1 | /**************************************** |
---|
2 | * Computer Algebra System SINGULAR * |
---|
3 | ****************************************/ |
---|
4 | /* $Id: cntrlc.cc,v 1.13 1997-07-01 15:41:43 Singular Exp $ */ |
---|
5 | /* |
---|
6 | * ABSTRACT - interupt handling |
---|
7 | */ |
---|
8 | |
---|
9 | /* includes */ |
---|
10 | #include <stdio.h> |
---|
11 | #include <stddef.h> |
---|
12 | #include <stdlib.h> |
---|
13 | #include <signal.h> |
---|
14 | #include "mod2.h" |
---|
15 | #include "tok.h" |
---|
16 | #include "ipshell.h" |
---|
17 | #include "mmemory.h" |
---|
18 | #include "febase.h" |
---|
19 | #include "cntrlc.h" |
---|
20 | #include "version.h" |
---|
21 | #ifdef PAGE_TEST |
---|
22 | #include "page.h" |
---|
23 | #endif |
---|
24 | |
---|
25 | #ifdef unix |
---|
26 | #ifndef hpux |
---|
27 | #include <unistd.h> |
---|
28 | #include <sys/types.h> |
---|
29 | |
---|
30 | #ifdef TIME_WITH_SYS_TIME |
---|
31 | # include <time.h> |
---|
32 | # ifdef HAVE_SYS_TIME_H |
---|
33 | # include <sys/time.h> |
---|
34 | # endif |
---|
35 | #else |
---|
36 | # ifdef HAVE_SYS_TIME_H |
---|
37 | # include <sys/time.h> |
---|
38 | # else |
---|
39 | # include <time.h> |
---|
40 | # endif |
---|
41 | #endif |
---|
42 | #ifdef HAVE_SYS_TIMES_H |
---|
43 | #include <sys/times.h> |
---|
44 | #endif |
---|
45 | |
---|
46 | #define INTERACTIVE 0 |
---|
47 | #define STACK_TRACE 1 |
---|
48 | #ifndef __OPTIMIZE__ |
---|
49 | static void debug (int); |
---|
50 | static void debug_stop (char **); |
---|
51 | static void stack_trace (char **); |
---|
52 | static void stack_trace_sigchld (int); |
---|
53 | #endif |
---|
54 | #endif |
---|
55 | #endif |
---|
56 | |
---|
57 | /* data */ |
---|
58 | jmp_buf si_start_jmpbuf; |
---|
59 | int siRandomStart; |
---|
60 | short si_restart=0; |
---|
61 | BOOLEAN siCntrlc = FALSE; |
---|
62 | |
---|
63 | /*0 implementation*/ |
---|
64 | #ifndef MSDOS |
---|
65 | /* signals are not implemented in DJGCC */ |
---|
66 | #ifndef macintosh |
---|
67 | /* signals are not right implemented in macintosh */ |
---|
68 | typedef void (*s_hdl_typ)(int); |
---|
69 | void sigint_handler(int sig); |
---|
70 | #endif |
---|
71 | #endif |
---|
72 | |
---|
73 | #ifdef linux |
---|
74 | struct sigcontext_struct { |
---|
75 | unsigned short gs, __gsh; |
---|
76 | unsigned short fs, __fsh; |
---|
77 | unsigned short es, __esh; |
---|
78 | unsigned short ds, __dsh; |
---|
79 | unsigned long edi; |
---|
80 | unsigned long esi; |
---|
81 | unsigned long ebp; |
---|
82 | unsigned long esp; |
---|
83 | unsigned long ebx; |
---|
84 | unsigned long edx; |
---|
85 | unsigned long ecx; |
---|
86 | unsigned long eax; |
---|
87 | unsigned long trapno; |
---|
88 | unsigned long err; |
---|
89 | unsigned long eip; |
---|
90 | unsigned short cs, __csh; |
---|
91 | unsigned long eflags; |
---|
92 | unsigned long esp_at_signal; |
---|
93 | unsigned short ss, __ssh; |
---|
94 | unsigned long i387; |
---|
95 | unsigned long oldmask; |
---|
96 | unsigned long cr2; |
---|
97 | }; |
---|
98 | typedef struct sigcontext_struct sigcontext; |
---|
99 | |
---|
100 | /*2 |
---|
101 | * signal handler for run time errors, linux version |
---|
102 | */ |
---|
103 | void sigsegv_handler(int sig, sigcontext s) |
---|
104 | { |
---|
105 | fprintf(stderr,"Singular : signal %d (v: %d/%d):\n",sig,SINGULAR_VERSION,SINGULAR_VERSION_ID); |
---|
106 | if (sig!=SIGINT) |
---|
107 | { |
---|
108 | fprintf(stderr,"Segment fault/Bus error occurred at %x because of %x (r:%d)\n" |
---|
109 | "please inform the authors\n", |
---|
110 | (int)s.eip,(int)s.cr2,siRandomStart); |
---|
111 | } |
---|
112 | #ifdef __OPTIMIZE__ |
---|
113 | if(si_restart<3) |
---|
114 | { |
---|
115 | si_restart++; |
---|
116 | fprintf(stderr,"trying to restart...\n"); |
---|
117 | init_signals(); |
---|
118 | longjmp(si_start_jmpbuf,1); |
---|
119 | } |
---|
120 | #endif |
---|
121 | #ifdef HAVE_FEREAD |
---|
122 | fe_reset_input_mode(); |
---|
123 | #endif |
---|
124 | #ifndef __OPTIMIZE__ |
---|
125 | if (sig!=SIGINT) debug(INTERACTIVE); |
---|
126 | #endif |
---|
127 | exit(0); |
---|
128 | } |
---|
129 | |
---|
130 | #ifdef PAGE_TEST |
---|
131 | #ifdef PAGE_COUNT |
---|
132 | static int page_segv_count=0; |
---|
133 | #endif |
---|
134 | void sig11_handler(int sig, sigcontext s) |
---|
135 | { |
---|
136 | #ifdef PAGE_COUNT |
---|
137 | page_segv_count++; |
---|
138 | #endif |
---|
139 | long base =s.cr2&(~4095); |
---|
140 | int i=page_tab_ind-1; |
---|
141 | for(;i>=0;i--) |
---|
142 | { |
---|
143 | if (page_tab[i]==base) { use_tab[i]='X'; break; } |
---|
144 | } |
---|
145 | Page_AllowAccess((void *)base, 4096); |
---|
146 | signal(SIGSEGV,(SignalHandler)sig11_handler); |
---|
147 | } |
---|
148 | |
---|
149 | void sigalarm_handler(int sig, sigcontext s) |
---|
150 | { |
---|
151 | int i=page_tab_ind-1; |
---|
152 | #ifdef PAGE_COUNT |
---|
153 | write(2,use_tab,page_segv_count); |
---|
154 | page_segv_count=0; |
---|
155 | #else |
---|
156 | write(2,use_tab,page_tab_ind); |
---|
157 | #endif |
---|
158 | write(2,"<\n",2); |
---|
159 | for(;i>=0;i--) |
---|
160 | { |
---|
161 | Page_DenyAccess((void *)page_tab[i],4096); |
---|
162 | #ifndef PAGE_COUNT |
---|
163 | use_tab[i]=' '; |
---|
164 | #endif |
---|
165 | } |
---|
166 | struct itimerval t,o; |
---|
167 | memset(&t,0,sizeof(t)); |
---|
168 | t.it_value.tv_sec =(unsigned)0; |
---|
169 | t.it_value.tv_usec =(unsigned)200; |
---|
170 | o.it_value.tv_sec =(unsigned)0; |
---|
171 | o.it_value.tv_usec =(unsigned)200; |
---|
172 | setitimer(ITIMER_VIRTUAL,&t,&o); |
---|
173 | signal(SIGVTALRM,(SignalHandler)sigalarm_handler); |
---|
174 | } |
---|
175 | |
---|
176 | #endif |
---|
177 | |
---|
178 | /*2 |
---|
179 | * init signal handlers, linux version |
---|
180 | */ |
---|
181 | void init_signals() |
---|
182 | { |
---|
183 | /*4 signal handler: linux*/ |
---|
184 | #ifdef PAGE_TEST |
---|
185 | signal(SIGSEGV,(SignalHandler)sig11_handler); |
---|
186 | page_tab_ind=0; |
---|
187 | struct itimerval t,o; |
---|
188 | memset(&t,0,sizeof(t)); |
---|
189 | t.it_value.tv_sec =(unsigned)0; |
---|
190 | t.it_value.tv_usec =(unsigned)100; |
---|
191 | o.it_value.tv_sec =(unsigned)0; |
---|
192 | o.it_value.tv_usec =(unsigned)200; |
---|
193 | setitimer(ITIMER_VIRTUAL,&t,&o); |
---|
194 | signal(SIGVTALRM,(SignalHandler)sigalarm_handler); |
---|
195 | #else |
---|
196 | signal(SIGSEGV,(SignalHandler)sigsegv_handler); |
---|
197 | #endif |
---|
198 | signal(SIGFPE, (SignalHandler)sigsegv_handler); |
---|
199 | signal(SIGILL, (SignalHandler)sigsegv_handler); |
---|
200 | signal(SIGIOT, (SignalHandler)sigsegv_handler); |
---|
201 | signal(SIGINT ,sigint_handler); |
---|
202 | } |
---|
203 | |
---|
204 | #else |
---|
205 | #ifdef SPARC_SUNOS_4 |
---|
206 | /*2 |
---|
207 | * signal handler for run time errors, sparc sunos 4 version |
---|
208 | */ |
---|
209 | void sigsegv_handler(int sig, int code, struct sigcontext *scp, char *addr) |
---|
210 | { |
---|
211 | fprintf(stderr,"Singular : signal %d, code %d (v: %d/%d):\n", |
---|
212 | sig,code,SINGULAR_VERSION,SINGULAR_VERSION_ID); |
---|
213 | if ((sig!=SIGINT)&&(sig!=SIGABRT)) |
---|
214 | { |
---|
215 | fprintf(stderr,"Segment fault/Bus error occurred at %x (r:%d)\n" |
---|
216 | "please inform the authors\n", |
---|
217 | (int)addr,siRandomStart); |
---|
218 | } |
---|
219 | #ifdef HAVE_FEREAD |
---|
220 | fe_reset_input_mode(0,NULL); |
---|
221 | #endif |
---|
222 | #ifndef __OPTIMIZE__ |
---|
223 | if (sig!=SIGINT) debug(STACK_TRACE); |
---|
224 | #endif |
---|
225 | exit(0); |
---|
226 | } |
---|
227 | |
---|
228 | /*2 |
---|
229 | * init signal handlers, sparc sunos 4 version |
---|
230 | */ |
---|
231 | void init_signals() |
---|
232 | { |
---|
233 | /*4 signal handler:*/ |
---|
234 | signal(SIGSEGV,sigsegv_handler); |
---|
235 | signal(SIGBUS, sigsegv_handler); |
---|
236 | signal(SIGFPE, sigsegv_handler); |
---|
237 | signal(SIGILL, sigsegv_handler); |
---|
238 | signal(SIGIOT, sigsegv_handler); |
---|
239 | signal(SIGINT ,sigint_handler); |
---|
240 | } |
---|
241 | #else |
---|
242 | |
---|
243 | /*2 |
---|
244 | * signal handler for run time errors, general version |
---|
245 | */ |
---|
246 | #ifndef macintosh |
---|
247 | void sigsegv_handler(int sig) |
---|
248 | { |
---|
249 | fprintf(stderr,"Singular : signal %d (v: %d/%d):\n", |
---|
250 | sig,SINGULAR_VERSION,SINGULAR_VERSION_ID); |
---|
251 | if (sig!=SIGINT) |
---|
252 | { |
---|
253 | fprintf(stderr,"Segment fault/Bus error occurred (r:%d)\n" |
---|
254 | "please inform the authors\n", |
---|
255 | siRandomStart); |
---|
256 | } |
---|
257 | #ifdef HAVE_FEREAD |
---|
258 | #ifdef HAVE_ATEXIT |
---|
259 | fe_reset_input_mode(); |
---|
260 | #else |
---|
261 | fe_reset_input_mode(0,NULL); |
---|
262 | #endif |
---|
263 | #endif |
---|
264 | #ifdef unix |
---|
265 | #ifndef hpux |
---|
266 | #ifndef __OPTIMIZE__ |
---|
267 | #ifndef MSDOS |
---|
268 | if (sig!=SIGINT) debug(STACK_TRACE); |
---|
269 | #endif |
---|
270 | #endif |
---|
271 | #endif |
---|
272 | #endif |
---|
273 | exit(0); |
---|
274 | } |
---|
275 | #endif |
---|
276 | |
---|
277 | /*2 |
---|
278 | * init signal handlers, general version |
---|
279 | */ |
---|
280 | void init_signals() |
---|
281 | { |
---|
282 | #ifndef MSDOS |
---|
283 | /* signals are not implemented in DJGCC */ |
---|
284 | #ifndef macintosh |
---|
285 | /* signals are temporaliy removed for macs. */ |
---|
286 | /*4 signal handler:*/ |
---|
287 | signal(SIGSEGV,(void (*) (int))sigsegv_handler); |
---|
288 | #ifdef SIGBUS |
---|
289 | signal(SIGBUS, sigsegv_handler); |
---|
290 | #endif |
---|
291 | #ifdef SIGFPE |
---|
292 | signal(SIGFPE, sigsegv_handler); |
---|
293 | #endif |
---|
294 | #ifdef SIGILL |
---|
295 | signal(SIGILL, sigsegv_handler); |
---|
296 | #endif |
---|
297 | #ifdef SIGIOT |
---|
298 | signal(SIGIOT, sigsegv_handler); |
---|
299 | #endif |
---|
300 | #ifdef SIGXCPU |
---|
301 | signal(SIGXCPU, (void (*)(int))SIG_IGN); |
---|
302 | #endif |
---|
303 | signal(SIGINT ,sigint_handler); |
---|
304 | #endif |
---|
305 | #endif |
---|
306 | } |
---|
307 | #endif |
---|
308 | #endif |
---|
309 | |
---|
310 | #ifndef MSDOS |
---|
311 | #ifndef macintosh |
---|
312 | /*2 |
---|
313 | * signal handler for SIGINT |
---|
314 | */ |
---|
315 | void sigint_handler(int sig) |
---|
316 | { |
---|
317 | mflush(); |
---|
318 | loop |
---|
319 | { |
---|
320 | int cnt=0; |
---|
321 | fputs("\nabort command(a), continue(c) or quit Singular(q) ?",stderr);fflush(stderr); |
---|
322 | switch(fgetc(stdin)) |
---|
323 | { |
---|
324 | case 'q': |
---|
325 | m2_end(2); |
---|
326 | case 'r': |
---|
327 | longjmp(si_start_jmpbuf,1); |
---|
328 | case 'a': |
---|
329 | siCntrlc++; |
---|
330 | case 'c': |
---|
331 | fgetc(stdin); |
---|
332 | signal(SIGINT ,(s_hdl_typ)sigint_handler); |
---|
333 | return; |
---|
334 | //siCntrlc ++; |
---|
335 | //if (siCntrlc>2) signal(SIGINT,(s_hdl_typ) sigsegv_handler); |
---|
336 | //else signal(SIGINT,(s_hdl_typ) sigint_handler); |
---|
337 | } |
---|
338 | cnt++; |
---|
339 | if(cnt>5) m2_end(2); |
---|
340 | } |
---|
341 | } |
---|
342 | #endif |
---|
343 | #endif |
---|
344 | |
---|
345 | //#ifdef macintosh |
---|
346 | //#include <Types.h> |
---|
347 | //#include <Events.h> |
---|
348 | //#include <OSEvents.h> |
---|
349 | //#include <CursorCtl.h> |
---|
350 | // |
---|
351 | ///*3 |
---|
352 | //* macintosh only: |
---|
353 | //* side effect of ^C is to insert EOF at the end of the current |
---|
354 | //* input selection. We must drain input, reach this EOF, then clear it |
---|
355 | //*/ |
---|
356 | //static void flush_intr(void) |
---|
357 | //{ |
---|
358 | // int c; |
---|
359 | // |
---|
360 | // while ((c=getchar())!=EOF); |
---|
361 | // clearerr(stdin); |
---|
362 | //} |
---|
363 | // |
---|
364 | ///*3 |
---|
365 | //* macintosh only: |
---|
366 | //* spin beach ball in MPW, allows MPW-tool to go to the background |
---|
367 | //* so you can use the finder and interrupts |
---|
368 | //*/ |
---|
369 | //static void beachball(void) |
---|
370 | //{ |
---|
371 | // Show_Cursor(HIDDEN_CURSOR); |
---|
372 | // SpinCursor(10); |
---|
373 | //} |
---|
374 | //#endif |
---|
375 | |
---|
376 | #ifndef MSDOS |
---|
377 | // /*2 |
---|
378 | // * test for SIGINT, start an interpreter |
---|
379 | // */ |
---|
380 | // void test_int_std(leftv v) |
---|
381 | // { |
---|
382 | // #ifndef macintosh |
---|
383 | // //#ifdef macintosh |
---|
384 | // // beachball(); |
---|
385 | // //#endif |
---|
386 | // if (siCntrlc>1) |
---|
387 | // { |
---|
388 | // int saveecho = si_echo; |
---|
389 | // siCntrlc = FALSE; |
---|
390 | // signal(SIGINT ,sigint_handler); |
---|
391 | // //#ifdef macintosh |
---|
392 | // // flush_intr(); |
---|
393 | // //#endif |
---|
394 | // //si_echo = 2; |
---|
395 | // printf("\n//inside a computation, continue with `exit;`\n"); |
---|
396 | // iiPStart("STDIN","STDIN",NULL); |
---|
397 | // si_echo = saveecho; |
---|
398 | // } |
---|
399 | // #endif |
---|
400 | // } |
---|
401 | #endif |
---|
402 | |
---|
403 | #ifndef MSDOS |
---|
404 | //void test_int() |
---|
405 | //{ |
---|
406 | //#ifndef macintosh |
---|
407 | // if (siCntrlc!=0) |
---|
408 | // { |
---|
409 | // int saveecho = si_echo; |
---|
410 | // siCntrlc = FALSE; |
---|
411 | // signal(SIGINT ,sigint_handler); |
---|
412 | ////#ifdef macintosh |
---|
413 | //// flush_intr(); |
---|
414 | ////#endif |
---|
415 | // iiDebug(); |
---|
416 | // si_echo = saveecho; |
---|
417 | // } |
---|
418 | //#endif |
---|
419 | //} |
---|
420 | #endif |
---|
421 | |
---|
422 | #ifdef unix |
---|
423 | #ifndef hpux |
---|
424 | #ifndef __OPTIMIZE__ |
---|
425 | #ifndef MSDOS |
---|
426 | int si_stop_stack_trace_x; |
---|
427 | |
---|
428 | static void debug (int method) |
---|
429 | { |
---|
430 | int pid; |
---|
431 | char buf[16]; |
---|
432 | char *args[4] = { "gdb", "Singularg", NULL, NULL }; |
---|
433 | |
---|
434 | sprintf (buf, "%d", getpid ()); |
---|
435 | |
---|
436 | args[2] = buf; |
---|
437 | |
---|
438 | pid = fork (); |
---|
439 | if (pid == 0) |
---|
440 | { |
---|
441 | switch (method) |
---|
442 | { |
---|
443 | case INTERACTIVE: |
---|
444 | fprintf (stderr, "debug_stop\n"); |
---|
445 | debug_stop (args); |
---|
446 | break; |
---|
447 | case STACK_TRACE: |
---|
448 | fprintf (stderr, "stack_trace\n"); |
---|
449 | stack_trace (args); |
---|
450 | break; |
---|
451 | } |
---|
452 | } |
---|
453 | else if (pid == -1) |
---|
454 | { |
---|
455 | perror ("could not fork"); |
---|
456 | return; |
---|
457 | } |
---|
458 | |
---|
459 | si_stop_stack_trace_x = 1; |
---|
460 | while (si_stop_stack_trace_x) ; |
---|
461 | } |
---|
462 | |
---|
463 | static void debug_stop ( char **args) |
---|
464 | { |
---|
465 | execvp (args[0], args); |
---|
466 | perror ("exec failed"); |
---|
467 | _exit (0); |
---|
468 | } |
---|
469 | |
---|
470 | static int stack_trace_done; |
---|
471 | |
---|
472 | static void stack_trace (char **args) |
---|
473 | { |
---|
474 | int pid; |
---|
475 | int in_fd[2]; |
---|
476 | int out_fd[2]; |
---|
477 | fd_set fdset; |
---|
478 | fd_set readset; |
---|
479 | struct timeval tv; |
---|
480 | int sel, index, state; |
---|
481 | char buffer[256]; |
---|
482 | char c; |
---|
483 | |
---|
484 | stack_trace_done = 0; |
---|
485 | |
---|
486 | signal (SIGCHLD, stack_trace_sigchld); |
---|
487 | |
---|
488 | if ((pipe (in_fd) == -1) || (pipe (out_fd) == -1)) |
---|
489 | { |
---|
490 | perror ("could open pipe"); |
---|
491 | _exit (0); |
---|
492 | } |
---|
493 | |
---|
494 | pid = fork (); |
---|
495 | if (pid == 0) |
---|
496 | { |
---|
497 | close (0); dup2 (in_fd[0],0); /* set the stdin to the in pipe */ |
---|
498 | close (1); dup2 (out_fd[1],1); /* set the stdout to the out pipe */ |
---|
499 | close (2); dup2 (out_fd[1],2); /* set the stderr to the out pipe */ |
---|
500 | |
---|
501 | execvp (args[0], args); /* exec gdb */ |
---|
502 | perror ("exec failed"); |
---|
503 | _exit (0); |
---|
504 | } |
---|
505 | else if (pid == -1) |
---|
506 | { |
---|
507 | perror ("could not fork"); |
---|
508 | _exit (0); |
---|
509 | } |
---|
510 | |
---|
511 | FD_ZERO (&fdset); |
---|
512 | FD_SET (out_fd[0], &fdset); |
---|
513 | |
---|
514 | write (in_fd[1], "backtrace\n", 10); |
---|
515 | write (in_fd[1], "p si_stop_stack_trace_x = 0\n", 28); |
---|
516 | write (in_fd[1], "quit\n", 5); |
---|
517 | |
---|
518 | index = 0; |
---|
519 | state = 0; |
---|
520 | |
---|
521 | loop |
---|
522 | { |
---|
523 | readset = fdset; |
---|
524 | tv.tv_sec = 1; |
---|
525 | tv.tv_usec = 0; |
---|
526 | |
---|
527 | #ifdef hpux |
---|
528 | sel = select (FD_SETSIZE, (int *)readset.fds_bits, NULL, NULL, &tv); |
---|
529 | #else |
---|
530 | sel = select (FD_SETSIZE, &readset, NULL, NULL, &tv); |
---|
531 | #endif |
---|
532 | if (sel == -1) |
---|
533 | break; |
---|
534 | |
---|
535 | if ((sel > 0) && (FD_ISSET (out_fd[0], &readset))) |
---|
536 | { |
---|
537 | if (read (out_fd[0], &c, 1)) |
---|
538 | { |
---|
539 | switch (state) |
---|
540 | { |
---|
541 | case 0: |
---|
542 | if (c == '#') |
---|
543 | { |
---|
544 | state = 1; |
---|
545 | index = 0; |
---|
546 | buffer[index++] = c; |
---|
547 | } |
---|
548 | break; |
---|
549 | case 1: |
---|
550 | buffer[index++] = c; |
---|
551 | if ((c == '\n') || (c == '\r')) |
---|
552 | { |
---|
553 | buffer[index] = 0; |
---|
554 | fprintf (stderr, "%s", buffer); |
---|
555 | state = 0; |
---|
556 | index = 0; |
---|
557 | } |
---|
558 | break; |
---|
559 | default: |
---|
560 | break; |
---|
561 | } |
---|
562 | } |
---|
563 | } |
---|
564 | else if (stack_trace_done) |
---|
565 | break; |
---|
566 | } |
---|
567 | |
---|
568 | close (in_fd[0]); |
---|
569 | close (in_fd[1]); |
---|
570 | close (out_fd[0]); |
---|
571 | close (out_fd[1]); |
---|
572 | _exit (0); |
---|
573 | } |
---|
574 | |
---|
575 | static void stack_trace_sigchld (int signum) |
---|
576 | { |
---|
577 | stack_trace_done = 1; |
---|
578 | } |
---|
579 | |
---|
580 | #endif |
---|
581 | #endif |
---|
582 | #endif |
---|
583 | #endif |
---|