1 /*
   2  * Copyright (c) 2020, Red Hat, Inc. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   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 #ifndef SHARE_GC_SHENANDOAH_SHENANDOAHSAFEPOINT_HPP
  26 #define SHARE_GC_SHENANDOAH_SHENANDOAHSAFEPOINT_HPP
  27 
  28 #include "memory/allocation.hpp"
  29 #include "runtime/vmThread.hpp"
  30 #include "runtime/vmOperations.hpp"
  31 
  32 
  33 class ShenandoahSafepoint : public AllStatic {
  34 public:
  35   // check if Shenandoah GC safepoint is in progress
  36   static inline bool is_at_shenandoah_safepoint() {
  37     if (!SafepointSynchronize::is_at_safepoint()) return false;
  38 
  39     VM_Operation* vm_op = VMThread::vm_operation();
  40     if (vm_op == NULL) return false;
  41 
  42     VM_Operation::VMOp_Type type = vm_op->type();
  43     return type == VM_Operation::VMOp_ShenandoahInitMark ||
  44            type == VM_Operation::VMOp_ShenandoahFinalMarkStartEvac ||
  45            type == VM_Operation::VMOp_ShenandoahFinalEvac ||
  46            type == VM_Operation::VMOp_ShenandoahInitTraversalGC ||
  47            type == VM_Operation::VMOp_ShenandoahFinalTraversalGC ||
  48            type == VM_Operation::VMOp_ShenandoahInitUpdateRefs ||
  49            type == VM_Operation::VMOp_ShenandoahFinalUpdateRefs ||
  50            type == VM_Operation::VMOp_ShenandoahFullGC ||
  51            type == VM_Operation::VMOp_ShenandoahDegeneratedGC;
  52   }
  53 };
  54 
  55 #endif // SHARE_GC_SHENANDOAH_SHENANDOAHSAFEPOINT_HPP