Disallow object/function templates when creating snapshots.

src/api.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/api.h"
 
 #include <string.h>  // For memcpy, strlen.
 #ifdef V8_USE_ADDRESS_SANITIZER
 #include <sanitizer/asan_interface.h>
 #endif  // V8_USE_ADDRESS_SANITIZER
@@ skipping 737 matching lines @@
   return Utils::ToLocal(obj);
 }
 
 Local<FunctionTemplate> FunctionTemplate::New(
     Isolate* isolate,
     FunctionCallback callback,
     v8::Handle<Value> data,
     v8::Handle<Signature> signature,
     int length) {
   i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate);
+  // Changes to the environment cannot be captured in the snapshot. Expect no
+  // function templates when the isolate is created for serialization.
+  DCHECK(!i_isolate->serializer_enabled());
   LOG_API(i_isolate, "FunctionTemplate::New");
   ENTER_V8(i_isolate);
   return FunctionTemplateNew(
       i_isolate, callback, data, signature, length, false);
 }
 
 
 Local<Signature> Signature::New(Isolate* isolate,
                                 Handle<FunctionTemplate> receiver, int argc,
                                 Handle<FunctionTemplate> argv[]) {
@@ skipping 319 matching lines @@
 
 
 Local<ObjectTemplate> ObjectTemplate::New() {
   return New(i::Isolate::Current(), Local<FunctionTemplate>());
 }
 
 
 Local<ObjectTemplate> ObjectTemplate::New(
     i::Isolate* isolate,
     v8::Handle<FunctionTemplate> constructor) {
+  // Changes to the environment cannot be captured in the snapshot. Expect no
+  // object templates when the isolate is created for serialization.
+  DCHECK(!isolate->serializer_enabled());
   LOG_API(isolate, "ObjectTemplate::New");
   ENTER_V8(isolate);
   i::Handle<i::Struct> struct_obj =
       isolate->factory()->NewStruct(i::OBJECT_TEMPLATE_INFO_TYPE);
   i::Handle<i::ObjectTemplateInfo> obj =
       i::Handle<i::ObjectTemplateInfo>::cast(struct_obj);
   InitializeTemplate(obj, Consts::OBJECT_TEMPLATE);
   if (!constructor.IsEmpty())
     obj->set_constructor(*Utils::OpenHandle(*constructor));
   obj->set_internal_field_count(i::Smi::FromInt(0));
@@ skipping 6588 matching lines @@
   Isolate* isolate = reinterpret_cast<Isolate*>(info.GetIsolate());
   Address callback_address =
       reinterpret_cast<Address>(reinterpret_cast<intptr_t>(callback));
   VMState<EXTERNAL> state(isolate);
   ExternalCallbackScope call_scope(isolate, callback_address);
   callback(info);
 }
 
 
 } }  // namespace v8::internal