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/*
* Copyright (C) 2013-2017 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. AND ITS 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 APPLE INC. OR ITS 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 (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "JSMicrotask.h"
#include "CatchScope.h"
#include "Debugger.h"
#include "DeferTermination.h"
#include "JSGlobalObject.h"
#include "JSObjectInlines.h"
#include "Microtask.h"
#include "StrongInlines.h"
#include "VMTrapsInlines.h"
WTF_ALLOW_UNSAFE_BUFFER_USAGE_BEGIN
namespace JSC {
class JSMicrotask final : public Microtask {
public:
static constexpr unsigned maxArguments = 4;
JSMicrotask(VM& vm, JSValue job, JSValue argument0, JSValue argument1, JSValue argument2, JSValue argument3)
{
m_job.set(vm, job);
if (argument0 && !argument0.isUndefined())
m_arguments[0].set(vm, argument0);
if (argument1 && !argument1.isUndefined())
m_arguments[1].set(vm, argument1);
if (argument2 && !argument2.isUndefined())
m_arguments[2].set(vm, argument2);
if (argument3 && !argument3.isUndefined())
m_arguments[3].set(vm, argument3);
}
private:
void run(JSGlobalObject*) final;
Strong<Unknown> m_job;
Strong<Unknown> m_arguments[maxArguments];
};
Ref<Microtask> createJSMicrotask(VM& vm, JSValue job, JSValue argument0, JSValue argument1, JSValue argument2, JSValue argument3)
{
return adoptRef(*new JSMicrotask(vm, job, argument0, argument1, argument2, argument3));
}
void runJSMicrotask(JSGlobalObject* globalObject, MicrotaskIdentifier identifier, JSValue job, JSValue argument0, JSValue argument1, JSValue argument2, JSValue argument3)
{
VM& vm = globalObject->vm();
auto scope = DECLARE_CATCH_SCOPE(vm);
// If termination is issued, do not run microtasks. Otherwise, microtask should not care about exceptions.
if (UNLIKELY(!scope.clearExceptionExceptTermination()))
return;
auto handlerCallData = JSC::getCallData(job);
if (UNLIKELY(!scope.clearExceptionExceptTermination()))
return;
ASSERT(handlerCallData.type != CallData::Type::None);
MarkedArgumentBuffer handlerArguments;
handlerArguments.append(!argument0 ? jsUndefined() : argument0);
handlerArguments.append(!argument1 ? jsUndefined() : argument1);
handlerArguments.append(!argument2 ? jsUndefined() : argument2);
handlerArguments.append(!argument3 ? jsUndefined() : argument3);
if (UNLIKELY(handlerArguments.hasOverflowed()))
return;
if (UNLIKELY(globalObject->hasDebugger())) {
DeferTerminationForAWhile deferTerminationForAWhile(vm);
globalObject->debugger()->willRunMicrotask(globalObject, identifier);
scope.clearException();
}
if (LIKELY(!vm.hasPendingTerminationException())) {
profiledCall(globalObject, ProfilingReason::Microtask, job, handlerCallData, jsUndefined(), handlerArguments);
scope.clearExceptionExceptTermination();
}
if (UNLIKELY(globalObject->hasDebugger())) {
DeferTerminationForAWhile deferTerminationForAWhile(vm);
globalObject->debugger()->didRunMicrotask(globalObject, identifier);
scope.clearException();
}
}
void JSMicrotask::run(JSGlobalObject* globalObject)
{
runJSMicrotask(globalObject, identifier(), m_job.get(), m_arguments[0].get(), m_arguments[1].get(), m_arguments[2].get(), m_arguments[3].get());
}
} // namespace JSC
WTF_ALLOW_UNSAFE_BUFFER_USAGE_END
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