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 "runtime/vmThread.hpp"
  28 #include "gc_implementation/shared/isGCActiveMark.hpp"
  29 #include "gc_implementation/shared/vmGCOperations.hpp"
  30 #include "memory/allocation.hpp"
  31 #include "gc_implementation/shenandoah/shenandoahPhaseTimings.hpp"
  32 
  33 class GCTimer;
  34 
  35 class ShenandoahGCSession : public StackObj {
  36 private:
  37   GCTimer*  _timer;
  38   TraceMemoryManagerStats _trace_cycle;
  39 public:
  40   ShenandoahGCSession();
  41   ~ShenandoahGCSession();
  42 };
  43 
  44 class ShenandoahGCPhase : public StackObj {
  45 private:
  46   const ShenandoahPhaseTimings::Phase   _phase;
  47 public:
  48   ShenandoahGCPhase(ShenandoahPhaseTimings::Phase phase);
  49   ~ShenandoahGCPhase();
  50 };
  51 
  52 // Aggregates all the things that should happen before/after the pause.
  53 class ShenandoahGCPauseMark : public StackObj {
  54 private:
  55   const SvcGCMarker       _svc_gc_mark;
  56   const IsGCActiveMark    _is_gc_active_mark;
  57   TraceMemoryManagerStats _trace_pause;
  58 public:
  59   ShenandoahGCPauseMark(SvcGCMarker::reason_type type);
  60   ~ShenandoahGCPauseMark();
  61 };
  62 
  63 class ShenandoahAllocTrace : public StackObj {
  64 private:
  65   double _start;
  66   size_t _size;
  67   ShenandoahHeap::AllocType _alloc_type;
  68 public:
  69   ShenandoahAllocTrace(size_t words_size, ShenandoahHeap::AllocType alloc_type);
  70   ~ShenandoahAllocTrace();
  71 };
  72 
  73 class ShenandoahSafepoint : public AllStatic {
  74 public:
  75   // check if Shenandoah GC safepoint is in progress
  76   static inline bool is_at_shenandoah_safepoint() {
  77     if (!SafepointSynchronize::is_at_safepoint()) return false;
  78 
  79     VM_Operation* vm_op = VMThread::vm_operation();
  80     if (vm_op == NULL) return false;
  81 
  82     VM_Operation::VMOp_Type type = vm_op->type();
  83     return type == VM_Operation::VMOp_ShenandoahInitMark ||
  84            type == VM_Operation::VMOp_ShenandoahFinalMarkStartEvac ||
  85            type == VM_Operation::VMOp_ShenandoahFinalEvac ||
  86            type == VM_Operation::VMOp_ShenandoahInitUpdateRefs ||
  87            type == VM_Operation::VMOp_ShenandoahFinalUpdateRefs ||
  88            type == VM_Operation::VMOp_ShenandoahFullGC ||
  89            type == VM_Operation::VMOp_ShenandoahDegeneratedGC;
  90   }
  91 };
  92 
  93 #endif // SHARE_VM_GC_SHENANDOAHUTILS_HPP