Save top StackResource in entry frame.

runtime/vm/allocation.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/allocation.h"
 
 #include "platform/assert.h"
 #include "vm/isolate.h"
 #include "vm/zone.h"
 
@@ skipping 18 matching lines @@
   return Allocate(size, isolate->current_zone());
 }
 
 
 void* ZoneAllocated::operator new(uword size, Zone* zone) {
   ASSERT(zone == Isolate::Current()->current_zone());
   return Allocate(size, zone);
 }
 
 
-void StackResource::Unwind(Isolate* isolate, uword stack_pointer) {
-  while (isolate->top_resource() != NULL &&
-         (reinterpret_cast<uword>(isolate->top_resource()) < stack_pointer)) {
-    isolate->top_resource()->~StackResource();
-  }
-#if defined(DEBUG)
-  // All remaining stack resources should be below stack_pointer.
-  StackResource* current = isolate->top_resource();
-  while (current != NULL) {
-    ASSERT(reinterpret_cast<uword>(current) >= stack_pointer);
-    current = current->previous_;
-  }
-#endif  // DEBUG
-}
-
-
-void StackResource::Unwind(Isolate* isolate, StackResource* new_top) {
+void StackResource::UnwindAbove(Isolate* isolate, StackResource* new_top) {
   StackResource* current_resource = isolate->top_resource();
   while (current_resource != new_top) {
     current_resource->~StackResource();
     current_resource = isolate->top_resource();
   }
 }
 
 }  // namespace dart