1 /* Variables that describe the inferior process running under GDB:
2 Where it is, why it stopped, and how to step it.
4 Copyright (C) 1986-2014 Free Software Foundation, Inc.
6 This file is part of GDB.
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.
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.
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/>. */
21 #if !defined (INFERIOR_H)
24 struct target_waitstatus;
32 struct target_desc_info;
37 #include "breakpoint.h"
39 /* For enum gdb_signal. */
42 /* For struct frame_id. */
45 #include "progspace.h"
48 struct infcall_suspend_state;
49 struct infcall_control_state;
51 extern struct infcall_suspend_state *save_infcall_suspend_state (void);
52 extern struct infcall_control_state *save_infcall_control_state (void);
54 extern void restore_infcall_suspend_state (struct infcall_suspend_state *);
55 extern void restore_infcall_control_state (struct infcall_control_state *);
57 extern struct cleanup *make_cleanup_restore_infcall_suspend_state
58 (struct infcall_suspend_state *);
59 extern struct cleanup *make_cleanup_restore_infcall_control_state
60 (struct infcall_control_state *);
62 extern void discard_infcall_suspend_state (struct infcall_suspend_state *);
63 extern void discard_infcall_control_state (struct infcall_control_state *);
65 extern struct regcache *
66 get_infcall_suspend_state_regcache (struct infcall_suspend_state *);
68 /* Returns true if PTID matches filter FILTER. FILTER can be the wild
69 card MINUS_ONE_PTID (all ptid match it); can be a ptid representing
70 a process (ptid_is_pid returns true), in which case, all lwps and
71 threads of that given process match, lwps and threads of other
72 processes do not; or, it can represent a specific thread, in which
73 case, only that thread will match true. PTID must represent a
74 specific LWP or THREAD, it can never be a wild card. */
76 extern int ptid_match (ptid_t ptid, ptid_t filter);
78 /* Save value of inferior_ptid so that it may be restored by
79 a later call to do_cleanups(). Returns the struct cleanup
80 pointer needed for later doing the cleanup. */
81 extern struct cleanup * save_inferior_ptid (void);
83 extern void set_sigint_trap (void);
85 extern void clear_sigint_trap (void);
87 /* Set/get file name for default use for standard in/out in the inferior. */
89 extern void set_inferior_io_terminal (const char *terminal_name);
90 extern const char *get_inferior_io_terminal (void);
92 /* Collected pid, tid, etc. of the debugged inferior. When there's
93 no inferior, ptid_get_pid (inferior_ptid) will be 0. */
95 extern ptid_t inferior_ptid;
97 /* Are we simulating synchronous execution? This is used in async gdb
98 to implement the 'run', 'continue' etc commands, which will not
99 redisplay the prompt until the execution is actually over. */
100 extern int sync_execution;
102 /* Inferior environment. */
104 extern void clear_proceed_status (void);
106 extern void proceed (CORE_ADDR, enum gdb_signal, int);
108 extern int sched_multi;
110 /* When set, stop the 'step' command if we enter a function which has
111 no line number information. The normal behavior is that we step
112 over such function. */
113 extern int step_stop_if_no_debug;
115 /* If set, the inferior should be controlled in non-stop mode. In
116 this mode, each thread is controlled independently. Execution
117 commands apply only to the selected thread by default, and stop
118 events stop only the thread that had the event -- the other threads
119 are kept running freely. */
122 /* When set (default), the target should attempt to disable the operating
123 system's address space randomization feature when starting an inferior. */
124 extern int disable_randomization;
126 extern void generic_mourn_inferior (void);
128 extern void terminal_save_ours (void);
130 extern void terminal_ours (void);
132 extern CORE_ADDR unsigned_pointer_to_address (struct gdbarch *gdbarch,
134 const gdb_byte *buf);
135 extern void unsigned_address_to_pointer (struct gdbarch *gdbarch,
136 struct type *type, gdb_byte *buf,
138 extern CORE_ADDR signed_pointer_to_address (struct gdbarch *gdbarch,
140 const gdb_byte *buf);
141 extern void address_to_signed_pointer (struct gdbarch *gdbarch,
142 struct type *type, gdb_byte *buf,
145 extern void wait_for_inferior (void);
147 extern void prepare_for_detach (void);
149 extern void fetch_inferior_event (void *);
151 extern void init_wait_for_inferior (void);
153 extern void reopen_exec_file (void);
155 /* The `resume' routine should only be called in special circumstances.
156 Normally, use `proceed', which handles a lot of bookkeeping. */
158 extern void resume (int, enum gdb_signal);
160 extern ptid_t user_visible_resume_ptid (int step);
162 extern void insert_step_resume_breakpoint_at_sal (struct gdbarch *,
163 struct symtab_and_line ,
166 /* From misc files */
168 extern void default_print_registers_info (struct gdbarch *gdbarch,
169 struct ui_file *file,
170 struct frame_info *frame,
171 int regnum, int all);
173 extern void child_terminal_info (const char *, int);
175 extern void term_info (char *, int);
177 extern void terminal_ours_for_output (void);
179 extern void terminal_inferior (void);
181 extern void terminal_init_inferior (void);
183 extern void terminal_init_inferior_with_pgrp (int pgrp);
185 /* From fork-child.c */
187 extern int fork_inferior (char *, char *, char **,
189 void (*)(int), void (*)(void), char *,
190 void (*)(const char *,
191 char * const *, char * const *));
194 extern void startup_inferior (int);
196 extern char *construct_inferior_arguments (int, char **);
200 extern unsigned int debug_infrun;
202 extern int stop_on_solib_events;
204 extern void start_remote (int from_tty);
206 extern void normal_stop (void);
208 extern int signal_stop_state (int);
210 extern int signal_print_state (int);
212 extern int signal_pass_state (int);
214 extern int signal_stop_update (int, int);
216 extern int signal_print_update (int, int);
218 extern int signal_pass_update (int, int);
220 extern void get_last_target_status(ptid_t *ptid,
221 struct target_waitstatus *status);
223 extern void follow_inferior_reset_breakpoints (void);
225 void set_step_info (struct frame_info *frame, struct symtab_and_line sal);
227 /* Clear the convenience variables associated with the exit of the
228 inferior. Currently, those variables are $_exitcode and
231 extern void clear_exit_convenience_vars (void);
235 extern void post_create_inferior (struct target_ops *, int);
237 extern void attach_command (char *, int);
239 extern char *get_inferior_args (void);
241 extern void set_inferior_args (char *);
243 extern void set_inferior_args_vector (int, char **);
245 extern void registers_info (char *, int);
247 extern void continue_1 (int all_threads);
249 extern void interrupt_target_1 (int all_threads);
251 extern void delete_longjmp_breakpoint_cleanup (void *arg);
253 extern void detach_command (char *, int);
255 extern void notice_new_inferior (ptid_t, int, int);
257 extern struct value *get_return_value (struct value *function,
258 struct type *value_type);
260 /* Whether to start up the debuggee under a shell.
262 If startup-with-shell is set, GDB's "run" will attempt to start up
263 the debuggee under a shell.
265 This is in order for argument-expansion to occur. E.g.,
269 The "*" gets expanded by the shell into a list of files.
271 While this is a nice feature, it may be handy to bypass the shell
272 in some cases. To disable this feature, do "set startup-with-shell
275 The catch-exec traps expected during start-up will be one more if
276 the target is started up with a shell. */
277 extern int startup_with_shell;
279 /* Address at which inferior stopped. */
281 extern CORE_ADDR stop_pc;
283 /* Nonzero if stopped due to completion of a stack dummy routine. */
285 extern enum stop_stack_kind stop_stack_dummy;
287 /* Nonzero if program stopped due to a random (unexpected) signal in
290 extern int stopped_by_random_signal;
292 /* STEP_OVER_ALL means step over all subroutine calls.
293 STEP_OVER_UNDEBUGGABLE means step over calls to undebuggable functions.
294 STEP_OVER_NONE means don't step over any subroutine calls. */
296 enum step_over_calls_kind
300 STEP_OVER_UNDEBUGGABLE
303 /* Anything but NO_STOP_QUIETLY means we expect a trap and the caller
304 will handle it themselves. STOP_QUIETLY is used when running in
305 the shell before the child program has been exec'd and when running
306 through shared library loading. STOP_QUIETLY_REMOTE is used when
307 setting up a remote connection; it is like STOP_QUIETLY_NO_SIGSTOP
308 except that there is no need to hide a signal. */
310 /* It is also used after attach, due to attaching to a process. This
311 is a bit trickier. When doing an attach, the kernel stops the
312 debuggee with a SIGSTOP. On newer GNU/Linux kernels (>= 2.5.61)
313 the handling of SIGSTOP for a ptraced process has changed. Earlier
314 versions of the kernel would ignore these SIGSTOPs, while now
315 SIGSTOP is treated like any other signal, i.e. it is not muffled.
317 If the gdb user does a 'continue' after the 'attach', gdb passes
318 the global variable stop_signal (which stores the signal from the
319 attach, SIGSTOP) to the ptrace(PTRACE_CONT,...) call. This is
320 problematic, because the kernel doesn't ignore such SIGSTOP
321 now. I.e. it is reported back to gdb, which in turn presents it
324 To avoid the problem, we use STOP_QUIETLY_NO_SIGSTOP, which allows
325 gdb to clear the value of stop_signal after the attach, so that it
326 is not passed back down to the kernel. */
333 STOP_QUIETLY_NO_SIGSTOP
336 /* Reverse execution. */
337 enum exec_direction_kind
343 /* The current execution direction. This should only be set to enum
344 exec_direction_kind values. It is only an int to make it
345 compatible with make_cleanup_restore_integer. */
346 extern int execution_direction;
348 /* Save register contents here when executing a "finish" command or are
349 about to pop a stack dummy frame, if-and-only-if proceed_to_finish is set.
350 Thus this contains the return value from the called function (assuming
351 values are returned in a register). */
353 extern struct regcache *stop_registers;
355 /* True if we are debugging displaced stepping. */
356 extern int debug_displaced;
358 /* Dump LEN bytes at BUF in hex to FILE, followed by a newline. */
359 void displaced_step_dump_bytes (struct ui_file *file,
360 const gdb_byte *buf, size_t len);
362 struct displaced_step_closure *get_displaced_step_closure_by_addr (CORE_ADDR addr);
364 /* Possible values for gdbarch_call_dummy_location. */
366 #define AT_ENTRY_POINT 4
368 /* Number of traps that happen between exec'ing the shell to run an
369 inferior and when we finally get to the inferior code, not counting
370 the exec for the shell. This is 1 on most implementations.
371 Overridden in nm.h files. */
372 #if !defined(START_INFERIOR_TRAPS_EXPECTED)
373 #define START_INFERIOR_TRAPS_EXPECTED 1
376 struct private_inferior;
378 /* Inferior process specific part of `struct infcall_control_state'.
380 Inferior thread counterpart is `struct thread_control_state'. */
382 struct inferior_control_state
384 /* See the definition of stop_kind above. */
385 enum stop_kind stop_soon;
388 /* Inferior process specific part of `struct infcall_suspend_state'.
390 Inferior thread counterpart is `struct thread_suspend_state'. */
392 #if 0 /* Currently unused and empty structures are not valid C. */
393 struct inferior_suspend_state
398 /* GDB represents the state of each program execution with an object
399 called an inferior. An inferior typically corresponds to a process
400 but is more general and applies also to targets that do not have a
401 notion of processes. Each run of an executable creates a new
402 inferior, as does each attachment to an existing process.
403 Inferiors have unique internal identifiers that are different from
404 target process ids. Each inferior may in turn have multiple
405 threads running in it. */
409 /* Pointer to next inferior in singly-linked list of inferiors. */
410 struct inferior *next;
412 /* Convenient handle (GDB inferior id). Unique across all
416 /* Actual target inferior id, usually, a process id. This matches
417 the ptid_t.pid member of threads of this inferior. */
419 /* True if the PID was actually faked by GDB. */
422 /* State of GDB control of inferior process execution.
423 See `struct inferior_control_state'. */
424 struct inferior_control_state control;
426 /* State of inferior process to restore after GDB is done with an inferior
427 call. See `struct inferior_suspend_state'. */
428 #if 0 /* Currently unused and empty structures are not valid C. */
429 struct inferior_suspend_state suspend;
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
438 /* The address space bound to this inferior. */
439 struct address_space *aspace;
441 /* The program space bound to this inferior. */
442 struct program_space *pspace;
444 /* The arguments string to use when running. */
447 /* The size of elements in argv. */
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. */
456 /* The name of terminal device to use for I/O. */
459 /* Environment to use for running inferior,
460 in format described in environ.h. */
461 struct gdb_environ *environment;
463 /* Nonzero if this child process was attached rather than
467 /* If this inferior is a vfork child, then this is the pointer to
468 its vfork parent, if GDB is still attached to it. */
469 struct inferior *vfork_parent;
471 /* If this process is a vfork parent, this is the pointer to the
472 child. Since a vfork parent is left frozen by the kernel until
473 the child execs or exits, a process can only have one vfork child
475 struct inferior *vfork_child;
477 /* True if this inferior should be detached when it's vfork sibling
481 /* True if this inferior is a vfork parent waiting for a vfork child
482 not under our control to be done with the shared memory region,
483 either by exiting or execing. */
484 int waiting_for_vfork_done;
486 /* True if we're in the process of detaching from this inferior. */
489 /* What is left to do for an execution command after any thread of
490 this inferior stops. For continuations associated with a
491 specific thread, see `struct thread_info'. */
492 struct continuation *continuations;
494 /* Private data used by the target vector implementation. */
495 struct private_inferior *private;
497 /* HAS_EXIT_CODE is true if the inferior exited with an exit code.
498 In this case, the EXIT_CODE field is also valid. */
502 /* Default flags to pass to the symbol reading functions. These are
503 used whenever a new objfile is created. The valid values come
504 from enum symfile_add_flags. */
507 /* Info about an inferior's target description (if it's fetched; the
508 user supplied description's filename, if any; etc.). */
509 struct target_desc_info *tdesc_info;
511 /* The architecture associated with the inferior through the
512 connection to the target.
514 The architecture vector provides some information that is really
515 a property of the inferior, accessed through a particular target:
516 ptrace operations; the layout of certain RSP packets; the
517 solib_ops vector; etc. To differentiate architecture accesses to
518 per-inferior/target properties from
519 per-thread/per-frame/per-objfile properties, accesses to
520 per-inferior/target properties should be made through
522 struct gdbarch *gdbarch;
524 /* Per inferior data-pointers required by other GDB modules. */
528 /* Keep a registry of per-inferior data-pointers required by other GDB
531 DECLARE_REGISTRY (inferior);
533 /* Create an empty inferior list, or empty the existing one. */
534 extern void init_inferior_list (void);
536 /* Add an inferior to the inferior list, print a message that a new
537 inferior is found, and return the pointer to the new inferior.
538 Caller may use this pointer to initialize the private inferior
540 extern struct inferior *add_inferior (int pid);
542 /* Same as add_inferior, but don't print new inferior notifications to
544 extern struct inferior *add_inferior_silent (int pid);
546 /* Delete an existing inferior list entry, due to inferior exit. */
547 extern void delete_inferior (int pid);
549 extern void delete_inferior_1 (struct inferior *todel, int silent);
551 /* Same as delete_inferior, but don't print new inferior notifications
553 extern void delete_inferior_silent (int pid);
555 /* Delete an existing inferior list entry, due to inferior detaching. */
556 extern void detach_inferior (int pid);
558 extern void exit_inferior (int pid);
560 extern void exit_inferior_silent (int pid);
562 extern void exit_inferior_num_silent (int num);
564 extern void inferior_appeared (struct inferior *inf, int pid);
566 /* Get rid of all inferiors. */
567 extern void discard_all_inferiors (void);
569 /* Translate the integer inferior id (GDB's homegrown id, not the system's)
570 into a "pid" (which may be overloaded with extra inferior information). */
571 extern int gdb_inferior_id_to_pid (int);
573 /* Translate a target 'pid' into the integer inferior id (GDB's
574 homegrown id, not the system's). */
575 extern int pid_to_gdb_inferior_id (int pid);
577 /* Boolean test for an already-known pid. */
578 extern int in_inferior_list (int pid);
580 /* Boolean test for an already-known inferior id (GDB's homegrown id,
581 not the system's). */
582 extern int valid_gdb_inferior_id (int num);
584 /* Search function to lookup an inferior by target 'pid'. */
585 extern struct inferior *find_inferior_pid (int pid);
587 /* Search function to lookup an inferior by GDB 'num'. */
588 extern struct inferior *find_inferior_id (int num);
590 /* Find an inferior bound to PSPACE. */
591 extern struct inferior *
592 find_inferior_for_program_space (struct program_space *pspace);
594 /* Inferior iterator function.
596 Calls a callback function once for each inferior, so long as the
597 callback function returns false. If the callback function returns
598 true, the iteration will end and the current inferior will be
599 returned. This can be useful for implementing a search for a
600 inferior with arbitrary attributes, or for applying some operation
603 It is safe to delete the iterated inferior from the callback. */
604 extern struct inferior *iterate_over_inferiors (int (*) (struct inferior *,
608 /* Returns true if the inferior list is not empty. */
609 extern int have_inferiors (void);
611 /* Returns true if there are any live inferiors in the inferior list
612 (not cores, not executables, real live processes). */
613 extern int have_live_inferiors (void);
615 /* Return a pointer to the current inferior. It is an error to call
616 this if there is no current inferior. */
617 extern struct inferior *current_inferior (void);
619 extern void set_current_inferior (struct inferior *);
621 extern struct cleanup *save_current_inferior (void);
623 /* Traverse all inferiors. */
625 #define ALL_INFERIORS(I) \
626 for ((I) = inferior_list; (I); (I) = (I)->next)
628 extern struct inferior *inferior_list;
630 /* Prune away automatically added inferiors that aren't required
632 extern void prune_inferiors (void);
634 extern int number_of_inferiors (void);
636 extern struct inferior *add_inferior_with_spaces (void);
638 extern void update_observer_mode (void);
640 extern void update_signals_program_target (void);
642 extern void signal_catch_update (const unsigned int *);
644 /* In some circumstances we allow a command to specify a numeric
645 signal. The idea is to keep these circumstances limited so that
646 users (and scripts) develop portable habits. For comparison,
647 POSIX.2 `kill' requires that 1,2,3,6,9,14, and 15 work (and using a
648 numeric signal at all is obsolescent. We are slightly more lenient
649 and allow 1-15 which should match host signal numbers on most
650 systems. Use of symbolic signal names is strongly encouraged. */
652 enum gdb_signal gdb_signal_from_command (int num);
654 #endif /* !defined (INFERIOR_H) */