hotspot/src/share/vm/oops/markOop.cpp
author dcubed
Tue, 14 Jul 2015 09:33:20 -0700
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parent 31592 43f48e165466
child 33148 68fa8b6c4340
permissions -rw-r--r--
8130448: thread dump improvements, comment additions, new diagnostics inspired by 8077392 Reviewed-by: dholmes, coleenp
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/*
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 * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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#include "precompiled.hpp"
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#include "oops/markOop.hpp"
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#include "runtime/thread.inline.hpp"
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#include "runtime/objectMonitor.inline.hpp"
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PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
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void markOopDesc::print_on(outputStream* st) const {
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  if (is_marked()) {
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    st->print(" marked(" INTPTR_FORMAT ")", value());
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  } else if (has_monitor()) {
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    // have to check has_monitor() before is_locked()
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    st->print(" monitor(" INTPTR_FORMAT ")=", value());
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    ObjectMonitor* mon = monitor();
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    if (mon == NULL) {
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      st->print("NULL (this should never be seen!)");
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    } else {
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      st->print("{count=" INTPTR_FORMAT ",waiters=" INTPTR_FORMAT
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                ",recursions=" INTPTR_FORMAT ",owner=" INTPTR_FORMAT "}",
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                mon->count(), mon->waiters(), mon->recursions(),
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                p2i(mon->owner()));
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    }
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  } else if (is_locked()) {
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    st->print(" locked(" INTPTR_FORMAT ")->", value());
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    if (is_neutral()) {
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      st->print("is_neutral");
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      if (has_no_hash()) {
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        st->print(" no_hash");
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      } else {
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        st->print(" hash=" INTPTR_FORMAT, hash());
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      }
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      st->print(" age=%d", age());
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    } else if (has_bias_pattern()) {
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      st->print("is_biased");
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      JavaThread* jt = biased_locker();
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      st->print(" biased_locker=" INTPTR_FORMAT, p2i(jt));
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    } else {
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      st->print("??");
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    }
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  } else {
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    assert(is_unlocked() || has_bias_pattern(), "just checking");
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    st->print("mark(");
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    if (has_bias_pattern()) st->print("biased,");
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    st->print("hash %#lx,", hash());
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    st->print("age %d)", age());
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  }
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}