1/* Copyright (C) 2001-2022 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
27size_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
44unsigned int buf[NELEMS (taddr)][0x10000 / sizeof (int)];
45unsigned int bshort[5][0x100 / sizeof (int)];
46unsigned int blong[1][0x1000 / sizeof (int)];
47unsigned int vlong[1][0x2000 / sizeof (int)];
48
49static long int
50fac (long int n)
51{
52 if (n == 0)
53 return 1;
54 return n * fac (n: n - 1);
55}
56
57int
58main (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 (profp: prof, profcnt: profcnt, tvp: &tv, flags: 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 (format: "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 (n: 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 (format: "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 (format: "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}
171

source code of glibc/gmon/tst-sprofil.c