Commit | Line | Data |
---|---|---|
c906108c | 1 | /* Replay a remote debug session logfile for GDB. |
6d782a97 | 2 | Copyright 1996, 1998, 1999, 2000, 2002, 2003 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 | |
9 | the Free Software Foundation; either version 2 of the License, or | |
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 JM |
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, | |
20 | Boston, MA 02111-1307, USA. */ | |
c906108c | 21 | |
5c44784c | 22 | #include "config.h" |
c906108c SS |
23 | #include <stdio.h> |
24 | #include <sys/file.h> | |
25 | #include <netinet/in.h> | |
26 | #include <sys/socket.h> | |
27 | #include <netdb.h> | |
28 | #include <netinet/tcp.h> | |
29 | #include <signal.h> | |
30 | #include <ctype.h> | |
31 | #include <fcntl.h> | |
5c44784c | 32 | #include <errno.h> |
0729219d | 33 | |
82e0fd98 DB |
34 | #ifdef HAVE_STDLIB_H |
35 | #include <stdlib.h> | |
36 | #endif | |
0729219d DJ |
37 | #ifdef HAVE_STRING_H |
38 | #include <string.h> | |
39 | #endif | |
82e0fd98 DB |
40 | #ifdef HAVE_UNISTD_H |
41 | #include <unistd.h> | |
42 | #endif | |
c906108c SS |
43 | |
44 | /* Sort of a hack... */ | |
45 | #define EOL (EOF - 1) | |
46 | ||
47 | static int remote_desc; | |
48 | ||
49 | /* Print the system error message for errno, and also mention STRING | |
50 | as the file name for which the error was encountered. | |
51 | Then return to command level. */ | |
52 | ||
82e0fd98 | 53 | static void |
fba45db2 | 54 | perror_with_name (char *string) |
c906108c | 55 | { |
5c44784c | 56 | #ifndef STDC_HEADERS |
c906108c | 57 | extern int errno; |
5c44784c JM |
58 | #endif |
59 | const char *err; | |
c906108c SS |
60 | char *combined; |
61 | ||
43d5792c DJ |
62 | err = strerror (errno); |
63 | if (err == NULL) | |
64 | err = "unknown error"; | |
65 | ||
c906108c SS |
66 | combined = (char *) alloca (strlen (err) + strlen (string) + 3); |
67 | strcpy (combined, string); | |
68 | strcat (combined, ": "); | |
69 | strcat (combined, err); | |
70 | fprintf (stderr, "\n%s.\n", combined); | |
71 | fflush (stderr); | |
72 | exit (1); | |
73 | } | |
74 | ||
75 | static void | |
fba45db2 | 76 | sync_error (FILE *fp, char *desc, int expect, int got) |
c906108c SS |
77 | { |
78 | fprintf (stderr, "\n%s\n", desc); | |
79 | fprintf (stderr, "At logfile offset %ld, expected '0x%x' got '0x%x'\n", | |
80 | ftell (fp), expect, got); | |
81 | fflush (stderr); | |
82 | exit (1); | |
83 | } | |
84 | ||
82e0fd98 | 85 | static void |
fba45db2 | 86 | remote_close (void) |
c906108c SS |
87 | { |
88 | close (remote_desc); | |
89 | } | |
90 | ||
91 | /* Open a connection to a remote debugger. | |
92 | NAME is the filename used for communication. */ | |
93 | ||
82e0fd98 | 94 | static void |
fba45db2 | 95 | remote_open (char *name) |
c906108c | 96 | { |
c906108c SS |
97 | if (!strchr (name, ':')) |
98 | { | |
99 | fprintf (stderr, "%s: Must specify tcp connection as host:addr\n", name); | |
100 | fflush (stderr); | |
101 | exit (1); | |
102 | } | |
103 | else | |
104 | { | |
105 | char *port_str; | |
106 | int port; | |
107 | struct sockaddr_in sockaddr; | |
108 | int tmp; | |
c906108c SS |
109 | int tmp_desc; |
110 | ||
111 | port_str = strchr (name, ':'); | |
112 | ||
113 | port = atoi (port_str + 1); | |
114 | ||
115 | tmp_desc = socket (PF_INET, SOCK_STREAM, 0); | |
116 | if (tmp_desc < 0) | |
117 | perror_with_name ("Can't open socket"); | |
118 | ||
119 | /* Allow rapid reuse of this port. */ | |
120 | tmp = 1; | |
c5aa993b JM |
121 | setsockopt (tmp_desc, SOL_SOCKET, SO_REUSEADDR, (char *) &tmp, |
122 | sizeof (tmp)); | |
c906108c SS |
123 | |
124 | sockaddr.sin_family = PF_INET; | |
c5aa993b | 125 | sockaddr.sin_port = htons (port); |
c906108c SS |
126 | sockaddr.sin_addr.s_addr = INADDR_ANY; |
127 | ||
c5aa993b | 128 | if (bind (tmp_desc, (struct sockaddr *) &sockaddr, sizeof (sockaddr)) |
c906108c SS |
129 | || listen (tmp_desc, 1)) |
130 | perror_with_name ("Can't bind address"); | |
131 | ||
132 | tmp = sizeof (sockaddr); | |
c5aa993b | 133 | remote_desc = accept (tmp_desc, (struct sockaddr *) &sockaddr, &tmp); |
c906108c SS |
134 | if (remote_desc == -1) |
135 | perror_with_name ("Accept failed"); | |
136 | ||
c906108c SS |
137 | /* Enable TCP keep alive process. */ |
138 | tmp = 1; | |
c5aa993b | 139 | setsockopt (tmp_desc, SOL_SOCKET, SO_KEEPALIVE, (char *) &tmp, sizeof (tmp)); |
c906108c SS |
140 | |
141 | /* Tell TCP not to delay small packets. This greatly speeds up | |
c5aa993b | 142 | interactive response. */ |
c906108c | 143 | tmp = 1; |
373fe97f | 144 | setsockopt (remote_desc, IPPROTO_TCP, TCP_NODELAY, |
c5aa993b | 145 | (char *) &tmp, sizeof (tmp)); |
c906108c SS |
146 | |
147 | close (tmp_desc); /* No longer need this */ | |
148 | ||
c5aa993b JM |
149 | signal (SIGPIPE, SIG_IGN); /* If we don't do this, then gdbreplay simply |
150 | exits when the remote side dies. */ | |
c906108c SS |
151 | } |
152 | ||
153 | fcntl (remote_desc, F_SETFL, FASYNC); | |
154 | ||
155 | fprintf (stderr, "Replay logfile using %s\n", name); | |
156 | fflush (stderr); | |
157 | } | |
158 | ||
c5aa993b | 159 | static int |
fba45db2 | 160 | tohex (int ch) |
c906108c SS |
161 | { |
162 | if (ch >= '0' && ch <= '9') | |
163 | { | |
164 | return (ch - '0'); | |
165 | } | |
166 | if (ch >= 'A' && ch <= 'F') | |
167 | { | |
168 | return (ch - 'A' + 10); | |
169 | } | |
170 | if (ch >= 'a' && ch <= 'f') | |
171 | { | |
172 | return (ch - 'a' + 10); | |
173 | } | |
174 | fprintf (stderr, "\nInvalid hex digit '%c'\n", ch); | |
175 | fflush (stderr); | |
176 | exit (1); | |
177 | } | |
178 | ||
179 | static int | |
fba45db2 | 180 | logchar (FILE *fp) |
c906108c SS |
181 | { |
182 | int ch; | |
183 | int ch2; | |
184 | ||
185 | ch = fgetc (fp); | |
186 | fputc (ch, stdout); | |
187 | fflush (stdout); | |
188 | switch (ch) | |
189 | { | |
190 | case '\n': | |
191 | ch = EOL; | |
192 | break; | |
193 | case '\\': | |
194 | ch = fgetc (fp); | |
195 | fputc (ch, stdout); | |
196 | fflush (stdout); | |
197 | switch (ch) | |
198 | { | |
c5aa993b JM |
199 | case '\\': |
200 | break; | |
201 | case 'b': | |
202 | ch = '\b'; | |
203 | break; | |
204 | case 'f': | |
205 | ch = '\f'; | |
206 | break; | |
207 | case 'n': | |
208 | ch = '\n'; | |
209 | break; | |
210 | case 'r': | |
211 | ch = '\r'; | |
212 | break; | |
213 | case 't': | |
214 | ch = '\t'; | |
215 | break; | |
216 | case 'v': | |
217 | ch = '\v'; | |
218 | break; | |
c906108c SS |
219 | case 'x': |
220 | ch2 = fgetc (fp); | |
221 | fputc (ch2, stdout); | |
222 | fflush (stdout); | |
223 | ch = tohex (ch2) << 4; | |
224 | ch2 = fgetc (fp); | |
225 | fputc (ch2, stdout); | |
226 | fflush (stdout); | |
227 | ch |= tohex (ch2); | |
228 | break; | |
229 | default: | |
230 | /* Treat any other char as just itself */ | |
231 | break; | |
232 | } | |
233 | default: | |
234 | break; | |
235 | } | |
236 | return (ch); | |
237 | } | |
238 | ||
239 | /* Accept input from gdb and match with chars from fp (after skipping one | |
240 | blank) up until a \n is read from fp (which is not matched) */ | |
241 | ||
82e0fd98 | 242 | static void |
fba45db2 | 243 | expect (FILE *fp) |
c906108c SS |
244 | { |
245 | int fromlog; | |
246 | unsigned char fromgdb; | |
247 | ||
248 | if ((fromlog = logchar (fp)) != ' ') | |
249 | { | |
250 | sync_error (fp, "Sync error during gdb read of leading blank", ' ', | |
251 | fromlog); | |
252 | } | |
253 | do | |
254 | { | |
255 | fromlog = logchar (fp); | |
256 | if (fromlog == EOL) | |
257 | { | |
258 | break; | |
259 | } | |
260 | read (remote_desc, &fromgdb, 1); | |
c5aa993b JM |
261 | } |
262 | while (fromlog == fromgdb); | |
c906108c SS |
263 | if (fromlog != EOL) |
264 | { | |
265 | sync_error (fp, "Sync error during read of gdb packet", fromlog, | |
266 | fromgdb); | |
267 | } | |
268 | } | |
269 | ||
270 | /* Play data back to gdb from fp (after skipping leading blank) up until a | |
271 | \n is read from fp (which is discarded and not sent to gdb). */ | |
272 | ||
82e0fd98 | 273 | static void |
fba45db2 | 274 | play (FILE *fp) |
c906108c SS |
275 | { |
276 | int fromlog; | |
277 | char ch; | |
278 | ||
279 | if ((fromlog = logchar (fp)) != ' ') | |
280 | { | |
281 | sync_error (fp, "Sync error skipping blank during write to gdb", ' ', | |
282 | fromlog); | |
283 | } | |
284 | while ((fromlog = logchar (fp)) != EOL) | |
285 | { | |
286 | ch = fromlog; | |
287 | write (remote_desc, &ch, 1); | |
288 | } | |
289 | } | |
290 | ||
291 | int | |
da85418c | 292 | main (int argc, char *argv[]) |
c906108c SS |
293 | { |
294 | FILE *fp; | |
295 | int ch; | |
296 | ||
297 | if (argc < 3) | |
298 | { | |
299 | fprintf (stderr, "Usage: gdbreplay <logfile> <host:port>\n"); | |
300 | fflush (stderr); | |
301 | exit (1); | |
302 | } | |
303 | fp = fopen (argv[1], "r"); | |
304 | if (fp == NULL) | |
305 | { | |
306 | perror_with_name (argv[1]); | |
c5aa993b | 307 | } |
c906108c SS |
308 | remote_open (argv[2]); |
309 | while ((ch = logchar (fp)) != EOF) | |
310 | { | |
311 | switch (ch) | |
312 | { | |
313 | case 'w': | |
314 | /* data sent from gdb to gdbreplay, accept and match it */ | |
315 | expect (fp); | |
316 | break; | |
317 | case 'r': | |
318 | /* data sent from gdbreplay to gdb, play it */ | |
319 | play (fp); | |
320 | break; | |
321 | case 'c': | |
322 | /* Command executed by gdb */ | |
323 | while ((ch = logchar (fp)) != EOL); | |
324 | break; | |
325 | } | |
326 | } | |
327 | remote_close (); | |
328 | exit (0); | |
329 | } |