Commit | Line | Data |
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c906108c SS |
1 | /* Variables that describe the inferior process running under GDB: |
2 | Where it is, why it stopped, and how to step it. | |
1bac305b | 3 | |
6aba47ca | 4 | Copyright (C) 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, |
9b254dd1 | 5 | 1998, 1999, 2000, 2001, 2003, 2004, 2005, 2006, 2007, 2008 |
1bf1958d | 6 | Free Software Foundation, Inc. |
c906108c | 7 | |
c5aa993b | 8 | This file is part of GDB. |
c906108c | 9 | |
c5aa993b JM |
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 | |
a9762ec7 | 12 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 13 | (at your option) any later version. |
c906108c | 14 | |
c5aa993b JM |
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. | |
c906108c | 19 | |
c5aa993b | 20 | You should have received a copy of the GNU General Public License |
a9762ec7 | 21 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
22 | |
23 | #if !defined (INFERIOR_H) | |
24 | #define INFERIOR_H 1 | |
25 | ||
da3331ec AC |
26 | struct target_waitstatus; |
27 | struct frame_info; | |
28 | struct ui_file; | |
29 | struct type; | |
67a2b77e | 30 | struct gdbarch; |
72cec141 | 31 | struct regcache; |
67a2b77e | 32 | |
c906108c SS |
33 | /* For bpstat. */ |
34 | #include "breakpoint.h" | |
35 | ||
36 | /* For enum target_signal. */ | |
37 | #include "target.h" | |
38 | ||
aa0cd9c1 AC |
39 | /* For struct frame_id. */ |
40 | #include "frame.h" | |
41 | ||
7a292a7a | 42 | /* Structure in which to save the status of the inferior. Create/Save |
c906108c SS |
43 | through "save_inferior_status", restore through |
44 | "restore_inferior_status". | |
7a292a7a | 45 | |
c906108c SS |
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 | |
48 | control variables. */ | |
49 | ||
7a292a7a | 50 | struct inferior_status; |
7a292a7a | 51 | |
a14ed312 | 52 | extern struct inferior_status *save_inferior_status (int); |
7a292a7a | 53 | |
a14ed312 | 54 | extern void restore_inferior_status (struct inferior_status *); |
7a292a7a | 55 | |
74b7792f AC |
56 | extern struct cleanup *make_cleanup_restore_inferior_status (struct inferior_status *); |
57 | ||
a14ed312 | 58 | extern void discard_inferior_status (struct inferior_status *); |
7a292a7a | 59 | |
a14ed312 KB |
60 | extern void write_inferior_status_register (struct inferior_status |
61 | *inf_status, int regno, | |
62 | LONGEST val); | |
c906108c | 63 | |
ca6724c1 KB |
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; | |
67 | ||
68 | /* The null or zero ptid, often used to indicate no process. */ | |
69 | extern ptid_t null_ptid; | |
70 | ||
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 | |
73 | that. */ | |
74 | ptid_t ptid_build (int pid, long lwp, long tid); | |
75 | ||
76 | /* Find/Create a ptid from just a pid. */ | |
77 | ptid_t pid_to_ptid (int pid); | |
78 | ||
79 | /* Fetch the pid (process id) component from a ptid. */ | |
80 | int ptid_get_pid (ptid_t ptid); | |
81 | ||
82 | /* Fetch the lwp (lightweight process) component from a ptid. */ | |
83 | long ptid_get_lwp (ptid_t ptid); | |
84 | ||
85 | /* Fetch the tid (thread id) component from a ptid. */ | |
86 | long ptid_get_tid (ptid_t ptid); | |
87 | ||
88 | /* Compare two ptids to see if they are equal */ | |
89 | extern int ptid_equal (ptid_t p1, ptid_t p2); | |
90 | ||
ce696e05 KB |
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); | |
95 | ||
a14ed312 | 96 | extern void set_sigint_trap (void); |
c906108c | 97 | |
a14ed312 | 98 | extern void clear_sigint_trap (void); |
c906108c | 99 | |
a14ed312 | 100 | extern void set_sigio_trap (void); |
c906108c | 101 | |
a14ed312 | 102 | extern void clear_sigio_trap (void); |
c906108c | 103 | |
3cb3b8df | 104 | /* Set/get file name for default use for standard in/out in the inferior. */ |
c906108c | 105 | |
3cb3b8df BR |
106 | extern void set_inferior_io_terminal (const char *terminal_name); |
107 | extern const char *get_inferior_io_terminal (void); | |
c906108c | 108 | |
39f77062 KB |
109 | /* Collected pid, tid, etc. of the debugged inferior. When there's |
110 | no inferior, PIDGET (inferior_ptid) will be 0. */ | |
c906108c | 111 | |
39f77062 | 112 | extern ptid_t inferior_ptid; |
c906108c | 113 | |
43ff13b4 JM |
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; | |
118 | ||
b0f4b84b | 119 | /* Some targets (stupidly) report more than one exec event per actual |
c906108c SS |
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. | |
c5aa993b | 124 | */ |
c906108c SS |
125 | extern int inferior_ignoring_leading_exec_events; |
126 | ||
127 | /* Inferior environment. */ | |
128 | ||
1bf1958d | 129 | extern struct gdb_environ *inferior_environ; |
c906108c | 130 | |
a14ed312 | 131 | extern void clear_proceed_status (void); |
c906108c | 132 | |
a14ed312 | 133 | extern void proceed (CORE_ADDR, enum target_signal, int); |
c906108c | 134 | |
a474d7c2 PA |
135 | extern ptid_t context_switch_to (ptid_t ptid); |
136 | ||
5fbbeb29 CF |
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; | |
141 | ||
ad52ddc6 PA |
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. */ | |
147 | extern int non_stop; | |
148 | ||
a14ed312 | 149 | extern void generic_mourn_inferior (void); |
c906108c | 150 | |
a790ad35 SC |
151 | extern void terminal_save_ours (void); |
152 | ||
a14ed312 | 153 | extern void terminal_ours (void); |
c906108c | 154 | |
a14ed312 | 155 | extern CORE_ADDR read_pc (void); |
c906108c | 156 | |
a14ed312 | 157 | extern void write_pc (CORE_ADDR); |
c906108c | 158 | |
b60c417a AC |
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, | |
ac2e2ef7 | 162 | CORE_ADDR addr); |
66140c26 | 163 | extern CORE_ADDR signed_pointer_to_address (struct type *type, |
b60c417a AC |
164 | const gdb_byte *buf); |
165 | extern void address_to_signed_pointer (struct type *type, gdb_byte *buf, | |
ac2e2ef7 | 166 | CORE_ADDR addr); |
4478b372 | 167 | |
ae123ec6 | 168 | extern void wait_for_inferior (int treat_exec_as_sigtrap); |
c906108c | 169 | |
a14ed312 | 170 | extern void fetch_inferior_event (void *); |
43ff13b4 | 171 | |
a14ed312 | 172 | extern void init_wait_for_inferior (void); |
c906108c | 173 | |
a14ed312 | 174 | extern void close_exec_file (void); |
c906108c | 175 | |
a14ed312 | 176 | extern void reopen_exec_file (void); |
c906108c SS |
177 | |
178 | /* The `resume' routine should only be called in special circumstances. | |
179 | Normally, use `proceed', which handles a lot of bookkeeping. */ | |
180 | ||
a14ed312 | 181 | extern void resume (int, enum target_signal); |
c906108c SS |
182 | |
183 | /* From misc files */ | |
184 | ||
0ab7a791 AC |
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); | |
666e11c5 | 189 | |
a14ed312 | 190 | extern void child_terminal_info (char *, int); |
c906108c | 191 | |
a14ed312 | 192 | extern void term_info (char *, int); |
c906108c | 193 | |
a14ed312 | 194 | extern void terminal_ours_for_output (void); |
c906108c | 195 | |
a14ed312 | 196 | extern void terminal_inferior (void); |
c906108c | 197 | |
a14ed312 | 198 | extern void terminal_init_inferior (void); |
c906108c | 199 | |
a14ed312 | 200 | extern void terminal_init_inferior_with_pgrp (int pgrp); |
c906108c | 201 | |
c906108c SS |
202 | /* From procfs.c */ |
203 | ||
a14ed312 | 204 | extern int proc_iterate_over_mappings (int (*)(int, CORE_ADDR)); |
c906108c | 205 | |
39f77062 | 206 | extern ptid_t procfs_first_available (void); |
c906108c | 207 | |
c906108c SS |
208 | /* From fork-child.c */ |
209 | ||
a14ed312 KB |
210 | extern void fork_inferior (char *, char *, char **, |
211 | void (*)(void), | |
212 | void (*)(int), void (*)(void), char *); | |
c906108c SS |
213 | |
214 | ||
a14ed312 | 215 | extern void startup_inferior (int); |
c906108c | 216 | |
552c04a7 TT |
217 | extern char *construct_inferior_arguments (struct gdbarch *, int, char **); |
218 | ||
c906108c SS |
219 | /* From inflow.c */ |
220 | ||
3cb3b8df | 221 | extern void new_tty_prefork (const char *); |
c906108c | 222 | |
a14ed312 | 223 | extern int gdb_has_a_terminal (void); |
c906108c SS |
224 | |
225 | /* From infrun.c */ | |
226 | ||
8621d6a9 | 227 | extern void start_remote (int from_tty); |
c906108c | 228 | |
a14ed312 | 229 | extern void normal_stop (void); |
c906108c | 230 | |
a14ed312 | 231 | extern int signal_stop_state (int); |
c906108c | 232 | |
a14ed312 | 233 | extern int signal_print_state (int); |
c906108c | 234 | |
a14ed312 | 235 | extern int signal_pass_state (int); |
c906108c | 236 | |
a14ed312 | 237 | extern int signal_stop_update (int, int); |
d4f3574e | 238 | |
a14ed312 | 239 | extern int signal_print_update (int, int); |
d4f3574e | 240 | |
a14ed312 | 241 | extern int signal_pass_update (int, int); |
d4f3574e | 242 | |
39f77062 KB |
243 | extern void get_last_target_status(ptid_t *ptid, |
244 | struct target_waitstatus *status); | |
e02bc4cc | 245 | |
6604731b DJ |
246 | extern void follow_inferior_reset_breakpoints (void); |
247 | ||
94cc34af PA |
248 | /* Throw an error indicating the current thread is running. */ |
249 | extern void error_is_running (void); | |
250 | ||
251 | /* Calls error_is_running if the current thread is running. */ | |
252 | extern void ensure_not_running (void); | |
253 | ||
c906108c SS |
254 | /* From infcmd.c */ |
255 | ||
a14ed312 | 256 | extern void tty_command (char *, int); |
c906108c | 257 | |
281b533b DJ |
258 | extern void post_create_inferior (struct target_ops *, int); |
259 | ||
a14ed312 | 260 | extern void attach_command (char *, int); |
c906108c | 261 | |
a250df2e | 262 | extern char *get_inferior_args (void); |
07091751 | 263 | |
a250df2e | 264 | extern char *set_inferior_args (char *); |
07091751 | 265 | |
552c04a7 TT |
266 | extern void set_inferior_args_vector (int, char **); |
267 | ||
36dc181b EZ |
268 | extern void registers_info (char *, int); |
269 | ||
270 | extern void nexti_command (char *, int); | |
271 | ||
272 | extern void stepi_command (char *, int); | |
273 | ||
274 | extern void continue_command (char *, int); | |
275 | ||
276 | extern void interrupt_target_command (char *args, int from_tty); | |
277 | ||
c906108c SS |
278 | /* Last signal that the inferior received (why it stopped). */ |
279 | ||
280 | extern enum target_signal stop_signal; | |
281 | ||
282 | /* Address at which inferior stopped. */ | |
283 | ||
284 | extern CORE_ADDR stop_pc; | |
285 | ||
286 | /* Chain containing status of breakpoint(s) that we have stopped at. */ | |
287 | ||
288 | extern bpstat stop_bpstat; | |
289 | ||
290 | /* Flag indicating that a command has proceeded the inferior past the | |
291 | current breakpoint. */ | |
292 | ||
293 | extern int breakpoint_proceeded; | |
294 | ||
295 | /* Nonzero if stopped due to a step command. */ | |
296 | ||
297 | extern int stop_step; | |
298 | ||
299 | /* Nonzero if stopped due to completion of a stack dummy routine. */ | |
300 | ||
301 | extern int stop_stack_dummy; | |
302 | ||
303 | /* Nonzero if program stopped due to a random (unexpected) signal in | |
304 | inferior process. */ | |
305 | ||
306 | extern int stopped_by_random_signal; | |
307 | ||
308 | /* Range to single step within. | |
309 | If this is nonzero, respond to a single-step signal | |
310 | by continuing to step if the pc is in this range. | |
311 | ||
312 | If step_range_start and step_range_end are both 1, it means to step for | |
313 | a single instruction (FIXME: it might clean up wait_for_inferior in a | |
314 | minor way if this were changed to the address of the instruction and | |
315 | that address plus one. But maybe not.). */ | |
316 | ||
317 | extern CORE_ADDR step_range_start; /* Inclusive */ | |
c5aa993b | 318 | extern CORE_ADDR step_range_end; /* Exclusive */ |
c906108c SS |
319 | |
320 | /* Stack frame address as of when stepping command was issued. | |
321 | This is how we know when we step into a subroutine call, | |
322 | and how to set the frame for the breakpoint used to step out. */ | |
323 | ||
aa0cd9c1 | 324 | extern struct frame_id step_frame_id; |
c906108c | 325 | |
c906108c SS |
326 | /* 1 means step over all subroutine calls. |
327 | -1 means step over calls to undebuggable functions. */ | |
328 | ||
5fbbeb29 CF |
329 | enum step_over_calls_kind |
330 | { | |
331 | STEP_OVER_NONE, | |
332 | STEP_OVER_ALL, | |
a4acd088 CF |
333 | STEP_OVER_UNDEBUGGABLE |
334 | }; | |
335 | ||
336 | extern enum step_over_calls_kind step_over_calls; | |
c906108c SS |
337 | |
338 | /* If stepping, nonzero means step count is > 1 | |
339 | so don't print frame next time inferior stops | |
340 | if it stops due to stepping. */ | |
341 | ||
342 | extern int step_multi; | |
343 | ||
b0f4b84b DJ |
344 | /* Anything but NO_STOP_QUIETLY means we expect a trap and the caller |
345 | will handle it themselves. STOP_QUIETLY is used when running in | |
346 | the shell before the child program has been exec'd and when running | |
347 | through shared library loading. STOP_QUIETLY_REMOTE is used when | |
348 | setting up a remote connection; it is like STOP_QUIETLY_NO_SIGSTOP | |
349 | except that there is no need to hide a signal. */ | |
c54cfec8 EZ |
350 | |
351 | /* It is also used after attach, due to attaching to a process. This | |
352 | is a bit trickier. When doing an attach, the kernel stops the | |
353 | debuggee with a SIGSTOP. On newer GNU/Linux kernels (>= 2.5.61) | |
354 | the handling of SIGSTOP for a ptraced process has changed. Earlier | |
355 | versions of the kernel would ignore these SIGSTOPs, while now | |
356 | SIGSTOP is treated like any other signal, i.e. it is not muffled. | |
357 | ||
358 | If the gdb user does a 'continue' after the 'attach', gdb passes | |
359 | the global variable stop_signal (which stores the signal from the | |
360 | attach, SIGSTOP) to the ptrace(PTRACE_CONT,...) call. This is | |
361 | problematic, because the kernel doesn't ignore such SIGSTOP | |
362 | now. I.e. it is reported back to gdb, which in turn presents it | |
363 | back to the user. | |
364 | ||
365 | To avoid the problem, we use STOP_QUIETLY_NO_SIGSTOP, which allows | |
366 | gdb to clear the value of stop_signal after the attach, so that it | |
367 | is not passed back down to the kernel. */ | |
368 | ||
369 | enum stop_kind | |
370 | { | |
371 | NO_STOP_QUIETLY = 0, | |
372 | STOP_QUIETLY, | |
b0f4b84b | 373 | STOP_QUIETLY_REMOTE, |
c54cfec8 EZ |
374 | STOP_QUIETLY_NO_SIGSTOP |
375 | }; | |
c906108c | 376 | |
c0236d92 | 377 | extern enum stop_kind stop_soon; |
c906108c SS |
378 | |
379 | /* Nonzero if proceed is being used for a "finish" command or a similar | |
380 | situation when stop_registers should be saved. */ | |
381 | ||
382 | extern int proceed_to_finish; | |
383 | ||
384 | /* Save register contents here when about to pop a stack dummy frame, | |
385 | if-and-only-if proceed_to_finish is set. | |
386 | Thus this contains the return value from the called function (assuming | |
387 | values are returned in a register). */ | |
388 | ||
72cec141 | 389 | extern struct regcache *stop_registers; |
c906108c | 390 | |
39f77062 | 391 | /* Nonzero if the child process in inferior_ptid was attached rather |
c906108c SS |
392 | than forked. */ |
393 | ||
394 | extern int attach_flag; | |
237fc4c9 PA |
395 | |
396 | /* True if we are debugging displaced stepping. */ | |
397 | extern int debug_displaced; | |
398 | ||
399 | /* Dump LEN bytes at BUF in hex to FILE, followed by a newline. */ | |
400 | void displaced_step_dump_bytes (struct ui_file *file, | |
401 | const gdb_byte *buf, size_t len); | |
402 | ||
f5871ec0 VP |
403 | |
404 | /* When set, normal_stop will not call the normal_stop observer. */ | |
8f6a8e84 VP |
405 | extern int suppress_stop_observer; |
406 | ||
407 | /* When set, no calls to target_resumed observer will be made. */ | |
408 | extern int suppress_resume_observer; | |
409 | ||
c906108c | 410 | \f |
faaf634c | 411 | /* Possible values for gdbarch_call_dummy_location. */ |
c906108c | 412 | #define ON_STACK 1 |
c906108c | 413 | #define AT_ENTRY_POINT 4 |
9710e734 | 414 | #define AT_SYMBOL 5 |
c906108c | 415 | |
c906108c SS |
416 | /* If STARTUP_WITH_SHELL is set, GDB's "run" |
417 | will attempts to start up the debugee under a shell. | |
418 | This is in order for argument-expansion to occur. E.g., | |
419 | (gdb) run * | |
420 | The "*" gets expanded by the shell into a list of files. | |
421 | While this is a nice feature, it turns out to interact badly | |
422 | with some of the catch-fork/catch-exec features we have added. | |
423 | In particular, if the shell does any fork/exec's before | |
424 | the exec of the target program, that can confuse GDB. | |
425 | To disable this feature, set STARTUP_WITH_SHELL to 0. | |
426 | To enable this feature, set STARTUP_WITH_SHELL to 1. | |
427 | The catch-exec traps expected during start-up will | |
428 | be 1 if target is not started up with a shell, 2 if it is. | |
429 | - RT | |
430 | If you disable this, you need to decrement | |
431 | START_INFERIOR_TRAPS_EXPECTED in tm.h. */ | |
432 | #define STARTUP_WITH_SHELL 1 | |
433 | #if !defined(START_INFERIOR_TRAPS_EXPECTED) | |
434 | #define START_INFERIOR_TRAPS_EXPECTED 2 | |
435 | #endif | |
436 | #endif /* !defined (INFERIOR_H) */ |