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. */
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 (string
)
49 extern char *sys_errlist
[];
55 err
= (errno
< sys_nerr
) ? sys_errlist
[errno
] : "unknown error";
56 combined
= (char *) alloca (strlen (err
) + strlen (string
) + 3);
57 strcpy (combined
, string
);
58 strcat (combined
, ": ");
59 strcat (combined
, err
);
60 fprintf (stderr
, "\n%s.\n", combined
);
66 sync_error (fp
, desc
, expect
, got
)
72 fprintf (stderr
, "\n%s\n", desc
);
73 fprintf (stderr
, "At logfile offset %ld, expected '0x%x' got '0x%x'\n",
74 ftell (fp
), expect
, got
);
85 /* Open a connection to a remote debugger.
86 NAME is the filename used for communication. */
92 extern char *strchr ();
94 if (!strchr (name
, ':'))
96 fprintf (stderr
, "%s: Must specify tcp connection as host:addr\n", name
);
104 struct sockaddr_in sockaddr
;
106 struct protoent
*protoent
;
109 port_str
= strchr (name
, ':');
111 port
= atoi (port_str
+ 1);
113 tmp_desc
= socket (PF_INET
, SOCK_STREAM
, 0);
115 perror_with_name ("Can't open socket");
117 /* Allow rapid reuse of this port. */
119 setsockopt (tmp_desc
, SOL_SOCKET
, SO_REUSEADDR
, (char *) &tmp
,
122 sockaddr
.sin_family
= PF_INET
;
123 sockaddr
.sin_port
= htons (port
);
124 sockaddr
.sin_addr
.s_addr
= INADDR_ANY
;
126 if (bind (tmp_desc
, (struct sockaddr
*) &sockaddr
, sizeof (sockaddr
))
127 || listen (tmp_desc
, 1))
128 perror_with_name ("Can't bind address");
130 tmp
= sizeof (sockaddr
);
131 remote_desc
= accept (tmp_desc
, (struct sockaddr
*) &sockaddr
, &tmp
);
132 if (remote_desc
== -1)
133 perror_with_name ("Accept failed");
135 protoent
= getprotobyname ("tcp");
137 perror_with_name ("getprotobyname");
139 /* Enable TCP keep alive process. */
141 setsockopt (tmp_desc
, SOL_SOCKET
, SO_KEEPALIVE
, (char *) &tmp
, sizeof (tmp
));
143 /* Tell TCP not to delay small packets. This greatly speeds up
144 interactive response. */
146 setsockopt (remote_desc
, protoent
->p_proto
, TCP_NODELAY
,
147 (char *) &tmp
, sizeof (tmp
));
149 close (tmp_desc
); /* No longer need this */
151 signal (SIGPIPE
, SIG_IGN
); /* If we don't do this, then gdbreplay simply
152 exits when the remote side dies. */
155 fcntl (remote_desc
, F_SETFL
, FASYNC
);
157 fprintf (stderr
, "Replay logfile using %s\n", name
);
165 if (ch
>= '0' && ch
<= '9')
169 if (ch
>= 'A' && ch
<= 'F')
171 return (ch
- 'A' + 10);
173 if (ch
>= 'a' && ch
<= 'f')
175 return (ch
- 'a' + 10);
177 fprintf (stderr
, "\nInvalid hex digit '%c'\n", ch
);
227 ch
= tohex (ch2
) << 4;
234 /* Treat any other char as just itself */
243 /* Accept input from gdb and match with chars from fp (after skipping one
244 blank) up until a \n is read from fp (which is not matched) */
251 unsigned char fromgdb
;
253 if ((fromlog
= logchar (fp
)) != ' ')
255 sync_error (fp
, "Sync error during gdb read of leading blank", ' ',
260 fromlog
= logchar (fp
);
265 read (remote_desc
, &fromgdb
, 1);
267 while (fromlog
== fromgdb
);
270 sync_error (fp
, "Sync error during read of gdb packet", fromlog
,
275 /* Play data back to gdb from fp (after skipping leading blank) up until a
276 \n is read from fp (which is discarded and not sent to gdb). */
285 if ((fromlog
= logchar (fp
)) != ' ')
287 sync_error (fp
, "Sync error skipping blank during write to gdb", ' ',
290 while ((fromlog
= logchar (fp
)) != EOL
)
293 write (remote_desc
, &ch
, 1);
307 fprintf (stderr
, "Usage: gdbreplay <logfile> <host:port>\n");
311 fp
= fopen (argv
[1], "r");
314 perror_with_name (argv
[1]);
316 remote_open (argv
[2]);
317 while ((ch
= logchar (fp
)) != EOF
)
322 /* data sent from gdb to gdbreplay, accept and match it */
326 /* data sent from gdbreplay to gdb, play it */
330 /* Command executed by gdb */
331 while ((ch
= logchar (fp
)) != EOL
);
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