1 /* Program and address space management, for GDB, the GNU debugger.
3 Copyright (C) 2009-2019 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"
29 /* The last program space number assigned. */
30 int last_program_space_num
= 0;
32 /* The head of the program spaces list. */
33 struct program_space
*program_spaces
;
35 /* Pointer to the current program space. */
36 struct program_space
*current_program_space
;
38 /* The last address space number assigned. */
39 static int highest_address_space_num
;
43 /* Keep a registry of per-program_space data-pointers required by other GDB
46 DEFINE_REGISTRY (program_space
, REGISTRY_ACCESS_FIELD
)
48 /* Keep a registry of per-address_space data-pointers required by other GDB
51 DEFINE_REGISTRY (address_space
, REGISTRY_ACCESS_FIELD
)
55 /* Create a new address space object, and add it to the list. */
57 struct address_space
*
58 new_address_space (void)
60 struct address_space
*aspace
;
62 aspace
= XCNEW (struct address_space
);
63 aspace
->num
= ++highest_address_space_num
;
64 address_space_alloc_data (aspace
);
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. */
73 struct address_space
*
74 maybe_new_address_space (void)
76 int shared_aspace
= gdbarch_has_shared_address_space (target_gdbarch ());
80 /* Just return the first in the list. */
81 return program_spaces
->aspace
;
84 return new_address_space ();
88 free_address_space (struct address_space
*aspace
)
90 address_space_free_data (aspace
);
95 address_space_num (struct address_space
*aspace
)
100 /* Start counting over from scratch. */
103 init_address_spaces (void)
105 highest_address_space_num
= 0;
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. */
113 program_space::program_space (address_space
*aspace_
)
114 : num (++last_program_space_num
), aspace (aspace_
)
116 program_space_alloc_data (this);
118 if (program_spaces
== NULL
)
119 program_spaces
= this;
122 struct program_space
*last
;
124 for (last
= program_spaces
; last
->next
!= NULL
; last
= last
->next
)
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
136 program_space::~program_space ()
138 gdb_assert (this != current_program_space
);
140 scoped_restore_current_program_space restore_pspace
;
142 set_current_program_space (this);
144 breakpoint_program_space_exit (this);
145 no_shared_libraries (NULL
, 0);
147 free_all_objfiles ();
148 if (!gdbarch_has_shared_address_space (target_gdbarch ()))
149 free_address_space (this->aspace
);
150 clear_section_table (&this->target_sections
);
151 clear_program_space_solib_cache (this);
152 /* Discard any data modules have associated with the PSPACE. */
153 program_space_free_data (this);
156 /* See progspace.h. */
159 program_space::add_objfile (struct objfile
*objfile
, struct objfile
*before
)
161 for (struct objfile
**objp
= &objfiles_head
;
163 objp
= &((*objp
)->next
))
167 objfile
->next
= *objp
;
173 internal_error (__FILE__
, __LINE__
,
174 _("put_objfile_before: before objfile not in list"));
178 /* See progspace.h. */
181 program_space::remove_objfile (struct objfile
*objfile
)
183 struct objfile
**objpp
;
185 for (objpp
= &object_files
; *objpp
!= NULL
; objpp
= &((*objpp
)->next
))
187 if (*objpp
== objfile
)
189 *objpp
= (*objpp
)->next
;
190 objfile
->next
= NULL
;
192 if (objfile
== symfile_object_file
)
193 symfile_object_file
= NULL
;
199 internal_error (__FILE__
, __LINE__
,
200 _("remove_objfile: objfile already unlinked"));
203 /* Copies program space SRC to DEST. Copies the main executable file,
204 and the main symbol file. Returns DEST. */
206 struct program_space
*
207 clone_program_space (struct program_space
*dest
, struct program_space
*src
)
209 scoped_restore_current_program_space restore_pspace
;
211 set_current_program_space (dest
);
213 if (src
->pspace_exec_filename
!= NULL
)
214 exec_file_attach (src
->pspace_exec_filename
, 0);
216 if (src
->symfile_object_file
!= NULL
)
217 symbol_file_add_main (objfile_name (src
->symfile_object_file
),
218 SYMFILE_DEFER_BP_RESET
);
223 /* Sets PSPACE as the current program space. It is the caller's
224 responsibility to make sure that the currently selected
225 inferior/thread matches the selected program space. */
228 set_current_program_space (struct program_space
*pspace
)
230 if (current_program_space
== pspace
)
233 gdb_assert (pspace
!= NULL
);
235 current_program_space
= pspace
;
237 /* Different symbols change our view of the frame chain. */
238 reinit_frame_cache ();
241 /* Returns true iff there's no inferior bound to PSPACE. */
244 program_space_empty_p (struct program_space
*pspace
)
246 if (find_inferior_for_program_space (pspace
) != NULL
)
252 /* Remove a program space from the program spaces list and release it. It is
253 an error to call this function while PSPACE is the current program space. */
256 delete_program_space (struct program_space
*pspace
)
258 struct program_space
*ss
, **ss_link
;
259 gdb_assert (pspace
!= NULL
);
260 gdb_assert (pspace
!= current_program_space
);
263 ss_link
= &program_spaces
;
279 /* Prints the list of program spaces and their details on UIOUT. If
280 REQUESTED is not -1, it's the ID of the pspace that should be
281 printed. Otherwise, all spaces are printed. */
284 print_program_space (struct ui_out
*uiout
, int requested
)
286 struct program_space
*pspace
;
289 /* Compute number of pspaces we will print. */
292 if (requested
!= -1 && pspace
->num
!= requested
)
298 /* There should always be at least one. */
299 gdb_assert (count
> 0);
301 ui_out_emit_table
table_emitter (uiout
, 3, count
, "pspaces");
302 uiout
->table_header (1, ui_left
, "current", "");
303 uiout
->table_header (4, ui_left
, "id", "Id");
304 uiout
->table_header (17, ui_left
, "exec", "Executable");
305 uiout
->table_body ();
309 struct inferior
*inf
;
312 if (requested
!= -1 && requested
!= pspace
->num
)
315 ui_out_emit_tuple
tuple_emitter (uiout
, NULL
);
317 if (pspace
== current_program_space
)
318 uiout
->field_string ("current", "*");
320 uiout
->field_skip ("current");
322 uiout
->field_signed ("id", pspace
->num
);
324 if (pspace
->pspace_exec_filename
)
325 uiout
->field_string ("exec", pspace
->pspace_exec_filename
);
327 uiout
->field_skip ("exec");
329 /* Print extra info that doesn't really fit in tabular form.
330 Currently, we print the list of inferiors bound to a pspace.
331 There can be more than one inferior bound to the same pspace,
332 e.g., both parent/child inferiors in a vfork, or, on targets
333 that share pspaces between inferiors. */
335 for (inf
= inferior_list
; inf
; inf
= inf
->next
)
336 if (inf
->pspace
== pspace
)
341 printf_filtered ("\n\tBound inferiors: ID %d (%s)",
343 target_pid_to_str (ptid_t (inf
->pid
)).c_str ());
346 printf_filtered (", ID %d (%s)",
348 target_pid_to_str (ptid_t (inf
->pid
)).c_str ());
355 /* Boolean test for an already-known program space id. */
358 valid_program_space_id (int num
)
360 struct program_space
*pspace
;
363 if (pspace
->num
== num
)
369 /* If ARGS is NULL or empty, print information about all program
370 spaces. Otherwise, ARGS is a text representation of a LONG
371 indicating which the program space to print information about. */
374 maintenance_info_program_spaces_command (const char *args
, int from_tty
)
380 requested
= parse_and_eval_long (args
);
381 if (!valid_program_space_id (requested
))
382 error (_("program space ID %d not known."), requested
);
385 print_program_space (current_uiout
, requested
);
388 /* Simply returns the count of program spaces. */
391 number_of_program_spaces (void)
393 struct program_space
*pspace
;
402 /* Update all program spaces matching to address spaces. The user may
403 have created several program spaces, and loaded executables into
404 them before connecting to the target interface that will create the
405 inferiors. All that happens before GDB has a chance to know if the
406 inferiors will share an address space or not. Call this after
407 having connected to the target interface and having fetched the
408 target description, to fixup the program/address spaces mappings.
410 It is assumed that there are no bound inferiors yet, otherwise,
411 they'd be left with stale referenced to released aspaces. */
414 update_address_spaces (void)
416 int shared_aspace
= gdbarch_has_shared_address_space (target_gdbarch ());
417 struct program_space
*pspace
;
418 struct inferior
*inf
;
420 init_address_spaces ();
424 struct address_space
*aspace
= new_address_space ();
426 free_address_space (current_program_space
->aspace
);
428 pspace
->aspace
= aspace
;
433 free_address_space (pspace
->aspace
);
434 pspace
->aspace
= new_address_space ();
437 for (inf
= inferior_list
; inf
; inf
= inf
->next
)
438 if (gdbarch_has_global_solist (target_gdbarch ()))
439 inf
->aspace
= maybe_new_address_space ();
441 inf
->aspace
= inf
->pspace
->aspace
;
446 /* See progspace.h. */
449 clear_program_space_solib_cache (struct program_space
*pspace
)
451 pspace
->added_solibs
.clear ();
452 pspace
->deleted_solibs
.clear ();
458 initialize_progspace (void)
460 add_cmd ("program-spaces", class_maintenance
,
461 maintenance_info_program_spaces_command
,
462 _("Info about currently known program spaces."),
463 &maintenanceinfolist
);
465 /* There's always one program space. Note that this function isn't
466 an automatic _initialize_foo function, since other
467 _initialize_foo routines may need to install their per-pspace
468 data keys. We can only allocate a progspace when all those
469 modules have done that. Do this before
470 initialize_current_architecture, because that accesses exec_bfd,
471 which in turn dereferences current_program_space. */
472 current_program_space
= new program_space (new_address_space ());