1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/jfr/leakprofiler/sampling/objectSampler.hpp Mon Aug 12 18:30:40 2019 +0300
1.3 @@ -0,0 +1,78 @@
1.4 +/*
1.5 + * Copyright (c) 2014, 2018, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#ifndef SHARE_VM_LEAKPROFILER_SAMPLING_OBJECTSAMPLER_HPP
1.29 +#define SHARE_VM_LEAKPROFILER_SAMPLING_OBJECTSAMPLER_HPP
1.30 +
1.31 +#include "memory/allocation.hpp"
1.32 +#include "jfr/utilities/jfrTime.hpp"
1.33 +
1.34 +class BoolObjectClosure;
1.35 +class OopClosure;
1.36 +class ObjectSample;
1.37 +class ObjectSampler;
1.38 +class SampleList;
1.39 +class SamplePriorityQueue;
1.40 +class Thread;
1.41 +
1.42 +// Class reponsible for holding samples and
1.43 +// making sure the samples are evenly distributed as
1.44 +// new entries are added and removed.
1.45 +class ObjectSampler : public CHeapObj<mtTracing> {
1.46 + friend class LeakProfiler;
1.47 + friend class ObjectSampleCheckpoint;
1.48 + friend class StartOperation;
1.49 + friend class StopOperation;
1.50 + friend class EmitEventOperation;
1.51 + private:
1.52 + SamplePriorityQueue* _priority_queue;
1.53 + SampleList* _list;
1.54 + JfrTicks _last_sweep;
1.55 + size_t _total_allocated;
1.56 + size_t _threshold;
1.57 + size_t _size;
1.58 + volatile int _tryLock;
1.59 + bool _dead_samples;
1.60 +
1.61 + explicit ObjectSampler(size_t size);
1.62 + ~ObjectSampler();
1.63 +
1.64 + void add(HeapWord* object, size_t size, JavaThread* thread);
1.65 + void remove_dead(ObjectSample* sample);
1.66 + void scavenge();
1.67 +
1.68 + // Called by GC
1.69 + void oops_do(BoolObjectClosure* is_alive, OopClosure* f);
1.70 +
1.71 + public:
1.72 + const ObjectSample* item_at(int index) const;
1.73 + ObjectSample* item_at(int index);
1.74 + int item_count() const;
1.75 + const ObjectSample* last() const;
1.76 + const ObjectSample* last_resolved() const;
1.77 + void set_last_resolved(const ObjectSample* sample);
1.78 + const JfrTicks& last_sweep() const;
1.79 +};
1.80 +
1.81 +#endif // SHARE_VM_LEAKPROFILER_SAMPLING_OBJECTSAMPLER_HPP
