jdk8-mips64-public/hotspot: src/share/vm/memory/iterator.cpp@3fadc0e8cffe

8000988: VM deadlock when running btree006 on windows-i586
Reviewed-by: johnc, jcoomes, ysr

     1 /*

     2  * Copyright (c) 1997, 2012, 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  */

    25 #include "precompiled.hpp"

    26 #include "memory/iterator.hpp"

    27 #include "oops/oop.inline.hpp"

    29 void KlassToOopClosure::do_klass(Klass* k) {

    30   k->oops_do(_oop_closure);

    31 }

    33 void ObjectToOopClosure::do_object(oop obj) {

    34   obj->oop_iterate(_cl);

    35 }

    37 void VoidClosure::do_void() {

    38   ShouldNotCallThis();

    39 }

    41 MarkingCodeBlobClosure::MarkScope::MarkScope(bool activate)

    42   : _active(activate)

    43 {

    44   if (_active)  nmethod::oops_do_marking_prologue();

    45 }

    47 MarkingCodeBlobClosure::MarkScope::~MarkScope() {

    48   if (_active)  nmethod::oops_do_marking_epilogue();

    49 }

    51 void MarkingCodeBlobClosure::do_code_blob(CodeBlob* cb) {

    52   nmethod* nm = cb->as_nmethod_or_null();

    53   if (nm == NULL)  return;

    54   if (!nm->test_set_oops_do_mark()) {

    55     NOT_PRODUCT(if (TraceScavenge)  nm->print_on(tty, "oops_do, 1st visit\n"));

    56     do_newly_marked_nmethod(nm);

    57   } else {

    58     NOT_PRODUCT(if (TraceScavenge)  nm->print_on(tty, "oops_do, skipped on 2nd visit\n"));

    59   }

    60 }

    62 void CodeBlobToOopClosure::do_newly_marked_nmethod(nmethod* nm) {

    63   nm->oops_do(_cl, /*do_strong_roots_only=*/ true);

    64 }

    66 void CodeBlobToOopClosure::do_code_blob(CodeBlob* cb) {

    67   if (!_do_marking) {

    68     nmethod* nm = cb->as_nmethod_or_null();

    69     NOT_PRODUCT(if (TraceScavenge && Verbose && nm != NULL)  nm->print_on(tty, "oops_do, unmarked visit\n"));

    70     // This assert won't work, since there are lots of mini-passes

    71     // (mostly in debug mode) that co-exist with marking phases.

    72     //assert(!(cb->is_nmethod() && ((nmethod*)cb)->test_oops_do_mark()), "found marked nmethod during mark-free phase");

    73     if (nm != NULL) {

    74       nm->oops_do(_cl);

    75     }

    76   } else {

    77     MarkingCodeBlobClosure::do_code_blob(cb);

    78   }

    79 }

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