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 /* When set, stop the 'step' command if we enter a function which has
136 no line number information. The normal behavior is that we step
137 over such function. */
138 extern int step_stop_if_no_debug;
140 extern void generic_mourn_inferior (void);
142 extern void terminal_save_ours (void);
144 extern void terminal_ours (void);
146 extern CORE_ADDR read_pc (void);
148 extern void write_pc (CORE_ADDR);
150 extern CORE_ADDR unsigned_pointer_to_address (struct type *type,
151 const gdb_byte *buf);
152 extern void unsigned_address_to_pointer (struct type *type, gdb_byte *buf,
154 extern CORE_ADDR signed_pointer_to_address (struct type *type,
155 const gdb_byte *buf);
156 extern void address_to_signed_pointer (struct type *type, gdb_byte *buf,
159 extern void wait_for_inferior (int treat_exec_as_sigtrap);
161 extern void fetch_inferior_event (void *);
163 extern void init_wait_for_inferior (void);
165 extern void close_exec_file (void);
167 extern void reopen_exec_file (void);
169 /* The `resume' routine should only be called in special circumstances.
170 Normally, use `proceed', which handles a lot of bookkeeping. */
172 extern void resume (int, enum target_signal);
174 /* From misc files */
176 extern void default_print_registers_info (struct gdbarch *gdbarch,
177 struct ui_file *file,
178 struct frame_info *frame,
179 int regnum, int all);
181 extern void child_terminal_info (char *, int);
183 extern void term_info (char *, int);
185 extern void terminal_ours_for_output (void);
187 extern void terminal_inferior (void);
189 extern void terminal_init_inferior (void);
191 extern void terminal_init_inferior_with_pgrp (int pgrp);
195 extern int proc_iterate_over_mappings (int (*)(int, CORE_ADDR));
197 extern ptid_t procfs_first_available (void);
199 /* From fork-child.c */
201 extern void fork_inferior (char *, char *, char **,
203 void (*)(int), void (*)(void), char *);
206 extern void startup_inferior (int);
208 extern char *construct_inferior_arguments (struct gdbarch *, int, char **);
212 extern void new_tty_prefork (const char *);
214 extern int gdb_has_a_terminal (void);
218 extern void start_remote (int from_tty);
220 extern void normal_stop (void);
222 extern int signal_stop_state (int);
224 extern int signal_print_state (int);
226 extern int signal_pass_state (int);
228 extern int signal_stop_update (int, int);
230 extern int signal_print_update (int, int);
232 extern int signal_pass_update (int, int);
234 extern void get_last_target_status(ptid_t *ptid,
235 struct target_waitstatus *status);
237 extern void follow_inferior_reset_breakpoints (void);
241 extern void tty_command (char *, int);
243 extern void post_create_inferior (struct target_ops *, int);
245 extern void attach_command (char *, int);
247 extern char *get_inferior_args (void);
249 extern char *set_inferior_args (char *);
251 extern void set_inferior_args_vector (int, char **);
253 extern void registers_info (char *, int);
255 extern void nexti_command (char *, int);
257 extern void stepi_command (char *, int);
259 extern void continue_command (char *, int);
261 extern void interrupt_target_command (char *args, int from_tty);
263 /* Last signal that the inferior received (why it stopped). */
265 extern enum target_signal stop_signal;
267 /* Address at which inferior stopped. */
269 extern CORE_ADDR stop_pc;
271 /* Chain containing status of breakpoint(s) that we have stopped at. */
273 extern bpstat stop_bpstat;
275 /* Flag indicating that a command has proceeded the inferior past the
276 current breakpoint. */
278 extern int breakpoint_proceeded;
280 /* Nonzero if stopped due to a step command. */
282 extern int stop_step;
284 /* Nonzero if stopped due to completion of a stack dummy routine. */
286 extern int stop_stack_dummy;
288 /* Nonzero if program stopped due to a random (unexpected) signal in
291 extern int stopped_by_random_signal;
293 /* Range to single step within.
294 If this is nonzero, respond to a single-step signal
295 by continuing to step if the pc is in this range.
297 If step_range_start and step_range_end are both 1, it means to step for
298 a single instruction (FIXME: it might clean up wait_for_inferior in a
299 minor way if this were changed to the address of the instruction and
300 that address plus one. But maybe not.). */
302 extern CORE_ADDR step_range_start; /* Inclusive */
303 extern CORE_ADDR step_range_end; /* Exclusive */
305 /* Stack frame address as of when stepping command was issued.
306 This is how we know when we step into a subroutine call,
307 and how to set the frame for the breakpoint used to step out. */
309 extern struct frame_id step_frame_id;
311 /* 1 means step over all subroutine calls.
312 -1 means step over calls to undebuggable functions. */
314 enum step_over_calls_kind
318 STEP_OVER_UNDEBUGGABLE
321 extern enum step_over_calls_kind step_over_calls;
323 /* If stepping, nonzero means step count is > 1
324 so don't print frame next time inferior stops
325 if it stops due to stepping. */
327 extern int step_multi;
329 /* Anything but NO_STOP_QUIETLY means we expect a trap and the caller
330 will handle it themselves. STOP_QUIETLY is used when running in
331 the shell before the child program has been exec'd and when running
332 through shared library loading. STOP_QUIETLY_REMOTE is used when
333 setting up a remote connection; it is like STOP_QUIETLY_NO_SIGSTOP
334 except that there is no need to hide a signal. */
336 /* It is also used after attach, due to attaching to a process. This
337 is a bit trickier. When doing an attach, the kernel stops the
338 debuggee with a SIGSTOP. On newer GNU/Linux kernels (>= 2.5.61)
339 the handling of SIGSTOP for a ptraced process has changed. Earlier
340 versions of the kernel would ignore these SIGSTOPs, while now
341 SIGSTOP is treated like any other signal, i.e. it is not muffled.
343 If the gdb user does a 'continue' after the 'attach', gdb passes
344 the global variable stop_signal (which stores the signal from the
345 attach, SIGSTOP) to the ptrace(PTRACE_CONT,...) call. This is
346 problematic, because the kernel doesn't ignore such SIGSTOP
347 now. I.e. it is reported back to gdb, which in turn presents it
350 To avoid the problem, we use STOP_QUIETLY_NO_SIGSTOP, which allows
351 gdb to clear the value of stop_signal after the attach, so that it
352 is not passed back down to the kernel. */
359 STOP_QUIETLY_NO_SIGSTOP
362 extern enum stop_kind stop_soon;
364 /* Nonzero if proceed is being used for a "finish" command or a similar
365 situation when stop_registers should be saved. */
367 extern int proceed_to_finish;
369 /* Save register contents here when about to pop a stack dummy frame,
370 if-and-only-if proceed_to_finish is set.
371 Thus this contains the return value from the called function (assuming
372 values are returned in a register). */
374 extern struct regcache *stop_registers;
376 /* Nonzero if the child process in inferior_ptid was attached rather
379 extern int attach_flag;
381 /* True if we are debugging displaced stepping. */
382 extern int debug_displaced;
384 /* Dump LEN bytes at BUF in hex to FILE, followed by a newline. */
385 void displaced_step_dump_bytes (struct ui_file *file,
386 const gdb_byte *buf, size_t len);
389 /* When set, normal_stop will not call the normal_stop observer. */
390 extern int suppress_stop_observer;
392 /* When set, no calls to target_resumed observer will be made. */
393 extern int suppress_resume_observer;
396 /* Possible values for gdbarch_call_dummy_location. */
398 #define AT_ENTRY_POINT 4
401 /* If STARTUP_WITH_SHELL is set, GDB's "run"
402 will attempts to start up the debugee under a shell.
403 This is in order for argument-expansion to occur. E.g.,
405 The "*" gets expanded by the shell into a list of files.
406 While this is a nice feature, it turns out to interact badly
407 with some of the catch-fork/catch-exec features we have added.
408 In particular, if the shell does any fork/exec's before
409 the exec of the target program, that can confuse GDB.
410 To disable this feature, set STARTUP_WITH_SHELL to 0.
411 To enable this feature, set STARTUP_WITH_SHELL to 1.
412 The catch-exec traps expected during start-up will
413 be 1 if target is not started up with a shell, 2 if it is.
415 If you disable this, you need to decrement
416 START_INFERIOR_TRAPS_EXPECTED in tm.h. */
417 #define STARTUP_WITH_SHELL 1
418 #if !defined(START_INFERIOR_TRAPS_EXPECTED)
419 #define START_INFERIOR_TRAPS_EXPECTED 2
421 #endif /* !defined (INFERIOR_H) */