10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
11 * version 2 for more details (a copy is included in the LICENSE file that
12 * accompanied this code).
13 *
14 * You should have received a copy of the GNU General Public License version
15 * 2 along with this work; if not, write to the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
17 *
18 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
19 * or visit www.oracle.com if you need additional information or have any
20 * questions.
21 *
22 */
23
24 #include "precompiled.hpp"
25
26 #include "gc/shenandoah/shenandoahHeap.hpp"
27 #include "gc/shenandoah/shenandoahUtils.hpp"
28 #include "gc/shenandoah/shenandoahEvacOOMHandler.hpp"
29 #include "gc/shenandoah/shenandoahThreadLocalData.hpp"
30 #include "runtime/orderAccess.hpp"
31 #include "runtime/os.hpp"
32 #include "runtime/thread.hpp"
33
34 const jint ShenandoahEvacOOMHandler::OOM_MARKER_MASK = 0x80000000;
35
36 ShenandoahEvacOOMHandler::ShenandoahEvacOOMHandler() :
37 _threads_in_evac(0) {
38 }
39
40 void ShenandoahEvacOOMHandler::wait_for_no_evac_threads() {
41 while ((Atomic::load_acquire(&_threads_in_evac) & ~OOM_MARKER_MASK) != 0) {
42 os::naked_short_sleep(1);
43 }
44 // At this point we are sure that no threads can evacuate anything. Raise
45 // the thread-local oom_during_evac flag to indicate that any attempt
46 // to evacuate should simply return the forwarding pointer instead (which is safe now).
47 ShenandoahThreadLocalData::set_oom_during_evac(Thread::current(), true);
48 }
49
50 void ShenandoahEvacOOMHandler::enter_evacuation() {
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10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
11 * version 2 for more details (a copy is included in the LICENSE file that
12 * accompanied this code).
13 *
14 * You should have received a copy of the GNU General Public License version
15 * 2 along with this work; if not, write to the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
17 *
18 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
19 * or visit www.oracle.com if you need additional information or have any
20 * questions.
21 *
22 */
23
24 #include "precompiled.hpp"
25
26 #include "gc/shenandoah/shenandoahHeap.hpp"
27 #include "gc/shenandoah/shenandoahUtils.hpp"
28 #include "gc/shenandoah/shenandoahEvacOOMHandler.hpp"
29 #include "gc/shenandoah/shenandoahThreadLocalData.hpp"
30 #include "runtime/atomic.hpp"
31 #include "runtime/os.hpp"
32 #include "runtime/thread.hpp"
33
34 const jint ShenandoahEvacOOMHandler::OOM_MARKER_MASK = 0x80000000;
35
36 ShenandoahEvacOOMHandler::ShenandoahEvacOOMHandler() :
37 _threads_in_evac(0) {
38 }
39
40 void ShenandoahEvacOOMHandler::wait_for_no_evac_threads() {
41 while ((Atomic::load_acquire(&_threads_in_evac) & ~OOM_MARKER_MASK) != 0) {
42 os::naked_short_sleep(1);
43 }
44 // At this point we are sure that no threads can evacuate anything. Raise
45 // the thread-local oom_during_evac flag to indicate that any attempt
46 // to evacuate should simply return the forwarding pointer instead (which is safe now).
47 ShenandoahThreadLocalData::set_oom_during_evac(Thread::current(), true);
48 }
49
50 void ShenandoahEvacOOMHandler::enter_evacuation() {
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