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/*
* Copyright (C) 2019 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.
*/
#pragma once
#include "EnhancedSecurity.h"
#include "WebProcessProxy.h"
#include <WebCore/Site.h>
#include <pal/SessionID.h>
#include <wtf/AbstractRefCountedAndCanMakeWeakPtr.h>
#include <wtf/CheckedRef.h>
#include <wtf/HashMap.h>
#include <wtf/RefCountedAndCanMakeWeakPtr.h>
#include <wtf/RunLoop.h>
#include <wtf/TZoneMalloc.h>
#include <wtf/text/WTFString.h>
namespace WebKit {
class ProcessThrottlerActivity;
class WebProcessPool;
class WebsiteDataStore;
class WebProcessCache final : public AbstractRefCountedAndCanMakeWeakPtr<WebProcessCache> {
WTF_MAKE_TZONE_ALLOCATED(WebProcessCache);
public:
explicit WebProcessCache(WebProcessPool&);
bool addProcessIfPossible(Ref<WebProcessProxy>&&);
RefPtr<WebProcessProxy> takeProcess(const WebCore::Site&, WebsiteDataStore&, WebProcessProxy::LockdownMode, EnhancedSecurity, const API::PageConfiguration&);
RefPtr<WebProcessProxy> takeSharedProcess(const WebCore::Site& mainFrameSite, WebsiteDataStore&, WebProcessProxy::LockdownMode, EnhancedSecurity, const API::PageConfiguration&);
void updateCapacity(WebProcessPool&);
unsigned capacity() const { return m_capacity; }
unsigned size() const { return m_processesPerSite.size() + m_sharedProcessesPerSite.size(); }
void clear();
void setApplicationIsActive(bool);
void clearAllProcessesForSession(PAL::SessionID);
enum class ShouldShutDownProcess : bool { No, Yes };
void removeProcess(WebProcessProxy&, ShouldShutDownProcess);
static void setCachedProcessSuspensionDelayForTesting(Seconds);
void setCachedProcessLifetimeForTesting(Seconds);
void ref() const final;
void deref() const final;
private:
static Seconds cachedProcessLifetime;
static Seconds clearingDelayAfterApplicationResignsActive;
static int capacityOverride;
class CachedProcess : public RefCountedAndCanMakeWeakPtr<CachedProcess> {
WTF_MAKE_TZONE_ALLOCATED(CachedProcess);
public:
static Ref<CachedProcess> create(Ref<WebProcessProxy>&&, Seconds);
~CachedProcess();
Ref<WebProcessProxy> takeProcess();
WebProcessProxy& process() { ASSERT(m_process); return *m_process; }
RefPtr<WebProcessProxy> protectedProcess() const { return m_process; }
void startSuspensionTimer();
#if PLATFORM(COCOA) || PLATFORM(GTK) || PLATFORM(WPE)
bool isSuspended() const { return !m_suspensionTimer.isActive(); }
#endif
private:
explicit CachedProcess(Ref<WebProcessProxy>&&, Seconds);
void evictionTimerFired();
#if PLATFORM(COCOA) || PLATFORM(GTK) || PLATFORM(WPE)
void suspensionTimerFired();
#endif
RefPtr<WebProcessProxy> m_process;
RunLoop::Timer m_evictionTimer;
#if PLATFORM(COCOA) || PLATFORM(GTK) || PLATFORM(WPE)
RunLoop::Timer m_suspensionTimer;
RefPtr<ProcessThrottlerActivity> m_backgroundActivity;
#endif
};
bool canCacheProcess(WebProcessProxy&) const;
void platformInitialize();
bool addProcess(Ref<CachedProcess>&&);
void evictAtRandomIfNeeded();
unsigned m_capacity { 0 };
WeakRef<WebProcessPool> m_processPool;
HashMap<uint64_t, Ref<CachedProcess>> m_pendingAddRequests;
HashMap<WebCore::Site, Ref<CachedProcess>> m_processesPerSite;
HashMap<WebCore::Site, Ref<CachedProcess>> m_sharedProcessesPerSite;
RunLoop::Timer m_evictionTimer;
Seconds m_cachedProcessLifetime;
};
} // namespace WebKit
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