1 /* Replay a remote debug session logfile for GDB.
2 Copyright (C) 1996, 1998, 1999, 2000, 2002, 2003, 2005, 2006, 2007, 2008
3 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 (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) 2008 Free Software Foundation, Inc.\n"
399 "gdbserver is free software, covered by the GNU General Public License.\n"
400 "This gdbserver 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);