1 /*
   2  * Copyright (c) 2017, Red Hat, Inc. and/or its affiliates.
   3  *
   4  * This code is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License version 2 only, as
   6  * published by the Free Software Foundation.
   7  *
   8  * This code is distributed in the hope that it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  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 #ifndef SHARE_VM_GC_SHENANDOAHUTILS_HPP
  25 #define SHARE_VM_GC_SHENANDOAHUTILS_HPP
  26 
  27 #include "gc/shared/isGCActiveMark.hpp"
  28 #include "gc/shared/vmGCOperations.hpp"
  29 #include "gc/shenandoah/shenandoahPhaseTimings.hpp"
  30 #include "memory/allocation.hpp"
  31 #include "runtime/safepoint.hpp"
  32 #include "runtime/vmThread.hpp"
  33 #include "runtime/vm_operations.hpp"
  34 #include "services/memoryService.hpp"
  35 
  36 class GCTimer;
  37 
  38 class ShenandoahGCSession : public StackObj {
  39 private:
  40   GCTimer*  _timer;
  41   TraceMemoryManagerStats _trace_cycle;
  42 public:
  43   ShenandoahGCSession();
  44   ~ShenandoahGCSession();
  45 };
  46 
  47 class ShenandoahGCPhase : public StackObj {
  48 private:
  49   const ShenandoahPhaseTimings::Phase   _phase;
  50 public:
  51   ShenandoahGCPhase(ShenandoahPhaseTimings::Phase phase);
  52   ~ShenandoahGCPhase();
  53 };
  54 
  55 // Aggregates all the things that should happen before/after the pause.
  56 class ShenandoahGCPauseMark : public StackObj {
  57 private:
  58   const GCIdMark                _gc_id_mark;
  59   const SvcGCMarker             _svc_gc_mark;
  60   const IsGCActiveMark          _is_gc_active_mark;
  61   TraceMemoryManagerStats       _trace_pause;
  62 public:
  63   ShenandoahGCPauseMark(uint gc_id, SvcGCMarker::reason_type type);
  64   ~ShenandoahGCPauseMark();
  65 };
  66 
  67 class ShenandoahAllocTrace : public StackObj {
  68 private:
  69   double _start;
  70   size_t _size;
  71   ShenandoahHeap::AllocType _alloc_type;
  72 public:
  73   ShenandoahAllocTrace(size_t words_size, ShenandoahHeap::AllocType alloc_type);
  74   ~ShenandoahAllocTrace();
  75 };
  76 
  77 class ShenandoahSafepoint : public AllStatic {
  78 public:
  79   // check if Shenandoah GC safepoint is in progress
  80   static inline bool is_at_shenandoah_safepoint() {
  81     if (!SafepointSynchronize::is_at_safepoint()) return false;
  82 
  83     VM_Operation* vm_op = VMThread::vm_operation();
  84     if (vm_op == NULL) return false;
  85 
  86     VM_Operation::VMOp_Type type = vm_op->type();
  87     return type == VM_Operation::VMOp_ShenandoahInitMark ||
  88            type == VM_Operation::VMOp_ShenandoahFinalMarkStartEvac ||
  89            type == VM_Operation::VMOp_ShenandoahFinalEvac ||
  90            type == VM_Operation::VMOp_ShenandoahInitPartialGC ||
  91            type == VM_Operation::VMOp_ShenandoahFinalPartialGC ||
  92            type == VM_Operation::VMOp_ShenandoahInitTraversalGC ||
  93            type == VM_Operation::VMOp_ShenandoahFinalTraversalGC ||
  94            type == VM_Operation::VMOp_ShenandoahInitUpdateRefs ||
  95            type == VM_Operation::VMOp_ShenandoahFinalUpdateRefs ||
  96            type == VM_Operation::VMOp_ShenandoahFullGC ||
  97            type == VM_Operation::VMOp_ShenandoahDegeneratedGC;
  98   }
  99 };
 100 
 101 #endif // SHARE_VM_GC_SHENANDOAHUTILS_HPP