1 /*

     2  * Copyright (c) 2014, 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 #ifndef SHARE_VM_LEAKPROFILER_EMITEVENTOPERATION_HPP

    26 #define SHARE_VM_LEAKPROFILER_EMITEVENTOPERATION_HPP

    27 

    28 #include "runtime/vm_operations.hpp"

    29 

    30 class BFSClosure;

    31 class EdgeStore;

    32 class EdgeQueue;

    33 class JfrThreadData;

    34 class ObjectSample;

    35 class ObjectSampler;

    36 

    37 // Safepoint operation for emitting object sample events

    38 class EmitEventOperation : public VM_Operation {

    39  private:

    40   jlong _cutoff_ticks;

    41   bool _emit_all;

    42   VMThread* _vm_thread;

    43   JfrThreadLocal* _vm_thread_local;

    44   ObjectSampler* _object_sampler;

    45 

    46   void write_event(const ObjectSample* sample, EdgeStore* edge_store);

    47   int write_events(EdgeStore* edge_store);

    48 

    49  public:

    50   EmitEventOperation(jlong cutoff_ticks, bool emit_all) :

    51     _cutoff_ticks(cutoff_ticks),

    52     _emit_all(emit_all),

    53     _vm_thread(NULL),

    54     _vm_thread_local(NULL),

    55     _object_sampler(NULL) {

    56   }

    57 

    58   VMOp_Type type() const {

    59     return VMOp_GC_HeapInspection;

    60   }

    61 

    62   Mode evaluation_mode() const {

    63     return _safepoint;

    64   }

    65 

    66   virtual void doit();

    67 };

    68 

    69 #endif // SHARE_VM_LEAKPROFILER_EMITEVENTOPERATION_HPP