1 /* Target-struct-independent code to start (run) and stop an inferior process.
2 Copyright 1986, 1987, 1988, 1989, 1991, 1992 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
20 /* Notes on the algorithm used in wait_for_inferior to determine if we
21 just did a subroutine call when stepping. We have the following
22 information at that point:
24 Current and previous (just before this step) pc.
25 Current and previous sp.
26 Current and previous start of current function.
28 If the starts of the functions don't match, then
30 a) We did a subroutine call.
32 In this case, the pc will be at the beginning of a function.
34 b) We did a subroutine return.
40 If we did a longjump, we were doing "nexti", since a next would
41 have attempted to skip over the assembly language routine in which
42 the longjmp is coded and would have simply been the equivalent of a
43 continue. I consider this ok behaivior. We'd like one of two
44 things to happen if we are doing a nexti through the longjmp()
45 routine: 1) It behaves as a stepi, or 2) It acts like a continue as
46 above. Given that this is a special case, and that anybody who
47 thinks that the concept of sub calls is meaningful in the context
48 of a longjmp, I'll take either one. Let's see what happens.
50 Acts like a subroutine return. I can handle that with no problem
53 -->So: If the current and previous beginnings of the current
54 function don't match, *and* the pc is at the start of a function,
55 we've done a subroutine call. If the pc is not at the start of a
56 function, we *didn't* do a subroutine call.
58 -->If the beginnings of the current and previous function do match,
61 a) We just did a recursive call.
63 In this case, we would be at the very beginning of a
64 function and 1) it will have a prologue (don't jump to
65 before prologue, or 2) (we assume here that it doesn't have
66 a prologue) there will have been a change in the stack
67 pointer over the last instruction. (Ie. it's got to put
68 the saved pc somewhere. The stack is the usual place. In
69 a recursive call a register is only an option if there's a
70 prologue to do something with it. This is even true on
71 register window machines; the prologue sets up the new
72 window. It might not be true on a register window machine
73 where the call instruction moved the register window
74 itself. Hmmm. One would hope that the stack pointer would
75 also change. If it doesn't, somebody send me a note, and
76 I'll work out a more general theory.
77 bug-gdb@prep.ai.mit.edu). This is true (albeit slipperly
78 so) on all machines I'm aware of:
80 m68k: Call changes stack pointer. Regular jumps don't.
82 sparc: Recursive calls must have frames and therefor,
85 vax: All calls have frames and hence change the
88 b) We did a return from a recursive call. I don't see that we
89 have either the ability or the need to distinguish this
90 from an ordinary jump. The stack frame will be printed
91 when and if the frame pointer changes; if we are in a
92 function without a frame pointer, it's the users own
95 c) We did a jump within a function. We assume that this is
96 true if we didn't do a recursive call.
98 d) We are in no-man's land ("I see no symbols here"). We
99 don't worry about this; it will make calls look like simple
100 jumps (and the stack frames will be printed when the frame
101 pointer moves), which is a reasonably non-violent response.
108 #include "inferior.h"
109 #include "breakpoint.h"
117 /* unistd.h is needed to #define X_OK */
121 #include <sys/file.h>
124 /* Prototypes for local functions */
127 signals_info
PARAMS ((char *, int));
130 handle_command
PARAMS ((char *, int));
133 sig_print_info
PARAMS ((int));
136 sig_print_header
PARAMS ((void));
139 remove_step_breakpoint
PARAMS ((void));
142 insert_step_breakpoint
PARAMS ((void));
145 resume_cleanups
PARAMS ((int));
147 /* Sigtramp is a routine that the kernel calls (which then calls the
148 signal handler). On most machines it is a library routine that
149 is linked into the executable.
151 This macro, given a program counter value and the name of the
152 function in which that PC resides (which can be null if the
153 name is not known), returns nonzero if the PC and name show
154 that we are in sigtramp.
156 On most machines just see if the name is sigtramp (and if we have
157 no name, assume we are not in sigtramp). */
158 #if !defined (IN_SIGTRAMP)
159 #define IN_SIGTRAMP(pc, name) \
160 (name && !strcmp ("_sigtramp", name))
163 /* GET_LONGJMP_TARGET returns the PC at which longjmp() will resume the
164 program. It needs to examine the jmp_buf argument and extract the PC
165 from it. The return value is non-zero on success, zero otherwise. */
166 #ifndef GET_LONGJMP_TARGET
167 #define GET_LONGJMP_TARGET(PC_ADDR) 0
171 /* Some machines have trampoline code that sits between function callers
172 and the actual functions themselves. If this machine doesn't have
173 such things, disable their processing. */
174 #ifndef SKIP_TRAMPOLINE_CODE
175 #define SKIP_TRAMPOLINE_CODE(pc) 0
178 /* For SVR4 shared libraries, each call goes through a small piece of
179 trampoline code in the ".init" section. IN_SOLIB_TRAMPOLINE evaluates
180 to nonzero if we are current stopped in one of these. */
181 #ifndef IN_SOLIB_TRAMPOLINE
182 #define IN_SOLIB_TRAMPOLINE(pc,name) 0
185 /* Notify other parts of gdb that might care that signal handling may
186 have changed for one or more signals. */
187 #ifndef NOTICE_SIGNAL_HANDLING_CHANGE
188 #define NOTICE_SIGNAL_HANDLING_CHANGE /* No actions */
193 int safe_to_init_tdesc_context
= 0;
194 extern dc_dcontext_t current_context
;
197 /* Tables of how to react to signals; the user sets them. */
199 static unsigned char *signal_stop
;
200 static unsigned char *signal_print
;
201 static unsigned char *signal_program
;
203 #define SET_SIGS(nsigs,sigs,flags) \
205 int signum = (nsigs); \
206 while (signum-- > 0) \
207 if ((sigs)[signum]) \
208 (flags)[signum] = 1; \
211 #define UNSET_SIGS(nsigs,sigs,flags) \
213 int signum = (nsigs); \
214 while (signum-- > 0) \
215 if ((sigs)[signum]) \
216 (flags)[signum] = 0; \
219 /* Nonzero if breakpoints are now inserted in the inferior. */
220 /* Nonstatic for initialization during xxx_create_inferior. FIXME. */
222 /*static*/ int breakpoints_inserted
;
224 /* Function inferior was in as of last step command. */
226 static struct symbol
*step_start_function
;
228 /* Nonzero => address for special breakpoint for resuming stepping. */
230 static CORE_ADDR step_resume_break_address
;
232 /* Pointer to orig contents of the byte where the special breakpoint is. */
234 static char step_resume_break_shadow
[BREAKPOINT_MAX
];
236 /* Nonzero means the special breakpoint is a duplicate
237 so it has not itself been inserted. */
239 static int step_resume_break_duplicate
;
241 /* Nonzero if we are expecting a trace trap and should proceed from it. */
243 static int trap_expected
;
245 /* Nonzero if the next time we try to continue the inferior, it will
246 step one instruction and generate a spurious trace trap.
247 This is used to compensate for a bug in HP-UX. */
249 static int trap_expected_after_continue
;
251 /* Nonzero means expecting a trace trap
252 and should stop the inferior and return silently when it happens. */
256 /* Nonzero means expecting a trap and caller will handle it themselves.
257 It is used after attach, due to attaching to a process;
258 when running in the shell before the child program has been exec'd;
259 and when running some kinds of remote stuff (FIXME?). */
261 int stop_soon_quietly
;
263 /* Nonzero if pc has been changed by the debugger
264 since the inferior stopped. */
268 /* Nonzero if proceed is being used for a "finish" command or a similar
269 situation when stop_registers should be saved. */
271 int proceed_to_finish
;
273 /* Save register contents here when about to pop a stack dummy frame,
274 if-and-only-if proceed_to_finish is set.
275 Thus this contains the return value from the called function (assuming
276 values are returned in a register). */
278 char stop_registers
[REGISTER_BYTES
];
280 /* Nonzero if program stopped due to error trying to insert breakpoints. */
282 static int breakpoints_failed
;
284 /* Nonzero after stop if current stack frame should be printed. */
286 static int stop_print_frame
;
288 #ifdef NO_SINGLE_STEP
289 extern int one_stepped
; /* From machine dependent code */
290 extern void single_step (); /* Same. */
291 #endif /* NO_SINGLE_STEP */
294 /* Things to clean up if we QUIT out of resume (). */
297 resume_cleanups (arg
)
303 /* Resume the inferior, but allow a QUIT. This is useful if the user
304 wants to interrupt some lengthy single-stepping operation
305 (for child processes, the SIGINT goes to the inferior, and so
306 we get a SIGINT random_signal, but for remote debugging and perhaps
307 other targets, that's not true).
309 STEP nonzero if we should step (zero to continue instead).
310 SIG is the signal to give the inferior (zero for none). */
316 struct cleanup
*old_cleanups
= make_cleanup (resume_cleanups
, 0);
319 #ifdef NO_SINGLE_STEP
321 single_step(sig
); /* Do it the hard way, w/temp breakpoints */
322 step
= 0; /* ...and don't ask hardware to do it. */
326 /* Handle any optimized stores to the inferior NOW... */
327 #ifdef DO_DEFERRED_STORES
331 target_resume (step
, sig
);
332 discard_cleanups (old_cleanups
);
336 /* Clear out all variables saying what to do when inferior is continued.
337 First do this, then set the ones you want, then call `proceed'. */
340 clear_proceed_status ()
343 step_range_start
= 0;
345 step_frame_address
= 0;
346 step_over_calls
= -1;
347 step_resume_break_address
= 0;
349 stop_soon_quietly
= 0;
350 proceed_to_finish
= 0;
351 breakpoint_proceeded
= 1; /* We're about to proceed... */
353 /* Discard any remaining commands or status from previous stop. */
354 bpstat_clear (&stop_bpstat
);
357 /* Basic routine for continuing the program in various fashions.
359 ADDR is the address to resume at, or -1 for resume where stopped.
360 SIGGNAL is the signal to give it, or 0 for none,
361 or -1 for act according to how it stopped.
362 STEP is nonzero if should trap after one instruction.
363 -1 means return after that and print nothing.
364 You should probably set various step_... variables
365 before calling here, if you are stepping.
367 You should call clear_proceed_status before calling proceed. */
370 proceed (addr
, siggnal
, step
)
378 step_start_function
= find_pc_function (read_pc ());
382 if (addr
== (CORE_ADDR
)-1)
384 /* If there is a breakpoint at the address we will resume at,
385 step one instruction before inserting breakpoints
386 so that we do not stop right away. */
388 if (!pc_changed
&& breakpoint_here_p (read_pc ()))
393 write_register (PC_REGNUM
, addr
);
395 write_register (NPC_REGNUM
, addr
+ 4);
397 write_register (NNPC_REGNUM
, addr
+ 8);
402 if (trap_expected_after_continue
)
404 /* If (step == 0), a trap will be automatically generated after
405 the first instruction is executed. Force step one
406 instruction to clear this condition. This should not occur
407 if step is nonzero, but it is harmless in that case. */
409 trap_expected_after_continue
= 0;
413 /* We will get a trace trap after one instruction.
414 Continue it automatically and insert breakpoints then. */
418 int temp
= insert_breakpoints ();
421 print_sys_errmsg ("ptrace", temp
);
422 error ("Cannot insert breakpoints.\n\
423 The same program may be running in another process.");
425 breakpoints_inserted
= 1;
428 /* Install inferior's terminal modes. */
429 target_terminal_inferior ();
432 stop_signal
= siggnal
;
433 /* If this signal should not be seen by program,
434 give it zero. Used for debugging signals. */
435 else if (stop_signal
< NSIG
&& !signal_program
[stop_signal
])
438 /* Resume inferior. */
439 resume (oneproc
|| step
|| bpstat_should_step (), stop_signal
);
441 /* Wait for it to stop (if not standalone)
442 and in any case decode why it stopped, and act accordingly. */
444 wait_for_inferior ();
448 /* Record the pc and sp of the program the last time it stopped.
449 These are just used internally by wait_for_inferior, but need
450 to be preserved over calls to it and cleared when the inferior
452 static CORE_ADDR prev_pc
;
453 static CORE_ADDR prev_sp
;
454 static CORE_ADDR prev_func_start
;
455 static char *prev_func_name
;
458 /* Start remote-debugging of a machine over a serial link. */
463 init_wait_for_inferior ();
464 clear_proceed_status ();
465 stop_soon_quietly
= 1;
467 wait_for_inferior ();
471 /* Initialize static vars when a new inferior begins. */
474 init_wait_for_inferior ()
476 /* These are meaningless until the first time through wait_for_inferior. */
480 prev_func_name
= NULL
;
482 trap_expected_after_continue
= 0;
483 breakpoints_inserted
= 0;
484 mark_breakpoints_out ();
485 stop_signal
= 0; /* Don't confuse first call to proceed(). */
490 /* Wait for control to return from inferior to debugger.
491 If inferior gets a signal, we may decide to start it up again
492 instead of returning. That is why there is a loop in this function.
493 When this function actually returns it means the inferior
494 should be left stopped and GDB should read more commands. */
503 CORE_ADDR stop_func_start
;
504 char *stop_func_name
;
505 CORE_ADDR prologue_pc
, tmp
;
506 int stop_step_resume_break
;
507 struct symtab_and_line sal
;
508 int remove_breakpoints_on_following_step
= 0;
510 int handling_longjmp
= 0; /* FIXME */
512 sal
= find_pc_line(prev_pc
, 0);
513 current_line
= sal
.line
;
517 /* Clean up saved state that will become invalid. */
519 flush_cached_frames ();
520 registers_changed ();
524 #ifdef SIGTRAP_STOP_AFTER_LOAD
526 /* Somebody called load(2), and it gave us a "trap signal after load".
527 Ignore it gracefully. */
529 SIGTRAP_STOP_AFTER_LOAD (w
);
532 /* See if the process still exists; clean up if it doesn't. */
535 target_terminal_ours (); /* Must do this before mourn anyway */
537 printf_filtered ("\nProgram exited with code 0%o.\n",
538 (unsigned int)WEXITSTATUS (w
));
541 printf_filtered ("\nProgram exited normally.\n");
543 target_mourn_inferior ();
544 #ifdef NO_SINGLE_STEP
547 stop_print_frame
= 0;
550 else if (!WIFSTOPPED (w
))
552 stop_print_frame
= 0;
553 stop_signal
= WTERMSIG (w
);
554 target_terminal_ours (); /* Must do this before mourn anyway */
555 target_kill (); /* kill mourns as well */
556 #ifdef PRINT_RANDOM_SIGNAL
557 printf_filtered ("\nProgram terminated: ");
558 PRINT_RANDOM_SIGNAL (stop_signal
);
560 printf_filtered ("\nProgram terminated with signal %d, %s\n",
561 stop_signal
, safe_strsignal (stop_signal
));
563 printf_filtered ("The inferior process no longer exists.\n");
565 #ifdef NO_SINGLE_STEP
571 #ifdef NO_SINGLE_STEP
573 single_step (0); /* This actually cleans up the ss */
574 #endif /* NO_SINGLE_STEP */
576 stop_pc
= read_pc ();
577 set_current_frame ( create_new_frame (read_register (FP_REGNUM
),
580 stop_frame_address
= FRAME_FP (get_current_frame ());
581 stop_sp
= read_register (SP_REGNUM
);
584 /* Don't care about return value; stop_func_start and stop_func_name
585 will both be 0 if it doesn't work. */
586 find_pc_partial_function (stop_pc
, &stop_func_name
, &stop_func_start
);
587 stop_func_start
+= FUNCTION_START_OFFSET
;
589 bpstat_clear (&stop_bpstat
);
591 stop_stack_dummy
= 0;
592 stop_print_frame
= 1;
593 stop_step_resume_break
= 0;
595 stopped_by_random_signal
= 0;
596 breakpoints_failed
= 0;
598 /* Look at the cause of the stop, and decide what to do.
599 The alternatives are:
600 1) break; to really stop and return to the debugger,
601 2) drop through to start up again
602 (set another_trap to 1 to single step once)
603 3) set random_signal to 1, and the decision between 1 and 2
604 will be made according to the signal handling tables. */
606 stop_signal
= WSTOPSIG (w
);
608 /* First, distinguish signals caused by the debugger from signals
609 that have to do with the program's own actions.
610 Note that breakpoint insns may cause SIGTRAP or SIGILL
611 or SIGEMT, depending on the operating system version.
612 Here we detect when a SIGILL or SIGEMT is really a breakpoint
613 and change it to SIGTRAP. */
615 if (stop_signal
== SIGTRAP
616 || (breakpoints_inserted
&&
617 (stop_signal
== SIGILL
619 || stop_signal
== SIGEMT
622 || stop_soon_quietly
)
624 if (stop_signal
== SIGTRAP
&& stop_after_trap
)
626 stop_print_frame
= 0;
629 if (stop_soon_quietly
)
632 /* Don't even think about breakpoints
633 if just proceeded over a breakpoint.
635 However, if we are trying to proceed over a breakpoint
636 and end up in sigtramp, then step_resume_break_address
637 will be set and we should check whether we've hit the
639 if (stop_signal
== SIGTRAP
&& trap_expected
640 && step_resume_break_address
== 0)
641 bpstat_clear (&stop_bpstat
);
644 /* See if there is a breakpoint at the current PC. */
645 #if DECR_PC_AFTER_BREAK
646 /* Notice the case of stepping through a jump
647 that lands just after a breakpoint.
648 Don't confuse that with hitting the breakpoint.
649 What we check for is that 1) stepping is going on
650 and 2) the pc before the last insn does not match
651 the address of the breakpoint before the current pc. */
652 if (prev_pc
== stop_pc
- DECR_PC_AFTER_BREAK
654 || step_resume_break_address
655 || handling_longjmp
/* FIXME */)
656 #endif /* DECR_PC_AFTER_BREAK not zero */
658 /* See if we stopped at the special breakpoint for
659 stepping over a subroutine call. If both are zero,
660 this wasn't the reason for the stop. */
661 if (step_resume_break_address
662 && stop_pc
- DECR_PC_AFTER_BREAK
663 == step_resume_break_address
)
665 stop_step_resume_break
= 1;
666 if (DECR_PC_AFTER_BREAK
)
668 stop_pc
-= DECR_PC_AFTER_BREAK
;
669 write_register (PC_REGNUM
, stop_pc
);
676 bpstat_stop_status (&stop_pc
, stop_frame_address
);
677 /* Following in case break condition called a
679 stop_print_frame
= 1;
684 if (stop_signal
== SIGTRAP
)
686 = !(bpstat_explains_signal (stop_bpstat
)
688 || stop_step_resume_break
689 || PC_IN_CALL_DUMMY (stop_pc
, stop_sp
, stop_frame_address
)
690 || (step_range_end
&& !step_resume_break_address
));
694 = !(bpstat_explains_signal (stop_bpstat
)
695 || stop_step_resume_break
696 /* End of a stack dummy. Some systems (e.g. Sony
697 news) give another signal besides SIGTRAP,
698 so check here as well as above. */
699 || PC_IN_CALL_DUMMY (stop_pc
, stop_sp
, stop_frame_address
)
702 stop_signal
= SIGTRAP
;
708 /* For the program's own signals, act according to
709 the signal handling tables. */
713 /* Signal not for debugging purposes. */
716 stopped_by_random_signal
= 1;
718 if (stop_signal
>= NSIG
719 || signal_print
[stop_signal
])
722 target_terminal_ours_for_output ();
723 #ifdef PRINT_RANDOM_SIGNAL
724 PRINT_RANDOM_SIGNAL (stop_signal
);
726 printf_filtered ("\nProgram received signal %d, %s\n",
727 stop_signal
, safe_strsignal (stop_signal
));
728 #endif /* PRINT_RANDOM_SIGNAL */
731 if (stop_signal
>= NSIG
732 || signal_stop
[stop_signal
])
734 /* If not going to stop, give terminal back
735 if we took it away. */
737 target_terminal_inferior ();
739 /* Note that virtually all the code below does `if !random_signal'.
740 Perhaps this code should end with a goto or continue. At least
741 one (now fixed) bug was caused by this -- a !random_signal was
742 missing in one of the tests below. */
745 /* Handle cases caused by hitting a breakpoint. */
748 if (bpstat_explains_signal (stop_bpstat
))
750 CORE_ADDR jmp_buf_pc
;
752 switch (stop_bpstat
->breakpoint_at
->type
) /* FIXME */
754 /* If we hit the breakpoint at longjmp, disable it for the
755 duration of this command. Then, install a temporary
756 breakpoint at the target of the jmp_buf. */
758 disable_longjmp_breakpoint();
759 remove_breakpoints ();
760 breakpoints_inserted
= 0;
761 if (!GET_LONGJMP_TARGET(&jmp_buf_pc
)) goto keep_going
;
763 /* Need to blow away step-resume breakpoint, as it
764 interferes with us */
765 remove_step_breakpoint ();
766 step_resume_break_address
= 0;
767 stop_step_resume_break
= 0;
769 #if 0 /* FIXME - Need to implement nested temporary breakpoints */
770 if (step_over_calls
> 0)
771 set_longjmp_resume_breakpoint(jmp_buf_pc
,
772 get_current_frame());
775 set_longjmp_resume_breakpoint(jmp_buf_pc
, NULL
);
776 handling_longjmp
= 1; /* FIXME */
779 case bp_longjmp_resume
:
780 remove_breakpoints ();
781 breakpoints_inserted
= 0;
782 #if 0 /* FIXME - Need to implement nested temporary breakpoints */
784 && (stop_frame_address
785 INNER_THAN step_frame_address
))
791 disable_longjmp_breakpoint();
792 handling_longjmp
= 0; /* FIXME */
796 fprintf(stderr
, "Unknown breakpoint type %d\n",
797 stop_bpstat
->breakpoint_at
->type
);
802 /* Does a breakpoint want us to stop? */
803 if (bpstat_stop (stop_bpstat
))
805 stop_print_frame
= bpstat_should_print (stop_bpstat
);
808 /* Otherwise, must remove breakpoints and single-step
809 to get us past the one we hit. */
812 remove_breakpoints ();
813 remove_step_breakpoint ();
814 breakpoints_inserted
= 0;
820 else if (stop_step_resume_break
)
822 /* But if we have hit the step-resumption breakpoint,
823 remove it. It has done its job getting us here.
824 The sp test is to make sure that we don't get hung
825 up in recursive calls in functions without frame
826 pointers. If the stack pointer isn't outside of
827 where the breakpoint was set (within a routine to be
828 stepped over), we're in the middle of a recursive
829 call. Not true for reg window machines (sparc)
830 because the must change frames to call things and
831 the stack pointer doesn't have to change if it
832 the bp was set in a routine without a frame (pc can
833 be stored in some other window).
835 The removal of the sp test is to allow calls to
836 alloca. Nasty things were happening. Oh, well,
837 gdb can only handle one level deep of lack of
841 Disable test for step_frame_address match so that we always stop even if the
842 frames don't match. Reason: if we hit the step_resume_breakpoint, there is
843 no way to temporarily disable it so that we can step past it. If we leave
844 the breakpoint in, then we loop forever repeatedly hitting, but never
845 getting past the breakpoint. This change keeps nexting over recursive
846 function calls from hanging gdb.
849 if (* step_frame_address
== 0
850 || (step_frame_address
== stop_frame_address
))
853 remove_step_breakpoint ();
854 step_resume_break_address
= 0;
856 /* If were waiting for a trap, hitting the step_resume_break
857 doesn't count as getting it. */
863 /* We come here if we hit a breakpoint but should not
864 stop for it. Possibly we also were stepping
865 and should stop for that. So fall through and
866 test for stepping. But, if not stepping,
869 /* If this is the breakpoint at the end of a stack dummy,
870 just stop silently. */
872 && PC_IN_CALL_DUMMY (stop_pc
, stop_sp
, stop_frame_address
))
874 stop_print_frame
= 0;
875 stop_stack_dummy
= 1;
877 trap_expected_after_continue
= 1;
882 if (step_resume_break_address
)
883 /* Having a step-resume breakpoint overrides anything
884 else having to do with stepping commands until
885 that breakpoint is reached. */
887 /* If stepping through a line, keep going if still within it. */
888 else if (!random_signal
890 && stop_pc
>= step_range_start
891 && stop_pc
< step_range_end
892 /* The step range might include the start of the
893 function, so if we are at the start of the
894 step range and either the stack or frame pointers
895 just changed, we've stepped outside */
896 && !(stop_pc
== step_range_start
897 && stop_frame_address
898 && (stop_sp INNER_THAN prev_sp
899 || stop_frame_address
!= step_frame_address
)))
904 /* We stepped out of the stepping range. See if that was due
905 to a subroutine call that we should proceed to the end of. */
906 else if (!random_signal
&& step_range_end
)
910 prologue_pc
= stop_func_start
;
911 SKIP_PROLOGUE (prologue_pc
);
914 /* Did we just take a signal? */
915 if (IN_SIGTRAMP (stop_pc
, stop_func_name
)
916 && !IN_SIGTRAMP (prev_pc
, prev_func_name
))
918 /* This code is needed at least in the following case:
919 The user types "next" and then a signal arrives (before
920 the "next" is done). */
921 /* We've just taken a signal; go until we are back to
922 the point where we took it and one more. */
923 step_resume_break_address
= prev_pc
;
924 step_resume_break_duplicate
=
925 breakpoint_here_p (step_resume_break_address
);
926 if (breakpoints_inserted
)
927 insert_step_breakpoint ();
928 /* Make sure that the stepping range gets us past
930 if (step_range_end
== 1)
931 step_range_end
= (step_range_start
= prev_pc
) + 1;
932 remove_breakpoints_on_following_step
= 1;
936 /* ==> See comments at top of file on this algorithm. <==*/
938 if ((stop_pc
== stop_func_start
939 || IN_SOLIB_TRAMPOLINE (stop_pc
, stop_func_name
))
940 && (stop_func_start
!= prev_func_start
941 || prologue_pc
!= stop_func_start
942 || stop_sp
!= prev_sp
))
944 /* It's a subroutine call.
945 (0) If we are not stepping over any calls ("stepi"), we
947 (1) If we're doing a "next", we want to continue through
948 the call ("step over the call").
949 (2) If we are in a function-call trampoline (a stub between
950 the calling routine and the real function), locate
951 the real function and change stop_func_start.
952 (3) If we're doing a "step", and there are no debug symbols
953 at the target of the call, we want to continue through
954 it ("step over the call").
955 (4) Otherwise, we want to stop soon, after the function
956 prologue ("step into the call"). */
958 if (step_over_calls
== 0)
960 /* I presume that step_over_calls is only 0 when we're
961 supposed to be stepping at the assembly language level. */
966 if (step_over_calls
> 0)
967 goto step_over_function
;
969 tmp
= SKIP_TRAMPOLINE_CODE (stop_pc
);
971 stop_func_start
= tmp
;
973 if (find_pc_function (stop_func_start
) != 0)
974 goto step_into_function
;
977 /* A subroutine call has happened. */
978 /* Set a special breakpoint after the return */
979 step_resume_break_address
=
981 (SAVED_PC_AFTER_CALL (get_current_frame ()));
982 step_resume_break_duplicate
983 = breakpoint_here_p (step_resume_break_address
);
984 if (breakpoints_inserted
)
985 insert_step_breakpoint ();
989 /* Subroutine call with source code we should not step over.
990 Do step to the first line of code in it. */
991 SKIP_PROLOGUE (stop_func_start
);
992 sal
= find_pc_line (stop_func_start
, 0);
993 /* Use the step_resume_break to step until
994 the end of the prologue, even if that involves jumps
995 (as it seems to on the vax under 4.2). */
996 /* If the prologue ends in the middle of a source line,
997 continue to the end of that source line.
998 Otherwise, just go to end of prologue. */
999 #ifdef PROLOGUE_FIRSTLINE_OVERLAP
1000 /* no, don't either. It skips any code that's
1001 legitimately on the first line. */
1003 if (sal
.end
&& sal
.pc
!= stop_func_start
)
1004 stop_func_start
= sal
.end
;
1007 if (stop_func_start
== stop_pc
)
1009 /* We are already there: stop now. */
1014 /* Put the step-breakpoint there and go until there. */
1016 step_resume_break_address
= stop_func_start
;
1018 step_resume_break_duplicate
1019 = breakpoint_here_p (step_resume_break_address
);
1020 if (breakpoints_inserted
)
1021 insert_step_breakpoint ();
1022 /* Do not specify what the fp should be when we stop
1023 since on some machines the prologue
1024 is where the new fp value is established. */
1025 step_frame_address
= 0;
1026 /* And make sure stepping stops right away then. */
1027 step_range_end
= step_range_start
;
1032 /* We've wandered out of the step range (but haven't done a
1033 subroutine call or return). */
1035 sal
= find_pc_line(stop_pc
, 0);
1037 if (step_range_end
== 1 || /* stepi or nexti */
1038 sal
.line
== 0 || /* ...or no line # info */
1039 (stop_pc
== sal
.pc
/* ...or we're at the start */
1040 && current_line
!= sal
.line
)) { /* of a different line */
1041 /* Stop because we're done stepping. */
1045 /* We aren't done stepping, and we have line number info for $pc.
1046 Optimize by setting the step_range for the line.
1047 (We might not be in the original line, but if we entered a
1048 new line in mid-statement, we continue stepping. This makes
1049 things like for(;;) statements work better.) */
1050 step_range_start
= sal
.pc
;
1051 step_range_end
= sal
.end
;
1054 /* We never fall through here */
1058 && IN_SIGTRAMP (stop_pc
, stop_func_name
)
1059 && !IN_SIGTRAMP (prev_pc
, prev_func_name
))
1061 /* What has happened here is that we have just stepped the inferior
1062 with a signal (because it is a signal which shouldn't make
1063 us stop), thus stepping into sigtramp.
1065 So we need to set a step_resume_break_address breakpoint
1066 and continue until we hit it, and then step. */
1067 step_resume_break_address
= prev_pc
;
1068 /* Always 1, I think, but it's probably easier to have
1069 the step_resume_break as usual rather than trying to
1070 re-use the breakpoint which is already there. */
1071 step_resume_break_duplicate
=
1072 breakpoint_here_p (step_resume_break_address
);
1073 if (breakpoints_inserted
)
1074 insert_step_breakpoint ();
1075 remove_breakpoints_on_following_step
= 1;
1079 /* My apologies to the gods of structured programming. */
1080 /* Come to this label when you need to resume the inferior. It's really much
1081 cleaner at this time to do a goto than to try and figure out what the
1082 if-else chain ought to look like!! */
1087 /* Save the pc before execution, to compare with pc after stop. */
1088 prev_pc
= read_pc (); /* Might have been DECR_AFTER_BREAK */
1089 prev_func_start
= stop_func_start
; /* Ok, since if DECR_PC_AFTER
1090 BREAK is defined, the
1091 original pc would not have
1092 been at the start of a
1094 prev_func_name
= stop_func_name
;
1097 /* If we did not do break;, it means we should keep
1098 running the inferior and not return to debugger. */
1100 if (trap_expected
&& stop_signal
!= SIGTRAP
)
1102 /* We took a signal (which we are supposed to pass through to
1103 the inferior, else we'd have done a break above) and we
1104 haven't yet gotten our trap. Simply continue. */
1105 resume ((step_range_end
&& !step_resume_break_address
)
1106 || (trap_expected
&& !step_resume_break_address
)
1107 || bpstat_should_step (),
1112 /* Either the trap was not expected, but we are continuing
1113 anyway (the user asked that this signal be passed to the
1116 The signal was SIGTRAP, e.g. it was our signal, but we
1117 decided we should resume from it.
1119 We're going to run this baby now!
1121 Insert breakpoints now, unless we are trying
1122 to one-proceed past a breakpoint. */
1123 /* If we've just finished a special step resume and we don't
1124 want to hit a breakpoint, pull em out. */
1125 if (!step_resume_break_address
&&
1126 remove_breakpoints_on_following_step
)
1128 remove_breakpoints_on_following_step
= 0;
1129 remove_breakpoints ();
1130 breakpoints_inserted
= 0;
1132 else if (!breakpoints_inserted
&&
1133 (step_resume_break_address
!= 0 || !another_trap
))
1135 insert_step_breakpoint ();
1136 breakpoints_failed
= insert_breakpoints ();
1137 if (breakpoints_failed
)
1139 breakpoints_inserted
= 1;
1142 trap_expected
= another_trap
;
1144 if (stop_signal
== SIGTRAP
)
1147 #ifdef SHIFT_INST_REGS
1148 /* I'm not sure when this following segment applies. I do know, now,
1149 that we shouldn't rewrite the regs when we were stopped by a
1150 random signal from the inferior process. */
1152 if (!bpstat_explains_signal (stop_bpstat
)
1153 && (stop_signal
!= SIGCLD
)
1154 && !stopped_by_random_signal
)
1156 CORE_ADDR pc_contents
= read_register (PC_REGNUM
);
1157 CORE_ADDR npc_contents
= read_register (NPC_REGNUM
);
1158 if (pc_contents
!= npc_contents
)
1160 write_register (NNPC_REGNUM
, npc_contents
);
1161 write_register (NPC_REGNUM
, pc_contents
);
1164 #endif /* SHIFT_INST_REGS */
1166 resume ((!step_resume_break_address
1167 && !handling_longjmp
1170 || bpstat_should_step (),
1176 if (target_has_execution
)
1178 /* Assuming the inferior still exists, set these up for next
1179 time, just like we did above if we didn't break out of the
1181 prev_pc
= read_pc ();
1182 prev_func_start
= stop_func_start
;
1183 prev_func_name
= stop_func_name
;
1188 /* Here to return control to GDB when the inferior stops for real.
1189 Print appropriate messages, remove breakpoints, give terminal our modes.
1191 STOP_PRINT_FRAME nonzero means print the executing frame
1192 (pc, function, args, file, line number and line text).
1193 BREAKPOINTS_FAILED nonzero means stop was due to error
1194 attempting to insert breakpoints. */
1199 /* Make sure that the current_frame's pc is correct. This
1200 is a correction for setting up the frame info before doing
1201 DECR_PC_AFTER_BREAK */
1202 if (target_has_execution
)
1203 (get_current_frame ())->pc
= read_pc ();
1205 if (breakpoints_failed
)
1207 target_terminal_ours_for_output ();
1208 print_sys_errmsg ("ptrace", breakpoints_failed
);
1209 printf_filtered ("Stopped; cannot insert breakpoints.\n\
1210 The same program may be running in another process.\n");
1213 if (target_has_execution
)
1214 remove_step_breakpoint ();
1216 if (target_has_execution
&& breakpoints_inserted
)
1217 if (remove_breakpoints ())
1219 target_terminal_ours_for_output ();
1220 printf_filtered ("Cannot remove breakpoints because program is no longer writable.\n\
1221 It might be running in another process.\n\
1222 Further execution is probably impossible.\n");
1225 breakpoints_inserted
= 0;
1227 /* Delete the breakpoint we stopped at, if it wants to be deleted.
1228 Delete any breakpoint that is to be deleted at the next stop. */
1230 breakpoint_auto_delete (stop_bpstat
);
1232 /* If an auto-display called a function and that got a signal,
1233 delete that auto-display to avoid an infinite recursion. */
1235 if (stopped_by_random_signal
)
1236 disable_current_display ();
1238 if (step_multi
&& stop_step
)
1241 target_terminal_ours ();
1243 if (!target_has_stack
)
1246 /* Select innermost stack frame except on return from a stack dummy routine,
1247 or if the program has exited. Print it without a level number if
1248 we have changed functions or hit a breakpoint. Print source line
1250 if (!stop_stack_dummy
)
1252 select_frame (get_current_frame (), 0);
1254 if (stop_print_frame
)
1258 source_only
= bpstat_print (stop_bpstat
);
1259 source_only
= source_only
||
1261 && step_frame_address
== stop_frame_address
1262 && step_start_function
== find_pc_function (stop_pc
));
1264 print_stack_frame (selected_frame
, -1, source_only
? -1: 1);
1266 /* Display the auto-display expressions. */
1271 /* Save the function value return registers, if we care.
1272 We might be about to restore their previous contents. */
1273 if (proceed_to_finish
)
1274 read_register_bytes (0, stop_registers
, REGISTER_BYTES
);
1276 if (stop_stack_dummy
)
1278 /* Pop the empty frame that contains the stack dummy.
1279 POP_FRAME ends with a setting of the current frame, so we
1280 can use that next. */
1282 select_frame (get_current_frame (), 0);
1287 insert_step_breakpoint ()
1289 if (step_resume_break_address
&& !step_resume_break_duplicate
)
1290 target_insert_breakpoint (step_resume_break_address
,
1291 step_resume_break_shadow
);
1295 remove_step_breakpoint ()
1297 if (step_resume_break_address
&& !step_resume_break_duplicate
)
1298 target_remove_breakpoint (step_resume_break_address
,
1299 step_resume_break_shadow
);
1302 int signal_stop_state (signo
)
1305 return ((signo
>= 0 && signo
< NSIG
) ? signal_stop
[signo
] : 0);
1308 int signal_print_state (signo
)
1311 return ((signo
>= 0 && signo
< NSIG
) ? signal_print
[signo
] : 0);
1314 int signal_pass_state (signo
)
1317 return ((signo
>= 0 && signo
< NSIG
) ? signal_program
[signo
] : 0);
1323 printf_filtered ("Signal\t\tStop\tPrint\tPass to program\tDescription\n");
1327 sig_print_info (number
)
1332 if ((name
= strsigno (number
)) == NULL
)
1333 printf_filtered ("%d\t\t", number
);
1335 printf_filtered ("%s (%d)\t", name
, number
);
1336 printf_filtered ("%s\t", signal_stop
[number
] ? "Yes" : "No");
1337 printf_filtered ("%s\t", signal_print
[number
] ? "Yes" : "No");
1338 printf_filtered ("%s\t\t", signal_program
[number
] ? "Yes" : "No");
1339 printf_filtered ("%s\n", safe_strsignal (number
));
1342 /* Specify how various signals in the inferior should be handled. */
1345 handle_command (args
, from_tty
)
1350 int digits
, wordlen
;
1351 int sigfirst
, signum
, siglast
;
1354 unsigned char *sigs
;
1355 struct cleanup
*old_chain
;
1359 error_no_arg ("signal to handle");
1362 /* Allocate and zero an array of flags for which signals to handle. */
1364 nsigs
= signo_max () + 1;
1365 sigs
= (unsigned char *) alloca (nsigs
);
1366 memset (sigs
, 0, nsigs
);
1368 /* Break the command line up into args. */
1370 argv
= buildargv (args
);
1375 old_chain
= make_cleanup (freeargv
, (char *) argv
);
1377 /* Walk through the args, looking for signal numbers, signal names, and
1378 actions. Signal numbers and signal names may be interspersed with
1379 actions, with the actions being performed for all signals cumulatively
1380 specified. Signal ranges can be specified as <LOW>-<HIGH>. */
1382 while (*argv
!= NULL
)
1384 wordlen
= strlen (*argv
);
1385 for (digits
= 0; isdigit ((*argv
)[digits
]); digits
++) {;}
1387 sigfirst
= siglast
= -1;
1389 if (wordlen
>= 1 && !strncmp (*argv
, "all", wordlen
))
1391 /* Apply action to all signals except those used by the
1392 debugger. Silently skip those. */
1395 siglast
= nsigs
- 1;
1397 else if (wordlen
>= 1 && !strncmp (*argv
, "stop", wordlen
))
1399 SET_SIGS (nsigs
, sigs
, signal_stop
);
1400 SET_SIGS (nsigs
, sigs
, signal_print
);
1402 else if (wordlen
>= 1 && !strncmp (*argv
, "ignore", wordlen
))
1404 UNSET_SIGS (nsigs
, sigs
, signal_program
);
1406 else if (wordlen
>= 2 && !strncmp (*argv
, "print", wordlen
))
1408 SET_SIGS (nsigs
, sigs
, signal_print
);
1410 else if (wordlen
>= 2 && !strncmp (*argv
, "pass", wordlen
))
1412 SET_SIGS (nsigs
, sigs
, signal_program
);
1414 else if (wordlen
>= 3 && !strncmp (*argv
, "nostop", wordlen
))
1416 UNSET_SIGS (nsigs
, sigs
, signal_stop
);
1418 else if (wordlen
>= 3 && !strncmp (*argv
, "noignore", wordlen
))
1420 SET_SIGS (nsigs
, sigs
, signal_program
);
1422 else if (wordlen
>= 4 && !strncmp (*argv
, "noprint", wordlen
))
1424 UNSET_SIGS (nsigs
, sigs
, signal_print
);
1425 UNSET_SIGS (nsigs
, sigs
, signal_stop
);
1427 else if (wordlen
>= 4 && !strncmp (*argv
, "nopass", wordlen
))
1429 UNSET_SIGS (nsigs
, sigs
, signal_program
);
1431 else if (digits
> 0)
1433 sigfirst
= siglast
= atoi (*argv
);
1434 if ((*argv
)[digits
] == '-')
1436 siglast
= atoi ((*argv
) + digits
+ 1);
1438 if (sigfirst
> siglast
)
1440 /* Bet he didn't figure we'd think of this case... */
1445 if (sigfirst
< 0 || sigfirst
>= nsigs
)
1447 error ("Signal %d not in range 0-%d", sigfirst
, nsigs
- 1);
1449 if (siglast
< 0 || siglast
>= nsigs
)
1451 error ("Signal %d not in range 0-%d", siglast
, nsigs
- 1);
1454 else if ((signum
= strtosigno (*argv
)) != 0)
1456 sigfirst
= siglast
= signum
;
1460 /* Not a number and not a recognized flag word => complain. */
1461 error ("Unrecognized or ambiguous flag word: \"%s\".", *argv
);
1464 /* If any signal numbers or symbol names were found, set flags for
1465 which signals to apply actions to. */
1467 for (signum
= sigfirst
; signum
>= 0 && signum
<= siglast
; signum
++)
1473 if (!allsigs
&& !sigs
[signum
])
1475 if (query ("%s is used by the debugger.\nAre you sure you want to change it? ", strsigno (signum
)))
1481 printf ("Not confirmed, unchanged.\n");
1495 NOTICE_SIGNAL_HANDLING_CHANGE
;
1499 /* Show the results. */
1500 sig_print_header ();
1501 for (signum
= 0; signum
< nsigs
; signum
++)
1505 sig_print_info (signum
);
1510 do_cleanups (old_chain
);
1513 /* Print current contents of the tables set by the handle command. */
1516 signals_info (signum_exp
, from_tty
)
1521 sig_print_header ();
1525 /* First see if this is a symbol name. */
1526 i
= strtosigno (signum_exp
);
1529 /* Nope, maybe it's an address which evaluates to a signal
1531 i
= parse_and_eval_address (signum_exp
);
1532 if (i
>= NSIG
|| i
< 0)
1533 error ("Signal number out of bounds.");
1539 printf_filtered ("\n");
1540 for (i
= 0; i
< NSIG
; i
++)
1547 printf_filtered ("\nUse the \"handle\" command to change these tables.\n");
1550 /* Save all of the information associated with the inferior<==>gdb
1551 connection. INF_STATUS is a pointer to a "struct inferior_status"
1552 (defined in inferior.h). */
1555 save_inferior_status (inf_status
, restore_stack_info
)
1556 struct inferior_status
*inf_status
;
1557 int restore_stack_info
;
1559 inf_status
->pc_changed
= pc_changed
;
1560 inf_status
->stop_signal
= stop_signal
;
1561 inf_status
->stop_pc
= stop_pc
;
1562 inf_status
->stop_frame_address
= stop_frame_address
;
1563 inf_status
->stop_step
= stop_step
;
1564 inf_status
->stop_stack_dummy
= stop_stack_dummy
;
1565 inf_status
->stopped_by_random_signal
= stopped_by_random_signal
;
1566 inf_status
->trap_expected
= trap_expected
;
1567 inf_status
->step_range_start
= step_range_start
;
1568 inf_status
->step_range_end
= step_range_end
;
1569 inf_status
->step_frame_address
= step_frame_address
;
1570 inf_status
->step_over_calls
= step_over_calls
;
1571 inf_status
->step_resume_break_address
= step_resume_break_address
;
1572 inf_status
->stop_after_trap
= stop_after_trap
;
1573 inf_status
->stop_soon_quietly
= stop_soon_quietly
;
1574 /* Save original bpstat chain here; replace it with copy of chain.
1575 If caller's caller is walking the chain, they'll be happier if we
1576 hand them back the original chain when restore_i_s is called. */
1577 inf_status
->stop_bpstat
= stop_bpstat
;
1578 stop_bpstat
= bpstat_copy (stop_bpstat
);
1579 inf_status
->breakpoint_proceeded
= breakpoint_proceeded
;
1580 inf_status
->restore_stack_info
= restore_stack_info
;
1581 inf_status
->proceed_to_finish
= proceed_to_finish
;
1583 memcpy (inf_status
->stop_registers
, stop_registers
, REGISTER_BYTES
);
1585 record_selected_frame (&(inf_status
->selected_frame_address
),
1586 &(inf_status
->selected_level
));
1591 restore_inferior_status (inf_status
)
1592 struct inferior_status
*inf_status
;
1595 int level
= inf_status
->selected_level
;
1597 pc_changed
= inf_status
->pc_changed
;
1598 stop_signal
= inf_status
->stop_signal
;
1599 stop_pc
= inf_status
->stop_pc
;
1600 stop_frame_address
= inf_status
->stop_frame_address
;
1601 stop_step
= inf_status
->stop_step
;
1602 stop_stack_dummy
= inf_status
->stop_stack_dummy
;
1603 stopped_by_random_signal
= inf_status
->stopped_by_random_signal
;
1604 trap_expected
= inf_status
->trap_expected
;
1605 step_range_start
= inf_status
->step_range_start
;
1606 step_range_end
= inf_status
->step_range_end
;
1607 step_frame_address
= inf_status
->step_frame_address
;
1608 step_over_calls
= inf_status
->step_over_calls
;
1609 step_resume_break_address
= inf_status
->step_resume_break_address
;
1610 stop_after_trap
= inf_status
->stop_after_trap
;
1611 stop_soon_quietly
= inf_status
->stop_soon_quietly
;
1612 bpstat_clear (&stop_bpstat
);
1613 stop_bpstat
= inf_status
->stop_bpstat
;
1614 breakpoint_proceeded
= inf_status
->breakpoint_proceeded
;
1615 proceed_to_finish
= inf_status
->proceed_to_finish
;
1617 memcpy (stop_registers
, inf_status
->stop_registers
, REGISTER_BYTES
);
1619 /* The inferior can be gone if the user types "print exit(0)"
1620 (and perhaps other times). */
1621 if (target_has_stack
&& inf_status
->restore_stack_info
)
1623 fid
= find_relative_frame (get_current_frame (),
1626 /* If inf_status->selected_frame_address is NULL, there was no
1627 previously selected frame. */
1629 FRAME_FP (fid
) != inf_status
->selected_frame_address
||
1633 /* I'm not sure this error message is a good idea. I have
1634 only seen it occur after "Can't continue previously
1635 requested operation" (we get called from do_cleanups), in
1636 which case it just adds insult to injury (one confusing
1637 error message after another. Besides which, does the
1638 user really care if we can't restore the previously
1640 fprintf (stderr
, "Unable to restore previously selected frame.\n");
1642 select_frame (get_current_frame (), 0);
1646 select_frame (fid
, inf_status
->selected_level
);
1652 _initialize_infrun ()
1655 register int numsigs
;
1657 add_info ("signals", signals_info
,
1658 "What debugger does when program gets various signals.\n\
1659 Specify a signal number as argument to print info on that signal only.");
1660 add_info_alias ("handle", "signals", 0);
1662 add_com ("handle", class_run
, handle_command
,
1663 "Specify how to handle a signal.\n\
1664 Args are signal numbers and actions to apply to those signals.\n\
1665 Signal numbers may be numeric (ex. 11) or symbolic (ex. SIGSEGV).\n\
1666 Numeric ranges may be specified with the form LOW-HIGH (ex. 14-21).\n\
1667 The special arg \"all\" is recognized to mean all signals except those\n\
1668 used by the debugger, typically SIGTRAP and SIGINT.\n\
1669 Recognized actions include \"stop\", \"nostop\", \"print\", \"noprint\",\n\
1670 \"pass\", \"nopass\", \"ignore\", or \"noignore\".\n\
1671 Stop means reenter debugger if this signal happens (implies print).\n\
1672 Print means print a message if this signal happens.\n\
1673 Pass means let program see this signal; otherwise program doesn't know.\n\
1674 Ignore is a synonym for nopass and noignore is a synonym for pass.\n\
1675 Pass and Stop may be combined.");
1677 numsigs
= signo_max () + 1;
1678 signal_stop
= (unsigned char *)
1679 xmalloc (sizeof (signal_stop
[0]) * numsigs
);
1680 signal_print
= (unsigned char *)
1681 xmalloc (sizeof (signal_print
[0]) * numsigs
);
1682 signal_program
= (unsigned char *)
1683 xmalloc (sizeof (signal_program
[0]) * numsigs
);
1684 for (i
= 0; i
< numsigs
; i
++)
1687 signal_print
[i
] = 1;
1688 signal_program
[i
] = 1;
1691 /* Signals caused by debugger's own actions
1692 should not be given to the program afterwards. */
1693 signal_program
[SIGTRAP
] = 0;
1694 signal_program
[SIGINT
] = 0;
1696 /* Signals that are not errors should not normally enter the debugger. */
1698 signal_stop
[SIGALRM
] = 0;
1699 signal_print
[SIGALRM
] = 0;
1700 #endif /* SIGALRM */
1702 signal_stop
[SIGVTALRM
] = 0;
1703 signal_print
[SIGVTALRM
] = 0;
1704 #endif /* SIGVTALRM */
1706 signal_stop
[SIGPROF
] = 0;
1707 signal_print
[SIGPROF
] = 0;
1708 #endif /* SIGPROF */
1710 signal_stop
[SIGCHLD
] = 0;
1711 signal_print
[SIGCHLD
] = 0;
1712 #endif /* SIGCHLD */
1714 signal_stop
[SIGCLD
] = 0;
1715 signal_print
[SIGCLD
] = 0;
1718 signal_stop
[SIGIO
] = 0;
1719 signal_print
[SIGIO
] = 0;
1722 signal_stop
[SIGURG
] = 0;
1723 signal_print
[SIGURG
] = 0;