1 /* Replay a remote debug session logfile for GDB.
2 Copyright (C) 1996, 1998, 1999, 2000, 2002, 2003, 2005, 2006, 2007, 2008,
3 2009 Free Software Foundation, Inc.
4 Written by Fred Fish (fnf@cygnus.com) from pieces of gdbserver.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
45 #ifdef HAVE_NETINET_IN_H
46 #include <netinet/in.h>
48 #ifdef HAVE_SYS_SOCKET_H
49 #include <sys/socket.h>
54 #if HAVE_NETINET_TCP_H
55 #include <netinet/tcp.h>
65 #ifndef HAVE_SOCKLEN_T
66 typedef int socklen_t
;
69 /* Sort of a hack... */
72 /* Version information, from version.c. */
73 extern const char version
[];
74 extern const char host_name
[];
76 static int remote_desc
;
81 #define COUNTOF(STR) (sizeof (STR) / sizeof ((STR)[0]))
84 #define errno (GetLastError ())
87 strerror (DWORD error
)
89 static char buf
[1024];
91 DWORD lasterr
= GetLastError ();
92 DWORD chars
= FormatMessageW (FORMAT_MESSAGE_FROM_SYSTEM
93 | FORMAT_MESSAGE_ALLOCATE_BUFFER
,
96 0, /* Default language */
102 /* If there is an \r\n appended, zap it. */
104 && msgbuf
[chars
- 2] == '\r'
105 && msgbuf
[chars
- 1] == '\n')
111 if (chars
> ((COUNTOF (buf
)) - 1))
113 chars
= COUNTOF (buf
) - 1;
117 wcstombs (buf
, msgbuf
, chars
+ 1);
121 sprintf (buf
, "unknown win32 error (%ld)", error
);
123 SetLastError (lasterr
);
127 #endif /* __MINGW32CE__ */
129 /* Print the system error message for errno, and also mention STRING
130 as the file name for which the error was encountered.
131 Then return to command level. */
134 perror_with_name (const char *string
)
142 err
= strerror (errno
);
144 err
= "unknown error";
146 combined
= (char *) alloca (strlen (err
) + strlen (string
) + 3);
147 strcpy (combined
, string
);
148 strcat (combined
, ": ");
149 strcat (combined
, err
);
150 fprintf (stderr
, "\n%s.\n", combined
);
156 sync_error (FILE *fp
, char *desc
, int expect
, int got
)
158 fprintf (stderr
, "\n%s\n", desc
);
159 fprintf (stderr
, "At logfile offset %ld, expected '0x%x' got '0x%x'\n",
160 ftell (fp
), expect
, got
);
169 closesocket (remote_desc
);
175 /* Open a connection to a remote debugger.
176 NAME is the filename used for communication. */
179 remote_open (char *name
)
181 if (!strchr (name
, ':'))
183 fprintf (stderr
, "%s: Must specify tcp connection as host:addr\n", name
);
190 static int winsock_initialized
;
194 struct sockaddr_in sockaddr
;
198 port_str
= strchr (name
, ':');
200 port
= atoi (port_str
+ 1);
203 if (!winsock_initialized
)
207 WSAStartup (MAKEWORD (1, 0), &wsad
);
208 winsock_initialized
= 1;
212 tmp_desc
= socket (PF_INET
, SOCK_STREAM
, 0);
214 perror_with_name ("Can't open socket");
216 /* Allow rapid reuse of this port. */
218 setsockopt (tmp_desc
, SOL_SOCKET
, SO_REUSEADDR
, (char *) &tmp
,
221 sockaddr
.sin_family
= PF_INET
;
222 sockaddr
.sin_port
= htons (port
);
223 sockaddr
.sin_addr
.s_addr
= INADDR_ANY
;
225 if (bind (tmp_desc
, (struct sockaddr
*) &sockaddr
, sizeof (sockaddr
))
226 || listen (tmp_desc
, 1))
227 perror_with_name ("Can't bind address");
229 tmp
= sizeof (sockaddr
);
230 remote_desc
= accept (tmp_desc
, (struct sockaddr
*) &sockaddr
, &tmp
);
231 if (remote_desc
== -1)
232 perror_with_name ("Accept failed");
234 /* Enable TCP keep alive process. */
236 setsockopt (tmp_desc
, SOL_SOCKET
, SO_KEEPALIVE
, (char *) &tmp
, sizeof (tmp
));
238 /* Tell TCP not to delay small packets. This greatly speeds up
239 interactive response. */
241 setsockopt (remote_desc
, IPPROTO_TCP
, TCP_NODELAY
,
242 (char *) &tmp
, sizeof (tmp
));
245 close (tmp_desc
); /* No longer need this */
247 signal (SIGPIPE
, SIG_IGN
); /* If we don't do this, then gdbreplay simply
248 exits when the remote side dies. */
250 closesocket (tmp_desc
); /* No longer need this */
254 #if defined(F_SETFL) && defined (FASYNC)
255 fcntl (remote_desc
, F_SETFL
, FASYNC
);
258 fprintf (stderr
, "Replay logfile using %s\n", name
);
265 if (ch
>= '0' && ch
<= '9')
269 if (ch
>= 'A' && ch
<= 'F')
271 return (ch
- 'A' + 10);
273 if (ch
>= 'a' && ch
<= 'f')
275 return (ch
- 'a' + 10);
277 fprintf (stderr
, "\nInvalid hex digit '%c'\n", ch
);
326 ch
= tohex (ch2
) << 4;
333 /* Treat any other char as just itself */
342 /* Accept input from gdb and match with chars from fp (after skipping one
343 blank) up until a \n is read from fp (which is not matched) */
349 unsigned char fromgdb
;
351 if ((fromlog
= logchar (fp
)) != ' ')
353 sync_error (fp
, "Sync error during gdb read of leading blank", ' ',
358 fromlog
= logchar (fp
);
363 read (remote_desc
, &fromgdb
, 1);
365 while (fromlog
== fromgdb
);
368 sync_error (fp
, "Sync error during read of gdb packet", fromlog
,
373 /* Play data back to gdb from fp (after skipping leading blank) up until a
374 \n is read from fp (which is discarded and not sent to gdb). */
382 if ((fromlog
= logchar (fp
)) != ' ')
384 sync_error (fp
, "Sync error skipping blank during write to gdb", ' ',
387 while ((fromlog
= logchar (fp
)) != EOL
)
390 write (remote_desc
, &ch
, 1);
395 gdbreplay_version (void)
397 printf ("GNU gdbreplay %s%s\n"
398 "Copyright (C) 2009 Free Software Foundation, Inc.\n"
399 "gdbreplay is free software, covered by the GNU General Public License.\n"
400 "This gdbreplay was configured as \"%s\"\n",
401 PKGVERSION
, version
, host_name
);
405 gdbreplay_usage (FILE *stream
)
407 fprintf (stream
, "Usage:\tgdbreplay <logfile> <host:port>\n");
408 if (REPORT_BUGS_TO
[0] && stream
== stdout
)
409 fprintf (stream
, "Report bugs to \"%s\".\n", REPORT_BUGS_TO
);
413 main (int argc
, char *argv
[])
418 if (argc
>= 2 && strcmp (argv
[1], "--version") == 0)
420 gdbreplay_version ();
423 if (argc
>= 2 && strcmp (argv
[1], "--help") == 0)
425 gdbreplay_usage (stdout
);
431 gdbreplay_usage (stderr
);
434 fp
= fopen (argv
[1], "r");
437 perror_with_name (argv
[1]);
439 remote_open (argv
[2]);
440 while ((ch
= logchar (fp
)) != EOF
)
445 /* data sent from gdb to gdbreplay, accept and match it */
449 /* data sent from gdbreplay to gdb, play it */
453 /* Command executed by gdb */
454 while ((ch
= logchar (fp
)) != EOL
);