[api] Prototype WeakRef implementation

src/objects-debug.cc

 // Copyright 2012 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/objects.h"
 
 #include "src/assembler-inl.h"
 #include "src/bootstrapper.h"
 #include "src/disasm.h"
 #include "src/disassembler.h"
@@ skipping 198 matching lines @@
       break;
     case JS_ASYNC_FROM_SYNC_ITERATOR_TYPE:
       JSAsyncFromSyncIterator::cast(this)->JSAsyncFromSyncIteratorVerify();
       break;
     case JS_WEAK_MAP_TYPE:
       JSWeakMap::cast(this)->JSWeakMapVerify();
       break;
     case JS_WEAK_SET_TYPE:
       JSWeakSet::cast(this)->JSWeakSetVerify();
       break;
+    case JS_WEAK_REF_TYPE:
+      JSWeakRef::cast(this)->JSWeakRefVerify();
+      break;
     case JS_PROMISE_CAPABILITY_TYPE:
       JSPromiseCapability::cast(this)->JSPromiseCapabilityVerify();
       break;
     case JS_PROMISE_TYPE:
       JSPromise::cast(this)->JSPromiseVerify();
       break;
     case JS_REGEXP_TYPE:
       JSRegExp::cast(this)->JSRegExpVerify();
       break;
     case FILLER_TYPE:
@@ skipping 733 matching lines @@
   JSObjectVerify();
   VerifyHeapPointer(sync_iterator());
 }
 
 void JSWeakSet::JSWeakSetVerify() {
   CHECK(IsJSWeakSet());
   JSObjectVerify();
   VerifyHeapPointer(table());
   CHECK(table()->IsHashTable() || table()->IsUndefined(GetIsolate()));
 }
+void JSWeakRef::JSWeakRefVerify() {
+  CHECK(IsJSWeakRef());
+  JSObjectVerify();
+  VerifyHeapPointer(table());
+  CHECK(table()->IsHashTable() || table()->IsUndefined(GetIsolate()));
+}
 
 void JSPromiseCapability::JSPromiseCapabilityVerify() {
   CHECK(IsJSPromiseCapability());
   JSObjectVerify();
   VerifyPointer(promise());
   VerifyPointer(resolve());
   VerifyPointer(reject());
 }
 
 void JSPromise::JSPromiseVerify() {
@@ skipping 655 matching lines @@
 
   // Both are done at the same time.
   CHECK_EQ(new_it.done(), old_it.done());
 }
 
 
 #endif  // DEBUG
 
 }  // namespace internal
 }  // namespace v8