gmon/tst-sprofil.c

   1 /* Copyright (C) 2001 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by David Mosberger-Tang <davidm@hpl.hp.com>.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <errno.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <sys/profil.h>
  24
  25 #include <bits/wordsize.h>
  26
  27 #define NELEMS(a)       (sizeof (a)/sizeof ((a)[0]))
  28
  29 size_t taddr[] =
  30   {
  31     0x00001000,         /* elf32/hppa */
  32     0x08048000,         /* Linux elf32/x86 */
  33     0x80000000,         /* Linux elf32/m68k */
  34     0x00400000,         /* Linux elf32/mips */
  35     0x01800000,         /* Linux elf32/ppc */
  36     0x00010000          /* Linux elf32/sparc */
  37 #if __WORDSIZE > 32
  38     ,
  39     0x4000000000000000, /* Linux elf64/ia64 */
  40     0x0000000120000000, /* Linux elf64/alpha */
  41     0x4000000000001000, /* elf64/hppa */
  42     0x0000000100000000  /* Linux elf64/sparc */
  43 #endif
  44   };
  45
  46 unsigned int buf[NELEMS (taddr)][0x10000 / sizeof (int)];
  47 unsigned int bshort[5][0x100 / sizeof (int)];
  48 unsigned int blong[1][0x1000 / sizeof (int)];
  49 unsigned int vlong[1][0x2000 / sizeof (int)];
  50
  51 static long int
  52 fac (long int n)
  53 {
  54   if (n == 0)
  55     return 1;
  56   return n * fac (n - 1);
  57 }
  58
  59 int
  60 main (int argc, char **argv)
  61 {
  62   unsigned int ovfl = 0, profcnt = 0;
  63   struct timeval tv, start;
  64   struct prof prof[32];
  65   double t_tick, delta;
  66   long int sum = 0;
  67   int i, j;
  68
  69   for (i = 0; i < NELEMS (taddr); ++i)
  70     {
  71       prof[profcnt].pr_base = buf[i];
  72       prof[profcnt].pr_size = sizeof (buf[i]);
  73       prof[profcnt].pr_off = taddr[i];
  74       prof[profcnt].pr_scale = 0x10000;
  75       ++profcnt;
  76     }
  77
  78   prof[profcnt].pr_base = blong[0];
  79   prof[profcnt].pr_size = sizeof (blong[0]);
  80   prof[profcnt].pr_off = 0x80001000;
  81   prof[profcnt].pr_scale = 0x10000;
  82   ++profcnt;
  83
  84   prof[profcnt].pr_base = bshort[0];
  85   prof[profcnt].pr_size = sizeof (bshort[0]);
  86   prof[profcnt].pr_off = 0x80000080;
  87   prof[profcnt].pr_scale = 0x10000;
  88   ++profcnt;
  89
  90   prof[profcnt].pr_base = bshort[1];
  91   prof[profcnt].pr_size = sizeof (bshort[1]);
  92   prof[profcnt].pr_off = 0x80000f80;
  93   prof[profcnt].pr_scale = 0x10000;
  94   ++profcnt;
  95
  96   prof[profcnt].pr_base = bshort[2];
  97   prof[profcnt].pr_size = sizeof (bshort[2]);
  98   prof[profcnt].pr_off = 0x80001080;
  99   prof[profcnt].pr_scale = 0x10000;
 100   ++profcnt;
 101
 102   prof[profcnt].pr_base = bshort[3];
 103   prof[profcnt].pr_size = sizeof (bshort[3]);
 104   prof[profcnt].pr_off = 0x80001f80;
 105   prof[profcnt].pr_scale = 0x10000;
 106   ++profcnt;
 107
 108   prof[profcnt].pr_base = bshort[4];
 109   prof[profcnt].pr_size = sizeof (bshort[4]);
 110   prof[profcnt].pr_off = 0x80002080;
 111   prof[profcnt].pr_scale = 0x10000;
 112   ++profcnt;
 113
 114   prof[profcnt].pr_base = vlong[0];
 115   prof[profcnt].pr_size = sizeof (vlong[0]);
 116   prof[profcnt].pr_off = 0x80000080;
 117   prof[profcnt].pr_scale = 0x10000;
 118   ++profcnt;
 119
 120   /* Set up overflow counter (must be last on Irix).  */
 121   prof[profcnt].pr_base = &ovfl;
 122   prof[profcnt].pr_size = sizeof (ovfl);
 123   prof[profcnt].pr_off = 0;
 124   prof[profcnt].pr_scale = 2;
 125   ++profcnt;
 126
 127   /* Turn it on.  */
 128   if (sprofil (prof, profcnt, &tv, PROF_UINT) < 0)
 129     {
 130       if (errno == ENOSYS)
 131         exit (0);
 132       perror ("sprofil");
 133       exit (1);
 134     }
 135
 136   t_tick = tv.tv_sec + 1e-6 * tv.tv_usec;
 137   printf ("profiling period = %g ms\n", 1e3 * t_tick);
 138
 139   gettimeofday (&start, NULL);
 140   do
 141     {
 142       for (i = 0; i < 21; ++i)
 143         sum += fac (i);
 144
 145       gettimeofday (&tv, NULL);
 146       timersub (&tv, &start, &tv);
 147       delta = tv.tv_sec + 1e-6 * tv.tv_usec;
 148     }
 149   while (delta < 1000 * t_tick);
 150
 151   printf ("sum = 0x%lx\n", sum);
 152
 153   /* Turn it off.  */
 154   if (sprofil (NULL, 0, NULL, 0) < 0)
 155     {
 156       if (errno == ENOSYS)
 157         exit (0);
 158       perror ("sprofil");
 159       exit (1);
 160     }
 161
 162   printf ("overflow = %u\n", ovfl);
 163   for (i = 0; i < NELEMS (taddr); ++i)
 164     for (j = 0; j < 0x10000 / sizeof (int); ++j)
 165       if (buf[i][j] != 0)
 166         printf ("%0*Zx\t%u\t(buffer %d)\n",
 167                 (int) (sizeof (size_t) * 2),
 168                 (taddr[i] + (char *) &buf[i][j] - (char *) &buf[i][0]),
 169                 buf[i][j], i);
 170
 171   return 0;
 172 }