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<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/179348">179348</a></dd>
<dt>Author</dt> <dd>ggaren@apple.com</dd>
<dt>Date</dt> <dd>2015-01-29 11:20:06 -0800 (Thu, 29 Jan 2015)</dd>
</dl>
<h3>Log Message</h3>
<pre>Use FastMalloc (bmalloc) instead of BlockAllocator for GC pages
https://bugs.webkit.org/show_bug.cgi?id=140900
Reviewed by Mark Hahnenberg.
Re-landing just the GCArraySegment piece of this patch.
* heap/CodeBlockSet.cpp:
(JSC::CodeBlockSet::CodeBlockSet):
* heap/CodeBlockSet.h:
* heap/GCSegmentedArray.h:
(JSC::GCArraySegment::GCArraySegment):
* heap/GCSegmentedArrayInlines.h:
(JSC::GCSegmentedArray<T>::GCSegmentedArray):
(JSC::GCSegmentedArray<T>::~GCSegmentedArray):
(JSC::GCSegmentedArray<T>::clear):
(JSC::GCSegmentedArray<T>::expand):
(JSC::GCSegmentedArray<T>::refill):
(JSC::GCArraySegment<T>::create):
(JSC::GCArraySegment<T>::destroy):
* heap/GCThreadSharedData.cpp:
(JSC::GCThreadSharedData::GCThreadSharedData):
* heap/Heap.cpp:
(JSC::Heap::Heap):
* heap/MarkStack.cpp:
(JSC::MarkStackArray::MarkStackArray):
* heap/MarkStack.h:
* heap/SlotVisitor.cpp:
(JSC::SlotVisitor::SlotVisitor):</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkSourceJavaScriptCoreChangeLog">trunk/Source/JavaScriptCore/ChangeLog</a></li>
<li><a href="#trunkSourceJavaScriptCoreheapCodeBlockSetcpp">trunk/Source/JavaScriptCore/heap/CodeBlockSet.cpp</a></li>
<li><a href="#trunkSourceJavaScriptCoreheapCodeBlockSeth">trunk/Source/JavaScriptCore/heap/CodeBlockSet.h</a></li>
<li><a href="#trunkSourceJavaScriptCoreheapGCSegmentedArrayh">trunk/Source/JavaScriptCore/heap/GCSegmentedArray.h</a></li>
<li><a href="#trunkSourceJavaScriptCoreheapGCSegmentedArrayInlinesh">trunk/Source/JavaScriptCore/heap/GCSegmentedArrayInlines.h</a></li>
<li><a href="#trunkSourceJavaScriptCoreheapGCThreadSharedDatacpp">trunk/Source/JavaScriptCore/heap/GCThreadSharedData.cpp</a></li>
<li><a href="#trunkSourceJavaScriptCoreheapHeapcpp">trunk/Source/JavaScriptCore/heap/Heap.cpp</a></li>
<li><a href="#trunkSourceJavaScriptCoreheapMarkStackcpp">trunk/Source/JavaScriptCore/heap/MarkStack.cpp</a></li>
<li><a href="#trunkSourceJavaScriptCoreheapMarkStackh">trunk/Source/JavaScriptCore/heap/MarkStack.h</a></li>
<li><a href="#trunkSourceJavaScriptCoreheapSlotVisitorcpp">trunk/Source/JavaScriptCore/heap/SlotVisitor.cpp</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkSourceJavaScriptCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/ChangeLog (179347 => 179348)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/ChangeLog        2015-01-29 18:38:51 UTC (rev 179347)
+++ trunk/Source/JavaScriptCore/ChangeLog        2015-01-29 19:20:06 UTC (rev 179348)
</span><span class="lines">@@ -1,3 +1,35 @@
</span><ins>+2015-01-28 Geoffrey Garen <ggaren@apple.com>
+
+ Use FastMalloc (bmalloc) instead of BlockAllocator for GC pages
+ https://bugs.webkit.org/show_bug.cgi?id=140900
+
+ Reviewed by Mark Hahnenberg.
+
+ Re-landing just the GCArraySegment piece of this patch.
+
+ * heap/CodeBlockSet.cpp:
+ (JSC::CodeBlockSet::CodeBlockSet):
+ * heap/CodeBlockSet.h:
+ * heap/GCSegmentedArray.h:
+ (JSC::GCArraySegment::GCArraySegment):
+ * heap/GCSegmentedArrayInlines.h:
+ (JSC::GCSegmentedArray<T>::GCSegmentedArray):
+ (JSC::GCSegmentedArray<T>::~GCSegmentedArray):
+ (JSC::GCSegmentedArray<T>::clear):
+ (JSC::GCSegmentedArray<T>::expand):
+ (JSC::GCSegmentedArray<T>::refill):
+ (JSC::GCArraySegment<T>::create):
+ (JSC::GCArraySegment<T>::destroy):
+ * heap/GCThreadSharedData.cpp:
+ (JSC::GCThreadSharedData::GCThreadSharedData):
+ * heap/Heap.cpp:
+ (JSC::Heap::Heap):
+ * heap/MarkStack.cpp:
+ (JSC::MarkStackArray::MarkStackArray):
+ * heap/MarkStack.h:
+ * heap/SlotVisitor.cpp:
+ (JSC::SlotVisitor::SlotVisitor):
+
</ins><span class="cx"> 2015-01-29 Csaba Osztrogonác <ossy@webkit.org>
</span><span class="cx">
</span><span class="cx"> Move HAVE_DTRACE definition back to Platform.h
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoreheapCodeBlockSetcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/heap/CodeBlockSet.cpp (179347 => 179348)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/heap/CodeBlockSet.cpp        2015-01-29 18:38:51 UTC (rev 179347)
+++ trunk/Source/JavaScriptCore/heap/CodeBlockSet.cpp        2015-01-29 19:20:06 UTC (rev 179348)
</span><span class="lines">@@ -35,8 +35,8 @@
</span><span class="cx">
</span><span class="cx"> static const bool verbose = false;
</span><span class="cx">
</span><del>-CodeBlockSet::CodeBlockSet(BlockAllocator& blockAllocator)
- : m_currentlyExecuting(blockAllocator)
</del><ins>+CodeBlockSet::CodeBlockSet()
+ : m_currentlyExecuting()
</ins><span class="cx"> {
</span><span class="cx"> }
</span><span class="cx">
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoreheapCodeBlockSeth"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/heap/CodeBlockSet.h (179347 => 179348)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/heap/CodeBlockSet.h        2015-01-29 18:38:51 UTC (rev 179347)
+++ trunk/Source/JavaScriptCore/heap/CodeBlockSet.h        2015-01-29 19:20:06 UTC (rev 179348)
</span><span class="lines">@@ -36,7 +36,6 @@
</span><span class="cx">
</span><span class="cx"> namespace JSC {
</span><span class="cx">
</span><del>-class BlockAllocator;
</del><span class="cx"> class CodeBlock;
</span><span class="cx"> class Heap;
</span><span class="cx"> class JSCell;
</span><span class="lines">@@ -50,7 +49,7 @@
</span><span class="cx"> WTF_MAKE_NONCOPYABLE(CodeBlockSet);
</span><span class="cx">
</span><span class="cx"> public:
</span><del>- CodeBlockSet(BlockAllocator&);
</del><ins>+ CodeBlockSet();
</ins><span class="cx"> ~CodeBlockSet();
</span><span class="cx">
</span><span class="cx"> // Add a CodeBlock. This is only called by CodeBlock constructors.
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoreheapGCSegmentedArrayh"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/heap/GCSegmentedArray.h (179347 => 179348)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/heap/GCSegmentedArray.h        2015-01-29 18:38:51 UTC (rev 179347)
+++ trunk/Source/JavaScriptCore/heap/GCSegmentedArray.h        2015-01-29 19:20:06 UTC (rev 179348)
</span><span class="lines">@@ -26,26 +26,25 @@
</span><span class="cx"> #ifndef GCSegmentedArray_h
</span><span class="cx"> #define GCSegmentedArray_h
</span><span class="cx">
</span><del>-#include "HeapBlock.h"
</del><ins>+#include <wtf/DoublyLinkedList.h>
</ins><span class="cx"> #include <wtf/Vector.h>
</span><span class="cx">
</span><span class="cx"> namespace JSC {
</span><span class="cx">
</span><del>-class BlockAllocator;
-class DeadBlock;
-
</del><span class="cx"> template <typename T>
</span><del>-class GCArraySegment : public HeapBlock<GCArraySegment<T>> {
</del><ins>+class GCArraySegment : public DoublyLinkedListNode<GCArraySegment<T>> {
+ friend class WTF::DoublyLinkedListNode<GCArraySegment<T>>;
</ins><span class="cx"> public:
</span><del>- GCArraySegment(Region* region)
- : HeapBlock<GCArraySegment>(region)
</del><ins>+ GCArraySegment()
+ : DoublyLinkedListNode<GCArraySegment<T>>()
</ins><span class="cx"> #if !ASSERT_DISABLED
</span><span class="cx"> , m_top(0)
</span><span class="cx"> #endif
</span><span class="cx"> {
</span><span class="cx"> }
</span><span class="cx">
</span><del>- static GCArraySegment* create(DeadBlock*);
</del><ins>+ static GCArraySegment* create();
+ static void destroy(GCArraySegment*);
</ins><span class="cx">
</span><span class="cx"> T* data()
</span><span class="cx"> {
</span><span class="lines">@@ -54,6 +53,8 @@
</span><span class="cx">
</span><span class="cx"> static const size_t blockSize = 4 * KB;
</span><span class="cx">
</span><ins>+ GCArraySegment* m_prev;
+ GCArraySegment* m_next;
</ins><span class="cx"> #if !ASSERT_DISABLED
</span><span class="cx"> size_t m_top;
</span><span class="cx"> #endif
</span><span class="lines">@@ -66,7 +67,7 @@
</span><span class="cx"> friend class GCSegmentedArrayIterator<T>;
</span><span class="cx"> friend class GCSegmentedArrayIterator<const T>;
</span><span class="cx"> public:
</span><del>- GCSegmentedArray(BlockAllocator&);
</del><ins>+ GCSegmentedArray();
</ins><span class="cx"> ~GCSegmentedArray();
</span><span class="cx">
</span><span class="cx"> void append(T);
</span><span class="lines">@@ -101,7 +102,6 @@
</span><span class="cx"> void validatePrevious();
</span><span class="cx">
</span><span class="cx"> DoublyLinkedList<GCArraySegment<T>> m_segments;
</span><del>- BlockAllocator& m_blockAllocator;
</del><span class="cx">
</span><span class="cx"> JS_EXPORT_PRIVATE static const size_t s_segmentCapacity = CapacityFromSize<GCArraySegment<T>::blockSize>::value;
</span><span class="cx"> size_t m_top;
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoreheapGCSegmentedArrayInlinesh"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/heap/GCSegmentedArrayInlines.h (179347 => 179348)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/heap/GCSegmentedArrayInlines.h        2015-01-29 18:38:51 UTC (rev 179347)
+++ trunk/Source/JavaScriptCore/heap/GCSegmentedArrayInlines.h        2015-01-29 19:20:06 UTC (rev 179348)
</span><span class="lines">@@ -26,18 +26,16 @@
</span><span class="cx"> #ifndef GCSegmentedArrayInlines_h
</span><span class="cx"> #define GCSegmentedArrayInlines_h
</span><span class="cx">
</span><del>-#include "BlockAllocator.h"
</del><span class="cx"> #include "GCSegmentedArray.h"
</span><span class="cx">
</span><span class="cx"> namespace JSC {
</span><span class="cx">
</span><span class="cx"> template <typename T>
</span><del>-GCSegmentedArray<T>::GCSegmentedArray(BlockAllocator& blockAllocator)
- : m_blockAllocator(blockAllocator)
- , m_top(0)
</del><ins>+GCSegmentedArray<T>::GCSegmentedArray()
+ : m_top(0)
</ins><span class="cx"> , m_numberOfSegments(0)
</span><span class="cx"> {
</span><del>- m_segments.push(GCArraySegment<T>::create(m_blockAllocator.allocate<GCArraySegment<T>>()));
</del><ins>+ m_segments.push(GCArraySegment<T>::create());
</ins><span class="cx"> m_numberOfSegments++;
</span><span class="cx"> }
</span><span class="cx">
</span><span class="lines">@@ -46,7 +44,7 @@
</span><span class="cx"> {
</span><span class="cx"> ASSERT(m_numberOfSegments == 1);
</span><span class="cx"> ASSERT(m_segments.size() == 1);
</span><del>- m_blockAllocator.deallocate(GCArraySegment<T>::destroy(m_segments.removeHead()));
</del><ins>+ GCArraySegment<T>::destroy(m_segments.removeHead());
</ins><span class="cx"> m_numberOfSegments--;
</span><span class="cx"> ASSERT(!m_numberOfSegments);
</span><span class="cx"> ASSERT(!m_segments.size());
</span><span class="lines">@@ -61,7 +59,7 @@
</span><span class="cx"> for (GCArraySegment<T>* current = m_segments.head(); current->next(); current = next) {
</span><span class="cx"> next = current->next();
</span><span class="cx"> m_segments.remove(current);
</span><del>- m_blockAllocator.deallocate(GCArraySegment<T>::destroy(current));
</del><ins>+ GCArraySegment<T>::destroy(current);
</ins><span class="cx"> }
</span><span class="cx"> m_top = 0;
</span><span class="cx"> m_numberOfSegments = 1;
</span><span class="lines">@@ -75,7 +73,7 @@
</span><span class="cx"> {
</span><span class="cx"> ASSERT(m_segments.head()->m_top == s_segmentCapacity);
</span><span class="cx">
</span><del>- GCArraySegment<T>* nextSegment = GCArraySegment<T>::create(m_blockAllocator.allocate<GCArraySegment<T>>());
</del><ins>+ GCArraySegment<T>* nextSegment = GCArraySegment<T>::create();
</ins><span class="cx"> m_numberOfSegments++;
</span><span class="cx">
</span><span class="cx"> #if !ASSERT_DISABLED
</span><span class="lines">@@ -93,7 +91,7 @@
</span><span class="cx"> validatePrevious();
</span><span class="cx"> if (top())
</span><span class="cx"> return true;
</span><del>- m_blockAllocator.deallocate(GCArraySegment<T>::destroy(m_segments.removeHead()));
</del><ins>+ GCArraySegment<T>::destroy(m_segments.removeHead());
</ins><span class="cx"> ASSERT(m_numberOfSegments > 1);
</span><span class="cx"> m_numberOfSegments--;
</span><span class="cx"> setTopForFullSegment();
</span><span class="lines">@@ -127,12 +125,19 @@
</span><span class="cx"> }
</span><span class="cx">
</span><span class="cx"> template <typename T>
</span><del>-inline GCArraySegment<T>* GCArraySegment<T>::create(DeadBlock* block)
</del><ins>+inline GCArraySegment<T>* GCArraySegment<T>::create()
</ins><span class="cx"> {
</span><del>- return new (NotNull, block) GCArraySegment<T>(block->region());
</del><ins>+ return new (NotNull, fastMalloc(blockSize)) GCArraySegment<T>();
</ins><span class="cx"> }
</span><span class="cx">
</span><span class="cx"> template <typename T>
</span><ins>+inline void GCArraySegment<T>::destroy(GCArraySegment* segment)
+{
+ segment->~GCArraySegment();
+ fastFree(segment);
+}
+
+template <typename T>
</ins><span class="cx"> inline size_t GCSegmentedArray<T>::postIncTop()
</span><span class="cx"> {
</span><span class="cx"> size_t result = m_top++;
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoreheapGCThreadSharedDatacpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/heap/GCThreadSharedData.cpp (179347 => 179348)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/heap/GCThreadSharedData.cpp        2015-01-29 18:38:51 UTC (rev 179347)
+++ trunk/Source/JavaScriptCore/heap/GCThreadSharedData.cpp        2015-01-29 19:20:06 UTC (rev 179348)
</span><span class="lines">@@ -73,7 +73,7 @@
</span><span class="cx"> : m_vm(vm)
</span><span class="cx"> , m_copiedSpace(&vm->heap.m_storageSpace)
</span><span class="cx"> , m_shouldHashCons(false)
</span><del>- , m_sharedMarkStack(vm->heap.blockAllocator())
</del><ins>+ , m_sharedMarkStack()
</ins><span class="cx"> , m_numberOfActiveParallelMarkers(0)
</span><span class="cx"> , m_parallelMarkersShouldExit(false)
</span><span class="cx"> , m_copyIndex(0)
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoreheapHeapcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/heap/Heap.cpp (179347 => 179348)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/heap/Heap.cpp        2015-01-29 18:38:51 UTC (rev 179347)
+++ trunk/Source/JavaScriptCore/heap/Heap.cpp        2015-01-29 19:20:06 UTC (rev 179348)
</span><span class="lines">@@ -317,7 +317,7 @@
</span><span class="cx"> , m_slotVisitor(m_sharedData)
</span><span class="cx"> , m_copyVisitor(m_sharedData)
</span><span class="cx"> , m_handleSet(vm)
</span><del>- , m_codeBlocks(m_blockAllocator)
</del><ins>+ , m_codeBlocks()
</ins><span class="cx"> , m_isSafeToCollect(false)
</span><span class="cx"> , m_writeBarrierBuffer(256)
</span><span class="cx"> , m_vm(vm)
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoreheapMarkStackcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/heap/MarkStack.cpp (179347 => 179348)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/heap/MarkStack.cpp        2015-01-29 18:38:51 UTC (rev 179347)
+++ trunk/Source/JavaScriptCore/heap/MarkStack.cpp        2015-01-29 19:20:06 UTC (rev 179348)
</span><span class="lines">@@ -30,8 +30,8 @@
</span><span class="cx">
</span><span class="cx"> namespace JSC {
</span><span class="cx">
</span><del>-MarkStackArray::MarkStackArray(BlockAllocator& blockAllocator)
- : GCSegmentedArray<const JSCell*>(blockAllocator)
</del><ins>+MarkStackArray::MarkStackArray()
+ : GCSegmentedArray<const JSCell*>()
</ins><span class="cx"> {
</span><span class="cx"> }
</span><span class="cx">
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoreheapMarkStackh"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/heap/MarkStack.h (179347 => 179348)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/heap/MarkStack.h        2015-01-29 18:38:51 UTC (rev 179347)
+++ trunk/Source/JavaScriptCore/heap/MarkStack.h        2015-01-29 19:20:06 UTC (rev 179348)
</span><span class="lines">@@ -34,7 +34,7 @@
</span><span class="cx">
</span><span class="cx"> class MarkStackArray : public GCSegmentedArray<const JSCell*> {
</span><span class="cx"> public:
</span><del>- MarkStackArray(BlockAllocator&);
</del><ins>+ MarkStackArray();
</ins><span class="cx">
</span><span class="cx"> void donateSomeCellsTo(MarkStackArray& other);
</span><span class="cx"> void stealSomeCellsFrom(MarkStackArray& other, size_t idleThreadCount);
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoreheapSlotVisitorcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/heap/SlotVisitor.cpp (179347 => 179348)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/heap/SlotVisitor.cpp        2015-01-29 18:38:51 UTC (rev 179347)
+++ trunk/Source/JavaScriptCore/heap/SlotVisitor.cpp        2015-01-29 19:20:06 UTC (rev 179348)
</span><span class="lines">@@ -17,7 +17,7 @@
</span><span class="cx"> namespace JSC {
</span><span class="cx">
</span><span class="cx"> SlotVisitor::SlotVisitor(GCThreadSharedData& shared)
</span><del>- : m_stack(shared.m_vm->heap.blockAllocator())
</del><ins>+ : m_stack()
</ins><span class="cx"> , m_bytesVisited(0)
</span><span class="cx"> , m_bytesCopied(0)
</span><span class="cx"> , m_visitCount(0)
</span></span></pre>
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