Add a flags field to RawObject so that we can tag objects with certain

vm/object.cc

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/object.h"
 
 #include "vm/assembler.h"
 #include "vm/assert.h"
 #include "vm/bigint_operations.h"
 #include "vm/bootstrap.h"
@@ skipping 697 matching lines @@
                             Heap::Space space) {
   Isolate* isolate = Isolate::Current();
   Heap* heap = isolate->heap();
 
   // TODO(iposva): Get a proper halt instruction from the assembler.
   uword address = heap->Allocate(size, space);
   NoGCScope no_gc;
   InitializeObject(address, size);
   RawObject* raw_obj = reinterpret_cast<RawObject*>(address + kHeapObjectTag);
   raw_obj->ptr()->class_ = cls.raw();
+  raw_obj->ptr()->tags_ = 0;
   return raw_obj;
 }
 
 
 RawString* Class::Name() const {
   if (raw_ptr()->name_ != String::null()) {
     return raw_ptr()->name_;
   }
   ASSERT(class_class() != null_);  // Or GetSingletonClassIndex will not work.
   intptr_t index = GetSingletonClassIndex(raw());
@@ skipping 4419 matching lines @@
   return cls.TestType(test, type_arguments, other_class, other_type_arguments);
 }
 
 
 bool Instance::IsValidNativeIndex(int index) const {
   const Class& cls = Class::Handle(clazz());
   return (index >= 0 && index < cls.num_native_fields());
 }
 
 
-  RawInstance* Instance::New(const Class& cls, Heap::Space space) {
+RawInstance* Instance::New(const Class& cls, Heap::Space space) {
   Instance& result = Instance::Handle();
   {
     intptr_t instance_size = cls.instance_size();
     ASSERT(instance_size > 0);
     RawObject* raw = Object::Allocate(cls, instance_size, space);
     NoGCScope no_gc;
     result ^= raw;
     uword addr = reinterpret_cast<uword>(result.raw_ptr());
     // Initialize fields.
     intptr_t offset = sizeof(RawObject);
@@ skipping 2152 matching lines @@
   const String& str = String::Handle(pattern());
   const char* format = "JSRegExp: pattern=%s flags=%s";
   intptr_t len = OS::SNPrint(NULL, 0, format, str.ToCString(), Flags());
   char* chars = reinterpret_cast<char*>(
       Isolate::Current()->current_zone()->Allocate(len + 1));
   OS::SNPrint(chars, (len + 1), format, str.ToCString(), Flags());
   return chars;
 }
 
 }  // namespace dart