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[lttv.git] / verif / Spin / Src5.1.6 / vars.c
1 /***** spin: vars.c *****/
2
3 /* Copyright (c) 1989-2003 by Lucent Technologies, Bell Laboratories. */
4 /* All Rights Reserved. This software is for educational purposes only. */
5 /* No guarantee whatsoever is expressed or implied by the distribution of */
6 /* this code. Permission is given to distribute this code provided that */
7 /* this introductory message is not removed and no monies are exchanged. */
8 /* Software written by Gerard J. Holzmann. For tool documentation see: */
9 /* http://spinroot.com/ */
10 /* Send all bug-reports and/or questions to: bugs@spinroot.com */
11
12 #include "spin.h"
13 #include "y.tab.h"
14
15 extern Ordered *all_names;
16 extern RunList *X, *LastX;
17 extern Symbol *Fname;
18 extern char Buf[];
19 extern int lineno, depth, verbose, xspin, limited_vis;
20 extern int analyze, jumpsteps, nproc, nstop, columns;
21 extern short no_arrays, Have_claim;
22 extern void sr_mesg(FILE *, int, int);
23 extern void sr_buf(int, int);
24
25 static int getglobal(Lextok *);
26 static int setglobal(Lextok *, int);
27 static int maxcolnr = 1;
28
29 int
30 getval(Lextok *sn)
31 { Symbol *s = sn->sym;
32
33 if (strcmp(s->name, "_") == 0)
34 { non_fatal("attempt to read value of '_'", 0);
35 return 0;
36 }
37 if (strcmp(s->name, "_last") == 0)
38 return (LastX)?LastX->pid:0;
39 if (strcmp(s->name, "_p") == 0)
40 return (X && X->pc)?X->pc->seqno:0;
41 if (strcmp(s->name, "_pid") == 0)
42 { if (!X) return 0;
43 return X->pid - Have_claim;
44 }
45 if (strcmp(s->name, "_nr_pr") == 0)
46 return nproc-nstop; /* new 3.3.10 */
47
48 if (s->context && s->type)
49 return getlocal(sn);
50
51 if (!s->type) /* not declared locally */
52 { s = lookup(s->name); /* try global */
53 sn->sym = s; /* fix it */
54 }
55 return getglobal(sn);
56 }
57
58 int
59 setval(Lextok *v, int n)
60 {
61 if (v->sym->context && v->sym->type)
62 return setlocal(v, n);
63 if (!v->sym->type)
64 v->sym = lookup(v->sym->name);
65 return setglobal(v, n);
66 }
67
68 void
69 rm_selfrefs(Symbol *s, Lextok *i)
70 {
71 if (!i) return;
72
73 if (i->ntyp == NAME
74 && strcmp(i->sym->name, s->name) == 0
75 && ( (!i->sym->context && !s->context)
76 || ( i->sym->context && s->context
77 && strcmp(i->sym->context->name, s->context->name) == 0)))
78 { lineno = i->ln;
79 Fname = i->fn;
80 non_fatal("self-reference initializing '%s'", s->name);
81 i->ntyp = CONST;
82 i->val = 0;
83 } else
84 { rm_selfrefs(s, i->lft);
85 rm_selfrefs(s, i->rgt);
86 }
87 }
88
89 int
90 checkvar(Symbol *s, int n)
91 { int i, oln = lineno; /* calls on eval() change it */
92 Symbol *ofnm = Fname;
93
94 if (!in_bound(s, n))
95 return 0;
96
97 if (s->type == 0)
98 { non_fatal("undecl var %s (assuming int)", s->name);
99 s->type = INT;
100 }
101 /* not a STRUCT */
102 if (s->val == (int *) 0) /* uninitialized */
103 { s->val = (int *) emalloc(s->nel*sizeof(int));
104 for (i = 0; i < s->nel; i++)
105 { if (s->type != CHAN)
106 { rm_selfrefs(s, s->ini);
107 s->val[i] = eval(s->ini);
108 } else if (!analyze)
109 s->val[i] = qmake(s);
110 } }
111 lineno = oln;
112 Fname = ofnm;
113 return 1;
114 }
115
116 static int
117 getglobal(Lextok *sn)
118 { Symbol *s = sn->sym;
119 int i, n = eval(sn->lft);
120
121 if (s->type == 0 && X && (i = find_lab(s, X->n, 0)))
122 { printf("findlab through getglobal on %s\n", s->name);
123 return i; /* can this happen? */
124 }
125 if (s->type == STRUCT)
126 return Rval_struct(sn, s, 1); /* 1 = check init */
127 if (checkvar(s, n))
128 return cast_val(s->type, s->val[n], s->nbits);
129 return 0;
130 }
131
132 int
133 cast_val(int t, int v, int w)
134 { int i=0; short s=0; unsigned int u=0;
135
136 if (t == PREDEF || t == INT || t == CHAN) i = v; /* predef means _ */
137 else if (t == SHORT) s = (short) v;
138 else if (t == BYTE || t == MTYPE) u = (unsigned char)v;
139 else if (t == BIT) u = (unsigned char)(v&1);
140 else if (t == UNSIGNED)
141 { if (w == 0)
142 fatal("cannot happen, cast_val", (char *)0);
143 /* u = (unsigned)(v& ((1<<w)-1)); problem when w=32 */
144 u = (unsigned)(v& (~0u>>(8*sizeof(unsigned)-w))); /* doug */
145 }
146
147 if (v != i+s+ (int) u)
148 { char buf[64]; sprintf(buf, "%d->%d (%d)", v, i+s+u, t);
149 non_fatal("value (%s) truncated in assignment", buf);
150 }
151 return (int)(i+s+u);
152 }
153
154 static int
155 setglobal(Lextok *v, int m)
156 {
157 if (v->sym->type == STRUCT)
158 (void) Lval_struct(v, v->sym, 1, m);
159 else
160 { int n = eval(v->lft);
161 if (checkvar(v->sym, n))
162 { int oval = v->sym->val[n];
163 int nval = cast_val(v->sym->type, m, v->sym->nbits);
164 v->sym->val[n] = nval;
165 if (oval != nval)
166 { v->sym->setat = depth;
167 } } }
168 return 1;
169 }
170
171 void
172 dumpclaims(FILE *fd, int pid, char *s)
173 { extern Lextok *Xu_List; extern int Pid;
174 extern short terse;
175 Lextok *m; int cnt = 0; int oPid = Pid;
176
177 for (m = Xu_List; m; m = m->rgt)
178 if (strcmp(m->sym->name, s) == 0)
179 { cnt=1;
180 break;
181 }
182 if (cnt == 0) return;
183
184 Pid = pid;
185 fprintf(fd, "#ifndef XUSAFE\n");
186 for (m = Xu_List; m; m = m->rgt)
187 { if (strcmp(m->sym->name, s) != 0)
188 continue;
189 no_arrays = 1;
190 putname(fd, "\t\tsetq_claim(", m->lft, 0, "");
191 no_arrays = 0;
192 fprintf(fd, ", %d, ", m->val);
193 terse = 1;
194 putname(fd, "\"", m->lft, 0, "\", h, ");
195 terse = 0;
196 fprintf(fd, "\"%s\");\n", s);
197 }
198 fprintf(fd, "#endif\n");
199 Pid = oPid;
200 }
201
202 void
203 dumpglobals(void)
204 { Ordered *walk;
205 static Lextok *dummy = ZN;
206 Symbol *sp;
207 int j;
208
209 if (!dummy)
210 dummy = nn(ZN, NAME, nn(ZN,CONST,ZN,ZN), ZN);
211
212 for (walk = all_names; walk; walk = walk->next)
213 { sp = walk->entry;
214 if (!sp->type || sp->context || sp->owner
215 || sp->type == PROCTYPE || sp->type == PREDEF
216 || sp->type == CODE_FRAG || sp->type == CODE_DECL
217 || (sp->type == MTYPE && ismtype(sp->name)))
218 continue;
219
220 if (sp->type == STRUCT)
221 { if ((verbose&4) && !(verbose&64)
222 && (sp->setat < depth
223 && jumpsteps != depth))
224 { continue;
225 }
226 dump_struct(sp, sp->name, 0);
227 continue;
228 }
229 for (j = 0; j < sp->nel; j++)
230 { int prefetch;
231 if (sp->type == CHAN)
232 { doq(sp, j, 0);
233 continue;
234 }
235 if ((verbose&4) && !(verbose&64)
236 && (sp->setat < depth
237 && jumpsteps != depth))
238 { continue;
239 }
240
241 dummy->sym = sp;
242 dummy->lft->val = j;
243 /* in case of cast_val warnings, do this first: */
244 prefetch = getglobal(dummy);
245 printf("\t\t%s", sp->name);
246 if (sp->nel > 1) printf("[%d]", j);
247 printf(" = ");
248 sr_mesg(stdout, prefetch,
249 sp->type == MTYPE);
250 printf("\n");
251 if (limited_vis && (sp->hidden&2))
252 { int colpos;
253 Buf[0] = '\0';
254 if (!xspin)
255 { if (columns == 2)
256 sprintf(Buf, "~G%s = ", sp->name);
257 else
258 sprintf(Buf, "%s = ", sp->name);
259 }
260 sr_buf(prefetch, sp->type == MTYPE);
261 if (sp->colnr == 0)
262 { sp->colnr = maxcolnr;
263 maxcolnr = 1+(maxcolnr%10);
264 }
265 colpos = nproc+sp->colnr-1;
266 if (columns == 2)
267 { pstext(colpos, Buf);
268 continue;
269 }
270 if (!xspin)
271 { printf("\t\t%s\n", Buf);
272 continue;
273 }
274 printf("MSC: ~G %s %s\n", sp->name, Buf);
275 printf("%3d:\tproc %3d (TRACK) line 1 \"var\" ",
276 depth, colpos);
277 printf("(state 0)\t[printf('MSC: globvar\\\\n')]\n");
278 printf("\t\t%s", sp->name);
279 if (sp->nel > 1) printf("[%d]", j);
280 printf(" = %s\n", Buf);
281 } } }
282 }
283
284 void
285 dumplocal(RunList *r)
286 { static Lextok *dummy = ZN;
287 Symbol *z, *s;
288 int i;
289
290 if (!r) return;
291
292 s = r->symtab;
293
294 if (!dummy)
295 dummy = nn(ZN, NAME, nn(ZN,CONST,ZN,ZN), ZN);
296
297 for (z = s; z; z = z->next)
298 { if (z->type == STRUCT)
299 { dump_struct(z, z->name, r);
300 continue;
301 }
302 for (i = 0; i < z->nel; i++)
303 { if (z->type == CHAN)
304 { doq(z, i, r);
305 continue;
306 }
307 if ((verbose&4) && !(verbose&64)
308 && (z->setat < depth
309 && jumpsteps != depth))
310 continue;
311
312 dummy->sym = z;
313 dummy->lft->val = i;
314
315 printf("\t\t%s(%d):%s",
316 r->n->name, r->pid, z->name);
317 if (z->nel > 1) printf("[%d]", i);
318 printf(" = ");
319 sr_mesg(stdout, getval(dummy), z->type == MTYPE);
320 printf("\n");
321 if (limited_vis && (z->hidden&2))
322 { int colpos;
323 Buf[0] = '\0';
324 if (!xspin)
325 { if (columns == 2)
326 sprintf(Buf, "~G%s(%d):%s = ",
327 r->n->name, r->pid, z->name);
328 else
329 sprintf(Buf, "%s(%d):%s = ",
330 r->n->name, r->pid, z->name);
331 }
332 sr_buf(getval(dummy), z->type==MTYPE);
333 if (z->colnr == 0)
334 { z->colnr = maxcolnr;
335 maxcolnr = 1+(maxcolnr%10);
336 }
337 colpos = nproc+z->colnr-1;
338 if (columns == 2)
339 { pstext(colpos, Buf);
340 continue;
341 }
342 if (!xspin)
343 { printf("\t\t%s\n", Buf);
344 continue;
345 }
346 printf("MSC: ~G %s(%d):%s %s\n",
347 r->n->name, r->pid, z->name, Buf);
348
349 printf("%3d:\tproc %3d (TRACK) line 1 \"var\" ",
350 depth, colpos);
351 printf("(state 0)\t[printf('MSC: locvar\\\\n')]\n");
352 printf("\t\t%s(%d):%s",
353 r->n->name, r->pid, z->name);
354 if (z->nel > 1) printf("[%d]", i);
355 printf(" = %s\n", Buf);
356 } } }
357 }
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