Introduce a special kind of frames for construct frames, e.g....

src/macro-assembler-ia32.h

 // Copyright 2006-2008 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 68 matching lines @@
   void PushRegistersFromMemory(RegList regs);
   void PopRegistersToMemory(RegList regs);
   void CopyRegistersFromStackToMemory(Register base,
                                       Register scratch,
                                       RegList regs);
 
 
   // ---------------------------------------------------------------------------
   // Activation frames
 
-  void EnterInternalFrame();
-  void LeaveInternalFrame();
+  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 EXIT or
   // EXIT_DEBUG. Expects the number of arguments in register eax and
   // sets up the number of arguments in register edi and the pointer
   // to the first argument in register esi.
   void EnterExitFrame(StackFrame::Type type);
 
   // Leave the current exit frame. Expects the return value in
   // register eax:edx (untouched) and the pointer to the first
   // argument in register esi.
@@ skipping 166 matching lines @@
   void InvokePrologue(const ParameterCount& expected,
                       const ParameterCount& actual,
                       Handle<Code> code_constant,
                       const Operand& code_operand,
                       Label* done,
                       InvokeFlag flag);
 
   // Get the code for the given builtin. Returns if able to resolve
   // the function in the 'resolved' flag.
   Handle<Code> ResolveBuiltin(Builtins::JavaScript id, bool* resolved);
+
+  // Activation support.
+  void EnterFrame(StackFrame::Type type);
+  void LeaveFrame(StackFrame::Type type);
 };
 
 
 // The code patcher is used to patch (typically) small parts of code e.g. for
 // debugging and other types of instrumentation. When using the code patcher
 // the exact number of bytes specified must be emitted. Is not legal to emit
 // relocation information. If any of these constraints are violated it causes
 // an assertion.
 class CodePatcher {
  public:
@@ skipping 23 matching lines @@
                                    Register index,
                                    ScaleFactor scale,
                                    int offset) {
   return Operand(object, index, scale, offset - kHeapObjectTag);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_MACRO_ASSEMBLER_IA32_H_