1 /*
2 * Copyright (c) 2000, 2013, 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_IMPLEMENTATION_SHARED_MARKSWEEP_INLINE_HPP
26 #define SHARE_VM_GC_IMPLEMENTATION_SHARED_MARKSWEEP_INLINE_HPP
27
28 #include "gc_implementation/shared/markSweep.hpp"
29 #include "gc_interface/collectedHeap.hpp"
30 #include "utilities/stack.inline.hpp"
31 #include "utilities/macros.hpp"
32 #if INCLUDE_ALL_GCS
33 #include "gc_implementation/parallelScavenge/psParallelCompact.hpp"
34 #endif // INCLUDE_ALL_GCS
35
36 inline void MarkSweep::mark_object(oop obj) {
37 // some marks may contain information we need to preserve so we store them away
38 // and overwrite the mark. We'll restore it at the end of markSweep.
39 markOop mark = obj->mark();
40 obj->set_mark(markOopDesc::prototype()->set_marked());
41
42 if (mark->must_be_preserved(obj)) {
43 preserve_mark(obj, mark);
44 }
45 }
46
47 inline void MarkSweep::follow_klass(Klass* klass) {
48 oop op = klass->klass_holder();
49 MarkSweep::mark_and_push(&op);
50 }
51
52 template <class T> inline void MarkSweep::follow_root(T* p) {
53 assert(!Universe::heap()->is_in_reserved(p),
54 "roots shouldn't be things within the heap");
55 T heap_oop = oopDesc::load_heap_oop(p);
56 if (!oopDesc::is_null(heap_oop)) {
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1 /*
2 * Copyright (c) 2000, 2014, 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_IMPLEMENTATION_SHARED_MARKSWEEP_INLINE_HPP
26 #define SHARE_VM_GC_IMPLEMENTATION_SHARED_MARKSWEEP_INLINE_HPP
27
28 #include "gc_implementation/shared/markSweep.hpp"
29 #include "gc_interface/collectedHeap.hpp"
30 #include "utilities/stack.inline.hpp"
31 #include "utilities/macros.hpp"
32 #if INCLUDE_ALL_GCS
33 #include "gc_implementation/g1/g1StringDedup.hpp"
34 #include "gc_implementation/parallelScavenge/psParallelCompact.hpp"
35 #endif // INCLUDE_ALL_GCS
36
37 inline void MarkSweep::mark_object(oop obj) {
38 #if INCLUDE_ALL_GCS
39 if (G1StringDedup::is_enabled()) {
40 // We must enqueue the object before it is marked
41 // as we otherwise can't read the object's age.
42 G1StringDedup::enqueue_from_mark(obj);
43 }
44 #endif
45 // some marks may contain information we need to preserve so we store them away
46 // and overwrite the mark. We'll restore it at the end of markSweep.
47 markOop mark = obj->mark();
48 obj->set_mark(markOopDesc::prototype()->set_marked());
49
50 if (mark->must_be_preserved(obj)) {
51 preserve_mark(obj, mark);
52 }
53 }
54
55 inline void MarkSweep::follow_klass(Klass* klass) {
56 oop op = klass->klass_holder();
57 MarkSweep::mark_and_push(&op);
58 }
59
60 template <class T> inline void MarkSweep::follow_root(T* p) {
61 assert(!Universe::heap()->is_in_reserved(p),
62 "roots shouldn't be things within the heap");
63 T heap_oop = oopDesc::load_heap_oop(p);
64 if (!oopDesc::is_null(heap_oop)) {
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