Actually put debug information on stack when aborting.

src/debug.cc

 // Copyright 2012 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 878 matching lines @@
 void Debug::Iterate(ObjectVisitor* v) {
   v->VisitPointer(BitCast<Object**>(&(debug_break_return_)));
   v->VisitPointer(BitCast<Object**>(&(debug_break_slot_)));
 }
 
 
 void Debug::PutValuesOnStackAndDie(int start,
                                    Address c_entry_fp,
                                    Address last_fp,
                                    Address larger_fp,
+                                   Address last_in_fp,
+                                   Address last_out_fp,
                                    int count,
                                    int end) {
+  OS::PrintError("start:       %d\n", start);
+  OS::PrintError("c_entry_fp:  %p\n", static_cast<void*>(c_entry_fp));
+  OS::PrintError("last_fp:     %p\n", static_cast<void*>(last_fp));
+  OS::PrintError("larger_fp:   %p\n", static_cast<void*>(larger_fp));
+  OS::PrintError("last_in_fp:  %p\n", static_cast<void*>(last_in_fp));
+  OS::PrintError("last_out_fp: %p\n", static_cast<void*>(last_out_fp));
+  OS::PrintError("count:       %d\n", count);
+  OS::PrintError("end:         %d\n", end);
   OS::Abort();
 }
 
 
 Object* Debug::Break(Arguments args) {
   Heap* heap = isolate_->heap();
   HandleScope scope(isolate_);
   ASSERT(args.length() == 0);
 
   thread_local_.frame_drop_mode_ = FRAMES_UNTOUCHED;
@@ skipping 92 matching lines @@
       // - C entry FP at which to start stack crawl.
       // - FP of the frame at which we plan to stop stepping out (last FP).
       // - current FP that's larger than last FP.
       // - Counter for the number of steps to step out.
       if (it.done()) {
         // We crawled the entire stack, never reaching last_fp_.
         PutValuesOnStackAndDie(0xBEEEEEEE,
                                frame->fp(),
                                thread_local_.last_fp_,
                                NULL,
+                               thread_local_.step_into_fp_,
+                               thread_local_.step_out_fp_,
                                count,
                                0xFEEEEEEE);
       } else if (it.frame()->fp() != thread_local_.last_fp_) {
         // We crawled over last_fp_, without getting a match.
         PutValuesOnStackAndDie(0xBEEEEEEE,
                                frame->fp(),
                                thread_local_.last_fp_,
                                it.frame()->fp(),
+                               thread_local_.step_into_fp_,
+                               thread_local_.step_out_fp_,
                                count,
                                0xFEEEEEEE);
       }
 
       // If we found original frame
       if (it.frame()->fp() == thread_local_.last_fp_) {
         if (step_count > 1) {
           // Save old count and action to continue stepping after
           // StepOut
           thread_local_.queued_step_count_ = step_count - 1;
@@ skipping 2655 matching lines @@
     {
       Locker locker;
       Isolate::Current()->debugger()->CallMessageDispatchHandler();
     }
   }
 }
 
 #endif  // ENABLE_DEBUGGER_SUPPORT
 
 } }  // namespace v8::internal