jdk8-mips64-public/hotspot: src/share/vm/utilities/histogram.hpp@2d4762ec74af

7003748: Decode C stack frames when symbols are presented (PhoneHome project)
Summary: Implemented in-process C native stack frame decoding when symbols are available.
Reviewed-by: coleenp, never

     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  */

    25 #ifndef SHARE_VM_UTILITIES_HISTOGRAM_HPP

    26 #define SHARE_VM_UTILITIES_HISTOGRAM_HPP

    28 #include "memory/allocation.hpp"

    29 #include "runtime/os.hpp"

    30 #include "utilities/growableArray.hpp"

    31 #ifdef TARGET_OS_FAMILY_linux

    32 # include "os_linux.inline.hpp"

    33 #endif

    34 #ifdef TARGET_OS_FAMILY_solaris

    35 # include "os_solaris.inline.hpp"

    36 #endif

    37 #ifdef TARGET_OS_FAMILY_windows

    38 # include "os_windows.inline.hpp"

    39 #endif

    41 // This class provides a framework for collecting various statistics.

    42 // The current implementation is oriented towards counting invocations

    43 // of various types, but that can be easily changed.

    44 //

    45 // To use it, you need to declare a Histogram*, and a subtype of

    46 // HistogramElement:

    47 //

    48 //  HistogramElement* MyHistogram;

    49 //

    50 //  class MyHistogramElement : public HistogramElement {

    51 //    public:

    52 //      MyHistogramElement(char* name);

    53 //  };

    54 //

    55 //  MyHistogramElement::MyHistogramElement(char* elementName) {

    56 //    _name = elementName;

    57 //

    58 //    if(MyHistogram == NULL)

    59 //      MyHistogram = new Histogram("My Call Counts",100);

    60 //

    61 //    MyHistogram->add_element(this);

    62 //  }

    63 //

    64 //  #define MyCountWrapper(arg) static MyHistogramElement* e = new MyHistogramElement(arg); e->increment_count()

    65 //

    66 // This gives you a simple way to count invocations of specfic functions:

    67 //

    68 // void a_function_that_is_being_counted() {

    69 //   MyCountWrapper("FunctionName");

    70 //   ...

    71 // }

    72 //

    73 // To print the results, invoke print() on your Histogram*.

    75 #ifdef ASSERT

    77 class HistogramElement : public CHeapObj {

    78  protected:

    79   jint _count;

    80   const char* _name;

    82  public:

    83   HistogramElement();

    84   virtual int count();

    85   virtual const char* name();

    86   virtual void increment_count();

    87   void print_on(outputStream* st) const;

    88   virtual int compare(HistogramElement* e1,HistogramElement* e2);

    89 };

    91 class Histogram : public CHeapObj {

    92  protected:

    93   GrowableArray<HistogramElement*>* _elements;

    94   GrowableArray<HistogramElement*>* elements() { return _elements; }

    95   const char* _title;

    96   const char* title() { return _title; }

    97   static int sort_helper(HistogramElement** e1,HistogramElement** e2);

    98   virtual void print_header(outputStream* st);

    99   virtual void print_elements(outputStream* st);

   101  public:

   102   Histogram(const char* title,int estimatedSize);

   103   virtual void add_element(HistogramElement* element);

   104   void print_on(outputStream* st) const;

   105 };

   107 #endif

   109 #endif // SHARE_VM_UTILITIES_HISTOGRAM_HPP

Mercurial > jdk8-mips64-public > hotspot / file revision

src/share/vm/utilities/histogram.hpp@2d4762ec74af

src/share/vm/utilities/histogram.hpp