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 "common/common-defs.h"
21 #include "common/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>
48 #if _WIN32_WINNT < 0x0501
50 # define _WIN32_WINNT 0x0501
55 #include "common/netstuff.h"
57 #ifndef HAVE_SOCKLEN_T
58 typedef int socklen_t
;
61 /* Sort of a hack... */
64 static int remote_desc
;
69 #define COUNTOF(STR) (sizeof (STR) / sizeof ((STR)[0]))
72 #define errno (GetLastError ())
75 strerror (DWORD error
)
77 static char buf
[1024];
79 DWORD lasterr
= GetLastError ();
80 DWORD chars
= FormatMessageW (FORMAT_MESSAGE_FROM_SYSTEM
81 | FORMAT_MESSAGE_ALLOCATE_BUFFER
,
84 0, /* Default language */
90 /* If there is an \r\n appended, zap it. */
92 && msgbuf
[chars
- 2] == '\r'
93 && msgbuf
[chars
- 1] == '\n')
99 if (chars
> ((COUNTOF (buf
)) - 1))
101 chars
= COUNTOF (buf
) - 1;
105 wcstombs (buf
, msgbuf
, chars
+ 1);
109 sprintf (buf
, "unknown win32 error (%ld)", error
);
111 SetLastError (lasterr
);
115 #endif /* __MINGW32CE__ */
118 sync_error (FILE *fp
, const char *desc
, int expect
, int got
)
120 fprintf (stderr
, "\n%s\n", desc
);
121 fprintf (stderr
, "At logfile offset %ld, expected '0x%x' got '0x%x'\n",
122 ftell (fp
), expect
, got
);
128 remote_error (const char *desc
)
130 fprintf (stderr
, "\n%s\n", desc
);
139 closesocket (remote_desc
);
145 /* Open a connection to a remote debugger.
146 NAME is the filename used for communication. */
149 remote_open (char *name
)
151 char *last_colon
= strrchr (name
, ':');
153 if (last_colon
== NULL
)
155 fprintf (stderr
, "%s: Must specify tcp connection as host:addr\n", name
);
161 static int winsock_initialized
;
165 struct addrinfo hint
;
166 struct addrinfo
*ainfo
;
168 memset (&hint
, 0, sizeof (hint
));
169 /* Assume no prefix will be passed, therefore we should use
171 hint
.ai_family
= AF_UNSPEC
;
172 hint
.ai_socktype
= SOCK_STREAM
;
173 hint
.ai_protocol
= IPPROTO_TCP
;
175 parsed_connection_spec parsed
= parse_connection_spec (name
, &hint
);
177 if (parsed
.port_str
.empty ())
178 error (_("Missing port on hostname '%s'"), name
);
181 if (!winsock_initialized
)
185 WSAStartup (MAKEWORD (1, 0), &wsad
);
186 winsock_initialized
= 1;
190 int r
= getaddrinfo (parsed
.host_str
.c_str (), parsed
.port_str
.c_str (),
195 fprintf (stderr
, "%s:%s: cannot resolve name: %s\n",
196 parsed
.host_str
.c_str (), parsed
.port_str
.c_str (),
202 scoped_free_addrinfo
free_ainfo (ainfo
);
206 for (p
= ainfo
; p
!= NULL
; p
= p
->ai_next
)
208 tmp_desc
= socket (p
->ai_family
, p
->ai_socktype
, p
->ai_protocol
);
215 perror_with_name ("Cannot open socket");
217 /* Allow rapid reuse of this port. */
219 setsockopt (tmp_desc
, SOL_SOCKET
, SO_REUSEADDR
, (char *) &tmp
,
222 switch (p
->ai_family
)
225 ((struct sockaddr_in
*) p
->ai_addr
)->sin_addr
.s_addr
= INADDR_ANY
;
228 ((struct sockaddr_in6
*) p
->ai_addr
)->sin6_addr
= in6addr_any
;
231 fprintf (stderr
, "Invalid 'ai_family' %d\n", p
->ai_family
);
235 if (bind (tmp_desc
, p
->ai_addr
, p
->ai_addrlen
) != 0)
236 perror_with_name ("Can't bind address");
238 if (p
->ai_socktype
== SOCK_DGRAM
)
239 remote_desc
= tmp_desc
;
242 struct sockaddr_storage sockaddr
;
243 socklen_t sockaddrsize
= sizeof (sockaddr
);
244 char orig_host
[GDB_NI_MAX_ADDR
], orig_port
[GDB_NI_MAX_PORT
];
246 if (listen (tmp_desc
, 1) != 0)
247 perror_with_name ("Can't listen on socket");
249 remote_desc
= accept (tmp_desc
, (struct sockaddr
*) &sockaddr
,
252 if (remote_desc
== -1)
253 perror_with_name ("Accept failed");
255 /* Enable TCP keep alive process. */
257 setsockopt (tmp_desc
, SOL_SOCKET
, SO_KEEPALIVE
,
258 (char *) &tmp
, sizeof (tmp
));
260 /* Tell TCP not to delay small packets. This greatly speeds up
261 interactive response. */
263 setsockopt (remote_desc
, IPPROTO_TCP
, TCP_NODELAY
,
264 (char *) &tmp
, sizeof (tmp
));
266 if (getnameinfo ((struct sockaddr
*) &sockaddr
, sockaddrsize
,
267 orig_host
, sizeof (orig_host
),
268 orig_port
, sizeof (orig_port
),
269 NI_NUMERICHOST
| NI_NUMERICSERV
) == 0)
271 fprintf (stderr
, "Remote debugging from host %s, port %s\n",
272 orig_host
, orig_port
);
277 close (tmp_desc
); /* No longer need this */
279 signal (SIGPIPE
, SIG_IGN
); /* If we don't do this, then
280 gdbreplay simply exits when
281 the remote side dies. */
283 closesocket (tmp_desc
); /* No longer need this */
287 #if defined(F_SETFL) && defined (FASYNC)
288 fcntl (remote_desc
, F_SETFL
, FASYNC
);
291 fprintf (stderr
, "Replay logfile using %s\n", name
);
298 if (ch
>= '0' && ch
<= '9')
302 if (ch
>= 'A' && ch
<= 'F')
304 return (ch
- 'A' + 10);
306 if (ch
>= 'a' && ch
<= 'f')
308 return (ch
- 'a' + 10);
310 fprintf (stderr
, "\nInvalid hex digit '%c'\n", ch
);
329 /* Treat \r\n as a newline. */
339 fputc (ch
== EOL
? '\n' : '\r', stdout
);
375 ch
= fromhex (ch2
) << 4;
382 /* Treat any other char as just itself */
394 unsigned char fromgdb
;
396 if (read (desc
, &fromgdb
, 1) != 1)
402 /* Accept input from gdb and match with chars from fp (after skipping one
403 blank) up until a \n is read from fp (which is not matched) */
411 if ((fromlog
= logchar (fp
)) != ' ')
413 sync_error (fp
, "Sync error during gdb read of leading blank", ' ',
418 fromlog
= logchar (fp
);
421 fromgdb
= gdbchar (remote_desc
);
423 remote_error ("Error during read from gdb");
425 while (fromlog
== fromgdb
);
429 sync_error (fp
, "Sync error during read of gdb packet from log", fromlog
,
434 /* Play data back to gdb from fp (after skipping leading blank) up until a
435 \n is read from fp (which is discarded and not sent to gdb). */
443 if ((fromlog
= logchar (fp
)) != ' ')
445 sync_error (fp
, "Sync error skipping blank during write to gdb", ' ',
448 while ((fromlog
= logchar (fp
)) != EOL
)
451 if (write (remote_desc
, &ch
, 1) != 1)
452 remote_error ("Error during write to gdb");
457 gdbreplay_version (void)
459 printf ("GNU gdbreplay %s%s\n"
460 "Copyright (C) 2019 Free Software Foundation, Inc.\n"
461 "gdbreplay is free software, covered by "
462 "the GNU General Public License.\n"
463 "This gdbreplay was configured as \"%s\"\n",
464 PKGVERSION
, version
, host_name
);
468 gdbreplay_usage (FILE *stream
)
470 fprintf (stream
, "Usage:\tgdbreplay LOGFILE HOST:PORT\n");
471 if (REPORT_BUGS_TO
[0] && stream
== stdout
)
472 fprintf (stream
, "Report bugs to \"%s\".\n", REPORT_BUGS_TO
);
475 /* Main function. This is called by the real "main" function,
476 wrapped in a TRY_CATCH that handles any uncaught exceptions. */
478 static void ATTRIBUTE_NORETURN
479 captured_main (int argc
, char *argv
[])
484 if (argc
>= 2 && strcmp (argv
[1], "--version") == 0)
486 gdbreplay_version ();
489 if (argc
>= 2 && strcmp (argv
[1], "--help") == 0)
491 gdbreplay_usage (stdout
);
497 gdbreplay_usage (stderr
);
500 fp
= fopen (argv
[1], "r");
503 perror_with_name (argv
[1]);
505 remote_open (argv
[2]);
506 while ((ch
= logchar (fp
)) != EOF
)
511 /* data sent from gdb to gdbreplay, accept and match it */
515 /* data sent from gdbreplay to gdb, play it */
519 /* Command executed by gdb */
520 while ((ch
= logchar (fp
)) != EOL
);
529 main (int argc
, char *argv
[])
533 captured_main (argc
, argv
);
535 CATCH (exception
, RETURN_MASK_ALL
)
537 if (exception
.reason
== RETURN_ERROR
)
540 fprintf (stderr
, "%s\n", exception
.message
);
547 gdb_assert_not_reached ("captured_main should never return");