Commit | Line | Data |
---|---|---|
c906108c | 1 | /* Replay a remote debug session logfile for GDB. |
b6ba6518 | 2 | Copyright 1996, 1998, 1999, 2000 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> |
c906108c SS |
33 | |
34 | /* Sort of a hack... */ | |
35 | #define EOL (EOF - 1) | |
36 | ||
37 | static int remote_desc; | |
38 | ||
39 | /* Print the system error message for errno, and also mention STRING | |
40 | as the file name for which the error was encountered. | |
41 | Then return to command level. */ | |
42 | ||
43 | void | |
fba45db2 | 44 | perror_with_name (char *string) |
c906108c | 45 | { |
5c44784c | 46 | #ifndef STDC_HEADERS |
c906108c SS |
47 | extern int sys_nerr; |
48 | extern char *sys_errlist[]; | |
49 | extern int errno; | |
5c44784c JM |
50 | #endif |
51 | const char *err; | |
c906108c SS |
52 | char *combined; |
53 | ||
54 | err = (errno < sys_nerr) ? sys_errlist[errno] : "unknown error"; | |
55 | combined = (char *) alloca (strlen (err) + strlen (string) + 3); | |
56 | strcpy (combined, string); | |
57 | strcat (combined, ": "); | |
58 | strcat (combined, err); | |
59 | fprintf (stderr, "\n%s.\n", combined); | |
60 | fflush (stderr); | |
61 | exit (1); | |
62 | } | |
63 | ||
64 | static void | |
fba45db2 | 65 | sync_error (FILE *fp, char *desc, int expect, int got) |
c906108c SS |
66 | { |
67 | fprintf (stderr, "\n%s\n", desc); | |
68 | fprintf (stderr, "At logfile offset %ld, expected '0x%x' got '0x%x'\n", | |
69 | ftell (fp), expect, got); | |
70 | fflush (stderr); | |
71 | exit (1); | |
72 | } | |
73 | ||
74 | void | |
fba45db2 | 75 | remote_close (void) |
c906108c SS |
76 | { |
77 | close (remote_desc); | |
78 | } | |
79 | ||
80 | /* Open a connection to a remote debugger. | |
81 | NAME is the filename used for communication. */ | |
82 | ||
83 | void | |
fba45db2 | 84 | remote_open (char *name) |
c906108c SS |
85 | { |
86 | extern char *strchr (); | |
87 | ||
88 | if (!strchr (name, ':')) | |
89 | { | |
90 | fprintf (stderr, "%s: Must specify tcp connection as host:addr\n", name); | |
91 | fflush (stderr); | |
92 | exit (1); | |
93 | } | |
94 | else | |
95 | { | |
96 | char *port_str; | |
97 | int port; | |
98 | struct sockaddr_in sockaddr; | |
99 | int tmp; | |
100 | struct protoent *protoent; | |
101 | int tmp_desc; | |
102 | ||
103 | port_str = strchr (name, ':'); | |
104 | ||
105 | port = atoi (port_str + 1); | |
106 | ||
107 | tmp_desc = socket (PF_INET, SOCK_STREAM, 0); | |
108 | if (tmp_desc < 0) | |
109 | perror_with_name ("Can't open socket"); | |
110 | ||
111 | /* Allow rapid reuse of this port. */ | |
112 | tmp = 1; | |
c5aa993b JM |
113 | setsockopt (tmp_desc, SOL_SOCKET, SO_REUSEADDR, (char *) &tmp, |
114 | sizeof (tmp)); | |
c906108c SS |
115 | |
116 | sockaddr.sin_family = PF_INET; | |
c5aa993b | 117 | sockaddr.sin_port = htons (port); |
c906108c SS |
118 | sockaddr.sin_addr.s_addr = INADDR_ANY; |
119 | ||
c5aa993b | 120 | if (bind (tmp_desc, (struct sockaddr *) &sockaddr, sizeof (sockaddr)) |
c906108c SS |
121 | || listen (tmp_desc, 1)) |
122 | perror_with_name ("Can't bind address"); | |
123 | ||
124 | tmp = sizeof (sockaddr); | |
c5aa993b | 125 | remote_desc = accept (tmp_desc, (struct sockaddr *) &sockaddr, &tmp); |
c906108c SS |
126 | if (remote_desc == -1) |
127 | perror_with_name ("Accept failed"); | |
128 | ||
129 | protoent = getprotobyname ("tcp"); | |
130 | if (!protoent) | |
131 | perror_with_name ("getprotobyname"); | |
132 | ||
133 | /* Enable TCP keep alive process. */ | |
134 | tmp = 1; | |
c5aa993b | 135 | setsockopt (tmp_desc, SOL_SOCKET, SO_KEEPALIVE, (char *) &tmp, sizeof (tmp)); |
c906108c SS |
136 | |
137 | /* Tell TCP not to delay small packets. This greatly speeds up | |
c5aa993b | 138 | interactive response. */ |
c906108c SS |
139 | tmp = 1; |
140 | setsockopt (remote_desc, protoent->p_proto, TCP_NODELAY, | |
c5aa993b | 141 | (char *) &tmp, sizeof (tmp)); |
c906108c SS |
142 | |
143 | close (tmp_desc); /* No longer need this */ | |
144 | ||
c5aa993b JM |
145 | signal (SIGPIPE, SIG_IGN); /* If we don't do this, then gdbreplay simply |
146 | exits when the remote side dies. */ | |
c906108c SS |
147 | } |
148 | ||
149 | fcntl (remote_desc, F_SETFL, FASYNC); | |
150 | ||
151 | fprintf (stderr, "Replay logfile using %s\n", name); | |
152 | fflush (stderr); | |
153 | } | |
154 | ||
c5aa993b | 155 | static int |
fba45db2 | 156 | tohex (int ch) |
c906108c SS |
157 | { |
158 | if (ch >= '0' && ch <= '9') | |
159 | { | |
160 | return (ch - '0'); | |
161 | } | |
162 | if (ch >= 'A' && ch <= 'F') | |
163 | { | |
164 | return (ch - 'A' + 10); | |
165 | } | |
166 | if (ch >= 'a' && ch <= 'f') | |
167 | { | |
168 | return (ch - 'a' + 10); | |
169 | } | |
170 | fprintf (stderr, "\nInvalid hex digit '%c'\n", ch); | |
171 | fflush (stderr); | |
172 | exit (1); | |
173 | } | |
174 | ||
175 | static int | |
fba45db2 | 176 | logchar (FILE *fp) |
c906108c SS |
177 | { |
178 | int ch; | |
179 | int ch2; | |
180 | ||
181 | ch = fgetc (fp); | |
182 | fputc (ch, stdout); | |
183 | fflush (stdout); | |
184 | switch (ch) | |
185 | { | |
186 | case '\n': | |
187 | ch = EOL; | |
188 | break; | |
189 | case '\\': | |
190 | ch = fgetc (fp); | |
191 | fputc (ch, stdout); | |
192 | fflush (stdout); | |
193 | switch (ch) | |
194 | { | |
c5aa993b JM |
195 | case '\\': |
196 | break; | |
197 | case 'b': | |
198 | ch = '\b'; | |
199 | break; | |
200 | case 'f': | |
201 | ch = '\f'; | |
202 | break; | |
203 | case 'n': | |
204 | ch = '\n'; | |
205 | break; | |
206 | case 'r': | |
207 | ch = '\r'; | |
208 | break; | |
209 | case 't': | |
210 | ch = '\t'; | |
211 | break; | |
212 | case 'v': | |
213 | ch = '\v'; | |
214 | break; | |
c906108c SS |
215 | case 'x': |
216 | ch2 = fgetc (fp); | |
217 | fputc (ch2, stdout); | |
218 | fflush (stdout); | |
219 | ch = tohex (ch2) << 4; | |
220 | ch2 = fgetc (fp); | |
221 | fputc (ch2, stdout); | |
222 | fflush (stdout); | |
223 | ch |= tohex (ch2); | |
224 | break; | |
225 | default: | |
226 | /* Treat any other char as just itself */ | |
227 | break; | |
228 | } | |
229 | default: | |
230 | break; | |
231 | } | |
232 | return (ch); | |
233 | } | |
234 | ||
235 | /* Accept input from gdb and match with chars from fp (after skipping one | |
236 | blank) up until a \n is read from fp (which is not matched) */ | |
237 | ||
238 | void | |
fba45db2 | 239 | expect (FILE *fp) |
c906108c SS |
240 | { |
241 | int fromlog; | |
242 | unsigned char fromgdb; | |
243 | ||
244 | if ((fromlog = logchar (fp)) != ' ') | |
245 | { | |
246 | sync_error (fp, "Sync error during gdb read of leading blank", ' ', | |
247 | fromlog); | |
248 | } | |
249 | do | |
250 | { | |
251 | fromlog = logchar (fp); | |
252 | if (fromlog == EOL) | |
253 | { | |
254 | break; | |
255 | } | |
256 | read (remote_desc, &fromgdb, 1); | |
c5aa993b JM |
257 | } |
258 | while (fromlog == fromgdb); | |
c906108c SS |
259 | if (fromlog != EOL) |
260 | { | |
261 | sync_error (fp, "Sync error during read of gdb packet", fromlog, | |
262 | fromgdb); | |
263 | } | |
264 | } | |
265 | ||
266 | /* Play data back to gdb from fp (after skipping leading blank) up until a | |
267 | \n is read from fp (which is discarded and not sent to gdb). */ | |
268 | ||
269 | void | |
fba45db2 | 270 | play (FILE *fp) |
c906108c SS |
271 | { |
272 | int fromlog; | |
273 | char ch; | |
274 | ||
275 | if ((fromlog = logchar (fp)) != ' ') | |
276 | { | |
277 | sync_error (fp, "Sync error skipping blank during write to gdb", ' ', | |
278 | fromlog); | |
279 | } | |
280 | while ((fromlog = logchar (fp)) != EOL) | |
281 | { | |
282 | ch = fromlog; | |
283 | write (remote_desc, &ch, 1); | |
284 | } | |
285 | } | |
286 | ||
287 | int | |
da85418c | 288 | main (int argc, char *argv[]) |
c906108c SS |
289 | { |
290 | FILE *fp; | |
291 | int ch; | |
292 | ||
293 | if (argc < 3) | |
294 | { | |
295 | fprintf (stderr, "Usage: gdbreplay <logfile> <host:port>\n"); | |
296 | fflush (stderr); | |
297 | exit (1); | |
298 | } | |
299 | fp = fopen (argv[1], "r"); | |
300 | if (fp == NULL) | |
301 | { | |
302 | perror_with_name (argv[1]); | |
c5aa993b | 303 | } |
c906108c SS |
304 | remote_open (argv[2]); |
305 | while ((ch = logchar (fp)) != EOF) | |
306 | { | |
307 | switch (ch) | |
308 | { | |
309 | case 'w': | |
310 | /* data sent from gdb to gdbreplay, accept and match it */ | |
311 | expect (fp); | |
312 | break; | |
313 | case 'r': | |
314 | /* data sent from gdbreplay to gdb, play it */ | |
315 | play (fp); | |
316 | break; | |
317 | case 'c': | |
318 | /* Command executed by gdb */ | |
319 | while ((ch = logchar (fp)) != EOL); | |
320 | break; | |
321 | } | |
322 | } | |
323 | remote_close (); | |
324 | exit (0); | |
325 | } |