Intercept a crash, put debug information onto the stack and then abort gracefully.

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 874 matching lines @@
   Debug::set_interrupts_pending(PREEMPT);
 }
 
 
 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,
+                                   int count,
+                                   int 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;
 
   // Get the top-most JavaScript frame.
   JavaScriptFrameIterator it(isolate_);
   JavaScriptFrame* frame = it.frame();
@@ skipping 72 matching lines @@
     // ClearStepping.
     StepAction step_action = thread_local_.last_step_action_;
     int step_count = thread_local_.step_count_;
 
     // If StepNext goes deeper in code, StepOut until original frame
     // and keep step count queued up in the meantime.
     if (step_action == StepNext && frame->fp() < thread_local_.last_fp_) {
       // Count frames until target frame
       int count = 0;
       JavaScriptFrameIterator it(isolate_);
-      while (!it.done() && it.frame()->fp() != thread_local_.last_fp_) {
+      while (!it.done() && it.frame()->fp() < thread_local_.last_fp_) {
         count++;
         it.Advance();
       }
 
+      // Catch the cases that would lead to crashes and capture
+      // - 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,
+                               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(),
+                               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;
         }
 
         // Set up for StepOut to reach target frame
         step_action = StepOut;
@@ skipping 2587 matching lines @@
     {
       Locker locker;
       Isolate::Current()->debugger()->CallMessageDispatchHandler();
     }
   }
 }
 
 #endif  // ENABLE_DEBUGGER_SUPPORT
 
 } }  // namespace v8::internal