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 /* Save value of inferior_ptid so that it may be restored by
69 a later call to do_cleanups(). Returns the struct cleanup
70 pointer needed for later doing the cleanup. */
71 extern struct cleanup * save_inferior_ptid (void);
73 extern void set_sigint_trap (void);
75 extern void clear_sigint_trap (void);
77 /* Set/get file name for default use for standard in/out in the inferior. */
79 extern void set_inferior_io_terminal (const char *terminal_name);
80 extern const char *get_inferior_io_terminal (void);
82 /* Collected pid, tid, etc. of the debugged inferior. When there's
83 no inferior, ptid_get_pid (inferior_ptid) will be 0. */
85 extern ptid_t inferior_ptid;
87 /* Are we simulating synchronous execution? This is used in async gdb
88 to implement the 'run', 'continue' etc commands, which will not
89 redisplay the prompt until the execution is actually over. */
90 extern int sync_execution;
92 /* Inferior environment. */
94 extern void clear_proceed_status (void);
96 extern void proceed (CORE_ADDR, enum gdb_signal, int);
98 extern int sched_multi;
100 /* When set, stop the 'step' command if we enter a function which has
101 no line number information. The normal behavior is that we step
102 over such function. */
103 extern int step_stop_if_no_debug;
105 /* If set, the inferior should be controlled in non-stop mode. In
106 this mode, each thread is controlled independently. Execution
107 commands apply only to the selected thread by default, and stop
108 events stop only the thread that had the event -- the other threads
109 are kept running freely. */
112 /* When set (default), the target should attempt to disable the operating
113 system's address space randomization feature when starting an inferior. */
114 extern int disable_randomization;
116 extern void generic_mourn_inferior (void);
118 extern CORE_ADDR unsigned_pointer_to_address (struct gdbarch *gdbarch,
120 const gdb_byte *buf);
121 extern void unsigned_address_to_pointer (struct gdbarch *gdbarch,
122 struct type *type, gdb_byte *buf,
124 extern CORE_ADDR signed_pointer_to_address (struct gdbarch *gdbarch,
126 const gdb_byte *buf);
127 extern void address_to_signed_pointer (struct gdbarch *gdbarch,
128 struct type *type, gdb_byte *buf,
131 extern void wait_for_inferior (void);
133 extern void prepare_for_detach (void);
135 extern void fetch_inferior_event (void *);
137 extern void init_wait_for_inferior (void);
139 extern void reopen_exec_file (void);
141 /* The `resume' routine should only be called in special circumstances.
142 Normally, use `proceed', which handles a lot of bookkeeping. */
144 extern void resume (int, enum gdb_signal);
146 extern ptid_t user_visible_resume_ptid (int step);
148 extern void insert_step_resume_breakpoint_at_sal (struct gdbarch *,
149 struct symtab_and_line ,
152 /* From misc files */
154 extern void default_print_registers_info (struct gdbarch *gdbarch,
155 struct ui_file *file,
156 struct frame_info *frame,
157 int regnum, int all);
159 extern void child_terminal_info (struct target_ops *self, const char *, int);
161 extern void term_info (char *, int);
163 extern void child_terminal_save_ours (struct target_ops *self);
165 extern void child_terminal_ours (struct target_ops *self);
167 extern void child_terminal_ours_for_output (struct target_ops *self);
169 extern void child_terminal_inferior (struct target_ops *self);
171 extern void child_terminal_init (struct target_ops *self);
173 extern void child_terminal_init_with_pgrp (int pgrp);
175 /* From fork-child.c */
177 extern int fork_inferior (char *, char *, char **,
179 void (*)(int), void (*)(void), char *,
180 void (*)(const char *,
181 char * const *, char * const *));
184 extern void startup_inferior (int);
186 extern char *construct_inferior_arguments (int, char **);
190 extern unsigned int debug_infrun;
192 extern int stop_on_solib_events;
194 extern void start_remote (int from_tty);
196 extern void normal_stop (void);
198 extern void print_stop_event (struct target_waitstatus *ws);
200 extern int signal_stop_state (int);
202 extern int signal_print_state (int);
204 extern int signal_pass_state (int);
206 extern int signal_stop_update (int, int);
208 extern int signal_print_update (int, int);
210 extern int signal_pass_update (int, int);
212 extern void get_last_target_status(ptid_t *ptid,
213 struct target_waitstatus *status);
215 extern void follow_inferior_reset_breakpoints (void);
217 void set_step_info (struct frame_info *frame, struct symtab_and_line sal);
219 /* Clear the convenience variables associated with the exit of the
220 inferior. Currently, those variables are $_exitcode and
223 extern void clear_exit_convenience_vars (void);
227 extern void post_create_inferior (struct target_ops *, int);
229 extern void attach_command (char *, int);
231 extern char *get_inferior_args (void);
233 extern void set_inferior_args (char *);
235 extern void set_inferior_args_vector (int, char **);
237 extern void registers_info (char *, int);
239 extern void continue_1 (int all_threads);
241 extern void interrupt_target_1 (int all_threads);
243 extern void delete_longjmp_breakpoint_cleanup (void *arg);
245 extern void detach_command (char *, int);
247 extern void notice_new_inferior (ptid_t, int, int);
249 extern struct value *get_return_value (struct value *function,
250 struct type *value_type);
252 /* Whether to start up the debuggee under a shell.
254 If startup-with-shell is set, GDB's "run" will attempt to start up
255 the debuggee under a shell.
257 This is in order for argument-expansion to occur. E.g.,
261 The "*" gets expanded by the shell into a list of files.
263 While this is a nice feature, it may be handy to bypass the shell
264 in some cases. To disable this feature, do "set startup-with-shell
267 The catch-exec traps expected during start-up will be one more if
268 the target is started up with a shell. */
269 extern int startup_with_shell;
271 /* Address at which inferior stopped. */
273 extern CORE_ADDR stop_pc;
275 /* Nonzero if stopped due to completion of a stack dummy routine. */
277 extern enum stop_stack_kind stop_stack_dummy;
279 /* Nonzero if program stopped due to a random (unexpected) signal in
282 extern int stopped_by_random_signal;
284 /* STEP_OVER_ALL means step over all subroutine calls.
285 STEP_OVER_UNDEBUGGABLE means step over calls to undebuggable functions.
286 STEP_OVER_NONE means don't step over any subroutine calls. */
288 enum step_over_calls_kind
292 STEP_OVER_UNDEBUGGABLE
295 /* Anything but NO_STOP_QUIETLY means we expect a trap and the caller
296 will handle it themselves. STOP_QUIETLY is used when running in
297 the shell before the child program has been exec'd and when running
298 through shared library loading. STOP_QUIETLY_REMOTE is used when
299 setting up a remote connection; it is like STOP_QUIETLY_NO_SIGSTOP
300 except that there is no need to hide a signal. */
302 /* It is also used after attach, due to attaching to a process. This
303 is a bit trickier. When doing an attach, the kernel stops the
304 debuggee with a SIGSTOP. On newer GNU/Linux kernels (>= 2.5.61)
305 the handling of SIGSTOP for a ptraced process has changed. Earlier
306 versions of the kernel would ignore these SIGSTOPs, while now
307 SIGSTOP is treated like any other signal, i.e. it is not muffled.
309 If the gdb user does a 'continue' after the 'attach', gdb passes
310 the global variable stop_signal (which stores the signal from the
311 attach, SIGSTOP) to the ptrace(PTRACE_CONT,...) call. This is
312 problematic, because the kernel doesn't ignore such SIGSTOP
313 now. I.e. it is reported back to gdb, which in turn presents it
316 To avoid the problem, we use STOP_QUIETLY_NO_SIGSTOP, which allows
317 gdb to clear the value of stop_signal after the attach, so that it
318 is not passed back down to the kernel. */
325 STOP_QUIETLY_NO_SIGSTOP
328 /* Reverse execution. */
329 enum exec_direction_kind
335 /* The current execution direction. This should only be set to enum
336 exec_direction_kind values. It is only an int to make it
337 compatible with make_cleanup_restore_integer. */
338 extern int execution_direction;
340 /* Save register contents here when executing a "finish" command or are
341 about to pop a stack dummy frame, if-and-only-if proceed_to_finish is set.
342 Thus this contains the return value from the called function (assuming
343 values are returned in a register). */
345 extern struct regcache *stop_registers;
347 /* True if we are debugging displaced stepping. */
348 extern int debug_displaced;
350 /* Dump LEN bytes at BUF in hex to FILE, followed by a newline. */
351 void displaced_step_dump_bytes (struct ui_file *file,
352 const gdb_byte *buf, size_t len);
354 struct displaced_step_closure *get_displaced_step_closure_by_addr (CORE_ADDR addr);
356 /* Possible values for gdbarch_call_dummy_location. */
358 #define AT_ENTRY_POINT 4
360 /* Number of traps that happen between exec'ing the shell to run an
361 inferior and when we finally get to the inferior code, not counting
362 the exec for the shell. This is 1 on most implementations.
363 Overridden in nm.h files. */
364 #if !defined(START_INFERIOR_TRAPS_EXPECTED)
365 #define START_INFERIOR_TRAPS_EXPECTED 1
368 struct private_inferior;
370 /* Inferior process specific part of `struct infcall_control_state'.
372 Inferior thread counterpart is `struct thread_control_state'. */
374 struct inferior_control_state
376 /* See the definition of stop_kind above. */
377 enum stop_kind stop_soon;
380 /* Inferior process specific part of `struct infcall_suspend_state'.
382 Inferior thread counterpart is `struct thread_suspend_state'. */
384 #if 0 /* Currently unused and empty structures are not valid C. */
385 struct inferior_suspend_state
390 /* GDB represents the state of each program execution with an object
391 called an inferior. An inferior typically corresponds to a process
392 but is more general and applies also to targets that do not have a
393 notion of processes. Each run of an executable creates a new
394 inferior, as does each attachment to an existing process.
395 Inferiors have unique internal identifiers that are different from
396 target process ids. Each inferior may in turn have multiple
397 threads running in it. */
401 /* Pointer to next inferior in singly-linked list of inferiors. */
402 struct inferior *next;
404 /* Convenient handle (GDB inferior id). Unique across all
408 /* Actual target inferior id, usually, a process id. This matches
409 the ptid_t.pid member of threads of this inferior. */
411 /* True if the PID was actually faked by GDB. */
414 /* State of GDB control of inferior process execution.
415 See `struct inferior_control_state'. */
416 struct inferior_control_state control;
418 /* State of inferior process to restore after GDB is done with an inferior
419 call. See `struct inferior_suspend_state'. */
420 #if 0 /* Currently unused and empty structures are not valid C. */
421 struct inferior_suspend_state suspend;
424 /* True if this was an auto-created inferior, e.g. created from
425 following a fork; false, if this inferior was manually added by
426 the user, and we should not attempt to prune it
430 /* The address space bound to this inferior. */
431 struct address_space *aspace;
433 /* The program space bound to this inferior. */
434 struct program_space *pspace;
436 /* The arguments string to use when running. */
439 /* The size of elements in argv. */
442 /* The vector version of arguments. If ARGC is nonzero,
443 then we must compute ARGS from this (via the target).
444 This is always coming from main's argv and therefore
445 should never be freed. */
448 /* The name of terminal device to use for I/O. */
451 /* Environment to use for running inferior,
452 in format described in environ.h. */
453 struct gdb_environ *environment;
455 /* Nonzero if this child process was attached rather than
459 /* If this inferior is a vfork child, then this is the pointer to
460 its vfork parent, if GDB is still attached to it. */
461 struct inferior *vfork_parent;
463 /* If this process is a vfork parent, this is the pointer to the
464 child. Since a vfork parent is left frozen by the kernel until
465 the child execs or exits, a process can only have one vfork child
467 struct inferior *vfork_child;
469 /* True if this inferior should be detached when it's vfork sibling
473 /* True if this inferior is a vfork parent waiting for a vfork child
474 not under our control to be done with the shared memory region,
475 either by exiting or execing. */
476 int waiting_for_vfork_done;
478 /* True if we're in the process of detaching from this inferior. */
481 /* What is left to do for an execution command after any thread of
482 this inferior stops. For continuations associated with a
483 specific thread, see `struct thread_info'. */
484 struct continuation *continuations;
486 /* Private data used by the target vector implementation. */
487 struct private_inferior *private;
489 /* HAS_EXIT_CODE is true if the inferior exited with an exit code.
490 In this case, the EXIT_CODE field is also valid. */
494 /* Default flags to pass to the symbol reading functions. These are
495 used whenever a new objfile is created. The valid values come
496 from enum symfile_add_flags. */
499 /* Info about an inferior's target description (if it's fetched; the
500 user supplied description's filename, if any; etc.). */
501 struct target_desc_info *tdesc_info;
503 /* The architecture associated with the inferior through the
504 connection to the target.
506 The architecture vector provides some information that is really
507 a property of the inferior, accessed through a particular target:
508 ptrace operations; the layout of certain RSP packets; the
509 solib_ops vector; etc. To differentiate architecture accesses to
510 per-inferior/target properties from
511 per-thread/per-frame/per-objfile properties, accesses to
512 per-inferior/target properties should be made through
514 struct gdbarch *gdbarch;
516 /* Per inferior data-pointers required by other GDB modules. */
520 /* Keep a registry of per-inferior data-pointers required by other GDB
523 DECLARE_REGISTRY (inferior);
525 /* Create an empty inferior list, or empty the existing one. */
526 extern void init_inferior_list (void);
528 /* Add an inferior to the inferior list, print a message that a new
529 inferior is found, and return the pointer to the new inferior.
530 Caller may use this pointer to initialize the private inferior
532 extern struct inferior *add_inferior (int pid);
534 /* Same as add_inferior, but don't print new inferior notifications to
536 extern struct inferior *add_inferior_silent (int pid);
538 /* Delete an existing inferior list entry, due to inferior exit. */
539 extern void delete_inferior (int pid);
541 extern void delete_inferior_1 (struct inferior *todel, int silent);
543 /* Same as delete_inferior, but don't print new inferior notifications
545 extern void delete_inferior_silent (int pid);
547 /* Delete an existing inferior list entry, due to inferior detaching. */
548 extern void detach_inferior (int pid);
550 extern void exit_inferior (int pid);
552 extern void exit_inferior_silent (int pid);
554 extern void exit_inferior_num_silent (int num);
556 extern void inferior_appeared (struct inferior *inf, int pid);
558 /* Get rid of all inferiors. */
559 extern void discard_all_inferiors (void);
561 /* Translate the integer inferior id (GDB's homegrown id, not the system's)
562 into a "pid" (which may be overloaded with extra inferior information). */
563 extern int gdb_inferior_id_to_pid (int);
565 /* Translate a target 'pid' into the integer inferior id (GDB's
566 homegrown id, not the system's). */
567 extern int pid_to_gdb_inferior_id (int pid);
569 /* Boolean test for an already-known pid. */
570 extern int in_inferior_list (int pid);
572 /* Boolean test for an already-known inferior id (GDB's homegrown id,
573 not the system's). */
574 extern int valid_gdb_inferior_id (int num);
576 /* Search function to lookup an inferior by target 'pid'. */
577 extern struct inferior *find_inferior_pid (int pid);
579 /* Search function to lookup an inferior by GDB 'num'. */
580 extern struct inferior *find_inferior_id (int num);
582 /* Find an inferior bound to PSPACE. */
583 extern struct inferior *
584 find_inferior_for_program_space (struct program_space *pspace);
586 /* Inferior iterator function.
588 Calls a callback function once for each inferior, so long as the
589 callback function returns false. If the callback function returns
590 true, the iteration will end and the current inferior will be
591 returned. This can be useful for implementing a search for a
592 inferior with arbitrary attributes, or for applying some operation
595 It is safe to delete the iterated inferior from the callback. */
596 extern struct inferior *iterate_over_inferiors (int (*) (struct inferior *,
600 /* Returns true if the inferior list is not empty. */
601 extern int have_inferiors (void);
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);
607 /* Return a pointer to the current inferior. It is an error to call
608 this if there is no current inferior. */
609 extern struct inferior *current_inferior (void);
611 extern void set_current_inferior (struct inferior *);
613 extern struct cleanup *save_current_inferior (void);
615 /* Traverse all inferiors. */
617 #define ALL_INFERIORS(I) \
618 for ((I) = inferior_list; (I); (I) = (I)->next)
620 extern struct inferior *inferior_list;
622 /* Prune away automatically added inferiors that aren't required
624 extern void prune_inferiors (void);
626 extern int number_of_inferiors (void);
628 extern struct inferior *add_inferior_with_spaces (void);
630 extern void update_observer_mode (void);
632 extern void update_signals_program_target (void);
634 extern void signal_catch_update (const unsigned int *);
636 /* In some circumstances we allow a command to specify a numeric
637 signal. The idea is to keep these circumstances limited so that
638 users (and scripts) develop portable habits. For comparison,
639 POSIX.2 `kill' requires that 1,2,3,6,9,14, and 15 work (and using a
640 numeric signal at all is obsolescent. We are slightly more lenient
641 and allow 1-15 which should match host signal numbers on most
642 systems. Use of symbolic signal names is strongly encouraged. */
644 enum gdb_signal gdb_signal_from_command (int num);
646 #endif /* !defined (INFERIOR_H) */