Land Ivan's change of 'Remove support for verified memory handling'

runtime/vm/raw_object.cc

 // Copyright (c) 2012, 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/raw_object.h"
 
 #include "vm/become.h"
 #include "vm/class_table.h"
 #include "vm/dart.h"
 #include "vm/freelist.h"
 #include "vm/isolate.h"
 #include "vm/object.h"
 #include "vm/visitor.h"
 
 
 namespace dart {
 
-#if defined(DEBUG)
-DEFINE_FLAG(bool, validate_overwrite, true, "Verify overwritten fields.");
-#endif  // DEBUG
-
-
 void RawObject::Validate(Isolate* isolate) const {
   if (Object::void_class_ == reinterpret_cast<RawClass*>(kHeapObjectTag)) {
     // Validation relies on properly initialized class classes. Skip if the
     // VM is still being initialized.
     return;
   }
   // All Smi values are valid.
   if (!IsHeapObject()) {
     return;
   }
@@ skipping 186 matching lines @@
   }
   if ((instance_size != tags_size) && (tags_size != 0)) {
     FATAL3("Size mismatch: %" Pd " from class vs %" Pd " from tags %" Px "\n",
            instance_size, tags_size, tags);
   }
 #endif  // DEBUG
   return instance_size;
 }
 
 
-#if defined(DEBUG)
-void RawObject::ValidateOverwrittenPointer(RawObject* raw) {
-  if (FLAG_validate_overwrite) {
-    raw->Validate(Isolate::Current());
-  }
-}
-
-
-void RawObject::ValidateOverwrittenSmi(RawSmi* raw) {
-  if (FLAG_validate_overwrite && raw->IsHeapObject() && raw != Object::null()) {
-    FATAL1("Expected smi/null, found: %" Px "\n", reinterpret_cast<uword>(raw));
-  }
-}
-#endif  // DEBUG
-
-
 intptr_t RawObject::VisitPointers(ObjectPointerVisitor* visitor) {
   intptr_t size = 0;
 
   // Only reasonable to be called on heap objects.
   ASSERT(IsHeapObject());
 
   // Read the necessary data out of the class before visting the class itself.
   intptr_t class_id = GetClassId();
 
   if (class_id < kNumPredefinedCids) {
@@ skipping 720 matching lines @@
 intptr_t RawUserTag::VisitUserTagPointers(
     RawUserTag* raw_obj, ObjectPointerVisitor* visitor) {
   // Make sure that we got here with the tagged pointer as this.
   ASSERT(raw_obj->IsHeapObject());
   visitor->VisitPointers(raw_obj->from(), raw_obj->to());
   return UserTag::InstanceSize();
 }
 
 
 }  // namespace dart