Add per thread heap enabled MarkingVisitorImpl

third_party/WebKit/Source/platform/heap/Visitor.cpp

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "platform/heap/Visitor.h"
 
 #include "platform/heap/BlinkGC.h"
 #include "platform/heap/MarkingVisitor.h"
 #include "platform/heap/ThreadState.h"
 
 namespace blink {
 
 PassOwnPtr<Visitor> Visitor::create(ThreadState* state, BlinkGC::GCType gcType)
 {
-    switch (gcType) {
-    case BlinkGC::GCWithSweep:
-    case BlinkGC::GCWithoutSweep:
-        return adoptPtr(new MarkingVisitor<Visitor::GlobalMarking>(state));
-    case BlinkGC::TakeSnapshot:
-        return adoptPtr(new MarkingVisitor<Visitor::SnapshotMarking>(state));
-    case BlinkGC::ThreadTerminationGC:
-        return adoptPtr(new MarkingVisitor<Visitor::ThreadLocalMarking>(state));
-    case BlinkGC::ThreadLocalWeakProcessing:
-        return adoptPtr(new MarkingVisitor<Visitor::WeakProcessing>(state));
-    default:
-        ASSERT_NOT_REACHED();
+    bool perThreadHeapEnabled = false;
+    if (perThreadHeapEnabled) {
+        switch (gcType) {
+        case BlinkGC::GCWithSweep:
+        case BlinkGC::GCWithoutSweep:
+            // InlinedGlobalMarkingVisitor does not support per thread heap disabled heaps.
+            return adoptPtr(new MarkingVisitor<Visitor::ThreadLocalMarking, true>(state));
+        case BlinkGC::TakeSnapshot:
+            return adoptPtr(new MarkingVisitor<Visitor::SnapshotMarking, true>(state));
+        case BlinkGC::ThreadTerminationGC:
+            return adoptPtr(new MarkingVisitor<Visitor::ThreadTerminationMarking, true>(state));
+        case BlinkGC::ThreadLocalWeakProcessing:
+            return adoptPtr(new MarkingVisitor<Visitor::WeakProcessing, true>(state));
+        default:
+            ASSERT_NOT_REACHED();
+        }
+    } else {
+        switch (gcType) {
+        case BlinkGC::GCWithSweep:
+        case BlinkGC::GCWithoutSweep:
+            return adoptPtr(new MarkingVisitor<Visitor::GlobalMarking, false>(state));
+        case BlinkGC::TakeSnapshot:
+            return adoptPtr(new MarkingVisitor<Visitor::SnapshotMarking, false>(state));
+        case BlinkGC::ThreadTerminationGC:
+            return adoptPtr(new MarkingVisitor<Visitor::ThreadTerminationMarking, false>(state));
+        case BlinkGC::ThreadLocalWeakProcessing:
+            return adoptPtr(new MarkingVisitor<Visitor::WeakProcessing, false>(state));
+        default:
+            ASSERT_NOT_REACHED();
+        }
     }
     return nullptr;
 }
 
 Visitor::Visitor(ThreadState* state, MarkingMode markingMode)
     : m_state(state)
     , m_markingMode(markingMode)
 {
     // See ThreadState::runScheduledGC() why we need to already be in a
     // GCForbiddenScope before any safe point is entered.
     m_state->enterGCForbiddenScope();
 
     ASSERT(m_state->checkThread());
 }
 
 Visitor::~Visitor()
 {
     m_state->leaveGCForbiddenScope();
 }
 
 } // namespace blink