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
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 /* Is the inferior running right now, as a result of a 'run&',
115 'continue&' etc command? This is used in asycn gdb to determine
116 whether a command that the user enters while the target is running
117 is allowed or not. */
118 extern int target_executing;
120 /* Are we simulating synchronous execution? This is used in async gdb
121 to implement the 'run', 'continue' etc commands, which will not
122 redisplay the prompt until the execution is actually over. */
123 extern int sync_execution;
125 /* Some targets (stupidly) report more than one exec event per actual
126 call to an event() system call. If only the last such exec event
127 need actually be noticed and responded to by the debugger (i.e.,
128 be reported to the user), then this is the number of "leading"
129 exec events which should be ignored.
131 extern int inferior_ignoring_leading_exec_events;
133 /* Inferior environment. */
135 extern struct gdb_environ *inferior_environ;
137 extern void clear_proceed_status (void);
139 extern void proceed (CORE_ADDR, enum target_signal, int);
141 /* When set, stop the 'step' command if we enter a function which has
142 no line number information. The normal behavior is that we step
143 over such function. */
144 extern int step_stop_if_no_debug;
146 extern void generic_mourn_inferior (void);
148 extern void terminal_save_ours (void);
150 extern void terminal_ours (void);
152 extern CORE_ADDR read_pc (void);
154 extern CORE_ADDR read_pc_pid (ptid_t);
156 extern void write_pc (CORE_ADDR);
158 extern void write_pc_pid (CORE_ADDR, ptid_t);
160 extern CORE_ADDR unsigned_pointer_to_address (struct type *type,
161 const gdb_byte *buf);
162 extern void unsigned_address_to_pointer (struct type *type, gdb_byte *buf,
164 extern CORE_ADDR signed_pointer_to_address (struct type *type,
165 const gdb_byte *buf);
166 extern void address_to_signed_pointer (struct type *type, gdb_byte *buf,
169 extern void wait_for_inferior (void);
171 extern void fetch_inferior_event (void *);
173 extern void init_wait_for_inferior (void);
175 extern void close_exec_file (void);
177 extern void reopen_exec_file (void);
179 /* The `resume' routine should only be called in special circumstances.
180 Normally, use `proceed', which handles a lot of bookkeeping. */
182 extern void resume (int, enum target_signal);
184 /* From misc files */
186 extern void default_print_registers_info (struct gdbarch *gdbarch,
187 struct ui_file *file,
188 struct frame_info *frame,
189 int regnum, int all);
191 extern void child_terminal_info (char *, int);
193 extern void term_info (char *, int);
195 extern void terminal_ours_for_output (void);
197 extern void terminal_inferior (void);
199 extern void terminal_init_inferior (void);
201 extern void terminal_init_inferior_with_pgrp (int pgrp);
205 extern int proc_iterate_over_mappings (int (*)(int, CORE_ADDR));
207 extern ptid_t procfs_first_available (void);
209 /* From fork-child.c */
211 extern void fork_inferior (char *, char *, char **,
213 void (*)(int), void (*)(void), char *);
216 extern void startup_inferior (int);
218 extern char *construct_inferior_arguments (struct gdbarch *, int, char **);
222 extern void new_tty_prefork (const char *);
224 extern int gdb_has_a_terminal (void);
228 extern void start_remote (int from_tty);
230 extern void normal_stop (void);
232 extern int signal_stop_state (int);
234 extern int signal_print_state (int);
236 extern int signal_pass_state (int);
238 extern int signal_stop_update (int, int);
240 extern int signal_print_update (int, int);
242 extern int signal_pass_update (int, int);
244 extern void get_last_target_status(ptid_t *ptid,
245 struct target_waitstatus *status);
247 extern void follow_inferior_reset_breakpoints (void);
251 extern void tty_command (char *, int);
253 extern void post_create_inferior (struct target_ops *, int);
255 extern void attach_command (char *, int);
257 extern char *get_inferior_args (void);
259 extern char *set_inferior_args (char *);
261 extern void set_inferior_args_vector (int, char **);
263 extern void registers_info (char *, int);
265 extern void nexti_command (char *, int);
267 extern void stepi_command (char *, int);
269 extern void continue_command (char *, int);
271 extern void interrupt_target_command (char *args, int from_tty);
273 /* Last signal that the inferior received (why it stopped). */
275 extern enum target_signal stop_signal;
277 /* Address at which inferior stopped. */
279 extern CORE_ADDR stop_pc;
281 /* Chain containing status of breakpoint(s) that we have stopped at. */
283 extern bpstat stop_bpstat;
285 /* Flag indicating that a command has proceeded the inferior past the
286 current breakpoint. */
288 extern int breakpoint_proceeded;
290 /* Nonzero if stopped due to a step command. */
292 extern int stop_step;
294 /* Nonzero if stopped due to completion of a stack dummy routine. */
296 extern int stop_stack_dummy;
298 /* Nonzero if program stopped due to a random (unexpected) signal in
301 extern int stopped_by_random_signal;
303 /* Range to single step within.
304 If this is nonzero, respond to a single-step signal
305 by continuing to step if the pc is in this range.
307 If step_range_start and step_range_end are both 1, it means to step for
308 a single instruction (FIXME: it might clean up wait_for_inferior in a
309 minor way if this were changed to the address of the instruction and
310 that address plus one. But maybe not.). */
312 extern CORE_ADDR step_range_start; /* Inclusive */
313 extern CORE_ADDR step_range_end; /* Exclusive */
315 /* Stack frame address as of when stepping command was issued.
316 This is how we know when we step into a subroutine call,
317 and how to set the frame for the breakpoint used to step out. */
319 extern struct frame_id step_frame_id;
321 /* 1 means step over all subroutine calls.
322 -1 means step over calls to undebuggable functions. */
324 enum step_over_calls_kind
328 STEP_OVER_UNDEBUGGABLE
331 extern enum step_over_calls_kind step_over_calls;
333 /* If stepping, nonzero means step count is > 1
334 so don't print frame next time inferior stops
335 if it stops due to stepping. */
337 extern int step_multi;
339 /* Anything but NO_STOP_QUIETLY means we expect a trap and the caller
340 will handle it themselves. STOP_QUIETLY is used when running in
341 the shell before the child program has been exec'd and when running
342 through shared library loading. STOP_QUIETLY_REMOTE is used when
343 setting up a remote connection; it is like STOP_QUIETLY_NO_SIGSTOP
344 except that there is no need to hide a signal. */
346 /* It is also used after attach, due to attaching to a process. This
347 is a bit trickier. When doing an attach, the kernel stops the
348 debuggee with a SIGSTOP. On newer GNU/Linux kernels (>= 2.5.61)
349 the handling of SIGSTOP for a ptraced process has changed. Earlier
350 versions of the kernel would ignore these SIGSTOPs, while now
351 SIGSTOP is treated like any other signal, i.e. it is not muffled.
353 If the gdb user does a 'continue' after the 'attach', gdb passes
354 the global variable stop_signal (which stores the signal from the
355 attach, SIGSTOP) to the ptrace(PTRACE_CONT,...) call. This is
356 problematic, because the kernel doesn't ignore such SIGSTOP
357 now. I.e. it is reported back to gdb, which in turn presents it
360 To avoid the problem, we use STOP_QUIETLY_NO_SIGSTOP, which allows
361 gdb to clear the value of stop_signal after the attach, so that it
362 is not passed back down to the kernel. */
369 STOP_QUIETLY_NO_SIGSTOP
372 extern enum stop_kind stop_soon;
374 /* Nonzero if proceed is being used for a "finish" command or a similar
375 situation when stop_registers should be saved. */
377 extern int proceed_to_finish;
379 /* Save register contents here when about to pop a stack dummy frame,
380 if-and-only-if proceed_to_finish is set.
381 Thus this contains the return value from the called function (assuming
382 values are returned in a register). */
384 extern struct regcache *stop_registers;
386 /* Nonzero if the child process in inferior_ptid was attached rather
389 extern int attach_flag;
391 /* Possible values for gdbarch_call_dummy_location. */
393 #define AT_ENTRY_POINT 4
396 /* If STARTUP_WITH_SHELL is set, GDB's "run"
397 will attempts to start up the debugee under a shell.
398 This is in order for argument-expansion to occur. E.g.,
400 The "*" gets expanded by the shell into a list of files.
401 While this is a nice feature, it turns out to interact badly
402 with some of the catch-fork/catch-exec features we have added.
403 In particular, if the shell does any fork/exec's before
404 the exec of the target program, that can confuse GDB.
405 To disable this feature, set STARTUP_WITH_SHELL to 0.
406 To enable this feature, set STARTUP_WITH_SHELL to 1.
407 The catch-exec traps expected during start-up will
408 be 1 if target is not started up with a shell, 2 if it is.
410 If you disable this, you need to decrement
411 START_INFERIOR_TRAPS_EXPECTED in tm.h. */
412 #define STARTUP_WITH_SHELL 1
413 #if !defined(START_INFERIOR_TRAPS_EXPECTED)
414 #define START_INFERIOR_TRAPS_EXPECTED 2
416 #endif /* !defined (INFERIOR_H) */