342
|
1 /*
|
|
2 * Copyright 2001-2007 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 size_t G1RemSet::n_workers() {
|
|
26 if (_g1->workers() != NULL) {
|
|
27 return _g1->workers()->total_workers();
|
|
28 } else {
|
|
29 return 1;
|
|
30 }
|
|
31 }
|
|
32
|
|
33 inline void HRInto_G1RemSet::write_ref_nv(HeapRegion* from, oop* p) {
|
|
34 oop obj = *p;
|
|
35 assert(from != NULL && from->is_in_reserved(p),
|
|
36 "p is not in a from");
|
|
37 HeapRegion* to = _g1->heap_region_containing(obj);
|
|
38 if (from != to && to != NULL) {
|
|
39 if (!to->popular() && !from->is_survivor()) {
|
|
40 #if G1_REM_SET_LOGGING
|
|
41 gclog_or_tty->print_cr("Adding " PTR_FORMAT " (" PTR_FORMAT ") to RS"
|
|
42 " for region [" PTR_FORMAT ", " PTR_FORMAT ")",
|
|
43 p, obj,
|
|
44 to->bottom(), to->end());
|
|
45 #endif
|
|
46 assert(to->rem_set() != NULL, "Need per-region 'into' remsets.");
|
|
47 if (to->rem_set()->add_reference(p)) {
|
|
48 _g1->schedule_popular_region_evac(to);
|
|
49 }
|
|
50 }
|
|
51 }
|
|
52 }
|
|
53
|
|
54 inline void HRInto_G1RemSet::write_ref(HeapRegion* from, oop* p) {
|
|
55 write_ref_nv(from, p);
|
|
56 }
|
|
57
|
|
58 inline bool HRInto_G1RemSet::self_forwarded(oop obj) {
|
|
59 bool result = (obj->is_forwarded() && (obj->forwardee()== obj));
|
|
60 return result;
|
|
61 }
|
|
62
|
|
63 inline void HRInto_G1RemSet::par_write_ref(HeapRegion* from, oop* p, int tid) {
|
|
64 oop obj = *p;
|
|
65 #ifdef ASSERT
|
|
66 // can't do because of races
|
|
67 // assert(obj == NULL || obj->is_oop(), "expected an oop");
|
|
68
|
|
69 // Do the safe subset of is_oop
|
|
70 if (obj != NULL) {
|
|
71 #ifdef CHECK_UNHANDLED_OOPS
|
|
72 oopDesc* o = obj.obj();
|
|
73 #else
|
|
74 oopDesc* o = obj;
|
|
75 #endif // CHECK_UNHANDLED_OOPS
|
|
76 assert((intptr_t)o % MinObjAlignmentInBytes == 0, "not oop aligned");
|
|
77 assert(Universe::heap()->is_in_reserved(obj), "must be in heap");
|
|
78 }
|
|
79 #endif // ASSERT
|
|
80 assert(from == NULL || from->is_in_reserved(p),
|
|
81 "p is not in from");
|
|
82 HeapRegion* to = _g1->heap_region_containing(obj);
|
|
83 // The test below could be optimized by applying a bit op to to and from.
|
|
84 if (to != NULL && from != NULL && from != to) {
|
|
85 if (!to->popular() && !from->is_survivor()) {
|
|
86 #if G1_REM_SET_LOGGING
|
|
87 gclog_or_tty->print_cr("Adding " PTR_FORMAT " (" PTR_FORMAT ") to RS"
|
|
88 " for region [" PTR_FORMAT ", " PTR_FORMAT ")",
|
|
89 p, obj,
|
|
90 to->bottom(), to->end());
|
|
91 #endif
|
|
92 assert(to->rem_set() != NULL, "Need per-region 'into' remsets.");
|
|
93 if (to->rem_set()->add_reference(p, tid)) {
|
|
94 _g1->schedule_popular_region_evac(to);
|
|
95 }
|
|
96 }
|
|
97 // There is a tricky infinite loop if we keep pushing
|
|
98 // self forwarding pointers onto our _new_refs list.
|
|
99 if (_par_traversal_in_progress &&
|
|
100 to->in_collection_set() && !self_forwarded(obj)) {
|
|
101 _new_refs[tid]->push(p);
|
|
102 }
|
|
103 }
|
|
104 }
|