* bits/types.h: Don't include stddef.h, don't define __need_size_t.
[glibc.git] / debug / pcprofiledump.c
blob210e5089e9c572c51c7e8175af842e8b8765f92d
1 /* Dump information generated by PC profiling.
2 Copyright (C) 1999, 2002 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, write to the Free
18 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
19 02111-1307 USA. */
21 /* This is mainly an example. It shows how programs which want to use
22 the information should read the file. */
23 #ifdef HAVE_CONFIG_H
24 # include <config.h>
25 #endif
27 #include <argp.h>
28 #include <byteswap.h>
29 #include <errno.h>
30 #include <error.h>
31 #include <fcntl.h>
32 #include <inttypes.h>
33 #include <libintl.h>
34 #include <stdlib.h>
35 #include <string.h>
36 #include <unistd.h>
38 #include "../version.h"
41 #ifndef _
42 # define _(Str) gettext (Str)
43 #endif
45 #ifndef N_
46 # define N_(Str) Str
47 #endif
49 /* Definitions of arguments for argp functions. */
50 static const struct argp_option options[] =
52 { "unbuffered", 'u', NULL, 0, N_("Don't buffer output") },
53 { NULL, 0, NULL, 0, NULL }
56 /* Short description of program. */
57 static const char doc[] = N_("Dump information generated by PC profiling.");
59 /* Strings for arguments in help texts. */
60 static const char args_doc[] = N_("[FILE]");
62 /* Function to print some extra text in the help message. */
63 static char *more_help (int key, const char *text, void *input);
65 /* Prototype for option handler. */
66 static error_t parse_opt (int key, char *arg, struct argp_state *state);
68 /* Data structure to communicate with argp functions. */
69 static struct argp argp =
71 options, parse_opt, args_doc, doc, NULL, more_help
75 int
76 main (int argc, char *argv[])
78 int fd;
79 int remaining;
80 int must_swap;
81 uint32_t word;
83 /* Parse and process arguments. */
84 argp_parse (&argp, argc, argv, 0, &remaining, NULL);
86 if (remaining == argc)
87 fd = STDIN_FILENO;
88 else if (remaining + 1 != argc)
90 argp_help (&argp, stdout, ARGP_HELP_SEE | ARGP_HELP_EXIT_ERR,
91 program_invocation_short_name);
92 exit (1);
94 else
96 /* Open the given file. */
97 fd = open (argv[remaining], O_RDONLY);
99 if (fd == -1)
100 error (EXIT_FAILURE, errno, _("cannot open input file"));
103 /* Read the first 4-byte word. It contains the information about
104 the word size and the endianess. */
105 if (TEMP_FAILURE_RETRY (read (fd, &word, 4)) != 4)
106 error (EXIT_FAILURE, errno, _("cannot read header"));
108 /* Check whether we have to swap the byte order. */
109 must_swap = (word & 0xfffffff0) == bswap_32 (0xdeb00000);
110 if (must_swap)
111 word = bswap_32 (word);
113 /* We have two loops, one for 32 bit pointers, one for 64 bit pointers. */
114 if (word == 0xdeb00004)
116 union
118 uint32_t ptrs[2];
119 char bytes[8];
120 } pair;
122 while (1)
124 size_t len = sizeof (pair);
125 size_t n;
127 while (len > 0
128 && (n = TEMP_FAILURE_RETRY (read (fd, &pair.bytes[8 - len],
129 len))) != 0)
130 len -= n;
132 if (len != 0)
133 /* Nothing to read. */
134 break;
136 printf ("this = %#010" PRIx32 ", caller = %#010" PRIx32 "\n",
137 must_swap ? bswap_32 (pair.ptrs[0]) : pair.ptrs[0],
138 must_swap ? bswap_32 (pair.ptrs[1]) : pair.ptrs[1]);
141 else if (word == 0xdeb00008)
143 union
145 uint64_t ptrs[2];
146 char bytes[16];
147 } pair;
149 while (1)
151 size_t len = sizeof (pair);
152 size_t n;
154 while (len > 0
155 && (n = TEMP_FAILURE_RETRY (read (fd, &pair.bytes[8 - len],
156 len))) != 0)
157 len -= n;
159 if (len != 0)
160 /* Nothing to read. */
161 break;
163 printf ("this = %#018" PRIx64 ", caller = %#018" PRIx64 "\n",
164 must_swap ? bswap_64 (pair.ptrs[0]) : pair.ptrs[0],
165 must_swap ? bswap_64 (pair.ptrs[1]) : pair.ptrs[1]);
168 else
169 /* This should not happen. */
170 error (EXIT_FAILURE, 0, _("invalid pointer size"));
172 /* Clean up. */
173 close (fd);
175 return 0;
178 static error_t
179 parse_opt (int key, char *arg, struct argp_state *state)
181 switch (key)
183 case 'u':
184 setbuf (stdout, NULL);
185 break;
186 default:
187 return ARGP_ERR_UNKNOWN;
189 return 0;
192 static char *
193 more_help (int key, const char *text, void *input)
195 switch (key)
197 case ARGP_KEY_HELP_EXTRA:
198 /* We print some extra information. */
199 return strdup (gettext ("\
200 For bug reporting instructions, please see:\n\
201 <http://www.gnu.org/software/libc/bugs.html>.\n"));
202 default:
203 break;
205 return (char *) text;