1 /* Replay a remote debug session logfile for GDB.
2 Copyright (C) 1996-2015 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>
58 #ifndef HAVE_SOCKLEN_T
59 typedef int socklen_t;
62 /* Sort of a hack... */
65 static int remote_desc;
70 #define COUNTOF(STR) (sizeof (STR) / sizeof ((STR)[0]))
73 #define errno (GetLastError ())
76 strerror (DWORD error)
78 static char buf[1024];
80 DWORD lasterr = GetLastError ();
81 DWORD chars = FormatMessageW (FORMAT_MESSAGE_FROM_SYSTEM
82 | FORMAT_MESSAGE_ALLOCATE_BUFFER,
85 0, /* Default language */
91 /* If there is an \r\n appended, zap it. */
93 && msgbuf[chars - 2] == '\r'
94 && msgbuf[chars - 1] == '\n')
100 if (chars > ((COUNTOF (buf)) - 1))
102 chars = COUNTOF (buf) - 1;
106 wcstombs (buf, msgbuf, chars + 1);
110 sprintf (buf, "unknown win32 error (%ld)", error);
112 SetLastError (lasterr);
116 #endif /* __MINGW32CE__ */
118 /* Print the system error message for errno, and also mention STRING
119 as the file name for which the error was encountered.
120 Then return to command level. */
123 perror_with_name (const char *string)
131 err = strerror (errno);
133 err = "unknown error";
135 combined = (char *) alloca (strlen (err) + strlen (string) + 3);
136 strcpy (combined, string);
137 strcat (combined, ": ");
138 strcat (combined, err);
139 fprintf (stderr, "\n%s.\n", combined);
145 sync_error (FILE *fp, char *desc, int expect, int got)
147 fprintf (stderr, "\n%s\n", desc);
148 fprintf (stderr, "At logfile offset %ld, expected '0x%x' got '0x%x'\n",
149 ftell (fp), expect, got);
155 remote_error (const char *desc)
157 fprintf (stderr, "\n%s\n", desc);
166 closesocket (remote_desc);
172 /* Open a connection to a remote debugger.
173 NAME is the filename used for communication. */
176 remote_open (char *name)
178 if (!strchr (name, ':'))
180 fprintf (stderr, "%s: Must specify tcp connection as host:addr\n", name);
187 static int winsock_initialized;
191 struct sockaddr_in sockaddr;
195 port_str = strchr (name, ':');
197 port = atoi (port_str + 1);
200 if (!winsock_initialized)
204 WSAStartup (MAKEWORD (1, 0), &wsad);
205 winsock_initialized = 1;
209 tmp_desc = socket (PF_INET, SOCK_STREAM, 0);
211 perror_with_name ("Can't open socket");
213 /* Allow rapid reuse of this port. */
215 setsockopt (tmp_desc, SOL_SOCKET, SO_REUSEADDR, (char *) &tmp,
218 sockaddr.sin_family = PF_INET;
219 sockaddr.sin_port = htons (port);
220 sockaddr.sin_addr.s_addr = INADDR_ANY;
222 if (bind (tmp_desc, (struct sockaddr *) &sockaddr, sizeof (sockaddr))
223 || listen (tmp_desc, 1))
224 perror_with_name ("Can't bind address");
226 tmp = sizeof (sockaddr);
227 remote_desc = accept (tmp_desc, (struct sockaddr *) &sockaddr, &tmp);
228 if (remote_desc == -1)
229 perror_with_name ("Accept failed");
231 /* Enable TCP keep alive process. */
233 setsockopt (tmp_desc, SOL_SOCKET, SO_KEEPALIVE,
234 (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
246 gdbreplay simply exits when
247 the remote side dies. */
249 closesocket (tmp_desc); /* No longer need this */
253 #if defined(F_SETFL) && defined (FASYNC)
254 fcntl (remote_desc, F_SETFL, FASYNC);
257 fprintf (stderr, "Replay logfile using %s\n", name);
264 if (ch >= '0' && ch <= '9')
268 if (ch >= 'A' && ch <= 'F')
270 return (ch - 'A' + 10);
272 if (ch >= 'a' && ch <= 'f')
274 return (ch - 'a' + 10);
276 fprintf (stderr, "\nInvalid hex digit '%c'\n", ch);
325 ch = fromhex (ch2) << 4;
332 /* Treat any other char as just itself */
344 unsigned char fromgdb;
346 if (read (desc, &fromgdb, 1) != 1)
352 /* Accept input from gdb and match with chars from fp (after skipping one
353 blank) up until a \n is read from fp (which is not matched) */
361 if ((fromlog = logchar (fp)) != ' ')
363 sync_error (fp, "Sync error during gdb read of leading blank", ' ',
368 fromlog = logchar (fp);
371 fromgdb = gdbchar (remote_desc);
373 remote_error ("Error during read from gdb");
375 while (fromlog == fromgdb);
379 sync_error (fp, "Sync error during read of gdb packet from log", fromlog,
384 /* Play data back to gdb from fp (after skipping leading blank) up until a
385 \n is read from fp (which is discarded and not sent to gdb). */
393 if ((fromlog = logchar (fp)) != ' ')
395 sync_error (fp, "Sync error skipping blank during write to gdb", ' ',
398 while ((fromlog = logchar (fp)) != EOL)
401 if (write (remote_desc, &ch, 1) != 1)
402 remote_error ("Error during write to gdb");
407 gdbreplay_version (void)
409 printf ("GNU gdbreplay %s%s\n"
410 "Copyright (C) 2015 Free Software Foundation, Inc.\n"
411 "gdbreplay is free software, covered by "
412 "the GNU General Public License.\n"
413 "This gdbreplay was configured as \"%s\"\n",
414 PKGVERSION, version, host_name);
418 gdbreplay_usage (FILE *stream)
420 fprintf (stream, "Usage:\tgdbreplay <logfile> <host:port>\n");
421 if (REPORT_BUGS_TO[0] && stream == stdout)
422 fprintf (stream, "Report bugs to \"%s\".\n", REPORT_BUGS_TO);
426 main (int argc, char *argv[])
431 if (argc >= 2 && strcmp (argv[1], "--version") == 0)
433 gdbreplay_version ();
436 if (argc >= 2 && strcmp (argv[1], "--help") == 0)
438 gdbreplay_usage (stdout);
444 gdbreplay_usage (stderr);
447 fp = fopen (argv[1], "r");
450 perror_with_name (argv[1]);
452 remote_open (argv[2]);
453 while ((ch = logchar (fp)) != EOF)
458 /* data sent from gdb to gdbreplay, accept and match it */
462 /* data sent from gdbreplay to gdb, play it */
466 /* Command executed by gdb */
467 while ((ch = logchar (fp)) != EOL);