1 /* Replay a remote debug session logfile for GDB.
2 Copyright (C) 1996-2014 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/>. */
21 #include "build-gnulib-gdbserver/config.h"
39 #ifdef HAVE_NETINET_IN_H
40 #include <netinet/in.h>
42 #ifdef HAVE_SYS_SOCKET_H
43 #include <sys/socket.h>
48 #if HAVE_NETINET_TCP_H
49 #include <netinet/tcp.h>
61 #ifndef HAVE_SOCKLEN_T
62 typedef int socklen_t;
65 /* Sort of a hack... */
68 static int remote_desc;
73 #define COUNTOF(STR) (sizeof (STR) / sizeof ((STR)[0]))
76 #define errno (GetLastError ())
79 strerror (DWORD error)
81 static char buf[1024];
83 DWORD lasterr = GetLastError ();
84 DWORD chars = FormatMessageW (FORMAT_MESSAGE_FROM_SYSTEM
85 | FORMAT_MESSAGE_ALLOCATE_BUFFER,
88 0, /* Default language */
94 /* If there is an \r\n appended, zap it. */
96 && msgbuf[chars - 2] == '\r'
97 && msgbuf[chars - 1] == '\n')
103 if (chars > ((COUNTOF (buf)) - 1))
105 chars = COUNTOF (buf) - 1;
109 wcstombs (buf, msgbuf, chars + 1);
113 sprintf (buf, "unknown win32 error (%ld)", error);
115 SetLastError (lasterr);
119 #endif /* __MINGW32CE__ */
121 /* Print the system error message for errno, and also mention STRING
122 as the file name for which the error was encountered.
123 Then return to command level. */
126 perror_with_name (const char *string)
134 err = strerror (errno);
136 err = "unknown error";
138 combined = (char *) alloca (strlen (err) + strlen (string) + 3);
139 strcpy (combined, string);
140 strcat (combined, ": ");
141 strcat (combined, err);
142 fprintf (stderr, "\n%s.\n", combined);
148 sync_error (FILE *fp, char *desc, int expect, int got)
150 fprintf (stderr, "\n%s\n", desc);
151 fprintf (stderr, "At logfile offset %ld, expected '0x%x' got '0x%x'\n",
152 ftell (fp), expect, got);
158 remote_error (const char *desc)
160 fprintf (stderr, "\n%s\n", desc);
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,
237 (char *) &tmp, sizeof (tmp));
239 /* Tell TCP not to delay small packets. This greatly speeds up
240 interactive response. */
242 setsockopt (remote_desc, IPPROTO_TCP, TCP_NODELAY,
243 (char *) &tmp, sizeof (tmp));
246 close (tmp_desc); /* No longer need this */
248 signal (SIGPIPE, SIG_IGN); /* If we don't do this, then
249 gdbreplay simply exits when
250 the remote side dies. */
252 closesocket (tmp_desc); /* No longer need this */
256 #if defined(F_SETFL) && defined (FASYNC)
257 fcntl (remote_desc, F_SETFL, FASYNC);
260 fprintf (stderr, "Replay logfile using %s\n", name);
267 if (ch >= '0' && ch <= '9')
271 if (ch >= 'A' && ch <= 'F')
273 return (ch - 'A' + 10);
275 if (ch >= 'a' && ch <= 'f')
277 return (ch - 'a' + 10);
279 fprintf (stderr, "\nInvalid hex digit '%c'\n", ch);
328 ch = tohex (ch2) << 4;
335 /* Treat any other char as just itself */
347 unsigned char fromgdb;
349 if (read (desc, &fromgdb, 1) != 1)
355 /* Accept input from gdb and match with chars from fp (after skipping one
356 blank) up until a \n is read from fp (which is not matched) */
364 if ((fromlog = logchar (fp)) != ' ')
366 sync_error (fp, "Sync error during gdb read of leading blank", ' ',
371 fromlog = logchar (fp);
374 fromgdb = gdbchar (remote_desc);
376 remote_error ("Error during read from gdb");
378 while (fromlog == fromgdb);
382 sync_error (fp, "Sync error during read of gdb packet from log", fromlog,
387 /* Play data back to gdb from fp (after skipping leading blank) up until a
388 \n is read from fp (which is discarded and not sent to gdb). */
396 if ((fromlog = logchar (fp)) != ' ')
398 sync_error (fp, "Sync error skipping blank during write to gdb", ' ',
401 while ((fromlog = logchar (fp)) != EOL)
404 if (write (remote_desc, &ch, 1) != 1)
405 remote_error ("Error during write to gdb");
410 gdbreplay_version (void)
412 printf ("GNU gdbreplay %s%s\n"
413 "Copyright (C) 2014 Free Software Foundation, Inc.\n"
414 "gdbreplay is free software, covered by "
415 "the GNU General Public License.\n"
416 "This gdbreplay was configured as \"%s\"\n",
417 PKGVERSION, version, host_name);
421 gdbreplay_usage (FILE *stream)
423 fprintf (stream, "Usage:\tgdbreplay <logfile> <host:port>\n");
424 if (REPORT_BUGS_TO[0] && stream == stdout)
425 fprintf (stream, "Report bugs to \"%s\".\n", REPORT_BUGS_TO);
429 main (int argc, char *argv[])
434 if (argc >= 2 && strcmp (argv[1], "--version") == 0)
436 gdbreplay_version ();
439 if (argc >= 2 && strcmp (argv[1], "--help") == 0)
441 gdbreplay_usage (stdout);
447 gdbreplay_usage (stderr);
450 fp = fopen (argv[1], "r");
453 perror_with_name (argv[1]);
455 remote_open (argv[2]);
456 while ((ch = logchar (fp)) != EOF)
461 /* data sent from gdb to gdbreplay, accept and match it */
465 /* data sent from gdbreplay to gdb, play it */
469 /* Command executed by gdb */
470 while ((ch = logchar (fp)) != EOL);