Make CTX allocatable by the register allocator.

runtime/vm/debugger.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_DEBUGGER_H_
 #define VM_DEBUGGER_H_
 
 #include "include/dart_debugger_api.h"
 
 #include "vm/object.h"
@@ skipping 161 matching lines @@
 
   void VariableAt(intptr_t i,
                   String* name,
                   intptr_t* token_pos,
                   intptr_t* end_pos,
                   Instance* value);
 
   RawArray* GetLocalVariables();
   RawObject* GetReceiver();
 
-  RawContext* GetSavedEntryContext();
   RawContext* GetSavedCurrentContext();
 
   RawObject* Evaluate(const String& expr);
 
   void PrintToJSONObject(JSONObject* jsobj);
 
  private:
   void PrintContextMismatchError(const String& var_name,
                                  intptr_t ctx_slot,
                                  intptr_t frame_ctx_level,
                                  intptr_t var_ctx_level);
 
   intptr_t TryIndex();
   void GetPcDescriptors();
   void GetVarDescriptors();
   void GetDescIndices();
 
   RawObject* GetLocalVar(intptr_t slot_index);
   RawInstance* GetLocalInstanceVar(intptr_t slot_index);
-  RawContext* GetLocalContextVar(intptr_t slot_index);
 
   RawInstance* GetLocalVarValue(intptr_t slot_index);
   RawInstance* GetInstanceCallReceiver(intptr_t num_actual_args);
   RawObject* GetClosureObject(intptr_t num_acatual_args);
 
   uword pc_;
   uword fp_;
   uword sp_;
 
   // The anchor of the context chain for this function.
@@ skipping 261 matching lines @@
   CodeBreakpoint* GetCodeBreakpoint(uword breakpoint_address);
 
   void SyncBreakpoint(SourceBreakpoint* bpt);
 
   ActivationFrame* TopDartFrame() const;
   static ActivationFrame* CollectDartFrame(Isolate* isolate,
                                            uword pc,
                                            StackFrame* frame,
                                            const Code& code,
                                            const Array& deopt_frame,
-                                           intptr_t deopt_frame_offset,
-                                           ActivationFrame* callee_activation,
-                                           const Context& entry_ctx);
+                                           intptr_t deopt_frame_offset);
   static RawArray* DeoptimizeToArray(Isolate* isolate,
                                      StackFrame* frame,
                                      const Code& code);
   static DebuggerStackTrace* CollectStackTrace();
   void SignalBpResolved(SourceBreakpoint *bpt);
   void SignalPausedEvent(ActivationFrame* top_frame,
                          SourceBreakpoint* bpt);
 
   intptr_t nextId() { return next_id_++; }
 
@@ skipping 53 matching lines @@
 
   friend class Isolate;
   friend class SourceBreakpoint;
   DISALLOW_COPY_AND_ASSIGN(Debugger);
 };
 
 
 }  // namespace dart
 
 #endif  // VM_DEBUGGER_H_