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/cms/concurrentMarkSweepGeneration.inline.hpp" 27 #include "gc/cms/concurrentMarkSweepThread.hpp" 28 #include "gc/cms/vmCMSOperations.hpp" 29 #include "gc/shared/gcLocker.inline.hpp" 30 #include "gc/shared/gcTimer.hpp" 31 #include "gc/shared/gcTraceTime.hpp" 32 #include "gc/shared/isGCActiveMark.hpp" 33 #include "runtime/interfaceSupport.hpp" 34 #include "runtime/os.hpp" 35 #include "utilities/dtrace.hpp" 36 37 ////////////////////////////////////////////////////////// 38 // Methods in abstract class VM_CMS_Operation 39 ////////////////////////////////////////////////////////// 40 void VM_CMS_Operation::acquire_pending_list_lock() { 41 // The caller may block while communicating 42 // with the SLT thread in order to acquire/release the PLL. 43 SurrogateLockerThread* slt = ConcurrentMarkSweepThread::slt(); 44 if (slt != NULL) { 45 slt->manipulatePLL(SurrogateLockerThread::acquirePLL); 46 } else { 47 SurrogateLockerThread::report_missing_slt(); 48 } 49 } 50 51 void VM_CMS_Operation::release_and_notify_pending_list_lock() { 52 // The caller may block while communicating 53 // with the SLT thread in order to acquire/release the PLL. 54 ConcurrentMarkSweepThread::slt()-> 55 manipulatePLL(SurrogateLockerThread::releaseAndNotifyPLL); 56 } 57 58 void VM_CMS_Operation::verify_before_gc() { 59 if (VerifyBeforeGC && 60 GenCollectedHeap::heap()->total_collections() >= VerifyGCStartAt) { 61 GCTraceTime tm("Verify Before", false, false, _collector->_gc_timer_cm); 62 HandleMark hm; 63 FreelistLocker x(_collector); 64 MutexLockerEx y(_collector->bitMapLock(), Mutex::_no_safepoint_check_flag); 65 GenCollectedHeap::heap()->prepare_for_verify(); 66 Universe::verify(); 67 } 68 } 69 70 void VM_CMS_Operation::verify_after_gc() { 71 if (VerifyAfterGC && 72 GenCollectedHeap::heap()->total_collections() >= VerifyGCStartAt) { 73 GCTraceTime tm("Verify After", false, false, _collector->_gc_timer_cm); 74 HandleMark hm; 75 FreelistLocker x(_collector); 76 MutexLockerEx y(_collector->bitMapLock(), Mutex::_no_safepoint_check_flag); 77 Universe::verify(); 78 } 79 } 80 81 bool VM_CMS_Operation::lost_race() const { 82 if (CMSCollector::abstract_state() == CMSCollector::Idling) { 83 // We lost a race to a foreground collection 84 // -- there's nothing to do 85 return true; 86 } 87 assert(CMSCollector::abstract_state() == legal_state(), 88 "Inconsistent collector state?"); 89 return false; 90 } 91 92 bool VM_CMS_Operation::doit_prologue() { 93 assert(Thread::current()->is_ConcurrentGC_thread(), "just checking"); | 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/cms/concurrentMarkSweepGeneration.inline.hpp" 27 #include "gc/cms/concurrentMarkSweepThread.hpp" 28 #include "gc/cms/vmCMSOperations.hpp" 29 #include "gc/shared/gcLocker.inline.hpp" 30 #include "gc/shared/gcTimer.hpp" 31 #include "gc/shared/gcTraceTime.inline.hpp" 32 #include "gc/shared/isGCActiveMark.hpp" 33 #include "runtime/interfaceSupport.hpp" 34 #include "runtime/os.hpp" 35 #include "utilities/dtrace.hpp" 36 37 ////////////////////////////////////////////////////////// 38 // Methods in abstract class VM_CMS_Operation 39 ////////////////////////////////////////////////////////// 40 void VM_CMS_Operation::acquire_pending_list_lock() { 41 // The caller may block while communicating 42 // with the SLT thread in order to acquire/release the PLL. 43 SurrogateLockerThread* slt = ConcurrentMarkSweepThread::slt(); 44 if (slt != NULL) { 45 slt->manipulatePLL(SurrogateLockerThread::acquirePLL); 46 } else { 47 SurrogateLockerThread::report_missing_slt(); 48 } 49 } 50 51 void VM_CMS_Operation::release_and_notify_pending_list_lock() { 52 // The caller may block while communicating 53 // with the SLT thread in order to acquire/release the PLL. 54 ConcurrentMarkSweepThread::slt()-> 55 manipulatePLL(SurrogateLockerThread::releaseAndNotifyPLL); 56 } 57 58 void VM_CMS_Operation::verify_before_gc() { 59 if (VerifyBeforeGC && 60 GenCollectedHeap::heap()->total_collections() >= VerifyGCStartAt) { 61 GCTraceTime(Info, gc, verify) tm("Verify Before", _collector->_gc_timer_cm); 62 HandleMark hm; 63 FreelistLocker x(_collector); 64 MutexLockerEx y(_collector->bitMapLock(), Mutex::_no_safepoint_check_flag); 65 GenCollectedHeap::heap()->prepare_for_verify(); 66 Universe::verify(); 67 } 68 } 69 70 void VM_CMS_Operation::verify_after_gc() { 71 if (VerifyAfterGC && 72 GenCollectedHeap::heap()->total_collections() >= VerifyGCStartAt) { 73 GCTraceTime(Info, gc, verify) tm("Verify After", _collector->_gc_timer_cm); 74 HandleMark hm; 75 FreelistLocker x(_collector); 76 MutexLockerEx y(_collector->bitMapLock(), Mutex::_no_safepoint_check_flag); 77 Universe::verify(); 78 } 79 } 80 81 bool VM_CMS_Operation::lost_race() const { 82 if (CMSCollector::abstract_state() == CMSCollector::Idling) { 83 // We lost a race to a foreground collection 84 // -- there's nothing to do 85 return true; 86 } 87 assert(CMSCollector::abstract_state() == legal_state(), 88 "Inconsistent collector state?"); 89 return false; 90 } 91 92 bool VM_CMS_Operation::doit_prologue() { 93 assert(Thread::current()->is_ConcurrentGC_thread(), "just checking"); |