[wasm] Introduce instance types for WebAssembly.* objects.

src/objects.cc

 // Copyright 2015 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 <cmath>
 #include <iomanip>
 #include <memory>
 #include <sstream>
@@ skipping 1272 matching lines @@
   Heap* heap = object->GetHeap();
   if (raw_elems->map() != heap->fixed_cow_array_map()) return;
   Isolate* isolate = heap->isolate();
   Handle<FixedArray> elems(raw_elems, isolate);
   Handle<FixedArray> writable_elems = isolate->factory()->CopyFixedArrayWithMap(
       elems, isolate->factory()->fixed_array_map());
   object->set_elements(*writable_elems);
   isolate->counters()->cow_arrays_converted()->Increment();
 }
 
+int JSObject::GetHeaderSize(InstanceType type) {
+  switch (type) {
+    case JS_OBJECT_TYPE:
+    case JS_API_OBJECT_TYPE:
+    case JS_SPECIAL_API_OBJECT_TYPE:
+      return JSObject::kHeaderSize;
+    case JS_GENERATOR_OBJECT_TYPE:
+      return JSGeneratorObject::kSize;
+    case JS_ASYNC_GENERATOR_OBJECT_TYPE:
+      return JSAsyncGeneratorObject::kSize;
+    case JS_GLOBAL_PROXY_TYPE:
+      return JSGlobalProxy::kSize;
+    case JS_GLOBAL_OBJECT_TYPE:
+      return JSGlobalObject::kSize;
+    case JS_BOUND_FUNCTION_TYPE:
+      return JSBoundFunction::kSize;
+    case JS_FUNCTION_TYPE:
+      return JSFunction::kSize;
+    case JS_VALUE_TYPE:
+      return JSValue::kSize;
+    case JS_DATE_TYPE:
+      return JSDate::kSize;
+    case JS_ARRAY_TYPE:
+      return JSArray::kSize;
+    case JS_ARRAY_BUFFER_TYPE:
+      return JSArrayBuffer::kSize;
+    case JS_TYPED_ARRAY_TYPE:
+      return JSTypedArray::kSize;
+    case JS_DATA_VIEW_TYPE:
+      return JSDataView::kSize;
+    case JS_SET_TYPE:
+      return JSSet::kSize;
+    case JS_MAP_TYPE:
+      return JSMap::kSize;
+    case JS_SET_ITERATOR_TYPE:
+      return JSSetIterator::kSize;
+    case JS_MAP_ITERATOR_TYPE:
+      return JSMapIterator::kSize;
+    case JS_WEAK_MAP_TYPE:
+      return JSWeakMap::kSize;
+    case JS_WEAK_SET_TYPE:
+      return JSWeakSet::kSize;
+    case JS_PROMISE_CAPABILITY_TYPE:
+      return JSPromiseCapability::kSize;
+    case JS_PROMISE_TYPE:
+      return JSPromise::kSize;
+    case JS_REGEXP_TYPE:
+      return JSRegExp::kSize;
+    case JS_CONTEXT_EXTENSION_OBJECT_TYPE:
+      return JSObject::kHeaderSize;
+    case JS_MESSAGE_OBJECT_TYPE:
+      return JSMessageObject::kSize;
+    case JS_ARGUMENTS_TYPE:
+      return JSArgumentsObject::kHeaderSize;
+    case JS_ERROR_TYPE:
+      return JSObject::kHeaderSize;
+    case JS_STRING_ITERATOR_TYPE:
+      return JSStringIterator::kSize;
+    case JS_MODULE_NAMESPACE_TYPE:
+      return JSModuleNamespace::kHeaderSize;
+    case WASM_INSTANCE_TYPE:
+      return WasmInstanceObject::kSize;
+    case WASM_MEMORY_TYPE:
+      return WasmMemoryObject::kSize;
+    case WASM_MODULE_TYPE:
+      return WasmModuleObject::kSize;
+    case WASM_TABLE_TYPE:
+      return WasmTableObject::kSize;
+    default:
+      if (type >= FIRST_ARRAY_ITERATOR_TYPE &&
+          type <= LAST_ARRAY_ITERATOR_TYPE) {
+        return JSArrayIterator::kSize;
+      }
+      UNREACHABLE();
+  }
+}
 
 // ES6 9.5.1
 // static
 MaybeHandle<Object> JSProxy::GetPrototype(Handle<JSProxy> proxy) {
   Isolate* isolate = proxy->GetIsolate();
   Handle<String> trap_name = isolate->factory()->getPrototypeOf_string();
 
   STACK_CHECK(isolate, MaybeHandle<Object>());
 
   // 1. Let handler be the value of the [[ProxyHandler]] internal slot.
@@ skipping 1701 matching lines @@
     case JS_FAST_SMI_ARRAY_VALUE_ITERATOR_TYPE:
     case JS_FAST_HOLEY_SMI_ARRAY_VALUE_ITERATOR_TYPE:
     case JS_FAST_ARRAY_VALUE_ITERATOR_TYPE:
     case JS_FAST_HOLEY_ARRAY_VALUE_ITERATOR_TYPE:
     case JS_FAST_DOUBLE_ARRAY_VALUE_ITERATOR_TYPE:
     case JS_FAST_HOLEY_DOUBLE_ARRAY_VALUE_ITERATOR_TYPE:
     case JS_GENERIC_ARRAY_VALUE_ITERATOR_TYPE:
 
     case JS_PROMISE_CAPABILITY_TYPE:
     case JS_PROMISE_TYPE:
+    case WASM_INSTANCE_TYPE:
+    case WASM_MEMORY_TYPE:
+    case WASM_MODULE_TYPE:
+    case WASM_TABLE_TYPE:
     case JS_BOUND_FUNCTION_TYPE:
       return has_unboxed_fields ? kVisitJSObject : kVisitJSObjectFast;
     case JS_API_OBJECT_TYPE:
     case JS_SPECIAL_API_OBJECT_TYPE:
       return kVisitJSApiObject;
 
     case JS_FUNCTION_TYPE:
       return kVisitJSFunction;
 
     case FILLER_TYPE:
@@ skipping 17104 matching lines @@
       // not
       // depend on this.
       return DICTIONARY_ELEMENTS;
     }
     DCHECK_LE(kind, LAST_ELEMENTS_KIND);
     return kind;
   }
 }
 }  // namespace internal
 }  // namespace v8