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, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996,
5 1998, 1999, 2000, 2001, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010,
6 2011 Free Software Foundation, Inc.
8 This file is part of GDB.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>. */
23 #if !defined (INFERIOR_H)
26 struct target_waitstatus;
38 #include "breakpoint.h"
40 /* For enum target_signal. */
43 /* For struct frame_id. */
46 #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, PIDGET (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 target_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 /* If set (default), when following a fork, GDB will detach from one
123 the fork branches, child or parent. Exactly which branch is
124 detached depends on 'set follow-fork-mode' setting. */
125 extern int detach_fork;
127 /* When set (default), the target should attempt to disable the operating
128 system's address space randomization feature when starting an inferior. */
129 extern int disable_randomization;
131 extern void generic_mourn_inferior (void);
133 extern void terminal_save_ours (void);
135 extern void terminal_ours (void);
137 extern CORE_ADDR unsigned_pointer_to_address (struct gdbarch *gdbarch,
139 const gdb_byte *buf);
140 extern void unsigned_address_to_pointer (struct gdbarch *gdbarch,
141 struct type *type, gdb_byte *buf,
143 extern CORE_ADDR signed_pointer_to_address (struct gdbarch *gdbarch,
145 const gdb_byte *buf);
146 extern void address_to_signed_pointer (struct gdbarch *gdbarch,
147 struct type *type, gdb_byte *buf,
150 extern void wait_for_inferior (void);
152 extern void prepare_for_detach (void);
154 extern void fetch_inferior_event (void *);
156 extern void init_wait_for_inferior (void);
158 extern void close_exec_file (void);
160 extern void reopen_exec_file (void);
162 /* The `resume' routine should only be called in special circumstances.
163 Normally, use `proceed', which handles a lot of bookkeeping. */
165 extern void resume (int, enum target_signal);
167 extern ptid_t user_visible_resume_ptid (int step);
169 extern void insert_step_resume_breakpoint_at_sal (struct gdbarch *,
170 struct symtab_and_line ,
173 /* From misc files */
175 extern void default_print_registers_info (struct gdbarch *gdbarch,
176 struct ui_file *file,
177 struct frame_info *frame,
178 int regnum, int all);
180 extern void child_terminal_info (char *, int);
182 extern void term_info (char *, int);
184 extern void terminal_ours_for_output (void);
186 extern void terminal_inferior (void);
188 extern void terminal_init_inferior (void);
190 extern void terminal_init_inferior_with_pgrp (int pgrp);
192 /* From fork-child.c */
194 extern int fork_inferior (char *, char *, char **,
196 void (*)(int), void (*)(void), char *,
197 void (*)(const char *,
198 char * const *, char * const *));
201 extern void startup_inferior (int);
203 extern char *construct_inferior_arguments (int, char **);
207 extern int debug_infrun;
209 extern int stop_on_solib_events;
211 extern void start_remote (int from_tty);
213 extern void normal_stop (void);
215 extern int signal_stop_state (int);
217 extern int signal_print_state (int);
219 extern int signal_pass_state (int);
221 extern int signal_stop_update (int, int);
223 extern int signal_print_update (int, int);
225 extern int signal_pass_update (int, int);
227 extern void get_last_target_status(ptid_t *ptid,
228 struct target_waitstatus *status);
230 extern void follow_inferior_reset_breakpoints (void);
232 /* Throw an error indicating the current thread is running. */
233 extern void error_is_running (void);
235 /* Calls error_is_running if the current thread is running. */
236 extern void ensure_not_running (void);
238 void set_step_info (struct frame_info *frame, struct symtab_and_line sal);
242 extern void post_create_inferior (struct target_ops *, int);
244 extern void attach_command (char *, int);
246 extern char *get_inferior_args (void);
248 extern void set_inferior_args (char *);
250 extern void set_inferior_args_vector (int, char **);
252 extern void registers_info (char *, int);
254 extern void nexti_command (char *, int);
256 extern void stepi_command (char *, int);
258 extern void continue_1 (int all_threads);
260 extern void continue_command (char *, int);
262 extern void interrupt_target_command (char *args, int from_tty);
264 extern void interrupt_target_1 (int all_threads);
266 extern void delete_longjmp_breakpoint_cleanup (void *arg);
268 extern void detach_command (char *, int);
270 extern void notice_new_inferior (ptid_t, int, int);
272 extern struct value *get_return_value (struct type *func_type,
273 struct type *value_type);
275 /* Address at which inferior stopped. */
277 extern CORE_ADDR stop_pc;
279 /* Nonzero if stopped due to completion of a stack dummy routine. */
281 extern enum stop_stack_kind stop_stack_dummy;
283 /* Nonzero if program stopped due to a random (unexpected) signal in
286 extern int stopped_by_random_signal;
288 /* STEP_OVER_ALL means step over all subroutine calls.
289 STEP_OVER_UNDEBUGGABLE means step over calls to undebuggable functions.
290 STEP_OVER_NONE means don't step over any subroutine calls. */
292 enum step_over_calls_kind
296 STEP_OVER_UNDEBUGGABLE
299 /* Anything but NO_STOP_QUIETLY means we expect a trap and the caller
300 will handle it themselves. STOP_QUIETLY is used when running in
301 the shell before the child program has been exec'd and when running
302 through shared library loading. STOP_QUIETLY_REMOTE is used when
303 setting up a remote connection; it is like STOP_QUIETLY_NO_SIGSTOP
304 except that there is no need to hide a signal. */
306 /* It is also used after attach, due to attaching to a process. This
307 is a bit trickier. When doing an attach, the kernel stops the
308 debuggee with a SIGSTOP. On newer GNU/Linux kernels (>= 2.5.61)
309 the handling of SIGSTOP for a ptraced process has changed. Earlier
310 versions of the kernel would ignore these SIGSTOPs, while now
311 SIGSTOP is treated like any other signal, i.e. it is not muffled.
313 If the gdb user does a 'continue' after the 'attach', gdb passes
314 the global variable stop_signal (which stores the signal from the
315 attach, SIGSTOP) to the ptrace(PTRACE_CONT,...) call. This is
316 problematic, because the kernel doesn't ignore such SIGSTOP
317 now. I.e. it is reported back to gdb, which in turn presents it
320 To avoid the problem, we use STOP_QUIETLY_NO_SIGSTOP, which allows
321 gdb to clear the value of stop_signal after the attach, so that it
322 is not passed back down to the kernel. */
329 STOP_QUIETLY_NO_SIGSTOP
332 /* Reverse execution. */
333 enum exec_direction_kind
339 /* The current execution direction. This should only be set to enum
340 exec_direction_kind values. It is only an int to make it
341 compatible with make_cleanup_restore_integer. */
342 extern int execution_direction;
344 /* Save register contents here when executing a "finish" command or are
345 about to pop a stack dummy frame, if-and-only-if proceed_to_finish is set.
346 Thus this contains the return value from the called function (assuming
347 values are returned in a register). */
349 extern struct regcache *stop_registers;
351 /* True if we are debugging displaced stepping. */
352 extern int debug_displaced;
354 /* Dump LEN bytes at BUF in hex to FILE, followed by a newline. */
355 void displaced_step_dump_bytes (struct ui_file *file,
356 const gdb_byte *buf, size_t len);
358 struct displaced_step_closure *get_displaced_step_closure_by_addr (CORE_ADDR addr);
360 /* Possible values for gdbarch_call_dummy_location. */
362 #define AT_ENTRY_POINT 4
365 /* If STARTUP_WITH_SHELL is set, GDB's "run"
366 will attempts to start up the debugee under a shell.
367 This is in order for argument-expansion to occur. E.g.,
369 The "*" gets expanded by the shell into a list of files.
370 While this is a nice feature, it turns out to interact badly
371 with some of the catch-fork/catch-exec features we have added.
372 In particular, if the shell does any fork/exec's before
373 the exec of the target program, that can confuse GDB.
374 To disable this feature, set STARTUP_WITH_SHELL to 0.
375 To enable this feature, set STARTUP_WITH_SHELL to 1.
376 The catch-exec traps expected during start-up will
377 be 1 if target is not started up with a shell, 2 if it is.
379 If you disable this, you need to decrement
380 START_INFERIOR_TRAPS_EXPECTED in tm.h. */
381 #define STARTUP_WITH_SHELL 1
382 #if !defined(START_INFERIOR_TRAPS_EXPECTED)
383 #define START_INFERIOR_TRAPS_EXPECTED 2
386 struct private_inferior;
388 /* Inferior process specific part of `struct infcall_control_state'.
390 Inferior thread counterpart is `struct thread_control_state'. */
392 struct inferior_control_state
394 /* See the definition of stop_kind above. */
395 enum stop_kind stop_soon;
398 /* Inferior process specific part of `struct infcall_suspend_state'.
400 Inferior thread counterpart is `struct thread_suspend_state'. */
402 struct inferior_suspend_state
406 /* GDB represents the state of each program execution with an object
407 called an inferior. An inferior typically corresponds to a process
408 but is more general and applies also to targets that do not have a
409 notion of processes. Each run of an executable creates a new
410 inferior, as does each attachment to an existing process.
411 Inferiors have unique internal identifiers that are different from
412 target process ids. Each inferior may in turn have multiple
413 threads running in it. */
417 /* Pointer to next inferior in singly-linked list of inferiors. */
418 struct inferior *next;
420 /* Convenient handle (GDB inferior id). Unique across all
424 /* Actual target inferior id, usually, a process id. This matches
425 the ptid_t.pid member of threads of this inferior. */
428 /* State of GDB control of inferior process execution.
429 See `struct inferior_control_state'. */
430 struct inferior_control_state control;
432 /* State of inferior process to restore after GDB is done with an inferior
433 call. See `struct inferior_suspend_state'. */
434 struct inferior_suspend_state suspend;
436 /* True if this was an auto-created inferior, e.g. created from
437 following a fork; false, if this inferior was manually added by
438 the user, and we should not attempt to prune it
442 /* The address space bound to this inferior. */
443 struct address_space *aspace;
445 /* The program space bound to this inferior. */
446 struct program_space *pspace;
448 /* The arguments string to use when running. */
451 /* The size of elements in argv. */
454 /* The vector version of arguments. If ARGC is nonzero,
455 then we must compute ARGS from this (via the target).
456 This is always coming from main's argv and therefore
457 should never be freed. */
460 /* The name of terminal device to use for I/O. */
463 /* Environment to use for running inferior,
464 in format described in environ.h. */
465 struct gdb_environ *environment;
467 /* Nonzero if this child process was attached rather than
471 /* If this inferior is a vfork child, then this is the pointer to
472 its vfork parent, if GDB is still attached to it. */
473 struct inferior *vfork_parent;
475 /* If this process is a vfork parent, this is the pointer to the
476 child. Since a vfork parent is left frozen by the kernel until
477 the child execs or exits, a process can only have one vfork child
479 struct inferior *vfork_child;
481 /* True if this inferior should be detached when it's vfork sibling
485 /* True if this inferior is a vfork parent waiting for a vfork child
486 not under our control to be done with the shared memory region,
487 either by exiting or execing. */
488 int waiting_for_vfork_done;
490 /* True if we're in the process of detaching from this inferior. */
493 /* What is left to do for an execution command after any thread of
494 this inferior stops. For continuations associated with a
495 specific thread, see `struct thread_info'. */
496 struct continuation *continuations;
498 /* Private data used by the target vector implementation. */
499 struct private_inferior *private;
501 /* HAS_EXIT_CODE is true if the inferior exited with an exit code.
502 In this case, the EXIT_CODE field is also valid. */
506 /* We keep a count of the number of times the user has requested a
507 particular syscall to be tracked, and pass this information to the
508 target. This lets capable targets implement filtering directly. */
510 /* Number of times that "any" syscall is requested. */
511 int any_syscall_count;
513 /* Count of each system call. */
514 VEC(int) *syscalls_counts;
516 /* This counts all syscall catch requests, so we can readily determine
517 if any catching is necessary. */
518 int total_syscalls_count;
520 /* Per inferior data-pointers required by other GDB modules. */
525 /* Keep a registry of per-inferior data-pointers required by other GDB
528 extern const struct inferior_data *register_inferior_data (void);
529 extern const struct inferior_data *register_inferior_data_with_cleanup
530 (void (*cleanup) (struct inferior *, void *));
531 extern void clear_inferior_data (struct inferior *inf);
532 extern void set_inferior_data (struct inferior *inf,
533 const struct inferior_data *data, void *value);
534 extern void *inferior_data (struct inferior *inf,
535 const struct inferior_data *data);
537 /* Create an empty inferior list, or empty the existing one. */
538 extern void init_inferior_list (void);
540 /* Add an inferior to the inferior list, print a message that a new
541 inferior is found, and return the pointer to the new inferior.
542 Caller may use this pointer to initialize the private inferior
544 extern struct inferior *add_inferior (int pid);
546 /* Same as add_inferior, but don't print new inferior notifications to
548 extern struct inferior *add_inferior_silent (int pid);
550 /* Delete an existing inferior list entry, due to inferior exit. */
551 extern void delete_inferior (int pid);
553 extern void delete_inferior_1 (struct inferior *todel, int silent);
555 /* Same as delete_inferior, but don't print new inferior notifications
557 extern void delete_inferior_silent (int pid);
559 /* Delete an existing inferior list entry, due to inferior detaching. */
560 extern void detach_inferior (int pid);
562 extern void exit_inferior (int pid);
564 extern void exit_inferior_silent (int pid);
566 extern void exit_inferior_num_silent (int num);
568 extern void inferior_appeared (struct inferior *inf, int pid);
570 /* Get rid of all inferiors. */
571 extern void discard_all_inferiors (void);
573 /* Translate the integer inferior id (GDB's homegrown id, not the system's)
574 into a "pid" (which may be overloaded with extra inferior information). */
575 extern int gdb_inferior_id_to_pid (int);
577 /* Translate a target 'pid' into the integer inferior id (GDB's
578 homegrown id, not the system's). */
579 extern int pid_to_gdb_inferior_id (int pid);
581 /* Boolean test for an already-known pid. */
582 extern int in_inferior_list (int pid);
584 /* Boolean test for an already-known inferior id (GDB's homegrown id,
585 not the system's). */
586 extern int valid_gdb_inferior_id (int num);
588 /* Search function to lookup an inferior by target 'pid'. */
589 extern struct inferior *find_inferior_pid (int pid);
591 /* Search function to lookup an inferior by GDB 'num'. */
592 extern struct inferior *find_inferior_id (int num);
594 /* Find an inferior bound to PSPACE. */
595 extern struct inferior *
596 find_inferior_for_program_space (struct program_space *pspace);
598 /* Inferior iterator function.
600 Calls a callback function once for each inferior, so long as the
601 callback function returns false. If the callback function returns
602 true, the iteration will end and the current inferior will be
603 returned. This can be useful for implementing a search for a
604 inferior with arbitrary attributes, or for applying some operation
607 It is safe to delete the iterated inferior from the callback. */
608 extern struct inferior *iterate_over_inferiors (int (*) (struct inferior *,
612 /* Returns true if the inferior list is not empty. */
613 extern int have_inferiors (void);
615 /* Returns true if there are any live inferiors in the inferior list
616 (not cores, not executables, real live processes). */
617 extern int have_live_inferiors (void);
619 /* Return a pointer to the current inferior. It is an error to call
620 this if there is no current inferior. */
621 extern struct inferior *current_inferior (void);
623 extern void set_current_inferior (struct inferior *);
625 extern struct cleanup *save_current_inferior (void);
627 /* Traverse all inferiors. */
629 #define ALL_INFERIORS(I) \
630 for ((I) = inferior_list; (I); (I) = (I)->next)
632 extern struct inferior *inferior_list;
634 /* Prune away automatically added inferiors that aren't required
636 extern void prune_inferiors (void);
638 extern int number_of_inferiors (void);
640 extern struct inferior *add_inferior_with_spaces (void);
642 extern void update_observer_mode (void);
644 #endif /* !defined (INFERIOR_H) */