Reapply "Initial implementation of on-stack replacement (OSR)."

runtime/vm/stack_frame.h

 // 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.
 
 #ifndef VM_STACK_FRAME_H_
 #define VM_STACK_FRAME_H_
 
 #include "vm/allocation.h"
 #include "vm/object.h"
 #include "vm/stub_code.h"
@@ skipping 57 matching lines @@
   virtual bool IsStubFrame() const;
   virtual bool IsEntryFrame() const { return false; }
   virtual bool IsExitFrame() const { return false; }
 
   RawFunction* LookupDartFunction() const;
   RawCode* LookupDartCode() const;
   bool FindExceptionHandler(uword* handler_pc) const;
   // Returns token_pos of the pc(), or -1 if none exists.
   intptr_t GetTokenPos() const;
 
-
  protected:
   StackFrame() : fp_(0), sp_(0), pc_(0) { }
 
   // Name of the frame, used for generic frame printing functionality.
   virtual const char* GetName() const { return IsStubFrame()? "stub" : "dart"; }
 
  private:
   RawCode* GetCodeObject() const;
 
   uword GetCallerSp() const {
@@ skipping 200 matching lines @@
   uword pc_;
   GrowableArray<DeoptInstr*> deopt_instructions_;
   Array& object_table_;
 
   DISALLOW_COPY_AND_ASSIGN(InlinedFunctionsIterator);
 };
 
 }  // namespace dart
 
 #endif  // VM_STACK_FRAME_H_
-