--- /dev/null
+/***** spin: vars.c *****/
+
+/* Copyright (c) 1989-2003 by Lucent Technologies, Bell Laboratories. */
+/* All Rights Reserved. This software is for educational purposes only. */
+/* No guarantee whatsoever is expressed or implied by the distribution of */
+/* this code. Permission is given to distribute this code provided that */
+/* this introductory message is not removed and no monies are exchanged. */
+/* Software written by Gerard J. Holzmann. For tool documentation see: */
+/* http://spinroot.com/ */
+/* Send all bug-reports and/or questions to: bugs@spinroot.com */
+
+#include "spin.h"
+#include "y.tab.h"
+
+extern Ordered *all_names;
+extern RunList *X, *LastX;
+extern Symbol *Fname;
+extern char Buf[];
+extern int lineno, depth, verbose, xspin, limited_vis;
+extern int analyze, jumpsteps, nproc, nstop, columns;
+extern short no_arrays, Have_claim;
+extern void sr_mesg(FILE *, int, int);
+extern void sr_buf(int, int);
+
+static int getglobal(Lextok *);
+static int setglobal(Lextok *, int);
+static int maxcolnr = 1;
+
+int
+getval(Lextok *sn)
+{ Symbol *s = sn->sym;
+
+ if (strcmp(s->name, "_") == 0)
+ { non_fatal("attempt to read value of '_'", 0);
+ return 0;
+ }
+ if (strcmp(s->name, "_last") == 0)
+ return (LastX)?LastX->pid:0;
+ if (strcmp(s->name, "_p") == 0)
+ return (X && X->pc)?X->pc->seqno:0;
+ if (strcmp(s->name, "_pid") == 0)
+ { if (!X) return 0;
+ return X->pid - Have_claim;
+ }
+ if (strcmp(s->name, "_nr_pr") == 0)
+ return nproc-nstop; /* new 3.3.10 */
+
+ if (s->context && s->type)
+ return getlocal(sn);
+
+ if (!s->type) /* not declared locally */
+ { s = lookup(s->name); /* try global */
+ sn->sym = s; /* fix it */
+ }
+ return getglobal(sn);
+}
+
+int
+setval(Lextok *v, int n)
+{
+ if (v->sym->context && v->sym->type)
+ return setlocal(v, n);
+ if (!v->sym->type)
+ v->sym = lookup(v->sym->name);
+ return setglobal(v, n);
+}
+
+void
+rm_selfrefs(Symbol *s, Lextok *i)
+{
+ if (!i) return;
+
+ if (i->ntyp == NAME
+ && strcmp(i->sym->name, s->name) == 0
+ && ( (!i->sym->context && !s->context)
+ || ( i->sym->context && s->context
+ && strcmp(i->sym->context->name, s->context->name) == 0)))
+ { lineno = i->ln;
+ Fname = i->fn;
+ non_fatal("self-reference initializing '%s'", s->name);
+ i->ntyp = CONST;
+ i->val = 0;
+ } else
+ { rm_selfrefs(s, i->lft);
+ rm_selfrefs(s, i->rgt);
+ }
+}
+
+int
+checkvar(Symbol *s, int n)
+{ int i, oln = lineno; /* calls on eval() change it */
+ Symbol *ofnm = Fname;
+
+ if (!in_bound(s, n))
+ return 0;
+
+ if (s->type == 0)
+ { non_fatal("undecl var %s (assuming int)", s->name);
+ s->type = INT;
+ }
+ /* not a STRUCT */
+ if (s->val == (int *) 0) /* uninitialized */
+ { s->val = (int *) emalloc(s->nel*sizeof(int));
+ for (i = 0; i < s->nel; i++)
+ { if (s->type != CHAN)
+ { rm_selfrefs(s, s->ini);
+ s->val[i] = eval(s->ini);
+ } else if (!analyze)
+ s->val[i] = qmake(s);
+ } }
+ lineno = oln;
+ Fname = ofnm;
+ return 1;
+}
+
+static int
+getglobal(Lextok *sn)
+{ Symbol *s = sn->sym;
+ int i, n = eval(sn->lft);
+
+ if (s->type == 0 && X && (i = find_lab(s, X->n, 0)))
+ { printf("findlab through getglobal on %s\n", s->name);
+ return i; /* can this happen? */
+ }
+ if (s->type == STRUCT)
+ return Rval_struct(sn, s, 1); /* 1 = check init */
+ if (checkvar(s, n))
+ return cast_val(s->type, s->val[n], s->nbits);
+ return 0;
+}
+
+int
+cast_val(int t, int v, int w)
+{ int i=0; short s=0; unsigned int u=0;
+
+ if (t == PREDEF || t == INT || t == CHAN) i = v; /* predef means _ */
+ else if (t == SHORT) s = (short) v;
+ else if (t == BYTE || t == MTYPE) u = (unsigned char)v;
+ else if (t == BIT) u = (unsigned char)(v&1);
+ else if (t == UNSIGNED)
+ { if (w == 0)
+ fatal("cannot happen, cast_val", (char *)0);
+ /* u = (unsigned)(v& ((1<<w)-1)); problem when w=32 */
+ u = (unsigned)(v& (~0u>>(8*sizeof(unsigned)-w))); /* doug */
+ }
+
+ if (v != i+s+ (int) u)
+ { char buf[64]; sprintf(buf, "%d->%d (%d)", v, i+s+u, t);
+ non_fatal("value (%s) truncated in assignment", buf);
+ }
+ return (int)(i+s+u);
+}
+
+static int
+setglobal(Lextok *v, int m)
+{
+ if (v->sym->type == STRUCT)
+ (void) Lval_struct(v, v->sym, 1, m);
+ else
+ { int n = eval(v->lft);
+ if (checkvar(v->sym, n))
+ { int oval = v->sym->val[n];
+ int nval = cast_val(v->sym->type, m, v->sym->nbits);
+ v->sym->val[n] = nval;
+ if (oval != nval)
+ { v->sym->setat = depth;
+ } } }
+ return 1;
+}
+
+void
+dumpclaims(FILE *fd, int pid, char *s)
+{ extern Lextok *Xu_List; extern int Pid;
+ extern short terse;
+ Lextok *m; int cnt = 0; int oPid = Pid;
+
+ for (m = Xu_List; m; m = m->rgt)
+ if (strcmp(m->sym->name, s) == 0)
+ { cnt=1;
+ break;
+ }
+ if (cnt == 0) return;
+
+ Pid = pid;
+ fprintf(fd, "#ifndef XUSAFE\n");
+ for (m = Xu_List; m; m = m->rgt)
+ { if (strcmp(m->sym->name, s) != 0)
+ continue;
+ no_arrays = 1;
+ putname(fd, "\t\tsetq_claim(", m->lft, 0, "");
+ no_arrays = 0;
+ fprintf(fd, ", %d, ", m->val);
+ terse = 1;
+ putname(fd, "\"", m->lft, 0, "\", h, ");
+ terse = 0;
+ fprintf(fd, "\"%s\");\n", s);
+ }
+ fprintf(fd, "#endif\n");
+ Pid = oPid;
+}
+
+void
+dumpglobals(void)
+{ Ordered *walk;
+ static Lextok *dummy = ZN;
+ Symbol *sp;
+ int j;
+
+ if (!dummy)
+ dummy = nn(ZN, NAME, nn(ZN,CONST,ZN,ZN), ZN);
+
+ for (walk = all_names; walk; walk = walk->next)
+ { sp = walk->entry;
+ if (!sp->type || sp->context || sp->owner
+ || sp->type == PROCTYPE || sp->type == PREDEF
+ || sp->type == CODE_FRAG || sp->type == CODE_DECL
+ || (sp->type == MTYPE && ismtype(sp->name)))
+ continue;
+
+ if (sp->type == STRUCT)
+ { if ((verbose&4) && !(verbose&64)
+ && (sp->setat < depth
+ && jumpsteps != depth))
+ { continue;
+ }
+ dump_struct(sp, sp->name, 0);
+ continue;
+ }
+ for (j = 0; j < sp->nel; j++)
+ { int prefetch;
+ if (sp->type == CHAN)
+ { doq(sp, j, 0);
+ continue;
+ }
+ if ((verbose&4) && !(verbose&64)
+ && (sp->setat < depth
+ && jumpsteps != depth))
+ { continue;
+ }
+
+ dummy->sym = sp;
+ dummy->lft->val = j;
+ /* in case of cast_val warnings, do this first: */
+ prefetch = getglobal(dummy);
+ printf("\t\t%s", sp->name);
+ if (sp->nel > 1) printf("[%d]", j);
+ printf(" = ");
+ sr_mesg(stdout, prefetch,
+ sp->type == MTYPE);
+ printf("\n");
+ if (limited_vis && (sp->hidden&2))
+ { int colpos;
+ Buf[0] = '\0';
+ if (!xspin)
+ { if (columns == 2)
+ sprintf(Buf, "~G%s = ", sp->name);
+ else
+ sprintf(Buf, "%s = ", sp->name);
+ }
+ sr_buf(prefetch, sp->type == MTYPE);
+ if (sp->colnr == 0)
+ { sp->colnr = maxcolnr;
+ maxcolnr = 1+(maxcolnr%10);
+ }
+ colpos = nproc+sp->colnr-1;
+ if (columns == 2)
+ { pstext(colpos, Buf);
+ continue;
+ }
+ if (!xspin)
+ { printf("\t\t%s\n", Buf);
+ continue;
+ }
+ printf("MSC: ~G %s %s\n", sp->name, Buf);
+ printf("%3d:\tproc %3d (TRACK) line 1 \"var\" ",
+ depth, colpos);
+ printf("(state 0)\t[printf('MSC: globvar\\\\n')]\n");
+ printf("\t\t%s", sp->name);
+ if (sp->nel > 1) printf("[%d]", j);
+ printf(" = %s\n", Buf);
+ } } }
+}
+
+void
+dumplocal(RunList *r)
+{ static Lextok *dummy = ZN;
+ Symbol *z, *s;
+ int i;
+
+ if (!r) return;
+
+ s = r->symtab;
+
+ if (!dummy)
+ dummy = nn(ZN, NAME, nn(ZN,CONST,ZN,ZN), ZN);
+
+ for (z = s; z; z = z->next)
+ { if (z->type == STRUCT)
+ { dump_struct(z, z->name, r);
+ continue;
+ }
+ for (i = 0; i < z->nel; i++)
+ { if (z->type == CHAN)
+ { doq(z, i, r);
+ continue;
+ }
+ if ((verbose&4) && !(verbose&64)
+ && (z->setat < depth
+ && jumpsteps != depth))
+ continue;
+
+ dummy->sym = z;
+ dummy->lft->val = i;
+
+ printf("\t\t%s(%d):%s",
+ r->n->name, r->pid, z->name);
+ if (z->nel > 1) printf("[%d]", i);
+ printf(" = ");
+ sr_mesg(stdout, getval(dummy), z->type == MTYPE);
+ printf("\n");
+ if (limited_vis && (z->hidden&2))
+ { int colpos;
+ Buf[0] = '\0';
+ if (!xspin)
+ { if (columns == 2)
+ sprintf(Buf, "~G%s(%d):%s = ",
+ r->n->name, r->pid, z->name);
+ else
+ sprintf(Buf, "%s(%d):%s = ",
+ r->n->name, r->pid, z->name);
+ }
+ sr_buf(getval(dummy), z->type==MTYPE);
+ if (z->colnr == 0)
+ { z->colnr = maxcolnr;
+ maxcolnr = 1+(maxcolnr%10);
+ }
+ colpos = nproc+z->colnr-1;
+ if (columns == 2)
+ { pstext(colpos, Buf);
+ continue;
+ }
+ if (!xspin)
+ { printf("\t\t%s\n", Buf);
+ continue;
+ }
+ printf("MSC: ~G %s(%d):%s %s\n",
+ r->n->name, r->pid, z->name, Buf);
+
+ printf("%3d:\tproc %3d (TRACK) line 1 \"var\" ",
+ depth, colpos);
+ printf("(state 0)\t[printf('MSC: locvar\\\\n')]\n");
+ printf("\t\t%s(%d):%s",
+ r->n->name, r->pid, z->name);
+ if (z->nel > 1) printf("[%d]", i);
+ printf(" = %s\n", Buf);
+ } } }
+}
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