1 /* Replay a remote debug session logfile for GDB.
2 Copyright (C) 1996-2018 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-defs.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>
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);
295 if (ch >= '0' && ch <= '9')
299 if (ch >= 'A' && ch <= 'F')
301 return (ch - 'A' + 10);
303 if (ch >= 'a' && ch <= 'f')
305 return (ch - 'a' + 10);
307 fprintf (stderr, "\nInvalid hex digit '%c'\n", ch);
356 ch = fromhex (ch2) << 4;
363 /* Treat any other char as just itself */
375 unsigned char fromgdb;
377 if (read (desc, &fromgdb, 1) != 1)
383 /* Accept input from gdb and match with chars from fp (after skipping one
384 blank) up until a \n is read from fp (which is not matched) */
392 if ((fromlog = logchar (fp)) != ' ')
394 sync_error (fp, "Sync error during gdb read of leading blank", ' ',
399 fromlog = logchar (fp);
402 fromgdb = gdbchar (remote_desc);
404 remote_error ("Error during read from gdb");
406 while (fromlog == fromgdb);
410 sync_error (fp, "Sync error during read of gdb packet from log", fromlog,
415 /* Play data back to gdb from fp (after skipping leading blank) up until a
416 \n is read from fp (which is discarded and not sent to gdb). */
424 if ((fromlog = logchar (fp)) != ' ')
426 sync_error (fp, "Sync error skipping blank during write to gdb", ' ',
429 while ((fromlog = logchar (fp)) != EOL)
432 if (write (remote_desc, &ch, 1) != 1)
433 remote_error ("Error during write to gdb");
438 gdbreplay_version (void)
440 printf ("GNU gdbreplay %s%s\n"
441 "Copyright (C) 2018 Free Software Foundation, Inc.\n"
442 "gdbreplay is free software, covered by "
443 "the GNU General Public License.\n"
444 "This gdbreplay was configured as \"%s\"\n",
445 PKGVERSION, version, host_name);
449 gdbreplay_usage (FILE *stream)
451 fprintf (stream, "Usage:\tgdbreplay <logfile> <host:port>\n");
452 if (REPORT_BUGS_TO[0] && stream == stdout)
453 fprintf (stream, "Report bugs to \"%s\".\n", REPORT_BUGS_TO);
456 /* Main function. This is called by the real "main" function,
457 wrapped in a TRY_CATCH that handles any uncaught exceptions. */
459 static void ATTRIBUTE_NORETURN
460 captured_main (int argc, char *argv[])
465 if (argc >= 2 && strcmp (argv[1], "--version") == 0)
467 gdbreplay_version ();
470 if (argc >= 2 && strcmp (argv[1], "--help") == 0)
472 gdbreplay_usage (stdout);
478 gdbreplay_usage (stderr);
481 fp = fopen (argv[1], "r");
484 perror_with_name (argv[1]);
486 remote_open (argv[2]);
487 while ((ch = logchar (fp)) != EOF)
492 /* data sent from gdb to gdbreplay, accept and match it */
496 /* data sent from gdbreplay to gdb, play it */
500 /* Command executed by gdb */
501 while ((ch = logchar (fp)) != EOL);
510 main (int argc, char *argv[])
514 captured_main (argc, argv);
516 CATCH (exception, RETURN_MASK_ALL)
518 if (exception.reason == RETURN_ERROR)
521 fprintf (stderr, "%s\n", exception.message);
528 gdb_assert_not_reached ("captured_main should never return");