/* Replay a remote debug session logfile for GDB.
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/* Replay a remote debug session logfile for GDB.
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Copyright (C) 1996 Free Software Foundation, Inc.
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Copyright (C) 1996 Free Software Foundation, Inc.
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Written by Fred Fish (fnf@cygnus.com) from pieces of gdbserver.
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Written by Fred Fish (fnf@cygnus.com) from pieces of gdbserver.
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This file is part of GDB.
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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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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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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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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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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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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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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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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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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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Boston, MA 02111-1307, USA. */
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#include "config.h"
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#include "config.h"
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#include <stdio.h>
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#include <stdio.h>
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#include <sys/file.h>
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#include <sys/file.h>
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#include <netinet/in.h>
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#include <netinet/in.h>
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#include <sys/socket.h>
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#include <sys/socket.h>
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#include <netdb.h>
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#include <netdb.h>
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#include <netinet/tcp.h>
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#include <netinet/tcp.h>
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#include <signal.h>
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#include <signal.h>
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#include <ctype.h>
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#include <ctype.h>
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#include <fcntl.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <errno.h>
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/* Sort of a hack... */
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/* Sort of a hack... */
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#define EOL (EOF - 1)
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#define EOL (EOF - 1)
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static int remote_desc;
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static int remote_desc;
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/* Print the system error message for errno, and also mention STRING
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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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as the file name for which the error was encountered.
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Then return to command level. */
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Then return to command level. */
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void
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void
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perror_with_name (string)
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perror_with_name (string)
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char *string;
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char *string;
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{
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{
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#ifndef STDC_HEADERS
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#ifndef STDC_HEADERS
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extern int sys_nerr;
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extern int sys_nerr;
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extern char *sys_errlist[];
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extern char *sys_errlist[];
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extern int errno;
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extern int errno;
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#endif
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#endif
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const char *err;
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const char *err;
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char *combined;
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char *combined;
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err = (errno < sys_nerr) ? sys_errlist[errno] : "unknown error";
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err = (errno < sys_nerr) ? sys_errlist[errno] : "unknown error";
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combined = (char *) alloca (strlen (err) + strlen (string) + 3);
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combined = (char *) alloca (strlen (err) + strlen (string) + 3);
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strcpy (combined, string);
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strcpy (combined, string);
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strcat (combined, ": ");
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strcat (combined, ": ");
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strcat (combined, err);
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strcat (combined, err);
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fprintf (stderr, "\n%s.\n", combined);
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fprintf (stderr, "\n%s.\n", combined);
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fflush (stderr);
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fflush (stderr);
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exit (1);
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exit (1);
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}
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}
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static void
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static void
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sync_error (fp, desc, expect, got)
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sync_error (fp, desc, expect, got)
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FILE *fp;
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FILE *fp;
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char *desc;
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char *desc;
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int expect;
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int expect;
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int got;
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int got;
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{
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{
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fprintf (stderr, "\n%s\n", desc);
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fprintf (stderr, "\n%s\n", desc);
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fprintf (stderr, "At logfile offset %ld, expected '0x%x' got '0x%x'\n",
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fprintf (stderr, "At logfile offset %ld, expected '0x%x' got '0x%x'\n",
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ftell (fp), expect, got);
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ftell (fp), expect, got);
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fflush (stderr);
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fflush (stderr);
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exit (1);
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exit (1);
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}
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}
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void
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void
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remote_close ()
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remote_close ()
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{
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{
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close (remote_desc);
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close (remote_desc);
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}
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}
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/* Open a connection to a remote debugger.
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/* Open a connection to a remote debugger.
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NAME is the filename used for communication. */
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NAME is the filename used for communication. */
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void
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void
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remote_open (name)
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remote_open (name)
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char *name;
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char *name;
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{
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{
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extern char *strchr ();
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extern char *strchr ();
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if (!strchr (name, ':'))
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if (!strchr (name, ':'))
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{
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{
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fprintf (stderr, "%s: Must specify tcp connection as host:addr\n", name);
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fprintf (stderr, "%s: Must specify tcp connection as host:addr\n", name);
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fflush (stderr);
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fflush (stderr);
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exit (1);
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exit (1);
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}
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}
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else
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else
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{
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{
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char *port_str;
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char *port_str;
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int port;
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int port;
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struct sockaddr_in sockaddr;
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struct sockaddr_in sockaddr;
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int tmp;
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int tmp;
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struct protoent *protoent;
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struct protoent *protoent;
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int tmp_desc;
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int tmp_desc;
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port_str = strchr (name, ':');
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port_str = strchr (name, ':');
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port = atoi (port_str + 1);
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port = atoi (port_str + 1);
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tmp_desc = socket (PF_INET, SOCK_STREAM, 0);
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tmp_desc = socket (PF_INET, SOCK_STREAM, 0);
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if (tmp_desc < 0)
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if (tmp_desc < 0)
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perror_with_name ("Can't open socket");
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perror_with_name ("Can't open socket");
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/* Allow rapid reuse of this port. */
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/* Allow rapid reuse of this port. */
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tmp = 1;
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tmp = 1;
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setsockopt (tmp_desc, SOL_SOCKET, SO_REUSEADDR, (char *) &tmp,
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setsockopt (tmp_desc, SOL_SOCKET, SO_REUSEADDR, (char *) &tmp,
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sizeof (tmp));
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sizeof (tmp));
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sockaddr.sin_family = PF_INET;
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sockaddr.sin_family = PF_INET;
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sockaddr.sin_port = htons (port);
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sockaddr.sin_port = htons (port);
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sockaddr.sin_addr.s_addr = INADDR_ANY;
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sockaddr.sin_addr.s_addr = INADDR_ANY;
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if (bind (tmp_desc, (struct sockaddr *) &sockaddr, sizeof (sockaddr))
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if (bind (tmp_desc, (struct sockaddr *) &sockaddr, sizeof (sockaddr))
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|| listen (tmp_desc, 1))
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|| listen (tmp_desc, 1))
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perror_with_name ("Can't bind address");
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perror_with_name ("Can't bind address");
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tmp = sizeof (sockaddr);
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tmp = sizeof (sockaddr);
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remote_desc = accept (tmp_desc, (struct sockaddr *) &sockaddr, &tmp);
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remote_desc = accept (tmp_desc, (struct sockaddr *) &sockaddr, &tmp);
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if (remote_desc == -1)
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if (remote_desc == -1)
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perror_with_name ("Accept failed");
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perror_with_name ("Accept failed");
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protoent = getprotobyname ("tcp");
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protoent = getprotobyname ("tcp");
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if (!protoent)
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if (!protoent)
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perror_with_name ("getprotobyname");
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perror_with_name ("getprotobyname");
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/* Enable TCP keep alive process. */
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/* Enable TCP keep alive process. */
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tmp = 1;
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tmp = 1;
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setsockopt (tmp_desc, SOL_SOCKET, SO_KEEPALIVE, (char *) &tmp, sizeof (tmp));
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setsockopt (tmp_desc, SOL_SOCKET, SO_KEEPALIVE, (char *) &tmp, sizeof (tmp));
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/* Tell TCP not to delay small packets. This greatly speeds up
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/* Tell TCP not to delay small packets. This greatly speeds up
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interactive response. */
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interactive response. */
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tmp = 1;
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tmp = 1;
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setsockopt (remote_desc, protoent->p_proto, TCP_NODELAY,
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setsockopt (remote_desc, protoent->p_proto, TCP_NODELAY,
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(char *) &tmp, sizeof (tmp));
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(char *) &tmp, sizeof (tmp));
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close (tmp_desc); /* No longer need this */
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close (tmp_desc); /* No longer need this */
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signal (SIGPIPE, SIG_IGN); /* If we don't do this, then gdbreplay simply
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signal (SIGPIPE, SIG_IGN); /* If we don't do this, then gdbreplay simply
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exits when the remote side dies. */
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exits when the remote side dies. */
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}
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}
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fcntl (remote_desc, F_SETFL, FASYNC);
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fcntl (remote_desc, F_SETFL, FASYNC);
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fprintf (stderr, "Replay logfile using %s\n", name);
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fprintf (stderr, "Replay logfile using %s\n", name);
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fflush (stderr);
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fflush (stderr);
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}
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}
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static int
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static int
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tohex (ch)
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tohex (ch)
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int ch;
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int ch;
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{
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{
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if (ch >= '0' && ch <= '9')
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if (ch >= '0' && ch <= '9')
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{
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{
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return (ch - '0');
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return (ch - '0');
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}
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}
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if (ch >= 'A' && ch <= 'F')
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if (ch >= 'A' && ch <= 'F')
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{
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{
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return (ch - 'A' + 10);
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return (ch - 'A' + 10);
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}
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}
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if (ch >= 'a' && ch <= 'f')
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if (ch >= 'a' && ch <= 'f')
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{
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{
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return (ch - 'a' + 10);
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return (ch - 'a' + 10);
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}
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}
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fprintf (stderr, "\nInvalid hex digit '%c'\n", ch);
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fprintf (stderr, "\nInvalid hex digit '%c'\n", ch);
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fflush (stderr);
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fflush (stderr);
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exit (1);
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exit (1);
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}
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}
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static int
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static int
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logchar (fp)
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logchar (fp)
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FILE *fp;
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FILE *fp;
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{
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{
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int ch;
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int ch;
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int ch2;
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int ch2;
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ch = fgetc (fp);
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ch = fgetc (fp);
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fputc (ch, stdout);
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fputc (ch, stdout);
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fflush (stdout);
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fflush (stdout);
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switch (ch)
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switch (ch)
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{
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{
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case '\n':
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case '\n':
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ch = EOL;
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ch = EOL;
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break;
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break;
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case '\\':
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case '\\':
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ch = fgetc (fp);
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ch = fgetc (fp);
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fputc (ch, stdout);
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fputc (ch, stdout);
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fflush (stdout);
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fflush (stdout);
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switch (ch)
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switch (ch)
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{
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{
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case '\\':
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case '\\':
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break;
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break;
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case 'b':
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case 'b':
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ch = '\b';
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ch = '\b';
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break;
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break;
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case 'f':
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case 'f':
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ch = '\f';
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ch = '\f';
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break;
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break;
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case 'n':
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case 'n':
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ch = '\n';
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ch = '\n';
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break;
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break;
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case 'r':
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case 'r':
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ch = '\r';
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ch = '\r';
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break;
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break;
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case 't':
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case 't':
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ch = '\t';
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ch = '\t';
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break;
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break;
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case 'v':
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case 'v':
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ch = '\v';
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ch = '\v';
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break;
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break;
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case 'x':
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case 'x':
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ch2 = fgetc (fp);
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ch2 = fgetc (fp);
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fputc (ch2, stdout);
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fputc (ch2, stdout);
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fflush (stdout);
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fflush (stdout);
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ch = tohex (ch2) << 4;
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ch = tohex (ch2) << 4;
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ch2 = fgetc (fp);
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ch2 = fgetc (fp);
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fputc (ch2, stdout);
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fputc (ch2, stdout);
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fflush (stdout);
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fflush (stdout);
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ch |= tohex (ch2);
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ch |= tohex (ch2);
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break;
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break;
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default:
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default:
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/* Treat any other char as just itself */
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/* Treat any other char as just itself */
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break;
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break;
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}
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}
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default:
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default:
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break;
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break;
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}
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}
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return (ch);
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return (ch);
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}
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}
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/* Accept input from gdb and match with chars from fp (after skipping one
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/* Accept input from gdb and match with chars from fp (after skipping one
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blank) up until a \n is read from fp (which is not matched) */
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blank) up until a \n is read from fp (which is not matched) */
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void
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void
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expect (fp)
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expect (fp)
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FILE *fp;
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FILE *fp;
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{
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{
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int fromlog;
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int fromlog;
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unsigned char fromgdb;
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unsigned char fromgdb;
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if ((fromlog = logchar (fp)) != ' ')
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if ((fromlog = logchar (fp)) != ' ')
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{
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{
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sync_error (fp, "Sync error during gdb read of leading blank", ' ',
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sync_error (fp, "Sync error during gdb read of leading blank", ' ',
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fromlog);
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fromlog);
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}
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}
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do
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do
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{
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{
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fromlog = logchar (fp);
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fromlog = logchar (fp);
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if (fromlog == EOL)
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if (fromlog == EOL)
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{
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{
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break;
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break;
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}
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}
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read (remote_desc, &fromgdb, 1);
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read (remote_desc, &fromgdb, 1);
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}
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}
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while (fromlog == fromgdb);
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while (fromlog == fromgdb);
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if (fromlog != EOL)
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if (fromlog != EOL)
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{
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{
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sync_error (fp, "Sync error during read of gdb packet", fromlog,
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sync_error (fp, "Sync error during read of gdb packet", fromlog,
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fromgdb);
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fromgdb);
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}
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}
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}
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}
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/* Play data back to gdb from fp (after skipping leading blank) up until a
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/* Play data back to gdb from fp (after skipping leading blank) up until a
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\n is read from fp (which is discarded and not sent to gdb). */
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\n is read from fp (which is discarded and not sent to gdb). */
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void
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void
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play (fp)
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play (fp)
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FILE *fp;
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FILE *fp;
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{
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{
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int fromlog;
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int fromlog;
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char ch;
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char ch;
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|
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if ((fromlog = logchar (fp)) != ' ')
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if ((fromlog = logchar (fp)) != ' ')
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{
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{
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sync_error (fp, "Sync error skipping blank during write to gdb", ' ',
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sync_error (fp, "Sync error skipping blank during write to gdb", ' ',
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fromlog);
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fromlog);
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}
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}
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while ((fromlog = logchar (fp)) != EOL)
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while ((fromlog = logchar (fp)) != EOL)
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{
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{
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ch = fromlog;
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ch = fromlog;
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write (remote_desc, &ch, 1);
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write (remote_desc, &ch, 1);
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}
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}
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}
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}
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int
|
int
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main (argc, argv)
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main (argc, argv)
|
int argc;
|
int argc;
|
char *argv[];
|
char *argv[];
|
{
|
{
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FILE *fp;
|
FILE *fp;
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int ch;
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int ch;
|
|
|
if (argc < 3)
|
if (argc < 3)
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{
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{
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fprintf (stderr, "Usage: gdbreplay <logfile> <host:port>\n");
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fprintf (stderr, "Usage: gdbreplay <logfile> <host:port>\n");
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fflush (stderr);
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fflush (stderr);
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exit (1);
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exit (1);
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}
|
}
|
fp = fopen (argv[1], "r");
|
fp = fopen (argv[1], "r");
|
if (fp == NULL)
|
if (fp == NULL)
|
{
|
{
|
perror_with_name (argv[1]);
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perror_with_name (argv[1]);
|
}
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}
|
remote_open (argv[2]);
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remote_open (argv[2]);
|
while ((ch = logchar (fp)) != EOF)
|
while ((ch = logchar (fp)) != EOF)
|
{
|
{
|
switch (ch)
|
switch (ch)
|
{
|
{
|
case 'w':
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case 'w':
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/* data sent from gdb to gdbreplay, accept and match it */
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/* data sent from gdb to gdbreplay, accept and match it */
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expect (fp);
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expect (fp);
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break;
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break;
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case 'r':
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case 'r':
|
/* data sent from gdbreplay to gdb, play it */
|
/* data sent from gdbreplay to gdb, play it */
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play (fp);
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play (fp);
|
break;
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break;
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case 'c':
|
case 'c':
|
/* Command executed by gdb */
|
/* Command executed by gdb */
|
while ((ch = logchar (fp)) != EOL);
|
while ((ch = logchar (fp)) != EOL);
|
break;
|
break;
|
}
|
}
|
}
|
}
|
remote_close ();
|
remote_close ();
|
exit (0);
|
exit (0);
|
}
|
}
|
|
|
