[heap] MinorMC: Only iterate new space global handles for ptr updates

src/global-handles.cc

 // Copyright 2009 the V8 project 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 "src/global-handles.h"
 
 #include "src/api.h"
 #include "src/cancelable-task.h"
 #include "src/objects-inl.h"
 #include "src/v8.h"
@@ skipping 927 matching lines @@
 
 DISABLE_CFI_PERF
 void GlobalHandles::IterateAllRoots(RootVisitor* v) {
   for (NodeIterator it(this); !it.done(); it.Advance()) {
     if (it.node()->IsRetainer()) {
       v->VisitRootPointer(Root::kGlobalHandles, it.node()->location());
     }
   }
 }
 
+DISABLE_CFI_PERF
+void GlobalHandles::IterateAllNewSpaceRoots(RootVisitor* v) {
+  for (int i = 0; i < new_space_nodes_.length(); ++i) {
+    Node* node = new_space_nodes_[i];
+    if (node->IsRetainer()) {
+      v->VisitRootPointer(Root::kGlobalHandles, node->location());
+    }
+  }
+}
 
 DISABLE_CFI_PERF
 void GlobalHandles::ApplyPersistentHandleVisitor(
     v8::PersistentHandleVisitor* visitor, GlobalHandles::Node* node) {
   v8::Value* value = ToApi<v8::Value>(Handle<Object>(node->location()));
   visitor->VisitPersistentHandle(
       reinterpret_cast<v8::Persistent<v8::Value>*>(&value),
       node->wrapper_class_id());
 }
 
@@ skipping 177 matching lines @@
   blocks_[block][offset] = object;
   if (isolate->heap()->InNewSpace(object)) {
     new_space_indices_.Add(size_);
   }
   *index = size_++;
 }
 
 
 }  // namespace internal
 }  // namespace v8