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"
42 #if HAVE_NETINET_TCP_H
43 #include <netinet/tcp.h>
45 #include "gdb_socket.h"
50 #ifndef HAVE_SOCKLEN_T
51 typedef int socklen_t;
54 /* Sort of a hack... */
57 static int remote_desc;
62 #define COUNTOF(STR) (sizeof (STR) / sizeof ((STR)[0]))
65 #define errno (GetLastError ())
68 strerror (DWORD error)
70 static char buf[1024];
72 DWORD lasterr = GetLastError ();
73 DWORD chars = FormatMessageW (FORMAT_MESSAGE_FROM_SYSTEM
74 | FORMAT_MESSAGE_ALLOCATE_BUFFER,
77 0, /* Default language */
83 /* If there is an \r\n appended, zap it. */
85 && msgbuf[chars - 2] == '\r'
86 && msgbuf[chars - 1] == '\n')
92 if (chars > ((COUNTOF (buf)) - 1))
94 chars = COUNTOF (buf) - 1;
98 wcstombs (buf, msgbuf, chars + 1);
102 sprintf (buf, "unknown win32 error (%ld)", error);
104 SetLastError (lasterr);
108 #endif /* __MINGW32CE__ */
110 /* Print the system error message for errno, and also mention STRING
111 as the file name for which the error was encountered.
112 Then return to command level. */
115 perror_with_name (const char *string)
123 err = strerror (errno);
125 err = "unknown error";
127 combined = (char *) alloca (strlen (err) + strlen (string) + 3);
128 strcpy (combined, string);
129 strcat (combined, ": ");
130 strcat (combined, err);
131 fprintf (stderr, "\n%s.\n", combined);
137 sync_error (FILE *fp, char *desc, int expect, int got)
139 fprintf (stderr, "\n%s\n", desc);
140 fprintf (stderr, "At logfile offset %ld, expected '0x%x' got '0x%x'\n",
141 ftell (fp), expect, got);
147 remote_error (const char *desc)
149 fprintf (stderr, "\n%s\n", desc);
158 closesocket (remote_desc);
164 /* Open a connection to a remote debugger.
165 NAME is the filename used for communication. */
168 remote_open (char *name)
170 if (!strchr (name, ':'))
172 fprintf (stderr, "%s: Must specify tcp connection as host:addr\n", name);
179 static int winsock_initialized;
183 union gdb_sockaddr_u sockaddr;
187 port_str = strchr (name, ':');
189 port = atoi (port_str + 1);
192 if (!winsock_initialized)
196 WSAStartup (MAKEWORD (1, 0), &wsad);
197 winsock_initialized = 1;
201 tmp_desc = socket (PF_INET, SOCK_STREAM, 0);
203 perror_with_name ("Can't open socket");
205 /* Allow rapid reuse of this port. */
207 setsockopt (tmp_desc, SOL_SOCKET, SO_REUSEADDR, (char *) &tmp,
210 sockaddr.sa_in.sin_family = PF_INET;
211 sockaddr.sa_in.sin_port = htons (port);
212 sockaddr.sa_in.sin_addr.s_addr = INADDR_ANY;
214 if (bind (tmp_desc, &sockaddr.sa, sizeof (sockaddr.sa_in))
215 || listen (tmp_desc, 1))
216 perror_with_name ("Can't bind address");
218 tmp = sizeof (sockaddr.sa_in);
219 remote_desc = accept (tmp_desc, &sockaddr.sa, &tmp);
220 if (remote_desc == -1)
221 perror_with_name ("Accept failed");
223 /* Enable TCP keep alive process. */
225 setsockopt (tmp_desc, SOL_SOCKET, SO_KEEPALIVE,
226 (char *) &tmp, sizeof (tmp));
228 /* Tell TCP not to delay small packets. This greatly speeds up
229 interactive response. */
231 setsockopt (remote_desc, IPPROTO_TCP, TCP_NODELAY,
232 (char *) &tmp, sizeof (tmp));
235 close (tmp_desc); /* No longer need this */
237 signal (SIGPIPE, SIG_IGN); /* If we don't do this, then
238 gdbreplay simply exits when
239 the remote side dies. */
241 closesocket (tmp_desc); /* No longer need this */
245 #if defined(F_SETFL) && defined (FASYNC)
246 fcntl (remote_desc, F_SETFL, FASYNC);
249 fprintf (stderr, "Replay logfile using %s\n", name);
256 if (ch >= '0' && ch <= '9')
260 if (ch >= 'A' && ch <= 'F')
262 return (ch - 'A' + 10);
264 if (ch >= 'a' && ch <= 'f')
266 return (ch - 'a' + 10);
268 fprintf (stderr, "\nInvalid hex digit '%c'\n", ch);
317 ch = tohex (ch2) << 4;
324 /* Treat any other char as just itself */
336 unsigned char fromgdb;
338 if (read (desc, &fromgdb, 1) != 1)
344 /* Accept input from gdb and match with chars from fp (after skipping one
345 blank) up until a \n is read from fp (which is not matched) */
353 if ((fromlog = logchar (fp)) != ' ')
355 sync_error (fp, "Sync error during gdb read of leading blank", ' ',
360 fromlog = logchar (fp);
363 fromgdb = gdbchar (remote_desc);
365 remote_error ("Error during read from gdb");
367 while (fromlog == fromgdb);
371 sync_error (fp, "Sync error during read of gdb packet from log", fromlog,
376 /* Play data back to gdb from fp (after skipping leading blank) up until a
377 \n is read from fp (which is discarded and not sent to gdb). */
385 if ((fromlog = logchar (fp)) != ' ')
387 sync_error (fp, "Sync error skipping blank during write to gdb", ' ',
390 while ((fromlog = logchar (fp)) != EOL)
393 if (write (remote_desc, &ch, 1) != 1)
394 remote_error ("Error during write to gdb");
399 gdbreplay_version (void)
401 printf ("GNU gdbreplay %s%s\n"
402 "Copyright (C) 2015 Free Software Foundation, Inc.\n"
403 "gdbreplay is free software, covered by "
404 "the GNU General Public License.\n"
405 "This gdbreplay was configured as \"%s\"\n",
406 PKGVERSION, version, host_name);
410 gdbreplay_usage (FILE *stream)
412 fprintf (stream, "Usage:\tgdbreplay <logfile> <host:port>\n");
413 if (REPORT_BUGS_TO[0] && stream == stdout)
414 fprintf (stream, "Report bugs to \"%s\".\n", REPORT_BUGS_TO);
418 main (int argc, char *argv[])
423 if (argc >= 2 && strcmp (argv[1], "--version") == 0)
425 gdbreplay_version ();
428 if (argc >= 2 && strcmp (argv[1], "--help") == 0)
430 gdbreplay_usage (stdout);
436 gdbreplay_usage (stderr);
439 fp = fopen (argv[1], "r");
442 perror_with_name (argv[1]);
444 remote_open (argv[2]);
445 while ((ch = logchar (fp)) != EOF)
450 /* data sent from gdb to gdbreplay, accept and match it */
454 /* data sent from gdbreplay to gdb, play it */
458 /* Command executed by gdb */
459 while ((ch = logchar (fp)) != EOL);