1
|
1 |
/*
|
|
2 |
* Copyright 2000-2006 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
|
|
20 |
* CA 95054 USA or visit www.sun.com if you need additional information or
|
|
21 |
* have any questions.
|
|
22 |
*
|
|
23 |
*/
|
|
24 |
|
|
25 |
inline void MarkSweep::_adjust_pointer(oop* p, bool isroot) {
|
|
26 |
oop obj = *p;
|
|
27 |
VALIDATE_MARK_SWEEP_ONLY(oop saved_new_pointer = NULL);
|
|
28 |
if (obj != NULL) {
|
|
29 |
oop new_pointer = oop(obj->mark()->decode_pointer());
|
|
30 |
assert(new_pointer != NULL || // is forwarding ptr?
|
|
31 |
obj->mark() == markOopDesc::prototype() || // not gc marked?
|
|
32 |
(UseBiasedLocking && obj->mark()->has_bias_pattern()) || // not gc marked?
|
|
33 |
obj->is_shared(), // never forwarded?
|
|
34 |
"should contain a forwarding pointer");
|
|
35 |
if (new_pointer != NULL) {
|
|
36 |
*p = new_pointer;
|
|
37 |
assert(Universe::heap()->is_in_reserved(new_pointer),
|
|
38 |
"should be in object space");
|
|
39 |
VALIDATE_MARK_SWEEP_ONLY(saved_new_pointer = new_pointer);
|
|
40 |
}
|
|
41 |
}
|
|
42 |
VALIDATE_MARK_SWEEP_ONLY(track_adjusted_pointer(p, saved_new_pointer, isroot));
|
|
43 |
}
|
|
44 |
|
|
45 |
inline void MarkSweep::mark_object(oop obj) {
|
|
46 |
|
|
47 |
#ifndef SERIALGC
|
|
48 |
if (UseParallelOldGC && VerifyParallelOldWithMarkSweep) {
|
|
49 |
assert(PSParallelCompact::mark_bitmap()->is_marked(obj),
|
|
50 |
"Should be marked in the marking bitmap");
|
|
51 |
}
|
|
52 |
#endif // SERIALGC
|
|
53 |
|
|
54 |
// some marks may contain information we need to preserve so we store them away
|
|
55 |
// and overwrite the mark. We'll restore it at the end of markSweep.
|
|
56 |
markOop mark = obj->mark();
|
|
57 |
obj->set_mark(markOopDesc::prototype()->set_marked());
|
|
58 |
|
|
59 |
if (mark->must_be_preserved(obj)) {
|
|
60 |
preserve_mark(obj, mark);
|
|
61 |
}
|
|
62 |
}
|