diff -r 3fc49366dc15 -r 01a2b863cc61 hotspot/src/share/vm/runtime/deoptimization.cpp
--- a/hotspot/src/share/vm/runtime/deoptimization.cpp	Fri Oct 05 13:37:08 2012 -0700
+++ b/hotspot/src/share/vm/runtime/deoptimization.cpp	Fri Oct 05 18:57:10 2012 -0700
@@ -233,6 +233,7 @@
         return_value = Handle(thread, result);
         assert(Universe::heap()->is_in_or_null(result), "must be heap pointer");
         if (TraceDeoptimization) {
+          ttyLocker ttyl;
           tty->print_cr("SAVED OOP RESULT " INTPTR_FORMAT " in thread " INTPTR_FORMAT, result, thread);
         }
       }
@@ -493,6 +494,7 @@
 
   if (array->frames() > 1) {
     if (VerifyStack && TraceDeoptimization) {
+      ttyLocker ttyl;
       tty->print_cr("Deoptimizing method containing inlining");
     }
   }
@@ -573,6 +575,7 @@
 
 #ifndef PRODUCT
   if (TraceDeoptimization) {
+    ttyLocker ttyl;
     tty->print_cr("DEOPT UNPACKING thread " INTPTR_FORMAT " vframeArray " INTPTR_FORMAT " mode %d", thread, array, exec_mode);
   }
 #endif
@@ -1322,9 +1325,9 @@
       if (TraceDeoptimization) {  // make noise on the tty
         tty->print("Uncommon trap occurred in");
         nm->method()->print_short_name(tty);
-        tty->print(" (@" INTPTR_FORMAT ") thread=%d reason=%s action=%s unloaded_class_index=%d",
+        tty->print(" (@" INTPTR_FORMAT ") thread=" UINTX_FORMAT " reason=%s action=%s unloaded_class_index=%d",
                    fr.pc(),
-                   (int) os::current_thread_id(),
+                   os::current_thread_id(),
                    trap_reason_name(reason),
                    trap_action_name(action),
                    unloaded_class_index);