1 /*
2 * Copyright (c) 2001, 2018, 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 #include "precompiled.hpp"
26 #include "gc/parallel/immutableSpace.hpp"
27 #include "memory/iterator.inline.hpp"
28 #include "memory/universe.hpp"
29 #include "oops/oop.inline.hpp"
30 #include "utilities/macros.hpp"
31
initialize(MemRegion mr)32 void ImmutableSpace::initialize(MemRegion mr) {
33 HeapWord* bottom = mr.start();
34 HeapWord* end = mr.end();
35
36 assert(Universe::on_page_boundary(bottom) && Universe::on_page_boundary(end),
37 "invalid space boundaries");
38
39 _bottom = bottom;
40 _end = end;
41 }
42
oop_iterate(OopIterateClosure * cl)43 void ImmutableSpace::oop_iterate(OopIterateClosure* cl) {
44 HeapWord* obj_addr = bottom();
45 HeapWord* t = end();
46 // Could call objects iterate, but this is easier.
47 while (obj_addr < t) {
48 obj_addr += oop(obj_addr)->oop_iterate_size(cl);
49 }
50 }
51
object_iterate(ObjectClosure * cl)52 void ImmutableSpace::object_iterate(ObjectClosure* cl) {
53 HeapWord* p = bottom();
54 while (p < end()) {
55 cl->do_object(oop(p));
56 p += oop(p)->size();
57 }
58 }
59
60 #ifndef PRODUCT
61
print_short() const62 void ImmutableSpace::print_short() const {
63 tty->print(" space " SIZE_FORMAT "K, 100%% used", capacity_in_bytes() / K);
64 }
65
print() const66 void ImmutableSpace::print() const {
67 print_short();
68 tty->print_cr(" [" INTPTR_FORMAT_W(#-6) "," INTPTR_FORMAT_W(#-6) ")", p2i(bottom()), p2i(end()));
69 }
70
71 #endif
72
verify()73 void ImmutableSpace::verify() {
74 HeapWord* p = bottom();
75 HeapWord* t = end();
76 HeapWord* prev_p = NULL;
77 while (p < t) {
78 oopDesc::verify(oop(p));
79 prev_p = p;
80 p += oop(p)->size();
81 }
82 guarantee(p == end(), "end of last object must match end of space");
83 }
84