Diff
Modified: trunk/Source/WebCore/ChangeLog (87227 => 87228)
--- trunk/Source/WebCore/ChangeLog 2011-05-24 23:19:55 UTC (rev 87227)
+++ trunk/Source/WebCore/ChangeLog 2011-05-24 23:43:15 UTC (rev 87228)
@@ -1,3 +1,45 @@
+2011-05-24 Michael Saboff <[email protected]>
+
+ Reviewed by Geoffrey Garen.
+
+ Improve handling in WebCore of low memory situations
+ https://bugs.webkit.org/show_bug.cgi?id=61222
+
+ Added new class, MemoryPressureHandler, to platform to respond to low
+ system memory events. Added Mac specific implementation that reduces the
+ page cache, NSURL cache, WebCore cache by half their current usage
+ and then garbage collects. This can allow Safari to continue operating
+ in a low memory situation with minimal paging.
+ Split up prune operations in MemoryCache to allow for pruning to a
+ specific actual size to support this change.
+
+ No tests added as the functionality of WebKit wasn't changed.
+
+ * GNUmakefile.list.am:
+ * WebCore.exp.in:
+ * WebCore.gypi:
+ * WebCore.pro:
+ * WebCore.vcproj/WebCore.vcproj:
+ * WebCore.xcodeproj/project.pbxproj:
+ * loader/cache/MemoryCache.cpp:
+ (WebCore::MemoryCache::pruneLiveResources):
+ (WebCore::MemoryCache::forcePruneLiveResources):
+ (WebCore::MemoryCache::pruneLiveResourcesToTarget):
+ (WebCore::MemoryCache::pruneDeadResources):
+ (WebCore::MemoryCache::forcePruneDeadResources):
+ (WebCore::MemoryCache::pruneDeadResourcesToTarget):
+ * loader/cache/MemoryCache.h:
+ (WebCore::MemoryCache::forcePrune):
+ * platform/MemoryPressureHandler.cpp: Added.
+ (WebCore::memoryPressureHandler):
+ (WebCore::MemoryPressureHandler::MemoryPressureHandler):
+ (WebCore::MemoryPressureHandler::install):
+ (WebCore::MemoryPressureHandler::respondToMemoryPressure):
+ * platform/MemoryPressureHandler.h: Added.
+ * platform/mac/MemoryPressureHandler.mm: Added.
+ (WebCore::MemoryPressureHandler::install):
+ (WebCore::MemoryPressureHandler::respondToMemoryPressure):
+
2011-05-24 Kent Tamura <[email protected]>
Reviewed by Dimitri Glazkov.
Modified: trunk/Source/WebCore/GNUmakefile.list.am (87227 => 87228)
--- trunk/Source/WebCore/GNUmakefile.list.am 2011-05-24 23:19:55 UTC (rev 87227)
+++ trunk/Source/WebCore/GNUmakefile.list.am 2011-05-24 23:43:15 UTC (rev 87228)
@@ -2539,6 +2539,8 @@
Source/WebCore/platform/Logging.h \
Source/WebCore/platform/MIMETypeRegistry.cpp \
Source/WebCore/platform/MIMETypeRegistry.h \
+ Source/WebCore/platform/MemoryPressureHandler.cpp \
+ Source/WebCore/platform/MemoryPressureHandler.h \
Source/WebCore/platform/mock/DeviceOrientationClientMock.cpp \
Source/WebCore/platform/mock/DeviceOrientationClientMock.h \
Source/WebCore/platform/mock/GeolocationClientMock.cpp \
Modified: trunk/Source/WebCore/WebCore.exp.in (87227 => 87228)
--- trunk/Source/WebCore/WebCore.exp.in 2011-05-24 23:19:55 UTC (rev 87227)
+++ trunk/Source/WebCore/WebCore.exp.in 2011-05-24 23:43:15 UTC (rev 87228)
@@ -545,6 +545,8 @@
__ZN7WebCore20makeRGBA32FromFloatsEffff
__ZN7WebCore20protocolIsJavaScriptERKN3WTF6StringE
__ZN7WebCore21BackForwardController11itemAtIndexEi
+__ZN7WebCore21memoryPressureHandlerEv
+__ZN7WebCore21MemoryPressureHandler7installEv
__ZN7WebCore21PlatformKeyboardEvent24disambiguateKeyDownEventENS0_4TypeEb
__ZN7WebCore21PlatformKeyboardEventC1EP7NSEvent
__ZN7WebCore21ResourceLoadScheduler20servePendingRequestsENS_20ResourceLoadPriorityE
Modified: trunk/Source/WebCore/WebCore.gypi (87227 => 87228)
--- trunk/Source/WebCore/WebCore.gypi 2011-05-24 23:19:55 UTC (rev 87227)
+++ trunk/Source/WebCore/WebCore.gypi 2011-05-24 23:43:15 UTC (rev 87228)
@@ -763,6 +763,7 @@
'platform/LocalizationStrategy.h',
'platform/LocalizedStrings.h',
'platform/Logging.h',
+ 'platform/MemoryPressureHandler.h',
'platform/MIMETypeRegistry.h',
'platform/NotImplemented.h',
'platform/PlatformGestureEvent.h',
@@ -3583,6 +3584,7 @@
'platform/LinkHash.cpp',
'platform/LocalizedStrings.cpp',
'platform/Logging.cpp',
+ 'platform/MemoryPressureHandler.cpp',
'platform/MIMETypeRegistry.cpp',
'platform/Pasteboard.h',
'platform/PlatformStrategies.cpp',
Modified: trunk/Source/WebCore/WebCore.pro (87227 => 87228)
--- trunk/Source/WebCore/WebCore.pro 2011-05-24 23:19:55 UTC (rev 87227)
+++ trunk/Source/WebCore/WebCore.pro 2011-05-24 23:43:15 UTC (rev 87228)
@@ -1021,6 +1021,7 @@
platform/leveldb/LevelDBSlice.h \
platform/LinkHash.cpp \
platform/Logging.cpp \
+ platform/MemoryPressureHandler.cpp \
platform/MIMETypeRegistry.cpp \
platform/mock/DeviceOrientationClientMock.cpp \
platform/mock/GeolocationClientMock.cpp \
@@ -1997,6 +1998,7 @@
platform/LinkHash.h \
platform/Logging.h \
platform/Language.h \
+ platfory/MemoryPressureHandler.h \
platform/MIMETypeRegistry.h \
platform/network/AuthenticationChallengeBase.h \
platform/network/AuthenticationClient.h \
Modified: trunk/Source/WebCore/WebCore.vcproj/WebCore.vcproj (87227 => 87228)
--- trunk/Source/WebCore/WebCore.vcproj/WebCore.vcproj 2011-05-24 23:19:55 UTC (rev 87227)
+++ trunk/Source/WebCore/WebCore.vcproj/WebCore.vcproj 2011-05-24 23:43:15 UTC (rev 87228)
@@ -26094,6 +26094,14 @@
>
</File>
<File
+ RelativePath="..\platform\MemoryPressureHandler.cpp"
+ >
+ </File>
+ <File
+ RelativePath="..\platform\MemoryPressureHandler.h"
+ >
+ </File>
+ <File
RelativePath="..\platform\NotImplemented.h"
>
</File>
Modified: trunk/Source/WebCore/WebCore.xcodeproj/project.pbxproj (87227 => 87228)
--- trunk/Source/WebCore/WebCore.xcodeproj/project.pbxproj 2011-05-24 23:19:55 UTC (rev 87227)
+++ trunk/Source/WebCore/WebCore.xcodeproj/project.pbxproj 2011-05-24 23:43:15 UTC (rev 87228)
@@ -1490,6 +1490,9 @@
656D37410ADBA5DE00A4554D /* MainResourceLoader.h in Headers */ = {isa = PBXBuildFile; fileRef = 656D37290ADBA5DE00A4554D /* MainResourceLoader.h */; };
656D37430ADBA5DE00A4554D /* NetscapePlugInStreamLoader.h in Headers */ = {isa = PBXBuildFile; fileRef = 656D372B0ADBA5DE00A4554D /* NetscapePlugInStreamLoader.h */; settings = {ATTRIBUTES = (Private, ); }; };
656D37480ADBA5DE00A4554D /* SubresourceLoader.h in Headers */ = {isa = PBXBuildFile; fileRef = 656D37300ADBA5DE00A4554D /* SubresourceLoader.h */; settings = {ATTRIBUTES = (Private, ); }; };
+ 6571DCC81385E6A400702DD0 /* MemoryPressureHandler.h in Headers */ = {isa = PBXBuildFile; fileRef = 657EDA071385CB97004E0645 /* MemoryPressureHandler.h */; settings = {ATTRIBUTES = (Private, ); }; };
+ 657EDA081385CB97004E0645 /* MemoryPressureHandler.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 657EDA061385CB97004E0645 /* MemoryPressureHandler.cpp */; };
+ 657EDA0B1385CBD8004E0645 /* MemoryPressureHandlerMac.mm in Sources */ = {isa = PBXBuildFile; fileRef = 657EDA0A1385CBD8004E0645 /* MemoryPressureHandlerMac.mm */; };
6582A16309999D6D00BEEB6D /* SystemTimeMac.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 6582A15509999D6D00BEEB6D /* SystemTimeMac.cpp */; };
658436860AE01B7400E53753 /* FrameLoadRequest.h in Headers */ = {isa = PBXBuildFile; fileRef = 658436850AE01B7400E53753 /* FrameLoadRequest.h */; settings = {ATTRIBUTES = (Private, ); }; };
6593923709AE4346002C531F /* KURL.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 6593923509AE4346002C531F /* KURL.cpp */; };
@@ -8068,6 +8071,9 @@
656D37290ADBA5DE00A4554D /* MainResourceLoader.h */ = {isa = PBXFileReference; fileEncoding = 30; lastKnownFileType = sourcecode.c.h; path = MainResourceLoader.h; sourceTree = "<group>"; };
656D372B0ADBA5DE00A4554D /* NetscapePlugInStreamLoader.h */ = {isa = PBXFileReference; fileEncoding = 30; lastKnownFileType = sourcecode.c.h; path = NetscapePlugInStreamLoader.h; sourceTree = "<group>"; };
656D37300ADBA5DE00A4554D /* SubresourceLoader.h */ = {isa = PBXFileReference; fileEncoding = 30; lastKnownFileType = sourcecode.c.h; path = SubresourceLoader.h; sourceTree = "<group>"; };
+ 657EDA061385CB97004E0645 /* MemoryPressureHandler.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = MemoryPressureHandler.cpp; sourceTree = "<group>"; };
+ 657EDA071385CB97004E0645 /* MemoryPressureHandler.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = MemoryPressureHandler.h; sourceTree = "<group>"; };
+ 657EDA0A1385CBD8004E0645 /* MemoryPressureHandlerMac.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = MemoryPressureHandlerMac.mm; sourceTree = "<group>"; };
6582A15509999D6D00BEEB6D /* SystemTimeMac.cpp */ = {isa = PBXFileReference; fileEncoding = 30; lastKnownFileType = sourcecode.cpp.cpp; path = SystemTimeMac.cpp; sourceTree = "<group>"; };
658436850AE01B7400E53753 /* FrameLoadRequest.h */ = {isa = PBXFileReference; fileEncoding = 30; lastKnownFileType = sourcecode.c.h; path = FrameLoadRequest.h; sourceTree = "<group>"; };
6593923509AE4346002C531F /* KURL.cpp */ = {isa = PBXFileReference; fileEncoding = 30; lastKnownFileType = sourcecode.cpp.cpp; path = KURL.cpp; sourceTree = "<group>"; };
@@ -14149,6 +14155,7 @@
06E81EEB0AB5DA9700C87837 /* LocalCurrentGraphicsContext.mm */,
BC25B528131C6D3900180E10 /* LocalizedStringsMac.mm */,
1402645D0AFDC19B005919E2 /* LoggingMac.mm */,
+ 657EDA0A1385CBD8004E0645 /* MemoryPressureHandlerMac.mm */,
BC772C5D0C4EB3440083285F /* MIMETypeRegistryMac.mm */,
A7D3C5230B576B4B002CA450 /* PasteboardHelper.h */,
4B2709810AF2E5E00065127F /* PasteboardMac.mm */,
@@ -18633,6 +18640,8 @@
935207BD09BD410A00F2038D /* LocalizedStrings.h */,
A8239DFE09B3CF8A00B60641 /* Logging.cpp */,
A8239DFF09B3CF8A00B60641 /* Logging.h */,
+ 657EDA061385CB97004E0645 /* MemoryPressureHandler.cpp */,
+ 657EDA071385CB97004E0645 /* MemoryPressureHandler.h */,
BC772C4C0C4EB3040083285F /* MIMETypeRegistry.cpp */,
BC772C4D0C4EB3040083285F /* MIMETypeRegistry.h */,
98EB1F941313FE0500D0E1EA /* NotImplemented.h */,
@@ -22920,6 +22929,7 @@
E1BE512E0CF6C512002EA959 /* XSLTUnicodeSort.h in Headers */,
977E2E0F12F0FC9C00C13379 /* XSSFilter.h in Headers */,
FD537353137B651800008DCE /* ZeroPole.h in Headers */,
+ 6571DCC81385E6A400702DD0 /* MemoryPressureHandler.h in Headers */,
598365DD1355F557001B185D /* JSPositionCallback.h in Headers */,
598365DF1355F562001B185D /* JSPositionErrorCallback.h in Headers */,
B1E5457B1346291F0092A545 /* GeneratedStream.h in Headers */,
@@ -25604,6 +25614,8 @@
E1BE512D0CF6C512002EA959 /* XSLTUnicodeSort.cpp in Sources */,
977E2E0E12F0FC9C00C13379 /* XSSFilter.cpp in Sources */,
FD537352137B651800008DCE /* ZeroPole.cpp in Sources */,
+ 657EDA081385CB97004E0645 /* MemoryPressureHandler.cpp in Sources */,
+ 657EDA0B1385CBD8004E0645 /* MemoryPressureHandlerMac.mm in Sources */,
598365E41355F604001B185D /* JSPositionCallback.cpp in Sources */,
598365E61355F60D001B185D /* JSPositionErrorCallback.cpp in Sources */,
B1E5457A1346291F0092A545 /* GeneratedStream.cpp in Sources */,
Modified: trunk/Source/WebCore/loader/cache/MemoryCache.cpp (87227 => 87228)
--- trunk/Source/WebCore/loader/cache/MemoryCache.cpp 2011-05-24 23:19:55 UTC (rev 87227)
+++ trunk/Source/WebCore/loader/cache/MemoryCache.cpp 2011-05-24 23:43:15 UTC (rev 87228)
@@ -172,6 +172,26 @@
return;
unsigned targetSize = static_cast<unsigned>(capacity * cTargetPrunePercentage); // Cut by a percentage to avoid immediately pruning again.
+
+ pruneLiveResourcesToSize(targetSize);
+}
+
+void MemoryCache::PruneLiveResourcesToPercentage(float prunePercentage)
+{
+ if (!m_pruneEnabled)
+ return;
+
+ if (prunePercentage < 0.0f || prunePercentage > 0.95f)
+ return;
+
+ unsigned currentSize = m_liveSize + m_deadSize;
+ unsigned targetSize = static_cast<unsigned>(currentSize * prunePercentage);
+
+ pruneLiveResourcesToSize(targetSize);
+}
+
+void MemoryCache::pruneLiveResourcesToSize(unsigned targetSize)
+{
double currentTime = FrameView::currentPaintTimeStamp();
if (!currentTime) // In case prune is called directly, outside of a Frame paint.
currentTime = WTF::currentTime();
@@ -216,8 +236,27 @@
return;
unsigned targetSize = static_cast<unsigned>(capacity * cTargetPrunePercentage); // Cut by a percentage to avoid immediately pruning again.
+ pruneDeadResourcesToSize(targetSize);
+}
+
+void MemoryCache::PruneDeadResourcesToPercentage(float prunePercentage)
+{
+ if (!m_pruneEnabled)
+ return;
+
+ if (prunePercentage < 0.0f || prunePercentage > 0.95f)
+ return;
+
+ unsigned currentSize = m_liveSize + m_deadSize;
+ unsigned targetSize = static_cast<unsigned>(currentSize * prunePercentage);
+
+ pruneDeadResourcesToSize(targetSize);
+}
+
+void MemoryCache::pruneDeadResourcesToSize(unsigned targetSize)
+{
int size = m_allResources.size();
-
+
if (!m_inPruneDeadResources) {
// See if we have any purged resources we can evict.
for (int i = 0; i < size; i++) {
Modified: trunk/Source/WebCore/loader/cache/MemoryCache.h (87227 => 87228)
--- trunk/Source/WebCore/loader/cache/MemoryCache.h 2011-05-24 23:19:55 UTC (rev 87227)
+++ trunk/Source/WebCore/loader/cache/MemoryCache.h 2011-05-24 23:43:15 UTC (rev 87228)
@@ -139,6 +139,12 @@
pruneLiveResources();
}
+ void pruneToPercentage(float targetPercentLive)
+ {
+ PruneDeadResourcesToPercentage(targetPercentLive); // Prune dead first, in case it was "borrowing" capacity from live.
+ PruneLiveResourcesToPercentage(targetPercentLive);
+ }
+
void setDeadDecodedDataDeletionInterval(double interval) { m_deadDecodedDataDeletionInterval = interval; }
double deadDecodedDataDeletionInterval() const { return m_deadDecodedDataDeletionInterval; }
@@ -182,10 +188,16 @@
unsigned liveCapacity() const;
unsigned deadCapacity() const;
-
- void pruneDeadResources(); // Flush decoded and encoded data from resources not referenced by Web pages.
- void pruneLiveResources(); // Flush decoded data from resources still referenced by Web pages.
+ // pruneDead*() - Flush decoded and encoded data from resources not referenced by Web pages.
+ // pruneLive*() - Flush decoded data from resources still referenced by Web pages.
+ void pruneDeadResources(); // Automatically decide how much to prune.
+ void pruneLiveResources();
+ void PruneDeadResourcesToPercentage(float prunePercentage);
+ void PruneLiveResourcesToPercentage(float prunePercentage);
+ void pruneDeadResourcesToSize(unsigned targetSize);
+ void pruneLiveResourcesToSize(unsigned targetSize);
+
bool makeResourcePurgeable(CachedResource*);
void evict(CachedResource*);
Added: trunk/Source/WebCore/platform/MemoryPressureHandler.cpp (0 => 87228)
--- trunk/Source/WebCore/platform/MemoryPressureHandler.cpp (rev 0)
+++ trunk/Source/WebCore/platform/MemoryPressureHandler.cpp 2011-05-24 23:43:15 UTC (rev 87228)
@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2011 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 "MemoryPressureHandler.h"
+
+#include <wtf/StdLibExtras.h>
+
+namespace WebCore {
+
+MemoryPressureHandler& memoryPressureHandler()
+{
+ DEFINE_STATIC_LOCAL(MemoryPressureHandler, staticMemoryPressureHandler, ());
+ return staticMemoryPressureHandler;
+}
+
+MemoryPressureHandler::MemoryPressureHandler() { }
+
+#if !PLATFORM(MAC) || defined(BUILDING_ON_LEOPARD) || defined(BUILDING_ON_SNOW_LEOPARD)
+void MemoryPressureHandler::install() { }
+
+void MemoryPressureHandler::respondToMemoryPressure() { }
+#endif
+
+} // namespace WebCore
Added: trunk/Source/WebCore/platform/MemoryPressureHandler.h (0 => 87228)
--- trunk/Source/WebCore/platform/MemoryPressureHandler.h (rev 0)
+++ trunk/Source/WebCore/platform/MemoryPressureHandler.h 2011-05-24 23:43:15 UTC (rev 87228)
@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2011 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.
+ */
+
+#ifndef MemoryPressureHandler_h
+#define MemoryPressureHandler_h
+
+#include <wtf/Platform.h>
+
+namespace WebCore {
+
+class MemoryPressureHandler {
+public:
+ friend MemoryPressureHandler& memoryPressureHandler();
+
+ void install();
+
+private:
+ MemoryPressureHandler();
+ ~MemoryPressureHandler();
+
+ void respondToMemoryPressure();
+};
+
+// Function to obtain the global memory pressure object.
+MemoryPressureHandler& memoryPressureHandler();
+
+} // namespace WebCore
+
+#endif // MemoryPressureHandler_h
Added: trunk/Source/WebCore/platform/mac/MemoryPressureHandlerMac.mm (0 => 87228)
--- trunk/Source/WebCore/platform/mac/MemoryPressureHandlerMac.mm (rev 0)
+++ trunk/Source/WebCore/platform/mac/MemoryPressureHandlerMac.mm 2011-05-24 23:43:15 UTC (rev 87228)
@@ -0,0 +1,106 @@
+/*
+ * Copyright (C) 2011 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.
+ */
+
+#import "config.h"
+#import "MemoryPressureHandler.h"
+#import <WebCore/GCController.h>
+#import <WebCore/MemoryCache.h>
+#import <WebCore/PageCache.h>
+#import <wtf/FastMalloc.h>
+
+#if !defined(BUILDING_ON_LEOPARD) && !defined(BUILDING_ON_SNOW_LEOPARD)
+#import <dispatch/dispatch.h>
+
+#ifndef DISPATCH_SOURCE_TYPE_VM
+#define DISPATCH_SOURCE_TYPE_VM (&_dispatch_source_type_vm)
+DISPATCH_EXPORT const struct dispatch_source_type_s _dispatch_source_type_vm;
+#endif
+
+#ifdef DISPATCH_VM_PRESSURE
+enum {
+ DISPATCH_VM_PRESSURE = 0x80000000,
+};
+#endif
+
+#endif
+
+namespace WebCore {
+
+#if !defined(BUILDING_ON_LEOPARD) && !defined(BUILDING_ON_SNOW_LEOPARD)
+
+static dispatch_source_t _cache_event_source = 0;
+#ifndef NDEBUG
+static dispatch_source_t _cache_event_source2 = 0;
+#endif
+
+void MemoryPressureHandler::install()
+{
+ if (!_cache_event_source) {
+ dispatch_async(dispatch_get_main_queue(), ^{
+ _cache_event_source = dispatch_source_create(DISPATCH_SOURCE_TYPE_VM, 0, DISPATCH_VM_PRESSURE, dispatch_get_main_queue());
+ if (_cache_event_source) {
+ dispatch_set_context(_cache_event_source, this);
+ dispatch_source_set_event_handler(_cache_event_source, ^{ memoryPressureHandler().respondToMemoryPressure();});
+ dispatch_resume(_cache_event_source);
+ }
+ });
+ }
+
+#ifndef NDEBUG
+ if (!_cache_event_source2) {
+ dispatch_async(dispatch_get_main_queue(), ^{
+ _cache_event_source2 = dispatch_source_create(DISPATCH_SOURCE_TYPE_SIGNAL, SIGUSR2, 0, dispatch_get_main_queue());
+ if (_cache_event_source2) {
+ dispatch_set_context(_cache_event_source2, this);
+ dispatch_source_set_event_handler(_cache_event_source2, ^{ memoryPressureHandler().respondToMemoryPressure();});
+ dispatch_resume(_cache_event_source2);
+ signal((int)SIGUSR2, SIG_IGN);
+ }
+ });
+ }
+#endif
+}
+
+void MemoryPressureHandler::respondToMemoryPressure()
+{
+ int savedPageCacheCapacity = pageCache()->capacity();
+ pageCache()->setCapacity(pageCache()->pageCount()>>1);
+ pageCache()->setCapacity(savedPageCacheCapacity);
+ pageCache()->releaseAutoreleasedPagesNow();
+
+ NSURLCache *nsurlCache = [NSURLCache sharedURLCache];
+ NSUInteger savedNsurlCacheMemoryCapacity = [nsurlCache memoryCapacity];
+ [nsurlCache setMemoryCapacity:[nsurlCache currentMemoryUsage]>>1];
+ [nsurlCache setMemoryCapacity:savedNsurlCacheMemoryCapacity];
+
+ memoryCache()->pruneToPercentage(0.5f);
+
+ gcController().garbageCollectNow();
+
+ WTF::releaseFastMallocFreeMemory();
+}
+#endif
+
+} // namespace WebCore
Modified: trunk/Source/WebKit/mac/ChangeLog (87227 => 87228)
--- trunk/Source/WebKit/mac/ChangeLog 2011-05-24 23:19:55 UTC (rev 87227)
+++ trunk/Source/WebKit/mac/ChangeLog 2011-05-24 23:43:15 UTC (rev 87228)
@@ -1,3 +1,16 @@
+2011-05-24 Michael Saboff <[email protected]>
+
+ Reviewed by Geoffrey Garen.
+
+ Improve handling in WebCore of low memory situations
+ https://bugs.webkit.org/show_bug.cgi?id=61222
+
+ Added call to enable memory pressure handling.
+
+ * WebView/WebView.mm:
+ (-[WebView _commonInitializationWithFrameName:groupName:usesDocumentViews:]):
+ * WebView/WebViewInternal.h:
+
2011-05-24 Jay Civelli <[email protected]>
Rubberstamped by David Kilzer.
Modified: trunk/Source/WebKit/mac/WebView/WebView.mm (87227 => 87228)
--- trunk/Source/WebKit/mac/WebView/WebView.mm 2011-05-24 23:19:55 UTC (rev 87227)
+++ trunk/Source/WebKit/mac/WebView/WebView.mm 2011-05-24 23:43:15 UTC (rev 87228)
@@ -138,6 +138,7 @@
#import <WebCore/JSElement.h>
#import <WebCore/JSNodeList.h>
#import <WebCore/Logging.h>
+#import <WebCore/MemoryPressureHandler.h>
#import <WebCore/MIMETypeRegistry.h>
#import <WebCore/NodeList.h>
#import <WebCore/Page.h>
@@ -798,6 +799,8 @@
[self _preferencesChanged:[self preferences]];
[[self preferences] _postPreferencesChangedAPINotification];
+ memoryPressureHandler().install();
+
if (!WebKitLinkedOnOrAfter(WEBKIT_FIRST_VERSION_WITH_LOCAL_RESOURCE_SECURITY_RESTRICTION)) {
// Originally, we allowed all local loads.
SecurityOrigin::setLocalLoadPolicy(SecurityOrigin::AllowLocalLoadsForAll);
Modified: trunk/Source/WebKit2/ChangeLog (87227 => 87228)
--- trunk/Source/WebKit2/ChangeLog 2011-05-24 23:19:55 UTC (rev 87227)
+++ trunk/Source/WebKit2/ChangeLog 2011-05-24 23:43:15 UTC (rev 87228)
@@ -1,3 +1,18 @@
+2011-05-24 Michael Saboff <[email protected]>
+
+ Reviewed by Geoffrey Garen.
+
+ Improve handling in WebCore of low memory situations
+ https://bugs.webkit.org/show_bug.cgi?id=61222
+
+ Added call to enable memory pressure handling for Mac case.
+
+ * WebProcess/WebProcess.cpp:
+ (WebKit::WebProcess::initializeWebProcess):
+ * WebProcess/WebProcess.h:
+ * WebProcess/mac/WebProcessMac.mm:
+ (WebKit::WebProcess::platformInitializeWebProcess):
+
2011-05-24 Brady Eidson <[email protected]>
Reviewed by Darin Adler.
Modified: trunk/Source/WebKit2/WebProcess/WebProcess.cpp (87227 => 87228)
--- trunk/Source/WebKit2/WebProcess/WebProcess.cpp 2011-05-24 23:19:55 UTC (rev 87227)
+++ trunk/Source/WebKit2/WebProcess/WebProcess.cpp 2011-05-24 23:43:15 UTC (rev 87228)
@@ -58,6 +58,7 @@
#include <WebCore/Language.h>
#include <WebCore/Logging.h>
#include <WebCore/MemoryCache.h>
+#include <WebCore/MemoryPressureHandler.h>
#include <WebCore/Page.h>
#include <WebCore/PageCache.h>
#include <WebCore/PageGroup.h>
@@ -164,6 +165,8 @@
platformInitializeWebProcess(parameters, arguments);
+ memoryPressureHandler().install();
+
RefPtr<APIObject> injectedBundleInitializationUserData;
InjectedBundleUserMessageDecoder messageDecoder(injectedBundleInitializationUserData);
if (!arguments->decode(messageDecoder))
