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b811d2c2 | 1 | /* Copyright (C) 1986-2020 Free Software Foundation, Inc. |
45741a9c PA |
2 | |
3 | This file is part of GDB. | |
4 | ||
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
7 | the Free Software Foundation; either version 3 of the License, or | |
8 | (at your option) any later version. | |
9 | ||
10 | This program is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
16 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
17 | ||
18 | #ifndef INFRUN_H | |
19 | #define INFRUN_H 1 | |
20 | ||
45741a9c | 21 | #include "symtab.h" |
268a13a5 | 22 | #include "gdbsupport/byte-vector.h" |
45741a9c PA |
23 | |
24 | struct target_waitstatus; | |
25 | struct frame_info; | |
26 | struct address_space; | |
243a9253 | 27 | struct return_value_info; |
5b6d1e4f | 28 | struct process_stratum_target; |
29734269 | 29 | struct thread_info; |
45741a9c PA |
30 | |
31 | /* True if we are debugging run control. */ | |
32 | extern unsigned int debug_infrun; | |
33 | ||
17417fb0 | 34 | /* Print an "infrun" debug statement. */ |
1eb8556f SM |
35 | |
36 | #define infrun_debug_printf(fmt, ...) \ | |
4f0469cd AB |
37 | do \ |
38 | { \ | |
39 | if (debug_infrun) \ | |
40 | debug_prefixed_printf ("infrun", __func__, fmt, ##__VA_ARGS__); \ | |
41 | } \ | |
42 | while (0) | |
1eb8556f | 43 | |
45741a9c | 44 | /* True if we are debugging displaced stepping. */ |
491144b5 | 45 | extern bool debug_displaced; |
45741a9c | 46 | |
17417fb0 | 47 | /* Print a "displaced" debug statement. */ |
136821d9 SM |
48 | |
49 | #define displaced_debug_printf(fmt, ...) \ | |
4f0469cd AB |
50 | do \ |
51 | { \ | |
52 | if (debug_displaced) \ | |
53 | debug_prefixed_printf ("displaced", __func__, fmt, ##__VA_ARGS__); \ | |
54 | } \ | |
55 | while (0) | |
136821d9 | 56 | |
45741a9c PA |
57 | /* Nonzero if we want to give control to the user when we're notified |
58 | of shared library events by the dynamic linker. */ | |
59 | extern int stop_on_solib_events; | |
60 | ||
45741a9c PA |
61 | /* True if execution commands resume all threads of all processes by |
62 | default; otherwise, resume only threads of the current inferior | |
63 | process. */ | |
491144b5 | 64 | extern bool sched_multi; |
45741a9c PA |
65 | |
66 | /* When set, stop the 'step' command if we enter a function which has | |
67 | no line number information. The normal behavior is that we step | |
68 | over such function. */ | |
491144b5 | 69 | extern bool step_stop_if_no_debug; |
45741a9c PA |
70 | |
71 | /* If set, the inferior should be controlled in non-stop mode. In | |
72 | this mode, each thread is controlled independently. Execution | |
73 | commands apply only to the selected thread by default, and stop | |
74 | events stop only the thread that had the event -- the other threads | |
75 | are kept running freely. */ | |
491144b5 | 76 | extern bool non_stop; |
45741a9c PA |
77 | |
78 | /* When set (default), the target should attempt to disable the | |
79 | operating system's address space randomization feature when | |
80 | starting an inferior. */ | |
491144b5 | 81 | extern bool disable_randomization; |
45741a9c | 82 | |
4c2f2a79 PA |
83 | /* Returns a unique identifier for the current stop. This can be used |
84 | to tell whether a command has proceeded the inferior past the | |
85 | current location. */ | |
86 | extern ULONGEST get_stop_id (void); | |
87 | ||
45741a9c PA |
88 | /* Reverse execution. */ |
89 | enum exec_direction_kind | |
90 | { | |
91 | EXEC_FORWARD, | |
92 | EXEC_REVERSE | |
93 | }; | |
94 | ||
170742de PA |
95 | /* The current execution direction. */ |
96 | extern enum exec_direction_kind execution_direction; | |
45741a9c | 97 | |
45741a9c PA |
98 | extern void start_remote (int from_tty); |
99 | ||
70509625 PA |
100 | /* Clear out all variables saying what to do when inferior is |
101 | continued or stepped. First do this, then set the ones you want, | |
102 | then call `proceed'. STEP indicates whether we're preparing for a | |
103 | step/stepi command. */ | |
104 | extern void clear_proceed_status (int step); | |
45741a9c | 105 | |
64ce06e4 | 106 | extern void proceed (CORE_ADDR, enum gdb_signal); |
45741a9c | 107 | |
70509625 | 108 | /* Return a ptid representing the set of threads that we will proceed, |
f3263aa4 PA |
109 | in the perspective of the user/frontend. We may actually resume |
110 | fewer threads at first, e.g., if a thread is stopped at a | |
111 | breakpoint that needs stepping-off, but that should not be visible | |
112 | to the user/frontend, and neither should the frontend/user be | |
113 | allowed to proceed any of the threads that happen to be stopped for | |
114 | internal run control handling, if a previous command wanted them | |
115 | resumed. */ | |
45741a9c PA |
116 | extern ptid_t user_visible_resume_ptid (int step); |
117 | ||
5b6d1e4f PA |
118 | /* Return the process_stratum target that we will proceed, in the |
119 | perspective of the user/frontend. If RESUME_PTID is | |
120 | MINUS_ONE_PTID, then we'll resume all threads of all targets, so | |
121 | the function returns NULL. Otherwise, we'll be resuming a process | |
122 | or thread of the current process, so we return the current | |
123 | inferior's process stratum target. */ | |
124 | extern process_stratum_target *user_visible_resume_target (ptid_t resume_ptid); | |
45741a9c | 125 | |
4c2f2a79 PA |
126 | /* Return control to GDB when the inferior stops for real. Print |
127 | appropriate messages, remove breakpoints, give terminal our modes, | |
128 | and run the stop hook. Returns true if the stop hook proceeded the | |
129 | target, false otherwise. */ | |
130 | extern int normal_stop (void); | |
45741a9c | 131 | |
5b6d1e4f | 132 | /* Return the cached copy of the last target/ptid/waitstatus returned |
ab1ddbcf PA |
133 | by target_wait()/deprecated_target_wait_hook(). The data is |
134 | actually cached by handle_inferior_event(), which gets called | |
135 | immediately after target_wait()/deprecated_target_wait_hook(). */ | |
5b6d1e4f PA |
136 | extern void get_last_target_status (process_stratum_target **target, |
137 | ptid_t *ptid, | |
45741a9c PA |
138 | struct target_waitstatus *status); |
139 | ||
5b6d1e4f PA |
140 | /* Set the cached copy of the last target/ptid/waitstatus. */ |
141 | extern void set_last_target_status (process_stratum_target *target, ptid_t ptid, | |
6efcd9a8 PA |
142 | struct target_waitstatus status); |
143 | ||
ab1ddbcf PA |
144 | /* Clear the cached copy of the last ptid/waitstatus returned by |
145 | target_wait(). */ | |
146 | extern void nullify_last_target_wait_ptid (); | |
147 | ||
6efcd9a8 PA |
148 | /* Stop all threads. Only returns after everything is halted. */ |
149 | extern void stop_all_threads (void); | |
150 | ||
45741a9c PA |
151 | extern void prepare_for_detach (void); |
152 | ||
b1a35af2 | 153 | extern void fetch_inferior_event (); |
45741a9c PA |
154 | |
155 | extern void init_wait_for_inferior (void); | |
156 | ||
157 | extern void insert_step_resume_breakpoint_at_sal (struct gdbarch *, | |
158 | struct symtab_and_line , | |
159 | struct frame_id); | |
160 | ||
45741a9c PA |
161 | /* Returns true if we're trying to step past the instruction at |
162 | ADDRESS in ASPACE. */ | |
163 | extern int stepping_past_instruction_at (struct address_space *aspace, | |
164 | CORE_ADDR address); | |
165 | ||
21edc42f YQ |
166 | /* Returns true if thread whose thread number is THREAD is stepping |
167 | over a breakpoint. */ | |
168 | extern int thread_is_stepping_over_breakpoint (int thread); | |
169 | ||
963f9c80 PA |
170 | /* Returns true if we're trying to step past an instruction that |
171 | triggers a non-steppable watchpoint. */ | |
172 | extern int stepping_past_nonsteppable_watchpoint (void); | |
173 | ||
29734269 SM |
174 | /* Record in TP the frame and location we're currently stepping through. */ |
175 | extern void set_step_info (thread_info *tp, | |
176 | struct frame_info *frame, | |
45741a9c PA |
177 | struct symtab_and_line sal); |
178 | ||
fd664c91 PA |
179 | /* Several print_*_reason helper functions to print why the inferior |
180 | has stopped to the passed in UIOUT. */ | |
181 | ||
182 | /* Signal received, print why the inferior has stopped. */ | |
183 | extern void print_signal_received_reason (struct ui_out *uiout, | |
184 | enum gdb_signal siggnal); | |
185 | ||
186 | /* Print why the inferior has stopped. We are done with a | |
187 | step/next/si/ni command, print why the inferior has stopped. */ | |
188 | extern void print_end_stepping_range_reason (struct ui_out *uiout); | |
189 | ||
190 | /* The inferior was terminated by a signal, print why it stopped. */ | |
191 | extern void print_signal_exited_reason (struct ui_out *uiout, | |
192 | enum gdb_signal siggnal); | |
193 | ||
194 | /* The inferior program is finished, print why it stopped. */ | |
195 | extern void print_exited_reason (struct ui_out *uiout, int exitstatus); | |
196 | ||
197 | /* Reverse execution: target ran out of history info, print why the | |
198 | inferior has stopped. */ | |
199 | extern void print_no_history_reason (struct ui_out *uiout); | |
200 | ||
243a9253 PA |
201 | /* Print the result of a function at the end of a 'finish' command. |
202 | RV points at an object representing the captured return value/type | |
203 | and its position in the value history. */ | |
204 | ||
205 | extern void print_return_value (struct ui_out *uiout, | |
206 | struct return_value_info *rv); | |
207 | ||
208 | /* Print current location without a level number, if we have changed | |
209 | functions or hit a breakpoint. Print source line if we have one. | |
4c7d57e7 TT |
210 | If the execution command captured a return value, print it. If |
211 | DISPLAYS is false, do not call 'do_displays'. */ | |
243a9253 | 212 | |
4c7d57e7 | 213 | extern void print_stop_event (struct ui_out *uiout, bool displays = true); |
45741a9c | 214 | |
221e1a37 PA |
215 | /* Pretty print the results of target_wait, for debugging purposes. */ |
216 | ||
217 | extern void print_target_wait_results (ptid_t waiton_ptid, ptid_t result_ptid, | |
218 | const struct target_waitstatus *ws); | |
219 | ||
45741a9c PA |
220 | extern int signal_stop_state (int); |
221 | ||
222 | extern int signal_print_state (int); | |
223 | ||
224 | extern int signal_pass_state (int); | |
225 | ||
226 | extern int signal_stop_update (int, int); | |
227 | ||
228 | extern int signal_print_update (int, int); | |
229 | ||
230 | extern int signal_pass_update (int, int); | |
231 | ||
232 | extern void update_signals_program_target (void); | |
233 | ||
234 | /* Clear the convenience variables associated with the exit of the | |
235 | inferior. Currently, those variables are $_exitcode and | |
236 | $_exitsignal. */ | |
237 | extern void clear_exit_convenience_vars (void); | |
238 | ||
136821d9 SM |
239 | /* Dump LEN bytes at BUF in hex to a string and return it. */ |
240 | extern std::string displaced_step_dump_bytes (const gdb_byte *buf, size_t len); | |
45741a9c PA |
241 | |
242 | extern struct displaced_step_closure *get_displaced_step_closure_by_addr | |
243 | (CORE_ADDR addr); | |
244 | ||
245 | extern void update_observer_mode (void); | |
246 | ||
247 | extern void signal_catch_update (const unsigned int *); | |
248 | ||
249 | /* In some circumstances we allow a command to specify a numeric | |
250 | signal. The idea is to keep these circumstances limited so that | |
251 | users (and scripts) develop portable habits. For comparison, | |
252 | POSIX.2 `kill' requires that 1,2,3,6,9,14, and 15 work (and using a | |
253 | numeric signal at all is obsolescent. We are slightly more lenient | |
254 | and allow 1-15 which should match host signal numbers on most | |
255 | systems. Use of symbolic signal names is strongly encouraged. */ | |
256 | enum gdb_signal gdb_signal_from_command (int num); | |
257 | ||
372316f1 PA |
258 | /* Enables/disables infrun's async event source in the event loop. */ |
259 | extern void infrun_async (int enable); | |
260 | ||
0b333c5e PA |
261 | /* Call infrun's event handler the next time through the event |
262 | loop. */ | |
263 | extern void mark_infrun_async_event_handler (void); | |
264 | ||
c2829269 PA |
265 | /* The global queue of threads that need to do a step-over operation |
266 | to get past e.g., a breakpoint. */ | |
267 | extern struct thread_info *step_over_queue_head; | |
268 | ||
388a7084 PA |
269 | /* Remove breakpoints if possible (usually that means, if everything |
270 | is stopped). On failure, print a message. */ | |
271 | extern void maybe_remove_breakpoints (void); | |
272 | ||
3b12939d PA |
273 | /* If a UI was in sync execution mode, and now isn't, restore its |
274 | prompt (a synchronous execution command has finished, and we're | |
275 | ready for input). */ | |
276 | extern void all_uis_check_sync_execution_done (void); | |
277 | ||
a8836c93 PA |
278 | /* If a UI was in sync execution mode, and hasn't displayed the prompt |
279 | yet, re-disable its prompt (a synchronous execution command was | |
280 | started or re-started). */ | |
281 | extern void all_uis_on_sync_execution_starting (void); | |
282 | ||
cfba9872 SM |
283 | /* Base class for displaced stepping closures (the arch-specific data). */ |
284 | ||
285 | struct displaced_step_closure | |
286 | { | |
287 | virtual ~displaced_step_closure () = 0; | |
288 | }; | |
289 | ||
fdb61c6c SM |
290 | using displaced_step_closure_up = std::unique_ptr<displaced_step_closure>; |
291 | ||
cfba9872 SM |
292 | /* A simple displaced step closure that contains only a byte buffer. */ |
293 | ||
294 | struct buf_displaced_step_closure : displaced_step_closure | |
295 | { | |
296 | buf_displaced_step_closure (int buf_size) | |
297 | : buf (buf_size) | |
298 | {} | |
299 | ||
300 | gdb::byte_vector buf; | |
301 | }; | |
302 | ||
d20172fc SM |
303 | /* Per-inferior displaced stepping state. */ |
304 | struct displaced_step_inferior_state | |
305 | { | |
306 | displaced_step_inferior_state () | |
307 | { | |
308 | reset (); | |
309 | } | |
310 | ||
311 | /* Put this object back in its original state. */ | |
312 | void reset () | |
313 | { | |
314 | failed_before = 0; | |
315 | step_thread = nullptr; | |
316 | step_gdbarch = nullptr; | |
d8d83535 | 317 | step_closure.reset (); |
d20172fc SM |
318 | step_original = 0; |
319 | step_copy = 0; | |
320 | step_saved_copy.clear (); | |
321 | } | |
322 | ||
323 | /* True if preparing a displaced step ever failed. If so, we won't | |
324 | try displaced stepping for this inferior again. */ | |
325 | int failed_before; | |
326 | ||
327 | /* If this is not nullptr, this is the thread carrying out a | |
328 | displaced single-step in process PID. This thread's state will | |
329 | require fixing up once it has completed its step. */ | |
330 | thread_info *step_thread; | |
331 | ||
332 | /* The architecture the thread had when we stepped it. */ | |
333 | gdbarch *step_gdbarch; | |
334 | ||
335 | /* The closure provided gdbarch_displaced_step_copy_insn, to be used | |
336 | for post-step cleanup. */ | |
fdb61c6c | 337 | displaced_step_closure_up step_closure; |
d20172fc SM |
338 | |
339 | /* The address of the original instruction, and the copy we | |
340 | made. */ | |
341 | CORE_ADDR step_original, step_copy; | |
342 | ||
343 | /* Saved contents of copy area. */ | |
344 | gdb::byte_vector step_saved_copy; | |
345 | }; | |
346 | ||
45741a9c | 347 | #endif /* INFRUN_H */ |