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e2882c85 | 1 | /* Copyright (C) 1992-2018 Free Software Foundation, Inc. |
0ef643c8 JB |
2 | |
3 | This file is part of GDB. | |
4 | ||
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
7 | the Free Software Foundation; either version 3 of the License, or | |
8 | (at your option) any later version. | |
9 | ||
10 | This program is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
16 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
17 | ||
18 | #include "defs.h" | |
76727919 | 19 | #include "observable.h" |
0ef643c8 JB |
20 | #include "gdbcmd.h" |
21 | #include "target.h" | |
22 | #include "ada-lang.h" | |
23 | #include "gdbcore.h" | |
24 | #include "inferior.h" | |
25 | #include "gdbthread.h" | |
6da9ca05 JB |
26 | #include "progspace.h" |
27 | #include "objfiles.h" | |
0ef643c8 JB |
28 | |
29 | /* The name of the array in the GNAT runtime where the Ada Task Control | |
30 | Block of each task is stored. */ | |
31 | #define KNOWN_TASKS_NAME "system__tasking__debug__known_tasks" | |
32 | ||
b1ce2347 | 33 | /* The maximum number of tasks known to the Ada runtime. */ |
0ef643c8 JB |
34 | static const int MAX_NUMBER_OF_KNOWN_TASKS = 1000; |
35 | ||
6040a59d JB |
36 | /* The name of the variable in the GNAT runtime where the head of a task |
37 | chain is saved. This is an alternate mechanism to find the list of known | |
38 | tasks. */ | |
39 | #define KNOWN_TASKS_LIST "system__tasking__debug__first_task" | |
40 | ||
0ef643c8 JB |
41 | enum task_states |
42 | { | |
43 | Unactivated, | |
44 | Runnable, | |
45 | Terminated, | |
46 | Activator_Sleep, | |
47 | Acceptor_Sleep, | |
48 | Entry_Caller_Sleep, | |
49 | Async_Select_Sleep, | |
50 | Delay_Sleep, | |
51 | Master_Completion_Sleep, | |
52 | Master_Phase_2_Sleep, | |
53 | Interrupt_Server_Idle_Sleep, | |
54 | Interrupt_Server_Blocked_Interrupt_Sleep, | |
55 | Timer_Server_Sleep, | |
56 | AST_Server_Sleep, | |
57 | Asynchronous_Hold, | |
680f3fad JB |
58 | Interrupt_Server_Blocked_On_Event_Flag, |
59 | Activating, | |
60 | Acceptor_Delay_Sleep | |
0ef643c8 JB |
61 | }; |
62 | ||
63 | /* A short description corresponding to each possible task state. */ | |
d6b67a5e JK |
64 | static const char *task_states[] = { |
65 | N_("Unactivated"), | |
66 | N_("Runnable"), | |
67 | N_("Terminated"), | |
68 | N_("Child Activation Wait"), | |
680f3fad | 69 | N_("Accept or Select Term"), |
d6b67a5e JK |
70 | N_("Waiting on entry call"), |
71 | N_("Async Select Wait"), | |
72 | N_("Delay Sleep"), | |
73 | N_("Child Termination Wait"), | |
74 | N_("Wait Child in Term Alt"), | |
0ef643c8 JB |
75 | "", |
76 | "", | |
77 | "", | |
78 | "", | |
d6b67a5e | 79 | N_("Asynchronous Hold"), |
680f3fad JB |
80 | "", |
81 | N_("Activating"), | |
82 | N_("Selective Wait") | |
0ef643c8 JB |
83 | }; |
84 | ||
85 | /* A longer description corresponding to each possible task state. */ | |
d6b67a5e JK |
86 | static const char *long_task_states[] = { |
87 | N_("Unactivated"), | |
88 | N_("Runnable"), | |
89 | N_("Terminated"), | |
90 | N_("Waiting for child activation"), | |
680f3fad | 91 | N_("Blocked in accept or select with terminate"), |
d6b67a5e JK |
92 | N_("Waiting on entry call"), |
93 | N_("Asynchronous Selective Wait"), | |
94 | N_("Delay Sleep"), | |
95 | N_("Waiting for children termination"), | |
96 | N_("Waiting for children in terminate alternative"), | |
0ef643c8 JB |
97 | "", |
98 | "", | |
99 | "", | |
100 | "", | |
d6b67a5e | 101 | N_("Asynchronous Hold"), |
680f3fad JB |
102 | "", |
103 | N_("Activating"), | |
104 | N_("Blocked in selective wait statement") | |
0ef643c8 JB |
105 | }; |
106 | ||
107 | /* The index of certain important fields in the Ada Task Control Block | |
108 | record and sub-records. */ | |
109 | ||
dccd3cbd | 110 | struct atcb_fieldnos |
0ef643c8 JB |
111 | { |
112 | /* Fields in record Ada_Task_Control_Block. */ | |
113 | int common; | |
114 | int entry_calls; | |
115 | int atc_nesting_level; | |
116 | ||
117 | /* Fields in record Common_ATCB. */ | |
118 | int state; | |
119 | int parent; | |
120 | int priority; | |
121 | int image; | |
122 | int image_len; /* This field may be missing. */ | |
6040a59d | 123 | int activation_link; |
0ef643c8 JB |
124 | int call; |
125 | int ll; | |
65d40437 | 126 | int base_cpu; |
0ef643c8 JB |
127 | |
128 | /* Fields in Task_Primitives.Private_Data. */ | |
129 | int ll_thread; | |
130 | int ll_lwp; /* This field may be missing. */ | |
131 | ||
132 | /* Fields in Common_ATCB.Call.all. */ | |
133 | int call_self; | |
134 | }; | |
135 | ||
6da9ca05 | 136 | /* This module's per-program-space data. */ |
0ef643c8 | 137 | |
6da9ca05 JB |
138 | struct ada_tasks_pspace_data |
139 | { | |
140 | /* Nonzero if the data has been initialized. If set to zero, | |
141 | it means that the data has either not been initialized, or | |
142 | has potentially become stale. */ | |
143 | int initialized_p; | |
144 | ||
145 | /* The ATCB record type. */ | |
146 | struct type *atcb_type; | |
147 | ||
148 | /* The ATCB "Common" component type. */ | |
149 | struct type *atcb_common_type; | |
150 | ||
151 | /* The type of the "ll" field, from the atcb_common_type. */ | |
152 | struct type *atcb_ll_type; | |
153 | ||
154 | /* The type of the "call" field, from the atcb_common_type. */ | |
155 | struct type *atcb_call_type; | |
156 | ||
157 | /* The index of various fields in the ATCB record and sub-records. */ | |
158 | struct atcb_fieldnos atcb_fieldno; | |
159 | }; | |
160 | ||
161 | /* Key to our per-program-space data. */ | |
162 | static const struct program_space_data *ada_tasks_pspace_data_handle; | |
0ef643c8 | 163 | |
e225eb91 JB |
164 | /* The kind of data structure used by the runtime to store the list |
165 | of Ada tasks. */ | |
166 | ||
167 | enum ada_known_tasks_kind | |
168 | { | |
169 | /* Use this value when we haven't determined which kind of structure | |
170 | is being used, or when we need to recompute it. | |
171 | ||
172 | We set the value of this enumerate to zero on purpose: This allows | |
173 | us to use this enumerate in a structure where setting all fields | |
174 | to zero will result in this kind being set to unknown. */ | |
175 | ADA_TASKS_UNKNOWN = 0, | |
176 | ||
177 | /* This value means that we did not find any task list. Unless | |
178 | there is a bug somewhere, this means that the inferior does not | |
179 | use tasking. */ | |
180 | ADA_TASKS_NOT_FOUND, | |
181 | ||
182 | /* This value means that the task list is stored as an array. | |
183 | This is the usual method, as it causes very little overhead. | |
184 | But this method is not always used, as it does use a certain | |
185 | amount of memory, which might be scarse in certain environments. */ | |
186 | ADA_TASKS_ARRAY, | |
187 | ||
188 | /* This value means that the task list is stored as a linked list. | |
189 | This has more runtime overhead than the array approach, but | |
190 | also require less memory when the number of tasks is small. */ | |
191 | ADA_TASKS_LIST, | |
192 | }; | |
193 | ||
194 | /* This module's per-inferior data. */ | |
195 | ||
196 | struct ada_tasks_inferior_data | |
197 | { | |
198 | /* The type of data structure used by the runtime to store | |
199 | the list of Ada tasks. The value of this field influences | |
200 | the interpretation of the known_tasks_addr field below: | |
201 | - ADA_TASKS_UNKNOWN: The value of known_tasks_addr hasn't | |
202 | been determined yet; | |
203 | - ADA_TASKS_NOT_FOUND: The program probably does not use tasking | |
204 | and the known_tasks_addr is irrelevant; | |
205 | - ADA_TASKS_ARRAY: The known_tasks is an array; | |
206 | - ADA_TASKS_LIST: The known_tasks is a list. */ | |
c645cda4 | 207 | enum ada_known_tasks_kind known_tasks_kind = ADA_TASKS_UNKNOWN; |
e225eb91 JB |
208 | |
209 | /* The address of the known_tasks structure. This is where | |
210 | the runtime stores the information for all Ada tasks. | |
211 | The interpretation of this field depends on KNOWN_TASKS_KIND | |
212 | above. */ | |
c645cda4 | 213 | CORE_ADDR known_tasks_addr = 0; |
e225eb91 | 214 | |
ef59abfb | 215 | /* Type of elements of the known task. Usually a pointer. */ |
c645cda4 | 216 | struct type *known_tasks_element = nullptr; |
ef59abfb TG |
217 | |
218 | /* Number of elements in the known tasks array. */ | |
c645cda4 | 219 | unsigned int known_tasks_length = 0; |
ef59abfb | 220 | |
e225eb91 JB |
221 | /* When nonzero, this flag indicates that the task_list field |
222 | below is up to date. When set to zero, the list has either | |
223 | not been initialized, or has potentially become stale. */ | |
c645cda4 | 224 | int task_list_valid_p = 0; |
e225eb91 JB |
225 | |
226 | /* The list of Ada tasks. | |
227 | ||
228 | Note: To each task we associate a number that the user can use to | |
229 | reference it - this number is printed beside each task in the tasks | |
230 | info listing displayed by "info tasks". This number is equal to | |
231 | its index in the vector + 1. Reciprocally, to compute the index | |
232 | of a task in the vector, we need to substract 1 from its number. */ | |
c645cda4 | 233 | std::vector<ada_task_info> task_list; |
e225eb91 JB |
234 | }; |
235 | ||
236 | /* Key to our per-inferior data. */ | |
237 | static const struct inferior_data *ada_tasks_inferior_data_handle; | |
0ef643c8 | 238 | |
6da9ca05 JB |
239 | /* Return the ada-tasks module's data for the given program space (PSPACE). |
240 | If none is found, add a zero'ed one now. | |
241 | ||
242 | This function always returns a valid object. */ | |
243 | ||
244 | static struct ada_tasks_pspace_data * | |
245 | get_ada_tasks_pspace_data (struct program_space *pspace) | |
246 | { | |
247 | struct ada_tasks_pspace_data *data; | |
248 | ||
9a3c8263 SM |
249 | data = ((struct ada_tasks_pspace_data *) |
250 | program_space_data (pspace, ada_tasks_pspace_data_handle)); | |
6da9ca05 JB |
251 | if (data == NULL) |
252 | { | |
41bf6aca | 253 | data = XCNEW (struct ada_tasks_pspace_data); |
6da9ca05 JB |
254 | set_program_space_data (pspace, ada_tasks_pspace_data_handle, data); |
255 | } | |
256 | ||
257 | return data; | |
258 | } | |
259 | ||
e225eb91 JB |
260 | /* Return the ada-tasks module's data for the given inferior (INF). |
261 | If none is found, add a zero'ed one now. | |
262 | ||
263 | This function always returns a valid object. | |
264 | ||
265 | Note that we could use an observer of the inferior-created event | |
266 | to make sure that the ada-tasks per-inferior data always exists. | |
267 | But we prefered this approach, as it avoids this entirely as long | |
268 | as the user does not use any of the tasking features. This is | |
269 | quite possible, particularly in the case where the inferior does | |
270 | not use tasking. */ | |
271 | ||
272 | static struct ada_tasks_inferior_data * | |
273 | get_ada_tasks_inferior_data (struct inferior *inf) | |
274 | { | |
275 | struct ada_tasks_inferior_data *data; | |
276 | ||
9a3c8263 SM |
277 | data = ((struct ada_tasks_inferior_data *) |
278 | inferior_data (inf, ada_tasks_inferior_data_handle)); | |
e225eb91 JB |
279 | if (data == NULL) |
280 | { | |
c645cda4 | 281 | data = new ada_tasks_inferior_data; |
e225eb91 JB |
282 | set_inferior_data (inf, ada_tasks_inferior_data_handle, data); |
283 | } | |
284 | ||
285 | return data; | |
286 | } | |
287 | ||
00431a78 | 288 | /* Return the task number of the task whose thread is THREAD, or zero |
0ef643c8 JB |
289 | if the task could not be found. */ |
290 | ||
4a306c9a | 291 | int |
00431a78 | 292 | ada_get_task_number (thread_info *thread) |
0ef643c8 | 293 | { |
00431a78 | 294 | struct inferior *inf = thread->inf; |
e225eb91 JB |
295 | struct ada_tasks_inferior_data *data; |
296 | ||
297 | gdb_assert (inf != NULL); | |
298 | data = get_ada_tasks_inferior_data (inf); | |
0ef643c8 | 299 | |
c645cda4 SM |
300 | for (int i = 0; i < data->task_list.size (); i++) |
301 | if (data->task_list[i].ptid == thread->ptid) | |
0ef643c8 JB |
302 | return i + 1; |
303 | ||
304 | return 0; /* No matching task found. */ | |
305 | } | |
306 | ||
e225eb91 JB |
307 | /* Return the task number of the task running in inferior INF which |
308 | matches TASK_ID , or zero if the task could not be found. */ | |
0ef643c8 JB |
309 | |
310 | static int | |
e225eb91 | 311 | get_task_number_from_id (CORE_ADDR task_id, struct inferior *inf) |
0ef643c8 | 312 | { |
e225eb91 | 313 | struct ada_tasks_inferior_data *data = get_ada_tasks_inferior_data (inf); |
0ef643c8 | 314 | |
c645cda4 | 315 | for (int i = 0; i < data->task_list.size (); i++) |
0ef643c8 | 316 | { |
c645cda4 | 317 | if (data->task_list[i].task_id == task_id) |
0ef643c8 JB |
318 | return i + 1; |
319 | } | |
320 | ||
321 | /* Task not found. Return 0. */ | |
322 | return 0; | |
323 | } | |
324 | ||
325 | /* Return non-zero if TASK_NUM is a valid task number. */ | |
326 | ||
327 | int | |
328 | valid_task_id (int task_num) | |
329 | { | |
e225eb91 JB |
330 | struct ada_tasks_inferior_data *data; |
331 | ||
79779fa9 | 332 | ada_build_task_list (); |
e225eb91 | 333 | data = get_ada_tasks_inferior_data (current_inferior ()); |
c645cda4 | 334 | return task_num > 0 && task_num <= data->task_list.size (); |
0ef643c8 JB |
335 | } |
336 | ||
e22dccb5 JB |
337 | /* Return non-zero iff the task STATE corresponds to a non-terminated |
338 | task state. */ | |
339 | ||
340 | static int | |
341 | ada_task_is_alive (struct ada_task_info *task_info) | |
342 | { | |
343 | return (task_info->state != Terminated); | |
344 | } | |
345 | ||
9edcc12f JB |
346 | /* Search through the list of known tasks for the one whose ptid is |
347 | PTID, and return it. Return NULL if the task was not found. */ | |
348 | ||
349 | struct ada_task_info * | |
350 | ada_get_task_info_from_ptid (ptid_t ptid) | |
351 | { | |
9edcc12f JB |
352 | struct ada_tasks_inferior_data *data; |
353 | ||
354 | ada_build_task_list (); | |
355 | data = get_ada_tasks_inferior_data (current_inferior ()); | |
9edcc12f | 356 | |
c645cda4 | 357 | for (ada_task_info &task : data->task_list) |
9edcc12f | 358 | { |
c645cda4 SM |
359 | if (task.ptid == ptid) |
360 | return &task; | |
9edcc12f JB |
361 | } |
362 | ||
363 | return NULL; | |
364 | } | |
365 | ||
474011fb JB |
366 | /* Call the ITERATOR function once for each Ada task that hasn't been |
367 | terminated yet. */ | |
368 | ||
369 | void | |
370 | iterate_over_live_ada_tasks (ada_task_list_iterator_ftype *iterator) | |
371 | { | |
e225eb91 | 372 | struct ada_tasks_inferior_data *data; |
474011fb | 373 | |
79779fa9 | 374 | ada_build_task_list (); |
e225eb91 | 375 | data = get_ada_tasks_inferior_data (current_inferior ()); |
474011fb | 376 | |
c645cda4 | 377 | for (ada_task_info &task : data->task_list) |
474011fb | 378 | { |
c645cda4 | 379 | if (!ada_task_is_alive (&task)) |
474011fb | 380 | continue; |
c645cda4 | 381 | iterator (&task); |
474011fb JB |
382 | } |
383 | } | |
384 | ||
0ef643c8 JB |
385 | /* Extract the contents of the value as a string whose length is LENGTH, |
386 | and store the result in DEST. */ | |
387 | ||
388 | static void | |
389 | value_as_string (char *dest, struct value *val, int length) | |
390 | { | |
391 | memcpy (dest, value_contents (val), length); | |
392 | dest[length] = '\0'; | |
393 | } | |
394 | ||
395 | /* Extract the string image from the fat string corresponding to VAL, | |
396 | and store it in DEST. If the string length is greater than MAX_LEN, | |
397 | then truncate the result to the first MAX_LEN characters of the fat | |
398 | string. */ | |
399 | ||
400 | static void | |
401 | read_fat_string_value (char *dest, struct value *val, int max_len) | |
402 | { | |
403 | struct value *array_val; | |
404 | struct value *bounds_val; | |
405 | int len; | |
406 | ||
407 | /* The following variables are made static to avoid recomputing them | |
408 | each time this function is called. */ | |
409 | static int initialize_fieldnos = 1; | |
410 | static int array_fieldno; | |
411 | static int bounds_fieldno; | |
412 | static int upper_bound_fieldno; | |
413 | ||
414 | /* Get the index of the fields that we will need to read in order | |
415 | to extract the string from the fat string. */ | |
416 | if (initialize_fieldnos) | |
417 | { | |
418 | struct type *type = value_type (val); | |
419 | struct type *bounds_type; | |
420 | ||
421 | array_fieldno = ada_get_field_index (type, "P_ARRAY", 0); | |
422 | bounds_fieldno = ada_get_field_index (type, "P_BOUNDS", 0); | |
423 | ||
424 | bounds_type = TYPE_FIELD_TYPE (type, bounds_fieldno); | |
425 | if (TYPE_CODE (bounds_type) == TYPE_CODE_PTR) | |
426 | bounds_type = TYPE_TARGET_TYPE (bounds_type); | |
427 | if (TYPE_CODE (bounds_type) != TYPE_CODE_STRUCT) | |
428 | error (_("Unknown task name format. Aborting")); | |
429 | upper_bound_fieldno = ada_get_field_index (bounds_type, "UB0", 0); | |
430 | ||
431 | initialize_fieldnos = 0; | |
432 | } | |
433 | ||
434 | /* Get the size of the task image by checking the value of the bounds. | |
435 | The lower bound is always 1, so we only need to read the upper bound. */ | |
436 | bounds_val = value_ind (value_field (val, bounds_fieldno)); | |
437 | len = value_as_long (value_field (bounds_val, upper_bound_fieldno)); | |
438 | ||
439 | /* Make sure that we do not read more than max_len characters... */ | |
440 | if (len > max_len) | |
441 | len = max_len; | |
442 | ||
443 | /* Extract LEN characters from the fat string. */ | |
444 | array_val = value_ind (value_field (val, array_fieldno)); | |
c714b426 | 445 | read_memory (value_address (array_val), (gdb_byte *) dest, len); |
0ef643c8 JB |
446 | |
447 | /* Add the NUL character to close the string. */ | |
448 | dest[len] = '\0'; | |
449 | } | |
450 | ||
cf3fbed4 JB |
451 | /* Get, from the debugging information, the type description of all types |
452 | related to the Ada Task Control Block that are needed in order to | |
453 | read the list of known tasks in the Ada runtime. If all of the info | |
454 | needed to do so is found, then save that info in the module's per- | |
455 | program-space data, and return NULL. Otherwise, if any information | |
456 | cannot be found, leave the per-program-space data untouched, and | |
457 | return an error message explaining what was missing (that error | |
458 | message does NOT need to be deallocated). */ | |
459 | ||
460 | const char * | |
461 | ada_get_tcb_types_info (void) | |
0ef643c8 JB |
462 | { |
463 | struct type *type; | |
464 | struct type *common_type; | |
465 | struct type *ll_type; | |
466 | struct type *call_type; | |
dccd3cbd | 467 | struct atcb_fieldnos fieldnos; |
6da9ca05 | 468 | struct ada_tasks_pspace_data *pspace_data; |
0ef643c8 JB |
469 | |
470 | const char *atcb_name = "system__tasking__ada_task_control_block___XVE"; | |
471 | const char *atcb_name_fixed = "system__tasking__ada_task_control_block"; | |
472 | const char *common_atcb_name = "system__tasking__common_atcb"; | |
473 | const char *private_data_name = "system__task_primitives__private_data"; | |
474 | const char *entry_call_record_name = "system__tasking__entry_call_record"; | |
475 | ||
0963b4bd | 476 | /* ATCB symbols may be found in several compilation units. As we |
09e7f15b JB |
477 | are only interested in one instance, use standard (literal, |
478 | C-like) lookups to get the first match. */ | |
479 | ||
0ef643c8 | 480 | struct symbol *atcb_sym = |
318d3177 | 481 | lookup_symbol_in_language (atcb_name, NULL, STRUCT_DOMAIN, |
d12307c1 | 482 | language_c, NULL).symbol; |
0ef643c8 | 483 | const struct symbol *common_atcb_sym = |
318d3177 | 484 | lookup_symbol_in_language (common_atcb_name, NULL, STRUCT_DOMAIN, |
d12307c1 | 485 | language_c, NULL).symbol; |
0ef643c8 | 486 | const struct symbol *private_data_sym = |
318d3177 | 487 | lookup_symbol_in_language (private_data_name, NULL, STRUCT_DOMAIN, |
d12307c1 | 488 | language_c, NULL).symbol; |
0ef643c8 | 489 | const struct symbol *entry_call_record_sym = |
318d3177 | 490 | lookup_symbol_in_language (entry_call_record_name, NULL, STRUCT_DOMAIN, |
d12307c1 | 491 | language_c, NULL).symbol; |
0ef643c8 JB |
492 | |
493 | if (atcb_sym == NULL || atcb_sym->type == NULL) | |
494 | { | |
495 | /* In Ravenscar run-time libs, the ATCB does not have a dynamic | |
496 | size, so the symbol name differs. */ | |
318d3177 | 497 | atcb_sym = lookup_symbol_in_language (atcb_name_fixed, NULL, |
d12307c1 PMR |
498 | STRUCT_DOMAIN, language_c, |
499 | NULL).symbol; | |
0ef643c8 JB |
500 | |
501 | if (atcb_sym == NULL || atcb_sym->type == NULL) | |
cf3fbed4 | 502 | return _("Cannot find Ada_Task_Control_Block type"); |
0ef643c8 JB |
503 | |
504 | type = atcb_sym->type; | |
505 | } | |
506 | else | |
507 | { | |
508 | /* Get a static representation of the type record | |
509 | Ada_Task_Control_Block. */ | |
510 | type = atcb_sym->type; | |
511 | type = ada_template_to_fixed_record_type_1 (type, NULL, 0, NULL, 0); | |
512 | } | |
513 | ||
514 | if (common_atcb_sym == NULL || common_atcb_sym->type == NULL) | |
cf3fbed4 | 515 | return _("Cannot find Common_ATCB type"); |
0ef643c8 | 516 | if (private_data_sym == NULL || private_data_sym->type == NULL) |
cf3fbed4 | 517 | return _("Cannot find Private_Data type"); |
0ef643c8 | 518 | if (entry_call_record_sym == NULL || entry_call_record_sym->type == NULL) |
cf3fbed4 | 519 | return _("Cannot find Entry_Call_Record type"); |
0ef643c8 JB |
520 | |
521 | /* Get the type for Ada_Task_Control_Block.Common. */ | |
522 | common_type = common_atcb_sym->type; | |
523 | ||
524 | /* Get the type for Ada_Task_Control_Bloc.Common.Call.LL. */ | |
525 | ll_type = private_data_sym->type; | |
526 | ||
527 | /* Get the type for Common_ATCB.Call.all. */ | |
528 | call_type = entry_call_record_sym->type; | |
529 | ||
530 | /* Get the field indices. */ | |
531 | fieldnos.common = ada_get_field_index (type, "common", 0); | |
532 | fieldnos.entry_calls = ada_get_field_index (type, "entry_calls", 1); | |
533 | fieldnos.atc_nesting_level = | |
534 | ada_get_field_index (type, "atc_nesting_level", 1); | |
535 | fieldnos.state = ada_get_field_index (common_type, "state", 0); | |
536 | fieldnos.parent = ada_get_field_index (common_type, "parent", 1); | |
537 | fieldnos.priority = ada_get_field_index (common_type, "base_priority", 0); | |
538 | fieldnos.image = ada_get_field_index (common_type, "task_image", 1); | |
539 | fieldnos.image_len = ada_get_field_index (common_type, "task_image_len", 1); | |
6040a59d JB |
540 | fieldnos.activation_link = ada_get_field_index (common_type, |
541 | "activation_link", 1); | |
0ef643c8 JB |
542 | fieldnos.call = ada_get_field_index (common_type, "call", 1); |
543 | fieldnos.ll = ada_get_field_index (common_type, "ll", 0); | |
65d40437 | 544 | fieldnos.base_cpu = ada_get_field_index (common_type, "base_cpu", 0); |
0ef643c8 JB |
545 | fieldnos.ll_thread = ada_get_field_index (ll_type, "thread", 0); |
546 | fieldnos.ll_lwp = ada_get_field_index (ll_type, "lwp", 1); | |
547 | fieldnos.call_self = ada_get_field_index (call_type, "self", 0); | |
548 | ||
549 | /* On certain platforms such as x86-windows, the "lwp" field has been | |
550 | named "thread_id". This field will likely be renamed in the future, | |
551 | but we need to support both possibilities to avoid an unnecessary | |
552 | dependency on a recent compiler. We therefore try locating the | |
553 | "thread_id" field in place of the "lwp" field if we did not find | |
554 | the latter. */ | |
555 | if (fieldnos.ll_lwp < 0) | |
556 | fieldnos.ll_lwp = ada_get_field_index (ll_type, "thread_id", 1); | |
557 | ||
558 | /* Set all the out parameters all at once, now that we are certain | |
559 | that there are no potential error() anymore. */ | |
6da9ca05 JB |
560 | pspace_data = get_ada_tasks_pspace_data (current_program_space); |
561 | pspace_data->initialized_p = 1; | |
562 | pspace_data->atcb_type = type; | |
563 | pspace_data->atcb_common_type = common_type; | |
564 | pspace_data->atcb_ll_type = ll_type; | |
565 | pspace_data->atcb_call_type = call_type; | |
566 | pspace_data->atcb_fieldno = fieldnos; | |
cf3fbed4 | 567 | return NULL; |
0ef643c8 JB |
568 | } |
569 | ||
570 | /* Build the PTID of the task from its COMMON_VALUE, which is the "Common" | |
571 | component of its ATCB record. This PTID needs to match the PTID used | |
572 | by the thread layer. */ | |
573 | ||
574 | static ptid_t | |
575 | ptid_from_atcb_common (struct value *common_value) | |
576 | { | |
577 | long thread = 0; | |
578 | CORE_ADDR lwp = 0; | |
579 | struct value *ll_value; | |
580 | ptid_t ptid; | |
6da9ca05 JB |
581 | const struct ada_tasks_pspace_data *pspace_data |
582 | = get_ada_tasks_pspace_data (current_program_space); | |
0ef643c8 | 583 | |
6da9ca05 | 584 | ll_value = value_field (common_value, pspace_data->atcb_fieldno.ll); |
0ef643c8 | 585 | |
6da9ca05 JB |
586 | if (pspace_data->atcb_fieldno.ll_lwp >= 0) |
587 | lwp = value_as_address (value_field (ll_value, | |
588 | pspace_data->atcb_fieldno.ll_lwp)); | |
589 | thread = value_as_long (value_field (ll_value, | |
590 | pspace_data->atcb_fieldno.ll_thread)); | |
0ef643c8 JB |
591 | |
592 | ptid = target_get_ada_task_ptid (lwp, thread); | |
593 | ||
594 | return ptid; | |
595 | } | |
596 | ||
597 | /* Read the ATCB data of a given task given its TASK_ID (which is in practice | |
598 | the address of its assocated ATCB record), and store the result inside | |
599 | TASK_INFO. */ | |
600 | ||
601 | static void | |
602 | read_atcb (CORE_ADDR task_id, struct ada_task_info *task_info) | |
603 | { | |
604 | struct value *tcb_value; | |
605 | struct value *common_value; | |
606 | struct value *atc_nesting_level_value; | |
607 | struct value *entry_calls_value; | |
608 | struct value *entry_calls_value_element; | |
609 | int called_task_fieldno = -1; | |
b1c8db38 | 610 | static const char ravenscar_task_name[] = "Ravenscar task"; |
6da9ca05 JB |
611 | const struct ada_tasks_pspace_data *pspace_data |
612 | = get_ada_tasks_pspace_data (current_program_space); | |
0ef643c8 | 613 | |
6da9ca05 | 614 | if (!pspace_data->initialized_p) |
cf3fbed4 JB |
615 | { |
616 | const char *err_msg = ada_get_tcb_types_info (); | |
617 | ||
618 | if (err_msg != NULL) | |
619 | error (_("%s. Aborting"), err_msg); | |
620 | } | |
0ef643c8 | 621 | |
6da9ca05 JB |
622 | tcb_value = value_from_contents_and_address (pspace_data->atcb_type, |
623 | NULL, task_id); | |
624 | common_value = value_field (tcb_value, pspace_data->atcb_fieldno.common); | |
0ef643c8 JB |
625 | |
626 | /* Fill in the task_id. */ | |
627 | ||
628 | task_info->task_id = task_id; | |
629 | ||
630 | /* Compute the name of the task. | |
631 | ||
632 | Depending on the GNAT version used, the task image is either a fat | |
633 | string, or a thin array of characters. Older versions of GNAT used | |
634 | to use fat strings, and therefore did not need an extra field in | |
0963b4bd | 635 | the ATCB to store the string length. For efficiency reasons, newer |
0ef643c8 JB |
636 | versions of GNAT replaced the fat string by a static buffer, but this |
637 | also required the addition of a new field named "Image_Len" containing | |
0963b4bd | 638 | the length of the task name. The method used to extract the task name |
0ef643c8 JB |
639 | is selected depending on the existence of this field. |
640 | ||
641 | In some run-time libs (e.g. Ravenscar), the name is not in the ATCB; | |
0963b4bd | 642 | we may want to get it from the first user frame of the stack. For now, |
0ef643c8 JB |
643 | we just give a dummy name. */ |
644 | ||
6da9ca05 | 645 | if (pspace_data->atcb_fieldno.image_len == -1) |
0ef643c8 | 646 | { |
6da9ca05 | 647 | if (pspace_data->atcb_fieldno.image >= 0) |
0ef643c8 | 648 | read_fat_string_value (task_info->name, |
6da9ca05 JB |
649 | value_field (common_value, |
650 | pspace_data->atcb_fieldno.image), | |
0ef643c8 JB |
651 | sizeof (task_info->name) - 1); |
652 | else | |
b1c8db38 | 653 | { |
7cbd4a93 | 654 | struct bound_minimal_symbol msym; |
b1c8db38 TG |
655 | |
656 | msym = lookup_minimal_symbol_by_pc (task_id); | |
7cbd4a93 | 657 | if (msym.minsym) |
b1c8db38 | 658 | { |
efd66ac6 | 659 | const char *full_name = MSYMBOL_LINKAGE_NAME (msym.minsym); |
b1c8db38 TG |
660 | const char *task_name = full_name; |
661 | const char *p; | |
662 | ||
663 | /* Strip the prefix. */ | |
664 | for (p = full_name; *p; p++) | |
665 | if (p[0] == '_' && p[1] == '_') | |
666 | task_name = p + 2; | |
667 | ||
668 | /* Copy the task name. */ | |
669 | strncpy (task_info->name, task_name, sizeof (task_info->name)); | |
670 | task_info->name[sizeof (task_info->name) - 1] = 0; | |
671 | } | |
672 | else | |
673 | { | |
674 | /* No symbol found. Use a default name. */ | |
675 | strcpy (task_info->name, ravenscar_task_name); | |
676 | } | |
677 | } | |
0ef643c8 JB |
678 | } |
679 | else | |
680 | { | |
6da9ca05 JB |
681 | int len = value_as_long |
682 | (value_field (common_value, | |
683 | pspace_data->atcb_fieldno.image_len)); | |
0ef643c8 JB |
684 | |
685 | value_as_string (task_info->name, | |
6da9ca05 JB |
686 | value_field (common_value, |
687 | pspace_data->atcb_fieldno.image), | |
688 | len); | |
0ef643c8 JB |
689 | } |
690 | ||
691 | /* Compute the task state and priority. */ | |
692 | ||
cb741e45 | 693 | task_info->state = |
6da9ca05 JB |
694 | value_as_long (value_field (common_value, |
695 | pspace_data->atcb_fieldno.state)); | |
0ef643c8 | 696 | task_info->priority = |
6da9ca05 JB |
697 | value_as_long (value_field (common_value, |
698 | pspace_data->atcb_fieldno.priority)); | |
0ef643c8 JB |
699 | |
700 | /* If the ATCB contains some information about the parent task, | |
701 | then compute it as well. Otherwise, zero. */ | |
702 | ||
6da9ca05 | 703 | if (pspace_data->atcb_fieldno.parent >= 0) |
0ef643c8 | 704 | task_info->parent = |
6da9ca05 JB |
705 | value_as_address (value_field (common_value, |
706 | pspace_data->atcb_fieldno.parent)); | |
0ef643c8 JB |
707 | else |
708 | task_info->parent = 0; | |
709 | ||
710 | ||
711 | /* If the ATCB contains some information about entry calls, then | |
712 | compute the "called_task" as well. Otherwise, zero. */ | |
713 | ||
6da9ca05 JB |
714 | if (pspace_data->atcb_fieldno.atc_nesting_level > 0 |
715 | && pspace_data->atcb_fieldno.entry_calls > 0) | |
0ef643c8 JB |
716 | { |
717 | /* Let My_ATCB be the Ada task control block of a task calling the | |
718 | entry of another task; then the Task_Id of the called task is | |
719 | in My_ATCB.Entry_Calls (My_ATCB.ATC_Nesting_Level).Called_Task. */ | |
6da9ca05 JB |
720 | atc_nesting_level_value = |
721 | value_field (tcb_value, pspace_data->atcb_fieldno.atc_nesting_level); | |
0ef643c8 | 722 | entry_calls_value = |
6da9ca05 JB |
723 | ada_coerce_to_simple_array_ptr |
724 | (value_field (tcb_value, pspace_data->atcb_fieldno.entry_calls)); | |
0ef643c8 | 725 | entry_calls_value_element = |
2497b498 UW |
726 | value_subscript (entry_calls_value, |
727 | value_as_long (atc_nesting_level_value)); | |
0ef643c8 JB |
728 | called_task_fieldno = |
729 | ada_get_field_index (value_type (entry_calls_value_element), | |
730 | "called_task", 0); | |
731 | task_info->called_task = | |
732 | value_as_address (value_field (entry_calls_value_element, | |
733 | called_task_fieldno)); | |
734 | } | |
735 | else | |
736 | { | |
737 | task_info->called_task = 0; | |
738 | } | |
739 | ||
740 | /* If the ATCB cotnains some information about RV callers, | |
741 | then compute the "caller_task". Otherwise, zero. */ | |
742 | ||
743 | task_info->caller_task = 0; | |
6da9ca05 | 744 | if (pspace_data->atcb_fieldno.call >= 0) |
0ef643c8 JB |
745 | { |
746 | /* Get the ID of the caller task from Common_ATCB.Call.all.Self. | |
747 | If Common_ATCB.Call is null, then there is no caller. */ | |
748 | const CORE_ADDR call = | |
6da9ca05 JB |
749 | value_as_address (value_field (common_value, |
750 | pspace_data->atcb_fieldno.call)); | |
0ef643c8 JB |
751 | struct value *call_val; |
752 | ||
753 | if (call != 0) | |
754 | { | |
755 | call_val = | |
6da9ca05 JB |
756 | value_from_contents_and_address (pspace_data->atcb_call_type, |
757 | NULL, call); | |
0ef643c8 | 758 | task_info->caller_task = |
6da9ca05 JB |
759 | value_as_address |
760 | (value_field (call_val, pspace_data->atcb_fieldno.call_self)); | |
0ef643c8 JB |
761 | } |
762 | } | |
763 | ||
65d40437 JB |
764 | task_info->base_cpu |
765 | = value_as_long (value_field (common_value, | |
766 | pspace_data->atcb_fieldno.base_cpu)); | |
767 | ||
e05fa6f9 JB |
768 | /* And finally, compute the task ptid. Note that there is not point |
769 | in computing it if the task is no longer alive, in which case | |
770 | it is good enough to set its ptid to the null_ptid. */ | |
771 | if (ada_task_is_alive (task_info)) | |
0ef643c8 JB |
772 | task_info->ptid = ptid_from_atcb_common (common_value); |
773 | else | |
774 | task_info->ptid = null_ptid; | |
775 | } | |
776 | ||
777 | /* Read the ATCB info of the given task (identified by TASK_ID), and | |
e225eb91 | 778 | add the result to the given inferior's TASK_LIST. */ |
0ef643c8 JB |
779 | |
780 | static void | |
e225eb91 | 781 | add_ada_task (CORE_ADDR task_id, struct inferior *inf) |
0ef643c8 JB |
782 | { |
783 | struct ada_task_info task_info; | |
e225eb91 | 784 | struct ada_tasks_inferior_data *data = get_ada_tasks_inferior_data (inf); |
0ef643c8 JB |
785 | |
786 | read_atcb (task_id, &task_info); | |
c645cda4 | 787 | data->task_list.push_back (task_info); |
0ef643c8 JB |
788 | } |
789 | ||
790 | /* Read the Known_Tasks array from the inferior memory, and store | |
e225eb91 | 791 | it in the current inferior's TASK_LIST. Return non-zero upon success. */ |
0ef643c8 JB |
792 | |
793 | static int | |
ef59abfb | 794 | read_known_tasks_array (struct ada_tasks_inferior_data *data) |
0ef643c8 | 795 | { |
ef59abfb TG |
796 | const int target_ptr_byte = TYPE_LENGTH (data->known_tasks_element); |
797 | const int known_tasks_size = target_ptr_byte * data->known_tasks_length; | |
224c3ddb | 798 | gdb_byte *known_tasks = (gdb_byte *) alloca (known_tasks_size); |
0ef643c8 JB |
799 | int i; |
800 | ||
6040a59d JB |
801 | /* Build a new list by reading the ATCBs from the Known_Tasks array |
802 | in the Ada runtime. */ | |
ef59abfb TG |
803 | read_memory (data->known_tasks_addr, known_tasks, known_tasks_size); |
804 | for (i = 0; i < data->known_tasks_length; i++) | |
0ef643c8 | 805 | { |
0ef643c8 JB |
806 | CORE_ADDR task_id = |
807 | extract_typed_address (known_tasks + i * target_ptr_byte, | |
ef59abfb | 808 | data->known_tasks_element); |
0ef643c8 JB |
809 | |
810 | if (task_id != 0) | |
e225eb91 | 811 | add_ada_task (task_id, current_inferior ()); |
0ef643c8 JB |
812 | } |
813 | ||
6040a59d JB |
814 | return 1; |
815 | } | |
816 | ||
817 | /* Read the known tasks from the inferior memory, and store it in | |
e225eb91 | 818 | the current inferior's TASK_LIST. Return non-zero upon success. */ |
6040a59d JB |
819 | |
820 | static int | |
ef59abfb | 821 | read_known_tasks_list (struct ada_tasks_inferior_data *data) |
6040a59d | 822 | { |
ef59abfb | 823 | const int target_ptr_byte = TYPE_LENGTH (data->known_tasks_element); |
224c3ddb | 824 | gdb_byte *known_tasks = (gdb_byte *) alloca (target_ptr_byte); |
6040a59d | 825 | CORE_ADDR task_id; |
6da9ca05 JB |
826 | const struct ada_tasks_pspace_data *pspace_data |
827 | = get_ada_tasks_pspace_data (current_program_space); | |
6040a59d JB |
828 | |
829 | /* Sanity check. */ | |
6da9ca05 | 830 | if (pspace_data->atcb_fieldno.activation_link < 0) |
6040a59d JB |
831 | return 0; |
832 | ||
833 | /* Build a new list by reading the ATCBs. Read head of the list. */ | |
ef59abfb TG |
834 | read_memory (data->known_tasks_addr, known_tasks, target_ptr_byte); |
835 | task_id = extract_typed_address (known_tasks, data->known_tasks_element); | |
6040a59d JB |
836 | while (task_id != 0) |
837 | { | |
838 | struct value *tcb_value; | |
839 | struct value *common_value; | |
840 | ||
e225eb91 | 841 | add_ada_task (task_id, current_inferior ()); |
6040a59d JB |
842 | |
843 | /* Read the chain. */ | |
6da9ca05 JB |
844 | tcb_value = value_from_contents_and_address (pspace_data->atcb_type, |
845 | NULL, task_id); | |
846 | common_value = value_field (tcb_value, pspace_data->atcb_fieldno.common); | |
847 | task_id = value_as_address | |
848 | (value_field (common_value, | |
849 | pspace_data->atcb_fieldno.activation_link)); | |
6040a59d JB |
850 | } |
851 | ||
852 | return 1; | |
853 | } | |
854 | ||
ef59abfb TG |
855 | /* Set all fields of the current inferior ada-tasks data pointed by DATA. |
856 | Do nothing if those fields are already set and still up to date. */ | |
e225eb91 JB |
857 | |
858 | static void | |
ef59abfb | 859 | ada_tasks_inferior_data_sniffer (struct ada_tasks_inferior_data *data) |
e225eb91 | 860 | { |
3b7344d5 | 861 | struct bound_minimal_symbol msym; |
ef59abfb | 862 | struct symbol *sym; |
e225eb91 | 863 | |
ef59abfb | 864 | /* Return now if already set. */ |
e225eb91 JB |
865 | if (data->known_tasks_kind != ADA_TASKS_UNKNOWN) |
866 | return; | |
867 | ||
ef59abfb TG |
868 | /* Try array. */ |
869 | ||
870 | msym = lookup_minimal_symbol (KNOWN_TASKS_NAME, NULL, NULL); | |
3b7344d5 | 871 | if (msym.minsym != NULL) |
e225eb91 JB |
872 | { |
873 | data->known_tasks_kind = ADA_TASKS_ARRAY; | |
77e371c0 | 874 | data->known_tasks_addr = BMSYMBOL_VALUE_ADDRESS (msym); |
ef59abfb TG |
875 | |
876 | /* Try to get pointer type and array length from the symtab. */ | |
877 | sym = lookup_symbol_in_language (KNOWN_TASKS_NAME, NULL, VAR_DOMAIN, | |
d12307c1 | 878 | language_c, NULL).symbol; |
ef59abfb TG |
879 | if (sym != NULL) |
880 | { | |
881 | /* Validate. */ | |
882 | struct type *type = check_typedef (SYMBOL_TYPE (sym)); | |
d4cd3da9 JB |
883 | struct type *eltype = NULL; |
884 | struct type *idxtype = NULL; | |
885 | ||
886 | if (TYPE_CODE (type) == TYPE_CODE_ARRAY) | |
887 | eltype = check_typedef (TYPE_TARGET_TYPE (type)); | |
888 | if (eltype != NULL | |
889 | && TYPE_CODE (eltype) == TYPE_CODE_PTR) | |
890 | idxtype = check_typedef (TYPE_INDEX_TYPE (type)); | |
891 | if (idxtype != NULL | |
ef59abfb TG |
892 | && !TYPE_LOW_BOUND_UNDEFINED (idxtype) |
893 | && !TYPE_HIGH_BOUND_UNDEFINED (idxtype)) | |
894 | { | |
895 | data->known_tasks_element = eltype; | |
896 | data->known_tasks_length = | |
897 | TYPE_HIGH_BOUND (idxtype) - TYPE_LOW_BOUND (idxtype) + 1; | |
898 | return; | |
899 | } | |
900 | } | |
901 | ||
902 | /* Fallback to default values. The runtime may have been stripped (as | |
903 | in some distributions), but it is likely that the executable still | |
904 | contains debug information on the task type (due to implicit with of | |
905 | Ada.Tasking). */ | |
906 | data->known_tasks_element = | |
f5656ead | 907 | builtin_type (target_gdbarch ())->builtin_data_ptr; |
ef59abfb | 908 | data->known_tasks_length = MAX_NUMBER_OF_KNOWN_TASKS; |
e225eb91 JB |
909 | return; |
910 | } | |
911 | ||
ef59abfb TG |
912 | |
913 | /* Try list. */ | |
914 | ||
915 | msym = lookup_minimal_symbol (KNOWN_TASKS_LIST, NULL, NULL); | |
3b7344d5 | 916 | if (msym.minsym != NULL) |
e225eb91 JB |
917 | { |
918 | data->known_tasks_kind = ADA_TASKS_LIST; | |
77e371c0 | 919 | data->known_tasks_addr = BMSYMBOL_VALUE_ADDRESS (msym); |
ef59abfb TG |
920 | data->known_tasks_length = 1; |
921 | ||
922 | sym = lookup_symbol_in_language (KNOWN_TASKS_LIST, NULL, VAR_DOMAIN, | |
d12307c1 | 923 | language_c, NULL).symbol; |
ef59abfb TG |
924 | if (sym != NULL && SYMBOL_VALUE_ADDRESS (sym) != 0) |
925 | { | |
926 | /* Validate. */ | |
927 | struct type *type = check_typedef (SYMBOL_TYPE (sym)); | |
928 | ||
929 | if (TYPE_CODE (type) == TYPE_CODE_PTR) | |
930 | { | |
931 | data->known_tasks_element = type; | |
932 | return; | |
933 | } | |
934 | } | |
935 | ||
936 | /* Fallback to default values. */ | |
937 | data->known_tasks_element = | |
f5656ead | 938 | builtin_type (target_gdbarch ())->builtin_data_ptr; |
ef59abfb | 939 | data->known_tasks_length = 1; |
e225eb91 JB |
940 | return; |
941 | } | |
942 | ||
ef59abfb TG |
943 | /* Can't find tasks. */ |
944 | ||
e225eb91 JB |
945 | data->known_tasks_kind = ADA_TASKS_NOT_FOUND; |
946 | data->known_tasks_addr = 0; | |
947 | } | |
948 | ||
949 | /* Read the known tasks from the current inferior's memory, and store it | |
950 | in the current inferior's data TASK_LIST. | |
951 | Return non-zero upon success. */ | |
6040a59d JB |
952 | |
953 | static int | |
954 | read_known_tasks (void) | |
955 | { | |
e225eb91 JB |
956 | struct ada_tasks_inferior_data *data = |
957 | get_ada_tasks_inferior_data (current_inferior ()); | |
6040a59d JB |
958 | |
959 | /* Step 1: Clear the current list, if necessary. */ | |
c645cda4 | 960 | data->task_list.clear (); |
6040a59d JB |
961 | |
962 | /* Step 2: do the real work. | |
963 | If the application does not use task, then no more needs to be done. | |
964 | It is important to have the task list cleared (see above) before we | |
965 | return, as we don't want a stale task list to be used... This can | |
966 | happen for instance when debugging a non-multitasking program after | |
967 | having debugged a multitasking one. */ | |
ef59abfb | 968 | ada_tasks_inferior_data_sniffer (data); |
e225eb91 JB |
969 | gdb_assert (data->known_tasks_kind != ADA_TASKS_UNKNOWN); |
970 | ||
971 | switch (data->known_tasks_kind) | |
6040a59d | 972 | { |
e225eb91 JB |
973 | case ADA_TASKS_NOT_FOUND: /* Tasking not in use in inferior. */ |
974 | return 0; | |
975 | case ADA_TASKS_ARRAY: | |
ef59abfb | 976 | return read_known_tasks_array (data); |
e225eb91 | 977 | case ADA_TASKS_LIST: |
ef59abfb | 978 | return read_known_tasks_list (data); |
6040a59d JB |
979 | } |
980 | ||
e225eb91 | 981 | /* Step 3: Set task_list_valid_p, to avoid re-reading the Known_Tasks |
0ef643c8 | 982 | array unless needed. Then report a success. */ |
e225eb91 | 983 | data->task_list_valid_p = 1; |
0ef643c8 JB |
984 | |
985 | return 1; | |
986 | } | |
987 | ||
79779fa9 JB |
988 | /* Build the task_list by reading the Known_Tasks array from |
989 | the inferior, and return the number of tasks in that list | |
990 | (zero means that the program is not using tasking at all). */ | |
0ef643c8 JB |
991 | |
992 | int | |
79779fa9 | 993 | ada_build_task_list (void) |
0ef643c8 | 994 | { |
e225eb91 JB |
995 | struct ada_tasks_inferior_data *data; |
996 | ||
0ef643c8 JB |
997 | if (!target_has_stack) |
998 | error (_("Cannot inspect Ada tasks when program is not running")); | |
999 | ||
e225eb91 JB |
1000 | data = get_ada_tasks_inferior_data (current_inferior ()); |
1001 | if (!data->task_list_valid_p) | |
6040a59d | 1002 | read_known_tasks (); |
0ef643c8 | 1003 | |
c645cda4 | 1004 | return data->task_list.size (); |
0ef643c8 JB |
1005 | } |
1006 | ||
a8123151 JB |
1007 | /* Print a table providing a short description of all Ada tasks |
1008 | running inside inferior INF. If ARG_STR is set, it will be | |
1009 | interpreted as a task number, and the table will be limited to | |
1010 | that task only. */ | |
0ef643c8 | 1011 | |
75082e8c | 1012 | void |
a8123151 JB |
1013 | print_ada_task_info (struct ui_out *uiout, |
1014 | char *arg_str, | |
1015 | struct inferior *inf) | |
0ef643c8 | 1016 | { |
a8123151 JB |
1017 | struct ada_tasks_inferior_data *data; |
1018 | int taskno, nb_tasks; | |
1019 | int taskno_arg = 0; | |
6005b210 | 1020 | int nb_columns; |
0ef643c8 | 1021 | |
a8123151 JB |
1022 | if (ada_build_task_list () == 0) |
1023 | { | |
112e8700 | 1024 | uiout->message (_("Your application does not use any Ada tasks.\n")); |
a8123151 JB |
1025 | return; |
1026 | } | |
0ef643c8 | 1027 | |
a8123151 JB |
1028 | if (arg_str != NULL && arg_str[0] != '\0') |
1029 | taskno_arg = value_as_long (parse_and_eval (arg_str)); | |
0ef643c8 | 1030 | |
112e8700 | 1031 | if (uiout->is_mi_like_p ()) |
6005b210 JB |
1032 | /* In GDB/MI mode, we want to provide the thread ID corresponding |
1033 | to each task. This allows clients to quickly find the thread | |
1034 | associated to any task, which is helpful for commands that | |
1035 | take a --thread argument. However, in order to be able to | |
1036 | provide that thread ID, the thread list must be up to date | |
1037 | first. */ | |
e8032dde | 1038 | target_update_thread_list (); |
6005b210 | 1039 | |
a8123151 | 1040 | data = get_ada_tasks_inferior_data (inf); |
6cda5a20 JB |
1041 | |
1042 | /* Compute the number of tasks that are going to be displayed | |
1043 | in the output. If an argument was given, there will be | |
1044 | at most 1 entry. Otherwise, there will be as many entries | |
1045 | as we have tasks. */ | |
1046 | if (taskno_arg) | |
1047 | { | |
c645cda4 | 1048 | if (taskno_arg > 0 && taskno_arg <= data->task_list.size ()) |
6cda5a20 JB |
1049 | nb_tasks = 1; |
1050 | else | |
1051 | nb_tasks = 0; | |
1052 | } | |
1053 | else | |
c645cda4 | 1054 | nb_tasks = data->task_list.size (); |
0ef643c8 | 1055 | |
112e8700 | 1056 | nb_columns = uiout->is_mi_like_p () ? 8 : 7; |
4a2b031d | 1057 | ui_out_emit_table table_emitter (uiout, nb_columns, nb_tasks, "tasks"); |
112e8700 SM |
1058 | uiout->table_header (1, ui_left, "current", ""); |
1059 | uiout->table_header (3, ui_right, "id", "ID"); | |
1060 | uiout->table_header (9, ui_right, "task-id", "TID"); | |
6005b210 JB |
1061 | /* The following column is provided in GDB/MI mode only because |
1062 | it is only really useful in that mode, and also because it | |
1063 | allows us to keep the CLI output shorter and more compact. */ | |
112e8700 SM |
1064 | if (uiout->is_mi_like_p ()) |
1065 | uiout->table_header (4, ui_right, "thread-id", ""); | |
1066 | uiout->table_header (4, ui_right, "parent-id", "P-ID"); | |
1067 | uiout->table_header (3, ui_right, "priority", "Pri"); | |
1068 | uiout->table_header (22, ui_left, "state", "State"); | |
a8123151 JB |
1069 | /* Use ui_noalign for the last column, to prevent the CLI uiout |
1070 | from printing an extra space at the end of each row. This | |
1071 | is a bit of a hack, but does get the job done. */ | |
112e8700 SM |
1072 | uiout->table_header (1, ui_noalign, "name", "Name"); |
1073 | uiout->table_body (); | |
0ef643c8 | 1074 | |
c645cda4 | 1075 | for (taskno = 1; taskno <= data->task_list.size (); taskno++) |
a8123151 JB |
1076 | { |
1077 | const struct ada_task_info *const task_info = | |
c645cda4 | 1078 | &data->task_list[taskno - 1]; |
a8123151 | 1079 | int parent_id; |
0ef643c8 | 1080 | |
a8123151 | 1081 | gdb_assert (task_info != NULL); |
0ef643c8 | 1082 | |
a8123151 JB |
1083 | /* If the user asked for the output to be restricted |
1084 | to one task only, and this is not the task, skip | |
1085 | to the next one. */ | |
1086 | if (taskno_arg && taskno != taskno_arg) | |
1087 | continue; | |
0ef643c8 | 1088 | |
2e783024 | 1089 | ui_out_emit_tuple tuple_emitter (uiout, NULL); |
0ef643c8 | 1090 | |
a8123151 JB |
1091 | /* Print a star if this task is the current task (or the task |
1092 | currently selected). */ | |
d7e15655 | 1093 | if (task_info->ptid == inferior_ptid) |
112e8700 | 1094 | uiout->field_string ("current", "*"); |
a8123151 | 1095 | else |
112e8700 | 1096 | uiout->field_skip ("current"); |
0ef643c8 | 1097 | |
a8123151 | 1098 | /* Print the task number. */ |
112e8700 | 1099 | uiout->field_int ("id", taskno); |
0ef643c8 | 1100 | |
a8123151 | 1101 | /* Print the Task ID. */ |
112e8700 | 1102 | uiout->field_fmt ("task-id", "%9lx", (long) task_info->task_id); |
0ef643c8 | 1103 | |
6005b210 | 1104 | /* Print the associated Thread ID. */ |
112e8700 | 1105 | if (uiout->is_mi_like_p ()) |
6005b210 | 1106 | { |
00431a78 | 1107 | thread_info *thread = find_thread_ptid (task_info->ptid); |
6005b210 | 1108 | |
00431a78 PA |
1109 | if (thread != NULL) |
1110 | uiout->field_int ("thread-id", thread->global_num); | |
6005b210 JB |
1111 | else |
1112 | /* This should never happen unless there is a bug somewhere, | |
1113 | but be resilient when that happens. */ | |
112e8700 | 1114 | uiout->field_skip ("thread-id"); |
6005b210 JB |
1115 | } |
1116 | ||
a8123151 JB |
1117 | /* Print the ID of the parent task. */ |
1118 | parent_id = get_task_number_from_id (task_info->parent, inf); | |
1119 | if (parent_id) | |
112e8700 | 1120 | uiout->field_int ("parent-id", parent_id); |
a8123151 | 1121 | else |
112e8700 | 1122 | uiout->field_skip ("parent-id"); |
a8123151 JB |
1123 | |
1124 | /* Print the base priority of the task. */ | |
112e8700 | 1125 | uiout->field_int ("priority", task_info->priority); |
a8123151 JB |
1126 | |
1127 | /* Print the task current state. */ | |
1128 | if (task_info->caller_task) | |
112e8700 | 1129 | uiout->field_fmt ("state", |
a8123151 JB |
1130 | _("Accepting RV with %-4d"), |
1131 | get_task_number_from_id (task_info->caller_task, | |
1132 | inf)); | |
1133 | else if (task_info->state == Entry_Caller_Sleep | |
1134 | && task_info->called_task) | |
112e8700 | 1135 | uiout->field_fmt ("state", |
a8123151 JB |
1136 | _("Waiting on RV with %-3d"), |
1137 | get_task_number_from_id (task_info->called_task, | |
1138 | inf)); | |
1139 | else | |
112e8700 | 1140 | uiout->field_string ("state", task_states[task_info->state]); |
a8123151 JB |
1141 | |
1142 | /* Finally, print the task name. */ | |
112e8700 | 1143 | uiout->field_fmt ("name", |
a8123151 JB |
1144 | "%s", |
1145 | task_info->name[0] != '\0' ? task_info->name | |
1146 | : _("<no name>")); | |
1147 | ||
112e8700 | 1148 | uiout->text ("\n"); |
a8123151 | 1149 | } |
0ef643c8 JB |
1150 | } |
1151 | ||
e225eb91 JB |
1152 | /* Print a detailed description of the Ada task whose ID is TASKNO_STR |
1153 | for the given inferior (INF). */ | |
0ef643c8 JB |
1154 | |
1155 | static void | |
1d12d88f | 1156 | info_task (struct ui_out *uiout, const char *taskno_str, struct inferior *inf) |
0ef643c8 JB |
1157 | { |
1158 | const int taskno = value_as_long (parse_and_eval (taskno_str)); | |
1159 | struct ada_task_info *task_info; | |
1160 | int parent_taskno = 0; | |
e225eb91 | 1161 | struct ada_tasks_inferior_data *data = get_ada_tasks_inferior_data (inf); |
0ef643c8 | 1162 | |
a8123151 JB |
1163 | if (ada_build_task_list () == 0) |
1164 | { | |
112e8700 | 1165 | uiout->message (_("Your application does not use any Ada tasks.\n")); |
a8123151 JB |
1166 | return; |
1167 | } | |
1168 | ||
c645cda4 | 1169 | if (taskno <= 0 || taskno > data->task_list.size ()) |
0ef643c8 JB |
1170 | error (_("Task ID %d not known. Use the \"info tasks\" command to\n" |
1171 | "see the IDs of currently known tasks"), taskno); | |
c645cda4 | 1172 | task_info = &data->task_list[taskno - 1]; |
0ef643c8 JB |
1173 | |
1174 | /* Print the Ada task ID. */ | |
5af949e3 | 1175 | printf_filtered (_("Ada Task: %s\n"), |
f5656ead | 1176 | paddress (target_gdbarch (), task_info->task_id)); |
0ef643c8 JB |
1177 | |
1178 | /* Print the name of the task. */ | |
1179 | if (task_info->name[0] != '\0') | |
1180 | printf_filtered (_("Name: %s\n"), task_info->name); | |
1181 | else | |
1182 | printf_filtered (_("<no name>\n")); | |
1183 | ||
1184 | /* Print the TID and LWP. */ | |
cc6bcb54 | 1185 | printf_filtered (_("Thread: %#lx\n"), task_info->ptid.tid ()); |
e38504b3 | 1186 | printf_filtered (_("LWP: %#lx\n"), task_info->ptid.lwp ()); |
0ef643c8 | 1187 | |
65d40437 JB |
1188 | /* If set, print the base CPU. */ |
1189 | if (task_info->base_cpu != 0) | |
1190 | printf_filtered (_("Base CPU: %d\n"), task_info->base_cpu); | |
1191 | ||
0ef643c8 JB |
1192 | /* Print who is the parent (if any). */ |
1193 | if (task_info->parent != 0) | |
e225eb91 | 1194 | parent_taskno = get_task_number_from_id (task_info->parent, inf); |
0ef643c8 JB |
1195 | if (parent_taskno) |
1196 | { | |
c645cda4 | 1197 | struct ada_task_info *parent = &data->task_list[parent_taskno - 1]; |
0ef643c8 JB |
1198 | |
1199 | printf_filtered (_("Parent: %d"), parent_taskno); | |
1200 | if (parent->name[0] != '\0') | |
1201 | printf_filtered (" (%s)", parent->name); | |
1202 | printf_filtered ("\n"); | |
1203 | } | |
1204 | else | |
1205 | printf_filtered (_("No parent\n")); | |
1206 | ||
1207 | /* Print the base priority. */ | |
1208 | printf_filtered (_("Base Priority: %d\n"), task_info->priority); | |
1209 | ||
1210 | /* print the task current state. */ | |
1211 | { | |
1212 | int target_taskno = 0; | |
1213 | ||
1214 | if (task_info->caller_task) | |
1215 | { | |
e225eb91 | 1216 | target_taskno = get_task_number_from_id (task_info->caller_task, inf); |
0ef643c8 JB |
1217 | printf_filtered (_("State: Accepting rendezvous with %d"), |
1218 | target_taskno); | |
1219 | } | |
1220 | else if (task_info->state == Entry_Caller_Sleep && task_info->called_task) | |
1221 | { | |
e225eb91 | 1222 | target_taskno = get_task_number_from_id (task_info->called_task, inf); |
0ef643c8 JB |
1223 | printf_filtered (_("State: Waiting on task %d's entry"), |
1224 | target_taskno); | |
1225 | } | |
1226 | else | |
d6b67a5e | 1227 | printf_filtered (_("State: %s"), _(long_task_states[task_info->state])); |
0ef643c8 JB |
1228 | |
1229 | if (target_taskno) | |
1230 | { | |
c645cda4 | 1231 | ada_task_info *target_task_info = &data->task_list[target_taskno - 1]; |
0ef643c8 JB |
1232 | |
1233 | if (target_task_info->name[0] != '\0') | |
1234 | printf_filtered (" (%s)", target_task_info->name); | |
1235 | } | |
1236 | ||
1237 | printf_filtered ("\n"); | |
1238 | } | |
1239 | } | |
1240 | ||
1241 | /* If ARG is empty or null, then print a list of all Ada tasks. | |
1242 | Otherwise, print detailed information about the task whose ID | |
1243 | is ARG. | |
1244 | ||
1245 | Does nothing if the program doesn't use Ada tasking. */ | |
1246 | ||
1247 | static void | |
1d12d88f | 1248 | info_tasks_command (const char *arg, int from_tty) |
0ef643c8 | 1249 | { |
79779fa9 | 1250 | struct ui_out *uiout = current_uiout; |
0ef643c8 | 1251 | |
0ef643c8 | 1252 | if (arg == NULL || *arg == '\0') |
a8123151 | 1253 | print_ada_task_info (uiout, NULL, current_inferior ()); |
0ef643c8 | 1254 | else |
a8123151 | 1255 | info_task (uiout, arg, current_inferior ()); |
0ef643c8 JB |
1256 | } |
1257 | ||
1258 | /* Print a message telling the user id of the current task. | |
1259 | This function assumes that tasking is in use in the inferior. */ | |
1260 | ||
1261 | static void | |
1262 | display_current_task_id (void) | |
1263 | { | |
00431a78 | 1264 | const int current_task = ada_get_task_number (inferior_thread ()); |
0ef643c8 JB |
1265 | |
1266 | if (current_task == 0) | |
1267 | printf_filtered (_("[Current task is unknown]\n")); | |
1268 | else | |
1269 | printf_filtered (_("[Current task is %d]\n"), current_task); | |
1270 | } | |
1271 | ||
1272 | /* Parse and evaluate TIDSTR into a task id, and try to switch to | |
1273 | that task. Print an error message if the task switch failed. */ | |
1274 | ||
1275 | static void | |
643c2ffa | 1276 | task_command_1 (const char *taskno_str, int from_tty, struct inferior *inf) |
0ef643c8 JB |
1277 | { |
1278 | const int taskno = value_as_long (parse_and_eval (taskno_str)); | |
1279 | struct ada_task_info *task_info; | |
e225eb91 | 1280 | struct ada_tasks_inferior_data *data = get_ada_tasks_inferior_data (inf); |
0ef643c8 | 1281 | |
c645cda4 | 1282 | if (taskno <= 0 || taskno > data->task_list.size ()) |
0ef643c8 JB |
1283 | error (_("Task ID %d not known. Use the \"info tasks\" command to\n" |
1284 | "see the IDs of currently known tasks"), taskno); | |
c645cda4 | 1285 | task_info = &data->task_list[taskno - 1]; |
0ef643c8 JB |
1286 | |
1287 | if (!ada_task_is_alive (task_info)) | |
1288 | error (_("Cannot switch to task %d: Task is no longer running"), taskno); | |
1289 | ||
5e7b5f74 JB |
1290 | /* On some platforms, the thread list is not updated until the user |
1291 | performs a thread-related operation (by using the "info threads" | |
1292 | command, for instance). So this thread list may not be up to date | |
1293 | when the user attempts this task switch. Since we cannot switch | |
1294 | to the thread associated to our task if GDB does not know about | |
1295 | that thread, we need to make sure that any new threads gets added | |
1296 | to the thread list. */ | |
e8032dde | 1297 | target_update_thread_list (); |
5e7b5f74 | 1298 | |
b8d088ac JB |
1299 | /* Verify that the ptid of the task we want to switch to is valid |
1300 | (in other words, a ptid that GDB knows about). Otherwise, we will | |
1301 | cause an assertion failure later on, when we try to determine | |
1302 | the ptid associated thread_info data. We should normally never | |
1303 | encounter such an error, but the wrong ptid can actually easily be | |
1304 | computed if target_get_ada_task_ptid has not been implemented for | |
1305 | our target (yet). Rather than cause an assertion error in that case, | |
1306 | it's nicer for the user to just refuse to perform the task switch. */ | |
00431a78 PA |
1307 | thread_info *tp = find_thread_ptid (task_info->ptid); |
1308 | if (tp == NULL) | |
b8d088ac JB |
1309 | error (_("Unable to compute thread ID for task %d.\n" |
1310 | "Cannot switch to this task."), | |
1311 | taskno); | |
1312 | ||
00431a78 | 1313 | switch_to_thread (tp); |
0ef643c8 JB |
1314 | ada_find_printable_frame (get_selected_frame (NULL)); |
1315 | printf_filtered (_("[Switching to task %d]\n"), taskno); | |
1316 | print_stack_frame (get_selected_frame (NULL), | |
d1da0587 | 1317 | frame_relative_level (get_selected_frame (NULL)), |
08d72866 | 1318 | SRC_AND_LOC, 1); |
0ef643c8 JB |
1319 | } |
1320 | ||
1321 | ||
1322 | /* Print the ID of the current task if TASKNO_STR is empty or NULL. | |
1323 | Otherwise, switch to the task indicated by TASKNO_STR. */ | |
1324 | ||
1325 | static void | |
643c2ffa | 1326 | task_command (const char *taskno_str, int from_tty) |
0ef643c8 | 1327 | { |
79779fa9 | 1328 | struct ui_out *uiout = current_uiout; |
0ef643c8 | 1329 | |
79779fa9 JB |
1330 | if (ada_build_task_list () == 0) |
1331 | { | |
112e8700 | 1332 | uiout->message (_("Your application does not use any Ada tasks.\n")); |
79779fa9 JB |
1333 | return; |
1334 | } | |
0ef643c8 JB |
1335 | |
1336 | if (taskno_str == NULL || taskno_str[0] == '\0') | |
1337 | display_current_task_id (); | |
1338 | else | |
e05fa6f9 | 1339 | task_command_1 (taskno_str, from_tty, current_inferior ()); |
0ef643c8 JB |
1340 | } |
1341 | ||
e225eb91 JB |
1342 | /* Indicate that the given inferior's task list may have changed, |
1343 | so invalidate the cache. */ | |
0ef643c8 | 1344 | |
2c0b251b | 1345 | static void |
e225eb91 | 1346 | ada_task_list_changed (struct inferior *inf) |
0ef643c8 | 1347 | { |
e225eb91 JB |
1348 | struct ada_tasks_inferior_data *data = get_ada_tasks_inferior_data (inf); |
1349 | ||
1350 | data->task_list_valid_p = 0; | |
0ef643c8 JB |
1351 | } |
1352 | ||
6da9ca05 JB |
1353 | /* Invalidate the per-program-space data. */ |
1354 | ||
1355 | static void | |
1356 | ada_tasks_invalidate_pspace_data (struct program_space *pspace) | |
1357 | { | |
1358 | get_ada_tasks_pspace_data (pspace)->initialized_p = 0; | |
1359 | } | |
1360 | ||
e225eb91 JB |
1361 | /* Invalidate the per-inferior data. */ |
1362 | ||
1363 | static void | |
1364 | ada_tasks_invalidate_inferior_data (struct inferior *inf) | |
1365 | { | |
1366 | struct ada_tasks_inferior_data *data = get_ada_tasks_inferior_data (inf); | |
1367 | ||
1368 | data->known_tasks_kind = ADA_TASKS_UNKNOWN; | |
1369 | data->task_list_valid_p = 0; | |
1370 | } | |
1371 | ||
0ef643c8 JB |
1372 | /* The 'normal_stop' observer notification callback. */ |
1373 | ||
1374 | static void | |
143adbbf | 1375 | ada_tasks_normal_stop_observer (struct bpstats *unused_args, int unused_args2) |
0ef643c8 JB |
1376 | { |
1377 | /* The inferior has been resumed, and just stopped. This means that | |
1378 | our task_list needs to be recomputed before it can be used again. */ | |
e225eb91 | 1379 | ada_task_list_changed (current_inferior ()); |
0ef643c8 JB |
1380 | } |
1381 | ||
1382 | /* A routine to be called when the objfiles have changed. */ | |
1383 | ||
2c0b251b | 1384 | static void |
143adbbf | 1385 | ada_tasks_new_objfile_observer (struct objfile *objfile) |
0ef643c8 | 1386 | { |
e225eb91 | 1387 | struct inferior *inf; |
0ef643c8 | 1388 | |
6da9ca05 | 1389 | /* Invalidate the relevant data in our program-space data. */ |
0ef643c8 | 1390 | |
6da9ca05 JB |
1391 | if (objfile == NULL) |
1392 | { | |
1393 | /* All objfiles are being cleared, so we should clear all | |
1394 | our caches for all program spaces. */ | |
1395 | struct program_space *pspace; | |
1396 | ||
1397 | for (pspace = program_spaces; pspace != NULL; pspace = pspace->next) | |
1398 | ada_tasks_invalidate_pspace_data (pspace); | |
1399 | } | |
1400 | else | |
1401 | { | |
1402 | /* The associated program-space data might have changed after | |
1403 | this objfile was added. Invalidate all cached data. */ | |
1404 | ada_tasks_invalidate_pspace_data (objfile->pspace); | |
1405 | } | |
e225eb91 JB |
1406 | |
1407 | /* Invalidate the per-inferior cache for all inferiors using | |
1408 | this objfile (or, in other words, for all inferiors who have | |
1409 | the same program-space as the objfile's program space). | |
1410 | If all objfiles are being cleared (OBJFILE is NULL), then | |
1411 | clear the caches for all inferiors. */ | |
1412 | ||
1413 | for (inf = inferior_list; inf != NULL; inf = inf->next) | |
1414 | if (objfile == NULL || inf->pspace == objfile->pspace) | |
1415 | ada_tasks_invalidate_inferior_data (inf); | |
0ef643c8 JB |
1416 | } |
1417 | ||
1418 | void | |
1419 | _initialize_tasks (void) | |
1420 | { | |
6da9ca05 | 1421 | ada_tasks_pspace_data_handle = register_program_space_data (); |
e225eb91 | 1422 | ada_tasks_inferior_data_handle = register_inferior_data (); |
6da9ca05 | 1423 | |
0ef643c8 | 1424 | /* Attach various observers. */ |
76727919 TT |
1425 | gdb::observers::normal_stop.attach (ada_tasks_normal_stop_observer); |
1426 | gdb::observers::new_objfile.attach (ada_tasks_new_objfile_observer); | |
0ef643c8 JB |
1427 | |
1428 | /* Some new commands provided by this module. */ | |
1429 | add_info ("tasks", info_tasks_command, | |
1430 | _("Provide information about all known Ada tasks")); | |
1431 | add_cmd ("task", class_run, task_command, | |
1432 | _("Use this command to switch between Ada tasks.\n\ | |
1433 | Without argument, this command simply prints the current task ID"), | |
1434 | &cmdlist); | |
1435 | } |