1 /*

     2  * Copyright 1997-2004 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any questions.

    22  *

    23  */

    24 

    25 // BytecodeCounter counts the number of bytecodes executed

    26 

    27 class BytecodeCounter: AllStatic {

    28  private:

    29   NOT_PRODUCT(static int   _counter_value;)

    30   NOT_PRODUCT(static jlong _reset_time;)

    31 

    32   friend class TemplateInterpreterGenerator;

    33   friend class         BytecodeInterpreter;

    34 

    35  public:

    36   // Initialization

    37   static void reset()                      PRODUCT_RETURN;

    38 

    39   // Counter info (all info since last reset)

    40   static int    counter_value()            PRODUCT_RETURN0 NOT_PRODUCT({ return _counter_value; });

    41   static double elapsed_time()             PRODUCT_RETURN0; // in seconds

    42   static double frequency()                PRODUCT_RETURN0; // bytecodes/seconds

    43 

    44   // Counter printing

    45   static void   print()                    PRODUCT_RETURN;

    46 };

    47 

    48 

    49 // BytecodeHistogram collects number of executions of bytecodes

    50 

    51 class BytecodeHistogram: AllStatic {

    52  private:

    53   NOT_PRODUCT(static int _counters[Bytecodes::number_of_codes];)   // a counter for each bytecode

    54 

    55   friend class TemplateInterpreterGenerator;

    56   friend class         InterpreterGenerator;

    57   friend class         BytecodeInterpreter;

    58 

    59  public:

    60   // Initialization

    61   static void reset()                       PRODUCT_RETURN; // reset counters

    62 

    63   // Profile printing

    64   static void print(float cutoff = 0.01F)   PRODUCT_RETURN; // cutoff in percent

    65 };

    66 

    67 

    68 // BytecodePairHistogram collects number of executions of bytecode pairs.

    69 // A bytecode pair is any sequence of two consequtive bytecodes.

    70 

    71 class BytecodePairHistogram: AllStatic {

    72  public: // for SparcWorks

    73   enum Constants {

    74     log2_number_of_codes = 8,                         // use a power of 2 for faster addressing

    75     number_of_codes      = 1 << log2_number_of_codes, // must be no less than Bytecodes::number_of_codes

    76     number_of_pairs      = number_of_codes * number_of_codes

    77   };

    78 

    79  private:

    80   NOT_PRODUCT(static int  _index;)                      // new bytecode is shifted in - used to index into _counters

    81   NOT_PRODUCT(static int  _counters[number_of_pairs];)  // a counter for each pair

    82 

    83   friend class TemplateInterpreterGenerator;

    84   friend class         InterpreterGenerator;

    85 

    86  public:

    87   // Initialization

    88   static void reset()                       PRODUCT_RETURN;   // reset counters

    89 

    90   // Profile printing

    91   static void print(float cutoff = 0.01F)   PRODUCT_RETURN;   // cutoff in percent

    92 };