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/g1/g1CardTable.hpp"
27 #include "gc/g1/g1CollectedHeap.inline.hpp"
28 #include "gc/shared/memset_with_concurrent_readers.hpp"
29 #include "logging/log.hpp"
30 #include "runtime/atomic.hpp"
31 #include "runtime/orderAccess.hpp"
32
33 void G1CardTable::g1_mark_as_young(const MemRegion& mr) {
34 CardValue *const first = byte_for(mr.start());
35 CardValue *const last = byte_after(mr.last());
36
37 memset_with_concurrent_readers(first, g1_young_gen, last - first);
38 }
39
40 #ifndef PRODUCT
41 void G1CardTable::verify_g1_young_region(MemRegion mr) {
42 verify_region(mr, g1_young_gen, true);
43 }
44 #endif
45
46 void G1CardTableChangedListener::on_commit(uint start_idx, size_t num_regions, bool zero_filled) {
47 // Default value for a clean card on the card table is -1. So we cannot take advantage of the zero_filled parameter.
48 MemRegion mr(G1CollectedHeap::heap()->bottom_addr_for_region(start_idx), num_regions * HeapRegion::GrainWords);
49 _card_table->clear(mr);
50 }
51
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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/g1/g1CardTable.hpp"
27 #include "gc/g1/g1CollectedHeap.inline.hpp"
28 #include "gc/shared/memset_with_concurrent_readers.hpp"
29 #include "logging/log.hpp"
30 #include "runtime/atomic.hpp"
31
32 void G1CardTable::g1_mark_as_young(const MemRegion& mr) {
33 CardValue *const first = byte_for(mr.start());
34 CardValue *const last = byte_after(mr.last());
35
36 memset_with_concurrent_readers(first, g1_young_gen, last - first);
37 }
38
39 #ifndef PRODUCT
40 void G1CardTable::verify_g1_young_region(MemRegion mr) {
41 verify_region(mr, g1_young_gen, true);
42 }
43 #endif
44
45 void G1CardTableChangedListener::on_commit(uint start_idx, size_t num_regions, bool zero_filled) {
46 // Default value for a clean card on the card table is -1. So we cannot take advantage of the zero_filled parameter.
47 MemRegion mr(G1CollectedHeap::heap()->bottom_addr_for_region(start_idx), num_regions * HeapRegion::GrainWords);
48 _card_table->clear(mr);
49 }
50
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