1 /*

     2  * Copyright (c) 1998, 2010, 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_RUNTIME_MEMPROFILER_HPP

    26 #define SHARE_VM_RUNTIME_MEMPROFILER_HPP

    27 

    28 // Prints periodic memory usage trace of HotSpot VM

    29 

    30 class MemProfilerTask;

    31 

    32 class MemProfiler : AllStatic {

    33  friend class MemProfilerTask;

    34  private:

    35   static MemProfilerTask* _task;

    36   static FILE* _log_fp;

    37   // Do trace (callback from MemProfilerTask and from disengage)

    38   static void do_trace()      PRODUCT_RETURN;

    39  public:

    40   // Start/stop the profiler

    41   static void engage()        PRODUCT_RETURN;

    42   static void disengage()     PRODUCT_RETURN;

    43   // Tester

    44   static bool is_active()     PRODUCT_RETURN0;

    45 };

    46 

    47 #endif // SHARE_VM_RUNTIME_MEMPROFILER_HPP