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[32]; 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 { v->sym->val[n] = cast_val(v->sym->type, m, v->sym->nbits); 163 v->sym->setat = depth; 164 } } 165 return 1; 166 } 167 168 void 169 dumpclaims(FILE *fd, int pid, char *s) 170 { extern Lextok *Xu_List; extern int Pid; 171 extern short terse; 172 Lextok *m; int cnt = 0; int oPid = Pid; 173 174 for (m = Xu_List; m; m = m->rgt) 175 if (strcmp(m->sym->name, s) == 0) 176 { cnt=1; 177 break; 178 } 179 if (cnt == 0) return; 180 181 Pid = pid; 182 fprintf(fd, "#ifndef XUSAFE\n"); 183 for (m = Xu_List; m; m = m->rgt) 184 { if (strcmp(m->sym->name, s) != 0) 185 continue; 186 no_arrays = 1; 187 putname(fd, "\t\tsetq_claim(", m->lft, 0, ""); 188 no_arrays = 0; 189 fprintf(fd, ", %d, ", m->val); 190 terse = 1; 191 putname(fd, "\"", m->lft, 0, "\", h, "); 192 terse = 0; 193 fprintf(fd, "\"%s\");\n", s); 194 } 195 fprintf(fd, "#endif\n"); 196 Pid = oPid; 197 } 198 199 void 200 dumpglobals(void) 201 { Ordered *walk; 202 static Lextok *dummy = ZN; 203 Symbol *sp; 204 int j; 205 206 if (!dummy) 207 dummy = nn(ZN, NAME, nn(ZN,CONST,ZN,ZN), ZN); 208 209 for (walk = all_names; walk; walk = walk->next) 210 { sp = walk->entry; 211 if (!sp->type || sp->context || sp->owner 212 || sp->type == PROCTYPE || sp->type == PREDEF 213 || sp->type == CODE_FRAG || sp->type == CODE_DECL 214 || (sp->type == MTYPE && ismtype(sp->name))) 215 continue; 216 217 if (sp->type == STRUCT) 218 { dump_struct(sp, sp->name, 0); 219 continue; 220 } 221 for (j = 0; j < sp->nel; j++) 222 { int prefetch; 223 if (sp->type == CHAN) 224 { doq(sp, j, 0); 225 continue; 226 } 227 if ((verbose&4) && !(verbose&64) 228 && (sp->setat < depth 229 && jumpsteps != depth)) 230 continue; 231 dummy->sym = sp; 232 dummy->lft->val = j; 233 /* in case of cast_val warnings, do this first: */ 234 prefetch = getglobal(dummy); 235 printf("\t\t%s", sp->name); 236 if (sp->nel > 1) printf("[%d]", j); 237 printf(" = "); 238 sr_mesg(stdout, prefetch, 239 sp->type == MTYPE); 240 printf("\n"); 241 if (limited_vis && (sp->hidden&2)) 242 { int colpos; 243 Buf[0] = '\0'; 244 if (!xspin) 245 { if (columns == 2) 246 sprintf(Buf, "~G%s = ", sp->name); 247 else 248 sprintf(Buf, "%s = ", sp->name); 249 } 250 sr_buf(prefetch, sp->type == MTYPE); 251 if (sp->colnr == 0) 252 { sp->colnr = maxcolnr; 253 maxcolnr = 1+(maxcolnr%10); 254 } 255 colpos = nproc+sp->colnr-1; 256 if (columns == 2) 257 { pstext(colpos, Buf); 258 continue; 259 } 260 if (!xspin) 261 { printf("\t\t%s\n", Buf); 262 continue; 263 } 264 printf("MSC: ~G %s %s\n", sp->name, Buf); 265 printf("%3d:\tproc %3d (TRACK) line 1 \"var\" ", 266 depth, colpos); 267 printf("(state 0)\t[printf('MSC: globvar\\\\n')]\n"); 268 printf("\t\t%s", sp->name); 269 if (sp->nel > 1) printf("[%d]", j); 270 printf(" = %s\n", Buf); 271 } } } 272 } 273 274 void 275 dumplocal(RunList *r) 276 { static Lextok *dummy = ZN; 277 Symbol *z, *s; 278 int i; 279 280 if (!r) return; 281 282 s = r->symtab; 283 284 if (!dummy) 285 dummy = nn(ZN, NAME, nn(ZN,CONST,ZN,ZN), ZN); 286 287 for (z = s; z; z = z->next) 288 { if (z->type == STRUCT) 289 { dump_struct(z, z->name, r); 290 continue; 291 } 292 for (i = 0; i < z->nel; i++) 293 { if (z->type == CHAN) 294 { doq(z, i, r); 295 continue; 296 } 297 if ((verbose&4) && !(verbose&64) 298 && (z->setat < depth 299 && jumpsteps != depth)) 300 continue; 301 302 dummy->sym = z; 303 dummy->lft->val = i; 304 305 printf("\t\t%s(%d):%s", 306 r->n->name, r->pid, z->name); 307 if (z->nel > 1) printf("[%d]", i); 308 printf(" = "); 309 sr_mesg(stdout, getval(dummy), z->type == MTYPE); 310 printf("\n"); 311 if (limited_vis && (z->hidden&2)) 312 { int colpos; 313 Buf[0] = '\0'; 314 if (!xspin) 315 { if (columns == 2) 316 sprintf(Buf, "~G%s(%d):%s = ", 317 r->n->name, r->pid, z->name); 318 else 319 sprintf(Buf, "%s(%d):%s = ", 320 r->n->name, r->pid, z->name); 321 } 322 sr_buf(getval(dummy), z->type==MTYPE); 323 if (z->colnr == 0) 324 { z->colnr = maxcolnr; 325 maxcolnr = 1+(maxcolnr%10); 326 } 327 colpos = nproc+z->colnr-1; 328 if (columns == 2) 329 { pstext(colpos, Buf); 330 continue; 331 } 332 if (!xspin) 333 { printf("\t\t%s\n", Buf); 334 continue; 335 } 336 printf("MSC: ~G %s(%d):%s %s\n", 337 r->n->name, r->pid, z->name, Buf); 338 339 printf("%3d:\tproc %3d (TRACK) line 1 \"var\" ", 340 depth, colpos); 341 printf("(state 0)\t[printf('MSC: locvar\\\\n')]\n"); 342 printf("\t\t%s(%d):%s", 343 r->n->name, r->pid, z->name); 344 if (z->nel > 1) printf("[%d]", i); 345 printf(" = %s\n", Buf); 346 } } } 347 } 348