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_implementation/parallelScavenge/cardTableExtension.hpp"
27 #include "gc_implementation/parallelScavenge/gcTaskManager.hpp"
28 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.hpp"
29 #include "gc_implementation/parallelScavenge/psPromotionManager.inline.hpp"
30 #include "gc_implementation/parallelScavenge/psScavenge.hpp"
31 #include "gc_implementation/parallelScavenge/psTasks.hpp"
32 #include "gc_implementation/parallelScavenge/psYoungGen.hpp"
33 #include "oops/oop.inline.hpp"
34 #include "runtime/prefetch.inline.hpp"
35
36 // Checks an individual oop for missing precise marks. Mark
37 // may be either dirty or newgen.
38 class CheckForUnmarkedOops : public OopClosure {
39 private:
40 PSYoungGen* _young_gen;
41 CardTableExtension* _card_table;
42 HeapWord* _unmarked_addr;
43 jbyte* _unmarked_card;
44
45 protected:
46 template <class T> void do_oop_work(T* p) {
47 oop obj = oopDesc::load_decode_heap_oop(p);
48 if (_young_gen->is_in_reserved(obj) &&
49 !_card_table->addr_is_marked_imprecise(p)) {
50 // Don't overwrite the first missing card mark
51 if (_unmarked_addr == NULL) {
52 _unmarked_addr = (HeapWord*)p;
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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/cardTableExtension.hpp"
27 #include "gc/parallel/gcTaskManager.hpp"
28 #include "gc/parallel/parallelScavengeHeap.hpp"
29 #include "gc/parallel/psPromotionManager.inline.hpp"
30 #include "gc/parallel/psScavenge.hpp"
31 #include "gc/parallel/psTasks.hpp"
32 #include "gc/parallel/psYoungGen.hpp"
33 #include "oops/oop.inline.hpp"
34 #include "runtime/prefetch.inline.hpp"
35
36 // Checks an individual oop for missing precise marks. Mark
37 // may be either dirty or newgen.
38 class CheckForUnmarkedOops : public OopClosure {
39 private:
40 PSYoungGen* _young_gen;
41 CardTableExtension* _card_table;
42 HeapWord* _unmarked_addr;
43 jbyte* _unmarked_card;
44
45 protected:
46 template <class T> void do_oop_work(T* p) {
47 oop obj = oopDesc::load_decode_heap_oop(p);
48 if (_young_gen->is_in_reserved(obj) &&
49 !_card_table->addr_is_marked_imprecise(p)) {
50 // Don't overwrite the first missing card mark
51 if (_unmarked_addr == NULL) {
52 _unmarked_addr = (HeapWord*)p;
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