Change the stack map search to require an exact match.

runtime/vm/code_descriptors.h

 // 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.
 
 #ifndef VM_CODE_DESCRIPTORS_H_
 #define VM_CODE_DESCRIPTORS_H_
 
 #include "vm/globals.h"
 #include "vm/growable_array.h"
 #include "vm/object.h"
@@ skipping 45 matching lines @@
  private:
   GrowableArray<struct PcDesc> list_;
   DISALLOW_COPY_AND_ASSIGN(DescriptorList);
 };
 
 
 class StackmapBuilder : public ZoneAllocated {
  public:
   StackmapBuilder() :
       builder_(new BitmapBuilder()),
-      code_(Code::ZoneHandle()),
       stack_map_(Stackmap::ZoneHandle()),
       list_(GrowableObjectArray::ZoneHandle(
           GrowableObjectArray::New(Heap::kOld))) { }
   ~StackmapBuilder() { }
 
   // Gets state of stack slot (object or regular value).
   bool IsSlotObject(intptr_t stack_slot) const {
     ASSERT(builder_ != NULL);
     return builder_->Get(stack_slot);
   }
@@ skipping 22 matching lines @@
 
   bool Verify();
 
   RawArray* FinalizeStackmaps(const Code& code);
 
  private:
   intptr_t Length() const { return list_.Length(); }
   RawStackmap* Map(int index) const;
 
   BitmapBuilder* builder_;
-  Code& code_;
   Stackmap& stack_map_;
   GrowableObjectArray& list_;
   DISALLOW_COPY_AND_ASSIGN(StackmapBuilder);
 };
 
 
 class ExceptionHandlerList : public ZoneAllocated {
  public:
   struct HandlerDesc {
     intptr_t try_index;  // Try block index handled by the handler.
@@ skipping 34 matching lines @@
   }
 
  private:
   GrowableArray<struct HandlerDesc> list_;
   DISALLOW_COPY_AND_ASSIGN(ExceptionHandlerList);
 };
 
 }  // namespace dart
 
 #endif  // VM_CODE_DESCRIPTORS_H_