gmon/tst-sprofil.c

   1 /* Copyright (C) 2001-2021 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <errno.h>
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <sys/profil.h>
  22
  23 #include <bits/wordsize.h>
  24
  25 #define NELEMS(a)       (sizeof (a)/sizeof ((a)[0]))
  26
  27 size_t taddr[] =
  28   {
  29     0x00001000,         /* elf32/hppa */
  30     0x08048000,         /* Linux elf32/x86 */
  31     0x80000000,         /* Linux elf32/m68k */
  32     0x00400000,         /* Linux elf32/mips */
  33     0x01800000,         /* Linux elf32/ppc */
  34     0x00010000          /* Linux elf32/sparc */
  35 #if __WORDSIZE > 32
  36     ,
  37     0x4000000000000000, /* Linux elf64/ia64 */
  38     0x0000000120000000, /* Linux elf64/alpha */
  39     0x4000000000001000, /* elf64/hppa */
  40     0x0000000100000000  /* Linux elf64/sparc */
  41 #endif
  42   };
  43
  44 unsigned int buf[NELEMS (taddr)][0x10000 / sizeof (int)];
  45 unsigned int bshort[5][0x100 / sizeof (int)];
  46 unsigned int blong[1][0x1000 / sizeof (int)];
  47 unsigned int vlong[1][0x2000 / sizeof (int)];
  48
  49 static long int
  50 fac (long int n)
  51 {
  52   if (n == 0)
  53     return 1;
  54   return n * fac (n - 1);
  55 }
  56
  57 int
  58 main (int argc, char **argv)
  59 {
  60   unsigned int ovfl = 0, profcnt = 0;
  61   struct timeval tv, start;
  62   struct prof prof[32];
  63   double t_tick, delta;
  64   long int sum = 0;
  65   int i, j;
  66
  67   for (i = 0; i < NELEMS (taddr); ++i)
  68     {
  69       prof[profcnt].pr_base = buf[i];
  70       prof[profcnt].pr_size = sizeof (buf[i]);
  71       prof[profcnt].pr_off = taddr[i];
  72       prof[profcnt].pr_scale = 0x10000;
  73       ++profcnt;
  74     }
  75
  76   prof[profcnt].pr_base = blong[0];
  77   prof[profcnt].pr_size = sizeof (blong[0]);
  78   prof[profcnt].pr_off = 0x80001000;
  79   prof[profcnt].pr_scale = 0x10000;
  80   ++profcnt;
  81
  82   prof[profcnt].pr_base = bshort[0];
  83   prof[profcnt].pr_size = sizeof (bshort[0]);
  84   prof[profcnt].pr_off = 0x80000080;
  85   prof[profcnt].pr_scale = 0x10000;
  86   ++profcnt;
  87
  88   prof[profcnt].pr_base = bshort[1];
  89   prof[profcnt].pr_size = sizeof (bshort[1]);
  90   prof[profcnt].pr_off = 0x80000f80;
  91   prof[profcnt].pr_scale = 0x10000;
  92   ++profcnt;
  93
  94   prof[profcnt].pr_base = bshort[2];
  95   prof[profcnt].pr_size = sizeof (bshort[2]);
  96   prof[profcnt].pr_off = 0x80001080;
  97   prof[profcnt].pr_scale = 0x10000;
  98   ++profcnt;
  99
 100   prof[profcnt].pr_base = bshort[3];
 101   prof[profcnt].pr_size = sizeof (bshort[3]);
 102   prof[profcnt].pr_off = 0x80001f80;
 103   prof[profcnt].pr_scale = 0x10000;
 104   ++profcnt;
 105
 106   prof[profcnt].pr_base = bshort[4];
 107   prof[profcnt].pr_size = sizeof (bshort[4]);
 108   prof[profcnt].pr_off = 0x80002080;
 109   prof[profcnt].pr_scale = 0x10000;
 110   ++profcnt;
 111
 112   prof[profcnt].pr_base = vlong[0];
 113   prof[profcnt].pr_size = sizeof (vlong[0]);
 114   prof[profcnt].pr_off = 0x80000080;
 115   prof[profcnt].pr_scale = 0x10000;
 116   ++profcnt;
 117
 118   /* Set up overflow counter (must be last on Irix).  */
 119   prof[profcnt].pr_base = &ovfl;
 120   prof[profcnt].pr_size = sizeof (ovfl);
 121   prof[profcnt].pr_off = 0;
 122   prof[profcnt].pr_scale = 2;
 123   ++profcnt;
 124
 125   /* Turn it on.  */
 126   if (sprofil (prof, profcnt, &tv, PROF_UINT) < 0)
 127     {
 128       if (errno == ENOSYS)
 129         exit (0);
 130       perror ("sprofil");
 131       exit (1);
 132     }
 133
 134   t_tick = tv.tv_sec + 1e-6 * tv.tv_usec;
 135   printf ("profiling period = %g ms\n", 1e3 * t_tick);
 136
 137   gettimeofday (&start, NULL);
 138   do
 139     {
 140       for (i = 0; i < 21; ++i)
 141         sum += fac (i);
 142
 143       gettimeofday (&tv, NULL);
 144       timersub (&tv, &start, &tv);
 145       delta = tv.tv_sec + 1e-6 * tv.tv_usec;
 146     }
 147   while (delta < 1000 * t_tick);
 148
 149   printf ("sum = 0x%lx\n", sum);
 150
 151   /* Turn it off.  */
 152   if (sprofil (NULL, 0, NULL, 0) < 0)
 153     {
 154       if (errno == ENOSYS)
 155         exit (0);
 156       perror ("sprofil");
 157       exit (1);
 158     }
 159
 160   printf ("overflow = %u\n", ovfl);
 161   for (i = 0; i < NELEMS (taddr); ++i)
 162     for (j = 0; j < 0x10000 / sizeof (int); ++j)
 163       if (buf[i][j] != 0)
 164         printf ("%0*Zx\t%u\t(buffer %d)\n",
 165                 (int) (sizeof (size_t) * 2),
 166                 (taddr[i] + ((char *) &buf[i][j] - (char *) &buf[i][0])),
 167                 buf[i][j], i);
 168
 169   return 0;
 170 }