Source/JavaScriptCore/bindings/ScriptFunctionCall.cpp

/*
 * Copyright (C) 2013-2021 Apple Inc. All rights reserved.
 * Copyright (C) 2009 Google 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:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * 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
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 * 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" 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 THE COPYRIGHT
 * OWNER 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,
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#include "config.h"
#include "ScriptFunctionCall.h"

#include "JSCInlines.h"
#include "JSLock.h"
#include <wtf/text/WTFString.h>

namespace Deprecated {

using namespace JSC;

void ScriptCallArgumentHandler::appendArgument(const String& argument)
{
    VM& vm = m_globalObject->vm();
    JSLockHolder lock(vm);
    m_arguments.append(jsString(vm, argument));
}

void ScriptCallArgumentHandler::appendArgument(const char* argument)
{
    VM& vm = m_globalObject->vm();
    JSLockHolder lock(vm);
    m_arguments.append(jsString(vm, String::fromLatin1(argument)));
}

void ScriptCallArgumentHandler::appendArgument(JSValue argument)
{
    m_arguments.append(argument);
}

void ScriptCallArgumentHandler::appendArgument(long argument)
{
    JSLockHolder lock(m_globalObject);
    m_arguments.append(jsNumber(argument));
}

void ScriptCallArgumentHandler::appendArgument(long long argument)
{
    JSLockHolder lock(m_globalObject);
    m_arguments.append(jsNumber(argument));
}

void ScriptCallArgumentHandler::appendArgument(unsigned int argument)
{
    JSLockHolder lock(m_globalObject);
    m_arguments.append(jsNumber(argument));
}

void ScriptCallArgumentHandler::appendArgument(uint64_t argument)
{
    JSLockHolder lock(m_globalObject);
    m_arguments.append(jsNumber(argument));
}

void ScriptCallArgumentHandler::appendArgument(int argument)
{
    JSLockHolder lock(m_globalObject);
    m_arguments.append(jsNumber(argument));
}

void ScriptCallArgumentHandler::appendArgument(bool argument)
{
    m_arguments.append(jsBoolean(argument));
}

ScriptFunctionCall::ScriptFunctionCall(const Deprecated::ScriptObject& thisObject, const String& name, ScriptFunctionCallHandler callHandler)
    : ScriptCallArgumentHandler(thisObject.globalObject())
    , m_callHandler(callHandler)
    , m_thisObject(thisObject)
    , m_name(name)
{
}

Expected<JSValue, NakedPtr<Exception>> ScriptFunctionCall::call()
{
    JSObject* thisObject = m_thisObject.jsObject();

    VM& vm = m_globalObject->vm();
    JSLockHolder lock(vm);
    auto scope = DECLARE_CATCH_SCOPE(vm);

    auto makeExceptionResult = [&] (Exception* exception) -> Expected<JSValue, NakedPtr<Exception>> {
        // Do not treat a terminated execution exception as having an exception. Just treat it as an empty result.
        if (!vm.isTerminationException(exception))
            return makeUnexpected(exception);
        return { };
    };

    JSValue function = thisObject->get(m_globalObject, Identifier::fromString(vm, m_name));
    Exception* exception = scope.exception();
    if (UNLIKELY(exception)) {
        scope.clearException();
        return makeExceptionResult(exception);
    }

    auto callData = JSC::getCallData(function);
    if (callData.type == CallData::Type::None)
        return { };

    JSValue result;
    NakedPtr<Exception> uncaughtException;
    if (m_callHandler)
        result = m_callHandler(m_globalObject, function, callData, thisObject, m_arguments, uncaughtException);
    else
        result = JSC::call(m_globalObject, function, callData, thisObject, m_arguments, uncaughtException);

    if (uncaughtException)
        return makeExceptionResult(uncaughtException);

    return result;
}

} // namespace Deprecated