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6c95b8df PA |
1 | /* Program and address space management, for GDB, the GNU debugger. |
2 | ||
42a4f53d | 3 | Copyright (C) 2009-2019 Free Software Foundation, Inc. |
6c95b8df PA |
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 "gdbcmd.h" | |
22 | #include "objfiles.h" | |
23 | #include "arch-utils.h" | |
24 | #include "gdbcore.h" | |
25 | #include "solib.h" | |
26 | #include "gdbthread.h" | |
00431a78 | 27 | #include "inferior.h" |
6c95b8df PA |
28 | |
29 | /* The last program space number assigned. */ | |
30 | int last_program_space_num = 0; | |
31 | ||
32 | /* The head of the program spaces list. */ | |
33 | struct program_space *program_spaces; | |
34 | ||
35 | /* Pointer to the current program space. */ | |
36 | struct program_space *current_program_space; | |
37 | ||
38 | /* The last address space number assigned. */ | |
39 | static int highest_address_space_num; | |
40 | ||
8e260fc0 TT |
41 | \f |
42 | ||
43 | /* Keep a registry of per-program_space data-pointers required by other GDB | |
44 | modules. */ | |
45 | ||
6b81941e | 46 | DEFINE_REGISTRY (program_space, REGISTRY_ACCESS_FIELD) |
6c95b8df | 47 | |
3a8356ff YQ |
48 | /* Keep a registry of per-address_space data-pointers required by other GDB |
49 | modules. */ | |
50 | ||
51 | DEFINE_REGISTRY (address_space, REGISTRY_ACCESS_FIELD) | |
52 | ||
53 | \f | |
54 | ||
6c95b8df PA |
55 | /* Create a new address space object, and add it to the list. */ |
56 | ||
57 | struct address_space * | |
58 | new_address_space (void) | |
59 | { | |
60 | struct address_space *aspace; | |
61 | ||
41bf6aca | 62 | aspace = XCNEW (struct address_space); |
6c95b8df | 63 | aspace->num = ++highest_address_space_num; |
3a8356ff | 64 | address_space_alloc_data (aspace); |
6c95b8df PA |
65 | |
66 | return aspace; | |
67 | } | |
68 | ||
69 | /* Maybe create a new address space object, and add it to the list, or | |
70 | return a pointer to an existing address space, in case inferiors | |
71 | share an address space on this target system. */ | |
72 | ||
73 | struct address_space * | |
74 | maybe_new_address_space (void) | |
75 | { | |
f5656ead | 76 | int shared_aspace = gdbarch_has_shared_address_space (target_gdbarch ()); |
6c95b8df PA |
77 | |
78 | if (shared_aspace) | |
79 | { | |
80 | /* Just return the first in the list. */ | |
81 | return program_spaces->aspace; | |
82 | } | |
83 | ||
84 | return new_address_space (); | |
85 | } | |
86 | ||
87 | static void | |
88 | free_address_space (struct address_space *aspace) | |
89 | { | |
3a8356ff | 90 | address_space_free_data (aspace); |
6c95b8df PA |
91 | xfree (aspace); |
92 | } | |
93 | ||
c0694254 PA |
94 | int |
95 | address_space_num (struct address_space *aspace) | |
96 | { | |
97 | return aspace->num; | |
98 | } | |
99 | ||
6c95b8df PA |
100 | /* Start counting over from scratch. */ |
101 | ||
102 | static void | |
103 | init_address_spaces (void) | |
104 | { | |
105 | highest_address_space_num = 0; | |
106 | } | |
107 | ||
108 | \f | |
109 | ||
110 | /* Adds a new empty program space to the program space list, and binds | |
111 | it to ASPACE. Returns the pointer to the new object. */ | |
112 | ||
564b1e3f SM |
113 | program_space::program_space (address_space *aspace_) |
114 | : num (++last_program_space_num), aspace (aspace_) | |
6c95b8df | 115 | { |
564b1e3f | 116 | program_space_alloc_data (this); |
6c95b8df | 117 | |
b05b1202 | 118 | if (program_spaces == NULL) |
564b1e3f | 119 | program_spaces = this; |
b05b1202 PA |
120 | else |
121 | { | |
122 | struct program_space *last; | |
123 | ||
124 | for (last = program_spaces; last->next != NULL; last = last->next) | |
125 | ; | |
564b1e3f | 126 | last->next = this; |
b05b1202 | 127 | } |
6c95b8df PA |
128 | } |
129 | ||
130 | /* Releases program space PSPACE, and all its contents (shared | |
131 | libraries, objfiles, and any other references to the PSPACE in | |
132 | other modules). It is an internal error to call this when PSPACE | |
133 | is the current program space, since there should always be a | |
134 | program space. */ | |
135 | ||
564b1e3f | 136 | program_space::~program_space () |
6c95b8df | 137 | { |
564b1e3f | 138 | gdb_assert (this != current_program_space); |
6c95b8df | 139 | |
5ed8105e PA |
140 | scoped_restore_current_program_space restore_pspace; |
141 | ||
564b1e3f | 142 | set_current_program_space (this); |
6c95b8df | 143 | |
564b1e3f | 144 | breakpoint_program_space_exit (this); |
6c95b8df PA |
145 | no_shared_libraries (NULL, 0); |
146 | exec_close (); | |
147 | free_all_objfiles (); | |
f5656ead | 148 | if (!gdbarch_has_shared_address_space (target_gdbarch ())) |
564b1e3f SM |
149 | free_address_space (this->aspace); |
150 | clear_section_table (&this->target_sections); | |
151 | clear_program_space_solib_cache (this); | |
6c95b8df | 152 | /* Discard any data modules have associated with the PSPACE. */ |
564b1e3f | 153 | program_space_free_data (this); |
6c95b8df PA |
154 | } |
155 | ||
7cac64af TT |
156 | /* See progspace.h. */ |
157 | ||
158 | void | |
159 | program_space::add_objfile (struct objfile *objfile, struct objfile *before) | |
160 | { | |
161 | for (struct objfile **objp = &objfiles_head; | |
162 | *objp != NULL; | |
163 | objp = &((*objp)->next)) | |
164 | { | |
165 | if (*objp == before) | |
166 | { | |
167 | objfile->next = *objp; | |
168 | *objp = objfile; | |
169 | return; | |
170 | } | |
171 | } | |
172 | ||
173 | internal_error (__FILE__, __LINE__, | |
174 | _("put_objfile_before: before objfile not in list")); | |
175 | ||
176 | } | |
177 | ||
23452926 TT |
178 | /* See progspace.h. */ |
179 | ||
180 | void | |
181 | program_space::remove_objfile (struct objfile *objfile) | |
182 | { | |
183 | struct objfile **objpp; | |
184 | ||
185 | for (objpp = &object_files; *objpp != NULL; objpp = &((*objpp)->next)) | |
186 | { | |
187 | if (*objpp == objfile) | |
188 | { | |
189 | *objpp = (*objpp)->next; | |
190 | objfile->next = NULL; | |
191 | ||
192 | if (objfile == symfile_object_file) | |
193 | symfile_object_file = NULL; | |
194 | ||
195 | return; | |
196 | } | |
197 | } | |
198 | ||
199 | internal_error (__FILE__, __LINE__, | |
200 | _("remove_objfile: objfile already unlinked")); | |
201 | } | |
202 | ||
deeafabb TT |
203 | /* See progspace.h. */ |
204 | ||
205 | bool | |
206 | program_space::multi_objfile_p () const | |
207 | { | |
208 | return objfiles_head != nullptr && objfiles_head->next != nullptr; | |
209 | } | |
210 | ||
6c95b8df PA |
211 | /* Copies program space SRC to DEST. Copies the main executable file, |
212 | and the main symbol file. Returns DEST. */ | |
213 | ||
214 | struct program_space * | |
215 | clone_program_space (struct program_space *dest, struct program_space *src) | |
216 | { | |
5ed8105e | 217 | scoped_restore_current_program_space restore_pspace; |
6c95b8df PA |
218 | |
219 | set_current_program_space (dest); | |
220 | ||
1f0c4988 JK |
221 | if (src->pspace_exec_filename != NULL) |
222 | exec_file_attach (src->pspace_exec_filename, 0); | |
6c95b8df PA |
223 | |
224 | if (src->symfile_object_file != NULL) | |
b2e586e8 SM |
225 | symbol_file_add_main (objfile_name (src->symfile_object_file), |
226 | SYMFILE_DEFER_BP_RESET); | |
6c95b8df | 227 | |
6c95b8df PA |
228 | return dest; |
229 | } | |
230 | ||
231 | /* Sets PSPACE as the current program space. It is the caller's | |
232 | responsibility to make sure that the currently selected | |
233 | inferior/thread matches the selected program space. */ | |
234 | ||
235 | void | |
236 | set_current_program_space (struct program_space *pspace) | |
237 | { | |
238 | if (current_program_space == pspace) | |
239 | return; | |
240 | ||
241 | gdb_assert (pspace != NULL); | |
242 | ||
243 | current_program_space = pspace; | |
244 | ||
245 | /* Different symbols change our view of the frame chain. */ | |
246 | reinit_frame_cache (); | |
247 | } | |
248 | ||
6c95b8df PA |
249 | /* Returns true iff there's no inferior bound to PSPACE. */ |
250 | ||
7a41607e SM |
251 | int |
252 | program_space_empty_p (struct program_space *pspace) | |
6c95b8df | 253 | { |
6c95b8df PA |
254 | if (find_inferior_for_program_space (pspace) != NULL) |
255 | return 0; | |
256 | ||
257 | return 1; | |
258 | } | |
259 | ||
7a41607e SM |
260 | /* Remove a program space from the program spaces list and release it. It is |
261 | an error to call this function while PSPACE is the current program space. */ | |
6c95b8df PA |
262 | |
263 | void | |
7a41607e | 264 | delete_program_space (struct program_space *pspace) |
6c95b8df PA |
265 | { |
266 | struct program_space *ss, **ss_link; | |
4ab31498 SM |
267 | gdb_assert (pspace != NULL); |
268 | gdb_assert (pspace != current_program_space); | |
6c95b8df PA |
269 | |
270 | ss = program_spaces; | |
271 | ss_link = &program_spaces; | |
7a41607e | 272 | while (ss != NULL) |
6c95b8df | 273 | { |
7a41607e | 274 | if (ss == pspace) |
6c95b8df | 275 | { |
7a41607e SM |
276 | *ss_link = ss->next; |
277 | break; | |
6c95b8df PA |
278 | } |
279 | ||
7a41607e | 280 | ss_link = &ss->next; |
6c95b8df PA |
281 | ss = *ss_link; |
282 | } | |
7a41607e | 283 | |
564b1e3f | 284 | delete pspace; |
6c95b8df PA |
285 | } |
286 | ||
287 | /* Prints the list of program spaces and their details on UIOUT. If | |
288 | REQUESTED is not -1, it's the ID of the pspace that should be | |
289 | printed. Otherwise, all spaces are printed. */ | |
290 | ||
291 | static void | |
292 | print_program_space (struct ui_out *uiout, int requested) | |
293 | { | |
294 | struct program_space *pspace; | |
295 | int count = 0; | |
6c95b8df | 296 | |
6c95b8df PA |
297 | /* Compute number of pspaces we will print. */ |
298 | ALL_PSPACES (pspace) | |
299 | { | |
300 | if (requested != -1 && pspace->num != requested) | |
301 | continue; | |
302 | ||
303 | ++count; | |
304 | } | |
305 | ||
306 | /* There should always be at least one. */ | |
307 | gdb_assert (count > 0); | |
308 | ||
4a2b031d | 309 | ui_out_emit_table table_emitter (uiout, 3, count, "pspaces"); |
112e8700 SM |
310 | uiout->table_header (1, ui_left, "current", ""); |
311 | uiout->table_header (4, ui_left, "id", "Id"); | |
312 | uiout->table_header (17, ui_left, "exec", "Executable"); | |
313 | uiout->table_body (); | |
6c95b8df PA |
314 | |
315 | ALL_PSPACES (pspace) | |
316 | { | |
6c95b8df PA |
317 | struct inferior *inf; |
318 | int printed_header; | |
319 | ||
320 | if (requested != -1 && requested != pspace->num) | |
321 | continue; | |
322 | ||
2e783024 | 323 | ui_out_emit_tuple tuple_emitter (uiout, NULL); |
6c95b8df PA |
324 | |
325 | if (pspace == current_program_space) | |
112e8700 | 326 | uiout->field_string ("current", "*"); |
6c95b8df | 327 | else |
112e8700 | 328 | uiout->field_skip ("current"); |
6c95b8df | 329 | |
381befee | 330 | uiout->field_signed ("id", pspace->num); |
6c95b8df | 331 | |
1f0c4988 | 332 | if (pspace->pspace_exec_filename) |
112e8700 | 333 | uiout->field_string ("exec", pspace->pspace_exec_filename); |
6c95b8df | 334 | else |
112e8700 | 335 | uiout->field_skip ("exec"); |
6c95b8df PA |
336 | |
337 | /* Print extra info that doesn't really fit in tabular form. | |
338 | Currently, we print the list of inferiors bound to a pspace. | |
339 | There can be more than one inferior bound to the same pspace, | |
340 | e.g., both parent/child inferiors in a vfork, or, on targets | |
341 | that share pspaces between inferiors. */ | |
342 | printed_header = 0; | |
343 | for (inf = inferior_list; inf; inf = inf->next) | |
344 | if (inf->pspace == pspace) | |
345 | { | |
346 | if (!printed_header) | |
347 | { | |
348 | printed_header = 1; | |
349 | printf_filtered ("\n\tBound inferiors: ID %d (%s)", | |
350 | inf->num, | |
a068643d | 351 | target_pid_to_str (ptid_t (inf->pid)).c_str ()); |
6c95b8df PA |
352 | } |
353 | else | |
354 | printf_filtered (", ID %d (%s)", | |
355 | inf->num, | |
a068643d | 356 | target_pid_to_str (ptid_t (inf->pid)).c_str ()); |
6c95b8df PA |
357 | } |
358 | ||
112e8700 | 359 | uiout->text ("\n"); |
6c95b8df | 360 | } |
6c95b8df PA |
361 | } |
362 | ||
363 | /* Boolean test for an already-known program space id. */ | |
364 | ||
365 | static int | |
366 | valid_program_space_id (int num) | |
367 | { | |
368 | struct program_space *pspace; | |
369 | ||
370 | ALL_PSPACES (pspace) | |
371 | if (pspace->num == num) | |
372 | return 1; | |
373 | ||
374 | return 0; | |
375 | } | |
376 | ||
377 | /* If ARGS is NULL or empty, print information about all program | |
378 | spaces. Otherwise, ARGS is a text representation of a LONG | |
379 | indicating which the program space to print information about. */ | |
380 | ||
381 | static void | |
9c504b5d | 382 | maintenance_info_program_spaces_command (const char *args, int from_tty) |
6c95b8df PA |
383 | { |
384 | int requested = -1; | |
385 | ||
386 | if (args && *args) | |
387 | { | |
388 | requested = parse_and_eval_long (args); | |
389 | if (!valid_program_space_id (requested)) | |
390 | error (_("program space ID %d not known."), requested); | |
391 | } | |
392 | ||
79a45e25 | 393 | print_program_space (current_uiout, requested); |
6c95b8df PA |
394 | } |
395 | ||
396 | /* Simply returns the count of program spaces. */ | |
397 | ||
398 | int | |
399 | number_of_program_spaces (void) | |
400 | { | |
401 | struct program_space *pspace; | |
402 | int count = 0; | |
403 | ||
404 | ALL_PSPACES (pspace) | |
405 | count++; | |
406 | ||
407 | return count; | |
408 | } | |
409 | ||
410 | /* Update all program spaces matching to address spaces. The user may | |
411 | have created several program spaces, and loaded executables into | |
412 | them before connecting to the target interface that will create the | |
413 | inferiors. All that happens before GDB has a chance to know if the | |
414 | inferiors will share an address space or not. Call this after | |
415 | having connected to the target interface and having fetched the | |
416 | target description, to fixup the program/address spaces mappings. | |
417 | ||
418 | It is assumed that there are no bound inferiors yet, otherwise, | |
419 | they'd be left with stale referenced to released aspaces. */ | |
420 | ||
421 | void | |
422 | update_address_spaces (void) | |
423 | { | |
f5656ead | 424 | int shared_aspace = gdbarch_has_shared_address_space (target_gdbarch ()); |
6c95b8df | 425 | struct program_space *pspace; |
7e9af34a | 426 | struct inferior *inf; |
6c95b8df PA |
427 | |
428 | init_address_spaces (); | |
429 | ||
7e9af34a | 430 | if (shared_aspace) |
6c95b8df | 431 | { |
7e9af34a | 432 | struct address_space *aspace = new_address_space (); |
ad3bbd48 | 433 | |
7e9af34a DJ |
434 | free_address_space (current_program_space->aspace); |
435 | ALL_PSPACES (pspace) | |
436 | pspace->aspace = aspace; | |
6c95b8df | 437 | } |
7e9af34a DJ |
438 | else |
439 | ALL_PSPACES (pspace) | |
440 | { | |
441 | free_address_space (pspace->aspace); | |
442 | pspace->aspace = new_address_space (); | |
443 | } | |
444 | ||
445 | for (inf = inferior_list; inf; inf = inf->next) | |
f5656ead | 446 | if (gdbarch_has_global_solist (target_gdbarch ())) |
7e9af34a DJ |
447 | inf->aspace = maybe_new_address_space (); |
448 | else | |
449 | inf->aspace = inf->pspace->aspace; | |
6c95b8df PA |
450 | } |
451 | ||
6c95b8df PA |
452 | \f |
453 | ||
edcc5120 TT |
454 | /* See progspace.h. */ |
455 | ||
456 | void | |
457 | clear_program_space_solib_cache (struct program_space *pspace) | |
458 | { | |
bcb430e4 | 459 | pspace->added_solibs.clear (); |
6fb16ce6 | 460 | pspace->deleted_solibs.clear (); |
edcc5120 TT |
461 | } |
462 | ||
463 | \f | |
464 | ||
6c95b8df PA |
465 | void |
466 | initialize_progspace (void) | |
467 | { | |
468 | add_cmd ("program-spaces", class_maintenance, | |
3e43a32a MS |
469 | maintenance_info_program_spaces_command, |
470 | _("Info about currently known program spaces."), | |
6c95b8df PA |
471 | &maintenanceinfolist); |
472 | ||
473 | /* There's always one program space. Note that this function isn't | |
474 | an automatic _initialize_foo function, since other | |
475 | _initialize_foo routines may need to install their per-pspace | |
476 | data keys. We can only allocate a progspace when all those | |
477 | modules have done that. Do this before | |
478 | initialize_current_architecture, because that accesses exec_bfd, | |
479 | which in turn dereferences current_program_space. */ | |
564b1e3f | 480 | current_program_space = new program_space (new_address_space ()); |
6c95b8df | 481 | } |