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/shared/preservedMarks.inline.hpp"
27 #include "gc/shared/workgroup.hpp"
28 #include "memory/allocation.inline.hpp"
29 #include "memory/resourceArea.hpp"
30 #include "oops/oop.inline.hpp"
31 #include "runtime/atomic.hpp"
32 #include "utilities/macros.hpp"
33
34 void PreservedMarks::restore() {
35 while (!_stack.is_empty()) {
36 const OopAndMarkWord elem = _stack.pop();
37 elem.set_mark();
38 }
39 assert_empty();
40 }
41
42 void PreservedMarks::adjust_during_full_gc() {
43 StackIterator<OopAndMarkWord, mtGC> iter(_stack);
44 while (!iter.is_empty()) {
45 OopAndMarkWord* elem = iter.next_addr();
46
47 oop obj = elem->get_oop();
48 if (obj->is_forwarded()) {
49 elem->set_oop(obj->forwardee());
50 }
51 }
52 }
53
54 void PreservedMarks::restore_and_increment(volatile size_t* const total_size_addr) {
55 const size_t stack_size = size();
56 restore();
57 // Only do the atomic add if the size is > 0.
58 if (stack_size > 0) {
59 Atomic::add(total_size_addr, stack_size);
60 }
61 }
62
63 #ifndef PRODUCT
64 void PreservedMarks::assert_empty() {
65 assert(_stack.is_empty(), "stack expected to be empty, size = " SIZE_FORMAT,
66 _stack.size());
67 assert(_stack.cache_size() == 0,
68 "stack expected to have no cached segments, cache size = " SIZE_FORMAT,
69 _stack.cache_size());
70 }
71 #endif // ndef PRODUCT
72
73 void RemoveForwardedPointerClosure::do_object(oop obj) {
|
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/shared/preservedMarks.inline.hpp"
27 #include "gc/shared/slidingForwarding.inline.hpp"
28 #include "gc/shared/workgroup.hpp"
29 #include "memory/allocation.inline.hpp"
30 #include "memory/resourceArea.hpp"
31 #include "oops/oop.inline.hpp"
32 #include "runtime/atomic.hpp"
33 #include "utilities/macros.hpp"
34
35 void PreservedMarks::restore() {
36 while (!_stack.is_empty()) {
37 const OopAndMarkWord elem = _stack.pop();
38 elem.set_mark();
39 }
40 assert_empty();
41 }
42
43 template <bool ALT_FWD>
44 void PreservedMarks::adjust_during_full_gc_impl() {
45 StackIterator<OopAndMarkWord, mtGC> iter(_stack);
46 while (!iter.is_empty()) {
47 OopAndMarkWord* elem = iter.next_addr();
48
49 oop obj = elem->get_oop();
50 if (SlidingForwarding::is_forwarded(obj)) {
51 elem->set_oop(SlidingForwarding::forwardee<ALT_FWD>(obj));
52 }
53 }
54 }
55
56 void PreservedMarks::adjust_during_full_gc() {
57 if (UseAltGCForwarding) {
58 adjust_during_full_gc_impl<true>();
59 } else {
60 adjust_during_full_gc_impl<false>();
61 }
62 }
63
64 void PreservedMarks::restore_and_increment(volatile size_t* const total_size_addr) {
65 const size_t stack_size = size();
66 restore();
67 // Only do the atomic add if the size is > 0.
68 if (stack_size > 0) {
69 Atomic::add(total_size_addr, stack_size);
70 }
71 }
72
73 #ifndef PRODUCT
74 void PreservedMarks::assert_empty() {
75 assert(_stack.is_empty(), "stack expected to be empty, size = " SIZE_FORMAT,
76 _stack.size());
77 assert(_stack.cache_size() == 0,
78 "stack expected to have no cached segments, cache size = " SIZE_FORMAT,
79 _stack.cache_size());
80 }
81 #endif // ndef PRODUCT
82
83 void RemoveForwardedPointerClosure::do_object(oop obj) {
|