File: pcprofiledump.c

package info (click to toggle)
glibc 2.19-18+deb8u4
  • links: PTS, VCS
  • area: main
  • in suites: jessie, jessie-backports
  • size: 204,416 kB
  • ctags: 144,800
  • sloc: ansic: 970,361; asm: 241,207; sh: 10,069; makefile: 8,475; cpp: 3,595; perl: 2,077; pascal: 1,839; awk: 1,704; yacc: 317; sed: 73
file content (231 lines) | stat: -rw-r--r-- 5,868 bytes parent folder | download | duplicates (10)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
/* Dump information generated by PC profiling.
   Copyright (C) 1999-2014 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

/* This is mainly an example.  It shows how programs which want to use
   the information should read the file.  */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif

#include <argp.h>
#include <byteswap.h>
#include <errno.h>
#include <error.h>
#include <fcntl.h>
#include <inttypes.h>
#include <libintl.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <stdint.h>

#include "../version.h"

#define PACKAGE _libc_intl_domainname

#ifndef _
# define _(Str) gettext (Str)
#endif

#ifndef N_
# define N_(Str) Str
#endif

/* Definitions of arguments for argp functions.  */
static const struct argp_option options[] =
{
  { "unbuffered", 'u', NULL, 0, N_("Don't buffer output") },
  { NULL, 0, NULL, 0, NULL }
};

/* Short description of program.  */
static const char doc[] = N_("Dump information generated by PC profiling.");

/* Strings for arguments in help texts.  */
static const char args_doc[] = N_("[FILE]");

/* Function to print some extra text in the help message.  */
static char *more_help (int key, const char *text, void *input);

/* Prototype for option handler.  */
static error_t parse_opt (int key, char *arg, struct argp_state *state);

/* Name and version of program.  */
static void print_version (FILE *stream, struct argp_state *state);
void (*argp_program_version_hook) (FILE *, struct argp_state *) = print_version;

/* Data structure to communicate with argp functions.  */
static struct argp argp =
{
  options, parse_opt, args_doc, doc, NULL, more_help
};


int
main (int argc, char *argv[])
{
  /* Set locale via LC_ALL.  */
  setlocale (LC_ALL, "");

  /* Set the text message domain.  */
  textdomain (PACKAGE);

  /* Parse and process arguments.  */
  int remaining;
  argp_parse (&argp, argc, argv, 0, &remaining, NULL);

  int fd;
  if (remaining == argc)
    fd = STDIN_FILENO;
  else if (remaining + 1 != argc)
    {
      argp_help (&argp, stdout, ARGP_HELP_SEE | ARGP_HELP_EXIT_ERR,
		 program_invocation_short_name);
      exit (1);
    }
  else
    {
      /* Open the given file.  */
      fd = open (argv[remaining], O_RDONLY);

      if (fd == -1)
	error (EXIT_FAILURE, errno, _("cannot open input file"));
    }

  /* Read the first 4-byte word.  It contains the information about
     the word size and the endianess.  */
  uint32_t word;
  if (TEMP_FAILURE_RETRY (read (fd, &word, 4)) != 4)
    error (EXIT_FAILURE, errno, _("cannot read header"));

  /* Check whether we have to swap the byte order.  */
  int must_swap = (word & 0xfffffff0) == bswap_32 (0xdeb00000);
  if (must_swap)
    word = bswap_32 (word);

  /* We have two loops, one for 32 bit pointers, one for 64 bit pointers.  */
  if (word == 0xdeb00004)
    {
      union
      {
	uint32_t ptrs[2];
	char bytes[8];
      } pair;

      while (1)
	{
	  size_t len = sizeof (pair);
	  size_t n;

	  while (len > 0
		 && (n = TEMP_FAILURE_RETRY (read (fd, &pair.bytes[8 - len],
						   len))) != 0)
	    len -= n;

	  if (len != 0)
	    /* Nothing to read.  */
	    break;

	  printf ("this = %#010" PRIx32 ", caller = %#010" PRIx32 "\n",
		  must_swap ? bswap_32 (pair.ptrs[0]) : pair.ptrs[0],
		  must_swap ? bswap_32 (pair.ptrs[1]) : pair.ptrs[1]);
	}
    }
  else if (word == 0xdeb00008)
    {
      union
      {
	uint64_t ptrs[2];
	char bytes[16];
      } pair;

      while (1)
	{
	  size_t len = sizeof (pair);
	  size_t n;

	  while (len > 0
		 && (n = TEMP_FAILURE_RETRY (read (fd, &pair.bytes[8 - len],
						   len))) != 0)
	    len -= n;

	  if (len != 0)
	    /* Nothing to read.  */
	    break;

	  printf ("this = %#018" PRIx64 ", caller = %#018" PRIx64 "\n",
		  must_swap ? bswap_64 (pair.ptrs[0]) : pair.ptrs[0],
		  must_swap ? bswap_64 (pair.ptrs[1]) : pair.ptrs[1]);
	}
    }
  else
    /* This should not happen.  */
    error (EXIT_FAILURE, 0, _("invalid pointer size"));

  /* Clean up.  */
  close (fd);

  return 0;
}

static error_t
parse_opt (int key, char *arg, struct argp_state *state)
{
  switch (key)
    {
    case 'u':
      setbuf (stdout, NULL);
      break;
    default:
      return ARGP_ERR_UNKNOWN;
    }
  return 0;
}

static char *
more_help (int key, const char *text, void *input)
{
  char *tp = NULL;
  switch (key)
    {
    case ARGP_KEY_HELP_EXTRA:
      /* We print some extra information.  */
      if (asprintf (&tp, gettext ("\
For bug reporting instructions, please see:\n\
%s.\n"), REPORT_BUGS_TO) < 0)
	return NULL;
      return tp;
    default:
      break;
    }
  return (char *) text;
}

/* Print the version information.  */
static void
print_version (FILE *stream, struct argp_state *state)
{
  fprintf (stream, "pcprofiledump %s%s\n", PKGVERSION, VERSION);
  fprintf (stream, gettext ("\
Copyright (C) %s Free Software Foundation, Inc.\n\
This is free software; see the source for copying conditions.  There is NO\n\
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\
"), "2014");
  fprintf (stream, gettext ("Written by %s.\n"), "Ulrich Drepper");
}