Source/WebGPU/WGSL/wgslfuzz.cpp

/*
 * Copyright (c) 2023 Apple Inc. All rights reserved.
 *
 * 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.
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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 */

#include "config.h"

#include "AST/ASTStringDumper.h"
#include "WGSL.h"
#include "WGSLShaderModule.h"
#include <wtf/DataLog.h>
#include <wtf/FileSystem.h>
#include <wtf/WTFProcess.h>

extern "C" {
int LLVMFuzzerTestOneInput(const uint8_t *data, size_t);
int LLVMFuzzerInitialize(int *argc, char ***argv);
} // extern "C"

int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
{
    WTF::initializeMainThread();

    WGSL::Configuration configuration;
    auto source = String::fromUTF8WithLatin1Fallback(byteCast<char8_t>(std::span { data, size }));
    auto checkResult = WGSL::staticCheck(source, std::nullopt, configuration);
    if (auto* successfulCheck = std::get_if<WGSL::SuccessfulCheck>(&checkResult)) {
        auto& shaderModule = successfulCheck->ast;
        WGSL::prepare(shaderModule, "main"_str, nullptr);
    }

    return 0;
}