jdk8-mips64-public/hotspot: src/share/vm/memory/iterator.cpp@749b1464aa81

     1 /*

     2  * Copyright (c) 1997, 2010, 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 #ifdef ASSERT

    30 bool OopClosure::_must_remember_klasses = false;

    31 #endif

    33 void ObjectToOopClosure::do_object(oop obj) {

    34   obj->oop_iterate(_cl);

    35 }

    37 void VoidClosure::do_void() {

    38   ShouldNotCallThis();

    39 }

    41 #ifdef ASSERT

    42 bool OopClosure::must_remember_klasses() {

    43   return _must_remember_klasses;

    44 }

    45 void OopClosure::set_must_remember_klasses(bool v) {

    46   _must_remember_klasses = v;

    47 }

    48 #endif

    51 MarkingCodeBlobClosure::MarkScope::MarkScope(bool activate)

    52   : _active(activate)

    53 {

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

    55 }

    57 MarkingCodeBlobClosure::MarkScope::~MarkScope() {

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

    59 }

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

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

    63   if (nm == NULL)  return;

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

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

    66     do_newly_marked_nmethod(nm);

    67   } else {

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

    69   }

    70 }

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

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

    74 }

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

    77   if (!_do_marking) {

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

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

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

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

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

    83     if (nm != NULL) {

    84       nm->oops_do(_cl);

    85     }

    86   } else {

    87     MarkingCodeBlobClosure::do_code_blob(cb);

    88   }

    89 }

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