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/* Dump information generated by PC profiling.
Copyright (C) 1999-2022 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
<https://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 & 0x0fffffff) == 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\
"), "2022");
fprintf (stream, gettext ("Written by %s.\n"), "Ulrich Drepper");
}
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