fuzzer = Fuzzers()[i];
currently_running = fuzzer.name;
fuzzer.fn(program, data);
});
}
for (auto& thread : threads) {
thread.join();
}
} else {
TINT_DEFER(currently_running = "");
for (auto& fuzzer : Fuzzers()) {
currently_running = fuzzer.name;
fuzzer.fn(program, data);
}
}
}
} // namespace tint::fuzz::wgsl