Commit | Line | Data |
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c906108c | 1 | /* Replay a remote debug session logfile for GDB. |
618f726f | 2 | Copyright (C) 1996-2016 Free Software Foundation, Inc. |
c906108c SS |
3 | Written by Fred Fish (fnf@cygnus.com) from pieces of gdbserver. |
4 | ||
c5aa993b | 5 | This file is part of GDB. |
c906108c | 6 | |
c5aa993b JM |
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 | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 10 | (at your option) any later version. |
c906108c | 11 | |
c5aa993b JM |
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. | |
c906108c | 16 | |
c5aa993b | 17 | You should have received a copy of the GNU General Public License |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c | 19 | |
5c44784c | 20 | #include "config.h" |
406b1477 | 21 | #include "build-gnulib-gdbserver/config.h" |
01208463 | 22 | #include "version.h" |
406b1477 | 23 | |
c906108c | 24 | #include <stdio.h> |
68070c10 | 25 | #if HAVE_SYS_FILE_H |
c906108c | 26 | #include <sys/file.h> |
68070c10 PA |
27 | #endif |
28 | #if HAVE_SIGNAL_H | |
c906108c | 29 | #include <signal.h> |
68070c10 | 30 | #endif |
c906108c | 31 | #include <ctype.h> |
68070c10 | 32 | #if HAVE_FCNTL_H |
c906108c | 33 | #include <fcntl.h> |
68070c10 | 34 | #endif |
5c44784c | 35 | #include <errno.h> |
82e0fd98 | 36 | #include <stdlib.h> |
0729219d | 37 | #include <string.h> |
82e0fd98 | 38 | #include <unistd.h> |
9eb1356e PA |
39 | #ifdef HAVE_NETINET_IN_H |
40 | #include <netinet/in.h> | |
41 | #endif | |
42 | #ifdef HAVE_SYS_SOCKET_H | |
43 | #include <sys/socket.h> | |
44 | #endif | |
b80864fb DJ |
45 | #if HAVE_NETDB_H |
46 | #include <netdb.h> | |
47 | #endif | |
48 | #if HAVE_NETINET_TCP_H | |
49 | #include <netinet/tcp.h> | |
50 | #endif | |
9c232dda | 51 | |
a778ab81 | 52 | #include <alloca.h> |
9c232dda | 53 | |
9eb1356e PA |
54 | #if USE_WIN32API |
55 | #include <winsock2.h> | |
56 | #endif | |
c906108c | 57 | |
f450004a DJ |
58 | #ifndef HAVE_SOCKLEN_T |
59 | typedef int socklen_t; | |
60 | #endif | |
61 | ||
c906108c SS |
62 | /* Sort of a hack... */ |
63 | #define EOL (EOF - 1) | |
64 | ||
65 | static int remote_desc; | |
66 | ||
68070c10 PA |
67 | #ifdef __MINGW32CE__ |
68 | ||
69 | #ifndef COUNTOF | |
70 | #define COUNTOF(STR) (sizeof (STR) / sizeof ((STR)[0])) | |
71 | #endif | |
72 | ||
73 | #define errno (GetLastError ()) | |
74 | ||
75 | char * | |
76 | strerror (DWORD error) | |
77 | { | |
78 | static char buf[1024]; | |
79 | WCHAR *msgbuf; | |
80 | DWORD lasterr = GetLastError (); | |
81 | DWORD chars = FormatMessageW (FORMAT_MESSAGE_FROM_SYSTEM | |
82 | | FORMAT_MESSAGE_ALLOCATE_BUFFER, | |
83 | NULL, | |
84 | error, | |
85 | 0, /* Default language */ | |
86 | (LPVOID)&msgbuf, | |
87 | 0, | |
88 | NULL); | |
89 | if (chars != 0) | |
90 | { | |
91 | /* If there is an \r\n appended, zap it. */ | |
92 | if (chars >= 2 | |
93 | && msgbuf[chars - 2] == '\r' | |
94 | && msgbuf[chars - 1] == '\n') | |
95 | { | |
96 | chars -= 2; | |
97 | msgbuf[chars] = 0; | |
98 | } | |
99 | ||
100 | if (chars > ((COUNTOF (buf)) - 1)) | |
101 | { | |
102 | chars = COUNTOF (buf) - 1; | |
103 | msgbuf [chars] = 0; | |
104 | } | |
105 | ||
106 | wcstombs (buf, msgbuf, chars + 1); | |
107 | LocalFree (msgbuf); | |
108 | } | |
109 | else | |
110 | sprintf (buf, "unknown win32 error (%ld)", error); | |
111 | ||
112 | SetLastError (lasterr); | |
113 | return buf; | |
114 | } | |
115 | ||
116 | #endif /* __MINGW32CE__ */ | |
117 | ||
c906108c SS |
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. */ | |
121 | ||
82e0fd98 | 122 | static void |
54363045 | 123 | perror_with_name (const char *string) |
c906108c | 124 | { |
5c44784c | 125 | #ifndef STDC_HEADERS |
c906108c | 126 | extern int errno; |
5c44784c JM |
127 | #endif |
128 | const char *err; | |
c906108c SS |
129 | char *combined; |
130 | ||
43d5792c DJ |
131 | err = strerror (errno); |
132 | if (err == NULL) | |
133 | err = "unknown error"; | |
134 | ||
c906108c SS |
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); | |
140 | fflush (stderr); | |
141 | exit (1); | |
142 | } | |
143 | ||
144 | static void | |
fba45db2 | 145 | sync_error (FILE *fp, char *desc, int expect, int got) |
c906108c SS |
146 | { |
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); | |
150 | fflush (stderr); | |
151 | exit (1); | |
152 | } | |
153 | ||
e581f2b4 PA |
154 | static void |
155 | remote_error (const char *desc) | |
156 | { | |
157 | fprintf (stderr, "\n%s\n", desc); | |
158 | fflush (stderr); | |
159 | exit (1); | |
160 | } | |
161 | ||
82e0fd98 | 162 | static void |
fba45db2 | 163 | remote_close (void) |
c906108c | 164 | { |
b80864fb DJ |
165 | #ifdef USE_WIN32API |
166 | closesocket (remote_desc); | |
167 | #else | |
c906108c | 168 | close (remote_desc); |
b80864fb | 169 | #endif |
c906108c SS |
170 | } |
171 | ||
172 | /* Open a connection to a remote debugger. | |
173 | NAME is the filename used for communication. */ | |
174 | ||
82e0fd98 | 175 | static void |
fba45db2 | 176 | remote_open (char *name) |
c906108c | 177 | { |
c906108c SS |
178 | if (!strchr (name, ':')) |
179 | { | |
180 | fprintf (stderr, "%s: Must specify tcp connection as host:addr\n", name); | |
181 | fflush (stderr); | |
182 | exit (1); | |
183 | } | |
184 | else | |
185 | { | |
b80864fb DJ |
186 | #ifdef USE_WIN32API |
187 | static int winsock_initialized; | |
188 | #endif | |
c906108c SS |
189 | char *port_str; |
190 | int port; | |
9eb1356e | 191 | struct sockaddr_in sockaddr; |
f450004a | 192 | socklen_t tmp; |
c906108c SS |
193 | int tmp_desc; |
194 | ||
195 | port_str = strchr (name, ':'); | |
196 | ||
197 | port = atoi (port_str + 1); | |
198 | ||
b80864fb DJ |
199 | #ifdef USE_WIN32API |
200 | if (!winsock_initialized) | |
201 | { | |
202 | WSADATA wsad; | |
203 | ||
204 | WSAStartup (MAKEWORD (1, 0), &wsad); | |
205 | winsock_initialized = 1; | |
206 | } | |
207 | #endif | |
208 | ||
c906108c | 209 | tmp_desc = socket (PF_INET, SOCK_STREAM, 0); |
363a6e9f | 210 | if (tmp_desc == -1) |
c906108c SS |
211 | perror_with_name ("Can't open socket"); |
212 | ||
213 | /* Allow rapid reuse of this port. */ | |
214 | tmp = 1; | |
c5aa993b JM |
215 | setsockopt (tmp_desc, SOL_SOCKET, SO_REUSEADDR, (char *) &tmp, |
216 | sizeof (tmp)); | |
c906108c | 217 | |
9eb1356e PA |
218 | sockaddr.sin_family = PF_INET; |
219 | sockaddr.sin_port = htons (port); | |
220 | sockaddr.sin_addr.s_addr = INADDR_ANY; | |
c906108c | 221 | |
9eb1356e | 222 | if (bind (tmp_desc, (struct sockaddr *) &sockaddr, sizeof (sockaddr)) |
c906108c SS |
223 | || listen (tmp_desc, 1)) |
224 | perror_with_name ("Can't bind address"); | |
225 | ||
9eb1356e PA |
226 | tmp = sizeof (sockaddr); |
227 | remote_desc = accept (tmp_desc, (struct sockaddr *) &sockaddr, &tmp); | |
c906108c SS |
228 | if (remote_desc == -1) |
229 | perror_with_name ("Accept failed"); | |
230 | ||
c906108c SS |
231 | /* Enable TCP keep alive process. */ |
232 | tmp = 1; | |
493e2a69 MS |
233 | setsockopt (tmp_desc, SOL_SOCKET, SO_KEEPALIVE, |
234 | (char *) &tmp, sizeof (tmp)); | |
c906108c SS |
235 | |
236 | /* Tell TCP not to delay small packets. This greatly speeds up | |
1b3f6016 | 237 | interactive response. */ |
c906108c | 238 | tmp = 1; |
373fe97f | 239 | setsockopt (remote_desc, IPPROTO_TCP, TCP_NODELAY, |
c5aa993b | 240 | (char *) &tmp, sizeof (tmp)); |
c906108c | 241 | |
b80864fb DJ |
242 | #ifndef USE_WIN32API |
243 | close (tmp_desc); /* No longer need this */ | |
244 | ||
493e2a69 MS |
245 | signal (SIGPIPE, SIG_IGN); /* If we don't do this, then |
246 | gdbreplay simply exits when | |
247 | the remote side dies. */ | |
b80864fb DJ |
248 | #else |
249 | closesocket (tmp_desc); /* No longer need this */ | |
250 | #endif | |
c906108c SS |
251 | } |
252 | ||
b80864fb | 253 | #if defined(F_SETFL) && defined (FASYNC) |
c906108c | 254 | fcntl (remote_desc, F_SETFL, FASYNC); |
b80864fb | 255 | #endif |
c906108c SS |
256 | |
257 | fprintf (stderr, "Replay logfile using %s\n", name); | |
258 | fflush (stderr); | |
259 | } | |
260 | ||
c5aa993b | 261 | static int |
909c2cda | 262 | fromhex (int ch) |
c906108c SS |
263 | { |
264 | if (ch >= '0' && ch <= '9') | |
265 | { | |
266 | return (ch - '0'); | |
267 | } | |
268 | if (ch >= 'A' && ch <= 'F') | |
269 | { | |
270 | return (ch - 'A' + 10); | |
271 | } | |
272 | if (ch >= 'a' && ch <= 'f') | |
273 | { | |
274 | return (ch - 'a' + 10); | |
275 | } | |
276 | fprintf (stderr, "\nInvalid hex digit '%c'\n", ch); | |
277 | fflush (stderr); | |
278 | exit (1); | |
279 | } | |
280 | ||
281 | static int | |
fba45db2 | 282 | logchar (FILE *fp) |
c906108c SS |
283 | { |
284 | int ch; | |
285 | int ch2; | |
286 | ||
287 | ch = fgetc (fp); | |
288 | fputc (ch, stdout); | |
289 | fflush (stdout); | |
290 | switch (ch) | |
291 | { | |
292 | case '\n': | |
293 | ch = EOL; | |
294 | break; | |
295 | case '\\': | |
296 | ch = fgetc (fp); | |
297 | fputc (ch, stdout); | |
298 | fflush (stdout); | |
299 | switch (ch) | |
300 | { | |
c5aa993b JM |
301 | case '\\': |
302 | break; | |
303 | case 'b': | |
304 | ch = '\b'; | |
305 | break; | |
306 | case 'f': | |
307 | ch = '\f'; | |
308 | break; | |
309 | case 'n': | |
310 | ch = '\n'; | |
311 | break; | |
312 | case 'r': | |
313 | ch = '\r'; | |
314 | break; | |
315 | case 't': | |
316 | ch = '\t'; | |
317 | break; | |
318 | case 'v': | |
319 | ch = '\v'; | |
320 | break; | |
c906108c SS |
321 | case 'x': |
322 | ch2 = fgetc (fp); | |
323 | fputc (ch2, stdout); | |
324 | fflush (stdout); | |
909c2cda | 325 | ch = fromhex (ch2) << 4; |
c906108c SS |
326 | ch2 = fgetc (fp); |
327 | fputc (ch2, stdout); | |
328 | fflush (stdout); | |
909c2cda | 329 | ch |= fromhex (ch2); |
c906108c SS |
330 | break; |
331 | default: | |
332 | /* Treat any other char as just itself */ | |
333 | break; | |
334 | } | |
335 | default: | |
336 | break; | |
337 | } | |
338 | return (ch); | |
339 | } | |
340 | ||
e581f2b4 PA |
341 | static int |
342 | gdbchar (int desc) | |
343 | { | |
344 | unsigned char fromgdb; | |
345 | ||
346 | if (read (desc, &fromgdb, 1) != 1) | |
347 | return -1; | |
348 | else | |
349 | return fromgdb; | |
350 | } | |
351 | ||
c906108c SS |
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) */ | |
354 | ||
82e0fd98 | 355 | static void |
fba45db2 | 356 | expect (FILE *fp) |
c906108c SS |
357 | { |
358 | int fromlog; | |
e581f2b4 | 359 | int fromgdb; |
c906108c SS |
360 | |
361 | if ((fromlog = logchar (fp)) != ' ') | |
362 | { | |
363 | sync_error (fp, "Sync error during gdb read of leading blank", ' ', | |
364 | fromlog); | |
365 | } | |
366 | do | |
367 | { | |
368 | fromlog = logchar (fp); | |
369 | if (fromlog == EOL) | |
e581f2b4 PA |
370 | break; |
371 | fromgdb = gdbchar (remote_desc); | |
372 | if (fromgdb < 0) | |
373 | remote_error ("Error during read from gdb"); | |
c5aa993b JM |
374 | } |
375 | while (fromlog == fromgdb); | |
e581f2b4 | 376 | |
c906108c SS |
377 | if (fromlog != EOL) |
378 | { | |
e581f2b4 | 379 | sync_error (fp, "Sync error during read of gdb packet from log", fromlog, |
c906108c SS |
380 | fromgdb); |
381 | } | |
382 | } | |
383 | ||
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). */ | |
386 | ||
82e0fd98 | 387 | static void |
fba45db2 | 388 | play (FILE *fp) |
c906108c SS |
389 | { |
390 | int fromlog; | |
391 | char ch; | |
392 | ||
393 | if ((fromlog = logchar (fp)) != ' ') | |
394 | { | |
395 | sync_error (fp, "Sync error skipping blank during write to gdb", ' ', | |
396 | fromlog); | |
397 | } | |
398 | while ((fromlog = logchar (fp)) != EOL) | |
399 | { | |
400 | ch = fromlog; | |
e581f2b4 PA |
401 | if (write (remote_desc, &ch, 1) != 1) |
402 | remote_error ("Error during write to gdb"); | |
c906108c SS |
403 | } |
404 | } | |
405 | ||
c16158bc JM |
406 | static void |
407 | gdbreplay_version (void) | |
408 | { | |
409 | printf ("GNU gdbreplay %s%s\n" | |
edd88788 | 410 | "Copyright (C) 2016 Free Software Foundation, Inc.\n" |
493e2a69 MS |
411 | "gdbreplay is free software, covered by " |
412 | "the GNU General Public License.\n" | |
90aa6a40 | 413 | "This gdbreplay was configured as \"%s\"\n", |
c16158bc JM |
414 | PKGVERSION, version, host_name); |
415 | } | |
416 | ||
417 | static void | |
418 | gdbreplay_usage (FILE *stream) | |
419 | { | |
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); | |
423 | } | |
424 | ||
c906108c | 425 | int |
da85418c | 426 | main (int argc, char *argv[]) |
c906108c SS |
427 | { |
428 | FILE *fp; | |
429 | int ch; | |
430 | ||
c16158bc JM |
431 | if (argc >= 2 && strcmp (argv[1], "--version") == 0) |
432 | { | |
433 | gdbreplay_version (); | |
434 | exit (0); | |
435 | } | |
436 | if (argc >= 2 && strcmp (argv[1], "--help") == 0) | |
437 | { | |
438 | gdbreplay_usage (stdout); | |
439 | exit (0); | |
440 | } | |
441 | ||
c906108c SS |
442 | if (argc < 3) |
443 | { | |
c16158bc | 444 | gdbreplay_usage (stderr); |
c906108c SS |
445 | exit (1); |
446 | } | |
447 | fp = fopen (argv[1], "r"); | |
448 | if (fp == NULL) | |
449 | { | |
450 | perror_with_name (argv[1]); | |
c5aa993b | 451 | } |
c906108c SS |
452 | remote_open (argv[2]); |
453 | while ((ch = logchar (fp)) != EOF) | |
454 | { | |
455 | switch (ch) | |
456 | { | |
457 | case 'w': | |
458 | /* data sent from gdb to gdbreplay, accept and match it */ | |
459 | expect (fp); | |
460 | break; | |
461 | case 'r': | |
462 | /* data sent from gdbreplay to gdb, play it */ | |
463 | play (fp); | |
464 | break; | |
465 | case 'c': | |
466 | /* Command executed by gdb */ | |
467 | while ((ch = logchar (fp)) != EOL); | |
468 | break; | |
469 | } | |
470 | } | |
471 | remote_close (); | |
472 | exit (0); | |
473 | } |