Commit | Line | Data |
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036b1ba8 JB |
1 | /* Ada Ravenscar thread support. |
2 | ||
e2882c85 | 3 | Copyright (C) 2004-2018 Free Software Foundation, Inc. |
036b1ba8 JB |
4 | |
5 | This file is part of GDB. | |
6 | ||
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 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
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. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #include "defs.h" | |
21 | #include "gdbcore.h" | |
22 | #include "gdbthread.h" | |
23 | #include "ada-lang.h" | |
24 | #include "target.h" | |
25 | #include "inferior.h" | |
26 | #include "command.h" | |
27 | #include "ravenscar-thread.h" | |
76727919 | 28 | #include "observable.h" |
036b1ba8 JB |
29 | #include "gdbcmd.h" |
30 | #include "top.h" | |
31 | #include "regcache.h" | |
77e371c0 | 32 | #include "objfiles.h" |
036b1ba8 | 33 | |
9edcc12f JB |
34 | /* This module provides support for "Ravenscar" tasks (Ada) when |
35 | debugging on bare-metal targets. | |
36 | ||
37 | The typical situation is when debugging a bare-metal target over | |
38 | the remote protocol. In that situation, the system does not know | |
39 | about high-level comcepts such as threads, only about some code | |
40 | running on one or more CPUs. And since the remote protocol does not | |
41 | provide any handling for CPUs, the de facto standard for handling | |
42 | them is to have one thread per CPU, where the thread's ptid has | |
43 | its lwp field set to the CPU number (eg: 1 for the first CPU, | |
44 | 2 for the second one, etc). This module will make that assumption. | |
45 | ||
46 | This module then creates and maintains the list of threads based | |
47 | on the list of Ada tasks, with one thread per Ada tasks. The convention | |
48 | is that threads corresponding to the CPUs (see assumption above) | |
49 | have a ptid_t of the form (PID, LWP, 0), which threads corresponding | |
50 | to our Ada tasks have a ptid_t of the form (PID, 0, TID) where TID | |
51 | is the Ada task's ID as extracted from Ada runtime information. | |
52 | ||
53 | Switching to a given Ada tasks (or its underlying thread) is performed | |
54 | by fetching the registers of that tasks from the memory area where | |
55 | the registers were saved. For any of the other operations, the | |
56 | operation is performed by first finding the CPU on which the task | |
57 | is running, switching to its corresponding ptid, and then performing | |
58 | the operation on that ptid using the target beneath us. */ | |
59 | ||
036b1ba8 JB |
60 | /* If non-null, ravenscar task support is enabled. */ |
61 | static int ravenscar_task_support = 1; | |
62 | ||
9edcc12f JB |
63 | /* PTID of the last thread that received an event. |
64 | This can be useful to determine the associated task that received | |
65 | the event, to make it the current task. */ | |
036b1ba8 JB |
66 | static ptid_t base_ptid; |
67 | ||
7f39f34a | 68 | static const char running_thread_name[] = "__gnat_running_thread_table"; |
036b1ba8 JB |
69 | |
70 | static const char known_tasks_name[] = "system__tasking__debug__known_tasks"; | |
6040a59d | 71 | static const char first_task_name[] = "system__tasking__debug__first_task"; |
036b1ba8 | 72 | |
0df8b418 MS |
73 | static const char ravenscar_runtime_initializer[] = |
74 | "system__bb__threads__initialize"; | |
036b1ba8 | 75 | |
d9f719f1 PA |
76 | static const target_info ravenscar_target_info = { |
77 | "ravenscar", | |
78 | N_("Ravenscar tasks."), | |
79 | N_("Ravenscar tasks support.") | |
80 | }; | |
81 | ||
f6ac5f3d PA |
82 | struct ravenscar_thread_target final : public target_ops |
83 | { | |
d9f719f1 PA |
84 | const target_info &info () const override |
85 | { return ravenscar_target_info; } | |
f6ac5f3d | 86 | |
66b4deae PA |
87 | strata stratum () const override { return thread_stratum; } |
88 | ||
f6ac5f3d PA |
89 | ptid_t wait (ptid_t, struct target_waitstatus *, int) override; |
90 | void resume (ptid_t, int, enum gdb_signal) override; | |
91 | ||
92 | void fetch_registers (struct regcache *, int) override; | |
93 | void store_registers (struct regcache *, int) override; | |
94 | ||
95 | void prepare_to_store (struct regcache *) override; | |
96 | ||
57810aa7 | 97 | bool stopped_by_sw_breakpoint () override; |
f6ac5f3d | 98 | |
57810aa7 | 99 | bool stopped_by_hw_breakpoint () override; |
f6ac5f3d | 100 | |
57810aa7 | 101 | bool stopped_by_watchpoint () override; |
f6ac5f3d | 102 | |
57810aa7 | 103 | bool stopped_data_address (CORE_ADDR *) override; |
f6ac5f3d | 104 | |
57810aa7 | 105 | bool thread_alive (ptid_t ptid) override; |
f6ac5f3d PA |
106 | |
107 | int core_of_thread (ptid_t ptid) override; | |
108 | ||
109 | void update_thread_list () override; | |
110 | ||
111 | const char *extra_thread_info (struct thread_info *) override; | |
112 | ||
113 | const char *pid_to_str (ptid_t) override; | |
114 | ||
115 | ptid_t get_ada_task_ptid (long lwp, long thread) override; | |
116 | ||
117 | void mourn_inferior () override; | |
f6ac5f3d PA |
118 | }; |
119 | ||
120 | /* This module's target-specific operations. */ | |
121 | static ravenscar_thread_target ravenscar_ops; | |
122 | ||
9edcc12f | 123 | static ptid_t ravenscar_active_task (int cpu); |
036b1ba8 JB |
124 | static void ravenscar_update_inferior_ptid (void); |
125 | static int has_ravenscar_runtime (void); | |
126 | static int ravenscar_runtime_initialized (void); | |
127 | static void ravenscar_inferior_created (struct target_ops *target, | |
128 | int from_tty); | |
129 | ||
9edcc12f JB |
130 | /* Return nonzero iff PTID corresponds to a ravenscar task. */ |
131 | ||
132 | static int | |
133 | is_ravenscar_task (ptid_t ptid) | |
134 | { | |
54aa6c67 JB |
135 | /* By construction, ravenscar tasks have their LWP set to zero. |
136 | Also make sure that the TID is nonzero, as some remotes, when | |
137 | asked for the list of threads, will return the first thread | |
138 | as having its TID set to zero. For instance, TSIM version | |
139 | 2.0.48 for LEON3 sends 'm0' as a reply to the 'qfThreadInfo' | |
140 | query, which the remote protocol layer then treats as a thread | |
141 | whose TID is 0. This is obviously not a ravenscar task. */ | |
cc6bcb54 | 142 | return ptid.lwp () == 0 && ptid.tid () != 0; |
9edcc12f JB |
143 | } |
144 | ||
145 | /* Given PTID, which can be either a ravenscar task or a CPU thread, | |
146 | return which CPU that ptid is running on. | |
147 | ||
148 | This assume that PTID is a valid ptid_t. Otherwise, a gdb_assert | |
149 | will be triggered. */ | |
150 | ||
151 | static int | |
152 | ravenscar_get_thread_base_cpu (ptid_t ptid) | |
153 | { | |
154 | int base_cpu; | |
155 | ||
156 | if (is_ravenscar_task (ptid)) | |
157 | { | |
158 | struct ada_task_info *task_info = ada_get_task_info_from_ptid (ptid); | |
159 | ||
160 | gdb_assert (task_info != NULL); | |
161 | base_cpu = task_info->base_cpu; | |
162 | } | |
163 | else | |
164 | { | |
165 | /* We assume that the LWP of the PTID is equal to the CPU number. */ | |
e38504b3 | 166 | base_cpu = ptid.lwp (); |
9edcc12f JB |
167 | } |
168 | ||
169 | return base_cpu; | |
170 | } | |
171 | ||
172 | /* Given a ravenscar task (identified by its ptid_t PTID), return nonzero | |
173 | if this task is the currently active task on the cpu that task is | |
174 | running on. | |
175 | ||
176 | In other words, this function determine which CPU this task is | |
177 | currently running on, and then return nonzero if the CPU in question | |
178 | is executing the code for that task. If that's the case, then | |
179 | that task's registers are in the CPU bank. Otherwise, the task | |
180 | is currently suspended, and its registers have been saved in memory. */ | |
181 | ||
182 | static int | |
183 | ravenscar_task_is_currently_active (ptid_t ptid) | |
184 | { | |
185 | ptid_t active_task_ptid | |
186 | = ravenscar_active_task (ravenscar_get_thread_base_cpu (ptid)); | |
187 | ||
d7e15655 | 188 | return ptid == active_task_ptid; |
9edcc12f JB |
189 | } |
190 | ||
191 | /* Return the CPU thread (as a ptid_t) on which the given ravenscar | |
192 | task is running. | |
193 | ||
194 | This is the thread that corresponds to the CPU on which the task | |
195 | is running. */ | |
196 | ||
197 | static ptid_t | |
198 | get_base_thread_from_ravenscar_task (ptid_t ptid) | |
199 | { | |
200 | int base_cpu; | |
201 | ||
202 | if (!is_ravenscar_task (ptid)) | |
203 | return ptid; | |
204 | ||
205 | base_cpu = ravenscar_get_thread_base_cpu (ptid); | |
e99b03dc | 206 | return ptid_t (ptid.pid (), base_cpu, 0); |
9edcc12f JB |
207 | } |
208 | ||
036b1ba8 JB |
209 | /* Fetch the ravenscar running thread from target memory and |
210 | update inferior_ptid accordingly. */ | |
211 | ||
212 | static void | |
213 | ravenscar_update_inferior_ptid (void) | |
214 | { | |
9edcc12f JB |
215 | int base_cpu; |
216 | ||
036b1ba8 JB |
217 | base_ptid = inferior_ptid; |
218 | ||
9edcc12f JB |
219 | gdb_assert (!is_ravenscar_task (inferior_ptid)); |
220 | base_cpu = ravenscar_get_thread_base_cpu (base_ptid); | |
221 | ||
036b1ba8 JB |
222 | /* If the runtime has not been initialized yet, the inferior_ptid is |
223 | the only ptid that there is. */ | |
224 | if (!ravenscar_runtime_initialized ()) | |
225 | return; | |
226 | ||
9edcc12f | 227 | /* Make sure we set base_ptid before calling ravenscar_active_task |
036b1ba8 | 228 | as the latter relies on it. */ |
9edcc12f | 229 | inferior_ptid = ravenscar_active_task (base_cpu); |
d7e15655 | 230 | gdb_assert (inferior_ptid != null_ptid); |
036b1ba8 JB |
231 | |
232 | /* The running thread may not have been added to | |
e8032dde | 233 | system.tasking.debug's list yet; so ravenscar_update_thread_list |
036b1ba8 JB |
234 | may not always add it to the thread list. Add it here. */ |
235 | if (!find_thread_ptid (inferior_ptid)) | |
236 | add_thread (inferior_ptid); | |
237 | } | |
238 | ||
7f39f34a JB |
239 | /* The Ravenscar Runtime exports a symbol which contains the ID of |
240 | the thread that is currently running. Try to locate that symbol | |
241 | and return its associated minimal symbol. | |
242 | Return NULL if not found. */ | |
243 | ||
3b7344d5 | 244 | static struct bound_minimal_symbol |
7f39f34a JB |
245 | get_running_thread_msymbol (void) |
246 | { | |
3b7344d5 | 247 | struct bound_minimal_symbol msym; |
7f39f34a JB |
248 | |
249 | msym = lookup_minimal_symbol (running_thread_name, NULL, NULL); | |
3b7344d5 | 250 | if (!msym.minsym) |
7f39f34a JB |
251 | /* Older versions of the GNAT runtime were using a different |
252 | (less ideal) name for the symbol where the active thread ID | |
253 | is stored. If we couldn't find the symbol using the latest | |
254 | name, then try the old one. */ | |
255 | msym = lookup_minimal_symbol ("running_thread", NULL, NULL); | |
256 | ||
257 | return msym; | |
258 | } | |
259 | ||
036b1ba8 JB |
260 | /* Return True if the Ada Ravenscar run-time can be found in the |
261 | application. */ | |
262 | ||
263 | static int | |
264 | has_ravenscar_runtime (void) | |
265 | { | |
3b7344d5 | 266 | struct bound_minimal_symbol msym_ravenscar_runtime_initializer = |
036b1ba8 | 267 | lookup_minimal_symbol (ravenscar_runtime_initializer, NULL, NULL); |
3b7344d5 | 268 | struct bound_minimal_symbol msym_known_tasks = |
036b1ba8 | 269 | lookup_minimal_symbol (known_tasks_name, NULL, NULL); |
3b7344d5 | 270 | struct bound_minimal_symbol msym_first_task = |
6040a59d | 271 | lookup_minimal_symbol (first_task_name, NULL, NULL); |
3b7344d5 TT |
272 | struct bound_minimal_symbol msym_running_thread |
273 | = get_running_thread_msymbol (); | |
036b1ba8 | 274 | |
3b7344d5 TT |
275 | return (msym_ravenscar_runtime_initializer.minsym |
276 | && (msym_known_tasks.minsym || msym_first_task.minsym) | |
277 | && msym_running_thread.minsym); | |
036b1ba8 JB |
278 | } |
279 | ||
280 | /* Return True if the Ada Ravenscar run-time can be found in the | |
281 | application, and if it has been initialized on target. */ | |
282 | ||
283 | static int | |
284 | ravenscar_runtime_initialized (void) | |
285 | { | |
d7e15655 | 286 | return (!(ravenscar_active_task (1) == null_ptid)); |
036b1ba8 JB |
287 | } |
288 | ||
7f39f34a JB |
289 | /* Return the ID of the thread that is currently running. |
290 | Return 0 if the ID could not be determined. */ | |
036b1ba8 JB |
291 | |
292 | static CORE_ADDR | |
9edcc12f | 293 | get_running_thread_id (int cpu) |
036b1ba8 | 294 | { |
3b7344d5 | 295 | struct bound_minimal_symbol object_msym = get_running_thread_msymbol (); |
036b1ba8 JB |
296 | int object_size; |
297 | int buf_size; | |
948f8e3d | 298 | gdb_byte *buf; |
036b1ba8 JB |
299 | CORE_ADDR object_addr; |
300 | struct type *builtin_type_void_data_ptr = | |
f5656ead | 301 | builtin_type (target_gdbarch ())->builtin_data_ptr; |
036b1ba8 | 302 | |
3b7344d5 | 303 | if (!object_msym.minsym) |
036b1ba8 JB |
304 | return 0; |
305 | ||
036b1ba8 | 306 | object_size = TYPE_LENGTH (builtin_type_void_data_ptr); |
9edcc12f JB |
307 | object_addr = (BMSYMBOL_VALUE_ADDRESS (object_msym) |
308 | + (cpu - 1) * object_size); | |
036b1ba8 | 309 | buf_size = object_size; |
224c3ddb | 310 | buf = (gdb_byte *) alloca (buf_size); |
036b1ba8 JB |
311 | read_memory (object_addr, buf, buf_size); |
312 | return extract_typed_address (buf, builtin_type_void_data_ptr); | |
313 | } | |
314 | ||
f6ac5f3d PA |
315 | void |
316 | ravenscar_thread_target::resume (ptid_t ptid, int step, enum gdb_signal siggnal) | |
036b1ba8 | 317 | { |
036b1ba8 | 318 | inferior_ptid = base_ptid; |
d6ca69cd | 319 | beneath ()->resume (base_ptid, step, siggnal); |
036b1ba8 JB |
320 | } |
321 | ||
f6ac5f3d PA |
322 | ptid_t |
323 | ravenscar_thread_target::wait (ptid_t ptid, | |
324 | struct target_waitstatus *status, | |
325 | int options) | |
036b1ba8 | 326 | { |
3b1b69bf | 327 | ptid_t event_ptid; |
036b1ba8 JB |
328 | |
329 | inferior_ptid = base_ptid; | |
d6ca69cd | 330 | event_ptid = beneath ()->wait (base_ptid, status, 0); |
bed0c243 JB |
331 | /* Find any new threads that might have been created, and update |
332 | inferior_ptid to the active thread. | |
333 | ||
334 | Only do it if the program is still alive, though. Otherwise, | |
335 | this causes problems when debugging through the remote protocol, | |
336 | because we might try switching threads (and thus sending packets) | |
337 | after the remote has disconnected. */ | |
338 | if (status->kind != TARGET_WAITKIND_EXITED | |
339 | && status->kind != TARGET_WAITKIND_SIGNALLED) | |
340 | { | |
3b1b69bf | 341 | inferior_ptid = event_ptid; |
f6ac5f3d | 342 | this->update_thread_list (); |
bed0c243 JB |
343 | ravenscar_update_inferior_ptid (); |
344 | } | |
036b1ba8 JB |
345 | return inferior_ptid; |
346 | } | |
347 | ||
348 | /* Add the thread associated to the given TASK to the thread list | |
349 | (if the thread has already been added, this is a no-op). */ | |
350 | ||
351 | static void | |
352 | ravenscar_add_thread (struct ada_task_info *task) | |
353 | { | |
354 | if (find_thread_ptid (task->ptid) == NULL) | |
355 | add_thread (task->ptid); | |
356 | } | |
357 | ||
f6ac5f3d PA |
358 | void |
359 | ravenscar_thread_target::update_thread_list () | |
036b1ba8 | 360 | { |
79779fa9 | 361 | ada_build_task_list (); |
036b1ba8 JB |
362 | |
363 | /* Do not clear the thread list before adding the Ada task, to keep | |
364 | the thread that the process stratum has included into it | |
365 | (base_ptid) and the running thread, that may not have been included | |
366 | to system.tasking.debug's list yet. */ | |
367 | ||
368 | iterate_over_live_ada_tasks (ravenscar_add_thread); | |
369 | } | |
370 | ||
371 | static ptid_t | |
9edcc12f | 372 | ravenscar_active_task (int cpu) |
036b1ba8 | 373 | { |
9edcc12f | 374 | CORE_ADDR tid = get_running_thread_id (cpu); |
036b1ba8 JB |
375 | |
376 | if (tid == 0) | |
377 | return null_ptid; | |
378 | else | |
e99b03dc | 379 | return ptid_t (base_ptid.pid (), 0, tid); |
036b1ba8 JB |
380 | } |
381 | ||
f6ac5f3d PA |
382 | const char * |
383 | ravenscar_thread_target::extra_thread_info (thread_info *tp) | |
036b1ba8 JB |
384 | { |
385 | return "Ravenscar task"; | |
386 | } | |
387 | ||
57810aa7 | 388 | bool |
f6ac5f3d | 389 | ravenscar_thread_target::thread_alive (ptid_t ptid) |
036b1ba8 JB |
390 | { |
391 | /* Ravenscar tasks are non-terminating. */ | |
57810aa7 | 392 | return true; |
036b1ba8 JB |
393 | } |
394 | ||
f6ac5f3d PA |
395 | const char * |
396 | ravenscar_thread_target::pid_to_str (ptid_t ptid) | |
036b1ba8 JB |
397 | { |
398 | static char buf[30]; | |
399 | ||
cc6bcb54 | 400 | snprintf (buf, sizeof (buf), "Thread %#x", (int) ptid.tid ()); |
036b1ba8 JB |
401 | return buf; |
402 | } | |
403 | ||
f6ac5f3d PA |
404 | void |
405 | ravenscar_thread_target::fetch_registers (struct regcache *regcache, int regnum) | |
036b1ba8 | 406 | { |
222312d3 | 407 | ptid_t ptid = regcache->ptid (); |
036b1ba8 | 408 | |
9edcc12f JB |
409 | if (ravenscar_runtime_initialized () |
410 | && is_ravenscar_task (ptid) | |
411 | && !ravenscar_task_is_currently_active (ptid)) | |
7e35103a | 412 | { |
ac7936df | 413 | struct gdbarch *gdbarch = regcache->arch (); |
7e35103a JB |
414 | struct ravenscar_arch_ops *arch_ops |
415 | = gdbarch_ravenscar_ops (gdbarch); | |
416 | ||
417 | arch_ops->to_fetch_registers (regcache, regnum); | |
418 | } | |
9edcc12f | 419 | else |
d6ca69cd | 420 | beneath ()->fetch_registers (regcache, regnum); |
036b1ba8 JB |
421 | } |
422 | ||
f6ac5f3d PA |
423 | void |
424 | ravenscar_thread_target::store_registers (struct regcache *regcache, | |
425 | int regnum) | |
036b1ba8 | 426 | { |
222312d3 | 427 | ptid_t ptid = regcache->ptid (); |
036b1ba8 | 428 | |
9edcc12f JB |
429 | if (ravenscar_runtime_initialized () |
430 | && is_ravenscar_task (ptid) | |
431 | && !ravenscar_task_is_currently_active (ptid)) | |
7e35103a | 432 | { |
ac7936df | 433 | struct gdbarch *gdbarch = regcache->arch (); |
7e35103a JB |
434 | struct ravenscar_arch_ops *arch_ops |
435 | = gdbarch_ravenscar_ops (gdbarch); | |
436 | ||
494f80a9 | 437 | arch_ops->to_store_registers (regcache, regnum); |
7e35103a | 438 | } |
9edcc12f | 439 | else |
d6ca69cd | 440 | beneath ()->store_registers (regcache, regnum); |
036b1ba8 JB |
441 | } |
442 | ||
f6ac5f3d PA |
443 | void |
444 | ravenscar_thread_target::prepare_to_store (struct regcache *regcache) | |
036b1ba8 | 445 | { |
222312d3 | 446 | ptid_t ptid = regcache->ptid (); |
036b1ba8 | 447 | |
9edcc12f JB |
448 | if (ravenscar_runtime_initialized () |
449 | && is_ravenscar_task (ptid) | |
450 | && !ravenscar_task_is_currently_active (ptid)) | |
7e35103a | 451 | { |
ac7936df | 452 | struct gdbarch *gdbarch = regcache->arch (); |
7e35103a JB |
453 | struct ravenscar_arch_ops *arch_ops |
454 | = gdbarch_ravenscar_ops (gdbarch); | |
455 | ||
494f80a9 | 456 | arch_ops->to_prepare_to_store (regcache); |
7e35103a | 457 | } |
9edcc12f | 458 | else |
d6ca69cd | 459 | beneath ()->prepare_to_store (regcache); |
036b1ba8 JB |
460 | } |
461 | ||
e02544b2 JB |
462 | /* Implement the to_stopped_by_sw_breakpoint target_ops "method". */ |
463 | ||
57810aa7 | 464 | bool |
f6ac5f3d | 465 | ravenscar_thread_target::stopped_by_sw_breakpoint () |
e02544b2 JB |
466 | { |
467 | ptid_t saved_ptid = inferior_ptid; | |
57810aa7 | 468 | bool result; |
e02544b2 | 469 | |
9edcc12f | 470 | inferior_ptid = get_base_thread_from_ravenscar_task (saved_ptid); |
d6ca69cd | 471 | result = beneath ()->stopped_by_sw_breakpoint (); |
e02544b2 JB |
472 | inferior_ptid = saved_ptid; |
473 | return result; | |
474 | } | |
475 | ||
476 | /* Implement the to_stopped_by_hw_breakpoint target_ops "method". */ | |
477 | ||
57810aa7 | 478 | bool |
f6ac5f3d | 479 | ravenscar_thread_target::stopped_by_hw_breakpoint () |
e02544b2 JB |
480 | { |
481 | ptid_t saved_ptid = inferior_ptid; | |
57810aa7 | 482 | bool result; |
e02544b2 | 483 | |
9edcc12f | 484 | inferior_ptid = get_base_thread_from_ravenscar_task (saved_ptid); |
d6ca69cd | 485 | result = beneath ()->stopped_by_hw_breakpoint (); |
e02544b2 JB |
486 | inferior_ptid = saved_ptid; |
487 | return result; | |
488 | } | |
489 | ||
490 | /* Implement the to_stopped_by_watchpoint target_ops "method". */ | |
491 | ||
57810aa7 | 492 | bool |
f6ac5f3d | 493 | ravenscar_thread_target::stopped_by_watchpoint () |
e02544b2 JB |
494 | { |
495 | ptid_t saved_ptid = inferior_ptid; | |
57810aa7 | 496 | bool result; |
e02544b2 | 497 | |
9edcc12f | 498 | inferior_ptid = get_base_thread_from_ravenscar_task (saved_ptid); |
d6ca69cd | 499 | result = beneath ()->stopped_by_watchpoint (); |
e02544b2 JB |
500 | inferior_ptid = saved_ptid; |
501 | return result; | |
502 | } | |
503 | ||
504 | /* Implement the to_stopped_data_address target_ops "method". */ | |
505 | ||
57810aa7 | 506 | bool |
f6ac5f3d | 507 | ravenscar_thread_target::stopped_data_address (CORE_ADDR *addr_p) |
e02544b2 JB |
508 | { |
509 | ptid_t saved_ptid = inferior_ptid; | |
57810aa7 | 510 | bool result; |
e02544b2 | 511 | |
9edcc12f | 512 | inferior_ptid = get_base_thread_from_ravenscar_task (saved_ptid); |
d6ca69cd | 513 | result = beneath ()->stopped_data_address (addr_p); |
e02544b2 JB |
514 | inferior_ptid = saved_ptid; |
515 | return result; | |
516 | } | |
517 | ||
f6ac5f3d PA |
518 | void |
519 | ravenscar_thread_target::mourn_inferior () | |
036b1ba8 | 520 | { |
036b1ba8 | 521 | base_ptid = null_ptid; |
d6ca69cd | 522 | beneath ()->mourn_inferior (); |
036b1ba8 JB |
523 | unpush_target (&ravenscar_ops); |
524 | } | |
525 | ||
e02544b2 JB |
526 | /* Implement the to_core_of_thread target_ops "method". */ |
527 | ||
f6ac5f3d PA |
528 | int |
529 | ravenscar_thread_target::core_of_thread (ptid_t ptid) | |
e02544b2 JB |
530 | { |
531 | ptid_t saved_ptid = inferior_ptid; | |
e02544b2 JB |
532 | int result; |
533 | ||
9edcc12f | 534 | inferior_ptid = get_base_thread_from_ravenscar_task (saved_ptid); |
d6ca69cd | 535 | result = beneath ()->core_of_thread (inferior_ptid); |
e02544b2 JB |
536 | inferior_ptid = saved_ptid; |
537 | return result; | |
538 | } | |
539 | ||
036b1ba8 JB |
540 | /* Observer on inferior_created: push ravenscar thread stratum if needed. */ |
541 | ||
542 | static void | |
543 | ravenscar_inferior_created (struct target_ops *target, int from_tty) | |
544 | { | |
cf3fbed4 | 545 | const char *err_msg; |
7e35103a JB |
546 | |
547 | if (!ravenscar_task_support | |
7dc7c195 | 548 | || gdbarch_ravenscar_ops (target_gdbarch ()) == NULL |
7e35103a | 549 | || !has_ravenscar_runtime ()) |
25abf4de JB |
550 | return; |
551 | ||
cf3fbed4 JB |
552 | err_msg = ada_get_tcb_types_info (); |
553 | if (err_msg != NULL) | |
554 | { | |
8f6cb6c3 | 555 | warning (_("%s. Task/thread support disabled."), err_msg); |
cf3fbed4 JB |
556 | return; |
557 | } | |
558 | ||
25abf4de JB |
559 | ravenscar_update_inferior_ptid (); |
560 | push_target (&ravenscar_ops); | |
036b1ba8 JB |
561 | } |
562 | ||
f6ac5f3d PA |
563 | ptid_t |
564 | ravenscar_thread_target::get_ada_task_ptid (long lwp, long thread) | |
036b1ba8 | 565 | { |
e99b03dc | 566 | return ptid_t (base_ptid.pid (), 0, thread); |
036b1ba8 JB |
567 | } |
568 | ||
036b1ba8 JB |
569 | /* Command-list for the "set/show ravenscar" prefix command. */ |
570 | static struct cmd_list_element *set_ravenscar_list; | |
571 | static struct cmd_list_element *show_ravenscar_list; | |
572 | ||
573 | /* Implement the "set ravenscar" prefix command. */ | |
574 | ||
575 | static void | |
981a3fb3 | 576 | set_ravenscar_command (const char *arg, int from_tty) |
036b1ba8 JB |
577 | { |
578 | printf_unfiltered (_(\ | |
579 | "\"set ravenscar\" must be followed by the name of a setting.\n")); | |
635c7e8a | 580 | help_list (set_ravenscar_list, "set ravenscar ", all_commands, gdb_stdout); |
036b1ba8 JB |
581 | } |
582 | ||
583 | /* Implement the "show ravenscar" prefix command. */ | |
584 | ||
585 | static void | |
981a3fb3 | 586 | show_ravenscar_command (const char *args, int from_tty) |
036b1ba8 JB |
587 | { |
588 | cmd_show_list (show_ravenscar_list, from_tty, ""); | |
589 | } | |
590 | ||
591 | /* Implement the "show ravenscar task-switching" command. */ | |
592 | ||
593 | static void | |
594 | show_ravenscar_task_switching_command (struct ui_file *file, int from_tty, | |
595 | struct cmd_list_element *c, | |
596 | const char *value) | |
597 | { | |
598 | if (ravenscar_task_support) | |
599 | fprintf_filtered (file, _("\ | |
b64edec4 | 600 | Support for Ravenscar task/thread switching is enabled\n")); |
036b1ba8 JB |
601 | else |
602 | fprintf_filtered (file, _("\ | |
b64edec4 | 603 | Support for Ravenscar task/thread switching is disabled\n")); |
036b1ba8 JB |
604 | } |
605 | ||
606 | /* Module startup initialization function, automagically called by | |
607 | init.c. */ | |
608 | ||
609 | void | |
610 | _initialize_ravenscar (void) | |
611 | { | |
036b1ba8 JB |
612 | base_ptid = null_ptid; |
613 | ||
614 | /* Notice when the inferior is created in order to push the | |
615 | ravenscar ops if needed. */ | |
76727919 | 616 | gdb::observers::inferior_created.attach (ravenscar_inferior_created); |
036b1ba8 | 617 | |
036b1ba8 JB |
618 | add_prefix_cmd ("ravenscar", no_class, set_ravenscar_command, |
619 | _("Prefix command for changing Ravenscar-specific settings"), | |
620 | &set_ravenscar_list, "set ravenscar ", 0, &setlist); | |
621 | ||
622 | add_prefix_cmd ("ravenscar", no_class, show_ravenscar_command, | |
623 | _("Prefix command for showing Ravenscar-specific settings"), | |
04f9d4d0 | 624 | &show_ravenscar_list, "show ravenscar ", 0, &showlist); |
036b1ba8 JB |
625 | |
626 | add_setshow_boolean_cmd ("task-switching", class_obscure, | |
627 | &ravenscar_task_support, _("\ | |
628 | Enable or disable support for GNAT Ravenscar tasks"), _("\ | |
629 | Show whether support for GNAT Ravenscar tasks is enabled"), | |
630 | _("\ | |
631 | Enable or disable support for task/thread switching with the GNAT\n\ | |
632 | Ravenscar run-time library for bareboard configuration."), | |
633 | NULL, show_ravenscar_task_switching_command, | |
634 | &set_ravenscar_list, &show_ravenscar_list); | |
635 | } |