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src/hotspot/share/gc/shenandoah/shenandoahConcurrentRoots.cpp

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  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/shenandoahConcurrentRoots.hpp"
  27 #include "gc/shenandoah/shenandoahHeap.inline.hpp"
  28 
  29 bool ShenandoahConcurrentRoots::can_do_concurrent_roots() {
  30   // Don't support traversal GC at this moment
  31   return !ShenandoahHeap::heap()->is_concurrent_traversal_in_progress();
  32 }
  33 
  34 bool ShenandoahConcurrentRoots::should_do_concurrent_roots() {
  35   ShenandoahHeap* const heap = ShenandoahHeap::heap();
  36   bool stw_gc_in_progress = heap->is_full_gc_in_progress() ||
  37                             heap->is_degenerated_gc_in_progress();
  38   return can_do_concurrent_roots() &&
  39          !stw_gc_in_progress;















  40 }


  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/shenandoahConcurrentRoots.hpp"
  27 #include "gc/shenandoah/shenandoahHeap.inline.hpp"
  28 
  29 bool ShenandoahConcurrentRoots::can_do_concurrent_roots() {
  30   // Don't support traversal GC at this moment
  31   return !ShenandoahHeap::heap()->is_traversal_mode();
  32 }
  33 
  34 bool ShenandoahConcurrentRoots::should_do_concurrent_roots() {



  35   return can_do_concurrent_roots() &&
  36          !ShenandoahHeap::heap()->is_stw_gc_in_progress();
  37 }
  38 
  39 bool ShenandoahConcurrentRoots::can_do_concurrent_class_unloading() {
  40 #if defined(_LP64) && defined(X86) && !defined(SOLARIS)
  41   return ShenandoahCodeRootsStyle == 2 &&
  42          ClassUnloading &&
  43          strcmp(ShenandoahGCMode, "traversal") != 0;
  44 #else
  45   return false;
  46 #endif
  47 }
  48 
  49 bool ShenandoahConcurrentRoots::should_do_concurrent_class_unloading() {
  50   return can_do_concurrent_class_unloading() &&
  51          !ShenandoahHeap::heap()->is_stw_gc_in_progress();
  52 }
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