1 /*
   2  * Copyright (c) 2016, 2018, 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 #include "precompiled.hpp"
  26 #include "gc/g1/g1CollectedHeap.hpp"
  27 #include "gc/g1/heapRegion.hpp"
  28 #include "g1HeapRegionEventSender.hpp"
  29 #include "jfr/jfrEvents.hpp"
  30 #include "runtime/vmThread.hpp"
  31 
  32 class DumpEventInfoClosure : public HeapRegionClosure {
  33 public:
  34   bool do_heap_region(HeapRegion* r) {
  35     EventG1HeapRegionInformation evt;
  36     evt.set_index(r->hrm_index());
  37     evt.set_type(r->get_trace_type());
  38     evt.set_start((uintptr_t)r->bottom());
  39     evt.set_used(r->used());
  40     evt.commit();
  41     return false;
  42   }
  43 };
  44 
  45 class VM_G1SendHeapRegionInfoEvents : public VM_Operation {
  46   virtual void doit() {
  47     DumpEventInfoClosure c;
  48     G1CollectedHeap::heap()->heap_region_iterate(&c);
  49   }
  50   virtual VMOp_Type type() const { return VMOp_HeapIterateOperation; }
  51 };
  52 
  53 void G1HeapRegionEventSender::send_events() {
  54   if (UseG1GC) {
  55     VM_G1SendHeapRegionInfoEvents op;
  56     VMThread::execute(&op);
  57   }
  58 }