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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 | { | |
84 | ravenscar_thread_target () | |
85 | { to_stratum = thread_stratum; } | |
86 | ||
d9f719f1 PA |
87 | const target_info &info () const override |
88 | { return ravenscar_target_info; } | |
f6ac5f3d PA |
89 | |
90 | ptid_t wait (ptid_t, struct target_waitstatus *, int) override; | |
91 | void resume (ptid_t, int, enum gdb_signal) override; | |
92 | ||
93 | void fetch_registers (struct regcache *, int) override; | |
94 | void store_registers (struct regcache *, int) override; | |
95 | ||
96 | void prepare_to_store (struct regcache *) override; | |
97 | ||
57810aa7 | 98 | bool stopped_by_sw_breakpoint () override; |
f6ac5f3d | 99 | |
57810aa7 | 100 | bool stopped_by_hw_breakpoint () override; |
f6ac5f3d | 101 | |
57810aa7 | 102 | bool stopped_by_watchpoint () override; |
f6ac5f3d | 103 | |
57810aa7 | 104 | bool stopped_data_address (CORE_ADDR *) override; |
f6ac5f3d | 105 | |
57810aa7 | 106 | bool thread_alive (ptid_t ptid) override; |
f6ac5f3d PA |
107 | |
108 | int core_of_thread (ptid_t ptid) override; | |
109 | ||
110 | void update_thread_list () override; | |
111 | ||
112 | const char *extra_thread_info (struct thread_info *) override; | |
113 | ||
114 | const char *pid_to_str (ptid_t) override; | |
115 | ||
116 | ptid_t get_ada_task_ptid (long lwp, long thread) override; | |
117 | ||
118 | void mourn_inferior () override; | |
f6ac5f3d PA |
119 | }; |
120 | ||
121 | /* This module's target-specific operations. */ | |
122 | static ravenscar_thread_target ravenscar_ops; | |
123 | ||
9edcc12f | 124 | static ptid_t ravenscar_active_task (int cpu); |
036b1ba8 JB |
125 | static void ravenscar_update_inferior_ptid (void); |
126 | static int has_ravenscar_runtime (void); | |
127 | static int ravenscar_runtime_initialized (void); | |
128 | static void ravenscar_inferior_created (struct target_ops *target, | |
129 | int from_tty); | |
130 | ||
9edcc12f JB |
131 | /* Return nonzero iff PTID corresponds to a ravenscar task. */ |
132 | ||
133 | static int | |
134 | is_ravenscar_task (ptid_t ptid) | |
135 | { | |
54aa6c67 JB |
136 | /* By construction, ravenscar tasks have their LWP set to zero. |
137 | Also make sure that the TID is nonzero, as some remotes, when | |
138 | asked for the list of threads, will return the first thread | |
139 | as having its TID set to zero. For instance, TSIM version | |
140 | 2.0.48 for LEON3 sends 'm0' as a reply to the 'qfThreadInfo' | |
141 | query, which the remote protocol layer then treats as a thread | |
142 | whose TID is 0. This is obviously not a ravenscar task. */ | |
cc6bcb54 | 143 | return ptid.lwp () == 0 && ptid.tid () != 0; |
9edcc12f JB |
144 | } |
145 | ||
146 | /* Given PTID, which can be either a ravenscar task or a CPU thread, | |
147 | return which CPU that ptid is running on. | |
148 | ||
149 | This assume that PTID is a valid ptid_t. Otherwise, a gdb_assert | |
150 | will be triggered. */ | |
151 | ||
152 | static int | |
153 | ravenscar_get_thread_base_cpu (ptid_t ptid) | |
154 | { | |
155 | int base_cpu; | |
156 | ||
157 | if (is_ravenscar_task (ptid)) | |
158 | { | |
159 | struct ada_task_info *task_info = ada_get_task_info_from_ptid (ptid); | |
160 | ||
161 | gdb_assert (task_info != NULL); | |
162 | base_cpu = task_info->base_cpu; | |
163 | } | |
164 | else | |
165 | { | |
166 | /* We assume that the LWP of the PTID is equal to the CPU number. */ | |
e38504b3 | 167 | base_cpu = ptid.lwp (); |
9edcc12f JB |
168 | } |
169 | ||
170 | return base_cpu; | |
171 | } | |
172 | ||
173 | /* Given a ravenscar task (identified by its ptid_t PTID), return nonzero | |
174 | if this task is the currently active task on the cpu that task is | |
175 | running on. | |
176 | ||
177 | In other words, this function determine which CPU this task is | |
178 | currently running on, and then return nonzero if the CPU in question | |
179 | is executing the code for that task. If that's the case, then | |
180 | that task's registers are in the CPU bank. Otherwise, the task | |
181 | is currently suspended, and its registers have been saved in memory. */ | |
182 | ||
183 | static int | |
184 | ravenscar_task_is_currently_active (ptid_t ptid) | |
185 | { | |
186 | ptid_t active_task_ptid | |
187 | = ravenscar_active_task (ravenscar_get_thread_base_cpu (ptid)); | |
188 | ||
d7e15655 | 189 | return ptid == active_task_ptid; |
9edcc12f JB |
190 | } |
191 | ||
192 | /* Return the CPU thread (as a ptid_t) on which the given ravenscar | |
193 | task is running. | |
194 | ||
195 | This is the thread that corresponds to the CPU on which the task | |
196 | is running. */ | |
197 | ||
198 | static ptid_t | |
199 | get_base_thread_from_ravenscar_task (ptid_t ptid) | |
200 | { | |
201 | int base_cpu; | |
202 | ||
203 | if (!is_ravenscar_task (ptid)) | |
204 | return ptid; | |
205 | ||
206 | base_cpu = ravenscar_get_thread_base_cpu (ptid); | |
e99b03dc | 207 | return ptid_t (ptid.pid (), base_cpu, 0); |
9edcc12f JB |
208 | } |
209 | ||
036b1ba8 JB |
210 | /* Fetch the ravenscar running thread from target memory and |
211 | update inferior_ptid accordingly. */ | |
212 | ||
213 | static void | |
214 | ravenscar_update_inferior_ptid (void) | |
215 | { | |
9edcc12f JB |
216 | int base_cpu; |
217 | ||
036b1ba8 JB |
218 | base_ptid = inferior_ptid; |
219 | ||
9edcc12f JB |
220 | gdb_assert (!is_ravenscar_task (inferior_ptid)); |
221 | base_cpu = ravenscar_get_thread_base_cpu (base_ptid); | |
222 | ||
036b1ba8 JB |
223 | /* If the runtime has not been initialized yet, the inferior_ptid is |
224 | the only ptid that there is. */ | |
225 | if (!ravenscar_runtime_initialized ()) | |
226 | return; | |
227 | ||
9edcc12f | 228 | /* Make sure we set base_ptid before calling ravenscar_active_task |
036b1ba8 | 229 | as the latter relies on it. */ |
9edcc12f | 230 | inferior_ptid = ravenscar_active_task (base_cpu); |
d7e15655 | 231 | gdb_assert (inferior_ptid != null_ptid); |
036b1ba8 JB |
232 | |
233 | /* The running thread may not have been added to | |
e8032dde | 234 | system.tasking.debug's list yet; so ravenscar_update_thread_list |
036b1ba8 JB |
235 | may not always add it to the thread list. Add it here. */ |
236 | if (!find_thread_ptid (inferior_ptid)) | |
237 | add_thread (inferior_ptid); | |
238 | } | |
239 | ||
7f39f34a JB |
240 | /* The Ravenscar Runtime exports a symbol which contains the ID of |
241 | the thread that is currently running. Try to locate that symbol | |
242 | and return its associated minimal symbol. | |
243 | Return NULL if not found. */ | |
244 | ||
3b7344d5 | 245 | static struct bound_minimal_symbol |
7f39f34a JB |
246 | get_running_thread_msymbol (void) |
247 | { | |
3b7344d5 | 248 | struct bound_minimal_symbol msym; |
7f39f34a JB |
249 | |
250 | msym = lookup_minimal_symbol (running_thread_name, NULL, NULL); | |
3b7344d5 | 251 | if (!msym.minsym) |
7f39f34a JB |
252 | /* Older versions of the GNAT runtime were using a different |
253 | (less ideal) name for the symbol where the active thread ID | |
254 | is stored. If we couldn't find the symbol using the latest | |
255 | name, then try the old one. */ | |
256 | msym = lookup_minimal_symbol ("running_thread", NULL, NULL); | |
257 | ||
258 | return msym; | |
259 | } | |
260 | ||
036b1ba8 JB |
261 | /* Return True if the Ada Ravenscar run-time can be found in the |
262 | application. */ | |
263 | ||
264 | static int | |
265 | has_ravenscar_runtime (void) | |
266 | { | |
3b7344d5 | 267 | struct bound_minimal_symbol msym_ravenscar_runtime_initializer = |
036b1ba8 | 268 | lookup_minimal_symbol (ravenscar_runtime_initializer, NULL, NULL); |
3b7344d5 | 269 | struct bound_minimal_symbol msym_known_tasks = |
036b1ba8 | 270 | lookup_minimal_symbol (known_tasks_name, NULL, NULL); |
3b7344d5 | 271 | struct bound_minimal_symbol msym_first_task = |
6040a59d | 272 | lookup_minimal_symbol (first_task_name, NULL, NULL); |
3b7344d5 TT |
273 | struct bound_minimal_symbol msym_running_thread |
274 | = get_running_thread_msymbol (); | |
036b1ba8 | 275 | |
3b7344d5 TT |
276 | return (msym_ravenscar_runtime_initializer.minsym |
277 | && (msym_known_tasks.minsym || msym_first_task.minsym) | |
278 | && msym_running_thread.minsym); | |
036b1ba8 JB |
279 | } |
280 | ||
281 | /* Return True if the Ada Ravenscar run-time can be found in the | |
282 | application, and if it has been initialized on target. */ | |
283 | ||
284 | static int | |
285 | ravenscar_runtime_initialized (void) | |
286 | { | |
d7e15655 | 287 | return (!(ravenscar_active_task (1) == null_ptid)); |
036b1ba8 JB |
288 | } |
289 | ||
7f39f34a JB |
290 | /* Return the ID of the thread that is currently running. |
291 | Return 0 if the ID could not be determined. */ | |
036b1ba8 JB |
292 | |
293 | static CORE_ADDR | |
9edcc12f | 294 | get_running_thread_id (int cpu) |
036b1ba8 | 295 | { |
3b7344d5 | 296 | struct bound_minimal_symbol object_msym = get_running_thread_msymbol (); |
036b1ba8 JB |
297 | int object_size; |
298 | int buf_size; | |
948f8e3d | 299 | gdb_byte *buf; |
036b1ba8 JB |
300 | CORE_ADDR object_addr; |
301 | struct type *builtin_type_void_data_ptr = | |
f5656ead | 302 | builtin_type (target_gdbarch ())->builtin_data_ptr; |
036b1ba8 | 303 | |
3b7344d5 | 304 | if (!object_msym.minsym) |
036b1ba8 JB |
305 | return 0; |
306 | ||
036b1ba8 | 307 | object_size = TYPE_LENGTH (builtin_type_void_data_ptr); |
9edcc12f JB |
308 | object_addr = (BMSYMBOL_VALUE_ADDRESS (object_msym) |
309 | + (cpu - 1) * object_size); | |
036b1ba8 | 310 | buf_size = object_size; |
224c3ddb | 311 | buf = (gdb_byte *) alloca (buf_size); |
036b1ba8 JB |
312 | read_memory (object_addr, buf, buf_size); |
313 | return extract_typed_address (buf, builtin_type_void_data_ptr); | |
314 | } | |
315 | ||
f6ac5f3d PA |
316 | void |
317 | ravenscar_thread_target::resume (ptid_t ptid, int step, enum gdb_signal siggnal) | |
036b1ba8 | 318 | { |
036b1ba8 | 319 | inferior_ptid = base_ptid; |
d6ca69cd | 320 | beneath ()->resume (base_ptid, step, siggnal); |
036b1ba8 JB |
321 | } |
322 | ||
f6ac5f3d PA |
323 | ptid_t |
324 | ravenscar_thread_target::wait (ptid_t ptid, | |
325 | struct target_waitstatus *status, | |
326 | int options) | |
036b1ba8 | 327 | { |
3b1b69bf | 328 | ptid_t event_ptid; |
036b1ba8 JB |
329 | |
330 | inferior_ptid = base_ptid; | |
d6ca69cd | 331 | event_ptid = beneath ()->wait (base_ptid, status, 0); |
bed0c243 JB |
332 | /* Find any new threads that might have been created, and update |
333 | inferior_ptid to the active thread. | |
334 | ||
335 | Only do it if the program is still alive, though. Otherwise, | |
336 | this causes problems when debugging through the remote protocol, | |
337 | because we might try switching threads (and thus sending packets) | |
338 | after the remote has disconnected. */ | |
339 | if (status->kind != TARGET_WAITKIND_EXITED | |
340 | && status->kind != TARGET_WAITKIND_SIGNALLED) | |
341 | { | |
3b1b69bf | 342 | inferior_ptid = event_ptid; |
f6ac5f3d | 343 | this->update_thread_list (); |
bed0c243 JB |
344 | ravenscar_update_inferior_ptid (); |
345 | } | |
036b1ba8 JB |
346 | return inferior_ptid; |
347 | } | |
348 | ||
349 | /* Add the thread associated to the given TASK to the thread list | |
350 | (if the thread has already been added, this is a no-op). */ | |
351 | ||
352 | static void | |
353 | ravenscar_add_thread (struct ada_task_info *task) | |
354 | { | |
355 | if (find_thread_ptid (task->ptid) == NULL) | |
356 | add_thread (task->ptid); | |
357 | } | |
358 | ||
f6ac5f3d PA |
359 | void |
360 | ravenscar_thread_target::update_thread_list () | |
036b1ba8 | 361 | { |
79779fa9 | 362 | ada_build_task_list (); |
036b1ba8 JB |
363 | |
364 | /* Do not clear the thread list before adding the Ada task, to keep | |
365 | the thread that the process stratum has included into it | |
366 | (base_ptid) and the running thread, that may not have been included | |
367 | to system.tasking.debug's list yet. */ | |
368 | ||
369 | iterate_over_live_ada_tasks (ravenscar_add_thread); | |
370 | } | |
371 | ||
372 | static ptid_t | |
9edcc12f | 373 | ravenscar_active_task (int cpu) |
036b1ba8 | 374 | { |
9edcc12f | 375 | CORE_ADDR tid = get_running_thread_id (cpu); |
036b1ba8 JB |
376 | |
377 | if (tid == 0) | |
378 | return null_ptid; | |
379 | else | |
e99b03dc | 380 | return ptid_t (base_ptid.pid (), 0, tid); |
036b1ba8 JB |
381 | } |
382 | ||
f6ac5f3d PA |
383 | const char * |
384 | ravenscar_thread_target::extra_thread_info (thread_info *tp) | |
036b1ba8 JB |
385 | { |
386 | return "Ravenscar task"; | |
387 | } | |
388 | ||
57810aa7 | 389 | bool |
f6ac5f3d | 390 | ravenscar_thread_target::thread_alive (ptid_t ptid) |
036b1ba8 JB |
391 | { |
392 | /* Ravenscar tasks are non-terminating. */ | |
57810aa7 | 393 | return true; |
036b1ba8 JB |
394 | } |
395 | ||
f6ac5f3d PA |
396 | const char * |
397 | ravenscar_thread_target::pid_to_str (ptid_t ptid) | |
036b1ba8 JB |
398 | { |
399 | static char buf[30]; | |
400 | ||
cc6bcb54 | 401 | snprintf (buf, sizeof (buf), "Thread %#x", (int) ptid.tid ()); |
036b1ba8 JB |
402 | return buf; |
403 | } | |
404 | ||
f6ac5f3d PA |
405 | void |
406 | ravenscar_thread_target::fetch_registers (struct regcache *regcache, int regnum) | |
036b1ba8 | 407 | { |
222312d3 | 408 | ptid_t ptid = regcache->ptid (); |
036b1ba8 | 409 | |
9edcc12f JB |
410 | if (ravenscar_runtime_initialized () |
411 | && is_ravenscar_task (ptid) | |
412 | && !ravenscar_task_is_currently_active (ptid)) | |
7e35103a | 413 | { |
ac7936df | 414 | struct gdbarch *gdbarch = regcache->arch (); |
7e35103a JB |
415 | struct ravenscar_arch_ops *arch_ops |
416 | = gdbarch_ravenscar_ops (gdbarch); | |
417 | ||
418 | arch_ops->to_fetch_registers (regcache, regnum); | |
419 | } | |
9edcc12f | 420 | else |
d6ca69cd | 421 | beneath ()->fetch_registers (regcache, regnum); |
036b1ba8 JB |
422 | } |
423 | ||
f6ac5f3d PA |
424 | void |
425 | ravenscar_thread_target::store_registers (struct regcache *regcache, | |
426 | int regnum) | |
036b1ba8 | 427 | { |
222312d3 | 428 | ptid_t ptid = regcache->ptid (); |
036b1ba8 | 429 | |
9edcc12f JB |
430 | if (ravenscar_runtime_initialized () |
431 | && is_ravenscar_task (ptid) | |
432 | && !ravenscar_task_is_currently_active (ptid)) | |
7e35103a | 433 | { |
ac7936df | 434 | struct gdbarch *gdbarch = regcache->arch (); |
7e35103a JB |
435 | struct ravenscar_arch_ops *arch_ops |
436 | = gdbarch_ravenscar_ops (gdbarch); | |
437 | ||
494f80a9 | 438 | arch_ops->to_store_registers (regcache, regnum); |
7e35103a | 439 | } |
9edcc12f | 440 | else |
d6ca69cd | 441 | beneath ()->store_registers (regcache, regnum); |
036b1ba8 JB |
442 | } |
443 | ||
f6ac5f3d PA |
444 | void |
445 | ravenscar_thread_target::prepare_to_store (struct regcache *regcache) | |
036b1ba8 | 446 | { |
222312d3 | 447 | ptid_t ptid = regcache->ptid (); |
036b1ba8 | 448 | |
9edcc12f JB |
449 | if (ravenscar_runtime_initialized () |
450 | && is_ravenscar_task (ptid) | |
451 | && !ravenscar_task_is_currently_active (ptid)) | |
7e35103a | 452 | { |
ac7936df | 453 | struct gdbarch *gdbarch = regcache->arch (); |
7e35103a JB |
454 | struct ravenscar_arch_ops *arch_ops |
455 | = gdbarch_ravenscar_ops (gdbarch); | |
456 | ||
494f80a9 | 457 | arch_ops->to_prepare_to_store (regcache); |
7e35103a | 458 | } |
9edcc12f | 459 | else |
d6ca69cd | 460 | beneath ()->prepare_to_store (regcache); |
036b1ba8 JB |
461 | } |
462 | ||
e02544b2 JB |
463 | /* Implement the to_stopped_by_sw_breakpoint target_ops "method". */ |
464 | ||
57810aa7 | 465 | bool |
f6ac5f3d | 466 | ravenscar_thread_target::stopped_by_sw_breakpoint () |
e02544b2 JB |
467 | { |
468 | ptid_t saved_ptid = inferior_ptid; | |
57810aa7 | 469 | bool result; |
e02544b2 | 470 | |
9edcc12f | 471 | inferior_ptid = get_base_thread_from_ravenscar_task (saved_ptid); |
d6ca69cd | 472 | result = beneath ()->stopped_by_sw_breakpoint (); |
e02544b2 JB |
473 | inferior_ptid = saved_ptid; |
474 | return result; | |
475 | } | |
476 | ||
477 | /* Implement the to_stopped_by_hw_breakpoint target_ops "method". */ | |
478 | ||
57810aa7 | 479 | bool |
f6ac5f3d | 480 | ravenscar_thread_target::stopped_by_hw_breakpoint () |
e02544b2 JB |
481 | { |
482 | ptid_t saved_ptid = inferior_ptid; | |
57810aa7 | 483 | bool result; |
e02544b2 | 484 | |
9edcc12f | 485 | inferior_ptid = get_base_thread_from_ravenscar_task (saved_ptid); |
d6ca69cd | 486 | result = beneath ()->stopped_by_hw_breakpoint (); |
e02544b2 JB |
487 | inferior_ptid = saved_ptid; |
488 | return result; | |
489 | } | |
490 | ||
491 | /* Implement the to_stopped_by_watchpoint target_ops "method". */ | |
492 | ||
57810aa7 | 493 | bool |
f6ac5f3d | 494 | ravenscar_thread_target::stopped_by_watchpoint () |
e02544b2 JB |
495 | { |
496 | ptid_t saved_ptid = inferior_ptid; | |
57810aa7 | 497 | bool result; |
e02544b2 | 498 | |
9edcc12f | 499 | inferior_ptid = get_base_thread_from_ravenscar_task (saved_ptid); |
d6ca69cd | 500 | result = beneath ()->stopped_by_watchpoint (); |
e02544b2 JB |
501 | inferior_ptid = saved_ptid; |
502 | return result; | |
503 | } | |
504 | ||
505 | /* Implement the to_stopped_data_address target_ops "method". */ | |
506 | ||
57810aa7 | 507 | bool |
f6ac5f3d | 508 | ravenscar_thread_target::stopped_data_address (CORE_ADDR *addr_p) |
e02544b2 JB |
509 | { |
510 | ptid_t saved_ptid = inferior_ptid; | |
57810aa7 | 511 | bool result; |
e02544b2 | 512 | |
9edcc12f | 513 | inferior_ptid = get_base_thread_from_ravenscar_task (saved_ptid); |
d6ca69cd | 514 | result = beneath ()->stopped_data_address (addr_p); |
e02544b2 JB |
515 | inferior_ptid = saved_ptid; |
516 | return result; | |
517 | } | |
518 | ||
f6ac5f3d PA |
519 | void |
520 | ravenscar_thread_target::mourn_inferior () | |
036b1ba8 | 521 | { |
036b1ba8 | 522 | base_ptid = null_ptid; |
d6ca69cd | 523 | beneath ()->mourn_inferior (); |
036b1ba8 JB |
524 | unpush_target (&ravenscar_ops); |
525 | } | |
526 | ||
e02544b2 JB |
527 | /* Implement the to_core_of_thread target_ops "method". */ |
528 | ||
f6ac5f3d PA |
529 | int |
530 | ravenscar_thread_target::core_of_thread (ptid_t ptid) | |
e02544b2 JB |
531 | { |
532 | ptid_t saved_ptid = inferior_ptid; | |
e02544b2 JB |
533 | int result; |
534 | ||
9edcc12f | 535 | inferior_ptid = get_base_thread_from_ravenscar_task (saved_ptid); |
d6ca69cd | 536 | result = beneath ()->core_of_thread (inferior_ptid); |
e02544b2 JB |
537 | inferior_ptid = saved_ptid; |
538 | return result; | |
539 | } | |
540 | ||
036b1ba8 JB |
541 | /* Observer on inferior_created: push ravenscar thread stratum if needed. */ |
542 | ||
543 | static void | |
544 | ravenscar_inferior_created (struct target_ops *target, int from_tty) | |
545 | { | |
cf3fbed4 | 546 | const char *err_msg; |
7e35103a JB |
547 | |
548 | if (!ravenscar_task_support | |
7dc7c195 | 549 | || gdbarch_ravenscar_ops (target_gdbarch ()) == NULL |
7e35103a | 550 | || !has_ravenscar_runtime ()) |
25abf4de JB |
551 | return; |
552 | ||
cf3fbed4 JB |
553 | err_msg = ada_get_tcb_types_info (); |
554 | if (err_msg != NULL) | |
555 | { | |
8f6cb6c3 | 556 | warning (_("%s. Task/thread support disabled."), err_msg); |
cf3fbed4 JB |
557 | return; |
558 | } | |
559 | ||
25abf4de JB |
560 | ravenscar_update_inferior_ptid (); |
561 | push_target (&ravenscar_ops); | |
036b1ba8 JB |
562 | } |
563 | ||
f6ac5f3d PA |
564 | ptid_t |
565 | ravenscar_thread_target::get_ada_task_ptid (long lwp, long thread) | |
036b1ba8 | 566 | { |
e99b03dc | 567 | return ptid_t (base_ptid.pid (), 0, thread); |
036b1ba8 JB |
568 | } |
569 | ||
036b1ba8 JB |
570 | /* Command-list for the "set/show ravenscar" prefix command. */ |
571 | static struct cmd_list_element *set_ravenscar_list; | |
572 | static struct cmd_list_element *show_ravenscar_list; | |
573 | ||
574 | /* Implement the "set ravenscar" prefix command. */ | |
575 | ||
576 | static void | |
981a3fb3 | 577 | set_ravenscar_command (const char *arg, int from_tty) |
036b1ba8 JB |
578 | { |
579 | printf_unfiltered (_(\ | |
580 | "\"set ravenscar\" must be followed by the name of a setting.\n")); | |
635c7e8a | 581 | help_list (set_ravenscar_list, "set ravenscar ", all_commands, gdb_stdout); |
036b1ba8 JB |
582 | } |
583 | ||
584 | /* Implement the "show ravenscar" prefix command. */ | |
585 | ||
586 | static void | |
981a3fb3 | 587 | show_ravenscar_command (const char *args, int from_tty) |
036b1ba8 JB |
588 | { |
589 | cmd_show_list (show_ravenscar_list, from_tty, ""); | |
590 | } | |
591 | ||
592 | /* Implement the "show ravenscar task-switching" command. */ | |
593 | ||
594 | static void | |
595 | show_ravenscar_task_switching_command (struct ui_file *file, int from_tty, | |
596 | struct cmd_list_element *c, | |
597 | const char *value) | |
598 | { | |
599 | if (ravenscar_task_support) | |
600 | fprintf_filtered (file, _("\ | |
b64edec4 | 601 | Support for Ravenscar task/thread switching is enabled\n")); |
036b1ba8 JB |
602 | else |
603 | fprintf_filtered (file, _("\ | |
b64edec4 | 604 | Support for Ravenscar task/thread switching is disabled\n")); |
036b1ba8 JB |
605 | } |
606 | ||
607 | /* Module startup initialization function, automagically called by | |
608 | init.c. */ | |
609 | ||
610 | void | |
611 | _initialize_ravenscar (void) | |
612 | { | |
036b1ba8 JB |
613 | base_ptid = null_ptid; |
614 | ||
615 | /* Notice when the inferior is created in order to push the | |
616 | ravenscar ops if needed. */ | |
76727919 | 617 | gdb::observers::inferior_created.attach (ravenscar_inferior_created); |
036b1ba8 | 618 | |
036b1ba8 JB |
619 | add_prefix_cmd ("ravenscar", no_class, set_ravenscar_command, |
620 | _("Prefix command for changing Ravenscar-specific settings"), | |
621 | &set_ravenscar_list, "set ravenscar ", 0, &setlist); | |
622 | ||
623 | add_prefix_cmd ("ravenscar", no_class, show_ravenscar_command, | |
624 | _("Prefix command for showing Ravenscar-specific settings"), | |
04f9d4d0 | 625 | &show_ravenscar_list, "show ravenscar ", 0, &showlist); |
036b1ba8 JB |
626 | |
627 | add_setshow_boolean_cmd ("task-switching", class_obscure, | |
628 | &ravenscar_task_support, _("\ | |
629 | Enable or disable support for GNAT Ravenscar tasks"), _("\ | |
630 | Show whether support for GNAT Ravenscar tasks is enabled"), | |
631 | _("\ | |
632 | Enable or disable support for task/thread switching with the GNAT\n\ | |
633 | Ravenscar run-time library for bareboard configuration."), | |
634 | NULL, show_ravenscar_task_switching_command, | |
635 | &set_ravenscar_list, &show_ravenscar_list); | |
636 | } |