1 /* Variables that describe the inferior process running under GDB:
2 Where it is, why it stopped, and how to step it.
3 Copyright 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996,
4 1998, 1999, 2000, 2001 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 2 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, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
23 #if !defined (INFERIOR_H)
27 #include "breakpoint.h"
29 /* For enum target_signal. */
32 /* Structure in which to save the status of the inferior. Create/Save
33 through "save_inferior_status", restore through
34 "restore_inferior_status".
36 This pair of routines should be called around any transfer of
37 control to the inferior which you don't want showing up in your
40 struct inferior_status;
42 extern struct inferior_status *save_inferior_status (int);
44 extern void restore_inferior_status (struct inferior_status *);
46 extern struct cleanup *make_cleanup_restore_inferior_status (struct inferior_status *);
48 extern void discard_inferior_status (struct inferior_status *);
50 extern void write_inferior_status_register (struct inferior_status
51 *inf_status, int regno,
54 /* The -1 ptid, often used to indicate either an error condition
55 or a "don't care" condition, i.e, "run all threads." */
56 extern ptid_t minus_one_ptid;
58 /* The null or zero ptid, often used to indicate no process. */
59 extern ptid_t null_ptid;
61 /* Attempt to find and return an existing ptid with the given PID, LWP,
62 and TID components. If none exists, create a new one and return
64 ptid_t ptid_build (int pid, long lwp, long tid);
66 /* Find/Create a ptid from just a pid. */
67 ptid_t pid_to_ptid (int pid);
69 /* Fetch the pid (process id) component from a ptid. */
70 int ptid_get_pid (ptid_t ptid);
72 /* Fetch the lwp (lightweight process) component from a ptid. */
73 long ptid_get_lwp (ptid_t ptid);
75 /* Fetch the tid (thread id) component from a ptid. */
76 long ptid_get_tid (ptid_t ptid);
78 /* Compare two ptids to see if they are equal */
79 extern int ptid_equal (ptid_t p1, ptid_t p2);
81 /* Save value of inferior_ptid so that it may be restored by
82 a later call to do_cleanups(). Returns the struct cleanup
83 pointer needed for later doing the cleanup. */
84 extern struct cleanup * save_inferior_ptid (void);
86 extern void set_sigint_trap (void);
88 extern void clear_sigint_trap (void);
90 extern void set_sigio_trap (void);
92 extern void clear_sigio_trap (void);
94 /* File name for default use for standard in/out in the inferior. */
96 extern char *inferior_io_terminal;
98 /* Collected pid, tid, etc. of the debugged inferior. When there's
99 no inferior, PIDGET (inferior_ptid) will be 0. */
101 extern ptid_t inferior_ptid;
103 /* Is the inferior running right now, as a result of a 'run&',
104 'continue&' etc command? This is used in asycn gdb to determine
105 whether a command that the user enters while the target is running
106 is allowed or not. */
107 extern int target_executing;
109 /* Are we simulating synchronous execution? This is used in async gdb
110 to implement the 'run', 'continue' etc commands, which will not
111 redisplay the prompt until the execution is actually over. */
112 extern int sync_execution;
114 /* This is only valid when inferior_ptid is non-zero.
116 If this is 0, then exec events should be noticed and responded to
117 by the debugger (i.e., be reported to the user).
119 If this is > 0, then that many subsequent exec events should be
120 ignored (i.e., not be reported to the user).
122 extern int inferior_ignoring_startup_exec_events;
124 /* This is only valid when inferior_ignoring_startup_exec_events is
127 Some targets (stupidly) report more than one exec event per actual
128 call to an event() system call. If only the last such exec event
129 need actually be noticed and responded to by the debugger (i.e.,
130 be reported to the user), then this is the number of "leading"
131 exec events which should be ignored.
133 extern int inferior_ignoring_leading_exec_events;
135 /* Inferior environment. */
137 extern struct environ *inferior_environ;
139 extern void clear_proceed_status (void);
141 extern void proceed (CORE_ADDR, enum target_signal, int);
143 /* When set, stop the 'step' command if we enter a function which has
144 no line number information. The normal behavior is that we step
145 over such function. */
146 extern int step_stop_if_no_debug;
148 extern void kill_inferior (void);
150 extern void generic_mourn_inferior (void);
152 extern void terminal_ours (void);
154 extern int run_stack_dummy (CORE_ADDR, char *);
156 extern CORE_ADDR read_pc (void);
158 extern CORE_ADDR read_pc_pid (ptid_t);
160 extern CORE_ADDR generic_target_read_pc (ptid_t);
162 extern void write_pc (CORE_ADDR);
164 extern void write_pc_pid (CORE_ADDR, ptid_t);
166 extern void generic_target_write_pc (CORE_ADDR, ptid_t);
168 extern CORE_ADDR read_sp (void);
170 extern CORE_ADDR generic_target_read_sp (void);
172 extern void write_sp (CORE_ADDR);
174 extern void generic_target_write_sp (CORE_ADDR);
176 extern CORE_ADDR read_fp (void);
178 extern CORE_ADDR generic_target_read_fp (void);
180 extern void write_fp (CORE_ADDR);
182 extern void generic_target_write_fp (CORE_ADDR);
184 extern CORE_ADDR unsigned_pointer_to_address (struct type *type, void *buf);
186 extern void unsigned_address_to_pointer (struct type *type, void *buf,
188 extern CORE_ADDR signed_pointer_to_address (struct type *type, void *buf);
189 extern void address_to_signed_pointer (struct type *type, void *buf,
192 extern void wait_for_inferior (void);
194 extern void fetch_inferior_event (void *);
196 extern void init_wait_for_inferior (void);
198 extern void close_exec_file (void);
200 extern void reopen_exec_file (void);
202 /* The `resume' routine should only be called in special circumstances.
203 Normally, use `proceed', which handles a lot of bookkeeping. */
205 extern void resume (int, enum target_signal);
207 /* From misc files */
209 extern void do_registers_info (int, int);
211 extern void store_inferior_registers (int);
213 extern void fetch_inferior_registers (int);
215 extern void solib_create_inferior_hook (void);
217 extern void child_terminal_info (char *, int);
219 extern void term_info (char *, int);
221 extern void terminal_ours_for_output (void);
223 extern void terminal_inferior (void);
225 extern void terminal_init_inferior (void);
227 extern void terminal_init_inferior_with_pgrp (int pgrp);
229 /* From infptrace.c or infttrace.c */
231 extern int attach (int);
233 #if !defined(REQUIRE_ATTACH)
234 #define REQUIRE_ATTACH attach
237 #if !defined(REQUIRE_DETACH)
238 #define REQUIRE_DETACH(pid,siggnal) detach (siggnal)
241 extern void detach (int);
243 /* PTRACE method of waiting for inferior process. */
244 int ptrace_wait (ptid_t, int *);
246 extern void child_resume (ptid_t, int, enum target_signal);
248 #ifndef PTRACE_ARG3_TYPE
249 #define PTRACE_ARG3_TYPE int /* Correct definition for most systems. */
252 extern int call_ptrace (int, int, PTRACE_ARG3_TYPE, int);
254 extern void pre_fork_inferior (void);
258 extern int proc_iterate_over_mappings (int (*)(int, CORE_ADDR));
260 extern ptid_t procfs_first_available (void);
262 /* From fork-child.c */
264 extern void fork_inferior (char *, char *, char **,
266 void (*)(int), void (*)(void), char *);
269 extern void clone_and_follow_inferior (int, int *);
271 extern void startup_inferior (int);
275 extern void new_tty_prefork (char *);
277 extern int gdb_has_a_terminal (void);
281 extern void start_remote (void);
283 extern void normal_stop (void);
285 extern int signal_stop_state (int);
287 extern int signal_print_state (int);
289 extern int signal_pass_state (int);
291 extern int signal_stop_update (int, int);
293 extern int signal_print_update (int, int);
295 extern int signal_pass_update (int, int);
297 extern void get_last_target_status(ptid_t *ptid,
298 struct target_waitstatus *status);
302 extern void tty_command (char *, int);
304 extern void attach_command (char *, int);
306 extern char *get_inferior_args (void);
308 extern char *set_inferior_args (char *);
310 /* Last signal that the inferior received (why it stopped). */
312 extern enum target_signal stop_signal;
314 /* Address at which inferior stopped. */
316 extern CORE_ADDR stop_pc;
318 /* Chain containing status of breakpoint(s) that we have stopped at. */
320 extern bpstat stop_bpstat;
322 /* Flag indicating that a command has proceeded the inferior past the
323 current breakpoint. */
325 extern int breakpoint_proceeded;
327 /* Nonzero if stopped due to a step command. */
329 extern int stop_step;
331 /* Nonzero if stopped due to completion of a stack dummy routine. */
333 extern int stop_stack_dummy;
335 /* Nonzero if program stopped due to a random (unexpected) signal in
338 extern int stopped_by_random_signal;
340 /* Range to single step within.
341 If this is nonzero, respond to a single-step signal
342 by continuing to step if the pc is in this range.
344 If step_range_start and step_range_end are both 1, it means to step for
345 a single instruction (FIXME: it might clean up wait_for_inferior in a
346 minor way if this were changed to the address of the instruction and
347 that address plus one. But maybe not.). */
349 extern CORE_ADDR step_range_start; /* Inclusive */
350 extern CORE_ADDR step_range_end; /* Exclusive */
352 /* Stack frame address as of when stepping command was issued.
353 This is how we know when we step into a subroutine call,
354 and how to set the frame for the breakpoint used to step out. */
356 extern CORE_ADDR step_frame_address;
358 /* Our notion of the current stack pointer. */
360 extern CORE_ADDR step_sp;
362 /* 1 means step over all subroutine calls.
363 -1 means step over calls to undebuggable functions. */
365 enum step_over_calls_kind
369 STEP_OVER_UNDEBUGGABLE
372 extern enum step_over_calls_kind step_over_calls;
374 /* If stepping, nonzero means step count is > 1
375 so don't print frame next time inferior stops
376 if it stops due to stepping. */
378 extern int step_multi;
380 /* Nonzero means expecting a trap and caller will handle it themselves.
381 It is used after attach, due to attaching to a process;
382 when running in the shell before the child program has been exec'd;
383 and when running some kinds of remote stuff (FIXME?). */
385 extern int stop_soon_quietly;
387 /* Nonzero if proceed is being used for a "finish" command or a similar
388 situation when stop_registers should be saved. */
390 extern int proceed_to_finish;
392 /* Save register contents here when about to pop a stack dummy frame,
393 if-and-only-if proceed_to_finish is set.
394 Thus this contains the return value from the called function (assuming
395 values are returned in a register). */
397 extern char *stop_registers;
399 /* Nonzero if the child process in inferior_ptid was attached rather
402 extern int attach_flag;
404 /* Sigtramp is a routine that the kernel calls (which then calls the
405 signal handler). On most machines it is a library routine that
406 is linked into the executable.
408 This macro, given a program counter value and the name of the
409 function in which that PC resides (which can be null if the
410 name is not known), returns nonzero if the PC and name show
411 that we are in sigtramp.
413 On most machines just see if the name is sigtramp (and if we have
414 no name, assume we are not in sigtramp). */
415 #if !defined (IN_SIGTRAMP)
416 #if defined (SIGTRAMP_START)
417 #define IN_SIGTRAMP(pc, name) \
418 ((pc) >= SIGTRAMP_START(pc) \
419 && (pc) < SIGTRAMP_END(pc) \
422 #define IN_SIGTRAMP(pc, name) \
423 (name && STREQ ("_sigtramp", name))
427 /* Possible values for CALL_DUMMY_LOCATION. */
429 #define BEFORE_TEXT_END 2
430 #define AFTER_TEXT_END 3
431 #define AT_ENTRY_POINT 4
433 #if !defined (USE_GENERIC_DUMMY_FRAMES)
434 #define USE_GENERIC_DUMMY_FRAMES 0
437 #if !defined (CALL_DUMMY_LOCATION)
438 #define CALL_DUMMY_LOCATION ON_STACK
439 #endif /* No CALL_DUMMY_LOCATION. */
441 #if !defined (CALL_DUMMY_ADDRESS)
442 #define CALL_DUMMY_ADDRESS() (internal_error (__FILE__, __LINE__, "CALL_DUMMY_ADDRESS"), 0)
444 #if !defined (CALL_DUMMY_START_OFFSET)
445 #define CALL_DUMMY_START_OFFSET (internal_error (__FILE__, __LINE__, "CALL_DUMMY_START_OFFSET"), 0)
447 #if !defined (CALL_DUMMY_BREAKPOINT_OFFSET)
448 #define CALL_DUMMY_BREAKPOINT_OFFSET_P (0)
449 #define CALL_DUMMY_BREAKPOINT_OFFSET (internal_error (__FILE__, __LINE__, "CALL_DUMMY_BREAKPOINT_OFFSET"), 0)
451 #if !defined CALL_DUMMY_BREAKPOINT_OFFSET_P
452 #define CALL_DUMMY_BREAKPOINT_OFFSET_P (1)
454 #if !defined (CALL_DUMMY_LENGTH)
455 #define CALL_DUMMY_LENGTH (internal_error (__FILE__, __LINE__, "CALL_DUMMY_LENGTH"), 0)
458 #if defined (CALL_DUMMY_STACK_ADJUST)
459 #if !defined (CALL_DUMMY_STACK_ADJUST_P)
460 #define CALL_DUMMY_STACK_ADJUST_P (1)
463 #if !defined (CALL_DUMMY_STACK_ADJUST)
464 #define CALL_DUMMY_STACK_ADJUST (internal_error (__FILE__, __LINE__, "CALL_DUMMY_STACK_ADJUST"), 0)
466 #if !defined (CALL_DUMMY_STACK_ADJUST_P)
467 #define CALL_DUMMY_STACK_ADJUST_P (0)
470 /* FIXME: cagney/2000-04-17: gdbarch should manage this. The default
471 shouldn't be necessary. */
473 #if !defined (CALL_DUMMY_P)
474 #if defined (CALL_DUMMY)
475 #define CALL_DUMMY_P 1
477 #define CALL_DUMMY_P 0
481 #if !defined PUSH_DUMMY_FRAME
482 #define PUSH_DUMMY_FRAME (internal_error (__FILE__, __LINE__, "PUSH_DUMMY_FRAME"), 0)
485 #if !defined FIX_CALL_DUMMY
486 #define FIX_CALL_DUMMY(a1,a2,a3,a4,a5,a6,a7) (internal_error (__FILE__, __LINE__, "FIX_CALL_DUMMY"), 0)
489 #if !defined STORE_STRUCT_RETURN
490 #define STORE_STRUCT_RETURN(a1,a2) (internal_error (__FILE__, __LINE__, "STORE_STRUCT_RETURN"), 0)
494 /* Are we in a call dummy? */
496 extern int pc_in_call_dummy_before_text_end (CORE_ADDR pc, CORE_ADDR sp,
497 CORE_ADDR frame_address);
499 #if !defined (PC_IN_CALL_DUMMY) && CALL_DUMMY_LOCATION == BEFORE_TEXT_END
500 #define PC_IN_CALL_DUMMY(pc, sp, frame_address) pc_in_call_dummy_before_text_end (pc, sp, frame_address)
501 #endif /* Before text_end. */
504 extern int pc_in_call_dummy_after_text_end (CORE_ADDR pc, CORE_ADDR sp,
505 CORE_ADDR frame_address);
507 #if !defined (PC_IN_CALL_DUMMY) && CALL_DUMMY_LOCATION == AFTER_TEXT_END
508 #define PC_IN_CALL_DUMMY(pc, sp, frame_address) pc_in_call_dummy_after_text_end (pc, sp, frame_address)
512 extern int pc_in_call_dummy_on_stack (CORE_ADDR pc, CORE_ADDR sp,
513 CORE_ADDR frame_address);
515 #if !defined (PC_IN_CALL_DUMMY) && CALL_DUMMY_LOCATION == ON_STACK
516 #define PC_IN_CALL_DUMMY(pc, sp, frame_address) pc_in_call_dummy_on_stack (pc, sp, frame_address)
520 extern int pc_in_call_dummy_at_entry_point (CORE_ADDR pc, CORE_ADDR sp,
521 CORE_ADDR frame_address);
523 #if !defined (PC_IN_CALL_DUMMY) && CALL_DUMMY_LOCATION == AT_ENTRY_POINT
524 #define PC_IN_CALL_DUMMY(pc, sp, frame_address) pc_in_call_dummy_at_entry_point (pc, sp, frame_address)
528 /* It's often not enough for our clients to know whether the PC is merely
529 somewhere within the call dummy. They may need to know whether the
530 call dummy has actually completed. (For example, wait_for_inferior
531 wants to know when it should truly stop because the call dummy has
532 completed. If we're single-stepping because of slow watchpoints,
533 then we may find ourselves stopped at the entry of the call dummy,
534 and want to continue stepping until we reach the end.)
536 Note that this macro is intended for targets (like HP-UX) which
537 require more than a single breakpoint in their call dummies, and
538 therefore cannot use the CALL_DUMMY_BREAKPOINT_OFFSET mechanism.
540 If a target does define CALL_DUMMY_BREAKPOINT_OFFSET, then this
541 default implementation of CALL_DUMMY_HAS_COMPLETED is sufficient.
542 Else, a target may wish to supply an implementation that works in
543 the presense of multiple breakpoints in its call dummy.
545 #if !defined(CALL_DUMMY_HAS_COMPLETED)
546 #define CALL_DUMMY_HAS_COMPLETED(pc, sp, frame_address) \
547 PC_IN_CALL_DUMMY((pc), (sp), (frame_address))
550 /* If STARTUP_WITH_SHELL is set, GDB's "run"
551 will attempts to start up the debugee under a shell.
552 This is in order for argument-expansion to occur. E.g.,
554 The "*" gets expanded by the shell into a list of files.
555 While this is a nice feature, it turns out to interact badly
556 with some of the catch-fork/catch-exec features we have added.
557 In particular, if the shell does any fork/exec's before
558 the exec of the target program, that can confuse GDB.
559 To disable this feature, set STARTUP_WITH_SHELL to 0.
560 To enable this feature, set STARTUP_WITH_SHELL to 1.
561 The catch-exec traps expected during start-up will
562 be 1 if target is not started up with a shell, 2 if it is.
564 If you disable this, you need to decrement
565 START_INFERIOR_TRAPS_EXPECTED in tm.h. */
566 #define STARTUP_WITH_SHELL 1
567 #if !defined(START_INFERIOR_TRAPS_EXPECTED)
568 #define START_INFERIOR_TRAPS_EXPECTED 2
570 #endif /* !defined (INFERIOR_H) */