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src/share/vm/jfr/leakprofiler/sampling/objectSampler.hpp@150ab470bf7f (annotated)
src/share/vm/jfr/leakprofiler/sampling/objectSampler.hpp
Wed, 05 Dec 2018 16:40:12 +0100
- author
- egahlin
- date
- Wed, 05 Dec 2018 16:40:12 +0100
- changeset 9867
- 150ab470bf7f
- parent 9858
- b985cbb00e68
- child 9885
- 8e875c964f41
- permissions
- -rw-r--r--
8205516: JFR tool
Reviewed-by: mgronlun
| apetushkov@9858 | 1 | /* |
| apetushkov@9858 | 2 | * Copyright (c) 2014, 2018, Oracle and/or its affiliates. All rights reserved. |
| apetushkov@9858 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| apetushkov@9858 | 4 | * |
| apetushkov@9858 | 5 | * This code is free software; you can redistribute it and/or modify it |
| apetushkov@9858 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| apetushkov@9858 | 7 | * published by the Free Software Foundation. |
| apetushkov@9858 | 8 | * |
| apetushkov@9858 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| apetushkov@9858 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| apetushkov@9858 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| apetushkov@9858 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| apetushkov@9858 | 13 | * accompanied this code). |
| apetushkov@9858 | 14 | * |
| apetushkov@9858 | 15 | * You should have received a copy of the GNU General Public License version |
| apetushkov@9858 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| apetushkov@9858 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| apetushkov@9858 | 18 | * |
| apetushkov@9858 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| apetushkov@9858 | 20 | * or visit www.oracle.com if you need additional information or have any |
| apetushkov@9858 | 21 | * questions. |
| apetushkov@9858 | 22 | * |
| apetushkov@9858 | 23 | */ |
| apetushkov@9858 | 24 | |
| apetushkov@9858 | 25 | #ifndef SHARE_VM_LEAKPROFILER_SAMPLING_OBJECTSAMPLER_HPP |
| apetushkov@9858 | 26 | #define SHARE_VM_LEAKPROFILER_SAMPLING_OBJECTSAMPLER_HPP |
| apetushkov@9858 | 27 | |
| apetushkov@9858 | 28 | #include "memory/allocation.hpp" |
| apetushkov@9858 | 29 | #include "jfr/utilities/jfrTime.hpp" |
| apetushkov@9858 | 30 | |
| apetushkov@9858 | 31 | class BoolObjectClosure; |
| apetushkov@9858 | 32 | class OopClosure; |
| apetushkov@9858 | 33 | class ObjectSample; |
| apetushkov@9858 | 34 | class ObjectSampler; |
| apetushkov@9858 | 35 | class SampleList; |
| apetushkov@9858 | 36 | class SamplePriorityQueue; |
| apetushkov@9858 | 37 | class Thread; |
| apetushkov@9858 | 38 | |
| apetushkov@9858 | 39 | // Class reponsible for holding samples and |
| apetushkov@9858 | 40 | // making sure the samples are evenly distributed as |
| apetushkov@9858 | 41 | // new entries are added and removed. |
| apetushkov@9858 | 42 | class ObjectSampler : public CHeapObj<mtTracing> { |
| apetushkov@9858 | 43 | friend class LeakProfiler; |
| apetushkov@9858 | 44 | friend class ObjectSampleCheckpoint; |
| apetushkov@9858 | 45 | friend class StartOperation; |
| apetushkov@9858 | 46 | friend class StopOperation; |
| apetushkov@9858 | 47 | friend class EmitEventOperation; |
| apetushkov@9858 | 48 | private: |
| apetushkov@9858 | 49 | SamplePriorityQueue* _priority_queue; |
| apetushkov@9858 | 50 | SampleList* _list; |
| apetushkov@9858 | 51 | JfrTicks _last_sweep; |
| apetushkov@9858 | 52 | size_t _total_allocated; |
| apetushkov@9858 | 53 | size_t _threshold; |
| apetushkov@9858 | 54 | size_t _size; |
| apetushkov@9858 | 55 | volatile int _tryLock; |
| apetushkov@9858 | 56 | bool _dead_samples; |
| apetushkov@9858 | 57 | |
| apetushkov@9858 | 58 | explicit ObjectSampler(size_t size); |
| apetushkov@9858 | 59 | ~ObjectSampler(); |
| apetushkov@9858 | 60 | |
| apetushkov@9858 | 61 | void add(HeapWord* object, size_t size, JavaThread* thread); |
| apetushkov@9858 | 62 | void remove_dead(ObjectSample* sample); |
| apetushkov@9858 | 63 | void scavenge(); |
| apetushkov@9858 | 64 | |
| apetushkov@9858 | 65 | // Called by GC |
| apetushkov@9858 | 66 | void oops_do(BoolObjectClosure* is_alive, OopClosure* f); |
| apetushkov@9858 | 67 | |
| apetushkov@9858 | 68 | public: |
| apetushkov@9858 | 69 | const ObjectSample* item_at(int index) const; |
| apetushkov@9858 | 70 | ObjectSample* item_at(int index); |
| apetushkov@9858 | 71 | int item_count() const; |
| egahlin@9867 | 72 | const ObjectSample* first() const; |
| apetushkov@9858 | 73 | const ObjectSample* last() const; |
| apetushkov@9858 | 74 | const ObjectSample* last_resolved() const; |
| apetushkov@9858 | 75 | void set_last_resolved(const ObjectSample* sample); |
| apetushkov@9858 | 76 | const JfrTicks& last_sweep() const; |
| apetushkov@9858 | 77 | }; |
| apetushkov@9858 | 78 | |
| apetushkov@9858 | 79 | #endif // SHARE_VM_LEAKPROFILER_SAMPLING_OBJECTSAMPLER_HPP |
