| /* |
| * Copyright (c) 2017, 2019, Red Hat, Inc. All rights reserved. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #ifndef SHARE_VM_GC_SHENANDOAHUTILS_HPP |
| #define SHARE_VM_GC_SHENANDOAHUTILS_HPP |
| |
| #include "gc/shared/gcCause.hpp" |
| #include "gc/shared/gcTraceTime.inline.hpp" |
| #include "gc/shared/vmGCOperations.hpp" |
| #include "gc/shared/isGCActiveMark.hpp" |
| #include "gc/shared/suspendibleThreadSet.hpp" |
| #include "gc/shenandoah/shenandoahPhaseTimings.hpp" |
| #include "gc/shenandoah/shenandoahThreadLocalData.hpp" |
| #include "jfr/jfrEvents.hpp" |
| #include "memory/allocation.hpp" |
| #include "runtime/safepoint.hpp" |
| #include "runtime/vmThread.hpp" |
| #include "runtime/vmOperations.hpp" |
| #include "services/memoryService.hpp" |
| |
| class GCTimer; |
| |
| class ShenandoahGCSession : public StackObj { |
| private: |
| ShenandoahHeap* const _heap; |
| GCTimer* const _timer; |
| GCTracer* const _tracer; |
| |
| TraceMemoryManagerStats _trace_cycle; |
| public: |
| ShenandoahGCSession(GCCause::Cause cause); |
| ~ShenandoahGCSession(); |
| }; |
| |
| class ShenandoahPausePhase : public StackObj { |
| private: |
| GCTraceTimeImplWrapper<LogLevel::Info, LOG_TAGS(gc)> _tracer; |
| ConcurrentGCTimer* const _timer; |
| |
| public: |
| ShenandoahPausePhase(const char* title, bool log_heap_usage = false); |
| ~ShenandoahPausePhase(); |
| }; |
| |
| class ShenandoahConcurrentPhase : public StackObj { |
| private: |
| GCTraceTimeImplWrapper<LogLevel::Info, LOG_TAGS(gc)> _tracer; |
| ConcurrentGCTimer* const _timer; |
| |
| public: |
| ShenandoahConcurrentPhase(const char* title, bool log_heap_usage = false); |
| ~ShenandoahConcurrentPhase(); |
| }; |
| |
| class ShenandoahGCPhase : public StackObj { |
| private: |
| static ShenandoahPhaseTimings::Phase _current_phase; |
| |
| ShenandoahPhaseTimings* const _timings; |
| const ShenandoahPhaseTimings::Phase _phase; |
| ShenandoahPhaseTimings::Phase _parent_phase; |
| double _start; |
| |
| public: |
| ShenandoahGCPhase(ShenandoahPhaseTimings::Phase phase); |
| ~ShenandoahGCPhase(); |
| |
| static ShenandoahPhaseTimings::Phase current_phase() { return _current_phase; } |
| |
| static bool is_current_phase_valid(); |
| }; |
| |
| class ShenandoahGCSubPhase: public ShenandoahGCPhase { |
| private: |
| ConcurrentGCTimer* const _timer; |
| |
| public: |
| ShenandoahGCSubPhase(ShenandoahPhaseTimings::Phase phase); |
| ~ShenandoahGCSubPhase(); |
| }; |
| |
| class ShenandoahGCWorkerPhase : public StackObj { |
| private: |
| ShenandoahPhaseTimings* const _timings; |
| const ShenandoahPhaseTimings::Phase _phase; |
| public: |
| ShenandoahGCWorkerPhase(ShenandoahPhaseTimings::Phase phase); |
| ~ShenandoahGCWorkerPhase(); |
| }; |
| |
| // Aggregates all the things that should happen before/after the pause. |
| class ShenandoahGCPauseMark : public StackObj { |
| private: |
| ShenandoahHeap* const _heap; |
| const GCIdMark _gc_id_mark; |
| const SvcGCMarker _svc_gc_mark; |
| const IsGCActiveMark _is_gc_active_mark; |
| TraceMemoryManagerStats _trace_pause; |
| |
| public: |
| ShenandoahGCPauseMark(uint gc_id, SvcGCMarker::reason_type type); |
| }; |
| |
| class ShenandoahSafepoint : public AllStatic { |
| public: |
| // Check if Shenandoah GC safepoint is in progress. This is nominally |
| // equivalent to calling SafepointSynchronize::is_at_safepoint(), but |
| // it also checks the Shenandoah specifics, when it can. |
| static inline bool is_at_shenandoah_safepoint() { |
| if (!SafepointSynchronize::is_at_safepoint()) return false; |
| |
| Thread* const thr = Thread::current(); |
| // Shenandoah GC specific safepoints are scheduled by control thread. |
| // So if we are enter here from control thread, then we are definitely not |
| // at Shenandoah safepoint, but at something else. |
| if (thr == ShenandoahHeap::heap()->control_thread()) return false; |
| |
| // This is not VM thread, cannot see what VM thread is doing, |
| // so pretend this is a proper Shenandoah safepoint |
| if (!thr->is_VM_thread()) return true; |
| |
| // Otherwise check we are at proper operation type |
| VM_Operation* vm_op = VMThread::vm_operation(); |
| if (vm_op == NULL) return false; |
| |
| VM_Operation::VMOp_Type type = vm_op->type(); |
| return type == VM_Operation::VMOp_ShenandoahInitMark || |
| type == VM_Operation::VMOp_ShenandoahFinalMarkStartEvac || |
| type == VM_Operation::VMOp_ShenandoahInitUpdateRefs || |
| type == VM_Operation::VMOp_ShenandoahFinalUpdateRefs || |
| type == VM_Operation::VMOp_ShenandoahFullGC || |
| type == VM_Operation::VMOp_ShenandoahDegeneratedGC; |
| } |
| }; |
| |
| class ShenandoahWorkerSession : public StackObj { |
| protected: |
| uint _worker_id; |
| |
| ShenandoahWorkerSession(uint worker_id); |
| ~ShenandoahWorkerSession(); |
| public: |
| static inline uint worker_id() { |
| Thread* thr = Thread::current(); |
| uint id = ShenandoahThreadLocalData::worker_id(thr); |
| assert(id != ShenandoahThreadLocalData::INVALID_WORKER_ID, "Worker session has not been created"); |
| return id; |
| } |
| }; |
| |
| class ShenandoahConcurrentWorkerSession : public ShenandoahWorkerSession { |
| public: |
| ShenandoahConcurrentWorkerSession(uint worker_id) : ShenandoahWorkerSession(worker_id) { } |
| ~ShenandoahConcurrentWorkerSession(); |
| }; |
| |
| class ShenandoahParallelWorkerSession : public ShenandoahWorkerSession { |
| public: |
| ShenandoahParallelWorkerSession(uint worker_id) : ShenandoahWorkerSession(worker_id) { } |
| ~ShenandoahParallelWorkerSession(); |
| }; |
| |
| class ShenandoahSuspendibleThreadSetJoiner { |
| private: |
| SuspendibleThreadSetJoiner _joiner; |
| public: |
| ShenandoahSuspendibleThreadSetJoiner(bool active = true) : _joiner(active) { |
| assert(!ShenandoahThreadLocalData::is_evac_allowed(Thread::current()), "STS should be joined before evac scope"); |
| } |
| ~ShenandoahSuspendibleThreadSetJoiner() { |
| assert(!ShenandoahThreadLocalData::is_evac_allowed(Thread::current()), "STS should be left after evac scope"); |
| } |
| }; |
| |
| class ShenandoahSuspendibleThreadSetLeaver { |
| private: |
| SuspendibleThreadSetLeaver _leaver; |
| public: |
| ShenandoahSuspendibleThreadSetLeaver(bool active = true) : _leaver(active) { |
| assert(!ShenandoahThreadLocalData::is_evac_allowed(Thread::current()), "STS should be left after evac scope"); |
| } |
| ~ShenandoahSuspendibleThreadSetLeaver() { |
| assert(!ShenandoahThreadLocalData::is_evac_allowed(Thread::current()), "STS should be joined before evac scope"); |
| } |
| }; |
| |
| class ShenandoahUtils { |
| public: |
| static size_t round_up_power_of_2(size_t value); |
| }; |
| |
| #endif // SHARE_VM_GC_SHENANDOAHUTILS_HPP |