Changeset 94814 in webkit for trunk/Source/JavaScriptCore/heap/NewSpace.cpp

Timestamp:

Sep 8, 2011, 3:52:04 PM (14 years ago)

Author:

[email protected]

Message:

Use bump allocator for initial property storage
​https://bugs.webkit.org/show_bug.cgi?id=67494

Reviewed by Geoffrey Garen.

../../../../Volumes/Data/git/WebKit/OpenSource/Source/JavaScriptCore:

Use a bump allocator for initial allocation of property storage,
and promote to fastMalloc memory only if it survives a GC pass.

Comes out as a 1% win on v8, and is a useful step on the way to
GC allocation of all property storage.

• JavaScriptCore.exp:
• JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.def:
• JavaScriptCore.xcodeproj/project.pbxproj:
• heap/Heap.cpp:

(JSC::Heap::collect):

• heap/Heap.h:

(JSC::Heap::allocatePropertyStorage):
(JSC::Heap::inPropertyStorageNursery):

• heap/MarkedBlock.h:
• heap/NewSpace.cpp:

(JSC::NewSpace::NewSpace):

• heap/NewSpace.h:

(JSC::NewSpace::resetPropertyStorageNursery):
(JSC::NewSpace::allocatePropertyStorage):
(JSC::NewSpace::inPropertyStorageNursery):

• jit/JITStubs.cpp:

(JSC::DEFINE_STUB_FUNCTION):

• runtime/JSObject.cpp:

(JSC::JSObject::allocatePropertyStorage):

• runtime/JSObject.h:

(JSC::JSObject::isUsingInlineStorage):
(JSC::JSObject::JSObject):
(JSC::JSObject::propertyStorage):
(JSC::JSObject::~JSObject):
(JSC::JSObject::putDirectInternal):
(JSC::JSObject::putDirectWithoutTransition):
(JSC::JSObject::putDirectFunctionWithoutTransition):
(JSC::JSObject::transitionTo):
(JSC::JSObject::visitChildrenDirect):

• runtime/StorageBarrier.h: Added.

(JSC::StorageBarrier::StorageBarrier):
(JSC::StorageBarrier::set):
(JSC::StorageBarrier::operator->):
(JSC::StorageBarrier::operator*):
(JSC::StorageBarrier::operator[]):
(JSC::StorageBarrier::get):

../../../../Volumes/Data/git/WebKit/OpenSource/Source/WebCore:

Add a forwarding header.

• ForwardingHeaders/runtime/StorageBarrier.h: Added.

File:

• trunk/Source/JavaScriptCore/heap/NewSpace.cpp (modified) (1 diff)

trunk/Source/JavaScriptCore/heap/NewSpace.cpp

@@ -33 +33 @@
 
 NewSpace::NewSpace(Heap* heap)
-    : m_waterMark(0)
+    : m_propertyStorageNursery(static_cast<char*>(fastMalloc(PropertyStorageNurserySize)))
+    , m_propertyStorageAllocationPoint(m_propertyStorageNursery)
+    , m_waterMark(0)
     , m_highWaterMark(0)
     , m_heap(heap)