Commit | Line | Data |
---|---|---|
6eb0951d ML |
1 | /* Copyright (c) 1982 Regents of the University of California */ |
2 | ||
d5883e09 | 3 | static char sccsid[] = "@(#)printsym.c 1.9 %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", | |
20614ea9 | 44 | "procparam", "funcparam", "module", "tag", "common", "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. | |
121 | */ | |
122 | ||
123 | public printparams(f, frame) | |
124 | Symbol f; | |
125 | Frame frame; | |
126 | { | |
127 | Symbol param; | |
128 | int n, m, s; | |
129 | ||
130 | n = nargspassed(frame); | |
131 | param = f->chain; | |
132 | if (param != nil or n > 0) { | |
133 | printf("("); | |
134 | m = n; | |
135 | if (param != nil) { | |
136 | for (;;) { | |
137 | s = size(param) div sizeof(Word); | |
138 | if (s == 0) { | |
139 | s = 1; | |
140 | } | |
141 | m -= s; | |
142 | printv(param, frame); | |
143 | param = param->chain; | |
144 | if (param == nil) break; | |
145 | printf(", "); | |
146 | } | |
147 | } | |
148 | if (m > 0) { | |
b38a9c14 ML |
149 | if (m > MAXARGSPASSED) { |
150 | m = MAXARGSPASSED; | |
151 | } | |
6eb0951d ML |
152 | if (f->chain != nil) { |
153 | printf(", "); | |
154 | } | |
155 | for (;;) { | |
156 | --m; | |
157 | printf("0x%x", argn(n - m, frame)); | |
158 | if (m <= 0) break; | |
159 | printf(", "); | |
160 | } | |
161 | } | |
162 | printf(")"); | |
163 | } | |
164 | } | |
165 | ||
166 | /* | |
167 | * Test if a symbol should be printed. We don't print files, | |
168 | * for example, simply because there's no good way to do it. | |
169 | * The symbol must be within the given function. | |
170 | */ | |
171 | ||
172 | public Boolean should_print(s) | |
173 | Symbol s; | |
174 | { | |
175 | Boolean b; | |
176 | register Symbol t; | |
177 | ||
178 | switch (s->class) { | |
179 | case VAR: | |
180 | case FVAR: | |
eb18c137 ML |
181 | if (isparam(s)) { |
182 | b = false; | |
183 | } else { | |
184 | t = rtype(s->type); | |
185 | if (t == nil) { | |
186 | b = false; | |
187 | } else { | |
188 | switch (t->class) { | |
189 | case FILET: | |
190 | case SET: | |
eb18c137 ML |
191 | case BADUSE: |
192 | b = false; | |
193 | break; | |
194 | ||
195 | default: | |
196 | b = true; | |
197 | break; | |
198 | } | |
199 | } | |
200 | } | |
6eb0951d ML |
201 | break; |
202 | ||
203 | default: | |
204 | b = false; | |
205 | break; | |
206 | } | |
207 | return b; | |
208 | } | |
209 | ||
210 | /* | |
211 | * Print the name and value of a variable. | |
212 | */ | |
213 | ||
214 | public printv(s, frame) | |
215 | Symbol s; | |
216 | Frame frame; | |
217 | { | |
218 | Address addr; | |
219 | int len; | |
220 | ||
221 | if (isambiguous(s) and ismodule(container(s))) { | |
222 | printname(stdout, s); | |
223 | printf(" = "); | |
224 | } else { | |
225 | printf("%s = ", symname(s)); | |
226 | } | |
63a90519 AF |
227 | if(s->type->class == ARRAY && (! istypename(s->type->type,"char")) ) { |
228 | printf(" ARRAY "); | |
6eb0951d | 229 | } else { |
63a90519 AF |
230 | if (isvarparam(s)) { |
231 | rpush(address(s, frame), sizeof(Address)); | |
232 | addr = pop(Address); | |
233 | len = size(s->type); | |
234 | } else { | |
235 | addr = address(s, frame); | |
236 | len = size(s); | |
237 | } | |
238 | if (canpush(len)) { | |
239 | rpush(addr, len); | |
240 | printval(s->type); | |
241 | } else { | |
242 | printf("*** expression too large ***"); | |
243 | } | |
244 | } | |
6eb0951d ML |
245 | } |
246 | ||
247 | /* | |
248 | * Print out the name of a symbol. | |
249 | */ | |
250 | ||
251 | public printname(f, s) | |
252 | File f; | |
253 | Symbol s; | |
254 | { | |
255 | if (s == nil) { | |
256 | fprintf(f, "(noname)"); | |
257 | } else if (isredirected() or isambiguous(s)) { | |
258 | printwhich(f, s); | |
259 | } else { | |
260 | fprintf(f, "%s", symname(s)); | |
261 | } | |
262 | } | |
263 | ||
264 | /* | |
265 | * Print the fully specified variable that is described by the given identifer. | |
266 | */ | |
267 | ||
268 | public printwhich(f, s) | |
269 | File f; | |
270 | Symbol s; | |
271 | { | |
272 | printouter(f, container(s)); | |
273 | fprintf(f, "%s", symname(s)); | |
274 | } | |
275 | ||
276 | /* | |
277 | * Print the fully qualified name of each symbol that has the same name | |
278 | * as the given symbol. | |
279 | */ | |
280 | ||
281 | public printwhereis(f, s) | |
282 | File f; | |
283 | Symbol s; | |
284 | { | |
285 | register Name n; | |
286 | register Symbol t; | |
287 | ||
288 | checkref(s); | |
289 | n = s->name; | |
290 | t = lookup(n); | |
291 | printwhich(f, t); | |
292 | t = t->next_sym; | |
293 | while (t != nil) { | |
294 | if (t->name == n) { | |
295 | putc(' ', f); | |
296 | printwhich(f, t); | |
297 | } | |
298 | t = t->next_sym; | |
299 | } | |
300 | putc('\n', f); | |
301 | } | |
302 | ||
303 | private printouter(f, s) | |
304 | File f; | |
305 | Symbol s; | |
306 | { | |
307 | Symbol outer; | |
308 | ||
309 | if (s != nil) { | |
310 | outer = container(s); | |
311 | if (outer != nil and outer != program) { | |
312 | printouter(f, outer); | |
313 | } | |
314 | fprintf(f, "%s.", symname(s)); | |
315 | } | |
316 | } | |
317 | ||
318 | public printdecl(s) | |
319 | Symbol s; | |
320 | { | |
321 | checkref(s); | |
322 | (*language_op(s->language, L_PRINTDECL))(s); | |
323 | } | |
324 | ||
325 | /* | |
326 | * Straight dump of symbol information. | |
327 | */ | |
328 | ||
329 | public psym(s) | |
330 | Symbol s; | |
331 | { | |
332 | printf("name\t%s\n", symname(s)); | |
333 | printf("lang\t%s\n", language_name(s->language)); | |
334 | printf("level\t%d\n", s->level); | |
335 | printf("class\t%s\n", classname(s)); | |
336 | printf("type\t0x%x", s->type); | |
337 | if (s->type != nil and s->type->name != nil) { | |
338 | printf(" (%s)", symname(s->type)); | |
339 | } | |
340 | printf("\nchain\t0x%x", s->chain); | |
341 | if (s->chain != nil and s->chain->name != nil) { | |
342 | printf(" (%s)", symname(s->chain)); | |
343 | } | |
344 | printf("\nblock\t0x%x", s->block); | |
345 | if (s->block->name != nil) { | |
346 | printf(" ("); | |
347 | printname(stdout, s->block); | |
348 | putchar(')'); | |
349 | } | |
350 | putchar('\n'); | |
351 | switch (s->class) { | |
352 | case VAR: | |
353 | case REF: | |
354 | if (s->level >= 3) { | |
355 | printf("address\t0x%x\n", s->symvalue.offset); | |
356 | } else { | |
357 | printf("offset\t%d\n", s->symvalue.offset); | |
358 | } | |
4dc0ac37 | 359 | printf("size\t%d\n", size(s)); |
6eb0951d ML |
360 | break; |
361 | ||
362 | case RECORD: | |
363 | case VARNT: | |
364 | printf("size\t%d\n", s->symvalue.offset); | |
365 | break; | |
366 | ||
367 | case FIELD: | |
368 | printf("offset\t%d\n", s->symvalue.field.offset); | |
369 | printf("size\t%d\n", s->symvalue.field.length); | |
370 | break; | |
371 | ||
372 | case PROC: | |
373 | case FUNC: | |
374 | printf("address\t0x%x\n", s->symvalue.funcv.beginaddr); | |
b38a9c14 ML |
375 | if (nosource(s)) { |
376 | printf("does not have source information\n"); | |
377 | } else { | |
378 | printf("has source information\n"); | |
379 | } | |
6eb0951d ML |
380 | break; |
381 | ||
382 | case RANGE: | |
20614ea9 AF |
383 | switch(s->symvalue.rangev.lowertype) { |
384 | ||
385 | case R_CONST : printf("CONST"); | |
386 | break; | |
387 | case R_ARG : printf("ARG"); | |
388 | break; | |
389 | case R_TEMP : printf("TEMP"); | |
390 | break; | |
391 | case R_ADJUST : printf("ADJUST"); | |
392 | break; | |
393 | } | |
6eb0951d | 394 | printf("lower\t%d\n", s->symvalue.rangev.lower); |
20614ea9 AF |
395 | |
396 | switch(s->symvalue.rangev.uppertype) { | |
397 | ||
398 | case R_CONST : printf("CONST"); | |
399 | break; | |
400 | case R_ARG : printf("ARG"); | |
401 | break; | |
402 | case R_TEMP : printf("TEMP"); | |
403 | break; | |
404 | case R_ADJUST : printf("ADJUST"); | |
405 | break; | |
406 | } | |
407 | ||
6eb0951d ML |
408 | printf("upper\t%d\n", s->symvalue.rangev.upper); |
409 | break; | |
410 | ||
411 | default: | |
412 | /* do nothing */ | |
413 | break; | |
414 | } | |
415 | } | |
416 | ||
417 | /* | |
418 | * Print out the value on top of the stack according to the given type. | |
419 | */ | |
420 | ||
421 | public printval(t) | |
422 | Symbol t; | |
423 | { | |
424 | Symbol s; | |
425 | ||
426 | checkref(t); | |
427 | switch (t->class) { | |
428 | case PROC: | |
429 | case FUNC: | |
430 | s = pop(Symbol); | |
431 | printf("%s", symname(s)); | |
432 | break; | |
433 | ||
434 | default: | |
435 | if (t->language == nil) { | |
436 | error("unknown language"); | |
437 | } else { | |
438 | (*language_op(t->language, L_PRINTVAL))(t); | |
439 | } | |
440 | break; | |
441 | } | |
442 | } | |
443 | ||
444 | /* | |
445 | * Print out the value of a record, field by field. | |
446 | */ | |
447 | ||
448 | public printrecord(s) | |
449 | Symbol s; | |
450 | { | |
451 | if (s->chain == nil) { | |
452 | error("record has no fields"); | |
453 | } | |
454 | printf("("); | |
455 | sp -= size(s); | |
456 | printfield(s->chain); | |
457 | printf(")"); | |
458 | } | |
459 | ||
460 | /* | |
461 | * Print out a field, first printing out other fields. | |
462 | * This is done because the fields are chained together backwards. | |
463 | */ | |
464 | ||
465 | private printfield(s) | |
466 | Symbol s; | |
467 | { | |
468 | Stack *savesp; | |
469 | ||
470 | if (s->chain != nil) { | |
471 | printfield(s->chain); | |
472 | printf(", "); | |
473 | } | |
474 | printf("%s = ", symname(s)); | |
475 | savesp = sp; | |
476 | sp += ((s->symvalue.field.offset div BITSPERBYTE) + size(s->type)); | |
477 | printval(s); | |
478 | sp = savesp; | |
479 | } | |
480 | ||
481 | /* | |
482 | * Print out the contents of an array. | |
483 | * Haven't quite figured out what the best format is. | |
484 | * | |
485 | * This is rather inefficient. | |
486 | * | |
487 | * The "2*elsize" is there since "printval" drops the stack by elsize. | |
488 | */ | |
489 | ||
490 | public printarray(a) | |
491 | Symbol a; | |
492 | { | |
493 | Stack *savesp, *newsp; | |
494 | Symbol eltype; | |
495 | long elsize; | |
496 | String sep; | |
497 | ||
498 | savesp = sp; | |
20614ea9 | 499 | sp -= (size(a)); |
6eb0951d ML |
500 | newsp = sp; |
501 | eltype = rtype(a->type); | |
502 | elsize = size(eltype); | |
503 | printf("("); | |
504 | if (eltype->class == RECORD or eltype->class == ARRAY or | |
505 | eltype->class == VARNT) { | |
506 | sep = "\n"; | |
507 | putchar('\n'); | |
508 | } else { | |
509 | sep = ", "; | |
510 | } | |
511 | for (sp += elsize; sp <= savesp; sp += 2*elsize) { | |
512 | if (sp - elsize != newsp) { | |
513 | fputs(sep, stdout); | |
514 | } | |
515 | printval(eltype); | |
516 | } | |
517 | sp = newsp; | |
518 | if (streq(sep, "\n")) { | |
519 | putchar('\n'); | |
520 | } | |
521 | printf(")"); | |
522 | } | |
523 | ||
524 | /* | |
525 | * Print out the value of a real number in Pascal notation. | |
526 | * This is, unfortunately, different than what one gets | |
527 | * from "%g" in printf. | |
528 | */ | |
529 | ||
530 | public prtreal(r) | |
531 | double r; | |
532 | { | |
533 | extern char *index(); | |
534 | char buf[256]; | |
535 | ||
536 | sprintf(buf, "%g", r); | |
537 | if (buf[0] == '.') { | |
538 | printf("0%s", buf); | |
539 | } else if (buf[0] == '-' and buf[1] == '.') { | |
540 | printf("-0%s", &buf[1]); | |
541 | } else { | |
542 | printf("%s", buf); | |
543 | } | |
544 | if (index(buf, '.') == nil) { | |
545 | printf(".0"); | |
546 | } | |
547 | } | |
548 | ||
549 | /* | |
550 | * Print out a character using ^? notation for unprintables. | |
551 | */ | |
552 | ||
553 | public printchar(c) | |
554 | char c; | |
555 | { | |
556 | if (c == 0) { | |
557 | putchar('\\'); | |
558 | putchar('0'); | |
559 | } else if (c == '\n') { | |
560 | putchar('\\'); | |
561 | putchar('n'); | |
562 | } else if (c > 0 and c < ' ') { | |
563 | putchar('^'); | |
564 | putchar(c - 1 + 'A'); | |
565 | } else { | |
566 | putchar(c); | |
567 | } | |
568 | } |