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