1 /*

     2  * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  *

    23  */

    24 

    25 #include "precompiled.hpp"

    26 #include "oops/markOop.hpp"

    27 #include "runtime/thread.inline.hpp"

    28 #include "runtime/objectMonitor.hpp"

    29 

    30 void markWord::print_on(outputStream* st) const {

    31   if (is_marked()) {  // last bits = 11

    32     st->print(" marked(" INTPTR_FORMAT ")", value());

    33   } else if (has_monitor()) {  // last bits = 10

    34     // have to check has_monitor() before is_locked()

    35     st->print(" monitor(" INTPTR_FORMAT ")=", value());

    36     ObjectMonitor* mon = monitor();

    37     if (mon == NULL) {

    38       st->print("NULL (this should never be seen!)");

    39     } else {

    40       mon->print_on(st);

    41     }

    42   } else if (is_locked()) {  // last bits != 01 => 00

    43     // thin locked

    44     st->print(" locked(" INTPTR_FORMAT ")", value());

    45   } else {

    46     st->print(" mark(");

    47     // Biased bit is 3rd rightmost bit

    48     if (is_neutral()) {   // last bits = 001

    49       st->print("is_neutral");

    50       if (has_no_hash()) {

    51         st->print(" no_hash");

    52       } else {

    53         st->print(" hash=" INTPTR_FORMAT, hash());

    54       }

    55     } else if (has_bias_pattern()) {  // last bits = 101

    56       st->print("is_biased");

    57       JavaThread* jt = biased_locker();

    58       st->print(" biased_locker=" INTPTR_FORMAT " epoch=%d", p2i(jt), bias_epoch());

    59     } else {

    60       st->print("??");

    61     }

    62     st->print(" age=%d)", age());

    63   }

    64 }