gmon/tst-sprofil.c

   1 /* Copyright (C) 2001-2017 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, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <errno.h>
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <sys/profil.h>
  23
  24 #include <bits/wordsize.h>
  25
  26 #define NELEMS(a)       (sizeof (a)/sizeof ((a)[0]))
  27
  28 size_t taddr[] =
  29   {
  30     0x00001000,         /* elf32/hppa */
  31     0x08048000,         /* Linux elf32/x86 */
  32     0x80000000,         /* Linux elf32/m68k */
  33     0x00400000,         /* Linux elf32/mips */
  34     0x01800000,         /* Linux elf32/ppc */
  35     0x00010000          /* Linux elf32/sparc */
  36 #if __WORDSIZE > 32
  37     ,
  38     0x4000000000000000, /* Linux elf64/ia64 */
  39     0x0000000120000000, /* Linux elf64/alpha */
  40     0x4000000000001000, /* elf64/hppa */
  41     0x0000000100000000  /* Linux elf64/sparc */
  42 #endif
  43   };
  44
  45 unsigned int buf[NELEMS (taddr)][0x10000 / sizeof (int)];
  46 unsigned int bshort[5][0x100 / sizeof (int)];
  47 unsigned int blong[1][0x1000 / sizeof (int)];
  48 unsigned int vlong[1][0x2000 / sizeof (int)];
  49
  50 static long int
  51 fac (long int n)
  52 {
  53   if (n == 0)
  54     return 1;
  55   return n * fac (n - 1);
  56 }
  57
  58 int
  59 main (int argc, char **argv)
  60 {
  61   unsigned int ovfl = 0, profcnt = 0;
  62   struct timeval tv, start;
  63   struct prof prof[32];
  64   double t_tick, delta;
  65   long int sum = 0;
  66   int i, j;
  67
  68   for (i = 0; i < NELEMS (taddr); ++i)
  69     {
  70       prof[profcnt].pr_base = buf[i];
  71       prof[profcnt].pr_size = sizeof (buf[i]);
  72       prof[profcnt].pr_off = taddr[i];
  73       prof[profcnt].pr_scale = 0x10000;
  74       ++profcnt;
  75     }
  76
  77   prof[profcnt].pr_base = blong[0];
  78   prof[profcnt].pr_size = sizeof (blong[0]);
  79   prof[profcnt].pr_off = 0x80001000;
  80   prof[profcnt].pr_scale = 0x10000;
  81   ++profcnt;
  82
  83   prof[profcnt].pr_base = bshort[0];
  84   prof[profcnt].pr_size = sizeof (bshort[0]);
  85   prof[profcnt].pr_off = 0x80000080;
  86   prof[profcnt].pr_scale = 0x10000;
  87   ++profcnt;
  88
  89   prof[profcnt].pr_base = bshort[1];
  90   prof[profcnt].pr_size = sizeof (bshort[1]);
  91   prof[profcnt].pr_off = 0x80000f80;
  92   prof[profcnt].pr_scale = 0x10000;
  93   ++profcnt;
  94
  95   prof[profcnt].pr_base = bshort[2];
  96   prof[profcnt].pr_size = sizeof (bshort[2]);
  97   prof[profcnt].pr_off = 0x80001080;
  98   prof[profcnt].pr_scale = 0x10000;
  99   ++profcnt;
 100
 101   prof[profcnt].pr_base = bshort[3];
 102   prof[profcnt].pr_size = sizeof (bshort[3]);
 103   prof[profcnt].pr_off = 0x80001f80;
 104   prof[profcnt].pr_scale = 0x10000;
 105   ++profcnt;
 106
 107   prof[profcnt].pr_base = bshort[4];
 108   prof[profcnt].pr_size = sizeof (bshort[4]);
 109   prof[profcnt].pr_off = 0x80002080;
 110   prof[profcnt].pr_scale = 0x10000;
 111   ++profcnt;
 112
 113   prof[profcnt].pr_base = vlong[0];
 114   prof[profcnt].pr_size = sizeof (vlong[0]);
 115   prof[profcnt].pr_off = 0x80000080;
 116   prof[profcnt].pr_scale = 0x10000;
 117   ++profcnt;
 118
 119   /* Set up overflow counter (must be last on Irix).  */
 120   prof[profcnt].pr_base = &ovfl;
 121   prof[profcnt].pr_size = sizeof (ovfl);
 122   prof[profcnt].pr_off = 0;
 123   prof[profcnt].pr_scale = 2;
 124   ++profcnt;
 125
 126   /* Turn it on.  */
 127   if (sprofil (prof, profcnt, &tv, PROF_UINT) < 0)
 128     {
 129       if (errno == ENOSYS)
 130         exit (0);
 131       perror ("sprofil");
 132       exit (1);
 133     }
 134
 135   t_tick = tv.tv_sec + 1e-6 * tv.tv_usec;
 136   printf ("profiling period = %g ms\n", 1e3 * t_tick);
 137
 138   gettimeofday (&start, NULL);
 139   do
 140     {
 141       for (i = 0; i < 21; ++i)
 142         sum += fac (i);
 143
 144       gettimeofday (&tv, NULL);
 145       timersub (&tv, &start, &tv);
 146       delta = tv.tv_sec + 1e-6 * tv.tv_usec;
 147     }
 148   while (delta < 1000 * t_tick);
 149
 150   printf ("sum = 0x%lx\n", sum);
 151
 152   /* Turn it off.  */
 153   if (sprofil (NULL, 0, NULL, 0) < 0)
 154     {
 155       if (errno == ENOSYS)
 156         exit (0);
 157       perror ("sprofil");
 158       exit (1);
 159     }
 160
 161   printf ("overflow = %u\n", ovfl);
 162   for (i = 0; i < NELEMS (taddr); ++i)
 163     for (j = 0; j < 0x10000 / sizeof (int); ++j)
 164       if (buf[i][j] != 0)
 165         printf ("%0*Zx\t%u\t(buffer %d)\n",
 166                 (int) (sizeof (size_t) * 2),
 167                 (taddr[i] + ((char *) &buf[i][j] - (char *) &buf[i][0])),
 168                 buf[i][j], i);
 169
 170   return 0;
 171 }