3 * Copyright (c) 1991-1997, Larry Wall
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
11 * "For the fashion of Minas Tirith was such that it was built on seven
26 av_extend(curstack, (p - stack_base) + (n) + 128);
34 cxstack_max = cxstack_max * 3 / 2;
35 Renew(cxstack, cxstack_max + 1, CONTEXT); /* XXX should fix CXINC macro */
36 return cxstack_ix + 1;
44 if (retstack_ix == retstack_max) {
45 retstack_max = retstack_max * 3 / 2;
46 Renew(retstack, retstack_max, OP*);
48 retstack[retstack_ix++] = retop;
56 return retstack[--retstack_ix];
65 if (scopestack_ix == scopestack_max) {
66 scopestack_max = scopestack_max * 3 / 2;
67 Renew(scopestack, scopestack_max, I32);
69 scopestack[scopestack_ix++] = savestack_ix;
77 I32 oldsave = scopestack[--scopestack_ix];
85 I32 oldmax = markstack_max - markstack;
86 I32 newmax = oldmax * 3 / 2;
88 Renew(markstack, newmax, I32);
89 markstack_ptr = markstack + oldmax;
90 markstack_max = markstack + newmax;
97 savestack_max = savestack_max * 3 / 2;
98 Renew(savestack, savestack_max, ANY);
105 /* XXX should tmps_floor live in cxstack? */
106 I32 myfloor = tmps_floor;
107 while (tmps_ix > myfloor) { /* clean up after last statement */
108 SV* sv = tmps_stack[tmps_ix];
109 tmps_stack[tmps_ix--] = Nullsv;
114 SvREFCNT_dec(sv); /* note, can modify tmps_ix!!! */
127 sv = *sptr = NEWSV(0,0);
128 if (SvTYPE(osv) >= SVt_PVMG && SvMAGIC(osv) && SvTYPE(osv) != SVt_PVGV) {
129 sv_upgrade(sv, SvTYPE(osv));
130 if (SvGMAGICAL(osv)) {
132 bool oldtainted = tainted;
134 if (tainting && tainted && (mg = mg_find(osv, 't'))) {
135 SAVESPTR(mg->mg_obj);
138 SvFLAGS(osv) |= (SvFLAGS(osv) &
139 (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
140 tainted = oldtainted;
142 SvMAGIC(sv) = SvMAGIC(osv);
143 SvFLAGS(sv) |= SvMAGICAL(osv);
160 return save_scalar_at(&GvSV(gv));
171 SSPUSHINT(SAVEt_SVREF);
172 return save_scalar_at(sptr);
182 SSPUSHIV((IV)SvLEN(gv));
183 SvLEN(gv) = 0; /* forget that anything was allocated here */
184 SSPUSHIV((IV)SvCUR(gv));
185 SSPUSHPTR(SvPVX(gv));
187 SSPUSHPTR(SvREFCNT_inc(gv));
193 Newz(602, gp, 1, GP);
194 GvGP(gv) = gp_ref(gp);
195 GvSV(gv) = NEWSV(72,0);
196 GvLINE(gv) = curcop->cop_line;
214 SSPUSHPTR(oav = GvAVn(gv));
217 GvAV(gv) = Null(AV*);
220 SvMAGIC(av) = SvMAGIC(oav);
221 SvFLAGS(av) |= SvMAGICAL(oav);
240 SSPUSHPTR(ohv = GvHVn(gv));
243 GvHV(gv) = Null(HV*);
246 SvMAGIC(hv) = SvMAGIC(ohv);
247 SvFLAGS(hv) |= SvMAGICAL(ohv);
265 SSPUSHPTR(item); /* remember the pointer */
268 SSPUSHPTR(sv); /* remember the value */
269 SSPUSHINT(SAVEt_ITEM);
280 SSPUSHINT(SAVEt_INT);
291 SSPUSHINT(SAVEt_LONG);
302 SSPUSHINT(SAVEt_I32);
313 SSPUSHINT(SAVEt_I16);
327 /* Cannot use save_sptr() to store a char* since the SV** cast will
328 * force word-alignment and we'll miss the pointer.
338 SSPUSHINT(SAVEt_PPTR);
349 SSPUSHINT(SAVEt_SPTR);
359 SSPUSHINT(SAVEt_NSTAB);
370 SSPUSHINT(SAVEt_HPTR);
381 SSPUSHINT(SAVEt_APTR);
391 SSPUSHINT(SAVEt_FREESV);
401 SSPUSHINT(SAVEt_FREEOP);
411 SSPUSHINT(SAVEt_FREEPV);
420 SSPUSHLONG((long)(svp-curpad));
421 SSPUSHINT(SAVEt_CLEARSV);
425 save_delete(hv,key,klen)
435 SSPUSHINT(SAVEt_DELETE);
439 save_list(sarg,maxsarg)
447 SSCHECK(3 * maxsarg);
448 for (i = 1; i <= maxsarg; i++) {
449 SSPUSHPTR(sarg[i]); /* remember the pointer */
451 sv_setsv(sv,sarg[i]);
452 SSPUSHPTR(sv); /* remember the value */
453 SSPUSHINT(SAVEt_ITEM);
459 void (*f) _((void*));
466 SSPUSHINT(SAVEt_DESTRUCTOR);
491 croak("panic: corrupt saved stack index");
492 while (savestack_ix > base) {
494 case SAVEt_ITEM: /* normal string */
495 value = (SV*)SSPOPPTR;
497 sv_replace(sv,value);
502 case SAVEt_SV: /* scalar reference */
503 value = (SV*)SSPOPPTR;
507 case SAVEt_SVREF: /* scalar reference */
508 value = (SV*)SSPOPPTR;
512 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv) &&
513 SvTYPE(sv) != SVt_PVGV)
515 (void)SvUPGRADE(value, SvTYPE(sv));
516 SvMAGIC(value) = SvMAGIC(sv);
517 SvFLAGS(value) |= SvMAGICAL(sv);
521 else if (SvTYPE(value) >= SVt_PVMG && SvMAGIC(value) &&
522 SvTYPE(value) != SVt_PVGV)
524 SvFLAGS(value) |= (SvFLAGS(value) &
525 (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
526 SvMAGICAL_off(value);
535 case SAVEt_AV: /* array reference */
539 AV *goner = GvAV(gv);
540 SvMAGIC(av) = SvMAGIC(goner);
541 SvFLAGS(av) |= SvMAGICAL(goner);
542 SvMAGICAL_off(goner);
553 case SAVEt_HV: /* hash reference */
557 HV *goner = GvHV(gv);
558 SvMAGIC(hv) = SvMAGIC(goner);
559 SvFLAGS(hv) |= SvMAGICAL(goner);
560 SvMAGICAL_off(goner);
571 case SAVEt_INT: /* int reference */
573 *(int*)ptr = (int)SSPOPINT;
575 case SAVEt_LONG: /* long reference */
577 *(long*)ptr = (long)SSPOPLONG;
579 case SAVEt_I32: /* I32 reference */
581 *(I32*)ptr = (I32)SSPOPINT;
583 case SAVEt_I16: /* I16 reference */
585 *(I16*)ptr = (I16)SSPOPINT;
587 case SAVEt_IV: /* IV reference */
589 *(IV*)ptr = (IV)SSPOPIV;
591 case SAVEt_SPTR: /* SV* reference */
593 *(SV**)ptr = (SV*)SSPOPPTR;
595 case SAVEt_PPTR: /* char* reference */
597 *(char**)ptr = (char*)SSPOPPTR;
599 case SAVEt_HPTR: /* HV* reference */
601 *(HV**)ptr = (HV*)SSPOPPTR;
603 case SAVEt_APTR: /* AV* reference */
605 *(AV**)ptr = (AV*)SSPOPPTR;
609 (void)sv_clear((SV*)gv);
611 case SAVEt_GP: /* scalar reference */
616 if (SvPOK(gv) && SvLEN(gv) > 0) {
619 SvPVX(gv) = (char *)SSPOPPTR;
620 SvCUR(gv) = (STRLEN)SSPOPIV;
621 SvLEN(gv) = (STRLEN)SSPOPIV;
626 SvREFCNT_dec((SV*)ptr);
631 curpad = AvARRAY(comppad);
636 Safefree((char*)ptr);
639 ptr = (void*)&curpad[SSPOPLONG];
641 /* Can clear pad variable in place? */
642 if (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) {
643 if (SvTHINKFIRST(sv)) {
645 croak("panic: leave_scope clearsv");
652 switch (SvTYPE(sv)) {
662 croak("panic: leave_scope pad code");
674 else { /* Someone has a claim on this, so abandon it. */
675 U32 padflags = SvFLAGS(sv) & (SVs_PADBUSY|SVs_PADMY|SVs_PADTMP);
676 SvREFCNT_dec(sv); /* Cast current value to the winds. */
677 switch (SvTYPE(sv)) { /* Console ourselves with a new value */
678 case SVt_PVAV: *(SV**)ptr = (SV*)newAV(); break;
679 case SVt_PVHV: *(SV**)ptr = (SV*)newHV(); break;
680 default: *(SV**)ptr = NEWSV(0,0); break;
682 SvFLAGS(*(SV**)ptr) |= padflags; /* preserve pad nature */
689 (void)hv_delete(hv, (char*)ptr, (U32)SSPOPINT, G_DISCARD);
692 case SAVEt_DESTRUCTOR:
696 case SAVEt_REGCONTEXT:
698 I32 delta = SSPOPINT;
699 savestack_ix -= delta; /* regexp must have croaked */
702 case SAVEt_STACK_POS: /* Position on Perl stack */
704 I32 delta = SSPOPINT;
705 stack_sp = stack_base + delta;
712 croak("panic: leave_scope inconsistency");
724 PerlIO_printf(Perl_debug_log, "CX %ld = %s\n", (long)(cx - cxstack), block_type[cx->cx_type]);
725 if (cx->cx_type != CXt_SUBST) {
726 PerlIO_printf(Perl_debug_log, "BLK_OLDSP = %ld\n", (long)cx->blk_oldsp);
727 PerlIO_printf(Perl_debug_log, "BLK_OLDCOP = 0x%lx\n", (long)cx->blk_oldcop);
728 PerlIO_printf(Perl_debug_log, "BLK_OLDMARKSP = %ld\n", (long)cx->blk_oldmarksp);
729 PerlIO_printf(Perl_debug_log, "BLK_OLDSCOPESP = %ld\n", (long)cx->blk_oldscopesp);
730 PerlIO_printf(Perl_debug_log, "BLK_OLDRETSP = %ld\n", (long)cx->blk_oldretsp);
731 PerlIO_printf(Perl_debug_log, "BLK_OLDPM = 0x%lx\n", (long)cx->blk_oldpm);
732 PerlIO_printf(Perl_debug_log, "BLK_GIMME = %s\n", cx->blk_gimme ? "LIST" : "SCALAR");
734 switch (cx->cx_type) {
739 PerlIO_printf(Perl_debug_log, "BLK_SUB.CV = 0x%lx\n",
740 (long)cx->blk_sub.cv);
741 PerlIO_printf(Perl_debug_log, "BLK_SUB.GV = 0x%lx\n",
742 (long)cx->blk_sub.gv);
743 PerlIO_printf(Perl_debug_log, "BLK_SUB.DFOUTGV = 0x%lx\n",
744 (long)cx->blk_sub.dfoutgv);
745 PerlIO_printf(Perl_debug_log, "BLK_SUB.OLDDEPTH = %ld\n",
746 (long)cx->blk_sub.olddepth);
747 PerlIO_printf(Perl_debug_log, "BLK_SUB.HASARGS = %d\n",
748 (int)cx->blk_sub.hasargs);
751 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_IN_EVAL = %ld\n",
752 (long)cx->blk_eval.old_in_eval);
753 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_OP_TYPE = %s (%s)\n",
754 op_name[cx->blk_eval.old_op_type],
755 op_desc[cx->blk_eval.old_op_type]);
756 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_NAME = %s\n",
757 cx->blk_eval.old_name);
758 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_EVAL_ROOT = 0x%lx\n",
759 (long)cx->blk_eval.old_eval_root);
763 PerlIO_printf(Perl_debug_log, "BLK_LOOP.LABEL = %s\n",
765 PerlIO_printf(Perl_debug_log, "BLK_LOOP.RESETSP = %ld\n",
766 (long)cx->blk_loop.resetsp);
767 PerlIO_printf(Perl_debug_log, "BLK_LOOP.REDO_OP = 0x%lx\n",
768 (long)cx->blk_loop.redo_op);
769 PerlIO_printf(Perl_debug_log, "BLK_LOOP.NEXT_OP = 0x%lx\n",
770 (long)cx->blk_loop.next_op);
771 PerlIO_printf(Perl_debug_log, "BLK_LOOP.LAST_OP = 0x%lx\n",
772 (long)cx->blk_loop.last_op);
773 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERIX = %ld\n",
774 (long)cx->blk_loop.iterix);
775 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERARY = 0x%lx\n",
776 (long)cx->blk_loop.iterary);
777 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERVAR = 0x%lx\n",
778 (long)cx->blk_loop.itervar);
779 if (cx->blk_loop.itervar)
780 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERSAVE = 0x%lx\n",
781 (long)cx->blk_loop.itersave);
782 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERLVAL = 0x%lx\n",
783 (long)cx->blk_loop.iterlval);
787 PerlIO_printf(Perl_debug_log, "SB_ITERS = %ld\n",
789 PerlIO_printf(Perl_debug_log, "SB_MAXITERS = %ld\n",
790 (long)cx->sb_maxiters);
791 PerlIO_printf(Perl_debug_log, "SB_SAFEBASE = %ld\n",
792 (long)cx->sb_safebase);
793 PerlIO_printf(Perl_debug_log, "SB_ONCE = %ld\n",
795 PerlIO_printf(Perl_debug_log, "SB_ORIG = %s\n",
797 PerlIO_printf(Perl_debug_log, "SB_DSTR = 0x%lx\n",
799 PerlIO_printf(Perl_debug_log, "SB_TARG = 0x%lx\n",
801 PerlIO_printf(Perl_debug_log, "SB_S = 0x%lx\n",
803 PerlIO_printf(Perl_debug_log, "SB_M = 0x%lx\n",
805 PerlIO_printf(Perl_debug_log, "SB_STREND = 0x%lx\n",
806 (long)cx->sb_strend);
807 PerlIO_printf(Perl_debug_log, "SB_RXRES = 0x%lx\n",