Mark weak fields of JSArrayBuffer and JSArrayBufferView as weak in heap snapshot.

src/heap-snapshot-generator.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * 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
@@ skipping 1112 matching lines @@
     GlobalObject* global_obj = GlobalObject::cast(obj);
     SetInternalReference(global_obj, entry,
                          "builtins", global_obj->builtins(),
                          GlobalObject::kBuiltinsOffset);
     SetInternalReference(global_obj, entry,
                          "native_context", global_obj->native_context(),
                          GlobalObject::kNativeContextOffset);
     SetInternalReference(global_obj, entry,
                          "global_receiver", global_obj->global_receiver(),
                          GlobalObject::kGlobalReceiverOffset);
+  } else if (obj->IsJSArrayBufferView()) {
+    JSArrayBufferView* view = JSArrayBufferView::cast(obj);
+    SetInternalReference(view, entry, "buffer", view->buffer(),
+                         JSArrayBufferView::kBufferOffset);
+    SetWeakReference(view, entry, 1, view->weak_next(),
+                     JSArrayBufferView::kWeakNextOffset);
+  } else if (obj->IsJSArrayBuffer()) {
+    JSArrayBuffer* buffer = JSArrayBuffer::cast(obj);
+    SetWeakReference(buffer, entry, 1, buffer->weak_next(),
+                     JSArrayBuffer::kWeakNextOffset);
+    SetWeakReference(buffer, entry, 2, buffer->weak_first_view(),
+                     JSArrayBuffer::kWeakFirstViewOffset);
   }
   TagObject(js_obj->properties(), "(object properties)");
   SetInternalReference(obj, entry,
                        "properties", js_obj->properties(),
                        JSObject::kPropertiesOffset);
   TagObject(js_obj->elements(), "(object elements)");
   SetInternalReference(obj, entry,
                        "elements", js_obj->elements(),
                        JSObject::kElementsOffset);
 }
@@ skipping 1811 matching lines @@
   writer_->AddString("\"<dummy>\"");
   for (int i = 1; i < sorted_strings.length(); ++i) {
     writer_->AddCharacter(',');
     SerializeString(sorted_strings[i]);
     if (writer_->aborted()) return;
   }
 }
 
 
 } }  // namespace v8::internal