1 /* Program and address space management, for GDB, the GNU debugger.
3 Copyright (C) 2009-2018 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 /* Keep a registry of per-address_space data-pointers required by other GDB
50 DEFINE_REGISTRY (address_space
, REGISTRY_ACCESS_FIELD
)
54 /* Create a new address space object, and add it to the list. */
56 struct address_space
*
57 new_address_space (void)
59 struct address_space
*aspace
;
61 aspace
= XCNEW (struct address_space
);
62 aspace
->num
= ++highest_address_space_num
;
63 address_space_alloc_data (aspace
);
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. */
72 struct address_space
*
73 maybe_new_address_space (void)
75 int shared_aspace
= gdbarch_has_shared_address_space (target_gdbarch ());
79 /* Just return the first in the list. */
80 return program_spaces
->aspace
;
83 return new_address_space ();
87 free_address_space (struct address_space
*aspace
)
89 address_space_free_data (aspace
);
94 address_space_num (struct address_space
*aspace
)
99 /* Start counting over from scratch. */
102 init_address_spaces (void)
104 highest_address_space_num
= 0;
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. */
112 program_space::program_space (address_space
*aspace_
)
113 : num (++last_program_space_num
), aspace (aspace_
)
115 program_space_alloc_data (this);
117 if (program_spaces
== NULL
)
118 program_spaces
= this;
121 struct program_space
*last
;
123 for (last
= program_spaces
; last
->next
!= NULL
; last
= last
->next
)
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
135 program_space::~program_space ()
137 gdb_assert (this != current_program_space
);
139 scoped_restore_current_program_space restore_pspace
;
141 set_current_program_space (this);
143 breakpoint_program_space_exit (this);
144 no_shared_libraries (NULL
, 0);
146 free_all_objfiles ();
147 if (!gdbarch_has_shared_address_space (target_gdbarch ()))
148 free_address_space (this->aspace
);
149 clear_section_table (&this->target_sections
);
150 clear_program_space_solib_cache (this);
151 /* Discard any data modules have associated with the PSPACE. */
152 program_space_free_data (this);
155 /* Copies program space SRC to DEST. Copies the main executable file,
156 and the main symbol file. Returns DEST. */
158 struct program_space
*
159 clone_program_space (struct program_space
*dest
, struct program_space
*src
)
161 scoped_restore_current_program_space restore_pspace
;
163 set_current_program_space (dest
);
165 if (src
->pspace_exec_filename
!= NULL
)
166 exec_file_attach (src
->pspace_exec_filename
, 0);
168 if (src
->symfile_object_file
!= NULL
)
169 symbol_file_add_main (objfile_name (src
->symfile_object_file
),
170 SYMFILE_DEFER_BP_RESET
);
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. */
180 set_current_program_space (struct program_space
*pspace
)
182 if (current_program_space
== pspace
)
185 gdb_assert (pspace
!= NULL
);
187 current_program_space
= pspace
;
189 /* Different symbols change our view of the frame chain. */
190 reinit_frame_cache ();
193 /* Returns true iff there's no inferior bound to PSPACE. */
196 program_space_empty_p (struct program_space
*pspace
)
198 if (find_inferior_for_program_space (pspace
) != NULL
)
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. */
208 delete_program_space (struct program_space
*pspace
)
210 struct program_space
*ss
, **ss_link
;
211 gdb_assert (pspace
!= NULL
);
212 gdb_assert (pspace
!= current_program_space
);
215 ss_link
= &program_spaces
;
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. */
236 print_program_space (struct ui_out
*uiout
, int requested
)
238 struct program_space
*pspace
;
241 /* Compute number of pspaces we will print. */
244 if (requested
!= -1 && pspace
->num
!= requested
)
250 /* There should always be at least one. */
251 gdb_assert (count
> 0);
253 ui_out_emit_table
table_emitter (uiout
, 3, count
, "pspaces");
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 ();
261 struct inferior
*inf
;
264 if (requested
!= -1 && requested
!= pspace
->num
)
267 ui_out_emit_tuple
tuple_emitter (uiout
, NULL
);
269 if (pspace
== current_program_space
)
270 uiout
->field_string ("current", "*");
272 uiout
->field_skip ("current");
274 uiout
->field_int ("id", pspace
->num
);
276 if (pspace
->pspace_exec_filename
)
277 uiout
->field_string ("exec", pspace
->pspace_exec_filename
);
279 uiout
->field_skip ("exec");
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. */
287 for (inf
= inferior_list
; inf
; inf
= inf
->next
)
288 if (inf
->pspace
== pspace
)
293 printf_filtered ("\n\tBound inferiors: ID %d (%s)",
295 target_pid_to_str (pid_to_ptid (inf
->pid
)));
298 printf_filtered (", ID %d (%s)",
300 target_pid_to_str (pid_to_ptid (inf
->pid
)));
307 /* Boolean test for an already-known program space id. */
310 valid_program_space_id (int num
)
312 struct program_space
*pspace
;
315 if (pspace
->num
== num
)
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. */
326 maintenance_info_program_spaces_command (const char *args
, int from_tty
)
332 requested
= parse_and_eval_long (args
);
333 if (!valid_program_space_id (requested
))
334 error (_("program space ID %d not known."), requested
);
337 print_program_space (current_uiout
, requested
);
340 /* Simply returns the count of program spaces. */
343 number_of_program_spaces (void)
345 struct program_space
*pspace
;
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.
362 It is assumed that there are no bound inferiors yet, otherwise,
363 they'd be left with stale referenced to released aspaces. */
366 update_address_spaces (void)
368 int shared_aspace
= gdbarch_has_shared_address_space (target_gdbarch ());
369 struct program_space
*pspace
;
370 struct inferior
*inf
;
372 init_address_spaces ();
376 struct address_space
*aspace
= new_address_space ();
378 free_address_space (current_program_space
->aspace
);
380 pspace
->aspace
= aspace
;
385 free_address_space (pspace
->aspace
);
386 pspace
->aspace
= new_address_space ();
389 for (inf
= inferior_list
; inf
; inf
= inf
->next
)
390 if (gdbarch_has_global_solist (target_gdbarch ()))
391 inf
->aspace
= maybe_new_address_space ();
393 inf
->aspace
= inf
->pspace
->aspace
;
398 /* See progspace.h. */
401 clear_program_space_solib_cache (struct program_space
*pspace
)
403 VEC_free (so_list_ptr
, pspace
->added_solibs
);
405 pspace
->deleted_solibs
.clear ();
411 initialize_progspace (void)
413 add_cmd ("program-spaces", class_maintenance
,
414 maintenance_info_program_spaces_command
,
415 _("Info about currently known program spaces."),
416 &maintenanceinfolist
);
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. */
425 current_program_space
= new program_space (new_address_space ());