1 /* Program and address space management, for GDB, the GNU debugger.
3 Copyright (C) 2009-2022 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"
27 #include "gdbthread.h"
30 #include "cli/cli-style.h"
32 /* The last program space number assigned. */
33 static int last_program_space_num
= 0;
35 /* The head of the program spaces list. */
36 std::vector
<struct program_space
*> program_spaces
;
38 /* Pointer to the current program space. */
39 struct program_space
*current_program_space
;
41 /* The last address space number assigned. */
42 static int highest_address_space_num
;
46 /* Create a new address space object, and add it to the list. */
48 address_space::address_space ()
49 : m_num (++highest_address_space_num
)
53 /* Maybe create a new address space object, and add it to the list, or
54 return a pointer to an existing address space, in case inferiors
55 share an address space on this target system. */
57 struct address_space
*
58 maybe_new_address_space (void)
60 int shared_aspace
= gdbarch_has_shared_address_space (target_gdbarch ());
64 /* Just return the first in the list. */
65 return program_spaces
[0]->aspace
;
68 return new address_space ();
71 /* Start counting over from scratch. */
74 init_address_spaces (void)
76 highest_address_space_num
= 0;
81 /* Remove a program space from the program spaces list. */
84 remove_program_space (program_space
*pspace
)
86 gdb_assert (pspace
!= NULL
);
88 auto iter
= std::find (program_spaces
.begin (), program_spaces
.end (),
90 gdb_assert (iter
!= program_spaces
.end ());
91 program_spaces
.erase (iter
);
94 /* See progspace.h. */
96 program_space::program_space (address_space
*aspace_
)
97 : num (++last_program_space_num
),
100 program_spaces
.push_back (this);
103 /* See progspace.h. */
105 program_space::~program_space ()
107 gdb_assert (this != current_program_space
);
109 remove_program_space (this);
111 scoped_restore_current_program_space restore_pspace
;
113 set_current_program_space (this);
115 breakpoint_program_space_exit (this);
116 no_shared_libraries (NULL
, 0);
117 free_all_objfiles ();
118 /* Defer breakpoint re-set because we don't want to create new
119 locations for this pspace which we're tearing down. */
120 clear_symtab_users (SYMFILE_DEFER_BP_RESET
);
121 if (!gdbarch_has_shared_address_space (target_gdbarch ()))
125 /* See progspace.h. */
128 program_space::free_all_objfiles ()
130 /* Any objfile reference would become stale. */
131 for (struct so_list
*so
: current_program_space
->solibs ())
132 gdb_assert (so
->objfile
== NULL
);
134 while (!objfiles_list
.empty ())
135 objfiles_list
.front ()->unlink ();
138 /* See progspace.h. */
141 program_space::add_objfile (std::unique_ptr
<objfile
> &&objfile
,
142 struct objfile
*before
)
144 if (before
== nullptr)
145 objfiles_list
.push_back (std::move (objfile
));
148 auto iter
= std::find_if (objfiles_list
.begin (), objfiles_list
.end (),
149 [=] (const std::unique_ptr
<::objfile
> &objf
)
151 return objf
.get () == before
;
153 gdb_assert (iter
!= objfiles_list
.end ());
154 objfiles_list
.insert (iter
, std::move (objfile
));
158 /* See progspace.h. */
161 program_space::remove_objfile (struct objfile
*objfile
)
163 /* Removing an objfile from the objfile list invalidates any frame
164 that was built using frame info found in the objfile. Reinit the
165 frame cache to get rid of any frame that might otherwise
166 reference stale info. */
167 reinit_frame_cache ();
169 auto iter
= std::find_if (objfiles_list
.begin (), objfiles_list
.end (),
170 [=] (const std::unique_ptr
<::objfile
> &objf
)
172 return objf
.get () == objfile
;
174 gdb_assert (iter
!= objfiles_list
.end ());
175 objfiles_list
.erase (iter
);
177 if (objfile
== symfile_object_file
)
178 symfile_object_file
= NULL
;
181 /* See progspace.h. */
184 program_space::exec_close ()
188 /* Removing target sections may close the exec_ops target.
189 Clear ebfd before doing so to prevent recursion. */
190 ebfd
.reset (nullptr);
193 remove_target_sections (&ebfd
);
195 exec_filename
.reset (nullptr);
199 /* Copies program space SRC to DEST. Copies the main executable file,
200 and the main symbol file. Returns DEST. */
202 struct program_space
*
203 clone_program_space (struct program_space
*dest
, struct program_space
*src
)
205 scoped_restore_current_program_space restore_pspace
;
207 set_current_program_space (dest
);
209 if (src
->exec_filename
!= NULL
)
210 exec_file_attach (src
->exec_filename
.get (), 0);
212 if (src
->symfile_object_file
!= NULL
)
213 symbol_file_add_main (objfile_name (src
->symfile_object_file
),
214 SYMFILE_DEFER_BP_RESET
);
219 /* Sets PSPACE as the current program space. It is the caller's
220 responsibility to make sure that the currently selected
221 inferior/thread matches the selected program space. */
224 set_current_program_space (struct program_space
*pspace
)
226 if (current_program_space
== pspace
)
229 gdb_assert (pspace
!= NULL
);
231 current_program_space
= pspace
;
233 /* Different symbols change our view of the frame chain. */
234 reinit_frame_cache ();
237 /* Returns true iff there's no inferior bound to PSPACE. */
240 program_space::empty ()
242 return find_inferior_for_program_space (this) == nullptr;
245 /* Prints the list of program spaces and their details on UIOUT. If
246 REQUESTED is not -1, it's the ID of the pspace that should be
247 printed. Otherwise, all spaces are printed. */
250 print_program_space (struct ui_out
*uiout
, int requested
)
254 /* Start with a minimum width of 17 for the executable name column. */
255 size_t longest_exec_name
= 17;
257 /* Compute number of pspaces we will print. */
258 for (struct program_space
*pspace
: program_spaces
)
260 if (requested
!= -1 && pspace
->num
!= requested
)
263 if (pspace
->exec_filename
!= nullptr)
264 longest_exec_name
= std::max (strlen (pspace
->exec_filename
.get ()),
270 /* There should always be at least one. */
271 gdb_assert (count
> 0);
273 ui_out_emit_table
table_emitter (uiout
, 4, count
, "pspaces");
274 uiout
->table_header (1, ui_left
, "current", "");
275 uiout
->table_header (4, ui_left
, "id", "Id");
276 uiout
->table_header (longest_exec_name
, ui_left
, "exec", "Executable");
277 uiout
->table_header (17, ui_left
, "core", "Core File");
278 uiout
->table_body ();
280 for (struct program_space
*pspace
: program_spaces
)
284 if (requested
!= -1 && requested
!= pspace
->num
)
287 ui_out_emit_tuple
tuple_emitter (uiout
, NULL
);
289 if (pspace
== current_program_space
)
290 uiout
->field_string ("current", "*");
292 uiout
->field_skip ("current");
294 uiout
->field_signed ("id", pspace
->num
);
296 if (pspace
->exec_filename
!= nullptr)
297 uiout
->field_string ("exec", pspace
->exec_filename
.get (),
298 file_name_style
.style ());
300 uiout
->field_skip ("exec");
302 if (pspace
->cbfd
!= nullptr)
303 uiout
->field_string ("core", bfd_get_filename (pspace
->cbfd
.get ()),
304 file_name_style
.style ());
306 uiout
->field_skip ("core");
308 /* Print extra info that doesn't really fit in tabular form.
309 Currently, we print the list of inferiors bound to a pspace.
310 There can be more than one inferior bound to the same pspace,
311 e.g., both parent/child inferiors in a vfork, or, on targets
312 that share pspaces between inferiors. */
315 /* We're going to switch inferiors. */
316 scoped_restore_current_thread restore_thread
;
318 for (inferior
*inf
: all_inferiors ())
319 if (inf
->pspace
== pspace
)
321 /* Switch to inferior in order to call target methods. */
322 switch_to_inferior_no_thread (inf
);
327 gdb_printf ("\n\tBound inferiors: ID %d (%s)",
329 target_pid_to_str (ptid_t (inf
->pid
)).c_str ());
332 gdb_printf (", ID %d (%s)",
334 target_pid_to_str (ptid_t (inf
->pid
)).c_str ());
341 /* Boolean test for an already-known program space id. */
344 valid_program_space_id (int num
)
346 for (struct program_space
*pspace
: program_spaces
)
347 if (pspace
->num
== num
)
353 /* If ARGS is NULL or empty, print information about all program
354 spaces. Otherwise, ARGS is a text representation of a LONG
355 indicating which the program space to print information about. */
358 maintenance_info_program_spaces_command (const char *args
, int from_tty
)
364 requested
= parse_and_eval_long (args
);
365 if (!valid_program_space_id (requested
))
366 error (_("program space ID %d not known."), requested
);
369 print_program_space (current_uiout
, requested
);
372 /* Update all program spaces matching to address spaces. The user may
373 have created several program spaces, and loaded executables into
374 them before connecting to the target interface that will create the
375 inferiors. All that happens before GDB has a chance to know if the
376 inferiors will share an address space or not. Call this after
377 having connected to the target interface and having fetched the
378 target description, to fixup the program/address spaces mappings.
380 It is assumed that there are no bound inferiors yet, otherwise,
381 they'd be left with stale referenced to released aspaces. */
384 update_address_spaces (void)
386 int shared_aspace
= gdbarch_has_shared_address_space (target_gdbarch ());
388 init_address_spaces ();
392 struct address_space
*aspace
= new address_space ();
394 delete current_program_space
->aspace
;
395 for (struct program_space
*pspace
: program_spaces
)
396 pspace
->aspace
= aspace
;
399 for (struct program_space
*pspace
: program_spaces
)
401 delete pspace
->aspace
;
402 pspace
->aspace
= new address_space ();
405 for (inferior
*inf
: all_inferiors ())
406 if (gdbarch_has_global_solist (target_gdbarch ()))
407 inf
->aspace
= maybe_new_address_space ();
409 inf
->aspace
= inf
->pspace
->aspace
;
414 /* See progspace.h. */
417 program_space::clear_solib_cache ()
419 added_solibs
.clear ();
420 deleted_solibs
.clear ();
426 initialize_progspace (void)
428 add_cmd ("program-spaces", class_maintenance
,
429 maintenance_info_program_spaces_command
,
430 _("Info about currently known program spaces."),
431 &maintenanceinfolist
);
433 /* There's always one program space. Note that this function isn't
434 an automatic _initialize_foo function, since other
435 _initialize_foo routines may need to install their per-pspace
436 data keys. We can only allocate a progspace when all those
437 modules have done that. Do this before
438 initialize_current_architecture, because that accesses the ebfd
439 of current_program_space. */
440 current_program_space
= new program_space (new address_space ());