diff -r caf5eb7dd4a7 -r 882756847a04 hotspot/src/share/vm/runtime/os.cpp
--- a/hotspot/src/share/vm/runtime/os.cpp	Fri Aug 31 16:39:35 2012 -0700
+++ b/hotspot/src/share/vm/runtime/os.cpp	Sat Sep 01 13:25:18 2012 -0400
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -271,7 +271,7 @@
       default: {
         // Dispatch the signal to java
         HandleMark hm(THREAD);
-        klassOop k = SystemDictionary::resolve_or_null(vmSymbols::sun_misc_Signal(), THREAD);
+        Klass* k = SystemDictionary::resolve_or_null(vmSymbols::sun_misc_Signal(), THREAD);
         KlassHandle klass (THREAD, k);
         if (klass.not_null()) {
           JavaValue result(T_VOID);
@@ -294,7 +294,7 @@
             char klass_name[256];
             char tmp_sig_name[16];
             const char* sig_name = "UNKNOWN";
-            instanceKlass::cast(PENDING_EXCEPTION->klass())->
+            InstanceKlass::cast(PENDING_EXCEPTION->klass())->
               name()->as_klass_external_name(klass_name, 256);
             if (os::exception_name(sig, tmp_sig_name, 16) != NULL)
               sig_name = tmp_sig_name;
@@ -314,7 +314,7 @@
   if (!ReduceSignalUsage) {
     // Setup JavaThread for processing signals
     EXCEPTION_MARK;
-    klassOop k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(), true, CHECK);
+    Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(), true, CHECK);
     instanceKlassHandle klass (THREAD, k);
     instanceHandle thread_oop = klass->allocate_instance_handle(CHECK);
 
@@ -893,17 +893,6 @@
     if (print) {
       st->print_cr(INTPTR_FORMAT " is an oop", addr);
       oop(p)->print_on(st);
-      if (p != (HeapWord*)x && oop(p)->is_constMethod() &&
-          constMethodOop(p)->contains(addr)) {
-        Thread *thread = Thread::current();
-        HandleMark hm(thread);
-        methodHandle mh (thread, constMethodOop(p)->method());
-        if (!mh->is_native()) {
-          st->print_cr("bci_from(%p) = %d; print_codes():",
-                        addr, mh->bci_from(address(x)));
-          mh->print_codes_on(st);
-        }
-      }
       return;
     }
   } else {
@@ -958,6 +947,17 @@
     }
 
   }
+
+#ifndef PRODUCT
+  // Check if in metaspace.
+  if (ClassLoaderDataGraph::contains((address)addr)) {
+    // Use addr->print() from the debugger instead (not here)
+    st->print_cr(INTPTR_FORMAT
+                 " is pointing into metadata", addr);
+    return;
+  }
+#endif
+
   // Try an OS specific find
   if (os::find(addr, st)) {
     return;