Move hash code from hidden string to a private symbol

test/cctest/test-weakmaps.cc

 // Copyright 2011 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 71 matching lines @@
     key = global_handles->Create(*object);
   }
   CHECK(!global_handles->IsWeak(key.location()));
 
   // Put two chained entries into weak map.
   {
     HandleScope scope(isolate);
     Handle<Map> map = factory->NewMap(JS_OBJECT_TYPE, JSObject::kHeaderSize);
     Handle<JSObject> object = factory->NewJSObjectFromMap(map);
     Handle<Smi> smi(Smi::FromInt(23), isolate);
-    Runtime::WeakCollectionSet(weakmap, key, object);
-    Runtime::WeakCollectionSet(weakmap, object, smi);
+    int32_t hash = Object::GetOrCreateHash(isolate, key)->value();
+    Runtime::WeakCollectionSet(weakmap, key, object, hash);
+    int32_t object_hash = Object::GetOrCreateHash(isolate, object)->value();
+    Runtime::WeakCollectionSet(weakmap, object, smi, object_hash);
   }
   CHECK_EQ(2, ObjectHashTable::cast(weakmap->table())->NumberOfElements());
 
   // Force a full GC.
   heap->CollectAllGarbage(false);
   CHECK_EQ(0, NumberOfWeakCalls);
   CHECK_EQ(2, ObjectHashTable::cast(weakmap->table())->NumberOfElements());
   CHECK_EQ(
       0, ObjectHashTable::cast(weakmap->table())->NumberOfDeletedElements());
 
@@ skipping 34 matching lines @@
   // Check initial capacity.
   CHECK_EQ(32, ObjectHashTable::cast(weakmap->table())->Capacity());
 
   // Fill up weak map to trigger capacity change.
   {
     HandleScope scope(isolate);
     Handle<Map> map = factory->NewMap(JS_OBJECT_TYPE, JSObject::kHeaderSize);
     for (int i = 0; i < 32; i++) {
       Handle<JSObject> object = factory->NewJSObjectFromMap(map);
       Handle<Smi> smi(Smi::FromInt(i), isolate);
-      Runtime::WeakCollectionSet(weakmap, object, smi);
+      int32_t object_hash = Object::GetOrCreateHash(isolate, object)->value();
+      Runtime::WeakCollectionSet(weakmap, object, smi, object_hash);
     }
   }
 
   // Check increased capacity.
   CHECK_EQ(128, ObjectHashTable::cast(weakmap->table())->Capacity());
 
   // Force a full GC.
   CHECK_EQ(32, ObjectHashTable::cast(weakmap->table())->NumberOfElements());
   CHECK_EQ(
       0, ObjectHashTable::cast(weakmap->table())->NumberOfDeletedElements());
@@ skipping 27 matching lines @@
   int dummy_array_size = Page::kMaxRegularHeapObjectSize - 92 * KB;
   factory->NewFixedArray(dummy_array_size / kPointerSize, TENURED);
 
   // Fill up weak map with values on an evacuation candidate.
   {
     HandleScope scope(isolate);
     for (int i = 0; i < 32; i++) {
       Handle<JSObject> object = factory->NewJSObject(function, TENURED);
       CHECK(!heap->InNewSpace(object->address()));
       CHECK(!first_page->Contains(object->address()));
-      Runtime::WeakCollectionSet(weakmap, key, object);
+      int32_t hash = Object::GetOrCreateHash(isolate, key)->value();
+      Runtime::WeakCollectionSet(weakmap, key, object, hash);
     }
   }
 
   // Force compacting garbage collection.
   CHECK(FLAG_always_compact);
   heap->CollectAllGarbage();
 }
 
 
 // Test that weak map keys on an evacuation candidate which are reachable by
@@ skipping 21 matching lines @@
   // Fill up weak map with keys on an evacuation candidate.
   Handle<JSObject> keys[32];
   for (int i = 0; i < 32; i++) {
     keys[i] = factory->NewJSObject(function, TENURED);
     CHECK(!heap->InNewSpace(keys[i]->address()));
     CHECK(!first_page->Contains(keys[i]->address()));
   }
   Handle<JSWeakMap> weakmap = AllocateJSWeakMap(isolate);
   for (int i = 0; i < 32; i++) {
     Handle<Smi> smi(Smi::FromInt(i), isolate);
-    Runtime::WeakCollectionSet(weakmap, keys[i], smi);
+    int32_t hash = Object::GetOrCreateHash(isolate, keys[i])->value();
+    Runtime::WeakCollectionSet(weakmap, keys[i], smi, hash);
   }
 
   // Force compacting garbage collection. The subsequent collections are used
   // to verify that key references were actually updated.
   CHECK(FLAG_always_compact);
   heap->CollectAllGarbage();
   heap->CollectAllGarbage();
   heap->CollectAllGarbage();
 }
 
 
 TEST(Regress399527) {
   CcTest::InitializeVM();
   v8::HandleScope scope(CcTest::isolate());
   Isolate* isolate = CcTest::i_isolate();
   Heap* heap = isolate->heap();
   {
     HandleScope scope(isolate);
     AllocateJSWeakMap(isolate);
     SimulateIncrementalMarking(heap);
   }
   // The weak map is marked black here but leaving the handle scope will make
   // the object unreachable. Aborting incremental marking will clear all the
   // marking bits which makes the weak map garbage.
   heap->CollectAllGarbage();
 }