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6c95b8df PA |
1 | /* Program and address space management, for GDB, the GNU debugger. |
2 | ||
e2882c85 | 3 | Copyright (C) 2009-2018 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" | |
27 | ||
28 | /* The last program space number assigned. */ | |
29 | int last_program_space_num = 0; | |
30 | ||
31 | /* The head of the program spaces list. */ | |
32 | struct program_space *program_spaces; | |
33 | ||
34 | /* Pointer to the current program space. */ | |
35 | struct program_space *current_program_space; | |
36 | ||
37 | /* The last address space number assigned. */ | |
38 | static int highest_address_space_num; | |
39 | ||
8e260fc0 TT |
40 | \f |
41 | ||
42 | /* Keep a registry of per-program_space data-pointers required by other GDB | |
43 | modules. */ | |
44 | ||
6b81941e | 45 | DEFINE_REGISTRY (program_space, REGISTRY_ACCESS_FIELD) |
6c95b8df | 46 | |
3a8356ff YQ |
47 | /* Keep a registry of per-address_space data-pointers required by other GDB |
48 | modules. */ | |
49 | ||
50 | DEFINE_REGISTRY (address_space, REGISTRY_ACCESS_FIELD) | |
51 | ||
52 | \f | |
53 | ||
6c95b8df PA |
54 | /* Create a new address space object, and add it to the list. */ |
55 | ||
56 | struct address_space * | |
57 | new_address_space (void) | |
58 | { | |
59 | struct address_space *aspace; | |
60 | ||
41bf6aca | 61 | aspace = XCNEW (struct address_space); |
6c95b8df | 62 | aspace->num = ++highest_address_space_num; |
3a8356ff | 63 | address_space_alloc_data (aspace); |
6c95b8df PA |
64 | |
65 | return aspace; | |
66 | } | |
67 | ||
68 | /* Maybe create a new address space object, and add it to the list, or | |
69 | return a pointer to an existing address space, in case inferiors | |
70 | share an address space on this target system. */ | |
71 | ||
72 | struct address_space * | |
73 | maybe_new_address_space (void) | |
74 | { | |
f5656ead | 75 | int shared_aspace = gdbarch_has_shared_address_space (target_gdbarch ()); |
6c95b8df PA |
76 | |
77 | if (shared_aspace) | |
78 | { | |
79 | /* Just return the first in the list. */ | |
80 | return program_spaces->aspace; | |
81 | } | |
82 | ||
83 | return new_address_space (); | |
84 | } | |
85 | ||
86 | static void | |
87 | free_address_space (struct address_space *aspace) | |
88 | { | |
3a8356ff | 89 | address_space_free_data (aspace); |
6c95b8df PA |
90 | xfree (aspace); |
91 | } | |
92 | ||
c0694254 PA |
93 | int |
94 | address_space_num (struct address_space *aspace) | |
95 | { | |
96 | return aspace->num; | |
97 | } | |
98 | ||
6c95b8df PA |
99 | /* Start counting over from scratch. */ |
100 | ||
101 | static void | |
102 | init_address_spaces (void) | |
103 | { | |
104 | highest_address_space_num = 0; | |
105 | } | |
106 | ||
107 | \f | |
108 | ||
109 | /* Adds a new empty program space to the program space list, and binds | |
110 | it to ASPACE. Returns the pointer to the new object. */ | |
111 | ||
564b1e3f SM |
112 | program_space::program_space (address_space *aspace_) |
113 | : num (++last_program_space_num), aspace (aspace_) | |
6c95b8df | 114 | { |
564b1e3f | 115 | program_space_alloc_data (this); |
6c95b8df | 116 | |
b05b1202 | 117 | if (program_spaces == NULL) |
564b1e3f | 118 | program_spaces = this; |
b05b1202 PA |
119 | else |
120 | { | |
121 | struct program_space *last; | |
122 | ||
123 | for (last = program_spaces; last->next != NULL; last = last->next) | |
124 | ; | |
564b1e3f | 125 | last->next = this; |
b05b1202 | 126 | } |
6c95b8df PA |
127 | } |
128 | ||
129 | /* Releases program space PSPACE, and all its contents (shared | |
130 | libraries, objfiles, and any other references to the PSPACE in | |
131 | other modules). It is an internal error to call this when PSPACE | |
132 | is the current program space, since there should always be a | |
133 | program space. */ | |
134 | ||
564b1e3f | 135 | program_space::~program_space () |
6c95b8df | 136 | { |
564b1e3f | 137 | gdb_assert (this != current_program_space); |
6c95b8df | 138 | |
5ed8105e PA |
139 | scoped_restore_current_program_space restore_pspace; |
140 | ||
564b1e3f | 141 | set_current_program_space (this); |
6c95b8df | 142 | |
564b1e3f | 143 | breakpoint_program_space_exit (this); |
6c95b8df PA |
144 | no_shared_libraries (NULL, 0); |
145 | exec_close (); | |
146 | free_all_objfiles (); | |
f5656ead | 147 | if (!gdbarch_has_shared_address_space (target_gdbarch ())) |
564b1e3f SM |
148 | free_address_space (this->aspace); |
149 | clear_section_table (&this->target_sections); | |
150 | clear_program_space_solib_cache (this); | |
6c95b8df | 151 | /* Discard any data modules have associated with the PSPACE. */ |
564b1e3f | 152 | program_space_free_data (this); |
6c95b8df PA |
153 | } |
154 | ||
6c95b8df PA |
155 | /* Copies program space SRC to DEST. Copies the main executable file, |
156 | and the main symbol file. Returns DEST. */ | |
157 | ||
158 | struct program_space * | |
159 | clone_program_space (struct program_space *dest, struct program_space *src) | |
160 | { | |
5ed8105e | 161 | scoped_restore_current_program_space restore_pspace; |
6c95b8df PA |
162 | |
163 | set_current_program_space (dest); | |
164 | ||
1f0c4988 JK |
165 | if (src->pspace_exec_filename != NULL) |
166 | exec_file_attach (src->pspace_exec_filename, 0); | |
6c95b8df PA |
167 | |
168 | if (src->symfile_object_file != NULL) | |
b2e586e8 SM |
169 | symbol_file_add_main (objfile_name (src->symfile_object_file), |
170 | SYMFILE_DEFER_BP_RESET); | |
6c95b8df | 171 | |
6c95b8df PA |
172 | return dest; |
173 | } | |
174 | ||
175 | /* Sets PSPACE as the current program space. It is the caller's | |
176 | responsibility to make sure that the currently selected | |
177 | inferior/thread matches the selected program space. */ | |
178 | ||
179 | void | |
180 | set_current_program_space (struct program_space *pspace) | |
181 | { | |
182 | if (current_program_space == pspace) | |
183 | return; | |
184 | ||
185 | gdb_assert (pspace != NULL); | |
186 | ||
187 | current_program_space = pspace; | |
188 | ||
189 | /* Different symbols change our view of the frame chain. */ | |
190 | reinit_frame_cache (); | |
191 | } | |
192 | ||
6c95b8df PA |
193 | /* Returns true iff there's no inferior bound to PSPACE. */ |
194 | ||
7a41607e SM |
195 | int |
196 | program_space_empty_p (struct program_space *pspace) | |
6c95b8df | 197 | { |
6c95b8df PA |
198 | if (find_inferior_for_program_space (pspace) != NULL) |
199 | return 0; | |
200 | ||
201 | return 1; | |
202 | } | |
203 | ||
7a41607e SM |
204 | /* Remove a program space from the program spaces list and release it. It is |
205 | an error to call this function while PSPACE is the current program space. */ | |
6c95b8df PA |
206 | |
207 | void | |
7a41607e | 208 | delete_program_space (struct program_space *pspace) |
6c95b8df PA |
209 | { |
210 | struct program_space *ss, **ss_link; | |
4ab31498 SM |
211 | gdb_assert (pspace != NULL); |
212 | gdb_assert (pspace != current_program_space); | |
6c95b8df PA |
213 | |
214 | ss = program_spaces; | |
215 | ss_link = &program_spaces; | |
7a41607e | 216 | while (ss != NULL) |
6c95b8df | 217 | { |
7a41607e | 218 | if (ss == pspace) |
6c95b8df | 219 | { |
7a41607e SM |
220 | *ss_link = ss->next; |
221 | break; | |
6c95b8df PA |
222 | } |
223 | ||
7a41607e | 224 | ss_link = &ss->next; |
6c95b8df PA |
225 | ss = *ss_link; |
226 | } | |
7a41607e | 227 | |
564b1e3f | 228 | delete pspace; |
6c95b8df PA |
229 | } |
230 | ||
231 | /* Prints the list of program spaces and their details on UIOUT. If | |
232 | REQUESTED is not -1, it's the ID of the pspace that should be | |
233 | printed. Otherwise, all spaces are printed. */ | |
234 | ||
235 | static void | |
236 | print_program_space (struct ui_out *uiout, int requested) | |
237 | { | |
238 | struct program_space *pspace; | |
239 | int count = 0; | |
6c95b8df | 240 | |
6c95b8df PA |
241 | /* Compute number of pspaces we will print. */ |
242 | ALL_PSPACES (pspace) | |
243 | { | |
244 | if (requested != -1 && pspace->num != requested) | |
245 | continue; | |
246 | ||
247 | ++count; | |
248 | } | |
249 | ||
250 | /* There should always be at least one. */ | |
251 | gdb_assert (count > 0); | |
252 | ||
4a2b031d | 253 | ui_out_emit_table table_emitter (uiout, 3, count, "pspaces"); |
112e8700 SM |
254 | uiout->table_header (1, ui_left, "current", ""); |
255 | uiout->table_header (4, ui_left, "id", "Id"); | |
256 | uiout->table_header (17, ui_left, "exec", "Executable"); | |
257 | uiout->table_body (); | |
6c95b8df PA |
258 | |
259 | ALL_PSPACES (pspace) | |
260 | { | |
6c95b8df PA |
261 | struct inferior *inf; |
262 | int printed_header; | |
263 | ||
264 | if (requested != -1 && requested != pspace->num) | |
265 | continue; | |
266 | ||
2e783024 | 267 | ui_out_emit_tuple tuple_emitter (uiout, NULL); |
6c95b8df PA |
268 | |
269 | if (pspace == current_program_space) | |
112e8700 | 270 | uiout->field_string ("current", "*"); |
6c95b8df | 271 | else |
112e8700 | 272 | uiout->field_skip ("current"); |
6c95b8df | 273 | |
112e8700 | 274 | uiout->field_int ("id", pspace->num); |
6c95b8df | 275 | |
1f0c4988 | 276 | if (pspace->pspace_exec_filename) |
112e8700 | 277 | uiout->field_string ("exec", pspace->pspace_exec_filename); |
6c95b8df | 278 | else |
112e8700 | 279 | uiout->field_skip ("exec"); |
6c95b8df PA |
280 | |
281 | /* Print extra info that doesn't really fit in tabular form. | |
282 | Currently, we print the list of inferiors bound to a pspace. | |
283 | There can be more than one inferior bound to the same pspace, | |
284 | e.g., both parent/child inferiors in a vfork, or, on targets | |
285 | that share pspaces between inferiors. */ | |
286 | printed_header = 0; | |
287 | for (inf = inferior_list; inf; inf = inf->next) | |
288 | if (inf->pspace == pspace) | |
289 | { | |
290 | if (!printed_header) | |
291 | { | |
292 | printed_header = 1; | |
293 | printf_filtered ("\n\tBound inferiors: ID %d (%s)", | |
294 | inf->num, | |
295 | target_pid_to_str (pid_to_ptid (inf->pid))); | |
296 | } | |
297 | else | |
298 | printf_filtered (", ID %d (%s)", | |
299 | inf->num, | |
300 | target_pid_to_str (pid_to_ptid (inf->pid))); | |
301 | } | |
302 | ||
112e8700 | 303 | uiout->text ("\n"); |
6c95b8df | 304 | } |
6c95b8df PA |
305 | } |
306 | ||
307 | /* Boolean test for an already-known program space id. */ | |
308 | ||
309 | static int | |
310 | valid_program_space_id (int num) | |
311 | { | |
312 | struct program_space *pspace; | |
313 | ||
314 | ALL_PSPACES (pspace) | |
315 | if (pspace->num == num) | |
316 | return 1; | |
317 | ||
318 | return 0; | |
319 | } | |
320 | ||
321 | /* If ARGS is NULL or empty, print information about all program | |
322 | spaces. Otherwise, ARGS is a text representation of a LONG | |
323 | indicating which the program space to print information about. */ | |
324 | ||
325 | static void | |
9c504b5d | 326 | maintenance_info_program_spaces_command (const char *args, int from_tty) |
6c95b8df PA |
327 | { |
328 | int requested = -1; | |
329 | ||
330 | if (args && *args) | |
331 | { | |
332 | requested = parse_and_eval_long (args); | |
333 | if (!valid_program_space_id (requested)) | |
334 | error (_("program space ID %d not known."), requested); | |
335 | } | |
336 | ||
79a45e25 | 337 | print_program_space (current_uiout, requested); |
6c95b8df PA |
338 | } |
339 | ||
340 | /* Simply returns the count of program spaces. */ | |
341 | ||
342 | int | |
343 | number_of_program_spaces (void) | |
344 | { | |
345 | struct program_space *pspace; | |
346 | int count = 0; | |
347 | ||
348 | ALL_PSPACES (pspace) | |
349 | count++; | |
350 | ||
351 | return count; | |
352 | } | |
353 | ||
354 | /* Update all program spaces matching to address spaces. The user may | |
355 | have created several program spaces, and loaded executables into | |
356 | them before connecting to the target interface that will create the | |
357 | inferiors. All that happens before GDB has a chance to know if the | |
358 | inferiors will share an address space or not. Call this after | |
359 | having connected to the target interface and having fetched the | |
360 | target description, to fixup the program/address spaces mappings. | |
361 | ||
362 | It is assumed that there are no bound inferiors yet, otherwise, | |
363 | they'd be left with stale referenced to released aspaces. */ | |
364 | ||
365 | void | |
366 | update_address_spaces (void) | |
367 | { | |
f5656ead | 368 | int shared_aspace = gdbarch_has_shared_address_space (target_gdbarch ()); |
6c95b8df | 369 | struct program_space *pspace; |
7e9af34a | 370 | struct inferior *inf; |
6c95b8df PA |
371 | |
372 | init_address_spaces (); | |
373 | ||
7e9af34a | 374 | if (shared_aspace) |
6c95b8df | 375 | { |
7e9af34a | 376 | struct address_space *aspace = new_address_space (); |
ad3bbd48 | 377 | |
7e9af34a DJ |
378 | free_address_space (current_program_space->aspace); |
379 | ALL_PSPACES (pspace) | |
380 | pspace->aspace = aspace; | |
6c95b8df | 381 | } |
7e9af34a DJ |
382 | else |
383 | ALL_PSPACES (pspace) | |
384 | { | |
385 | free_address_space (pspace->aspace); | |
386 | pspace->aspace = new_address_space (); | |
387 | } | |
388 | ||
389 | for (inf = inferior_list; inf; inf = inf->next) | |
f5656ead | 390 | if (gdbarch_has_global_solist (target_gdbarch ())) |
7e9af34a DJ |
391 | inf->aspace = maybe_new_address_space (); |
392 | else | |
393 | inf->aspace = inf->pspace->aspace; | |
6c95b8df PA |
394 | } |
395 | ||
6c95b8df PA |
396 | \f |
397 | ||
edcc5120 TT |
398 | /* See progspace.h. */ |
399 | ||
400 | void | |
401 | clear_program_space_solib_cache (struct program_space *pspace) | |
402 | { | |
edcc5120 | 403 | VEC_free (so_list_ptr, pspace->added_solibs); |
e4ab2fad | 404 | |
6fb16ce6 | 405 | pspace->deleted_solibs.clear (); |
edcc5120 TT |
406 | } |
407 | ||
408 | \f | |
409 | ||
6c95b8df PA |
410 | void |
411 | initialize_progspace (void) | |
412 | { | |
413 | add_cmd ("program-spaces", class_maintenance, | |
3e43a32a MS |
414 | maintenance_info_program_spaces_command, |
415 | _("Info about currently known program spaces."), | |
6c95b8df PA |
416 | &maintenanceinfolist); |
417 | ||
418 | /* There's always one program space. Note that this function isn't | |
419 | an automatic _initialize_foo function, since other | |
420 | _initialize_foo routines may need to install their per-pspace | |
421 | data keys. We can only allocate a progspace when all those | |
422 | modules have done that. Do this before | |
423 | initialize_current_architecture, because that accesses exec_bfd, | |
424 | which in turn dereferences current_program_space. */ | |
564b1e3f | 425 | current_program_space = new program_space (new_address_space ()); |
6c95b8df | 426 | } |