--- a/src/share/vm/gc_implementation/g1/concurrentMark.cpp	Mon Jun 23 16:43:41 2014 +0200
+++ b/src/share/vm/gc_implementation/g1/concurrentMark.cpp	Fri Apr 11 12:29:24 2014 +0200
@@ -977,13 +977,13 @@
   }
 
   if (concurrent()) {
-    ConcurrentGCThread::stsLeave();
+    SuspendibleThreadSet::leave();
   }
 
   bool barrier_aborted = !_first_overflow_barrier_sync.enter();
 
   if (concurrent()) {
-    ConcurrentGCThread::stsJoin();
+    SuspendibleThreadSet::join();
   }
   // at this point everyone should have synced up and not be doing any
   // more work
@@ -1036,13 +1036,13 @@
   }
 
   if (concurrent()) {
-    ConcurrentGCThread::stsLeave();
+    SuspendibleThreadSet::leave();
   }
 
   bool barrier_aborted = !_second_overflow_barrier_sync.enter();
 
   if (concurrent()) {
-    ConcurrentGCThread::stsJoin();
+    SuspendibleThreadSet::join();
   }
   // at this point everything should be re-initialized and ready to go
 
@@ -1094,7 +1094,7 @@
 
     double start_vtime = os::elapsedVTime();
 
-    ConcurrentGCThread::stsJoin();
+    SuspendibleThreadSet::join();
 
     assert(worker_id < _cm->active_tasks(), "invariant");
     CMTask* the_task = _cm->task(worker_id);
@@ -1121,9 +1121,9 @@
         if (!_cm->has_aborted() && the_task->has_aborted()) {
           sleep_time_ms =
             (jlong) (elapsed_vtime_sec * _cm->sleep_factor() * 1000.0);
-          ConcurrentGCThread::stsLeave();
+          SuspendibleThreadSet::leave();
           os::sleep(Thread::current(), sleep_time_ms, false);
-          ConcurrentGCThread::stsJoin();
+          SuspendibleThreadSet::join();
         }
         double end_time2_sec = os::elapsedTime();
         double elapsed_time2_sec = end_time2_sec - start_time_sec;
@@ -1141,7 +1141,7 @@
     the_task->record_end_time();
     guarantee(!the_task->has_aborted() || _cm->has_aborted(), "invariant");
 
-    ConcurrentGCThread::stsLeave();
+    SuspendibleThreadSet::leave();
 
     double end_vtime = os::elapsedVTime();
     _cm->update_accum_task_vtime(worker_id, end_vtime - start_vtime);
@@ -3336,21 +3336,17 @@
 
 // We take a break if someone is trying to stop the world.
 bool ConcurrentMark::do_yield_check(uint worker_id) {
-  if (should_yield()) {
+  if (SuspendibleThreadSet::should_yield()) {
     if (worker_id == 0) {
       _g1h->g1_policy()->record_concurrent_pause();
     }
-    cmThread()->yield();
+    SuspendibleThreadSet::yield();
     return true;
   } else {
     return false;
   }
 }
 
-bool ConcurrentMark::should_yield() {
-  return cmThread()->should_yield();
-}
-
 bool ConcurrentMark::containing_card_is_marked(void* p) {
   size_t offset = pointer_delta(p, _g1h->reserved_region().start(), 1);
   return _card_bm.at(offset >> CardTableModRefBS::card_shift);
@@ -3639,7 +3635,7 @@
 #endif // _MARKING_STATS_
 
   // (4) We check whether we should yield. If we have to, then we abort.
-  if (_cm->should_yield()) {
+  if (SuspendibleThreadSet::should_yield()) {
     // We should yield. To do this we abort the task. The caller is
     // responsible for yielding.
     set_has_aborted();