VM: New calling convention for generated code.

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 32 matching lines @@
   // The pool pointer is not implemented on all architectures.
   static int SavedCallerPpSlotFromFp() {
     if (kSavedCallerPpSlotFromFp != kSavedCallerFpSlotFromFp) {
       return kSavedCallerPpSlotFromFp;
     }
     UNREACHABLE();
     return 0;
   }
 
   void set_pc(uword value) {
-    *reinterpret_cast<uword*>(sp_ + (kSavedPcSlotFromSp * kWordSize)) = value;
+    *reinterpret_cast<uword*>(sp() + (kSavedPcSlotFromSp * kWordSize)) = value;
+  }
+
+  void set_pc_marker(RawCode* code) {
+    *reinterpret_cast<RawCode**>(fp() + (kPcMarkerSlotFromFp * kWordSize)) =
+        code;
   }
 
   // Visit objects in the frame.
   virtual void VisitObjectPointers(ObjectPointerVisitor* visitor);
 
   const char* ToCString() const;
 
   // Check validity of a frame, used for assertion purposes.
   virtual bool IsValid() const;
 
@@ skipping 260 matching lines @@
   uword pc_;
   GrowableArray<DeoptInstr*> deopt_instructions_;
   ObjectPool& object_table_;
 
   DISALLOW_COPY_AND_ASSIGN(InlinedFunctionsIterator);
 };
 
 }  // namespace dart
 
 #endif  // VM_STACK_FRAME_H_