1 /* Replay a remote debug session logfile for GDB.
2 Copyright (C) 1996, 1998, 1999, 2000, 2002, 2003, 2005, 2006, 2007
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 2 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, write to the Free Software
20 Foundation, Inc., 51 Franklin Street, Fifth Floor,
21 Boston, MA 02110-1301, USA. */
47 #ifdef HAVE_NETINET_IN_H
48 #include <netinet/in.h>
50 #ifdef HAVE_SYS_SOCKET_H
51 #include <sys/socket.h>
56 #if HAVE_NETINET_TCP_H
57 #include <netinet/tcp.h>
67 #ifndef HAVE_SOCKLEN_T
68 typedef int socklen_t;
71 /* Sort of a hack... */
74 static int remote_desc;
79 #define COUNTOF(STR) (sizeof (STR) / sizeof ((STR)[0]))
82 #define errno (GetLastError ())
85 strerror (DWORD error)
87 static char buf[1024];
89 DWORD lasterr = GetLastError ();
90 DWORD chars = FormatMessageW (FORMAT_MESSAGE_FROM_SYSTEM
91 | FORMAT_MESSAGE_ALLOCATE_BUFFER,
94 0, /* Default language */
100 /* If there is an \r\n appended, zap it. */
102 && msgbuf[chars - 2] == '\r'
103 && msgbuf[chars - 1] == '\n')
109 if (chars > ((COUNTOF (buf)) - 1))
111 chars = COUNTOF (buf) - 1;
115 wcstombs (buf, msgbuf, chars + 1);
119 sprintf (buf, "unknown win32 error (%ld)", error);
121 SetLastError (lasterr);
125 #endif /* __MINGW32CE__ */
127 /* Print the system error message for errno, and also mention STRING
128 as the file name for which the error was encountered.
129 Then return to command level. */
132 perror_with_name (char *string)
140 err = strerror (errno);
142 err = "unknown error";
144 combined = (char *) alloca (strlen (err) + strlen (string) + 3);
145 strcpy (combined, string);
146 strcat (combined, ": ");
147 strcat (combined, err);
148 fprintf (stderr, "\n%s.\n", combined);
154 sync_error (FILE *fp, char *desc, int expect, int got)
156 fprintf (stderr, "\n%s\n", desc);
157 fprintf (stderr, "At logfile offset %ld, expected '0x%x' got '0x%x'\n",
158 ftell (fp), expect, got);
167 closesocket (remote_desc);
173 /* Open a connection to a remote debugger.
174 NAME is the filename used for communication. */
177 remote_open (char *name)
179 if (!strchr (name, ':'))
181 fprintf (stderr, "%s: Must specify tcp connection as host:addr\n", name);
188 static int winsock_initialized;
192 struct sockaddr_in sockaddr;
196 port_str = strchr (name, ':');
198 port = atoi (port_str + 1);
201 if (!winsock_initialized)
205 WSAStartup (MAKEWORD (1, 0), &wsad);
206 winsock_initialized = 1;
210 tmp_desc = socket (PF_INET, SOCK_STREAM, 0);
212 perror_with_name ("Can't open socket");
214 /* Allow rapid reuse of this port. */
216 setsockopt (tmp_desc, SOL_SOCKET, SO_REUSEADDR, (char *) &tmp,
219 sockaddr.sin_family = PF_INET;
220 sockaddr.sin_port = htons (port);
221 sockaddr.sin_addr.s_addr = INADDR_ANY;
223 if (bind (tmp_desc, (struct sockaddr *) &sockaddr, sizeof (sockaddr))
224 || listen (tmp_desc, 1))
225 perror_with_name ("Can't bind address");
227 tmp = sizeof (sockaddr);
228 remote_desc = accept (tmp_desc, (struct sockaddr *) &sockaddr, &tmp);
229 if (remote_desc == -1)
230 perror_with_name ("Accept failed");
232 /* Enable TCP keep alive process. */
234 setsockopt (tmp_desc, SOL_SOCKET, SO_KEEPALIVE, (char *) &tmp, sizeof (tmp));
236 /* Tell TCP not to delay small packets. This greatly speeds up
237 interactive response. */
239 setsockopt (remote_desc, IPPROTO_TCP, TCP_NODELAY,
240 (char *) &tmp, sizeof (tmp));
243 close (tmp_desc); /* No longer need this */
245 signal (SIGPIPE, SIG_IGN); /* If we don't do this, then gdbreplay simply
246 exits when the remote side dies. */
248 closesocket (tmp_desc); /* No longer need this */
252 #if defined(F_SETFL) && defined (FASYNC)
253 fcntl (remote_desc, F_SETFL, FASYNC);
256 fprintf (stderr, "Replay logfile using %s\n", name);
263 if (ch >= '0' && ch <= '9')
267 if (ch >= 'A' && ch <= 'F')
269 return (ch - 'A' + 10);
271 if (ch >= 'a' && ch <= 'f')
273 return (ch - 'a' + 10);
275 fprintf (stderr, "\nInvalid hex digit '%c'\n", ch);
324 ch = tohex (ch2) << 4;
331 /* Treat any other char as just itself */
340 /* Accept input from gdb and match with chars from fp (after skipping one
341 blank) up until a \n is read from fp (which is not matched) */
347 unsigned char fromgdb;
349 if ((fromlog = logchar (fp)) != ' ')
351 sync_error (fp, "Sync error during gdb read of leading blank", ' ',
356 fromlog = logchar (fp);
361 read (remote_desc, &fromgdb, 1);
363 while (fromlog == fromgdb);
366 sync_error (fp, "Sync error during read of gdb packet", fromlog,
371 /* Play data back to gdb from fp (after skipping leading blank) up until a
372 \n is read from fp (which is discarded and not sent to gdb). */
380 if ((fromlog = logchar (fp)) != ' ')
382 sync_error (fp, "Sync error skipping blank during write to gdb", ' ',
385 while ((fromlog = logchar (fp)) != EOL)
388 write (remote_desc, &ch, 1);
393 main (int argc, char *argv[])
400 fprintf (stderr, "Usage: gdbreplay <logfile> <host:port>\n");
404 fp = fopen (argv[1], "r");
407 perror_with_name (argv[1]);
409 remote_open (argv[2]);
410 while ((ch = logchar (fp)) != EOF)
415 /* data sent from gdb to gdbreplay, accept and match it */
419 /* data sent from gdbreplay to gdb, play it */
423 /* Command executed by gdb */
424 while ((ch = logchar (fp)) != EOL);