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