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_STARTOPERATION_HPP

    26 #define SHARE_VM_LEAKPROFILER_STARTOPERATION_HPP

    27 

    28 #include "jfr/recorder/jfrRecorder.hpp"

    29 #include "jfr/leakprofiler/leakProfiler.hpp"

    30 #include "jfr/leakprofiler/sampling/objectSampler.hpp"

    31 #include "jfr/recorder/service/jfrOptionSet.hpp"

    32 #include "logging/log.hpp"

    33 #include "runtime/vm_operations.hpp"

    34 

    35 // Safepoint operation for starting leak profiler object sampler

    36 class StartOperation : public VM_Operation {

    37  private:

    38   jlong _sample_count;

    39  public:

    40   StartOperation(jlong sample_count) :

    41     _sample_count(sample_count) {

    42   }

    43 

    44   Mode evaluation_mode() const {

    45     return _safepoint;

    46   }

    47 

    48   VMOp_Type type() const {

    49     return VMOp_GC_HeapInspection;

    50   }

    51 

    52   virtual void doit() {

    53     assert(!LeakProfiler::is_running(), "invariant");

    54     jint queue_size = JfrOptionSet::old_object_queue_size();

    55     LeakProfiler::set_object_sampler(new ObjectSampler(queue_size));

    56     log_trace(jfr, system)( "Object sampling started");

    57   }

    58 };

    59 

    60 #endif // SHARE_VM_LEAKPROFILER_STARTOPERATION_HPP