Source/JavaScriptCore/tools/FunctionOverrides.h

/*
 * Copyright (C) 2015-2016 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
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#pragma once

#include "SourceCode.h"
#include <wtf/HashMap.h>
#include <wtf/Lock.h>
#include <wtf/text/WTFString.h>

namespace JSC {

class ScriptExecutable;

struct FunctionOverrideInfo {
    SourceCode sourceCode;
    unsigned firstLine;
    unsigned lineCount;
    unsigned startColumn;
    unsigned endColumn;
    unsigned parametersStartOffset;
    unsigned typeProfilingStartOffset;
    unsigned typeProfilingEndOffset;
};

class FunctionOverrides {
public:
    using OverrideInfo = FunctionOverrideInfo;

    static FunctionOverrides& overrides();
    FunctionOverrides(const char* functionOverridesFileName);

    static bool initializeOverrideFor(const SourceCode& origCode, OverrideInfo& result);

    JS_EXPORT_PRIVATE static void reinstallOverrides();

private:
    void parseOverridesInFile(const char* fileName) WTF_REQUIRES_LOCK(m_lock);
    void clear() WTF_REQUIRES_LOCK(m_lock) { m_entries.clear(); }

    HashMap<String, String> m_entries WTF_GUARDED_BY_LOCK(m_lock);
    Lock m_lock;
};

} // namespace JSC