Change the IA32 stack handler layout so that the handler address does...

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 31 matching lines @@
 class StackHandlerIterator BASE_EMBEDDED {
  public:
   StackHandlerIterator(const StackFrame* frame, StackHandler* handler)
       : limit_(frame->fp()), handler_(handler) {
     // Make sure the handler has already been unwound to this frame.
     ASSERT(frame->sp() <= handler->address());
   }
 
   StackHandler* handler() const { return handler_; }
 
-  bool done() { return handler_->address() > limit_; }
+  bool done() {
+    return handler_ == NULL || handler_->address() > limit_;
+  }
   void Advance() {
     ASSERT(!done());
     handler_ = handler_->next();
   }
 
  private:
   const Address limit_;
   StackHandler* handler_;
 };
 
@@ skipping 669 matching lines @@
         reg_code[i++] = r;
 
     ASSERT(i == kNumJSCallerSaved);
   }
   ASSERT(0 <= n && n < kNumJSCallerSaved);
   return reg_code[n];
 }
 
 
 } }  // namespace v8::internal