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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 | ||
4cccc6ad | 50 | /* added DRL 8/19/200- */ |
51 | static void | |
52 | checkTransferNullTerminatedAux (sRef p_fref, exprNode p_fexp, | |
53 | /*@unused@*/ bool p_ffix, | |
54 | sRef p_tref, exprNode p_texp, /*@unused@*/ bool p_tfix, | |
55 | fileloc p_loc, transferKind p_transferType); | |
885824d3 | 56 | /* |
57 | ** returns the most specific alkind | |
58 | */ | |
59 | ||
60 | alkind alkind_resolve (alkind a1, alkind a2) | |
61 | { | |
62 | if (a1 == AK_UNKNOWN || a1 == AK_ERROR) return a2; | |
63 | if (a2 == AK_UNKNOWN || a2 == AK_ERROR || a2 == AK_LOCAL) return a1; | |
64 | if (a1 == AK_LOCAL) return a2; | |
65 | return a1; | |
66 | } | |
67 | ||
68 | /* | |
69 | ** tref <- fref | |
70 | ** | |
71 | ** transferType: | |
72 | ** FCNRETURN return fref; tref is return type | |
73 | ** GLOBASSIGN tref = fref; | |
74 | ** FCNPASS call (fref) ; tref is the argument type | |
75 | ** | |
76 | */ | |
77 | ||
78 | static /*@only@*/ cstring | |
79 | transferErrorMessage (transferKind transferType, alkind tkind) /*@*/ | |
80 | { | |
81 | switch (transferType) | |
82 | { | |
83 | case TT_FCNRETURN: | |
84 | return (message ("returned as %s", alkind_unparse (tkind))); | |
85 | case TT_DOASSIGN: | |
86 | return (message ("assigned to %s", alkind_unparse (tkind))); | |
87 | case TT_FIELDASSIGN: | |
88 | return (message ("assigned to %s", alkind_unparse (tkind))); | |
89 | case TT_GLOBINIT: | |
90 | return (message ("used as initial value for %s", | |
91 | alkind_unparse (tkind))); | |
92 | case TT_FCNPASS: | |
93 | return (message ("passed as %s param", alkind_unparse (tkind))); | |
94 | BADDEFAULT; | |
95 | } | |
96 | BADEXIT; | |
97 | } | |
98 | ||
99 | static cstring | |
100 | transferErrorExpMessage (transferKind transferType, exkind tkind) /*@*/ | |
101 | { | |
102 | if (exkind_isUnknown (tkind)) | |
103 | { | |
104 | switch (transferType) | |
105 | { | |
106 | case TT_FCNRETURN: | |
107 | return (cstring_makeLiteral ("returned without qualification")); | |
108 | case TT_FIELDASSIGN: | |
109 | case TT_DOASSIGN: | |
110 | return (cstring_makeLiteral ("assigned to unqualified reference")); | |
111 | case TT_FCNPASS: | |
112 | return (cstring_makeLiteral ("passed without qualification")); | |
113 | case TT_GLOBINIT: | |
114 | return (cstring_makeLiteral ("used as initial value for unqualified storage")); | |
115 | BADDEFAULT; | |
116 | } | |
117 | } | |
118 | else | |
119 | { | |
120 | switch (transferType) | |
121 | { | |
122 | case TT_FCNRETURN: | |
123 | return (message ("returned as %s", exkind_unparse (tkind))); | |
124 | case TT_FIELDASSIGN: | |
125 | case TT_DOASSIGN: | |
126 | return (message ("assigned to %s", exkind_unparse (tkind))); | |
127 | case TT_FCNPASS: | |
128 | return (message ("passed as %s param", exkind_unparse (tkind))); | |
129 | BADDEFAULT; | |
130 | } | |
131 | } | |
132 | ||
133 | BADEXIT; | |
134 | } | |
135 | ||
136 | static /*@observer@*/ cstring | |
137 | transferNullMessage (transferKind transferType) /*@*/ | |
138 | { | |
139 | switch (transferType) | |
140 | { | |
141 | case TT_FCNRETURN: | |
142 | return (cstring_makeLiteralTemp ("returned as non-null")); | |
143 | case TT_DOASSIGN: | |
144 | case TT_FIELDASSIGN: | |
145 | return (cstring_makeLiteralTemp ("assigned to non-null")); | |
146 | case TT_GLOBINIT: | |
147 | return (cstring_makeLiteralTemp ("initialized to non-null")); | |
148 | case TT_FCNPASS: | |
149 | return (cstring_makeLiteralTemp ("passed as non-null param")); | |
150 | BADDEFAULT; | |
151 | } | |
152 | BADEXIT; | |
153 | } | |
154 | ||
1ac6313d | 155 | static /*@observer@*/ cstring |
156 | transferNTMessage (transferKind transferType) /*@*/ | |
157 | { | |
158 | switch (transferType) | |
159 | { | |
160 | case TT_FCNRETURN: | |
161 | return (cstring_makeLiteralTemp ("returned as nullterminated")); | |
162 | case TT_DOASSIGN: | |
163 | case TT_FIELDASSIGN: | |
164 | return (cstring_makeLiteralTemp ("assigned to nullterminated")); | |
165 | case TT_GLOBINIT: | |
166 | return (cstring_makeLiteralTemp ("initialized to nullterminated")); | |
167 | case TT_FCNPASS: | |
168 | return (cstring_makeLiteralTemp ("passed as nullterminated param")); | |
169 | BADDEFAULT; | |
170 | } | |
171 | BADEXIT; | |
172 | } | |
173 | ||
885824d3 | 174 | static /*@dependent@*/ exprNode atFunction = exprNode_undefined; |
175 | static int atArgNo = 0; | |
176 | static int atNumArgs = 0; | |
177 | ||
178 | static cstring generateText (exprNode e1, exprNode e2, | |
179 | sRef tref, transferKind tt) | |
180 | /*@*/ | |
181 | { | |
182 | if (tt == TT_DOASSIGN || tt == TT_GLOBINIT) | |
183 | { | |
184 | return (message ("%s = %s", exprNode_unparse (e2), | |
185 | exprNode_unparse (e1))); | |
186 | } | |
187 | else if (tt == TT_FIELDASSIGN) | |
188 | { | |
189 | return (message ("%s = %s (field %q)", | |
190 | exprNode_unparse (e2), | |
191 | exprNode_unparse (e1), | |
192 | sRef_unparse (tref))); | |
193 | } | |
194 | else if (tt == TT_FCNPASS) | |
195 | { | |
196 | return (message ("%s (%s%s%s)", | |
197 | exprNode_unparse (atFunction), | |
198 | (atArgNo == 1 ? cstring_undefined | |
199 | : cstring_makeLiteralTemp ("..., ")), | |
200 | exprNode_unparse (e1), | |
201 | (atArgNo == atNumArgs ? cstring_undefined | |
202 | : cstring_makeLiteralTemp (", ...")))); | |
203 | } | |
204 | else | |
205 | { | |
206 | return (cstring_copy (exprNode_unparse (e1))); | |
207 | } | |
208 | } | |
209 | ||
210 | static /*@observer@*/ cstring | |
211 | transferType_unparse (transferKind transferType) /*@*/ | |
212 | { | |
213 | switch (transferType) | |
214 | { | |
215 | case TT_FCNRETURN: | |
216 | return (cstring_makeLiteralTemp ("Returned")); | |
217 | case TT_DOASSIGN: | |
218 | case TT_FIELDASSIGN: | |
219 | return (cstring_makeLiteralTemp ("Assigned")); | |
220 | case TT_FCNPASS: | |
221 | return (cstring_makeLiteralTemp ("Passed")); | |
222 | case TT_GLOBINIT: | |
223 | return (cstring_makeLiteralTemp ("Initialized")); | |
224 | case TT_GLOBRETURN: | |
225 | return (cstring_makeLiteralTemp ("GLOB RETURN!")); | |
226 | case TT_GLOBPASS: | |
227 | return (cstring_makeLiteralTemp ("GLOB PASS!")); | |
228 | case TT_PARAMRETURN: | |
229 | return (cstring_makeLiteralTemp ("PARAM RETURN!")); | |
230 | case TT_LEAVETRANS: | |
231 | return (cstring_makeLiteralTemp ("LEAVE TRANS!")); | |
232 | BADDEFAULT; | |
233 | } | |
234 | BADEXIT; | |
235 | } | |
236 | ||
237 | static /*@observer@*/ cstring udError (sRef s) | |
238 | { | |
239 | if (sRef_isDead (s)) | |
240 | { | |
241 | return cstring_makeLiteralTemp ("released"); | |
242 | } | |
243 | else if (sRef_isAllocated (s)) | |
244 | { | |
245 | return cstring_makeLiteralTemp ("allocated but not defined"); | |
246 | } | |
247 | else | |
248 | { | |
249 | return cstring_makeLiteralTemp ("undefined"); | |
250 | } | |
251 | } | |
252 | ||
253 | static /*@only@*/ | |
254 | cstring defExpl (sRef s) /*@*/ | |
255 | { | |
256 | sRef rb = sRef_getRootBase (s); | |
257 | ||
258 | if (sRef_sameName (rb, s)) | |
259 | { | |
260 | if (sRef_isAllocated (s)) | |
261 | { | |
262 | return cstring_makeLiteral (" (allocated only)"); | |
263 | } | |
264 | return cstring_undefined; | |
265 | } | |
266 | else | |
267 | { | |
268 | return (message (" (%q is %s)", sRef_unparse (s), udError (s))); | |
269 | } | |
270 | } | |
271 | ||
272 | /* | |
273 | ** returns TRUE if fref is completely defined. | |
274 | ** if !report, returns TRUE unless error is at the deep level. | |
275 | */ | |
276 | ||
277 | static ynm | |
278 | checkCompletelyDefined (exprNode fexp, sRef fref, | |
279 | exprNode texp, sRef tref, | |
280 | bool topLevel, bool inUnion, bool directUnion, | |
281 | fileloc loc, transferKind transferType, | |
282 | int depth, bool report) | |
283 | { | |
284 | ctype ct; | |
285 | alkind fkind = sRef_getAliasKind (fref); | |
286 | alkind tkind = sRef_getAliasKind (tref); | |
287 | ||
288 | if (depth > MAXDEPTH) | |
289 | { | |
290 | llquietbug | |
291 | (message | |
292 | ("Check definition limit exceeded, checking %q. " | |
293 | "This either means there is a variable with at least " | |
294 | "%d indirections apparent in the program text, or " | |
295 | "there is a bug in LCLint.", | |
296 | sRef_unparse (fref), | |
297 | MAXDEPTH)); | |
298 | ||
299 | return YES; | |
300 | } | |
301 | ||
302 | if (!sRef_isKnown (fref)) | |
303 | { | |
304 | return YES; | |
305 | } | |
306 | ||
307 | if (alkind_isStack (fkind)) | |
308 | { | |
309 | ctype rt = ctype_realType (sRef_getType (tref)); | |
310 | ||
311 | if (ctype_isMutable (rt) && !ctype_isSU (rt)) | |
312 | { | |
313 | if (transferType == TT_PARAMRETURN) | |
314 | { | |
315 | if (optgenerror | |
316 | (FLG_RETSTACK, | |
317 | message | |
318 | ("Stack-allocated storage %qreachable from parameter %q", | |
319 | sRef_unparseOpt (fref), | |
320 | sRef_unparse (sRef_getRootBase (fref))), | |
321 | loc)) | |
322 | { | |
323 | sRef_showAliasInfo (fref); | |
324 | } | |
325 | } | |
326 | else if (transferType == TT_GLOBRETURN) | |
327 | { | |
328 | if (optgenerror | |
329 | (FLG_RETSTACK, | |
330 | message | |
331 | ("Stack-allocated storage %qreachable from global %q", | |
332 | sRef_unparseOpt (fref), | |
333 | sRef_unparse (sRef_getRootBase (fref))), | |
334 | loc)) | |
335 | { | |
336 | sRef_showAliasInfo (fref); | |
337 | } | |
338 | } | |
339 | else if (transferType == TT_FCNRETURN) | |
340 | { | |
341 | if (optgenerror | |
342 | (FLG_RETSTACK, | |
343 | message | |
344 | ("Stack-allocated storage %qreachable from return value: %s", | |
345 | sRef_unparseOpt (fref), | |
346 | exprNode_unparse (fexp)), | |
347 | loc)) | |
348 | { | |
349 | sRef_showAliasInfo (fref); | |
350 | } | |
351 | } | |
352 | else | |
353 | { | |
354 | /* no error */ | |
355 | } | |
356 | } | |
357 | } | |
358 | ||
359 | if (!topLevel) | |
360 | { | |
361 | if ((sRef_isObserver (fref) && !sRef_isObserver (tref)) | |
362 | || (sRef_isExposed (fref) && !(sRef_isObserver (tref) | |
363 | || sRef_isExposed (tref)))) | |
364 | { | |
365 | flagcode code = (sRef_isObserver (fref) | |
366 | ? FLG_OBSERVERTRANS : FLG_EXPOSETRANS); | |
367 | ||
368 | if (!sRef_isStateLive (fref)) | |
369 | { | |
370 | ; /* no error (will be a definition error) */ | |
371 | } | |
372 | else if (transferType == TT_DOASSIGN | |
373 | || transferType == TT_FIELDASSIGN | |
374 | || transferType == TT_GLOBINIT | |
375 | || transferType == TT_FCNPASS) | |
376 | { | |
377 | ; /* no error */ | |
378 | } | |
379 | else if (transferType == TT_PARAMRETURN) | |
380 | { | |
381 | if (optgenerror | |
382 | (code, | |
383 | message | |
384 | ("%s storage %qreachable from %s parameter", | |
385 | exkind_capName (sRef_getExKind (fref)), | |
386 | sRef_unparseOpt (fref), | |
387 | exkind_unparseError (sRef_getExKind (tref))), | |
388 | loc)) | |
389 | { | |
390 | sRef_showExpInfo (fref); | |
391 | sRef_setExKind (fref, XO_UNKNOWN, loc); | |
392 | } | |
393 | } | |
394 | else if (transferType == TT_LEAVETRANS) | |
395 | { | |
396 | ; | |
397 | } | |
398 | else if (transferType == TT_GLOBINIT) | |
399 | { | |
400 | if (optgenerror | |
401 | (code, | |
402 | message | |
403 | ("%s storage %qreachable from %s initial value", | |
404 | exkind_capName (sRef_getExKind (fref)), | |
405 | sRef_unparseOpt (fref), | |
406 | exkind_unparseError (sRef_getExKind (tref))), | |
407 | loc)) | |
408 | { | |
409 | sRef_showExpInfo (fref); | |
410 | sRef_setExKind (fref, XO_UNKNOWN, loc); | |
411 | } | |
412 | } | |
413 | else if (transferType == TT_GLOBRETURN) | |
414 | { | |
415 | if (optgenerror | |
416 | (code, | |
417 | message | |
418 | ("%s storage %qreachable from %s global", | |
419 | exkind_capName (sRef_getExKind (fref)), | |
420 | sRef_unparseOpt (fref), | |
421 | exkind_unparseError (sRef_getExKind (tref))), | |
422 | loc)) | |
423 | { | |
424 | sRef_showExpInfo (fref); | |
425 | sRef_setExKind (fref, XO_UNKNOWN, loc); | |
426 | } | |
427 | } | |
428 | else if (transferType == TT_FCNRETURN) | |
429 | { | |
430 | if (optgenerror | |
431 | (code, | |
432 | message | |
433 | ("%s storage %qreachable from %s return value", | |
434 | exkind_capName (sRef_getExKind (fref)), | |
435 | sRef_unparseOpt (fref), | |
436 | exkind_unparseError (sRef_getExKind (tref))), | |
437 | loc)) | |
438 | { | |
439 | sRef_showExpInfo (fref); | |
440 | sRef_setExKind (fref, XO_UNKNOWN, loc); | |
441 | } | |
442 | } | |
443 | else | |
444 | { | |
445 | llcontbug (message ("Transfer type: %s", | |
446 | transferType_unparse (transferType))); | |
447 | ||
448 | if (optgenerror | |
449 | (code, | |
450 | message | |
451 | ("%s storage %qreachable from %s return value", | |
452 | exkind_capName (sRef_getExKind (fref)), | |
453 | sRef_unparseOpt (fref), | |
454 | exkind_unparseError (sRef_getExKind (tref))), | |
455 | loc)) | |
456 | { | |
457 | sRef_showExpInfo (fref); | |
458 | sRef_setExKind (fref, XO_UNKNOWN, loc); | |
459 | } | |
460 | } | |
461 | ||
462 | } | |
463 | ||
464 | if (!alkind_compatible (fkind, tkind)) | |
465 | { | |
466 | if (fkind == AK_UNKNOWN && !sRef_isStateLive (fref)) | |
467 | { | |
468 | ; /* no error (will be a definition error) */ | |
469 | } | |
470 | else if (transferType == TT_DOASSIGN) | |
471 | { | |
472 | ; /* no error */ | |
473 | } | |
474 | else if (transferType == TT_FCNPASS) | |
475 | { | |
476 | if (alkind_isKnown (sRef_getAliasKind (tref))) | |
477 | { | |
478 | if (optgenerror | |
479 | (FLG_COMPMEMPASS, | |
480 | message | |
481 | ("Storage %qreachable from passed parameter " | |
482 | "is %s (should be %s): %s", | |
483 | sRef_unparseOpt (fref), | |
484 | alkind_unparse (sRef_getAliasKind (fref)), | |
485 | alkind_unparse (sRef_getAliasKind (tref)), | |
486 | exprNode_unparse (fexp)), | |
487 | loc)) | |
488 | { | |
489 | sRef_showAliasInfo (fref); | |
490 | } | |
491 | } | |
492 | } | |
493 | else if (transferType == TT_PARAMRETURN) | |
494 | { | |
495 | bool noerror = FALSE; | |
496 | ||
497 | if (alkind_isDependent (sRef_getAliasKind (fref))) | |
498 | { | |
499 | if (canLoseLocalReference (fref, loc)) | |
500 | { | |
501 | noerror = TRUE; | |
502 | } | |
503 | } | |
504 | ||
505 | if (!noerror | |
506 | && optgenerror | |
507 | (FLG_COMPMEMPASS, | |
508 | message | |
509 | ("Storage %qreachable from parameter is %s (should be %s)", | |
510 | sRef_unparseOpt (fref), | |
511 | alkind_unparse (sRef_getAliasKind (fref)), | |
512 | alkind_unparse (sRef_getAliasKind (tref))), | |
513 | loc)) | |
514 | { | |
515 | sRef_showAliasInfo (fref); | |
516 | } | |
517 | } | |
518 | else if (transferType == TT_LEAVETRANS) | |
519 | { | |
520 | if (optgenerror | |
521 | (FLG_COMPMEMPASS, | |
522 | message | |
523 | ("Storage %qreachable from temporary reference is %s " | |
524 | "at scope exit (should be %s)", | |
525 | sRef_unparseOpt (fref), | |
526 | alkind_unparse (sRef_getAliasKind (fref)), | |
527 | alkind_unparse (sRef_getAliasKind (tref))), | |
528 | loc)) | |
529 | { | |
530 | sRef_showAliasInfo (fref); | |
531 | } | |
532 | } | |
533 | else if (transferType == TT_GLOBRETURN) | |
534 | { | |
535 | if (optgenerror | |
536 | (FLG_COMPMEMPASS, | |
537 | message | |
538 | ("Storage %qreachable from global is %s (should be %s)", | |
539 | sRef_unparseOpt (fref), | |
540 | alkind_unparse (sRef_getAliasKind (fref)), | |
541 | alkind_unparse (sRef_getAliasKind (tref))), | |
542 | loc)) | |
543 | { | |
544 | sRef_showAliasInfo (fref); | |
545 | } | |
546 | } | |
547 | else if (transferType == TT_FCNRETURN) | |
548 | { | |
549 | if (optgenerror | |
550 | (FLG_COMPMEMPASS, | |
551 | message | |
552 | ("Storage %qreachable from return value is %s (should be %s)", | |
553 | sRef_unparseOpt (fref), | |
554 | alkind_unparse (sRef_getAliasKind (fref)), | |
555 | alkind_unparse (sRef_getAliasKind (tref))), | |
556 | loc)) | |
557 | { | |
558 | sRef_showAliasInfo (fref); | |
559 | } | |
560 | } | |
561 | else if (transferType == TT_GLOBINIT) | |
562 | { | |
563 | if (optgenerror | |
564 | (FLG_COMPMEMPASS, | |
565 | message | |
566 | ("Storage %qreachable from initial value is %s (should be %s)", | |
567 | sRef_unparseOpt (fref), | |
568 | alkind_unparse (sRef_getAliasKind (fref)), | |
569 | alkind_unparse (sRef_getAliasKind (tref))), | |
570 | loc)) | |
571 | { | |
572 | sRef_showAliasInfo (fref); | |
573 | } | |
574 | } | |
575 | else | |
576 | { | |
577 | llcontbug (message ("Transfer type: %s", | |
578 | transferType_unparse (transferType))); | |
579 | ||
580 | if (optgenerror | |
581 | (FLG_COMPMEMPASS, | |
582 | message | |
583 | ("Storage %qreachable from return value is %s (should be %s)", | |
584 | sRef_unparseOpt (fref), | |
585 | alkind_unparse (sRef_getAliasKind (fref)), | |
586 | alkind_unparse (sRef_getAliasKind (tref))), | |
587 | loc)) | |
588 | { | |
589 | sRef_showAliasInfo (fref); | |
590 | } | |
591 | } | |
592 | } | |
593 | ||
594 | if (sRef_isDead (fref)) | |
595 | { | |
596 | if (directUnion) | |
597 | { | |
598 | return NO; | |
599 | } | |
600 | ||
601 | if (transferType == TT_PARAMRETURN) | |
602 | { | |
603 | if (optgenerror | |
604 | (FLG_USERELEASED, | |
605 | message | |
606 | ("Released storage %q reachable from parameter at return point", | |
607 | sRef_unparse (fref)), | |
608 | loc)) | |
609 | { | |
610 | sRef_showStateInfo (fref); | |
611 | return YES; | |
612 | } | |
613 | } | |
614 | else if (transferType == TT_LEAVETRANS) | |
615 | { | |
616 | if (optgenerror | |
617 | (FLG_USERELEASED, | |
618 | message ("Released storage %q reachable from temporary " | |
619 | "reference at scope exit", | |
620 | sRef_unparse (fref)), | |
621 | loc)) | |
622 | { | |
623 | sRef_showStateInfo (fref); | |
624 | return YES; | |
625 | } | |
626 | } | |
627 | else if (transferType == TT_GLOBRETURN) | |
628 | { | |
629 | if (optgenerror | |
630 | (FLG_GLOBSTATE, | |
631 | message ("Released storage %q reachable from global", | |
632 | sRef_unparse (fref)), | |
633 | loc)) | |
634 | { | |
635 | sRef_showStateInfo (fref); | |
636 | return YES; | |
637 | } | |
638 | } | |
639 | else if (transferType == TT_FCNPASS) | |
640 | { | |
641 | if (optgenerror | |
642 | (FLG_USERELEASED, | |
643 | message ("Released storage %q reachable from passed parameter", | |
644 | sRef_unparse (fref)), | |
645 | loc)) | |
646 | { | |
647 | sRef_showStateInfo (fref); | |
648 | return YES; | |
649 | } | |
650 | } | |
651 | else | |
652 | { | |
653 | if (optgenerror | |
654 | (FLG_USERELEASED, | |
655 | message ("Released storage %q reachable from parameter", | |
656 | sRef_unparse (fref)), | |
657 | loc)) | |
658 | { | |
659 | sRef_showStateInfo (fref); | |
660 | return YES; | |
661 | } | |
662 | } | |
663 | } | |
664 | } | |
665 | ||
666 | if (!topLevel | |
667 | && sRef_possiblyNull (fref) | |
668 | && !sRef_perhapsNull (tref) | |
669 | && ctype_isRealPointer (sRef_getType (tref)) | |
670 | && !usymtab_isGuarded (fref)) | |
671 | { | |
672 | if (transferType == TT_FCNRETURN) | |
673 | { | |
674 | if (optgenerror | |
675 | (FLG_NULLRET, | |
676 | message ("%q storage %qderivable from return value: %s", | |
677 | cstring_capitalize (sRef_nullMessage (fref)), | |
678 | sRef_unparseOpt (fref), | |
679 | exprNode_unparse (fexp)), | |
680 | loc)) | |
681 | { | |
682 | sRef_showNullInfo (fref); | |
683 | sRef_setNullError (fref); | |
684 | } | |
685 | } | |
686 | else if (transferType == TT_GLOBRETURN || transferType == TT_PARAMRETURN) | |
687 | { | |
688 | if (optgenerror | |
689 | (FLG_NULLSTATE, | |
690 | message | |
691 | ("Function returns with %s storage derivable from %q %q", | |
692 | sRef_nullMessage (fref), | |
693 | cstring_makeLiteral ((transferType == TT_GLOBRETURN) | |
694 | ? "global" : "parameter"), | |
695 | sRef_unparse (fref)), | |
696 | loc)) | |
697 | { | |
698 | sRef_showNullInfo (fref); | |
699 | sRef_setNullError (fref); | |
700 | } | |
701 | } | |
702 | else if (transferType == TT_GLOBPASS) | |
703 | { | |
704 | if (optgenerror | |
705 | (FLG_NULLPASS, | |
706 | message ("Function called with %s storage " | |
707 | "derivable from global %q", | |
708 | sRef_nullMessage (fref), | |
709 | sRef_unparse (fref)), | |
710 | loc)) | |
711 | { | |
712 | sRef_showNullInfo (fref); | |
713 | sRef_setNullError (fref); | |
714 | } | |
715 | } | |
716 | else if (transferType == TT_FCNPASS) | |
717 | { | |
718 | if (optgenerror | |
719 | (FLG_NULLSTATE, | |
720 | message ("%q storage %qderivable from parameter %q", | |
721 | cstring_capitalize (sRef_nullMessage (fref)), | |
722 | sRef_unparseOpt (fref), | |
723 | generateText (fexp, exprNode_undefined, | |
724 | sRef_undefined, TT_FCNPASS)), | |
725 | loc)) | |
726 | { | |
727 | sRef_showNullInfo (fref); | |
728 | sRef_setNullError (fref); | |
729 | } | |
730 | } | |
731 | else | |
732 | { | |
733 | llassert (transferType == TT_DOASSIGN | |
734 | || transferType == TT_GLOBINIT | |
735 | || transferType == TT_LEAVETRANS); | |
736 | } | |
737 | } | |
738 | ||
739 | if (sRef_isRelDef (tref) | |
740 | || sRef_isPartial (tref) | |
741 | || sRef_isAllocated (tref) | |
742 | || sRef_isStateSpecial (tref)) | |
743 | { | |
744 | /* should check fref is allocated? */ | |
745 | return YES; | |
746 | } | |
747 | ||
748 | ct = ctype_realType (sRef_getType (fref)); | |
749 | ||
750 | if (!(sRef_isAnyDefined (fref) | |
751 | || sRef_isPdefined (fref) | |
752 | || sRef_isAllocated (fref) | |
753 | || sRef_isStateUnknown (fref))) | |
754 | { | |
755 | if (transferType == TT_GLOBRETURN) | |
756 | { | |
757 | if (report | |
758 | && optgenerror | |
759 | (FLG_COMPDEF, | |
760 | message ("Function returns with global %q not " | |
761 | "completely defined%q", | |
762 | sRef_unparse (sRef_getRootBase (fref)), | |
763 | defExpl (fref)), | |
764 | loc)) | |
765 | { | |
766 | sRef_showStateInfo (fref); | |
767 | sRef_setDefined (fref, loc); | |
768 | } | |
769 | } | |
770 | else if (transferType == TT_GLOBPASS) | |
771 | { | |
772 | if (report && | |
773 | optgenerror | |
774 | (FLG_COMPDEF, | |
775 | message | |
776 | ("Function called with global %q not completely defined%q", | |
777 | sRef_unparse (sRef_getRootBase (fref)), | |
778 | defExpl (fref)), | |
779 | loc)) | |
780 | { | |
781 | sRef_showStateInfo (fref); | |
782 | sRef_setDefined (fref, loc); | |
783 | } | |
784 | } | |
785 | else if (transferType == TT_PARAMRETURN) | |
786 | { | |
787 | if (report && !topLevel | |
788 | && optgenerror | |
789 | (FLG_COMPDEF, | |
790 | message ("Function returns storage %q reachable from parameter not " | |
791 | "completely defined%q", | |
792 | sRef_unparse (sRef_getRootBase (fref)), | |
793 | defExpl (fref)), | |
794 | loc)) | |
795 | { | |
796 | sRef_showStateInfo (fref); | |
797 | sRef_setDefined (fref, loc); | |
798 | } | |
799 | } | |
800 | else if (transferType == TT_LEAVETRANS) | |
801 | { | |
802 | if (report && !topLevel | |
803 | && optgenerror | |
804 | (FLG_COMPDEF, | |
805 | message ("Scope exits with storage %q reachable from " | |
806 | "temporary reference not completely defined%q", | |
807 | sRef_unparse (sRef_getRootBase (fref)), | |
808 | defExpl (fref)), | |
809 | loc)) | |
810 | { | |
811 | sRef_showStateInfo (fref); | |
812 | sRef_setDefined (fref, loc); | |
813 | } | |
814 | } | |
815 | else | |
816 | { | |
817 | if (transferType != TT_DOASSIGN | |
818 | && (!(sRef_isNew (fref) || sRef_isType (fref)))) | |
819 | { | |
820 | if (report) | |
821 | { | |
822 | if (sRef_isDead (fref)) | |
823 | { | |
824 | if (optgenerror | |
825 | (FLG_USERELEASED, | |
826 | message ("%s storage %qwas released: %q", | |
827 | transferType_unparse (transferType), | |
828 | sRef_unparseOpt (fref), | |
829 | generateText (fexp, texp, tref, transferType)), | |
830 | loc)) | |
831 | { | |
832 | sRef_showStateInfo (fref); | |
833 | } | |
834 | } | |
835 | else | |
836 | { | |
837 | if (optgenerror | |
838 | (FLG_COMPDEF, | |
839 | message | |
840 | ("%s storage %qnot completely defined%q: %q", | |
841 | transferType_unparse (transferType), | |
842 | sRef_unparseOpt (sRef_getRootBase (fref)), | |
843 | defExpl (fref), | |
844 | generateText (fexp, texp, tref, transferType)), | |
845 | loc)) | |
846 | { | |
847 | sRef rb = sRef_getRootBase (fref); | |
848 | sRef_showStateInfo (fref); | |
849 | sRef_setDefinedComplete (rb, loc); | |
850 | } | |
851 | } | |
852 | } | |
853 | } | |
854 | else | |
855 | { | |
856 | ||
857 | if (sRef_isAllocated (fref) && sRef_isValid (tref) | |
858 | && (transferType == TT_DOASSIGN)) | |
859 | { | |
860 | sRef_setAllocatedComplete (tref, loc); | |
861 | } | |
862 | return YES; | |
863 | } | |
864 | } | |
865 | ||
866 | return NO; | |
867 | } | |
868 | ||
869 | if (ctype_isUnknown (ct)) | |
870 | { | |
871 | return YES; | |
872 | } | |
873 | else if (ctype_isPointer (ct)) | |
874 | { | |
875 | ctype tct = ctype_realType (sRef_getType (tref)); | |
876 | ||
877 | if (sRef_isStateUnknown (fref)) | |
878 | { | |
879 | return NO; | |
880 | } | |
881 | else | |
882 | { | |
883 | if (ctype_isAP (tct) || ctype_isUnknown (tct)) | |
884 | { | |
885 | sRef fptr = sRef_constructDeref (fref); | |
886 | sRef tptr = sRef_constructDeref (tref); | |
887 | ||
888 | return (checkCompletelyDefined (fexp, fptr, texp, tptr, | |
889 | FALSE, inUnion, FALSE, loc, | |
890 | transferType, depth + 1, report)); | |
891 | } | |
892 | else | |
893 | { | |
894 | return YES; | |
895 | } | |
896 | } | |
897 | } | |
898 | else if (ctype_isArray (ct)) | |
899 | { | |
900 | return YES; | |
901 | } | |
902 | else if (ctype_isStruct (ct)) | |
903 | { | |
904 | ctype tct = ctype_realType (sRef_getType (tref)); | |
905 | ||
906 | if (ctype_match (ct, tct)) | |
907 | { | |
908 | bool isOk = TRUE; | |
909 | bool hasOneDefined = FALSE; | |
910 | cstringSList badFields = cstringSList_undefined; | |
911 | ||
912 | if (sRef_isStateUnknown (fref) || sRef_isAllocated (tref)) | |
913 | { | |
914 | return YES; | |
915 | } | |
916 | ||
917 | if (sRef_isPdefined (fref) || sRef_isAnyDefined (fref)) | |
918 | { | |
919 | sRefSet_realElements (sRef_derivedFields (fref), sr) | |
920 | { | |
921 | bool thisField; | |
922 | ||
923 | hasOneDefined = TRUE; | |
924 | ||
925 | if (sRef_isField (sr)) | |
926 | { | |
927 | cstring fieldname = sRef_getField (sr); | |
928 | sRef fldref = sRef_makeField (tref, fieldname); | |
929 | bool shouldCheck = !sRef_isRecursiveField (fldref); | |
930 | ||
931 | if (shouldCheck) | |
932 | { | |
933 | thisField = | |
934 | ynm_toBoolRelaxed | |
935 | (checkCompletelyDefined (fexp, sr, texp, fldref, | |
936 | FALSE, inUnion, FALSE, loc, | |
937 | transferType, depth + 1, | |
938 | FALSE)); | |
939 | } | |
940 | else | |
941 | { | |
942 | thisField = TRUE; | |
943 | } | |
944 | ||
945 | if (!thisField) | |
946 | { | |
947 | isOk = FALSE; | |
948 | badFields = cstringSList_add (badFields, | |
949 | sRef_getField (sr)); | |
950 | } | |
951 | } | |
952 | } end_sRefSet_realElements; | |
953 | } | |
954 | else if (sRef_isAllocated (fref)) | |
955 | { | |
956 | /* | |
957 | ** for structures, each field must be completely defined | |
958 | */ | |
959 | ||
960 | uentryList fields = ctype_getFields (ct); | |
961 | ||
962 | uentryList_elements (fields, ue) | |
963 | { | |
964 | bool thisField; | |
965 | cstring name = uentry_getRealName (ue); | |
966 | sRef ffield = sRef_makeField (fref, name); | |
967 | sRef tfield = sRef_makeField (tref, name); | |
968 | bool shouldCheck = !sRef_isRecursiveField (tfield); | |
969 | ||
970 | if (!shouldCheck) | |
971 | { | |
972 | thisField = TRUE; | |
973 | } | |
974 | else | |
975 | { | |
976 | thisField = ynm_toBoolRelaxed | |
977 | (checkCompletelyDefined (fexp, ffield, texp, tfield, | |
978 | FALSE, inUnion, FALSE, | |
979 | loc, transferType, | |
980 | depth + 1, FALSE)); | |
981 | } | |
982 | ||
983 | if (!thisField) | |
984 | { | |
985 | isOk = FALSE; | |
986 | badFields = cstringSList_add (badFields, uentry_rawName (ue)); | |
987 | } | |
988 | else | |
989 | { | |
990 | hasOneDefined = TRUE; | |
991 | } | |
992 | } end_uentryList_elements; | |
993 | } | |
994 | else | |
995 | { | |
996 | ; | |
997 | } | |
998 | ||
999 | if (!isOk && (!inUnion || hasOneDefined)) | |
1000 | { | |
1001 | if (transferType == TT_GLOBRETURN) | |
1002 | { | |
1003 | if (optgenerror | |
1004 | (FLG_COMPDEF, | |
1005 | message ("Global storage %q contains %d undefined field%p " | |
1006 | "when call returns: %q", | |
1007 | sRef_unparse (fref), | |
1008 | cstringSList_size (badFields), | |
1009 | cstringSList_unparseAbbrev (badFields)), | |
1010 | loc)) | |
1011 | { | |
1012 | sRef_setDefined (fref, loc); | |
1013 | } | |
1014 | } | |
1015 | else if (transferType == TT_GLOBPASS) | |
1016 | { | |
1017 | if (optgenerror | |
1018 | (FLG_COMPDEF, | |
1019 | message ("Global storage %q contains %d undefined field%p " | |
1020 | "before call: %q", | |
1021 | sRef_unparse (fref), | |
1022 | cstringSList_size (badFields), | |
1023 | cstringSList_unparseAbbrev (badFields)), | |
1024 | loc)) | |
1025 | { | |
1026 | sRef_setDefined (fref, loc); | |
1027 | } | |
1028 | } | |
1029 | else if (transferType == TT_PARAMRETURN) | |
1030 | { | |
1031 | if (optgenerror | |
1032 | (FLG_COMPDEF, | |
1033 | message ("Storage %qreachable from parameter " | |
1034 | "contains %d undefined field%p: %q", | |
1035 | sRef_unparseOpt (fref), | |
1036 | cstringSList_size (badFields), | |
1037 | cstringSList_unparseAbbrev (badFields)), | |
1038 | loc)) | |
1039 | { | |
1040 | sRef_setDefined (fref, loc); | |
1041 | } | |
1042 | } | |
1043 | else if (transferType == TT_LEAVETRANS) | |
1044 | { | |
1045 | /* no error */ | |
1046 | } | |
1047 | else | |
1048 | { | |
1049 | if (optgenerror | |
1050 | (FLG_COMPDEF, | |
1051 | message ("%s storage %qcontains %d undefined field%p: %q", | |
1052 | transferType_unparse (transferType), | |
1053 | sRef_unparseOpt (fref), | |
1054 | cstringSList_size (badFields), | |
1055 | cstringSList_unparseAbbrev (badFields)), | |
1056 | loc)) | |
1057 | { | |
1058 | sRef_setDefined (fref, loc); | |
1059 | } | |
1060 | } | |
1061 | } | |
1062 | ||
1063 | cstringSList_free (badFields); | |
1064 | ||
1065 | if (inUnion) | |
1066 | { | |
1067 | if (directUnion) | |
1068 | { | |
1069 | return (ynm_fromBool (hasOneDefined)); | |
1070 | } | |
1071 | else | |
1072 | { | |
1073 | return (MAYBE); | |
1074 | } | |
1075 | } | |
1076 | else | |
1077 | { | |
1078 | return (ynm_fromBool (!report || isOk)); | |
1079 | } | |
1080 | } | |
1081 | else | |
1082 | { | |
1083 | return YES; | |
1084 | } | |
1085 | } | |
1086 | else if (ctype_isUnion (ct)) | |
1087 | { | |
1088 | if (sRef_isStateUnknown (fref) || sRef_isAllocated (tref)) | |
1089 | { | |
1090 | return YES; | |
1091 | } | |
1092 | else | |
1093 | { | |
1094 | ctype tct = ctype_realType (sRef_getType (tref)); | |
1095 | ||
1096 | if (ctype_isKnown (tct) && ctype_match (ct, tct)) | |
1097 | { | |
1098 | cstringSList goodFields = cstringSList_new (); | |
1099 | bool isOk = FALSE; | |
1100 | int nelements = sRefSet_size (sRef_derivedFields (fref)); | |
1101 | ||
1102 | /* | |
1103 | ** for unions, at least one field must be completely defined | |
1104 | */ | |
1105 | ||
1106 | if (sRef_isPdefined (fref) || sRef_isAnyDefined (fref)) | |
1107 | { | |
1108 | isOk = TRUE; | |
1109 | } | |
1110 | ||
1111 | sRefSet_realElements (sRef_derivedFields (fref), sr) | |
1112 | { | |
1113 | bool thisField; | |
1114 | ||
1115 | if (sRef_isField (sr)) | |
1116 | { | |
1117 | sRef fldref = sRef_makeField (tref, sRef_getField (sr)); | |
1118 | ||
1119 | thisField = ynm_toBoolStrict | |
1120 | (checkCompletelyDefined | |
1121 | (fexp, sr, texp, fldref, FALSE, inUnion, | |
1122 | (nelements > 1 ? TRUE : FALSE), | |
1123 | loc, transferType, depth + 1, FALSE)); | |
1124 | ||
1125 | if (thisField) | |
1126 | { | |
1127 | goodFields = cstringSList_add | |
1128 | (goodFields, sRef_getField (sr)); | |
1129 | } | |
1130 | } | |
1131 | } end_sRefSet_realElements; | |
1132 | ||
1133 | if (cstringSList_empty (goodFields) | |
1134 | && !isOk | |
1135 | && context_getFlag (FLG_UNIONDEF)) | |
1136 | { | |
1137 | if (!inUnion) | |
1138 | { | |
1139 | if (transferType == TT_PARAMRETURN) | |
1140 | { | |
1141 | voptgenerror | |
1142 | (FLG_UNIONDEF, | |
1143 | message ("Union %q reachable from parameter has " | |
1144 | "no defined field", | |
1145 | sRef_unparse (fref)), | |
1146 | loc); | |
1147 | } | |
1148 | else if (transferType == TT_LEAVETRANS) | |
1149 | { | |
1150 | voptgenerror | |
1151 | (FLG_UNIONDEF, | |
1152 | message ("Union %q has no defined field at scope exit", | |
1153 | sRef_unparse (fref)), | |
1154 | loc); | |
1155 | } | |
1156 | else if (transferType == TT_DOASSIGN | |
1157 | || transferType == TT_FIELDASSIGN | |
1158 | || transferType == TT_GLOBINIT) | |
1159 | { | |
1160 | ; /* no error */ | |
1161 | } | |
1162 | else | |
1163 | { | |
1164 | voptgenerror | |
1165 | (FLG_UNIONDEF, | |
1166 | message ("%s union %q has no defined field", | |
1167 | transferType_unparse (transferType), | |
1168 | sRef_unparse (fref)), | |
1169 | loc); | |
1170 | } | |
1171 | } | |
1172 | isOk = FALSE; | |
1173 | } | |
1174 | ||
1175 | cstringSList_free (goodFields); | |
1176 | return ynm_fromBool (!report || isOk); | |
1177 | } | |
1178 | } | |
1179 | } | |
1180 | else | |
1181 | { | |
1182 | ; | |
1183 | } | |
1184 | ||
1185 | return YES; | |
1186 | } | |
1187 | ||
1188 | /* | |
1189 | ** fref is being free'd | |
1190 | */ | |
1191 | ||
1192 | typedef enum { | |
1193 | DSC_GLOB, DSC_LOCAL, DSC_PARAM, DSC_STRUCT | |
1194 | } dscCode; | |
1195 | ||
1196 | static /*@observer@*/ cstring dscCode_unparse (dscCode desc) /*@*/ | |
1197 | { | |
1198 | switch (desc) | |
1199 | { | |
1200 | case DSC_GLOB: | |
1201 | return cstring_makeLiteralTemp ("killed global"); | |
1202 | case DSC_LOCAL: | |
1203 | return cstring_makeLiteralTemp ("variable declared in this scope"); | |
1204 | case DSC_PARAM: | |
1205 | return cstring_makeLiteralTemp ("released storage"); | |
1206 | case DSC_STRUCT: | |
1207 | return cstring_makeLiteralTemp ("released structure parameter"); | |
1208 | } | |
1209 | ||
1210 | BADEXIT; | |
1211 | } | |
1212 | ||
1213 | static bool | |
1214 | checkCompletelyDestroyed (exprNode p_fexp, sRef p_fref, bool p_topLevel, | |
1215 | fileloc p_loc, int p_depth, dscCode p_desc); | |
1216 | ||
1217 | bool checkGlobalDestroyed (sRef fref, fileloc loc) | |
1218 | { | |
1219 | return (checkCompletelyDestroyed (exprNode_undefined, fref, TRUE, | |
1220 | loc, 0, DSC_GLOB)); | |
1221 | } | |
1222 | ||
1223 | void checkLocalDestroyed (sRef fref, fileloc loc) | |
1224 | { | |
1225 | if (sRef_isObserver (fref) || sRef_isExposed (fref) | |
1226 | || sRef_isPartial (fref)) | |
1227 | { | |
1228 | ; | |
1229 | } | |
1230 | else | |
1231 | { | |
1232 | (void) checkCompletelyDestroyed (exprNode_undefined, fref, TRUE, | |
1233 | loc, 0, DSC_LOCAL); | |
1234 | } | |
1235 | } | |
1236 | ||
1237 | void checkStructDestroyed (sRef fref, fileloc loc) | |
1238 | { | |
1239 | if (sRef_isObserver (fref) || sRef_isExposed (fref) | |
1240 | || sRef_isPartial (fref)) | |
1241 | { | |
1242 | ; | |
1243 | } | |
1244 | else | |
1245 | { | |
1246 | (void) checkCompletelyDestroyed (exprNode_undefined, fref, TRUE, loc, 0, DSC_STRUCT); | |
1247 | } | |
1248 | } | |
1249 | ||
1250 | static bool | |
1251 | checkCompletelyDestroyed (exprNode fexp, sRef fref, bool topLevel, | |
1252 | fileloc loc, int depth, | |
1253 | dscCode desc) | |
1254 | { | |
1255 | ctype ct; | |
1256 | ||
1257 | if (depth > MAXDEPTH) | |
1258 | { | |
1259 | llquietbug (message ("checkCompletelyDestroyed: too deep: %s / %q", | |
1260 | exprNode_unparse (fexp), | |
1261 | sRef_unparseFull (fref))); | |
1262 | return TRUE; | |
1263 | } | |
1264 | ||
1265 | if (!sRef_isKnown (fref)) return TRUE; | |
1266 | if (usymtab_isProbableNull (fref)) return TRUE; | |
1267 | if (!context_getFlag (FLG_COMPDESTROY)) return TRUE; | |
1268 | if (!context_getFlag (FLG_MUSTFREE)) return TRUE; | |
1269 | ||
1270 | ct = ctype_realType (sRef_getType (fref)); | |
1271 | ||
1272 | if (!topLevel) | |
1273 | { | |
1274 | bool error = FALSE; | |
1275 | ||
1276 | if (sRef_isFresh (fref) || sRef_isOnly (fref)) | |
1277 | { | |
1278 | error = TRUE; | |
1279 | ||
1280 | if (sRef_isDead (fref) | |
1281 | || sRef_isUnuseable (fref) | |
1282 | || sRef_definitelyNull (fref) | |
1283 | || sRef_isObserver (fref) | |
1284 | || sRef_isExposed (fref)) | |
1285 | { | |
1286 | error = FALSE; | |
1287 | } | |
1288 | } | |
1289 | ||
1290 | if (error) | |
1291 | { | |
1292 | if (sRef_isPossiblyDead (fref) || sRef_isRelDef (fref)) | |
1293 | { | |
1294 | if (exprNode_isDefined (fexp)) | |
1295 | { | |
1296 | voptgenerror2 | |
1297 | (FLG_COMPDESTROY, FLG_STRICTDESTROY, | |
1298 | message ("Only storage %q (type %s) derived from %s " | |
1299 | "may not have been released: %s", | |
1300 | sRef_unparse (fref), | |
1301 | ctype_unparse (sRef_getType (fref)), | |
1302 | dscCode_unparse (desc), | |
1303 | exprNode_unparse (fexp)), | |
1304 | loc); | |
1305 | } | |
1306 | else | |
1307 | { | |
1308 | voptgenerror2 | |
1309 | (FLG_COMPDESTROY, FLG_STRICTDESTROY, | |
1310 | message | |
1311 | ("Only storage %q (type %s) derived from %s " | |
1312 | "may not have been released", | |
1313 | sRef_unparse (fref), | |
1314 | ctype_unparse (sRef_getType (fref)), | |
1315 | dscCode_unparse (desc)), | |
1316 | loc); | |
1317 | } | |
1318 | ||
1319 | sRef_kill (fref, loc); /* prevent further errors */ | |
1320 | } | |
1321 | else | |
1322 | { | |
1323 | if (sRef_isStateUndefined (fref)) | |
1324 | { | |
1325 | return TRUE; | |
1326 | } | |
1327 | else | |
1328 | { | |
1329 | if (exprNode_isDefined (fexp)) | |
1330 | { | |
1331 | voptgenerror | |
1332 | (FLG_COMPDESTROY, | |
1333 | message ("Only storage %q (type %s) derived from %s " | |
1334 | "is not released (memory leak): %s", | |
1335 | sRef_unparse (fref), | |
1336 | ctype_unparse (sRef_getType (fref)), | |
1337 | dscCode_unparse (desc), | |
1338 | exprNode_unparse (fexp)), | |
1339 | loc); | |
1340 | } | |
1341 | else | |
1342 | { | |
1343 | voptgenerror | |
1344 | (FLG_COMPDESTROY, | |
1345 | message ("Only storage %q (type %s) derived from %s " | |
1346 | "is not released (memory leak)", | |
1347 | sRef_unparse (fref), | |
1348 | ctype_unparse (sRef_getType (fref)), | |
1349 | dscCode_unparse (desc)), | |
1350 | loc); | |
1351 | } | |
1352 | } | |
1353 | } | |
1354 | ||
1355 | return FALSE; | |
1356 | } | |
1357 | ||
1358 | if (sRef_isAnyDefined (fref) || sRef_isDead (fref) | |
1359 | || (sRef_isPdefined (fref) | |
1360 | && sRefSet_isEmpty (sRef_derivedFields (fref)))) | |
1361 | { | |
1362 | return TRUE; | |
1363 | } | |
1364 | } | |
1365 | ||
1366 | if (ctype_isPointer (ct)) | |
1367 | { | |
1368 | sRef fptr = sRef_constructDeadDeref (fref); | |
1369 | bool res = checkCompletelyDestroyed (fexp, fptr, FALSE, loc, | |
1370 | depth + 1, desc); | |
1371 | ||
1372 | return res; | |
1373 | } | |
1374 | else if (ctype_isArray (ct)) | |
1375 | { | |
1376 | if ((sRef_isStateUnknown (fref) || sRef_isAllocated (fref)) | |
1377 | && !sRef_hasDerived (fref)) | |
1378 | { | |
1379 | /* | |
1380 | ** Bogosity necessary to prevent infinite depth. | |
1381 | */ | |
1382 | ||
1383 | return FALSE; | |
1384 | } | |
1385 | else | |
1386 | { | |
1387 | sRef farr = sRef_constructDeadDeref (fref); | |
1388 | ||
1389 | return (checkCompletelyDestroyed (fexp, farr, FALSE, loc, | |
1390 | depth + 1, desc)); | |
1391 | } | |
1392 | } | |
1393 | else if (ctype_isStruct (ct)) | |
1394 | { | |
1395 | /* | |
1396 | ** for structures, each field must be completely destroyed | |
1397 | */ | |
1398 | ||
1399 | bool isOk = TRUE; | |
1400 | uentryList fields = ctype_getFields (ct); | |
1401 | ||
1402 | if (depth >= MAXDEPTH) | |
1403 | { | |
1404 | llquietbug (message ("checkCompletelyDestroyed (fields): too deep: %s / %q", | |
1405 | exprNode_unparse (fexp), | |
1406 | sRef_unparseFull (fref))); | |
1407 | ||
1408 | return TRUE; | |
1409 | } | |
1410 | else | |
1411 | { | |
1412 | uentryList_elements (fields, ue) | |
1413 | { | |
1414 | sRef field = sRef_makeField (fref, uentry_rawName (ue)); | |
1415 | ||
1416 | /* | |
1417 | ** note order of && operands --- want to report multiple errors | |
1418 | */ | |
1419 | ||
1420 | isOk = (checkCompletelyDestroyed (fexp, field, FALSE, loc, | |
1421 | depth + 1, desc) | |
1422 | && isOk); | |
1423 | } end_uentryList_elements; | |
1424 | } | |
1425 | ||
1426 | return isOk; | |
1427 | } | |
1428 | else | |
1429 | { | |
1430 | return TRUE; | |
1431 | } | |
1432 | } | |
1433 | ||
1434 | void | |
1435 | checkReturnTransfer (exprNode fexp, uentry rval) | |
1436 | { | |
1437 | sRef uref = uentry_getSref (rval); | |
1438 | sRef rref = sRef_makeNew (sRef_getType (uref), uref, cstring_undefined); | |
1439 | ||
1440 | if (sRef_isStateSpecial (rref)) | |
1441 | { | |
1442 | uentry fcn = context_getHeader (); | |
1443 | sRef fref = exprNode_getSref (fexp); | |
1444 | specialClauses clauses = uentry_getSpecialClauses (fcn); | |
1445 | ||
1446 | specialClauses_postElements (clauses, cl) | |
1447 | { | |
1448 | sRefSet refs = specialClause_getRefs (cl); | |
1449 | sRefTest tst = specialClause_getPostTestFunction (cl); | |
1450 | sRefMod modf = specialClause_getReturnEffectFunction (cl); | |
1451 | ||
1452 | sRefSet_elements (refs, el) | |
1453 | { | |
1454 | sRef base = sRef_getRootBase (el); | |
1455 | ||
1456 | if (sRef_isResult (base)) | |
1457 | { | |
1458 | sRef sr = sRef_fixBase (el, fref); | |
1459 | ||
1460 | if (tst != NULL && !(tst (sr))) | |
1461 | { | |
1462 | if (optgenerror | |
1463 | (specialClause_postErrorCode (cl), | |
1464 | message ("%s storage %q corresponds to " | |
1465 | "storage listed in %q clause: %s", | |
1466 | specialClause_postErrorString (cl, sr), | |
1467 | sRef_unparse (sr), | |
1468 | specialClause_unparseKind (cl), | |
1469 | exprNode_unparse (fexp)), | |
1470 | exprNode_loc (fexp))) | |
1471 | { | |
1472 | sRefShower ss = specialClause_getPostTestShower (cl); | |
1473 | ||
1474 | if (ss != NULL) | |
1475 | { | |
1476 | ss (sr); | |
1477 | } | |
1478 | } | |
1479 | } | |
1480 | ||
1481 | if (modf != NULL) | |
1482 | { | |
1483 | modf (sr, exprNode_loc (fexp)); | |
1484 | } | |
1485 | } | |
1486 | else | |
1487 | { | |
1488 | /* | |
1489 | ** Non-results are checked in exit scope. | |
1490 | */ | |
1491 | } | |
1492 | } end_sRefSet_elements ; | |
1493 | } end_specialClauses_postElements ; | |
1494 | ||
1495 | (void) checkTransfer (fexp, fref, | |
1496 | exprNode_undefined, rref, | |
1497 | exprNode_loc (fexp), TT_FCNRETURN); | |
1498 | } | |
1499 | else | |
1500 | { | |
1501 | if (ctype_isRealSU (exprNode_getType (fexp))) | |
1502 | { | |
1503 | sRef fref = exprNode_getSref (fexp); | |
1504 | ||
1505 | checkStructTransfer (exprNode_undefined, rref, | |
1506 | fexp, fref, | |
1507 | exprNode_loc (fexp), | |
1508 | TT_FCNRETURN); | |
1509 | } | |
1510 | else | |
1511 | { | |
1512 | (void) checkTransfer (fexp, exprNode_getSref (fexp), | |
1513 | exprNode_undefined, rref, | |
1514 | exprNode_loc (fexp), TT_FCNRETURN); | |
1515 | } | |
1516 | } | |
1517 | } | |
1518 | ||
1519 | static void | |
1520 | checkPassSpecialClauses (uentry ue, exprNode fexp, sRef fref, int argno) | |
1521 | { | |
1522 | specialClauses clauses = uentry_getSpecialClauses (ue); | |
1523 | ||
1524 | DPRINTF (("Check pass special: %s / %s", | |
1525 | exprNode_unparse (fexp), sRef_unparseFull (fref))); | |
1526 | ||
1527 | specialClauses_preElements (clauses, cl) | |
1528 | { | |
1529 | sRefSet refs = specialClause_getRefs (cl); | |
1530 | sRefTest tst = specialClause_getPreTestFunction (cl); | |
1531 | sRefMod modf = specialClause_getEffectFunction (cl); | |
1532 | ||
1533 | sRefSet_elements (refs, el) | |
1534 | { | |
1535 | sRef base = sRef_getRootBase (el); | |
1536 | ||
1537 | if (sRef_isResult (base)) | |
1538 | { | |
1539 | ; /* nothing to check before */ | |
1540 | } | |
1541 | else if (sRef_isParam (base)) | |
1542 | { | |
1543 | if (sRef_getParam (base) == argno - 1) | |
1544 | { | |
1545 | sRef sb; | |
1546 | ||
1547 | DPRINTF (("Fix base: %s / %s", | |
1548 | sRef_unparseFull (el), | |
1549 | sRef_unparseFull (fref))); | |
1550 | ||
1551 | sb = sRef_fixBase (el, fref); | |
1552 | ||
1553 | if (tst != NULL && !(tst(sb))) | |
1554 | { | |
1555 | voptgenerror | |
1556 | (specialClause_preErrorCode (cl), | |
1557 | message ("%s storage %qcorresponds to " | |
1558 | "storage listed in %q clause of " | |
1559 | "called function: %s", | |
1560 | specialClause_preErrorString (cl, sb), | |
1561 | sRef_unparseOpt (sb), | |
1562 | specialClause_unparseKind (cl), | |
1563 | exprNode_unparse (fexp)), | |
1564 | exprNode_loc (fexp)); | |
1565 | } | |
1566 | ||
1567 | if (modf != NULL) | |
1568 | { | |
1569 | DPRINTF (("Fixing: %s", sRef_unparseFull (sb))); | |
1570 | modf (sb, exprNode_loc (fexp)); | |
1571 | DPRINTF (("==> %s", sRef_unparseFull (sb))); | |
1572 | } | |
1573 | } | |
1574 | } | |
1575 | else | |
1576 | { | |
1577 | BADBRANCH; | |
1578 | } | |
1579 | } end_sRefSet_elements ; | |
1580 | } end_specialClauses_preElements ; | |
1581 | ||
1582 | DPRINTF (("After: %s", sRef_unparseFull (fref))); | |
1583 | } | |
1584 | ||
1585 | /* | |
1586 | ** should not modify arg | |
1587 | */ | |
1588 | ||
1589 | void | |
1590 | checkPassTransfer (exprNode fexp, uentry arg, bool isSpec, | |
1591 | /*@dependent@*/ exprNode fcn, int argno, int totargs) | |
1592 | { | |
1593 | sRef tref = uentry_getSref (arg); | |
1594 | sRef fref = exprNode_getSref (fexp); | |
1595 | bool isOut = FALSE; | |
1596 | bool isPartial = FALSE; | |
1597 | bool isImpOut = FALSE; | |
1598 | ctype ct = uentry_getType (arg); | |
1599 | ||
1600 | DPRINTF (("Check pass: %s -> %s", | |
1601 | sRef_unparseFull (fref), | |
1602 | sRef_unparseFull (tref))); | |
1603 | ||
1604 | atFunction = fcn; | |
1605 | atArgNo = argno; | |
1606 | atNumArgs = totargs; | |
1607 | ||
1608 | if (ctype_isElips (ct)) | |
1609 | { | |
1610 | ct = ctype_unknown; | |
1611 | } | |
1612 | ||
1613 | if (!ctype_isElips (ct) && | |
1614 | (ctype_isVoidPointer (ct) && uentry_isOut (arg) && sRef_isOnly (tref))) | |
1615 | { | |
1616 | if (ctype_isRealAP (ct)) | |
1617 | { | |
1618 | if (sRef_aliasCheckSimplePred (sRef_isDead, fref)) | |
1619 | { | |
1620 | if (optgenerror | |
1621 | (FLG_USERELEASED, | |
1622 | message ("Dead storage %qpassed as out parameter: %s", | |
1623 | sRef_unparseOpt (fref), | |
1624 | exprNode_unparse (fexp)), | |
1625 | exprNode_loc (fexp))) | |
1626 | { | |
1627 | if (sRef_isDead (fref)) | |
1628 | { | |
1629 | sRef_showStateInfo (fref); | |
1630 | } | |
1631 | } | |
1632 | ||
1633 | sRef_setAllocated (fref, exprNode_loc (fexp)); | |
1634 | } | |
1635 | else if (context_getFlag (FLG_STRICTUSERELEASED) | |
1636 | && sRef_aliasCheckSimplePred (sRef_isPossiblyDead, fref)) | |
1637 | { | |
1638 | if (optgenerror2 | |
1639 | (FLG_USERELEASED, FLG_STRICTUSERELEASED, | |
1640 | message ("Possibly dead storage %qpassed as out parameter: %s", | |
1641 | sRef_unparseOpt (fref), | |
1642 | exprNode_unparse (fexp)), | |
1643 | exprNode_loc (fexp))) | |
1644 | { | |
1645 | if (sRef_isPossiblyDead (fref)) | |
1646 | { | |
1647 | sRef_showStateInfo (fref); | |
1648 | } | |
1649 | } | |
1650 | ||
1651 | sRef_setAllocated (fref, exprNode_loc (fexp)); | |
1652 | } | |
1653 | else if (sRef_aliasCheckSimplePred (sRef_isStateUndefined, fref) | |
1654 | || sRef_aliasCheckSimplePred (sRef_isUnuseable, fref)) | |
1655 | { | |
1656 | voptgenerror | |
1657 | (FLG_USEDEF, | |
1658 | message ("Unallocated storage %qpassed as out parameter: %s", | |
1659 | sRef_unparseOpt (fref), | |
1660 | exprNode_unparse (fexp)), | |
1661 | exprNode_loc (fexp)); | |
1662 | ||
1663 | sRef_setAllocated (fref, exprNode_loc (fexp)); | |
1664 | } | |
1665 | else | |
1666 | { | |
1667 | ; | |
1668 | } | |
1669 | } | |
1670 | ||
1671 | (void) checkCompletelyDestroyed (fexp, fref, TRUE, exprNode_loc (fexp), | |
1672 | 0, DSC_PARAM); | |
1673 | ||
1674 | /* make it defined now, so checkTransfer is okay */ | |
1675 | sRef_setDefined (fref, exprNode_loc (fexp)); | |
1676 | } | |
1677 | else if (uentry_isOut (arg)) | |
1678 | { | |
1679 | if (ctype_isRealAP (ct) | |
1680 | && (sRef_isStateUndefined (fref) || sRef_isUnuseable (fref))) | |
1681 | { | |
1682 | voptgenerror | |
1683 | (FLG_USEDEF, | |
1684 | message ("Unallocated storage %qpassed as out parameter: %s", | |
1685 | sRef_unparseOpt (fref), | |
1686 | exprNode_unparse (fexp)), | |
1687 | exprNode_loc (fexp)); | |
1688 | sRef_setAllocated (fref, exprNode_loc (fexp)); | |
1689 | } | |
1690 | isOut = TRUE; | |
1691 | } | |
1692 | else if (uentry_isPartial (arg)) | |
1693 | { | |
1694 | if (ctype_isRealAP (ct) | |
1695 | && (sRef_isStateUndefined (fref) || sRef_isUnuseable (fref))) | |
1696 | { | |
1697 | voptgenerror | |
1698 | (FLG_USEDEF, | |
1699 | message ("Unallocated storage %qpassed as partial parameter: %s", | |
1700 | sRef_unparseOpt (fref), | |
1701 | exprNode_unparse (fexp)), | |
1702 | exprNode_loc (fexp)); | |
1703 | sRef_setAllocated (fref, exprNode_loc (fexp)); | |
1704 | } | |
1705 | isPartial = TRUE; | |
1706 | } | |
1707 | else if (uentry_isStateSpecial (arg)) | |
1708 | { | |
1709 | uentry ue = exprNode_getUentry (fcn); | |
1710 | ||
1711 | if (ctype_isRealAP (ct) | |
1712 | && (sRef_isStateUndefined (fref) || sRef_isUnuseable (fref))) | |
1713 | { | |
1714 | voptgenerror | |
1715 | (FLG_USEDEF, | |
1716 | message ("Unallocated storage %qpassed as special parameter: %s", | |
1717 | sRef_unparseOpt (fref), | |
1718 | exprNode_unparse (fexp)), | |
1719 | exprNode_loc (fexp)); | |
1720 | sRef_setAllocated (fref, exprNode_loc (fexp)); | |
1721 | } | |
1722 | ||
1723 | if (uentry_hasSpecialClauses (ue)) | |
1724 | { | |
1725 | checkPassSpecialClauses (ue, fexp, fref, argno); | |
1726 | } | |
1727 | ||
1728 | return; /* ??? */ | |
1729 | } | |
1730 | else if (sRef_isStateDefined (tref)) | |
1731 | { | |
1732 | exprNode_checkUseParam (fexp); | |
1733 | } | |
1734 | else | |
1735 | { | |
1736 | if (isSpec || (!context_getFlag (FLG_IMPOUTS))) | |
1737 | { | |
1738 | exprNode_checkUseParam (fexp); | |
1739 | } | |
1740 | else | |
1741 | { | |
1742 | if (!sRef_isMacroParamRef (fref) | |
1743 | && (ctype_isRealAP (ct))) | |
1744 | { | |
1745 | if (sRef_isAddress (fref)) | |
1746 | { | |
1747 | if (sRef_isStateUndefined (fref) || sRef_isUnuseable (fref)) | |
1748 | { | |
1749 | voptgenerror | |
1750 | (FLG_USEDEF, | |
1751 | message | |
1752 | ("Unallocated address %qpassed as implicit " | |
1753 | "out parameter: %s", | |
1754 | sRef_unparseOpt (fref), | |
1755 | exprNode_unparse (fexp)), | |
1756 | exprNode_loc (fexp)); | |
1757 | sRef_setAllocated (fref, exprNode_loc (fexp)); | |
1758 | } | |
1759 | } | |
1760 | ||
1761 | /* yes, I really mean this! */ | |
1762 | tref = sRef_copy (tref); | |
1763 | sRef_setAllocated (tref, exprNode_loc (fexp)); | |
1764 | ||
1765 | isOut = TRUE; | |
1766 | isImpOut = TRUE; | |
1767 | } | |
1768 | else | |
1769 | { | |
1770 | exprNode_checkUseParam (fexp); | |
1771 | } | |
1772 | } | |
1773 | } | |
1774 | ||
1775 | if (sRef_isNew (fref)) | |
1776 | { | |
1777 | alkind tkind = sRef_getAliasKind (tref); | |
1778 | ||
1779 | if ((sRef_isFresh (fref) || sRef_isOnly (fref)) | |
1780 | && !alkind_isOnly (tkind) | |
1781 | && !alkind_isKeep (tkind) | |
1782 | && !alkind_isOwned (tkind) | |
1783 | && !alkind_isError (tkind) | |
1784 | && !uentry_isReturned (arg)) | |
1785 | ||
1786 | { | |
1787 | voptgenerror | |
1788 | (FLG_MUSTFREE, | |
1789 | message ("New fresh storage %qpassed as %s (not released): %s", | |
1790 | sRef_unparseOpt (fref), | |
1791 | alkind_unparse (sRef_getAliasKind (tref)), | |
1792 | exprNode_unparse (fexp)), | |
1793 | exprNode_loc (fexp)); | |
1794 | } | |
1795 | else | |
1796 | { | |
1797 | if (sRef_isNewRef (fref) && !sRef_isKillRef (tref)) | |
1798 | { | |
1799 | alkind ak = sRef_getAliasKind (tref); | |
1800 | ||
1801 | if (!alkind_isError (ak)) | |
1802 | { | |
1803 | voptgenerror | |
1804 | (FLG_MUSTFREE, | |
1805 | message ("New reference %qpassed as %s (not released): %s", | |
1806 | sRef_unparseOpt (fref), | |
1807 | alkind_unparse (sRef_getAliasKind (tref)), | |
1808 | exprNode_unparse (fexp)), | |
1809 | exprNode_loc (fexp)); | |
1810 | } | |
1811 | } | |
1812 | } | |
1813 | } | |
1814 | ||
1815 | (void) checkTransfer (fexp, exprNode_getSref (fexp), | |
1816 | exprNode_undefined, tref, | |
1817 | exprNode_loc (fexp), TT_FCNPASS); | |
1818 | ||
1819 | setCodePoint (); | |
1820 | fref = exprNode_getSref (fexp); | |
1821 | ||
1822 | if (isOut && !sRef_isDead (fref) && !sRef_isPossiblyDead (fref)) | |
1823 | { | |
1824 | sRef base; | |
1825 | ||
1826 | if (ctype_isRealAP (sRef_getType (fref))) | |
1827 | { | |
1828 | base = sRef_makePointer (fref); | |
1829 | } | |
1830 | else | |
1831 | { | |
1832 | base = fref; | |
1833 | } | |
1834 | ||
1835 | if (isImpOut) | |
1836 | { | |
1837 | exprNode_checkMSet (fexp, base); | |
1838 | } | |
1839 | else | |
1840 | { | |
1841 | exprNode_checkSet (fexp, base); | |
1842 | } | |
1843 | ||
1844 | if (sRef_isValid (base)) | |
1845 | { | |
1846 | setCodePoint (); | |
1847 | ||
1848 | sRef_clearDerived (base); | |
1849 | sRef_setDefined (base, exprNode_loc (fexp)); | |
1850 | usymtab_clearAlias (base); | |
1851 | sRef_setNullUnknown (base, exprNode_loc (fexp)); | |
1852 | } | |
1853 | } | |
1854 | ||
1855 | if (isPartial) | |
1856 | { | |
1857 | if (sRef_isValid (fref)) | |
1858 | { | |
1859 | sRef_setPartial (fref, exprNode_loc (fexp)); | |
1860 | } | |
1861 | } | |
1862 | ||
1863 | atFunction = exprNode_undefined; | |
1864 | atArgNo = 0; | |
1865 | atNumArgs = 0; | |
1866 | ||
1867 | /* need to fixup here: derived refs could be bogus */ | |
1868 | /* (better to change sRef to not add derivs for "protected" ref) */ | |
1869 | ||
1870 | uentry_fixupSref (arg); | |
1871 | ||
1872 | setCodePoint (); | |
1873 | ||
1874 | DPRINTF (("Check pass: ==> %s", | |
1875 | sRef_unparseFull (fref))); | |
1876 | } | |
1877 | ||
1878 | void | |
1879 | checkGlobReturn (uentry glob) | |
1880 | { | |
1881 | sRef_protectDerivs (); | |
1882 | checkGlobTrans (glob, TT_GLOBRETURN); | |
1883 | sRef_clearProtectDerivs (); | |
1884 | } | |
1885 | ||
1886 | void checkParamReturn (uentry actual) | |
1887 | { | |
1888 | checkLeaveTrans (actual, TT_PARAMRETURN); | |
1889 | } | |
1890 | ||
1891 | void checkLoseRef (uentry actual) | |
1892 | { | |
1893 | checkLeaveTrans (actual, TT_LEAVETRANS); | |
1894 | } | |
1895 | ||
1896 | static void | |
1897 | checkLeaveTrans (uentry actual, transferKind transferType) | |
1898 | { | |
1899 | sRef aref = uentry_getSref (actual); | |
1900 | sRef origref = uentry_getOrigSref (actual); | |
1901 | ||
1902 | if (transferType == TT_PARAMRETURN | |
1903 | && (sRef_isKeep (origref) || sRef_isOnly (origref) | |
1904 | || sRef_isOwned (origref))) | |
1905 | { | |
1906 | /* caller cannot use, nothing to check */ | |
1907 | } | |
1908 | else | |
1909 | { | |
1910 | if (sRef_isNSLocalVar (origref)) | |
1911 | { | |
1912 | ; | |
1913 | } | |
1914 | else | |
1915 | { | |
1916 | (void) checkCompletelyDefined (exprNode_undefined, aref, | |
1917 | exprNode_undefined, origref, | |
1918 | TRUE, FALSE, FALSE, | |
1919 | g_currentloc, transferType, | |
1920 | 0, TRUE); | |
1921 | } | |
1922 | } | |
1923 | } | |
1924 | ||
1925 | static void | |
1926 | checkGlobTrans (uentry glob, transferKind type) | |
1927 | { | |
1928 | sRef eref = uentry_getOrigSref (glob); | |
1929 | ||
1930 | (void) checkCompletelyDefined (exprNode_undefined, uentry_getSref (glob), | |
1931 | exprNode_undefined, eref, | |
1932 | TRUE, FALSE, FALSE, | |
1933 | g_currentloc, type, 0, TRUE); | |
1934 | } | |
1935 | ||
1936 | /* | |
1937 | ** For lhs of assignment, alias kind is set from basic type. | |
1938 | ** Yoikes! | |
1939 | */ | |
1940 | ||
1941 | static void | |
1942 | fixAssignLhs (sRef s) | |
1943 | { | |
1944 | sRef_resetStateComplete (s); | |
1945 | } | |
1946 | ||
1947 | static void checkStructTransfer (exprNode lhs, sRef slhs, exprNode rhs, sRef srhs, | |
1948 | fileloc loc, | |
1949 | transferKind tt) | |
1950 | { | |
1951 | ctype st = ctype_realType (sRef_getType (srhs)); | |
1952 | ||
1953 | if (ctype_isSU (st) && ctype_isRealSU (sRef_getType (slhs)) | |
1954 | && ctype_match (sRef_getType (slhs), st)) | |
1955 | { | |
1956 | if (tt == TT_DOASSIGN && sRef_isStateDefined (srhs)) | |
1957 | { | |
1958 | sRef_setDefinedComplete (slhs, loc); | |
1959 | } | |
1960 | ||
1961 | if (sRef_isDependent (slhs) | |
1962 | || sRef_isObserver (slhs) | |
1963 | || sRef_isExposed (slhs)) | |
1964 | { | |
1965 | ; | |
1966 | } | |
1967 | else | |
1968 | { | |
1969 | if (sRef_isLocalVar (slhs) | |
1970 | && sRef_isGlobal (sRef_getRootBase (srhs))) | |
1971 | { | |
1972 | sRef_setDependent (slhs, exprNode_loc (lhs)); | |
1973 | } | |
1974 | else | |
1975 | { | |
1976 | if (ctype_isUnion (st)) | |
1977 | { | |
1978 | sRef_setDefState (slhs, sRef_getDefState (srhs), | |
1979 | exprNode_loc (lhs)); | |
1980 | ||
1981 | sRefSet_realElements (sRef_derivedFields (srhs), sr) | |
1982 | { | |
1983 | if (sRef_isField (sr)) | |
1984 | { | |
1985 | cstring fieldname = sRef_getField (sr); | |
1986 | sRef lfld = sRef_makeField (slhs, fieldname); | |
1987 | ||
1988 | (void) checkTransfer (rhs, sr, lhs, lfld, | |
1989 | exprNode_loc (lhs), tt); | |
1990 | } | |
1991 | } end_sRefSet_realElements ; | |
1992 | } | |
1993 | else | |
1994 | { | |
1995 | uentryList fields = ctype_getFields (st); | |
1996 | ||
1997 | uentryList_elements (fields, field) | |
1998 | { | |
1999 | sRef rfld = sRef_makeField (srhs, uentry_rawName (field)); | |
2000 | sRef lfld = sRef_makeField (slhs, uentry_rawName (field)); | |
2001 | (void) checkTransfer (rhs, rfld, lhs, lfld, exprNode_loc (lhs), tt); | |
2002 | } end_uentryList_elements ; | |
2003 | } | |
2004 | ||
2005 | if (sRef_isOnly (srhs)) | |
2006 | { | |
2007 | sRef_setKeptComplete (srhs, loc); | |
2008 | } | |
2009 | } | |
2010 | } | |
2011 | } | |
2012 | } | |
2013 | ||
2014 | void | |
2015 | checkInitTransfer (exprNode lhs, exprNode rhs) | |
2016 | { | |
2017 | sRef slhs = exprNode_getSref (lhs); | |
2018 | ||
2019 | if (sRef_isGlobal (slhs) || (!sRef_isCvar (slhs))) | |
2020 | { | |
2021 | (void) checkTransfer (rhs, exprNode_getSref (rhs), | |
2022 | lhs, slhs, exprNode_loc (rhs), TT_GLOBINIT); | |
2023 | } | |
2024 | else | |
2025 | { | |
2026 | checkAssignTransfer (lhs, rhs); | |
2027 | } | |
2028 | } | |
2029 | ||
2030 | void | |
2031 | checkAssignTransfer (exprNode lhs, exprNode rhs) | |
2032 | { | |
2033 | sRef slhs = exprNode_getSref (lhs); | |
2034 | sRef srhs = exprNode_getSref (rhs); | |
2035 | sRef base = sRef_getBaseSafe (slhs); | |
2036 | nstate ns; | |
1ac6313d | 2037 | struct _bbufinfo bs; |
885824d3 | 2038 | |
2039 | DPRINTF (("Check assign: %s = %s", exprNode_unparse (lhs), | |
2040 | exprNode_unparse (rhs))); | |
2041 | DPRINTF (("lhs: %s", sRef_unparseFull (slhs))); | |
2042 | DPRINTF (("rhs: %s", sRef_unparseFull (srhs))); | |
2043 | ||
2044 | if (ctype_isRealSU (sRef_getType (srhs))) | |
2045 | { | |
2046 | checkStructTransfer (lhs, slhs, rhs, srhs, exprNode_loc (lhs), TT_FIELDASSIGN); | |
2047 | } | |
2048 | else | |
2049 | { | |
2050 | (void) checkTransfer (rhs, srhs, lhs, slhs, | |
2051 | exprNode_loc (lhs), TT_DOASSIGN); | |
2052 | } | |
2053 | ||
2054 | if (sRef_isConst (srhs) && sRef_isLocalState (srhs)) | |
2055 | { | |
2056 | /* constants can match anything (e.g., NULL) */ | |
2057 | sRef_setAliasKind (slhs, AK_ERROR, fileloc_undefined); | |
2058 | } | |
2059 | ||
2060 | if (sRef_isValid (base) && sRef_isStateDefined (base)) | |
2061 | { | |
2062 | sRef_setPdefined (base, g_currentloc); | |
2063 | } | |
2064 | ||
2065 | if (sRef_isPartial (srhs)) | |
2066 | { | |
2067 | sRef_setPartial (slhs, exprNode_loc (rhs)); | |
2068 | } | |
2069 | ||
2070 | ||
2071 | ns = sRef_getNullState (srhs); | |
2072 | ||
2073 | if (nstate_possiblyNull (ns)) | |
2074 | { | |
2075 | if (usymtab_isGuarded (srhs)) | |
2076 | { | |
2077 | ns = NS_NOTNULL; | |
2078 | } | |
2079 | } | |
2080 | ||
2081 | sRef_setNullStateInnerComplete (slhs, ns, exprNode_loc (rhs)); | |
2082 | ||
2083 | if (sRef_isExposed (srhs) || sRef_isObserver (srhs)) | |
2084 | { | |
2085 | sRef_setExKind (slhs, sRef_getExKind (srhs), exprNode_loc (rhs)); | |
2086 | } | |
2087 | ||
1ac6313d | 2088 | /* We put the function to transfer NT states */ |
2089 | bs = sRef_getNullTerminatedState (srhs); | |
2090 | sRef_setNullTerminatedStateInnerComplete (slhs, bs, exprNode_loc (rhs)); | |
885824d3 | 2091 | DPRINTF (("Done transfer: %s", sRef_unparseFull (slhs))); |
2092 | } | |
2093 | ||
2094 | static void | |
2095 | checkTransferNullAux (sRef fref, exprNode fexp, /*@unused@*/ bool ffix, | |
2096 | sRef tref, exprNode texp, /*@unused@*/ bool tfix, | |
2097 | fileloc loc, transferKind transferType) | |
2098 | { | |
2099 | alkind tkind = sRef_getAliasKind (tref); | |
2100 | ctype ttyp = ctype_realType (sRef_getType (tref)); | |
2101 | ||
2102 | if (ctype_isUnknown (ttyp)) | |
2103 | { | |
2104 | ttyp = exprNode_getType (texp); | |
2105 | ||
2106 | if (ctype_isUnknown (ttyp)) | |
2107 | { | |
2108 | ttyp = exprNode_getType (fexp); | |
2109 | ||
2110 | if (ctype_isUnknown (ttyp)) | |
2111 | { | |
2112 | ttyp = sRef_getType (fref); | |
2113 | } | |
2114 | } | |
2115 | } | |
2116 | ||
2117 | if (ctype_isFunction (ttyp) && (transferType == TT_FCNRETURN)) | |
2118 | { | |
2119 | ttyp = ctype_returnValue (ttyp); | |
2120 | } | |
2121 | ||
2122 | /* | |
2123 | ** check for null (don't need to check aliases??) | |
2124 | */ | |
2125 | ||
2126 | if (sRef_possiblyNull (fref) | |
2127 | && !usymtab_isGuarded (fref) | |
2128 | && ctype_isRealAP (ttyp)) | |
2129 | { | |
2130 | if (!alkind_isLocal (tkind) && !alkind_isFresh (tkind) | |
2131 | && !sRef_perhapsNull (tref) | |
2132 | && !(transferType == TT_DOASSIGN)) | |
2133 | { | |
2134 | if (transferType == TT_GLOBINIT) | |
2135 | { | |
2136 | if (optgenerror | |
2137 | (FLG_NULLASSIGN, | |
2138 | message ("%s %q initialized to %s value: %q", | |
2139 | sRef_getScopeName (tref), | |
2140 | sRef_unparse (tref), | |
2141 | sRef_nullMessage (fref), | |
2142 | generateText (fexp, texp, tref, transferType)), | |
2143 | loc)) | |
2144 | { | |
2145 | sRef_showNullInfo (fref); | |
2146 | sRef_setNullError (tref); | |
2147 | } | |
2148 | } | |
2149 | else | |
2150 | { | |
2151 | if (optgenerror | |
2152 | ((transferType == TT_FCNPASS) ? FLG_NULLPASS : FLG_NULLRET, | |
2153 | message ("%q storage %q%s: %q", | |
2154 | cstring_capitalize (sRef_nullMessage (fref)), | |
2155 | sRef_unparseOpt (fref), | |
2156 | transferNullMessage (transferType), | |
2157 | generateText (fexp, texp, tref, transferType)), | |
2158 | loc)) | |
2159 | { | |
2160 | sRef_showNullInfo (fref); | |
2161 | sRef_setNullError (fref); | |
2162 | } | |
2163 | } | |
2164 | } | |
2165 | else | |
2166 | { | |
2167 | ; | |
2168 | } | |
2169 | } | |
2170 | } | |
2171 | ||
2172 | ||
2173 | static void | |
2174 | checkTransferAssignAux (sRef fref, exprNode fexp, /*@unused@*/ bool ffix, | |
2175 | sRef tref, exprNode texp, bool tfix, | |
2176 | fileloc loc, transferKind transferType) | |
2177 | { | |
2178 | alkind tkind = sRef_getAliasKind (tref); | |
2179 | ||
2180 | /* | |
2181 | ** Assignment to same --- no errors, or state changes. | |
2182 | ** This can happen when returned params are used. | |
2183 | */ | |
2184 | ||
2185 | if (sRef_sameName (fref, tref)) | |
2186 | { | |
2187 | sRef_copyState (tref, fref); | |
2188 | return; | |
2189 | } | |
2190 | ||
2191 | if ((alkind_isOnly (tkind) || alkind_isFresh (tkind) | |
2192 | || alkind_isNewRef (tkind) || alkind_isOwned (tkind)) | |
2193 | && !(sRef_isDead (tref) | |
2194 | || sRef_isStateUndefined (tref) | |
2195 | || sRef_isUnuseable (tref) | |
2196 | || sRef_isPartial (tref) | |
2197 | || sRef_definitelyNull (tref) | |
2198 | || sRef_isStackAllocated (tref) | |
2199 | || sRef_isAllocIndexRef (tref)) | |
2200 | && !(sRef_same (fref, tref)) /* okay to assign to self (returned params) */ | |
2201 | && !(usymtab_isProbableNull (tref))) | |
2202 | { | |
2203 | if (context_getFlag (FLG_MUSTFREE)) | |
2204 | { | |
2205 | if (canLoseReference (tref, loc)) | |
2206 | { | |
2207 | ; /* no error */ | |
2208 | } | |
2209 | else | |
2210 | { | |
2211 | if (sRef_hasLastReference (tref)) | |
2212 | { | |
2213 | if (optgenerror | |
2214 | (FLG_MUSTFREE, | |
2215 | message ("Last reference %q to %s storage %qnot released " | |
2216 | "before assignment: %q", | |
2217 | sRef_unparse (tref), | |
2218 | alkind_unparse (tkind), | |
2219 | sRef_unparseOpt (sRef_getAliasInfoRef (tref)), | |
2220 | generateText (fexp, texp, tref, transferType)), | |
2221 | loc)) | |
2222 | { | |
2223 | sRef_showRefLost (tref); | |
2224 | } | |
2225 | } | |
2226 | else | |
2227 | { | |
2228 | if (context_inGlobalScope ()) | |
2229 | { | |
2230 | /* no errors for static initializations */ | |
2231 | } | |
2232 | else | |
2233 | { | |
2234 | /* | |
2235 | ** don't report this error for a[i], since it could | |
2236 | ** be a new element. | |
2237 | */ | |
2238 | ||
2239 | if (alkind_isNewRef (tkind)) | |
2240 | { | |
2241 | if (optgenerror | |
2242 | (FLG_MUSTFREE, | |
2243 | message | |
2244 | ("%q %qnot released before assignment: %q", | |
2245 | cstring_makeLiteral | |
2246 | (alkind_isKillRef (sRef_getOrigAliasKind (tref)) | |
2247 | ? "Kill reference parameter" : "New reference"), | |
2248 | sRef_unparseOpt (tref), | |
2249 | generateText (fexp, texp, tref, transferType)), | |
2250 | loc)) | |
2251 | { | |
2252 | sRef_showAliasInfo (tref); | |
2253 | sRef_setAliasKind (tref, AK_ERROR, loc); | |
2254 | } | |
2255 | } | |
2256 | else if | |
2257 | (!(sRef_isUnknownArrayFetch (tref) | |
2258 | && !context_getFlag (FLG_STRICTDESTROY)) | |
2259 | && !sRef_isUnionField (tref) | |
2260 | && !sRef_isRelDef (tref) | |
2261 | && optgenerror | |
2262 | (FLG_MUSTFREE, | |
2263 | message | |
2264 | ("%s storage %qnot released before assignment: %q", | |
2265 | alkind_capName (tkind), | |
2266 | sRef_unparseOpt (tref), | |
2267 | generateText (fexp, texp, tref, transferType)), | |
2268 | loc)) | |
2269 | { | |
2270 | sRef_showAliasInfo (tref); | |
2271 | } | |
2272 | else | |
2273 | { | |
2274 | ; | |
2275 | } | |
2276 | } | |
2277 | } | |
2278 | } | |
2279 | } | |
2280 | } | |
2281 | ||
2282 | fixAssignLhs (tref); | |
2283 | ||
2284 | if (sRef_isRefCounted (tref)) /* tkind might not be correct now */ | |
2285 | { | |
2286 | if (sRef_isNewRef (fref)) | |
2287 | { | |
2288 | sRef_setAliasKind (tref, AK_NEWREF, loc); | |
2289 | } | |
2290 | else if (sRef_isConst (fref)) | |
2291 | { | |
2292 | /* for now, constants are not ref counted */ | |
2293 | sRef_setAliasKind (tref, AK_ERROR, loc); | |
2294 | } | |
2295 | else | |
2296 | { | |
2297 | ; | |
2298 | } | |
2299 | ||
2300 | if (!sRef_isNSLocalVar (tref) | |
2301 | && sRef_isRefCounted (fref) | |
2302 | && sRef_isStateDefined (fref)) | |
2303 | { | |
2304 | voptgenerror | |
2305 | (FLG_NEWREFTRANS, | |
2306 | message ("New reference %qto reference counted storage: %q", | |
2307 | sRef_unparseOpt (tref), | |
2308 | generateText (fexp, texp, tref, transferType)), | |
2309 | loc); | |
2310 | } | |
2311 | } | |
2312 | ||
2313 | /* | |
2314 | ** Not for structures and unions, since assignments copy. | |
2315 | */ | |
2316 | ||
2317 | if (sRef_isStack (fref) | |
2318 | && !ctype_isSU (ctype_realType (sRef_getType (fref)))) | |
2319 | { | |
2320 | sRef_setAliasKindComplete (tref, AK_STACK, loc); | |
2321 | } | |
2322 | ||
2323 | if (sRef_isNSLocalVar (tref) | |
2324 | && !sRef_isOwned (tref) /*< should only apply to static >*/ | |
2325 | && ctype_isMutable (sRef_getType (tref))) | |
2326 | { | |
2327 | if (sRef_isOnly (fref) && sRef_isNew (fref)) | |
2328 | { | |
2329 | if (!tfix) | |
2330 | { | |
2331 | sRef_setFresh (tref, loc); | |
2332 | } | |
2333 | } | |
2334 | } | |
2335 | } | |
2336 | ||
2337 | /* | |
2338 | ** requires sRef_isOnly (fref) | |
2339 | */ | |
2340 | ||
2341 | static void | |
2342 | checkOnlyTransferAux (sRef fref, exprNode fexp, bool ffix, | |
2343 | sRef tref, exprNode texp, /*@unused@*/ bool tfix, | |
2344 | fileloc loc, transferKind transferType) | |
2345 | { | |
2346 | alkind tkind = sRef_getAliasKind (tref); | |
2347 | ||
2348 | if (sRef_isExposed (tref) || sRef_isObserver (tref)) | |
2349 | { | |
2350 | if (transferType == TT_FCNRETURN && sRef_isNew (fref) | |
2351 | && !alkind_isError (tkind)) | |
2352 | { | |
2353 | if (optgenerror | |
2354 | (FLG_ONLYTRANS, | |
2355 | message ("Only storage %q%q (will not be released): %q", | |
2356 | sRef_unparseOpt (fref), | |
2357 | transferErrorMessage (transferType, tkind), | |
2358 | generateText (fexp, texp, tref, transferType)), | |
2359 | loc)) | |
2360 | { | |
2361 | sRef_showAliasInfo (fref); | |
2362 | } | |
2363 | } | |
2364 | ||
2365 | /* no errors for exposed transfers (is this good enough?) */ | |
2366 | } | |
2367 | else if (alkind_isOnly (tkind) || alkind_isKeep (tkind) || alkind_isOwned (tkind)) | |
2368 | { | |
2369 | ; /* okay */ | |
2370 | } | |
2371 | else if ((transferType == TT_FCNPASS) | |
2372 | && (alkind_isUnknown (tkind) | |
2373 | || alkind_isTemp (tkind) || alkind_isUnique (tkind))) | |
2374 | { | |
2375 | if (sRef_isFresh (fref) | |
2376 | && alkind_isUnknown (tkind) && !context_getFlag (FLG_PASSUNKNOWN)) | |
2377 | { | |
2378 | if (!ffix) sRef_setAliasKind (fref, AK_UNKNOWN, loc); | |
2379 | } | |
2380 | } | |
2381 | else if (alkind_isLocal (tkind) | |
2382 | || alkind_isFresh (tkind) || alkind_isUnknown (tkind)) | |
2383 | { | |
2384 | if ((transferType == TT_DOASSIGN) | |
2385 | && sRef_isNew (fref) | |
2386 | && sRef_isOnly (fref)) | |
2387 | { | |
2388 | bool error = FALSE; | |
2389 | ||
2390 | if (alkind_isUnknown (tkind) | |
2391 | && sRef_isGlobal (sRef_getRootBase (tref))) | |
2392 | { | |
2393 | if (optgenerror | |
2394 | (FLG_ONLYUNQGLOBALTRANS, | |
2395 | message ("Only storage %q%q: %q", | |
2396 | sRef_unparseOpt (fref), | |
2397 | transferErrorMessage (transferType, tkind), | |
2398 | generateText (fexp, texp, tref, transferType)), | |
2399 | loc)) | |
2400 | { | |
2401 | sRef_showAliasInfo (fref); | |
2402 | sRef_setAliasKind (tref, AK_ERROR, loc); | |
2403 | error = TRUE; | |
2404 | } | |
2405 | } | |
2406 | ||
2407 | if (!error && !ffix) | |
2408 | { | |
2409 | sRef_setFresh (tref, loc); | |
2410 | } | |
2411 | } | |
2412 | else | |
2413 | { | |
2414 | if (alkind_isLocal (tkind)) | |
2415 | { | |
2416 | if (sRef_sameName (tref, fref)) | |
2417 | { | |
2418 | ; /* don't set this --- corresponds to return transfer */ | |
2419 | } | |
2420 | else | |
2421 | { | |
2422 | /* | |
2423 | ** Don't set local to dependent. Error will | |
2424 | ** be detected through aliasing. Except for | |
2425 | ** arrays. | |
2426 | */ | |
2427 | ||
2428 | if (!tfix && sRef_isThroughArrayFetch (fref) | |
2429 | && context_getFlag (FLG_DEPARRAYS)) | |
2430 | { | |
2431 | sRef_setDependent (tref, loc); | |
2432 | } | |
2433 | } | |
2434 | } | |
2435 | else | |
2436 | { | |
2437 | if (optgenerror | |
2438 | (FLG_ONLYTRANS, | |
2439 | message ("Only storage %q%q: %q", | |
2440 | sRef_unparseOpt (fref), | |
2441 | transferErrorMessage (transferType, tkind), | |
2442 | generateText (fexp, texp, tref, transferType)), | |
2443 | loc)) | |
2444 | { | |
2445 | sRef_showAliasInfo (fref); | |
2446 | } | |
2447 | } | |
2448 | } | |
2449 | } | |
2450 | else | |
2451 | { | |
2452 | if (alkind_isError (tkind) | |
2453 | || (alkind_isUnknown (tkind) && !context_getFlag (FLG_MEMIMPLICIT))) | |
2454 | { | |
2455 | flagcode_recordSuppressed (FLG_ONLYTRANS); | |
2456 | } | |
2457 | else | |
2458 | { | |
2459 | if ((alkind_isKept (tkind) || alkind_isStack (tkind) | |
2460 | || alkind_isDependent (tkind)) | |
2461 | && sRef_isNSLocalVar (tref)) | |
2462 | { | |
2463 | ; /* okay */ | |
2464 | } | |
2465 | else | |
2466 | { | |
2467 | if (optgenerror | |
2468 | (FLG_ONLYTRANS, | |
2469 | message ("Only storage %q%q: %q", | |
2470 | sRef_unparseOpt (fref), | |
2471 | transferErrorMessage (transferType, tkind), | |
2472 | generateText (fexp, texp, tref, transferType)), | |
2473 | loc)) | |
2474 | { | |
2475 | sRef_showAliasInfo (fref); | |
2476 | } | |
2477 | } | |
2478 | } | |
2479 | ||
2480 | if (transferType == TT_DOASSIGN) | |
2481 | { | |
2482 | /* | |
2483 | ** alias kind unknown to suppress future messages | |
2484 | */ | |
2485 | ||
2486 | if (!ffix && sRef_isNSLocalVar (sRef_getRootBase (fref))) | |
2487 | { | |
2488 | sRef_clearAliasKind (fref); | |
2489 | } | |
2490 | } | |
2491 | } | |
2492 | } | |
2493 | ||
2494 | /* | |
2495 | ** ??? same as checkOnly ? | |
2496 | */ | |
2497 | ||
2498 | static void | |
2499 | checkOwnedTransferAux (sRef fref, exprNode fexp, bool ffix, | |
2500 | sRef tref, exprNode texp, bool tfix, | |
2501 | fileloc loc, transferKind transferType) | |
2502 | { | |
2503 | alkind tkind = sRef_getAliasKind (tref); | |
2504 | ||
2505 | if (sRef_isExposed (tref) || sRef_isObserver (tref)) | |
2506 | { | |
2507 | if (transferType == TT_FCNRETURN && sRef_isNew (fref)) | |
2508 | { | |
2509 | if (optgenerror | |
2510 | (FLG_OWNEDTRANS, | |
2511 | message ("Owned storage %q%q (will not be released): %q", | |
2512 | sRef_unparseOpt (fref), | |
2513 | transferErrorMessage (transferType, tkind), | |
2514 | generateText (fexp, texp, tref, transferType)), | |
2515 | loc)) | |
2516 | { | |
2517 | sRef_showAliasInfo (fref); | |
2518 | } | |
2519 | } | |
2520 | } | |
2521 | else if (alkind_isOnly (tkind) || alkind_isKeep (tkind) | |
2522 | || alkind_isDependent (tkind) | |
2523 | || alkind_isOwned (tkind)) | |
2524 | { | |
2525 | /* okay */ | |
2526 | } | |
2527 | else if (alkind_isLocal (tkind) | |
2528 | || alkind_isFresh (tkind) || alkind_isUnknown (tkind)) | |
2529 | { | |
2530 | if ((transferType == TT_DOASSIGN) | |
2531 | && sRef_isNew (fref) && sRef_isOnly (fref)) | |
2532 | { | |
2533 | if (!tfix) | |
2534 | { | |
2535 | sRef_setFresh (tref, loc); | |
2536 | } | |
2537 | } | |
2538 | else | |
2539 | { | |
2540 | } | |
2541 | } | |
2542 | else if ((transferType == TT_FCNPASS) | |
2543 | && (alkind_isUnknown (tkind) | |
2544 | || alkind_isTemp (tkind) || alkind_isUnique (tkind))) | |
2545 | { | |
2546 | if (sRef_isFresh (fref) | |
2547 | && alkind_isUnknown (tkind) && !context_getFlag (FLG_PASSUNKNOWN)) | |
2548 | { | |
2549 | if (!ffix) { sRef_clearAliasKind (fref); } | |
2550 | } | |
2551 | } | |
2552 | else | |
2553 | { | |
2554 | if (alkind_isUnknown (tkind) && !context_getFlag (FLG_MEMIMPLICIT)) | |
2555 | { | |
2556 | flagcode_recordSuppressed (FLG_OWNEDTRANS); | |
2557 | } | |
2558 | else | |
2559 | { | |
2560 | if (alkind_isKept (tkind) && sRef_isNSLocalVar (tref)) | |
2561 | { | |
2562 | ; /* okay */ | |
2563 | } | |
2564 | else | |
2565 | { | |
2566 | voptgenerror | |
2567 | (FLG_OWNEDTRANS, | |
2568 | message ("Owned storage %q%q: %q", | |
2569 | sRef_unparseOpt (fref), | |
2570 | transferErrorMessage (transferType, tkind), | |
2571 | generateText (fexp, texp, tref, transferType)), | |
2572 | loc); | |
2573 | } | |
2574 | } | |
2575 | ||
2576 | if (transferType == TT_DOASSIGN) | |
2577 | { | |
2578 | /* | |
2579 | ** alias kind unknown to suppress future messages | |
2580 | */ | |
2581 | ||
2582 | if (!ffix) { sRef_clearAliasKind (fref); } | |
2583 | } | |
2584 | } | |
2585 | } | |
2586 | ||
2587 | static void | |
2588 | checkFreshTransferAux (sRef fref, exprNode fexp, bool ffix, | |
2589 | sRef tref, exprNode texp, /*@unused@*/ bool tfix, | |
2590 | fileloc loc, transferKind transferType) | |
2591 | { | |
2592 | alkind tkind = sRef_getAliasKind (tref); | |
2593 | ||
2594 | /* | |
2595 | ** error to return fresh as non-only | |
2596 | */ | |
2597 | ||
2598 | if (transferType == TT_FCNRETURN | |
2599 | && !(alkind_isOnly (tkind) || alkind_isNewRef (tkind))) | |
2600 | { | |
2601 | if (alkind_isUnknown (tkind) && !context_getFlag (FLG_MEMIMPLICIT)) | |
2602 | { | |
2603 | flagcode_recordSuppressed (FLG_NEWREFTRANS); | |
2604 | } | |
2605 | else | |
2606 | { | |
2607 | if (alkind_isError (tkind)) | |
2608 | { | |
2609 | if (!ffix) | |
2610 | { | |
2611 | sRef_killComplete (fref, loc); | |
2612 | } | |
2613 | } | |
2614 | else if (alkind_isRefCounted (tkind)) | |
2615 | { | |
2616 | if (optgenerror | |
2617 | (FLG_NEWREFTRANS, | |
2618 | message | |
2619 | ("New reference returned without newref qualifier: %q", | |
2620 | generateText (fexp, texp, tref, transferType)), | |
2621 | loc)) | |
2622 | { | |
2623 | sRef_showAliasInfo (fref); | |
2624 | sRef_killComplete (fref, loc); | |
2625 | } | |
2626 | } | |
2627 | else | |
2628 | { | |
2629 | if (optgenerror | |
2630 | (FLG_FRESHTRANS, | |
2631 | message ("Fresh storage %q (should be only): %q", | |
2632 | transferErrorMessage (transferType, tkind), | |
2633 | generateText (fexp, texp, tref, transferType)), | |
2634 | loc)) | |
2635 | { | |
2636 | sRef_showAliasInfo (fref); | |
2637 | sRef_killComplete (fref, loc); | |
2638 | } | |
2639 | } | |
2640 | } | |
2641 | } | |
2642 | ||
2643 | /* | |
2644 | ** Okay to assign fresh to only, shared or unqualified. | |
2645 | ** | |
2646 | ** should generate other errors? | |
2647 | */ | |
2648 | ||
2649 | if (alkind_isOnly (tkind)) | |
2650 | { | |
2651 | if (transferType == TT_DOASSIGN && !sRef_isGlobal (tref)) | |
2652 | { | |
2653 | if (!ffix) | |
2654 | { | |
2655 | if (!sRef_isNSLocalVar (tref)) | |
2656 | { | |
2657 | sRef_setKeptComplete (fref, loc); | |
2658 | } | |
2659 | } | |
2660 | } | |
2661 | else | |
2662 | { | |
2663 | if (sRef_isConst (fref)) | |
2664 | { | |
2665 | ; | |
2666 | } | |
2667 | else | |
2668 | { | |
2669 | if (!ffix) | |
2670 | { | |
2671 | sRef_killComplete (fref, loc); | |
2672 | } | |
2673 | } | |
2674 | } | |
2675 | } | |
2676 | else if (alkind_isOwned (tkind)) | |
2677 | { | |
2678 | if (!ffix) | |
2679 | { | |
2680 | sRef_setDependentComplete (fref, loc); | |
2681 | } | |
2682 | } | |
2683 | else if (alkind_isRefCounted (tkind) | |
2684 | && (transferType == TT_FCNRETURN) && sRef_isFresh (fref)) | |
2685 | { | |
2686 | if (!ffix) | |
2687 | { | |
2688 | sRef_killComplete (fref, loc); | |
2689 | } | |
2690 | } | |
2691 | else if (alkind_isKeep (tkind)) | |
2692 | { | |
2693 | if (!ffix) | |
2694 | { | |
2695 | if (!sRef_isNSLocalVar (tref)) | |
2696 | { | |
2697 | sRef_setKeptComplete (fref, loc); | |
2698 | } | |
2699 | } | |
2700 | } | |
2701 | else if (alkind_isShared (tkind)) | |
2702 | { | |
2703 | if (!ffix) { sRef_setShared (fref, loc); } | |
2704 | } | |
2705 | else if (alkind_isLocal (tkind) || alkind_isUnknown (tkind)) | |
2706 | { | |
2707 | if (transferType == TT_DOASSIGN || transferType == TT_FCNRETURN) | |
2708 | { | |
2709 | /* | |
2710 | ** local shares fresh. Make it owned/dependent. | |
2711 | */ | |
2712 | ||
2713 | if (!tfix) | |
2714 | { | |
2715 | sRef_setOwned (tref, loc); | |
2716 | } | |
2717 | ||
2718 | if (!ffix && !tfix) | |
2719 | { | |
2720 | sRef_setDependentComplete (fref, loc); | |
2721 | } | |
2722 | ||
2723 | /* NO! sRef_clearAliasKind (fref); */ | |
2724 | } | |
2725 | else | |
2726 | { | |
2727 | if (context_getFlag (FLG_PASSUNKNOWN)) | |
2728 | { | |
2729 | sRef_clearAliasKind (fref); | |
2730 | } | |
2731 | } | |
2732 | } | |
2733 | else | |
2734 | { | |
2735 | ; | |
2736 | } | |
2737 | } | |
2738 | ||
2739 | static void | |
2740 | checkTransferExposure (sRef fref, exprNode fexp, /*@unused@*/ bool ffix, | |
2741 | sRef tref, exprNode texp, bool tfix, | |
2742 | fileloc loc, | |
2743 | transferKind transferType) | |
2744 | { | |
2745 | alkind fkind = sRef_getAliasKind (fref); | |
2746 | alkind tkind = sRef_getAliasKind (tref); | |
2747 | exkind tekind = sRef_getExKind (tref); | |
2748 | ||
2749 | if (sRef_isObserver (fref) && ctype_isMutable (sRef_getType (fref))) | |
2750 | { | |
2751 | /* | |
2752 | ** observer -> exposed or observer | |
2753 | */ | |
2754 | ||
2755 | /* | |
2756 | ** observer -> temp is okay [NO! really? only in function calls] | |
2757 | */ | |
2758 | ||
2759 | if (sRef_isExposed (tref) || sRef_isObserver (tref) | |
2760 | || alkind_isLocal (tkind)) | |
2761 | { | |
2762 | /* okay */ | |
2763 | ||
2764 | if ((transferType == TT_DOASSIGN) && alkind_isLocal (tkind)) | |
2765 | { | |
2766 | if (!tfix) { sRef_setAliasKindComplete (tref, fkind, loc); } | |
2767 | } | |
2768 | } | |
2769 | else | |
2770 | { | |
2771 | if (transferType == TT_FCNRETURN | |
2772 | || transferType == TT_DOASSIGN | |
2773 | || transferType == TT_FIELDASSIGN | |
2774 | || transferType == TT_GLOBINIT) | |
2775 | { | |
2776 | bool hasError = FALSE; | |
2777 | ||
2778 | if (exprNode_isStringLiteral (fexp) | |
2779 | && transferType == TT_GLOBINIT) | |
2780 | { | |
2781 | hasError = optgenerror | |
2782 | (FLG_READONLYTRANS, | |
2783 | message ("Read-only string literal storage %q%q: %q", | |
2784 | sRef_unparseOpt (fref), | |
2785 | transferErrorExpMessage (transferType, tekind), | |
2786 | generateText (fexp, texp, tref, transferType)), | |
2787 | loc); | |
2788 | ||
2789 | sRef_setAliasKind (fref, AK_ERROR, fileloc_undefined); | |
2790 | } | |
2791 | else | |
2792 | { | |
2793 | if ((transferType == TT_DOASSIGN | |
2794 | || transferType == TT_FIELDASSIGN) | |
2795 | && (sRef_isNSLocalVar (tref) | |
2796 | || (exprNode_isStringLiteral (fexp) | |
2797 | && ctype_isRealArray (exprNode_getType (texp))))) | |
2798 | { | |
2799 | ; /* No error for local assignment or assignment | |
2800 | to static array (copies string). */ | |
2801 | } | |
2802 | else | |
2803 | { | |
2804 | if (exprNode_isStringLiteral (fexp)) | |
2805 | { | |
2806 | hasError = optgenerror | |
2807 | (FLG_READONLYTRANS, | |
2808 | message | |
2809 | ("Read-only string literal storage %q%q: %q", | |
2810 | sRef_unparseOpt (fref), | |
2811 | transferErrorExpMessage (transferType, tekind), | |
2812 | generateText (fexp, texp, tref, transferType)), | |
2813 | loc); | |
2814 | ||
2815 | } | |
2816 | ||
2817 | if (!hasError) | |
2818 | { | |
2819 | hasError = optgenerror | |
2820 | (FLG_OBSERVERTRANS, | |
2821 | message | |
2822 | ("Observer storage %q%q: %q", | |
2823 | sRef_unparseOpt (fref), | |
2824 | transferErrorExpMessage (transferType, tekind), | |
2825 | generateText (fexp, texp, tref, transferType)), | |
2826 | loc); | |
2827 | } | |
2828 | } | |
2829 | } | |
2830 | ||
2831 | if (hasError) | |
2832 | { | |
2833 | if (transferType != TT_GLOBINIT) | |
2834 | { | |
2835 | sRef_showExpInfo (fref); | |
2836 | sRef_setAliasKind (tref, AK_ERROR, loc); | |
2837 | } | |
2838 | } | |
2839 | else | |
2840 | { | |
2841 | if (transferType == TT_DOASSIGN && !tfix) | |
2842 | { | |
2843 | DPRINTF (("Setting unknown!")); | |
2844 | /* sRef_setAliasKind (tref, AK_ERROR, loc); */ | |
2845 | } | |
2846 | } | |
2847 | } | |
2848 | else /* TT_FCNPASS */ | |
2849 | { | |
2850 | llassert (transferType == TT_FCNPASS); | |
2851 | ||
2852 | if (alkind_isTemp (tkind) | |
2853 | || alkind_isDependent (tkind) | |
2854 | || alkind_isRefCounted (tkind)) | |
2855 | { | |
2856 | ; /* okay */ | |
2857 | } | |
2858 | else | |
2859 | { | |
2860 | if (!alkind_isError (tkind)) | |
2861 | { | |
2862 | if (optgenerror | |
2863 | (FLG_OBSERVERTRANS, | |
2864 | message ("Observer storage %q%q: %q", | |
2865 | sRef_unparseOpt (fref), | |
2866 | transferErrorMessage (transferType, tkind), | |
2867 | generateText (fexp, texp, tref, transferType)), | |
2868 | loc)) | |
2869 | { | |
2870 | sRef_showExpInfo (fref); | |
2871 | sRef_clearAliasState (fref, loc); | |
2872 | } | |
2873 | } | |
2874 | } | |
2875 | } | |
2876 | } | |
2877 | } | |
2878 | else if (sRef_isExposed (fref) && ctype_isMutable (sRef_getType (fref))) | |
2879 | { | |
2880 | if (transferType == TT_FCNRETURN) | |
2881 | { | |
2882 | if (!(sRef_isExposed (tref) || sRef_isObserver (tref) | |
2883 | || sRef_isParam (fref))) | |
2884 | { | |
2885 | if (optgenerror | |
2886 | (FLG_EXPOSETRANS, | |
2887 | message ("Exposed storage %q%q: %q", | |
2888 | sRef_unparseOpt (fref), | |
2889 | transferErrorExpMessage (transferType, tekind), | |
2890 | generateText (fexp, texp, tref, transferType)), | |
2891 | loc)) | |
2892 | { | |
2893 | sRef_showExpInfo (fref); | |
2894 | } | |
2895 | } | |
2896 | } | |
2897 | else if (transferType == TT_FCNPASS) | |
2898 | { | |
2899 | if (!(sRef_isExposed (tref) | |
2900 | || sRef_isObserver (tref) | |
2901 | || (alkind_isUnknown (tkind) | |
2902 | || alkind_isDependent (tkind) | |
2903 | || alkind_isTemp (tkind) | |
2904 | || alkind_isKillRef (tkind) | |
2905 | || alkind_isRefCounted (tkind)))) | |
2906 | { | |
2907 | if (alkind_isUnique (tkind) || alkind_isError (tkind)) | |
2908 | { | |
2909 | } | |
2910 | else | |
2911 | { | |
2912 | if (optgenerror | |
2913 | (FLG_EXPOSETRANS, | |
2914 | message ("Exposed storage %q%q: %q", | |
2915 | sRef_unparseOpt (fref), | |
2916 | transferErrorMessage (transferType, tkind), | |
2917 | generateText (fexp, texp, tref, transferType)), | |
2918 | loc)) | |
2919 | { | |
2920 | sRef_showExpInfo (fref); | |
2921 | sRef_clearAliasState (fref, loc); | |
2922 | } | |
2923 | } | |
2924 | ||
2925 | } | |
2926 | else | |
2927 | { | |
2928 | ; | |
2929 | } | |
2930 | } | |
2931 | else if (transferType == TT_DOASSIGN) | |
2932 | { | |
2933 | if (!(sRef_isExposed (tref) | |
2934 | || !sRef_isCvar (tref) | |
2935 | || (alkind_isUnknown (tkind) | |
2936 | || alkind_isDependent (tkind) | |
2937 | || alkind_isRefCounted (tkind) | |
2938 | || alkind_isNewRef (tkind) | |
2939 | || alkind_isFresh (tkind) | |
2940 | || alkind_isLocal (tkind)))) | |
2941 | { | |
2942 | if (optgenerror | |
2943 | (FLG_EXPOSETRANS, | |
2944 | message ("Exposed storage %q%q: %q", | |
2945 | sRef_unparseOpt (fref), | |
2946 | transferErrorExpMessage (transferType, tekind), | |
2947 | generateText (fexp, texp, tref, transferType)), | |
2948 | loc)) | |
2949 | { | |
2950 | sRef_showExpInfo (fref); | |
2951 | } | |
2952 | } | |
2953 | if (!tfix) { sRef_setExposed (tref, loc); } | |
2954 | } | |
2955 | else | |
2956 | { | |
2957 | llassert (transferType == TT_GLOBPASS | |
2958 | || transferType == TT_GLOBRETURN | |
2959 | || transferType == TT_PARAMRETURN | |
2960 | || transferType == TT_LEAVETRANS | |
2961 | || transferType == TT_GLOBINIT); | |
2962 | } | |
2963 | } | |
2964 | else | |
2965 | { | |
2966 | ; | |
2967 | } | |
2968 | } | |
2969 | ||
2970 | /* | |
2971 | ** returns TRUE if there is no error reported | |
2972 | ** | |
2973 | ** if fixt, don't change tref (except if error reported.) | |
2974 | ** if fixf, don't change fref (except if error reported.) | |
2975 | */ | |
2976 | ||
2977 | static void | |
2978 | checkTransferAux (exprNode fexp, sRef fref, bool ffix, | |
2979 | exprNode texp, sRef tref, bool tfix, | |
2980 | fileloc loc, transferKind transferType) | |
2981 | { | |
2982 | alkind fkind; | |
2983 | alkind tkind; | |
2984 | bool isassign = (transferType == TT_DOASSIGN); | |
2985 | bool isfieldassign = (transferType == TT_FIELDASSIGN); | |
2986 | bool iseitherassign = isassign || (transferType == TT_FIELDASSIGN); | |
2987 | bool isfcnpass = (transferType == TT_FCNPASS); | |
2988 | bool isfcnreturn = (transferType == TT_FCNRETURN); | |
2989 | ||
2990 | setCodePoint (); | |
2991 | ||
1ac6313d | 2992 | /*start modification David Larochelle */ |
2993 | ||
2994 | if (!ffix && !tfix) | |
2995 | { | |
2996 | setCodePoint (); | |
2997 | checkTransferNullTerminatedAux (fref, fexp, ffix, tref, texp, tfix, | |
2998 | loc, transferType); | |
2999 | } | |
3000 | /*end modification */ | |
3001 | ||
885824d3 | 3002 | if (!ffix && !tfix) |
3003 | { | |
3004 | setCodePoint (); | |
3005 | checkTransferNullAux (fref, fexp, ffix, tref, texp, tfix, | |
3006 | loc, transferType); | |
3007 | } | |
3008 | ||
3009 | if (isassign) | |
3010 | { | |
3011 | setCodePoint (); | |
3012 | checkTransferAssignAux (fref, fexp, ffix, tref, texp, tfix, | |
3013 | loc, transferType); | |
3014 | } | |
3015 | ||
3016 | /* | |
3017 | ** Check for definition | |
3018 | */ | |
3019 | ||
3020 | /* | |
3021 | ** errors passing out params already detected in checkAnyCall | |
3022 | */ | |
3023 | ||
3024 | if (!ffix && !tfix) | |
3025 | { | |
3026 | bool defok = TRUE; | |
3027 | ||
3028 | if (!iseitherassign | |
3029 | || (!sRef_isNSLocalVar (tref) | |
3030 | && (sRef_isAnyDefined (tref) || !sRef_stateKnown (tref)))) | |
3031 | { | |
3032 | setCodePoint (); | |
3033 | ||
3034 | if (!ynm_toBoolRelaxed | |
3035 | (checkCompletelyDefined (fexp, fref, texp, tref, | |
3036 | TRUE, FALSE, FALSE, | |
3037 | loc, transferType, 0, TRUE))) | |
3038 | { | |
3039 | defok = FALSE; | |
3040 | } | |
3041 | } | |
3042 | ||
3043 | setCodePoint (); | |
3044 | ||
3045 | if (defok && iseitherassign) | |
3046 | { | |
3047 | sRef_setDefState (tref, sRef_getDefState (fref), loc); | |
3048 | } | |
3049 | } | |
3050 | ||
3051 | ||
3052 | /* | |
3053 | ** check exposure | |
3054 | */ | |
3055 | ||
3056 | setCodePoint (); | |
3057 | checkTransferExposure (fref, fexp, ffix, tref, texp, tfix, | |
3058 | loc, transferType); | |
3059 | ||
3060 | fkind = sRef_getAliasKind (fref); | |
3061 | tkind = sRef_getAliasKind (tref); | |
3062 | ||
3063 | /* | |
3064 | ** check aliasing | |
3065 | */ | |
3066 | ||
3067 | if (alkind_isOnly (fkind)) | |
3068 | { | |
3069 | setCodePoint (); | |
3070 | checkOnlyTransferAux (fref, fexp, ffix, | |
3071 | tref, texp, tfix, | |
3072 | loc, transferType); | |
3073 | } | |
3074 | else if (alkind_isFresh (fkind)) | |
3075 | { | |
3076 | setCodePoint (); | |
3077 | checkFreshTransferAux (fref, fexp, ffix, | |
3078 | tref, texp, tfix, | |
3079 | loc, transferType); | |
3080 | } | |
3081 | else if (alkind_isOwned (fkind)) | |
3082 | { | |
3083 | setCodePoint (); | |
3084 | checkOwnedTransferAux (fref, fexp, ffix, | |
3085 | tref, texp, tfix, | |
3086 | loc, transferType); | |
3087 | } | |
3088 | else if (alkind_isDependent (fkind)) | |
3089 | { | |
3090 | setCodePoint (); | |
3091 | if (isfcnreturn && | |
3092 | (sRef_isExposed (tref) || sRef_isObserver (tref))) | |
3093 | { | |
3094 | ; /* okay */ | |
3095 | } | |
3096 | else if ((alkind_isOnly (tkind) || alkind_isKeep (tkind) | |
3097 | || alkind_isOwned (tkind)) | |
3098 | || (!isfcnpass && alkind_isTemp (tkind))) | |
3099 | { | |
3100 | bool error = TRUE; | |
3101 | ||
3102 | if (sRef_isLocalVar (fref)) | |
3103 | { | |
3104 | sRef depRef = dependentReference (fref); | |
3105 | ||
3106 | if (sRef_isValid (depRef) && sRef_isLocalVar (depRef)) | |
3107 | { | |
3108 | error = FALSE; | |
3109 | sRef_kill (depRef, loc); | |
3110 | sRef_kill (fref, loc); | |
3111 | } | |
3112 | ||
3113 | } | |
3114 | ||
3115 | if (isfieldassign) | |
3116 | { | |
3117 | error = FALSE; | |
3118 | } | |
3119 | ||
3120 | if (canLoseLocalReference (fref, loc)) | |
3121 | { | |
3122 | ; | |
3123 | } | |
3124 | else | |
3125 | { | |
3126 | if (error && | |
3127 | (optgenerror | |
3128 | (FLG_DEPENDENTTRANS, | |
3129 | message ("%s storage %q%q: %q", | |
3130 | alkind_capName (fkind), | |
3131 | sRef_unparseOpt (fref), | |
3132 | transferErrorMessage (transferType, tkind), | |
3133 | generateText (fexp, texp, tref, transferType)), | |
3134 | loc))) | |
3135 | { | |
3136 | DPRINTF (("Here: %s / %s", | |
3137 | sRef_unparseFull (fref), | |
3138 | sRef_unparseFull (tref))); | |
3139 | ||
3140 | sRef_showAliasInfo (fref); | |
3141 | } | |
3142 | } | |
3143 | } | |
3144 | else | |
3145 | { | |
3146 | if (isassign && (alkind_isFresh (tkind) || alkind_isLocal (tkind))) | |
3147 | { | |
3148 | if (!tfix && !ffix) | |
3149 | { | |
3150 | sRef_setDependent (tref, loc); | |
3151 | } | |
3152 | } | |
3153 | } | |
3154 | } | |
3155 | else if (alkind_isShared (fkind)) | |
3156 | { | |
3157 | setCodePoint (); | |
3158 | /* | |
3159 | ** xxx <- shared | |
3160 | */ | |
3161 | ||
3162 | if (alkind_isOnly (tkind) | |
3163 | || (!isfcnpass | |
3164 | && (!(sRef_isObserver (tref) || sRef_isExposed (tref)) | |
3165 | && alkind_isTemp (tkind)))) | |
3166 | { | |
3167 | if (optgenerror | |
3168 | (FLG_SHAREDTRANS, | |
3169 | message ("%s storage %q%q: %q", | |
3170 | alkind_capName (fkind), | |
3171 | sRef_unparseOpt (fref), | |
3172 | transferErrorMessage (transferType, tkind), | |
3173 | generateText (fexp, texp, tref, transferType)), | |
3174 | loc)) | |
3175 | { | |
3176 | sRef_showAliasInfo (fref); | |
3177 | } | |
3178 | } | |
3179 | else | |
3180 | { | |
3181 | if (alkind_isFresh (tkind) || alkind_isLocal (tkind)) | |
3182 | { | |
3183 | sRef_setShared (tref, loc); | |
3184 | } | |
3185 | } | |
3186 | } | |
3187 | else if (alkind_isKeep (fkind)) | |
3188 | { | |
3189 | setCodePoint (); | |
3190 | ||
3191 | if (alkind_isKeep (tkind) | |
3192 | || alkind_isLocal (tkind) | |
3193 | || (isfcnreturn && sRef_isExposed (tref)) | |
3194 | || (iseitherassign | |
3195 | && (alkind_isOnly (tkind) || alkind_isOwned (tkind)))) | |
3196 | { | |
3197 | sRef_setKept (fref, loc); | |
3198 | } | |
3199 | else if (isfcnpass | |
3200 | && (alkind_isTemp (tkind) || alkind_isOwned (tkind))) | |
3201 | { | |
3202 | ; | |
3203 | } | |
3204 | else | |
3205 | { | |
3206 | if (!alkind_isError (tkind)) | |
3207 | { | |
3208 | if (optgenerror | |
3209 | (FLG_KEEPTRANS, | |
3210 | message ("%s storage %q: %q", | |
3211 | alkind_capName (fkind), | |
3212 | transferErrorMessage (transferType, tkind), | |
3213 | generateText (fexp, texp, tref, transferType)), | |
3214 | loc)) | |
3215 | { | |
3216 | sRef_showAliasInfo (fref); | |
3217 | } | |
3218 | } | |
3219 | } | |
3220 | } | |
3221 | else if (alkind_isTemp (fkind) || alkind_isKept (fkind)) | |
3222 | { | |
3223 | /* | |
3224 | ** xxx <- temp | |
3225 | */ | |
3226 | ||
3227 | if (alkind_isOnly (tkind) | |
3228 | || alkind_isShared (tkind) | |
3229 | || (alkind_isTemp (fkind) | |
3230 | && !isfcnreturn && alkind_isDependent (tkind)) | |
3231 | || alkind_isOwned (tkind) | |
3232 | || alkind_isKeep (tkind)) | |
3233 | { | |
3234 | if (!exprNode_isNullValue (fexp) | |
3235 | && (ctype_isMutable (exprNode_getType (fexp)) | |
3236 | || (ctype_isArray (exprNode_getType (fexp)) | |
3237 | && sRef_isParam (fref))) | |
3238 | && (!iseitherassign || sRef_isReference (tref))) | |
3239 | { | |
3240 | if (sRef_isThroughArrayFetch (fref)) | |
3241 | { | |
3242 | if (optgenerror2 | |
3243 | (alkind_isTemp (fkind) ? FLG_TEMPTRANS : FLG_KEPTTRANS, | |
3244 | FLG_STRICTUSERELEASED, | |
3245 | message ("%s storage %q%q: %q", | |
3246 | alkind_capName (fkind), | |
3247 | sRef_unparseOpt (fref), | |
3248 | transferErrorMessage (transferType, tkind), | |
3249 | generateText (fexp, texp, tref, transferType)), | |
3250 | loc)) | |
3251 | { | |
3252 | sRef_showAliasInfo (fref); | |
3253 | } | |
3254 | } | |
3255 | else | |
3256 | { | |
3257 | if (optgenerror | |
3258 | (alkind_isTemp (fkind) ? FLG_TEMPTRANS : FLG_KEPTTRANS, | |
3259 | message ("%s storage %q%q: %q", | |
3260 | alkind_capName (fkind), | |
3261 | sRef_unparseOpt (fref), | |
3262 | transferErrorMessage (transferType, tkind), | |
3263 | generateText (fexp, texp, tref, transferType)), | |
3264 | loc)) | |
3265 | { | |
3266 | sRef_showAliasInfo (fref); | |
3267 | } | |
3268 | } | |
3269 | } | |
3270 | } | |
3271 | } | |
3272 | else if (alkind_isRefCounted (fkind) || alkind_isKillRef (fkind)) | |
3273 | { | |
3274 | if (alkind_isNewRef (tkind)) | |
3275 | { | |
3276 | /* | |
3277 | ** check that the refs field has been modified | |
3278 | */ | |
3279 | ||
3280 | if (!sRef_isConst (fref)) | |
3281 | { | |
3282 | voptgenerror | |
3283 | (FLG_REFCOUNTTRANS, | |
3284 | message ("Reference counted storage returned without modifying " | |
3285 | "reference count: %s", | |
3286 | exprNode_unparse (fexp)), | |
3287 | loc); | |
3288 | } | |
3289 | } | |
3290 | else if (iseitherassign) | |
3291 | { | |
3292 | if (alkind_isRefCounted (fkind)) | |
3293 | { | |
3294 | if (!sRef_isLocalVar (tref)) | |
3295 | { | |
3296 | vgenhinterror | |
3297 | (FLG_REFCOUNTTRANS, | |
3298 | message | |
3299 | ("Assignment to non-local from reference counted storage: %s", | |
3300 | exprNode_unparse (fexp)), | |
3301 | cstring_makeLiteral | |
3302 | ("Reference counted storage should call a function returning " | |
3303 | "a newref instead of direct assignments."), | |
3304 | loc); | |
3305 | } | |
3306 | else | |
3307 | { | |
3308 | ; | |
3309 | } | |
3310 | } | |
3311 | } | |
3312 | else /* fcnpass */ | |
3313 | { | |
3314 | if (alkind_isRefCounted (tkind) || alkind_isTemp (tkind)) | |
3315 | { | |
3316 | /* okay --- no change in state */ | |
3317 | } | |
3318 | else if (alkind_isKillRef (tkind)) | |
3319 | { | |
3320 | if (!ffix && !tfix && !(transferType == TT_FCNRETURN)) | |
3321 | { | |
3322 | sRef_killComplete (fref, loc); | |
3323 | } | |
3324 | } | |
3325 | else | |
3326 | { | |
3327 | if (!alkind_isError (tkind)) | |
3328 | { | |
3329 | voptgenerror | |
3330 | (FLG_REFCOUNTTRANS, | |
3331 | message ("Reference counted storage %q: %q", | |
3332 | transferErrorMessage (transferType, tkind), | |
3333 | generateText (fexp, texp, tref, transferType)), | |
3334 | loc); | |
3335 | } | |
3336 | } | |
3337 | } | |
3338 | } | |
3339 | else | |
3340 | { | |
3341 | ; | |
3342 | } | |
3343 | ||
3344 | setCodePoint (); | |
3345 | ||
3346 | if (alkind_isOnly (tkind) || alkind_isKeep (tkind)) | |
3347 | { | |
3348 | if (sRef_isAddress (fref)) | |
3349 | { | |
3350 | voptgenerror | |
3351 | (FLG_IMMEDIATETRANS, | |
3352 | message ("Immediate address %q %q: %q", | |
3353 | sRef_unparse (fref), | |
3354 | transferErrorMessage (transferType, tkind), | |
3355 | generateText (fexp, texp, tref, transferType)), | |
3356 | loc); | |
3357 | ||
3358 | sRef_setAliasKind (fref, AK_ERROR, loc); | |
3359 | } | |
3360 | else | |
3361 | { | |
3362 | if ((alkind_isUnknown (fkind) || alkind_isStatic (fkind)) | |
3363 | && !sRef_isDefinitelyNull (fref) | |
3364 | && (!ffix && !tfix) | |
3365 | && (!exprNode_isNullValue (fexp))) | |
3366 | { | |
3367 | flagcode errkind = alkind_isStatic (fkind) | |
3368 | ? FLG_STATICTRANS : FLG_UNKNOWNTRANS; | |
3369 | ||
3370 | if (transferType == TT_GLOBINIT) | |
3371 | { | |
3372 | if (errkind == FLG_STATICTRANS) | |
3373 | { | |
3374 | errkind = FLG_STATICINITTRANS; | |
3375 | } | |
3376 | else | |
3377 | { | |
3378 | errkind = FLG_UNKNOWNINITTRANS; | |
3379 | } | |
3380 | } | |
3381 | ||
3382 | if (optgenerror | |
3383 | (errkind, | |
3384 | message ("%s storage %s %q: %q", | |
3385 | alkind_capName (fkind), | |
3386 | exprNode_unparse (fexp), | |
3387 | transferErrorMessage (transferType, tkind), | |
3388 | generateText (fexp, texp, tref, transferType)), | |
3389 | loc)) | |
3390 | { | |
3391 | sRef_showAliasInfo (fref); | |
3392 | } | |
3393 | } | |
3394 | } | |
3395 | ||
3396 | /* don't kill shared to suppress future messages */ | |
3397 | if (!alkind_isShared (fkind)) | |
3398 | { | |
3399 | if (isassign) | |
3400 | { | |
3401 | if (!ffix) | |
3402 | { | |
3403 | /*< yuk! should do this in aliasaux >*/ | |
3404 | ||
3405 | if (!sRef_isNSLocalVar (tref) && !sRef_sameName (fref, tref)) | |
3406 | { | |
3407 | if (!tfix) | |
3408 | { | |
3409 | sRef_setKeptComplete (fref, loc); | |
3410 | } | |
3411 | else | |
3412 | { | |
3413 | sRef_setKept (fref, loc); | |
3414 | } | |
3415 | } | |
3416 | } | |
3417 | } | |
3418 | else | |
3419 | { | |
3420 | if (!ffix) | |
3421 | { | |
3422 | if (!tfix) | |
3423 | { | |
3424 | if (alkind_isKeep (tkind)) | |
3425 | { | |
3426 | sRef_setKeptComplete (fref, loc); | |
3427 | } | |
3428 | else | |
3429 | { | |
3430 | sRef_killComplete (fref, loc); | |
3431 | } | |
3432 | } | |
3433 | else | |
3434 | { | |
3435 | if (alkind_isKeep (tkind)) | |
3436 | { | |
3437 | sRef_setKept (fref, loc); | |
3438 | } | |
3439 | else | |
3440 | { | |
3441 | sRef_kill (fref, loc); | |
3442 | } | |
3443 | } | |
3444 | } | |
3445 | } | |
3446 | } | |
3447 | } | |
3448 | else if (alkind_isOwned (tkind)) | |
3449 | { | |
3450 | /* don't kill shared to suppress future messages */ | |
3451 | if (!alkind_isShared (fkind)) | |
3452 | { | |
3453 | if (!isassign | |
3454 | || !sRef_sameName (fref, tref)) /* result of return parameter */ | |
3455 | { | |
3456 | if (!ffix) | |
3457 | { | |
3458 | if (!tfix) | |
3459 | { | |
3460 | sRef_setDependentComplete (fref, loc); | |
3461 | } | |
3462 | else | |
3463 | { | |
3464 | sRef_setDependent (fref, loc); | |
3465 | } | |
3466 | } | |
3467 | } | |
3468 | } | |
3469 | } | |
3470 | else if (alkind_isShared (tkind)) | |
3471 | { | |
3472 | if (alkind_isFresh (fkind) || alkind_isLocal (fkind)) | |
3473 | { | |
3474 | if (!ffix) | |
3475 | { | |
3476 | sRef_setShared (fref, loc); | |
3477 | } | |
3478 | } | |
3479 | } | |
3480 | else if (alkind_isUnknown (tkind) && context_getFlag (FLG_MEMIMPLICIT)) | |
3481 | { | |
3482 | if (alkind_isDependent (fkind)) | |
3483 | { | |
3484 | if (!exprNode_isNullValue (fexp) | |
3485 | && ctype_isMutable (exprNode_getType (fexp)) | |
3486 | && (!iseitherassign || sRef_isReference (tref))) | |
3487 | { | |
3488 | if (canLoseReference (fref, loc)) | |
3489 | { | |
3490 | ; | |
3491 | } | |
3492 | else | |
3493 | { | |
3494 | if (optgenerror | |
3495 | (FLG_DEPENDENTTRANS, | |
3496 | message ("%s storage %q%q: %q", | |
3497 | alkind_capName (fkind), | |
3498 | sRef_unparseOpt (fref), | |
3499 | transferErrorMessage (transferType, tkind), | |
3500 | generateText (fexp, texp, tref, transferType)), | |
3501 | loc)) | |
3502 | { | |
3503 | DPRINTF (("Here: %s / %s", sRef_unparseFull (fref), | |
3504 | sRef_unparseFull (tref))); | |
3505 | sRef_showAliasInfo (fref); | |
3506 | } | |
3507 | } | |
3508 | } | |
3509 | } | |
3510 | } | |
3511 | else if (alkind_isNewRef (tkind)) | |
3512 | { | |
3513 | if (!ffix && !tfix) | |
3514 | { | |
3515 | sRef_killComplete (fref, loc); | |
3516 | } | |
3517 | } | |
3518 | else if (alkind_isKillRef (tkind)) | |
3519 | { | |
3520 | if (transferType == TT_FCNRETURN) | |
3521 | { | |
3522 | if (sRef_isNewRef (fref)) | |
3523 | { | |
3524 | if (optgenerror | |
3525 | (FLG_REFCOUNTTRANS, | |
3526 | message ("New reference returned as temp reference: %q", | |
3527 | generateText (fexp, texp, tref, transferType)), | |
3528 | loc)) | |
3529 | { | |
3530 | sRef_showAliasInfo (fref); | |
3531 | } | |
3532 | } | |
3533 | } | |
3534 | else | |
3535 | { | |
3536 | if (sRef_isNewRef (fref)) | |
3537 | { | |
3538 | sRef_killComplete (fref, loc); | |
3539 | } | |
3540 | else | |
3541 | { | |
3542 | if (sRef_isRefCounted (fref) | |
3543 | && sRef_isCvar (fref) | |
3544 | && !sRef_isLocalVar (fref)) | |
3545 | { | |
3546 | if (optgenerror | |
3547 | (FLG_REFCOUNTTRANS, | |
3548 | message | |
3549 | ("External reference counted storage released: %q", | |
3550 | generateText (fexp, texp, tref, transferType)), | |
3551 | loc)) | |
3552 | { | |
3553 | sRef_showAliasInfo (fref); | |
3554 | } | |
3555 | } | |
3556 | } | |
3557 | } | |
3558 | ||
3559 | } | |
3560 | else | |
3561 | { | |
3562 | ; | |
3563 | } | |
3564 | ||
3565 | setCodePoint (); | |
3566 | } | |
3567 | ||
3568 | /* | |
3569 | ** assigns fexp := tref or passes fexp as a parameter, or returns fexp. | |
3570 | ** | |
3571 | ** For assignments, sets alias and definition state accordingly. | |
3572 | */ | |
3573 | ||
3574 | static void | |
3575 | checkTransfer (exprNode fexp, sRef fref, exprNode texp, sRef tref, | |
3576 | fileloc loc, transferKind transferType) | |
3577 | { | |
3578 | setCodePoint (); | |
3579 | ||
3580 | if (context_inProtectVars ()) | |
3581 | { | |
3582 | return; | |
3583 | } | |
3584 | ||
3585 | /* | |
3586 | ** for local references, we need to check | |
3587 | ** the transfer for all possible aliases. | |
3588 | */ | |
3589 | ||
3590 | if (sRef_isLocalVar (tref) && transferType != TT_DOASSIGN) | |
3591 | { | |
3592 | sRefSet alias = usymtab_allAliases (tref); | |
3593 | ||
3594 | sRefSet_realElements (alias, atref) | |
3595 | { | |
3596 | sRef abase = sRef_getRootBase (atref); | |
3597 | ||
3598 | if (sRef_isKnown (atref) | |
3599 | && !sRef_isLocalVar (abase) | |
3600 | && !sRef_isExternal (abase)) | |
3601 | { | |
3602 | atref = sRef_updateSref (atref); | |
3603 | ||
3604 | if (sRef_hasName (atref)) | |
3605 | { | |
3606 | if (!sRef_isNew (atref) | |
3607 | && !sRef_sameName (tref, atref)) | |
3608 | { | |
3609 | context_setAliasAnnote (atref, tref); | |
3610 | } | |
3611 | ||
3612 | checkTransferAux (fexp, fref, TRUE, | |
3613 | texp, atref, FALSE, | |
3614 | loc, transferType); | |
3615 | ||
3616 | context_clearAliasAnnote (); | |
3617 | } | |
3618 | } | |
3619 | } end_sRefSet_realElements; | |
3620 | ||
3621 | sRefSet_free (alias); | |
3622 | } | |
3623 | ||
3624 | ||
3625 | if (sRef_isLocalVar (fref)) | |
3626 | { | |
3627 | sRefSet alias = usymtab_allAliases (fref); | |
3628 | ||
3629 | sRefSet_realElements (alias, afref) | |
3630 | { | |
3631 | sRef abase = sRef_getRootBase (afref); | |
3632 | ||
3633 | if (sRef_isKnown (afref) | |
3634 | && !sRef_isLocalVar (abase) | |
3635 | && !sRef_isExternal (abase)) | |
3636 | { | |
3637 | afref = sRef_updateSref (afref); | |
3638 | ||
3639 | if (sRef_hasName (afref)) | |
3640 | { | |
3641 | if (!sRef_isNew (afref) | |
3642 | && !sRef_sameName (afref, fref)) | |
3643 | { | |
3644 | context_setAliasAnnote (afref, fref); | |
3645 | } | |
3646 | ||
3647 | checkTransferAux (fexp, afref, FALSE, | |
3648 | texp, tref, TRUE, | |
3649 | loc, transferType); | |
3650 | ||
3651 | context_clearAliasAnnote (); | |
3652 | } | |
3653 | } | |
3654 | } end_sRefSet_realElements; | |
3655 | ||
3656 | sRefSet_free (alias); | |
3657 | } | |
3658 | ||
3659 | setCodePoint (); | |
3660 | ||
3661 | checkTransferAux (fexp, fref, FALSE, texp, tref, FALSE, | |
3662 | loc, transferType); | |
3663 | ||
3664 | setCodePoint (); | |
3665 | } | |
3666 | ||
3667 | static /*@exposed@*/ sRef | |
3668 | dependentReference (sRef sr) | |
3669 | { | |
3670 | sRefSet ab = usymtab_aliasedBy (sr); /* yes, really mean aliasedBy */ | |
3671 | ||
3672 | /* | |
3673 | ** If there is a local variable that aliases sr, then there is no | |
3674 | ** error. Make the local an only. | |
3675 | */ | |
3676 | ||
3677 | if (!sRefSet_isEmpty (ab)) | |
3678 | { | |
3679 | sRef res = sRef_undefined; | |
3680 | ||
3681 | /* | |
3682 | ** make one an only, others alias it | |
3683 | */ | |
3684 | ||
3685 | ||
3686 | sRefSet_realElements (ab, current) | |
3687 | { | |
3688 | if (sRef_isOwned (current)) | |
3689 | { | |
3690 | res = current; | |
3691 | break; | |
3692 | } | |
3693 | } end_sRefSet_realElements; | |
3694 | ||
3695 | sRefSet_free (ab); | |
3696 | return res; | |
3697 | } | |
3698 | ||
3699 | return sRef_undefined; | |
3700 | } | |
3701 | ||
3702 | bool canLoseReference (sRef sr, fileloc loc) | |
3703 | { | |
3704 | bool gotone = FALSE; | |
3705 | sRefSet ab = usymtab_aliasedBy (sr); /* yes, really mean aliasedBy */ | |
3706 | ||
3707 | ||
3708 | /* | |
3709 | ** if there is a local variable that aliases sr, then there is no | |
3710 | ** error. Make the local an only. | |
3711 | */ | |
3712 | ||
3713 | if (!sRefSet_isEmpty (ab)) | |
3714 | { | |
3715 | /* | |
3716 | ** make one an only, others alias it | |
3717 | */ | |
3718 | ||
3719 | ||
3720 | sRefSet_realElements (ab, current) | |
3721 | { | |
3722 | sRef_setLastReference (current, sr, loc); | |
3723 | gotone = TRUE; | |
3724 | break; | |
3725 | } end_sRefSet_realElements; | |
3726 | ||
3727 | sRefSet_free (ab); | |
3728 | } | |
3729 | ||
3730 | return gotone; | |
3731 | } | |
3732 | ||
3733 | bool canLoseLocalReference (sRef sr, fileloc loc) | |
3734 | { | |
3735 | bool gotone = FALSE; | |
3736 | sRefSet ab = usymtab_aliasedBy (sr); /* yes, really mean aliasedBy */ | |
3737 | ||
3738 | ||
3739 | /* | |
3740 | ** if there is a local variable that aliases sr, then there is no | |
3741 | ** error. Make the local an only. | |
3742 | */ | |
3743 | ||
3744 | if (!sRefSet_isEmpty (ab)) | |
3745 | { | |
3746 | /* | |
3747 | ** make one an only, others alias it | |
3748 | */ | |
3749 | ||
3750 | ||
3751 | sRefSet_realElements (ab, current) | |
3752 | { | |
3753 | if (sRef_isRealLocalVar (sRef_getRootBase (current))) | |
3754 | { | |
3755 | sRef_setLastReference (current, sr, loc); | |
3756 | gotone = TRUE; | |
3757 | break; | |
3758 | } | |
3759 | } end_sRefSet_realElements; | |
3760 | ||
3761 | sRefSet_free (ab); | |
3762 | } | |
3763 | ||
3764 | return gotone; | |
3765 | } | |
3766 | ||
3767 | ||
1ac6313d | 3768 | /*start modification */ |
3769 | ||
3770 | /*added by David Larochelle 4/13/2000*/ | |
3771 | ||
3772 | /*this is modeled after checkTransferNullAux */ | |
3773 | ||
4cccc6ad | 3774 | static void |
1ac6313d | 3775 | checkTransferNullTerminatedAux (sRef fref, exprNode fexp, |
3776 | /*@unused@*/ bool ffix, | |
3777 | sRef tref, exprNode texp, /*@unused@*/ bool tfix, | |
3778 | fileloc loc, transferKind transferType) | |
3779 | { | |
3780 | alkind tkind = sRef_getAliasKind (tref); | |
3781 | ctype ttyp = ctype_realType (sRef_getType (tref)); | |
3782 | ||
3783 | /* DEBUG | |
3784 | printf ("checking for fexp-%s\n", exprNode_unparse(fexp)); | |
3785 | printf ("checking for texp-%s\n", exprNode_unparse(texp)); | |
3786 | */ | |
3787 | ||
3788 | if (ctype_isUnknown (ttyp)) | |
3789 | { | |
3790 | ttyp = exprNode_getType (texp); | |
3791 | ||
3792 | if (ctype_isUnknown (ttyp)) | |
3793 | { | |
3794 | ttyp = exprNode_getType (fexp); | |
3795 | ||
3796 | if (ctype_isUnknown (ttyp)) | |
3797 | { | |
3798 | ttyp = sRef_getType (fref); | |
3799 | } | |
3800 | } | |
3801 | } | |
3802 | ||
3803 | if (ctype_isFunction (ttyp) && (transferType == TT_FCNRETURN)) | |
3804 | { | |
3805 | ttyp = ctype_returnValue (ttyp); | |
3806 | } | |
3807 | ||
3808 | /* | |
3809 | ** check for null terminated (don't need to check aliases??) | |
3810 | */ | |
3811 | ||
3812 | if (!sRef_isNullTerminated (fref) | |
3813 | && !usymtab_isGuarded (fref) | |
3814 | && ctype_isRealAP (ttyp)) | |
3815 | { | |
3816 | if (!alkind_isLocal (tkind) && !alkind_isFresh (tkind) | |
3817 | //this should be perhapsNullTerminated but I didn't want to write | |
3818 | && (sRef_isPossiblyNullTerminated (tref) || | |
3819 | sRef_isNullTerminated (tref)) | |
3820 | && !(transferType == TT_DOASSIGN)) | |
3821 | { | |
3822 | if (transferType == TT_GLOBINIT) | |
3823 | { | |
3824 | printf("-----------------------------------NULLTERMINATED ERROR1\n"); | |
3825 | if (sRef_isPossiblyNullTerminated (fref)) { | |
3826 | if (lloptgenerror | |
3827 | (FLG_NULLTERMINATEDWARNING, | |
f5ac53de | 3828 | message ("%s %q initialized to %s value: %q", |
1ac6313d | 3829 | sRef_getScopeName (tref), |
3830 | sRef_unparse (tref), | |
3831 | sRef_ntMessage (fref), | |
3832 | generateText (fexp, texp, tref, transferType)), | |
3833 | loc)) | |
3834 | { | |
3835 | ||
3836 | printf ("NULLTERMINATED REFERENCE ERROR\n"); | |
3837 | // printf ("First way\n"); | |
3838 | } | |
3839 | ||
3840 | } else { | |
3841 | ||
3842 | if (lloptgenerror | |
3843 | (FLG_NULLTERMINATED, | |
f5ac53de | 3844 | message ("%s %q initialized to %s value: %q", |
1ac6313d | 3845 | sRef_getScopeName (tref), |
3846 | sRef_unparse (tref), | |
3847 | sRef_ntMessage (fref), | |
3848 | generateText (fexp, texp, tref, transferType)), | |
3849 | loc)) | |
3850 | { | |
3851 | ||
3852 | printf ("NULLTERMINATED REFERENCE ERROR\n"); | |
3853 | // printf ("First way\n"); | |
3854 | } | |
3855 | ||
3856 | printf("-----------------------------\n\n"); | |
3857 | ||
3858 | } | |
3859 | } | |
3860 | else | |
3861 | { | |
3862 | printf("****************************NULLTERMINATED ERROR2\n"); | |
3863 | // ((transferType == TT_FCNPASS) ? FLG_NULLPASS : FLG_NULLRET, | |
3864 | ||
3865 | if (sRef_isPossiblyNullTerminated (fref)) | |
3866 | { | |
4cccc6ad | 3867 | |
1ac6313d | 3868 | if (lloptgenerror |
3869 | (FLG_NULLTERMINATEDWARNING, | |
3870 | message ("%q storage %q%s: %q", | |
4cccc6ad | 3871 | /*@i777@*/cstring_capitalize (sRef_ntMessage (fref)), |
1ac6313d | 3872 | sRef_unparseOpt (fref), |
3873 | transferNTMessage (transferType), | |
3874 | generateText (fexp, texp, tref, transferType)), | |
3875 | loc)) | |
3876 | { | |
3877 | ||
3878 | printf ("NULLTERMINATED REFERENCE ERROR\n"); | |
3879 | // printf ("First way\n"); | |
3880 | } | |
3881 | ||
3882 | } else { | |
3883 | if (lloptgenerror | |
3884 | ((transferType == TT_FCNPASS) ? FLG_NULLTERMINATED: FLG_NULLTERMINATED, | |
3885 | message ("%q storage %q%s: %q", | |
4cccc6ad | 3886 | /*@i77@*/cstring_capitalize (sRef_ntMessage (fref)), |
1ac6313d | 3887 | sRef_unparseOpt (fref), |
3888 | transferNTMessage (transferType), | |
3889 | generateText (fexp, texp, tref, transferType)), | |
3890 | loc)) | |
3891 | { | |
3892 | // sRef_showNullInfo (fref); | |
3893 | // sRef_setNullError (fref); | |
3894 | printf ("SYMBOL REFERENCED IS NOT NULLTERMINATED!\n"); | |
3895 | ||
3896 | } | |
3897 | printf("*******************************=\n\n"); | |
3898 | } | |
3899 | } | |
3900 | } | |
3901 | else | |
3902 | { | |
3903 | ; | |
3904 | } | |
3905 | } | |
3906 | } | |
3907 | /* end modification */ | |
3908 | ||
3909 |