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 #ifdef PC 14 #include "y_tab.h" 15 #else 16 #include "y.tab.h" 17 #endif 18 19 extern Ordered *all_names; 20 extern RunList *X, *LastX; 21 extern Symbol *Fname; 22 extern char Buf[]; 23 extern int lineno, depth, verbose, xspin, limited_vis; 24 extern int analyze, jumpsteps, nproc, nstop, columns; 25 extern short no_arrays, Have_claim; 26 extern void sr_mesg(FILE *, int, int); 27 extern void sr_buf(int, int); 28 29 static int getglobal(Lextok *); 30 static int setglobal(Lextok *, int); 31 static int maxcolnr = 1; 32 33 int 34 getval(Lextok *sn) 35 { Symbol *s = sn->sym; 36 37 if (strcmp(s->name, "_") == 0) 38 { non_fatal("attempt to read value of '_'", 0); 39 return 0; 40 } 41 if (strcmp(s->name, "_last") == 0) 42 return (LastX)?LastX->pid:0; 43 if (strcmp(s->name, "_p") == 0) 44 return (X && X->pc)?X->pc->seqno:0; 45 if (strcmp(s->name, "_pid") == 0) 46 { if (!X) return 0; 47 return X->pid - Have_claim; 48 } 49 if (strcmp(s->name, "_nr_pr") == 0) 50 return nproc-nstop; /* new 3.3.10 */ 51 52 if (s->context && s->type) 53 return getlocal(sn); 54 55 if (!s->type) /* not declared locally */ 56 { s = lookup(s->name); /* try global */ 57 sn->sym = s; /* fix it */ 58 } 59 return getglobal(sn); 60 } 61 62 int 63 setval(Lextok *v, int n) 64 { 65 if (v->sym->context && v->sym->type) 66 return setlocal(v, n); 67 if (!v->sym->type) 68 v->sym = lookup(v->sym->name); 69 return setglobal(v, n); 70 } 71 72 void 73 rm_selfrefs(Symbol *s, Lextok *i) 74 { 75 if (!i) return; 76 77 if (i->ntyp == NAME 78 && strcmp(i->sym->name, s->name) == 0 79 && ( (!i->sym->context && !s->context) 80 || ( i->sym->context && s->context 81 && strcmp(i->sym->context->name, s->context->name) == 0))) 82 { lineno = i->ln; 83 Fname = i->fn; 84 non_fatal("self-reference initializing '%s'", s->name); 85 i->ntyp = CONST; 86 i->val = 0; 87 } else 88 { rm_selfrefs(s, i->lft); 89 rm_selfrefs(s, i->rgt); 90 } 91 } 92 93 int 94 checkvar(Symbol *s, int n) 95 { int i, oln = lineno; /* calls on eval() change it */ 96 Symbol *ofnm = Fname; 97 98 if (!in_bound(s, n)) 99 return 0; 100 101 if (s->type == 0) 102 { non_fatal("undecl var %s (assuming int)", s->name); 103 s->type = INT; 104 } 105 /* not a STRUCT */ 106 if (s->val == (int *) 0) /* uninitialized */ 107 { s->val = (int *) emalloc(s->nel*sizeof(int)); 108 for (i = 0; i < s->nel; i++) 109 { if (s->type != CHAN) 110 { rm_selfrefs(s, s->ini); 111 s->val[i] = eval(s->ini); 112 } else if (!analyze) 113 s->val[i] = qmake(s); 114 } } 115 lineno = oln; 116 Fname = ofnm; 117 return 1; 118 } 119 120 static int 121 getglobal(Lextok *sn) 122 { Symbol *s = sn->sym; 123 int i, n = eval(sn->lft); 124 125 if (s->type == 0 && X && (i = find_lab(s, X->n, 0))) 126 { printf("findlab through getglobal on %s\n", s->name); 127 return i; /* can this happen? */ 128 } 129 if (s->type == STRUCT) 130 return Rval_struct(sn, s, 1); /* 1 = check init */ 131 if (checkvar(s, n)) 132 return cast_val(s->type, s->val[n], s->nbits); 133 return 0; 134 } 135 136 int 137 cast_val(int t, int v, int w) 138 { int i=0; short s=0; unsigned int u=0; 139 140 if (t == PREDEF || t == INT || t == CHAN) i = v; /* predef means _ */ 141 else if (t == SHORT) s = (short) v; 142 else if (t == BYTE || t == MTYPE) u = (unsigned char)v; 143 else if (t == BIT) u = (unsigned char)(v&1); 144 else if (t == UNSIGNED) 145 { if (w == 0) 146 fatal("cannot happen, cast_val", (char *)0); 147 /* u = (unsigned)(v& ((1<<w)-1)); problem when w=32 */ 148 u = (unsigned)(v& (~0u>>(8*sizeof(unsigned)-w))); /* doug */ 149 } 150 151 if (v != i+s+ (int) u) 152 { char buf[32]; sprintf(buf, "%d->%d (%d)", v, i+s+u, t); 153 non_fatal("value (%s) truncated in assignment", buf); 154 } 155 return (int)(i+s+u); 156 } 157 158 static int 159 setglobal(Lextok *v, int m) 160 { 161 if (v->sym->type == STRUCT) 162 (void) Lval_struct(v, v->sym, 1, m); 163 else 164 { int n = eval(v->lft); 165 if (checkvar(v->sym, n)) 166 { v->sym->val[n] = cast_val(v->sym->type, m, v->sym->nbits); 167 v->sym->setat = depth; 168 } } 169 return 1; 170 } 171 172 void 173 dumpclaims(FILE *fd, int pid, char *s) 174 { extern Lextok *Xu_List; extern int Pid; 175 extern short terse; 176 Lextok *m; int cnt = 0; int oPid = Pid; 177 178 for (m = Xu_List; m; m = m->rgt) 179 if (strcmp(m->sym->name, s) == 0) 180 { cnt=1; 181 break; 182 } 183 if (cnt == 0) return; 184 185 Pid = pid; 186 fprintf(fd, "#ifndef XUSAFE\n"); 187 for (m = Xu_List; m; m = m->rgt) 188 { if (strcmp(m->sym->name, s) != 0) 189 continue; 190 no_arrays = 1; 191 putname(fd, "\t\tsetq_claim(", m->lft, 0, ""); 192 no_arrays = 0; 193 fprintf(fd, ", %d, ", m->val); 194 terse = 1; 195 putname(fd, "\"", m->lft, 0, "\", h, "); 196 terse = 0; 197 fprintf(fd, "\"%s\");\n", s); 198 } 199 fprintf(fd, "#endif\n"); 200 Pid = oPid; 201 } 202 203 void 204 dumpglobals(void) 205 { Ordered *walk; 206 static Lextok *dummy = ZN; 207 Symbol *sp; 208 int j; 209 210 if (!dummy) 211 dummy = nn(ZN, NAME, nn(ZN,CONST,ZN,ZN), ZN); 212 213 for (walk = all_names; walk; walk = walk->next) 214 { sp = walk->entry; 215 if (!sp->type || sp->context || sp->owner 216 || sp->type == PROCTYPE || sp->type == PREDEF 217 || sp->type == CODE_FRAG || sp->type == CODE_DECL 218 || (sp->type == MTYPE && ismtype(sp->name))) 219 continue; 220 221 if (sp->type == STRUCT) 222 { dump_struct(sp, sp->name, 0); 223 continue; 224 } 225 for (j = 0; j < sp->nel; j++) 226 { int prefetch; 227 if (sp->type == CHAN) 228 { doq(sp, j, 0); 229 continue; 230 } 231 if ((verbose&4) && !(verbose&64) 232 && (sp->setat < depth 233 && jumpsteps != depth)) 234 continue; 235 dummy->sym = sp; 236 dummy->lft->val = j; 237 /* in case of cast_val warnings, do this first: */ 238 prefetch = getglobal(dummy); 239 printf("\t\t%s", sp->name); 240 if (sp->nel > 1) printf("[%d]", j); 241 printf(" = "); 242 sr_mesg(stdout, prefetch, 243 sp->type == MTYPE); 244 printf("\n"); 245 if (limited_vis && (sp->hidden&2)) 246 { int colpos; 247 Buf[0] = '\0'; 248 if (!xspin) 249 { if (columns == 2) 250 sprintf(Buf, "~G%s = ", sp->name); 251 else 252 sprintf(Buf, "%s = ", sp->name); 253 } 254 sr_buf(prefetch, sp->type == MTYPE); 255 if (sp->colnr == 0) 256 { sp->colnr = maxcolnr; 257 maxcolnr = 1+(maxcolnr%10); 258 } 259 colpos = nproc+sp->colnr-1; 260 if (columns == 2) 261 { pstext(colpos, Buf); 262 continue; 263 } 264 if (!xspin) 265 { printf("\t\t%s\n", Buf); 266 continue; 267 } 268 printf("MSC: ~G %s %s\n", sp->name, Buf); 269 printf("%3d:\tproc %3d (TRACK) line 1 \"var\" ", 270 depth, colpos); 271 printf("(state 0)\t[printf('MSC: globvar\\\\n')]\n"); 272 printf("\t\t%s", sp->name); 273 if (sp->nel > 1) printf("[%d]", j); 274 printf(" = %s\n", Buf); 275 } } } 276 } 277 278 void 279 dumplocal(RunList *r) 280 { static Lextok *dummy = ZN; 281 Symbol *z, *s = r->symtab; 282 int i; 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