X-Git-Url: https://git.saurik.com/apple/javascriptcore.git/blobdiff_plain/a253471d7f8e4d91bf6ebabab00155c3b387d3d0..93a3786624b2768d89bfa27e46598dc64e2fb70a:/runtime/GCActivityCallbackCF.cpp diff --git a/runtime/GCActivityCallbackCF.cpp b/runtime/GCActivityCallbackCF.cpp deleted file mode 100644 index cbd5b79..0000000 --- a/runtime/GCActivityCallbackCF.cpp +++ /dev/null @@ -1,183 +0,0 @@ -/* - * Copyright (C) 2010 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. - * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of - * its contributors may be used to endorse or promote products derived - * from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY APPLE 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 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 "GCActivityCallback.h" - -#include "APIShims.h" -#include "Heap.h" -#include "JSGlobalData.h" -#include "JSLock.h" -#include "JSObject.h" -#include "ScopeChain.h" -#include -#include - -#if !USE(CF) -#error "This file should only be used on CF platforms." -#endif - -namespace JSC { - -bool GCActivityCallback::s_shouldCreateGCTimer = true; - -struct DefaultGCActivityCallbackPlatformData { - static void timerDidFire(CFRunLoopTimerRef, void *info); - - RetainPtr timer; - RetainPtr runLoop; - CFRunLoopTimerContext context; - double delay; - DefaultGCActivityCallback* thisObject; - JSGlobalData* globalData; - Mutex shutdownMutex; -}; - -const double gcTimeSlicePerMB = 0.01; // Percentage of CPU time we will spend to reclaim 1 MB -const double maxGCTimeSlice = 0.05; // The maximum amount of CPU time we want to use for opportunistic timer-triggered collections. -const double timerSlop = 2.0; // Fudge factor to avoid performance cost of resetting timer. -const double pagingTimeOut = 0.1; // Time in seconds to allow opportunistic timer to iterate over all blocks to see if the Heap is paged out. -const CFTimeInterval decade = 60 * 60 * 24 * 365 * 10; -const CFTimeInterval hour = 60 * 60; - -void DefaultGCActivityCallbackPlatformData::timerDidFire(CFRunLoopTimerRef, void *info) -{ - DefaultGCActivityCallbackPlatformData* d = static_cast(info); - d->shutdownMutex.lock(); - if (!d->globalData) { - d->shutdownMutex.unlock(); - delete d->thisObject; - return; - } - { - // We don't ref here to prevent us from resurrecting the ref count of a "dead" JSGlobalData. - APIEntryShim shim(d->globalData, APIEntryShimWithoutLock::DontRefGlobalData); - - Heap* heap = &d->globalData->heap; - heap->collectAllGarbage(); - } - d->shutdownMutex.unlock(); -} - -DefaultGCActivityCallback::DefaultGCActivityCallback(Heap* heap) -{ - commonConstructor(heap, CFRunLoopGetCurrent()); -} - -DefaultGCActivityCallback::DefaultGCActivityCallback(Heap* heap, CFRunLoopRef runLoop) -{ - commonConstructor(heap, runLoop); -} - -DefaultGCActivityCallback::~DefaultGCActivityCallback() -{ - CFRunLoopRemoveTimer(d->runLoop.get(), d->timer.get(), kCFRunLoopCommonModes); - CFRunLoopTimerInvalidate(d->timer.get()); -} - -void DefaultGCActivityCallback::commonConstructor(Heap* heap, CFRunLoopRef runLoop) -{ - d = adoptPtr(new DefaultGCActivityCallbackPlatformData); - - memset(&d->context, 0, sizeof(CFRunLoopTimerContext)); - d->context.info = d.get(); - d->thisObject = this; - d->globalData = heap->globalData(); - d->runLoop = runLoop; - d->timer.adoptCF(CFRunLoopTimerCreate(0, decade, decade, 0, 0, DefaultGCActivityCallbackPlatformData::timerDidFire, &d->context)); - d->delay = decade; - CFRunLoopAddTimer(d->runLoop.get(), d->timer.get(), kCFRunLoopCommonModes); -} - -void DefaultGCActivityCallback::invalidate() -{ - d->globalData = 0; - // We set the next fire date in the distant past to cause the timer to immediately fire so that - // the timer on the remote thread realizes that the VM is shutting down. - CFRunLoopTimerSetNextFireDate(d->timer.get(), CFAbsoluteTimeGetCurrent() - decade); -} - -void DefaultGCActivityCallback::didStartVMShutdown() -{ - if (CFRunLoopGetCurrent() == d->runLoop.get()) { - invalidate(); - delete this; - return; - } - ASSERT(!d->globalData->apiLock().currentThreadIsHoldingLock()); - MutexLocker locker(d->shutdownMutex); - invalidate(); -} - -static void scheduleTimer(DefaultGCActivityCallbackPlatformData* d, double newDelay) -{ - if (newDelay * timerSlop > d->delay) - return; - double delta = d->delay - newDelay; - d->delay = newDelay; - CFRunLoopTimerSetNextFireDate(d->timer.get(), CFRunLoopTimerGetNextFireDate(d->timer.get()) - delta); -} - -static void cancelTimer(DefaultGCActivityCallbackPlatformData* d) -{ - d->delay = decade; - CFRunLoopTimerSetNextFireDate(d->timer.get(), CFAbsoluteTimeGetCurrent() + decade); -} - -void DefaultGCActivityCallback::didAllocate(size_t bytes) -{ - // The first byte allocated in an allocation cycle will report 0 bytes to didAllocate. - // We pretend it's one byte so that we don't ignore this allocation entirely. - if (!bytes) - bytes = 1; - Heap* heap = &static_cast(d->context.info)->globalData->heap; - double gcTimeSlice = std::min((static_cast(bytes) / MB) * gcTimeSlicePerMB, maxGCTimeSlice); - double newDelay = heap->lastGCLength() / gcTimeSlice; - scheduleTimer(d.get(), newDelay); -} - -void DefaultGCActivityCallback::willCollect() -{ - cancelTimer(d.get()); -} - -void DefaultGCActivityCallback::synchronize() -{ - if (CFRunLoopGetCurrent() == d->runLoop.get()) - return; - CFRunLoopRemoveTimer(d->runLoop.get(), d->timer.get(), kCFRunLoopCommonModes); - d->runLoop = CFRunLoopGetCurrent(); - CFRunLoopAddTimer(d->runLoop.get(), d->timer.get(), kCFRunLoopCommonModes); -} - -void DefaultGCActivityCallback::cancel() -{ - cancelTimer(d.get()); -} - -}