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
);
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