gdb/inferior.h

   1 /* Variables that describe the inferior process running under GDB:
   2    Where it is, why it stopped, and how to step it.
   3
   4    Copyright (C) 1986-2020 Free Software Foundation, Inc.
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  20
  21 #if !defined (INFERIOR_H)
  22 #define INFERIOR_H 1
  23
  24 struct target_waitstatus;
  25 struct frame_info;
  26 struct ui_file;
  27 struct type;
  28 struct gdbarch;
  29 struct regcache;
  30 struct ui_out;
  31 struct terminal_info;
  32 struct target_desc_info;
  33 struct continuation;
  34 struct inferior;
  35 struct thread_info;
  36
  37 /* For bpstat.  */
  38 #include "breakpoint.h"
  39
  40 /* For enum gdb_signal.  */
  41 #include "target.h"
  42
  43 /* For struct frame_id.  */
  44 #include "frame.h"
  45
  46 /* For gdb_environ.  */
  47 #include "gdbsupport/environ.h"
  48
  49 #include "progspace.h"
  50 #include "registry.h"
  51
  52 #include "symfile-add-flags.h"
  53 #include "gdbsupport/refcounted-object.h"
  54 #include "gdbsupport/forward-scope-exit.h"
  55
  56 #include "gdbsupport/common-inferior.h"
  57 #include "gdbthread.h"
  58
  59 #include "process-stratum-target.h"
  60
  61 struct infcall_suspend_state;
  62 struct infcall_control_state;
  63
  64 extern void restore_infcall_suspend_state (struct infcall_suspend_state *);
  65 extern void restore_infcall_control_state (struct infcall_control_state *);
  66
  67 /* A deleter for infcall_suspend_state that calls
  68    restore_infcall_suspend_state.  */
  69 struct infcall_suspend_state_deleter
  70 {
  71   void operator() (struct infcall_suspend_state *state) const
  72   {
  73     try
  74       {
  75         restore_infcall_suspend_state (state);
  76       }
  77     catch (const gdb_exception_error &e)
  78       {
  79         /* If we are restoring the inferior state due to an exception,
  80            some error message will be printed.  So, only warn the user
  81            when we cannot restore during normal execution.  */
  82         if (!std::uncaught_exception ())
  83           warning (_("Failed to restore inferior state: %s"), e.what ());
  84       }
  85   }
  86 };
  87
  88 /* A unique_ptr specialization for infcall_suspend_state.  */
  89 typedef std::unique_ptr<infcall_suspend_state, infcall_suspend_state_deleter>
  90     infcall_suspend_state_up;
  91
  92 extern infcall_suspend_state_up save_infcall_suspend_state ();
  93
  94 /* A deleter for infcall_control_state that calls
  95    restore_infcall_control_state.  */
  96 struct infcall_control_state_deleter
  97 {
  98   void operator() (struct infcall_control_state *state) const
  99   {
 100     restore_infcall_control_state (state);
 101   }
 102 };
 103
 104 /* A unique_ptr specialization for infcall_control_state.  */
 105 typedef std::unique_ptr<infcall_control_state, infcall_control_state_deleter>
 106     infcall_control_state_up;
 107
 108 extern infcall_control_state_up save_infcall_control_state ();
 109
 110 extern void discard_infcall_suspend_state (struct infcall_suspend_state *);
 111 extern void discard_infcall_control_state (struct infcall_control_state *);
 112
 113 extern readonly_detached_regcache *
 114   get_infcall_suspend_state_regcache (struct infcall_suspend_state *);
 115
 116 extern void set_sigint_trap (void);
 117
 118 extern void clear_sigint_trap (void);
 119
 120 /* Set/get file name for default use for standard in/out in the inferior.  */
 121
 122 extern void set_inferior_io_terminal (const char *terminal_name);
 123 extern const char *get_inferior_io_terminal (void);
 124
 125 /* Collected pid, tid, etc. of the debugged inferior.  When there's
 126    no inferior, inferior_ptid.pid () will be 0.  */
 127
 128 extern ptid_t inferior_ptid;
 129
 130 extern void generic_mourn_inferior (void);
 131
 132 extern CORE_ADDR unsigned_pointer_to_address (struct gdbarch *gdbarch,
 133                                               struct type *type,
 134                                               const gdb_byte *buf);
 135 extern void unsigned_address_to_pointer (struct gdbarch *gdbarch,
 136                                          struct type *type, gdb_byte *buf,
 137                                          CORE_ADDR addr);
 138 extern CORE_ADDR signed_pointer_to_address (struct gdbarch *gdbarch,
 139                                             struct type *type,
 140                                             const gdb_byte *buf);
 141 extern void address_to_signed_pointer (struct gdbarch *gdbarch,
 142                                        struct type *type, gdb_byte *buf,
 143                                        CORE_ADDR addr);
 144
 145 extern void reopen_exec_file (void);
 146
 147 /* From misc files */
 148
 149 extern void default_print_registers_info (struct gdbarch *gdbarch,
 150                                           struct ui_file *file,
 151                                           struct frame_info *frame,
 152                                           int regnum, int all);
 153
 154 /* Default implementation of gdbarch_print_float_info.  Print
 155    the values of all floating point registers.  */
 156
 157 extern void default_print_float_info (struct gdbarch *gdbarch,
 158                                       struct ui_file *file,
 159                                       struct frame_info *frame,
 160                                       const char *args);
 161
 162 extern void child_terminal_info (struct target_ops *self, const char *, int);
 163
 164 extern void child_terminal_ours (struct target_ops *self);
 165
 166 extern void child_terminal_ours_for_output (struct target_ops *self);
 167
 168 extern void child_terminal_inferior (struct target_ops *self);
 169
 170 extern void child_terminal_save_inferior (struct target_ops *self);
 171
 172 extern void child_terminal_init (struct target_ops *self);
 173
 174 extern void child_terminal_init_with_pgrp (int pgrp);
 175
 176 extern void child_pass_ctrlc (struct target_ops *self);
 177
 178 extern void child_interrupt (struct target_ops *self);
 179
 180 /* From fork-child.c */
 181
 182 /* Helper function to call STARTUP_INFERIOR with PID and NUM_TRAPS.
 183    This function already calls set_executing.  Return the ptid_t from
 184    STARTUP_INFERIOR.  */
 185 extern ptid_t gdb_startup_inferior (pid_t pid, int num_traps);
 186
 187 extern char *construct_inferior_arguments (int, char **);
 188
 189 /* From infcmd.c */
 190
 191 /* Initial inferior setup.  Determines the exec file is not yet known,
 192    takes any necessary post-attaching actions, fetches the target
 193    description and syncs the shared library list.  */
 194
 195 extern void setup_inferior (int from_tty);
 196
 197 extern void post_create_inferior (struct target_ops *, int);
 198
 199 extern void attach_command (const char *, int);
 200
 201 extern const char *get_inferior_args (void);
 202
 203 extern void set_inferior_args (const char *);
 204
 205 extern void set_inferior_args_vector (int, char **);
 206
 207 extern void registers_info (const char *, int);
 208
 209 extern void continue_1 (int all_threads);
 210
 211 extern void interrupt_target_1 (bool all_threads);
 212
 213 using delete_longjmp_breakpoint_cleanup
 214   = FORWARD_SCOPE_EXIT (delete_longjmp_breakpoint);
 215
 216 extern void detach_command (const char *, int);
 217
 218 extern void notice_new_inferior (struct thread_info *, int, int);
 219
 220 extern struct value *get_return_value (struct value *function,
 221                                        struct type *value_type);
 222
 223 /* Prepare for execution command.  TARGET is the target that will run
 224    the command.  BACKGROUND determines whether this is a foreground
 225    (synchronous) or background (asynchronous) command.  */
 226
 227 extern void prepare_execution_command (struct target_ops *target,
 228                                        int background);
 229
 230 /* Nonzero if stopped due to completion of a stack dummy routine.  */
 231
 232 extern enum stop_stack_kind stop_stack_dummy;
 233
 234 /* Nonzero if program stopped due to a random (unexpected) signal in
 235    inferior process.  */
 236
 237 extern int stopped_by_random_signal;
 238
 239 /* Print notices on inferior events (attach, detach, etc.), set with
 240    `set print inferior-events'.  */
 241 extern bool print_inferior_events;
 242
 243 /* Anything but NO_STOP_QUIETLY means we expect a trap and the caller
 244    will handle it themselves.  STOP_QUIETLY is used when running in
 245    the shell before the child program has been exec'd and when running
 246    through shared library loading.  STOP_QUIETLY_REMOTE is used when
 247    setting up a remote connection; it is like STOP_QUIETLY_NO_SIGSTOP
 248    except that there is no need to hide a signal.  */
 249
 250 /* STOP_QUIETLY_NO_SIGSTOP is used to handle a tricky situation with attach.
 251    When doing an attach, the kernel stops the debuggee with a SIGSTOP.
 252    On newer GNU/Linux kernels (>= 2.5.61) the handling of SIGSTOP for
 253    a ptraced process has changed.  Earlier versions of the kernel
 254    would ignore these SIGSTOPs, while now SIGSTOP is treated like any
 255    other signal, i.e. it is not muffled.
 256
 257    If the gdb user does a 'continue' after the 'attach', gdb passes
 258    the global variable stop_signal (which stores the signal from the
 259    attach, SIGSTOP) to the ptrace(PTRACE_CONT,...)  call.  This is
 260    problematic, because the kernel doesn't ignore such SIGSTOP
 261    now.  I.e. it is reported back to gdb, which in turn presents it
 262    back to the user.
 263
 264    To avoid the problem, we use STOP_QUIETLY_NO_SIGSTOP, which allows
 265    gdb to clear the value of stop_signal after the attach, so that it
 266    is not passed back down to the kernel.  */
 267
 268 enum stop_kind
 269   {
 270     NO_STOP_QUIETLY = 0,
 271     STOP_QUIETLY,
 272     STOP_QUIETLY_REMOTE,
 273     STOP_QUIETLY_NO_SIGSTOP
 274   };
 275
 276 \f
 277 /* Possible values for gdbarch_call_dummy_location.  */
 278 #define ON_STACK 1
 279 #define AT_ENTRY_POINT 4
 280
 281 /* Base class for target-specific inferior data.  */
 282
 283 struct private_inferior
 284 {
 285   virtual ~private_inferior () = 0;
 286 };
 287
 288 /* Inferior process specific part of `struct infcall_control_state'.
 289
 290    Inferior thread counterpart is `struct thread_control_state'.  */
 291
 292 struct inferior_control_state
 293 {
 294   inferior_control_state ()
 295     : stop_soon (NO_STOP_QUIETLY)
 296   {
 297   }
 298
 299   explicit inferior_control_state (enum stop_kind when)
 300     : stop_soon (when)
 301   {
 302   }
 303
 304   /* See the definition of stop_kind above.  */
 305   enum stop_kind stop_soon;
 306 };
 307
 308 /* Return a pointer to the current inferior.  */
 309 extern inferior *current_inferior ();
 310
 311 extern void set_current_inferior (inferior *);
 312
 313 /* Switch inferior (and program space) to INF, and switch to no thread
 314    selected.  */
 315 extern void switch_to_inferior_no_thread (inferior *inf);
 316
 317 /* GDB represents the state of each program execution with an object
 318    called an inferior.  An inferior typically corresponds to a process
 319    but is more general and applies also to targets that do not have a
 320    notion of processes.  Each run of an executable creates a new
 321    inferior, as does each attachment to an existing process.
 322    Inferiors have unique internal identifiers that are different from
 323    target process ids.  Each inferior may in turn have multiple
 324    threads running in it.
 325
 326    Inferiors are intrusively refcounted objects.  Unlike thread
 327    objects, being the user-selected inferior is considered a strong
 328    reference and is thus accounted for in the inferior object's
 329    refcount (see set_current_inferior).  When GDB needs to remember
 330    the selected inferior to later restore it, GDB temporarily bumps
 331    the inferior object's refcount, to prevent something deleting the
 332    inferior object before reverting back (e.g., due to a
 333    "remove-inferiors" command (see
 334    scoped_restore_current_inferior).  All other inferior
 335    references are considered weak references.  Inferiors are always
 336    listed exactly once in the inferior list, so placing an inferior in
 337    the inferior list is an implicit, not counted strong reference.  */
 338
 339 class inferior : public refcounted_object
 340 {
 341 public:
 342   explicit inferior (int pid);
 343   ~inferior ();
 344
 345   /* Returns true if we can delete this inferior.  */
 346   bool deletable () const { return refcount () == 0; }
 347
 348   /* Push T in this inferior's target stack.  */
 349   void push_target (struct target_ops *t)
 350   { m_target_stack.push (t); }
 351
 352   /* Unpush T from this inferior's target stack.  */
 353   int unpush_target (struct target_ops *t)
 354   { return m_target_stack.unpush (t); }
 355
 356   /* Returns true if T is pushed in this inferior's target stack.  */
 357   bool target_is_pushed (target_ops *t)
 358   { return m_target_stack.is_pushed (t); }
 359
 360   /* Find the target beneath T in this inferior's target stack.  */
 361   target_ops *find_target_beneath (const target_ops *t)
 362   { return m_target_stack.find_beneath (t); }
 363
 364   /* Return the target at the top of this inferior's target stack.  */
 365   target_ops *top_target ()
 366   { return m_target_stack.top (); }
 367
 368   /* Return the target at process_stratum level in this inferior's
 369      target stack.  */
 370   struct process_stratum_target *process_target ()
 371   { return (process_stratum_target *) m_target_stack.at (process_stratum); }
 372
 373   /* Return the target at STRATUM in this inferior's target stack.  */
 374   target_ops *target_at (enum strata stratum)
 375   { return m_target_stack.at (stratum); }
 376
 377   bool has_execution ()
 378   { return target_has_execution_1 (this); }
 379
 380   /* Pointer to next inferior in singly-linked list of inferiors.  */
 381   struct inferior *next = NULL;
 382
 383   /* This inferior's thread list.  */
 384   thread_info *thread_list = nullptr;
 385
 386   /* Returns a range adapter covering the inferior's threads,
 387      including exited threads.  Used like this:
 388
 389        for (thread_info *thr : inf->threads ())
 390          { .... }
 391   */
 392   inf_threads_range threads ()
 393   { return inf_threads_range (this->thread_list); }
 394
 395   /* Returns a range adapter covering the inferior's non-exited
 396      threads.  Used like this:
 397
 398        for (thread_info *thr : inf->non_exited_threads ())
 399          { .... }
 400   */
 401   inf_non_exited_threads_range non_exited_threads ()
 402   { return inf_non_exited_threads_range (this->thread_list); }
 403
 404   /* Like inferior::threads(), but returns a range adapter that can be
 405      used with range-for, safely.  I.e., it is safe to delete the
 406      currently-iterated thread, like this:
 407
 408      for (thread_info *t : inf->threads_safe ())
 409        if (some_condition ())
 410          delete f;
 411   */
 412   inline safe_inf_threads_range threads_safe ()
 413   { return safe_inf_threads_range (this->thread_list); }
 414
 415   /* Convenient handle (GDB inferior id).  Unique across all
 416      inferiors.  */
 417   int num = 0;
 418
 419   /* Actual target inferior id, usually, a process id.  This matches
 420      the ptid_t.pid member of threads of this inferior.  */
 421   int pid = 0;
 422   /* True if the PID was actually faked by GDB.  */
 423   bool fake_pid_p = false;
 424
 425   /* The highest thread number this inferior ever had.  */
 426   int highest_thread_num = 0;
 427
 428   /* State of GDB control of inferior process execution.
 429      See `struct inferior_control_state'.  */
 430   inferior_control_state control;
 431
 432   /* True if this was an auto-created inferior, e.g. created from
 433      following a fork; false, if this inferior was manually added by
 434      the user, and we should not attempt to prune it
 435      automatically.  */
 436   bool removable = false;
 437
 438   /* The address space bound to this inferior.  */
 439   struct address_space *aspace = NULL;
 440
 441   /* The program space bound to this inferior.  */
 442   struct program_space *pspace = NULL;
 443
 444   /* The arguments string to use when running.  */
 445   char *args = NULL;
 446
 447   /* The size of elements in argv.  */
 448   int argc = 0;
 449
 450   /* The vector version of arguments.  If ARGC is nonzero,
 451      then we must compute ARGS from this (via the target).
 452      This is always coming from main's argv and therefore
 453      should never be freed.  */
 454   char **argv = NULL;
 455
 456   /* The current working directory that will be used when starting
 457      this inferior.  */
 458   gdb::unique_xmalloc_ptr<char> cwd;
 459
 460   /* The name of terminal device to use for I/O.  */
 461   char *terminal = NULL;
 462
 463   /* The terminal state as set by the last target_terminal::terminal_*
 464      call.  */
 465   target_terminal_state terminal_state = target_terminal_state::is_ours;
 466
 467   /* Environment to use for running inferior,
 468      in format described in environ.h.  */
 469   gdb_environ environment;
 470
 471   /* True if this child process was attached rather than forked.  */
 472   bool attach_flag = false;
 473
 474   /* If this inferior is a vfork child, then this is the pointer to
 475      its vfork parent, if GDB is still attached to it.  */
 476   inferior *vfork_parent = NULL;
 477
 478   /* If this process is a vfork parent, this is the pointer to the
 479      child.  Since a vfork parent is left frozen by the kernel until
 480      the child execs or exits, a process can only have one vfork child
 481      at a given time.  */
 482   inferior *vfork_child = NULL;
 483
 484   /* True if this inferior should be detached when it's vfork sibling
 485      exits or execs.  */
 486   bool pending_detach = false;
 487
 488   /* True if this inferior is a vfork parent waiting for a vfork child
 489      not under our control to be done with the shared memory region,
 490      either by exiting or execing.  */
 491   bool waiting_for_vfork_done = false;
 492
 493   /* True if we're in the process of detaching from this inferior.  */
 494   bool detaching = false;
 495
 496   /* What is left to do for an execution command after any thread of
 497      this inferior stops.  For continuations associated with a
 498      specific thread, see `struct thread_info'.  */
 499   continuation *continuations = NULL;
 500
 501   /* True if setup_inferior wasn't called for this inferior yet.
 502      Until that is done, we must not access inferior memory or
 503      registers, as we haven't determined the target
 504      architecture/description.  */
 505   bool needs_setup = false;
 506
 507   /* Private data used by the target vector implementation.  */
 508   std::unique_ptr<private_inferior> priv;
 509
 510   /* HAS_EXIT_CODE is true if the inferior exited with an exit code.
 511      In this case, the EXIT_CODE field is also valid.  */
 512   bool has_exit_code = false;
 513   LONGEST exit_code = 0;
 514
 515   /* Default flags to pass to the symbol reading functions.  These are
 516      used whenever a new objfile is created.  */
 517   symfile_add_flags symfile_flags = 0;
 518
 519   /* Info about an inferior's target description (if it's fetched; the
 520      user supplied description's filename, if any; etc.).  */
 521   target_desc_info *tdesc_info = NULL;
 522
 523   /* The architecture associated with the inferior through the
 524      connection to the target.
 525
 526      The architecture vector provides some information that is really
 527      a property of the inferior, accessed through a particular target:
 528      ptrace operations; the layout of certain RSP packets; the
 529      solib_ops vector; etc.  To differentiate architecture accesses to
 530      per-inferior/target properties from
 531      per-thread/per-frame/per-objfile properties, accesses to
 532      per-inferior/target properties should be made through
 533      this gdbarch.  */
 534   struct gdbarch *gdbarch = NULL;
 535
 536   /* Data related to displaced stepping.  */
 537   displaced_step_inferior_state displaced_step_state;
 538
 539   /* Per inferior data-pointers required by other GDB modules.  */
 540   REGISTRY_FIELDS;
 541
 542 private:
 543   /* The inferior's target stack.  */
 544   target_stack m_target_stack;
 545 };
 546
 547 /* Keep a registry of per-inferior data-pointers required by other GDB
 548    modules.  */
 549
 550 DECLARE_REGISTRY (inferior);
 551
 552 /* Add an inferior to the inferior list, print a message that a new
 553    inferior is found, and return the pointer to the new inferior.
 554    Caller may use this pointer to initialize the private inferior
 555    data.  */
 556 extern struct inferior *add_inferior (int pid);
 557
 558 /* Same as add_inferior, but don't print new inferior notifications to
 559    the CLI.  */
 560 extern struct inferior *add_inferior_silent (int pid);
 561
 562 extern void delete_inferior (struct inferior *todel);
 563
 564 /* Delete an existing inferior list entry, due to inferior detaching.  */
 565 extern void detach_inferior (inferior *inf);
 566
 567 extern void exit_inferior (inferior *inf);
 568
 569 extern void exit_inferior_silent (inferior *inf);
 570
 571 extern void exit_inferior_num_silent (int num);
 572
 573 extern void inferior_appeared (struct inferior *inf, int pid);
 574
 575 /* Search function to lookup an inferior of TARG by target 'pid'.  */
 576 extern struct inferior *find_inferior_pid (process_stratum_target *targ,
 577                                            int pid);
 578
 579 /* Search function to lookup an inferior of TARG whose pid is equal to
 580    'ptid.pid'. */
 581 extern struct inferior *find_inferior_ptid (process_stratum_target *targ,
 582                                             ptid_t ptid);
 583
 584 /* Search function to lookup an inferior by GDB 'num'.  */
 585 extern struct inferior *find_inferior_id (int num);
 586
 587 /* Find an inferior bound to PSPACE, giving preference to the current
 588    inferior.  */
 589 extern struct inferior *
 590   find_inferior_for_program_space (struct program_space *pspace);
 591
 592 /* Inferior iterator function.
 593
 594    Calls a callback function once for each inferior, so long as the
 595    callback function returns false.  If the callback function returns
 596    true, the iteration will end and the current inferior will be
 597    returned.  This can be useful for implementing a search for a
 598    inferior with arbitrary attributes, or for applying some operation
 599    to every inferior.
 600
 601    It is safe to delete the iterated inferior from the callback.  */
 602 extern struct inferior *iterate_over_inferiors (int (*) (struct inferior *,
 603                                                          void *),
 604                                                 void *);
 605
 606 /* Returns true if the inferior list is not empty.  */
 607 extern int have_inferiors (void);
 608
 609 /* Returns the number of live inferiors running on PROC_TARGET (real
 610    live processes with execution).  */
 611 extern int number_of_live_inferiors (process_stratum_target *proc_target);
 612
 613 /* Returns true if there are any live inferiors in the inferior list
 614    (not cores, not executables, real live processes).  */
 615 extern int have_live_inferiors (void);
 616
 617 /* Save/restore the current inferior.  */
 618
 619 class scoped_restore_current_inferior
 620 {
 621 public:
 622   scoped_restore_current_inferior ()
 623     : m_saved_inf (current_inferior ())
 624   {}
 625
 626   ~scoped_restore_current_inferior ()
 627   { set_current_inferior (m_saved_inf); }
 628
 629   DISABLE_COPY_AND_ASSIGN (scoped_restore_current_inferior);
 630
 631 private:
 632   inferior *m_saved_inf;
 633 };
 634
 635
 636 /* Traverse all inferiors.  */
 637
 638 extern struct inferior *inferior_list;
 639
 640 /* Pull in the internals of the inferiors ranges and iterators.  Must
 641    be done after struct inferior is defined.  */
 642 #include "inferior-iter.h"
 643
 644 /* Return a range that can be used to walk over all inferiors
 645    inferiors, with range-for, safely.  I.e., it is safe to delete the
 646    currently-iterated inferior.  When combined with range-for, this
 647    allow convenient patterns like this:
 648
 649      for (inferior *inf : all_inferiors_safe ())
 650        if (some_condition ())
 651          delete inf;
 652 */
 653
 654 inline all_inferiors_safe_range
 655 all_inferiors_safe ()
 656 {
 657   return {};
 658 }
 659
 660 /* Returns a range representing all inferiors, suitable to use with
 661    range-for, like this:
 662
 663    for (inferior *inf : all_inferiors ())
 664      [...]
 665 */
 666
 667 inline all_inferiors_range
 668 all_inferiors (process_stratum_target *proc_target = nullptr)
 669 {
 670   return all_inferiors_range (proc_target);
 671 }
 672
 673 /* Return a range that can be used to walk over all inferiors with PID
 674    not zero, with range-for.  */
 675
 676 inline all_non_exited_inferiors_range
 677 all_non_exited_inferiors (process_stratum_target *proc_target = nullptr)
 678 {
 679   return all_non_exited_inferiors_range (proc_target);
 680 }
 681
 682 /* Prune away automatically added inferiors that aren't required
 683    anymore.  */
 684 extern void prune_inferiors (void);
 685
 686 extern int number_of_inferiors (void);
 687
 688 extern struct inferior *add_inferior_with_spaces (void);
 689
 690 /* Print the current selected inferior.  */
 691 extern void print_selected_inferior (struct ui_out *uiout);
 692
 693 #endif /* !defined (INFERIOR_H) */