gprof/gmon.h

   1 /*
   2  * Copyright (c) 1983, 1991, 1993, 2001
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29 #ifndef gmon_h
  30 #define gmon_h
  31
  32 /* Size of the 4.4BSD gmon header */
  33 #define GMON_HDRSIZE_BSD44_32 (4 + 4 + 4 + 4 + 4 + (3 * 4))
  34 #define GMON_HDRSIZE_BSD44_64 (8 + 8 + 4 + 4 + 4 + (3 * 4))
  35
  36 /* *INDENT-OFF* */
  37 /* For documentation purposes only.
  38
  39    struct raw_phdr
  40     {
  41       char low_pc[sizeof(void *)];   -- base pc address of sample buffer
  42       char high_pc[sizeof(void *)];  -- max pc address of sampled buffer
  43       char ncnt[4];                  -- size of sample buffer (plus this
  44                                         header)
  45
  46       char version[4];               -- version number
  47       char profrate[4];              -- profiling clock rate
  48       char spare[3*4];               -- reserved
  49     };
  50 */
  51 /* *INDENT-ON* */
  52
  53 #define GMONVERSION     0x00051879
  54
  55 /* Size of the old BSD gmon header */
  56 #define GMON_HDRSIZE_OLDBSD_32 (4 + 4 + 4)
  57
  58 /* FIXME: Checking host compiler defines here means that we can't
  59    use a cross gprof alpha OSF.  */
  60 #if defined(__alpha__) && defined (__osf__)
  61 #define GMON_HDRSIZE_OLDBSD_64 (8 + 8 + 4 + 4)
  62 #else
  63 #define GMON_HDRSIZE_OLDBSD_64 (8 + 8 + 4)
  64 #endif
  65
  66 /* *INDENT-OFF* */
  67 /* For documentation purposes only.
  68
  69   struct old_raw_phdr
  70     {
  71       char low_pc[sizeof(void *)];  -- base pc address of sample buffer
  72       char high_pc[sizeof(void *)]  -- max pc address of sampled buffer
  73       char ncnt[4];                 -- size of sample buffer (plus this
  74                                        header)
  75
  76       if defined (__alpha__) && defined (__osf__)
  77       char pad[4];                  -- DEC's OSF v3.0 uses 4 bytes of padding
  78                                     -- to bring the header to a size that is a
  79                                     -- multiple of 8.
  80       endif
  81     };
  82 */
  83 /* *INDENT-ON* */
  84
  85 /*
  86  * Histogram counters are unsigned shorts:
  87  */
  88 #define HISTCOUNTER unsigned short
  89
  90 /*
  91  * Fraction of text space to allocate for histogram counters here, 1/2:
  92  */
  93 #define HISTFRACTION    2
  94
  95 /*
  96  * Fraction of text space to allocate for from hash buckets.  The
  97  * value of HASHFRACTION is based on the minimum number of bytes of
  98  * separation between two subroutine call points in the object code.
  99  * Given MIN_SUBR_SEPARATION bytes of separation the value of
 100  * HASHFRACTION is calculated as:
 101  *
 102  *      HASHFRACTION = MIN_SUBR_SEPARATION / (2 * sizeof(short) - 1);
 103  *
 104  * For the VAX, the shortest two call sequence is:
 105  *
 106  *      calls   $0,(r0)
 107  *      calls   $0,(r0)
 108  *
 109  * which is separated by only three bytes, thus HASHFRACTION is
 110  * calculated as:
 111  *
 112  *      HASHFRACTION = 3 / (2 * 2 - 1) = 1
 113  *
 114  * Note that the division above rounds down, thus if MIN_SUBR_FRACTION
 115  * is less than three, this algorithm will not work!
 116  */
 117 #define HASHFRACTION 1
 118
 119 /*
 120  * Percent of text space to allocate for tostructs with a minimum:
 121  */
 122 #define ARCDENSITY      2
 123 #define MINARCS         50
 124
 125 struct tostruct
 126   {
 127     char *selfpc;
 128     int count;
 129     unsigned short link;
 130   };
 131
 132 /*
 133  * A raw arc, with pointers to the calling site and the called site
 134  * and a count.  Everything is defined in terms of characters so
 135  * as to get a packed representation (otherwise, different compilers
 136  * might introduce different padding):
 137  */
 138
 139 /* *INDENT-OFF* */
 140 /* For documentation purposes only.
 141
 142   struct raw_arc
 143     {
 144       char from_pc[sizeof(void *)];
 145       char self_pc[sizeof(void *)];
 146       char count[sizeof(long)];
 147     };
 148 */
 149 /* *INDENT-ON* */
 150
 151 /*
 152  * General rounding functions:
 153  */
 154 #define ROUNDDOWN(x,y)  (((x)/(y))*(y))
 155 #define ROUNDUP(x,y)    ((((x)+(y)-1)/(y))*(y))
 156
 157 #endif /* gmon_h */