1 /* Replay a remote debug session logfile for GDB.
2 Copyright 1996, 1998, 1999, 2000 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>
34 /* Sort of a hack... */
37 static int remote_desc
;
39 /* Print the system error message for errno, and also mention STRING
40 as the file name for which the error was encountered.
41 Then return to command level. */
44 perror_with_name (char *string
)
48 extern char *sys_errlist
[];
54 err
= (errno
< sys_nerr
) ? sys_errlist
[errno
] : "unknown error";
55 combined
= (char *) alloca (strlen (err
) + strlen (string
) + 3);
56 strcpy (combined
, string
);
57 strcat (combined
, ": ");
58 strcat (combined
, err
);
59 fprintf (stderr
, "\n%s.\n", combined
);
65 sync_error (FILE *fp
, char *desc
, int expect
, int got
)
67 fprintf (stderr
, "\n%s\n", desc
);
68 fprintf (stderr
, "At logfile offset %ld, expected '0x%x' got '0x%x'\n",
69 ftell (fp
), expect
, got
);
80 /* Open a connection to a remote debugger.
81 NAME is the filename used for communication. */
84 remote_open (char *name
)
86 extern char *strchr ();
88 if (!strchr (name
, ':'))
90 fprintf (stderr
, "%s: Must specify tcp connection as host:addr\n", name
);
98 struct sockaddr_in sockaddr
;
102 port_str
= strchr (name
, ':');
104 port
= atoi (port_str
+ 1);
106 tmp_desc
= socket (PF_INET
, SOCK_STREAM
, 0);
108 perror_with_name ("Can't open socket");
110 /* Allow rapid reuse of this port. */
112 setsockopt (tmp_desc
, SOL_SOCKET
, SO_REUSEADDR
, (char *) &tmp
,
115 sockaddr
.sin_family
= PF_INET
;
116 sockaddr
.sin_port
= htons (port
);
117 sockaddr
.sin_addr
.s_addr
= INADDR_ANY
;
119 if (bind (tmp_desc
, (struct sockaddr
*) &sockaddr
, sizeof (sockaddr
))
120 || listen (tmp_desc
, 1))
121 perror_with_name ("Can't bind address");
123 tmp
= sizeof (sockaddr
);
124 remote_desc
= accept (tmp_desc
, (struct sockaddr
*) &sockaddr
, &tmp
);
125 if (remote_desc
== -1)
126 perror_with_name ("Accept failed");
128 /* Enable TCP keep alive process. */
130 setsockopt (tmp_desc
, SOL_SOCKET
, SO_KEEPALIVE
, (char *) &tmp
, sizeof (tmp
));
132 /* Tell TCP not to delay small packets. This greatly speeds up
133 interactive response. */
135 setsockopt (remote_desc
, IPPROTO_TCP
, TCP_NODELAY
,
136 (char *) &tmp
, sizeof (tmp
));
138 close (tmp_desc
); /* No longer need this */
140 signal (SIGPIPE
, SIG_IGN
); /* If we don't do this, then gdbreplay simply
141 exits when the remote side dies. */
144 fcntl (remote_desc
, F_SETFL
, FASYNC
);
146 fprintf (stderr
, "Replay logfile using %s\n", name
);
153 if (ch
>= '0' && ch
<= '9')
157 if (ch
>= 'A' && ch
<= 'F')
159 return (ch
- 'A' + 10);
161 if (ch
>= 'a' && ch
<= 'f')
163 return (ch
- 'a' + 10);
165 fprintf (stderr
, "\nInvalid hex digit '%c'\n", ch
);
214 ch
= tohex (ch2
) << 4;
221 /* Treat any other char as just itself */
230 /* Accept input from gdb and match with chars from fp (after skipping one
231 blank) up until a \n is read from fp (which is not matched) */
237 unsigned char fromgdb
;
239 if ((fromlog
= logchar (fp
)) != ' ')
241 sync_error (fp
, "Sync error during gdb read of leading blank", ' ',
246 fromlog
= logchar (fp
);
251 read (remote_desc
, &fromgdb
, 1);
253 while (fromlog
== fromgdb
);
256 sync_error (fp
, "Sync error during read of gdb packet", fromlog
,
261 /* Play data back to gdb from fp (after skipping leading blank) up until a
262 \n is read from fp (which is discarded and not sent to gdb). */
270 if ((fromlog
= logchar (fp
)) != ' ')
272 sync_error (fp
, "Sync error skipping blank during write to gdb", ' ',
275 while ((fromlog
= logchar (fp
)) != EOL
)
278 write (remote_desc
, &ch
, 1);
283 main (int argc
, char *argv
[])
290 fprintf (stderr
, "Usage: gdbreplay <logfile> <host:port>\n");
294 fp
= fopen (argv
[1], "r");
297 perror_with_name (argv
[1]);
299 remote_open (argv
[2]);
300 while ((ch
= logchar (fp
)) != EOF
)
305 /* data sent from gdb to gdbreplay, accept and match it */
309 /* data sent from gdbreplay to gdb, play it */
313 /* Command executed by gdb */
314 while ((ch
= logchar (fp
)) != EOL
);
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