314 lines
6.9 KiB
C
314 lines
6.9 KiB
C
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/***** spin: guided.c *****/
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/* Copyright (c) 1989-2003 by Lucent Technologies, Bell Laboratories. */
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/* All Rights Reserved. This software is for educational purposes only. */
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/* No guarantee whatsoever is expressed or implied by the distribution of */
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/* this code. Permission is given to distribute this code provided that */
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/* this introductory message is not removed and no monies are exchanged. */
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/* Software written by Gerard J. Holzmann. For tool documentation see: */
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/* http://spinroot.com/ */
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/* Send all bug-reports and/or questions to: bugs@spinroot.com */
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#include "spin.h"
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#include <sys/types.h>
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#include <sys/stat.h>
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#include "y.tab.h"
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extern RunList *run, *X;
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extern Element *Al_El;
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extern Symbol *Fname, *oFname;
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extern int verbose, lineno, xspin, jumpsteps, depth, merger, cutoff;
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extern int nproc, nstop, Tval, ntrail, columns;
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extern short Have_claim, Skip_claim;
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extern void ana_src(int, int);
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int TstOnly = 0, pno;
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static int lastclaim = -1;
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static FILE *fd;
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static void lost_trail(void);
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static void
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whichproc(int p)
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{ RunList *oX;
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for (oX = run; oX; oX = oX->nxt)
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if (oX->pid == p)
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{ printf("(%s) ", oX->n->name);
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break;
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}
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}
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static int
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newer(char *f1, char *f2)
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{
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#if defined(WIN32) || defined(WIN64)
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struct _stat x, y;
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#else
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struct stat x, y;
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#endif
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if (stat(f1, (struct stat *)&x) < 0) return 0;
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if (stat(f2, (struct stat *)&y) < 0) return 1;
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if (x.st_mtime < y.st_mtime) return 0;
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return 1;
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}
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void
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hookup(void)
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{ Element *e;
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for (e = Al_El; e; e = e->Nxt)
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if (e->n
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&& (e->n->ntyp == ATOMIC
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|| e->n->ntyp == NON_ATOMIC
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|| e->n->ntyp == D_STEP))
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(void) huntstart(e);
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}
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int
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not_claim(void)
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{
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return (!Have_claim || !X || X->pid != 0);
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}
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void
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match_trail(void)
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{ int i, a, nst;
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Element *dothis;
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char snap[512], *q;
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/*
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* if source model name is leader.pml
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* look for the trail file under these names:
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* leader.pml.trail
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* leader.pml.tra
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* leader.trail
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* leader.tra
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*/
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if (ntrail)
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sprintf(snap, "%s%d.trail", oFname->name, ntrail);
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else
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sprintf(snap, "%s.trail", oFname->name);
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if ((fd = fopen(snap, "r")) == NULL)
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{ snap[strlen(snap)-2] = '\0'; /* .tra */
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if ((fd = fopen(snap, "r")) == NULL)
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{ if ((q = strchr(oFname->name, '.')) != NULL)
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{ *q = '\0';
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if (ntrail)
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sprintf(snap, "%s%d.trail",
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oFname->name, ntrail);
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else
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sprintf(snap, "%s.trail",
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oFname->name);
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*q = '.';
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if ((fd = fopen(snap, "r")) != NULL)
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goto okay;
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snap[strlen(snap)-2] = '\0'; /* last try */
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if ((fd = fopen(snap, "r")) != NULL)
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goto okay;
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}
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printf("spin: cannot find trail file\n");
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alldone(1);
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} }
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okay:
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if (xspin == 0 && newer(oFname->name, snap))
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printf("spin: warning, \"%s\" is newer than %s\n",
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oFname->name, snap);
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Tval = 1;
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/*
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* sets Tval because timeouts may be part of trail
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* this used to also set m_loss to 1, but that is
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* better handled with the runtime -m flag
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*/
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hookup();
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while (fscanf(fd, "%d:%d:%d\n", &depth, &pno, &nst) == 3)
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{ if (depth == -2) { start_claim(pno); continue; }
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if (depth == -4) { merger = 1; ana_src(0, 1); continue; }
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if (depth == -1)
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{ if (verbose)
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{ if (columns == 2)
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dotag(stdout, " CYCLE>\n");
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else
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dotag(stdout, "<<<<<START OF CYCLE>>>>>\n");
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}
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continue;
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}
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if (cutoff > 0 && depth >= cutoff)
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{ printf("-------------\n");
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printf("depth-limit (-u%d steps) reached\n", cutoff);
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break;
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}
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if (Skip_claim && pno == 0) continue;
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for (dothis = Al_El; dothis; dothis = dothis->Nxt)
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{ if (dothis->Seqno == nst)
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break;
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}
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if (!dothis)
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{ printf("%3d: proc %d, no matching stmnt %d\n",
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depth, pno - Have_claim, nst);
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lost_trail();
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}
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i = nproc - nstop + Skip_claim;
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if (dothis->n->ntyp == '@')
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{ if (pno == i-1)
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{ run = run->nxt;
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nstop++;
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if (verbose&4)
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{ if (columns == 2)
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{ dotag(stdout, "<end>\n");
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continue;
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}
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if (Have_claim && pno == 0)
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printf("%3d: claim terminates\n",
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depth);
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else
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printf("%3d: proc %d terminates\n",
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depth, pno - Have_claim);
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}
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continue;
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}
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if (pno <= 1) continue; /* init dies before never */
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printf("%3d: stop error, ", depth);
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printf("proc %d (i=%d) trans %d, %c\n",
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pno - Have_claim, i, nst, dothis->n->ntyp);
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lost_trail();
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}
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for (X = run; X; X = X->nxt)
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{ if (--i == pno)
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break;
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}
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if (!X)
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{ printf("%3d: no process %d ", depth, pno - Have_claim);
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printf("(state %d)\n", nst);
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lost_trail();
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}
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X->pc = dothis;
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lineno = dothis->n->ln;
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Fname = dothis->n->fn;
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if (dothis->n->ntyp == D_STEP)
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{ Element *g, *og = dothis;
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do {
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g = eval_sub(og);
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if (g && depth >= jumpsteps
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&& ((verbose&32) || ((verbose&4) && not_claim())))
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{ if (columns != 2)
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{ p_talk(og, 1);
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if (og->n->ntyp == D_STEP)
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og = og->n->sl->this->frst;
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printf("\t[");
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comment(stdout, og->n, 0);
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printf("]\n");
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}
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if (verbose&1) dumpglobals();
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if (verbose&2) dumplocal(X);
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if (xspin) printf("\n");
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}
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og = g;
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} while (g && g != dothis->nxt);
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if (X != NULL)
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{ X->pc = g?huntele(g, 0, -1):g;
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}
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} else
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{
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keepgoing: if (dothis->merge_start)
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a = dothis->merge_start;
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else
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a = dothis->merge;
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if (X != NULL)
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{ X->pc = eval_sub(dothis);
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if (X->pc) X->pc = huntele(X->pc, 0, a);
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}
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if (depth >= jumpsteps
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&& ((verbose&32) || ((verbose&4) && not_claim()))) /* -v or -p */
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{ if (columns != 2)
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{ p_talk(dothis, 1);
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if (dothis->n->ntyp == D_STEP)
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dothis = dothis->n->sl->this->frst;
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printf("\t[");
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comment(stdout, dothis->n, 0);
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printf("]");
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if (a && (verbose&32))
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printf("\t<merge %d now @%d>",
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dothis->merge,
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(X && X->pc)?X->pc->seqno:-1);
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printf("\n");
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}
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if (verbose&1) dumpglobals();
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if (verbose&2) dumplocal(X);
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if (xspin) printf("\n");
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if (X && !X->pc)
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{ X->pc = dothis;
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printf("\ttransition failed\n");
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a = 0; /* avoid inf loop */
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}
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}
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if (a && X && X->pc && X->pc->seqno != a)
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{ dothis = X->pc;
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goto keepgoing;
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} }
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if (Have_claim && X && X->pid == 0
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&& dothis && dothis->n
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&& lastclaim != dothis->n->ln)
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{ lastclaim = dothis->n->ln;
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if (columns == 2)
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{ char t[128];
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sprintf(t, "#%d", lastclaim);
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pstext(0, t);
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} else
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{
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printf("Never claim moves to line %d\t[", lastclaim);
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comment(stdout, dothis->n, 0);
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printf("]\n");
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} } }
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printf("spin: trail ends after %d steps\n", depth);
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wrapup(0);
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}
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static void
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lost_trail(void)
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{ int d, p, n, l;
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while (fscanf(fd, "%d:%d:%d:%d\n", &d, &p, &n, &l) == 4)
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{ printf("step %d: proc %d ", d, p); whichproc(p);
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printf("(state %d) - d %d\n", n, l);
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}
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wrapup(1); /* no return */
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}
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int
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pc_value(Lextok *n)
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{ int i = nproc - nstop;
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int pid = eval(n);
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RunList *Y;
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for (Y = run; Y; Y = Y->nxt)
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{ if (--i == pid)
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return Y->pc->seqno;
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}
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return 0;
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}
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