Commit | Line | Data |
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6eb0951d ML |
1 | /* Copyright (c) 1982 Regents of the University of California */ |
2 | ||
63a90519 | 3 | static char sccsid[] = "@(#)printsym.c 1.7 %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: | |
181 | t = rtype(s->type); | |
182 | b = (Boolean) ( | |
183 | not isparam(s) and | |
184 | t != nil and t->class != FILET and t->class != SET | |
185 | ); | |
186 | break; | |
187 | ||
188 | default: | |
189 | b = false; | |
190 | break; | |
191 | } | |
192 | return b; | |
193 | } | |
194 | ||
195 | /* | |
196 | * Print the name and value of a variable. | |
197 | */ | |
198 | ||
199 | public printv(s, frame) | |
200 | Symbol s; | |
201 | Frame frame; | |
202 | { | |
203 | Address addr; | |
204 | int len; | |
205 | ||
206 | if (isambiguous(s) and ismodule(container(s))) { | |
207 | printname(stdout, s); | |
208 | printf(" = "); | |
209 | } else { | |
210 | printf("%s = ", symname(s)); | |
211 | } | |
63a90519 AF |
212 | if(s->type->class == ARRAY && (! istypename(s->type->type,"char")) ) { |
213 | printf(" ARRAY "); | |
6eb0951d | 214 | } else { |
63a90519 AF |
215 | if (isvarparam(s)) { |
216 | rpush(address(s, frame), sizeof(Address)); | |
217 | addr = pop(Address); | |
218 | len = size(s->type); | |
219 | } else { | |
220 | addr = address(s, frame); | |
221 | len = size(s); | |
222 | } | |
223 | if (canpush(len)) { | |
224 | rpush(addr, len); | |
225 | printval(s->type); | |
226 | } else { | |
227 | printf("*** expression too large ***"); | |
228 | } | |
229 | } | |
6eb0951d ML |
230 | } |
231 | ||
232 | /* | |
233 | * Print out the name of a symbol. | |
234 | */ | |
235 | ||
236 | public printname(f, s) | |
237 | File f; | |
238 | Symbol s; | |
239 | { | |
240 | if (s == nil) { | |
241 | fprintf(f, "(noname)"); | |
242 | } else if (isredirected() or isambiguous(s)) { | |
243 | printwhich(f, s); | |
244 | } else { | |
245 | fprintf(f, "%s", symname(s)); | |
246 | } | |
247 | } | |
248 | ||
249 | /* | |
250 | * Print the fully specified variable that is described by the given identifer. | |
251 | */ | |
252 | ||
253 | public printwhich(f, s) | |
254 | File f; | |
255 | Symbol s; | |
256 | { | |
257 | printouter(f, container(s)); | |
258 | fprintf(f, "%s", symname(s)); | |
259 | } | |
260 | ||
261 | /* | |
262 | * Print the fully qualified name of each symbol that has the same name | |
263 | * as the given symbol. | |
264 | */ | |
265 | ||
266 | public printwhereis(f, s) | |
267 | File f; | |
268 | Symbol s; | |
269 | { | |
270 | register Name n; | |
271 | register Symbol t; | |
272 | ||
273 | checkref(s); | |
274 | n = s->name; | |
275 | t = lookup(n); | |
276 | printwhich(f, t); | |
277 | t = t->next_sym; | |
278 | while (t != nil) { | |
279 | if (t->name == n) { | |
280 | putc(' ', f); | |
281 | printwhich(f, t); | |
282 | } | |
283 | t = t->next_sym; | |
284 | } | |
285 | putc('\n', f); | |
286 | } | |
287 | ||
288 | private printouter(f, s) | |
289 | File f; | |
290 | Symbol s; | |
291 | { | |
292 | Symbol outer; | |
293 | ||
294 | if (s != nil) { | |
295 | outer = container(s); | |
296 | if (outer != nil and outer != program) { | |
297 | printouter(f, outer); | |
298 | } | |
299 | fprintf(f, "%s.", symname(s)); | |
300 | } | |
301 | } | |
302 | ||
303 | public printdecl(s) | |
304 | Symbol s; | |
305 | { | |
306 | checkref(s); | |
307 | (*language_op(s->language, L_PRINTDECL))(s); | |
308 | } | |
309 | ||
310 | /* | |
311 | * Straight dump of symbol information. | |
312 | */ | |
313 | ||
314 | public psym(s) | |
315 | Symbol s; | |
316 | { | |
317 | printf("name\t%s\n", symname(s)); | |
318 | printf("lang\t%s\n", language_name(s->language)); | |
319 | printf("level\t%d\n", s->level); | |
320 | printf("class\t%s\n", classname(s)); | |
321 | printf("type\t0x%x", s->type); | |
322 | if (s->type != nil and s->type->name != nil) { | |
323 | printf(" (%s)", symname(s->type)); | |
324 | } | |
325 | printf("\nchain\t0x%x", s->chain); | |
326 | if (s->chain != nil and s->chain->name != nil) { | |
327 | printf(" (%s)", symname(s->chain)); | |
328 | } | |
329 | printf("\nblock\t0x%x", s->block); | |
330 | if (s->block->name != nil) { | |
331 | printf(" ("); | |
332 | printname(stdout, s->block); | |
333 | putchar(')'); | |
334 | } | |
335 | putchar('\n'); | |
336 | switch (s->class) { | |
337 | case VAR: | |
338 | case REF: | |
339 | if (s->level >= 3) { | |
340 | printf("address\t0x%x\n", s->symvalue.offset); | |
341 | } else { | |
342 | printf("offset\t%d\n", s->symvalue.offset); | |
343 | } | |
4dc0ac37 | 344 | printf("size\t%d\n", size(s)); |
6eb0951d ML |
345 | break; |
346 | ||
347 | case RECORD: | |
348 | case VARNT: | |
349 | printf("size\t%d\n", s->symvalue.offset); | |
350 | break; | |
351 | ||
352 | case FIELD: | |
353 | printf("offset\t%d\n", s->symvalue.field.offset); | |
354 | printf("size\t%d\n", s->symvalue.field.length); | |
355 | break; | |
356 | ||
357 | case PROC: | |
358 | case FUNC: | |
359 | printf("address\t0x%x\n", s->symvalue.funcv.beginaddr); | |
b38a9c14 ML |
360 | if (nosource(s)) { |
361 | printf("does not have source information\n"); | |
362 | } else { | |
363 | printf("has source information\n"); | |
364 | } | |
6eb0951d ML |
365 | break; |
366 | ||
367 | case RANGE: | |
20614ea9 AF |
368 | switch(s->symvalue.rangev.lowertype) { |
369 | ||
370 | case R_CONST : printf("CONST"); | |
371 | break; | |
372 | case R_ARG : printf("ARG"); | |
373 | break; | |
374 | case R_TEMP : printf("TEMP"); | |
375 | break; | |
376 | case R_ADJUST : printf("ADJUST"); | |
377 | break; | |
378 | } | |
6eb0951d | 379 | printf("lower\t%d\n", s->symvalue.rangev.lower); |
20614ea9 AF |
380 | |
381 | switch(s->symvalue.rangev.uppertype) { | |
382 | ||
383 | case R_CONST : printf("CONST"); | |
384 | break; | |
385 | case R_ARG : printf("ARG"); | |
386 | break; | |
387 | case R_TEMP : printf("TEMP"); | |
388 | break; | |
389 | case R_ADJUST : printf("ADJUST"); | |
390 | break; | |
391 | } | |
392 | ||
6eb0951d ML |
393 | printf("upper\t%d\n", s->symvalue.rangev.upper); |
394 | break; | |
395 | ||
396 | default: | |
397 | /* do nothing */ | |
398 | break; | |
399 | } | |
400 | } | |
401 | ||
402 | /* | |
403 | * Print out the value on top of the stack according to the given type. | |
404 | */ | |
405 | ||
406 | public printval(t) | |
407 | Symbol t; | |
408 | { | |
409 | Symbol s; | |
410 | ||
411 | checkref(t); | |
412 | switch (t->class) { | |
413 | case PROC: | |
414 | case FUNC: | |
415 | s = pop(Symbol); | |
416 | printf("%s", symname(s)); | |
417 | break; | |
418 | ||
419 | default: | |
420 | if (t->language == nil) { | |
421 | error("unknown language"); | |
422 | } else { | |
423 | (*language_op(t->language, L_PRINTVAL))(t); | |
424 | } | |
425 | break; | |
426 | } | |
427 | } | |
428 | ||
429 | /* | |
430 | * Print out the value of a record, field by field. | |
431 | */ | |
432 | ||
433 | public printrecord(s) | |
434 | Symbol s; | |
435 | { | |
436 | if (s->chain == nil) { | |
437 | error("record has no fields"); | |
438 | } | |
439 | printf("("); | |
440 | sp -= size(s); | |
441 | printfield(s->chain); | |
442 | printf(")"); | |
443 | } | |
444 | ||
445 | /* | |
446 | * Print out a field, first printing out other fields. | |
447 | * This is done because the fields are chained together backwards. | |
448 | */ | |
449 | ||
450 | private printfield(s) | |
451 | Symbol s; | |
452 | { | |
453 | Stack *savesp; | |
454 | ||
455 | if (s->chain != nil) { | |
456 | printfield(s->chain); | |
457 | printf(", "); | |
458 | } | |
459 | printf("%s = ", symname(s)); | |
460 | savesp = sp; | |
461 | sp += ((s->symvalue.field.offset div BITSPERBYTE) + size(s->type)); | |
462 | printval(s); | |
463 | sp = savesp; | |
464 | } | |
465 | ||
466 | /* | |
467 | * Print out the contents of an array. | |
468 | * Haven't quite figured out what the best format is. | |
469 | * | |
470 | * This is rather inefficient. | |
471 | * | |
472 | * The "2*elsize" is there since "printval" drops the stack by elsize. | |
473 | */ | |
474 | ||
475 | public printarray(a) | |
476 | Symbol a; | |
477 | { | |
478 | Stack *savesp, *newsp; | |
479 | Symbol eltype; | |
480 | long elsize; | |
481 | String sep; | |
482 | ||
483 | savesp = sp; | |
20614ea9 | 484 | sp -= (size(a)); |
6eb0951d ML |
485 | newsp = sp; |
486 | eltype = rtype(a->type); | |
487 | elsize = size(eltype); | |
488 | printf("("); | |
489 | if (eltype->class == RECORD or eltype->class == ARRAY or | |
490 | eltype->class == VARNT) { | |
491 | sep = "\n"; | |
492 | putchar('\n'); | |
493 | } else { | |
494 | sep = ", "; | |
495 | } | |
496 | for (sp += elsize; sp <= savesp; sp += 2*elsize) { | |
497 | if (sp - elsize != newsp) { | |
498 | fputs(sep, stdout); | |
499 | } | |
500 | printval(eltype); | |
501 | } | |
502 | sp = newsp; | |
503 | if (streq(sep, "\n")) { | |
504 | putchar('\n'); | |
505 | } | |
506 | printf(")"); | |
507 | } | |
508 | ||
509 | /* | |
510 | * Print out the value of a real number in Pascal notation. | |
511 | * This is, unfortunately, different than what one gets | |
512 | * from "%g" in printf. | |
513 | */ | |
514 | ||
515 | public prtreal(r) | |
516 | double r; | |
517 | { | |
518 | extern char *index(); | |
519 | char buf[256]; | |
520 | ||
521 | sprintf(buf, "%g", r); | |
522 | if (buf[0] == '.') { | |
523 | printf("0%s", buf); | |
524 | } else if (buf[0] == '-' and buf[1] == '.') { | |
525 | printf("-0%s", &buf[1]); | |
526 | } else { | |
527 | printf("%s", buf); | |
528 | } | |
529 | if (index(buf, '.') == nil) { | |
530 | printf(".0"); | |
531 | } | |
532 | } | |
533 | ||
534 | /* | |
535 | * Print out a character using ^? notation for unprintables. | |
536 | */ | |
537 | ||
538 | public printchar(c) | |
539 | char c; | |
540 | { | |
541 | if (c == 0) { | |
542 | putchar('\\'); | |
543 | putchar('0'); | |
544 | } else if (c == '\n') { | |
545 | putchar('\\'); | |
546 | putchar('n'); | |
547 | } else if (c > 0 and c < ' ') { | |
548 | putchar('^'); | |
549 | putchar(c - 1 + 'A'); | |
550 | } else { | |
551 | putchar(c); | |
552 | } | |
553 | } |