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

src/wasm/module-compiler.cc

 // Copyright 2017 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/wasm/module-compiler.h>
 
 #include <atomic>
 
 #include "src/asmjs/asm-js.h"
 #include "src/assembler-inl.h"
@@ skipping 1000 matching lines @@
 
   //--------------------------------------------------------------------------
   // Set up the exports object for the new instance.
   //--------------------------------------------------------------------------
   ProcessExports(code_table, instance, compiled_module_);
   if (thrower_->error()) return {};
 
   //--------------------------------------------------------------------------
   // Add instance to Memory object
   //--------------------------------------------------------------------------
-  DCHECK(wasm::IsWasmInstance(*instance));
+  DCHECK(instance->IsWasmInstanceObject());
   if (instance->has_memory_object()) {
     instance->memory_object()->AddInstance(isolate_, instance);
   }
 
   //--------------------------------------------------------------------------
   // Initialize the indirect function tables.
   //--------------------------------------------------------------------------
   if (function_table_count > 0) LoadTableSegments(code_table, instance);
 
   // Patch all code with the relocations registered in code_specialization.
@@ skipping 31 matching lines @@
     // Publish the new instance to the instances chain.
     {
       DisallowHeapAllocation no_gc;
       if (!link_to_original.is_null()) {
         compiled_module_->set_weak_next_instance(
             link_to_original.ToHandleChecked());
         original.ToHandleChecked()->set_weak_prev_instance(link_to_clone);
         compiled_module_->set_weak_wasm_module(
             original.ToHandleChecked()->weak_wasm_module());
       }
-      module_object_->SetEmbedderField(0, *compiled_module_);
+      module_object_->set_compiled_module(*compiled_module_);
       compiled_module_->set_weak_owning_instance(link_to_owning_instance);
       GlobalHandles::MakeWeak(
           global_handle.location(), global_handle.location(),
           instance_finalizer_callback_, v8::WeakCallbackType::kFinalizer);
     }
   }
 
   //--------------------------------------------------------------------------
   // Debugging support.
   //--------------------------------------------------------------------------
@@ skipping 303 matching lines @@
         // provided.
         DCHECK(!instance->has_memory_object());
         if (!WasmJs::IsWasmMemoryObject(isolate_, value)) {
           ReportLinkError("memory import must be a WebAssembly.Memory object",
                           index, module_name, import_name);
           return -1;
         }
         auto memory = Handle<WasmMemoryObject>::cast(value);
         DCHECK(WasmJs::IsWasmMemoryObject(isolate_, memory));
         instance->set_memory_object(*memory);
-        memory_ = Handle<JSArrayBuffer>(memory->buffer(), isolate_);
+        memory_ = Handle<JSArrayBuffer>(memory->array_buffer(), isolate_);
         uint32_t imported_cur_pages = static_cast<uint32_t>(
             memory_->byte_length()->Number() / WasmModule::kPageSize);
         if (imported_cur_pages < module_->min_mem_pages) {
           thrower_->LinkError(
               "memory import %d is smaller than maximum %u, got %u", index,
               module_->min_mem_pages, imported_cur_pages);
         }
         int32_t imported_max_pages = memory->maximum_pages();
         if (module_->has_max_mem) {
           if (imported_max_pages < 0) {
@@ skipping 249 matching lines @@
           memory_object = WasmMemoryObject::New(
               isolate_,
               (instance->has_memory_buffer())
                   ? handle(instance->memory_buffer())
                   : Handle<JSArrayBuffer>::null(),
               (module_->max_mem_pages != 0) ? module_->max_mem_pages : -1);
           instance->set_memory_object(*memory_object);
         } else {
           memory_object =
               Handle<WasmMemoryObject>(instance->memory_object(), isolate_);
-          DCHECK(WasmJs::IsWasmMemoryObject(isolate_, memory_object));
           memory_object->ResetInstancesLink(isolate_);
         }
 
         desc.set_value(memory_object);
         break;
       }
       case kExternalGlobal: {
         // Export the value of the global variable as a number.
         WasmGlobal& global = module_->globals[exp.index];
         double num = 0;
@@ skipping 673 matching lines @@
     HandleScope scope(job_->isolate_);
     Handle<WasmModuleObject> result =
         WasmModuleObject::New(job_->isolate_, job_->compiled_module_);
     // {job_} is deleted in AsyncCompileSucceeded, therefore the {return}.
     return job_->AsyncCompileSucceeded(result);
   }
 };
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8