1 /* Variables that describe the inferior process running under GDB:
2 Where it is, why it stopped, and how to step it.
4 Copyright 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
5 1996, 1998, 1999, 2000, 2001, 2003 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
24 #if !defined (INFERIOR_H)
31 #include "breakpoint.h"
33 /* For enum target_signal. */
36 /* For struct frame_id. */
39 /* Structure in which to save the status of the inferior. Create/Save
40 through "save_inferior_status", restore through
41 "restore_inferior_status".
43 This pair of routines should be called around any transfer of
44 control to the inferior which you don't want showing up in your
47 struct inferior_status;
49 extern struct inferior_status *save_inferior_status (int);
51 extern void restore_inferior_status (struct inferior_status *);
53 extern struct cleanup *make_cleanup_restore_inferior_status (struct inferior_status *);
55 extern void discard_inferior_status (struct inferior_status *);
57 extern void write_inferior_status_register (struct inferior_status
58 *inf_status, int regno,
61 /* The -1 ptid, often used to indicate either an error condition
62 or a "don't care" condition, i.e, "run all threads." */
63 extern ptid_t minus_one_ptid;
65 /* The null or zero ptid, often used to indicate no process. */
66 extern ptid_t null_ptid;
68 /* Attempt to find and return an existing ptid with the given PID, LWP,
69 and TID components. If none exists, create a new one and return
71 ptid_t ptid_build (int pid, long lwp, long tid);
73 /* Find/Create a ptid from just a pid. */
74 ptid_t pid_to_ptid (int pid);
76 /* Fetch the pid (process id) component from a ptid. */
77 int ptid_get_pid (ptid_t ptid);
79 /* Fetch the lwp (lightweight process) component from a ptid. */
80 long ptid_get_lwp (ptid_t ptid);
82 /* Fetch the tid (thread id) component from a ptid. */
83 long ptid_get_tid (ptid_t ptid);
85 /* Compare two ptids to see if they are equal */
86 extern int ptid_equal (ptid_t p1, ptid_t p2);
88 /* Save value of inferior_ptid so that it may be restored by
89 a later call to do_cleanups(). Returns the struct cleanup
90 pointer needed for later doing the cleanup. */
91 extern struct cleanup * save_inferior_ptid (void);
93 extern void set_sigint_trap (void);
95 extern void clear_sigint_trap (void);
97 extern void set_sigio_trap (void);
99 extern void clear_sigio_trap (void);
101 /* File name for default use for standard in/out in the inferior. */
103 extern char *inferior_io_terminal;
105 /* Collected pid, tid, etc. of the debugged inferior. When there's
106 no inferior, PIDGET (inferior_ptid) will be 0. */
108 extern ptid_t inferior_ptid;
110 /* Is the inferior running right now, as a result of a 'run&',
111 'continue&' etc command? This is used in asycn gdb to determine
112 whether a command that the user enters while the target is running
113 is allowed or not. */
114 extern int target_executing;
116 /* Are we simulating synchronous execution? This is used in async gdb
117 to implement the 'run', 'continue' etc commands, which will not
118 redisplay the prompt until the execution is actually over. */
119 extern int sync_execution;
121 /* This is only valid when inferior_ptid is non-zero.
123 If this is 0, then exec events should be noticed and responded to
124 by the debugger (i.e., be reported to the user).
126 If this is > 0, then that many subsequent exec events should be
127 ignored (i.e., not be reported to the user).
129 extern int inferior_ignoring_startup_exec_events;
131 /* This is only valid when inferior_ignoring_startup_exec_events is
134 Some targets (stupidly) report more than one exec event per actual
135 call to an event() system call. If only the last such exec event
136 need actually be noticed and responded to by the debugger (i.e.,
137 be reported to the user), then this is the number of "leading"
138 exec events which should be ignored.
140 extern int inferior_ignoring_leading_exec_events;
142 /* Inferior environment. */
144 extern struct environ *inferior_environ;
146 extern void clear_proceed_status (void);
148 extern void proceed (CORE_ADDR, enum target_signal, int);
150 /* When set, stop the 'step' command if we enter a function which has
151 no line number information. The normal behavior is that we step
152 over such function. */
153 extern int step_stop_if_no_debug;
155 extern void kill_inferior (void);
157 extern void generic_mourn_inferior (void);
159 extern void terminal_save_ours (void);
161 extern void terminal_ours (void);
163 extern int run_stack_dummy (CORE_ADDR , struct regcache *);
165 extern CORE_ADDR read_pc (void);
167 extern CORE_ADDR read_pc_pid (ptid_t);
169 extern CORE_ADDR generic_target_read_pc (ptid_t);
171 extern void write_pc (CORE_ADDR);
173 extern void write_pc_pid (CORE_ADDR, ptid_t);
175 extern void generic_target_write_pc (CORE_ADDR, ptid_t);
177 extern CORE_ADDR read_sp (void);
179 extern CORE_ADDR generic_target_read_sp (void);
181 extern void generic_target_write_sp (CORE_ADDR);
183 extern CORE_ADDR read_fp (void);
185 extern CORE_ADDR generic_target_read_fp (void);
187 extern CORE_ADDR unsigned_pointer_to_address (struct type *type, const void *buf);
189 extern void unsigned_address_to_pointer (struct type *type, void *buf,
191 extern CORE_ADDR signed_pointer_to_address (struct type *type,
193 extern void address_to_signed_pointer (struct type *type, void *buf,
196 extern void wait_for_inferior (void);
198 extern void fetch_inferior_event (void *);
200 extern void init_wait_for_inferior (void);
202 extern void close_exec_file (void);
204 extern void reopen_exec_file (void);
206 /* The `resume' routine should only be called in special circumstances.
207 Normally, use `proceed', which handles a lot of bookkeeping. */
209 extern void resume (int, enum target_signal);
211 /* From misc files */
213 extern void default_print_registers_info (struct gdbarch *gdbarch,
214 struct ui_file *file,
215 struct frame_info *frame,
216 int regnum, int all);
218 extern void store_inferior_registers (int);
220 extern void fetch_inferior_registers (int);
222 extern void solib_create_inferior_hook (void);
224 extern void child_terminal_info (char *, int);
226 extern void term_info (char *, int);
228 extern void terminal_ours_for_output (void);
230 extern void terminal_inferior (void);
232 extern void terminal_init_inferior (void);
234 extern void terminal_init_inferior_with_pgrp (int pgrp);
236 /* From infptrace.c or infttrace.c */
238 extern int attach (int);
240 extern void detach (int);
242 /* PTRACE method of waiting for inferior process. */
243 int ptrace_wait (ptid_t, int *);
245 extern void child_resume (ptid_t, int, enum target_signal);
247 #ifndef PTRACE_ARG3_TYPE
248 #define PTRACE_ARG3_TYPE int /* Correct definition for most systems. */
251 extern int call_ptrace (int, int, PTRACE_ARG3_TYPE, int);
253 extern void pre_fork_inferior (void);
257 extern int proc_iterate_over_mappings (int (*)(int, CORE_ADDR));
259 extern ptid_t procfs_first_available (void);
261 /* From fork-child.c */
263 extern void fork_inferior (char *, char *, char **,
265 void (*)(int), void (*)(void), char *);
268 extern void startup_inferior (int);
270 extern char *construct_inferior_arguments (struct gdbarch *, int, char **);
274 extern void new_tty_prefork (char *);
276 extern int gdb_has_a_terminal (void);
280 extern void start_remote (void);
282 extern void normal_stop (void);
284 extern int signal_stop_state (int);
286 extern int signal_print_state (int);
288 extern int signal_pass_state (int);
290 extern int signal_stop_update (int, int);
292 extern int signal_print_update (int, int);
294 extern int signal_pass_update (int, int);
296 extern void get_last_target_status(ptid_t *ptid,
297 struct target_waitstatus *status);
299 extern void follow_inferior_reset_breakpoints (void);
303 extern void tty_command (char *, int);
305 extern void attach_command (char *, int);
307 extern char *get_inferior_args (void);
309 extern char *set_inferior_args (char *);
311 extern void set_inferior_args_vector (int, char **);
313 extern void registers_info (char *, int);
315 extern void nexti_command (char *, int);
317 extern void stepi_command (char *, int);
319 extern void continue_command (char *, int);
321 extern void interrupt_target_command (char *args, int from_tty);
323 /* Last signal that the inferior received (why it stopped). */
325 extern enum target_signal stop_signal;
327 /* Address at which inferior stopped. */
329 extern CORE_ADDR stop_pc;
331 /* Chain containing status of breakpoint(s) that we have stopped at. */
333 extern bpstat stop_bpstat;
335 /* Flag indicating that a command has proceeded the inferior past the
336 current breakpoint. */
338 extern int breakpoint_proceeded;
340 /* Nonzero if stopped due to a step command. */
342 extern int stop_step;
344 /* Nonzero if stopped due to completion of a stack dummy routine. */
346 extern int stop_stack_dummy;
348 /* Nonzero if program stopped due to a random (unexpected) signal in
351 extern int stopped_by_random_signal;
353 /* Range to single step within.
354 If this is nonzero, respond to a single-step signal
355 by continuing to step if the pc is in this range.
357 If step_range_start and step_range_end are both 1, it means to step for
358 a single instruction (FIXME: it might clean up wait_for_inferior in a
359 minor way if this were changed to the address of the instruction and
360 that address plus one. But maybe not.). */
362 extern CORE_ADDR step_range_start; /* Inclusive */
363 extern CORE_ADDR step_range_end; /* Exclusive */
365 /* Stack frame address as of when stepping command was issued.
366 This is how we know when we step into a subroutine call,
367 and how to set the frame for the breakpoint used to step out. */
369 extern struct frame_id step_frame_id;
371 /* Our notion of the current stack pointer. */
373 extern CORE_ADDR step_sp;
375 /* 1 means step over all subroutine calls.
376 -1 means step over calls to undebuggable functions. */
378 enum step_over_calls_kind
382 STEP_OVER_UNDEBUGGABLE
385 extern enum step_over_calls_kind step_over_calls;
387 /* If stepping, nonzero means step count is > 1
388 so don't print frame next time inferior stops
389 if it stops due to stepping. */
391 extern int step_multi;
393 /* Nonzero means expecting a trap and caller will handle it themselves.
394 It is used after attach, due to attaching to a process;
395 when running in the shell before the child program has been exec'd;
396 and when running some kinds of remote stuff (FIXME?). */
398 extern int stop_soon_quietly;
400 /* Nonzero if proceed is being used for a "finish" command or a similar
401 situation when stop_registers should be saved. */
403 extern int proceed_to_finish;
405 /* Save register contents here when about to pop a stack dummy frame,
406 if-and-only-if proceed_to_finish is set.
407 Thus this contains the return value from the called function (assuming
408 values are returned in a register). */
410 extern struct regcache *stop_registers;
412 /* Nonzero if the child process in inferior_ptid was attached rather
415 extern int attach_flag;
417 /* Possible values for CALL_DUMMY_LOCATION. */
419 #define AT_ENTRY_POINT 4
421 #if !defined (CALL_DUMMY_ADDRESS)
422 #define CALL_DUMMY_ADDRESS() (internal_error (__FILE__, __LINE__, "CALL_DUMMY_ADDRESS"), 0)
424 #if !defined (CALL_DUMMY_START_OFFSET)
425 #define CALL_DUMMY_START_OFFSET (internal_error (__FILE__, __LINE__, "CALL_DUMMY_START_OFFSET"), 0)
427 #if !defined (CALL_DUMMY_BREAKPOINT_OFFSET)
428 #define CALL_DUMMY_BREAKPOINT_OFFSET_P (0)
429 #define CALL_DUMMY_BREAKPOINT_OFFSET (internal_error (__FILE__, __LINE__, "CALL_DUMMY_BREAKPOINT_OFFSET"), 0)
431 #if !defined CALL_DUMMY_BREAKPOINT_OFFSET_P
432 #define CALL_DUMMY_BREAKPOINT_OFFSET_P (1)
434 #if !defined (CALL_DUMMY_LENGTH)
435 #define CALL_DUMMY_LENGTH (internal_error (__FILE__, __LINE__, "CALL_DUMMY_LENGTH"), 0)
438 /* FIXME: cagney/2000-04-17: gdbarch should manage this. The default
439 shouldn't be necessary. */
441 #if !defined (CALL_DUMMY_P)
442 #if defined (CALL_DUMMY)
443 #define CALL_DUMMY_P 1
445 #define CALL_DUMMY_P 0
449 #if !defined PUSH_DUMMY_FRAME
450 #define PUSH_DUMMY_FRAME (internal_error (__FILE__, __LINE__, "PUSH_DUMMY_FRAME"), 0)
453 #if !defined FIX_CALL_DUMMY
454 #define FIX_CALL_DUMMY(a1,a2,a3,a4,a5,a6,a7) (internal_error (__FILE__, __LINE__, "FIX_CALL_DUMMY"), 0)
457 #if !defined STORE_STRUCT_RETURN
458 #define STORE_STRUCT_RETURN(a1,a2) (internal_error (__FILE__, __LINE__, "STORE_STRUCT_RETURN"), 0)
462 /* Are we in a call dummy? */
464 /* NOTE: cagney/2002-11-24: Targets need to both switch to generic
465 dummy frames, and use generic_pc_in_call_dummy(). The generic
466 version should be able to handle all cases since that code works by
467 saving the address of the dummy's breakpoint (where ever it is). */
469 extern int deprecated_pc_in_call_dummy_on_stack (CORE_ADDR pc,
471 CORE_ADDR frame_address);
473 /* NOTE: cagney/2002-11-24: Targets need to both switch to generic
474 dummy frames, and use generic_pc_in_call_dummy(). The generic
475 version should be able to handle all cases since that code works by
476 saving the address of the dummy's breakpoint (where ever it is). */
478 extern int deprecated_pc_in_call_dummy_at_entry_point (CORE_ADDR pc,
480 CORE_ADDR frame_address);
482 /* It's often not enough for our clients to know whether the PC is merely
483 somewhere within the call dummy. They may need to know whether the
484 call dummy has actually completed. (For example, wait_for_inferior
485 wants to know when it should truly stop because the call dummy has
486 completed. If we're single-stepping because of slow watchpoints,
487 then we may find ourselves stopped at the entry of the call dummy,
488 and want to continue stepping until we reach the end.)
490 Note that this macro is intended for targets (like HP-UX) which
491 require more than a single breakpoint in their call dummies, and
492 therefore cannot use the CALL_DUMMY_BREAKPOINT_OFFSET mechanism.
494 If a target does define CALL_DUMMY_BREAKPOINT_OFFSET, then this
495 default implementation of CALL_DUMMY_HAS_COMPLETED is sufficient.
496 Else, a target may wish to supply an implementation that works in
497 the presense of multiple breakpoints in its call dummy.
499 #if !defined(CALL_DUMMY_HAS_COMPLETED)
500 #define CALL_DUMMY_HAS_COMPLETED(pc, sp, frame_address) \
501 DEPRECATED_PC_IN_CALL_DUMMY((pc), (sp), (frame_address))
504 /* If STARTUP_WITH_SHELL is set, GDB's "run"
505 will attempts to start up the debugee under a shell.
506 This is in order for argument-expansion to occur. E.g.,
508 The "*" gets expanded by the shell into a list of files.
509 While this is a nice feature, it turns out to interact badly
510 with some of the catch-fork/catch-exec features we have added.
511 In particular, if the shell does any fork/exec's before
512 the exec of the target program, that can confuse GDB.
513 To disable this feature, set STARTUP_WITH_SHELL to 0.
514 To enable this feature, set STARTUP_WITH_SHELL to 1.
515 The catch-exec traps expected during start-up will
516 be 1 if target is not started up with a shell, 2 if it is.
518 If you disable this, you need to decrement
519 START_INFERIOR_TRAPS_EXPECTED in tm.h. */
520 #define STARTUP_WITH_SHELL 1
521 #if !defined(START_INFERIOR_TRAPS_EXPECTED)
522 #define START_INFERIOR_TRAPS_EXPECTED 2
524 #endif /* !defined (INFERIOR_H) */