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

src/objects-printer.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 <iomanip>
 #include <memory>
 
 #include "src/bootstrapper.h"
@@ skipping 135 matching lines @@
       break;
     case JS_OBJECT_TYPE:  // fall through
     case JS_API_OBJECT_TYPE:
     case JS_SPECIAL_API_OBJECT_TYPE:
     case JS_CONTEXT_EXTENSION_OBJECT_TYPE:
     case JS_GENERATOR_OBJECT_TYPE:
     case JS_ASYNC_GENERATOR_OBJECT_TYPE:
     case JS_ARGUMENTS_TYPE:
     case JS_ERROR_TYPE:
     case JS_PROMISE_CAPABILITY_TYPE:
+    case WASM_INSTANCE_TYPE:  // TODO(titzer): debug printing for wasm objects
+    case WASM_MEMORY_TYPE:
+    case WASM_MODULE_TYPE:
+    case WASM_TABLE_TYPE:
       JSObject::cast(this)->JSObjectPrint(os);
       break;
     case JS_PROMISE_TYPE:
       JSPromise::cast(this)->JSPromisePrint(os);
       break;
     case JS_ARRAY_TYPE:
       JSArray::cast(this)->JSArrayPrint(os);
       break;
     case JS_REGEXP_TYPE:
       JSRegExp::cast(this)->JSRegExpPrint(os);
@@ skipping 1670 matching lines @@
 extern void _v8_internal_Print_TransitionTree(void* object) {
   i::Object* o = reinterpret_cast<i::Object*>(object);
   if (!o->IsMap()) {
     printf("Please provide a valid Map\n");
   } else {
 #if defined(DEBUG) || defined(OBJECT_PRINT)
     i::TransitionArray::PrintTransitionTree(reinterpret_cast<i::Map*>(object));
 #endif
   }
 }