1 /* Replay a remote debug session logfile for GDB.
2 Copyright (C) 1996-2019 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 3 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, see <http://www.gnu.org/licenses/>. */
20 #include "gdbsupport/common-defs.h"
21 #include "gdbsupport/version.h"
34 #ifdef HAVE_NETINET_IN_H
35 #include <netinet/in.h>
37 #ifdef HAVE_SYS_SOCKET_H
38 #include <sys/socket.h>
43 #if HAVE_NETINET_TCP_H
44 #include <netinet/tcp.h>
51 #include "gdbsupport/netstuff.h"
52 #include "gdbsupport/rsp-low.h"
54 #ifndef HAVE_SOCKLEN_T
55 typedef int socklen_t
;
58 /* Sort of a hack... */
61 static int remote_desc
;
66 #define COUNTOF(STR) (sizeof (STR) / sizeof ((STR)[0]))
69 #define errno (GetLastError ())
72 strerror (DWORD error
)
74 static char buf
[1024];
76 DWORD lasterr
= GetLastError ();
77 DWORD chars
= FormatMessageW (FORMAT_MESSAGE_FROM_SYSTEM
78 | FORMAT_MESSAGE_ALLOCATE_BUFFER
,
81 0, /* Default language */
87 /* If there is an \r\n appended, zap it. */
89 && msgbuf
[chars
- 2] == '\r'
90 && msgbuf
[chars
- 1] == '\n')
96 if (chars
> ((COUNTOF (buf
)) - 1))
98 chars
= COUNTOF (buf
) - 1;
102 wcstombs (buf
, msgbuf
, chars
+ 1);
106 sprintf (buf
, "unknown win32 error (%ld)", error
);
108 SetLastError (lasterr
);
112 #endif /* __MINGW32CE__ */
115 sync_error (FILE *fp
, const char *desc
, int expect
, int got
)
117 fprintf (stderr
, "\n%s\n", desc
);
118 fprintf (stderr
, "At logfile offset %ld, expected '0x%x' got '0x%x'\n",
119 ftell (fp
), expect
, got
);
125 remote_error (const char *desc
)
127 fprintf (stderr
, "\n%s\n", desc
);
136 closesocket (remote_desc
);
142 /* Open a connection to a remote debugger.
143 NAME is the filename used for communication. */
146 remote_open (char *name
)
148 char *last_colon
= strrchr (name
, ':');
150 if (last_colon
== NULL
)
152 fprintf (stderr
, "%s: Must specify tcp connection as host:addr\n", name
);
158 static int winsock_initialized
;
162 struct addrinfo hint
;
163 struct addrinfo
*ainfo
;
165 memset (&hint
, 0, sizeof (hint
));
166 /* Assume no prefix will be passed, therefore we should use
168 hint
.ai_family
= AF_UNSPEC
;
169 hint
.ai_socktype
= SOCK_STREAM
;
170 hint
.ai_protocol
= IPPROTO_TCP
;
172 parsed_connection_spec parsed
= parse_connection_spec (name
, &hint
);
174 if (parsed
.port_str
.empty ())
175 error (_("Missing port on hostname '%s'"), name
);
178 if (!winsock_initialized
)
182 WSAStartup (MAKEWORD (1, 0), &wsad
);
183 winsock_initialized
= 1;
187 int r
= getaddrinfo (parsed
.host_str
.c_str (), parsed
.port_str
.c_str (),
192 fprintf (stderr
, "%s:%s: cannot resolve name: %s\n",
193 parsed
.host_str
.c_str (), parsed
.port_str
.c_str (),
199 scoped_free_addrinfo
free_ainfo (ainfo
);
203 for (p
= ainfo
; p
!= NULL
; p
= p
->ai_next
)
205 tmp_desc
= socket (p
->ai_family
, p
->ai_socktype
, p
->ai_protocol
);
212 perror_with_name ("Cannot open socket");
214 /* Allow rapid reuse of this port. */
216 setsockopt (tmp_desc
, SOL_SOCKET
, SO_REUSEADDR
, (char *) &tmp
,
219 switch (p
->ai_family
)
222 ((struct sockaddr_in
*) p
->ai_addr
)->sin_addr
.s_addr
= INADDR_ANY
;
225 ((struct sockaddr_in6
*) p
->ai_addr
)->sin6_addr
= in6addr_any
;
228 fprintf (stderr
, "Invalid 'ai_family' %d\n", p
->ai_family
);
232 if (bind (tmp_desc
, p
->ai_addr
, p
->ai_addrlen
) != 0)
233 perror_with_name ("Can't bind address");
235 if (p
->ai_socktype
== SOCK_DGRAM
)
236 remote_desc
= tmp_desc
;
239 struct sockaddr_storage sockaddr
;
240 socklen_t sockaddrsize
= sizeof (sockaddr
);
241 char orig_host
[GDB_NI_MAX_ADDR
], orig_port
[GDB_NI_MAX_PORT
];
243 if (listen (tmp_desc
, 1) != 0)
244 perror_with_name ("Can't listen on socket");
246 remote_desc
= accept (tmp_desc
, (struct sockaddr
*) &sockaddr
,
249 if (remote_desc
== -1)
250 perror_with_name ("Accept failed");
252 /* Enable TCP keep alive process. */
254 setsockopt (tmp_desc
, SOL_SOCKET
, SO_KEEPALIVE
,
255 (char *) &tmp
, sizeof (tmp
));
257 /* Tell TCP not to delay small packets. This greatly speeds up
258 interactive response. */
260 setsockopt (remote_desc
, IPPROTO_TCP
, TCP_NODELAY
,
261 (char *) &tmp
, sizeof (tmp
));
263 if (getnameinfo ((struct sockaddr
*) &sockaddr
, sockaddrsize
,
264 orig_host
, sizeof (orig_host
),
265 orig_port
, sizeof (orig_port
),
266 NI_NUMERICHOST
| NI_NUMERICSERV
) == 0)
268 fprintf (stderr
, "Remote debugging from host %s, port %s\n",
269 orig_host
, orig_port
);
274 close (tmp_desc
); /* No longer need this */
276 signal (SIGPIPE
, SIG_IGN
); /* If we don't do this, then
277 gdbreplay simply exits when
278 the remote side dies. */
280 closesocket (tmp_desc
); /* No longer need this */
284 #if defined(F_SETFL) && defined (FASYNC)
285 fcntl (remote_desc
, F_SETFL
, FASYNC
);
288 fprintf (stderr
, "Replay logfile using %s\n", name
);
306 /* Treat \r\n as a newline. */
316 fputc (ch
== EOL
? '\n' : '\r', stdout
);
352 ch
= fromhex (ch2
) << 4;
359 /* Treat any other char as just itself */
371 unsigned char fromgdb
;
373 if (read (desc
, &fromgdb
, 1) != 1)
379 /* Accept input from gdb and match with chars from fp (after skipping one
380 blank) up until a \n is read from fp (which is not matched) */
388 if ((fromlog
= logchar (fp
)) != ' ')
390 sync_error (fp
, "Sync error during gdb read of leading blank", ' ',
395 fromlog
= logchar (fp
);
398 fromgdb
= gdbchar (remote_desc
);
400 remote_error ("Error during read from gdb");
402 while (fromlog
== fromgdb
);
406 sync_error (fp
, "Sync error during read of gdb packet from log", fromlog
,
411 /* Play data back to gdb from fp (after skipping leading blank) up until a
412 \n is read from fp (which is discarded and not sent to gdb). */
420 if ((fromlog
= logchar (fp
)) != ' ')
422 sync_error (fp
, "Sync error skipping blank during write to gdb", ' ',
425 while ((fromlog
= logchar (fp
)) != EOL
)
428 if (write (remote_desc
, &ch
, 1) != 1)
429 remote_error ("Error during write to gdb");
434 gdbreplay_version (void)
436 printf ("GNU gdbreplay %s%s\n"
437 "Copyright (C) 2019 Free Software Foundation, Inc.\n"
438 "gdbreplay is free software, covered by "
439 "the GNU General Public License.\n"
440 "This gdbreplay was configured as \"%s\"\n",
441 PKGVERSION
, version
, host_name
);
445 gdbreplay_usage (FILE *stream
)
447 fprintf (stream
, "Usage:\tgdbreplay LOGFILE HOST:PORT\n");
448 if (REPORT_BUGS_TO
[0] && stream
== stdout
)
449 fprintf (stream
, "Report bugs to \"%s\".\n", REPORT_BUGS_TO
);
452 /* Main function. This is called by the real "main" function,
453 wrapped in a TRY_CATCH that handles any uncaught exceptions. */
455 static void ATTRIBUTE_NORETURN
456 captured_main (int argc
, char *argv
[])
461 if (argc
>= 2 && strcmp (argv
[1], "--version") == 0)
463 gdbreplay_version ();
466 if (argc
>= 2 && strcmp (argv
[1], "--help") == 0)
468 gdbreplay_usage (stdout
);
474 gdbreplay_usage (stderr
);
477 fp
= fopen (argv
[1], "r");
480 perror_with_name (argv
[1]);
482 remote_open (argv
[2]);
483 while ((ch
= logchar (fp
)) != EOF
)
488 /* data sent from gdb to gdbreplay, accept and match it */
492 /* data sent from gdbreplay to gdb, play it */
496 /* Command executed by gdb */
497 while ((ch
= logchar (fp
)) != EOL
);
506 main (int argc
, char *argv
[])
510 captured_main (argc
, argv
);
512 catch (const gdb_exception
&exception
)
514 if (exception
.reason
== RETURN_ERROR
)
517 fprintf (stderr
, "%s\n", exception
.what ());
523 gdb_assert_not_reached ("captured_main should never return");