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da0baf42 SG |
1 | /* Multi-process/thread control for GDB, the GNU debugger. |
2 | Copyright 1986, 1987, 1988, 1993 | |
3 | ||
4 | Contributed by Lynx Real-Time Systems, Inc. Los Gatos, CA. | |
5 | Free Software Foundation, Inc. | |
6 | ||
7 | This file is part of GDB. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 2 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program; if not, write to the Free Software | |
21 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
25286543 SG |
22 | |
23 | #include "defs.h" | |
24 | #include "symtab.h" | |
25 | #include "frame.h" | |
26 | #include "inferior.h" | |
27 | #include "environ.h" | |
28 | #include "value.h" | |
29 | #include "target.h" | |
30 | #include "thread.h" | |
46c28185 | 31 | #include "command.h" |
89ce0c8f | 32 | #include "gdbcmd.h" |
25286543 | 33 | |
89ce0c8f | 34 | #include <ctype.h> |
25286543 SG |
35 | #include <sys/types.h> |
36 | #include <signal.h> | |
37 | ||
38 | /*#include "lynxos-core.h"*/ | |
39 | ||
40 | struct thread_info | |
41 | { | |
42 | struct thread_info *next; | |
43 | int pid; /* Actual process id */ | |
44 | int num; /* Convenient handle */ | |
45 | }; | |
46 | ||
47 | static struct thread_info *thread_list = NULL; | |
48 | static int highest_thread_num; | |
49 | ||
25286543 SG |
50 | static void thread_command PARAMS ((char * tidstr, int from_tty)); |
51 | ||
52 | static void prune_threads PARAMS ((void)); | |
53 | ||
54 | static void thread_switch PARAMS ((int pid)); | |
55 | ||
de43d7d0 SG |
56 | static struct thread_info * find_thread_id PARAMS ((int num)); |
57 | ||
25286543 SG |
58 | void |
59 | init_thread_list () | |
60 | { | |
61 | struct thread_info *tp, *tpnext; | |
62 | ||
63 | if (!thread_list) | |
64 | return; | |
65 | ||
66 | for (tp = thread_list; tp; tp = tpnext) | |
67 | { | |
68 | tpnext = tp->next; | |
69 | free (tp); | |
70 | } | |
71 | ||
72 | thread_list = NULL; | |
73 | highest_thread_num = 0; | |
74 | } | |
75 | ||
76 | void | |
77 | add_thread (pid) | |
78 | int pid; | |
79 | { | |
80 | struct thread_info *tp; | |
81 | ||
3082244d | 82 | tp = (struct thread_info *) xmalloc (sizeof (struct thread_info)); |
25286543 SG |
83 | |
84 | tp->pid = pid; | |
85 | tp->num = ++highest_thread_num; | |
86 | tp->next = thread_list; | |
87 | thread_list = tp; | |
88 | } | |
89 | ||
90 | static struct thread_info * | |
91 | find_thread_id (num) | |
92 | int num; | |
93 | { | |
94 | struct thread_info *tp; | |
95 | ||
96 | for (tp = thread_list; tp; tp = tp->next) | |
97 | if (tp->num == num) | |
98 | return tp; | |
99 | ||
100 | return NULL; | |
101 | } | |
102 | ||
de43d7d0 SG |
103 | int |
104 | valid_thread_id (num) | |
105 | int num; | |
106 | { | |
107 | struct thread_info *tp; | |
108 | ||
109 | for (tp = thread_list; tp; tp = tp->next) | |
110 | if (tp->num == num) | |
111 | return 1; | |
112 | ||
113 | return 0; | |
114 | } | |
115 | ||
116 | int | |
117 | pid_to_thread_id (pid) | |
118 | int pid; | |
119 | { | |
120 | struct thread_info *tp; | |
121 | ||
122 | for (tp = thread_list; tp; tp = tp->next) | |
123 | if (tp->pid == pid) | |
124 | return tp->num; | |
125 | ||
126 | return 0; | |
127 | } | |
128 | ||
25286543 SG |
129 | int |
130 | in_thread_list (pid) | |
131 | int pid; | |
132 | { | |
133 | struct thread_info *tp; | |
134 | ||
135 | for (tp = thread_list; tp; tp = tp->next) | |
136 | if (tp->pid == pid) | |
137 | return 1; | |
138 | ||
139 | return 0; /* Never heard of 'im */ | |
140 | } | |
141 | ||
25286543 SG |
142 | static void |
143 | prune_threads () | |
144 | { | |
145 | struct thread_info *tp, *tpprev; | |
146 | ||
147 | tpprev = 0; | |
148 | ||
149 | for (tp = thread_list; tp; tp = tp->next) | |
150 | if (tp->pid == -1) | |
151 | { | |
152 | if (tpprev) | |
153 | tpprev->next = tp->next; | |
154 | else | |
155 | thread_list = NULL; | |
156 | ||
157 | free (tp); | |
158 | } | |
159 | else | |
160 | tpprev = tp; | |
161 | } | |
162 | ||
163 | /* Print information about currently known threads */ | |
164 | ||
165 | static void | |
166 | info_threads_command (arg, from_tty) | |
167 | char *arg; | |
168 | int from_tty; | |
169 | { | |
170 | struct thread_info *tp; | |
171 | int current_pid = inferior_pid; | |
172 | ||
4cc1b3f7 JK |
173 | /* Avoid coredumps which would happen if we tried to access a NULL |
174 | selected_frame. */ | |
175 | if (!target_has_stack) error ("No stack."); | |
176 | ||
25286543 SG |
177 | for (tp = thread_list; tp; tp = tp->next) |
178 | { | |
4cc1b3f7 JK |
179 | /* FIXME: need to figure out a way to do this for remote too, |
180 | or else the print_stack_frame below will fail with a bogus | |
181 | thread ID. */ | |
182 | if (!STREQ (current_target.to_shortname, "remote") | |
183 | && target_has_execution | |
25286543 SG |
184 | && kill (tp->pid, 0) == -1) |
185 | { | |
46c28185 | 186 | tp->pid = -1; /* Mark it as dead */ |
25286543 SG |
187 | continue; |
188 | } | |
189 | ||
190 | if (tp->pid == current_pid) | |
191 | printf_filtered ("* "); | |
192 | else | |
193 | printf_filtered (" "); | |
194 | ||
195 | printf_filtered ("%d %s ", tp->num, target_pid_to_str (tp->pid)); | |
196 | ||
197 | thread_switch (tp->pid); | |
198 | print_stack_frame (selected_frame, -1, 0); | |
199 | } | |
200 | ||
201 | thread_switch (current_pid); | |
202 | prune_threads (); | |
203 | } | |
204 | ||
205 | /* Switch from one thread to another. */ | |
206 | ||
3082244d | 207 | static void |
25286543 SG |
208 | thread_switch (pid) |
209 | int pid; | |
210 | { | |
211 | if (pid == inferior_pid) | |
212 | return; | |
213 | ||
214 | inferior_pid = pid; | |
25286543 SG |
215 | flush_cached_frames (); |
216 | registers_changed (); | |
217 | stop_pc = read_pc(); | |
25286543 SG |
218 | select_frame (get_current_frame (), 0); |
219 | } | |
220 | ||
5090e82c SG |
221 | static void |
222 | restore_current_thread (pid) | |
223 | int pid; | |
224 | { | |
225 | if (pid != inferior_pid) | |
226 | thread_switch (pid); | |
227 | } | |
228 | ||
229 | /* Apply a GDB command to a list of threads. List syntax is a whitespace | |
230 | seperated list of numbers, or ranges, or the keyword `all'. Ranges consist | |
231 | of two numbers seperated by a hyphen. Examples: | |
232 | ||
233 | thread apply 1 2 7 4 backtrace Apply backtrace cmd to threads 1,2,7,4 | |
234 | thread apply 2-7 9 p foo(1) Apply p foo(1) cmd to threads 2->7 & 9 | |
235 | thread apply all p x/i $pc Apply x/i $pc cmd to all threads | |
236 | */ | |
237 | ||
238 | static void | |
239 | thread_apply_all_command (cmd, from_tty) | |
240 | char *cmd; | |
241 | int from_tty; | |
242 | { | |
243 | struct thread_info *tp; | |
244 | struct cleanup *old_chain; | |
245 | ||
246 | if (cmd == NULL || *cmd == '\000') | |
247 | error ("Please specify a command following the thread ID list"); | |
248 | ||
249 | old_chain = make_cleanup (restore_current_thread, inferior_pid); | |
250 | ||
251 | for (tp = thread_list; tp; tp = tp->next) | |
252 | { | |
253 | thread_switch (tp->pid); | |
254 | printf_filtered ("\nThread %d (%s):\n", tp->num, | |
255 | target_pid_to_str (inferior_pid)); | |
256 | execute_command (cmd, from_tty); | |
257 | } | |
258 | } | |
259 | ||
260 | static void | |
261 | thread_apply_command (tidlist, from_tty) | |
262 | char *tidlist; | |
263 | int from_tty; | |
264 | { | |
265 | char *cmd; | |
266 | char *p; | |
267 | struct cleanup *old_chain; | |
268 | ||
269 | if (tidlist == NULL || *tidlist == '\000') | |
270 | error ("Please specify a thread ID list"); | |
271 | ||
272 | for (cmd = tidlist; *cmd != '\000' && !isalpha(*cmd); cmd++); | |
273 | ||
274 | if (*cmd == '\000') | |
275 | error ("Please specify a command following the thread ID list"); | |
276 | ||
277 | old_chain = make_cleanup (restore_current_thread, inferior_pid); | |
278 | ||
279 | while (tidlist < cmd) | |
280 | { | |
281 | struct thread_info *tp; | |
282 | int start, end; | |
283 | ||
284 | start = strtol (tidlist, &p, 10); | |
285 | if (p == tidlist) | |
286 | error ("Error parsing %s", tidlist); | |
287 | tidlist = p; | |
288 | ||
289 | while (*tidlist == ' ' || *tidlist == '\t') | |
290 | tidlist++; | |
291 | ||
292 | if (*tidlist == '-') /* Got a range of IDs? */ | |
293 | { | |
294 | tidlist++; /* Skip the - */ | |
295 | end = strtol (tidlist, &p, 10); | |
296 | if (p == tidlist) | |
297 | error ("Error parsing %s", tidlist); | |
298 | tidlist = p; | |
299 | ||
300 | while (*tidlist == ' ' || *tidlist == '\t') | |
301 | tidlist++; | |
302 | } | |
303 | else | |
304 | end = start; | |
305 | ||
306 | for (; start <= end; start++) | |
307 | { | |
308 | tp = find_thread_id (start); | |
309 | ||
310 | if (!tp) | |
311 | { | |
312 | warning ("Unknown thread %d.", start); | |
313 | continue; | |
314 | } | |
315 | ||
316 | thread_switch (tp->pid); | |
317 | printf_filtered ("\nThread %d (%s):\n", tp->num, | |
318 | target_pid_to_str (inferior_pid)); | |
319 | execute_command (cmd, from_tty); | |
320 | } | |
321 | } | |
322 | } | |
323 | ||
324 | /* Switch to the specified thread. Will dispatch off to thread_apply_command | |
325 | if prefix of arg is `apply'. */ | |
326 | ||
25286543 SG |
327 | static void |
328 | thread_command (tidstr, from_tty) | |
329 | char *tidstr; | |
330 | int from_tty; | |
331 | { | |
332 | int num; | |
333 | struct thread_info *tp; | |
334 | ||
335 | if (!tidstr) | |
336 | error ("Please specify a thread ID. Use the \"info threads\" command to\n\ | |
337 | see the IDs of currently known threads."); | |
338 | ||
25286543 SG |
339 | num = atoi (tidstr); |
340 | ||
341 | tp = find_thread_id (num); | |
342 | ||
343 | if (!tp) | |
344 | error ("Thread ID %d not known. Use the \"info threads\" command to\n\ | |
345 | see the IDs of currently known threads.", num); | |
346 | ||
347 | thread_switch (tp->pid); | |
348 | ||
349 | printf_filtered ("[Switching to %s]\n", target_pid_to_str (inferior_pid)); | |
350 | print_stack_frame (selected_frame, selected_frame_level, 1); | |
351 | } | |
352 | ||
353 | void | |
354 | _initialize_thread () | |
355 | { | |
5090e82c SG |
356 | static struct cmd_list_element *thread_cmd_list = NULL; |
357 | static struct cmd_list_element *thread_apply_list = NULL; | |
358 | extern struct cmd_list_element *cmdlist; | |
359 | ||
25286543 SG |
360 | add_info ("threads", info_threads_command, |
361 | "IDs of currently known threads."); | |
5090e82c SG |
362 | |
363 | add_prefix_cmd ("thread", class_run, thread_command, | |
364 | "Use this command to switch between threads.\n\ | |
365 | The new thread ID must be currently known.", &thread_cmd_list, "thread ", 1, | |
366 | &cmdlist); | |
367 | ||
368 | add_prefix_cmd ("apply", class_run, thread_apply_command, | |
369 | "Apply a command to a list of threads.", | |
370 | &thread_apply_list, "apply ", 1, &thread_cmd_list); | |
371 | ||
372 | add_cmd ("all", class_run, thread_apply_all_command, | |
373 | "Apply a command to all threads.", | |
374 | &thread_apply_list); | |
375 | ||
376 | add_com_alias ("t", "thread", class_run, 1); | |
25286543 | 377 | } |