Commit | Line | Data |
---|---|---|
3aa6856a | 1 | /* Target-struct-independent code to start (run) and stop an inferior process. |
fcbc95a7 | 2 | Copyright 1986, 1987, 1988, 1989, 1991, 1992, 1993, 1994 |
101b7f9c | 3 | Free Software Foundation, Inc. |
bd5635a1 RP |
4 | |
5 | This file is part of GDB. | |
6 | ||
3b271cf4 | 7 | This program is free software; you can redistribute it and/or modify |
bd5635a1 | 8 | it under the terms of the GNU General Public License as published by |
3b271cf4 JG |
9 | the Free Software Foundation; either version 2 of the License, or |
10 | (at your option) any later version. | |
bd5635a1 | 11 | |
3b271cf4 | 12 | This program is distributed in the hope that it will be useful, |
bd5635a1 RP |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
3b271cf4 JG |
18 | along with this program; if not, write to the Free Software |
19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
bd5635a1 | 20 | |
bd5635a1 | 21 | #include "defs.h" |
d747e0af | 22 | #include <string.h> |
a6b98cb9 | 23 | #include <ctype.h> |
bd5635a1 RP |
24 | #include "symtab.h" |
25 | #include "frame.h" | |
26 | #include "inferior.h" | |
27 | #include "breakpoint.h" | |
28 | #include "wait.h" | |
29 | #include "gdbcore.h" | |
3950a34e | 30 | #include "gdbcmd.h" |
bd5635a1 | 31 | #include "target.h" |
100f92e2 | 32 | #include "thread.h" |
1c95d7ab | 33 | #include "annotate.h" |
bd5635a1 RP |
34 | |
35 | #include <signal.h> | |
36 | ||
37 | /* unistd.h is needed to #define X_OK */ | |
38 | #ifdef USG | |
39 | #include <unistd.h> | |
40 | #else | |
41 | #include <sys/file.h> | |
42 | #endif | |
43 | ||
30875e1c | 44 | /* Prototypes for local functions */ |
bd5635a1 | 45 | |
4cc1b3f7 | 46 | static void signals_info PARAMS ((char *, int)); |
619fd145 | 47 | |
4cc1b3f7 | 48 | static void handle_command PARAMS ((char *, int)); |
30875e1c | 49 | |
67ac9759 | 50 | static void sig_print_info PARAMS ((enum target_signal)); |
30875e1c | 51 | |
4cc1b3f7 | 52 | static void sig_print_header PARAMS ((void)); |
30875e1c | 53 | |
4cc1b3f7 | 54 | static void resume_cleanups PARAMS ((int)); |
30875e1c | 55 | |
4cc1b3f7 | 56 | static int hook_stop_stub PARAMS ((char *)); |
3950a34e | 57 | |
30875e1c SG |
58 | /* GET_LONGJMP_TARGET returns the PC at which longjmp() will resume the |
59 | program. It needs to examine the jmp_buf argument and extract the PC | |
60 | from it. The return value is non-zero on success, zero otherwise. */ | |
4cc1b3f7 | 61 | |
30875e1c SG |
62 | #ifndef GET_LONGJMP_TARGET |
63 | #define GET_LONGJMP_TARGET(PC_ADDR) 0 | |
64 | #endif | |
65 | ||
d747e0af MT |
66 | |
67 | /* Some machines have trampoline code that sits between function callers | |
68 | and the actual functions themselves. If this machine doesn't have | |
69 | such things, disable their processing. */ | |
4cc1b3f7 | 70 | |
d747e0af MT |
71 | #ifndef SKIP_TRAMPOLINE_CODE |
72 | #define SKIP_TRAMPOLINE_CODE(pc) 0 | |
73 | #endif | |
74 | ||
1eeba686 | 75 | /* For SVR4 shared libraries, each call goes through a small piece of |
4cc1b3f7 | 76 | trampoline code in the ".plt" section. IN_SOLIB_CALL_TRAMPOLINE evaluates |
1eeba686 | 77 | to nonzero if we are current stopped in one of these. */ |
4cc1b3f7 JK |
78 | |
79 | #ifndef IN_SOLIB_CALL_TRAMPOLINE | |
80 | #define IN_SOLIB_CALL_TRAMPOLINE(pc,name) 0 | |
81 | #endif | |
82 | ||
83 | /* In some shared library schemes, the return path from a shared library | |
84 | call may need to go through a trampoline too. */ | |
85 | ||
86 | #ifndef IN_SOLIB_RETURN_TRAMPOLINE | |
87 | #define IN_SOLIB_RETURN_TRAMPOLINE(pc,name) 0 | |
1eeba686 | 88 | #endif |
d747e0af | 89 | |
9f739abd SG |
90 | /* On some systems, the PC may be left pointing at an instruction that won't |
91 | actually be executed. This is usually indicated by a bit in the PSW. If | |
92 | we find ourselves in such a state, then we step the target beyond the | |
93 | nullified instruction before returning control to the user so as to avoid | |
94 | confusion. */ | |
95 | ||
96 | #ifndef INSTRUCTION_NULLIFIED | |
97 | #define INSTRUCTION_NULLIFIED 0 | |
98 | #endif | |
99 | ||
bd5635a1 RP |
100 | /* Tables of how to react to signals; the user sets them. */ |
101 | ||
072b552a JG |
102 | static unsigned char *signal_stop; |
103 | static unsigned char *signal_print; | |
104 | static unsigned char *signal_program; | |
105 | ||
106 | #define SET_SIGS(nsigs,sigs,flags) \ | |
107 | do { \ | |
108 | int signum = (nsigs); \ | |
109 | while (signum-- > 0) \ | |
110 | if ((sigs)[signum]) \ | |
111 | (flags)[signum] = 1; \ | |
112 | } while (0) | |
113 | ||
114 | #define UNSET_SIGS(nsigs,sigs,flags) \ | |
115 | do { \ | |
116 | int signum = (nsigs); \ | |
117 | while (signum-- > 0) \ | |
118 | if ((sigs)[signum]) \ | |
119 | (flags)[signum] = 0; \ | |
120 | } while (0) | |
bd5635a1 | 121 | |
3950a34e RP |
122 | |
123 | /* Command list pointer for the "stop" placeholder. */ | |
124 | ||
125 | static struct cmd_list_element *stop_command; | |
126 | ||
bd5635a1 | 127 | /* Nonzero if breakpoints are now inserted in the inferior. */ |
bd5635a1 | 128 | |
3950a34e | 129 | static int breakpoints_inserted; |
bd5635a1 RP |
130 | |
131 | /* Function inferior was in as of last step command. */ | |
132 | ||
133 | static struct symbol *step_start_function; | |
134 | ||
bd5635a1 RP |
135 | /* Nonzero if we are expecting a trace trap and should proceed from it. */ |
136 | ||
137 | static int trap_expected; | |
138 | ||
c66ed884 | 139 | #ifdef HP_OS_BUG |
bd5635a1 RP |
140 | /* Nonzero if the next time we try to continue the inferior, it will |
141 | step one instruction and generate a spurious trace trap. | |
142 | This is used to compensate for a bug in HP-UX. */ | |
143 | ||
144 | static int trap_expected_after_continue; | |
c66ed884 | 145 | #endif |
bd5635a1 RP |
146 | |
147 | /* Nonzero means expecting a trace trap | |
148 | and should stop the inferior and return silently when it happens. */ | |
149 | ||
150 | int stop_after_trap; | |
151 | ||
152 | /* Nonzero means expecting a trap and caller will handle it themselves. | |
153 | It is used after attach, due to attaching to a process; | |
154 | when running in the shell before the child program has been exec'd; | |
155 | and when running some kinds of remote stuff (FIXME?). */ | |
156 | ||
157 | int stop_soon_quietly; | |
158 | ||
bd5635a1 RP |
159 | /* Nonzero if proceed is being used for a "finish" command or a similar |
160 | situation when stop_registers should be saved. */ | |
161 | ||
162 | int proceed_to_finish; | |
163 | ||
164 | /* Save register contents here when about to pop a stack dummy frame, | |
165 | if-and-only-if proceed_to_finish is set. | |
166 | Thus this contains the return value from the called function (assuming | |
167 | values are returned in a register). */ | |
168 | ||
169 | char stop_registers[REGISTER_BYTES]; | |
170 | ||
171 | /* Nonzero if program stopped due to error trying to insert breakpoints. */ | |
172 | ||
173 | static int breakpoints_failed; | |
174 | ||
175 | /* Nonzero after stop if current stack frame should be printed. */ | |
176 | ||
177 | static int stop_print_frame; | |
178 | ||
179 | #ifdef NO_SINGLE_STEP | |
180 | extern int one_stepped; /* From machine dependent code */ | |
181 | extern void single_step (); /* Same. */ | |
182 | #endif /* NO_SINGLE_STEP */ | |
183 | ||
a71d17b1 JK |
184 | \f |
185 | /* Things to clean up if we QUIT out of resume (). */ | |
e1ce8aa5 | 186 | /* ARGSUSED */ |
a71d17b1 JK |
187 | static void |
188 | resume_cleanups (arg) | |
189 | int arg; | |
190 | { | |
191 | normal_stop (); | |
192 | } | |
193 | ||
194 | /* Resume the inferior, but allow a QUIT. This is useful if the user | |
195 | wants to interrupt some lengthy single-stepping operation | |
196 | (for child processes, the SIGINT goes to the inferior, and so | |
197 | we get a SIGINT random_signal, but for remote debugging and perhaps | |
198 | other targets, that's not true). | |
199 | ||
200 | STEP nonzero if we should step (zero to continue instead). | |
201 | SIG is the signal to give the inferior (zero for none). */ | |
310cc570 | 202 | void |
a71d17b1 JK |
203 | resume (step, sig) |
204 | int step; | |
67ac9759 | 205 | enum target_signal sig; |
a71d17b1 JK |
206 | { |
207 | struct cleanup *old_cleanups = make_cleanup (resume_cleanups, 0); | |
208 | QUIT; | |
d11c44f1 | 209 | |
cef4c2e7 PS |
210 | #ifdef CANNOT_STEP_BREAKPOINT |
211 | /* Most targets can step a breakpoint instruction, thus executing it | |
212 | normally. But if this one cannot, just continue and we will hit | |
213 | it anyway. */ | |
214 | if (step && breakpoints_inserted && breakpoint_here_p (read_pc ())) | |
215 | step = 0; | |
216 | #endif | |
217 | ||
d11c44f1 JG |
218 | #ifdef NO_SINGLE_STEP |
219 | if (step) { | |
818de002 | 220 | single_step(sig); /* Do it the hard way, w/temp breakpoints */ |
d11c44f1 JG |
221 | step = 0; /* ...and don't ask hardware to do it. */ |
222 | } | |
223 | #endif | |
224 | ||
bdbd5f50 JG |
225 | /* Handle any optimized stores to the inferior NOW... */ |
226 | #ifdef DO_DEFERRED_STORES | |
227 | DO_DEFERRED_STORES; | |
228 | #endif | |
229 | ||
2f1c7c3f JK |
230 | /* Install inferior's terminal modes. */ |
231 | target_terminal_inferior (); | |
232 | ||
de43d7d0 | 233 | target_resume (-1, step, sig); |
a71d17b1 JK |
234 | discard_cleanups (old_cleanups); |
235 | } | |
236 | ||
bd5635a1 RP |
237 | \f |
238 | /* Clear out all variables saying what to do when inferior is continued. | |
239 | First do this, then set the ones you want, then call `proceed'. */ | |
240 | ||
241 | void | |
242 | clear_proceed_status () | |
243 | { | |
244 | trap_expected = 0; | |
245 | step_range_start = 0; | |
246 | step_range_end = 0; | |
247 | step_frame_address = 0; | |
248 | step_over_calls = -1; | |
bd5635a1 RP |
249 | stop_after_trap = 0; |
250 | stop_soon_quietly = 0; | |
251 | proceed_to_finish = 0; | |
252 | breakpoint_proceeded = 1; /* We're about to proceed... */ | |
253 | ||
254 | /* Discard any remaining commands or status from previous stop. */ | |
255 | bpstat_clear (&stop_bpstat); | |
256 | } | |
257 | ||
258 | /* Basic routine for continuing the program in various fashions. | |
259 | ||
260 | ADDR is the address to resume at, or -1 for resume where stopped. | |
261 | SIGGNAL is the signal to give it, or 0 for none, | |
262 | or -1 for act according to how it stopped. | |
263 | STEP is nonzero if should trap after one instruction. | |
264 | -1 means return after that and print nothing. | |
265 | You should probably set various step_... variables | |
266 | before calling here, if you are stepping. | |
267 | ||
268 | You should call clear_proceed_status before calling proceed. */ | |
269 | ||
270 | void | |
271 | proceed (addr, siggnal, step) | |
272 | CORE_ADDR addr; | |
67ac9759 | 273 | enum target_signal siggnal; |
bd5635a1 RP |
274 | int step; |
275 | { | |
276 | int oneproc = 0; | |
277 | ||
278 | if (step > 0) | |
279 | step_start_function = find_pc_function (read_pc ()); | |
280 | if (step < 0) | |
281 | stop_after_trap = 1; | |
282 | ||
bdbd5f50 | 283 | if (addr == (CORE_ADDR)-1) |
bd5635a1 RP |
284 | { |
285 | /* If there is a breakpoint at the address we will resume at, | |
286 | step one instruction before inserting breakpoints | |
287 | so that we do not stop right away. */ | |
288 | ||
37c99ddb | 289 | if (breakpoint_here_p (read_pc ())) |
bd5635a1 | 290 | oneproc = 1; |
b5aff268 JK |
291 | |
292 | #ifdef STEP_SKIPS_DELAY | |
293 | /* Check breakpoint_here_p first, because breakpoint_here_p is fast | |
294 | (it just checks internal GDB data structures) and STEP_SKIPS_DELAY | |
295 | is slow (it needs to read memory from the target). */ | |
296 | if (breakpoint_here_p (read_pc () + 4) | |
297 | && STEP_SKIPS_DELAY (read_pc ())) | |
298 | oneproc = 1; | |
299 | #endif /* STEP_SKIPS_DELAY */ | |
bd5635a1 RP |
300 | } |
301 | else | |
101b7f9c | 302 | write_pc (addr); |
bd5635a1 | 303 | |
320f93f7 SG |
304 | #ifdef PREPARE_TO_PROCEED |
305 | /* In a multi-threaded task we may select another thread and then continue. | |
306 | ||
307 | In this case the thread that stopped at a breakpoint will immediately | |
308 | cause another stop, if it is not stepped over first. On the other hand, | |
309 | if (ADDR != -1) we only want to single step over the breakpoint if we did | |
310 | switch to another thread. | |
311 | ||
312 | If we are single stepping, don't do any of the above. | |
313 | (Note that in the current implementation single stepping another | |
314 | thread after a breakpoint and then continuing will cause the original | |
315 | breakpoint to be hit again, but you can always continue, so it's not | |
316 | a big deal.) */ | |
317 | ||
479f0f18 | 318 | if (! step && PREPARE_TO_PROCEED (1) && breakpoint_here_p (read_pc ())) |
320f93f7 SG |
319 | oneproc = 1; |
320 | #endif /* PREPARE_TO_PROCEED */ | |
321 | ||
c66ed884 | 322 | #ifdef HP_OS_BUG |
bd5635a1 RP |
323 | if (trap_expected_after_continue) |
324 | { | |
325 | /* If (step == 0), a trap will be automatically generated after | |
326 | the first instruction is executed. Force step one | |
327 | instruction to clear this condition. This should not occur | |
328 | if step is nonzero, but it is harmless in that case. */ | |
329 | oneproc = 1; | |
330 | trap_expected_after_continue = 0; | |
331 | } | |
c66ed884 | 332 | #endif /* HP_OS_BUG */ |
bd5635a1 RP |
333 | |
334 | if (oneproc) | |
335 | /* We will get a trace trap after one instruction. | |
336 | Continue it automatically and insert breakpoints then. */ | |
337 | trap_expected = 1; | |
338 | else | |
339 | { | |
340 | int temp = insert_breakpoints (); | |
341 | if (temp) | |
342 | { | |
343 | print_sys_errmsg ("ptrace", temp); | |
344 | error ("Cannot insert breakpoints.\n\ | |
345 | The same program may be running in another process."); | |
346 | } | |
347 | breakpoints_inserted = 1; | |
348 | } | |
349 | ||
fcbc95a7 | 350 | if (siggnal != TARGET_SIGNAL_DEFAULT) |
bd5635a1 RP |
351 | stop_signal = siggnal; |
352 | /* If this signal should not be seen by program, | |
353 | give it zero. Used for debugging signals. */ | |
67ac9759 | 354 | else if (!signal_program[stop_signal]) |
fcbc95a7 | 355 | stop_signal = TARGET_SIGNAL_0; |
bd5635a1 | 356 | |
1c95d7ab JK |
357 | annotate_starting (); |
358 | ||
c66ed884 SG |
359 | /* Make sure that output from GDB appears before output from the |
360 | inferior. */ | |
361 | gdb_flush (gdb_stdout); | |
362 | ||
bd5635a1 | 363 | /* Resume inferior. */ |
a71d17b1 | 364 | resume (oneproc || step || bpstat_should_step (), stop_signal); |
bd5635a1 RP |
365 | |
366 | /* Wait for it to stop (if not standalone) | |
367 | and in any case decode why it stopped, and act accordingly. */ | |
368 | ||
369 | wait_for_inferior (); | |
370 | normal_stop (); | |
371 | } | |
372 | ||
bd5635a1 RP |
373 | /* Record the pc and sp of the program the last time it stopped. |
374 | These are just used internally by wait_for_inferior, but need | |
375 | to be preserved over calls to it and cleared when the inferior | |
376 | is started. */ | |
377 | static CORE_ADDR prev_pc; | |
bd5635a1 RP |
378 | static CORE_ADDR prev_func_start; |
379 | static char *prev_func_name; | |
380 | ||
a71d17b1 | 381 | \f |
bd5635a1 RP |
382 | /* Start remote-debugging of a machine over a serial link. */ |
383 | ||
384 | void | |
385 | start_remote () | |
386 | { | |
4cc1b3f7 | 387 | init_thread_list (); |
bd5635a1 RP |
388 | init_wait_for_inferior (); |
389 | clear_proceed_status (); | |
390 | stop_soon_quietly = 1; | |
391 | trap_expected = 0; | |
98885d76 JK |
392 | wait_for_inferior (); |
393 | normal_stop (); | |
bd5635a1 RP |
394 | } |
395 | ||
396 | /* Initialize static vars when a new inferior begins. */ | |
397 | ||
398 | void | |
399 | init_wait_for_inferior () | |
400 | { | |
401 | /* These are meaningless until the first time through wait_for_inferior. */ | |
402 | prev_pc = 0; | |
bd5635a1 RP |
403 | prev_func_start = 0; |
404 | prev_func_name = NULL; | |
405 | ||
c66ed884 | 406 | #ifdef HP_OS_BUG |
bd5635a1 | 407 | trap_expected_after_continue = 0; |
c66ed884 | 408 | #endif |
bd5635a1 | 409 | breakpoints_inserted = 0; |
cf3e377e | 410 | breakpoint_init_inferior (); |
67ac9759 JK |
411 | |
412 | /* Don't confuse first call to proceed(). */ | |
413 | stop_signal = TARGET_SIGNAL_0; | |
bd5635a1 RP |
414 | } |
415 | ||
fe675038 JK |
416 | static void |
417 | delete_breakpoint_current_contents (arg) | |
418 | PTR arg; | |
419 | { | |
420 | struct breakpoint **breakpointp = (struct breakpoint **)arg; | |
421 | if (*breakpointp != NULL) | |
422 | delete_breakpoint (*breakpointp); | |
423 | } | |
bd5635a1 RP |
424 | \f |
425 | /* Wait for control to return from inferior to debugger. | |
426 | If inferior gets a signal, we may decide to start it up again | |
427 | instead of returning. That is why there is a loop in this function. | |
428 | When this function actually returns it means the inferior | |
429 | should be left stopped and GDB should read more commands. */ | |
430 | ||
431 | void | |
432 | wait_for_inferior () | |
433 | { | |
fe675038 | 434 | struct cleanup *old_cleanups; |
67ac9759 | 435 | struct target_waitstatus w; |
bd5635a1 RP |
436 | int another_trap; |
437 | int random_signal; | |
bd5635a1 | 438 | CORE_ADDR stop_func_start; |
67ac9759 | 439 | CORE_ADDR stop_func_end; |
bd5635a1 | 440 | char *stop_func_name; |
37c99ddb | 441 | CORE_ADDR prologue_pc = 0, tmp; |
bd5635a1 RP |
442 | struct symtab_and_line sal; |
443 | int remove_breakpoints_on_following_step = 0; | |
b3b39c0c | 444 | int current_line; |
b2f03c30 | 445 | struct symtab *current_symtab; |
30875e1c | 446 | int handling_longjmp = 0; /* FIXME */ |
fe675038 | 447 | struct breakpoint *step_resume_breakpoint = NULL; |
bcc37718 | 448 | struct breakpoint *through_sigtramp_breakpoint = NULL; |
37c99ddb | 449 | int pid; |
479f0f18 | 450 | int update_step_sp = 0; |
bd5635a1 | 451 | |
fe675038 JK |
452 | old_cleanups = make_cleanup (delete_breakpoint_current_contents, |
453 | &step_resume_breakpoint); | |
bcc37718 JK |
454 | make_cleanup (delete_breakpoint_current_contents, |
455 | &through_sigtramp_breakpoint); | |
b3b39c0c SG |
456 | sal = find_pc_line(prev_pc, 0); |
457 | current_line = sal.line; | |
b2f03c30 | 458 | current_symtab = sal.symtab; |
b3b39c0c | 459 | |
cb6b0202 | 460 | /* Are we stepping? */ |
bcc37718 JK |
461 | #define CURRENTLY_STEPPING() \ |
462 | ((through_sigtramp_breakpoint == NULL \ | |
463 | && !handling_longjmp \ | |
464 | && ((step_range_end && step_resume_breakpoint == NULL) \ | |
465 | || trap_expected)) \ | |
466 | || bpstat_should_step ()) | |
cb6b0202 | 467 | |
bd5635a1 RP |
468 | while (1) |
469 | { | |
320f93f7 SG |
470 | /* We have to invalidate the registers BEFORE calling target_wait because |
471 | they can be loaded from the target while in target_wait. This makes | |
472 | remote debugging a bit more efficient for those targets that provide | |
473 | critical registers as part of their normal status mechanism. */ | |
474 | ||
475 | registers_changed (); | |
476 | ||
479f0f18 SG |
477 | if (target_wait_hook) |
478 | pid = target_wait_hook (-1, &w); | |
479 | else | |
480 | pid = target_wait (-1, &w); | |
1c95d7ab | 481 | |
bd5635a1 | 482 | flush_cached_frames (); |
320f93f7 SG |
483 | |
484 | /* If it's a new process, add it to the thread database */ | |
485 | ||
486 | if (pid != inferior_pid | |
487 | && !in_thread_list (pid)) | |
488 | { | |
489 | fprintf_unfiltered (gdb_stderr, "[New %s]\n", target_pid_to_str (pid)); | |
490 | add_thread (pid); | |
479f0f18 SG |
491 | |
492 | /* We may want to consider not doing a resume here in order to give | |
493 | the user a chance to play with the new thread. It might be good | |
494 | to make that a user-settable option. */ | |
495 | ||
496 | /* At this point, all threads are stopped (happens automatically in | |
497 | either the OS or the native code). Therefore we need to continue | |
498 | all threads in order to make progress. */ | |
499 | ||
500 | target_resume (-1, 0, TARGET_SIGNAL_0); | |
501 | continue; | |
320f93f7 | 502 | } |
bd5635a1 | 503 | |
c66ed884 SG |
504 | stop_signal = w.value.sig; |
505 | ||
506 | stop_pc = read_pc_pid (pid); | |
507 | ||
508 | if (STOPPED_BY_WATCHPOINT (w)) | |
509 | { | |
510 | write_pc (stop_pc - DECR_PC_AFTER_BREAK); | |
511 | ||
512 | remove_breakpoints (); | |
513 | target_resume (pid, 1, TARGET_SIGNAL_0); /* Single step */ | |
514 | ||
515 | if (target_wait_hook) | |
516 | target_wait_hook (pid, &w); | |
517 | else | |
518 | target_wait (pid, &w); | |
519 | insert_breakpoints (); | |
520 | } | |
521 | ||
fcbc95a7 JK |
522 | switch (w.kind) |
523 | { | |
524 | case TARGET_WAITKIND_LOADED: | |
525 | /* Ignore it gracefully. */ | |
526 | if (breakpoints_inserted) | |
527 | { | |
528 | mark_breakpoints_out (); | |
529 | insert_breakpoints (); | |
530 | } | |
531 | resume (0, TARGET_SIGNAL_0); | |
532 | continue; | |
1eeba686 | 533 | |
fcbc95a7 JK |
534 | case TARGET_WAITKIND_SPURIOUS: |
535 | resume (0, TARGET_SIGNAL_0); | |
536 | continue; | |
1eeba686 | 537 | |
fcbc95a7 | 538 | case TARGET_WAITKIND_EXITED: |
bd5635a1 | 539 | target_terminal_ours (); /* Must do this before mourn anyway */ |
1c95d7ab | 540 | annotate_exited (w.value.integer); |
67ac9759 | 541 | if (w.value.integer) |
e37a6e9c | 542 | printf_filtered ("\nProgram exited with code 0%o.\n", |
67ac9759 | 543 | (unsigned int)w.value.integer); |
bd5635a1 | 544 | else |
479f0f18 | 545 | printf_filtered ("\nProgram exited normally.\n"); |
199b2450 | 546 | gdb_flush (gdb_stdout); |
bd5635a1 RP |
547 | target_mourn_inferior (); |
548 | #ifdef NO_SINGLE_STEP | |
549 | one_stepped = 0; | |
550 | #endif | |
551 | stop_print_frame = 0; | |
fcbc95a7 | 552 | goto stop_stepping; |
67ac9759 | 553 | |
fcbc95a7 | 554 | case TARGET_WAITKIND_SIGNALLED: |
bd5635a1 | 555 | stop_print_frame = 0; |
67ac9759 | 556 | stop_signal = w.value.sig; |
bd5635a1 | 557 | target_terminal_ours (); /* Must do this before mourn anyway */ |
1c95d7ab | 558 | annotate_signalled (); |
4cc1b3f7 JK |
559 | |
560 | /* This looks pretty bogus to me. Doesn't TARGET_WAITKIND_SIGNALLED | |
561 | mean it is already dead? This has been here since GDB 2.8, so | |
562 | perhaps it means rms didn't understand unix waitstatuses? | |
563 | For the moment I'm just kludging around this in remote.c | |
564 | rather than trying to change it here --kingdon, 5 Dec 1994. */ | |
30875e1c | 565 | target_kill (); /* kill mourns as well */ |
4cc1b3f7 | 566 | |
1c95d7ab JK |
567 | printf_filtered ("\nProgram terminated with signal "); |
568 | annotate_signal_name (); | |
569 | printf_filtered ("%s", target_signal_to_name (stop_signal)); | |
570 | annotate_signal_name_end (); | |
571 | printf_filtered (", "); | |
572 | annotate_signal_string (); | |
573 | printf_filtered ("%s", target_signal_to_string (stop_signal)); | |
574 | annotate_signal_string_end (); | |
575 | printf_filtered (".\n"); | |
67ac9759 | 576 | |
fee44494 | 577 | printf_filtered ("The program no longer exists.\n"); |
199b2450 | 578 | gdb_flush (gdb_stdout); |
bd5635a1 RP |
579 | #ifdef NO_SINGLE_STEP |
580 | one_stepped = 0; | |
581 | #endif | |
fcbc95a7 JK |
582 | goto stop_stepping; |
583 | ||
584 | case TARGET_WAITKIND_STOPPED: | |
585 | /* This is the only case in which we keep going; the above cases | |
586 | end in a continue or goto. */ | |
bd5635a1 RP |
587 | break; |
588 | } | |
de43d7d0 | 589 | |
320f93f7 SG |
590 | /* See if a thread hit a thread-specific breakpoint that was meant for |
591 | another thread. If so, then step that thread past the breakpoint, | |
592 | and continue it. */ | |
de43d7d0 | 593 | |
67ac9759 | 594 | if (stop_signal == TARGET_SIGNAL_TRAP |
320f93f7 | 595 | && breakpoints_inserted |
de43d7d0 | 596 | && breakpoint_here_p (stop_pc - DECR_PC_AFTER_BREAK)) |
b2f03c30 | 597 | { |
320f93f7 | 598 | random_signal = 0; |
b2f03c30 JK |
599 | if (!breakpoint_thread_match (stop_pc - DECR_PC_AFTER_BREAK, pid)) |
600 | { | |
601 | /* Saw a breakpoint, but it was hit by the wrong thread. Just continue. */ | |
320f93f7 SG |
602 | write_pc (stop_pc - DECR_PC_AFTER_BREAK); |
603 | ||
604 | remove_breakpoints (); | |
605 | target_resume (pid, 1, TARGET_SIGNAL_0); /* Single step */ | |
606 | /* FIXME: What if a signal arrives instead of the single-step | |
607 | happening? */ | |
479f0f18 SG |
608 | |
609 | if (target_wait_hook) | |
610 | target_wait_hook (pid, &w); | |
611 | else | |
612 | target_wait (pid, &w); | |
320f93f7 SG |
613 | insert_breakpoints (); |
614 | target_resume (pid, 0, TARGET_SIGNAL_0); | |
b2f03c30 JK |
615 | continue; |
616 | } | |
b2f03c30 | 617 | } |
320f93f7 SG |
618 | else |
619 | random_signal = 1; | |
620 | ||
621 | /* See if something interesting happened to the non-current thread. If | |
622 | so, then switch to that thread, and eventually give control back to | |
623 | the user. */ | |
de43d7d0 | 624 | |
37c99ddb JK |
625 | if (pid != inferior_pid) |
626 | { | |
627 | int printed = 0; | |
628 | ||
320f93f7 SG |
629 | /* If it's a random signal for a non-current thread, notify user |
630 | if he's expressed an interest. */ | |
631 | ||
632 | if (random_signal | |
633 | && signal_print[stop_signal]) | |
634 | { | |
635 | printed = 1; | |
636 | target_terminal_ours_for_output (); | |
637 | printf_filtered ("\nProgram received signal %s, %s.\n", | |
638 | target_signal_to_name (stop_signal), | |
639 | target_signal_to_string (stop_signal)); | |
640 | gdb_flush (gdb_stdout); | |
641 | } | |
642 | ||
643 | /* If it's not SIGTRAP and not a signal we want to stop for, then | |
644 | continue the thread. */ | |
645 | ||
646 | if (stop_signal != TARGET_SIGNAL_TRAP | |
647 | && !signal_stop[stop_signal]) | |
37c99ddb | 648 | { |
320f93f7 SG |
649 | if (printed) |
650 | target_terminal_inferior (); | |
37c99ddb | 651 | |
320f93f7 SG |
652 | /* Clear the signal if it should not be passed. */ |
653 | if (signal_program[stop_signal] == 0) | |
654 | stop_signal = TARGET_SIGNAL_0; | |
655 | ||
656 | target_resume (pid, 0, stop_signal); | |
37c99ddb JK |
657 | continue; |
658 | } | |
320f93f7 SG |
659 | |
660 | /* It's a SIGTRAP or a signal we're interested in. Switch threads, | |
661 | and fall into the rest of wait_for_inferior(). */ | |
662 | ||
663 | inferior_pid = pid; | |
664 | printf_filtered ("[Switching to %s]\n", target_pid_to_str (pid)); | |
665 | ||
666 | flush_cached_frames (); | |
667 | trap_expected = 0; | |
668 | if (step_resume_breakpoint) | |
37c99ddb | 669 | { |
320f93f7 SG |
670 | delete_breakpoint (step_resume_breakpoint); |
671 | step_resume_breakpoint = NULL; | |
37c99ddb | 672 | } |
320f93f7 SG |
673 | |
674 | /* Not sure whether we need to blow this away too, | |
675 | but probably it is like the step-resume | |
676 | breakpoint. */ | |
677 | if (through_sigtramp_breakpoint) | |
678 | { | |
679 | delete_breakpoint (through_sigtramp_breakpoint); | |
680 | through_sigtramp_breakpoint = NULL; | |
681 | } | |
682 | prev_pc = 0; | |
320f93f7 SG |
683 | prev_func_name = NULL; |
684 | step_range_start = 0; | |
685 | step_range_end = 0; | |
686 | step_frame_address = 0; | |
687 | handling_longjmp = 0; | |
688 | another_trap = 0; | |
37c99ddb JK |
689 | } |
690 | ||
bd5635a1 RP |
691 | #ifdef NO_SINGLE_STEP |
692 | if (one_stepped) | |
693 | single_step (0); /* This actually cleans up the ss */ | |
694 | #endif /* NO_SINGLE_STEP */ | |
695 | ||
999dd04b JL |
696 | /* If PC is pointing at a nullified instruction, then step beyond |
697 | it so that the user won't be confused when GDB appears to be ready | |
698 | to execute it. */ | |
9f739abd SG |
699 | |
700 | if (INSTRUCTION_NULLIFIED) | |
701 | { | |
702 | resume (1, 0); | |
703 | continue; | |
704 | } | |
705 | ||
bd5635a1 RP |
706 | stop_func_start = 0; |
707 | stop_func_name = 0; | |
708 | /* Don't care about return value; stop_func_start and stop_func_name | |
709 | will both be 0 if it doesn't work. */ | |
37c99ddb | 710 | find_pc_partial_function (stop_pc, &stop_func_name, &stop_func_start, |
67ac9759 | 711 | &stop_func_end); |
bd5635a1 RP |
712 | stop_func_start += FUNCTION_START_OFFSET; |
713 | another_trap = 0; | |
714 | bpstat_clear (&stop_bpstat); | |
715 | stop_step = 0; | |
716 | stop_stack_dummy = 0; | |
717 | stop_print_frame = 1; | |
bd5635a1 RP |
718 | random_signal = 0; |
719 | stopped_by_random_signal = 0; | |
720 | breakpoints_failed = 0; | |
721 | ||
722 | /* Look at the cause of the stop, and decide what to do. | |
723 | The alternatives are: | |
724 | 1) break; to really stop and return to the debugger, | |
725 | 2) drop through to start up again | |
726 | (set another_trap to 1 to single step once) | |
727 | 3) set random_signal to 1, and the decision between 1 and 2 | |
728 | will be made according to the signal handling tables. */ | |
729 | ||
bd5635a1 RP |
730 | /* First, distinguish signals caused by the debugger from signals |
731 | that have to do with the program's own actions. | |
732 | Note that breakpoint insns may cause SIGTRAP or SIGILL | |
733 | or SIGEMT, depending on the operating system version. | |
734 | Here we detect when a SIGILL or SIGEMT is really a breakpoint | |
735 | and change it to SIGTRAP. */ | |
736 | ||
67ac9759 | 737 | if (stop_signal == TARGET_SIGNAL_TRAP |
bd5635a1 | 738 | || (breakpoints_inserted && |
67ac9759 JK |
739 | (stop_signal == TARGET_SIGNAL_ILL |
740 | || stop_signal == TARGET_SIGNAL_EMT | |
e37a6e9c | 741 | )) |
bd5635a1 RP |
742 | || stop_soon_quietly) |
743 | { | |
67ac9759 | 744 | if (stop_signal == TARGET_SIGNAL_TRAP && stop_after_trap) |
bd5635a1 RP |
745 | { |
746 | stop_print_frame = 0; | |
747 | break; | |
748 | } | |
749 | if (stop_soon_quietly) | |
750 | break; | |
751 | ||
752 | /* Don't even think about breakpoints | |
753 | if just proceeded over a breakpoint. | |
754 | ||
755 | However, if we are trying to proceed over a breakpoint | |
bcc37718 | 756 | and end up in sigtramp, then through_sigtramp_breakpoint |
bd5635a1 RP |
757 | will be set and we should check whether we've hit the |
758 | step breakpoint. */ | |
67ac9759 | 759 | if (stop_signal == TARGET_SIGNAL_TRAP && trap_expected |
bcc37718 | 760 | && through_sigtramp_breakpoint == NULL) |
bd5635a1 RP |
761 | bpstat_clear (&stop_bpstat); |
762 | else | |
763 | { | |
764 | /* See if there is a breakpoint at the current PC. */ | |
cb6b0202 | 765 | stop_bpstat = bpstat_stop_status |
479f0f18 | 766 | (&stop_pc, |
bd5635a1 | 767 | #if DECR_PC_AFTER_BREAK |
cb6b0202 JK |
768 | /* Notice the case of stepping through a jump |
769 | that lands just after a breakpoint. | |
770 | Don't confuse that with hitting the breakpoint. | |
771 | What we check for is that 1) stepping is going on | |
772 | and 2) the pc before the last insn does not match | |
773 | the address of the breakpoint before the current pc. */ | |
774 | (prev_pc != stop_pc - DECR_PC_AFTER_BREAK | |
775 | && CURRENTLY_STEPPING ()) | |
776 | #else /* DECR_PC_AFTER_BREAK zero */ | |
777 | 0 | |
778 | #endif /* DECR_PC_AFTER_BREAK zero */ | |
779 | ); | |
780 | /* Following in case break condition called a | |
781 | function. */ | |
782 | stop_print_frame = 1; | |
bd5635a1 | 783 | } |
fe675038 | 784 | |
67ac9759 | 785 | if (stop_signal == TARGET_SIGNAL_TRAP) |
bd5635a1 RP |
786 | random_signal |
787 | = !(bpstat_explains_signal (stop_bpstat) | |
788 | || trap_expected | |
84d59861 | 789 | #ifndef CALL_DUMMY_BREAKPOINT_OFFSET |
479f0f18 SG |
790 | || PC_IN_CALL_DUMMY (stop_pc, read_sp (), |
791 | FRAME_FP (get_current_frame ())) | |
84d59861 | 792 | #endif /* No CALL_DUMMY_BREAKPOINT_OFFSET. */ |
fe675038 | 793 | || (step_range_end && step_resume_breakpoint == NULL)); |
bd5635a1 RP |
794 | else |
795 | { | |
796 | random_signal | |
797 | = !(bpstat_explains_signal (stop_bpstat) | |
bd5635a1 RP |
798 | /* End of a stack dummy. Some systems (e.g. Sony |
799 | news) give another signal besides SIGTRAP, | |
800 | so check here as well as above. */ | |
84d59861 | 801 | #ifndef CALL_DUMMY_BREAKPOINT_OFFSET |
479f0f18 SG |
802 | || PC_IN_CALL_DUMMY (stop_pc, read_sp (), |
803 | FRAME_FP (get_current_frame ())) | |
84d59861 | 804 | #endif /* No CALL_DUMMY_BREAKPOINT_OFFSET. */ |
bd5635a1 RP |
805 | ); |
806 | if (!random_signal) | |
67ac9759 | 807 | stop_signal = TARGET_SIGNAL_TRAP; |
bd5635a1 RP |
808 | } |
809 | } | |
810 | else | |
811 | random_signal = 1; | |
fe675038 | 812 | |
bd5635a1 RP |
813 | /* For the program's own signals, act according to |
814 | the signal handling tables. */ | |
fe675038 | 815 | |
bd5635a1 RP |
816 | if (random_signal) |
817 | { | |
818 | /* Signal not for debugging purposes. */ | |
819 | int printed = 0; | |
820 | ||
821 | stopped_by_random_signal = 1; | |
822 | ||
67ac9759 | 823 | if (signal_print[stop_signal]) |
bd5635a1 RP |
824 | { |
825 | printed = 1; | |
826 | target_terminal_ours_for_output (); | |
1c95d7ab JK |
827 | annotate_signal (); |
828 | printf_filtered ("\nProgram received signal "); | |
829 | annotate_signal_name (); | |
830 | printf_filtered ("%s", target_signal_to_name (stop_signal)); | |
831 | annotate_signal_name_end (); | |
832 | printf_filtered (", "); | |
833 | annotate_signal_string (); | |
834 | printf_filtered ("%s", target_signal_to_string (stop_signal)); | |
835 | annotate_signal_string_end (); | |
836 | printf_filtered (".\n"); | |
199b2450 | 837 | gdb_flush (gdb_stdout); |
bd5635a1 | 838 | } |
67ac9759 | 839 | if (signal_stop[stop_signal]) |
bd5635a1 RP |
840 | break; |
841 | /* If not going to stop, give terminal back | |
842 | if we took it away. */ | |
843 | else if (printed) | |
844 | target_terminal_inferior (); | |
b7f81b57 | 845 | |
101b7f9c PS |
846 | /* Clear the signal if it should not be passed. */ |
847 | if (signal_program[stop_signal] == 0) | |
67ac9759 | 848 | stop_signal = TARGET_SIGNAL_0; |
101b7f9c | 849 | |
fe675038 JK |
850 | /* I'm not sure whether this needs to be check_sigtramp2 or |
851 | whether it could/should be keep_going. */ | |
852 | goto check_sigtramp2; | |
bd5635a1 | 853 | } |
30875e1c | 854 | |
bd5635a1 | 855 | /* Handle cases caused by hitting a breakpoint. */ |
fe675038 JK |
856 | { |
857 | CORE_ADDR jmp_buf_pc; | |
29c6dce2 JK |
858 | struct bpstat_what what; |
859 | ||
860 | what = bpstat_what (stop_bpstat); | |
bd5635a1 | 861 | |
84d59861 JK |
862 | if (what.call_dummy) |
863 | { | |
864 | stop_stack_dummy = 1; | |
865 | #ifdef HP_OS_BUG | |
866 | trap_expected_after_continue = 1; | |
867 | #endif | |
868 | } | |
869 | ||
fe675038 JK |
870 | switch (what.main_action) |
871 | { | |
872 | case BPSTAT_WHAT_SET_LONGJMP_RESUME: | |
873 | /* If we hit the breakpoint at longjmp, disable it for the | |
874 | duration of this command. Then, install a temporary | |
875 | breakpoint at the target of the jmp_buf. */ | |
876 | disable_longjmp_breakpoint(); | |
877 | remove_breakpoints (); | |
878 | breakpoints_inserted = 0; | |
879 | if (!GET_LONGJMP_TARGET(&jmp_buf_pc)) goto keep_going; | |
880 | ||
881 | /* Need to blow away step-resume breakpoint, as it | |
882 | interferes with us */ | |
883 | if (step_resume_breakpoint != NULL) | |
884 | { | |
885 | delete_breakpoint (step_resume_breakpoint); | |
886 | step_resume_breakpoint = NULL; | |
bcc37718 JK |
887 | } |
888 | /* Not sure whether we need to blow this away too, but probably | |
889 | it is like the step-resume breakpoint. */ | |
890 | if (through_sigtramp_breakpoint != NULL) | |
891 | { | |
892 | delete_breakpoint (through_sigtramp_breakpoint); | |
893 | through_sigtramp_breakpoint = NULL; | |
fe675038 | 894 | } |
30875e1c | 895 | |
101b7f9c | 896 | #if 0 |
fe675038 JK |
897 | /* FIXME - Need to implement nested temporary breakpoints */ |
898 | if (step_over_calls > 0) | |
899 | set_longjmp_resume_breakpoint(jmp_buf_pc, | |
900 | get_current_frame()); | |
901 | else | |
30875e1c | 902 | #endif /* 0 */ |
fe675038 JK |
903 | set_longjmp_resume_breakpoint(jmp_buf_pc, NULL); |
904 | handling_longjmp = 1; /* FIXME */ | |
905 | goto keep_going; | |
906 | ||
907 | case BPSTAT_WHAT_CLEAR_LONGJMP_RESUME: | |
908 | case BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE: | |
909 | remove_breakpoints (); | |
910 | breakpoints_inserted = 0; | |
101b7f9c | 911 | #if 0 |
fe675038 JK |
912 | /* FIXME - Need to implement nested temporary breakpoints */ |
913 | if (step_over_calls | |
479f0f18 | 914 | && (FRAME_FP (get_current_frame ()) |
fe675038 JK |
915 | INNER_THAN step_frame_address)) |
916 | { | |
917 | another_trap = 1; | |
918 | goto keep_going; | |
919 | } | |
30875e1c | 920 | #endif /* 0 */ |
fe675038 JK |
921 | disable_longjmp_breakpoint(); |
922 | handling_longjmp = 0; /* FIXME */ | |
923 | if (what.main_action == BPSTAT_WHAT_CLEAR_LONGJMP_RESUME) | |
101b7f9c | 924 | break; |
fe675038 JK |
925 | /* else fallthrough */ |
926 | ||
927 | case BPSTAT_WHAT_SINGLE: | |
928 | if (breakpoints_inserted) | |
929 | remove_breakpoints (); | |
930 | breakpoints_inserted = 0; | |
931 | another_trap = 1; | |
932 | /* Still need to check other stuff, at least the case | |
933 | where we are stepping and step out of the right range. */ | |
934 | break; | |
935 | ||
936 | case BPSTAT_WHAT_STOP_NOISY: | |
937 | stop_print_frame = 1; | |
bcc37718 JK |
938 | |
939 | /* We are about to nuke the step_resume_breakpoint and | |
940 | through_sigtramp_breakpoint via the cleanup chain, so | |
941 | no need to worry about it here. */ | |
942 | ||
fe675038 | 943 | goto stop_stepping; |
101b7f9c | 944 | |
fe675038 JK |
945 | case BPSTAT_WHAT_STOP_SILENT: |
946 | stop_print_frame = 0; | |
fe675038 | 947 | |
bcc37718 JK |
948 | /* We are about to nuke the step_resume_breakpoint and |
949 | through_sigtramp_breakpoint via the cleanup chain, so | |
950 | no need to worry about it here. */ | |
100f92e2 | 951 | |
bcc37718 | 952 | goto stop_stepping; |
fe675038 | 953 | |
bcc37718 | 954 | case BPSTAT_WHAT_STEP_RESUME: |
fe675038 JK |
955 | delete_breakpoint (step_resume_breakpoint); |
956 | step_resume_breakpoint = NULL; | |
bcc37718 JK |
957 | break; |
958 | ||
959 | case BPSTAT_WHAT_THROUGH_SIGTRAMP: | |
479f0f18 SG |
960 | if (through_sigtramp_breakpoint) |
961 | delete_breakpoint (through_sigtramp_breakpoint); | |
bcc37718 | 962 | through_sigtramp_breakpoint = NULL; |
30875e1c | 963 | |
fe675038 JK |
964 | /* If were waiting for a trap, hitting the step_resume_break |
965 | doesn't count as getting it. */ | |
966 | if (trap_expected) | |
967 | another_trap = 1; | |
bcc37718 JK |
968 | break; |
969 | ||
970 | case BPSTAT_WHAT_LAST: | |
971 | /* Not a real code, but listed here to shut up gcc -Wall. */ | |
972 | ||
973 | case BPSTAT_WHAT_KEEP_CHECKING: | |
974 | break; | |
30875e1c | 975 | } |
fe675038 | 976 | } |
30875e1c SG |
977 | |
978 | /* We come here if we hit a breakpoint but should not | |
979 | stop for it. Possibly we also were stepping | |
980 | and should stop for that. So fall through and | |
981 | test for stepping. But, if not stepping, | |
982 | do not stop. */ | |
983 | ||
84d59861 JK |
984 | #ifndef CALL_DUMMY_BREAKPOINT_OFFSET |
985 | /* This is the old way of detecting the end of the stack dummy. | |
986 | An architecture which defines CALL_DUMMY_BREAKPOINT_OFFSET gets | |
987 | handled above. As soon as we can test it on all of them, all | |
988 | architectures should define it. */ | |
989 | ||
bd5635a1 | 990 | /* If this is the breakpoint at the end of a stack dummy, |
c9de302b SG |
991 | just stop silently, unless the user was doing an si/ni, in which |
992 | case she'd better know what she's doing. */ | |
993 | ||
479f0f18 | 994 | if (PC_IN_CALL_DUMMY (stop_pc, read_sp (), FRAME_FP (get_current_frame ())) |
c9de302b SG |
995 | && !step_range_end) |
996 | { | |
997 | stop_print_frame = 0; | |
998 | stop_stack_dummy = 1; | |
bd5635a1 | 999 | #ifdef HP_OS_BUG |
c9de302b | 1000 | trap_expected_after_continue = 1; |
bd5635a1 | 1001 | #endif |
c9de302b SG |
1002 | break; |
1003 | } | |
84d59861 JK |
1004 | #endif /* No CALL_DUMMY_BREAKPOINT_OFFSET. */ |
1005 | ||
fe675038 | 1006 | if (step_resume_breakpoint) |
bd5635a1 RP |
1007 | /* Having a step-resume breakpoint overrides anything |
1008 | else having to do with stepping commands until | |
1009 | that breakpoint is reached. */ | |
bcc37718 JK |
1010 | /* I'm not sure whether this needs to be check_sigtramp2 or |
1011 | whether it could/should be keep_going. */ | |
fe675038 JK |
1012 | goto check_sigtramp2; |
1013 | ||
1014 | if (step_range_end == 0) | |
1015 | /* Likewise if we aren't even stepping. */ | |
1016 | /* I'm not sure whether this needs to be check_sigtramp2 or | |
1017 | whether it could/should be keep_going. */ | |
1018 | goto check_sigtramp2; | |
1019 | ||
bd5635a1 | 1020 | /* If stepping through a line, keep going if still within it. */ |
fe675038 JK |
1021 | if (stop_pc >= step_range_start |
1022 | && stop_pc < step_range_end | |
1023 | /* The step range might include the start of the | |
1024 | function, so if we are at the start of the | |
1025 | step range and either the stack or frame pointers | |
1026 | just changed, we've stepped outside */ | |
1027 | && !(stop_pc == step_range_start | |
479f0f18 SG |
1028 | && FRAME_FP (get_current_frame ()) |
1029 | && (read_sp () INNER_THAN step_sp | |
1030 | || FRAME_FP (get_current_frame ()) != step_frame_address))) | |
bd5635a1 | 1031 | { |
fe675038 JK |
1032 | /* We might be doing a BPSTAT_WHAT_SINGLE and getting a signal. |
1033 | So definately need to check for sigtramp here. */ | |
1034 | goto check_sigtramp2; | |
bd5635a1 | 1035 | } |
fe675038 | 1036 | |
479f0f18 SG |
1037 | /* We stepped out of the stepping range. */ |
1038 | ||
1039 | /* We can't update step_sp every time through the loop, because | |
1040 | reading the stack pointer would slow down stepping too much. | |
1041 | But we can update it every time we leave the step range. */ | |
1042 | update_step_sp = 1; | |
fe675038 JK |
1043 | |
1044 | /* Did we just take a signal? */ | |
1045 | if (IN_SIGTRAMP (stop_pc, stop_func_name) | |
1046 | && !IN_SIGTRAMP (prev_pc, prev_func_name)) | |
bd5635a1 | 1047 | { |
bcc37718 JK |
1048 | /* We've just taken a signal; go until we are back to |
1049 | the point where we took it and one more. */ | |
1050 | ||
fe675038 JK |
1051 | /* This code is needed at least in the following case: |
1052 | The user types "next" and then a signal arrives (before | |
1053 | the "next" is done). */ | |
bcc37718 JK |
1054 | |
1055 | /* Note that if we are stopped at a breakpoint, then we need | |
1056 | the step_resume breakpoint to override any breakpoints at | |
1057 | the same location, so that we will still step over the | |
1058 | breakpoint even though the signal happened. */ | |
1059 | ||
fe675038 JK |
1060 | { |
1061 | struct symtab_and_line sr_sal; | |
1062 | ||
1063 | sr_sal.pc = prev_pc; | |
1064 | sr_sal.symtab = NULL; | |
1065 | sr_sal.line = 0; | |
d1c0c6cf | 1066 | /* We could probably be setting the frame to |
479f0f18 | 1067 | step_frame_address; I don't think anyone thought to try it. */ |
fe675038 | 1068 | step_resume_breakpoint = |
bcc37718 | 1069 | set_momentary_breakpoint (sr_sal, NULL, bp_step_resume); |
fe675038 JK |
1070 | if (breakpoints_inserted) |
1071 | insert_breakpoints (); | |
1072 | } | |
bd5635a1 | 1073 | |
fe675038 JK |
1074 | /* If this is stepi or nexti, make sure that the stepping range |
1075 | gets us past that instruction. */ | |
1076 | if (step_range_end == 1) | |
1077 | /* FIXME: Does this run afoul of the code below which, if | |
1078 | we step into the middle of a line, resets the stepping | |
1079 | range? */ | |
1080 | step_range_end = (step_range_start = prev_pc) + 1; | |
101b7f9c | 1081 | |
fe675038 JK |
1082 | remove_breakpoints_on_following_step = 1; |
1083 | goto keep_going; | |
1084 | } | |
30875e1c | 1085 | |
320f93f7 | 1086 | #if 1 |
479f0f18 SG |
1087 | /* See if we left the step range due to a subroutine call that |
1088 | we should proceed to the end of. */ | |
1089 | ||
fe675038 JK |
1090 | if (stop_func_start) |
1091 | { | |
320f93f7 SG |
1092 | struct symtab *s; |
1093 | ||
fe675038 JK |
1094 | /* Do this after the IN_SIGTRAMP check; it might give |
1095 | an error. */ | |
1096 | prologue_pc = stop_func_start; | |
320f93f7 SG |
1097 | |
1098 | /* Don't skip the prologue if this is assembly source */ | |
1099 | s = find_pc_symtab (stop_pc); | |
1100 | if (s && s->language != language_asm) | |
1101 | SKIP_PROLOGUE (prologue_pc); | |
fe675038 | 1102 | } |
30875e1c | 1103 | |
c0c14c1e JK |
1104 | if ((/* Might be a non-recursive call. If the symbols are missing |
1105 | enough that stop_func_start == prev_func_start even though | |
1106 | they are really two functions, we will treat some calls as | |
1107 | jumps. */ | |
1108 | stop_func_start != prev_func_start | |
1109 | ||
1110 | /* Might be a recursive call if either we have a prologue | |
1111 | or the call instruction itself saves the PC on the stack. */ | |
1112 | || prologue_pc != stop_func_start | |
479f0f18 | 1113 | || read_sp () != step_sp) |
199b2450 TL |
1114 | && (/* PC is completely out of bounds of any known objfiles. Treat |
1115 | like a subroutine call. */ | |
1116 | ! stop_func_start | |
c0c14c1e | 1117 | |
f1619234 | 1118 | /* If we do a call, we will be at the start of a function... */ |
c0c14c1e | 1119 | || stop_pc == stop_func_start |
f1619234 JK |
1120 | |
1121 | /* ...except on the Alpha with -O (and also Irix 5 and | |
1122 | perhaps others), in which we might call the address | |
1123 | after the load of gp. Since prologues don't contain | |
1124 | calls, we can't return to within one, and we don't | |
1125 | jump back into them, so this check is OK. */ | |
c0c14c1e | 1126 | |
c0c14c1e | 1127 | || stop_pc < prologue_pc |
d747e0af | 1128 | |
479f0f18 SG |
1129 | /* ...and if it is a leaf function, the prologue might |
1130 | consist of gp loading only, so the call transfers to | |
1131 | the first instruction after the prologue. */ | |
1132 | || (stop_pc == prologue_pc | |
1133 | ||
1134 | /* Distinguish this from the case where we jump back | |
1135 | to the first instruction after the prologue, | |
1136 | within a function. */ | |
1137 | && stop_func_start != prev_func_start) | |
1138 | ||
c0c14c1e JK |
1139 | /* If we end up in certain places, it means we did a subroutine |
1140 | call. I'm not completely sure this is necessary now that we | |
1141 | have the above checks with stop_func_start (and now that | |
100f92e2 | 1142 | find_pc_partial_function is pickier). */ |
4cc1b3f7 | 1143 | || IN_SOLIB_CALL_TRAMPOLINE (stop_pc, stop_func_name) |
c0c14c1e JK |
1144 | |
1145 | /* If none of the above apply, it is a jump within a function, | |
1146 | or a return from a subroutine. The other case is longjmp, | |
1147 | which can no longer happen here as long as the | |
1148 | handling_longjmp stuff is working. */ | |
1149 | )) | |
320f93f7 SG |
1150 | #else |
1151 | /* This is experimental code which greatly simplifies the subroutine call | |
1152 | test. I've actually tested on the Alpha, and it works great. -Stu */ | |
1153 | ||
1154 | if (in_prologue (stop_pc, NULL) | |
1155 | || (prev_func_start != 0 | |
1156 | && stop_func_start == 0)) | |
1157 | #endif | |
fe675038 JK |
1158 | { |
1159 | /* It's a subroutine call. */ | |
fee44494 | 1160 | |
fe675038 JK |
1161 | if (step_over_calls == 0) |
1162 | { | |
1163 | /* I presume that step_over_calls is only 0 when we're | |
1164 | supposed to be stepping at the assembly language level | |
1165 | ("stepi"). Just stop. */ | |
1166 | stop_step = 1; | |
1167 | break; | |
1168 | } | |
fee44494 | 1169 | |
fe675038 JK |
1170 | if (step_over_calls > 0) |
1171 | /* We're doing a "next". */ | |
1172 | goto step_over_function; | |
1173 | ||
1174 | /* If we are in a function call trampoline (a stub between | |
1175 | the calling routine and the real function), locate the real | |
1176 | function. That's what tells us (a) whether we want to step | |
1177 | into it at all, and (b) what prologue we want to run to | |
1178 | the end of, if we do step into it. */ | |
1179 | tmp = SKIP_TRAMPOLINE_CODE (stop_pc); | |
1180 | if (tmp != 0) | |
1181 | stop_func_start = tmp; | |
1182 | ||
1183 | /* If we have line number information for the function we | |
1184 | are thinking of stepping into, step into it. | |
1185 | ||
1186 | If there are several symtabs at that PC (e.g. with include | |
1187 | files), just want to know whether *any* of them have line | |
1188 | numbers. find_pc_line handles this. */ | |
1189 | { | |
1190 | struct symtab_and_line tmp_sal; | |
1191 | ||
1192 | tmp_sal = find_pc_line (stop_func_start, 0); | |
1193 | if (tmp_sal.line != 0) | |
1194 | goto step_into_function; | |
1195 | } | |
d747e0af MT |
1196 | |
1197 | step_over_function: | |
fe675038 JK |
1198 | /* A subroutine call has happened. */ |
1199 | { | |
1200 | /* Set a special breakpoint after the return */ | |
1201 | struct symtab_and_line sr_sal; | |
1202 | sr_sal.pc = | |
1203 | ADDR_BITS_REMOVE | |
1204 | (SAVED_PC_AFTER_CALL (get_current_frame ())); | |
1205 | sr_sal.symtab = NULL; | |
1206 | sr_sal.line = 0; | |
1207 | step_resume_breakpoint = | |
1208 | set_momentary_breakpoint (sr_sal, get_current_frame (), | |
1209 | bp_step_resume); | |
479f0f18 | 1210 | step_resume_breakpoint->frame = step_frame_address; |
fe675038 JK |
1211 | if (breakpoints_inserted) |
1212 | insert_breakpoints (); | |
1213 | } | |
1214 | goto keep_going; | |
d747e0af MT |
1215 | |
1216 | step_into_function: | |
fe675038 JK |
1217 | /* Subroutine call with source code we should not step over. |
1218 | Do step to the first line of code in it. */ | |
320f93f7 SG |
1219 | { |
1220 | struct symtab *s; | |
1221 | ||
1222 | s = find_pc_symtab (stop_pc); | |
1223 | if (s && s->language != language_asm) | |
1224 | SKIP_PROLOGUE (stop_func_start); | |
1225 | } | |
fe675038 JK |
1226 | sal = find_pc_line (stop_func_start, 0); |
1227 | /* Use the step_resume_break to step until | |
1228 | the end of the prologue, even if that involves jumps | |
1229 | (as it seems to on the vax under 4.2). */ | |
1230 | /* If the prologue ends in the middle of a source line, | |
67ac9759 JK |
1231 | continue to the end of that source line (if it is still |
1232 | within the function). Otherwise, just go to end of prologue. */ | |
bd5635a1 | 1233 | #ifdef PROLOGUE_FIRSTLINE_OVERLAP |
fe675038 JK |
1234 | /* no, don't either. It skips any code that's |
1235 | legitimately on the first line. */ | |
bd5635a1 | 1236 | #else |
67ac9759 | 1237 | if (sal.end && sal.pc != stop_func_start && sal.end < stop_func_end) |
fe675038 | 1238 | stop_func_start = sal.end; |
bd5635a1 | 1239 | #endif |
d747e0af | 1240 | |
fe675038 JK |
1241 | if (stop_func_start == stop_pc) |
1242 | { | |
1243 | /* We are already there: stop now. */ | |
1244 | stop_step = 1; | |
1245 | break; | |
1246 | } | |
1247 | else | |
1248 | /* Put the step-breakpoint there and go until there. */ | |
1249 | { | |
1250 | struct symtab_and_line sr_sal; | |
1251 | ||
1252 | sr_sal.pc = stop_func_start; | |
1253 | sr_sal.symtab = NULL; | |
1254 | sr_sal.line = 0; | |
1255 | /* Do not specify what the fp should be when we stop | |
1256 | since on some machines the prologue | |
1257 | is where the new fp value is established. */ | |
1258 | step_resume_breakpoint = | |
84d59861 | 1259 | set_momentary_breakpoint (sr_sal, NULL, bp_step_resume); |
fe675038 JK |
1260 | if (breakpoints_inserted) |
1261 | insert_breakpoints (); | |
1262 | ||
1263 | /* And make sure stepping stops right away then. */ | |
1264 | step_range_end = step_range_start; | |
bd5635a1 | 1265 | } |
fe675038 JK |
1266 | goto keep_going; |
1267 | } | |
d747e0af | 1268 | |
b2f03c30 | 1269 | /* We've wandered out of the step range. */ |
d747e0af | 1270 | |
fe675038 JK |
1271 | sal = find_pc_line(stop_pc, 0); |
1272 | ||
1273 | if (step_range_end == 1) | |
1274 | { | |
1275 | /* It is stepi or nexti. We always want to stop stepping after | |
1276 | one instruction. */ | |
1277 | stop_step = 1; | |
1278 | break; | |
1279 | } | |
1280 | ||
4cc1b3f7 JK |
1281 | /* If we're in the return path from a shared library trampoline, |
1282 | we want to proceed through the trampoline when stepping. */ | |
1283 | if (IN_SOLIB_RETURN_TRAMPOLINE(stop_pc, stop_func_name)) | |
1284 | { | |
1285 | CORE_ADDR tmp; | |
1286 | ||
1287 | /* Determine where this trampoline returns. */ | |
1288 | tmp = SKIP_TRAMPOLINE_CODE (stop_pc); | |
1289 | ||
1290 | /* Only proceed through if we know where it's going. */ | |
1291 | if (tmp) | |
1292 | { | |
1293 | /* And put the step-breakpoint there and go until there. */ | |
1294 | struct symtab_and_line sr_sal; | |
1295 | ||
1296 | sr_sal.pc = tmp; | |
1297 | sr_sal.symtab = NULL; | |
1298 | sr_sal.line = 0; | |
1299 | /* Do not specify what the fp should be when we stop | |
1300 | since on some machines the prologue | |
1301 | is where the new fp value is established. */ | |
1302 | step_resume_breakpoint = | |
1303 | set_momentary_breakpoint (sr_sal, NULL, bp_step_resume); | |
1304 | if (breakpoints_inserted) | |
1305 | insert_breakpoints (); | |
1306 | ||
1307 | /* Restart without fiddling with the step ranges or | |
1308 | other state. */ | |
1309 | goto keep_going; | |
1310 | } | |
1311 | } | |
1312 | ||
fe675038 JK |
1313 | if (sal.line == 0) |
1314 | { | |
1315 | /* We have no line number information. That means to stop | |
1316 | stepping (does this always happen right after one instruction, | |
1317 | when we do "s" in a function with no line numbers, | |
1318 | or can this happen as a result of a return or longjmp?). */ | |
1319 | stop_step = 1; | |
1320 | break; | |
1321 | } | |
1322 | ||
b2f03c30 JK |
1323 | if (stop_pc == sal.pc |
1324 | && (current_line != sal.line || current_symtab != sal.symtab)) | |
fe675038 JK |
1325 | { |
1326 | /* We are at the start of a different line. So stop. Note that | |
1327 | we don't stop if we step into the middle of a different line. | |
1328 | That is said to make things like for (;;) statements work | |
1329 | better. */ | |
1330 | stop_step = 1; | |
1331 | break; | |
bd5635a1 RP |
1332 | } |
1333 | ||
fe675038 JK |
1334 | /* We aren't done stepping. |
1335 | ||
1336 | Optimize by setting the stepping range to the line. | |
1337 | (We might not be in the original line, but if we entered a | |
1338 | new line in mid-statement, we continue stepping. This makes | |
1339 | things like for(;;) statements work better.) */ | |
67ac9759 JK |
1340 | |
1341 | if (stop_func_end && sal.end >= stop_func_end) | |
1342 | { | |
1343 | /* If this is the last line of the function, don't keep stepping | |
1344 | (it would probably step us out of the function). | |
1345 | This is particularly necessary for a one-line function, | |
1346 | in which after skipping the prologue we better stop even though | |
1347 | we will be in mid-line. */ | |
1348 | stop_step = 1; | |
1349 | break; | |
1350 | } | |
fe675038 JK |
1351 | step_range_start = sal.pc; |
1352 | step_range_end = sal.end; | |
1353 | goto keep_going; | |
1354 | ||
1355 | check_sigtramp2: | |
d747e0af MT |
1356 | if (trap_expected |
1357 | && IN_SIGTRAMP (stop_pc, stop_func_name) | |
1358 | && !IN_SIGTRAMP (prev_pc, prev_func_name)) | |
bd5635a1 RP |
1359 | { |
1360 | /* What has happened here is that we have just stepped the inferior | |
1361 | with a signal (because it is a signal which shouldn't make | |
1362 | us stop), thus stepping into sigtramp. | |
1363 | ||
1364 | So we need to set a step_resume_break_address breakpoint | |
fe675038 JK |
1365 | and continue until we hit it, and then step. FIXME: This should |
1366 | be more enduring than a step_resume breakpoint; we should know | |
1367 | that we will later need to keep going rather than re-hitting | |
1368 | the breakpoint here (see testsuite/gdb.t06/signals.exp where | |
1369 | it says "exceedingly difficult"). */ | |
1370 | struct symtab_and_line sr_sal; | |
1371 | ||
1372 | sr_sal.pc = prev_pc; | |
1373 | sr_sal.symtab = NULL; | |
1374 | sr_sal.line = 0; | |
bcc37718 JK |
1375 | /* We perhaps could set the frame if we kept track of what |
1376 | the frame corresponding to prev_pc was. But we don't, | |
1377 | so don't. */ | |
1378 | through_sigtramp_breakpoint = | |
1379 | set_momentary_breakpoint (sr_sal, NULL, bp_through_sigtramp); | |
bd5635a1 | 1380 | if (breakpoints_inserted) |
fe675038 JK |
1381 | insert_breakpoints (); |
1382 | ||
bd5635a1 RP |
1383 | remove_breakpoints_on_following_step = 1; |
1384 | another_trap = 1; | |
1385 | } | |
1386 | ||
30875e1c | 1387 | keep_going: |
fe675038 JK |
1388 | /* Come to this label when you need to resume the inferior. |
1389 | It's really much cleaner to do a goto than a maze of if-else | |
1390 | conditions. */ | |
30875e1c | 1391 | |
bd5635a1 RP |
1392 | /* Save the pc before execution, to compare with pc after stop. */ |
1393 | prev_pc = read_pc (); /* Might have been DECR_AFTER_BREAK */ | |
1394 | prev_func_start = stop_func_start; /* Ok, since if DECR_PC_AFTER | |
1395 | BREAK is defined, the | |
1396 | original pc would not have | |
1397 | been at the start of a | |
1398 | function. */ | |
1399 | prev_func_name = stop_func_name; | |
479f0f18 SG |
1400 | |
1401 | if (update_step_sp) | |
1402 | step_sp = read_sp (); | |
1403 | update_step_sp = 0; | |
bd5635a1 RP |
1404 | |
1405 | /* If we did not do break;, it means we should keep | |
1406 | running the inferior and not return to debugger. */ | |
1407 | ||
67ac9759 | 1408 | if (trap_expected && stop_signal != TARGET_SIGNAL_TRAP) |
bd5635a1 RP |
1409 | { |
1410 | /* We took a signal (which we are supposed to pass through to | |
1411 | the inferior, else we'd have done a break above) and we | |
1412 | haven't yet gotten our trap. Simply continue. */ | |
cb6b0202 | 1413 | resume (CURRENTLY_STEPPING (), stop_signal); |
bd5635a1 RP |
1414 | } |
1415 | else | |
1416 | { | |
1417 | /* Either the trap was not expected, but we are continuing | |
1418 | anyway (the user asked that this signal be passed to the | |
1419 | child) | |
1420 | -- or -- | |
1421 | The signal was SIGTRAP, e.g. it was our signal, but we | |
1422 | decided we should resume from it. | |
1423 | ||
1424 | We're going to run this baby now! | |
1425 | ||
1426 | Insert breakpoints now, unless we are trying | |
1427 | to one-proceed past a breakpoint. */ | |
1428 | /* If we've just finished a special step resume and we don't | |
1429 | want to hit a breakpoint, pull em out. */ | |
d1c0c6cf JK |
1430 | if (step_resume_breakpoint == NULL |
1431 | && through_sigtramp_breakpoint == NULL | |
1432 | && remove_breakpoints_on_following_step) | |
bd5635a1 RP |
1433 | { |
1434 | remove_breakpoints_on_following_step = 0; | |
1435 | remove_breakpoints (); | |
1436 | breakpoints_inserted = 0; | |
1437 | } | |
1438 | else if (!breakpoints_inserted && | |
bcc37718 | 1439 | (through_sigtramp_breakpoint != NULL || !another_trap)) |
bd5635a1 | 1440 | { |
bd5635a1 RP |
1441 | breakpoints_failed = insert_breakpoints (); |
1442 | if (breakpoints_failed) | |
1443 | break; | |
1444 | breakpoints_inserted = 1; | |
1445 | } | |
1446 | ||
1447 | trap_expected = another_trap; | |
1448 | ||
67ac9759 JK |
1449 | if (stop_signal == TARGET_SIGNAL_TRAP) |
1450 | stop_signal = TARGET_SIGNAL_0; | |
bd5635a1 RP |
1451 | |
1452 | #ifdef SHIFT_INST_REGS | |
1453 | /* I'm not sure when this following segment applies. I do know, now, | |
1454 | that we shouldn't rewrite the regs when we were stopped by a | |
1455 | random signal from the inferior process. */ | |
cef4c2e7 PS |
1456 | /* FIXME: Shouldn't this be based on the valid bit of the SXIP? |
1457 | (this is only used on the 88k). */ | |
bd5635a1 | 1458 | |
d11c44f1 | 1459 | if (!bpstat_explains_signal (stop_bpstat) |
67ac9759 | 1460 | && (stop_signal != TARGET_SIGNAL_CHLD) |
bd5635a1 | 1461 | && !stopped_by_random_signal) |
07a5991a | 1462 | SHIFT_INST_REGS(); |
bd5635a1 RP |
1463 | #endif /* SHIFT_INST_REGS */ |
1464 | ||
cb6b0202 | 1465 | resume (CURRENTLY_STEPPING (), stop_signal); |
bd5635a1 RP |
1466 | } |
1467 | } | |
30875e1c SG |
1468 | |
1469 | stop_stepping: | |
bd5635a1 RP |
1470 | if (target_has_execution) |
1471 | { | |
1472 | /* Assuming the inferior still exists, set these up for next | |
1473 | time, just like we did above if we didn't break out of the | |
1474 | loop. */ | |
1475 | prev_pc = read_pc (); | |
1476 | prev_func_start = stop_func_start; | |
1477 | prev_func_name = stop_func_name; | |
bd5635a1 | 1478 | } |
fe675038 | 1479 | do_cleanups (old_cleanups); |
bd5635a1 RP |
1480 | } |
1481 | \f | |
1482 | /* Here to return control to GDB when the inferior stops for real. | |
1483 | Print appropriate messages, remove breakpoints, give terminal our modes. | |
1484 | ||
1485 | STOP_PRINT_FRAME nonzero means print the executing frame | |
1486 | (pc, function, args, file, line number and line text). | |
1487 | BREAKPOINTS_FAILED nonzero means stop was due to error | |
1488 | attempting to insert breakpoints. */ | |
1489 | ||
1490 | void | |
1491 | normal_stop () | |
1492 | { | |
1493 | /* Make sure that the current_frame's pc is correct. This | |
1494 | is a correction for setting up the frame info before doing | |
1495 | DECR_PC_AFTER_BREAK */ | |
3f0184ac | 1496 | if (target_has_execution && get_current_frame()) |
bd5635a1 RP |
1497 | (get_current_frame ())->pc = read_pc (); |
1498 | ||
1499 | if (breakpoints_failed) | |
1500 | { | |
1501 | target_terminal_ours_for_output (); | |
1502 | print_sys_errmsg ("ptrace", breakpoints_failed); | |
e37a6e9c | 1503 | printf_filtered ("Stopped; cannot insert breakpoints.\n\ |
bd5635a1 RP |
1504 | The same program may be running in another process.\n"); |
1505 | } | |
1506 | ||
bd5635a1 RP |
1507 | if (target_has_execution && breakpoints_inserted) |
1508 | if (remove_breakpoints ()) | |
1509 | { | |
1510 | target_terminal_ours_for_output (); | |
e37a6e9c | 1511 | printf_filtered ("Cannot remove breakpoints because program is no longer writable.\n\ |
bd5635a1 RP |
1512 | It might be running in another process.\n\ |
1513 | Further execution is probably impossible.\n"); | |
1514 | } | |
1515 | ||
1516 | breakpoints_inserted = 0; | |
1517 | ||
1518 | /* Delete the breakpoint we stopped at, if it wants to be deleted. | |
1519 | Delete any breakpoint that is to be deleted at the next stop. */ | |
1520 | ||
1521 | breakpoint_auto_delete (stop_bpstat); | |
1522 | ||
1523 | /* If an auto-display called a function and that got a signal, | |
1524 | delete that auto-display to avoid an infinite recursion. */ | |
1525 | ||
1526 | if (stopped_by_random_signal) | |
1527 | disable_current_display (); | |
1528 | ||
1529 | if (step_multi && stop_step) | |
1c95d7ab | 1530 | goto done; |
bd5635a1 RP |
1531 | |
1532 | target_terminal_ours (); | |
1533 | ||
3950a34e RP |
1534 | /* Look up the hook_stop and run it if it exists. */ |
1535 | ||
1536 | if (stop_command->hook) | |
1537 | { | |
1538 | catch_errors (hook_stop_stub, (char *)stop_command->hook, | |
fee44494 | 1539 | "Error while running hook_stop:\n", RETURN_MASK_ALL); |
3950a34e RP |
1540 | } |
1541 | ||
bd5635a1 | 1542 | if (!target_has_stack) |
1c95d7ab | 1543 | goto done; |
bd5635a1 RP |
1544 | |
1545 | /* Select innermost stack frame except on return from a stack dummy routine, | |
1515ff18 JG |
1546 | or if the program has exited. Print it without a level number if |
1547 | we have changed functions or hit a breakpoint. Print source line | |
1548 | if we have one. */ | |
bd5635a1 RP |
1549 | if (!stop_stack_dummy) |
1550 | { | |
479f0f18 SG |
1551 | select_frame (get_current_frame (), 0); |
1552 | ||
bd5635a1 RP |
1553 | if (stop_print_frame) |
1554 | { | |
1515ff18 JG |
1555 | int source_only; |
1556 | ||
1557 | source_only = bpstat_print (stop_bpstat); | |
1558 | source_only = source_only || | |
1559 | ( stop_step | |
479f0f18 | 1560 | && step_frame_address == FRAME_FP (get_current_frame ()) |
1515ff18 JG |
1561 | && step_start_function == find_pc_function (stop_pc)); |
1562 | ||
1563 | print_stack_frame (selected_frame, -1, source_only? -1: 1); | |
bd5635a1 RP |
1564 | |
1565 | /* Display the auto-display expressions. */ | |
1566 | do_displays (); | |
1567 | } | |
1568 | } | |
1569 | ||
1570 | /* Save the function value return registers, if we care. | |
1571 | We might be about to restore their previous contents. */ | |
1572 | if (proceed_to_finish) | |
1573 | read_register_bytes (0, stop_registers, REGISTER_BYTES); | |
1574 | ||
1575 | if (stop_stack_dummy) | |
1576 | { | |
1577 | /* Pop the empty frame that contains the stack dummy. | |
1578 | POP_FRAME ends with a setting of the current frame, so we | |
1579 | can use that next. */ | |
1580 | POP_FRAME; | |
f1de67d3 PS |
1581 | /* Set stop_pc to what it was before we called the function. Can't rely |
1582 | on restore_inferior_status because that only gets called if we don't | |
1583 | stop in the called function. */ | |
1584 | stop_pc = read_pc(); | |
bd5635a1 RP |
1585 | select_frame (get_current_frame (), 0); |
1586 | } | |
1c95d7ab JK |
1587 | done: |
1588 | annotate_stopped (); | |
bd5635a1 | 1589 | } |
3950a34e RP |
1590 | |
1591 | static int | |
1592 | hook_stop_stub (cmd) | |
1593 | char *cmd; | |
1594 | { | |
1595 | execute_user_command ((struct cmd_list_element *)cmd, 0); | |
a8a69e63 | 1596 | return (0); |
3950a34e | 1597 | } |
bd5635a1 | 1598 | \f |
cc221e76 FF |
1599 | int signal_stop_state (signo) |
1600 | int signo; | |
1601 | { | |
67ac9759 | 1602 | return signal_stop[signo]; |
cc221e76 FF |
1603 | } |
1604 | ||
1605 | int signal_print_state (signo) | |
1606 | int signo; | |
1607 | { | |
67ac9759 | 1608 | return signal_print[signo]; |
cc221e76 FF |
1609 | } |
1610 | ||
1611 | int signal_pass_state (signo) | |
1612 | int signo; | |
1613 | { | |
67ac9759 | 1614 | return signal_program[signo]; |
cc221e76 FF |
1615 | } |
1616 | ||
bd5635a1 RP |
1617 | static void |
1618 | sig_print_header () | |
1619 | { | |
67ac9759 JK |
1620 | printf_filtered ("\ |
1621 | Signal Stop\tPrint\tPass to program\tDescription\n"); | |
bd5635a1 RP |
1622 | } |
1623 | ||
1624 | static void | |
67ac9759 JK |
1625 | sig_print_info (oursig) |
1626 | enum target_signal oursig; | |
bd5635a1 | 1627 | { |
67ac9759 JK |
1628 | char *name = target_signal_to_name (oursig); |
1629 | printf_filtered ("%s", name); | |
1630 | printf_filtered ("%*.*s ", 13 - strlen (name), 13 - strlen (name), | |
1631 | " "); | |
1632 | printf_filtered ("%s\t", signal_stop[oursig] ? "Yes" : "No"); | |
1633 | printf_filtered ("%s\t", signal_print[oursig] ? "Yes" : "No"); | |
1634 | printf_filtered ("%s\t\t", signal_program[oursig] ? "Yes" : "No"); | |
1635 | printf_filtered ("%s\n", target_signal_to_string (oursig)); | |
bd5635a1 RP |
1636 | } |
1637 | ||
1638 | /* Specify how various signals in the inferior should be handled. */ | |
1639 | ||
1640 | static void | |
1641 | handle_command (args, from_tty) | |
1642 | char *args; | |
1643 | int from_tty; | |
1644 | { | |
072b552a JG |
1645 | char **argv; |
1646 | int digits, wordlen; | |
1647 | int sigfirst, signum, siglast; | |
67ac9759 | 1648 | enum target_signal oursig; |
072b552a JG |
1649 | int allsigs; |
1650 | int nsigs; | |
1651 | unsigned char *sigs; | |
1652 | struct cleanup *old_chain; | |
1653 | ||
1654 | if (args == NULL) | |
1655 | { | |
1656 | error_no_arg ("signal to handle"); | |
1657 | } | |
bd5635a1 | 1658 | |
072b552a JG |
1659 | /* Allocate and zero an array of flags for which signals to handle. */ |
1660 | ||
67ac9759 | 1661 | nsigs = (int)TARGET_SIGNAL_LAST; |
072b552a JG |
1662 | sigs = (unsigned char *) alloca (nsigs); |
1663 | memset (sigs, 0, nsigs); | |
bd5635a1 | 1664 | |
072b552a JG |
1665 | /* Break the command line up into args. */ |
1666 | ||
1667 | argv = buildargv (args); | |
1668 | if (argv == NULL) | |
bd5635a1 | 1669 | { |
072b552a JG |
1670 | nomem (0); |
1671 | } | |
1672 | old_chain = make_cleanup (freeargv, (char *) argv); | |
bd5635a1 | 1673 | |
67ac9759 | 1674 | /* Walk through the args, looking for signal oursigs, signal names, and |
072b552a JG |
1675 | actions. Signal numbers and signal names may be interspersed with |
1676 | actions, with the actions being performed for all signals cumulatively | |
1677 | specified. Signal ranges can be specified as <LOW>-<HIGH>. */ | |
bd5635a1 | 1678 | |
072b552a JG |
1679 | while (*argv != NULL) |
1680 | { | |
1681 | wordlen = strlen (*argv); | |
1682 | for (digits = 0; isdigit ((*argv)[digits]); digits++) {;} | |
1683 | allsigs = 0; | |
1684 | sigfirst = siglast = -1; | |
1685 | ||
1686 | if (wordlen >= 1 && !strncmp (*argv, "all", wordlen)) | |
1687 | { | |
1688 | /* Apply action to all signals except those used by the | |
1689 | debugger. Silently skip those. */ | |
1690 | allsigs = 1; | |
1691 | sigfirst = 0; | |
1692 | siglast = nsigs - 1; | |
1693 | } | |
1694 | else if (wordlen >= 1 && !strncmp (*argv, "stop", wordlen)) | |
1695 | { | |
1696 | SET_SIGS (nsigs, sigs, signal_stop); | |
1697 | SET_SIGS (nsigs, sigs, signal_print); | |
1698 | } | |
1699 | else if (wordlen >= 1 && !strncmp (*argv, "ignore", wordlen)) | |
1700 | { | |
1701 | UNSET_SIGS (nsigs, sigs, signal_program); | |
1702 | } | |
1703 | else if (wordlen >= 2 && !strncmp (*argv, "print", wordlen)) | |
1704 | { | |
1705 | SET_SIGS (nsigs, sigs, signal_print); | |
1706 | } | |
1707 | else if (wordlen >= 2 && !strncmp (*argv, "pass", wordlen)) | |
1708 | { | |
1709 | SET_SIGS (nsigs, sigs, signal_program); | |
1710 | } | |
1711 | else if (wordlen >= 3 && !strncmp (*argv, "nostop", wordlen)) | |
1712 | { | |
1713 | UNSET_SIGS (nsigs, sigs, signal_stop); | |
1714 | } | |
1715 | else if (wordlen >= 3 && !strncmp (*argv, "noignore", wordlen)) | |
1716 | { | |
1717 | SET_SIGS (nsigs, sigs, signal_program); | |
1718 | } | |
1719 | else if (wordlen >= 4 && !strncmp (*argv, "noprint", wordlen)) | |
1720 | { | |
1721 | UNSET_SIGS (nsigs, sigs, signal_print); | |
1722 | UNSET_SIGS (nsigs, sigs, signal_stop); | |
1723 | } | |
1724 | else if (wordlen >= 4 && !strncmp (*argv, "nopass", wordlen)) | |
1725 | { | |
1726 | UNSET_SIGS (nsigs, sigs, signal_program); | |
1727 | } | |
1728 | else if (digits > 0) | |
bd5635a1 | 1729 | { |
67ac9759 JK |
1730 | /* It is numeric. The numeric signal refers to our own internal |
1731 | signal numbering from target.h, not to host/target signal number. | |
1732 | This is a feature; users really should be using symbolic names | |
1733 | anyway, and the common ones like SIGHUP, SIGINT, SIGALRM, etc. | |
1734 | will work right anyway. */ | |
1735 | ||
c66ed884 | 1736 | sigfirst = siglast = (int) target_signal_from_command (atoi (*argv)); |
072b552a | 1737 | if ((*argv)[digits] == '-') |
bd5635a1 | 1738 | { |
c66ed884 SG |
1739 | siglast = |
1740 | (int) target_signal_from_command (atoi ((*argv) + digits + 1)); | |
bd5635a1 | 1741 | } |
072b552a | 1742 | if (sigfirst > siglast) |
bd5635a1 | 1743 | { |
072b552a JG |
1744 | /* Bet he didn't figure we'd think of this case... */ |
1745 | signum = sigfirst; | |
1746 | sigfirst = siglast; | |
1747 | siglast = signum; | |
bd5635a1 | 1748 | } |
bd5635a1 | 1749 | } |
072b552a | 1750 | else |
bd5635a1 | 1751 | { |
fcbc95a7 JK |
1752 | oursig = target_signal_from_name (*argv); |
1753 | if (oursig != TARGET_SIGNAL_UNKNOWN) | |
1754 | { | |
1755 | sigfirst = siglast = (int)oursig; | |
1756 | } | |
1757 | else | |
1758 | { | |
1759 | /* Not a number and not a recognized flag word => complain. */ | |
1760 | error ("Unrecognized or ambiguous flag word: \"%s\".", *argv); | |
1761 | } | |
bd5635a1 | 1762 | } |
072b552a JG |
1763 | |
1764 | /* If any signal numbers or symbol names were found, set flags for | |
1765 | which signals to apply actions to. */ | |
1766 | ||
1767 | for (signum = sigfirst; signum >= 0 && signum <= siglast; signum++) | |
bd5635a1 | 1768 | { |
67ac9759 | 1769 | switch ((enum target_signal)signum) |
072b552a | 1770 | { |
67ac9759 JK |
1771 | case TARGET_SIGNAL_TRAP: |
1772 | case TARGET_SIGNAL_INT: | |
072b552a JG |
1773 | if (!allsigs && !sigs[signum]) |
1774 | { | |
67ac9759 JK |
1775 | if (query ("%s is used by the debugger.\n\ |
1776 | Are you sure you want to change it? ", | |
1777 | target_signal_to_name | |
1778 | ((enum target_signal)signum))) | |
072b552a JG |
1779 | { |
1780 | sigs[signum] = 1; | |
1781 | } | |
1782 | else | |
1783 | { | |
199b2450 TL |
1784 | printf_unfiltered ("Not confirmed, unchanged.\n"); |
1785 | gdb_flush (gdb_stdout); | |
072b552a JG |
1786 | } |
1787 | } | |
1788 | break; | |
c66ed884 SG |
1789 | case TARGET_SIGNAL_0: |
1790 | case TARGET_SIGNAL_DEFAULT: | |
1791 | case TARGET_SIGNAL_UNKNOWN: | |
1792 | /* Make sure that "all" doesn't print these. */ | |
1793 | break; | |
072b552a JG |
1794 | default: |
1795 | sigs[signum] = 1; | |
1796 | break; | |
1797 | } | |
bd5635a1 RP |
1798 | } |
1799 | ||
072b552a | 1800 | argv++; |
bd5635a1 RP |
1801 | } |
1802 | ||
de43d7d0 | 1803 | target_notice_signals(inferior_pid); |
cc221e76 | 1804 | |
bd5635a1 RP |
1805 | if (from_tty) |
1806 | { | |
1807 | /* Show the results. */ | |
1808 | sig_print_header (); | |
072b552a JG |
1809 | for (signum = 0; signum < nsigs; signum++) |
1810 | { | |
1811 | if (sigs[signum]) | |
1812 | { | |
1813 | sig_print_info (signum); | |
1814 | } | |
1815 | } | |
bd5635a1 | 1816 | } |
072b552a JG |
1817 | |
1818 | do_cleanups (old_chain); | |
bd5635a1 RP |
1819 | } |
1820 | ||
67ac9759 JK |
1821 | /* Print current contents of the tables set by the handle command. |
1822 | It is possible we should just be printing signals actually used | |
1823 | by the current target (but for things to work right when switching | |
1824 | targets, all signals should be in the signal tables). */ | |
bd5635a1 RP |
1825 | |
1826 | static void | |
e37a6e9c | 1827 | signals_info (signum_exp, from_tty) |
bd5635a1 | 1828 | char *signum_exp; |
e37a6e9c | 1829 | int from_tty; |
bd5635a1 | 1830 | { |
67ac9759 | 1831 | enum target_signal oursig; |
bd5635a1 RP |
1832 | sig_print_header (); |
1833 | ||
1834 | if (signum_exp) | |
1835 | { | |
1836 | /* First see if this is a symbol name. */ | |
67ac9759 JK |
1837 | oursig = target_signal_from_name (signum_exp); |
1838 | if (oursig == TARGET_SIGNAL_UNKNOWN) | |
bd5635a1 | 1839 | { |
c66ed884 SG |
1840 | /* No, try numeric. */ |
1841 | oursig = | |
1842 | target_signal_from_command (parse_and_eval_address (signum_exp)); | |
bd5635a1 | 1843 | } |
67ac9759 | 1844 | sig_print_info (oursig); |
bd5635a1 RP |
1845 | return; |
1846 | } | |
1847 | ||
1848 | printf_filtered ("\n"); | |
db4340a6 | 1849 | /* These ugly casts brought to you by the native VAX compiler. */ |
2fe3b329 | 1850 | for (oursig = TARGET_SIGNAL_FIRST; |
db4340a6 JK |
1851 | (int)oursig < (int)TARGET_SIGNAL_LAST; |
1852 | oursig = (enum target_signal)((int)oursig + 1)) | |
bd5635a1 RP |
1853 | { |
1854 | QUIT; | |
1855 | ||
fcbc95a7 JK |
1856 | if (oursig != TARGET_SIGNAL_UNKNOWN |
1857 | && oursig != TARGET_SIGNAL_DEFAULT | |
1858 | && oursig != TARGET_SIGNAL_0) | |
67ac9759 | 1859 | sig_print_info (oursig); |
bd5635a1 RP |
1860 | } |
1861 | ||
1862 | printf_filtered ("\nUse the \"handle\" command to change these tables.\n"); | |
1863 | } | |
1864 | \f | |
1865 | /* Save all of the information associated with the inferior<==>gdb | |
1866 | connection. INF_STATUS is a pointer to a "struct inferior_status" | |
1867 | (defined in inferior.h). */ | |
1868 | ||
1869 | void | |
1870 | save_inferior_status (inf_status, restore_stack_info) | |
1871 | struct inferior_status *inf_status; | |
1872 | int restore_stack_info; | |
1873 | { | |
bd5635a1 RP |
1874 | inf_status->stop_signal = stop_signal; |
1875 | inf_status->stop_pc = stop_pc; | |
bd5635a1 RP |
1876 | inf_status->stop_step = stop_step; |
1877 | inf_status->stop_stack_dummy = stop_stack_dummy; | |
1878 | inf_status->stopped_by_random_signal = stopped_by_random_signal; | |
1879 | inf_status->trap_expected = trap_expected; | |
1880 | inf_status->step_range_start = step_range_start; | |
1881 | inf_status->step_range_end = step_range_end; | |
1882 | inf_status->step_frame_address = step_frame_address; | |
1883 | inf_status->step_over_calls = step_over_calls; | |
bd5635a1 RP |
1884 | inf_status->stop_after_trap = stop_after_trap; |
1885 | inf_status->stop_soon_quietly = stop_soon_quietly; | |
1886 | /* Save original bpstat chain here; replace it with copy of chain. | |
1887 | If caller's caller is walking the chain, they'll be happier if we | |
1888 | hand them back the original chain when restore_i_s is called. */ | |
1889 | inf_status->stop_bpstat = stop_bpstat; | |
1890 | stop_bpstat = bpstat_copy (stop_bpstat); | |
1891 | inf_status->breakpoint_proceeded = breakpoint_proceeded; | |
1892 | inf_status->restore_stack_info = restore_stack_info; | |
1893 | inf_status->proceed_to_finish = proceed_to_finish; | |
1894 | ||
072b552a | 1895 | memcpy (inf_status->stop_registers, stop_registers, REGISTER_BYTES); |
37c99ddb JK |
1896 | |
1897 | read_register_bytes (0, inf_status->registers, REGISTER_BYTES); | |
1898 | ||
bd5635a1 RP |
1899 | record_selected_frame (&(inf_status->selected_frame_address), |
1900 | &(inf_status->selected_level)); | |
1901 | return; | |
1902 | } | |
1903 | ||
37c99ddb | 1904 | struct restore_selected_frame_args { |
4cc1b3f7 | 1905 | CORE_ADDR frame_address; |
37c99ddb JK |
1906 | int level; |
1907 | }; | |
1908 | ||
1909 | static int restore_selected_frame PARAMS ((char *)); | |
1910 | ||
1911 | /* Restore the selected frame. args is really a struct | |
1912 | restore_selected_frame_args * (declared as char * for catch_errors) | |
1913 | telling us what frame to restore. Returns 1 for success, or 0 for | |
1914 | failure. An error message will have been printed on error. */ | |
4cc1b3f7 | 1915 | |
37c99ddb JK |
1916 | static int |
1917 | restore_selected_frame (args) | |
1918 | char *args; | |
1919 | { | |
1920 | struct restore_selected_frame_args *fr = | |
1921 | (struct restore_selected_frame_args *) args; | |
4cc1b3f7 | 1922 | struct frame_info *frame; |
37c99ddb JK |
1923 | int level = fr->level; |
1924 | ||
4cc1b3f7 | 1925 | frame = find_relative_frame (get_current_frame (), &level); |
37c99ddb JK |
1926 | |
1927 | /* If inf_status->selected_frame_address is NULL, there was no | |
1928 | previously selected frame. */ | |
4cc1b3f7 JK |
1929 | if (frame == NULL || |
1930 | FRAME_FP (frame) != fr->frame_address || | |
37c99ddb JK |
1931 | level != 0) |
1932 | { | |
1933 | warning ("Unable to restore previously selected frame.\n"); | |
1934 | return 0; | |
1935 | } | |
4cc1b3f7 | 1936 | select_frame (frame, fr->level); |
37c99ddb JK |
1937 | return(1); |
1938 | } | |
1939 | ||
bd5635a1 RP |
1940 | void |
1941 | restore_inferior_status (inf_status) | |
1942 | struct inferior_status *inf_status; | |
1943 | { | |
bd5635a1 RP |
1944 | stop_signal = inf_status->stop_signal; |
1945 | stop_pc = inf_status->stop_pc; | |
bd5635a1 RP |
1946 | stop_step = inf_status->stop_step; |
1947 | stop_stack_dummy = inf_status->stop_stack_dummy; | |
1948 | stopped_by_random_signal = inf_status->stopped_by_random_signal; | |
1949 | trap_expected = inf_status->trap_expected; | |
1950 | step_range_start = inf_status->step_range_start; | |
1951 | step_range_end = inf_status->step_range_end; | |
1952 | step_frame_address = inf_status->step_frame_address; | |
1953 | step_over_calls = inf_status->step_over_calls; | |
bd5635a1 RP |
1954 | stop_after_trap = inf_status->stop_after_trap; |
1955 | stop_soon_quietly = inf_status->stop_soon_quietly; | |
1956 | bpstat_clear (&stop_bpstat); | |
1957 | stop_bpstat = inf_status->stop_bpstat; | |
1958 | breakpoint_proceeded = inf_status->breakpoint_proceeded; | |
1959 | proceed_to_finish = inf_status->proceed_to_finish; | |
1960 | ||
072b552a | 1961 | memcpy (stop_registers, inf_status->stop_registers, REGISTER_BYTES); |
bd5635a1 RP |
1962 | |
1963 | /* The inferior can be gone if the user types "print exit(0)" | |
1964 | (and perhaps other times). */ | |
37c99ddb JK |
1965 | if (target_has_execution) |
1966 | write_register_bytes (0, inf_status->registers, REGISTER_BYTES); | |
1967 | ||
1968 | /* The inferior can be gone if the user types "print exit(0)" | |
1969 | (and perhaps other times). */ | |
1970 | ||
1971 | /* FIXME: If we are being called after stopping in a function which | |
1972 | is called from gdb, we should not be trying to restore the | |
1973 | selected frame; it just prints a spurious error message (The | |
1974 | message is useful, however, in detecting bugs in gdb (like if gdb | |
1975 | clobbers the stack)). In fact, should we be restoring the | |
1976 | inferior status at all in that case? . */ | |
1977 | ||
bd5635a1 RP |
1978 | if (target_has_stack && inf_status->restore_stack_info) |
1979 | { | |
37c99ddb JK |
1980 | struct restore_selected_frame_args fr; |
1981 | fr.level = inf_status->selected_level; | |
1982 | fr.frame_address = inf_status->selected_frame_address; | |
1983 | /* The point of catch_errors is that if the stack is clobbered, | |
1984 | walking the stack might encounter a garbage pointer and error() | |
1985 | trying to dereference it. */ | |
1986 | if (catch_errors (restore_selected_frame, &fr, | |
1987 | "Unable to restore previously selected frame:\n", | |
1988 | RETURN_MASK_ERROR) == 0) | |
1989 | /* Error in restoring the selected frame. Select the innermost | |
1990 | frame. */ | |
1991 | select_frame (get_current_frame (), 0); | |
bd5635a1 RP |
1992 | } |
1993 | } | |
1994 | ||
1995 | \f | |
1996 | void | |
1997 | _initialize_infrun () | |
1998 | { | |
1999 | register int i; | |
e37a6e9c | 2000 | register int numsigs; |
bd5635a1 RP |
2001 | |
2002 | add_info ("signals", signals_info, | |
2003 | "What debugger does when program gets various signals.\n\ | |
c66ed884 | 2004 | Specify a signal as argument to print info on that signal only."); |
6b50c5c2 | 2005 | add_info_alias ("handle", "signals", 0); |
bd5635a1 RP |
2006 | |
2007 | add_com ("handle", class_run, handle_command, | |
c66ed884 SG |
2008 | concat ("Specify how to handle a signal.\n\ |
2009 | Args are signals and actions to apply to those signals.\n\ | |
2010 | Symbolic signals (e.g. SIGSEGV) are recommended but numeric signals\n\ | |
2011 | from 1-15 are allowed for compatibility with old versions of GDB.\n\ | |
2012 | Numeric ranges may be specified with the form LOW-HIGH (e.g. 1-5).\n\ | |
072b552a | 2013 | The special arg \"all\" is recognized to mean all signals except those\n\ |
c66ed884 SG |
2014 | used by the debugger, typically SIGTRAP and SIGINT.\n", |
2015 | "Recognized actions include \"stop\", \"nostop\", \"print\", \"noprint\",\n\ | |
072b552a | 2016 | \"pass\", \"nopass\", \"ignore\", or \"noignore\".\n\ |
bd5635a1 | 2017 | Stop means reenter debugger if this signal happens (implies print).\n\ |
072b552a | 2018 | Print means print a message if this signal happens.\n\ |
bd5635a1 | 2019 | Pass means let program see this signal; otherwise program doesn't know.\n\ |
072b552a | 2020 | Ignore is a synonym for nopass and noignore is a synonym for pass.\n\ |
c66ed884 | 2021 | Pass and Stop may be combined.", NULL)); |
bd5635a1 | 2022 | |
a8a69e63 | 2023 | stop_command = add_cmd ("stop", class_obscure, not_just_help_class_command, |
3950a34e RP |
2024 | "There is no `stop' command, but you can set a hook on `stop'.\n\ |
2025 | This allows you to set a list of commands to be run each time execution\n\ | |
fee44494 | 2026 | of the program stops.", &cmdlist); |
3950a34e | 2027 | |
67ac9759 JK |
2028 | numsigs = (int)TARGET_SIGNAL_LAST; |
2029 | signal_stop = (unsigned char *) | |
2030 | xmalloc (sizeof (signal_stop[0]) * numsigs); | |
2031 | signal_print = (unsigned char *) | |
2032 | xmalloc (sizeof (signal_print[0]) * numsigs); | |
072b552a | 2033 | signal_program = (unsigned char *) |
67ac9759 | 2034 | xmalloc (sizeof (signal_program[0]) * numsigs); |
e37a6e9c | 2035 | for (i = 0; i < numsigs; i++) |
bd5635a1 RP |
2036 | { |
2037 | signal_stop[i] = 1; | |
2038 | signal_print[i] = 1; | |
2039 | signal_program[i] = 1; | |
2040 | } | |
2041 | ||
2042 | /* Signals caused by debugger's own actions | |
2043 | should not be given to the program afterwards. */ | |
67ac9759 JK |
2044 | signal_program[TARGET_SIGNAL_TRAP] = 0; |
2045 | signal_program[TARGET_SIGNAL_INT] = 0; | |
bd5635a1 RP |
2046 | |
2047 | /* Signals that are not errors should not normally enter the debugger. */ | |
67ac9759 JK |
2048 | signal_stop[TARGET_SIGNAL_ALRM] = 0; |
2049 | signal_print[TARGET_SIGNAL_ALRM] = 0; | |
2050 | signal_stop[TARGET_SIGNAL_VTALRM] = 0; | |
2051 | signal_print[TARGET_SIGNAL_VTALRM] = 0; | |
2052 | signal_stop[TARGET_SIGNAL_PROF] = 0; | |
2053 | signal_print[TARGET_SIGNAL_PROF] = 0; | |
2054 | signal_stop[TARGET_SIGNAL_CHLD] = 0; | |
2055 | signal_print[TARGET_SIGNAL_CHLD] = 0; | |
2056 | signal_stop[TARGET_SIGNAL_IO] = 0; | |
2057 | signal_print[TARGET_SIGNAL_IO] = 0; | |
4d4f2d50 JK |
2058 | signal_stop[TARGET_SIGNAL_POLL] = 0; |
2059 | signal_print[TARGET_SIGNAL_POLL] = 0; | |
67ac9759 JK |
2060 | signal_stop[TARGET_SIGNAL_URG] = 0; |
2061 | signal_print[TARGET_SIGNAL_URG] = 0; | |
bd5635a1 | 2062 | } |