1 /*
   2  * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef SHARE_JFR_LEAKPROFILER_CHECKPOINT_EVENTEMITTER_HPP
  26 #define SHARE_JFR_LEAKPROFILER_CHECKPOINT_EVENTEMITTER_HPP
  27 
  28 #include "memory/allocation.hpp"
  29 #include "jfr/utilities/jfrTime.hpp"
  30 
  31 typedef u8 traceid;
  32 
  33 class EdgeStore;
  34 class JfrThreadLocal;
  35 class ObjectSample;
  36 class ObjectSampler;
  37 class Thread;
  38 
  39 class EventEmitter : public CHeapObj<mtTracing> {
  40   friend class LeakProfiler;
  41   friend class PathToGcRootsOperation;
  42  private:
  43   const JfrTicks& _start_time;
  44   const JfrTicks& _end_time;
  45   Thread* _thread;
  46   JfrThreadLocal* _jfr_thread_local;
  47   traceid _thread_id;
  48 
  49   EventEmitter(const JfrTicks& start_time, const JfrTicks& end_time);
  50   ~EventEmitter();
  51 
  52   void write_event(const ObjectSample* sample, EdgeStore* edge_store);
  53   size_t write_events(ObjectSampler* sampler, EdgeStore* store, bool emit_all);
  54 
  55   static void emit(ObjectSampler* sampler, int64_t cutoff_ticks, bool emit_all);
  56 };
  57 
  58 #endif // SHARE_JFR_LEAKPROFILER_CHECKPOINT_EVENTEMITTER_HPP