1 /* Replay a remote debug session logfile for GDB.
2 Copyright (C) 1996 Free Software Foundation, Inc.
3 Written by Fred Fish (fnf@cygnus.com) from pieces of gdbserver.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
24 #include <netinet/in.h>
25 #include <sys/socket.h>
27 #include <netinet/tcp.h>
32 /* Sort of a hack... */
35 static int remote_desc;
37 /* Print the system error message for errno, and also mention STRING
38 as the file name for which the error was encountered.
39 Then return to command level. */
42 perror_with_name (string)
46 extern char *sys_errlist[];
51 err = (errno < sys_nerr) ? sys_errlist[errno] : "unknown error";
52 combined = (char *) alloca (strlen (err) + strlen (string) + 3);
53 strcpy (combined, string);
54 strcat (combined, ": ");
55 strcat (combined, err);
56 fprintf (stderr, "\n%s.\n", combined);
62 sync_error (fp, desc, expect, got)
68 fprintf (stderr, "\n%s\n", desc);
69 fprintf (stderr, "At logfile offset %ld, expected '0x%x' got '0x%x'\n",
70 ftell (fp), expect, got);
81 /* Open a connection to a remote debugger.
82 NAME is the filename used for communication. */
88 extern char *strchr ();
90 if (!strchr (name, ':'))
92 fprintf (stderr, "%s: Must specify tcp connection as host:addr\n", name);
100 struct sockaddr_in sockaddr;
102 struct protoent *protoent;
105 port_str = strchr (name, ':');
107 port = atoi (port_str + 1);
109 tmp_desc = socket (PF_INET, SOCK_STREAM, 0);
111 perror_with_name ("Can't open socket");
113 /* Allow rapid reuse of this port. */
115 setsockopt (tmp_desc, SOL_SOCKET, SO_REUSEADDR, (char *) &tmp,
118 sockaddr.sin_family = PF_INET;
119 sockaddr.sin_port = htons (port);
120 sockaddr.sin_addr.s_addr = INADDR_ANY;
122 if (bind (tmp_desc, (struct sockaddr *) &sockaddr, sizeof (sockaddr))
123 || listen (tmp_desc, 1))
124 perror_with_name ("Can't bind address");
126 tmp = sizeof (sockaddr);
127 remote_desc = accept (tmp_desc, (struct sockaddr *) &sockaddr, &tmp);
128 if (remote_desc == -1)
129 perror_with_name ("Accept failed");
131 protoent = getprotobyname ("tcp");
133 perror_with_name ("getprotobyname");
135 /* Enable TCP keep alive process. */
137 setsockopt (tmp_desc, SOL_SOCKET, SO_KEEPALIVE, (char *) &tmp, sizeof (tmp));
139 /* Tell TCP not to delay small packets. This greatly speeds up
140 interactive response. */
142 setsockopt (remote_desc, protoent->p_proto, TCP_NODELAY,
143 (char *) &tmp, sizeof (tmp));
145 close (tmp_desc); /* No longer need this */
147 signal (SIGPIPE, SIG_IGN); /* If we don't do this, then gdbreplay simply
148 exits when the remote side dies. */
151 fcntl (remote_desc, F_SETFL, FASYNC);
153 fprintf (stderr, "Replay logfile using %s\n", name);
161 if (ch >= '0' && ch <= '9')
165 if (ch >= 'A' && ch <= 'F')
167 return (ch - 'A' + 10);
169 if (ch >= 'a' && ch <= 'f')
171 return (ch - 'a' + 10);
173 fprintf (stderr, "\nInvalid hex digit '%c'\n", ch);
223 ch = tohex (ch2) << 4;
230 /* Treat any other char as just itself */
239 /* Accept input from gdb and match with chars from fp (after skipping one
240 blank) up until a \n is read from fp (which is not matched) */
247 unsigned char fromgdb;
249 if ((fromlog = logchar (fp)) != ' ')
251 sync_error (fp, "Sync error during gdb read of leading blank", ' ',
256 fromlog = logchar (fp);
261 read (remote_desc, &fromgdb, 1);
263 while (fromlog == fromgdb);
266 sync_error (fp, "Sync error during read of gdb packet", fromlog,
271 /* Play data back to gdb from fp (after skipping leading blank) up until a
272 \n is read from fp (which is discarded and not sent to gdb). */
281 if ((fromlog = logchar (fp)) != ' ')
283 sync_error (fp, "Sync error skipping blank during write to gdb", ' ',
286 while ((fromlog = logchar (fp)) != EOL)
289 write (remote_desc, &ch, 1);
303 fprintf (stderr, "Usage: gdbreplay <logfile> <host:port>\n");
307 fp = fopen (argv[1], "r");
310 perror_with_name (argv[1]);
312 remote_open (argv[2]);
313 while ((ch = logchar (fp)) != EOF)
318 /* data sent from gdb to gdbreplay, accept and match it */
322 /* data sent from gdbreplay to gdb, play it */
326 /* Command executed by gdb */
327 while ((ch = logchar (fp)) != EOL);