1 /* Replay a remote debug session logfile for GDB.
2 Copyright (C) 1996, 1998, 1999, 2000, 2002, 2003, 2005
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. */
26 #include <netinet/in.h>
27 #include <sys/socket.h>
29 #include <netinet/tcp.h>
45 #ifndef HAVE_SOCKLEN_T
46 typedef int socklen_t;
49 /* Sort of a hack... */
52 static int remote_desc;
54 /* Print the system error message for errno, and also mention STRING
55 as the file name for which the error was encountered.
56 Then return to command level. */
59 perror_with_name (char *string)
67 err = strerror (errno);
69 err = "unknown error";
71 combined = (char *) alloca (strlen (err) + strlen (string) + 3);
72 strcpy (combined, string);
73 strcat (combined, ": ");
74 strcat (combined, err);
75 fprintf (stderr, "\n%s.\n", combined);
81 sync_error (FILE *fp, char *desc, int expect, int got)
83 fprintf (stderr, "\n%s\n", desc);
84 fprintf (stderr, "At logfile offset %ld, expected '0x%x' got '0x%x'\n",
85 ftell (fp), expect, got);
96 /* Open a connection to a remote debugger.
97 NAME is the filename used for communication. */
100 remote_open (char *name)
102 if (!strchr (name, ':'))
104 fprintf (stderr, "%s: Must specify tcp connection as host:addr\n", name);
112 struct sockaddr_in sockaddr;
116 port_str = strchr (name, ':');
118 port = atoi (port_str + 1);
120 tmp_desc = socket (PF_INET, SOCK_STREAM, 0);
122 perror_with_name ("Can't open socket");
124 /* Allow rapid reuse of this port. */
126 setsockopt (tmp_desc, SOL_SOCKET, SO_REUSEADDR, (char *) &tmp,
129 sockaddr.sin_family = PF_INET;
130 sockaddr.sin_port = htons (port);
131 sockaddr.sin_addr.s_addr = INADDR_ANY;
133 if (bind (tmp_desc, (struct sockaddr *) &sockaddr, sizeof (sockaddr))
134 || listen (tmp_desc, 1))
135 perror_with_name ("Can't bind address");
137 tmp = sizeof (sockaddr);
138 remote_desc = accept (tmp_desc, (struct sockaddr *) &sockaddr, &tmp);
139 if (remote_desc == -1)
140 perror_with_name ("Accept failed");
142 /* Enable TCP keep alive process. */
144 setsockopt (tmp_desc, SOL_SOCKET, SO_KEEPALIVE, (char *) &tmp, sizeof (tmp));
146 /* Tell TCP not to delay small packets. This greatly speeds up
147 interactive response. */
149 setsockopt (remote_desc, IPPROTO_TCP, TCP_NODELAY,
150 (char *) &tmp, sizeof (tmp));
152 close (tmp_desc); /* No longer need this */
154 signal (SIGPIPE, SIG_IGN); /* If we don't do this, then gdbreplay simply
155 exits when the remote side dies. */
158 fcntl (remote_desc, F_SETFL, FASYNC);
160 fprintf (stderr, "Replay logfile using %s\n", name);
167 if (ch >= '0' && ch <= '9')
171 if (ch >= 'A' && ch <= 'F')
173 return (ch - 'A' + 10);
175 if (ch >= 'a' && ch <= 'f')
177 return (ch - 'a' + 10);
179 fprintf (stderr, "\nInvalid hex digit '%c'\n", ch);
228 ch = tohex (ch2) << 4;
235 /* Treat any other char as just itself */
244 /* Accept input from gdb and match with chars from fp (after skipping one
245 blank) up until a \n is read from fp (which is not matched) */
251 unsigned char fromgdb;
253 if ((fromlog = logchar (fp)) != ' ')
255 sync_error (fp, "Sync error during gdb read of leading blank", ' ',
260 fromlog = logchar (fp);
265 read (remote_desc, &fromgdb, 1);
267 while (fromlog == fromgdb);
270 sync_error (fp, "Sync error during read of gdb packet", fromlog,
275 /* Play data back to gdb from fp (after skipping leading blank) up until a
276 \n is read from fp (which is discarded and not sent to gdb). */
284 if ((fromlog = logchar (fp)) != ' ')
286 sync_error (fp, "Sync error skipping blank during write to gdb", ' ',
289 while ((fromlog = logchar (fp)) != EOL)
292 write (remote_desc, &ch, 1);
297 main (int argc, char *argv[])
304 fprintf (stderr, "Usage: gdbreplay <logfile> <host:port>\n");
308 fp = fopen (argv[1], "r");
311 perror_with_name (argv[1]);
313 remote_open (argv[2]);
314 while ((ch = logchar (fp)) != EOF)
319 /* data sent from gdb to gdbreplay, accept and match it */
323 /* data sent from gdbreplay to gdb, play it */
327 /* Command executed by gdb */
328 while ((ch = logchar (fp)) != EOL);