e92d13d5bc
* server.h (internal_error): Declare. (gdb_assert, ASSERT_FUNCTION, gdb_assert_fail): Define. * utils.c (internal_error): New function.
231 lines
5 KiB
C
231 lines
5 KiB
C
/* General utility routines for the remote server for GDB.
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Copyright (C) 1986, 1989, 1993, 1995, 1996, 1997, 1999, 2000, 2002, 2003,
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2007, 2008, 2009, 2010 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "server.h"
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#if HAVE_ERRNO_H
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#include <errno.h>
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#endif
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#if HAVE_MALLOC_H
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#include <malloc.h>
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#endif
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/* Generally useful subroutines used throughout the program. */
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static void malloc_failure (size_t size) ATTR_NORETURN;
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static void
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malloc_failure (size_t size)
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{
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fprintf (stderr, "gdbserver: ran out of memory while trying to allocate %lu bytes\n",
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(unsigned long) size);
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exit (1);
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}
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/* Allocate memory without fail.
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If malloc fails, this will print a message to stderr and exit. */
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void *
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xmalloc (size_t size)
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{
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void *newmem;
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if (size == 0)
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size = 1;
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newmem = malloc (size);
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if (!newmem)
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malloc_failure (size);
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return newmem;
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}
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/* Allocate memory without fail and set it to zero.
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If malloc fails, this will print a message to stderr and exit. */
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void *
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xcalloc (size_t nelem, size_t elsize)
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{
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void *newmem;
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if (nelem == 0 || elsize == 0)
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nelem = elsize = 1;
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newmem = calloc (nelem, elsize);
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if (!newmem)
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malloc_failure (nelem * elsize);
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return newmem;
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}
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/* Copy a string into a memory buffer.
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If malloc fails, this will print a message to stderr and exit. */
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char *
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xstrdup (const char *s)
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{
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char *ret = strdup (s);
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if (ret == NULL)
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malloc_failure (strlen (s) + 1);
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return ret;
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}
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/* Free a standard argv vector. */
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void
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freeargv (char **vector)
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{
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char **scan;
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if (vector != NULL)
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{
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for (scan = vector; *scan != NULL; scan++)
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{
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free (*scan);
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}
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free (vector);
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}
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}
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/* Print the system error message for errno, and also mention STRING
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as the file name for which the error was encountered.
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Then return to command level. */
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void
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perror_with_name (const char *string)
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{
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const char *err;
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char *combined;
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err = strerror (errno);
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if (err == NULL)
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err = "unknown error";
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combined = (char *) alloca (strlen (err) + strlen (string) + 3);
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strcpy (combined, string);
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strcat (combined, ": ");
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strcat (combined, err);
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error ("%s.", combined);
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}
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/* Print an error message and return to command level.
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STRING is the error message, used as a fprintf string,
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and ARG is passed as an argument to it. */
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void
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error (const char *string,...)
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{
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extern jmp_buf toplevel;
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va_list args;
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va_start (args, string);
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fflush (stdout);
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vfprintf (stderr, string, args);
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fprintf (stderr, "\n");
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longjmp (toplevel, 1);
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}
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/* Print an error message and exit reporting failure.
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This is for a error that we cannot continue from.
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STRING and ARG are passed to fprintf. */
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/* VARARGS */
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void
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fatal (const char *string,...)
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{
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va_list args;
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va_start (args, string);
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fprintf (stderr, "gdbserver: ");
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vfprintf (stderr, string, args);
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fprintf (stderr, "\n");
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va_end (args);
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exit (1);
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}
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/* VARARGS */
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void
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warning (const char *string,...)
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{
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va_list args;
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va_start (args, string);
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fprintf (stderr, "gdbserver: ");
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vfprintf (stderr, string, args);
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fprintf (stderr, "\n");
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va_end (args);
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}
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/* Report a problem internal to GDBserver, and exit. */
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void
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internal_error (const char *file, int line, const char *fmt, ...)
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{
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va_list args;
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va_start (args, fmt);
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fprintf (stderr, "\
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%s:%d: A problem internal to GDBserver has been detected.\n", file, line);
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vfprintf (stderr, fmt, args);
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fprintf (stderr, "\n");
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va_end (args);
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exit (1);
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}
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/* Temporary storage using circular buffer. */
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#define NUMCELLS 4
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#define CELLSIZE 50
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/* Return the next entry in the circular buffer. */
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static char *
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get_cell (void)
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{
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static char buf[NUMCELLS][CELLSIZE];
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static int cell = 0;
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if (++cell >= NUMCELLS)
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cell = 0;
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return buf[cell];
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}
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/* Stdarg wrapper around vsnprintf.
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SIZE is the size of the buffer pointed to by STR. */
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static int
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xsnprintf (char *str, size_t size, const char *format, ...)
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{
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va_list args;
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int ret;
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va_start (args, format);
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ret = vsnprintf (str, size, format, args);
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va_end (args);
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return ret;
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}
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/* Convert a CORE_ADDR into a HEX string, like %lx.
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The result is stored in a circular static buffer, NUMCELLS deep. */
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char *
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paddress (CORE_ADDR addr)
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{
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char *str = get_cell ();
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xsnprintf (str, CELLSIZE, "%lx", (long) addr);
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return str;
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}
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