]>
Commit | Line | Data |
---|---|---|
28bf4b0b | 1 | /* |
11db3170 | 2 | ** Splint - annotation-assisted static program checker |
77d37419 | 3 | ** Copyright (C) 1994-2002 University of Virginia, |
28bf4b0b | 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 | ** | |
1b8ae690 | 20 | ** For information on splint: splint@cs.virginia.edu |
21 | ** To report a bug: splint-bug@cs.virginia.edu | |
11db3170 | 22 | ** For more information: http://www.splint.org |
28bf4b0b | 23 | */ |
24 | /* | |
25 | ** transferChecks.c | |
26 | */ | |
27 | ||
1b8ae690 | 28 | # include "splintMacros.nf" |
28bf4b0b | 29 | # include "basic.h" |
30 | # include "transferChecks.h" | |
31 | ||
2e127cb8 | 32 | /* transfer types: */ |
33 | typedef enum | |
34 | { | |
35 | TT_FCNRETURN, | |
36 | TT_DOASSIGN, | |
37 | TT_FIELDASSIGN, | |
38 | TT_FCNPASS, | |
39 | TT_GLOBPASS, | |
40 | TT_GLOBRETURN, | |
41 | TT_PARAMRETURN, | |
42 | TT_LEAVETRANS, | |
43 | TT_GLOBINIT | |
44 | } transferKind; | |
45 | ||
28bf4b0b | 46 | static void checkStructTransfer (exprNode p_lhs, sRef p_slhs, exprNode p_rhs, sRef p_srhs, |
47 | fileloc p_loc, transferKind p_tt); | |
48 | static void checkMetaStateConsistent (/*@exposed@*/ sRef p_fref, sRef p_tref, | |
49 | fileloc p_loc, transferKind p_transferType) ; | |
50 | ||
51 | static void checkLeaveTrans (uentry p_actual, transferKind p_transferType); | |
52 | static void checkTransfer (exprNode p_fexp, /*@dependent@*/ sRef p_fref, | |
53 | exprNode p_texp, /*@dependent@*/ sRef p_tref, | |
0bf5022d | 54 | exprNode p_fcn, /* for printing better error messages */ |
28bf4b0b | 55 | fileloc p_loc, transferKind p_transferType); |
56 | static void checkGlobTrans (uentry p_glob, transferKind p_type); | |
57 | ||
58 | static ynm | |
59 | checkCompletelyDefined (exprNode p_fexp, /*@exposed@*/ sRef p_fref, sRef p_ofref, | |
60 | exprNode p_texp, sRef p_tref, | |
61 | bool p_topLevel, bool p_inUnion, bool p_directUnion, | |
62 | fileloc p_loc, transferKind p_transferType, int p_depth, | |
63 | bool p_report); | |
64 | ||
65 | static /*@exposed@*/ sRef dependentReference (sRef p_sr); | |
66 | static bool canLoseLocalReference (/*@dependent@*/ sRef p_sr, fileloc p_loc) ; | |
67 | ||
68 | /* | |
69 | ** returns the most specific alkind | |
70 | */ | |
71 | ||
72 | alkind alkind_resolve (alkind a1, alkind a2) | |
73 | { | |
74 | if (a1 == AK_UNKNOWN || a1 == AK_ERROR) return a2; | |
75 | if (a2 == AK_UNKNOWN || a2 == AK_ERROR || a2 == AK_LOCAL) return a1; | |
76 | if (a1 == AK_LOCAL) return a2; | |
77 | return a1; | |
78 | } | |
79 | ||
80 | /* | |
81 | ** tref <- fref | |
82 | ** | |
83 | ** transferType: | |
84 | ** FCNRETURN return fref; tref is return type | |
85 | ** GLOBASSIGN tref = fref; | |
86 | ** FCNPASS call (fref) ; tref is the argument type | |
87 | ** | |
88 | */ | |
89 | ||
90 | static /*@only@*/ cstring | |
91 | transferErrorMessage (transferKind transferType, alkind tkind) /*@*/ | |
92 | { | |
93 | switch (transferType) | |
94 | { | |
95 | case TT_FCNRETURN: | |
96 | return (message ("returned as %s", alkind_unparse (tkind))); | |
97 | case TT_DOASSIGN: | |
98 | return (message ("assigned to %s", alkind_unparse (tkind))); | |
99 | case TT_FIELDASSIGN: | |
100 | return (message ("assigned to %s", alkind_unparse (tkind))); | |
101 | case TT_GLOBINIT: | |
102 | return (message ("used as initial value for %s", | |
103 | alkind_unparse (tkind))); | |
104 | case TT_FCNPASS: | |
105 | return (message ("passed as %s param", alkind_unparse (tkind))); | |
106 | BADDEFAULT; | |
107 | } | |
108 | BADEXIT; | |
109 | } | |
110 | ||
111 | static /*@only@*/ cstring | |
0bf5022d | 112 | transferErrorExcerpt (transferKind transferType, exprNode fexp, exprNode texp, exprNode fcn) /*@*/ |
28bf4b0b | 113 | { |
114 | switch (transferType) | |
115 | { | |
116 | case TT_FCNRETURN: | |
117 | return (message ("return %s", exprNode_unparse (fexp))); | |
118 | case TT_FIELDASSIGN: | |
119 | case TT_DOASSIGN: | |
120 | case TT_GLOBINIT: | |
121 | return (message ("%s = %s", exprNode_unparse (texp), exprNode_unparse (fexp))); | |
122 | case TT_FCNPASS: | |
0bf5022d | 123 | if (exprNode_isDefined (fcn)) |
124 | { | |
125 | return message ("%s(..., %s, ...)", | |
126 | exprNode_unparse (fcn), | |
127 | exprNode_unparse (fexp)); | |
128 | } | |
129 | else | |
130 | { | |
131 | return cstring_copy (exprNode_unparse (fexp)); | |
132 | } | |
28bf4b0b | 133 | BADDEFAULT; |
134 | } | |
135 | BADEXIT; | |
136 | } | |
137 | ||
138 | static cstring | |
139 | transferErrorExpMessage (transferKind transferType, exkind tkind) /*@*/ | |
140 | { | |
141 | if (exkind_isUnknown (tkind)) | |
142 | { | |
143 | switch (transferType) | |
144 | { | |
145 | case TT_FCNRETURN: | |
146 | return (cstring_makeLiteral ("returned without qualification")); | |
147 | case TT_FIELDASSIGN: | |
148 | case TT_DOASSIGN: | |
149 | return (cstring_makeLiteral ("assigned to unqualified reference")); | |
150 | case TT_FCNPASS: | |
151 | return (cstring_makeLiteral ("passed without qualification")); | |
152 | case TT_GLOBINIT: | |
153 | return (cstring_makeLiteral ("used as initial value for unqualified storage")); | |
154 | BADDEFAULT; | |
155 | } | |
156 | } | |
157 | else | |
158 | { | |
159 | switch (transferType) | |
160 | { | |
161 | case TT_FCNRETURN: | |
162 | return (message ("returned as %s", exkind_unparse (tkind))); | |
163 | case TT_FIELDASSIGN: | |
164 | case TT_DOASSIGN: | |
165 | return (message ("assigned to %s", exkind_unparse (tkind))); | |
166 | case TT_FCNPASS: | |
167 | return (message ("passed as %s param", exkind_unparse (tkind))); | |
168 | BADDEFAULT; | |
169 | } | |
170 | } | |
171 | ||
172 | BADEXIT; | |
173 | } | |
174 | ||
175 | static /*@observer@*/ cstring | |
176 | transferNullMessage (transferKind transferType) /*@*/ | |
177 | { | |
178 | switch (transferType) | |
179 | { | |
180 | case TT_FCNRETURN: | |
181 | return (cstring_makeLiteralTemp ("returned as non-null")); | |
182 | case TT_DOASSIGN: | |
183 | case TT_FIELDASSIGN: | |
184 | return (cstring_makeLiteralTemp ("assigned to non-null")); | |
185 | case TT_GLOBINIT: | |
186 | return (cstring_makeLiteralTemp ("initialized to non-null")); | |
187 | case TT_FCNPASS: | |
188 | return (cstring_makeLiteralTemp ("passed as non-null param")); | |
189 | BADDEFAULT; | |
190 | } | |
191 | BADEXIT; | |
192 | } | |
193 | ||
194 | static /*@dependent@*/ exprNode atFunction = exprNode_undefined; | |
195 | static int atArgNo = 0; | |
196 | static int atNumArgs = 0; | |
197 | ||
198 | static cstring generateText (exprNode e1, exprNode e2, | |
199 | sRef tref, transferKind tt) | |
200 | /*@*/ | |
201 | { | |
202 | if (tt == TT_DOASSIGN || tt == TT_GLOBINIT) | |
203 | { | |
204 | return (message ("%s = %s", exprNode_unparse (e2), | |
205 | exprNode_unparse (e1))); | |
206 | } | |
207 | else if (tt == TT_FIELDASSIGN) | |
208 | { | |
209 | return (message ("%s = %s (field %q)", | |
210 | exprNode_unparse (e2), | |
211 | exprNode_unparse (e1), | |
212 | sRef_unparse (tref))); | |
213 | } | |
214 | else if (tt == TT_FCNPASS) | |
215 | { | |
216 | return (message ("%s (%s%s%s)", | |
217 | exprNode_unparse (atFunction), | |
218 | (atArgNo == 1 ? cstring_undefined | |
219 | : cstring_makeLiteralTemp ("..., ")), | |
220 | exprNode_unparse (e1), | |
221 | (atArgNo == atNumArgs ? cstring_undefined | |
222 | : cstring_makeLiteralTemp (", ...")))); | |
223 | } | |
224 | else | |
225 | { | |
226 | return (cstring_copy (exprNode_unparse (e1))); | |
227 | } | |
228 | } | |
229 | ||
230 | static /*@observer@*/ cstring | |
231 | transferType_unparse (transferKind transferType) /*@*/ | |
232 | { | |
233 | switch (transferType) | |
234 | { | |
235 | case TT_FCNRETURN: | |
236 | return (cstring_makeLiteralTemp ("Returned")); | |
237 | case TT_DOASSIGN: | |
238 | case TT_FIELDASSIGN: | |
239 | return (cstring_makeLiteralTemp ("Assigned")); | |
240 | case TT_FCNPASS: | |
241 | return (cstring_makeLiteralTemp ("Passed")); | |
242 | case TT_GLOBINIT: | |
243 | return (cstring_makeLiteralTemp ("Initialized")); | |
244 | case TT_GLOBRETURN: | |
245 | return (cstring_makeLiteralTemp ("GLOB RETURN!")); | |
246 | case TT_GLOBPASS: | |
247 | return (cstring_makeLiteralTemp ("GLOB PASS!")); | |
248 | case TT_PARAMRETURN: | |
249 | return (cstring_makeLiteralTemp ("PARAM RETURN!")); | |
250 | case TT_LEAVETRANS: | |
251 | return (cstring_makeLiteralTemp ("LEAVE TRANS!")); | |
252 | BADDEFAULT; | |
253 | } | |
254 | BADEXIT; | |
255 | } | |
256 | ||
257 | static /*@observer@*/ cstring udError (sRef s) | |
258 | { | |
259 | if (sRef_isDead (s)) | |
260 | { | |
261 | return cstring_makeLiteralTemp ("released"); | |
262 | } | |
263 | else if (sRef_isAllocated (s)) | |
264 | { | |
265 | return cstring_makeLiteralTemp ("allocated but not defined"); | |
266 | } | |
267 | else | |
268 | { | |
269 | return cstring_makeLiteralTemp ("undefined"); | |
270 | } | |
271 | } | |
272 | ||
273 | static /*@only@*/ | |
274 | cstring defExpl (sRef s) /*@*/ | |
275 | { | |
276 | sRef rb = sRef_getRootBase (s); | |
277 | ||
278 | if (sRef_sameName (rb, s)) | |
279 | { | |
280 | if (sRef_isAllocated (s)) | |
281 | { | |
282 | return cstring_makeLiteral (" (allocated only)"); | |
283 | } | |
284 | return cstring_undefined; | |
285 | } | |
286 | else | |
287 | { | |
288 | return (message (" (%q is %s)", sRef_unparse (s), udError (s))); | |
289 | } | |
290 | } | |
291 | ||
292 | /* | |
293 | ** | |
294 | ** More than just definition checking --- checks for consistent state also! | |
295 | ** | |
296 | ** Returns TRUE if fref is completely defined. | |
297 | ** if !report, returns TRUE unless error is at the deep level. | |
298 | */ | |
299 | ||
300 | static ynm | |
301 | checkCompletelyDefined (exprNode fexp, /*@exposed@*/ sRef fref, sRef ofref, | |
302 | exprNode texp, sRef tref, | |
303 | bool topLevel, bool inUnion, bool directUnion, | |
304 | fileloc loc, transferKind transferType, | |
305 | int depth, bool report) | |
306 | { | |
307 | ctype ct; | |
308 | alkind fkind = sRef_getAliasKind (fref); | |
309 | alkind tkind = sRef_getAliasKind (tref); | |
3120b462 | 310 | |
28bf4b0b | 311 | DPRINTF (("Check completely defined: %s [%s] / %s [%s]", |
312 | exprNode_unparse (fexp), sRef_unparseFull (fref), | |
313 | exprNode_unparse (texp), sRef_unparseFull (tref))); | |
314 | ||
315 | if (depth > MAXDEPTH) | |
316 | { | |
317 | llquietbug | |
318 | (message | |
319 | ("Check definition limit exceeded, checking %q. " | |
320 | "This either means there is a variable with at least " | |
321 | "%d indirections apparent in the program text, or " | |
11db3170 | 322 | "there is a bug in Splint.", |
28bf4b0b | 323 | sRef_unparse (fref), |
324 | MAXDEPTH)); | |
325 | ||
326 | return YES; | |
327 | } | |
328 | ||
329 | if (!sRef_isKnown (fref)) | |
330 | { | |
331 | return YES; | |
332 | } | |
333 | ||
334 | if (sRef_isDead (fref)) | |
335 | { | |
336 | DPRINTF (("Dead storage to completely defined: %s", sRef_unparseFull (fref))); | |
337 | } | |
338 | ||
339 | if (alkind_isStack (fkind)) | |
340 | { | |
341 | ctype rt = ctype_realType (sRef_getType (tref)); | |
342 | ||
343 | if (ctype_isMutable (rt) && !ctype_isSU (rt)) | |
344 | { | |
345 | if (transferType == TT_PARAMRETURN) | |
346 | { | |
347 | if (optgenerror | |
348 | (FLG_RETSTACK, | |
349 | message | |
350 | ("Stack-allocated storage %qreachable from parameter %q", | |
351 | sRef_unparseOpt (fref), | |
352 | sRef_unparse (ofref)), | |
353 | loc)) | |
354 | { | |
355 | sRef_showAliasInfo (fref); | |
356 | } | |
357 | } | |
358 | else if (transferType == TT_GLOBRETURN) | |
359 | { | |
360 | if (optgenerror | |
361 | (FLG_RETSTACK, | |
362 | message | |
363 | ("Stack-allocated storage %qreachable from global %q", | |
364 | sRef_unparseOpt (fref), | |
365 | sRef_unparse (ofref)), | |
366 | loc)) | |
367 | { | |
368 | sRef_showAliasInfo (fref); | |
369 | } | |
370 | } | |
371 | else if (transferType == TT_FCNRETURN) | |
372 | { | |
373 | if (optgenerror | |
374 | (FLG_RETSTACK, | |
375 | message | |
376 | ("Stack-allocated storage %qreachable from return value: %s", | |
377 | sRef_unparseOpt (fref), | |
378 | exprNode_unparse (fexp)), | |
379 | loc)) | |
380 | { | |
381 | sRef_showAliasInfo (fref); | |
382 | } | |
383 | } | |
384 | else | |
385 | { | |
386 | /* no error */ | |
387 | } | |
388 | } | |
389 | } | |
390 | ||
391 | if (!topLevel) | |
392 | { | |
393 | DPRINTF (("From: %s ==> %s", | |
394 | sRef_unparseFull (fref), | |
395 | sRef_unparseFull (tref))); | |
396 | ||
397 | checkMetaStateConsistent (fref, tref, loc, transferType); | |
398 | ||
399 | if ((sRef_isObserver (fref) && !sRef_isObserver (tref)) | |
400 | || (sRef_isExposed (fref) && !(sRef_isObserver (tref) | |
401 | || sRef_isExposed (tref)))) | |
402 | { | |
403 | flagcode code = (sRef_isObserver (fref) | |
404 | ? FLG_OBSERVERTRANS : FLG_EXPOSETRANS); | |
405 | ||
406 | if (!sRef_isStateLive (fref)) | |
407 | { | |
408 | ; /* no error (will be a definition error) */ | |
409 | } | |
410 | else if (transferType == TT_DOASSIGN | |
411 | || transferType == TT_FIELDASSIGN | |
412 | || transferType == TT_GLOBINIT | |
413 | || transferType == TT_FCNPASS) | |
414 | { | |
415 | ; /* no error */ | |
416 | } | |
417 | else if (transferType == TT_PARAMRETURN) | |
418 | { | |
419 | if (optgenerror | |
420 | (code, | |
421 | message | |
422 | ("%s storage %qreachable from %s parameter", | |
423 | exkind_capName (sRef_getExKind (fref)), | |
424 | sRef_unparseOpt (fref), | |
425 | exkind_unparseError (sRef_getExKind (tref))), | |
426 | loc)) | |
427 | { | |
428 | sRef_showExpInfo (fref); | |
429 | sRef_setExKind (fref, XO_UNKNOWN, loc); | |
430 | } | |
431 | } | |
432 | else if (transferType == TT_LEAVETRANS) | |
433 | { | |
434 | ; | |
435 | } | |
436 | else if (transferType == TT_GLOBINIT) | |
437 | { | |
438 | if (optgenerror | |
439 | (code, | |
440 | message | |
441 | ("%s storage %qreachable from %s initial value", | |
442 | exkind_capName (sRef_getExKind (fref)), | |
443 | sRef_unparseOpt (fref), | |
444 | exkind_unparseError (sRef_getExKind (tref))), | |
445 | loc)) | |
446 | { | |
447 | sRef_showExpInfo (fref); | |
448 | sRef_setExKind (fref, XO_UNKNOWN, loc); | |
449 | } | |
450 | } | |
451 | else if (transferType == TT_GLOBRETURN) | |
452 | { | |
453 | if (optgenerror | |
454 | (code, | |
455 | message | |
456 | ("%s storage %qreachable from %s global", | |
457 | exkind_capName (sRef_getExKind (fref)), | |
458 | sRef_unparseOpt (fref), | |
459 | exkind_unparseError (sRef_getExKind (tref))), | |
460 | loc)) | |
461 | { | |
462 | sRef_showExpInfo (fref); | |
463 | sRef_setExKind (fref, XO_UNKNOWN, loc); | |
464 | } | |
465 | } | |
466 | else if (transferType == TT_FCNRETURN) | |
467 | { | |
468 | if (optgenerror | |
469 | (code, | |
470 | message | |
471 | ("%s storage %qreachable from %s return value", | |
472 | exkind_capName (sRef_getExKind (fref)), | |
473 | sRef_unparseOpt (fref), | |
474 | exkind_unparseError (sRef_getExKind (tref))), | |
475 | loc)) | |
476 | { | |
477 | sRef_showExpInfo (fref); | |
478 | sRef_setExKind (fref, XO_UNKNOWN, loc); | |
479 | } | |
480 | } | |
481 | else | |
482 | { | |
483 | llcontbug (message ("Transfer type: %s", | |
484 | transferType_unparse (transferType))); | |
485 | ||
486 | if (optgenerror | |
487 | (code, | |
488 | message | |
489 | ("%s storage %qreachable from %s return value", | |
490 | exkind_capName (sRef_getExKind (fref)), | |
491 | sRef_unparseOpt (fref), | |
492 | exkind_unparseError (sRef_getExKind (tref))), | |
493 | loc)) | |
494 | { | |
495 | sRef_showExpInfo (fref); | |
496 | sRef_setExKind (fref, XO_UNKNOWN, loc); | |
497 | } | |
498 | } | |
499 | ||
500 | } | |
501 | ||
502 | if (!alkind_compatible (fkind, tkind)) | |
503 | { | |
504 | if (fkind == AK_UNKNOWN && !sRef_isStateLive (fref)) | |
505 | { | |
506 | ; /* no error (will be a definition error) */ | |
507 | } | |
508 | else if (transferType == TT_DOASSIGN) | |
509 | { | |
510 | ; /* no error */ | |
511 | } | |
512 | else if (transferType == TT_FCNPASS) | |
513 | { | |
514 | if (alkind_isKnown (sRef_getAliasKind (tref))) | |
515 | { | |
516 | if (optgenerror | |
517 | (FLG_COMPMEMPASS, | |
518 | message | |
519 | ("Storage %qreachable from passed parameter " | |
520 | "is %s (should be %s): %s", | |
521 | sRef_unparseOpt (fref), | |
522 | alkind_unparse (sRef_getAliasKind (fref)), | |
523 | alkind_unparse (sRef_getAliasKind (tref)), | |
524 | exprNode_unparse (fexp)), | |
525 | loc)) | |
526 | { | |
527 | sRef_showAliasInfo (fref); | |
528 | } | |
529 | } | |
530 | } | |
531 | else if (transferType == TT_PARAMRETURN) | |
532 | { | |
533 | bool noerror = FALSE; | |
534 | ||
535 | if (alkind_isDependent (sRef_getAliasKind (fref))) | |
536 | { | |
537 | if (canLoseLocalReference (fref, loc)) | |
538 | { | |
539 | noerror = TRUE; | |
540 | } | |
541 | } | |
542 | ||
543 | if (!noerror | |
544 | && optgenerror | |
545 | (FLG_COMPMEMPASS, | |
546 | message | |
547 | ("Storage %qreachable from parameter is %s (should be %s)", | |
548 | sRef_unparseOpt (fref), | |
549 | alkind_unparse (sRef_getAliasKind (fref)), | |
550 | alkind_unparse (sRef_getAliasKind (tref))), | |
551 | loc)) | |
552 | { | |
553 | sRef_showAliasInfo (fref); | |
554 | } | |
555 | } | |
556 | else if (transferType == TT_LEAVETRANS) | |
557 | { | |
558 | if (optgenerror | |
559 | (FLG_COMPMEMPASS, | |
560 | message | |
561 | ("Storage %qreachable from temporary reference is %s " | |
562 | "at scope exit (should be %s)", | |
563 | sRef_unparseOpt (fref), | |
564 | alkind_unparse (sRef_getAliasKind (fref)), | |
565 | alkind_unparse (sRef_getAliasKind (tref))), | |
566 | loc)) | |
567 | { | |
568 | sRef_showAliasInfo (fref); | |
569 | } | |
570 | } | |
571 | else if (transferType == TT_GLOBRETURN) | |
572 | { | |
573 | if (optgenerror | |
574 | (FLG_COMPMEMPASS, | |
575 | message | |
576 | ("Storage %qreachable from global is %s (should be %s)", | |
577 | sRef_unparseOpt (fref), | |
578 | alkind_unparse (sRef_getAliasKind (fref)), | |
579 | alkind_unparse (sRef_getAliasKind (tref))), | |
580 | loc)) | |
581 | { | |
582 | sRef_showAliasInfo (fref); | |
583 | } | |
584 | } | |
585 | else if (transferType == TT_FCNRETURN) | |
586 | { | |
587 | if (optgenerror | |
588 | (FLG_COMPMEMPASS, | |
589 | message | |
590 | ("Storage %qreachable from return value is %s (should be %s)", | |
591 | sRef_unparseOpt (fref), | |
592 | alkind_unparse (sRef_getAliasKind (fref)), | |
593 | alkind_unparse (sRef_getAliasKind (tref))), | |
594 | loc)) | |
595 | { | |
596 | sRef_showAliasInfo (fref); | |
597 | } | |
598 | } | |
599 | else if (transferType == TT_GLOBINIT) | |
600 | { | |
601 | if (optgenerror | |
602 | (FLG_COMPMEMPASS, | |
603 | message | |
604 | ("Storage %qreachable from initial value is %s (should be %s)", | |
605 | sRef_unparseOpt (fref), | |
606 | alkind_unparse (sRef_getAliasKind (fref)), | |
607 | alkind_unparse (sRef_getAliasKind (tref))), | |
608 | loc)) | |
609 | { | |
610 | sRef_showAliasInfo (fref); | |
611 | } | |
612 | } | |
613 | else | |
614 | { | |
615 | llcontbug (message ("Transfer type: %s", | |
616 | transferType_unparse (transferType))); | |
617 | ||
618 | if (optgenerror | |
619 | (FLG_COMPMEMPASS, | |
620 | message | |
621 | ("Storage %qreachable from return value is %s (should be %s)", | |
622 | sRef_unparseOpt (fref), | |
623 | alkind_unparse (sRef_getAliasKind (fref)), | |
624 | alkind_unparse (sRef_getAliasKind (tref))), | |
625 | loc)) | |
626 | { | |
627 | sRef_showAliasInfo (fref); | |
628 | } | |
629 | } | |
630 | } | |
631 | ||
632 | if (sRef_isDead (fref)) | |
633 | { | |
634 | if (directUnion) | |
635 | { | |
636 | return NO; | |
637 | } | |
638 | ||
639 | if (transferType == TT_PARAMRETURN) | |
640 | { | |
641 | if (optgenerror | |
642 | (FLG_USERELEASED, | |
643 | message | |
644 | ("Released storage %q reachable from parameter at return point", | |
645 | sRef_unparse (fref)), | |
646 | loc)) | |
647 | { | |
648 | sRef_showStateInfo (fref); | |
649 | return YES; | |
650 | } | |
651 | } | |
652 | else if (transferType == TT_LEAVETRANS) | |
653 | { | |
654 | if (optgenerror | |
655 | (FLG_USERELEASED, | |
656 | message ("Released storage %q reachable from temporary " | |
657 | "reference at scope exit", | |
658 | sRef_unparse (fref)), | |
659 | loc)) | |
660 | { | |
661 | sRef_showStateInfo (fref); | |
662 | return YES; | |
663 | } | |
664 | } | |
665 | else if (transferType == TT_GLOBRETURN) | |
666 | { | |
667 | if (optgenerror | |
668 | (FLG_GLOBSTATE, | |
669 | message ("Released storage %q reachable from global", | |
670 | sRef_unparse (fref)), | |
671 | loc)) | |
672 | { | |
673 | sRef_showStateInfo (fref); | |
674 | return YES; | |
675 | } | |
676 | } | |
677 | else if (transferType == TT_FCNPASS) | |
678 | { | |
679 | if (optgenerror | |
680 | (FLG_USERELEASED, | |
681 | message ("Released storage %q reachable from passed parameter", | |
682 | sRef_unparse (fref)), | |
683 | loc)) | |
684 | { | |
685 | sRef_showStateInfo (fref); | |
686 | return YES; | |
687 | } | |
688 | } | |
689 | else | |
690 | { | |
691 | if (optgenerror | |
692 | (FLG_USERELEASED, | |
693 | message ("Released storage %q reachable from parameter", | |
694 | sRef_unparse (fref)), | |
695 | loc)) | |
696 | { | |
697 | sRef_showStateInfo (fref); | |
698 | return YES; | |
699 | } | |
700 | } | |
701 | } | |
702 | } | |
703 | ||
704 | if (!topLevel | |
705 | && sRef_possiblyNull (fref) | |
706 | && !sRef_perhapsNull (tref) | |
707 | && ctype_isRealPointer (sRef_getType (tref)) | |
708 | && !usymtab_isGuarded (fref)) | |
709 | { | |
710 | if (transferType == TT_FCNRETURN) | |
711 | { | |
712 | if (optgenerror | |
713 | (FLG_NULLRET, | |
714 | message ("%q storage %qderivable from return value: %s", | |
715 | cstring_capitalize (sRef_nullMessage (fref)), | |
716 | sRef_unparseOpt (fref), | |
717 | exprNode_unparse (fexp)), | |
718 | loc)) | |
719 | { | |
720 | sRef_showNullInfo (fref); | |
721 | ||
722 | DPRINTF (("fref: %s", sRef_unparseFull (fref))); | |
723 | DPRINTF (("tref: %s", sRef_unparseFull (tref))); | |
724 | ||
725 | sRef_setNullError (fref); | |
726 | } | |
727 | } | |
728 | else if (transferType == TT_GLOBRETURN || transferType == TT_PARAMRETURN) | |
729 | { | |
730 | if (optgenerror | |
731 | (FLG_NULLSTATE, | |
732 | message | |
733 | ("Function returns with %s storage derivable from %q %q", | |
734 | sRef_nullMessage (fref), | |
735 | cstring_makeLiteral ((transferType == TT_GLOBRETURN) | |
736 | ? "global" : "parameter"), | |
737 | sRef_unparse (fref)), | |
738 | loc)) | |
739 | { | |
740 | sRef_showNullInfo (fref); | |
741 | sRef_setNullError (fref); | |
742 | } | |
743 | } | |
744 | else if (transferType == TT_GLOBPASS) | |
745 | { | |
746 | if (optgenerror | |
747 | (FLG_NULLPASS, | |
748 | message ("Function called with %s storage " | |
749 | "derivable from global %q", | |
750 | sRef_nullMessage (fref), | |
751 | sRef_unparse (fref)), | |
752 | loc)) | |
753 | { | |
754 | sRef_showNullInfo (fref); | |
755 | sRef_setNullError (fref); | |
756 | } | |
757 | } | |
758 | else if (transferType == TT_FCNPASS) | |
759 | { | |
760 | if (optgenerror | |
761 | (FLG_NULLSTATE, | |
762 | message ("%q storage %qderivable from parameter %q", | |
763 | cstring_capitalize (sRef_nullMessage (fref)), | |
764 | sRef_unparseOpt (fref), | |
765 | generateText (fexp, exprNode_undefined, | |
766 | sRef_undefined, TT_FCNPASS)), | |
767 | loc)) | |
768 | { | |
cd7d9b17 | 769 | DPRINTF (("fref: %s", sRef_unparseFull (fref))); |
770 | DPRINTF (("tref: %s", sRef_unparseFull (tref))); | |
28bf4b0b | 771 | sRef_showNullInfo (fref); |
772 | sRef_setNullError (fref); | |
773 | } | |
774 | } | |
775 | else | |
776 | { | |
777 | llassert (transferType == TT_DOASSIGN | |
778 | || transferType == TT_GLOBINIT | |
779 | || transferType == TT_LEAVETRANS); | |
780 | } | |
781 | } | |
782 | ||
783 | if (sRef_isRelDef (tref) | |
784 | || sRef_isPartial (tref) | |
785 | || sRef_isAllocated (tref) | |
786 | || sRef_isStateSpecial (tref)) | |
787 | { | |
788 | /* should check fref is allocated? */ | |
789 | return YES; | |
790 | } | |
791 | ||
792 | ct = ctype_realType (sRef_getType (fref)); | |
793 | ||
3120b462 | 794 | DPRINTF (("Here: %s", ctype_unparse (ct))); |
795 | ||
28bf4b0b | 796 | if (!(sRef_isAnyDefined (fref) |
797 | || sRef_isPdefined (fref) | |
798 | || sRef_isAllocated (fref) | |
799 | || sRef_isStateUnknown (fref))) | |
800 | { | |
801 | if (transferType == TT_GLOBRETURN) | |
802 | { | |
803 | if (report | |
804 | && optgenerror | |
805 | (FLG_COMPDEF, | |
806 | message ("Function returns with global %q not " | |
807 | "completely defined%q", | |
808 | sRef_unparse (sRef_getRootBase (fref)), | |
809 | defExpl (fref)), | |
810 | loc)) | |
811 | { | |
812 | sRef_showStateInfo (fref); | |
813 | sRef_setDefined (fref, loc); | |
814 | } | |
815 | } | |
816 | else if (transferType == TT_GLOBPASS) | |
817 | { | |
818 | if (report && | |
819 | optgenerror | |
820 | (FLG_COMPDEF, | |
821 | message | |
822 | ("Function called with global %q not completely defined%q", | |
823 | sRef_unparse (sRef_getRootBase (fref)), | |
824 | defExpl (fref)), | |
825 | loc)) | |
826 | { | |
827 | sRef_showStateInfo (fref); | |
828 | sRef_setDefined (fref, loc); | |
829 | } | |
830 | } | |
831 | else if (transferType == TT_PARAMRETURN) | |
832 | { | |
833 | if (report && !topLevel | |
834 | && optgenerror | |
835 | (FLG_COMPDEF, | |
836 | message ("Function returns storage %q reachable from parameter not " | |
837 | "completely defined%q", | |
838 | sRef_unparse (ofref), | |
839 | defExpl (fref)), | |
840 | loc)) | |
841 | { | |
842 | sRef_showStateInfo (fref); | |
843 | sRef_setDefined (fref, loc); | |
844 | } | |
845 | } | |
846 | else if (transferType == TT_LEAVETRANS) | |
847 | { | |
848 | if (report && !topLevel | |
849 | && optgenerror | |
850 | (FLG_COMPDEF, | |
851 | message ("Scope exits with storage %q reachable from " | |
852 | "temporary reference not completely defined%q", | |
853 | sRef_unparse (ofref), | |
854 | defExpl (fref)), | |
855 | loc)) | |
856 | { | |
857 | sRef_showStateInfo (fref); | |
858 | sRef_setDefined (fref, loc); | |
859 | } | |
860 | } | |
861 | else | |
862 | { | |
863 | if (transferType != TT_DOASSIGN | |
864 | && (!(sRef_isNew (fref) || sRef_isType (fref)))) | |
865 | { | |
866 | if (report) | |
867 | { | |
868 | DPRINTF (("Here we are: %s", sRef_unparseFull (fref))); | |
869 | ||
870 | if (sRef_isDead (fref)) | |
871 | { | |
872 | if (optgenerror | |
873 | (FLG_USERELEASED, | |
874 | message ("%s storage %qwas released: %q", | |
875 | transferType_unparse (transferType), | |
876 | sRef_unparseOpt (fref), | |
877 | generateText (fexp, texp, tref, transferType)), | |
878 | loc)) | |
879 | { | |
880 | sRef_showStateInfo (fref); | |
881 | } | |
882 | } | |
883 | else | |
884 | { | |
885 | if (optgenerror | |
886 | (FLG_COMPDEF, | |
887 | message | |
888 | ("%s storage %qnot completely defined%q: %q", | |
889 | transferType_unparse (transferType), | |
890 | sRef_unparseOpt (ofref), | |
891 | defExpl (fref), | |
892 | generateText (fexp, texp, tref, transferType)), | |
893 | loc)) | |
894 | { | |
895 | sRef rb = sRef_getRootBase (fref); | |
896 | sRef_showStateInfo (fref); | |
2e127cb8 | 897 | |
898 | sRef_setDefinedCompleteDirect (rb, loc); | |
28bf4b0b | 899 | } |
900 | } | |
901 | } | |
902 | } | |
903 | else | |
904 | { | |
905 | ||
906 | if (sRef_isAllocated (fref) && sRef_isValid (tref) | |
907 | && (transferType == TT_DOASSIGN)) | |
908 | { | |
909 | sRef_setAllocatedComplete (tref, loc); | |
910 | } | |
911 | return YES; | |
912 | } | |
913 | } | |
914 | ||
915 | return NO; | |
916 | } | |
917 | ||
918 | if (ctype_isUnknown (ct)) | |
919 | { | |
920 | return YES; | |
921 | } | |
3120b462 | 922 | else if (ctype_isPointer (ct) || ctype_isArray (ct)) /* evans 2001-07-12 added ctype_isArray */ |
28bf4b0b | 923 | { |
924 | ctype tct = ctype_realType (sRef_getType (tref)); | |
925 | ||
926 | if (sRef_isStateUnknown (fref)) | |
927 | { | |
928 | return NO; | |
929 | } | |
930 | else | |
931 | { | |
3120b462 | 932 | DPRINTF (("Here fref: %s", sRef_unparseFull (fref))); |
cd7d9b17 | 933 | DPRINTF (("Here tref: %s", sRef_unparseFull (tref))); |
3120b462 | 934 | |
28bf4b0b | 935 | if (ctype_isAP (tct) || ctype_isUnknown (tct)) |
936 | { | |
937 | sRef fptr = sRef_constructDeref (fref); | |
938 | sRef tptr = sRef_constructDeref (tref); | |
939 | ||
cd7d9b17 | 940 | DPRINTF (("Here tptr: %s", sRef_unparseFull (tptr))); |
941 | ||
28bf4b0b | 942 | return (checkCompletelyDefined (fexp, fptr, ofref, |
943 | texp, tptr, | |
944 | FALSE, inUnion, FALSE, loc, | |
945 | transferType, depth + 1, report)); | |
946 | } | |
947 | else | |
948 | { | |
949 | return YES; | |
950 | } | |
951 | } | |
952 | } | |
28bf4b0b | 953 | else if (ctype_isStruct (ct)) |
954 | { | |
955 | ctype tct = ctype_realType (sRef_getType (tref)); | |
956 | ||
957 | DPRINTF (("Struct defined: %s", ctype_unparse (tct))); | |
958 | ||
959 | if (ctype_match (ct, tct)) | |
960 | { | |
961 | bool isOk = TRUE; | |
962 | bool hasOneDefined = FALSE; | |
963 | cstringSList badFields = cstringSList_undefined; | |
964 | ||
965 | if (sRef_isStateUnknown (fref) || sRef_isAllocated (tref)) | |
966 | { | |
967 | return YES; | |
968 | } | |
969 | ||
970 | DPRINTF (("Check field: %s", sRef_unparseFull (fref))); | |
971 | ||
972 | if (sRef_isPdefined (fref) || sRef_isAnyDefined (fref)) | |
973 | { | |
974 | DPRINTF (("Is defined: %s", sRef_unparse (fref))); | |
975 | ||
976 | sRefSet_realElements (sRef_derivedFields (fref), sr) | |
977 | { | |
978 | bool thisField; | |
979 | ||
980 | hasOneDefined = TRUE; | |
981 | ||
982 | DPRINTF (("Check derived: %s", sRef_unparseFull (sr))); | |
983 | ||
984 | if (sRef_isField (sr)) | |
985 | { | |
986 | cstring fieldname = sRef_getField (sr); | |
987 | sRef fldref = sRef_makeField (tref, fieldname); | |
988 | bool shouldCheck = !sRef_isRecursiveField (fldref); | |
989 | ||
990 | if (shouldCheck) | |
991 | { | |
992 | thisField = | |
993 | ynm_toBoolRelaxed | |
994 | (checkCompletelyDefined (fexp, sr, ofref, | |
995 | texp, fldref, | |
996 | FALSE, inUnion, FALSE, loc, | |
997 | transferType, depth + 1, | |
998 | FALSE)); | |
999 | } | |
1000 | else | |
1001 | { | |
1002 | thisField = TRUE; | |
1003 | } | |
1004 | ||
1005 | if (!thisField) | |
1006 | { | |
1007 | isOk = FALSE; | |
1008 | badFields = cstringSList_add (badFields, | |
1009 | sRef_getField (sr)); | |
1010 | } | |
1011 | } | |
1012 | } end_sRefSet_realElements; | |
1013 | } | |
1014 | else if (sRef_isAllocated (fref)) | |
1015 | { | |
1016 | /* | |
1017 | ** for structures, each field must be completely defined | |
1018 | */ | |
1019 | ||
1020 | uentryList fields = ctype_getFields (ct); | |
1021 | ||
1022 | uentryList_elements (fields, ue) | |
1023 | { | |
1024 | bool thisField; | |
1025 | cstring name = uentry_getRealName (ue); | |
1026 | sRef ffield = sRef_makeField (fref, name); | |
1027 | sRef tfield = sRef_makeField (tref, name); | |
1028 | bool shouldCheck = !sRef_isRecursiveField (tfield); | |
1029 | ||
1030 | if (!shouldCheck) | |
1031 | { | |
1032 | thisField = TRUE; | |
1033 | } | |
1034 | else | |
1035 | { | |
1036 | thisField = ynm_toBoolRelaxed | |
1037 | (checkCompletelyDefined (fexp, ffield, ofref, | |
1038 | texp, tfield, | |
1039 | FALSE, inUnion, FALSE, | |
1040 | loc, transferType, | |
1041 | depth + 1, FALSE)); | |
1042 | } | |
1043 | ||
1044 | if (!thisField) | |
1045 | { | |
1046 | isOk = FALSE; | |
1047 | badFields = cstringSList_add (badFields, uentry_rawName (ue)); | |
1048 | } | |
1049 | else | |
1050 | { | |
1051 | hasOneDefined = TRUE; | |
1052 | } | |
1053 | } end_uentryList_elements; | |
1054 | } | |
1055 | else | |
1056 | { | |
1057 | DPRINTF (("Not checking: %s", sRef_unparseFull (fref))); | |
1058 | } | |
1059 | ||
1060 | if (!isOk && (!inUnion || hasOneDefined)) | |
1061 | { | |
1062 | if (transferType == TT_GLOBRETURN) | |
1063 | { | |
1064 | if (optgenerror | |
1065 | (FLG_COMPDEF, | |
1066 | message ("Global storage %q contains %d undefined field%& " | |
1067 | "when call returns: %q", | |
1068 | sRef_unparse (fref), | |
1069 | cstringSList_size (badFields), | |
1070 | cstringSList_unparseAbbrev (badFields)), | |
1071 | loc)) | |
1072 | { | |
1073 | sRef_setDefined (fref, loc); | |
1074 | } | |
1075 | } | |
1076 | else if (transferType == TT_GLOBPASS) | |
1077 | { | |
1078 | if (optgenerror | |
1079 | (FLG_COMPDEF, | |
1080 | message ("Global storage %q contains %d undefined field%& " | |
1081 | "before call: %q", | |
1082 | sRef_unparse (fref), | |
1083 | cstringSList_size (badFields), | |
1084 | cstringSList_unparseAbbrev (badFields)), | |
1085 | loc)) | |
1086 | { | |
1087 | sRef_setDefined (fref, loc); | |
1088 | } | |
1089 | } | |
1090 | else if (transferType == TT_PARAMRETURN) | |
1091 | { | |
1092 | if (optgenerror | |
1093 | (FLG_COMPDEF, | |
1094 | message ("Storage %qreachable from parameter " | |
1095 | "contains %d undefined field%&: %q", | |
1096 | sRef_unparseOpt (fref), | |
1097 | cstringSList_size (badFields), | |
1098 | cstringSList_unparseAbbrev (badFields)), | |
1099 | loc)) | |
1100 | { | |
1101 | sRef_setDefined (fref, loc); | |
1102 | } | |
1103 | } | |
1104 | else if (transferType == TT_LEAVETRANS) | |
1105 | { | |
1106 | /* no error */ | |
1107 | } | |
1108 | else | |
1109 | { | |
1110 | if (optgenerror | |
1111 | (FLG_COMPDEF, | |
1112 | message ("%s storage %qcontains %d undefined field%&: %q", | |
1113 | transferType_unparse (transferType), | |
1114 | sRef_unparseOpt (fref), | |
1115 | cstringSList_size (badFields), | |
1116 | cstringSList_unparseAbbrev (badFields)), | |
1117 | loc)) | |
1118 | { | |
1119 | sRef_setDefined (fref, loc); | |
1120 | } | |
1121 | } | |
1122 | } | |
1123 | ||
1124 | cstringSList_free (badFields); | |
1125 | ||
1126 | if (inUnion) | |
1127 | { | |
1128 | if (directUnion) | |
1129 | { | |
1130 | return (ynm_fromBool (hasOneDefined)); | |
1131 | } | |
1132 | else | |
1133 | { | |
1134 | return (MAYBE); | |
1135 | } | |
1136 | } | |
1137 | else | |
1138 | { | |
1139 | return (ynm_fromBool (!report || isOk)); | |
1140 | } | |
1141 | } | |
1142 | else | |
1143 | { | |
1144 | return YES; | |
1145 | } | |
1146 | } | |
1147 | else if (ctype_isUnion (ct)) | |
1148 | { | |
1149 | if (sRef_isStateUnknown (fref) || sRef_isAllocated (tref)) | |
1150 | { | |
1151 | return YES; | |
1152 | } | |
1153 | else | |
1154 | { | |
1155 | ctype tct = ctype_realType (sRef_getType (tref)); | |
1156 | ||
1157 | if (ctype_isKnown (tct) && ctype_match (ct, tct)) | |
1158 | { | |
1159 | cstringSList goodFields = cstringSList_new (); | |
1160 | bool isOk = FALSE; | |
1161 | int nelements = sRefSet_size (sRef_derivedFields (fref)); | |
1162 | ||
1163 | /* | |
1164 | ** for unions, at least one field must be completely defined | |
1165 | */ | |
1166 | ||
1167 | if (sRef_isPdefined (fref) || sRef_isAnyDefined (fref)) | |
1168 | { | |
1169 | isOk = TRUE; | |
1170 | } | |
1171 | ||
1172 | sRefSet_realElements (sRef_derivedFields (fref), sr) | |
1173 | { | |
1174 | bool thisField; | |
1175 | ||
1176 | if (sRef_isField (sr)) | |
1177 | { | |
1178 | sRef fldref = sRef_makeField (tref, sRef_getField (sr)); | |
1179 | ||
1180 | DPRINTF (("Trying union field: %s", sRef_unparseFull (fldref))); | |
1181 | ||
1182 | thisField = ynm_toBoolStrict | |
1183 | (checkCompletelyDefined | |
1184 | (fexp, sr, ofref, | |
1185 | texp, fldref, FALSE, inUnion, | |
1186 | (nelements > 1 ? TRUE : FALSE), | |
1187 | loc, transferType, depth + 1, FALSE)); | |
1188 | ||
1189 | if (thisField) | |
1190 | { | |
1191 | goodFields = cstringSList_add | |
1192 | (goodFields, sRef_getField (sr)); | |
1193 | } | |
1194 | } | |
1195 | } end_sRefSet_realElements; | |
1196 | ||
1197 | if (cstringSList_empty (goodFields) | |
1198 | && !isOk | |
1199 | && context_getFlag (FLG_UNIONDEF)) | |
1200 | { | |
1201 | if (!inUnion) | |
1202 | { | |
1203 | if (transferType == TT_PARAMRETURN) | |
1204 | { | |
1205 | voptgenerror | |
1206 | (FLG_UNIONDEF, | |
1207 | message ("Union %q reachable from parameter has " | |
1208 | "no defined field", | |
1209 | sRef_unparse (fref)), | |
1210 | loc); | |
1211 | } | |
1212 | else if (transferType == TT_LEAVETRANS) | |
1213 | { | |
1214 | voptgenerror | |
1215 | (FLG_UNIONDEF, | |
1216 | message ("Union %q has no defined field at scope exit", | |
1217 | sRef_unparse (fref)), | |
1218 | loc); | |
1219 | } | |
b7e84605 | 1220 | /* evans 2001-08-21: added this branch for global returns */ |
1221 | else if (transferType == TT_GLOBRETURN) | |
1222 | { | |
1223 | voptgenerror | |
1224 | (FLG_UNIONDEF, | |
1225 | message ("Union %q reachable from global %q has " | |
1226 | "no defined field", | |
1227 | sRef_unparse (fref), | |
1228 | sRef_unparse (sRef_getRootBase (fref))), | |
1229 | loc); | |
1230 | } | |
28bf4b0b | 1231 | else if (transferType == TT_DOASSIGN |
1232 | || transferType == TT_FIELDASSIGN | |
1233 | || transferType == TT_GLOBINIT) | |
1234 | { | |
1235 | ; /* no error */ | |
1236 | } | |
1237 | else | |
1238 | { | |
1239 | voptgenerror | |
1240 | (FLG_UNIONDEF, | |
1241 | message ("%s union %q has no defined field", | |
1242 | transferType_unparse (transferType), | |
1243 | sRef_unparse (fref)), | |
1244 | loc); | |
1245 | } | |
1246 | } | |
1247 | isOk = FALSE; | |
1248 | } | |
1249 | ||
1250 | cstringSList_free (goodFields); | |
1251 | return ynm_fromBool (!report || isOk); | |
1252 | } | |
1253 | } | |
1254 | } | |
1255 | else | |
1256 | { | |
1257 | ; | |
1258 | } | |
1259 | ||
1260 | return YES; | |
1261 | } | |
1262 | ||
1263 | /* | |
1264 | ** fref is being free'd | |
1265 | */ | |
1266 | ||
1267 | typedef enum { | |
1268 | DSC_GLOB, DSC_LOCAL, DSC_PARAM, DSC_STRUCT | |
1269 | } dscCode; | |
1270 | ||
1271 | static /*@observer@*/ cstring dscCode_unparse (dscCode desc) /*@*/ | |
1272 | { | |
1273 | switch (desc) | |
1274 | { | |
1275 | case DSC_GLOB: | |
1276 | return cstring_makeLiteralTemp ("killed global"); | |
1277 | case DSC_LOCAL: | |
1278 | return cstring_makeLiteralTemp ("variable declared in this scope"); | |
1279 | case DSC_PARAM: | |
1280 | return cstring_makeLiteralTemp ("released storage"); | |
1281 | case DSC_STRUCT: | |
1282 | return cstring_makeLiteralTemp ("released structure parameter"); | |
1283 | } | |
1284 | ||
1285 | BADEXIT; | |
1286 | } | |
1287 | ||
1288 | static bool | |
27c9e640 | 1289 | checkCompletelyDestroyed (exprNode p_fexp, sRef p_fref, bool p_topLevel, bool p_isField, |
1290 | fileloc p_loc, int p_depth, dscCode p_desc, | |
1291 | bool p_hideErrors); | |
28bf4b0b | 1292 | |
2e127cb8 | 1293 | bool transferChecks_globalDestroyed (sRef fref, fileloc loc) |
28bf4b0b | 1294 | { |
2e127cb8 | 1295 | DPRINTF (("Global destroyed: %s", sRef_unparseFull (fref))); |
27c9e640 | 1296 | return (checkCompletelyDestroyed (exprNode_undefined, fref, TRUE, FALSE, |
28bf4b0b | 1297 | loc, 0, DSC_GLOB, FALSE)); |
1298 | } | |
1299 | ||
2e127cb8 | 1300 | void transferChecks_localDestroyed (sRef fref, fileloc loc) |
28bf4b0b | 1301 | { |
1302 | if (sRef_isObserver (fref) || sRef_isExposed (fref) | |
1303 | || sRef_isPartial (fref)) | |
1304 | { | |
1305 | ; | |
1306 | } | |
1307 | else | |
1308 | { | |
27c9e640 | 1309 | (void) checkCompletelyDestroyed (exprNode_undefined, fref, TRUE, FALSE, |
28bf4b0b | 1310 | loc, 0, DSC_LOCAL, FALSE); |
1311 | } | |
1312 | } | |
1313 | ||
2e127cb8 | 1314 | void transferChecks_structDestroyed (sRef fref, fileloc loc) |
28bf4b0b | 1315 | { |
1316 | DPRINTF (("Check struct destroyed: %s", sRef_unparse (fref))); | |
1317 | ||
1318 | if (sRef_isObserver (fref) || sRef_isExposed (fref) | |
1319 | || sRef_isPartial (fref)) | |
1320 | { | |
1321 | DPRINTF (("Its exposed!"));; | |
1322 | } | |
1323 | else | |
1324 | { | |
27c9e640 | 1325 | (void) checkCompletelyDestroyed (exprNode_undefined, fref, TRUE, FALSE, |
28bf4b0b | 1326 | loc, 0, DSC_STRUCT, FALSE); |
1327 | } | |
1328 | } | |
1329 | ||
1330 | static bool | |
27c9e640 | 1331 | checkCompletelyDestroyed (exprNode fexp, sRef fref, bool topLevel, bool isField, |
1332 | fileloc loc, int depth, | |
1333 | dscCode desc, bool hideErrors) | |
28bf4b0b | 1334 | { |
1335 | ctype ct; | |
27c9e640 | 1336 | |
1337 | DPRINTF (("Check completely destroyed: %s / %s", | |
1338 | sRef_unparse (fref), | |
1339 | bool_unparse (hideErrors))); | |
28bf4b0b | 1340 | |
1341 | if (depth > MAXDEPTH) | |
1342 | { | |
1343 | llquietbug (message ("checkCompletelyDestroyed: too deep: %s / %q", | |
1344 | exprNode_unparse (fexp), | |
1345 | sRef_unparseFull (fref))); | |
1346 | return TRUE; | |
1347 | } | |
1348 | ||
1349 | if (!sRef_isKnown (fref)) return TRUE; | |
1350 | ||
1351 | /* evans 2001-03-24: added this. Definitely null values are always destroyed. */ | |
1352 | ||
1353 | if (sRef_isDefinitelyNull (fref)) | |
1354 | { | |
1355 | return TRUE; | |
1356 | } | |
1357 | ||
1358 | if (sRef_isDependent (fref) || sRef_isShared (fref) || sRef_isKept (fref)) | |
1359 | { | |
1360 | return TRUE; | |
1361 | } | |
1362 | ||
1363 | { | |
1364 | /* | |
1365 | ** evans 2001-03-24: if there is a dependent reference to this storage, | |
1366 | ** no need to destroy, but make it responsible. | |
1367 | */ | |
1368 | ||
1369 | sRef depRef = dependentReference (fref); | |
1370 | ||
1371 | DPRINTF (("Destroyed? %s / %s", | |
1372 | sRef_unparseFull (fref), | |
1373 | sRef_unparseFull (depRef))); | |
1374 | ||
1375 | DPRINTF (("Aliases: %s", usymtab_unparseAliases ())); | |
1376 | ||
1377 | if (sRef_isValid (depRef)) | |
1378 | { | |
1379 | /* | |
1380 | ** If the referenced storage was not dependent, we make | |
1381 | ** the reference the owner since it must eventually be | |
1382 | ** destroyed. | |
1383 | */ | |
1384 | ||
1385 | if (!sRef_isDependent (depRef)) | |
1386 | { | |
1387 | sRef_setOnly (depRef, loc); /* could be owned? */ | |
1388 | } | |
1389 | ||
1390 | sRef_kill (fref, loc); | |
1391 | return TRUE; | |
1392 | } | |
1393 | } | |
1394 | ||
2e127cb8 | 1395 | ct = ctype_realType (sRef_getType (fref)); |
1396 | ||
1397 | if (sRef_isPdefined (fref) | |
1398 | && ctype_isAP (ct) | |
27c9e640 | 1399 | && !isField |
1400 | && !context_getFlag (FLG_STRICTDESTROY)) | |
28bf4b0b | 1401 | { |
2e127cb8 | 1402 | /* |
1403 | ** Don't report errors for array elements (unless strictdestroy) | |
1404 | ** when at least one appears to have been destroyed. | |
1405 | */ | |
1406 | ||
27c9e640 | 1407 | DPRINTF (("Partial: %s / hiding errors: %s", sRef_unparseFull (fref), |
1408 | ctype_unparse (ct))); | |
2e127cb8 | 1409 | hideErrors = TRUE; |
1410 | /* Don't report any more errors, but still change ownership. */ | |
28bf4b0b | 1411 | } |
2e127cb8 | 1412 | |
28bf4b0b | 1413 | if (usymtab_isDefinitelyNull (fref)) |
1414 | { | |
1415 | DPRINTF (("Probably null!")); | |
1416 | return TRUE; | |
1417 | } | |
1418 | ||
2e127cb8 | 1419 | /* |
1420 | ** evans 2002-01-02: removed this | |
1421 | ** if (!context_flagOn (FLG_COMPDESTROY, loc)) | |
1422 | ** { | |
1423 | ** return TRUE; | |
1424 | ** } | |
1425 | ** | |
1426 | ** if (!context_getFlag (FLG_MUSTFREEONLY)) return TRUE; | |
1427 | */ | |
28bf4b0b | 1428 | |
28bf4b0b | 1429 | DPRINTF (("Here: %s", ctype_unparse (ct))); |
1430 | ||
1431 | if (!topLevel) | |
1432 | { | |
1433 | bool docheck = FALSE; | |
1434 | bool reportederror; | |
1435 | ||
1436 | if (sRef_isFresh (fref) || sRef_isOnly (fref)) | |
1437 | { | |
1438 | docheck = TRUE; | |
1439 | ||
1440 | DPRINTF (("Here: %s", ctype_unparse (ct))); | |
1441 | if (sRef_isDead (fref) | |
1442 | || sRef_isUnuseable (fref) | |
1443 | || sRef_definitelyNull (fref) | |
1444 | || sRef_isObserver (fref) | |
1445 | || sRef_isExposed (fref)) | |
1446 | { | |
1447 | docheck = FALSE; | |
1448 | } | |
1449 | } | |
1450 | ||
1451 | if (docheck) | |
1452 | { | |
1453 | if (sRef_isPossiblyDead (fref) || sRef_isRelDef (fref)) | |
1454 | { | |
1455 | if (exprNode_isDefined (fexp)) | |
1456 | { | |
1457 | reportederror = | |
1458 | !hideErrors | |
1459 | && | |
1460 | optgenerror2 | |
1461 | (FLG_COMPDESTROY, FLG_STRICTDESTROY, | |
1462 | message ("Only storage %q (type %s) derived from %s " | |
1463 | "may not have been released: %s", | |
1464 | sRef_unparse (fref), | |
1465 | ctype_unparse (sRef_getType (fref)), | |
1466 | dscCode_unparse (desc), | |
1467 | exprNode_unparse (fexp)), | |
1468 | loc); | |
1469 | } | |
1470 | else | |
1471 | { | |
1472 | reportederror = | |
1473 | !hideErrors | |
1474 | && | |
1475 | optgenerror2 | |
1476 | (FLG_COMPDESTROY, FLG_STRICTDESTROY, | |
1477 | message | |
1478 | ("Only storage %q (type %s) derived from %s " | |
1479 | "may not have been released", | |
1480 | sRef_unparse (fref), | |
1481 | ctype_unparse (sRef_getType (fref)), | |
1482 | dscCode_unparse (desc)), | |
1483 | loc); | |
1484 | } | |
1485 | ||
1486 | if (reportederror) | |
1487 | { | |
1488 | sRef_kill (fref, loc); /* prevent further errors */ | |
1489 | } | |
1490 | } | |
1491 | else | |
1492 | { | |
1493 | if (sRef_isStateUndefined (fref)) | |
1494 | { | |
1495 | DPRINTF (("Here: %s", ctype_unparse (ct))); | |
1496 | return TRUE; | |
1497 | } | |
1498 | else | |
1499 | { | |
1500 | if (exprNode_isDefined (fexp)) | |
1501 | { | |
1502 | DPRINTF (("Here: %s", sRef_unparseFull (fref))); | |
1503 | ||
1504 | reportederror = | |
1505 | !hideErrors | |
1506 | && | |
1507 | optgenerror | |
1508 | (FLG_COMPDESTROY, | |
1509 | message ("Only storage %q (type %s) derived from %s " | |
1510 | "is not released (memory leak): %s", | |
1511 | sRef_unparse (fref), | |
1512 | ctype_unparse (sRef_getType (fref)), | |
1513 | dscCode_unparse (desc), | |
1514 | exprNode_unparse (fexp)), | |
1515 | loc); | |
1516 | } | |
1517 | else | |
1518 | { | |
1519 | reportederror = | |
1520 | !hideErrors | |
1521 | && | |
1522 | optgenerror | |
1523 | (FLG_COMPDESTROY, | |
1524 | message ("Only storage %q (type %s) derived from %s " | |
1525 | "is not released (memory leak)", | |
1526 | sRef_unparse (fref), | |
1527 | ctype_unparse (sRef_getType (fref)), | |
1528 | dscCode_unparse (desc)), | |
1529 | loc); | |
1530 | } | |
1531 | ||
1532 | if (reportederror) | |
1533 | { | |
1534 | hideErrors = TRUE; | |
1535 | ||
1536 | /* sRef_kill (fref, loc); */ /* prevent further errors */ | |
1537 | DPRINTF (("Killed: %s", sRef_unparseFull (fref))); | |
1538 | } | |
1539 | } | |
1540 | } | |
1541 | ||
1542 | DPRINTF (("Here: %s", ctype_unparse (ct))); | |
1543 | return FALSE; | |
1544 | } | |
1545 | ||
77d37419 | 1546 | if (/*! evs-2002-03-24 sRef_isAnyDefined (fref) || */ |
28bf4b0b | 1547 | sRef_isDead (fref) |
1548 | || (sRef_isPdefined (fref) | |
1549 | && sRefSet_isEmpty (sRef_derivedFields (fref)))) | |
1550 | { | |
1551 | DPRINTF (("Here: %s [%s / %s]", | |
1552 | sRef_unparseFull (fref), | |
1553 | bool_unparse (sRef_isAnyDefined (fref)), | |
1554 | bool_unparse (sRef_isDead (fref)))); | |
1555 | return TRUE; | |
1556 | } | |
1557 | } | |
1558 | ||
1559 | DPRINTF (("Here...")); | |
1560 | ||
1561 | if (ctype_isPointer (ct)) | |
1562 | { | |
1563 | sRef fptr = sRef_constructDeadDeref (fref); | |
1564 | bool res; | |
1565 | ||
27c9e640 | 1566 | res = checkCompletelyDestroyed (fexp, fptr, FALSE, FALSE, |
1567 | loc, depth + 1, desc, hideErrors); | |
28bf4b0b | 1568 | |
1569 | return res; | |
1570 | } | |
1571 | else if (ctype_isArray (ct)) | |
1572 | { | |
1573 | if ((sRef_isStateUnknown (fref) || sRef_isAllocated (fref)) | |
1574 | && !sRef_hasDerived (fref)) | |
1575 | { | |
1576 | /* | |
1577 | ** Bogosity necessary to prevent infinite depth. | |
1578 | */ | |
1579 | ||
1580 | return FALSE; | |
1581 | } | |
1582 | else | |
1583 | { | |
1584 | sRef farr = sRef_constructDeadDeref (fref); | |
1585 | ||
27c9e640 | 1586 | return (checkCompletelyDestroyed (fexp, farr, FALSE, FALSE, |
1587 | loc, depth + 1, desc, hideErrors)); | |
28bf4b0b | 1588 | } |
1589 | } | |
1590 | else if (ctype_isStruct (ct)) | |
1591 | { | |
1592 | /* | |
1593 | ** for structures, each field must be completely destroyed | |
1594 | */ | |
1595 | ||
1596 | bool isOk = TRUE; | |
1597 | uentryList fields = ctype_getFields (ct); | |
1598 | ||
1599 | DPRINTF (("Struct fields: %s", uentryList_unparse (fields))); | |
1600 | ||
1601 | if (depth >= MAXDEPTH) | |
1602 | { | |
1603 | llquietbug (message ("checkCompletelyDestroyed (fields): too deep: %s / %q", | |
1604 | exprNode_unparse (fexp), | |
1605 | sRef_unparseFull (fref))); | |
1606 | ||
1607 | return TRUE; | |
1608 | } | |
1609 | else | |
1610 | { | |
1611 | uentryList_elements (fields, ue) | |
1612 | { | |
1613 | sRef field = sRef_makeField (fref, uentry_rawName (ue)); | |
1614 | ||
1615 | /* | |
1616 | ** note order of && operands --- want to report multiple errors | |
1617 | */ | |
1618 | ||
1619 | DPRINTF (("Check field: %s", sRef_unparseFull (field))); | |
1620 | ||
27c9e640 | 1621 | isOk = (checkCompletelyDestroyed (fexp, field, FALSE, TRUE, |
1622 | loc, depth + 1, desc, hideErrors) | |
28bf4b0b | 1623 | && isOk); |
1624 | } end_uentryList_elements; | |
1625 | } | |
27c9e640 | 1626 | |
28bf4b0b | 1627 | return isOk; |
1628 | } | |
1629 | else | |
1630 | { | |
1631 | return TRUE; | |
1632 | } | |
1633 | } | |
1634 | ||
1635 | void | |
2e127cb8 | 1636 | transferChecks_return (exprNode fexp, uentry rval) |
28bf4b0b | 1637 | { |
1638 | sRef uref = uentry_getSref (rval); | |
1639 | sRef rref = sRef_makeNew (sRef_getType (uref), uref, cstring_undefined); | |
1640 | uentry fcn = context_getHeader (); | |
1641 | sRef fref = exprNode_getSref (fexp); | |
1642 | stateClauseList clauses = uentry_getStateClauseList (fcn); | |
1643 | ||
1644 | DPRINTF (("Check return: %s as %s = %s", | |
1645 | exprNode_unparse (fexp), | |
1646 | sRef_unparseFull (uref), | |
1647 | sRef_unparseFull (rref))); | |
1648 | ||
1649 | /* evans 2001-07-18: removed: if (sRef_isStateSpecial (rref)) */ | |
1650 | ||
1651 | DPRINTF (("Check state clauses: %s", | |
1652 | stateClauseList_unparse (clauses))); | |
1653 | ||
1654 | stateClauseList_postElements (clauses, cl) | |
1655 | { | |
1656 | if (stateClause_isGlobal (cl)) | |
1657 | { | |
1658 | ; /*@i32@*/ | |
1659 | } | |
1660 | else if (stateClause_setsMetaState (cl)) | |
1661 | { | |
1662 | sRefSet refs = stateClause_getRefs (cl); | |
1663 | qual ql = stateClause_getMetaQual (cl); | |
1664 | annotationInfo ainfo = qual_getAnnotationInfo (ql); | |
1665 | metaStateInfo minfo = annotationInfo_getState (ainfo); | |
1666 | cstring key = metaStateInfo_getName (minfo); | |
1667 | int mvalue = annotationInfo_getValue (ainfo); | |
1668 | ||
1669 | DPRINTF (("Return check: %s", stateClause_unparse (cl))); | |
1670 | ||
1671 | sRefSet_elements (refs, el) | |
1672 | { | |
1673 | sRef base = sRef_getRootBase (el); | |
1674 | ||
1675 | DPRINTF (("Sets meta state! %s", stateClause_unparse (cl))); | |
1676 | ||
1677 | if (sRef_isResult (base)) | |
1678 | { | |
1679 | sRef sr = sRef_fixBase (el, fref); | |
1680 | ||
1681 | if (!sRef_checkMetaStateValue (sr, key, mvalue)) | |
1682 | { | |
1683 | if (optgenerror | |
1684 | (FLG_STATETRANSFER, | |
1685 | message ("Result state %q does not satisfy ensures " | |
2c88d156 | 1686 | "clause: %q (state is %q, should be %s): %s", |
28bf4b0b | 1687 | sRef_unparse (sr), |
1688 | stateClause_unparse (cl), | |
1689 | stateValue_unparseValue (sRef_getMetaStateValue (sr, key), | |
1690 | minfo), | |
1691 | metaStateInfo_unparseValue (minfo, mvalue), | |
1692 | exprNode_unparse (fexp)), | |
1693 | exprNode_loc (fexp))) | |
1694 | { | |
1695 | sRef_showAliasInfo (sr); | |
1696 | /*@i32@*/ | |
1697 | } | |
1698 | } | |
1699 | } | |
1700 | else | |
1701 | { | |
1702 | /* | |
1703 | ** Non-results are checked in exit scope. | |
1704 | */ | |
1705 | } | |
1706 | } end_sRefSet_elements ; | |
1707 | } | |
1708 | else | |
1709 | { | |
1710 | sRefSet refs = stateClause_getRefs (cl); | |
1711 | sRefTest tst = stateClause_getPostTestFunction (cl); | |
1712 | sRefMod modf = stateClause_getReturnEffectFunction (cl); | |
1713 | ||
1714 | DPRINTF (("Clause: %s / %s", | |
1715 | stateClause_unparse (cl), | |
1716 | sRefSet_unparse (refs))); | |
1717 | ||
1718 | sRefSet_elements (refs, el) | |
1719 | { | |
1720 | sRef base = sRef_getRootBase (el); | |
1721 | ||
1722 | DPRINTF (("el: %s / %s", sRef_unparse (el), | |
1723 | sRef_unparse (base))); | |
1724 | ||
1725 | if (sRef_isResult (base)) | |
1726 | { | |
1727 | sRef sr = sRef_fixBase (el, fref); | |
1728 | ||
1729 | if (tst != NULL && !(tst (sr))) | |
1730 | { | |
1731 | if (optgenerror | |
1732 | (stateClause_postErrorCode (cl), | |
1733 | message ("%s storage %q corresponds to " | |
1734 | "storage %q listed in %q clause: %s", | |
1735 | stateClause_postErrorString (cl, sr), | |
1736 | sRef_unparse (sr), | |
1737 | sRef_unparse (el), | |
1738 | stateClause_unparseKind (cl), | |
1739 | exprNode_unparse (fexp)), | |
1740 | exprNode_loc (fexp))) | |
1741 | { | |
1742 | sRefShower ss = stateClause_getPostTestShower (cl); | |
1743 | ||
1744 | if (ss != NULL) | |
1745 | { | |
1746 | ss (sr); | |
1747 | } | |
1748 | } | |
1749 | } | |
1750 | ||
1751 | if (modf != NULL) | |
1752 | { | |
1753 | modf (sr, exprNode_loc (fexp)); | |
1754 | } | |
1755 | } | |
1756 | else | |
1757 | { | |
1758 | /* | |
1759 | ** Non-results are checked in exit scope. | |
1760 | */ | |
1761 | } | |
1762 | } end_sRefSet_elements ; | |
1763 | } | |
1764 | } end_stateClauseList_postElements ; | |
1765 | ||
1766 | if (ctype_isRealSU (exprNode_getType (fexp))) | |
1767 | { | |
1768 | sRef ffref = exprNode_getSref (fexp); | |
1769 | ||
1770 | checkStructTransfer (exprNode_undefined, rref, | |
1771 | fexp, ffref, | |
1772 | exprNode_loc (fexp), | |
1773 | TT_FCNRETURN); | |
1774 | } | |
1775 | else | |
1776 | { | |
1777 | (void) checkTransfer (fexp, exprNode_getSref (fexp), | |
1778 | exprNode_undefined, rref, | |
0bf5022d | 1779 | exprNode_undefined, |
28bf4b0b | 1780 | exprNode_loc (fexp), TT_FCNRETURN); |
1781 | } | |
1782 | } | |
1783 | ||
1784 | static void | |
1785 | checkPassstateClauseList (uentry ue, exprNode fexp, sRef fref, int argno) | |
1786 | { | |
1787 | stateClauseList clauses = uentry_getStateClauseList (ue); | |
1788 | ||
1789 | DPRINTF (("Check pass special: %s / %s", | |
1790 | exprNode_unparse (fexp), sRef_unparseFull (fref))); | |
1791 | ||
1792 | stateClauseList_preElements (clauses, cl) | |
1793 | { | |
1794 | if (stateClause_isGlobal (cl)) | |
1795 | { | |
1796 | ; | |
1797 | } | |
1798 | else | |
1799 | { | |
1800 | sRefSet refs = stateClause_getRefs (cl); | |
1801 | sRefTest tst = stateClause_getPreTestFunction (cl); | |
1802 | sRefMod modf = stateClause_getEffectFunction (cl); | |
1803 | ||
1804 | sRefSet_elements (refs, el) | |
1805 | { | |
1806 | sRef base = sRef_getRootBase (el); | |
1807 | ||
1808 | if (sRef_isResult (base)) | |
1809 | { | |
1810 | ; /* nothing to check before */ | |
1811 | } | |
1812 | else if (sRef_isParam (base)) | |
1813 | { | |
1814 | if (sRef_getParam (base) == argno - 1) | |
1815 | { | |
1816 | sRef sb; | |
1817 | ||
1818 | DPRINTF (("Fix base: %s / %s", | |
1819 | sRef_unparseFull (el), | |
1820 | sRef_unparseFull (fref))); | |
1821 | ||
1822 | sb = sRef_fixBase (el, fref); | |
1823 | ||
1824 | if (tst != NULL && !(tst(sb))) | |
1825 | { | |
1826 | voptgenerror | |
1827 | (stateClause_preErrorCode (cl), | |
1828 | message ("%s storage %qcorresponds to " | |
1829 | "storage listed in %q clause of " | |
1830 | "called function: %s", | |
1831 | stateClause_preErrorString (cl, sb), | |
1832 | sRef_unparseOpt (sb), | |
1833 | stateClause_unparseKind (cl), | |
1834 | exprNode_unparse (fexp)), | |
1835 | exprNode_loc (fexp)); | |
1836 | } | |
1837 | ||
1838 | if (modf != NULL) | |
1839 | { | |
1840 | DPRINTF (("Fixing: %s", sRef_unparseFull (sb))); | |
1841 | modf (sb, exprNode_loc (fexp)); | |
1842 | DPRINTF (("==> %s", sRef_unparseFull (sb))); | |
1843 | } | |
1844 | } | |
1845 | } | |
1846 | else | |
1847 | { | |
1848 | BADBRANCH; | |
1849 | } | |
1850 | } end_sRefSet_elements ; | |
1851 | } | |
1852 | } end_stateClauseList_preElements ; | |
1853 | ||
1854 | DPRINTF (("After: %s", sRef_unparseFull (fref))); | |
1855 | } | |
1856 | ||
1857 | /* | |
1858 | ** should not modify arg | |
1859 | */ | |
1860 | ||
1861 | void | |
2e127cb8 | 1862 | transferChecks_passParam (exprNode fexp, uentry arg, bool isSpec, |
1863 | /*@dependent@*/ exprNode fcn, int argno, int totargs) | |
28bf4b0b | 1864 | { |
1865 | sRef tref = uentry_getSref (arg); | |
1866 | sRef fref = exprNode_getSref (fexp); | |
1867 | bool isOut = FALSE; | |
1868 | bool isPartial = FALSE; | |
1869 | bool isImpOut = FALSE; | |
1870 | ctype ct = uentry_getType (arg); | |
1871 | ||
1872 | DPRINTF (("Check pass: %s -> %s", | |
1873 | sRef_unparseFull (fref), | |
1874 | sRef_unparseFull (tref))); | |
1875 | ||
1876 | atFunction = fcn; | |
1877 | atArgNo = argno; | |
1878 | atNumArgs = totargs; | |
1879 | ||
1880 | if (ctype_isElips (ct)) | |
1881 | { | |
1882 | ct = ctype_unknown; | |
1883 | } | |
1884 | ||
1885 | DPRINTF (("Out arg: %s", bool_unparse (uentry_isOut (arg)))); | |
1886 | ||
1887 | if (!ctype_isElips (ct) && | |
1888 | (ctype_isVoidPointer (ct) && uentry_isOut (arg) && sRef_isOnly (tref))) | |
1889 | { | |
1890 | if (ctype_isRealAP (ct)) | |
1891 | { | |
1892 | if (sRef_aliasCheckSimplePred (sRef_isDead, fref)) | |
1893 | { | |
1894 | if (optgenerror | |
1895 | (FLG_USERELEASED, | |
1896 | message ("Dead storage %qpassed as out parameter to %s: %s", | |
1897 | sRef_unparseOpt (fref), | |
1898 | exprNode_unparse (fcn), | |
1899 | exprNode_unparse (fexp)), | |
1900 | exprNode_loc (fexp))) | |
1901 | { | |
1902 | if (sRef_isDead (fref)) | |
1903 | { | |
1904 | sRef_showStateInfo (fref); | |
1905 | } | |
1906 | else | |
1907 | { | |
1908 | DPRINTF (("Not really dead!")); | |
1909 | sRef_showStateInfo (fref); | |
1910 | } | |
1911 | } | |
1912 | ||
1913 | sRef_setAllocated (fref, exprNode_loc (fexp)); | |
1914 | } | |
1915 | else if (context_getFlag (FLG_STRICTUSERELEASED) | |
1916 | && sRef_aliasCheckSimplePred (sRef_isPossiblyDead, fref)) | |
1917 | { | |
1918 | if (optgenerror2 | |
1919 | (FLG_USERELEASED, FLG_STRICTUSERELEASED, | |
1920 | message ("Possibly dead storage %qpassed as out parameter: %s", | |
1921 | sRef_unparseOpt (fref), | |
1922 | exprNode_unparse (fexp)), | |
1923 | exprNode_loc (fexp))) | |
1924 | { | |
1925 | if (sRef_isPossiblyDead (fref)) | |
1926 | { | |
1927 | sRef_showStateInfo (fref); | |
1928 | } | |
1929 | } | |
1930 | ||
1931 | sRef_setAllocated (fref, exprNode_loc (fexp)); | |
1932 | } | |
1933 | else if (sRef_aliasCheckSimplePred (sRef_isStateUndefined, fref) | |
1934 | || sRef_aliasCheckSimplePred (sRef_isUnuseable, fref)) | |
1935 | { | |
1936 | voptgenerror | |
1937 | (FLG_USEDEF, | |
1938 | message ("Unallocated storage %qpassed as out parameter: %s", | |
1939 | sRef_unparseOpt (fref), | |
1940 | exprNode_unparse (fexp)), | |
1941 | exprNode_loc (fexp)); | |
1942 | ||
1943 | sRef_setAllocated (fref, exprNode_loc (fexp)); | |
1944 | } | |
1945 | else | |
1946 | { | |
1947 | ; | |
1948 | } | |
1949 | } | |
1950 | ||
27c9e640 | 1951 | (void) checkCompletelyDestroyed (fexp, fref, TRUE, FALSE, |
1952 | exprNode_loc (fexp), 0, DSC_PARAM, FALSE); | |
28bf4b0b | 1953 | |
1954 | /* make it defined now, so checkTransfer is okay */ | |
1955 | sRef_setDefined (fref, exprNode_loc (fexp)); | |
1956 | } | |
1957 | else if (uentry_isOut (arg)) | |
1958 | { | |
1959 | DPRINTF (("Here we are!")); | |
1960 | ||
1961 | if (ctype_isRealAP (ct) | |
1962 | && (sRef_isStateUndefined (fref) || sRef_isUnuseable (fref))) | |
1963 | { | |
1964 | voptgenerror | |
1965 | (FLG_USEDEF, | |
1966 | message ("Unallocated storage %qpassed as out parameter to %s: %s", | |
1967 | sRef_unparseOpt (fref), | |
1968 | exprNode_unparse (fcn), | |
1969 | exprNode_unparse (fexp)), | |
1970 | exprNode_loc (fexp)); | |
1971 | sRef_setAllocated (fref, exprNode_loc (fexp)); | |
1972 | } | |
1973 | else if (sRef_isDead (fref)) | |
1974 | { | |
1975 | if (optgenerror | |
1976 | (FLG_USERELEASED, | |
1977 | message ("Dead storage %qpassed as out parameter to %s: %s", | |
1978 | sRef_unparseOpt (fref), | |
1979 | exprNode_unparse (fcn), | |
1980 | exprNode_unparse (fexp)), | |
1981 | exprNode_loc (fexp))) | |
1982 | { | |
1983 | sRef_showStateInfo (fref); | |
1984 | sRef_setAllocated (fref, exprNode_loc (fexp)); | |
1985 | } | |
1986 | } | |
1987 | else if (sRef_isPossiblyDead (fref)) | |
1988 | { | |
1989 | if (optgenerror2 | |
1990 | (FLG_USERELEASED, FLG_STRICTUSERELEASED, | |
1991 | message ("Possibly dead storage %qpassed as out parameter to %s: %s", | |
1992 | sRef_unparseOpt (fref), | |
1993 | exprNode_unparse (fcn), | |
1994 | exprNode_unparse (fexp)), | |
1995 | exprNode_loc (fexp))) | |
1996 | { | |
1997 | sRef_showStateInfo (fref); | |
1998 | sRef_setAllocated (fref, exprNode_loc (fexp)); | |
1999 | } | |
2000 | } | |
2001 | else | |
2002 | { | |
2003 | ; | |
2004 | } | |
2005 | ||
2006 | isOut = TRUE; | |
2007 | } | |
2008 | else if (uentry_isPartial (arg)) | |
2009 | { | |
2010 | if (ctype_isRealAP (ct) | |
2011 | && (sRef_isStateUndefined (fref) || sRef_isUnuseable (fref))) | |
2012 | { | |
2013 | voptgenerror | |
2014 | (FLG_USEDEF, | |
2015 | message ("Unallocated storage %qpassed as partial parameter: %s", | |
2016 | sRef_unparseOpt (fref), | |
2017 | exprNode_unparse (fexp)), | |
2018 | exprNode_loc (fexp)); | |
2019 | sRef_setAllocated (fref, exprNode_loc (fexp)); | |
2020 | } | |
2021 | else if (sRef_isDead (fref)) | |
2022 | { | |
2023 | if (optgenerror | |
2024 | (FLG_USERELEASED, | |
2025 | message ("Dead storage %qpassed as partial parameter to %s: %s", | |
2026 | sRef_unparseOpt (fref), | |
2027 | exprNode_unparse (fcn), | |
2028 | exprNode_unparse (fexp)), | |
2029 | exprNode_loc (fexp))) | |
2030 | { | |
2031 | sRef_showStateInfo (fref); | |
2032 | sRef_setAllocated (fref, exprNode_loc (fexp)); | |
2033 | } | |
2034 | } | |
2035 | else if (sRef_isPossiblyDead (fref)) | |
2036 | { | |
2037 | if (optgenerror2 | |
2038 | (FLG_USERELEASED, FLG_STRICTUSERELEASED, | |
2039 | message ("Possibly dead storage %qpassed as partial parameter to %s: %s", | |
2040 | sRef_unparseOpt (fref), | |
2041 | exprNode_unparse (fcn), | |
2042 | exprNode_unparse (fexp)), | |
2043 | exprNode_loc (fexp))) | |
2044 | { | |
2045 | sRef_showStateInfo (fref); | |
2046 | sRef_setAllocated (fref, exprNode_loc (fexp)); | |
2047 | } | |
2048 | } | |
2049 | else | |
2050 | { | |
2051 | ; | |
2052 | } | |
2053 | ||
2054 | isPartial = TRUE; | |
2055 | } | |
2056 | else if (uentry_isStateSpecial (arg)) | |
2057 | { | |
2058 | uentry ue = exprNode_getUentry (fcn); | |
2059 | ||
2060 | if (ctype_isRealAP (ct) | |
2061 | && (sRef_isStateUndefined (fref) || sRef_isUnuseable (fref))) | |
2062 | { | |
2063 | voptgenerror | |
2064 | (FLG_USEDEF, | |
2065 | message ("Unallocated storage %qpassed as special parameter: %s", | |
2066 | sRef_unparseOpt (fref), | |
2067 | exprNode_unparse (fexp)), | |
2068 | exprNode_loc (fexp)); | |
2069 | sRef_setAllocated (fref, exprNode_loc (fexp)); | |
2070 | } | |
2071 | else if (sRef_isDead (fref)) | |
2072 | { | |
2073 | if (optgenerror | |
2074 | (FLG_USERELEASED, | |
2075 | message ("Dead storage %qpassed as special parameter to %s: %s", | |
2076 | sRef_unparseOpt (fref), | |
2077 | exprNode_unparse (fcn), | |
2078 | exprNode_unparse (fexp)), | |
2079 | exprNode_loc (fexp))) | |
2080 | { | |
2081 | sRef_showStateInfo (fref); | |
2082 | sRef_setAllocated (fref, exprNode_loc (fexp)); | |
2083 | } | |
2084 | } | |
2085 | else if (sRef_isPossiblyDead (fref)) | |
2086 | { | |
2087 | if (optgenerror2 | |
2088 | (FLG_USERELEASED, FLG_STRICTUSERELEASED, | |
2089 | message ("Possibly dead storage %qpassed as special parameter to %s: %s", | |
2090 | sRef_unparseOpt (fref), | |
2091 | exprNode_unparse (fcn), | |
2092 | exprNode_unparse (fexp)), | |
2093 | exprNode_loc (fexp))) | |
2094 | { | |
2095 | sRef_showStateInfo (fref); | |
2096 | sRef_setAllocated (fref, exprNode_loc (fexp)); | |
2097 | } | |
2098 | } | |
2099 | else | |
2100 | { | |
2101 | ; | |
2102 | } | |
2103 | ||
2104 | if (uentry_hasStateClauseList (ue)) | |
2105 | { | |
2106 | checkPassstateClauseList (ue, fexp, fref, argno); | |
2107 | } | |
2108 | ||
2109 | return; /* ??? */ | |
2110 | } | |
2111 | else if (sRef_isStateDefined (tref)) | |
2112 | { | |
2113 | exprNode_checkUseParam (fexp); | |
2114 | } | |
2115 | else | |
2116 | { | |
2117 | if (isSpec || (!context_getFlag (FLG_IMPOUTS))) | |
2118 | { | |
2119 | exprNode_checkUseParam (fexp); | |
2120 | } | |
2121 | else | |
2122 | { | |
2123 | if (!sRef_isMacroParamRef (fref) | |
2124 | && (ctype_isRealAP (ct))) | |
2125 | { | |
2126 | if (sRef_isAddress (fref)) | |
2127 | { | |
2128 | if (sRef_isStateUndefined (fref) || sRef_isUnuseable (fref)) | |
2129 | { | |
2130 | voptgenerror | |
2131 | (FLG_USEDEF, | |
2132 | message | |
2133 | ("Unallocated address %qpassed as implicit " | |
2134 | "out parameter: %s", | |
2135 | sRef_unparseOpt (fref), | |
2136 | exprNode_unparse (fexp)), | |
2137 | exprNode_loc (fexp)); | |
2138 | sRef_setAllocated (fref, exprNode_loc (fexp)); | |
2139 | } | |
2140 | } | |
2141 | ||
2142 | /* yes, I really mean this! */ | |
2143 | tref = sRef_copy (tref); | |
2144 | sRef_setAllocated (tref, exprNode_loc (fexp)); | |
2145 | ||
2146 | isOut = TRUE; | |
2147 | isImpOut = TRUE; | |
2148 | } | |
2149 | else | |
2150 | { | |
2151 | exprNode_checkUseParam (fexp); | |
2152 | } | |
2153 | } | |
2154 | } | |
2155 | ||
2156 | if (sRef_isNew (fref)) | |
2157 | { | |
2158 | alkind tkind = sRef_getAliasKind (tref); | |
2159 | ||
2160 | if ((sRef_isFresh (fref) || sRef_isOnly (fref)) | |
2161 | && !alkind_isOnly (tkind) | |
2162 | && !alkind_isKeep (tkind) | |
2163 | && !alkind_isOwned (tkind) | |
2164 | && !alkind_isError (tkind) | |
2165 | && !uentry_isReturned (arg)) | |
2166 | ||
2167 | { | |
2168 | voptgenerror | |
2e127cb8 | 2169 | (FLG_MUSTFREEFRESH, |
28bf4b0b | 2170 | message ("New fresh storage %q(type %s) passed as %s (not released): %s", |
2171 | sRef_unparseOpt (fref), | |
2172 | ctype_unparse (sRef_getType (fref)), | |
2173 | alkind_unparse (sRef_getAliasKind (tref)), | |
2174 | exprNode_unparse (fexp)), | |
2175 | exprNode_loc (fexp)); | |
2e127cb8 | 2176 | |
28bf4b0b | 2177 | DPRINTF (("Fresh: %s", sRef_unparseFull (fref))); |
2178 | } | |
2179 | else | |
2180 | { | |
2181 | if (sRef_isNewRef (fref) && !sRef_isKillRef (tref)) | |
2182 | { | |
2183 | alkind ak = sRef_getAliasKind (tref); | |
2184 | ||
2185 | if (!alkind_isError (ak)) | |
2186 | { | |
2187 | voptgenerror | |
2e127cb8 | 2188 | (FLG_MUSTFREEFRESH, |
28bf4b0b | 2189 | message ("New reference %q(type %s) passed as %s (not released): %s", |
2190 | sRef_unparseOpt (fref), | |
2191 | ctype_unparse (sRef_getType (fref)), | |
2192 | alkind_unparse (sRef_getAliasKind (tref)), | |
2193 | exprNode_unparse (fexp)), | |
2194 | exprNode_loc (fexp)); | |
2195 | } | |
2196 | } | |
2197 | } | |
2198 | } | |
2199 | ||
2200 | (void) checkTransfer (fexp, exprNode_getSref (fexp), | |
2201 | exprNode_undefined, tref, | |
0bf5022d | 2202 | fcn, |
28bf4b0b | 2203 | exprNode_loc (fexp), TT_FCNPASS); |
2204 | ||
2205 | setCodePoint (); | |
2206 | fref = exprNode_getSref (fexp); | |
2207 | ||
2208 | if (isOut && !sRef_isDead (fref) && !sRef_isPossiblyDead (fref)) | |
2209 | { | |
2210 | sRef base; | |
2211 | ||
2212 | if (ctype_isRealAP (sRef_getType (fref))) | |
2213 | { | |
2214 | base = sRef_makePointer (fref); | |
2215 | } | |
2216 | else | |
2217 | { | |
2218 | base = fref; | |
2219 | } | |
2220 | ||
2221 | if (isImpOut) | |
2222 | { | |
2223 | exprNode_checkMSet (fexp, base); | |
2224 | } | |
2225 | else | |
2226 | { | |
2227 | exprNode_checkSet (fexp, base); | |
2228 | } | |
2229 | ||
2230 | if (sRef_isValid (base)) | |
2231 | { | |
2232 | setCodePoint (); | |
2233 | ||
2234 | sRef_clearDerived (base); | |
2235 | sRef_setDefined (base, exprNode_loc (fexp)); | |
2236 | usymtab_clearAlias (base); | |
2237 | sRef_setNullUnknown (base, exprNode_loc (fexp)); | |
2238 | } | |
2239 | } | |
2240 | ||
2241 | if (isPartial) | |
2242 | { | |
2243 | if (sRef_isValid (fref)) | |
2244 | { | |
2245 | sRef_setPartial (fref, exprNode_loc (fexp)); | |
2246 | } | |
2247 | } | |
2248 | ||
2249 | atFunction = exprNode_undefined; | |
2250 | atArgNo = 0; | |
2251 | atNumArgs = 0; | |
2252 | ||
2253 | /* need to fixup here: derived refs could be bogus */ | |
2254 | /* (better to change sRef to not add derivs for "protected" ref) */ | |
2255 | ||
2256 | uentry_fixupSref (arg); | |
2257 | ||
2258 | setCodePoint (); | |
2259 | ||
2260 | DPRINTF (("Check pass: ==> %s", | |
2261 | sRef_unparseFull (fref))); | |
2262 | } | |
2263 | ||
2264 | void | |
2e127cb8 | 2265 | transferChecks_globalReturn (uentry glob) |
28bf4b0b | 2266 | { |
2267 | sRef_protectDerivs (); | |
2268 | checkGlobTrans (glob, TT_GLOBRETURN); | |
2269 | sRef_clearProtectDerivs (); | |
2270 | } | |
2271 | ||
2e127cb8 | 2272 | void transferChecks_paramReturn (uentry actual) |
28bf4b0b | 2273 | { |
2274 | checkLeaveTrans (actual, TT_PARAMRETURN); | |
2275 | } | |
2276 | ||
2e127cb8 | 2277 | void transferChecks_loseReference (uentry actual) |
28bf4b0b | 2278 | { |
2279 | checkLeaveTrans (actual, TT_LEAVETRANS); | |
2280 | } | |
2281 | ||
2282 | static void | |
2283 | checkLeaveTrans (uentry actual, transferKind transferType) | |
2284 | { | |
2285 | sRef aref = uentry_getSref (actual); | |
2286 | sRef origref = uentry_getOrigSref (actual); | |
2287 | ||
2288 | if (transferType == TT_PARAMRETURN | |
2289 | && (sRef_isKeep (origref) || sRef_isOnly (origref) | |
2290 | || sRef_isOwned (origref))) | |
2291 | { | |
2292 | /* caller cannot use, nothing to check */ | |
2293 | } | |
2294 | else | |
2295 | { | |
2296 | if (sRef_isNSLocalVar (origref)) | |
2297 | { | |
2298 | ; | |
2299 | } | |
2300 | else | |
2301 | { | |
2302 | DPRINTF (("Leave trans: %s", uentry_unparseFull (actual))); | |
2303 | ||
2304 | (void) checkCompletelyDefined (exprNode_undefined, aref, aref, | |
2305 | exprNode_undefined, origref, | |
2306 | TRUE, FALSE, FALSE, | |
2307 | g_currentloc, transferType, | |
2308 | 0, TRUE); | |
2309 | } | |
2310 | } | |
2311 | } | |
2312 | ||
2313 | static void | |
2314 | checkGlobTrans (uentry glob, transferKind type) | |
2315 | { | |
2316 | sRef eref = uentry_getOrigSref (glob); | |
2e127cb8 | 2317 | |
2318 | DPRINTF (("Completely defined: %s", uentry_unparseFull (glob))); | |
2319 | ||
2320 | (void) checkCompletelyDefined (exprNode_undefined, uentry_getSref (glob), | |
2321 | uentry_getSref (glob), | |
28bf4b0b | 2322 | exprNode_undefined, eref, |
2323 | TRUE, FALSE, FALSE, | |
2324 | g_currentloc, type, 0, TRUE); | |
2325 | } | |
2326 | ||
2327 | /* | |
2328 | ** For lhs of assignment, alias kind is set from basic type. | |
2329 | ** Yoikes! | |
2330 | */ | |
2331 | ||
2332 | static void | |
2333 | fixAssignLhs (sRef s) | |
2334 | { | |
2335 | sRef_resetStateComplete (s); | |
2336 | } | |
2337 | ||
2338 | static void checkStructTransfer (exprNode lhs, sRef slhs, exprNode rhs, sRef srhs, | |
2339 | fileloc loc, | |
2340 | transferKind tt) | |
2341 | { | |
2342 | ctype st = ctype_realType (sRef_getType (srhs)); | |
2343 | ||
2344 | if (ctype_isSU (st) && ctype_isRealSU (sRef_getType (slhs)) | |
2345 | && ctype_match (sRef_getType (slhs), st)) | |
2346 | { | |
2347 | if (tt == TT_DOASSIGN && sRef_isStateDefined (srhs)) | |
2348 | { | |
2349 | sRef_setDefinedComplete (slhs, loc); | |
2350 | } | |
2351 | ||
2352 | if (sRef_isDependent (slhs) | |
2353 | || sRef_isObserver (slhs) | |
2354 | || sRef_isExposed (slhs)) | |
2355 | { | |
2356 | ; | |
2357 | } | |
2358 | else | |
2359 | { | |
2360 | if (sRef_isLocalVar (slhs) | |
2361 | && sRef_isFileOrGlobalScope (sRef_getRootBase (srhs))) | |
2362 | { | |
2363 | sRef_setDependent (slhs, exprNode_loc (lhs)); | |
2364 | } | |
2365 | else | |
2366 | { | |
2367 | if (ctype_isUnion (st)) | |
2368 | { | |
2369 | sRef_setDefState (slhs, sRef_getDefState (srhs), | |
2370 | exprNode_loc (lhs)); | |
2371 | ||
2372 | sRefSet_realElements (sRef_derivedFields (srhs), sr) | |
2373 | { | |
2374 | if (sRef_isField (sr)) | |
2375 | { | |
2376 | cstring fieldname = sRef_getField (sr); | |
2377 | sRef lfld = sRef_makeField (slhs, fieldname); | |
2378 | ||
2379 | (void) checkTransfer (rhs, sr, lhs, lfld, | |
0bf5022d | 2380 | exprNode_undefined, |
28bf4b0b | 2381 | exprNode_loc (lhs), tt); |
2382 | } | |
2383 | } end_sRefSet_realElements ; | |
2384 | } | |
2385 | else | |
2386 | { | |
2387 | uentryList fields = ctype_getFields (st); | |
2388 | ||
2389 | uentryList_elements (fields, field) | |
2390 | { | |
2391 | sRef rfld = sRef_makeField (srhs, uentry_rawName (field)); | |
2392 | sRef lfld = sRef_makeField (slhs, uentry_rawName (field)); | |
0bf5022d | 2393 | (void) checkTransfer (rhs, rfld, lhs, lfld, |
2394 | exprNode_undefined, | |
2395 | exprNode_loc (lhs), tt); | |
28bf4b0b | 2396 | } end_uentryList_elements ; |
2397 | } | |
2398 | ||
2399 | if (sRef_isOnly (srhs)) | |
2400 | { | |
2401 | sRef_setKeptComplete (srhs, loc); | |
2402 | } | |
2403 | } | |
2404 | } | |
2405 | } | |
2406 | } | |
2407 | ||
2408 | void | |
2e127cb8 | 2409 | transferChecks_initialization (exprNode lhs, exprNode rhs) |
28bf4b0b | 2410 | { |
2411 | sRef slhs = exprNode_getSref (lhs); | |
2412 | ||
2413 | if (sRef_isFileOrGlobalScope (slhs) || (!sRef_isCvar (slhs))) | |
2414 | { | |
2415 | (void) checkTransfer (rhs, exprNode_getSref (rhs), | |
0bf5022d | 2416 | lhs, slhs, |
2417 | exprNode_undefined, | |
2418 | exprNode_loc (rhs), TT_GLOBINIT); | |
28bf4b0b | 2419 | } |
2420 | else | |
2421 | { | |
2e127cb8 | 2422 | transferChecks_assign (lhs, rhs); |
28bf4b0b | 2423 | } |
2424 | } | |
2425 | ||
2426 | void | |
2e127cb8 | 2427 | transferChecks_assign (exprNode lhs, exprNode rhs) |
28bf4b0b | 2428 | { |
2429 | sRef slhs = exprNode_getSref (lhs); | |
2430 | sRef srhs = exprNode_getSref (rhs); | |
2431 | sRef base = sRef_getBaseSafe (slhs); | |
2432 | nstate ns; | |
2433 | ||
2434 | DPRINTF (("Check assign: %s = %s", exprNode_unparse (lhs), | |
2435 | exprNode_unparse (rhs))); | |
2436 | DPRINTF (("lhs: %s", sRef_unparseFull (slhs))); | |
2437 | DPRINTF (("rhs: %s", sRef_unparseFull (srhs))); | |
2438 | ||
2439 | if (ctype_isRealSU (sRef_getType (srhs))) | |
2440 | { | |
2441 | checkStructTransfer (lhs, slhs, rhs, srhs, exprNode_loc (lhs), TT_FIELDASSIGN); | |
2442 | } | |
2443 | else | |
2444 | { | |
2445 | DPRINTF (("lhs: %s", sRef_unparseFull (slhs))); | |
2446 | DPRINTF (("rhs: %s", sRef_unparseFull (srhs))); | |
2447 | (void) checkTransfer (rhs, srhs, lhs, slhs, | |
0bf5022d | 2448 | exprNode_undefined, |
28bf4b0b | 2449 | exprNode_loc (lhs), TT_DOASSIGN); |
2450 | DPRINTF (("lhs: %s", sRef_unparseFull (slhs))); | |
2451 | DPRINTF (("rhs: %s", sRef_unparseFull (srhs))); | |
2452 | } | |
2453 | ||
2454 | if (sRef_isConst (srhs) && sRef_isLocalState (srhs)) | |
2455 | { | |
2456 | /* constants can match anything (e.g., NULL) */ | |
2457 | sRef_setAliasKind (slhs, AK_ERROR, fileloc_undefined); | |
2458 | } | |
2459 | ||
2460 | if (sRef_isValid (base) && sRef_isStateDefined (base)) | |
2461 | { | |
2462 | sRef_setPdefined (base, g_currentloc); | |
2463 | } | |
2464 | ||
2465 | if (sRef_isPartial (srhs)) | |
2466 | { | |
2467 | sRef_setPartial (slhs, exprNode_loc (rhs)); | |
2468 | } | |
2469 | ||
2470 | ns = sRef_getNullState (srhs); | |
2471 | ||
2472 | if (nstate_possiblyNull (ns)) | |
2473 | { | |
2474 | if (usymtab_isGuarded (srhs)) | |
2475 | { | |
2476 | ns = NS_NOTNULL; | |
2477 | } | |
2478 | } | |
2479 | ||
2480 | sRef_setNullStateInnerComplete (slhs, ns, exprNode_loc (rhs)); | |
2481 | ||
2482 | if (sRef_isExposed (srhs) || sRef_isObserver (srhs)) | |
2483 | { | |
2484 | sRef_setExKind (slhs, sRef_getExKind (srhs), exprNode_loc (rhs)); | |
2485 | } | |
2486 | ||
2487 | DPRINTF (("Done transfer: %s", sRef_unparseFull (slhs))); | |
2488 | } | |
2489 | ||
2490 | static void | |
2491 | checkTransferNullAux (sRef fref, exprNode fexp, /*@unused@*/ bool ffix, | |
2492 | sRef tref, exprNode texp, /*@unused@*/ bool tfix, | |
2493 | fileloc loc, transferKind transferType) | |
2494 | { | |
2495 | alkind tkind = sRef_getAliasKind (tref); | |
2496 | ctype ttyp = ctype_realType (sRef_getType (tref)); | |
2497 | ||
2498 | if (ctype_isUnknown (ttyp)) | |
2499 | { | |
2500 | ttyp = exprNode_getType (texp); | |
2501 | ||
2502 | if (ctype_isUnknown (ttyp)) | |
2503 | { | |
2504 | ttyp = exprNode_getType (fexp); | |
2505 | ||
2506 | if (ctype_isUnknown (ttyp)) | |
2507 | { | |
2508 | ttyp = sRef_getType (fref); | |
2509 | } | |
2510 | } | |
2511 | } | |
2512 | ||
2513 | if (ctype_isFunction (ttyp) && (transferType == TT_FCNRETURN)) | |
2514 | { | |
2515 | ttyp = ctype_getReturnType (ttyp); | |
2516 | } | |
2517 | ||
2518 | /* | |
2519 | ** check for null (don't need to check aliases??) | |
2520 | */ | |
2521 | ||
2522 | if (sRef_possiblyNull (fref) | |
2523 | && !usymtab_isGuarded (fref) | |
2524 | && ctype_isRealAP (ttyp)) | |
2525 | { | |
2526 | if (!alkind_isLocal (tkind) && !alkind_isFresh (tkind) | |
2527 | && !sRef_perhapsNull (tref) | |
2528 | && !(transferType == TT_DOASSIGN)) | |
2529 | { | |
2530 | if (transferType == TT_GLOBINIT) | |
2531 | { | |
2532 | if (sRef_isNotNull (tref)) | |
2533 | { | |
2534 | if (optgenerror | |
2535 | (FLG_SYNTAX, /*@i432 kuldge flag... */ | |
2536 | message ("%s %q initialized to %s value: %q", | |
2537 | sRef_getScopeName (tref), | |
2538 | sRef_unparse (tref), | |
2539 | sRef_nullMessage (fref), | |
2540 | generateText (fexp, texp, tref, transferType)), | |
2541 | loc)) | |
2542 | { | |
2543 | sRef_showNullInfo (fref); | |
2544 | sRef_setNullError (tref); | |
2545 | } | |
2546 | } | |
2547 | else | |
2548 | { | |
2549 | if (optgenerror | |
2550 | (FLG_NULLASSIGN, | |
2551 | message ("%s %q initialized to %s value: %q", | |
2552 | sRef_getScopeName (tref), | |
2553 | sRef_unparse (tref), | |
2554 | sRef_nullMessage (fref), | |
2555 | generateText (fexp, texp, tref, transferType)), | |
2556 | loc)) | |
2557 | { | |
2558 | sRef_showNullInfo (fref); | |
2559 | sRef_setNullError (tref); | |
2560 | } | |
2561 | } | |
2562 | } | |
2563 | else | |
2564 | { | |
2565 | if (optgenerror | |
2566 | ((transferType == TT_FCNPASS) ? FLG_NULLPASS : FLG_NULLRET, | |
2567 | message ("%q storage %q%s: %q", | |
2568 | cstring_capitalize (sRef_nullMessage (fref)), | |
2569 | sRef_unparseOpt (fref), | |
2570 | transferNullMessage (transferType), | |
2571 | generateText (fexp, texp, tref, transferType)), | |
2572 | loc)) | |
2573 | { | |
2574 | sRef_showNullInfo (fref); | |
2575 | sRef_setNullError (fref); | |
2576 | } | |
2577 | } | |
2578 | } | |
2579 | else | |
2580 | { | |
2581 | ; | |
2582 | } | |
2583 | } | |
2584 | } | |
2585 | ||
2586 | ||
2587 | static void | |
2588 | checkTransferAssignAux (sRef fref, exprNode fexp, /*@unused@*/ bool ffix, | |
2589 | /*@exposed@*/ sRef tref, exprNode texp, bool tfix, | |
2590 | fileloc loc, transferKind transferType) | |
2591 | { | |
2592 | alkind tkind = sRef_getAliasKind (tref); | |
2593 | ||
2594 | /* | |
2595 | ** Assignment to same --- no errors, or state changes. | |
2596 | ** This can happen when returned params are used. | |
2597 | */ | |
2598 | ||
2599 | if (sRef_sameName (fref, tref)) | |
2600 | { | |
2601 | sRef_copyState (tref, fref); | |
2602 | return; | |
2603 | } | |
2604 | ||
2605 | if ((alkind_isOnly (tkind) || alkind_isFresh (tkind) | |
2606 | || alkind_isNewRef (tkind) || alkind_isOwned (tkind)) | |
2607 | && !(sRef_isDead (tref) | |
2608 | || sRef_isStateUndefined (tref) | |
2609 | || sRef_isUnuseable (tref) | |
2610 | || sRef_isPartial (tref) | |
2611 | || sRef_definitelyNull (tref) | |
2612 | || sRef_isStackAllocated (tref) | |
2613 | || sRef_isAllocIndexRef (tref)) | |
2614 | && !(sRef_same (fref, tref)) /* okay to assign to self (returned params) */ | |
2615 | && !(usymtab_isDefinitelyNull (tref))) | |
2616 | { | |
2e127cb8 | 2617 | if (transferChecks_canLoseReference (tref, loc)) |
28bf4b0b | 2618 | { |
2e127cb8 | 2619 | ; /* no error */ |
2620 | } | |
2621 | else | |
2622 | { | |
2623 | flagcode flg = sRef_isFresh (tref) ? FLG_MUSTFREEFRESH : FLG_MUSTFREEONLY; | |
2624 | ||
2625 | if (sRef_hasLastReference (tref)) | |
28bf4b0b | 2626 | { |
2e127cb8 | 2627 | if (optgenerror |
2628 | (flg, | |
2629 | message ("Last reference %q to %s storage %q(type %s) not released " | |
2630 | "before assignment: %q", | |
2631 | sRef_unparse (tref), | |
2632 | alkind_unparse (tkind), | |
2633 | sRef_unparseOpt (sRef_getAliasInfoRef (tref)), | |
2634 | ctype_unparse (sRef_getType (tref)), | |
2635 | generateText (fexp, texp, tref, transferType)), | |
2636 | loc)) | |
2637 | { | |
2638 | sRef_showRefLost (tref); | |
2639 | } | |
28bf4b0b | 2640 | } |
2641 | else | |
2642 | { | |
2e127cb8 | 2643 | if (context_inGlobalScope ()) |
28bf4b0b | 2644 | { |
2e127cb8 | 2645 | /* no errors for static initializations */ |
28bf4b0b | 2646 | } |
2e127cb8 | 2647 | else |
28bf4b0b | 2648 | { |
2e127cb8 | 2649 | /* |
2650 | ** don't report this error for a[i], since it could | |
2651 | ** be a new element. | |
2652 | */ | |
2653 | ||
2654 | if (alkind_isNewRef (tkind)) | |
28bf4b0b | 2655 | { |
2e127cb8 | 2656 | if (optgenerror |
2657 | (flg, | |
2658 | message | |
2659 | ("%q %q(type %s) not released before assignment: %q", | |
2660 | cstring_makeLiteral | |
2661 | (alkind_isKillRef (sRef_getOrigAliasKind (tref)) | |
2662 | ? "Kill reference parameter" : "New reference"), | |
2663 | sRef_unparseOpt (tref), | |
2664 | ctype_unparse (sRef_getType (tref)), | |
2665 | generateText (fexp, texp, tref, transferType)), | |
2666 | loc)) | |
28bf4b0b | 2667 | { |
2e127cb8 | 2668 | sRef_showAliasInfo (tref); |
2669 | sRef_setAliasKind (tref, AK_ERROR, loc); | |
28bf4b0b | 2670 | } |
2671 | } | |
2e127cb8 | 2672 | else if |
2673 | (!(sRef_isUnknownArrayFetch (tref) | |
2674 | && !context_getFlag (FLG_STRICTDESTROY)) | |
2675 | && !sRef_isUnionField (tref) | |
2676 | && !sRef_isRelDef (tref) | |
2677 | && optgenerror | |
2678 | (flg, | |
2679 | message | |
2680 | ("%s storage %q(type %s) not released before assignment: %q", | |
2681 | alkind_capName (tkind), | |
2682 | sRef_unparseOpt (tref), | |
2683 | ctype_unparse (sRef_getType (tref)), | |
2684 | generateText (fexp, texp, tref, transferType)), | |
2685 | loc)) | |
2686 | { | |
2687 | sRef_showAliasInfo (tref); | |
2688 | } | |
2689 | else | |
2690 | { | |
2691 | ; | |
2692 | } | |
28bf4b0b | 2693 | } |
2694 | } | |
2695 | } | |
2696 | } | |
2697 | ||
2698 | fixAssignLhs (tref); | |
2699 | ||
2700 | if (sRef_isRefCounted (tref)) /* tkind might not be correct now */ | |
2701 | { | |
2702 | if (sRef_isNewRef (fref)) | |
2703 | { | |
2704 | sRef_setAliasKind (tref, AK_NEWREF, loc); | |
2705 | } | |
2706 | else if (sRef_isConst (fref)) | |
2707 | { | |
2708 | /* for now, constants are not ref counted */ | |
2709 | sRef_setAliasKind (tref, AK_ERROR, loc); | |
2710 | } | |
2711 | else | |
2712 | { | |
2713 | ; | |
2714 | } | |
2715 | ||
2716 | if (!sRef_isNSLocalVar (tref) | |
2717 | && sRef_isRefCounted (fref) | |
2718 | && sRef_isStateDefined (fref)) | |
2719 | { | |
2720 | voptgenerror | |
2721 | (FLG_NEWREFTRANS, | |
2722 | message ("New reference %qto reference counted storage: %q", | |
2723 | sRef_unparseOpt (tref), | |
2724 | generateText (fexp, texp, tref, transferType)), | |
2725 | loc); | |
2726 | } | |
2727 | } | |
2728 | ||
2729 | /* | |
2730 | ** Not for structures and unions, since assignments copy. | |
2731 | */ | |
2732 | ||
2733 | if (sRef_isStack (fref) | |
2734 | && !ctype_isSU (ctype_realType (sRef_getType (fref)))) | |
2735 | { | |
2736 | sRef_setAliasKindComplete (tref, AK_STACK, loc); | |
2737 | } | |
2738 | ||
2739 | if (sRef_isNSLocalVar (tref) | |
2740 | && !sRef_isOwned (tref) /*< should only apply to static >*/ | |
2741 | && ctype_isMutable (sRef_getType (tref))) | |
2742 | { | |
2743 | if (sRef_isOnly (fref) && sRef_isNew (fref)) | |
2744 | { | |
2745 | if (!tfix) | |
2746 | { | |
2747 | sRef_setFresh (tref, loc); | |
2748 | } | |
2749 | } | |
2750 | } | |
2751 | } | |
2752 | ||
2753 | /* | |
2754 | ** requires sRef_isOnly (fref) | |
2755 | */ | |
2756 | ||
2757 | static void | |
2758 | checkOnlyTransferAux (sRef fref, exprNode fexp, bool ffix, | |
2759 | sRef tref, exprNode texp, /*@unused@*/ bool tfix, | |
2760 | fileloc loc, transferKind transferType) | |
2761 | { | |
2762 | alkind tkind = sRef_getAliasKind (tref); | |
2763 | ||
2764 | if (sRef_isExposed (tref) || sRef_isObserver (tref)) | |
2765 | { | |
2766 | if (transferType == TT_FCNRETURN && sRef_isNew (fref) | |
2767 | && !alkind_isError (tkind)) | |
2768 | { | |
2769 | if (optgenerror | |
2770 | (FLG_ONLYTRANS, | |
2771 | message ("Only storage %q%q (will not be released): %q", | |
2772 | sRef_unparseOpt (fref), | |
2773 | transferErrorMessage (transferType, tkind), | |
2774 | generateText (fexp, texp, tref, transferType)), | |
2775 | loc)) | |
2776 | { | |
2777 | sRef_showAliasInfo (fref); | |
2778 | } | |
2779 | } | |
2780 | ||
2781 | /* no errors for exposed transfers (is this good enough?) */ | |
2782 | } | |
2783 | else if (alkind_isOnly (tkind) || alkind_isKeep (tkind) || alkind_isOwned (tkind)) | |
2784 | { | |
2785 | ; /* okay */ | |
2786 | } | |
2787 | else if ((transferType == TT_FCNPASS) | |
2788 | && (alkind_isUnknown (tkind) | |
2789 | || alkind_isTemp (tkind) || alkind_isUnique (tkind))) | |
2790 | { | |
2791 | if (sRef_isFresh (fref) | |
2792 | && alkind_isUnknown (tkind) && !context_getFlag (FLG_PASSUNKNOWN)) | |
2793 | { | |
2794 | if (!ffix) sRef_setAliasKind (fref, AK_UNKNOWN, loc); | |
2795 | } | |
2796 | } | |
2797 | else if (alkind_isLocal (tkind) | |
2798 | || alkind_isFresh (tkind) || alkind_isUnknown (tkind)) | |
2799 | { | |
2800 | if ((transferType == TT_DOASSIGN) | |
2801 | && sRef_isNew (fref) | |
2802 | && sRef_isOnly (fref)) | |
2803 | { | |
2804 | bool error = FALSE; | |
2805 | ||
2806 | if (alkind_isUnknown (tkind) | |
2807 | && sRef_isFileOrGlobalScope (sRef_getRootBase (tref))) | |
2808 | { | |
2809 | if (optgenerror | |
2810 | (FLG_ONLYUNQGLOBALTRANS, | |
2811 | message ("Only storage %q%q: %q", | |
2812 | sRef_unparseOpt (fref), | |
2813 | transferErrorMessage (transferType, tkind), | |
2814 | generateText (fexp, texp, tref, transferType)), | |
2815 | loc)) | |
2816 | { | |
2817 | sRef_showAliasInfo (fref); | |
2818 | sRef_setAliasKind (tref, AK_ERROR, loc); | |
2819 | error = TRUE; | |
2820 | } | |
2821 | } | |
2822 | ||
2823 | if (!error && !ffix) | |
2824 | { | |
2825 | sRef_setFresh (tref, loc); | |
2826 | } | |
2827 | } | |
2828 | else | |
2829 | { | |
2830 | if (alkind_isLocal (tkind)) | |
2831 | { | |
2832 | if (sRef_sameName (tref, fref)) | |
2833 | { | |
2834 | ; /* don't set this --- corresponds to return transfer */ | |
2835 | } | |
2836 | else | |
2837 | { | |
2838 | /* | |
2839 | ** Don't set local to dependent. Error will | |
2840 | ** be detected through aliasing. Except for | |
2841 | ** arrays. | |
2842 | */ | |
2843 | ||
2844 | if (!tfix && sRef_isThroughArrayFetch (fref) | |
2845 | && context_getFlag (FLG_DEPARRAYS)) | |
2846 | { | |
2847 | sRef_setDependent (tref, loc); | |
2848 | } | |
2849 | } | |
2850 | } | |
2851 | else | |
2852 | { | |
2853 | if (optgenerror | |
2854 | (FLG_ONLYTRANS, | |
2855 | message ("Only storage %q%q: %q", | |
2856 | sRef_unparseOpt (fref), | |
2857 | transferErrorMessage (transferType, tkind), | |
2858 | generateText (fexp, texp, tref, transferType)), | |
2859 | loc)) | |
2860 | { | |
2861 | sRef_showAliasInfo (fref); | |
2862 | } | |
2863 | } | |
2864 | } | |
2865 | } | |
2866 | else | |
2867 | { | |
2868 | if (alkind_isError (tkind) | |
2869 | || (alkind_isUnknown (tkind) && !context_getFlag (FLG_MEMIMPLICIT))) | |
2870 | { | |
2871 | flagcode_recordSuppressed (FLG_ONLYTRANS); | |
2872 | } | |
2873 | else | |
2874 | { | |
2875 | if ((alkind_isKept (tkind) || alkind_isStack (tkind) | |
2876 | || alkind_isDependent (tkind)) | |
2877 | && sRef_isNSLocalVar (tref)) | |
2878 | { | |
2879 | ; /* okay */ | |
2880 | } | |
2881 | else | |
2882 | { | |
2883 | if (optgenerror | |
2884 | (FLG_ONLYTRANS, | |
2885 | message ("Only storage %q%q: %q", | |
2886 | sRef_unparseOpt (fref), | |
2887 | transferErrorMessage (transferType, tkind), | |
2888 | generateText (fexp, texp, tref, transferType)), | |
2889 | loc)) | |
2890 | { | |
2891 | sRef_showAliasInfo (fref); | |
2892 | ||
2893 | if (transferType == TT_DOASSIGN) | |
2894 | { | |
2895 | /* | |
2896 | ** alias kind unknown to suppress future messages | |
2897 | */ | |
2898 | ||
2899 | if (!ffix && sRef_isNSLocalVar (sRef_getRootBase (fref))) | |
2900 | { | |
2901 | sRef_clearAliasKind (fref); | |
2902 | } | |
2903 | } | |
2904 | } | |
2905 | } | |
2906 | } | |
2907 | } | |
2908 | } | |
2909 | ||
2910 | /* | |
2911 | ** ??? same as checkOnly ? | |
2912 | */ | |
2913 | ||
2914 | static void | |
2915 | checkOwnedTransferAux (sRef fref, exprNode fexp, bool ffix, | |
2916 | sRef tref, exprNode texp, bool tfix, | |
2917 | fileloc loc, transferKind transferType) | |
2918 | { | |
2919 | alkind tkind = sRef_getAliasKind (tref); | |
2920 | ||
2921 | if (sRef_isExposed (tref) || sRef_isObserver (tref)) | |
2922 | { | |
2923 | if (transferType == TT_FCNRETURN && sRef_isNew (fref)) | |
2924 | { | |
2925 | if (optgenerror | |
2926 | (FLG_OWNEDTRANS, | |
2927 | message ("Owned storage %q%q (will not be released): %q", | |
2928 | sRef_unparseOpt (fref), | |
2929 | transferErrorMessage (transferType, tkind), | |
2930 | generateText (fexp, texp, tref, transferType)), | |
2931 | loc)) | |
2932 | { | |
2933 | sRef_showAliasInfo (fref); | |
2934 | } | |
2935 | } | |
2936 | } | |
2937 | else if (alkind_isOnly (tkind) || alkind_isKeep (tkind) | |
2938 | || alkind_isDependent (tkind) | |
2939 | || alkind_isOwned (tkind)) | |
2940 | { | |
2941 | /* okay */ | |
2942 | } | |
2943 | else if (alkind_isLocal (tkind) | |
2944 | || alkind_isFresh (tkind) || alkind_isUnknown (tkind)) | |
2945 | { | |
2946 | if ((transferType == TT_DOASSIGN) | |
2947 | && sRef_isNew (fref) && sRef_isOnly (fref)) | |
2948 | { | |
2949 | if (!tfix) | |
2950 | { | |
2951 | sRef_setFresh (tref, loc); | |
2952 | } | |
2953 | } | |
2954 | else | |
2955 | { | |
2956 | } | |
2957 | } | |
2958 | else if ((transferType == TT_FCNPASS) | |
2959 | && (alkind_isUnknown (tkind) | |
2960 | || alkind_isTemp (tkind) || alkind_isUnique (tkind))) | |
2961 | { | |
2962 | if (sRef_isFresh (fref) | |
2963 | && alkind_isUnknown (tkind) && !context_getFlag (FLG_PASSUNKNOWN)) | |
2964 | { | |
2965 | if (!ffix) { sRef_clearAliasKind (fref); } | |
2966 | } | |
2967 | } | |
2968 | else | |
2969 | { | |
2970 | if (alkind_isUnknown (tkind) && !context_getFlag (FLG_MEMIMPLICIT)) | |
2971 | { | |
2972 | flagcode_recordSuppressed (FLG_OWNEDTRANS); | |
2973 | } | |
2974 | else | |
2975 | { | |
2976 | if (alkind_isKept (tkind) && sRef_isNSLocalVar (tref)) | |
2977 | { | |
2978 | ; /* okay */ | |
2979 | } | |
2980 | else | |
2981 | { | |
2982 | voptgenerror | |
2983 | (FLG_OWNEDTRANS, | |
2984 | message ("Owned storage %q%q: %q", | |
2985 | sRef_unparseOpt (fref), | |
2986 | transferErrorMessage (transferType, tkind), | |
2987 | generateText (fexp, texp, tref, transferType)), | |
2988 | loc); | |
2989 | } | |
2990 | } | |
2991 | ||
2992 | if (transferType == TT_DOASSIGN) | |
2993 | { | |
2994 | /* | |
2995 | ** alias kind unknown to suppress future messages | |
2996 | */ | |
2997 | ||
2998 | if (!ffix) { sRef_clearAliasKind (fref); } | |
2999 | } | |
3000 | } | |
3001 | } | |
3002 | ||
3003 | static void | |
3004 | checkFreshTransferAux (sRef fref, exprNode fexp, bool ffix, | |
3005 | sRef tref, exprNode texp, /*@unused@*/ bool tfix, | |
3006 | fileloc loc, transferKind transferType) | |
3007 | { | |
3008 | alkind tkind = sRef_getAliasKind (tref); | |
3009 | ||
3010 | /* | |
3011 | ** error to return fresh as non-only | |
3012 | */ | |
3013 | ||
3014 | if (transferType == TT_FCNRETURN | |
3015 | && !(alkind_isOnly (tkind) || alkind_isNewRef (tkind))) | |
3016 | { | |
3017 | if (alkind_isUnknown (tkind) && !context_getFlag (FLG_MEMIMPLICIT)) | |
3018 | { | |
3019 | flagcode_recordSuppressed (FLG_NEWREFTRANS); | |
3020 | } | |
3021 | else | |
3022 | { | |
3023 | if (alkind_isError (tkind)) | |
3024 | { | |
3025 | if (!ffix) | |
3026 | { | |
3027 | sRef_killComplete (fref, loc); | |
3028 | } | |
3029 | } | |
3030 | else if (alkind_isRefCounted (tkind)) | |
3031 | { | |
3032 | if (optgenerror | |
3033 | (FLG_NEWREFTRANS, | |
3034 | message | |
3035 | ("New reference returned without newref qualifier: %q", | |
3036 | generateText (fexp, texp, tref, transferType)), | |
3037 | loc)) | |
3038 | { | |
3039 | sRef_showAliasInfo (fref); | |
3040 | sRef_killComplete (fref, loc); | |
3041 | } | |
3042 | } | |
3043 | else | |
3044 | { | |
3045 | if (optgenerror | |
3046 | (FLG_FRESHTRANS, | |
3047 | message ("Fresh storage %q (should be only): %q", | |
3048 | transferErrorMessage (transferType, tkind), | |
3049 | generateText (fexp, texp, tref, transferType)), | |
3050 | loc)) | |
3051 | { | |
3052 | sRef_showAliasInfo (fref); | |
3053 | sRef_killComplete (fref, loc); | |
3054 | } | |
3055 | } | |
3056 | } | |
3057 | } | |
3058 | ||
3059 | /* | |
3060 | ** Okay to assign fresh to only, shared or unqualified. | |
3061 | ** | |
3062 | ** should generate other errors? | |
3063 | */ | |
3064 | ||
3065 | if (alkind_isOnly (tkind)) | |
3066 | { | |
3067 | if (transferType == TT_DOASSIGN && !sRef_isFileOrGlobalScope (tref)) | |
3068 | { | |
3069 | if (!ffix) | |
3070 | { | |
3071 | if (!sRef_isNSLocalVar (tref)) | |
3072 | { | |
3073 | sRef_setKeptComplete (fref, loc); | |
3074 | } | |
3075 | } | |
3076 | } | |
3077 | else | |
3078 | { | |
3079 | if (sRef_isConst (fref)) | |
3080 | { | |
3081 | ; | |
3082 | } | |
3083 | else | |
3084 | { | |
3085 | if (!ffix) | |
3086 | { | |
3087 | sRef_killComplete (fref, loc); | |
3088 | } | |
3089 | } | |
3090 | } | |
3091 | } | |
3092 | else if (alkind_isOwned (tkind)) | |
3093 | { | |
3094 | if (!ffix) | |
3095 | { | |
3096 | sRef_setDependentComplete (fref, loc); | |
3097 | } | |
3098 | } | |
3099 | else if (alkind_isRefCounted (tkind) | |
3100 | && (transferType == TT_FCNRETURN) && sRef_isFresh (fref)) | |
3101 | { | |
3102 | if (!ffix) | |
3103 | { | |
3104 | sRef_killComplete (fref, loc); | |
3105 | } | |
3106 | } | |
3107 | else if (alkind_isKeep (tkind)) | |
3108 | { | |
3109 | if (!ffix) | |
3110 | { | |
3111 | if (!sRef_isNSLocalVar (tref)) | |
3112 | { | |
3113 | sRef_setKeptComplete (fref, loc); | |
3114 | } | |
3115 | } | |
3116 | } | |
3117 | else if (alkind_isShared (tkind)) | |
3118 | { | |
3119 | if (!ffix) { sRef_setShared (fref, loc); } | |
3120 | } | |
3121 | else if (alkind_isLocal (tkind) || alkind_isUnknown (tkind)) | |
3122 | { | |
3123 | if (transferType == TT_DOASSIGN || transferType == TT_FCNRETURN) | |
3124 | { | |
3125 | /* | |
3126 | ** local shares fresh. Make it owned/dependent. | |
3127 | */ | |
3128 | ||
3129 | if (!tfix) | |
3130 | { | |
3131 | sRef_setOwned (tref, loc); | |
3132 | } | |
3133 | ||
3134 | if (!ffix && !tfix) | |
3135 | { | |
3136 | sRef_setDependentComplete (fref, loc); | |
3137 | } | |
3138 | ||
3139 | /* NO! sRef_clearAliasKind (fref); */ | |
3140 | } | |
3141 | else | |
3142 | { | |
3143 | if (context_getFlag (FLG_PASSUNKNOWN)) | |
3144 | { | |
3145 | sRef_clearAliasKind (fref); | |
3146 | } | |
3147 | } | |
3148 | } | |
3149 | else | |
3150 | { | |
3151 | ; | |
3152 | } | |
3153 | } | |
3154 | ||
3155 | static void | |
3156 | checkTransferExposure (sRef fref, exprNode fexp, /*@unused@*/ bool ffix, | |
3157 | sRef tref, exprNode texp, bool tfix, | |
3158 | fileloc loc, | |
3159 | transferKind transferType) | |
3160 | { | |
3161 | alkind fkind = sRef_getAliasKind (fref); | |
3162 | alkind tkind = sRef_getAliasKind (tref); | |
3163 | exkind tekind = sRef_getExKind (tref); | |
3164 | ||
3165 | if (sRef_isObserver (fref) && ctype_isMutable (sRef_getType (fref))) | |
3166 | { | |
3167 | /* | |
3168 | ** observer -> exposed or observer | |
3169 | */ | |
3170 | ||
3171 | /* | |
3172 | ** observer -> temp is okay [NO! really? only in function calls] | |
3173 | */ | |
3174 | ||
3175 | if (sRef_isExposed (tref) || sRef_isObserver (tref) | |
3176 | || alkind_isLocal (tkind)) | |
3177 | { | |
3178 | /* okay */ | |
3179 | ||
3180 | if ((transferType == TT_DOASSIGN) && alkind_isLocal (tkind)) | |
3181 | { | |
3182 | if (!tfix) | |
3183 | { | |
3184 | sRef_setAliasKindComplete (tref, fkind, loc); | |
3185 | } | |
3186 | } | |
3187 | } | |
3188 | else | |
3189 | { | |
3190 | if (transferType == TT_FCNRETURN | |
3191 | || transferType == TT_DOASSIGN | |
3192 | || transferType == TT_FIELDASSIGN | |
3193 | || transferType == TT_GLOBINIT) | |
3194 | { | |
3195 | bool hasError = FALSE; | |
3196 | ||
3197 | if (exprNode_isStringLiteral (fexp) | |
3198 | && transferType == TT_GLOBINIT) | |
3199 | { | |
3200 | hasError = optgenerror | |
3201 | (FLG_READONLYTRANS, | |
3202 | message ("Read-only string literal storage %q%q: %q", | |
3203 | sRef_unparseOpt (fref), | |
3204 | transferErrorExpMessage (transferType, tekind), | |
3205 | generateText (fexp, texp, tref, transferType)), | |
3206 | loc); | |
3207 | ||
3208 | sRef_setAliasKind (fref, AK_ERROR, fileloc_undefined); | |
3209 | } | |
3210 | else | |
3211 | { | |
3212 | if ((transferType == TT_DOASSIGN | |
3213 | || transferType == TT_FIELDASSIGN) | |
3214 | && (sRef_isNSLocalVar (tref) | |
3215 | || (exprNode_isStringLiteral (fexp) | |
3216 | && ctype_isRealArray (exprNode_getType (texp))))) | |
3217 | { | |
3218 | ; /* No error for local assignment or assignment | |
3219 | to static array (copies string). */ | |
3220 | } | |
3221 | else | |
3222 | { | |
3223 | if (exprNode_isStringLiteral (fexp)) | |
3224 | { | |
3225 | hasError = optgenerror | |
3226 | (FLG_READONLYTRANS, | |
3227 | message | |
3228 | ("Read-only string literal storage %q%q: %q", | |
3229 | sRef_unparseOpt (fref), | |
3230 | transferErrorExpMessage (transferType, tekind), | |
3231 | generateText (fexp, texp, tref, transferType)), | |
3232 | loc); | |
3233 | ||
3234 | } | |
3235 | ||
3236 | if (!hasError) | |
3237 | { | |
3238 | hasError = optgenerror | |
3239 | (FLG_OBSERVERTRANS, | |
3240 | message | |
3241 | ("Observer storage %q%q: %q", | |
3242 | sRef_unparseOpt (fref), | |
3243 | transferErrorExpMessage (transferType, tekind), | |
3244 | generateText (fexp, texp, tref, transferType)), | |
3245 | loc); | |
3246 | } | |
3247 | } | |
3248 | } | |
3249 | ||
3250 | if (hasError) | |
3251 | { | |
3252 | if (transferType != TT_GLOBINIT) | |
3253 | { | |
3254 | sRef_showExpInfo (fref); | |
3255 | sRef_setAliasKind (tref, AK_ERROR, loc); | |
3256 | } | |
3257 | } | |
3258 | else | |
3259 | { | |
3260 | if (transferType == TT_DOASSIGN && !tfix) | |
3261 | { | |
3262 | DPRINTF (("Setting unknown!")); | |
3263 | /* sRef_setAliasKind (tref, AK_ERROR, loc); */ | |
3264 | } | |
3265 | } | |
3266 | } | |
3267 | else /* TT_FCNPASS */ | |
3268 | { | |
3269 | llassert (transferType == TT_FCNPASS); | |
3270 | ||
3271 | if (alkind_isTemp (tkind) | |
3272 | || alkind_isDependent (tkind) | |
3273 | || alkind_isRefCounted (tkind)) | |
3274 | { | |
3275 | ; /* okay */ | |
3276 | } | |
3277 | else | |
3278 | { | |
3279 | if (!alkind_isError (tkind)) | |
3280 | { | |
3281 | if (optgenerror | |
3282 | (FLG_OBSERVERTRANS, | |
3283 | message ("Observer storage %q%q: %q", | |
3284 | sRef_unparseOpt (fref), | |
3285 | transferErrorMessage (transferType, tkind), | |
3286 | generateText (fexp, texp, tref, transferType)), | |
3287 | loc)) | |
3288 | { | |
3289 | sRef_showExpInfo (fref); | |
3290 | sRef_clearAliasState (fref, loc); | |
3291 | } | |
3292 | } | |
3293 | } | |
3294 | } | |
3295 | } | |
3296 | } | |
3297 | else if (sRef_isExposed (fref) && ctype_isMutable (sRef_getType (fref))) | |
3298 | { | |
3299 | if (transferType == TT_FCNRETURN) | |
3300 | { | |
3301 | if (!(sRef_isExposed (tref) || sRef_isObserver (tref) | |
3302 | || sRef_isParam (fref))) | |
3303 | { | |
3304 | if (optgenerror | |
3305 | (FLG_EXPOSETRANS, | |
3306 | message ("Exposed storage %q%q: %q", | |
3307 | sRef_unparseOpt (fref), | |
3308 | transferErrorExpMessage (transferType, tekind), | |
3309 | generateText (fexp, texp, tref, transferType)), | |
3310 | loc)) | |
3311 | { | |
3312 | sRef_showExpInfo (fref); | |
3313 | } | |
3314 | } | |
3315 | } | |
3316 | else if (transferType == TT_FCNPASS) | |
3317 | { | |
3318 | if (!(sRef_isExposed (tref) | |
3319 | || sRef_isObserver (tref) | |
3320 | || (alkind_isUnknown (tkind) | |
3321 | || alkind_isDependent (tkind) | |
3322 | || alkind_isTemp (tkind) | |
3323 | || alkind_isKillRef (tkind) | |
3324 | || alkind_isRefCounted (tkind)))) | |
3325 | { | |
3326 | if (alkind_isUnique (tkind) || alkind_isError (tkind)) | |
3327 | { | |
3328 | } | |
3329 | else | |
3330 | { | |
3331 | if (optgenerror | |
3332 | (FLG_EXPOSETRANS, | |
3333 | message ("Exposed storage %q%q: %q", | |
3334 | sRef_unparseOpt (fref), | |
3335 | transferErrorMessage (transferType, tkind), | |
3336 | generateText (fexp, texp, tref, transferType)), | |
3337 | loc)) | |
3338 | { | |
3339 | sRef_showExpInfo (fref); | |
3340 | sRef_clearAliasState (fref, loc); | |
3341 | } | |
3342 | } | |
3343 | ||
3344 | } | |
3345 | else | |
3346 | { | |
3347 | ; | |
3348 | } | |
3349 | } | |
2209bcb7 | 3350 | else if (transferType == TT_DOASSIGN |
3351 | /* evans 2001-10-05: added TT_FIELDASSIGN: */ | |
3352 | || transferType == TT_FIELDASSIGN) | |
28bf4b0b | 3353 | { |
3354 | if (!(sRef_isExposed (tref) | |
3355 | || !sRef_isCvar (tref) | |
3356 | || (alkind_isUnknown (tkind) | |
3357 | || alkind_isDependent (tkind) | |
3358 | || alkind_isRefCounted (tkind) | |
3359 | || alkind_isNewRef (tkind) | |
3360 | || alkind_isFresh (tkind) | |
3361 | || alkind_isLocal (tkind)))) | |
3362 | { | |
3363 | if (optgenerror | |
3364 | (FLG_EXPOSETRANS, | |
3365 | message ("Exposed storage %q%q: %q", | |
3366 | sRef_unparseOpt (fref), | |
3367 | transferErrorExpMessage (transferType, tekind), | |
3368 | generateText (fexp, texp, tref, transferType)), | |
3369 | loc)) | |
3370 | { | |
3371 | sRef_showExpInfo (fref); | |
3372 | } | |
3373 | } | |
3374 | if (!tfix) { sRef_setExposed (tref, loc); } | |
3375 | } | |
3376 | else | |
3377 | { | |
3378 | llassert (transferType == TT_GLOBPASS | |
3379 | || transferType == TT_GLOBRETURN | |
3380 | || transferType == TT_PARAMRETURN | |
3381 | || transferType == TT_LEAVETRANS | |
3382 | || transferType == TT_GLOBINIT); | |
3383 | } | |
3384 | } | |
3385 | else | |
3386 | { | |
3387 | ; | |
3388 | } | |
3389 | } | |
3390 | ||
3391 | /* | |
3392 | ** returns TRUE if there is no error reported | |
3393 | ** | |
3394 | ** if fixt, don't change tref (except if error reported.) | |
3395 | ** if fixf, don't change fref (except if error reported.) | |
3396 | */ | |
3397 | ||
3398 | static void | |
3399 | checkTransferAux (exprNode fexp, /*@exposed@*/ sRef fref, bool ffix, | |
3400 | exprNode texp, /*@exposed@*/ sRef tref, bool tfix, | |
3401 | fileloc loc, transferKind transferType) | |
3402 | { | |
3403 | alkind fkind; | |
3404 | alkind tkind; | |
3405 | bool isassign = (transferType == TT_DOASSIGN); | |
3406 | bool isfieldassign = (transferType == TT_FIELDASSIGN); | |
3407 | bool iseitherassign = isassign || (transferType == TT_FIELDASSIGN); | |
3408 | bool isfcnpass = (transferType == TT_FCNPASS); | |
3409 | bool isfcnreturn = (transferType == TT_FCNRETURN); | |
3410 | ||
3411 | setCodePoint (); | |
3412 | ||
3413 | if (!ffix && !tfix) | |
3414 | { | |
3415 | setCodePoint (); | |
3416 | checkTransferNullAux (fref, fexp, ffix, tref, texp, tfix, | |
3417 | loc, transferType); | |
3418 | } | |
3419 | ||
3420 | if (isassign) | |
3421 | { | |
3422 | setCodePoint (); | |
3423 | checkTransferAssignAux (fref, fexp, ffix, tref, texp, tfix, | |
3424 | loc, transferType); | |
3425 | } | |
3426 | ||
3427 | /* | |
3428 | ** Check for definition | |
3429 | */ | |
3430 | ||
3431 | /* | |
3432 | ** errors passing out params already detected in checkAnyCall | |
3433 | */ | |
3434 | ||
3435 | if (!ffix && !tfix) | |
3436 | { | |
3437 | bool defok = TRUE; | |
3438 | ||
3439 | if (!iseitherassign | |
3440 | || (!sRef_isNSLocalVar (tref) | |
3441 | && (sRef_isAnyDefined (tref) || !sRef_stateKnown (tref)))) | |
3442 | { | |
3443 | setCodePoint (); | |
3444 | ||
3445 | if (!ynm_toBoolRelaxed | |
3446 | (checkCompletelyDefined (fexp, fref, fref, | |
3447 | texp, tref, | |
3448 | TRUE, FALSE, FALSE, | |
3449 | loc, transferType, 0, TRUE))) | |
3450 | { | |
3451 | defok = FALSE; | |
3452 | } | |
3453 | } | |
3454 | ||
3455 | setCodePoint (); | |
3456 | ||
3457 | if (defok && iseitherassign) | |
3458 | { | |
3459 | sRef_setDefState (tref, sRef_getDefState (fref), loc); | |
3460 | } | |
3461 | } | |
3462 | ||
3463 | /* | |
3464 | ** check exposure | |
3465 | */ | |
3466 | ||
3467 | setCodePoint (); | |
3468 | checkTransferExposure (fref, fexp, ffix, tref, texp, tfix, | |
3469 | loc, transferType); | |
3470 | ||
3471 | fkind = sRef_getAliasKind (fref); | |
3472 | tkind = sRef_getAliasKind (tref); | |
3473 | ||
3474 | /* | |
3475 | ** check aliasing | |
3476 | */ | |
3477 | ||
3478 | if (alkind_isOnly (fkind)) | |
3479 | { | |
3480 | setCodePoint (); | |
3481 | checkOnlyTransferAux (fref, fexp, ffix, | |
3482 | tref, texp, tfix, | |
3483 | loc, transferType); | |
3484 | } | |
3485 | else if (alkind_isFresh (fkind)) | |
3486 | { | |
3487 | setCodePoint (); | |
3488 | checkFreshTransferAux (fref, fexp, ffix, | |
3489 | tref, texp, tfix, | |
3490 | loc, transferType); | |
3491 | } | |
3492 | else if (alkind_isOwned (fkind)) | |
3493 | { | |
3494 | setCodePoint (); | |
3495 | checkOwnedTransferAux (fref, fexp, ffix, | |
3496 | tref, texp, tfix, | |
3497 | loc, transferType); | |
3498 | } | |
3499 | else if (alkind_isDependent (fkind)) | |
3500 | { | |
3501 | setCodePoint (); | |
3502 | if (isfcnreturn && | |
3503 | (sRef_isExposed (tref) || sRef_isObserver (tref))) | |
3504 | { | |
3505 | ; /* okay */ | |
3506 | } | |
3507 | else if ((alkind_isOnly (tkind) || alkind_isKeep (tkind) | |
3508 | || alkind_isOwned (tkind)) | |
3509 | || (!isfcnpass && alkind_isTemp (tkind))) | |
3510 | { | |
3511 | bool error = TRUE; | |
3512 | ||
3513 | if (sRef_isLocalVar (fref)) | |
3514 | { | |
3515 | sRef depRef = dependentReference (fref); | |
3516 | ||
3517 | if (sRef_isValid (depRef) && sRef_isLocalVar (depRef)) | |
3518 | { | |
3519 | error = FALSE; | |
3520 | sRef_kill (depRef, loc); | |
3521 | sRef_kill (fref, loc); | |
3522 | } | |
3523 | ||
3524 | } | |
3525 | ||
3526 | if (isfieldassign) | |
3527 | { | |
3528 | error = FALSE; | |
3529 | } | |
3530 | ||
3531 | if (canLoseLocalReference (fref, loc)) | |
3532 | { | |
3533 | ; | |
3534 | } | |
3535 | else | |
3536 | { | |
3537 | if (error && | |
3538 | (optgenerror | |
3539 | (FLG_DEPENDENTTRANS, | |
3540 | message ("%s storage %q%q: %q", | |
3541 | alkind_capName (fkind), | |
3542 | sRef_unparseOpt (fref), | |
3543 | transferErrorMessage (transferType, tkind), | |
3544 | generateText (fexp, texp, tref, transferType)), | |
3545 | loc))) | |
3546 | { | |
3547 | DPRINTF (("Here: %s / %s", | |
3548 | sRef_unparseFull (fref), | |
3549 | sRef_unparseFull (tref))); | |
3550 | ||
3551 | sRef_showAliasInfo (fref); | |
3552 | } | |
3553 | } | |
3554 | } | |
3555 | else | |
3556 | { | |
3557 | if (isassign && (alkind_isFresh (tkind) || alkind_isLocal (tkind))) | |
3558 | { | |
3559 | if (!tfix && !ffix) | |
3560 | { | |
3561 | sRef_setDependent (tref, loc); | |
3562 | } | |
3563 | } | |
3564 | } | |
3565 | } | |
3566 | else if (alkind_isShared (fkind)) | |
3567 | { | |
3568 | setCodePoint (); | |
3569 | /* | |
3570 | ** xxx <- shared | |
3571 | */ | |
3572 | ||
3573 | if (alkind_isOnly (tkind) | |
3574 | || (!isfcnpass | |
3575 | && (!(sRef_isObserver (tref) || sRef_isExposed (tref)) | |
3576 | && alkind_isTemp (tkind)))) | |
3577 | { | |
3578 | if (optgenerror | |
3579 | (FLG_SHAREDTRANS, | |
3580 | message ("%s storage %q%q: %q", | |
3581 | alkind_capName (fkind), | |
3582 | sRef_unparseOpt (fref), | |
3583 | transferErrorMessage (transferType, tkind), | |
3584 | generateText (fexp, texp, tref, transferType)), | |
3585 | loc)) | |
3586 | { | |
3587 | sRef_showAliasInfo (fref); | |
3588 | } | |
3589 | } | |
3590 | else | |
3591 | { | |
3592 | if (alkind_isFresh (tkind) || alkind_isLocal (tkind)) | |
3593 | { | |
3594 | sRef_setShared (tref, loc); | |
3595 | } | |
3596 | } | |
3597 | } | |
3598 | else if (alkind_isKeep (fkind)) | |
3599 | { | |
3600 | setCodePoint (); | |
3601 | ||
3602 | if (alkind_isKeep (tkind) | |
3603 | || alkind_isLocal (tkind) | |
3604 | || (isfcnreturn && sRef_isExposed (tref)) | |
3605 | || (iseitherassign | |
3606 | && (alkind_isOnly (tkind) || alkind_isOwned (tkind)))) | |
3607 | { | |
3608 | sRef_setKept (fref, loc); | |
3609 | } | |
3610 | else if (isfcnpass | |
3611 | && (alkind_isTemp (tkind) || alkind_isOwned (tkind))) | |
3612 | { | |
3613 | ; | |
3614 | } | |
3615 | else | |
3616 | { | |
3617 | if (!alkind_isError (tkind)) | |
3618 | { | |
3619 | if (optgenerror | |
3620 | (FLG_KEEPTRANS, | |
3621 | message ("%s storage %q: %q", | |
3622 | alkind_capName (fkind), | |
3623 | transferErrorMessage (transferType, tkind), | |
3624 | generateText (fexp, texp, tref, transferType)), | |
3625 | loc)) | |
3626 | { | |
3627 | sRef_showAliasInfo (fref); | |
3628 | } | |
3629 | } | |
3630 | } | |
3631 | } | |
3632 | else if (alkind_isTemp (fkind) || alkind_isKept (fkind)) | |
3633 | { | |
3634 | /* | |
3635 | ** xxx <- temp | |
3636 | */ | |
3637 | ||
3638 | if (alkind_isOnly (tkind) | |
3639 | || alkind_isShared (tkind) | |
3640 | || (alkind_isTemp (fkind) | |
3641 | && !isfcnreturn && alkind_isDependent (tkind)) | |
3642 | || alkind_isOwned (tkind) | |
3643 | || alkind_isKeep (tkind)) | |
3644 | { | |
3645 | if (!exprNode_isNullValue (fexp) | |
3646 | && (ctype_isMutable (exprNode_getType (fexp)) | |
3647 | || (ctype_isArray (exprNode_getType (fexp)) | |
3648 | && sRef_isParam (fref))) | |
3649 | && (!iseitherassign || sRef_isReference (tref))) | |
3650 | { | |
3651 | if (sRef_isThroughArrayFetch (fref)) | |
3652 | { | |
3653 | if (optgenerror2 | |
3654 | (alkind_isTemp (fkind) ? FLG_TEMPTRANS : FLG_KEPTTRANS, | |
3655 | FLG_STRICTUSERELEASED, | |
3656 | message ("%s storage %q%q: %q", | |
3657 | alkind_capName (fkind), | |
3658 | sRef_unparseOpt (fref), | |
3659 | transferErrorMessage (transferType, tkind), | |
3660 | generateText (fexp, texp, tref, transferType)), | |
3661 | loc)) | |
3662 | { | |
3663 | sRef_showAliasInfo (fref); | |
3664 | } | |
3665 | } | |
3666 | else | |
3667 | { | |
3668 | if (optgenerror | |
3669 | (alkind_isTemp (fkind) ? FLG_TEMPTRANS : FLG_KEPTTRANS, | |
3670 | message ("%s storage %q%q: %q", | |
3671 | alkind_capName (fkind), | |
3672 | sRef_unparseOpt (fref), | |
3673 | transferErrorMessage (transferType, tkind), | |
3674 | generateText (fexp, texp, tref, transferType)), | |
3675 | loc)) | |
3676 | { | |
3677 | sRef_showAliasInfo (fref); | |
3678 | } | |
3679 | } | |
3680 | } | |
3681 | } | |
3682 | } | |
3683 | else if (alkind_isRefCounted (fkind) || alkind_isKillRef (fkind)) | |
3684 | { | |
3685 | if (alkind_isNewRef (tkind)) | |
3686 | { | |
3687 | /* | |
3688 | ** check that the refs field has been modified | |
3689 | */ | |
3690 | ||
3691 | if (!sRef_isConst (fref)) | |
3692 | { | |
3693 | voptgenerror | |
3694 | (FLG_REFCOUNTTRANS, | |
3695 | message ("Reference counted storage returned without modifying " | |
3696 | "reference count: %s", | |
3697 | exprNode_unparse (fexp)), | |
3698 | loc); | |
3699 | } | |
3700 | } | |
3701 | else if (iseitherassign) | |
3702 | { | |
3703 | if (alkind_isRefCounted (fkind)) | |
3704 | { | |
3705 | if (!sRef_isLocalVar (tref)) | |
3706 | { | |
3707 | vgenhinterror | |
3708 | (FLG_REFCOUNTTRANS, | |
3709 | message | |
3710 | ("Assignment to non-local from reference counted storage: %s", | |
3711 | exprNode_unparse (fexp)), | |
3712 | cstring_makeLiteral | |
3713 | ("Reference counted storage should call a function returning " | |
3714 | "a newref instead of direct assignments."), | |
3715 | loc); | |
3716 | } | |
3717 | else | |
3718 | { | |
3719 | ; | |
3720 | } | |
3721 | } | |
3722 | } | |
3723 | else /* fcnpass */ | |
3724 | { | |
3725 | if (alkind_isRefCounted (tkind) || alkind_isTemp (tkind)) | |
3726 | { | |
3727 | /* okay --- no change in state */ | |
3728 | } | |
3729 | else if (alkind_isKillRef (tkind)) | |
3730 | { | |
3731 | if (!ffix && !tfix && !(transferType == TT_FCNRETURN)) | |
3732 | { | |
3733 | sRef_killComplete (fref, loc); | |
3734 | } | |
3735 | } | |
3736 | else | |
3737 | { | |
3738 | if (!alkind_isError (tkind)) | |
3739 | { | |
3740 | voptgenerror | |
3741 | (FLG_REFCOUNTTRANS, | |
3742 | message ("Reference counted storage %q: %q", | |
3743 | transferErrorMessage (transferType, tkind), | |
3744 | generateText (fexp, texp, tref, transferType)), | |
3745 | loc); | |
3746 | } | |
3747 | } | |
3748 | } | |
3749 | } | |
3750 | else | |
3751 | { | |
3752 | ; | |
3753 | } | |
3754 | ||
3755 | setCodePoint (); | |
3756 | ||
3757 | if (alkind_isOnly (tkind) || alkind_isKeep (tkind)) | |
3758 | { | |
3759 | if (sRef_isAddress (fref)) | |
3760 | { | |
3761 | voptgenerror | |
3762 | (FLG_IMMEDIATETRANS, | |
3763 | message ("Immediate address %q %q: %q", | |
3764 | sRef_unparse (fref), | |
3765 | transferErrorMessage (transferType, tkind), | |
3766 | generateText (fexp, texp, tref, transferType)), | |
3767 | loc); | |
3768 | ||
3769 | sRef_setAliasKind (fref, AK_ERROR, loc); | |
3770 | } | |
3771 | else | |
3772 | { | |
3773 | if ((alkind_isUnknown (fkind) || alkind_isStatic (fkind)) | |
3774 | && !sRef_isDefinitelyNull (fref) | |
3775 | && (!ffix && !tfix) | |
3776 | && (!exprNode_isNullValue (fexp))) | |
3777 | { | |
3778 | flagcode errkind = alkind_isStatic (fkind) | |
3779 | ? FLG_STATICTRANS : FLG_UNKNOWNTRANS; | |
3780 | ||
3781 | if (transferType == TT_GLOBINIT) | |
3782 | { | |
3783 | if (errkind == FLG_STATICTRANS) | |
3784 | { | |
3785 | errkind = FLG_STATICINITTRANS; | |
3786 | } | |
3787 | else | |
3788 | { | |
3789 | errkind = FLG_UNKNOWNINITTRANS; | |
3790 | } | |
3791 | } | |
3792 | ||
3793 | if (optgenerror | |
3794 | (errkind, | |
3795 | message ("%s storage %s %q: %q", | |
3796 | alkind_capName (fkind), | |
3797 | exprNode_unparse (fexp), | |
3798 | transferErrorMessage (transferType, tkind), | |
3799 | generateText (fexp, texp, tref, transferType)), | |
3800 | loc)) | |
3801 | { | |
3802 | sRef_showAliasInfo (fref); | |
3803 | } | |
3804 | } | |
3805 | } | |
3806 | ||
3807 | /* don't kill shared to suppress future messages */ | |
3808 | if (!alkind_isShared (fkind)) | |
3809 | { | |
3810 | if (isassign) | |
3811 | { | |
3812 | if (!ffix) | |
3813 | { | |
3814 | /*< yuk! should do this in aliasaux >*/ | |
3815 | ||
3816 | if (!sRef_isNSLocalVar (tref) && !sRef_sameName (fref, tref)) | |
3817 | { | |
3818 | if (!tfix) | |
3819 | { | |
3820 | sRef_setKeptComplete (fref, loc); | |
3821 | } | |
3822 | else | |
3823 | { | |
3824 | sRef_setKept (fref, loc); | |
3825 | } | |
3826 | } | |
3827 | } | |
3828 | } | |
3829 | else | |
3830 | { | |
3831 | if (!ffix) | |
3832 | { | |
3833 | if (!tfix) | |
3834 | { | |
3835 | if (alkind_isKeep (tkind)) | |
3836 | { | |
3837 | sRef_setKeptComplete (fref, loc); | |
3838 | } | |
3839 | else | |
3840 | { | |
3841 | sRef_killComplete (fref, loc); | |
3842 | } | |
3843 | } | |
3844 | else | |
3845 | { | |
3846 | if (alkind_isKeep (tkind)) | |
3847 | { | |
3848 | sRef_setKept (fref, loc); | |
3849 | } | |
3850 | else | |
3851 | { | |
3852 | sRef_kill (fref, loc); | |
3853 | } | |
3854 | } | |
3855 | } | |
3856 | } | |
3857 | } | |
3858 | } | |
3859 | else if (alkind_isOwned (tkind)) | |
3860 | { | |
3861 | /* don't kill shared to suppress future messages */ | |
3862 | if (!alkind_isShared (fkind)) | |
3863 | { | |
3864 | if (!isassign | |
3865 | || !sRef_sameName (fref, tref)) /* result of return parameter */ | |
3866 | { | |
3867 | if (!ffix) | |
3868 | { | |
3869 | if (!tfix) | |
3870 | { | |
3871 | sRef_setDependentComplete (fref, loc); | |
3872 | } | |
3873 | else | |
3874 | { | |
3875 | sRef_setDependent (fref, loc); | |
3876 | } | |
3877 | } | |
3878 | } | |
3879 | } | |
3880 | } | |
3881 | else if (alkind_isShared (tkind)) | |
3882 | { | |
3883 | if (alkind_isFresh (fkind) || alkind_isLocal (fkind)) | |
3884 | { | |
3885 | if (!ffix) | |
3886 | { | |
3887 | sRef_setShared (fref, loc); | |
3888 | } | |
3889 | } | |
3890 | } | |
3891 | else if (alkind_isUnknown (tkind) && context_getFlag (FLG_MEMIMPLICIT)) | |
3892 | { | |
3893 | if (alkind_isDependent (fkind)) | |
3894 | { | |
3895 | if (!exprNode_isNullValue (fexp) | |
3896 | && ctype_isMutable (exprNode_getType (fexp)) | |
3897 | && (!iseitherassign || sRef_isReference (tref))) | |
3898 | { | |
2e127cb8 | 3899 | if (transferChecks_canLoseReference (fref, loc)) |
28bf4b0b | 3900 | { |
3901 | ; | |
3902 | } | |
3903 | else | |
3904 | { | |
3905 | if (optgenerror | |
3906 | (FLG_DEPENDENTTRANS, | |
3907 | message ("%s storage %q%q: %q", | |
3908 | alkind_capName (fkind), | |
3909 | sRef_unparseOpt (fref), | |
3910 | transferErrorMessage (transferType, tkind), | |
3911 | generateText (fexp, texp, tref, transferType)), | |
3912 | loc)) | |
3913 | { | |
3914 | DPRINTF (("Here: %s / %s", sRef_unparseFull (fref), | |
3915 | sRef_unparseFull (tref))); | |
3916 | sRef_showAliasInfo (fref); | |
3917 | } | |
3918 | } | |
3919 | } | |
3920 | } | |
3921 | } | |
3922 | else if (alkind_isNewRef (tkind)) | |
3923 | { | |
3924 | if (!ffix && !tfix) | |
3925 | { | |
3926 | sRef_killComplete (fref, loc); | |
3927 | } | |
3928 | } | |
3929 | else if (alkind_isKillRef (tkind)) | |
3930 | { | |
3931 | if (transferType == TT_FCNRETURN) | |
3932 | { | |
3933 | if (sRef_isNewRef (fref)) | |
3934 | { | |
3935 | if (optgenerror | |
3936 | (FLG_REFCOUNTTRANS, | |
3937 | message ("New reference returned as temp reference: %q", | |
3938 | generateText (fexp, texp, tref, transferType)), | |
3939 | loc)) | |
3940 | { | |
3941 | sRef_showAliasInfo (fref); | |
3942 | } | |
3943 | } | |
3944 | } | |
3945 | else | |
3946 | { | |
3947 | if (sRef_isNewRef (fref)) | |
3948 | { | |
3949 | sRef_killComplete (fref, loc); | |
3950 | } | |
3951 | else | |
3952 | { | |
3953 | if (sRef_isRefCounted (fref) | |
3954 | && sRef_isCvar (fref) | |
3955 | && !sRef_isLocalVar (fref)) | |
3956 | { | |
3957 | if (optgenerror | |
3958 | (FLG_REFCOUNTTRANS, | |
3959 | message | |
3960 | ("External reference counted storage released: %q", | |
3961 | generateText (fexp, texp, tref, transferType)), | |
3962 | loc)) | |
3963 | { | |
3964 | sRef_showAliasInfo (fref); | |
3965 | } | |
3966 | } | |
3967 | } | |
3968 | } | |
3969 | ||
3970 | } | |
3971 | else | |
3972 | { | |
3973 | ; | |
3974 | } | |
3975 | ||
3976 | setCodePoint (); | |
3977 | } | |
3978 | ||
3979 | static void | |
3980 | checkMetaStateConsistent (/*@exposed@*/ sRef fref, sRef tref, | |
3981 | fileloc loc, /*@unused@*/ transferKind transferType) | |
3982 | { | |
3983 | /* | |
3984 | ** Checks if it is consistent to leave storage marked as tref in state of fref. | |
3985 | */ | |
3986 | ||
3987 | valueTable fvalues = sRef_getValueTable (fref); | |
3988 | valueTable tvalues = sRef_getValueTable (tref); | |
3989 | ||
3990 | DPRINTF (("Metastate consistent: %s => %s", | |
3991 | sRef_unparseFull (fref), | |
3992 | sRef_unparseFull (tref))); | |
3993 | ||
3994 | if (valueTable_isUndefined (tvalues) || valueTable_isUndefined (fvalues)) { | |
3995 | /* Cannot check without value tables. An error was already detected. */ | |
3996 | DPRINTF (("No value table: %s / %s", | |
3997 | bool_unparse (valueTable_isUndefined (tvalues)), | |
3998 | bool_unparse (valueTable_isUndefined (fvalues)))); | |
3999 | return; | |
4000 | } | |
4001 | ||
4002 | valueTable_elements (fvalues, fkey, fval) { | |
4003 | stateValue tval; | |
4004 | metaStateInfo minfo; | |
4005 | ||
4006 | DPRINTF (("Transfer: %s", fkey)); | |
4007 | tval = valueTable_lookup (tvalues, fkey); | |
4008 | minfo = context_lookupMetaStateInfo (fkey); | |
4009 | ||
4010 | if (!stateValue_isDefined (tval)) | |
4011 | { | |
4012 | if (ctype_isUnknown (sRef_getType (fref))) | |
4013 | { | |
4014 | ; /* Okay, put in default values without knowing type */ | |
4015 | } | |
4016 | else | |
4017 | { | |
4018 | /*@i#!@!!@*/ | |
4019 | DPRINTF (("Cannot find meta state for: %s / to: %s / %s", sRef_unparseFull (fref), | |
4020 | sRef_unparseFull (tref), | |
4021 | fkey)); | |
4022 | } | |
4023 | } | |
4024 | else | |
4025 | { | |
4026 | llassert (metaStateInfo_isDefined (minfo)); | |
4027 | ||
4028 | if (stateValue_isError (fval) || stateValue_isError (tval)) | |
4029 | { | |
4030 | ; | |
4031 | } | |
b072092f | 4032 | else if (sRef_isDefinitelyNull (fref) |
4033 | || usymtab_isDefinitelyNull (fref)) | |
28bf4b0b | 4034 | { |
b072092f | 4035 | ; /* No errors for null values in state transfers. */ |
4036 | } | |
4037 | ||
4038 | else | |
4039 | { | |
4040 | stateCombinationTable sctable = metaStateInfo_getTransferTable (minfo); | |
4041 | cstring msg = cstring_undefined; | |
4042 | int nval = stateCombinationTable_lookup (sctable, | |
4043 | stateValue_getValue (fval), | |
4044 | stateValue_getValue (tval), | |
4045 | &msg); | |
28bf4b0b | 4046 | |
b072092f | 4047 | if (nval == stateValue_error) |
28bf4b0b | 4048 | { |
b072092f | 4049 | if (transferType == TT_LEAVETRANS) |
4050 | { | |
4051 | BADBRANCH; | |
4052 | } | |
4053 | else if (transferType == TT_GLOBRETURN) | |
4054 | { | |
4055 | if (optgenerror | |
4056 | (FLG_STATETRANSFER, | |
4057 | message | |
b7e84605 | 4058 | ("Function returns with global %q in inconsistent state (%q is %q, should be %q)%q", |
b072092f | 4059 | sRef_unparse (sRef_getRootBase (fref)), |
4060 | sRef_unparse (fref), | |
4061 | stateValue_unparseValue (fval, minfo), | |
4062 | stateValue_unparseValue (tval, minfo), | |
b7e84605 | 4063 | cstring_isDefined (msg) |
4064 | ? message (": %s", msg) : cstring_undefined), | |
b072092f | 4065 | loc)) |
4066 | { | |
4067 | sRef_showMetaStateInfo (fref, fkey); | |
4068 | } | |
4069 | } | |
4070 | else if (transferType == TT_GLOBPASS) | |
28bf4b0b | 4071 | { |
b072092f | 4072 | if (optgenerror |
4073 | (FLG_STATETRANSFER, | |
4074 | message | |
b7e84605 | 4075 | ("Function called with global %q in inconsistent state (%q is %q, should be %q)%q", |
b072092f | 4076 | sRef_unparse (sRef_getRootBase (fref)), |
4077 | stateValue_unparseValue (fval, minfo), | |
4078 | sRef_unparse (fref), | |
4079 | stateValue_unparseValue (tval, minfo), | |
b7e84605 | 4080 | cstring_isDefined (msg) |
4081 | ? message (": %s", msg) : cstring_undefined), | |
b072092f | 4082 | loc)) |
4083 | { | |
4084 | sRef_showMetaStateInfo (fref, fkey); | |
4085 | } | |
28bf4b0b | 4086 | } |
b072092f | 4087 | else if (transferType == TT_PARAMRETURN) |
4088 | { | |
4089 | if (optgenerror | |
4090 | (FLG_STATETRANSFER, | |
4091 | message | |
b7e84605 | 4092 | ("Function returns with parameter %q in inconsistent state (%q is %q, should be %q)%q", |
b072092f | 4093 | sRef_unparse (sRef_getRootBase (fref)), |
b7e84605 | 4094 | sRef_unparse (fref), |
b072092f | 4095 | stateValue_unparseValue (fval, minfo), |
b072092f | 4096 | stateValue_unparseValue (tval, minfo), |
b7e84605 | 4097 | cstring_isDefined (msg) |
4098 | ? message (": %s", msg) : cstring_undefined), | |
b072092f | 4099 | loc)) |
4100 | { | |
4101 | sRef_showMetaStateInfo (fref, fkey); | |
4102 | } | |
4103 | } | |
4104 | else | |
4105 | { | |
4106 | if (optgenerror | |
4107 | (FLG_STATETRANSFER, | |
4108 | message | |
b7e84605 | 4109 | ("Invalid transfer from %q %x to %q (%q)%q", |
b072092f | 4110 | stateValue_unparseValue (fval, minfo), |
4111 | sRef_unparse (fref), | |
4112 | stateValue_unparseValue (tval, minfo), | |
4113 | sRef_unparse (tref), | |
b7e84605 | 4114 | cstring_isDefined (msg) |
4115 | ? message (": %s", msg) : cstring_undefined), | |
b072092f | 4116 | loc)) |
4117 | { | |
4118 | sRef_showMetaStateInfo (fref, fkey); | |
4119 | } | |
4120 | } | |
4121 | ||
4122 | } | |
b7e84605 | 4123 | |
b072092f | 4124 | if (stateValue_getValue (fval) != nval) |
4125 | { | |
4126 | stateValue_updateValueLoc (fval, nval, loc); | |
28bf4b0b | 4127 | } |
28bf4b0b | 4128 | } |
4129 | } | |
4130 | ||
4131 | DPRINTF (("Transfer: %s %s -> %s", | |
4132 | fkey, stateValue_unparse (fval), stateValue_unparse (tval))); | |
4133 | } end_valueTable_elements ; | |
4134 | } | |
4135 | ||
4136 | static void | |
4137 | checkMetaStateTransfer (exprNode fexp, sRef fref, exprNode texp, sRef tref, | |
0bf5022d | 4138 | exprNode fcn, |
28bf4b0b | 4139 | fileloc loc, transferKind /*@i32@*/ transferType) |
4140 | { | |
4141 | valueTable fvalues = sRef_getValueTable (fref); | |
4142 | valueTable tvalues = sRef_getValueTable (tref); | |
4143 | ||
4144 | DPRINTF (("Metastate transfer: from %s", exprNode_unparse (fexp))); | |
c8dda690 | 4145 | |
28bf4b0b | 4146 | DPRINTF (("Metastate transfer: %s => %s", |
4147 | sRef_unparseFull (fref), | |
4148 | sRef_unparseFull (tref))); | |
4149 | ||
4150 | if (valueTable_isUndefined (tvalues) || valueTable_isUndefined (fvalues)) { | |
4151 | /* Cannot check without value tables. An error was already detected. */ | |
4152 | DPRINTF (("No value table: %s / %s", | |
4153 | bool_unparse (valueTable_isUndefined (tvalues)), | |
4154 | bool_unparse (valueTable_isUndefined (fvalues)))); | |
4155 | return; | |
4156 | } | |
4157 | ||
4158 | valueTable_elements (fvalues, fkey, fval) { | |
4159 | stateValue tval; | |
4160 | metaStateInfo minfo; | |
4161 | stateCombinationTable sctable; | |
4162 | cstring msg; | |
4163 | int nval; | |
4164 | ||
4165 | DPRINTF (("Transfer: %s", fkey)); | |
4166 | tval = valueTable_lookup (tvalues, fkey); | |
4167 | minfo = context_lookupMetaStateInfo (fkey); | |
4168 | ||
4169 | if (!stateValue_isDefined (tval)) | |
4170 | { | |
4171 | if (ctype_isUnknown (sRef_getType (fref))) | |
4172 | { | |
4173 | ; /* Okay, put in default values without knowing type */ | |
4174 | } | |
4175 | else | |
4176 | { | |
4177 | /*@i#!@!!@*/ | |
4178 | DPRINTF (("Metastate transfer: %s => %s", | |
4179 | exprNode_unparse (fexp), exprNode_unparse (texp))); | |
4180 | DPRINTF (("Cannot find meta state for: %s / to: %s / %s", sRef_unparseFull (fref), | |
4181 | sRef_unparseFull (tref), | |
4182 | fkey)); | |
4183 | } | |
4184 | } | |
4185 | else | |
4186 | { | |
4187 | llassert (metaStateInfo_isDefined (minfo)); | |
4188 | ||
990ec868 | 4189 | if (stateValue_isError (fval)) |
28bf4b0b | 4190 | { |
4191 | ; | |
4192 | } | |
990ec868 | 4193 | else if (stateValue_isError (tval)) |
4194 | { | |
4195 | if (sRef_isLocalVar (tref) && transferType == TT_DOASSIGN) | |
4196 | { | |
4197 | /* Local assignments just replace state. */ | |
4198 | stateValue_updateValueLoc (tval, stateValue_getValue (fval), loc); | |
4199 | DPRINTF (("Update: %s", stateValue_unparse (tval))); | |
4200 | } | |
4201 | else if (transferType == TT_FCNRETURN) | |
4202 | { | |
4203 | ; /* Returning from an unannotated function */ | |
4204 | } | |
4205 | else | |
4206 | { | |
b37cf05e | 4207 | DPRINTF (("Transfer to error: %s / %s", sRef_unparseFull (tref), |
4208 | transferType_unparse (transferType))); | |
990ec868 | 4209 | } |
4210 | } | |
28bf4b0b | 4211 | else |
4212 | { | |
4213 | DPRINTF (("Check: %s / %s / %s / %s", fkey, | |
4214 | metaStateInfo_unparse (minfo), | |
4215 | stateValue_unparse (fval), | |
4216 | stateValue_unparse (tval))); | |
4217 | ||
4218 | sctable = metaStateInfo_getTransferTable (minfo); | |
4219 | msg = cstring_undefined; | |
4220 | ||
4221 | nval = stateCombinationTable_lookup (sctable, | |
4222 | stateValue_getValue (fval), | |
4223 | stateValue_getValue (tval), | |
4224 | &msg); | |
4225 | ||
4226 | if (transferType == TT_DOASSIGN && sRef_isLocalVar (tref)) | |
4227 | { | |
4228 | /* Local assignments just replace state. */ | |
4229 | DPRINTF (("No transfer error assigning to local: %s", msg)); | |
4230 | stateValue_updateValueLoc (tval, stateValue_getValue (fval), loc); | |
990ec868 | 4231 | DPRINTF (("Update: %s", stateValue_unparse (tval))); |
28bf4b0b | 4232 | } |
4233 | else | |
4234 | { | |
b7e84605 | 4235 | if (nval == stateValue_error) |
28bf4b0b | 4236 | { |
4237 | /*@i32 print extra info for assignments@*/ | |
4238 | ||
4239 | if (optgenerror | |
4240 | (FLG_STATETRANSFER, | |
4241 | message | |
b7e84605 | 4242 | ("Invalid transfer from %q %x to %q%q: %q", |
2c88d156 | 4243 | stateValue_unparseValue (fval, minfo), |
28bf4b0b | 4244 | sRef_unparse (fref), |
2c88d156 | 4245 | stateValue_unparseValue (tval, minfo), |
b7e84605 | 4246 | cstring_isDefined (msg) |
4247 | ? message (" (%s)", msg) : cstring_undefined, | |
0bf5022d | 4248 | transferErrorExcerpt (transferType, fexp, texp, fcn)), |
28bf4b0b | 4249 | loc)) |
4250 | { | |
2c88d156 | 4251 | sRef_showMetaStateInfo (fref, fkey); |
b7e84605 | 4252 | sRef_showMetaStateInfo (tref, fkey); |
28bf4b0b | 4253 | } |
4254 | else | |
4255 | { | |
4256 | DPRINTF (("Suppressed transfer error: %s", msg)); | |
4257 | } | |
4258 | } | |
4259 | else | |
4260 | { | |
4261 | if (transferType == TT_FCNRETURN) | |
4262 | { | |
4263 | /* | |
4264 | ** Returning this reference from a function, mark this reference | |
4265 | ** so no lost reference errors are returned. | |
4266 | */ | |
4267 | ||
4268 | stateValue_updateValueLoc (fval, stateValue_error, loc); | |
4269 | } | |
4270 | else if (stateValue_getValue (fval) != nval) | |
4271 | { | |
4272 | stateValue_updateValueLoc (fval, nval, loc); | |
4273 | } | |
4274 | else | |
4275 | { | |
4276 | ; | |
4277 | } | |
4278 | } | |
4279 | } | |
4280 | } | |
4281 | } | |
4282 | ||
4283 | DPRINTF (("Transfer: %s %s -> %s", | |
4284 | fkey, stateValue_unparse (fval), stateValue_unparse (tval))); | |
4285 | } end_valueTable_elements ; | |
4286 | } | |
4287 | ||
4288 | /* | |
4289 | ** assigns fexp := tref or passes fexp as a parameter, or returns fexp. | |
4290 | ** | |
4291 | ** For assignments, sets alias and definition state accordingly. | |
4292 | */ | |
4293 | ||
4294 | static void | |
4295 | checkTransfer (exprNode fexp, /*@dependent@*/ sRef fref, | |
4296 | exprNode texp, /*@dependent@*/ sRef tref, | |
0bf5022d | 4297 | exprNode fcn, |
28bf4b0b | 4298 | fileloc loc, transferKind transferType) |
4299 | { | |
4300 | setCodePoint (); | |
4301 | ||
4302 | if (context_inProtectVars ()) | |
4303 | { | |
4304 | return; | |
4305 | } | |
4306 | ||
4307 | DPRINTF (("Check transfer: %s => %s", | |
4308 | sRef_unparse (fref), | |
4309 | sRef_unparse (tref))); | |
4310 | DPRINTF (("Check transfer: %s => %s", | |
4311 | exprNode_unparse (fexp), | |
4312 | exprNode_unparse (texp))); | |
4313 | ||
0bf5022d | 4314 | checkMetaStateTransfer (fexp, fref, texp, tref, fcn, |
4315 | loc, transferType); | |
28bf4b0b | 4316 | |
4317 | /* | |
4318 | ** for local references, we need to check | |
4319 | ** the transfer for all possible aliases. | |
4320 | */ | |
4321 | ||
4322 | if (sRef_isLocalVar (tref) && transferType != TT_DOASSIGN) | |
4323 | { | |
4324 | sRefSet alias = usymtab_allAliases (tref); | |
4325 | ||
4326 | sRefSet_realElements (alias, atref) | |
4327 | { | |
4328 | sRef abase = sRef_getRootBase (atref); | |
4329 | ||
4330 | if (sRef_isKnown (atref) | |
4331 | && !sRef_isLocalVar (abase) | |
4332 | && !sRef_isExternal (abase)) | |
4333 | { | |
4334 | atref = sRef_updateSref (atref); | |
4335 | ||
4336 | if (sRef_hasName (atref)) | |
4337 | { | |
4338 | if (!sRef_isNew (atref) | |
4339 | && !sRef_sameName (tref, atref)) | |
4340 | { | |
4341 | context_setAliasAnnote (atref, tref); | |
4342 | } | |
4343 | ||
4344 | checkTransferAux (fexp, fref, TRUE, | |
4345 | texp, atref, FALSE, | |
4346 | loc, transferType); | |
4347 | ||
4348 | context_clearAliasAnnote (); | |
4349 | } | |
4350 | } | |
4351 | } end_sRefSet_realElements; | |
4352 | ||
4353 | sRefSet_free (alias); | |
4354 | } | |
4355 | ||
4356 | if (sRef_isLocalVar (fref)) | |
4357 | { | |
4358 | sRefSet alias = usymtab_allAliases (fref); | |
4359 | ||
4360 | sRefSet_realElements (alias, afref) | |
4361 | { | |
4362 | sRef abase = sRef_getRootBase (afref); | |
4363 | ||
4364 | if (sRef_isKnown (afref) | |
4365 | && !sRef_isLocalVar (abase) | |
4366 | && !sRef_isExternal (abase)) | |
4367 | { | |
4368 | afref = sRef_updateSref (afref); | |
4369 | ||
4370 | if (sRef_hasName (afref)) | |
4371 | { | |
4372 | if (!sRef_isNew (afref) | |
4373 | && !sRef_sameName (afref, fref)) | |
4374 | { | |
4375 | context_setAliasAnnote (afref, fref); | |
4376 | } | |
4377 | ||
4378 | checkTransferAux (fexp, afref, FALSE, | |
4379 | texp, tref, TRUE, | |
4380 | loc, transferType); | |
4381 | ||
4382 | context_clearAliasAnnote (); | |
4383 | } | |
4384 | } | |
4385 | } end_sRefSet_realElements; | |
4386 | ||
4387 | sRefSet_free (alias); | |
4388 | } | |
4389 | ||
4390 | setCodePoint (); | |
4391 | checkTransferAux (fexp, fref, FALSE, texp, tref, FALSE, | |
4392 | loc, transferType); | |
4393 | setCodePoint (); | |
4394 | } | |
4395 | ||
4396 | static /*@exposed@*/ sRef | |
4397 | dependentReference (sRef sr) | |
4398 | { | |
4399 | sRefSet ab = usymtab_aliasedBy (sr); /* yes, really mean aliasedBy */ | |
4400 | ||
4401 | DPRINTF (("Dependent reference: %s", sRef_unparse (sr))); | |
4402 | DPRINTF (("Aliases: %s", sRefSet_unparse (ab))); | |
4403 | ||
4404 | /* | |
4405 | ** If there is a local variable that aliases sr, then there is no | |
4406 | ** error. Make the local an only. | |
4407 | */ | |
4408 | ||
4409 | if (!sRefSet_isEmpty (ab)) | |
4410 | { | |
4411 | sRef res = sRef_undefined; | |
4412 | ||
4413 | DPRINTF (("Here we are!")); | |
4414 | ||
4415 | /* | |
4416 | ** make one an only, others alias it | |
4417 | */ | |
4418 | ||
4419 | sRefSet_realElements (ab, current) | |
4420 | { | |
4421 | if (sRef_isOwned (current)) | |
4422 | { | |
4423 | res = current; | |
4424 | break; | |
4425 | } | |
4426 | } end_sRefSet_realElements; | |
4427 | ||
4428 | if (sRef_isInvalid (res)) | |
4429 | { | |
4430 | /* | |
4431 | ** evans - 2001-03-24 | |
4432 | ** No owned element, just choose one! | |
4433 | ** (Any reason for preference?) | |
4434 | */ | |
4435 | ||
4436 | res = sRefSet_choose (ab); | |
4437 | } | |
4438 | ||
4439 | sRefSet_free (ab); | |
4440 | return res; | |
4441 | } | |
4442 | ||
4443 | return sRef_undefined; | |
4444 | } | |
4445 | ||
2e127cb8 | 4446 | bool transferChecks_canLoseReference (/*@dependent@*/ sRef sr, fileloc loc) |
28bf4b0b | 4447 | { |
4448 | bool gotone = FALSE; | |
4449 | sRefSet ab = usymtab_aliasedBy (sr); /* yes, really mean aliasedBy */ | |
4450 | ||
4451 | /* | |
4452 | ** if there is a local variable that aliases sr, then there is no | |
4453 | ** error. Make the local an only. | |
4454 | */ | |
4455 | ||
4456 | if (!sRefSet_isEmpty (ab)) | |
4457 | { | |
4458 | /* | |
4459 | ** make one an only, others alias it | |
4460 | */ | |
4461 | ||
4462 | sRefSet_realElements (ab, current) | |
4463 | { | |
4464 | sRef_setLastReference (current, sr, loc); | |
4465 | gotone = TRUE; | |
4466 | break; | |
4467 | } end_sRefSet_realElements; | |
4468 | ||
4469 | sRefSet_free (ab); | |
4470 | } | |
4471 | ||
4472 | return gotone; | |
4473 | } | |
4474 | ||
4475 | bool canLoseLocalReference (/*@dependent@*/ sRef sr, fileloc loc) | |
4476 | { | |
4477 | bool gotone = FALSE; | |
4478 | sRefSet ab = usymtab_aliasedBy (sr); /* yes, really mean aliasedBy */ | |
4479 | ||
4480 | /* | |
4481 | ** if there is a local variable that aliases sr, then there is no | |
4482 | ** error. Make the local an only. | |
4483 | */ | |
4484 | ||
4485 | if (!sRefSet_isEmpty (ab)) | |
4486 | { | |
4487 | /* | |
4488 | ** make one an only, others alias it | |
4489 | */ | |
4490 | ||
4491 | sRefSet_realElements (ab, current) | |
4492 | { | |
4493 | if (sRef_isRealLocalVar (sRef_getRootBase (current))) | |
4494 | { | |
4495 | sRef_setLastReference (current, sr, loc); | |
4496 | gotone = TRUE; | |
4497 | break; | |
4498 | } | |
4499 | } end_sRefSet_realElements; | |
4500 | ||
4501 | sRefSet_free (ab); | |
4502 | } | |
4503 | ||
4504 | return gotone; | |
4505 | } |