Commit | Line | Data |
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036b1ba8 JB |
1 | /* Ada Ravenscar thread support. |
2 | ||
b811d2c2 | 3 | Copyright (C) 2004-2020 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 | |
e397fd39 | 39 | about high-level concepts such as threads, only about some code |
9edcc12f JB |
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 | |
e397fd39 | 47 | on the list of Ada tasks, with one thread per Ada task. The convention |
9edcc12f | 48 | is that threads corresponding to the CPUs (see assumption above) |
e397fd39 | 49 | have a ptid_t of the form (PID, LWP, 0), while threads corresponding |
9edcc12f JB |
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 | ||
e397fd39 TT |
53 | Switching to a given Ada task (or its underlying thread) is performed |
54 | by fetching the registers of that task from the memory area where | |
9edcc12f JB |
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 | ||
491144b5 CB |
60 | /* If true, ravenscar task support is enabled. */ |
61 | static bool ravenscar_task_support = true; | |
036b1ba8 | 62 | |
7f39f34a | 63 | static const char running_thread_name[] = "__gnat_running_thread_table"; |
036b1ba8 JB |
64 | |
65 | static const char known_tasks_name[] = "system__tasking__debug__known_tasks"; | |
6040a59d | 66 | static const char first_task_name[] = "system__tasking__debug__first_task"; |
036b1ba8 | 67 | |
6cbcc006 TT |
68 | static const char ravenscar_runtime_initializer[] |
69 | = "system__bb__threads__initialize"; | |
036b1ba8 | 70 | |
d9f719f1 PA |
71 | static const target_info ravenscar_target_info = { |
72 | "ravenscar", | |
73 | N_("Ravenscar tasks."), | |
74 | N_("Ravenscar tasks support.") | |
75 | }; | |
76 | ||
f6ac5f3d PA |
77 | struct ravenscar_thread_target final : public target_ops |
78 | { | |
0b790b1e | 79 | ravenscar_thread_target () |
2da4b788 | 80 | : m_base_ptid (inferior_ptid) |
0b790b1e | 81 | { |
2da4b788 PA |
82 | thread_info *thr = add_active_thread (); |
83 | if (thr != nullptr) | |
84 | switch_to_thread (thr); | |
0b790b1e TT |
85 | } |
86 | ||
d9f719f1 PA |
87 | const target_info &info () const override |
88 | { return ravenscar_target_info; } | |
f6ac5f3d | 89 | |
66b4deae PA |
90 | strata stratum () const override { return thread_stratum; } |
91 | ||
f6ac5f3d PA |
92 | ptid_t wait (ptid_t, struct target_waitstatus *, int) override; |
93 | void resume (ptid_t, int, enum gdb_signal) override; | |
94 | ||
95 | void fetch_registers (struct regcache *, int) override; | |
96 | void store_registers (struct regcache *, int) override; | |
97 | ||
98 | void prepare_to_store (struct regcache *) override; | |
99 | ||
57810aa7 | 100 | bool stopped_by_sw_breakpoint () override; |
f6ac5f3d | 101 | |
57810aa7 | 102 | bool stopped_by_hw_breakpoint () override; |
f6ac5f3d | 103 | |
57810aa7 | 104 | bool stopped_by_watchpoint () override; |
f6ac5f3d | 105 | |
57810aa7 | 106 | bool stopped_data_address (CORE_ADDR *) override; |
f6ac5f3d | 107 | |
57810aa7 | 108 | bool thread_alive (ptid_t ptid) override; |
f6ac5f3d PA |
109 | |
110 | int core_of_thread (ptid_t ptid) override; | |
111 | ||
112 | void update_thread_list () override; | |
113 | ||
114 | const char *extra_thread_info (struct thread_info *) override; | |
115 | ||
a068643d | 116 | std::string pid_to_str (ptid_t) override; |
f6ac5f3d PA |
117 | |
118 | ptid_t get_ada_task_ptid (long lwp, long thread) override; | |
119 | ||
120 | void mourn_inferior () override; | |
f6ac5f3d | 121 | |
0b790b1e TT |
122 | void close () override |
123 | { | |
124 | delete this; | |
125 | } | |
126 | ||
127 | private: | |
f6ac5f3d | 128 | |
0b790b1e TT |
129 | /* PTID of the last thread that received an event. |
130 | This can be useful to determine the associated task that received | |
131 | the event, to make it the current task. */ | |
2da4b788 | 132 | ptid_t m_base_ptid; |
0b790b1e | 133 | |
2da4b788 | 134 | thread_info *add_active_thread (); |
0b790b1e TT |
135 | ptid_t active_task (int cpu); |
136 | bool task_is_currently_active (ptid_t ptid); | |
137 | bool runtime_initialized (); | |
138 | }; | |
036b1ba8 | 139 | |
989f3c58 | 140 | /* Return true iff PTID corresponds to a ravenscar task. */ |
9edcc12f | 141 | |
989f3c58 | 142 | static bool |
9edcc12f JB |
143 | is_ravenscar_task (ptid_t ptid) |
144 | { | |
54aa6c67 JB |
145 | /* By construction, ravenscar tasks have their LWP set to zero. |
146 | Also make sure that the TID is nonzero, as some remotes, when | |
147 | asked for the list of threads, will return the first thread | |
148 | as having its TID set to zero. For instance, TSIM version | |
149 | 2.0.48 for LEON3 sends 'm0' as a reply to the 'qfThreadInfo' | |
150 | query, which the remote protocol layer then treats as a thread | |
151 | whose TID is 0. This is obviously not a ravenscar task. */ | |
cc6bcb54 | 152 | return ptid.lwp () == 0 && ptid.tid () != 0; |
9edcc12f JB |
153 | } |
154 | ||
155 | /* Given PTID, which can be either a ravenscar task or a CPU thread, | |
156 | return which CPU that ptid is running on. | |
157 | ||
158 | This assume that PTID is a valid ptid_t. Otherwise, a gdb_assert | |
159 | will be triggered. */ | |
160 | ||
161 | static int | |
162 | ravenscar_get_thread_base_cpu (ptid_t ptid) | |
163 | { | |
164 | int base_cpu; | |
165 | ||
166 | if (is_ravenscar_task (ptid)) | |
167 | { | |
168 | struct ada_task_info *task_info = ada_get_task_info_from_ptid (ptid); | |
169 | ||
170 | gdb_assert (task_info != NULL); | |
171 | base_cpu = task_info->base_cpu; | |
172 | } | |
173 | else | |
174 | { | |
175 | /* We assume that the LWP of the PTID is equal to the CPU number. */ | |
e38504b3 | 176 | base_cpu = ptid.lwp (); |
9edcc12f JB |
177 | } |
178 | ||
179 | return base_cpu; | |
180 | } | |
181 | ||
989f3c58 | 182 | /* Given a ravenscar task (identified by its ptid_t PTID), return true |
9edcc12f JB |
183 | if this task is the currently active task on the cpu that task is |
184 | running on. | |
185 | ||
186 | In other words, this function determine which CPU this task is | |
187 | currently running on, and then return nonzero if the CPU in question | |
188 | is executing the code for that task. If that's the case, then | |
189 | that task's registers are in the CPU bank. Otherwise, the task | |
190 | is currently suspended, and its registers have been saved in memory. */ | |
191 | ||
0b790b1e TT |
192 | bool |
193 | ravenscar_thread_target::task_is_currently_active (ptid_t ptid) | |
9edcc12f JB |
194 | { |
195 | ptid_t active_task_ptid | |
0b790b1e | 196 | = active_task (ravenscar_get_thread_base_cpu (ptid)); |
9edcc12f | 197 | |
d7e15655 | 198 | return ptid == active_task_ptid; |
9edcc12f JB |
199 | } |
200 | ||
201 | /* Return the CPU thread (as a ptid_t) on which the given ravenscar | |
202 | task is running. | |
203 | ||
204 | This is the thread that corresponds to the CPU on which the task | |
205 | is running. */ | |
206 | ||
207 | static ptid_t | |
208 | get_base_thread_from_ravenscar_task (ptid_t ptid) | |
209 | { | |
210 | int base_cpu; | |
211 | ||
212 | if (!is_ravenscar_task (ptid)) | |
213 | return ptid; | |
214 | ||
215 | base_cpu = ravenscar_get_thread_base_cpu (ptid); | |
e99b03dc | 216 | return ptid_t (ptid.pid (), base_cpu, 0); |
9edcc12f JB |
217 | } |
218 | ||
2da4b788 PA |
219 | /* Fetch the ravenscar running thread from target memory, make sure |
220 | there's a corresponding thread in the thread list, and return it. | |
221 | If the runtime is not initialized, return NULL. */ | |
036b1ba8 | 222 | |
2da4b788 PA |
223 | thread_info * |
224 | ravenscar_thread_target::add_active_thread () | |
036b1ba8 | 225 | { |
5b6d1e4f PA |
226 | process_stratum_target *proc_target |
227 | = as_process_stratum_target (this->beneath ()); | |
228 | ||
9edcc12f JB |
229 | int base_cpu; |
230 | ||
2da4b788 | 231 | gdb_assert (!is_ravenscar_task (m_base_ptid)); |
0b790b1e | 232 | base_cpu = ravenscar_get_thread_base_cpu (m_base_ptid); |
9edcc12f | 233 | |
0b790b1e | 234 | if (!runtime_initialized ()) |
2da4b788 | 235 | return nullptr; |
036b1ba8 | 236 | |
0b790b1e | 237 | /* Make sure we set m_base_ptid before calling active_task |
036b1ba8 | 238 | as the latter relies on it. */ |
2da4b788 PA |
239 | ptid_t active_ptid = active_task (base_cpu); |
240 | gdb_assert (active_ptid != null_ptid); | |
036b1ba8 JB |
241 | |
242 | /* The running thread may not have been added to | |
e8032dde | 243 | system.tasking.debug's list yet; so ravenscar_update_thread_list |
036b1ba8 | 244 | may not always add it to the thread list. Add it here. */ |
2da4b788 PA |
245 | thread_info *active_thr = find_thread_ptid (proc_target, active_ptid); |
246 | if (active_thr == nullptr) | |
247 | active_thr = add_thread (proc_target, active_ptid); | |
248 | return active_thr; | |
036b1ba8 JB |
249 | } |
250 | ||
7f39f34a JB |
251 | /* The Ravenscar Runtime exports a symbol which contains the ID of |
252 | the thread that is currently running. Try to locate that symbol | |
253 | and return its associated minimal symbol. | |
254 | Return NULL if not found. */ | |
255 | ||
3b7344d5 | 256 | static struct bound_minimal_symbol |
989f3c58 | 257 | get_running_thread_msymbol () |
7f39f34a | 258 | { |
3b7344d5 | 259 | struct bound_minimal_symbol msym; |
7f39f34a JB |
260 | |
261 | msym = lookup_minimal_symbol (running_thread_name, NULL, NULL); | |
3b7344d5 | 262 | if (!msym.minsym) |
7f39f34a JB |
263 | /* Older versions of the GNAT runtime were using a different |
264 | (less ideal) name for the symbol where the active thread ID | |
265 | is stored. If we couldn't find the symbol using the latest | |
266 | name, then try the old one. */ | |
267 | msym = lookup_minimal_symbol ("running_thread", NULL, NULL); | |
268 | ||
269 | return msym; | |
270 | } | |
271 | ||
036b1ba8 JB |
272 | /* Return True if the Ada Ravenscar run-time can be found in the |
273 | application. */ | |
274 | ||
989f3c58 TT |
275 | static bool |
276 | has_ravenscar_runtime () | |
036b1ba8 | 277 | { |
6cbcc006 TT |
278 | struct bound_minimal_symbol msym_ravenscar_runtime_initializer |
279 | = lookup_minimal_symbol (ravenscar_runtime_initializer, NULL, NULL); | |
280 | struct bound_minimal_symbol msym_known_tasks | |
281 | = lookup_minimal_symbol (known_tasks_name, NULL, NULL); | |
282 | struct bound_minimal_symbol msym_first_task | |
283 | = lookup_minimal_symbol (first_task_name, NULL, NULL); | |
3b7344d5 TT |
284 | struct bound_minimal_symbol msym_running_thread |
285 | = get_running_thread_msymbol (); | |
036b1ba8 | 286 | |
3b7344d5 TT |
287 | return (msym_ravenscar_runtime_initializer.minsym |
288 | && (msym_known_tasks.minsym || msym_first_task.minsym) | |
289 | && msym_running_thread.minsym); | |
036b1ba8 JB |
290 | } |
291 | ||
292 | /* Return True if the Ada Ravenscar run-time can be found in the | |
293 | application, and if it has been initialized on target. */ | |
294 | ||
0b790b1e TT |
295 | bool |
296 | ravenscar_thread_target::runtime_initialized () | |
036b1ba8 | 297 | { |
0b790b1e | 298 | return active_task (1) != null_ptid; |
036b1ba8 JB |
299 | } |
300 | ||
7f39f34a JB |
301 | /* Return the ID of the thread that is currently running. |
302 | Return 0 if the ID could not be determined. */ | |
036b1ba8 JB |
303 | |
304 | static CORE_ADDR | |
9edcc12f | 305 | get_running_thread_id (int cpu) |
036b1ba8 | 306 | { |
3b7344d5 | 307 | struct bound_minimal_symbol object_msym = get_running_thread_msymbol (); |
036b1ba8 JB |
308 | int object_size; |
309 | int buf_size; | |
948f8e3d | 310 | gdb_byte *buf; |
036b1ba8 | 311 | CORE_ADDR object_addr; |
6cbcc006 TT |
312 | struct type *builtin_type_void_data_ptr |
313 | = builtin_type (target_gdbarch ())->builtin_data_ptr; | |
036b1ba8 | 314 | |
3b7344d5 | 315 | if (!object_msym.minsym) |
036b1ba8 JB |
316 | return 0; |
317 | ||
036b1ba8 | 318 | object_size = TYPE_LENGTH (builtin_type_void_data_ptr); |
9edcc12f JB |
319 | object_addr = (BMSYMBOL_VALUE_ADDRESS (object_msym) |
320 | + (cpu - 1) * object_size); | |
036b1ba8 | 321 | buf_size = object_size; |
224c3ddb | 322 | buf = (gdb_byte *) alloca (buf_size); |
036b1ba8 JB |
323 | read_memory (object_addr, buf, buf_size); |
324 | return extract_typed_address (buf, builtin_type_void_data_ptr); | |
325 | } | |
326 | ||
f6ac5f3d | 327 | void |
6cbcc006 TT |
328 | ravenscar_thread_target::resume (ptid_t ptid, int step, |
329 | enum gdb_signal siggnal) | |
036b1ba8 | 330 | { |
485b851b TT |
331 | /* If we see a wildcard resume, we simply pass that on. Otherwise, |
332 | arrange to resume the base ptid. */ | |
0b790b1e | 333 | inferior_ptid = m_base_ptid; |
485b851b TT |
334 | if (ptid != minus_one_ptid) |
335 | ptid = m_base_ptid; | |
336 | beneath ()->resume (ptid, step, siggnal); | |
036b1ba8 JB |
337 | } |
338 | ||
f6ac5f3d PA |
339 | ptid_t |
340 | ravenscar_thread_target::wait (ptid_t ptid, | |
341 | struct target_waitstatus *status, | |
342 | int options) | |
036b1ba8 | 343 | { |
5b6d1e4f PA |
344 | process_stratum_target *beneath |
345 | = as_process_stratum_target (this->beneath ()); | |
3b1b69bf | 346 | ptid_t event_ptid; |
036b1ba8 | 347 | |
485b851b TT |
348 | if (ptid != minus_one_ptid) |
349 | ptid = m_base_ptid; | |
5b6d1e4f | 350 | event_ptid = beneath->wait (ptid, status, 0); |
2da4b788 PA |
351 | /* Find any new threads that might have been created, and return the |
352 | active thread. | |
bed0c243 JB |
353 | |
354 | Only do it if the program is still alive, though. Otherwise, | |
355 | this causes problems when debugging through the remote protocol, | |
356 | because we might try switching threads (and thus sending packets) | |
357 | after the remote has disconnected. */ | |
358 | if (status->kind != TARGET_WAITKIND_EXITED | |
359 | && status->kind != TARGET_WAITKIND_SIGNALLED) | |
360 | { | |
2da4b788 | 361 | m_base_ptid = event_ptid; |
f6ac5f3d | 362 | this->update_thread_list (); |
2da4b788 | 363 | return this->add_active_thread ()->ptid; |
bed0c243 | 364 | } |
2da4b788 | 365 | return m_base_ptid; |
036b1ba8 JB |
366 | } |
367 | ||
368 | /* Add the thread associated to the given TASK to the thread list | |
369 | (if the thread has already been added, this is a no-op). */ | |
370 | ||
371 | static void | |
372 | ravenscar_add_thread (struct ada_task_info *task) | |
373 | { | |
5b6d1e4f PA |
374 | if (find_thread_ptid (current_inferior (), task->ptid) == NULL) |
375 | add_thread (current_inferior ()->process_target (), task->ptid); | |
036b1ba8 JB |
376 | } |
377 | ||
f6ac5f3d PA |
378 | void |
379 | ravenscar_thread_target::update_thread_list () | |
036b1ba8 | 380 | { |
036b1ba8 JB |
381 | /* Do not clear the thread list before adding the Ada task, to keep |
382 | the thread that the process stratum has included into it | |
0b790b1e | 383 | (m_base_ptid) and the running thread, that may not have been included |
036b1ba8 JB |
384 | to system.tasking.debug's list yet. */ |
385 | ||
386 | iterate_over_live_ada_tasks (ravenscar_add_thread); | |
387 | } | |
388 | ||
0b790b1e TT |
389 | ptid_t |
390 | ravenscar_thread_target::active_task (int cpu) | |
036b1ba8 | 391 | { |
9edcc12f | 392 | CORE_ADDR tid = get_running_thread_id (cpu); |
036b1ba8 JB |
393 | |
394 | if (tid == 0) | |
395 | return null_ptid; | |
396 | else | |
0b790b1e | 397 | return ptid_t (m_base_ptid.pid (), 0, tid); |
036b1ba8 JB |
398 | } |
399 | ||
f6ac5f3d PA |
400 | const char * |
401 | ravenscar_thread_target::extra_thread_info (thread_info *tp) | |
036b1ba8 JB |
402 | { |
403 | return "Ravenscar task"; | |
404 | } | |
405 | ||
57810aa7 | 406 | bool |
f6ac5f3d | 407 | ravenscar_thread_target::thread_alive (ptid_t ptid) |
036b1ba8 JB |
408 | { |
409 | /* Ravenscar tasks are non-terminating. */ | |
57810aa7 | 410 | return true; |
036b1ba8 JB |
411 | } |
412 | ||
a068643d | 413 | std::string |
f6ac5f3d | 414 | ravenscar_thread_target::pid_to_str (ptid_t ptid) |
036b1ba8 | 415 | { |
a068643d | 416 | return string_printf ("Thread %#x", (int) ptid.tid ()); |
036b1ba8 JB |
417 | } |
418 | ||
f6ac5f3d PA |
419 | void |
420 | ravenscar_thread_target::fetch_registers (struct regcache *regcache, int regnum) | |
036b1ba8 | 421 | { |
222312d3 | 422 | ptid_t ptid = regcache->ptid (); |
036b1ba8 | 423 | |
0b790b1e | 424 | if (runtime_initialized () |
9edcc12f | 425 | && is_ravenscar_task (ptid) |
0b790b1e | 426 | && !task_is_currently_active (ptid)) |
7e35103a | 427 | { |
ac7936df | 428 | struct gdbarch *gdbarch = regcache->arch (); |
7e35103a JB |
429 | struct ravenscar_arch_ops *arch_ops |
430 | = gdbarch_ravenscar_ops (gdbarch); | |
431 | ||
7657f14d | 432 | arch_ops->fetch_registers (regcache, regnum); |
7e35103a | 433 | } |
9edcc12f | 434 | else |
d6ca69cd | 435 | beneath ()->fetch_registers (regcache, regnum); |
036b1ba8 JB |
436 | } |
437 | ||
f6ac5f3d PA |
438 | void |
439 | ravenscar_thread_target::store_registers (struct regcache *regcache, | |
440 | int regnum) | |
036b1ba8 | 441 | { |
222312d3 | 442 | ptid_t ptid = regcache->ptid (); |
036b1ba8 | 443 | |
0b790b1e | 444 | if (runtime_initialized () |
9edcc12f | 445 | && is_ravenscar_task (ptid) |
0b790b1e | 446 | && !task_is_currently_active (ptid)) |
7e35103a | 447 | { |
ac7936df | 448 | struct gdbarch *gdbarch = regcache->arch (); |
7e35103a JB |
449 | struct ravenscar_arch_ops *arch_ops |
450 | = gdbarch_ravenscar_ops (gdbarch); | |
451 | ||
7657f14d | 452 | arch_ops->store_registers (regcache, regnum); |
7e35103a | 453 | } |
9edcc12f | 454 | else |
d6ca69cd | 455 | beneath ()->store_registers (regcache, regnum); |
036b1ba8 JB |
456 | } |
457 | ||
f6ac5f3d PA |
458 | void |
459 | ravenscar_thread_target::prepare_to_store (struct regcache *regcache) | |
036b1ba8 | 460 | { |
222312d3 | 461 | ptid_t ptid = regcache->ptid (); |
036b1ba8 | 462 | |
0b790b1e | 463 | if (runtime_initialized () |
9edcc12f | 464 | && is_ravenscar_task (ptid) |
0b790b1e | 465 | && !task_is_currently_active (ptid)) |
7e35103a | 466 | { |
7657f14d | 467 | /* Nothing. */ |
7e35103a | 468 | } |
9edcc12f | 469 | else |
d6ca69cd | 470 | beneath ()->prepare_to_store (regcache); |
036b1ba8 JB |
471 | } |
472 | ||
e02544b2 JB |
473 | /* Implement the to_stopped_by_sw_breakpoint target_ops "method". */ |
474 | ||
57810aa7 | 475 | bool |
f6ac5f3d | 476 | ravenscar_thread_target::stopped_by_sw_breakpoint () |
e02544b2 | 477 | { |
5b6ea500 TT |
478 | scoped_restore save_ptid = make_scoped_restore (&inferior_ptid); |
479 | inferior_ptid = get_base_thread_from_ravenscar_task (inferior_ptid); | |
480 | return beneath ()->stopped_by_sw_breakpoint (); | |
e02544b2 JB |
481 | } |
482 | ||
483 | /* Implement the to_stopped_by_hw_breakpoint target_ops "method". */ | |
484 | ||
57810aa7 | 485 | bool |
f6ac5f3d | 486 | ravenscar_thread_target::stopped_by_hw_breakpoint () |
e02544b2 | 487 | { |
5b6ea500 TT |
488 | scoped_restore save_ptid = make_scoped_restore (&inferior_ptid); |
489 | inferior_ptid = get_base_thread_from_ravenscar_task (inferior_ptid); | |
490 | return beneath ()->stopped_by_hw_breakpoint (); | |
e02544b2 JB |
491 | } |
492 | ||
493 | /* Implement the to_stopped_by_watchpoint target_ops "method". */ | |
494 | ||
57810aa7 | 495 | bool |
f6ac5f3d | 496 | ravenscar_thread_target::stopped_by_watchpoint () |
e02544b2 | 497 | { |
5b6ea500 TT |
498 | scoped_restore save_ptid = make_scoped_restore (&inferior_ptid); |
499 | inferior_ptid = get_base_thread_from_ravenscar_task (inferior_ptid); | |
500 | return beneath ()->stopped_by_watchpoint (); | |
e02544b2 JB |
501 | } |
502 | ||
503 | /* Implement the to_stopped_data_address target_ops "method". */ | |
504 | ||
57810aa7 | 505 | bool |
f6ac5f3d | 506 | ravenscar_thread_target::stopped_data_address (CORE_ADDR *addr_p) |
e02544b2 | 507 | { |
5b6ea500 TT |
508 | scoped_restore save_ptid = make_scoped_restore (&inferior_ptid); |
509 | inferior_ptid = get_base_thread_from_ravenscar_task (inferior_ptid); | |
510 | return beneath ()->stopped_data_address (addr_p); | |
e02544b2 JB |
511 | } |
512 | ||
f6ac5f3d PA |
513 | void |
514 | ravenscar_thread_target::mourn_inferior () | |
036b1ba8 | 515 | { |
0b790b1e | 516 | m_base_ptid = null_ptid; |
fd9faca8 | 517 | target_ops *beneath = this->beneath (); |
0b790b1e | 518 | unpush_target (this); |
fd9faca8 | 519 | beneath->mourn_inferior (); |
036b1ba8 JB |
520 | } |
521 | ||
e02544b2 JB |
522 | /* Implement the to_core_of_thread target_ops "method". */ |
523 | ||
f6ac5f3d PA |
524 | int |
525 | ravenscar_thread_target::core_of_thread (ptid_t ptid) | |
e02544b2 | 526 | { |
5b6ea500 TT |
527 | scoped_restore save_ptid = make_scoped_restore (&inferior_ptid); |
528 | inferior_ptid = get_base_thread_from_ravenscar_task (inferior_ptid); | |
529 | return beneath ()->core_of_thread (inferior_ptid); | |
e02544b2 JB |
530 | } |
531 | ||
036b1ba8 JB |
532 | /* Observer on inferior_created: push ravenscar thread stratum if needed. */ |
533 | ||
534 | static void | |
535 | ravenscar_inferior_created (struct target_ops *target, int from_tty) | |
536 | { | |
cf3fbed4 | 537 | const char *err_msg; |
7e35103a JB |
538 | |
539 | if (!ravenscar_task_support | |
7dc7c195 | 540 | || gdbarch_ravenscar_ops (target_gdbarch ()) == NULL |
7e35103a | 541 | || !has_ravenscar_runtime ()) |
25abf4de JB |
542 | return; |
543 | ||
cf3fbed4 JB |
544 | err_msg = ada_get_tcb_types_info (); |
545 | if (err_msg != NULL) | |
546 | { | |
8f6cb6c3 | 547 | warning (_("%s. Task/thread support disabled."), err_msg); |
cf3fbed4 JB |
548 | return; |
549 | } | |
550 | ||
0b790b1e TT |
551 | target_ops_up target_holder (new ravenscar_thread_target ()); |
552 | push_target (std::move (target_holder)); | |
036b1ba8 JB |
553 | } |
554 | ||
f6ac5f3d PA |
555 | ptid_t |
556 | ravenscar_thread_target::get_ada_task_ptid (long lwp, long thread) | |
036b1ba8 | 557 | { |
0b790b1e | 558 | return ptid_t (m_base_ptid.pid (), 0, thread); |
036b1ba8 JB |
559 | } |
560 | ||
036b1ba8 JB |
561 | /* Command-list for the "set/show ravenscar" prefix command. */ |
562 | static struct cmd_list_element *set_ravenscar_list; | |
563 | static struct cmd_list_element *show_ravenscar_list; | |
564 | ||
036b1ba8 JB |
565 | /* Implement the "show ravenscar task-switching" command. */ |
566 | ||
567 | static void | |
568 | show_ravenscar_task_switching_command (struct ui_file *file, int from_tty, | |
569 | struct cmd_list_element *c, | |
570 | const char *value) | |
571 | { | |
572 | if (ravenscar_task_support) | |
573 | fprintf_filtered (file, _("\ | |
b64edec4 | 574 | Support for Ravenscar task/thread switching is enabled\n")); |
036b1ba8 JB |
575 | else |
576 | fprintf_filtered (file, _("\ | |
b64edec4 | 577 | Support for Ravenscar task/thread switching is disabled\n")); |
036b1ba8 JB |
578 | } |
579 | ||
580 | /* Module startup initialization function, automagically called by | |
581 | init.c. */ | |
582 | ||
6c265988 | 583 | void _initialize_ravenscar (); |
036b1ba8 | 584 | void |
989f3c58 | 585 | _initialize_ravenscar () |
036b1ba8 | 586 | { |
036b1ba8 JB |
587 | /* Notice when the inferior is created in order to push the |
588 | ravenscar ops if needed. */ | |
76727919 | 589 | gdb::observers::inferior_created.attach (ravenscar_inferior_created); |
036b1ba8 | 590 | |
0743fc83 TT |
591 | add_basic_prefix_cmd ("ravenscar", no_class, |
592 | _("Prefix command for changing Ravenscar-specific settings."), | |
593 | &set_ravenscar_list, "set ravenscar ", 0, &setlist); | |
036b1ba8 | 594 | |
0743fc83 TT |
595 | add_show_prefix_cmd ("ravenscar", no_class, |
596 | _("Prefix command for showing Ravenscar-specific settings."), | |
597 | &show_ravenscar_list, "show ravenscar ", 0, &showlist); | |
036b1ba8 JB |
598 | |
599 | add_setshow_boolean_cmd ("task-switching", class_obscure, | |
600 | &ravenscar_task_support, _("\ | |
590042fc PW |
601 | Enable or disable support for GNAT Ravenscar tasks."), _("\ |
602 | Show whether support for GNAT Ravenscar tasks is enabled."), | |
036b1ba8 JB |
603 | _("\ |
604 | Enable or disable support for task/thread switching with the GNAT\n\ | |
605 | Ravenscar run-time library for bareboard configuration."), | |
606 | NULL, show_ravenscar_task_switching_command, | |
607 | &set_ravenscar_list, &show_ravenscar_list); | |
608 | } |