Cleanup the way the debugger stores live registers when entering at a break...

src/x64/macro-assembler-x64.h

 // Copyright 2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 114 matching lines @@
   // All registers are clobbered by the operation.
   void RecordWriteNonSmi(Register object,
                          int offset,
                          Register value,
                          Register scratch);
 
 #ifdef ENABLE_DEBUGGER_SUPPORT
   // ---------------------------------------------------------------------------
   // Debugger Support
 
-  void SaveRegistersToMemory(RegList regs);
-  void RestoreRegistersFromMemory(RegList regs);
-  void PushRegistersFromMemory(RegList regs);
-  void PopRegistersToMemory(RegList regs);
-  void CopyRegistersFromStackToMemory(Register base,
-                                      Register scratch,
-                                      RegList regs);
   void DebugBreak();
 #endif
 
   // ---------------------------------------------------------------------------
   // Stack limit support
 
   // Do simple test for stack overflow. This doesn't handle an overflow.
   void StackLimitCheck(Label* on_stack_limit_hit);
 
   // ---------------------------------------------------------------------------
   // Activation frames
 
   void EnterInternalFrame() { EnterFrame(StackFrame::INTERNAL); }
   void LeaveInternalFrame() { LeaveFrame(StackFrame::INTERNAL); }
 
   void EnterConstructFrame() { EnterFrame(StackFrame::CONSTRUCT); }
   void LeaveConstructFrame() { LeaveFrame(StackFrame::CONSTRUCT); }
 
   // Enter specific kind of exit frame; either in normal or
   // debug mode. Expects the number of arguments in register rax and
   // sets up the number of arguments in register rdi and the pointer
   // to the first argument in register rsi.
-  void EnterExitFrame(ExitFrame::Mode mode, int result_size = 1);
+  void EnterExitFrame(int result_size = 1);
 
-  void EnterApiExitFrame(ExitFrame::Mode mode,
-                         int stack_space,
+  void EnterApiExitFrame(int stack_space,
                          int argc,
                          int result_size = 1);
 
   // Leave the current exit frame. Expects/provides the return value in
   // register rax:rdx (untouched) and the pointer to the first
   // argument in register rsi.
-  void LeaveExitFrame(ExitFrame::Mode mode, int result_size = 1);
+  void LeaveExitFrame(int result_size = 1);
 
 
   // ---------------------------------------------------------------------------
   // JavaScript invokes
 
   // Invoke the JavaScript function code by either calling or jumping.
   void InvokeCode(Register code,
                   const ParameterCount& expected,
                   const ParameterCount& actual,
                   InvokeFlag flag);
@@ skipping 686 matching lines @@
                       const ParameterCount& actual,
                       Handle<Code> code_constant,
                       Register code_register,
                       Label* done,
                       InvokeFlag flag);
 
   // Activation support.
   void EnterFrame(StackFrame::Type type);
   void LeaveFrame(StackFrame::Type type);
 
-  void EnterExitFramePrologue(ExitFrame::Mode mode, bool save_rax);
-  void EnterExitFrameEpilogue(ExitFrame::Mode mode, int result_size, int argc);
+  void EnterExitFramePrologue(bool save_rax);
+  void EnterExitFrameEpilogue(int result_size, int argc);
 
   // Allocation support helpers.
   // Loads the top of new-space into the result register.
   // If flags contains RESULT_CONTAINS_TOP then result_end is valid and
   // already contains the top of new-space, and scratch is invalid.
   // Otherwise the address of the new-space top is loaded into scratch (if
   // scratch is valid), and the new-space top is loaded into result.
   void LoadAllocationTopHelper(Register result,
                                Register result_end,
                                Register scratch,
@@ skipping 67 matching lines @@
   }                                                                       \
   masm->
 #else
 #define ACCESS_MASM(masm) masm->
 #endif
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_X64_MACRO_ASSEMBLER_X64_H_