]>
Commit | Line | Data |
---|---|---|
885824d3 | 1 | /* |
2 | ** LCLint - annotation-assisted static program checker | |
3 | ** Copyright (C) 1994-2000 University of Virginia, | |
4 | ** Massachusetts Institute of Technology | |
5 | ** | |
6 | ** This program is free software; you can redistribute it and/or modify it | |
7 | ** under the terms of the GNU General Public License as published by the | |
8 | ** Free Software Foundation; either version 2 of the License, or (at your | |
9 | ** option) any later version. | |
10 | ** | |
11 | ** This program is distributed in the hope that it will be useful, but | |
12 | ** WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | ** General Public License for more details. | |
15 | ** | |
16 | ** The GNU General Public License is available from http://www.gnu.org/ or | |
17 | ** the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, | |
18 | ** MA 02111-1307, USA. | |
19 | ** | |
20 | ** For information on lclint: lclint-request@cs.virginia.edu | |
21 | ** To report a bug: lclint-bug@cs.virginia.edu | |
22 | ** For more information: http://lclint.cs.virginia.edu | |
23 | */ | |
24 | /* | |
25 | ** aliasChecks.c | |
26 | */ | |
27 | ||
28 | # include "lclintMacros.nf" | |
29 | # include "basic.h" | |
30 | # include "aliasChecks.h" | |
31 | ||
32 | static void checkStructTransfer (exprNode p_lhs, sRef p_slhs, exprNode p_rhs, sRef p_srhs, | |
33 | fileloc p_loc, transferKind p_tt); | |
34 | static void checkLeaveTrans (uentry p_actual, transferKind p_transferType); | |
35 | static void checkTransfer (exprNode p_fexp, sRef p_fref, | |
36 | exprNode p_texp, sRef p_tref, | |
37 | fileloc p_loc, transferKind p_transferType); | |
38 | static void checkGlobTrans (uentry p_glob, transferKind p_type); | |
39 | ||
40 | static ynm | |
41 | checkCompletelyDefined (exprNode p_fexp, sRef p_fref, | |
42 | exprNode p_texp, sRef p_tref, | |
43 | bool p_topLevel, bool p_inUnion, bool p_directUnion, | |
44 | fileloc p_loc, transferKind p_transferType, int p_depth, | |
45 | bool p_report); | |
46 | ||
47 | static /*@exposed@*/ sRef dependentReference (sRef p_sr); | |
48 | static bool canLoseLocalReference (sRef p_sr, fileloc p_loc) ; | |
49 | ||
50 | /* | |
51 | ** returns the most specific alkind | |
52 | */ | |
53 | ||
54 | alkind alkind_resolve (alkind a1, alkind a2) | |
55 | { | |
56 | if (a1 == AK_UNKNOWN || a1 == AK_ERROR) return a2; | |
57 | if (a2 == AK_UNKNOWN || a2 == AK_ERROR || a2 == AK_LOCAL) return a1; | |
58 | if (a1 == AK_LOCAL) return a2; | |
59 | return a1; | |
60 | } | |
61 | ||
62 | /* | |
63 | ** tref <- fref | |
64 | ** | |
65 | ** transferType: | |
66 | ** FCNRETURN return fref; tref is return type | |
67 | ** GLOBASSIGN tref = fref; | |
68 | ** FCNPASS call (fref) ; tref is the argument type | |
69 | ** | |
70 | */ | |
71 | ||
72 | static /*@only@*/ cstring | |
73 | transferErrorMessage (transferKind transferType, alkind tkind) /*@*/ | |
74 | { | |
75 | switch (transferType) | |
76 | { | |
77 | case TT_FCNRETURN: | |
78 | return (message ("returned as %s", alkind_unparse (tkind))); | |
79 | case TT_DOASSIGN: | |
80 | return (message ("assigned to %s", alkind_unparse (tkind))); | |
81 | case TT_FIELDASSIGN: | |
82 | return (message ("assigned to %s", alkind_unparse (tkind))); | |
83 | case TT_GLOBINIT: | |
84 | return (message ("used as initial value for %s", | |
85 | alkind_unparse (tkind))); | |
86 | case TT_FCNPASS: | |
87 | return (message ("passed as %s param", alkind_unparse (tkind))); | |
88 | BADDEFAULT; | |
89 | } | |
90 | BADEXIT; | |
91 | } | |
92 | ||
93 | static cstring | |
94 | transferErrorExpMessage (transferKind transferType, exkind tkind) /*@*/ | |
95 | { | |
96 | if (exkind_isUnknown (tkind)) | |
97 | { | |
98 | switch (transferType) | |
99 | { | |
100 | case TT_FCNRETURN: | |
101 | return (cstring_makeLiteral ("returned without qualification")); | |
102 | case TT_FIELDASSIGN: | |
103 | case TT_DOASSIGN: | |
104 | return (cstring_makeLiteral ("assigned to unqualified reference")); | |
105 | case TT_FCNPASS: | |
106 | return (cstring_makeLiteral ("passed without qualification")); | |
107 | case TT_GLOBINIT: | |
108 | return (cstring_makeLiteral ("used as initial value for unqualified storage")); | |
109 | BADDEFAULT; | |
110 | } | |
111 | } | |
112 | else | |
113 | { | |
114 | switch (transferType) | |
115 | { | |
116 | case TT_FCNRETURN: | |
117 | return (message ("returned as %s", exkind_unparse (tkind))); | |
118 | case TT_FIELDASSIGN: | |
119 | case TT_DOASSIGN: | |
120 | return (message ("assigned to %s", exkind_unparse (tkind))); | |
121 | case TT_FCNPASS: | |
122 | return (message ("passed as %s param", exkind_unparse (tkind))); | |
123 | BADDEFAULT; | |
124 | } | |
125 | } | |
126 | ||
127 | BADEXIT; | |
128 | } | |
129 | ||
130 | static /*@observer@*/ cstring | |
131 | transferNullMessage (transferKind transferType) /*@*/ | |
132 | { | |
133 | switch (transferType) | |
134 | { | |
135 | case TT_FCNRETURN: | |
136 | return (cstring_makeLiteralTemp ("returned as non-null")); | |
137 | case TT_DOASSIGN: | |
138 | case TT_FIELDASSIGN: | |
139 | return (cstring_makeLiteralTemp ("assigned to non-null")); | |
140 | case TT_GLOBINIT: | |
141 | return (cstring_makeLiteralTemp ("initialized to non-null")); | |
142 | case TT_FCNPASS: | |
143 | return (cstring_makeLiteralTemp ("passed as non-null param")); | |
144 | BADDEFAULT; | |
145 | } | |
146 | BADEXIT; | |
147 | } | |
148 | ||
1ac6313d | 149 | static /*@observer@*/ cstring |
150 | transferNTMessage (transferKind transferType) /*@*/ | |
151 | { | |
152 | switch (transferType) | |
153 | { | |
154 | case TT_FCNRETURN: | |
155 | return (cstring_makeLiteralTemp ("returned as nullterminated")); | |
156 | case TT_DOASSIGN: | |
157 | case TT_FIELDASSIGN: | |
158 | return (cstring_makeLiteralTemp ("assigned to nullterminated")); | |
159 | case TT_GLOBINIT: | |
160 | return (cstring_makeLiteralTemp ("initialized to nullterminated")); | |
161 | case TT_FCNPASS: | |
162 | return (cstring_makeLiteralTemp ("passed as nullterminated param")); | |
163 | BADDEFAULT; | |
164 | } | |
165 | BADEXIT; | |
166 | } | |
167 | ||
885824d3 | 168 | static /*@dependent@*/ exprNode atFunction = exprNode_undefined; |
169 | static int atArgNo = 0; | |
170 | static int atNumArgs = 0; | |
171 | ||
172 | static cstring generateText (exprNode e1, exprNode e2, | |
173 | sRef tref, transferKind tt) | |
174 | /*@*/ | |
175 | { | |
176 | if (tt == TT_DOASSIGN || tt == TT_GLOBINIT) | |
177 | { | |
178 | return (message ("%s = %s", exprNode_unparse (e2), | |
179 | exprNode_unparse (e1))); | |
180 | } | |
181 | else if (tt == TT_FIELDASSIGN) | |
182 | { | |
183 | return (message ("%s = %s (field %q)", | |
184 | exprNode_unparse (e2), | |
185 | exprNode_unparse (e1), | |
186 | sRef_unparse (tref))); | |
187 | } | |
188 | else if (tt == TT_FCNPASS) | |
189 | { | |
190 | return (message ("%s (%s%s%s)", | |
191 | exprNode_unparse (atFunction), | |
192 | (atArgNo == 1 ? cstring_undefined | |
193 | : cstring_makeLiteralTemp ("..., ")), | |
194 | exprNode_unparse (e1), | |
195 | (atArgNo == atNumArgs ? cstring_undefined | |
196 | : cstring_makeLiteralTemp (", ...")))); | |
197 | } | |
198 | else | |
199 | { | |
200 | return (cstring_copy (exprNode_unparse (e1))); | |
201 | } | |
202 | } | |
203 | ||
204 | static /*@observer@*/ cstring | |
205 | transferType_unparse (transferKind transferType) /*@*/ | |
206 | { | |
207 | switch (transferType) | |
208 | { | |
209 | case TT_FCNRETURN: | |
210 | return (cstring_makeLiteralTemp ("Returned")); | |
211 | case TT_DOASSIGN: | |
212 | case TT_FIELDASSIGN: | |
213 | return (cstring_makeLiteralTemp ("Assigned")); | |
214 | case TT_FCNPASS: | |
215 | return (cstring_makeLiteralTemp ("Passed")); | |
216 | case TT_GLOBINIT: | |
217 | return (cstring_makeLiteralTemp ("Initialized")); | |
218 | case TT_GLOBRETURN: | |
219 | return (cstring_makeLiteralTemp ("GLOB RETURN!")); | |
220 | case TT_GLOBPASS: | |
221 | return (cstring_makeLiteralTemp ("GLOB PASS!")); | |
222 | case TT_PARAMRETURN: | |
223 | return (cstring_makeLiteralTemp ("PARAM RETURN!")); | |
224 | case TT_LEAVETRANS: | |
225 | return (cstring_makeLiteralTemp ("LEAVE TRANS!")); | |
226 | BADDEFAULT; | |
227 | } | |
228 | BADEXIT; | |
229 | } | |
230 | ||
231 | static /*@observer@*/ cstring udError (sRef s) | |
232 | { | |
233 | if (sRef_isDead (s)) | |
234 | { | |
235 | return cstring_makeLiteralTemp ("released"); | |
236 | } | |
237 | else if (sRef_isAllocated (s)) | |
238 | { | |
239 | return cstring_makeLiteralTemp ("allocated but not defined"); | |
240 | } | |
241 | else | |
242 | { | |
243 | return cstring_makeLiteralTemp ("undefined"); | |
244 | } | |
245 | } | |
246 | ||
247 | static /*@only@*/ | |
248 | cstring defExpl (sRef s) /*@*/ | |
249 | { | |
250 | sRef rb = sRef_getRootBase (s); | |
251 | ||
252 | if (sRef_sameName (rb, s)) | |
253 | { | |
254 | if (sRef_isAllocated (s)) | |
255 | { | |
256 | return cstring_makeLiteral (" (allocated only)"); | |
257 | } | |
258 | return cstring_undefined; | |
259 | } | |
260 | else | |
261 | { | |
262 | return (message (" (%q is %s)", sRef_unparse (s), udError (s))); | |
263 | } | |
264 | } | |
265 | ||
266 | /* | |
267 | ** returns TRUE if fref is completely defined. | |
268 | ** if !report, returns TRUE unless error is at the deep level. | |
269 | */ | |
270 | ||
271 | static ynm | |
272 | checkCompletelyDefined (exprNode fexp, sRef fref, | |
273 | exprNode texp, sRef tref, | |
274 | bool topLevel, bool inUnion, bool directUnion, | |
275 | fileloc loc, transferKind transferType, | |
276 | int depth, bool report) | |
277 | { | |
278 | ctype ct; | |
279 | alkind fkind = sRef_getAliasKind (fref); | |
280 | alkind tkind = sRef_getAliasKind (tref); | |
281 | ||
282 | if (depth > MAXDEPTH) | |
283 | { | |
284 | llquietbug | |
285 | (message | |
286 | ("Check definition limit exceeded, checking %q. " | |
287 | "This either means there is a variable with at least " | |
288 | "%d indirections apparent in the program text, or " | |
289 | "there is a bug in LCLint.", | |
290 | sRef_unparse (fref), | |
291 | MAXDEPTH)); | |
292 | ||
293 | return YES; | |
294 | } | |
295 | ||
296 | if (!sRef_isKnown (fref)) | |
297 | { | |
298 | return YES; | |
299 | } | |
300 | ||
301 | if (alkind_isStack (fkind)) | |
302 | { | |
303 | ctype rt = ctype_realType (sRef_getType (tref)); | |
304 | ||
305 | if (ctype_isMutable (rt) && !ctype_isSU (rt)) | |
306 | { | |
307 | if (transferType == TT_PARAMRETURN) | |
308 | { | |
309 | if (optgenerror | |
310 | (FLG_RETSTACK, | |
311 | message | |
312 | ("Stack-allocated storage %qreachable from parameter %q", | |
313 | sRef_unparseOpt (fref), | |
314 | sRef_unparse (sRef_getRootBase (fref))), | |
315 | loc)) | |
316 | { | |
317 | sRef_showAliasInfo (fref); | |
318 | } | |
319 | } | |
320 | else if (transferType == TT_GLOBRETURN) | |
321 | { | |
322 | if (optgenerror | |
323 | (FLG_RETSTACK, | |
324 | message | |
325 | ("Stack-allocated storage %qreachable from global %q", | |
326 | sRef_unparseOpt (fref), | |
327 | sRef_unparse (sRef_getRootBase (fref))), | |
328 | loc)) | |
329 | { | |
330 | sRef_showAliasInfo (fref); | |
331 | } | |
332 | } | |
333 | else if (transferType == TT_FCNRETURN) | |
334 | { | |
335 | if (optgenerror | |
336 | (FLG_RETSTACK, | |
337 | message | |
338 | ("Stack-allocated storage %qreachable from return value: %s", | |
339 | sRef_unparseOpt (fref), | |
340 | exprNode_unparse (fexp)), | |
341 | loc)) | |
342 | { | |
343 | sRef_showAliasInfo (fref); | |
344 | } | |
345 | } | |
346 | else | |
347 | { | |
348 | /* no error */ | |
349 | } | |
350 | } | |
351 | } | |
352 | ||
353 | if (!topLevel) | |
354 | { | |
355 | if ((sRef_isObserver (fref) && !sRef_isObserver (tref)) | |
356 | || (sRef_isExposed (fref) && !(sRef_isObserver (tref) | |
357 | || sRef_isExposed (tref)))) | |
358 | { | |
359 | flagcode code = (sRef_isObserver (fref) | |
360 | ? FLG_OBSERVERTRANS : FLG_EXPOSETRANS); | |
361 | ||
362 | if (!sRef_isStateLive (fref)) | |
363 | { | |
364 | ; /* no error (will be a definition error) */ | |
365 | } | |
366 | else if (transferType == TT_DOASSIGN | |
367 | || transferType == TT_FIELDASSIGN | |
368 | || transferType == TT_GLOBINIT | |
369 | || transferType == TT_FCNPASS) | |
370 | { | |
371 | ; /* no error */ | |
372 | } | |
373 | else if (transferType == TT_PARAMRETURN) | |
374 | { | |
375 | if (optgenerror | |
376 | (code, | |
377 | message | |
378 | ("%s storage %qreachable from %s parameter", | |
379 | exkind_capName (sRef_getExKind (fref)), | |
380 | sRef_unparseOpt (fref), | |
381 | exkind_unparseError (sRef_getExKind (tref))), | |
382 | loc)) | |
383 | { | |
384 | sRef_showExpInfo (fref); | |
385 | sRef_setExKind (fref, XO_UNKNOWN, loc); | |
386 | } | |
387 | } | |
388 | else if (transferType == TT_LEAVETRANS) | |
389 | { | |
390 | ; | |
391 | } | |
392 | else if (transferType == TT_GLOBINIT) | |
393 | { | |
394 | if (optgenerror | |
395 | (code, | |
396 | message | |
397 | ("%s storage %qreachable from %s initial value", | |
398 | exkind_capName (sRef_getExKind (fref)), | |
399 | sRef_unparseOpt (fref), | |
400 | exkind_unparseError (sRef_getExKind (tref))), | |
401 | loc)) | |
402 | { | |
403 | sRef_showExpInfo (fref); | |
404 | sRef_setExKind (fref, XO_UNKNOWN, loc); | |
405 | } | |
406 | } | |
407 | else if (transferType == TT_GLOBRETURN) | |
408 | { | |
409 | if (optgenerror | |
410 | (code, | |
411 | message | |
412 | ("%s storage %qreachable from %s global", | |
413 | exkind_capName (sRef_getExKind (fref)), | |
414 | sRef_unparseOpt (fref), | |
415 | exkind_unparseError (sRef_getExKind (tref))), | |
416 | loc)) | |
417 | { | |
418 | sRef_showExpInfo (fref); | |
419 | sRef_setExKind (fref, XO_UNKNOWN, loc); | |
420 | } | |
421 | } | |
422 | else if (transferType == TT_FCNRETURN) | |
423 | { | |
424 | if (optgenerror | |
425 | (code, | |
426 | message | |
427 | ("%s storage %qreachable from %s return value", | |
428 | exkind_capName (sRef_getExKind (fref)), | |
429 | sRef_unparseOpt (fref), | |
430 | exkind_unparseError (sRef_getExKind (tref))), | |
431 | loc)) | |
432 | { | |
433 | sRef_showExpInfo (fref); | |
434 | sRef_setExKind (fref, XO_UNKNOWN, loc); | |
435 | } | |
436 | } | |
437 | else | |
438 | { | |
439 | llcontbug (message ("Transfer type: %s", | |
440 | transferType_unparse (transferType))); | |
441 | ||
442 | if (optgenerror | |
443 | (code, | |
444 | message | |
445 | ("%s storage %qreachable from %s return value", | |
446 | exkind_capName (sRef_getExKind (fref)), | |
447 | sRef_unparseOpt (fref), | |
448 | exkind_unparseError (sRef_getExKind (tref))), | |
449 | loc)) | |
450 | { | |
451 | sRef_showExpInfo (fref); | |
452 | sRef_setExKind (fref, XO_UNKNOWN, loc); | |
453 | } | |
454 | } | |
455 | ||
456 | } | |
457 | ||
458 | if (!alkind_compatible (fkind, tkind)) | |
459 | { | |
460 | if (fkind == AK_UNKNOWN && !sRef_isStateLive (fref)) | |
461 | { | |
462 | ; /* no error (will be a definition error) */ | |
463 | } | |
464 | else if (transferType == TT_DOASSIGN) | |
465 | { | |
466 | ; /* no error */ | |
467 | } | |
468 | else if (transferType == TT_FCNPASS) | |
469 | { | |
470 | if (alkind_isKnown (sRef_getAliasKind (tref))) | |
471 | { | |
472 | if (optgenerror | |
473 | (FLG_COMPMEMPASS, | |
474 | message | |
475 | ("Storage %qreachable from passed parameter " | |
476 | "is %s (should be %s): %s", | |
477 | sRef_unparseOpt (fref), | |
478 | alkind_unparse (sRef_getAliasKind (fref)), | |
479 | alkind_unparse (sRef_getAliasKind (tref)), | |
480 | exprNode_unparse (fexp)), | |
481 | loc)) | |
482 | { | |
483 | sRef_showAliasInfo (fref); | |
484 | } | |
485 | } | |
486 | } | |
487 | else if (transferType == TT_PARAMRETURN) | |
488 | { | |
489 | bool noerror = FALSE; | |
490 | ||
491 | if (alkind_isDependent (sRef_getAliasKind (fref))) | |
492 | { | |
493 | if (canLoseLocalReference (fref, loc)) | |
494 | { | |
495 | noerror = TRUE; | |
496 | } | |
497 | } | |
498 | ||
499 | if (!noerror | |
500 | && optgenerror | |
501 | (FLG_COMPMEMPASS, | |
502 | message | |
503 | ("Storage %qreachable from parameter is %s (should be %s)", | |
504 | sRef_unparseOpt (fref), | |
505 | alkind_unparse (sRef_getAliasKind (fref)), | |
506 | alkind_unparse (sRef_getAliasKind (tref))), | |
507 | loc)) | |
508 | { | |
509 | sRef_showAliasInfo (fref); | |
510 | } | |
511 | } | |
512 | else if (transferType == TT_LEAVETRANS) | |
513 | { | |
514 | if (optgenerror | |
515 | (FLG_COMPMEMPASS, | |
516 | message | |
517 | ("Storage %qreachable from temporary reference is %s " | |
518 | "at scope exit (should be %s)", | |
519 | sRef_unparseOpt (fref), | |
520 | alkind_unparse (sRef_getAliasKind (fref)), | |
521 | alkind_unparse (sRef_getAliasKind (tref))), | |
522 | loc)) | |
523 | { | |
524 | sRef_showAliasInfo (fref); | |
525 | } | |
526 | } | |
527 | else if (transferType == TT_GLOBRETURN) | |
528 | { | |
529 | if (optgenerror | |
530 | (FLG_COMPMEMPASS, | |
531 | message | |
532 | ("Storage %qreachable from global is %s (should be %s)", | |
533 | sRef_unparseOpt (fref), | |
534 | alkind_unparse (sRef_getAliasKind (fref)), | |
535 | alkind_unparse (sRef_getAliasKind (tref))), | |
536 | loc)) | |
537 | { | |
538 | sRef_showAliasInfo (fref); | |
539 | } | |
540 | } | |
541 | else if (transferType == TT_FCNRETURN) | |
542 | { | |
543 | if (optgenerror | |
544 | (FLG_COMPMEMPASS, | |
545 | message | |
546 | ("Storage %qreachable from return value is %s (should be %s)", | |
547 | sRef_unparseOpt (fref), | |
548 | alkind_unparse (sRef_getAliasKind (fref)), | |
549 | alkind_unparse (sRef_getAliasKind (tref))), | |
550 | loc)) | |
551 | { | |
552 | sRef_showAliasInfo (fref); | |
553 | } | |
554 | } | |
555 | else if (transferType == TT_GLOBINIT) | |
556 | { | |
557 | if (optgenerror | |
558 | (FLG_COMPMEMPASS, | |
559 | message | |
560 | ("Storage %qreachable from initial value is %s (should be %s)", | |
561 | sRef_unparseOpt (fref), | |
562 | alkind_unparse (sRef_getAliasKind (fref)), | |
563 | alkind_unparse (sRef_getAliasKind (tref))), | |
564 | loc)) | |
565 | { | |
566 | sRef_showAliasInfo (fref); | |
567 | } | |
568 | } | |
569 | else | |
570 | { | |
571 | llcontbug (message ("Transfer type: %s", | |
572 | transferType_unparse (transferType))); | |
573 | ||
574 | if (optgenerror | |
575 | (FLG_COMPMEMPASS, | |
576 | message | |
577 | ("Storage %qreachable from return value is %s (should be %s)", | |
578 | sRef_unparseOpt (fref), | |
579 | alkind_unparse (sRef_getAliasKind (fref)), | |
580 | alkind_unparse (sRef_getAliasKind (tref))), | |
581 | loc)) | |
582 | { | |
583 | sRef_showAliasInfo (fref); | |
584 | } | |
585 | } | |
586 | } | |
587 | ||
588 | if (sRef_isDead (fref)) | |
589 | { | |
590 | if (directUnion) | |
591 | { | |
592 | return NO; | |
593 | } | |
594 | ||
595 | if (transferType == TT_PARAMRETURN) | |
596 | { | |
597 | if (optgenerror | |
598 | (FLG_USERELEASED, | |
599 | message | |
600 | ("Released storage %q reachable from parameter at return point", | |
601 | sRef_unparse (fref)), | |
602 | loc)) | |
603 | { | |
604 | sRef_showStateInfo (fref); | |
605 | return YES; | |
606 | } | |
607 | } | |
608 | else if (transferType == TT_LEAVETRANS) | |
609 | { | |
610 | if (optgenerror | |
611 | (FLG_USERELEASED, | |
612 | message ("Released storage %q reachable from temporary " | |
613 | "reference at scope exit", | |
614 | sRef_unparse (fref)), | |
615 | loc)) | |
616 | { | |
617 | sRef_showStateInfo (fref); | |
618 | return YES; | |
619 | } | |
620 | } | |
621 | else if (transferType == TT_GLOBRETURN) | |
622 | { | |
623 | if (optgenerror | |
624 | (FLG_GLOBSTATE, | |
625 | message ("Released storage %q reachable from global", | |
626 | sRef_unparse (fref)), | |
627 | loc)) | |
628 | { | |
629 | sRef_showStateInfo (fref); | |
630 | return YES; | |
631 | } | |
632 | } | |
633 | else if (transferType == TT_FCNPASS) | |
634 | { | |
635 | if (optgenerror | |
636 | (FLG_USERELEASED, | |
637 | message ("Released storage %q reachable from passed parameter", | |
638 | sRef_unparse (fref)), | |
639 | loc)) | |
640 | { | |
641 | sRef_showStateInfo (fref); | |
642 | return YES; | |
643 | } | |
644 | } | |
645 | else | |
646 | { | |
647 | if (optgenerror | |
648 | (FLG_USERELEASED, | |
649 | message ("Released storage %q reachable from parameter", | |
650 | sRef_unparse (fref)), | |
651 | loc)) | |
652 | { | |
653 | sRef_showStateInfo (fref); | |
654 | return YES; | |
655 | } | |
656 | } | |
657 | } | |
658 | } | |
659 | ||
660 | if (!topLevel | |
661 | && sRef_possiblyNull (fref) | |
662 | && !sRef_perhapsNull (tref) | |
663 | && ctype_isRealPointer (sRef_getType (tref)) | |
664 | && !usymtab_isGuarded (fref)) | |
665 | { | |
666 | if (transferType == TT_FCNRETURN) | |
667 | { | |
668 | if (optgenerror | |
669 | (FLG_NULLRET, | |
670 | message ("%q storage %qderivable from return value: %s", | |
671 | cstring_capitalize (sRef_nullMessage (fref)), | |
672 | sRef_unparseOpt (fref), | |
673 | exprNode_unparse (fexp)), | |
674 | loc)) | |
675 | { | |
676 | sRef_showNullInfo (fref); | |
677 | sRef_setNullError (fref); | |
678 | } | |
679 | } | |
680 | else if (transferType == TT_GLOBRETURN || transferType == TT_PARAMRETURN) | |
681 | { | |
682 | if (optgenerror | |
683 | (FLG_NULLSTATE, | |
684 | message | |
685 | ("Function returns with %s storage derivable from %q %q", | |
686 | sRef_nullMessage (fref), | |
687 | cstring_makeLiteral ((transferType == TT_GLOBRETURN) | |
688 | ? "global" : "parameter"), | |
689 | sRef_unparse (fref)), | |
690 | loc)) | |
691 | { | |
692 | sRef_showNullInfo (fref); | |
693 | sRef_setNullError (fref); | |
694 | } | |
695 | } | |
696 | else if (transferType == TT_GLOBPASS) | |
697 | { | |
698 | if (optgenerror | |
699 | (FLG_NULLPASS, | |
700 | message ("Function called with %s storage " | |
701 | "derivable from global %q", | |
702 | sRef_nullMessage (fref), | |
703 | sRef_unparse (fref)), | |
704 | loc)) | |
705 | { | |
706 | sRef_showNullInfo (fref); | |
707 | sRef_setNullError (fref); | |
708 | } | |
709 | } | |
710 | else if (transferType == TT_FCNPASS) | |
711 | { | |
712 | if (optgenerror | |
713 | (FLG_NULLSTATE, | |
714 | message ("%q storage %qderivable from parameter %q", | |
715 | cstring_capitalize (sRef_nullMessage (fref)), | |
716 | sRef_unparseOpt (fref), | |
717 | generateText (fexp, exprNode_undefined, | |
718 | sRef_undefined, TT_FCNPASS)), | |
719 | loc)) | |
720 | { | |
721 | sRef_showNullInfo (fref); | |
722 | sRef_setNullError (fref); | |
723 | } | |
724 | } | |
725 | else | |
726 | { | |
727 | llassert (transferType == TT_DOASSIGN | |
728 | || transferType == TT_GLOBINIT | |
729 | || transferType == TT_LEAVETRANS); | |
730 | } | |
731 | } | |
732 | ||
733 | if (sRef_isRelDef (tref) | |
734 | || sRef_isPartial (tref) | |
735 | || sRef_isAllocated (tref) | |
736 | || sRef_isStateSpecial (tref)) | |
737 | { | |
738 | /* should check fref is allocated? */ | |
739 | return YES; | |
740 | } | |
741 | ||
742 | ct = ctype_realType (sRef_getType (fref)); | |
743 | ||
744 | if (!(sRef_isAnyDefined (fref) | |
745 | || sRef_isPdefined (fref) | |
746 | || sRef_isAllocated (fref) | |
747 | || sRef_isStateUnknown (fref))) | |
748 | { | |
749 | if (transferType == TT_GLOBRETURN) | |
750 | { | |
751 | if (report | |
752 | && optgenerror | |
753 | (FLG_COMPDEF, | |
754 | message ("Function returns with global %q not " | |
755 | "completely defined%q", | |
756 | sRef_unparse (sRef_getRootBase (fref)), | |
757 | defExpl (fref)), | |
758 | loc)) | |
759 | { | |
760 | sRef_showStateInfo (fref); | |
761 | sRef_setDefined (fref, loc); | |
762 | } | |
763 | } | |
764 | else if (transferType == TT_GLOBPASS) | |
765 | { | |
766 | if (report && | |
767 | optgenerror | |
768 | (FLG_COMPDEF, | |
769 | message | |
770 | ("Function called with global %q not completely defined%q", | |
771 | sRef_unparse (sRef_getRootBase (fref)), | |
772 | defExpl (fref)), | |
773 | loc)) | |
774 | { | |
775 | sRef_showStateInfo (fref); | |
776 | sRef_setDefined (fref, loc); | |
777 | } | |
778 | } | |
779 | else if (transferType == TT_PARAMRETURN) | |
780 | { | |
781 | if (report && !topLevel | |
782 | && optgenerror | |
783 | (FLG_COMPDEF, | |
784 | message ("Function returns storage %q reachable from parameter not " | |
785 | "completely defined%q", | |
786 | sRef_unparse (sRef_getRootBase (fref)), | |
787 | defExpl (fref)), | |
788 | loc)) | |
789 | { | |
790 | sRef_showStateInfo (fref); | |
791 | sRef_setDefined (fref, loc); | |
792 | } | |
793 | } | |
794 | else if (transferType == TT_LEAVETRANS) | |
795 | { | |
796 | if (report && !topLevel | |
797 | && optgenerror | |
798 | (FLG_COMPDEF, | |
799 | message ("Scope exits with storage %q reachable from " | |
800 | "temporary reference not completely defined%q", | |
801 | sRef_unparse (sRef_getRootBase (fref)), | |
802 | defExpl (fref)), | |
803 | loc)) | |
804 | { | |
805 | sRef_showStateInfo (fref); | |
806 | sRef_setDefined (fref, loc); | |
807 | } | |
808 | } | |
809 | else | |
810 | { | |
811 | if (transferType != TT_DOASSIGN | |
812 | && (!(sRef_isNew (fref) || sRef_isType (fref)))) | |
813 | { | |
814 | if (report) | |
815 | { | |
816 | if (sRef_isDead (fref)) | |
817 | { | |
818 | if (optgenerror | |
819 | (FLG_USERELEASED, | |
820 | message ("%s storage %qwas released: %q", | |
821 | transferType_unparse (transferType), | |
822 | sRef_unparseOpt (fref), | |
823 | generateText (fexp, texp, tref, transferType)), | |
824 | loc)) | |
825 | { | |
826 | sRef_showStateInfo (fref); | |
827 | } | |
828 | } | |
829 | else | |
830 | { | |
831 | if (optgenerror | |
832 | (FLG_COMPDEF, | |
833 | message | |
834 | ("%s storage %qnot completely defined%q: %q", | |
835 | transferType_unparse (transferType), | |
836 | sRef_unparseOpt (sRef_getRootBase (fref)), | |
837 | defExpl (fref), | |
838 | generateText (fexp, texp, tref, transferType)), | |
839 | loc)) | |
840 | { | |
841 | sRef rb = sRef_getRootBase (fref); | |
842 | sRef_showStateInfo (fref); | |
843 | sRef_setDefinedComplete (rb, loc); | |
844 | } | |
845 | } | |
846 | } | |
847 | } | |
848 | else | |
849 | { | |
850 | ||
851 | if (sRef_isAllocated (fref) && sRef_isValid (tref) | |
852 | && (transferType == TT_DOASSIGN)) | |
853 | { | |
854 | sRef_setAllocatedComplete (tref, loc); | |
855 | } | |
856 | return YES; | |
857 | } | |
858 | } | |
859 | ||
860 | return NO; | |
861 | } | |
862 | ||
863 | if (ctype_isUnknown (ct)) | |
864 | { | |
865 | return YES; | |
866 | } | |
867 | else if (ctype_isPointer (ct)) | |
868 | { | |
869 | ctype tct = ctype_realType (sRef_getType (tref)); | |
870 | ||
871 | if (sRef_isStateUnknown (fref)) | |
872 | { | |
873 | return NO; | |
874 | } | |
875 | else | |
876 | { | |
877 | if (ctype_isAP (tct) || ctype_isUnknown (tct)) | |
878 | { | |
879 | sRef fptr = sRef_constructDeref (fref); | |
880 | sRef tptr = sRef_constructDeref (tref); | |
881 | ||
882 | return (checkCompletelyDefined (fexp, fptr, texp, tptr, | |
883 | FALSE, inUnion, FALSE, loc, | |
884 | transferType, depth + 1, report)); | |
885 | } | |
886 | else | |
887 | { | |
888 | return YES; | |
889 | } | |
890 | } | |
891 | } | |
892 | else if (ctype_isArray (ct)) | |
893 | { | |
894 | return YES; | |
895 | } | |
896 | else if (ctype_isStruct (ct)) | |
897 | { | |
898 | ctype tct = ctype_realType (sRef_getType (tref)); | |
899 | ||
900 | if (ctype_match (ct, tct)) | |
901 | { | |
902 | bool isOk = TRUE; | |
903 | bool hasOneDefined = FALSE; | |
904 | cstringSList badFields = cstringSList_undefined; | |
905 | ||
906 | if (sRef_isStateUnknown (fref) || sRef_isAllocated (tref)) | |
907 | { | |
908 | return YES; | |
909 | } | |
910 | ||
911 | if (sRef_isPdefined (fref) || sRef_isAnyDefined (fref)) | |
912 | { | |
913 | sRefSet_realElements (sRef_derivedFields (fref), sr) | |
914 | { | |
915 | bool thisField; | |
916 | ||
917 | hasOneDefined = TRUE; | |
918 | ||
919 | if (sRef_isField (sr)) | |
920 | { | |
921 | cstring fieldname = sRef_getField (sr); | |
922 | sRef fldref = sRef_makeField (tref, fieldname); | |
923 | bool shouldCheck = !sRef_isRecursiveField (fldref); | |
924 | ||
925 | if (shouldCheck) | |
926 | { | |
927 | thisField = | |
928 | ynm_toBoolRelaxed | |
929 | (checkCompletelyDefined (fexp, sr, texp, fldref, | |
930 | FALSE, inUnion, FALSE, loc, | |
931 | transferType, depth + 1, | |
932 | FALSE)); | |
933 | } | |
934 | else | |
935 | { | |
936 | thisField = TRUE; | |
937 | } | |
938 | ||
939 | if (!thisField) | |
940 | { | |
941 | isOk = FALSE; | |
942 | badFields = cstringSList_add (badFields, | |
943 | sRef_getField (sr)); | |
944 | } | |
945 | } | |
946 | } end_sRefSet_realElements; | |
947 | } | |
948 | else if (sRef_isAllocated (fref)) | |
949 | { | |
950 | /* | |
951 | ** for structures, each field must be completely defined | |
952 | */ | |
953 | ||
954 | uentryList fields = ctype_getFields (ct); | |
955 | ||
956 | uentryList_elements (fields, ue) | |
957 | { | |
958 | bool thisField; | |
959 | cstring name = uentry_getRealName (ue); | |
960 | sRef ffield = sRef_makeField (fref, name); | |
961 | sRef tfield = sRef_makeField (tref, name); | |
962 | bool shouldCheck = !sRef_isRecursiveField (tfield); | |
963 | ||
964 | if (!shouldCheck) | |
965 | { | |
966 | thisField = TRUE; | |
967 | } | |
968 | else | |
969 | { | |
970 | thisField = ynm_toBoolRelaxed | |
971 | (checkCompletelyDefined (fexp, ffield, texp, tfield, | |
972 | FALSE, inUnion, FALSE, | |
973 | loc, transferType, | |
974 | depth + 1, FALSE)); | |
975 | } | |
976 | ||
977 | if (!thisField) | |
978 | { | |
979 | isOk = FALSE; | |
980 | badFields = cstringSList_add (badFields, uentry_rawName (ue)); | |
981 | } | |
982 | else | |
983 | { | |
984 | hasOneDefined = TRUE; | |
985 | } | |
986 | } end_uentryList_elements; | |
987 | } | |
988 | else | |
989 | { | |
990 | ; | |
991 | } | |
992 | ||
993 | if (!isOk && (!inUnion || hasOneDefined)) | |
994 | { | |
995 | if (transferType == TT_GLOBRETURN) | |
996 | { | |
997 | if (optgenerror | |
998 | (FLG_COMPDEF, | |
999 | message ("Global storage %q contains %d undefined field%p " | |
1000 | "when call returns: %q", | |
1001 | sRef_unparse (fref), | |
1002 | cstringSList_size (badFields), | |
1003 | cstringSList_unparseAbbrev (badFields)), | |
1004 | loc)) | |
1005 | { | |
1006 | sRef_setDefined (fref, loc); | |
1007 | } | |
1008 | } | |
1009 | else if (transferType == TT_GLOBPASS) | |
1010 | { | |
1011 | if (optgenerror | |
1012 | (FLG_COMPDEF, | |
1013 | message ("Global storage %q contains %d undefined field%p " | |
1014 | "before call: %q", | |
1015 | sRef_unparse (fref), | |
1016 | cstringSList_size (badFields), | |
1017 | cstringSList_unparseAbbrev (badFields)), | |
1018 | loc)) | |
1019 | { | |
1020 | sRef_setDefined (fref, loc); | |
1021 | } | |
1022 | } | |
1023 | else if (transferType == TT_PARAMRETURN) | |
1024 | { | |
1025 | if (optgenerror | |
1026 | (FLG_COMPDEF, | |
1027 | message ("Storage %qreachable from parameter " | |
1028 | "contains %d undefined field%p: %q", | |
1029 | sRef_unparseOpt (fref), | |
1030 | cstringSList_size (badFields), | |
1031 | cstringSList_unparseAbbrev (badFields)), | |
1032 | loc)) | |
1033 | { | |
1034 | sRef_setDefined (fref, loc); | |
1035 | } | |
1036 | } | |
1037 | else if (transferType == TT_LEAVETRANS) | |
1038 | { | |
1039 | /* no error */ | |
1040 | } | |
1041 | else | |
1042 | { | |
1043 | if (optgenerror | |
1044 | (FLG_COMPDEF, | |
1045 | message ("%s storage %qcontains %d undefined field%p: %q", | |
1046 | transferType_unparse (transferType), | |
1047 | sRef_unparseOpt (fref), | |
1048 | cstringSList_size (badFields), | |
1049 | cstringSList_unparseAbbrev (badFields)), | |
1050 | loc)) | |
1051 | { | |
1052 | sRef_setDefined (fref, loc); | |
1053 | } | |
1054 | } | |
1055 | } | |
1056 | ||
1057 | cstringSList_free (badFields); | |
1058 | ||
1059 | if (inUnion) | |
1060 | { | |
1061 | if (directUnion) | |
1062 | { | |
1063 | return (ynm_fromBool (hasOneDefined)); | |
1064 | } | |
1065 | else | |
1066 | { | |
1067 | return (MAYBE); | |
1068 | } | |
1069 | } | |
1070 | else | |
1071 | { | |
1072 | return (ynm_fromBool (!report || isOk)); | |
1073 | } | |
1074 | } | |
1075 | else | |
1076 | { | |
1077 | return YES; | |
1078 | } | |
1079 | } | |
1080 | else if (ctype_isUnion (ct)) | |
1081 | { | |
1082 | if (sRef_isStateUnknown (fref) || sRef_isAllocated (tref)) | |
1083 | { | |
1084 | return YES; | |
1085 | } | |
1086 | else | |
1087 | { | |
1088 | ctype tct = ctype_realType (sRef_getType (tref)); | |
1089 | ||
1090 | if (ctype_isKnown (tct) && ctype_match (ct, tct)) | |
1091 | { | |
1092 | cstringSList goodFields = cstringSList_new (); | |
1093 | bool isOk = FALSE; | |
1094 | int nelements = sRefSet_size (sRef_derivedFields (fref)); | |
1095 | ||
1096 | /* | |
1097 | ** for unions, at least one field must be completely defined | |
1098 | */ | |
1099 | ||
1100 | if (sRef_isPdefined (fref) || sRef_isAnyDefined (fref)) | |
1101 | { | |
1102 | isOk = TRUE; | |
1103 | } | |
1104 | ||
1105 | sRefSet_realElements (sRef_derivedFields (fref), sr) | |
1106 | { | |
1107 | bool thisField; | |
1108 | ||
1109 | if (sRef_isField (sr)) | |
1110 | { | |
1111 | sRef fldref = sRef_makeField (tref, sRef_getField (sr)); | |
1112 | ||
1113 | thisField = ynm_toBoolStrict | |
1114 | (checkCompletelyDefined | |
1115 | (fexp, sr, texp, fldref, FALSE, inUnion, | |
1116 | (nelements > 1 ? TRUE : FALSE), | |
1117 | loc, transferType, depth + 1, FALSE)); | |
1118 | ||
1119 | if (thisField) | |
1120 | { | |
1121 | goodFields = cstringSList_add | |
1122 | (goodFields, sRef_getField (sr)); | |
1123 | } | |
1124 | } | |
1125 | } end_sRefSet_realElements; | |
1126 | ||
1127 | if (cstringSList_empty (goodFields) | |
1128 | && !isOk | |
1129 | && context_getFlag (FLG_UNIONDEF)) | |
1130 | { | |
1131 | if (!inUnion) | |
1132 | { | |
1133 | if (transferType == TT_PARAMRETURN) | |
1134 | { | |
1135 | voptgenerror | |
1136 | (FLG_UNIONDEF, | |
1137 | message ("Union %q reachable from parameter has " | |
1138 | "no defined field", | |
1139 | sRef_unparse (fref)), | |
1140 | loc); | |
1141 | } | |
1142 | else if (transferType == TT_LEAVETRANS) | |
1143 | { | |
1144 | voptgenerror | |
1145 | (FLG_UNIONDEF, | |
1146 | message ("Union %q has no defined field at scope exit", | |
1147 | sRef_unparse (fref)), | |
1148 | loc); | |
1149 | } | |
1150 | else if (transferType == TT_DOASSIGN | |
1151 | || transferType == TT_FIELDASSIGN | |
1152 | || transferType == TT_GLOBINIT) | |
1153 | { | |
1154 | ; /* no error */ | |
1155 | } | |
1156 | else | |
1157 | { | |
1158 | voptgenerror | |
1159 | (FLG_UNIONDEF, | |
1160 | message ("%s union %q has no defined field", | |
1161 | transferType_unparse (transferType), | |
1162 | sRef_unparse (fref)), | |
1163 | loc); | |
1164 | } | |
1165 | } | |
1166 | isOk = FALSE; | |
1167 | } | |
1168 | ||
1169 | cstringSList_free (goodFields); | |
1170 | return ynm_fromBool (!report || isOk); | |
1171 | } | |
1172 | } | |
1173 | } | |
1174 | else | |
1175 | { | |
1176 | ; | |
1177 | } | |
1178 | ||
1179 | return YES; | |
1180 | } | |
1181 | ||
1182 | /* | |
1183 | ** fref is being free'd | |
1184 | */ | |
1185 | ||
1186 | typedef enum { | |
1187 | DSC_GLOB, DSC_LOCAL, DSC_PARAM, DSC_STRUCT | |
1188 | } dscCode; | |
1189 | ||
1190 | static /*@observer@*/ cstring dscCode_unparse (dscCode desc) /*@*/ | |
1191 | { | |
1192 | switch (desc) | |
1193 | { | |
1194 | case DSC_GLOB: | |
1195 | return cstring_makeLiteralTemp ("killed global"); | |
1196 | case DSC_LOCAL: | |
1197 | return cstring_makeLiteralTemp ("variable declared in this scope"); | |
1198 | case DSC_PARAM: | |
1199 | return cstring_makeLiteralTemp ("released storage"); | |
1200 | case DSC_STRUCT: | |
1201 | return cstring_makeLiteralTemp ("released structure parameter"); | |
1202 | } | |
1203 | ||
1204 | BADEXIT; | |
1205 | } | |
1206 | ||
1207 | static bool | |
1208 | checkCompletelyDestroyed (exprNode p_fexp, sRef p_fref, bool p_topLevel, | |
1209 | fileloc p_loc, int p_depth, dscCode p_desc); | |
1210 | ||
1211 | bool checkGlobalDestroyed (sRef fref, fileloc loc) | |
1212 | { | |
1213 | return (checkCompletelyDestroyed (exprNode_undefined, fref, TRUE, | |
1214 | loc, 0, DSC_GLOB)); | |
1215 | } | |
1216 | ||
1217 | void checkLocalDestroyed (sRef fref, fileloc loc) | |
1218 | { | |
1219 | if (sRef_isObserver (fref) || sRef_isExposed (fref) | |
1220 | || sRef_isPartial (fref)) | |
1221 | { | |
1222 | ; | |
1223 | } | |
1224 | else | |
1225 | { | |
1226 | (void) checkCompletelyDestroyed (exprNode_undefined, fref, TRUE, | |
1227 | loc, 0, DSC_LOCAL); | |
1228 | } | |
1229 | } | |
1230 | ||
1231 | void checkStructDestroyed (sRef fref, fileloc loc) | |
1232 | { | |
1233 | if (sRef_isObserver (fref) || sRef_isExposed (fref) | |
1234 | || sRef_isPartial (fref)) | |
1235 | { | |
1236 | ; | |
1237 | } | |
1238 | else | |
1239 | { | |
1240 | (void) checkCompletelyDestroyed (exprNode_undefined, fref, TRUE, loc, 0, DSC_STRUCT); | |
1241 | } | |
1242 | } | |
1243 | ||
1244 | static bool | |
1245 | checkCompletelyDestroyed (exprNode fexp, sRef fref, bool topLevel, | |
1246 | fileloc loc, int depth, | |
1247 | dscCode desc) | |
1248 | { | |
1249 | ctype ct; | |
1250 | ||
1251 | if (depth > MAXDEPTH) | |
1252 | { | |
1253 | llquietbug (message ("checkCompletelyDestroyed: too deep: %s / %q", | |
1254 | exprNode_unparse (fexp), | |
1255 | sRef_unparseFull (fref))); | |
1256 | return TRUE; | |
1257 | } | |
1258 | ||
1259 | if (!sRef_isKnown (fref)) return TRUE; | |
1260 | if (usymtab_isProbableNull (fref)) return TRUE; | |
1261 | if (!context_getFlag (FLG_COMPDESTROY)) return TRUE; | |
1262 | if (!context_getFlag (FLG_MUSTFREE)) return TRUE; | |
1263 | ||
1264 | ct = ctype_realType (sRef_getType (fref)); | |
1265 | ||
1266 | if (!topLevel) | |
1267 | { | |
1268 | bool error = FALSE; | |
1269 | ||
1270 | if (sRef_isFresh (fref) || sRef_isOnly (fref)) | |
1271 | { | |
1272 | error = TRUE; | |
1273 | ||
1274 | if (sRef_isDead (fref) | |
1275 | || sRef_isUnuseable (fref) | |
1276 | || sRef_definitelyNull (fref) | |
1277 | || sRef_isObserver (fref) | |
1278 | || sRef_isExposed (fref)) | |
1279 | { | |
1280 | error = FALSE; | |
1281 | } | |
1282 | } | |
1283 | ||
1284 | if (error) | |
1285 | { | |
1286 | if (sRef_isPossiblyDead (fref) || sRef_isRelDef (fref)) | |
1287 | { | |
1288 | if (exprNode_isDefined (fexp)) | |
1289 | { | |
1290 | voptgenerror2 | |
1291 | (FLG_COMPDESTROY, FLG_STRICTDESTROY, | |
1292 | message ("Only storage %q (type %s) derived from %s " | |
1293 | "may not have been released: %s", | |
1294 | sRef_unparse (fref), | |
1295 | ctype_unparse (sRef_getType (fref)), | |
1296 | dscCode_unparse (desc), | |
1297 | exprNode_unparse (fexp)), | |
1298 | loc); | |
1299 | } | |
1300 | else | |
1301 | { | |
1302 | voptgenerror2 | |
1303 | (FLG_COMPDESTROY, FLG_STRICTDESTROY, | |
1304 | message | |
1305 | ("Only storage %q (type %s) derived from %s " | |
1306 | "may not have been released", | |
1307 | sRef_unparse (fref), | |
1308 | ctype_unparse (sRef_getType (fref)), | |
1309 | dscCode_unparse (desc)), | |
1310 | loc); | |
1311 | } | |
1312 | ||
1313 | sRef_kill (fref, loc); /* prevent further errors */ | |
1314 | } | |
1315 | else | |
1316 | { | |
1317 | if (sRef_isStateUndefined (fref)) | |
1318 | { | |
1319 | return TRUE; | |
1320 | } | |
1321 | else | |
1322 | { | |
1323 | if (exprNode_isDefined (fexp)) | |
1324 | { | |
1325 | voptgenerror | |
1326 | (FLG_COMPDESTROY, | |
1327 | message ("Only storage %q (type %s) derived from %s " | |
1328 | "is not released (memory leak): %s", | |
1329 | sRef_unparse (fref), | |
1330 | ctype_unparse (sRef_getType (fref)), | |
1331 | dscCode_unparse (desc), | |
1332 | exprNode_unparse (fexp)), | |
1333 | loc); | |
1334 | } | |
1335 | else | |
1336 | { | |
1337 | voptgenerror | |
1338 | (FLG_COMPDESTROY, | |
1339 | message ("Only storage %q (type %s) derived from %s " | |
1340 | "is not released (memory leak)", | |
1341 | sRef_unparse (fref), | |
1342 | ctype_unparse (sRef_getType (fref)), | |
1343 | dscCode_unparse (desc)), | |
1344 | loc); | |
1345 | } | |
1346 | } | |
1347 | } | |
1348 | ||
1349 | return FALSE; | |
1350 | } | |
1351 | ||
1352 | if (sRef_isAnyDefined (fref) || sRef_isDead (fref) | |
1353 | || (sRef_isPdefined (fref) | |
1354 | && sRefSet_isEmpty (sRef_derivedFields (fref)))) | |
1355 | { | |
1356 | return TRUE; | |
1357 | } | |
1358 | } | |
1359 | ||
1360 | if (ctype_isPointer (ct)) | |
1361 | { | |
1362 | sRef fptr = sRef_constructDeadDeref (fref); | |
1363 | bool res = checkCompletelyDestroyed (fexp, fptr, FALSE, loc, | |
1364 | depth + 1, desc); | |
1365 | ||
1366 | return res; | |
1367 | } | |
1368 | else if (ctype_isArray (ct)) | |
1369 | { | |
1370 | if ((sRef_isStateUnknown (fref) || sRef_isAllocated (fref)) | |
1371 | && !sRef_hasDerived (fref)) | |
1372 | { | |
1373 | /* | |
1374 | ** Bogosity necessary to prevent infinite depth. | |
1375 | */ | |
1376 | ||
1377 | return FALSE; | |
1378 | } | |
1379 | else | |
1380 | { | |
1381 | sRef farr = sRef_constructDeadDeref (fref); | |
1382 | ||
1383 | return (checkCompletelyDestroyed (fexp, farr, FALSE, loc, | |
1384 | depth + 1, desc)); | |
1385 | } | |
1386 | } | |
1387 | else if (ctype_isStruct (ct)) | |
1388 | { | |
1389 | /* | |
1390 | ** for structures, each field must be completely destroyed | |
1391 | */ | |
1392 | ||
1393 | bool isOk = TRUE; | |
1394 | uentryList fields = ctype_getFields (ct); | |
1395 | ||
1396 | if (depth >= MAXDEPTH) | |
1397 | { | |
1398 | llquietbug (message ("checkCompletelyDestroyed (fields): too deep: %s / %q", | |
1399 | exprNode_unparse (fexp), | |
1400 | sRef_unparseFull (fref))); | |
1401 | ||
1402 | return TRUE; | |
1403 | } | |
1404 | else | |
1405 | { | |
1406 | uentryList_elements (fields, ue) | |
1407 | { | |
1408 | sRef field = sRef_makeField (fref, uentry_rawName (ue)); | |
1409 | ||
1410 | /* | |
1411 | ** note order of && operands --- want to report multiple errors | |
1412 | */ | |
1413 | ||
1414 | isOk = (checkCompletelyDestroyed (fexp, field, FALSE, loc, | |
1415 | depth + 1, desc) | |
1416 | && isOk); | |
1417 | } end_uentryList_elements; | |
1418 | } | |
1419 | ||
1420 | return isOk; | |
1421 | } | |
1422 | else | |
1423 | { | |
1424 | return TRUE; | |
1425 | } | |
1426 | } | |
1427 | ||
1428 | void | |
1429 | checkReturnTransfer (exprNode fexp, uentry rval) | |
1430 | { | |
1431 | sRef uref = uentry_getSref (rval); | |
1432 | sRef rref = sRef_makeNew (sRef_getType (uref), uref, cstring_undefined); | |
1433 | ||
1434 | if (sRef_isStateSpecial (rref)) | |
1435 | { | |
1436 | uentry fcn = context_getHeader (); | |
1437 | sRef fref = exprNode_getSref (fexp); | |
1438 | specialClauses clauses = uentry_getSpecialClauses (fcn); | |
1439 | ||
1440 | specialClauses_postElements (clauses, cl) | |
1441 | { | |
1442 | sRefSet refs = specialClause_getRefs (cl); | |
1443 | sRefTest tst = specialClause_getPostTestFunction (cl); | |
1444 | sRefMod modf = specialClause_getReturnEffectFunction (cl); | |
1445 | ||
1446 | sRefSet_elements (refs, el) | |
1447 | { | |
1448 | sRef base = sRef_getRootBase (el); | |
1449 | ||
1450 | if (sRef_isResult (base)) | |
1451 | { | |
1452 | sRef sr = sRef_fixBase (el, fref); | |
1453 | ||
1454 | if (tst != NULL && !(tst (sr))) | |
1455 | { | |
1456 | if (optgenerror | |
1457 | (specialClause_postErrorCode (cl), | |
1458 | message ("%s storage %q corresponds to " | |
1459 | "storage listed in %q clause: %s", | |
1460 | specialClause_postErrorString (cl, sr), | |
1461 | sRef_unparse (sr), | |
1462 | specialClause_unparseKind (cl), | |
1463 | exprNode_unparse (fexp)), | |
1464 | exprNode_loc (fexp))) | |
1465 | { | |
1466 | sRefShower ss = specialClause_getPostTestShower (cl); | |
1467 | ||
1468 | if (ss != NULL) | |
1469 | { | |
1470 | ss (sr); | |
1471 | } | |
1472 | } | |
1473 | } | |
1474 | ||
1475 | if (modf != NULL) | |
1476 | { | |
1477 | modf (sr, exprNode_loc (fexp)); | |
1478 | } | |
1479 | } | |
1480 | else | |
1481 | { | |
1482 | /* | |
1483 | ** Non-results are checked in exit scope. | |
1484 | */ | |
1485 | } | |
1486 | } end_sRefSet_elements ; | |
1487 | } end_specialClauses_postElements ; | |
1488 | ||
1489 | (void) checkTransfer (fexp, fref, | |
1490 | exprNode_undefined, rref, | |
1491 | exprNode_loc (fexp), TT_FCNRETURN); | |
1492 | } | |
1493 | else | |
1494 | { | |
1495 | if (ctype_isRealSU (exprNode_getType (fexp))) | |
1496 | { | |
1497 | sRef fref = exprNode_getSref (fexp); | |
1498 | ||
1499 | checkStructTransfer (exprNode_undefined, rref, | |
1500 | fexp, fref, | |
1501 | exprNode_loc (fexp), | |
1502 | TT_FCNRETURN); | |
1503 | } | |
1504 | else | |
1505 | { | |
1506 | (void) checkTransfer (fexp, exprNode_getSref (fexp), | |
1507 | exprNode_undefined, rref, | |
1508 | exprNode_loc (fexp), TT_FCNRETURN); | |
1509 | } | |
1510 | } | |
1511 | } | |
1512 | ||
1513 | static void | |
1514 | checkPassSpecialClauses (uentry ue, exprNode fexp, sRef fref, int argno) | |
1515 | { | |
1516 | specialClauses clauses = uentry_getSpecialClauses (ue); | |
1517 | ||
1518 | DPRINTF (("Check pass special: %s / %s", | |
1519 | exprNode_unparse (fexp), sRef_unparseFull (fref))); | |
1520 | ||
1521 | specialClauses_preElements (clauses, cl) | |
1522 | { | |
1523 | sRefSet refs = specialClause_getRefs (cl); | |
1524 | sRefTest tst = specialClause_getPreTestFunction (cl); | |
1525 | sRefMod modf = specialClause_getEffectFunction (cl); | |
1526 | ||
1527 | sRefSet_elements (refs, el) | |
1528 | { | |
1529 | sRef base = sRef_getRootBase (el); | |
1530 | ||
1531 | if (sRef_isResult (base)) | |
1532 | { | |
1533 | ; /* nothing to check before */ | |
1534 | } | |
1535 | else if (sRef_isParam (base)) | |
1536 | { | |
1537 | if (sRef_getParam (base) == argno - 1) | |
1538 | { | |
1539 | sRef sb; | |
1540 | ||
1541 | DPRINTF (("Fix base: %s / %s", | |
1542 | sRef_unparseFull (el), | |
1543 | sRef_unparseFull (fref))); | |
1544 | ||
1545 | sb = sRef_fixBase (el, fref); | |
1546 | ||
1547 | if (tst != NULL && !(tst(sb))) | |
1548 | { | |
1549 | voptgenerror | |
1550 | (specialClause_preErrorCode (cl), | |
1551 | message ("%s storage %qcorresponds to " | |
1552 | "storage listed in %q clause of " | |
1553 | "called function: %s", | |
1554 | specialClause_preErrorString (cl, sb), | |
1555 | sRef_unparseOpt (sb), | |
1556 | specialClause_unparseKind (cl), | |
1557 | exprNode_unparse (fexp)), | |
1558 | exprNode_loc (fexp)); | |
1559 | } | |
1560 | ||
1561 | if (modf != NULL) | |
1562 | { | |
1563 | DPRINTF (("Fixing: %s", sRef_unparseFull (sb))); | |
1564 | modf (sb, exprNode_loc (fexp)); | |
1565 | DPRINTF (("==> %s", sRef_unparseFull (sb))); | |
1566 | } | |
1567 | } | |
1568 | } | |
1569 | else | |
1570 | { | |
1571 | BADBRANCH; | |
1572 | } | |
1573 | } end_sRefSet_elements ; | |
1574 | } end_specialClauses_preElements ; | |
1575 | ||
1576 | DPRINTF (("After: %s", sRef_unparseFull (fref))); | |
1577 | } | |
1578 | ||
1579 | /* | |
1580 | ** should not modify arg | |
1581 | */ | |
1582 | ||
1583 | void | |
1584 | checkPassTransfer (exprNode fexp, uentry arg, bool isSpec, | |
1585 | /*@dependent@*/ exprNode fcn, int argno, int totargs) | |
1586 | { | |
1587 | sRef tref = uentry_getSref (arg); | |
1588 | sRef fref = exprNode_getSref (fexp); | |
1589 | bool isOut = FALSE; | |
1590 | bool isPartial = FALSE; | |
1591 | bool isImpOut = FALSE; | |
1592 | ctype ct = uentry_getType (arg); | |
1593 | ||
1594 | DPRINTF (("Check pass: %s -> %s", | |
1595 | sRef_unparseFull (fref), | |
1596 | sRef_unparseFull (tref))); | |
1597 | ||
1598 | atFunction = fcn; | |
1599 | atArgNo = argno; | |
1600 | atNumArgs = totargs; | |
1601 | ||
1602 | if (ctype_isElips (ct)) | |
1603 | { | |
1604 | ct = ctype_unknown; | |
1605 | } | |
1606 | ||
1607 | if (!ctype_isElips (ct) && | |
1608 | (ctype_isVoidPointer (ct) && uentry_isOut (arg) && sRef_isOnly (tref))) | |
1609 | { | |
1610 | if (ctype_isRealAP (ct)) | |
1611 | { | |
1612 | if (sRef_aliasCheckSimplePred (sRef_isDead, fref)) | |
1613 | { | |
1614 | if (optgenerror | |
1615 | (FLG_USERELEASED, | |
1616 | message ("Dead storage %qpassed as out parameter: %s", | |
1617 | sRef_unparseOpt (fref), | |
1618 | exprNode_unparse (fexp)), | |
1619 | exprNode_loc (fexp))) | |
1620 | { | |
1621 | if (sRef_isDead (fref)) | |
1622 | { | |
1623 | sRef_showStateInfo (fref); | |
1624 | } | |
1625 | } | |
1626 | ||
1627 | sRef_setAllocated (fref, exprNode_loc (fexp)); | |
1628 | } | |
1629 | else if (context_getFlag (FLG_STRICTUSERELEASED) | |
1630 | && sRef_aliasCheckSimplePred (sRef_isPossiblyDead, fref)) | |
1631 | { | |
1632 | if (optgenerror2 | |
1633 | (FLG_USERELEASED, FLG_STRICTUSERELEASED, | |
1634 | message ("Possibly dead storage %qpassed as out parameter: %s", | |
1635 | sRef_unparseOpt (fref), | |
1636 | exprNode_unparse (fexp)), | |
1637 | exprNode_loc (fexp))) | |
1638 | { | |
1639 | if (sRef_isPossiblyDead (fref)) | |
1640 | { | |
1641 | sRef_showStateInfo (fref); | |
1642 | } | |
1643 | } | |
1644 | ||
1645 | sRef_setAllocated (fref, exprNode_loc (fexp)); | |
1646 | } | |
1647 | else if (sRef_aliasCheckSimplePred (sRef_isStateUndefined, fref) | |
1648 | || sRef_aliasCheckSimplePred (sRef_isUnuseable, fref)) | |
1649 | { | |
1650 | voptgenerror | |
1651 | (FLG_USEDEF, | |
1652 | message ("Unallocated storage %qpassed as out parameter: %s", | |
1653 | sRef_unparseOpt (fref), | |
1654 | exprNode_unparse (fexp)), | |
1655 | exprNode_loc (fexp)); | |
1656 | ||
1657 | sRef_setAllocated (fref, exprNode_loc (fexp)); | |
1658 | } | |
1659 | else | |
1660 | { | |
1661 | ; | |
1662 | } | |
1663 | } | |
1664 | ||
1665 | (void) checkCompletelyDestroyed (fexp, fref, TRUE, exprNode_loc (fexp), | |
1666 | 0, DSC_PARAM); | |
1667 | ||
1668 | /* make it defined now, so checkTransfer is okay */ | |
1669 | sRef_setDefined (fref, exprNode_loc (fexp)); | |
1670 | } | |
1671 | else if (uentry_isOut (arg)) | |
1672 | { | |
1673 | if (ctype_isRealAP (ct) | |
1674 | && (sRef_isStateUndefined (fref) || sRef_isUnuseable (fref))) | |
1675 | { | |
1676 | voptgenerror | |
1677 | (FLG_USEDEF, | |
1678 | message ("Unallocated storage %qpassed as out parameter: %s", | |
1679 | sRef_unparseOpt (fref), | |
1680 | exprNode_unparse (fexp)), | |
1681 | exprNode_loc (fexp)); | |
1682 | sRef_setAllocated (fref, exprNode_loc (fexp)); | |
1683 | } | |
1684 | isOut = TRUE; | |
1685 | } | |
1686 | else if (uentry_isPartial (arg)) | |
1687 | { | |
1688 | if (ctype_isRealAP (ct) | |
1689 | && (sRef_isStateUndefined (fref) || sRef_isUnuseable (fref))) | |
1690 | { | |
1691 | voptgenerror | |
1692 | (FLG_USEDEF, | |
1693 | message ("Unallocated storage %qpassed as partial parameter: %s", | |
1694 | sRef_unparseOpt (fref), | |
1695 | exprNode_unparse (fexp)), | |
1696 | exprNode_loc (fexp)); | |
1697 | sRef_setAllocated (fref, exprNode_loc (fexp)); | |
1698 | } | |
1699 | isPartial = TRUE; | |
1700 | } | |
1701 | else if (uentry_isStateSpecial (arg)) | |
1702 | { | |
1703 | uentry ue = exprNode_getUentry (fcn); | |
1704 | ||
1705 | if (ctype_isRealAP (ct) | |
1706 | && (sRef_isStateUndefined (fref) || sRef_isUnuseable (fref))) | |
1707 | { | |
1708 | voptgenerror | |
1709 | (FLG_USEDEF, | |
1710 | message ("Unallocated storage %qpassed as special parameter: %s", | |
1711 | sRef_unparseOpt (fref), | |
1712 | exprNode_unparse (fexp)), | |
1713 | exprNode_loc (fexp)); | |
1714 | sRef_setAllocated (fref, exprNode_loc (fexp)); | |
1715 | } | |
1716 | ||
1717 | if (uentry_hasSpecialClauses (ue)) | |
1718 | { | |
1719 | checkPassSpecialClauses (ue, fexp, fref, argno); | |
1720 | } | |
1721 | ||
1722 | return; /* ??? */ | |
1723 | } | |
1724 | else if (sRef_isStateDefined (tref)) | |
1725 | { | |
1726 | exprNode_checkUseParam (fexp); | |
1727 | } | |
1728 | else | |
1729 | { | |
1730 | if (isSpec || (!context_getFlag (FLG_IMPOUTS))) | |
1731 | { | |
1732 | exprNode_checkUseParam (fexp); | |
1733 | } | |
1734 | else | |
1735 | { | |
1736 | if (!sRef_isMacroParamRef (fref) | |
1737 | && (ctype_isRealAP (ct))) | |
1738 | { | |
1739 | if (sRef_isAddress (fref)) | |
1740 | { | |
1741 | if (sRef_isStateUndefined (fref) || sRef_isUnuseable (fref)) | |
1742 | { | |
1743 | voptgenerror | |
1744 | (FLG_USEDEF, | |
1745 | message | |
1746 | ("Unallocated address %qpassed as implicit " | |
1747 | "out parameter: %s", | |
1748 | sRef_unparseOpt (fref), | |
1749 | exprNode_unparse (fexp)), | |
1750 | exprNode_loc (fexp)); | |
1751 | sRef_setAllocated (fref, exprNode_loc (fexp)); | |
1752 | } | |
1753 | } | |
1754 | ||
1755 | /* yes, I really mean this! */ | |
1756 | tref = sRef_copy (tref); | |
1757 | sRef_setAllocated (tref, exprNode_loc (fexp)); | |
1758 | ||
1759 | isOut = TRUE; | |
1760 | isImpOut = TRUE; | |
1761 | } | |
1762 | else | |
1763 | { | |
1764 | exprNode_checkUseParam (fexp); | |
1765 | } | |
1766 | } | |
1767 | } | |
1768 | ||
1769 | if (sRef_isNew (fref)) | |
1770 | { | |
1771 | alkind tkind = sRef_getAliasKind (tref); | |
1772 | ||
1773 | if ((sRef_isFresh (fref) || sRef_isOnly (fref)) | |
1774 | && !alkind_isOnly (tkind) | |
1775 | && !alkind_isKeep (tkind) | |
1776 | && !alkind_isOwned (tkind) | |
1777 | && !alkind_isError (tkind) | |
1778 | && !uentry_isReturned (arg)) | |
1779 | ||
1780 | { | |
1781 | voptgenerror | |
1782 | (FLG_MUSTFREE, | |
1783 | message ("New fresh storage %qpassed as %s (not released): %s", | |
1784 | sRef_unparseOpt (fref), | |
1785 | alkind_unparse (sRef_getAliasKind (tref)), | |
1786 | exprNode_unparse (fexp)), | |
1787 | exprNode_loc (fexp)); | |
1788 | } | |
1789 | else | |
1790 | { | |
1791 | if (sRef_isNewRef (fref) && !sRef_isKillRef (tref)) | |
1792 | { | |
1793 | alkind ak = sRef_getAliasKind (tref); | |
1794 | ||
1795 | if (!alkind_isError (ak)) | |
1796 | { | |
1797 | voptgenerror | |
1798 | (FLG_MUSTFREE, | |
1799 | message ("New reference %qpassed as %s (not released): %s", | |
1800 | sRef_unparseOpt (fref), | |
1801 | alkind_unparse (sRef_getAliasKind (tref)), | |
1802 | exprNode_unparse (fexp)), | |
1803 | exprNode_loc (fexp)); | |
1804 | } | |
1805 | } | |
1806 | } | |
1807 | } | |
1808 | ||
1809 | (void) checkTransfer (fexp, exprNode_getSref (fexp), | |
1810 | exprNode_undefined, tref, | |
1811 | exprNode_loc (fexp), TT_FCNPASS); | |
1812 | ||
1813 | setCodePoint (); | |
1814 | fref = exprNode_getSref (fexp); | |
1815 | ||
1816 | if (isOut && !sRef_isDead (fref) && !sRef_isPossiblyDead (fref)) | |
1817 | { | |
1818 | sRef base; | |
1819 | ||
1820 | if (ctype_isRealAP (sRef_getType (fref))) | |
1821 | { | |
1822 | base = sRef_makePointer (fref); | |
1823 | } | |
1824 | else | |
1825 | { | |
1826 | base = fref; | |
1827 | } | |
1828 | ||
1829 | if (isImpOut) | |
1830 | { | |
1831 | exprNode_checkMSet (fexp, base); | |
1832 | } | |
1833 | else | |
1834 | { | |
1835 | exprNode_checkSet (fexp, base); | |
1836 | } | |
1837 | ||
1838 | if (sRef_isValid (base)) | |
1839 | { | |
1840 | setCodePoint (); | |
1841 | ||
1842 | sRef_clearDerived (base); | |
1843 | sRef_setDefined (base, exprNode_loc (fexp)); | |
1844 | usymtab_clearAlias (base); | |
1845 | sRef_setNullUnknown (base, exprNode_loc (fexp)); | |
1846 | } | |
1847 | } | |
1848 | ||
1849 | if (isPartial) | |
1850 | { | |
1851 | if (sRef_isValid (fref)) | |
1852 | { | |
1853 | sRef_setPartial (fref, exprNode_loc (fexp)); | |
1854 | } | |
1855 | } | |
1856 | ||
1857 | atFunction = exprNode_undefined; | |
1858 | atArgNo = 0; | |
1859 | atNumArgs = 0; | |
1860 | ||
1861 | /* need to fixup here: derived refs could be bogus */ | |
1862 | /* (better to change sRef to not add derivs for "protected" ref) */ | |
1863 | ||
1864 | uentry_fixupSref (arg); | |
1865 | ||
1866 | setCodePoint (); | |
1867 | ||
1868 | DPRINTF (("Check pass: ==> %s", | |
1869 | sRef_unparseFull (fref))); | |
1870 | } | |
1871 | ||
1872 | void | |
1873 | checkGlobReturn (uentry glob) | |
1874 | { | |
1875 | sRef_protectDerivs (); | |
1876 | checkGlobTrans (glob, TT_GLOBRETURN); | |
1877 | sRef_clearProtectDerivs (); | |
1878 | } | |
1879 | ||
1880 | void checkParamReturn (uentry actual) | |
1881 | { | |
1882 | checkLeaveTrans (actual, TT_PARAMRETURN); | |
1883 | } | |
1884 | ||
1885 | void checkLoseRef (uentry actual) | |
1886 | { | |
1887 | checkLeaveTrans (actual, TT_LEAVETRANS); | |
1888 | } | |
1889 | ||
1890 | static void | |
1891 | checkLeaveTrans (uentry actual, transferKind transferType) | |
1892 | { | |
1893 | sRef aref = uentry_getSref (actual); | |
1894 | sRef origref = uentry_getOrigSref (actual); | |
1895 | ||
1896 | if (transferType == TT_PARAMRETURN | |
1897 | && (sRef_isKeep (origref) || sRef_isOnly (origref) | |
1898 | || sRef_isOwned (origref))) | |
1899 | { | |
1900 | /* caller cannot use, nothing to check */ | |
1901 | } | |
1902 | else | |
1903 | { | |
1904 | if (sRef_isNSLocalVar (origref)) | |
1905 | { | |
1906 | ; | |
1907 | } | |
1908 | else | |
1909 | { | |
1910 | (void) checkCompletelyDefined (exprNode_undefined, aref, | |
1911 | exprNode_undefined, origref, | |
1912 | TRUE, FALSE, FALSE, | |
1913 | g_currentloc, transferType, | |
1914 | 0, TRUE); | |
1915 | } | |
1916 | } | |
1917 | } | |
1918 | ||
1919 | static void | |
1920 | checkGlobTrans (uentry glob, transferKind type) | |
1921 | { | |
1922 | sRef eref = uentry_getOrigSref (glob); | |
1923 | ||
1924 | (void) checkCompletelyDefined (exprNode_undefined, uentry_getSref (glob), | |
1925 | exprNode_undefined, eref, | |
1926 | TRUE, FALSE, FALSE, | |
1927 | g_currentloc, type, 0, TRUE); | |
1928 | } | |
1929 | ||
1930 | /* | |
1931 | ** For lhs of assignment, alias kind is set from basic type. | |
1932 | ** Yoikes! | |
1933 | */ | |
1934 | ||
1935 | static void | |
1936 | fixAssignLhs (sRef s) | |
1937 | { | |
1938 | sRef_resetStateComplete (s); | |
1939 | } | |
1940 | ||
1941 | static void checkStructTransfer (exprNode lhs, sRef slhs, exprNode rhs, sRef srhs, | |
1942 | fileloc loc, | |
1943 | transferKind tt) | |
1944 | { | |
1945 | ctype st = ctype_realType (sRef_getType (srhs)); | |
1946 | ||
1947 | if (ctype_isSU (st) && ctype_isRealSU (sRef_getType (slhs)) | |
1948 | && ctype_match (sRef_getType (slhs), st)) | |
1949 | { | |
1950 | if (tt == TT_DOASSIGN && sRef_isStateDefined (srhs)) | |
1951 | { | |
1952 | sRef_setDefinedComplete (slhs, loc); | |
1953 | } | |
1954 | ||
1955 | if (sRef_isDependent (slhs) | |
1956 | || sRef_isObserver (slhs) | |
1957 | || sRef_isExposed (slhs)) | |
1958 | { | |
1959 | ; | |
1960 | } | |
1961 | else | |
1962 | { | |
1963 | if (sRef_isLocalVar (slhs) | |
1964 | && sRef_isGlobal (sRef_getRootBase (srhs))) | |
1965 | { | |
1966 | sRef_setDependent (slhs, exprNode_loc (lhs)); | |
1967 | } | |
1968 | else | |
1969 | { | |
1970 | if (ctype_isUnion (st)) | |
1971 | { | |
1972 | sRef_setDefState (slhs, sRef_getDefState (srhs), | |
1973 | exprNode_loc (lhs)); | |
1974 | ||
1975 | sRefSet_realElements (sRef_derivedFields (srhs), sr) | |
1976 | { | |
1977 | if (sRef_isField (sr)) | |
1978 | { | |
1979 | cstring fieldname = sRef_getField (sr); | |
1980 | sRef lfld = sRef_makeField (slhs, fieldname); | |
1981 | ||
1982 | (void) checkTransfer (rhs, sr, lhs, lfld, | |
1983 | exprNode_loc (lhs), tt); | |
1984 | } | |
1985 | } end_sRefSet_realElements ; | |
1986 | } | |
1987 | else | |
1988 | { | |
1989 | uentryList fields = ctype_getFields (st); | |
1990 | ||
1991 | uentryList_elements (fields, field) | |
1992 | { | |
1993 | sRef rfld = sRef_makeField (srhs, uentry_rawName (field)); | |
1994 | sRef lfld = sRef_makeField (slhs, uentry_rawName (field)); | |
1995 | (void) checkTransfer (rhs, rfld, lhs, lfld, exprNode_loc (lhs), tt); | |
1996 | } end_uentryList_elements ; | |
1997 | } | |
1998 | ||
1999 | if (sRef_isOnly (srhs)) | |
2000 | { | |
2001 | sRef_setKeptComplete (srhs, loc); | |
2002 | } | |
2003 | } | |
2004 | } | |
2005 | } | |
2006 | } | |
2007 | ||
2008 | void | |
2009 | checkInitTransfer (exprNode lhs, exprNode rhs) | |
2010 | { | |
2011 | sRef slhs = exprNode_getSref (lhs); | |
2012 | ||
2013 | if (sRef_isGlobal (slhs) || (!sRef_isCvar (slhs))) | |
2014 | { | |
2015 | (void) checkTransfer (rhs, exprNode_getSref (rhs), | |
2016 | lhs, slhs, exprNode_loc (rhs), TT_GLOBINIT); | |
2017 | } | |
2018 | else | |
2019 | { | |
2020 | checkAssignTransfer (lhs, rhs); | |
2021 | } | |
2022 | } | |
2023 | ||
2024 | void | |
2025 | checkAssignTransfer (exprNode lhs, exprNode rhs) | |
2026 | { | |
2027 | sRef slhs = exprNode_getSref (lhs); | |
2028 | sRef srhs = exprNode_getSref (rhs); | |
2029 | sRef base = sRef_getBaseSafe (slhs); | |
2030 | nstate ns; | |
1ac6313d | 2031 | struct _bbufinfo bs; |
885824d3 | 2032 | |
2033 | DPRINTF (("Check assign: %s = %s", exprNode_unparse (lhs), | |
2034 | exprNode_unparse (rhs))); | |
2035 | DPRINTF (("lhs: %s", sRef_unparseFull (slhs))); | |
2036 | DPRINTF (("rhs: %s", sRef_unparseFull (srhs))); | |
2037 | ||
2038 | if (ctype_isRealSU (sRef_getType (srhs))) | |
2039 | { | |
2040 | checkStructTransfer (lhs, slhs, rhs, srhs, exprNode_loc (lhs), TT_FIELDASSIGN); | |
2041 | } | |
2042 | else | |
2043 | { | |
2044 | (void) checkTransfer (rhs, srhs, lhs, slhs, | |
2045 | exprNode_loc (lhs), TT_DOASSIGN); | |
2046 | } | |
2047 | ||
2048 | if (sRef_isConst (srhs) && sRef_isLocalState (srhs)) | |
2049 | { | |
2050 | /* constants can match anything (e.g., NULL) */ | |
2051 | sRef_setAliasKind (slhs, AK_ERROR, fileloc_undefined); | |
2052 | } | |
2053 | ||
2054 | if (sRef_isValid (base) && sRef_isStateDefined (base)) | |
2055 | { | |
2056 | sRef_setPdefined (base, g_currentloc); | |
2057 | } | |
2058 | ||
2059 | if (sRef_isPartial (srhs)) | |
2060 | { | |
2061 | sRef_setPartial (slhs, exprNode_loc (rhs)); | |
2062 | } | |
2063 | ||
2064 | ||
2065 | ns = sRef_getNullState (srhs); | |
2066 | ||
2067 | if (nstate_possiblyNull (ns)) | |
2068 | { | |
2069 | if (usymtab_isGuarded (srhs)) | |
2070 | { | |
2071 | ns = NS_NOTNULL; | |
2072 | } | |
2073 | } | |
2074 | ||
2075 | sRef_setNullStateInnerComplete (slhs, ns, exprNode_loc (rhs)); | |
2076 | ||
2077 | if (sRef_isExposed (srhs) || sRef_isObserver (srhs)) | |
2078 | { | |
2079 | sRef_setExKind (slhs, sRef_getExKind (srhs), exprNode_loc (rhs)); | |
2080 | } | |
2081 | ||
1ac6313d | 2082 | /* We put the function to transfer NT states */ |
2083 | bs = sRef_getNullTerminatedState (srhs); | |
2084 | sRef_setNullTerminatedStateInnerComplete (slhs, bs, exprNode_loc (rhs)); | |
885824d3 | 2085 | DPRINTF (("Done transfer: %s", sRef_unparseFull (slhs))); |
2086 | } | |
2087 | ||
2088 | static void | |
2089 | checkTransferNullAux (sRef fref, exprNode fexp, /*@unused@*/ bool ffix, | |
2090 | sRef tref, exprNode texp, /*@unused@*/ bool tfix, | |
2091 | fileloc loc, transferKind transferType) | |
2092 | { | |
2093 | alkind tkind = sRef_getAliasKind (tref); | |
2094 | ctype ttyp = ctype_realType (sRef_getType (tref)); | |
2095 | ||
2096 | if (ctype_isUnknown (ttyp)) | |
2097 | { | |
2098 | ttyp = exprNode_getType (texp); | |
2099 | ||
2100 | if (ctype_isUnknown (ttyp)) | |
2101 | { | |
2102 | ttyp = exprNode_getType (fexp); | |
2103 | ||
2104 | if (ctype_isUnknown (ttyp)) | |
2105 | { | |
2106 | ttyp = sRef_getType (fref); | |
2107 | } | |
2108 | } | |
2109 | } | |
2110 | ||
2111 | if (ctype_isFunction (ttyp) && (transferType == TT_FCNRETURN)) | |
2112 | { | |
2113 | ttyp = ctype_returnValue (ttyp); | |
2114 | } | |
2115 | ||
2116 | /* | |
2117 | ** check for null (don't need to check aliases??) | |
2118 | */ | |
2119 | ||
2120 | if (sRef_possiblyNull (fref) | |
2121 | && !usymtab_isGuarded (fref) | |
2122 | && ctype_isRealAP (ttyp)) | |
2123 | { | |
2124 | if (!alkind_isLocal (tkind) && !alkind_isFresh (tkind) | |
2125 | && !sRef_perhapsNull (tref) | |
2126 | && !(transferType == TT_DOASSIGN)) | |
2127 | { | |
2128 | if (transferType == TT_GLOBINIT) | |
2129 | { | |
2130 | if (optgenerror | |
2131 | (FLG_NULLASSIGN, | |
2132 | message ("%s %q initialized to %s value: %q", | |
2133 | sRef_getScopeName (tref), | |
2134 | sRef_unparse (tref), | |
2135 | sRef_nullMessage (fref), | |
2136 | generateText (fexp, texp, tref, transferType)), | |
2137 | loc)) | |
2138 | { | |
2139 | sRef_showNullInfo (fref); | |
2140 | sRef_setNullError (tref); | |
2141 | } | |
2142 | } | |
2143 | else | |
2144 | { | |
2145 | if (optgenerror | |
2146 | ((transferType == TT_FCNPASS) ? FLG_NULLPASS : FLG_NULLRET, | |
2147 | message ("%q storage %q%s: %q", | |
2148 | cstring_capitalize (sRef_nullMessage (fref)), | |
2149 | sRef_unparseOpt (fref), | |
2150 | transferNullMessage (transferType), | |
2151 | generateText (fexp, texp, tref, transferType)), | |
2152 | loc)) | |
2153 | { | |
2154 | sRef_showNullInfo (fref); | |
2155 | sRef_setNullError (fref); | |
2156 | } | |
2157 | } | |
2158 | } | |
2159 | else | |
2160 | { | |
2161 | ; | |
2162 | } | |
2163 | } | |
2164 | } | |
2165 | ||
2166 | ||
2167 | static void | |
2168 | checkTransferAssignAux (sRef fref, exprNode fexp, /*@unused@*/ bool ffix, | |
2169 | sRef tref, exprNode texp, bool tfix, | |
2170 | fileloc loc, transferKind transferType) | |
2171 | { | |
2172 | alkind tkind = sRef_getAliasKind (tref); | |
2173 | ||
2174 | /* | |
2175 | ** Assignment to same --- no errors, or state changes. | |
2176 | ** This can happen when returned params are used. | |
2177 | */ | |
2178 | ||
2179 | if (sRef_sameName (fref, tref)) | |
2180 | { | |
2181 | sRef_copyState (tref, fref); | |
2182 | return; | |
2183 | } | |
2184 | ||
2185 | if ((alkind_isOnly (tkind) || alkind_isFresh (tkind) | |
2186 | || alkind_isNewRef (tkind) || alkind_isOwned (tkind)) | |
2187 | && !(sRef_isDead (tref) | |
2188 | || sRef_isStateUndefined (tref) | |
2189 | || sRef_isUnuseable (tref) | |
2190 | || sRef_isPartial (tref) | |
2191 | || sRef_definitelyNull (tref) | |
2192 | || sRef_isStackAllocated (tref) | |
2193 | || sRef_isAllocIndexRef (tref)) | |
2194 | && !(sRef_same (fref, tref)) /* okay to assign to self (returned params) */ | |
2195 | && !(usymtab_isProbableNull (tref))) | |
2196 | { | |
2197 | if (context_getFlag (FLG_MUSTFREE)) | |
2198 | { | |
2199 | if (canLoseReference (tref, loc)) | |
2200 | { | |
2201 | ; /* no error */ | |
2202 | } | |
2203 | else | |
2204 | { | |
2205 | if (sRef_hasLastReference (tref)) | |
2206 | { | |
2207 | if (optgenerror | |
2208 | (FLG_MUSTFREE, | |
2209 | message ("Last reference %q to %s storage %qnot released " | |
2210 | "before assignment: %q", | |
2211 | sRef_unparse (tref), | |
2212 | alkind_unparse (tkind), | |
2213 | sRef_unparseOpt (sRef_getAliasInfoRef (tref)), | |
2214 | generateText (fexp, texp, tref, transferType)), | |
2215 | loc)) | |
2216 | { | |
2217 | sRef_showRefLost (tref); | |
2218 | } | |
2219 | } | |
2220 | else | |
2221 | { | |
2222 | if (context_inGlobalScope ()) | |
2223 | { | |
2224 | /* no errors for static initializations */ | |
2225 | } | |
2226 | else | |
2227 | { | |
2228 | /* | |
2229 | ** don't report this error for a[i], since it could | |
2230 | ** be a new element. | |
2231 | */ | |
2232 | ||
2233 | if (alkind_isNewRef (tkind)) | |
2234 | { | |
2235 | if (optgenerror | |
2236 | (FLG_MUSTFREE, | |
2237 | message | |
2238 | ("%q %qnot released before assignment: %q", | |
2239 | cstring_makeLiteral | |
2240 | (alkind_isKillRef (sRef_getOrigAliasKind (tref)) | |
2241 | ? "Kill reference parameter" : "New reference"), | |
2242 | sRef_unparseOpt (tref), | |
2243 | generateText (fexp, texp, tref, transferType)), | |
2244 | loc)) | |
2245 | { | |
2246 | sRef_showAliasInfo (tref); | |
2247 | sRef_setAliasKind (tref, AK_ERROR, loc); | |
2248 | } | |
2249 | } | |
2250 | else if | |
2251 | (!(sRef_isUnknownArrayFetch (tref) | |
2252 | && !context_getFlag (FLG_STRICTDESTROY)) | |
2253 | && !sRef_isUnionField (tref) | |
2254 | && !sRef_isRelDef (tref) | |
2255 | && optgenerror | |
2256 | (FLG_MUSTFREE, | |
2257 | message | |
2258 | ("%s storage %qnot released before assignment: %q", | |
2259 | alkind_capName (tkind), | |
2260 | sRef_unparseOpt (tref), | |
2261 | generateText (fexp, texp, tref, transferType)), | |
2262 | loc)) | |
2263 | { | |
2264 | sRef_showAliasInfo (tref); | |
2265 | } | |
2266 | else | |
2267 | { | |
2268 | ; | |
2269 | } | |
2270 | } | |
2271 | } | |
2272 | } | |
2273 | } | |
2274 | } | |
2275 | ||
2276 | fixAssignLhs (tref); | |
2277 | ||
2278 | if (sRef_isRefCounted (tref)) /* tkind might not be correct now */ | |
2279 | { | |
2280 | if (sRef_isNewRef (fref)) | |
2281 | { | |
2282 | sRef_setAliasKind (tref, AK_NEWREF, loc); | |
2283 | } | |
2284 | else if (sRef_isConst (fref)) | |
2285 | { | |
2286 | /* for now, constants are not ref counted */ | |
2287 | sRef_setAliasKind (tref, AK_ERROR, loc); | |
2288 | } | |
2289 | else | |
2290 | { | |
2291 | ; | |
2292 | } | |
2293 | ||
2294 | if (!sRef_isNSLocalVar (tref) | |
2295 | && sRef_isRefCounted (fref) | |
2296 | && sRef_isStateDefined (fref)) | |
2297 | { | |
2298 | voptgenerror | |
2299 | (FLG_NEWREFTRANS, | |
2300 | message ("New reference %qto reference counted storage: %q", | |
2301 | sRef_unparseOpt (tref), | |
2302 | generateText (fexp, texp, tref, transferType)), | |
2303 | loc); | |
2304 | } | |
2305 | } | |
2306 | ||
2307 | /* | |
2308 | ** Not for structures and unions, since assignments copy. | |
2309 | */ | |
2310 | ||
2311 | if (sRef_isStack (fref) | |
2312 | && !ctype_isSU (ctype_realType (sRef_getType (fref)))) | |
2313 | { | |
2314 | sRef_setAliasKindComplete (tref, AK_STACK, loc); | |
2315 | } | |
2316 | ||
2317 | if (sRef_isNSLocalVar (tref) | |
2318 | && !sRef_isOwned (tref) /*< should only apply to static >*/ | |
2319 | && ctype_isMutable (sRef_getType (tref))) | |
2320 | { | |
2321 | if (sRef_isOnly (fref) && sRef_isNew (fref)) | |
2322 | { | |
2323 | if (!tfix) | |
2324 | { | |
2325 | sRef_setFresh (tref, loc); | |
2326 | } | |
2327 | } | |
2328 | } | |
2329 | } | |
2330 | ||
2331 | /* | |
2332 | ** requires sRef_isOnly (fref) | |
2333 | */ | |
2334 | ||
2335 | static void | |
2336 | checkOnlyTransferAux (sRef fref, exprNode fexp, bool ffix, | |
2337 | sRef tref, exprNode texp, /*@unused@*/ bool tfix, | |
2338 | fileloc loc, transferKind transferType) | |
2339 | { | |
2340 | alkind tkind = sRef_getAliasKind (tref); | |
2341 | ||
2342 | if (sRef_isExposed (tref) || sRef_isObserver (tref)) | |
2343 | { | |
2344 | if (transferType == TT_FCNRETURN && sRef_isNew (fref) | |
2345 | && !alkind_isError (tkind)) | |
2346 | { | |
2347 | if (optgenerror | |
2348 | (FLG_ONLYTRANS, | |
2349 | message ("Only storage %q%q (will not be released): %q", | |
2350 | sRef_unparseOpt (fref), | |
2351 | transferErrorMessage (transferType, tkind), | |
2352 | generateText (fexp, texp, tref, transferType)), | |
2353 | loc)) | |
2354 | { | |
2355 | sRef_showAliasInfo (fref); | |
2356 | } | |
2357 | } | |
2358 | ||
2359 | /* no errors for exposed transfers (is this good enough?) */ | |
2360 | } | |
2361 | else if (alkind_isOnly (tkind) || alkind_isKeep (tkind) || alkind_isOwned (tkind)) | |
2362 | { | |
2363 | ; /* okay */ | |
2364 | } | |
2365 | else if ((transferType == TT_FCNPASS) | |
2366 | && (alkind_isUnknown (tkind) | |
2367 | || alkind_isTemp (tkind) || alkind_isUnique (tkind))) | |
2368 | { | |
2369 | if (sRef_isFresh (fref) | |
2370 | && alkind_isUnknown (tkind) && !context_getFlag (FLG_PASSUNKNOWN)) | |
2371 | { | |
2372 | if (!ffix) sRef_setAliasKind (fref, AK_UNKNOWN, loc); | |
2373 | } | |
2374 | } | |
2375 | else if (alkind_isLocal (tkind) | |
2376 | || alkind_isFresh (tkind) || alkind_isUnknown (tkind)) | |
2377 | { | |
2378 | if ((transferType == TT_DOASSIGN) | |
2379 | && sRef_isNew (fref) | |
2380 | && sRef_isOnly (fref)) | |
2381 | { | |
2382 | bool error = FALSE; | |
2383 | ||
2384 | if (alkind_isUnknown (tkind) | |
2385 | && sRef_isGlobal (sRef_getRootBase (tref))) | |
2386 | { | |
2387 | if (optgenerror | |
2388 | (FLG_ONLYUNQGLOBALTRANS, | |
2389 | message ("Only storage %q%q: %q", | |
2390 | sRef_unparseOpt (fref), | |
2391 | transferErrorMessage (transferType, tkind), | |
2392 | generateText (fexp, texp, tref, transferType)), | |
2393 | loc)) | |
2394 | { | |
2395 | sRef_showAliasInfo (fref); | |
2396 | sRef_setAliasKind (tref, AK_ERROR, loc); | |
2397 | error = TRUE; | |
2398 | } | |
2399 | } | |
2400 | ||
2401 | if (!error && !ffix) | |
2402 | { | |
2403 | sRef_setFresh (tref, loc); | |
2404 | } | |
2405 | } | |
2406 | else | |
2407 | { | |
2408 | if (alkind_isLocal (tkind)) | |
2409 | { | |
2410 | if (sRef_sameName (tref, fref)) | |
2411 | { | |
2412 | ; /* don't set this --- corresponds to return transfer */ | |
2413 | } | |
2414 | else | |
2415 | { | |
2416 | /* | |
2417 | ** Don't set local to dependent. Error will | |
2418 | ** be detected through aliasing. Except for | |
2419 | ** arrays. | |
2420 | */ | |
2421 | ||
2422 | if (!tfix && sRef_isThroughArrayFetch (fref) | |
2423 | && context_getFlag (FLG_DEPARRAYS)) | |
2424 | { | |
2425 | sRef_setDependent (tref, loc); | |
2426 | } | |
2427 | } | |
2428 | } | |
2429 | else | |
2430 | { | |
2431 | if (optgenerror | |
2432 | (FLG_ONLYTRANS, | |
2433 | message ("Only storage %q%q: %q", | |
2434 | sRef_unparseOpt (fref), | |
2435 | transferErrorMessage (transferType, tkind), | |
2436 | generateText (fexp, texp, tref, transferType)), | |
2437 | loc)) | |
2438 | { | |
2439 | sRef_showAliasInfo (fref); | |
2440 | } | |
2441 | } | |
2442 | } | |
2443 | } | |
2444 | else | |
2445 | { | |
2446 | if (alkind_isError (tkind) | |
2447 | || (alkind_isUnknown (tkind) && !context_getFlag (FLG_MEMIMPLICIT))) | |
2448 | { | |
2449 | flagcode_recordSuppressed (FLG_ONLYTRANS); | |
2450 | } | |
2451 | else | |
2452 | { | |
2453 | if ((alkind_isKept (tkind) || alkind_isStack (tkind) | |
2454 | || alkind_isDependent (tkind)) | |
2455 | && sRef_isNSLocalVar (tref)) | |
2456 | { | |
2457 | ; /* okay */ | |
2458 | } | |
2459 | else | |
2460 | { | |
2461 | if (optgenerror | |
2462 | (FLG_ONLYTRANS, | |
2463 | message ("Only storage %q%q: %q", | |
2464 | sRef_unparseOpt (fref), | |
2465 | transferErrorMessage (transferType, tkind), | |
2466 | generateText (fexp, texp, tref, transferType)), | |
2467 | loc)) | |
2468 | { | |
2469 | sRef_showAliasInfo (fref); | |
2470 | } | |
2471 | } | |
2472 | } | |
2473 | ||
2474 | if (transferType == TT_DOASSIGN) | |
2475 | { | |
2476 | /* | |
2477 | ** alias kind unknown to suppress future messages | |
2478 | */ | |
2479 | ||
2480 | if (!ffix && sRef_isNSLocalVar (sRef_getRootBase (fref))) | |
2481 | { | |
2482 | sRef_clearAliasKind (fref); | |
2483 | } | |
2484 | } | |
2485 | } | |
2486 | } | |
2487 | ||
2488 | /* | |
2489 | ** ??? same as checkOnly ? | |
2490 | */ | |
2491 | ||
2492 | static void | |
2493 | checkOwnedTransferAux (sRef fref, exprNode fexp, bool ffix, | |
2494 | sRef tref, exprNode texp, bool tfix, | |
2495 | fileloc loc, transferKind transferType) | |
2496 | { | |
2497 | alkind tkind = sRef_getAliasKind (tref); | |
2498 | ||
2499 | if (sRef_isExposed (tref) || sRef_isObserver (tref)) | |
2500 | { | |
2501 | if (transferType == TT_FCNRETURN && sRef_isNew (fref)) | |
2502 | { | |
2503 | if (optgenerror | |
2504 | (FLG_OWNEDTRANS, | |
2505 | message ("Owned storage %q%q (will not be released): %q", | |
2506 | sRef_unparseOpt (fref), | |
2507 | transferErrorMessage (transferType, tkind), | |
2508 | generateText (fexp, texp, tref, transferType)), | |
2509 | loc)) | |
2510 | { | |
2511 | sRef_showAliasInfo (fref); | |
2512 | } | |
2513 | } | |
2514 | } | |
2515 | else if (alkind_isOnly (tkind) || alkind_isKeep (tkind) | |
2516 | || alkind_isDependent (tkind) | |
2517 | || alkind_isOwned (tkind)) | |
2518 | { | |
2519 | /* okay */ | |
2520 | } | |
2521 | else if (alkind_isLocal (tkind) | |
2522 | || alkind_isFresh (tkind) || alkind_isUnknown (tkind)) | |
2523 | { | |
2524 | if ((transferType == TT_DOASSIGN) | |
2525 | && sRef_isNew (fref) && sRef_isOnly (fref)) | |
2526 | { | |
2527 | if (!tfix) | |
2528 | { | |
2529 | sRef_setFresh (tref, loc); | |
2530 | } | |
2531 | } | |
2532 | else | |
2533 | { | |
2534 | } | |
2535 | } | |
2536 | else if ((transferType == TT_FCNPASS) | |
2537 | && (alkind_isUnknown (tkind) | |
2538 | || alkind_isTemp (tkind) || alkind_isUnique (tkind))) | |
2539 | { | |
2540 | if (sRef_isFresh (fref) | |
2541 | && alkind_isUnknown (tkind) && !context_getFlag (FLG_PASSUNKNOWN)) | |
2542 | { | |
2543 | if (!ffix) { sRef_clearAliasKind (fref); } | |
2544 | } | |
2545 | } | |
2546 | else | |
2547 | { | |
2548 | if (alkind_isUnknown (tkind) && !context_getFlag (FLG_MEMIMPLICIT)) | |
2549 | { | |
2550 | flagcode_recordSuppressed (FLG_OWNEDTRANS); | |
2551 | } | |
2552 | else | |
2553 | { | |
2554 | if (alkind_isKept (tkind) && sRef_isNSLocalVar (tref)) | |
2555 | { | |
2556 | ; /* okay */ | |
2557 | } | |
2558 | else | |
2559 | { | |
2560 | voptgenerror | |
2561 | (FLG_OWNEDTRANS, | |
2562 | message ("Owned storage %q%q: %q", | |
2563 | sRef_unparseOpt (fref), | |
2564 | transferErrorMessage (transferType, tkind), | |
2565 | generateText (fexp, texp, tref, transferType)), | |
2566 | loc); | |
2567 | } | |
2568 | } | |
2569 | ||
2570 | if (transferType == TT_DOASSIGN) | |
2571 | { | |
2572 | /* | |
2573 | ** alias kind unknown to suppress future messages | |
2574 | */ | |
2575 | ||
2576 | if (!ffix) { sRef_clearAliasKind (fref); } | |
2577 | } | |
2578 | } | |
2579 | } | |
2580 | ||
2581 | static void | |
2582 | checkFreshTransferAux (sRef fref, exprNode fexp, bool ffix, | |
2583 | sRef tref, exprNode texp, /*@unused@*/ bool tfix, | |
2584 | fileloc loc, transferKind transferType) | |
2585 | { | |
2586 | alkind tkind = sRef_getAliasKind (tref); | |
2587 | ||
2588 | /* | |
2589 | ** error to return fresh as non-only | |
2590 | */ | |
2591 | ||
2592 | if (transferType == TT_FCNRETURN | |
2593 | && !(alkind_isOnly (tkind) || alkind_isNewRef (tkind))) | |
2594 | { | |
2595 | if (alkind_isUnknown (tkind) && !context_getFlag (FLG_MEMIMPLICIT)) | |
2596 | { | |
2597 | flagcode_recordSuppressed (FLG_NEWREFTRANS); | |
2598 | } | |
2599 | else | |
2600 | { | |
2601 | if (alkind_isError (tkind)) | |
2602 | { | |
2603 | if (!ffix) | |
2604 | { | |
2605 | sRef_killComplete (fref, loc); | |
2606 | } | |
2607 | } | |
2608 | else if (alkind_isRefCounted (tkind)) | |
2609 | { | |
2610 | if (optgenerror | |
2611 | (FLG_NEWREFTRANS, | |
2612 | message | |
2613 | ("New reference returned without newref qualifier: %q", | |
2614 | generateText (fexp, texp, tref, transferType)), | |
2615 | loc)) | |
2616 | { | |
2617 | sRef_showAliasInfo (fref); | |
2618 | sRef_killComplete (fref, loc); | |
2619 | } | |
2620 | } | |
2621 | else | |
2622 | { | |
2623 | if (optgenerror | |
2624 | (FLG_FRESHTRANS, | |
2625 | message ("Fresh storage %q (should be only): %q", | |
2626 | transferErrorMessage (transferType, tkind), | |
2627 | generateText (fexp, texp, tref, transferType)), | |
2628 | loc)) | |
2629 | { | |
2630 | sRef_showAliasInfo (fref); | |
2631 | sRef_killComplete (fref, loc); | |
2632 | } | |
2633 | } | |
2634 | } | |
2635 | } | |
2636 | ||
2637 | /* | |
2638 | ** Okay to assign fresh to only, shared or unqualified. | |
2639 | ** | |
2640 | ** should generate other errors? | |
2641 | */ | |
2642 | ||
2643 | if (alkind_isOnly (tkind)) | |
2644 | { | |
2645 | if (transferType == TT_DOASSIGN && !sRef_isGlobal (tref)) | |
2646 | { | |
2647 | if (!ffix) | |
2648 | { | |
2649 | if (!sRef_isNSLocalVar (tref)) | |
2650 | { | |
2651 | sRef_setKeptComplete (fref, loc); | |
2652 | } | |
2653 | } | |
2654 | } | |
2655 | else | |
2656 | { | |
2657 | if (sRef_isConst (fref)) | |
2658 | { | |
2659 | ; | |
2660 | } | |
2661 | else | |
2662 | { | |
2663 | if (!ffix) | |
2664 | { | |
2665 | sRef_killComplete (fref, loc); | |
2666 | } | |
2667 | } | |
2668 | } | |
2669 | } | |
2670 | else if (alkind_isOwned (tkind)) | |
2671 | { | |
2672 | if (!ffix) | |
2673 | { | |
2674 | sRef_setDependentComplete (fref, loc); | |
2675 | } | |
2676 | } | |
2677 | else if (alkind_isRefCounted (tkind) | |
2678 | && (transferType == TT_FCNRETURN) && sRef_isFresh (fref)) | |
2679 | { | |
2680 | if (!ffix) | |
2681 | { | |
2682 | sRef_killComplete (fref, loc); | |
2683 | } | |
2684 | } | |
2685 | else if (alkind_isKeep (tkind)) | |
2686 | { | |
2687 | if (!ffix) | |
2688 | { | |
2689 | if (!sRef_isNSLocalVar (tref)) | |
2690 | { | |
2691 | sRef_setKeptComplete (fref, loc); | |
2692 | } | |
2693 | } | |
2694 | } | |
2695 | else if (alkind_isShared (tkind)) | |
2696 | { | |
2697 | if (!ffix) { sRef_setShared (fref, loc); } | |
2698 | } | |
2699 | else if (alkind_isLocal (tkind) || alkind_isUnknown (tkind)) | |
2700 | { | |
2701 | if (transferType == TT_DOASSIGN || transferType == TT_FCNRETURN) | |
2702 | { | |
2703 | /* | |
2704 | ** local shares fresh. Make it owned/dependent. | |
2705 | */ | |
2706 | ||
2707 | if (!tfix) | |
2708 | { | |
2709 | sRef_setOwned (tref, loc); | |
2710 | } | |
2711 | ||
2712 | if (!ffix && !tfix) | |
2713 | { | |
2714 | sRef_setDependentComplete (fref, loc); | |
2715 | } | |
2716 | ||
2717 | /* NO! sRef_clearAliasKind (fref); */ | |
2718 | } | |
2719 | else | |
2720 | { | |
2721 | if (context_getFlag (FLG_PASSUNKNOWN)) | |
2722 | { | |
2723 | sRef_clearAliasKind (fref); | |
2724 | } | |
2725 | } | |
2726 | } | |
2727 | else | |
2728 | { | |
2729 | ; | |
2730 | } | |
2731 | } | |
2732 | ||
2733 | static void | |
2734 | checkTransferExposure (sRef fref, exprNode fexp, /*@unused@*/ bool ffix, | |
2735 | sRef tref, exprNode texp, bool tfix, | |
2736 | fileloc loc, | |
2737 | transferKind transferType) | |
2738 | { | |
2739 | alkind fkind = sRef_getAliasKind (fref); | |
2740 | alkind tkind = sRef_getAliasKind (tref); | |
2741 | exkind tekind = sRef_getExKind (tref); | |
2742 | ||
2743 | if (sRef_isObserver (fref) && ctype_isMutable (sRef_getType (fref))) | |
2744 | { | |
2745 | /* | |
2746 | ** observer -> exposed or observer | |
2747 | */ | |
2748 | ||
2749 | /* | |
2750 | ** observer -> temp is okay [NO! really? only in function calls] | |
2751 | */ | |
2752 | ||
2753 | if (sRef_isExposed (tref) || sRef_isObserver (tref) | |
2754 | || alkind_isLocal (tkind)) | |
2755 | { | |
2756 | /* okay */ | |
2757 | ||
2758 | if ((transferType == TT_DOASSIGN) && alkind_isLocal (tkind)) | |
2759 | { | |
2760 | if (!tfix) { sRef_setAliasKindComplete (tref, fkind, loc); } | |
2761 | } | |
2762 | } | |
2763 | else | |
2764 | { | |
2765 | if (transferType == TT_FCNRETURN | |
2766 | || transferType == TT_DOASSIGN | |
2767 | || transferType == TT_FIELDASSIGN | |
2768 | || transferType == TT_GLOBINIT) | |
2769 | { | |
2770 | bool hasError = FALSE; | |
2771 | ||
2772 | if (exprNode_isStringLiteral (fexp) | |
2773 | && transferType == TT_GLOBINIT) | |
2774 | { | |
2775 | hasError = optgenerror | |
2776 | (FLG_READONLYTRANS, | |
2777 | message ("Read-only string literal storage %q%q: %q", | |
2778 | sRef_unparseOpt (fref), | |
2779 | transferErrorExpMessage (transferType, tekind), | |
2780 | generateText (fexp, texp, tref, transferType)), | |
2781 | loc); | |
2782 | ||
2783 | sRef_setAliasKind (fref, AK_ERROR, fileloc_undefined); | |
2784 | } | |
2785 | else | |
2786 | { | |
2787 | if ((transferType == TT_DOASSIGN | |
2788 | || transferType == TT_FIELDASSIGN) | |
2789 | && (sRef_isNSLocalVar (tref) | |
2790 | || (exprNode_isStringLiteral (fexp) | |
2791 | && ctype_isRealArray (exprNode_getType (texp))))) | |
2792 | { | |
2793 | ; /* No error for local assignment or assignment | |
2794 | to static array (copies string). */ | |
2795 | } | |
2796 | else | |
2797 | { | |
2798 | if (exprNode_isStringLiteral (fexp)) | |
2799 | { | |
2800 | hasError = optgenerror | |
2801 | (FLG_READONLYTRANS, | |
2802 | message | |
2803 | ("Read-only string literal storage %q%q: %q", | |
2804 | sRef_unparseOpt (fref), | |
2805 | transferErrorExpMessage (transferType, tekind), | |
2806 | generateText (fexp, texp, tref, transferType)), | |
2807 | loc); | |
2808 | ||
2809 | } | |
2810 | ||
2811 | if (!hasError) | |
2812 | { | |
2813 | hasError = optgenerror | |
2814 | (FLG_OBSERVERTRANS, | |
2815 | message | |
2816 | ("Observer storage %q%q: %q", | |
2817 | sRef_unparseOpt (fref), | |
2818 | transferErrorExpMessage (transferType, tekind), | |
2819 | generateText (fexp, texp, tref, transferType)), | |
2820 | loc); | |
2821 | } | |
2822 | } | |
2823 | } | |
2824 | ||
2825 | if (hasError) | |
2826 | { | |
2827 | if (transferType != TT_GLOBINIT) | |
2828 | { | |
2829 | sRef_showExpInfo (fref); | |
2830 | sRef_setAliasKind (tref, AK_ERROR, loc); | |
2831 | } | |
2832 | } | |
2833 | else | |
2834 | { | |
2835 | if (transferType == TT_DOASSIGN && !tfix) | |
2836 | { | |
2837 | DPRINTF (("Setting unknown!")); | |
2838 | /* sRef_setAliasKind (tref, AK_ERROR, loc); */ | |
2839 | } | |
2840 | } | |
2841 | } | |
2842 | else /* TT_FCNPASS */ | |
2843 | { | |
2844 | llassert (transferType == TT_FCNPASS); | |
2845 | ||
2846 | if (alkind_isTemp (tkind) | |
2847 | || alkind_isDependent (tkind) | |
2848 | || alkind_isRefCounted (tkind)) | |
2849 | { | |
2850 | ; /* okay */ | |
2851 | } | |
2852 | else | |
2853 | { | |
2854 | if (!alkind_isError (tkind)) | |
2855 | { | |
2856 | if (optgenerror | |
2857 | (FLG_OBSERVERTRANS, | |
2858 | message ("Observer storage %q%q: %q", | |
2859 | sRef_unparseOpt (fref), | |
2860 | transferErrorMessage (transferType, tkind), | |
2861 | generateText (fexp, texp, tref, transferType)), | |
2862 | loc)) | |
2863 | { | |
2864 | sRef_showExpInfo (fref); | |
2865 | sRef_clearAliasState (fref, loc); | |
2866 | } | |
2867 | } | |
2868 | } | |
2869 | } | |
2870 | } | |
2871 | } | |
2872 | else if (sRef_isExposed (fref) && ctype_isMutable (sRef_getType (fref))) | |
2873 | { | |
2874 | if (transferType == TT_FCNRETURN) | |
2875 | { | |
2876 | if (!(sRef_isExposed (tref) || sRef_isObserver (tref) | |
2877 | || sRef_isParam (fref))) | |
2878 | { | |
2879 | if (optgenerror | |
2880 | (FLG_EXPOSETRANS, | |
2881 | message ("Exposed storage %q%q: %q", | |
2882 | sRef_unparseOpt (fref), | |
2883 | transferErrorExpMessage (transferType, tekind), | |
2884 | generateText (fexp, texp, tref, transferType)), | |
2885 | loc)) | |
2886 | { | |
2887 | sRef_showExpInfo (fref); | |
2888 | } | |
2889 | } | |
2890 | } | |
2891 | else if (transferType == TT_FCNPASS) | |
2892 | { | |
2893 | if (!(sRef_isExposed (tref) | |
2894 | || sRef_isObserver (tref) | |
2895 | || (alkind_isUnknown (tkind) | |
2896 | || alkind_isDependent (tkind) | |
2897 | || alkind_isTemp (tkind) | |
2898 | || alkind_isKillRef (tkind) | |
2899 | || alkind_isRefCounted (tkind)))) | |
2900 | { | |
2901 | if (alkind_isUnique (tkind) || alkind_isError (tkind)) | |
2902 | { | |
2903 | } | |
2904 | else | |
2905 | { | |
2906 | if (optgenerror | |
2907 | (FLG_EXPOSETRANS, | |
2908 | message ("Exposed storage %q%q: %q", | |
2909 | sRef_unparseOpt (fref), | |
2910 | transferErrorMessage (transferType, tkind), | |
2911 | generateText (fexp, texp, tref, transferType)), | |
2912 | loc)) | |
2913 | { | |
2914 | sRef_showExpInfo (fref); | |
2915 | sRef_clearAliasState (fref, loc); | |
2916 | } | |
2917 | } | |
2918 | ||
2919 | } | |
2920 | else | |
2921 | { | |
2922 | ; | |
2923 | } | |
2924 | } | |
2925 | else if (transferType == TT_DOASSIGN) | |
2926 | { | |
2927 | if (!(sRef_isExposed (tref) | |
2928 | || !sRef_isCvar (tref) | |
2929 | || (alkind_isUnknown (tkind) | |
2930 | || alkind_isDependent (tkind) | |
2931 | || alkind_isRefCounted (tkind) | |
2932 | || alkind_isNewRef (tkind) | |
2933 | || alkind_isFresh (tkind) | |
2934 | || alkind_isLocal (tkind)))) | |
2935 | { | |
2936 | if (optgenerror | |
2937 | (FLG_EXPOSETRANS, | |
2938 | message ("Exposed storage %q%q: %q", | |
2939 | sRef_unparseOpt (fref), | |
2940 | transferErrorExpMessage (transferType, tekind), | |
2941 | generateText (fexp, texp, tref, transferType)), | |
2942 | loc)) | |
2943 | { | |
2944 | sRef_showExpInfo (fref); | |
2945 | } | |
2946 | } | |
2947 | if (!tfix) { sRef_setExposed (tref, loc); } | |
2948 | } | |
2949 | else | |
2950 | { | |
2951 | llassert (transferType == TT_GLOBPASS | |
2952 | || transferType == TT_GLOBRETURN | |
2953 | || transferType == TT_PARAMRETURN | |
2954 | || transferType == TT_LEAVETRANS | |
2955 | || transferType == TT_GLOBINIT); | |
2956 | } | |
2957 | } | |
2958 | else | |
2959 | { | |
2960 | ; | |
2961 | } | |
2962 | } | |
2963 | ||
2964 | /* | |
2965 | ** returns TRUE if there is no error reported | |
2966 | ** | |
2967 | ** if fixt, don't change tref (except if error reported.) | |
2968 | ** if fixf, don't change fref (except if error reported.) | |
2969 | */ | |
2970 | ||
2971 | static void | |
2972 | checkTransferAux (exprNode fexp, sRef fref, bool ffix, | |
2973 | exprNode texp, sRef tref, bool tfix, | |
2974 | fileloc loc, transferKind transferType) | |
2975 | { | |
2976 | alkind fkind; | |
2977 | alkind tkind; | |
2978 | bool isassign = (transferType == TT_DOASSIGN); | |
2979 | bool isfieldassign = (transferType == TT_FIELDASSIGN); | |
2980 | bool iseitherassign = isassign || (transferType == TT_FIELDASSIGN); | |
2981 | bool isfcnpass = (transferType == TT_FCNPASS); | |
2982 | bool isfcnreturn = (transferType == TT_FCNRETURN); | |
2983 | ||
2984 | setCodePoint (); | |
2985 | ||
1ac6313d | 2986 | /*start modification David Larochelle */ |
2987 | ||
2988 | if (!ffix && !tfix) | |
2989 | { | |
2990 | setCodePoint (); | |
2991 | checkTransferNullTerminatedAux (fref, fexp, ffix, tref, texp, tfix, | |
2992 | loc, transferType); | |
2993 | } | |
2994 | /*end modification */ | |
2995 | ||
885824d3 | 2996 | if (!ffix && !tfix) |
2997 | { | |
2998 | setCodePoint (); | |
2999 | checkTransferNullAux (fref, fexp, ffix, tref, texp, tfix, | |
3000 | loc, transferType); | |
3001 | } | |
3002 | ||
3003 | if (isassign) | |
3004 | { | |
3005 | setCodePoint (); | |
3006 | checkTransferAssignAux (fref, fexp, ffix, tref, texp, tfix, | |
3007 | loc, transferType); | |
3008 | } | |
3009 | ||
3010 | /* | |
3011 | ** Check for definition | |
3012 | */ | |
3013 | ||
3014 | /* | |
3015 | ** errors passing out params already detected in checkAnyCall | |
3016 | */ | |
3017 | ||
3018 | if (!ffix && !tfix) | |
3019 | { | |
3020 | bool defok = TRUE; | |
3021 | ||
3022 | if (!iseitherassign | |
3023 | || (!sRef_isNSLocalVar (tref) | |
3024 | && (sRef_isAnyDefined (tref) || !sRef_stateKnown (tref)))) | |
3025 | { | |
3026 | setCodePoint (); | |
3027 | ||
3028 | if (!ynm_toBoolRelaxed | |
3029 | (checkCompletelyDefined (fexp, fref, texp, tref, | |
3030 | TRUE, FALSE, FALSE, | |
3031 | loc, transferType, 0, TRUE))) | |
3032 | { | |
3033 | defok = FALSE; | |
3034 | } | |
3035 | } | |
3036 | ||
3037 | setCodePoint (); | |
3038 | ||
3039 | if (defok && iseitherassign) | |
3040 | { | |
3041 | sRef_setDefState (tref, sRef_getDefState (fref), loc); | |
3042 | } | |
3043 | } | |
3044 | ||
3045 | ||
3046 | /* | |
3047 | ** check exposure | |
3048 | */ | |
3049 | ||
3050 | setCodePoint (); | |
3051 | checkTransferExposure (fref, fexp, ffix, tref, texp, tfix, | |
3052 | loc, transferType); | |
3053 | ||
3054 | fkind = sRef_getAliasKind (fref); | |
3055 | tkind = sRef_getAliasKind (tref); | |
3056 | ||
3057 | /* | |
3058 | ** check aliasing | |
3059 | */ | |
3060 | ||
3061 | if (alkind_isOnly (fkind)) | |
3062 | { | |
3063 | setCodePoint (); | |
3064 | checkOnlyTransferAux (fref, fexp, ffix, | |
3065 | tref, texp, tfix, | |
3066 | loc, transferType); | |
3067 | } | |
3068 | else if (alkind_isFresh (fkind)) | |
3069 | { | |
3070 | setCodePoint (); | |
3071 | checkFreshTransferAux (fref, fexp, ffix, | |
3072 | tref, texp, tfix, | |
3073 | loc, transferType); | |
3074 | } | |
3075 | else if (alkind_isOwned (fkind)) | |
3076 | { | |
3077 | setCodePoint (); | |
3078 | checkOwnedTransferAux (fref, fexp, ffix, | |
3079 | tref, texp, tfix, | |
3080 | loc, transferType); | |
3081 | } | |
3082 | else if (alkind_isDependent (fkind)) | |
3083 | { | |
3084 | setCodePoint (); | |
3085 | if (isfcnreturn && | |
3086 | (sRef_isExposed (tref) || sRef_isObserver (tref))) | |
3087 | { | |
3088 | ; /* okay */ | |
3089 | } | |
3090 | else if ((alkind_isOnly (tkind) || alkind_isKeep (tkind) | |
3091 | || alkind_isOwned (tkind)) | |
3092 | || (!isfcnpass && alkind_isTemp (tkind))) | |
3093 | { | |
3094 | bool error = TRUE; | |
3095 | ||
3096 | if (sRef_isLocalVar (fref)) | |
3097 | { | |
3098 | sRef depRef = dependentReference (fref); | |
3099 | ||
3100 | if (sRef_isValid (depRef) && sRef_isLocalVar (depRef)) | |
3101 | { | |
3102 | error = FALSE; | |
3103 | sRef_kill (depRef, loc); | |
3104 | sRef_kill (fref, loc); | |
3105 | } | |
3106 | ||
3107 | } | |
3108 | ||
3109 | if (isfieldassign) | |
3110 | { | |
3111 | error = FALSE; | |
3112 | } | |
3113 | ||
3114 | if (canLoseLocalReference (fref, loc)) | |
3115 | { | |
3116 | ; | |
3117 | } | |
3118 | else | |
3119 | { | |
3120 | if (error && | |
3121 | (optgenerror | |
3122 | (FLG_DEPENDENTTRANS, | |
3123 | message ("%s storage %q%q: %q", | |
3124 | alkind_capName (fkind), | |
3125 | sRef_unparseOpt (fref), | |
3126 | transferErrorMessage (transferType, tkind), | |
3127 | generateText (fexp, texp, tref, transferType)), | |
3128 | loc))) | |
3129 | { | |
3130 | DPRINTF (("Here: %s / %s", | |
3131 | sRef_unparseFull (fref), | |
3132 | sRef_unparseFull (tref))); | |
3133 | ||
3134 | sRef_showAliasInfo (fref); | |
3135 | } | |
3136 | } | |
3137 | } | |
3138 | else | |
3139 | { | |
3140 | if (isassign && (alkind_isFresh (tkind) || alkind_isLocal (tkind))) | |
3141 | { | |
3142 | if (!tfix && !ffix) | |
3143 | { | |
3144 | sRef_setDependent (tref, loc); | |
3145 | } | |
3146 | } | |
3147 | } | |
3148 | } | |
3149 | else if (alkind_isShared (fkind)) | |
3150 | { | |
3151 | setCodePoint (); | |
3152 | /* | |
3153 | ** xxx <- shared | |
3154 | */ | |
3155 | ||
3156 | if (alkind_isOnly (tkind) | |
3157 | || (!isfcnpass | |
3158 | && (!(sRef_isObserver (tref) || sRef_isExposed (tref)) | |
3159 | && alkind_isTemp (tkind)))) | |
3160 | { | |
3161 | if (optgenerror | |
3162 | (FLG_SHAREDTRANS, | |
3163 | message ("%s storage %q%q: %q", | |
3164 | alkind_capName (fkind), | |
3165 | sRef_unparseOpt (fref), | |
3166 | transferErrorMessage (transferType, tkind), | |
3167 | generateText (fexp, texp, tref, transferType)), | |
3168 | loc)) | |
3169 | { | |
3170 | sRef_showAliasInfo (fref); | |
3171 | } | |
3172 | } | |
3173 | else | |
3174 | { | |
3175 | if (alkind_isFresh (tkind) || alkind_isLocal (tkind)) | |
3176 | { | |
3177 | sRef_setShared (tref, loc); | |
3178 | } | |
3179 | } | |
3180 | } | |
3181 | else if (alkind_isKeep (fkind)) | |
3182 | { | |
3183 | setCodePoint (); | |
3184 | ||
3185 | if (alkind_isKeep (tkind) | |
3186 | || alkind_isLocal (tkind) | |
3187 | || (isfcnreturn && sRef_isExposed (tref)) | |
3188 | || (iseitherassign | |
3189 | && (alkind_isOnly (tkind) || alkind_isOwned (tkind)))) | |
3190 | { | |
3191 | sRef_setKept (fref, loc); | |
3192 | } | |
3193 | else if (isfcnpass | |
3194 | && (alkind_isTemp (tkind) || alkind_isOwned (tkind))) | |
3195 | { | |
3196 | ; | |
3197 | } | |
3198 | else | |
3199 | { | |
3200 | if (!alkind_isError (tkind)) | |
3201 | { | |
3202 | if (optgenerror | |
3203 | (FLG_KEEPTRANS, | |
3204 | message ("%s storage %q: %q", | |
3205 | alkind_capName (fkind), | |
3206 | transferErrorMessage (transferType, tkind), | |
3207 | generateText (fexp, texp, tref, transferType)), | |
3208 | loc)) | |
3209 | { | |
3210 | sRef_showAliasInfo (fref); | |
3211 | } | |
3212 | } | |
3213 | } | |
3214 | } | |
3215 | else if (alkind_isTemp (fkind) || alkind_isKept (fkind)) | |
3216 | { | |
3217 | /* | |
3218 | ** xxx <- temp | |
3219 | */ | |
3220 | ||
3221 | if (alkind_isOnly (tkind) | |
3222 | || alkind_isShared (tkind) | |
3223 | || (alkind_isTemp (fkind) | |
3224 | && !isfcnreturn && alkind_isDependent (tkind)) | |
3225 | || alkind_isOwned (tkind) | |
3226 | || alkind_isKeep (tkind)) | |
3227 | { | |
3228 | if (!exprNode_isNullValue (fexp) | |
3229 | && (ctype_isMutable (exprNode_getType (fexp)) | |
3230 | || (ctype_isArray (exprNode_getType (fexp)) | |
3231 | && sRef_isParam (fref))) | |
3232 | && (!iseitherassign || sRef_isReference (tref))) | |
3233 | { | |
3234 | if (sRef_isThroughArrayFetch (fref)) | |
3235 | { | |
3236 | if (optgenerror2 | |
3237 | (alkind_isTemp (fkind) ? FLG_TEMPTRANS : FLG_KEPTTRANS, | |
3238 | FLG_STRICTUSERELEASED, | |
3239 | message ("%s storage %q%q: %q", | |
3240 | alkind_capName (fkind), | |
3241 | sRef_unparseOpt (fref), | |
3242 | transferErrorMessage (transferType, tkind), | |
3243 | generateText (fexp, texp, tref, transferType)), | |
3244 | loc)) | |
3245 | { | |
3246 | sRef_showAliasInfo (fref); | |
3247 | } | |
3248 | } | |
3249 | else | |
3250 | { | |
3251 | if (optgenerror | |
3252 | (alkind_isTemp (fkind) ? FLG_TEMPTRANS : FLG_KEPTTRANS, | |
3253 | message ("%s storage %q%q: %q", | |
3254 | alkind_capName (fkind), | |
3255 | sRef_unparseOpt (fref), | |
3256 | transferErrorMessage (transferType, tkind), | |
3257 | generateText (fexp, texp, tref, transferType)), | |
3258 | loc)) | |
3259 | { | |
3260 | sRef_showAliasInfo (fref); | |
3261 | } | |
3262 | } | |
3263 | } | |
3264 | } | |
3265 | } | |
3266 | else if (alkind_isRefCounted (fkind) || alkind_isKillRef (fkind)) | |
3267 | { | |
3268 | if (alkind_isNewRef (tkind)) | |
3269 | { | |
3270 | /* | |
3271 | ** check that the refs field has been modified | |
3272 | */ | |
3273 | ||
3274 | if (!sRef_isConst (fref)) | |
3275 | { | |
3276 | voptgenerror | |
3277 | (FLG_REFCOUNTTRANS, | |
3278 | message ("Reference counted storage returned without modifying " | |
3279 | "reference count: %s", | |
3280 | exprNode_unparse (fexp)), | |
3281 | loc); | |
3282 | } | |
3283 | } | |
3284 | else if (iseitherassign) | |
3285 | { | |
3286 | if (alkind_isRefCounted (fkind)) | |
3287 | { | |
3288 | if (!sRef_isLocalVar (tref)) | |
3289 | { | |
3290 | vgenhinterror | |
3291 | (FLG_REFCOUNTTRANS, | |
3292 | message | |
3293 | ("Assignment to non-local from reference counted storage: %s", | |
3294 | exprNode_unparse (fexp)), | |
3295 | cstring_makeLiteral | |
3296 | ("Reference counted storage should call a function returning " | |
3297 | "a newref instead of direct assignments."), | |
3298 | loc); | |
3299 | } | |
3300 | else | |
3301 | { | |
3302 | ; | |
3303 | } | |
3304 | } | |
3305 | } | |
3306 | else /* fcnpass */ | |
3307 | { | |
3308 | if (alkind_isRefCounted (tkind) || alkind_isTemp (tkind)) | |
3309 | { | |
3310 | /* okay --- no change in state */ | |
3311 | } | |
3312 | else if (alkind_isKillRef (tkind)) | |
3313 | { | |
3314 | if (!ffix && !tfix && !(transferType == TT_FCNRETURN)) | |
3315 | { | |
3316 | sRef_killComplete (fref, loc); | |
3317 | } | |
3318 | } | |
3319 | else | |
3320 | { | |
3321 | if (!alkind_isError (tkind)) | |
3322 | { | |
3323 | voptgenerror | |
3324 | (FLG_REFCOUNTTRANS, | |
3325 | message ("Reference counted storage %q: %q", | |
3326 | transferErrorMessage (transferType, tkind), | |
3327 | generateText (fexp, texp, tref, transferType)), | |
3328 | loc); | |
3329 | } | |
3330 | } | |
3331 | } | |
3332 | } | |
3333 | else | |
3334 | { | |
3335 | ; | |
3336 | } | |
3337 | ||
3338 | setCodePoint (); | |
3339 | ||
3340 | if (alkind_isOnly (tkind) || alkind_isKeep (tkind)) | |
3341 | { | |
3342 | if (sRef_isAddress (fref)) | |
3343 | { | |
3344 | voptgenerror | |
3345 | (FLG_IMMEDIATETRANS, | |
3346 | message ("Immediate address %q %q: %q", | |
3347 | sRef_unparse (fref), | |
3348 | transferErrorMessage (transferType, tkind), | |
3349 | generateText (fexp, texp, tref, transferType)), | |
3350 | loc); | |
3351 | ||
3352 | sRef_setAliasKind (fref, AK_ERROR, loc); | |
3353 | } | |
3354 | else | |
3355 | { | |
3356 | if ((alkind_isUnknown (fkind) || alkind_isStatic (fkind)) | |
3357 | && !sRef_isDefinitelyNull (fref) | |
3358 | && (!ffix && !tfix) | |
3359 | && (!exprNode_isNullValue (fexp))) | |
3360 | { | |
3361 | flagcode errkind = alkind_isStatic (fkind) | |
3362 | ? FLG_STATICTRANS : FLG_UNKNOWNTRANS; | |
3363 | ||
3364 | if (transferType == TT_GLOBINIT) | |
3365 | { | |
3366 | if (errkind == FLG_STATICTRANS) | |
3367 | { | |
3368 | errkind = FLG_STATICINITTRANS; | |
3369 | } | |
3370 | else | |
3371 | { | |
3372 | errkind = FLG_UNKNOWNINITTRANS; | |
3373 | } | |
3374 | } | |
3375 | ||
3376 | if (optgenerror | |
3377 | (errkind, | |
3378 | message ("%s storage %s %q: %q", | |
3379 | alkind_capName (fkind), | |
3380 | exprNode_unparse (fexp), | |
3381 | transferErrorMessage (transferType, tkind), | |
3382 | generateText (fexp, texp, tref, transferType)), | |
3383 | loc)) | |
3384 | { | |
3385 | sRef_showAliasInfo (fref); | |
3386 | } | |
3387 | } | |
3388 | } | |
3389 | ||
3390 | /* don't kill shared to suppress future messages */ | |
3391 | if (!alkind_isShared (fkind)) | |
3392 | { | |
3393 | if (isassign) | |
3394 | { | |
3395 | if (!ffix) | |
3396 | { | |
3397 | /*< yuk! should do this in aliasaux >*/ | |
3398 | ||
3399 | if (!sRef_isNSLocalVar (tref) && !sRef_sameName (fref, tref)) | |
3400 | { | |
3401 | if (!tfix) | |
3402 | { | |
3403 | sRef_setKeptComplete (fref, loc); | |
3404 | } | |
3405 | else | |
3406 | { | |
3407 | sRef_setKept (fref, loc); | |
3408 | } | |
3409 | } | |
3410 | } | |
3411 | } | |
3412 | else | |
3413 | { | |
3414 | if (!ffix) | |
3415 | { | |
3416 | if (!tfix) | |
3417 | { | |
3418 | if (alkind_isKeep (tkind)) | |
3419 | { | |
3420 | sRef_setKeptComplete (fref, loc); | |
3421 | } | |
3422 | else | |
3423 | { | |
3424 | sRef_killComplete (fref, loc); | |
3425 | } | |
3426 | } | |
3427 | else | |
3428 | { | |
3429 | if (alkind_isKeep (tkind)) | |
3430 | { | |
3431 | sRef_setKept (fref, loc); | |
3432 | } | |
3433 | else | |
3434 | { | |
3435 | sRef_kill (fref, loc); | |
3436 | } | |
3437 | } | |
3438 | } | |
3439 | } | |
3440 | } | |
3441 | } | |
3442 | else if (alkind_isOwned (tkind)) | |
3443 | { | |
3444 | /* don't kill shared to suppress future messages */ | |
3445 | if (!alkind_isShared (fkind)) | |
3446 | { | |
3447 | if (!isassign | |
3448 | || !sRef_sameName (fref, tref)) /* result of return parameter */ | |
3449 | { | |
3450 | if (!ffix) | |
3451 | { | |
3452 | if (!tfix) | |
3453 | { | |
3454 | sRef_setDependentComplete (fref, loc); | |
3455 | } | |
3456 | else | |
3457 | { | |
3458 | sRef_setDependent (fref, loc); | |
3459 | } | |
3460 | } | |
3461 | } | |
3462 | } | |
3463 | } | |
3464 | else if (alkind_isShared (tkind)) | |
3465 | { | |
3466 | if (alkind_isFresh (fkind) || alkind_isLocal (fkind)) | |
3467 | { | |
3468 | if (!ffix) | |
3469 | { | |
3470 | sRef_setShared (fref, loc); | |
3471 | } | |
3472 | } | |
3473 | } | |
3474 | else if (alkind_isUnknown (tkind) && context_getFlag (FLG_MEMIMPLICIT)) | |
3475 | { | |
3476 | if (alkind_isDependent (fkind)) | |
3477 | { | |
3478 | if (!exprNode_isNullValue (fexp) | |
3479 | && ctype_isMutable (exprNode_getType (fexp)) | |
3480 | && (!iseitherassign || sRef_isReference (tref))) | |
3481 | { | |
3482 | if (canLoseReference (fref, loc)) | |
3483 | { | |
3484 | ; | |
3485 | } | |
3486 | else | |
3487 | { | |
3488 | if (optgenerror | |
3489 | (FLG_DEPENDENTTRANS, | |
3490 | message ("%s storage %q%q: %q", | |
3491 | alkind_capName (fkind), | |
3492 | sRef_unparseOpt (fref), | |
3493 | transferErrorMessage (transferType, tkind), | |
3494 | generateText (fexp, texp, tref, transferType)), | |
3495 | loc)) | |
3496 | { | |
3497 | DPRINTF (("Here: %s / %s", sRef_unparseFull (fref), | |
3498 | sRef_unparseFull (tref))); | |
3499 | sRef_showAliasInfo (fref); | |
3500 | } | |
3501 | } | |
3502 | } | |
3503 | } | |
3504 | } | |
3505 | else if (alkind_isNewRef (tkind)) | |
3506 | { | |
3507 | if (!ffix && !tfix) | |
3508 | { | |
3509 | sRef_killComplete (fref, loc); | |
3510 | } | |
3511 | } | |
3512 | else if (alkind_isKillRef (tkind)) | |
3513 | { | |
3514 | if (transferType == TT_FCNRETURN) | |
3515 | { | |
3516 | if (sRef_isNewRef (fref)) | |
3517 | { | |
3518 | if (optgenerror | |
3519 | (FLG_REFCOUNTTRANS, | |
3520 | message ("New reference returned as temp reference: %q", | |
3521 | generateText (fexp, texp, tref, transferType)), | |
3522 | loc)) | |
3523 | { | |
3524 | sRef_showAliasInfo (fref); | |
3525 | } | |
3526 | } | |
3527 | } | |
3528 | else | |
3529 | { | |
3530 | if (sRef_isNewRef (fref)) | |
3531 | { | |
3532 | sRef_killComplete (fref, loc); | |
3533 | } | |
3534 | else | |
3535 | { | |
3536 | if (sRef_isRefCounted (fref) | |
3537 | && sRef_isCvar (fref) | |
3538 | && !sRef_isLocalVar (fref)) | |
3539 | { | |
3540 | if (optgenerror | |
3541 | (FLG_REFCOUNTTRANS, | |
3542 | message | |
3543 | ("External reference counted storage released: %q", | |
3544 | generateText (fexp, texp, tref, transferType)), | |
3545 | loc)) | |
3546 | { | |
3547 | sRef_showAliasInfo (fref); | |
3548 | } | |
3549 | } | |
3550 | } | |
3551 | } | |
3552 | ||
3553 | } | |
3554 | else | |
3555 | { | |
3556 | ; | |
3557 | } | |
3558 | ||
3559 | setCodePoint (); | |
3560 | } | |
3561 | ||
3562 | /* | |
3563 | ** assigns fexp := tref or passes fexp as a parameter, or returns fexp. | |
3564 | ** | |
3565 | ** For assignments, sets alias and definition state accordingly. | |
3566 | */ | |
3567 | ||
3568 | static void | |
3569 | checkTransfer (exprNode fexp, sRef fref, exprNode texp, sRef tref, | |
3570 | fileloc loc, transferKind transferType) | |
3571 | { | |
3572 | setCodePoint (); | |
3573 | ||
3574 | if (context_inProtectVars ()) | |
3575 | { | |
3576 | return; | |
3577 | } | |
3578 | ||
3579 | /* | |
3580 | ** for local references, we need to check | |
3581 | ** the transfer for all possible aliases. | |
3582 | */ | |
3583 | ||
3584 | if (sRef_isLocalVar (tref) && transferType != TT_DOASSIGN) | |
3585 | { | |
3586 | sRefSet alias = usymtab_allAliases (tref); | |
3587 | ||
3588 | sRefSet_realElements (alias, atref) | |
3589 | { | |
3590 | sRef abase = sRef_getRootBase (atref); | |
3591 | ||
3592 | if (sRef_isKnown (atref) | |
3593 | && !sRef_isLocalVar (abase) | |
3594 | && !sRef_isExternal (abase)) | |
3595 | { | |
3596 | atref = sRef_updateSref (atref); | |
3597 | ||
3598 | if (sRef_hasName (atref)) | |
3599 | { | |
3600 | if (!sRef_isNew (atref) | |
3601 | && !sRef_sameName (tref, atref)) | |
3602 | { | |
3603 | context_setAliasAnnote (atref, tref); | |
3604 | } | |
3605 | ||
3606 | checkTransferAux (fexp, fref, TRUE, | |
3607 | texp, atref, FALSE, | |
3608 | loc, transferType); | |
3609 | ||
3610 | context_clearAliasAnnote (); | |
3611 | } | |
3612 | } | |
3613 | } end_sRefSet_realElements; | |
3614 | ||
3615 | sRefSet_free (alias); | |
3616 | } | |
3617 | ||
3618 | ||
3619 | if (sRef_isLocalVar (fref)) | |
3620 | { | |
3621 | sRefSet alias = usymtab_allAliases (fref); | |
3622 | ||
3623 | sRefSet_realElements (alias, afref) | |
3624 | { | |
3625 | sRef abase = sRef_getRootBase (afref); | |
3626 | ||
3627 | if (sRef_isKnown (afref) | |
3628 | && !sRef_isLocalVar (abase) | |
3629 | && !sRef_isExternal (abase)) | |
3630 | { | |
3631 | afref = sRef_updateSref (afref); | |
3632 | ||
3633 | if (sRef_hasName (afref)) | |
3634 | { | |
3635 | if (!sRef_isNew (afref) | |
3636 | && !sRef_sameName (afref, fref)) | |
3637 | { | |
3638 | context_setAliasAnnote (afref, fref); | |
3639 | } | |
3640 | ||
3641 | checkTransferAux (fexp, afref, FALSE, | |
3642 | texp, tref, TRUE, | |
3643 | loc, transferType); | |
3644 | ||
3645 | context_clearAliasAnnote (); | |
3646 | } | |
3647 | } | |
3648 | } end_sRefSet_realElements; | |
3649 | ||
3650 | sRefSet_free (alias); | |
3651 | } | |
3652 | ||
3653 | setCodePoint (); | |
3654 | ||
3655 | checkTransferAux (fexp, fref, FALSE, texp, tref, FALSE, | |
3656 | loc, transferType); | |
3657 | ||
3658 | setCodePoint (); | |
3659 | } | |
3660 | ||
3661 | static /*@exposed@*/ sRef | |
3662 | dependentReference (sRef sr) | |
3663 | { | |
3664 | sRefSet ab = usymtab_aliasedBy (sr); /* yes, really mean aliasedBy */ | |
3665 | ||
3666 | /* | |
3667 | ** If there is a local variable that aliases sr, then there is no | |
3668 | ** error. Make the local an only. | |
3669 | */ | |
3670 | ||
3671 | if (!sRefSet_isEmpty (ab)) | |
3672 | { | |
3673 | sRef res = sRef_undefined; | |
3674 | ||
3675 | /* | |
3676 | ** make one an only, others alias it | |
3677 | */ | |
3678 | ||
3679 | ||
3680 | sRefSet_realElements (ab, current) | |
3681 | { | |
3682 | if (sRef_isOwned (current)) | |
3683 | { | |
3684 | res = current; | |
3685 | break; | |
3686 | } | |
3687 | } end_sRefSet_realElements; | |
3688 | ||
3689 | sRefSet_free (ab); | |
3690 | return res; | |
3691 | } | |
3692 | ||
3693 | return sRef_undefined; | |
3694 | } | |
3695 | ||
3696 | bool canLoseReference (sRef sr, fileloc loc) | |
3697 | { | |
3698 | bool gotone = FALSE; | |
3699 | sRefSet ab = usymtab_aliasedBy (sr); /* yes, really mean aliasedBy */ | |
3700 | ||
3701 | ||
3702 | /* | |
3703 | ** if there is a local variable that aliases sr, then there is no | |
3704 | ** error. Make the local an only. | |
3705 | */ | |
3706 | ||
3707 | if (!sRefSet_isEmpty (ab)) | |
3708 | { | |
3709 | /* | |
3710 | ** make one an only, others alias it | |
3711 | */ | |
3712 | ||
3713 | ||
3714 | sRefSet_realElements (ab, current) | |
3715 | { | |
3716 | sRef_setLastReference (current, sr, loc); | |
3717 | gotone = TRUE; | |
3718 | break; | |
3719 | } end_sRefSet_realElements; | |
3720 | ||
3721 | sRefSet_free (ab); | |
3722 | } | |
3723 | ||
3724 | return gotone; | |
3725 | } | |
3726 | ||
3727 | bool canLoseLocalReference (sRef sr, fileloc loc) | |
3728 | { | |
3729 | bool gotone = FALSE; | |
3730 | sRefSet ab = usymtab_aliasedBy (sr); /* yes, really mean aliasedBy */ | |
3731 | ||
3732 | ||
3733 | /* | |
3734 | ** if there is a local variable that aliases sr, then there is no | |
3735 | ** error. Make the local an only. | |
3736 | */ | |
3737 | ||
3738 | if (!sRefSet_isEmpty (ab)) | |
3739 | { | |
3740 | /* | |
3741 | ** make one an only, others alias it | |
3742 | */ | |
3743 | ||
3744 | ||
3745 | sRefSet_realElements (ab, current) | |
3746 | { | |
3747 | if (sRef_isRealLocalVar (sRef_getRootBase (current))) | |
3748 | { | |
3749 | sRef_setLastReference (current, sr, loc); | |
3750 | gotone = TRUE; | |
3751 | break; | |
3752 | } | |
3753 | } end_sRefSet_realElements; | |
3754 | ||
3755 | sRefSet_free (ab); | |
3756 | } | |
3757 | ||
3758 | return gotone; | |
3759 | } | |
3760 | ||
3761 | ||
1ac6313d | 3762 | /*start modification */ |
3763 | ||
3764 | /*added by David Larochelle 4/13/2000*/ | |
3765 | ||
3766 | /*this is modeled after checkTransferNullAux */ | |
3767 | ||
3768 | static void | |
3769 | checkTransferNullTerminatedAux (sRef fref, exprNode fexp, | |
3770 | /*@unused@*/ bool ffix, | |
3771 | sRef tref, exprNode texp, /*@unused@*/ bool tfix, | |
3772 | fileloc loc, transferKind transferType) | |
3773 | { | |
3774 | alkind tkind = sRef_getAliasKind (tref); | |
3775 | ctype ttyp = ctype_realType (sRef_getType (tref)); | |
3776 | ||
3777 | /* DEBUG | |
3778 | printf ("checking for fexp-%s\n", exprNode_unparse(fexp)); | |
3779 | printf ("checking for texp-%s\n", exprNode_unparse(texp)); | |
3780 | */ | |
3781 | ||
3782 | if (ctype_isUnknown (ttyp)) | |
3783 | { | |
3784 | ttyp = exprNode_getType (texp); | |
3785 | ||
3786 | if (ctype_isUnknown (ttyp)) | |
3787 | { | |
3788 | ttyp = exprNode_getType (fexp); | |
3789 | ||
3790 | if (ctype_isUnknown (ttyp)) | |
3791 | { | |
3792 | ttyp = sRef_getType (fref); | |
3793 | } | |
3794 | } | |
3795 | } | |
3796 | ||
3797 | if (ctype_isFunction (ttyp) && (transferType == TT_FCNRETURN)) | |
3798 | { | |
3799 | ttyp = ctype_returnValue (ttyp); | |
3800 | } | |
3801 | ||
3802 | /* | |
3803 | ** check for null terminated (don't need to check aliases??) | |
3804 | */ | |
3805 | ||
3806 | if (!sRef_isNullTerminated (fref) | |
3807 | && !usymtab_isGuarded (fref) | |
3808 | && ctype_isRealAP (ttyp)) | |
3809 | { | |
3810 | if (!alkind_isLocal (tkind) && !alkind_isFresh (tkind) | |
3811 | //this should be perhapsNullTerminated but I didn't want to write | |
3812 | && (sRef_isPossiblyNullTerminated (tref) || | |
3813 | sRef_isNullTerminated (tref)) | |
3814 | && !(transferType == TT_DOASSIGN)) | |
3815 | { | |
3816 | if (transferType == TT_GLOBINIT) | |
3817 | { | |
3818 | printf("-----------------------------------NULLTERMINATED ERROR1\n"); | |
3819 | if (sRef_isPossiblyNullTerminated (fref)) { | |
3820 | if (lloptgenerror | |
3821 | (FLG_NULLTERMINATEDWARNING, | |
3822 | message ("%s %q initialized to %s value: %q", | |
3823 | sRef_getScopeName (tref), | |
3824 | sRef_unparse (tref), | |
3825 | sRef_ntMessage (fref), | |
3826 | generateText (fexp, texp, tref, transferType)), | |
3827 | loc)) | |
3828 | { | |
3829 | ||
3830 | printf ("NULLTERMINATED REFERENCE ERROR\n"); | |
3831 | // printf ("First way\n"); | |
3832 | } | |
3833 | ||
3834 | } else { | |
3835 | ||
3836 | if (lloptgenerror | |
3837 | (FLG_NULLTERMINATED, | |
3838 | message ("%s %q initialized to %s value: %q", | |
3839 | sRef_getScopeName (tref), | |
3840 | sRef_unparse (tref), | |
3841 | sRef_ntMessage (fref), | |
3842 | generateText (fexp, texp, tref, transferType)), | |
3843 | loc)) | |
3844 | { | |
3845 | ||
3846 | printf ("NULLTERMINATED REFERENCE ERROR\n"); | |
3847 | // printf ("First way\n"); | |
3848 | } | |
3849 | ||
3850 | printf("-----------------------------\n\n"); | |
3851 | ||
3852 | } | |
3853 | } | |
3854 | else | |
3855 | { | |
3856 | printf("****************************NULLTERMINATED ERROR2\n"); | |
3857 | // ((transferType == TT_FCNPASS) ? FLG_NULLPASS : FLG_NULLRET, | |
3858 | ||
3859 | if (sRef_isPossiblyNullTerminated (fref)) | |
3860 | { | |
3861 | if (lloptgenerror | |
3862 | (FLG_NULLTERMINATEDWARNING, | |
3863 | message ("%q storage %q%s: %q", | |
3864 | cstring_capitalize (sRef_ntMessage (fref)), | |
3865 | sRef_unparseOpt (fref), | |
3866 | transferNTMessage (transferType), | |
3867 | generateText (fexp, texp, tref, transferType)), | |
3868 | loc)) | |
3869 | { | |
3870 | ||
3871 | printf ("NULLTERMINATED REFERENCE ERROR\n"); | |
3872 | // printf ("First way\n"); | |
3873 | } | |
3874 | ||
3875 | } else { | |
3876 | if (lloptgenerror | |
3877 | ((transferType == TT_FCNPASS) ? FLG_NULLTERMINATED: FLG_NULLTERMINATED, | |
3878 | message ("%q storage %q%s: %q", | |
3879 | cstring_capitalize (sRef_ntMessage (fref)), | |
3880 | sRef_unparseOpt (fref), | |
3881 | transferNTMessage (transferType), | |
3882 | generateText (fexp, texp, tref, transferType)), | |
3883 | loc)) | |
3884 | { | |
3885 | // sRef_showNullInfo (fref); | |
3886 | // sRef_setNullError (fref); | |
3887 | printf ("SYMBOL REFERENCED IS NOT NULLTERMINATED!\n"); | |
3888 | ||
3889 | } | |
3890 | printf("*******************************=\n\n"); | |
3891 | } | |
3892 | } | |
3893 | } | |
3894 | else | |
3895 | { | |
3896 | ; | |
3897 | } | |
3898 | } | |
3899 | } | |
3900 | /* end modification */ | |
3901 | ||
3902 |