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

src/frames.cc

 // 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 293 matching lines @@
 
 
 int JavaScriptFrame::ComputeParametersCount() const {
   Address base  = pp() + JavaScriptFrameConstants::kReceiverOffset;
   Address limit = fp() + JavaScriptFrameConstants::kSavedRegistersOffset;
   return (base - limit) / kPointerSize;
 }
 
 
 bool JavaScriptFrame::IsConstructor() const {
-  Address pc = has_adapted_arguments()
-      ? Memory::Address_at(ComputePCAddress(caller_fp()))
-      : caller_pc();
-  return IsConstructTrampolineFrame(pc);
+  Address fp = caller_fp();
+  if (has_adapted_arguments()) {
+    // Skip the arguments adaptor frame and look at the real caller.
+    fp = Memory::Address_at(fp + StandardFrameConstants::kCallerFPOffset);
+  }
+  return IsConstructFrame(fp);
 }
 
 
 Code* ArgumentsAdaptorFrame::FindCode() const {
   return Builtins::builtin(Builtins::ArgumentsAdaptorTrampoline);
 }
 
 
 Code* InternalFrame::FindCode() const {
   const int offset = InternalFrameConstants::kCodeOffset;
@@ skipping 250 matching lines @@
         reg_code[i++] = r;
 
     ASSERT(i == kNumJSCallerSaved);
   }
   ASSERT(0 <= n && n < kNumJSCallerSaved);
   return reg_code[n];
 }
 
 
 } }  // namespace v8::internal