Commit | Line | Data |
---|---|---|
6eb0951d ML |
1 | /* Copyright (c) 1982 Regents of the University of California */ |
2 | ||
e1f4dbca | 3 | static char sccsid[] = "@(#)printsym.c 1.13 (Berkeley) %G%"; |
6eb0951d ML |
4 | |
5 | /* | |
6 | * Printing of symbolic information. | |
7 | */ | |
8 | ||
9 | #include "defs.h" | |
10 | #include "symbols.h" | |
11 | #include "languages.h" | |
12 | #include "printsym.h" | |
13 | #include "tree.h" | |
14 | #include "eval.h" | |
15 | #include "mappings.h" | |
16 | #include "process.h" | |
17 | #include "runtime.h" | |
18 | #include "machine.h" | |
19 | #include "names.h" | |
20 | #include "main.h" | |
21 | ||
22 | #ifndef public | |
23 | #endif | |
24 | ||
b38a9c14 ML |
25 | /* |
26 | * Maximum number of arguments to a function. | |
27 | * This is used as a check for the possibility that the stack has been | |
28 | * overwritten and therefore a saved argument pointer might indicate | |
29 | * to an absurdly large number of arguments. | |
30 | */ | |
31 | ||
32 | #define MAXARGSPASSED 20 | |
33 | ||
6eb0951d ML |
34 | /* |
35 | * Return a pointer to the string for the name of the class that | |
36 | * the given symbol belongs to. | |
37 | */ | |
38 | ||
39 | private String clname[] = { | |
40 | "bad use", "constant", "type", "variable", "array", "fileptr", | |
41 | "record", "field", "procedure", "function", "funcvar", | |
42 | "ref", "pointer", "file", "set", "range", "label", "withptr", | |
43 | "scalar", "string", "program", "improper", "variant", | |
2fd0f574 | 44 | "procparam", "funcparam", "module", "tag", "common", "extref", "typeref" |
6eb0951d ML |
45 | }; |
46 | ||
47 | public String classname(s) | |
48 | Symbol s; | |
49 | { | |
50 | return clname[ord(s->class)]; | |
51 | } | |
52 | ||
53 | /* | |
54 | * Note the entry of the given block, unless it's the main program. | |
55 | */ | |
56 | ||
57 | public printentry(s) | |
58 | Symbol s; | |
59 | { | |
60 | if (s != program) { | |
61 | printf("\nentering %s %s\n", classname(s), symname(s)); | |
62 | } | |
63 | } | |
64 | ||
65 | /* | |
66 | * Note the exit of the given block | |
67 | */ | |
68 | ||
69 | public printexit(s) | |
70 | Symbol s; | |
71 | { | |
72 | if (s != program) { | |
73 | printf("leaving %s %s\n\n", classname(s), symname(s)); | |
74 | } | |
75 | } | |
76 | ||
77 | /* | |
78 | * Note the call of s from t. | |
79 | */ | |
80 | ||
81 | public printcall(s, t) | |
82 | Symbol s, t; | |
83 | { | |
84 | printf("calling %s", symname(s)); | |
85 | printparams(s, nil); | |
86 | printf(" from %s %s\n", classname(t), symname(t)); | |
87 | } | |
88 | ||
89 | /* | |
90 | * Note the return from s. If s is a function, print the value | |
91 | * it is returning. This is somewhat painful, since the function | |
92 | * has actually just returned. | |
93 | */ | |
94 | ||
95 | public printrtn(s) | |
96 | Symbol s; | |
97 | { | |
98 | register Symbol t; | |
99 | register int len; | |
100 | Boolean isindirect; | |
101 | ||
102 | printf("returning "); | |
63a90519 | 103 | if (s->class == FUNC && (!istypename(s->type,"void"))) { |
6eb0951d ML |
104 | len = size(s->type); |
105 | if (canpush(len)) { | |
106 | t = rtype(s->type); | |
107 | isindirect = (Boolean) (t->class == RECORD or t->class == VARNT); | |
108 | pushretval(len, isindirect); | |
109 | printval(s->type); | |
110 | putchar(' '); | |
111 | } else { | |
112 | printf("(value too large) "); | |
113 | } | |
114 | } | |
115 | printf("from %s\n", symname(s)); | |
116 | } | |
117 | ||
118 | /* | |
119 | * Print the values of the parameters of the given procedure or function. | |
120 | * The frame distinguishes recursive instances of a procedure. | |
2fd0f574 SL |
121 | * |
122 | * If the procedure or function is internal, the argument count is | |
123 | * not valid so we ignore it. | |
6eb0951d ML |
124 | */ |
125 | ||
126 | public printparams(f, frame) | |
127 | Symbol f; | |
128 | Frame frame; | |
129 | { | |
130 | Symbol param; | |
131 | int n, m, s; | |
132 | ||
133 | n = nargspassed(frame); | |
2fd0f574 SL |
134 | if (isinternal(f)) { |
135 | n = 0; | |
136 | } | |
6eb0951d ML |
137 | param = f->chain; |
138 | if (param != nil or n > 0) { | |
139 | printf("("); | |
140 | m = n; | |
141 | if (param != nil) { | |
142 | for (;;) { | |
143 | s = size(param) div sizeof(Word); | |
144 | if (s == 0) { | |
145 | s = 1; | |
146 | } | |
147 | m -= s; | |
148 | printv(param, frame); | |
149 | param = param->chain; | |
150 | if (param == nil) break; | |
151 | printf(", "); | |
152 | } | |
153 | } | |
154 | if (m > 0) { | |
b38a9c14 ML |
155 | if (m > MAXARGSPASSED) { |
156 | m = MAXARGSPASSED; | |
157 | } | |
6eb0951d ML |
158 | if (f->chain != nil) { |
159 | printf(", "); | |
160 | } | |
161 | for (;;) { | |
162 | --m; | |
163 | printf("0x%x", argn(n - m, frame)); | |
164 | if (m <= 0) break; | |
165 | printf(", "); | |
166 | } | |
167 | } | |
168 | printf(")"); | |
169 | } | |
170 | } | |
171 | ||
172 | /* | |
173 | * Test if a symbol should be printed. We don't print files, | |
174 | * for example, simply because there's no good way to do it. | |
175 | * The symbol must be within the given function. | |
176 | */ | |
177 | ||
178 | public Boolean should_print(s) | |
179 | Symbol s; | |
180 | { | |
181 | Boolean b; | |
182 | register Symbol t; | |
183 | ||
184 | switch (s->class) { | |
185 | case VAR: | |
186 | case FVAR: | |
eb18c137 ML |
187 | if (isparam(s)) { |
188 | b = false; | |
189 | } else { | |
190 | t = rtype(s->type); | |
191 | if (t == nil) { | |
192 | b = false; | |
193 | } else { | |
194 | switch (t->class) { | |
195 | case FILET: | |
196 | case SET: | |
eb18c137 ML |
197 | case BADUSE: |
198 | b = false; | |
199 | break; | |
200 | ||
201 | default: | |
202 | b = true; | |
203 | break; | |
204 | } | |
205 | } | |
206 | } | |
6eb0951d ML |
207 | break; |
208 | ||
209 | default: | |
210 | b = false; | |
211 | break; | |
212 | } | |
213 | return b; | |
214 | } | |
215 | ||
216 | /* | |
217 | * Print the name and value of a variable. | |
218 | */ | |
219 | ||
220 | public printv(s, frame) | |
221 | Symbol s; | |
222 | Frame frame; | |
223 | { | |
224 | Address addr; | |
225 | int len; | |
2fd0f574 | 226 | Symbol t; |
6eb0951d ML |
227 | |
228 | if (isambiguous(s) and ismodule(container(s))) { | |
229 | printname(stdout, s); | |
230 | printf(" = "); | |
231 | } else { | |
232 | printf("%s = ", symname(s)); | |
233 | } | |
2fd0f574 SL |
234 | /* |
235 | * Not today. | |
236 | t = rtype(s->type); | |
237 | if (t->class == ARRAY and not istypename(t->type, "char")) { | |
238 | printf("ARRAY"); | |
6eb0951d | 239 | } else { |
2fd0f574 | 240 | */ |
63a90519 AF |
241 | if (isvarparam(s)) { |
242 | rpush(address(s, frame), sizeof(Address)); | |
243 | addr = pop(Address); | |
244 | len = size(s->type); | |
245 | } else { | |
246 | addr = address(s, frame); | |
247 | len = size(s); | |
248 | } | |
249 | if (canpush(len)) { | |
250 | rpush(addr, len); | |
251 | printval(s->type); | |
252 | } else { | |
253 | printf("*** expression too large ***"); | |
254 | } | |
2fd0f574 SL |
255 | /* |
256 | * Matches brace commented out above. | |
63a90519 | 257 | } |
2fd0f574 | 258 | */ |
6eb0951d ML |
259 | } |
260 | ||
261 | /* | |
262 | * Print out the name of a symbol. | |
263 | */ | |
264 | ||
265 | public printname(f, s) | |
266 | File f; | |
267 | Symbol s; | |
268 | { | |
269 | if (s == nil) { | |
270 | fprintf(f, "(noname)"); | |
2fd0f574 SL |
271 | } else if (s == program) { |
272 | fprintf(f, "."); | |
6eb0951d ML |
273 | } else if (isredirected() or isambiguous(s)) { |
274 | printwhich(f, s); | |
275 | } else { | |
276 | fprintf(f, "%s", symname(s)); | |
277 | } | |
278 | } | |
279 | ||
280 | /* | |
281 | * Print the fully specified variable that is described by the given identifer. | |
282 | */ | |
283 | ||
284 | public printwhich(f, s) | |
285 | File f; | |
286 | Symbol s; | |
287 | { | |
288 | printouter(f, container(s)); | |
289 | fprintf(f, "%s", symname(s)); | |
290 | } | |
291 | ||
292 | /* | |
293 | * Print the fully qualified name of each symbol that has the same name | |
294 | * as the given symbol. | |
295 | */ | |
296 | ||
297 | public printwhereis(f, s) | |
298 | File f; | |
299 | Symbol s; | |
300 | { | |
301 | register Name n; | |
302 | register Symbol t; | |
303 | ||
304 | checkref(s); | |
305 | n = s->name; | |
306 | t = lookup(n); | |
307 | printwhich(f, t); | |
308 | t = t->next_sym; | |
309 | while (t != nil) { | |
310 | if (t->name == n) { | |
311 | putc(' ', f); | |
312 | printwhich(f, t); | |
313 | } | |
314 | t = t->next_sym; | |
315 | } | |
316 | putc('\n', f); | |
317 | } | |
318 | ||
319 | private printouter(f, s) | |
320 | File f; | |
321 | Symbol s; | |
322 | { | |
323 | Symbol outer; | |
324 | ||
325 | if (s != nil) { | |
326 | outer = container(s); | |
327 | if (outer != nil and outer != program) { | |
328 | printouter(f, outer); | |
329 | } | |
330 | fprintf(f, "%s.", symname(s)); | |
331 | } | |
332 | } | |
333 | ||
334 | public printdecl(s) | |
335 | Symbol s; | |
336 | { | |
337 | checkref(s); | |
338 | (*language_op(s->language, L_PRINTDECL))(s); | |
339 | } | |
340 | ||
341 | /* | |
342 | * Straight dump of symbol information. | |
343 | */ | |
344 | ||
345 | public psym(s) | |
346 | Symbol s; | |
347 | { | |
348 | printf("name\t%s\n", symname(s)); | |
349 | printf("lang\t%s\n", language_name(s->language)); | |
350 | printf("level\t%d\n", s->level); | |
351 | printf("class\t%s\n", classname(s)); | |
352 | printf("type\t0x%x", s->type); | |
353 | if (s->type != nil and s->type->name != nil) { | |
354 | printf(" (%s)", symname(s->type)); | |
355 | } | |
356 | printf("\nchain\t0x%x", s->chain); | |
357 | if (s->chain != nil and s->chain->name != nil) { | |
358 | printf(" (%s)", symname(s->chain)); | |
359 | } | |
360 | printf("\nblock\t0x%x", s->block); | |
361 | if (s->block->name != nil) { | |
362 | printf(" ("); | |
363 | printname(stdout, s->block); | |
364 | putchar(')'); | |
365 | } | |
366 | putchar('\n'); | |
367 | switch (s->class) { | |
368 | case VAR: | |
369 | case REF: | |
370 | if (s->level >= 3) { | |
371 | printf("address\t0x%x\n", s->symvalue.offset); | |
372 | } else { | |
373 | printf("offset\t%d\n", s->symvalue.offset); | |
374 | } | |
4dc0ac37 | 375 | printf("size\t%d\n", size(s)); |
6eb0951d ML |
376 | break; |
377 | ||
378 | case RECORD: | |
379 | case VARNT: | |
380 | printf("size\t%d\n", s->symvalue.offset); | |
381 | break; | |
382 | ||
383 | case FIELD: | |
384 | printf("offset\t%d\n", s->symvalue.field.offset); | |
385 | printf("size\t%d\n", s->symvalue.field.length); | |
386 | break; | |
387 | ||
8ee43d3e | 388 | case PROG: |
6eb0951d ML |
389 | case PROC: |
390 | case FUNC: | |
391 | printf("address\t0x%x\n", s->symvalue.funcv.beginaddr); | |
a71dda28 | 392 | if (isinline(s)) { |
ffa66ed0 | 393 | printf("inline procedure\n"); |
a71dda28 | 394 | } |
b38a9c14 ML |
395 | if (nosource(s)) { |
396 | printf("does not have source information\n"); | |
397 | } else { | |
398 | printf("has source information\n"); | |
399 | } | |
6eb0951d ML |
400 | break; |
401 | ||
402 | case RANGE: | |
8ee43d3e ML |
403 | prangetype(s->symvalue.rangev.lowertype); |
404 | printf("lower\t%d\n", s->symvalue.rangev.lower); | |
405 | prangetype(s->symvalue.rangev.uppertype); | |
6eb0951d ML |
406 | printf("upper\t%d\n", s->symvalue.rangev.upper); |
407 | break; | |
408 | ||
409 | default: | |
410 | /* do nothing */ | |
411 | break; | |
412 | } | |
413 | } | |
414 | ||
8ee43d3e ML |
415 | private prangetype(r) |
416 | Rangetype r; | |
417 | { | |
418 | switch (r) { | |
419 | case R_CONST: | |
420 | printf("CONST"); | |
421 | break; | |
422 | ||
423 | case R_ARG: | |
424 | printf("ARG"); | |
425 | break; | |
426 | ||
427 | case R_TEMP: | |
428 | printf("TEMP"); | |
429 | break; | |
430 | ||
431 | case R_ADJUST: | |
432 | printf("ADJUST"); | |
433 | break; | |
434 | } | |
435 | } | |
436 | ||
6eb0951d ML |
437 | /* |
438 | * Print out the value on top of the stack according to the given type. | |
439 | */ | |
440 | ||
441 | public printval(t) | |
442 | Symbol t; | |
443 | { | |
444 | Symbol s; | |
445 | ||
446 | checkref(t); | |
2fd0f574 SL |
447 | if (t->class == TYPEREF) { |
448 | resolveRef(t); | |
449 | } | |
6eb0951d ML |
450 | switch (t->class) { |
451 | case PROC: | |
452 | case FUNC: | |
453 | s = pop(Symbol); | |
454 | printf("%s", symname(s)); | |
455 | break; | |
456 | ||
457 | default: | |
458 | if (t->language == nil) { | |
459 | error("unknown language"); | |
2fd0f574 SL |
460 | } else if (t->language == primlang) { |
461 | (*language_op(findlanguage(".c"), L_PRINTVAL))(t); | |
6eb0951d ML |
462 | } else { |
463 | (*language_op(t->language, L_PRINTVAL))(t); | |
464 | } | |
465 | break; | |
466 | } | |
467 | } | |
468 | ||
469 | /* | |
470 | * Print out the value of a record, field by field. | |
471 | */ | |
472 | ||
473 | public printrecord(s) | |
474 | Symbol s; | |
475 | { | |
2fd0f574 SL |
476 | Symbol f; |
477 | ||
6eb0951d ML |
478 | if (s->chain == nil) { |
479 | error("record has no fields"); | |
480 | } | |
481 | printf("("); | |
482 | sp -= size(s); | |
2fd0f574 SL |
483 | f = s->chain; |
484 | if (f != nil) { | |
485 | for (;;) { | |
486 | printfield(f); | |
487 | f = f->chain; | |
488 | if (f == nil) break; | |
489 | printf(", "); | |
490 | } | |
491 | } | |
6eb0951d ML |
492 | printf(")"); |
493 | } | |
494 | ||
495 | /* | |
2fd0f574 | 496 | * Print out a field. |
6eb0951d ML |
497 | */ |
498 | ||
2fd0f574 SL |
499 | private printfield(f) |
500 | Symbol f; | |
6eb0951d ML |
501 | { |
502 | Stack *savesp; | |
2fd0f574 | 503 | register int off, len; |
6eb0951d | 504 | |
2fd0f574 | 505 | printf("%s = ", symname(f)); |
6eb0951d | 506 | savesp = sp; |
2fd0f574 SL |
507 | off = f->symvalue.field.offset; |
508 | len = f->symvalue.field.length; | |
509 | sp += ((off + len + BITSPERBYTE - 1) div BITSPERBYTE); | |
510 | printval(f); | |
6eb0951d ML |
511 | sp = savesp; |
512 | } | |
513 | ||
514 | /* | |
515 | * Print out the contents of an array. | |
516 | * Haven't quite figured out what the best format is. | |
517 | * | |
518 | * This is rather inefficient. | |
519 | * | |
520 | * The "2*elsize" is there since "printval" drops the stack by elsize. | |
521 | */ | |
522 | ||
523 | public printarray(a) | |
524 | Symbol a; | |
525 | { | |
526 | Stack *savesp, *newsp; | |
527 | Symbol eltype; | |
528 | long elsize; | |
529 | String sep; | |
530 | ||
531 | savesp = sp; | |
20614ea9 | 532 | sp -= (size(a)); |
6eb0951d ML |
533 | newsp = sp; |
534 | eltype = rtype(a->type); | |
535 | elsize = size(eltype); | |
536 | printf("("); | |
537 | if (eltype->class == RECORD or eltype->class == ARRAY or | |
538 | eltype->class == VARNT) { | |
539 | sep = "\n"; | |
540 | putchar('\n'); | |
541 | } else { | |
542 | sep = ", "; | |
543 | } | |
544 | for (sp += elsize; sp <= savesp; sp += 2*elsize) { | |
545 | if (sp - elsize != newsp) { | |
546 | fputs(sep, stdout); | |
547 | } | |
548 | printval(eltype); | |
549 | } | |
550 | sp = newsp; | |
551 | if (streq(sep, "\n")) { | |
552 | putchar('\n'); | |
553 | } | |
554 | printf(")"); | |
555 | } | |
556 | ||
557 | /* | |
558 | * Print out the value of a real number in Pascal notation. | |
559 | * This is, unfortunately, different than what one gets | |
560 | * from "%g" in printf. | |
561 | */ | |
562 | ||
563 | public prtreal(r) | |
564 | double r; | |
565 | { | |
566 | extern char *index(); | |
567 | char buf[256]; | |
568 | ||
569 | sprintf(buf, "%g", r); | |
570 | if (buf[0] == '.') { | |
571 | printf("0%s", buf); | |
572 | } else if (buf[0] == '-' and buf[1] == '.') { | |
573 | printf("-0%s", &buf[1]); | |
574 | } else { | |
575 | printf("%s", buf); | |
576 | } | |
577 | if (index(buf, '.') == nil) { | |
578 | printf(".0"); | |
579 | } | |
580 | } | |
581 | ||
582 | /* | |
583 | * Print out a character using ^? notation for unprintables. | |
584 | */ | |
585 | ||
586 | public printchar(c) | |
587 | char c; | |
588 | { | |
589 | if (c == 0) { | |
590 | putchar('\\'); | |
591 | putchar('0'); | |
592 | } else if (c == '\n') { | |
593 | putchar('\\'); | |
594 | putchar('n'); | |
595 | } else if (c > 0 and c < ' ') { | |
596 | putchar('^'); | |
597 | putchar(c - 1 + 'A'); | |
2fd0f574 | 598 | } else if (c >= ' ' && c <= '~') { |
6eb0951d | 599 | putchar(c); |
2fd0f574 SL |
600 | } else { |
601 | printf("\\0%o",c); | |
6eb0951d ML |
602 | } |
603 | } |