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2a24676e | 1 | /* |
8a90f3aa KB |
2 | * Copyright (c) 1983 The Regents of the University of California. |
3 | * All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms are permitted | |
6 | * provided that the above copyright notice and this paragraph are | |
7 | * duplicated in all such forms and that any documentation, | |
8 | * advertising materials, and other materials related to such | |
9 | * distribution and use acknowledge that the software was developed | |
10 | * by the University of California, Berkeley. The name of the | |
11 | * University may not be used to endorse or promote products derived | |
12 | * from this software without specific prior written permission. | |
13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
15 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
2a24676e | 16 | */ |
4298caf5 | 17 | |
2a24676e | 18 | #ifndef lint |
8a90f3aa KB |
19 | static char sccsid[] = "@(#)events.c 5.4 (Berkeley) %G%"; |
20 | #endif /* not lint */ | |
4298caf5 ML |
21 | |
22 | /* | |
23 | * Event/breakpoint managment. | |
24 | */ | |
25 | ||
26 | #include "defs.h" | |
27 | #include "events.h" | |
28 | #include "main.h" | |
29 | #include "symbols.h" | |
30 | #include "tree.h" | |
31 | #include "eval.h" | |
32 | #include "source.h" | |
33 | #include "mappings.h" | |
2fd0f574 | 34 | #include "runtime.h" |
4298caf5 ML |
35 | #include "process.h" |
36 | #include "machine.h" | |
37 | #include "lists.h" | |
38 | ||
39 | #ifndef public | |
34d5a416 | 40 | |
4298caf5 ML |
41 | typedef struct Event *Event; |
42 | typedef struct Breakpoint *Breakpoint; | |
43 | ||
4298caf5 ML |
44 | #include "symbols.h" |
45 | ||
4298caf5 ML |
46 | #define addevent(cond, cmdlist) event_alloc(false, cond, cmdlist) |
47 | #define event_once(cond, cmdlist) event_alloc(true, cond, cmdlist) | |
48 | ||
34d5a416 DS |
49 | /* |
50 | * When tracing variables we keep a copy of their most recent value | |
51 | * and compare it to the current one each time a breakpoint occurs. | |
52 | * MAXTRSIZE is the maximum size variable we allow. | |
53 | */ | |
54 | ||
55 | #define MAXTRSIZE 512 | |
56 | ||
4298caf5 ML |
57 | #endif |
58 | ||
34d5a416 DS |
59 | public boolean inst_tracing; |
60 | public boolean single_stepping; | |
61 | public boolean isstopped; | |
62 | ||
63 | public Symbol linesym; | |
64 | public Symbol procsym; | |
65 | public Symbol pcsym; | |
66 | public Symbol retaddrsym; | |
67 | ||
4298caf5 ML |
68 | struct Event { |
69 | unsigned int id; | |
0022c355 | 70 | boolean temporary; |
4298caf5 ML |
71 | Node condition; |
72 | Cmdlist actions; | |
73 | }; | |
74 | ||
75 | struct Breakpoint { | |
76 | Event event; | |
77 | Address bpaddr; | |
78 | Lineno bpline; | |
79 | Cmdlist actions; | |
0022c355 | 80 | boolean temporary; |
4298caf5 ML |
81 | }; |
82 | ||
83 | typedef List Eventlist; | |
84 | typedef List Bplist; | |
85 | ||
86 | #define eventlist_append(event, el) list_append(list_item(event), nil, el) | |
87 | #define bplist_append(bp, bl) list_append(list_item(bp), nil, bl) | |
88 | ||
89 | private Eventlist eventlist; /* list of active events */ | |
90 | private Bplist bplist; /* list of active breakpoints */ | |
0022c355 ML |
91 | private Event curevent; /* most recently created event */ |
92 | private integer eventid; /* id number of current event */ | |
93 | private integer trid; /* id number of current trace */ | |
4298caf5 ML |
94 | |
95 | typedef struct Trcmd { | |
96 | Integer trid; | |
97 | Event event; | |
98 | Cmdlist cmdlist; | |
99 | } *Trcmd; | |
100 | ||
101 | private List eachline; /* commands to execute after each line */ | |
102 | private List eachinst; /* commands to execute after each instruction */ | |
103 | ||
104 | private Breakpoint bp_alloc(); | |
105 | ||
106 | /* | |
107 | * Initialize breakpoint information. | |
108 | */ | |
109 | ||
110 | private Symbol builtinsym(str, class, type) | |
111 | String str; | |
112 | Symclass class; | |
113 | Symbol type; | |
114 | { | |
115 | Symbol s; | |
116 | ||
117 | s = insert(identname(str, true)); | |
118 | s->language = findlanguage(".s"); | |
119 | s->class = class; | |
120 | s->type = type; | |
121 | return s; | |
122 | } | |
123 | ||
124 | public bpinit() | |
125 | { | |
126 | linesym = builtinsym("$line", VAR, t_int); | |
127 | procsym = builtinsym("$proc", PROC, nil); | |
128 | pcsym = lookup(identname("$pc", true)); | |
129 | if (pcsym == nil) { | |
130 | panic("can't find $pc"); | |
131 | } | |
132 | retaddrsym = builtinsym("$retaddr", VAR, t_int); | |
133 | eventlist = list_alloc(); | |
134 | bplist = list_alloc(); | |
135 | eachline = list_alloc(); | |
136 | eachinst = list_alloc(); | |
137 | } | |
138 | ||
139 | /* | |
140 | * Trap an event and do the associated commands when it occurs. | |
141 | */ | |
142 | ||
143 | public Event event_alloc(istmp, econd, cmdlist) | |
0022c355 | 144 | boolean istmp; |
4298caf5 ML |
145 | Node econd; |
146 | Cmdlist cmdlist; | |
147 | { | |
148 | register Event e; | |
149 | ||
150 | e = new(Event); | |
0022c355 ML |
151 | ++eventid; |
152 | e->id = eventid; | |
4298caf5 ML |
153 | e->temporary = istmp; |
154 | e->condition = econd; | |
155 | e->actions = cmdlist; | |
156 | eventlist_append(e, eventlist); | |
0022c355 | 157 | curevent = e; |
4298caf5 ML |
158 | translate(e); |
159 | return e; | |
160 | } | |
161 | ||
162 | /* | |
163 | * Delete the event with the given id. | |
2fd0f574 | 164 | * Returns whether it's successful or not. |
4298caf5 ML |
165 | */ |
166 | ||
2fd0f574 | 167 | public boolean delevent (id) |
4298caf5 ML |
168 | unsigned int id; |
169 | { | |
170 | Event e; | |
171 | Breakpoint bp; | |
172 | Trcmd t; | |
2fd0f574 | 173 | boolean found; |
4298caf5 | 174 | |
2fd0f574 | 175 | found = false; |
4298caf5 ML |
176 | foreach (Event, e, eventlist) |
177 | if (e->id == id) { | |
2fd0f574 | 178 | found = true; |
4298caf5 ML |
179 | foreach (Breakpoint, bp, bplist) |
180 | if (bp->event == e) { | |
0022c355 ML |
181 | if (tracebpts) { |
182 | printf("deleting breakpoint at 0x%x\n", bp->bpaddr); | |
183 | fflush(stdout); | |
184 | } | |
4298caf5 ML |
185 | list_delete(list_curitem(bplist), bplist); |
186 | } | |
187 | endfor | |
2fd0f574 | 188 | list_delete(list_curitem(eventlist), eventlist); |
4298caf5 ML |
189 | break; |
190 | } | |
191 | endfor | |
192 | foreach (Trcmd, t, eachline) | |
193 | if (t->event->id == id) { | |
2fd0f574 | 194 | found = true; |
4298caf5 ML |
195 | printrmtr(t); |
196 | list_delete(list_curitem(eachline), eachline); | |
197 | } | |
198 | endfor | |
199 | foreach (Trcmd, t, eachinst) | |
200 | if (t->event->id == id) { | |
2fd0f574 | 201 | found = true; |
4298caf5 ML |
202 | printrmtr(t); |
203 | list_delete(list_curitem(eachinst), eachinst); | |
204 | } | |
205 | endfor | |
206 | if (list_size(eachinst) == 0) { | |
207 | inst_tracing = false; | |
208 | if (list_size(eachline) == 0) { | |
209 | single_stepping = false; | |
210 | } | |
211 | } | |
2fd0f574 | 212 | return found; |
4298caf5 ML |
213 | } |
214 | ||
215 | /* | |
216 | * Translate an event into the appropriate breakpoints and actions. | |
217 | * While we're at it, turn on the breakpoints if the condition is true. | |
218 | */ | |
219 | ||
220 | private translate(e) | |
221 | Event e; | |
222 | { | |
223 | Breakpoint bp; | |
224 | Symbol s; | |
225 | Node place; | |
226 | Lineno line; | |
227 | Address addr; | |
228 | ||
229 | checkref(e->condition); | |
230 | switch (e->condition->op) { | |
231 | case O_EQ: | |
232 | if (e->condition->value.arg[0]->op == O_SYM) { | |
233 | s = e->condition->value.arg[0]->value.sym; | |
234 | place = e->condition->value.arg[1]; | |
235 | if (s == linesym) { | |
236 | if (place->op == O_QLINE) { | |
237 | line = place->value.arg[1]->value.lcon; | |
2fd0f574 | 238 | addr = objaddr(line, place->value.arg[0]->value.scon); |
4298caf5 ML |
239 | } else { |
240 | eval(place); | |
241 | line = pop(long); | |
242 | addr = objaddr(line, cursource); | |
243 | } | |
244 | if (addr == NOADDR) { | |
2fd0f574 SL |
245 | if (not delevent(e->id)) { |
246 | printf("!! dbx.translate: can't undo event %d?\n", | |
247 | e->id); | |
248 | } | |
4298caf5 ML |
249 | beginerrmsg(); |
250 | fprintf(stderr, "no executable code at line "); | |
251 | prtree(stderr, place); | |
252 | enderrmsg(); | |
253 | } | |
254 | bp = bp_alloc(e, addr, line, e->actions); | |
255 | } else if (s == procsym) { | |
256 | eval(place); | |
257 | s = pop(Symbol); | |
258 | bp = bp_alloc(e, codeloc(s), 0, e->actions); | |
259 | if (isactive(s) and pc != codeloc(program)) { | |
260 | evalcmdlist(e->actions); | |
261 | } | |
262 | } else if (s == pcsym) { | |
263 | eval(place); | |
264 | bp = bp_alloc(e, pop(Address), 0, e->actions); | |
265 | } else { | |
266 | condbp(e); | |
267 | } | |
268 | } else { | |
269 | condbp(e); | |
270 | } | |
271 | break; | |
272 | ||
273 | /* | |
274 | * These should be handled specially. | |
275 | * But for now I'm ignoring the problem. | |
276 | */ | |
277 | case O_AND: | |
278 | case O_OR: | |
279 | default: | |
280 | condbp(e); | |
281 | break; | |
282 | } | |
283 | } | |
284 | ||
285 | /* | |
286 | * Create a breakpoint for a condition that cannot be pinpointed | |
287 | * to happening at a particular address, but one for which we | |
288 | * must single step and check the condition after each statement. | |
289 | */ | |
290 | ||
291 | private condbp(e) | |
292 | Event e; | |
293 | { | |
294 | Symbol p; | |
295 | Breakpoint bp; | |
296 | Cmdlist actions; | |
297 | ||
298 | p = tcontainer(e->condition); | |
299 | if (p == nil) { | |
300 | p = program; | |
301 | } | |
302 | actions = buildcmdlist(build(O_IF, e->condition, e->actions)); | |
303 | actions = buildcmdlist(build(O_TRACEON, false, actions)); | |
304 | bp = bp_alloc(e, codeloc(p), 0, actions); | |
305 | } | |
306 | ||
307 | /* | |
308 | * Determine the deepest nested subprogram that still contains | |
309 | * all elements in the given expression. | |
310 | */ | |
311 | ||
312 | public Symbol tcontainer(exp) | |
313 | Node exp; | |
314 | { | |
315 | Integer i; | |
316 | Symbol s, t, u, v; | |
317 | ||
318 | checkref(exp); | |
319 | s = nil; | |
320 | if (exp->op == O_SYM) { | |
321 | s = container(exp->value.sym); | |
322 | } else if (not isleaf(exp->op)) { | |
323 | for (i = 0; i < nargs(exp->op); i++) { | |
324 | t = tcontainer(exp->value.arg[i]); | |
325 | if (t != nil) { | |
326 | if (s == nil) { | |
327 | s = t; | |
328 | } else { | |
329 | u = s; | |
330 | v = t; | |
331 | while (u != v and u != nil) { | |
332 | u = container(u); | |
333 | v = container(v); | |
334 | } | |
335 | if (u == nil) { | |
336 | panic("bad ancestry for \"%s\"", symname(s)); | |
337 | } else { | |
338 | s = u; | |
339 | } | |
340 | } | |
341 | } | |
342 | } | |
343 | } | |
344 | return s; | |
345 | } | |
346 | ||
e1bc702e ML |
347 | /* |
348 | * Determine if the given function can be executed at full speed. | |
349 | * This can only be done if there are no breakpoints within the function. | |
350 | */ | |
351 | ||
0022c355 | 352 | public boolean canskip(f) |
e1bc702e ML |
353 | Symbol f; |
354 | { | |
355 | Breakpoint p; | |
0022c355 | 356 | boolean ok; |
e1bc702e ML |
357 | |
358 | ok = true; | |
359 | foreach (Breakpoint, p, bplist) | |
360 | if (whatblock(p->bpaddr) == f) { | |
361 | ok = false; | |
362 | break; | |
363 | } | |
364 | endfor | |
365 | return ok; | |
366 | } | |
367 | ||
4298caf5 ML |
368 | /* |
369 | * Print out what's currently being traced by looking at | |
370 | * the currently active events. | |
371 | * | |
372 | * Some convolution here to translate internal representation | |
373 | * of events back into something more palatable. | |
374 | */ | |
375 | ||
376 | public status() | |
377 | { | |
378 | Event e; | |
4298caf5 ML |
379 | |
380 | foreach (Event, e, eventlist) | |
381 | if (not e->temporary) { | |
e1bc702e | 382 | printevent(e); |
4298caf5 ML |
383 | } |
384 | endfor | |
385 | } | |
386 | ||
e1bc702e ML |
387 | public printevent(e) |
388 | Event e; | |
389 | { | |
390 | Command cmd; | |
391 | ||
392 | if (not isredirected()) { | |
2fd0f574 | 393 | printeventid(e->id); |
e1bc702e ML |
394 | } |
395 | cmd = list_element(Command, list_head(e->actions)); | |
396 | if (cmd->op == O_PRINTCALL) { | |
397 | printf("trace "); | |
398 | printname(stdout, cmd->value.sym); | |
399 | } else { | |
400 | if (list_size(e->actions) > 1) { | |
401 | printf("{ "); | |
402 | } | |
403 | foreach (Command, cmd, e->actions) | |
404 | printcmd(stdout, cmd); | |
405 | if (not list_islast()) { | |
406 | printf("; "); | |
407 | } | |
408 | endfor | |
409 | if (list_size(e->actions) > 1) { | |
410 | printf(" }"); | |
411 | } | |
412 | printcond(e->condition); | |
413 | } | |
414 | printf("\n"); | |
415 | } | |
416 | ||
2fd0f574 SL |
417 | private printeventid (id) |
418 | integer id; | |
419 | { | |
420 | printf("[%d] ", id); | |
421 | } | |
422 | ||
4298caf5 ML |
423 | /* |
424 | * Print out a condition. | |
425 | */ | |
426 | ||
427 | private printcond(cond) | |
428 | Node cond; | |
429 | { | |
430 | Symbol s; | |
431 | Node place; | |
432 | ||
433 | if (cond->op == O_EQ and cond->value.arg[0]->op == O_SYM) { | |
434 | s = cond->value.arg[0]->value.sym; | |
435 | place = cond->value.arg[1]; | |
436 | if (s == procsym) { | |
437 | if (place->value.sym != program) { | |
438 | printf(" in "); | |
439 | printname(stdout, place->value.sym); | |
440 | } | |
441 | } else if (s == linesym) { | |
442 | printf(" at "); | |
443 | prtree(stdout, place); | |
444 | } else if (s == pcsym or s == retaddrsym) { | |
445 | printf("i at "); | |
446 | prtree(stdout, place); | |
447 | } else { | |
448 | printf(" when "); | |
449 | prtree(stdout, cond); | |
450 | } | |
451 | } else { | |
452 | printf(" when "); | |
453 | prtree(stdout, cond); | |
454 | } | |
455 | } | |
456 | ||
457 | /* | |
458 | * Add a breakpoint to the list and return it. | |
459 | */ | |
460 | ||
461 | private Breakpoint bp_alloc(e, addr, line, actions) | |
462 | Event e; | |
463 | Address addr; | |
464 | Lineno line; | |
465 | Cmdlist actions; | |
466 | { | |
467 | register Breakpoint p; | |
468 | ||
469 | p = new(Breakpoint); | |
470 | p->event = e; | |
471 | p->bpaddr = addr; | |
472 | p->bpline = line; | |
473 | p->actions = actions; | |
0022c355 ML |
474 | p->temporary = false; |
475 | if (tracebpts) { | |
476 | if (e == nil) { | |
b9ae3d87 | 477 | printf("new bp at 0x%x for event ??\n", addr); |
0022c355 ML |
478 | } else { |
479 | printf("new bp at 0x%x for event %d\n", addr, e->id); | |
480 | } | |
481 | fflush(stdout); | |
482 | } | |
4298caf5 ML |
483 | bplist_append(p, bplist); |
484 | return p; | |
485 | } | |
486 | ||
487 | /* | |
488 | * Free all storage in the event and breakpoint tables. | |
489 | */ | |
490 | ||
491 | public bpfree() | |
492 | { | |
493 | register Event e; | |
494 | ||
495 | fixbps(); | |
496 | foreach (Event, e, eventlist) | |
2fd0f574 SL |
497 | if (not delevent(e->id)) { |
498 | printf("!! dbx.bpfree: can't delete event %d\n", e->id); | |
499 | } | |
4298caf5 ML |
500 | list_delete(list_curitem(eventlist), eventlist); |
501 | endfor | |
502 | } | |
503 | ||
504 | /* | |
505 | * Determine if the program stopped at a known breakpoint | |
506 | * and if so do the associated commands. | |
507 | */ | |
508 | ||
0022c355 | 509 | public boolean bpact() |
4298caf5 ML |
510 | { |
511 | register Breakpoint p; | |
0022c355 | 512 | boolean found; |
2fd0f574 | 513 | integer eventId; |
4298caf5 ML |
514 | |
515 | found = false; | |
516 | foreach (Breakpoint, p, bplist) | |
517 | if (p->bpaddr == pc) { | |
0022c355 ML |
518 | if (tracebpts) { |
519 | printf("breakpoint for event %d found at location 0x%x\n", | |
520 | p->event->id, pc); | |
521 | } | |
4298caf5 | 522 | found = true; |
0022c355 ML |
523 | if (p->event->temporary) { |
524 | if (not delevent(p->event->id)) { | |
525 | printf("!! dbx.bpact: can't find event %d\n", | |
526 | p->event->id); | |
527 | } | |
528 | } | |
4298caf5 | 529 | evalcmdlist(p->actions); |
0022c355 ML |
530 | if (isstopped) { |
531 | eventId = p->event->id; | |
532 | } | |
533 | if (p->temporary) { | |
534 | list_delete(list_curitem(bplist), bplist); | |
535 | } | |
4298caf5 ML |
536 | } |
537 | endfor | |
538 | if (isstopped) { | |
2fd0f574 SL |
539 | if (found) { |
540 | printeventid(eventId); | |
541 | } | |
4298caf5 ML |
542 | printstatus(); |
543 | } | |
544 | fflush(stdout); | |
545 | return found; | |
546 | } | |
547 | ||
548 | /* | |
549 | * Begin single stepping and executing the given commands after each step. | |
550 | * If the first argument is true step by instructions, otherwise | |
551 | * step by source lines. | |
552 | * | |
553 | * We automatically set a breakpoint at the end of the current procedure | |
554 | * to turn off the given tracing. | |
555 | */ | |
556 | ||
557 | public traceon(inst, event, cmdlist) | |
0022c355 | 558 | boolean inst; |
4298caf5 ML |
559 | Event event; |
560 | Cmdlist cmdlist; | |
561 | { | |
562 | register Trcmd trcmd; | |
0022c355 | 563 | Breakpoint bp; |
4298caf5 | 564 | Cmdlist actions; |
e1bc702e | 565 | Address ret; |
0022c355 | 566 | Event e; |
4298caf5 | 567 | |
0022c355 ML |
568 | if (event == nil) { |
569 | e = curevent; | |
570 | } else { | |
571 | e = event; | |
572 | } | |
4298caf5 | 573 | trcmd = new(Trcmd); |
0022c355 ML |
574 | ++trid; |
575 | trcmd->trid = trid; | |
576 | trcmd->event = e; | |
4298caf5 ML |
577 | trcmd->cmdlist = cmdlist; |
578 | single_stepping = true; | |
579 | if (inst) { | |
580 | inst_tracing = true; | |
581 | list_append(list_item(trcmd), nil, eachinst); | |
582 | } else { | |
583 | list_append(list_item(trcmd), nil, eachline); | |
584 | } | |
e1bc702e ML |
585 | ret = return_addr(); |
586 | if (ret != 0) { | |
0022c355 ML |
587 | actions = buildcmdlist(build(O_TRACEOFF, trcmd->trid)); |
588 | bp = bp_alloc(e, (Address) ret, 0, actions); | |
589 | bp->temporary = true; | |
590 | } | |
591 | if (tracebpts) { | |
592 | printf("adding trace %d for event %d\n", trcmd->trid, e->id); | |
4298caf5 ML |
593 | } |
594 | } | |
595 | ||
596 | /* | |
597 | * Turn off some kind of tracing. | |
598 | * Strictly an internal command, this cannot be invoked by the user. | |
599 | */ | |
600 | ||
601 | public traceoff(id) | |
602 | Integer id; | |
603 | { | |
604 | register Trcmd t; | |
0022c355 | 605 | register boolean found; |
4298caf5 ML |
606 | |
607 | found = false; | |
608 | foreach (Trcmd, t, eachline) | |
609 | if (t->trid == id) { | |
610 | printrmtr(t); | |
611 | list_delete(list_curitem(eachline), eachline); | |
612 | found = true; | |
613 | break; | |
614 | } | |
615 | endfor | |
616 | if (not found) { | |
617 | foreach (Trcmd, t, eachinst) | |
618 | if (t->event->id == id) { | |
619 | printrmtr(t); | |
620 | list_delete(list_curitem(eachinst), eachinst); | |
621 | found = true; | |
622 | break; | |
623 | } | |
624 | endfor | |
625 | if (not found) { | |
0022c355 ML |
626 | beginerrmsg(); |
627 | fprintf(stderr, "[internal error: trace id %d not found]\n", id); | |
4298caf5 ML |
628 | } |
629 | } | |
630 | if (list_size(eachinst) == 0) { | |
631 | inst_tracing = false; | |
632 | if (list_size(eachline) == 0) { | |
633 | single_stepping = false; | |
634 | } | |
635 | } | |
636 | } | |
637 | ||
638 | /* | |
639 | * If breakpoints are being traced, note that a Trcmd is being deleted. | |
640 | */ | |
641 | ||
642 | private printrmtr(t) | |
643 | Trcmd t; | |
644 | { | |
0022c355 ML |
645 | if (tracebpts) { |
646 | printf("removing trace %d", t->trid); | |
647 | if (t->event != nil) { | |
648 | printf(" for event %d", t->event->id); | |
649 | } | |
650 | printf("\n"); | |
252b7653 | 651 | } |
4298caf5 ML |
652 | } |
653 | ||
654 | /* | |
655 | * Print out news during single step tracing. | |
656 | */ | |
657 | ||
658 | public printnews() | |
659 | { | |
660 | register Trcmd t; | |
661 | ||
662 | foreach (Trcmd, t, eachline) | |
663 | evalcmdlist(t->cmdlist); | |
664 | endfor | |
665 | foreach (Trcmd, t, eachinst) | |
666 | evalcmdlist(t->cmdlist); | |
667 | endfor | |
668 | bpact(); | |
669 | } | |
670 | ||
671 | /* | |
672 | * A procedure call/return has occurred while single-stepping, | |
673 | * note it if we're tracing lines. | |
674 | */ | |
675 | ||
0022c355 | 676 | private boolean chklist(); |
4298caf5 ML |
677 | |
678 | public callnews(iscall) | |
0022c355 | 679 | boolean iscall; |
4298caf5 ML |
680 | { |
681 | if (not chklist(eachline, iscall)) { | |
682 | chklist(eachinst, iscall); | |
683 | } | |
684 | } | |
685 | ||
0022c355 | 686 | private boolean chklist(list, iscall) |
4298caf5 | 687 | List list; |
0022c355 | 688 | boolean iscall; |
4298caf5 ML |
689 | { |
690 | register Trcmd t; | |
691 | register Command cmd; | |
692 | ||
2fd0f574 | 693 | setcurfunc(whatblock(pc)); |
4298caf5 ML |
694 | foreach (Trcmd, t, list) |
695 | foreach (Command, cmd, t->cmdlist) | |
696 | if (cmd->op == O_PRINTSRCPOS and | |
697 | (cmd->value.arg[0] == nil or cmd->value.arg[0]->op == O_QLINE)) { | |
4298caf5 ML |
698 | if (iscall) { |
699 | printentry(curfunc); | |
700 | } else { | |
701 | printexit(curfunc); | |
702 | } | |
703 | return true; | |
704 | } | |
705 | endfor | |
706 | endfor | |
707 | return false; | |
708 | } | |
709 | ||
4298caf5 ML |
710 | /* |
711 | * List of variables being watched. | |
712 | */ | |
713 | ||
714 | typedef struct Trinfo *Trinfo; | |
715 | ||
716 | struct Trinfo { | |
717 | Node variable; | |
718 | Address traddr; | |
719 | Symbol trblock; | |
720 | char *trvalue; | |
721 | }; | |
722 | ||
723 | private List trinfolist; | |
724 | ||
725 | /* | |
726 | * Find the trace information record associated with the given record. | |
727 | * If there isn't one then create it and add it to the list. | |
728 | */ | |
729 | ||
730 | private Trinfo findtrinfo(p) | |
731 | Node p; | |
732 | { | |
733 | register Trinfo tp; | |
0022c355 | 734 | boolean isnew; |
4298caf5 ML |
735 | |
736 | isnew = true; | |
737 | if (trinfolist == nil) { | |
738 | trinfolist = list_alloc(); | |
739 | } else { | |
740 | foreach (Trinfo, tp, trinfolist) | |
741 | if (tp->variable == p) { | |
742 | isnew = false; | |
743 | break; | |
744 | } | |
745 | endfor | |
746 | } | |
747 | if (isnew) { | |
748 | if (tracebpts) { | |
749 | printf("adding trinfo for \""); | |
750 | prtree(stdout, p); | |
751 | printf("\"\n"); | |
752 | } | |
753 | tp = new(Trinfo); | |
754 | tp->variable = p; | |
755 | tp->traddr = lval(p); | |
756 | tp->trvalue = nil; | |
757 | list_append(list_item(tp), nil, trinfolist); | |
758 | } | |
759 | return tp; | |
760 | } | |
761 | ||
762 | /* | |
763 | * Print out the value of a variable if it has changed since the | |
764 | * last time we checked. | |
765 | */ | |
766 | ||
767 | public printifchanged(p) | |
768 | Node p; | |
769 | { | |
770 | register Trinfo tp; | |
771 | register int n; | |
772 | char buff[MAXTRSIZE]; | |
0022c355 | 773 | Filename curfile; |
4298caf5 | 774 | static Lineno prevline; |
0022c355 | 775 | static Filename prevfile; |
4298caf5 ML |
776 | |
777 | tp = findtrinfo(p); | |
778 | n = size(p->nodetype); | |
0022c355 ML |
779 | dread(buff, tp->traddr, n); |
780 | curfile = srcfilename(pc); | |
4298caf5 ML |
781 | if (tp->trvalue == nil) { |
782 | tp->trvalue = newarr(char, n); | |
783 | mov(buff, tp->trvalue, n); | |
784 | mov(buff, sp, n); | |
785 | sp += n; | |
0022c355 | 786 | printf("initially (at line %d in \"%s\"):\t", curline, curfile); |
4298caf5 ML |
787 | prtree(stdout, p); |
788 | printf(" = "); | |
789 | printval(p->nodetype); | |
790 | putchar('\n'); | |
791 | } else if (cmp(tp->trvalue, buff, n) != 0) { | |
792 | mov(buff, tp->trvalue, n); | |
793 | mov(buff, sp, n); | |
794 | sp += n; | |
0022c355 | 795 | printf("after line %d in \"%s\":\t", prevline, prevfile); |
4298caf5 ML |
796 | prtree(stdout, p); |
797 | printf(" = "); | |
798 | printval(p->nodetype); | |
799 | putchar('\n'); | |
800 | } | |
801 | prevline = curline; | |
0022c355 | 802 | prevfile = curfile; |
4298caf5 ML |
803 | } |
804 | ||
805 | /* | |
806 | * Stop if the value of the given expression has changed. | |
807 | */ | |
808 | ||
809 | public stopifchanged(p) | |
810 | Node p; | |
811 | { | |
812 | register Trinfo tp; | |
813 | register int n; | |
814 | char buff[MAXTRSIZE]; | |
815 | static Lineno prevline; | |
816 | ||
817 | tp = findtrinfo(p); | |
818 | n = size(p->nodetype); | |
819 | dread(buff, tp->traddr, n); | |
820 | if (tp->trvalue == nil) { | |
821 | tp->trvalue = newarr(char, n); | |
822 | mov(buff, tp->trvalue, n); | |
823 | isstopped = true; | |
824 | } else if (cmp(tp->trvalue, buff, n) != 0) { | |
825 | mov(buff, tp->trvalue, n); | |
2fd0f574 SL |
826 | mov(buff, sp, n); |
827 | sp += n; | |
828 | printf("after line %d:\t", prevline); | |
829 | prtree(stdout, p); | |
830 | printf(" = "); | |
831 | printval(p->nodetype); | |
832 | putchar('\n'); | |
4298caf5 ML |
833 | isstopped = true; |
834 | } | |
835 | prevline = curline; | |
836 | } | |
837 | ||
838 | /* | |
839 | * Free the tracing table. | |
840 | */ | |
841 | ||
842 | public trfree() | |
843 | { | |
844 | register Trinfo tp; | |
845 | ||
846 | foreach (Trinfo, tp, trinfolist) | |
847 | dispose(tp->trvalue); | |
848 | dispose(tp); | |
849 | list_delete(list_curitem(trinfolist), trinfolist); | |
850 | endfor | |
851 | } | |
852 | ||
853 | /* | |
854 | * Fix up breakpoint information before continuing execution. | |
855 | * | |
856 | * It's necessary to destroy events and breakpoints that were created | |
857 | * temporarily and still exist because the program terminated abnormally. | |
858 | */ | |
859 | ||
860 | public fixbps() | |
861 | { | |
862 | register Event e; | |
863 | register Trcmd t; | |
864 | ||
865 | single_stepping = false; | |
866 | inst_tracing = false; | |
867 | trfree(); | |
868 | foreach (Event, e, eventlist) | |
869 | if (e->temporary) { | |
2fd0f574 SL |
870 | if (not delevent(e->id)) { |
871 | printf("!! dbx.fixbps: can't find event %d\n", e->id); | |
872 | } | |
4298caf5 ML |
873 | } |
874 | endfor | |
875 | foreach (Trcmd, t, eachline) | |
876 | printrmtr(t); | |
877 | list_delete(list_curitem(eachline), eachline); | |
878 | endfor | |
879 | foreach (Trcmd, t, eachinst) | |
880 | printrmtr(t); | |
881 | list_delete(list_curitem(eachinst), eachinst); | |
882 | endfor | |
883 | } | |
884 | ||
885 | /* | |
886 | * Set all breakpoints in object code. | |
887 | */ | |
888 | ||
889 | public setallbps() | |
890 | { | |
891 | register Breakpoint p; | |
892 | ||
893 | foreach (Breakpoint, p, bplist) | |
894 | setbp(p->bpaddr); | |
895 | endfor | |
896 | } | |
897 | ||
898 | /* | |
899 | * Undo damage done by "setallbps". | |
900 | */ | |
901 | ||
902 | public unsetallbps() | |
903 | { | |
904 | register Breakpoint p; | |
905 | ||
906 | foreach (Breakpoint, p, bplist) | |
907 | unsetbp(p->bpaddr); | |
908 | endfor | |
909 | } |