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/*
* Copyright (C) 2024 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
* (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 "APISerializedScriptValue.h"
#include <JavaScriptCore/JSRemoteInspector.h>
#include <JavaScriptCore/JSRetainPtr.h>
#include <wtf/CanMakeWeakPtr.h>
#include <wtf/NeverDestroyed.h>
#include <wtf/RunLoop.h>
#include <wtf/RuntimeApplicationChecks.h>
namespace API {
static constexpr auto SharedJSContextWKMaxIdleTime = 10_s;
class SharedJSContextWK : public CanMakeWeakPtr<SharedJSContextWK> {
public:
static SharedJSContextWK& singleton()
{
static MainRunLoopNeverDestroyed<SharedJSContextWK> sharedContext;
return sharedContext.get();
}
// Do nothing since this is a singleton.
void ref() const { }
void deref() const { }
JSRetainPtr<JSGlobalContextRef> ensureContext()
{
m_lastUseTime = MonotonicTime::now();
if (!m_context) {
bool inspectionPreviouslyFollowedInternalPolicies = JSRemoteInspectorGetInspectionFollowsInternalPolicies();
JSRemoteInspectorSetInspectionFollowsInternalPolicies(false);
// FIXME: rdar://100738357 Remote Web Inspector: Remove use of JSRemoteInspectorGetInspectionEnabledByDefault
// and JSRemoteInspectorSetInspectionEnabledByDefault once the default state is always false.
ALLOW_DEPRECATED_DECLARATIONS_BEGIN
bool previous = JSRemoteInspectorGetInspectionEnabledByDefault();
JSRemoteInspectorSetInspectionEnabledByDefault(false);
m_context = adopt(JSGlobalContextCreate(nullptr));
JSRemoteInspectorSetInspectionEnabledByDefault(previous);
ALLOW_DEPRECATED_DECLARATIONS_END
JSRemoteInspectorSetInspectionFollowsInternalPolicies(inspectionPreviouslyFollowedInternalPolicies);
m_timer.startOneShot(SharedJSContextWKMaxIdleTime);
}
return m_context;
}
void releaseContextIfNecessary()
{
auto idleTime = MonotonicTime::now() - m_lastUseTime;
if (idleTime < SharedJSContextWKMaxIdleTime) {
// We lazily restart the timer if needed every 10 seconds instead of doing so every time ensureContext()
// is called, for performance reasons.
m_timer.startOneShot(SharedJSContextWKMaxIdleTime - idleTime);
return;
}
m_context.clear();
}
private:
friend class NeverDestroyed<SharedJSContextWK, MainRunLoopAccessTraits>;
SharedJSContextWK()
: m_timer(RunLoop::mainSingleton(), "SharedJSContextWK::Timer"_s, this, &SharedJSContextWK::releaseContextIfNecessary)
{
}
JSRetainPtr<JSGlobalContextRef> m_context;
RunLoop::Timer m_timer;
MonotonicTime m_lastUseTime;
};
JSRetainPtr<JSGlobalContextRef> SerializedScriptValue::deserializationContext()
{
return SharedJSContextWK::singleton().ensureContext();
}
} // API
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