/* General utility routines for the remote server for GDB.
Copyright (C) 1986, 1989, 1993, 1995-1997, 1999-2000, 2002-2003,
2007-2012 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "server.h"
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#if HAVE_ERRNO_H
#include <errno.h>
#endif
#ifdef IN_PROCESS_AGENT
# define PREFIX "ipa: "
# define TOOLNAME "GDBserver in-process agent"
#else
# define PREFIX "gdbserver: "
# define TOOLNAME "GDBserver"
#endif
/* Generally useful subroutines used throughout the program. */
void
malloc_failure (long size)
{
fprintf (stderr,
PREFIX "ran out of memory while trying to allocate %lu bytes\n",
(unsigned long) size);
exit (1);
}
/* Copy a string into a memory buffer.
If malloc fails, this will print a message to stderr and exit. */
char *
xstrdup (const char *s)
{
char *ret = strdup (s);
if (ret == NULL)
malloc_failure (strlen (s) + 1);
return ret;
}
#ifndef IN_PROCESS_AGENT
/* Free a standard argv vector. */
void
freeargv (char **vector)
{
char **scan;
if (vector != NULL)
{
for (scan = vector; *scan != NULL; scan++)
{
free (*scan);
}
free (vector);
}
}
#endif
/* Print the system error message for errno, and also mention STRING
as the file name for which the error was encountered.
Then return to command level. */
void
perror_with_name (const char *string)
{
const char *err;
char *combined;
err = strerror (errno);
if (err == NULL)
err = "unknown error";
combined = (char *) alloca (strlen (err) + strlen (string) + 3);
strcpy (combined, string);
strcat (combined, ": ");
strcat (combined, err);
error ("%s.", combined);
}
/* Print an error message and return to command level.
STRING is the error message, used as a fprintf string,
and ARG is passed as an argument to it. */
void
error (const char *string,...)
{
#ifndef IN_PROCESS_AGENT
extern jmp_buf toplevel;
#endif
va_list args;
va_start (args, string);
fflush (stdout);
vfprintf (stderr, string, args);
fprintf (stderr, "\n");
#ifndef IN_PROCESS_AGENT
longjmp (toplevel, 1);
#else
exit (1);
#endif
}
/* Print an error message and exit reporting failure.
This is for a error that we cannot continue from.
STRING and ARG are passed to fprintf. */
/* VARARGS */
void
fatal (const char *string,...)
{
va_list args;
va_start (args, string);
fprintf (stderr, PREFIX);
vfprintf (stderr, string, args);
fprintf (stderr, "\n");
va_end (args);
exit (1);
}
/* VARARGS */
void
warning (const char *string,...)
{
va_list args;
va_start (args, string);
fprintf (stderr, PREFIX);
vfprintf (stderr, string, args);
fprintf (stderr, "\n");
va_end (args);
}
/* Report a problem internal to GDBserver, and exit. */
void
internal_error (const char *file, int line, const char *fmt, ...)
{
va_list args;
va_start (args, fmt);
fprintf (stderr, "\
%s:%d: A problem internal to " TOOLNAME " has been detected.\n", file, line);
vfprintf (stderr, fmt, args);
fprintf (stderr, "\n");
va_end (args);
exit (1);
}
/* Temporary storage using circular buffer. */
#define NUMCELLS 10
#define CELLSIZE 50
/* Return the next entry in the circular buffer. */
static char *
get_cell (void)
{
static char buf[NUMCELLS][CELLSIZE];
static int cell = 0;
if (++cell >= NUMCELLS)
cell = 0;
return buf[cell];
}
static char *
decimal2str (char *sign, ULONGEST addr)
{
/* Steal code from valprint.c:print_decimal(). Should this worry
about the real size of addr as the above does? */
unsigned long temp[3];
char *str = get_cell ();
int i = 0;
int width = 9;
do
{
temp[i] = addr % (1000 * 1000 * 1000);
addr /= (1000 * 1000 * 1000);
i++;
}
while (addr != 0 && i < (sizeof (temp) / sizeof (temp[0])));
switch (i)
{
case 1:
xsnprintf (str, CELLSIZE, "%s%0*lu", sign, width, temp[0]);
break;
case 2:
xsnprintf (str, CELLSIZE, "%s%0*lu%09lu", sign, width,
temp[1], temp[0]);
break;
case 3:
xsnprintf (str, CELLSIZE, "%s%0*lu%09lu%09lu", sign, width,
temp[2], temp[1], temp[0]);
break;
default:
internal_error (__FILE__, __LINE__,
"failed internal consistency check");
}
return str;
}
/* %u for ULONGEST. The result is stored in a circular static buffer,
NUMCELLS deep. */
char *
pulongest (ULONGEST u)
{
return decimal2str ("", u);
}
/* %d for LONGEST. The result is stored in a circular static buffer,
NUMCELLS deep. */
char *
plongest (LONGEST l)
{
if (l < 0)
return decimal2str ("-", -l);
else
return decimal2str ("", l);
}
/* Eliminate warning from compiler on 32-bit systems. */
static int thirty_two = 32;
/* Convert a ULONGEST into a HEX string, like %lx. The result is
stored in a circular static buffer, NUMCELLS deep. */
char *
phex_nz (ULONGEST l, int sizeof_l)
{
char *str;
switch (sizeof_l)
{
case 8:
{
unsigned long high = (unsigned long) (l >> thirty_two);
str = get_cell ();
if (high == 0)
xsnprintf (str, CELLSIZE, "%lx",
(unsigned long) (l & 0xffffffff));
else
xsnprintf (str, CELLSIZE, "%lx%08lx", high,
(unsigned long) (l & 0xffffffff));
break;
}
case 4:
str = get_cell ();
xsnprintf (str, CELLSIZE, "%lx", (unsigned long) l);
break;
case 2:
str = get_cell ();
xsnprintf (str, CELLSIZE, "%x", (unsigned short) (l & 0xffff));
break;
default:
str = phex_nz (l, sizeof (l));
break;
}
return str;
}
/* Convert a CORE_ADDR into a HEX string, like %lx.
The result is stored in a circular static buffer, NUMCELLS deep. */
char *
paddress (CORE_ADDR addr)
{
return phex_nz (addr, sizeof (CORE_ADDR));
}
/* Convert a file descriptor into a printable string. */
char *
pfildes (gdb_fildes_t fd)
{
#if USE_WIN32API
return phex_nz (fd, sizeof (gdb_fildes_t));
#else
return plongest (fd);
#endif
}