1 /* Replay a remote debug session logfile for GDB.
2 Copyright 1996, 1998, 1999, 2000, 2002, 2003 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. */
25 #include <netinet/in.h>
26 #include <sys/socket.h>
28 #include <netinet/tcp.h>
44 /* Sort of a hack... */
47 static int remote_desc;
49 /* Print the system error message for errno, and also mention STRING
50 as the file name for which the error was encountered.
51 Then return to command level. */
54 perror_with_name (char *string)
62 err = strerror (errno);
64 err = "unknown error";
66 combined = (char *) alloca (strlen (err) + strlen (string) + 3);
67 strcpy (combined, string);
68 strcat (combined, ": ");
69 strcat (combined, err);
70 fprintf (stderr, "\n%s.\n", combined);
76 sync_error (FILE *fp, char *desc, int expect, int got)
78 fprintf (stderr, "\n%s\n", desc);
79 fprintf (stderr, "At logfile offset %ld, expected '0x%x' got '0x%x'\n",
80 ftell (fp), expect, got);
91 /* Open a connection to a remote debugger.
92 NAME is the filename used for communication. */
95 remote_open (char *name)
97 if (!strchr (name, ':'))
99 fprintf (stderr, "%s: Must specify tcp connection as host:addr\n", name);
107 struct sockaddr_in sockaddr;
111 port_str = strchr (name, ':');
113 port = atoi (port_str + 1);
115 tmp_desc = socket (PF_INET, SOCK_STREAM, 0);
117 perror_with_name ("Can't open socket");
119 /* Allow rapid reuse of this port. */
121 setsockopt (tmp_desc, SOL_SOCKET, SO_REUSEADDR, (char *) &tmp,
124 sockaddr.sin_family = PF_INET;
125 sockaddr.sin_port = htons (port);
126 sockaddr.sin_addr.s_addr = INADDR_ANY;
128 if (bind (tmp_desc, (struct sockaddr *) &sockaddr, sizeof (sockaddr))
129 || listen (tmp_desc, 1))
130 perror_with_name ("Can't bind address");
132 tmp = sizeof (sockaddr);
133 remote_desc = accept (tmp_desc, (struct sockaddr *) &sockaddr, &tmp);
134 if (remote_desc == -1)
135 perror_with_name ("Accept failed");
137 /* Enable TCP keep alive process. */
139 setsockopt (tmp_desc, SOL_SOCKET, SO_KEEPALIVE, (char *) &tmp, sizeof (tmp));
141 /* Tell TCP not to delay small packets. This greatly speeds up
142 interactive response. */
144 setsockopt (remote_desc, IPPROTO_TCP, TCP_NODELAY,
145 (char *) &tmp, sizeof (tmp));
147 close (tmp_desc); /* No longer need this */
149 signal (SIGPIPE, SIG_IGN); /* If we don't do this, then gdbreplay simply
150 exits when the remote side dies. */
153 fcntl (remote_desc, F_SETFL, FASYNC);
155 fprintf (stderr, "Replay logfile using %s\n", name);
162 if (ch >= '0' && ch <= '9')
166 if (ch >= 'A' && ch <= 'F')
168 return (ch - 'A' + 10);
170 if (ch >= 'a' && ch <= 'f')
172 return (ch - 'a' + 10);
174 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) */
246 unsigned char fromgdb;
248 if ((fromlog = logchar (fp)) != ' ')
250 sync_error (fp, "Sync error during gdb read of leading blank", ' ',
255 fromlog = logchar (fp);
260 read (remote_desc, &fromgdb, 1);
262 while (fromlog == fromgdb);
265 sync_error (fp, "Sync error during read of gdb packet", fromlog,
270 /* Play data back to gdb from fp (after skipping leading blank) up until a
271 \n is read from fp (which is discarded and not sent to gdb). */
279 if ((fromlog = logchar (fp)) != ' ')
281 sync_error (fp, "Sync error skipping blank during write to gdb", ' ',
284 while ((fromlog = logchar (fp)) != EOL)
287 write (remote_desc, &ch, 1);
292 main (int argc, char *argv[])
299 fprintf (stderr, "Usage: gdbreplay <logfile> <host:port>\n");
303 fp = fopen (argv[1], "r");
306 perror_with_name (argv[1]);
308 remote_open (argv[2]);
309 while ((ch = logchar (fp)) != EOF)
314 /* data sent from gdb to gdbreplay, accept and match it */
318 /* data sent from gdbreplay to gdb, play it */
322 /* Command executed by gdb */
323 while ((ch = logchar (fp)) != EOL);