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
6 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
;
34 #include "breakpoint.h"
36 /* For enum target_signal. */
39 /* For struct frame_id. */
42 /* Structure in which to save the status of the inferior. Create/Save
43 through "save_inferior_status", restore through
44 "restore_inferior_status".
46 This pair of routines should be called around any transfer of
47 control to the inferior which you don't want showing up in your
50 struct inferior_status
;
52 extern struct inferior_status
*save_inferior_status (int);
54 extern void restore_inferior_status (struct inferior_status
*);
56 extern struct cleanup
*make_cleanup_restore_inferior_status (struct inferior_status
*);
58 extern void discard_inferior_status (struct inferior_status
*);
60 extern void write_inferior_status_register (struct inferior_status
61 *inf_status
, int regno
,
64 /* The -1 ptid, often used to indicate either an error condition
65 or a "don't care" condition, i.e, "run all threads." */
66 extern ptid_t minus_one_ptid
;
68 /* The null or zero ptid, often used to indicate no process. */
69 extern ptid_t null_ptid
;
71 /* Attempt to find and return an existing ptid with the given PID, LWP,
72 and TID components. If none exists, create a new one and return
74 ptid_t
ptid_build (int pid
, long lwp
, long tid
);
76 /* Find/Create a ptid from just a pid. */
77 ptid_t
pid_to_ptid (int pid
);
79 /* Fetch the pid (process id) component from a ptid. */
80 int ptid_get_pid (ptid_t ptid
);
82 /* Fetch the lwp (lightweight process) component from a ptid. */
83 long ptid_get_lwp (ptid_t ptid
);
85 /* Fetch the tid (thread id) component from a ptid. */
86 long ptid_get_tid (ptid_t ptid
);
88 /* Compare two ptids to see if they are equal */
89 extern int ptid_equal (ptid_t p1
, ptid_t p2
);
91 /* Save value of inferior_ptid so that it may be restored by
92 a later call to do_cleanups(). Returns the struct cleanup
93 pointer needed for later doing the cleanup. */
94 extern struct cleanup
* save_inferior_ptid (void);
96 extern void set_sigint_trap (void);
98 extern void clear_sigint_trap (void);
100 extern void set_sigio_trap (void);
102 extern void clear_sigio_trap (void);
104 /* Set/get file name for default use for standard in/out in the inferior. */
106 extern void set_inferior_io_terminal (const char *terminal_name
);
107 extern const char *get_inferior_io_terminal (void);
109 /* Collected pid, tid, etc. of the debugged inferior. When there's
110 no inferior, PIDGET (inferior_ptid) will be 0. */
112 extern ptid_t inferior_ptid
;
114 /* Are we simulating synchronous execution? This is used in async gdb
115 to implement the 'run', 'continue' etc commands, which will not
116 redisplay the prompt until the execution is actually over. */
117 extern int sync_execution
;
119 /* Some targets (stupidly) report more than one exec event per actual
120 call to an event() system call. If only the last such exec event
121 need actually be noticed and responded to by the debugger (i.e.,
122 be reported to the user), then this is the number of "leading"
123 exec events which should be ignored.
125 extern int inferior_ignoring_leading_exec_events
;
127 /* Inferior environment. */
129 extern struct gdb_environ
*inferior_environ
;
131 extern void clear_proceed_status (void);
133 extern void proceed (CORE_ADDR
, enum target_signal
, int);
135 extern ptid_t
context_switch_to (ptid_t ptid
);
137 /* When set, stop the 'step' command if we enter a function which has
138 no line number information. The normal behavior is that we step
139 over such function. */
140 extern int step_stop_if_no_debug
;
142 /* If set, the inferior should be controlled in non-stop mode. In
143 this mode, each thread is controlled independently. Execution
144 commands apply only to the the selected thread by default, and stop
145 events stop only the thread that had the event -- the other threads
146 are kept running freely. */
149 extern void generic_mourn_inferior (void);
151 extern void terminal_save_ours (void);
153 extern void terminal_ours (void);
155 extern CORE_ADDR
read_pc (void);
157 extern void write_pc (CORE_ADDR
);
159 extern CORE_ADDR
unsigned_pointer_to_address (struct type
*type
,
160 const gdb_byte
*buf
);
161 extern void unsigned_address_to_pointer (struct type
*type
, gdb_byte
*buf
,
163 extern CORE_ADDR
signed_pointer_to_address (struct type
*type
,
164 const gdb_byte
*buf
);
165 extern void address_to_signed_pointer (struct type
*type
, gdb_byte
*buf
,
168 extern void wait_for_inferior (int treat_exec_as_sigtrap
);
170 extern void fetch_inferior_event (void *);
172 extern void init_wait_for_inferior (void);
174 extern void close_exec_file (void);
176 extern void reopen_exec_file (void);
178 /* The `resume' routine should only be called in special circumstances.
179 Normally, use `proceed', which handles a lot of bookkeeping. */
181 extern void resume (int, enum target_signal
);
183 /* From misc files */
185 extern void default_print_registers_info (struct gdbarch
*gdbarch
,
186 struct ui_file
*file
,
187 struct frame_info
*frame
,
188 int regnum
, int all
);
190 extern void child_terminal_info (char *, int);
192 extern void term_info (char *, int);
194 extern void terminal_ours_for_output (void);
196 extern void terminal_inferior (void);
198 extern void terminal_init_inferior (void);
200 extern void terminal_init_inferior_with_pgrp (int pgrp
);
204 extern int proc_iterate_over_mappings (int (*)(int, CORE_ADDR
));
206 extern ptid_t
procfs_first_available (void);
208 /* From fork-child.c */
210 extern void fork_inferior (char *, char *, char **,
212 void (*)(int), void (*)(void), char *);
215 extern void startup_inferior (int);
217 extern char *construct_inferior_arguments (struct gdbarch
*, int, char **);
221 extern void new_tty_prefork (const char *);
223 extern int gdb_has_a_terminal (void);
227 extern void start_remote (int from_tty
);
229 extern void normal_stop (void);
231 extern int signal_stop_state (int);
233 extern int signal_print_state (int);
235 extern int signal_pass_state (int);
237 extern int signal_stop_update (int, int);
239 extern int signal_print_update (int, int);
241 extern int signal_pass_update (int, int);
243 extern void get_last_target_status(ptid_t
*ptid
,
244 struct target_waitstatus
*status
);
246 extern void follow_inferior_reset_breakpoints (void);
248 /* Throw an error indicating the current thread is running. */
249 extern void error_is_running (void);
251 /* Calls error_is_running if the current thread is running. */
252 extern void ensure_not_running (void);
256 extern void tty_command (char *, int);
258 extern void post_create_inferior (struct target_ops
*, int);
260 extern void attach_command (char *, int);
262 extern char *get_inferior_args (void);
264 extern char *set_inferior_args (char *);
266 extern void set_inferior_args_vector (int, char **);
268 extern void registers_info (char *, int);
270 extern void nexti_command (char *, int);
272 extern void stepi_command (char *, int);
274 extern void continue_1 (int all_threads
);
276 extern void continue_command (char *, int);
278 extern void interrupt_target_command (char *args
, int from_tty
);
280 extern void interrupt_target_1 (int all_threads
);
282 /* Last signal that the inferior received (why it stopped). */
284 extern enum target_signal stop_signal
;
286 /* Address at which inferior stopped. */
288 extern CORE_ADDR stop_pc
;
290 /* Chain containing status of breakpoint(s) that we have stopped at. */
292 extern bpstat stop_bpstat
;
294 /* Flag indicating that a command has proceeded the inferior past the
295 current breakpoint. */
297 extern int breakpoint_proceeded
;
299 /* Nonzero if stopped due to a step command. */
301 extern int stop_step
;
303 /* Nonzero if stopped due to completion of a stack dummy routine. */
305 extern int stop_stack_dummy
;
307 /* Nonzero if program stopped due to a random (unexpected) signal in
310 extern int stopped_by_random_signal
;
312 /* Range to single step within.
313 If this is nonzero, respond to a single-step signal
314 by continuing to step if the pc is in this range.
316 If step_range_start and step_range_end are both 1, it means to step for
317 a single instruction (FIXME: it might clean up wait_for_inferior in a
318 minor way if this were changed to the address of the instruction and
319 that address plus one. But maybe not.). */
321 extern CORE_ADDR step_range_start
; /* Inclusive */
322 extern CORE_ADDR step_range_end
; /* Exclusive */
324 /* Stack frame address as of when stepping command was issued.
325 This is how we know when we step into a subroutine call,
326 and how to set the frame for the breakpoint used to step out. */
328 extern struct frame_id step_frame_id
;
330 /* 1 means step over all subroutine calls.
331 -1 means step over calls to undebuggable functions. */
333 enum step_over_calls_kind
337 STEP_OVER_UNDEBUGGABLE
340 extern enum step_over_calls_kind step_over_calls
;
342 /* If stepping, nonzero means step count is > 1
343 so don't print frame next time inferior stops
344 if it stops due to stepping. */
346 extern int step_multi
;
348 /* Anything but NO_STOP_QUIETLY means we expect a trap and the caller
349 will handle it themselves. STOP_QUIETLY is used when running in
350 the shell before the child program has been exec'd and when running
351 through shared library loading. STOP_QUIETLY_REMOTE is used when
352 setting up a remote connection; it is like STOP_QUIETLY_NO_SIGSTOP
353 except that there is no need to hide a signal. */
355 /* It is also used after attach, due to attaching to a process. This
356 is a bit trickier. When doing an attach, the kernel stops the
357 debuggee with a SIGSTOP. On newer GNU/Linux kernels (>= 2.5.61)
358 the handling of SIGSTOP for a ptraced process has changed. Earlier
359 versions of the kernel would ignore these SIGSTOPs, while now
360 SIGSTOP is treated like any other signal, i.e. it is not muffled.
362 If the gdb user does a 'continue' after the 'attach', gdb passes
363 the global variable stop_signal (which stores the signal from the
364 attach, SIGSTOP) to the ptrace(PTRACE_CONT,...) call. This is
365 problematic, because the kernel doesn't ignore such SIGSTOP
366 now. I.e. it is reported back to gdb, which in turn presents it
369 To avoid the problem, we use STOP_QUIETLY_NO_SIGSTOP, which allows
370 gdb to clear the value of stop_signal after the attach, so that it
371 is not passed back down to the kernel. */
378 STOP_QUIETLY_NO_SIGSTOP
381 extern enum stop_kind stop_soon
;
383 /* Nonzero if proceed is being used for a "finish" command or a similar
384 situation when stop_registers should be saved. */
386 extern int proceed_to_finish
;
388 /* Save register contents here when about to pop a stack dummy frame,
389 if-and-only-if proceed_to_finish is set.
390 Thus this contains the return value from the called function (assuming
391 values are returned in a register). */
393 extern struct regcache
*stop_registers
;
395 /* Nonzero if the child process in inferior_ptid was attached rather
398 extern int attach_flag
;
400 /* True if we are debugging displaced stepping. */
401 extern int debug_displaced
;
403 /* Dump LEN bytes at BUF in hex to FILE, followed by a newline. */
404 void displaced_step_dump_bytes (struct ui_file
*file
,
405 const gdb_byte
*buf
, size_t len
);
408 /* When set, normal_stop will not call the normal_stop observer. */
409 extern int suppress_stop_observer
;
411 /* When set, no calls to target_resumed observer will be made. */
412 extern int suppress_resume_observer
;
415 /* Possible values for gdbarch_call_dummy_location. */
417 #define AT_ENTRY_POINT 4
420 /* If STARTUP_WITH_SHELL is set, GDB's "run"
421 will attempts to start up the debugee under a shell.
422 This is in order for argument-expansion to occur. E.g.,
424 The "*" gets expanded by the shell into a list of files.
425 While this is a nice feature, it turns out to interact badly
426 with some of the catch-fork/catch-exec features we have added.
427 In particular, if the shell does any fork/exec's before
428 the exec of the target program, that can confuse GDB.
429 To disable this feature, set STARTUP_WITH_SHELL to 0.
430 To enable this feature, set STARTUP_WITH_SHELL to 1.
431 The catch-exec traps expected during start-up will
432 be 1 if target is not started up with a shell, 2 if it is.
434 If you disable this, you need to decrement
435 START_INFERIOR_TRAPS_EXPECTED in tm.h. */
436 #define STARTUP_WITH_SHELL 1
437 #if !defined(START_INFERIOR_TRAPS_EXPECTED)
438 #define START_INFERIOR_TRAPS_EXPECTED 2
440 #endif /* !defined (INFERIOR_H) */