1 /* Replay a remote debug session logfile for GDB.
2 Copyright (C) 1996 Free Software Foundation, Inc.
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 2 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, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
24 #include <netinet/in.h>
25 #include <sys/socket.h>
27 #include <netinet/tcp.h>
31 /* Sort of a hack... */
34 static int remote_desc;
36 /* Print the system error message for errno, and also mention STRING
37 as the file name for which the error was encountered.
38 Then return to command level. */
41 perror_with_name (string)
45 extern char *sys_errlist[];
50 err = (errno < sys_nerr) ? sys_errlist[errno] : "unknown error";
51 combined = (char *) alloca (strlen (err) + strlen (string) + 3);
52 strcpy (combined, string);
53 strcat (combined, ": ");
54 strcat (combined, err);
55 fprintf (stderr, "\n%s.\n", combined);
61 sync_error (fp, desc, expect, got)
67 fprintf (stderr, "\n%s\n", desc);
68 fprintf (stderr, "At logfile offset %ld, expected '0x%x' got '0x%x'\n",
69 ftell (fp), expect, got);
80 /* Open a connection to a remote debugger.
81 NAME is the filename used for communication. */
88 extern char *strchr ();
90 if (!strchr (name, ':'))
92 fprintf (stderr, "%s: Must specify tcp connection as host:addr\n", name);
100 struct sockaddr_in sockaddr;
102 struct protoent *protoent;
105 port_str = strchr (name, ':');
107 port = atoi (port_str + 1);
109 tmp_desc = socket (PF_INET, SOCK_STREAM, 0);
111 perror_with_name ("Can't open socket");
113 /* Allow rapid reuse of this port. */
115 setsockopt (tmp_desc, SOL_SOCKET, SO_REUSEADDR, (char *)&tmp,
118 sockaddr.sin_family = PF_INET;
119 sockaddr.sin_port = htons(port);
120 sockaddr.sin_addr.s_addr = INADDR_ANY;
122 if (bind (tmp_desc, (struct sockaddr *)&sockaddr, sizeof (sockaddr))
123 || listen (tmp_desc, 1))
124 perror_with_name ("Can't bind address");
126 tmp = sizeof (sockaddr);
127 remote_desc = accept (tmp_desc, (struct sockaddr *)&sockaddr, &tmp);
128 if (remote_desc == -1)
129 perror_with_name ("Accept failed");
131 protoent = getprotobyname ("tcp");
133 perror_with_name ("getprotobyname");
135 /* Enable TCP keep alive process. */
137 setsockopt (tmp_desc, SOL_SOCKET, SO_KEEPALIVE, (char *)&tmp, sizeof(tmp));
139 /* Tell TCP not to delay small packets. This greatly speeds up
140 interactive response. */
142 setsockopt (remote_desc, protoent->p_proto, TCP_NODELAY,
143 (char *)&tmp, sizeof(tmp));
145 close (tmp_desc); /* No longer need this */
147 signal (SIGPIPE, SIG_IGN); /* If we don't do this, then gdbreplay simply
148 exits when the remote side dies. */
151 fcntl (remote_desc, F_SETFL, FASYNC);
153 fprintf (stderr, "Replay logfile using %s\n", name);
157 static int tohex (ch)
160 if (ch >= '0' && ch <= '9')
164 if (ch >= 'A' && ch <= 'F')
166 return (ch - 'A' + 10);
168 if (ch >= 'a' && ch <= 'f')
170 return (ch - 'a' + 10);
172 fprintf (stderr, "\nInvalid hex digit '%c'\n", ch);
199 case 'b': ch = '\b'; break;
200 case 'f': ch = '\f'; break;
201 case 'n': ch = '\n'; break;
202 case 'r': ch = '\r'; break;
203 case 't': ch = '\t'; break;
204 case 'v': ch = '\v'; break;
209 ch = tohex (ch2) << 4;
216 /* Treat any other char as just itself */
225 /* Accept input from gdb and match with chars from fp (after skipping one
226 blank) up until a \n is read from fp (which is not matched) */
233 unsigned char fromgdb;
235 if ((fromlog = logchar (fp)) != ' ')
237 sync_error (fp, "Sync error during gdb read of leading blank", ' ',
242 fromlog = logchar (fp);
247 read (remote_desc, &fromgdb, 1);
248 } while (fromlog == fromgdb);
251 sync_error (fp, "Sync error during read of gdb packet", fromlog,
256 /* Play data back to gdb from fp (after skipping leading blank) up until a
257 \n is read from fp (which is discarded and not sent to gdb). */
266 if ((fromlog = logchar (fp)) != ' ')
268 sync_error (fp, "Sync error skipping blank during write to gdb", ' ',
271 while ((fromlog = logchar (fp)) != EOL)
274 write (remote_desc, &ch, 1);
288 fprintf (stderr, "Usage: gdbreplay <logfile> <host:port>\n");
292 fp = fopen (argv[1], "r");
295 perror_with_name (argv[1]);
297 remote_open (argv[2]);
298 while ((ch = logchar (fp)) != EOF)
303 /* data sent from gdb to gdbreplay, accept and match it */
307 /* data sent from gdbreplay to gdb, play it */
311 /* Command executed by gdb */
312 while ((ch = logchar (fp)) != EOL);