1 /*
2 * Copyright (c) 2001, 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 *
25 #include "precompiled.hpp"
26 #include "memory/allocation.inline.hpp"
27 #include "memory/cardTableRS.hpp"
28 #include "memory/genCollectedHeap.hpp"
29 #include "memory/generation.hpp"
30 #include "memory/space.inline.hpp"
31 #include "oops/oop.inline.hpp"
32 #include "runtime/atomic.inline.hpp"
33 #include "runtime/java.hpp"
34 #include "runtime/os.hpp"
35 #include "utilities/macros.hpp"
36
37 CardTableRS::CardTableRS(MemRegion whole_heap) :
38 GenRemSet(),
39 _cur_youngergen_card_val(youngergenP1_card)
40 {
41 guarantee(Universe::heap()->kind() == CollectedHeap::GenCollectedHeap, "sanity");
42 _ct_bs = new CardTableModRefBSForCTRS(whole_heap);
43 _ct_bs->initialize();
44 set_bs(_ct_bs);
45 _last_cur_val_in_gen = NEW_C_HEAP_ARRAY3(jbyte, GenCollectedHeap::max_gens + 1,
46 mtGC, CURRENT_PC, AllocFailStrategy::RETURN_NULL);
47 if (_last_cur_val_in_gen == NULL) {
48 vm_exit_during_initialization("Could not create last_cur_val_in_gen array.");
49 }
50 for (int i = 0; i < GenCollectedHeap::max_gens + 1; i++) {
51 _last_cur_val_in_gen[i] = clean_card_val();
52 }
53 _ct_bs->set_CTRS(this);
54 }
55
56 CardTableRS::~CardTableRS() {
57 if (_ct_bs) {
58 delete _ct_bs;
59 _ct_bs = NULL;
60 }
61 if (_last_cur_val_in_gen) {
62 FREE_C_HEAP_ARRAY(jbyte, _last_cur_val_in_gen);
63 }
64 }
65
66 void CardTableRS::resize_covered_region(MemRegion new_region) {
67 _ct_bs->resize_covered_region(new_region);
68 }
69
70 jbyte CardTableRS::find_unused_youngergenP_card_value() {
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1 /*
2 * Copyright (c) 2001, 2015, 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 *
25 #include "precompiled.hpp"
26 #include "memory/allocation.inline.hpp"
27 #include "memory/cardTableRS.hpp"
28 #include "memory/genCollectedHeap.hpp"
29 #include "memory/generation.hpp"
30 #include "memory/space.inline.hpp"
31 #include "oops/oop.inline.hpp"
32 #include "runtime/atomic.inline.hpp"
33 #include "runtime/java.hpp"
34 #include "runtime/os.hpp"
35 #include "utilities/macros.hpp"
36
37 CardTableRS::CardTableRS(MemRegion whole_heap) :
38 GenRemSet(),
39 _cur_youngergen_card_val(youngergenP1_card)
40 {
41 guarantee(Universe::heap()->kind() == CollectedHeap::GenCollectedHeap, "sanity");
42 _ct_bs = new CardTableModRefBSForCTRS(whole_heap);
43 _ct_bs->initialize();
44 set_bs(_ct_bs);
45 // max_gens is really GenCollectedHeap::heap()->gen_policy()->number_of_generations()
46 // (which is always 2, young & old), but GenCollectedHeap has not been initialized yet.
47 uint max_gens = 2;
48 _last_cur_val_in_gen = NEW_C_HEAP_ARRAY3(jbyte, max_gens + 1,
49 mtGC, CURRENT_PC, AllocFailStrategy::RETURN_NULL);
50 if (_last_cur_val_in_gen == NULL) {
51 vm_exit_during_initialization("Could not create last_cur_val_in_gen array.");
52 }
53 for (uint i = 0; i < max_gens + 1; i++) {
54 _last_cur_val_in_gen[i] = clean_card_val();
55 }
56 _ct_bs->set_CTRS(this);
57 }
58
59 CardTableRS::~CardTableRS() {
60 if (_ct_bs) {
61 delete _ct_bs;
62 _ct_bs = NULL;
63 }
64 if (_last_cur_val_in_gen) {
65 FREE_C_HEAP_ARRAY(jbyte, _last_cur_val_in_gen);
66 }
67 }
68
69 void CardTableRS::resize_covered_region(MemRegion new_region) {
70 _ct_bs->resize_covered_region(new_region);
71 }
72
73 jbyte CardTableRS::find_unused_youngergenP_card_value() {
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