1 /* Program and address space management, for GDB, the GNU debugger.
3 Copyright (C) 2009-2017 Free Software Foundation, Inc.
5 This file is part of GDB.
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.
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.
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/>. */
23 #include "arch-utils.h"
26 #include "gdbthread.h"
28 /* The last program space number assigned. */
29 int last_program_space_num
= 0;
31 /* The head of the program spaces list. */
32 struct program_space
*program_spaces
;
34 /* Pointer to the current program space. */
35 struct program_space
*current_program_space
;
37 /* The last address space number assigned. */
38 static int highest_address_space_num
;
42 /* Keep a registry of per-program_space data-pointers required by other GDB
45 DEFINE_REGISTRY (program_space
, REGISTRY_ACCESS_FIELD
)
47 /* An address space. It is used for comparing if pspaces/inferior/threads
48 see the same address space and for associating caches to each address
55 /* Per aspace data-pointers required by other GDB modules. */
59 /* Keep a registry of per-address_space data-pointers required by other GDB
62 DEFINE_REGISTRY (address_space
, REGISTRY_ACCESS_FIELD
)
66 /* Create a new address space object, and add it to the list. */
68 struct address_space
*
69 new_address_space (void)
71 struct address_space
*aspace
;
73 aspace
= XCNEW (struct address_space
);
74 aspace
->num
= ++highest_address_space_num
;
75 address_space_alloc_data (aspace
);
80 /* Maybe create a new address space object, and add it to the list, or
81 return a pointer to an existing address space, in case inferiors
82 share an address space on this target system. */
84 struct address_space
*
85 maybe_new_address_space (void)
87 int shared_aspace
= gdbarch_has_shared_address_space (target_gdbarch ());
91 /* Just return the first in the list. */
92 return program_spaces
->aspace
;
95 return new_address_space ();
99 free_address_space (struct address_space
*aspace
)
101 address_space_free_data (aspace
);
106 address_space_num (struct address_space
*aspace
)
111 /* Start counting over from scratch. */
114 init_address_spaces (void)
116 highest_address_space_num
= 0;
121 /* Adds a new empty program space to the program space list, and binds
122 it to ASPACE. Returns the pointer to the new object. */
124 struct program_space
*
125 add_program_space (struct address_space
*aspace
)
127 struct program_space
*pspace
;
129 pspace
= XCNEW (struct program_space
);
131 pspace
->num
= ++last_program_space_num
;
132 pspace
->aspace
= aspace
;
134 program_space_alloc_data (pspace
);
136 if (program_spaces
== NULL
)
137 program_spaces
= pspace
;
140 struct program_space
*last
;
142 for (last
= program_spaces
; last
->next
!= NULL
; last
= last
->next
)
150 /* Releases program space PSPACE, and all its contents (shared
151 libraries, objfiles, and any other references to the PSPACE in
152 other modules). It is an internal error to call this when PSPACE
153 is the current program space, since there should always be a
157 release_program_space (struct program_space
*pspace
)
159 gdb_assert (pspace
!= current_program_space
);
161 scoped_restore_current_program_space restore_pspace
;
163 set_current_program_space (pspace
);
165 breakpoint_program_space_exit (pspace
);
166 no_shared_libraries (NULL
, 0);
168 free_all_objfiles ();
169 if (!gdbarch_has_shared_address_space (target_gdbarch ()))
170 free_address_space (pspace
->aspace
);
171 clear_section_table (&pspace
->target_sections
);
172 clear_program_space_solib_cache (pspace
);
173 /* Discard any data modules have associated with the PSPACE. */
174 program_space_free_data (pspace
);
178 /* Copies program space SRC to DEST. Copies the main executable file,
179 and the main symbol file. Returns DEST. */
181 struct program_space
*
182 clone_program_space (struct program_space
*dest
, struct program_space
*src
)
184 scoped_restore_current_program_space restore_pspace
;
186 set_current_program_space (dest
);
188 if (src
->pspace_exec_filename
!= NULL
)
189 exec_file_attach (src
->pspace_exec_filename
, 0);
191 if (src
->symfile_object_file
!= NULL
)
192 symbol_file_add_main (objfile_name (src
->symfile_object_file
), 0);
197 /* Sets PSPACE as the current program space. It is the caller's
198 responsibility to make sure that the currently selected
199 inferior/thread matches the selected program space. */
202 set_current_program_space (struct program_space
*pspace
)
204 if (current_program_space
== pspace
)
207 gdb_assert (pspace
!= NULL
);
209 current_program_space
= pspace
;
211 /* Different symbols change our view of the frame chain. */
212 reinit_frame_cache ();
215 /* Returns true iff there's no inferior bound to PSPACE. */
218 program_space_empty_p (struct program_space
*pspace
)
220 if (find_inferior_for_program_space (pspace
) != NULL
)
226 /* Remove a program space from the program spaces list and release it. It is
227 an error to call this function while PSPACE is the current program space. */
230 delete_program_space (struct program_space
*pspace
)
232 struct program_space
*ss
, **ss_link
;
233 gdb_assert (pspace
!= NULL
);
234 gdb_assert (pspace
!= current_program_space
);
237 ss_link
= &program_spaces
;
250 release_program_space (pspace
);
253 /* Prints the list of program spaces and their details on UIOUT. If
254 REQUESTED is not -1, it's the ID of the pspace that should be
255 printed. Otherwise, all spaces are printed. */
258 print_program_space (struct ui_out
*uiout
, int requested
)
260 struct program_space
*pspace
;
263 /* Compute number of pspaces we will print. */
266 if (requested
!= -1 && pspace
->num
!= requested
)
272 /* There should always be at least one. */
273 gdb_assert (count
> 0);
275 ui_out_emit_table
table_emitter (uiout
, 3, count
, "pspaces");
276 uiout
->table_header (1, ui_left
, "current", "");
277 uiout
->table_header (4, ui_left
, "id", "Id");
278 uiout
->table_header (17, ui_left
, "exec", "Executable");
279 uiout
->table_body ();
283 struct inferior
*inf
;
286 if (requested
!= -1 && requested
!= pspace
->num
)
289 ui_out_emit_tuple
tuple_emitter (uiout
, NULL
);
291 if (pspace
== current_program_space
)
292 uiout
->field_string ("current", "*");
294 uiout
->field_skip ("current");
296 uiout
->field_int ("id", pspace
->num
);
298 if (pspace
->pspace_exec_filename
)
299 uiout
->field_string ("exec", pspace
->pspace_exec_filename
);
301 uiout
->field_skip ("exec");
303 /* Print extra info that doesn't really fit in tabular form.
304 Currently, we print the list of inferiors bound to a pspace.
305 There can be more than one inferior bound to the same pspace,
306 e.g., both parent/child inferiors in a vfork, or, on targets
307 that share pspaces between inferiors. */
309 for (inf
= inferior_list
; inf
; inf
= inf
->next
)
310 if (inf
->pspace
== pspace
)
315 printf_filtered ("\n\tBound inferiors: ID %d (%s)",
317 target_pid_to_str (pid_to_ptid (inf
->pid
)));
320 printf_filtered (", ID %d (%s)",
322 target_pid_to_str (pid_to_ptid (inf
->pid
)));
329 /* Boolean test for an already-known program space id. */
332 valid_program_space_id (int num
)
334 struct program_space
*pspace
;
337 if (pspace
->num
== num
)
343 /* If ARGS is NULL or empty, print information about all program
344 spaces. Otherwise, ARGS is a text representation of a LONG
345 indicating which the program space to print information about. */
348 maintenance_info_program_spaces_command (char *args
, int from_tty
)
354 requested
= parse_and_eval_long (args
);
355 if (!valid_program_space_id (requested
))
356 error (_("program space ID %d not known."), requested
);
359 print_program_space (current_uiout
, requested
);
362 /* Simply returns the count of program spaces. */
365 number_of_program_spaces (void)
367 struct program_space
*pspace
;
376 /* Update all program spaces matching to address spaces. The user may
377 have created several program spaces, and loaded executables into
378 them before connecting to the target interface that will create the
379 inferiors. All that happens before GDB has a chance to know if the
380 inferiors will share an address space or not. Call this after
381 having connected to the target interface and having fetched the
382 target description, to fixup the program/address spaces mappings.
384 It is assumed that there are no bound inferiors yet, otherwise,
385 they'd be left with stale referenced to released aspaces. */
388 update_address_spaces (void)
390 int shared_aspace
= gdbarch_has_shared_address_space (target_gdbarch ());
391 struct program_space
*pspace
;
392 struct inferior
*inf
;
394 init_address_spaces ();
398 struct address_space
*aspace
= new_address_space ();
400 free_address_space (current_program_space
->aspace
);
402 pspace
->aspace
= aspace
;
407 free_address_space (pspace
->aspace
);
408 pspace
->aspace
= new_address_space ();
411 for (inf
= inferior_list
; inf
; inf
= inf
->next
)
412 if (gdbarch_has_global_solist (target_gdbarch ()))
413 inf
->aspace
= maybe_new_address_space ();
415 inf
->aspace
= inf
->pspace
->aspace
;
420 /* See progspace.h. */
423 clear_program_space_solib_cache (struct program_space
*pspace
)
425 VEC_free (so_list_ptr
, pspace
->added_solibs
);
427 free_char_ptr_vec (pspace
->deleted_solibs
);
428 pspace
->deleted_solibs
= NULL
;
434 initialize_progspace (void)
436 add_cmd ("program-spaces", class_maintenance
,
437 maintenance_info_program_spaces_command
,
438 _("Info about currently known program spaces."),
439 &maintenanceinfolist
);
441 /* There's always one program space. Note that this function isn't
442 an automatic _initialize_foo function, since other
443 _initialize_foo routines may need to install their per-pspace
444 data keys. We can only allocate a progspace when all those
445 modules have done that. Do this before
446 initialize_current_architecture, because that accesses exec_bfd,
447 which in turn dereferences current_program_space. */
448 current_program_space
= add_program_space (new_address_space ());