summaryrefslogtreecommitdiff
path: root/debug/pcprofiledump.c
blob: a5dad71e0a7c0ebae6e9e0be357e003c08d8e9ea (plain)
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
/* Dump information generated by PC profiling.
   Copyright (C) 1999 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 Library General Public License as
   published by the Free Software Foundation; either version 2 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
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the GNU C Library; see the file COPYING.LIB.  If not,
   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

/* This is mainly and 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 "../version.h"


#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[] =
{
  { 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);

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


int
main (int argc, char *argv[])
{
  int fd;
  int remaining;
  int must_swap;
  uint32_t word;

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

  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.  */
  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.  */
  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 char *
more_help (int key, const char *text, void *input)
{
  switch (key)
    {
    case ARGP_KEY_HELP_EXTRA:
      /* We print some extra information.  */
      return strdup (gettext ("\
Report bugs using the `glibcbug' script to <bugs@gnu.org>.\n"));
    default:
      break;
    }
  return (char *) text;
}