diff -r 9d6eb2757167 -r 6e8e0bf87bbe src/share/vm/runtime/vframe.cpp --- a/src/share/vm/runtime/vframe.cpp Wed Feb 11 18:56:26 2015 -0800 +++ b/src/share/vm/runtime/vframe.cpp Fri Feb 20 22:12:53 2015 -0500 @@ -1,5 +1,5 @@ /* - * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 1997, 2015, 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 @@ -189,6 +189,7 @@ if (monitor->eliminated() && is_compiled_frame()) { // Eliminated in compiled code if (monitor->owner_is_scalar_replaced()) { Klass* k = java_lang_Class::as_Klass(monitor->owner_klass()); + // format below for lockbits matches this one. st->print("\t- eliminated (a %s)", k->external_name()); } else { oop obj = monitor->owner(); @@ -206,9 +207,10 @@ // see if we have completed the lock or we are blocked trying to // acquire it - we can only be blocked if the monitor is inflated + markOop mark = NULL; const char *lock_state = "locked"; // assume we have the monitor locked if (!found_first_monitor && frame_count == 0) { - markOop mark = monitor->owner()->mark(); + mark = monitor->owner()->mark(); if (mark->has_monitor() && ( // we have marked ourself as pending on this monitor mark->monitor() == thread()->current_pending_monitor() || @@ -216,11 +218,19 @@ !mark->monitor()->is_entered(thread()) )) { lock_state = "waiting to lock"; + } else { + mark = NULL; // Disable printing below } } + print_locked_object_class_name(st, monitor->owner(), lock_state); + if (Verbose && mark != NULL) { + // match with format above, replacing "-" with " ". + st->print("\t lockbits="); + mark->print_on(st); + st->cr(); + } found_first_monitor = true; - print_locked_object_class_name(st, monitor->owner(), lock_state); } } } @@ -578,10 +588,15 @@ tty->print("( null )"); } else { monitor->owner()->print_value(); - tty->print("(" INTPTR_FORMAT ")", (address)monitor->owner()); + tty->print("(owner=" INTPTR_FORMAT ")", (address)monitor->owner()); } - if (monitor->eliminated() && is_compiled_frame()) - tty->print(" ( lock is eliminated )"); + if (monitor->eliminated()) { + if(is_compiled_frame()) { + tty->print(" ( lock is eliminated in compiled frame )"); + } else { + tty->print(" ( lock is eliminated, frame not compiled )"); + } + } tty->cr(); tty->print("\t "); monitor->lock()->print_on(tty);