1/*
2 * Copyright (c) 2007, 2017, 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#ifndef SHARE_VM_GC_CMS_CMSOOPCLOSURES_INLINE_HPP
26#define SHARE_VM_GC_CMS_CMSOOPCLOSURES_INLINE_HPP
27
28#include "gc/cms/cmsOopClosures.hpp"
29#include "gc/cms/concurrentMarkSweepGeneration.hpp"
30#include "gc/shared/taskqueue.inline.hpp"
31#include "oops/oop.inline.hpp"
32
33// MetadataAwareOopClosure and MetadataAwareOopsInGenClosure are duplicated,
34// until we get rid of OopsInGenClosure.
35
36inline void MetadataAwareOopsInGenClosure::do_klass_nv(Klass* k) {
37  ClassLoaderData* cld = k->class_loader_data();
38  do_cld_nv(cld);
39}
40inline void MetadataAwareOopsInGenClosure::do_klass(Klass* k) { do_klass_nv(k); }
41
42inline void MetadataAwareOopsInGenClosure::do_cld_nv(ClassLoaderData* cld) {
43  assert(_klass_closure._oop_closure == this, "Must be");
44
45  bool claim = true;  // Must claim the class loader data before processing.
46  cld->oops_do(_klass_closure._oop_closure, &_klass_closure, claim);
47}
48
49// Decode the oop and call do_oop on it.
50#define DO_OOP_WORK_IMPL(cls)                                 \
51  template <class T> void cls::do_oop_work(T* p) {            \
52    T heap_oop = oopDesc::load_heap_oop(p);                   \
53    if (!oopDesc::is_null(heap_oop)) {                        \
54      oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);  \
55      do_oop(obj);                                            \
56    }                                                         \
57  }
58
59#define DO_OOP_WORK_NV_IMPL(cls)                              \
60  DO_OOP_WORK_IMPL(cls)                                       \
61  void cls::do_oop_nv(oop* p)       { cls::do_oop_work(p); }  \
62  void cls::do_oop_nv(narrowOop* p) { cls::do_oop_work(p); }
63
64DO_OOP_WORK_IMPL(MarkRefsIntoClosure)
65DO_OOP_WORK_IMPL(ParMarkRefsIntoClosure)
66DO_OOP_WORK_IMPL(MarkRefsIntoVerifyClosure)
67DO_OOP_WORK_NV_IMPL(PushAndMarkClosure)
68DO_OOP_WORK_NV_IMPL(ParPushAndMarkClosure)
69DO_OOP_WORK_NV_IMPL(MarkRefsIntoAndScanClosure)
70DO_OOP_WORK_NV_IMPL(ParMarkRefsIntoAndScanClosure)
71
72// Trim our work_queue so its length is below max at return
73inline void ParMarkRefsIntoAndScanClosure::trim_queue(uint max) {
74  while (_work_queue->size() > max) {
75    oop newOop;
76    if (_work_queue->pop_local(newOop)) {
77      assert(oopDesc::is_oop(newOop), "Expected an oop");
78      assert(_bit_map->isMarked((HeapWord*)newOop),
79             "only grey objects on this stack");
80      // iterate over the oops in this oop, marking and pushing
81      // the ones in CMS heap (i.e. in _span).
82      newOop->oop_iterate(&_parPushAndMarkClosure);
83    }
84  }
85}
86
87DO_OOP_WORK_NV_IMPL(PushOrMarkClosure)
88DO_OOP_WORK_NV_IMPL(ParPushOrMarkClosure)
89DO_OOP_WORK_NV_IMPL(CMSKeepAliveClosure)
90DO_OOP_WORK_NV_IMPL(CMSInnerParMarkAndPushClosure)
91DO_OOP_WORK_IMPL(CMSParKeepAliveClosure)
92
93#endif // SHARE_VM_GC_CMS_CMSOOPCLOSURES_INLINE_HPP
94