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28bf4b0b | 1 | /* |
2 | ** LCLint - annotation-assisted static program checker | |
3 | ** Copyright (C) 1994-2001 University of Virginia, | |
4 | ** Massachusetts Institute of Technology | |
5 | ** | |
6 | ** This program is free software; you can redistribute it and/or modify it | |
7 | ** under the terms of the GNU General Public License as published by the | |
8 | ** Free Software Foundation; either version 2 of the License, or (at your | |
9 | ** option) any later version. | |
10 | ** | |
11 | ** This program is distributed in the hope that it will be useful, but | |
12 | ** WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | ** General Public License for more details. | |
15 | ** | |
16 | ** The GNU General Public License is available from http://www.gnu.org/ or | |
17 | ** the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, | |
18 | ** MA 02111-1307, USA. | |
19 | ** | |
20 | ** For information on lclint: lclint-request@cs.virginia.edu | |
21 | ** To report a bug: lclint-bug@cs.virginia.edu | |
22 | ** For more information: http://lclint.cs.virginia.edu | |
23 | */ | |
24 | /* | |
25 | ** mtContextNode.c | |
26 | */ | |
27 | ||
28 | # include "lclintMacros.nf" | |
29 | # include "basic.h" | |
28bf4b0b | 30 | |
31 | static bool mtContextNode_matchesType (mtContextNode, ctype) /*@*/ ; | |
32 | ||
33 | static /*@observer@*/ cstring mtContextKind_unparse (mtContextKind ck) | |
34 | { | |
35 | switch (ck) | |
36 | { | |
37 | case MTC_ANY: return cstring_makeLiteralTemp ("any"); | |
12f2ffe9 | 38 | case MTC_PARAM: return cstring_makeLiteralTemp ("parameter"); |
b072092f | 39 | case MTC_RESULT: return cstring_makeLiteralTemp ("result"); |
28bf4b0b | 40 | case MTC_REFERENCE: return cstring_makeLiteralTemp ("reference"); |
41 | case MTC_CLAUSE: return cstring_makeLiteralTemp ("clause"); | |
12f2ffe9 | 42 | case MTC_LITERAL: return cstring_makeLiteralTemp ("literal"); |
43 | case MTC_NULL: return cstring_makeLiteralTemp ("null"); | |
28bf4b0b | 44 | } |
45 | ||
8250fa4a | 46 | BADBRANCHRET (cstring_undefined); |
28bf4b0b | 47 | } |
48 | ||
49 | static mtContextNode mtContextNode_create (mtContextKind context, ctype ct) | |
50 | { | |
51 | mtContextNode res = (mtContextNode) dmalloc (sizeof (*res)); | |
52 | res->context = context; | |
53 | res->type = ct; | |
54 | DPRINTF (("Create: %s", mtContextNode_unparse (res))); | |
55 | return res; | |
56 | } | |
57 | ||
58 | extern mtContextNode mtContextNode_createAny () | |
59 | { | |
60 | return mtContextNode_create (MTC_ANY, ctype_unknown); | |
61 | } | |
62 | ||
63 | extern mtContextNode mtContextNode_createParameter (ctype ct) | |
64 | { | |
65 | return mtContextNode_create (MTC_PARAM, ct); | |
66 | } | |
67 | ||
b072092f | 68 | extern mtContextNode mtContextNode_createResult (ctype ct) |
69 | { | |
70 | return mtContextNode_create (MTC_RESULT, ct); | |
71 | } | |
72 | ||
28bf4b0b | 73 | extern mtContextNode mtContextNode_createReference (ctype ct) |
74 | { | |
75 | return mtContextNode_create (MTC_REFERENCE, ct); | |
76 | } | |
77 | ||
78 | extern mtContextNode mtContextNode_createClause (ctype ct) | |
79 | { | |
80 | return mtContextNode_create (MTC_CLAUSE, ct); | |
81 | } | |
82 | ||
12f2ffe9 | 83 | extern mtContextNode mtContextNode_createLiteral (ctype ct) |
84 | { | |
85 | return mtContextNode_create (MTC_LITERAL, ct); | |
86 | } | |
87 | ||
88 | extern mtContextNode mtContextNode_createNull (ctype ct) | |
89 | { | |
90 | return mtContextNode_create (MTC_NULL, ct); | |
91 | } | |
92 | ||
28bf4b0b | 93 | extern void mtContextNode_free (/*@only@*/ mtContextNode node) |
94 | { | |
95 | sfree (node); | |
96 | } | |
97 | ||
98 | bool mtContextNode_matchesEntry (mtContextNode context, uentry ue) | |
99 | { | |
100 | ctype ct; | |
101 | ||
102 | llassert (mtContextNode_isDefined (context)); | |
103 | ||
104 | DPRINTF (("Matches context: %s / %s", | |
105 | mtContextNode_unparse (context), uentry_unparse (ue))); | |
106 | ||
107 | switch (context->context) | |
108 | { | |
109 | case MTC_ANY: break; /* everything matches */ | |
b072092f | 110 | case MTC_RESULT: |
111 | if (!uentry_isFunction (ue)) | |
112 | { | |
113 | return FALSE; | |
114 | } | |
115 | break; | |
28bf4b0b | 116 | case MTC_PARAM: |
6970c11b | 117 | if (!uentry_isAnyParam (ue)) |
28bf4b0b | 118 | { |
6970c11b | 119 | DPRINTF (("not param: %s", uentry_unparseFull (ue))); |
28bf4b0b | 120 | return FALSE; |
121 | } | |
122 | break; | |
12f2ffe9 | 123 | case MTC_LITERAL: |
124 | case MTC_NULL: | |
125 | return FALSE; | |
28bf4b0b | 126 | case MTC_REFERENCE: |
127 | break; | |
128 | case MTC_CLAUSE: | |
129 | BADBRANCH; | |
130 | } | |
131 | ||
132 | if (uentry_isFunction (ue)) | |
133 | { | |
134 | ct = ctype_getReturnType (uentry_getType (ue)); | |
135 | } | |
136 | else | |
137 | { | |
138 | ct = uentry_getType (ue); | |
139 | } | |
140 | ||
141 | return mtContextNode_matchesType (context, ct); | |
142 | } | |
143 | ||
144 | bool mtContextNode_matchesRef (mtContextNode context, sRef sr) | |
145 | { | |
146 | ctype ct; | |
147 | ||
148 | llassert (mtContextNode_isDefined (context)); | |
149 | ||
150 | DPRINTF (("Matches context: %s / %s", | |
151 | mtContextNode_unparse (context), sRef_unparse (sr))); | |
152 | ||
153 | switch (context->context) | |
154 | { | |
155 | case MTC_ANY: break; /* everything matches */ | |
b072092f | 156 | case MTC_RESULT: |
157 | DPRINTF (("Result? %s / %s", | |
158 | sRef_unparseFull (sr), | |
159 | bool_unparse (sRef_isResult (sr)))); | |
160 | return sRef_isResult (sr); | |
28bf4b0b | 161 | case MTC_PARAM: |
162 | if (!sRef_isParam (sr)) | |
163 | { | |
164 | return FALSE; | |
165 | } | |
166 | break; | |
12f2ffe9 | 167 | case MTC_LITERAL: |
168 | DPRINTF (("Literal: %s", sRef_unparse (sr))); | |
169 | if (!sRef_isConst (sr)) | |
170 | { | |
171 | return FALSE; | |
172 | } | |
173 | break; | |
174 | case MTC_NULL: | |
28bf4b0b | 175 | case MTC_REFERENCE: |
176 | break; | |
177 | case MTC_CLAUSE: | |
178 | BADBRANCH; | |
179 | } | |
180 | ||
181 | ct = sRef_getType (sr); | |
182 | return mtContextNode_matchesType (context, ct); | |
183 | } | |
184 | ||
185 | bool mtContextNode_matchesRefStrict (mtContextNode context, sRef s) | |
186 | { | |
187 | if (mtContextNode_matchesRef (context, s)) | |
188 | { | |
189 | if (ctype_isKnown (context->type) | |
190 | && (ctype_isUnknown (sRef_getType (s)) | |
191 | || ctype_isVoidPointer (sRef_getType (s)))) | |
192 | { | |
193 | return FALSE; | |
194 | } | |
195 | else | |
196 | { | |
197 | return TRUE; | |
198 | } | |
199 | } | |
200 | ||
201 | return FALSE; | |
202 | } | |
203 | ||
204 | bool mtContextNode_matchesType (mtContextNode context, ctype ct) | |
205 | { | |
206 | DPRINTF (("Context type...")); | |
207 | ||
208 | if (!ctype_match (context->type, ct)) | |
209 | { | |
210 | DPRINTF (("Type mismatch: %s / %s", | |
211 | ctype_unparse (context->type), | |
212 | ctype_unparse (ct))); | |
213 | return FALSE; | |
214 | } | |
215 | else | |
216 | { | |
b7e84605 | 217 | /* evans 2001-08-21 - don't match if only one type is unknown */ |
218 | if (ctype_isUnknown (ct) && !ctype_isUnknown (context->type)) | |
219 | { | |
220 | return FALSE; | |
221 | } | |
222 | ||
28bf4b0b | 223 | DPRINTF (("Type okay: %s / %s", |
224 | ctype_unparse (context->type), | |
225 | ctype_unparse (ct))); | |
226 | } | |
227 | ||
228 | return TRUE; | |
229 | } | |
230 | ||
231 | cstring mtContextNode_unparse (mtContextNode node) | |
232 | { | |
233 | if (ctype_isKnown (node->type)) | |
234 | { | |
235 | return message ("%s %s", mtContextKind_unparse (node->context), | |
236 | ctype_unparse (node->type)); | |
237 | } | |
238 | else | |
239 | { | |
240 | return message ("%s", mtContextKind_unparse (node->context)); | |
241 | } | |
242 | } | |
243 | ||
244 | bool mtContextNode_isClause (mtContextNode n) | |
245 | { | |
246 | llassert (mtContextNode_isDefined (n)); | |
247 | return (n->context == MTC_CLAUSE); | |
248 | } | |
249 | ||
250 | bool mtContextNode_isParameter (mtContextNode n) | |
251 | { | |
252 | llassert (mtContextNode_isDefined (n)); | |
253 | return (n->context == MTC_PARAM); | |
254 | } | |
255 | ||
b072092f | 256 | bool mtContextNode_isReference (mtContextNode n) |
28bf4b0b | 257 | { |
258 | llassert (mtContextNode_isDefined (n)); | |
259 | return (n->context == MTC_REFERENCE); | |
260 | } | |
261 | ||
b072092f | 262 | bool mtContextNode_isResult (mtContextNode n) |
263 | { | |
264 | llassert (mtContextNode_isDefined (n)); | |
265 | return (n->context == MTC_RESULT); | |
266 | } | |
267 | ||
12f2ffe9 | 268 | bool mtContextNode_isLiteral (mtContextNode n) |
269 | { | |
270 | llassert (mtContextNode_isDefined (n)); | |
271 | return (n->context == MTC_LITERAL); | |
272 | } | |
273 | ||
274 | bool mtContextNode_isNull (mtContextNode n) | |
275 | { | |
276 | llassert (mtContextNode_isDefined (n)); | |
277 | return (n->context == MTC_NULL); | |
278 | } | |
279 | ||
b7e84605 | 280 | void mtContextNode_showRefError (mtContextNode context, sRef sr) |
281 | { | |
282 | ctype ct; | |
283 | ||
284 | llassert (mtContextNode_isDefined (context)); | |
285 | llassert (!mtContextNode_matchesRef (context, sr)); | |
286 | ||
287 | DPRINTF (("Matches context: %s / %s", | |
288 | mtContextNode_unparse (context), sRef_unparse (sr))); | |
289 | ||
290 | switch (context->context) | |
291 | { | |
292 | case MTC_ANY: break; /* everything matches */ | |
293 | case MTC_RESULT: | |
294 | if (!sRef_isResult (sr)) | |
295 | { | |
296 | llgenindentmsgnoloc | |
297 | (message ("Context is result, doesn't match %q", sRef_unparse (sr))); | |
298 | return; | |
299 | } | |
300 | break; | |
301 | case MTC_PARAM: | |
302 | if (!sRef_isResult (sr)) | |
303 | { | |
304 | llgenindentmsgnoloc | |
305 | (message ("Context is parameter, doesn't match %q", sRef_unparse (sr))); | |
306 | return; | |
307 | } | |
308 | break; | |
309 | case MTC_LITERAL: | |
310 | DPRINTF (("Literal: %s", sRef_unparse (sr))); | |
311 | if (!sRef_isConst (sr)) | |
312 | { | |
313 | llgenindentmsgnoloc | |
314 | (message ("Context is literal, doesn't match %q", sRef_unparse (sr))); | |
315 | return; | |
316 | } | |
317 | break; | |
318 | case MTC_NULL: | |
319 | case MTC_REFERENCE: | |
320 | break; | |
321 | case MTC_CLAUSE: | |
322 | BADBRANCH; | |
323 | } | |
324 | ||
325 | ct = sRef_getType (sr); | |
326 | ||
327 | if (!mtContextNode_matchesType (context, ct)) | |
328 | { | |
329 | llgenindentmsgnoloc | |
330 | (message ("Context type is %s, doesn't match type %s", | |
331 | ctype_unparse (context->type), | |
332 | ctype_unparse (ct))); | |
333 | } | |
334 | else | |
335 | { | |
336 | BADBRANCH; | |
337 | } | |
338 | } | |
28bf4b0b | 339 | |
340 | ||
341 |