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glibc/debug/pcprofiledump.c
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/* Dump information generated by PC profiling. | |
Copyright (C) 1999, 2002 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, write to the Free | |
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
02111-1307 USA. */ | |
/* 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 "../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[] = | |
{ | |
{ "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); | |
/* 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[]) | |
{ | |
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 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) | |
{ | |
switch (key) | |
{ | |
case ARGP_KEY_HELP_EXTRA: | |
/* We print some extra information. */ | |
return strdup (gettext ("\ | |
For bug reporting instructions, please see:\n\ | |
<http://www.gnu.org/software/libc/bugs.html>.\n")); | |
default: | |
break; | |
} | |
return (char *) text; | |
} |