3 * Copyright (c) 1991-1994, 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
19 * This value determines how small an SV is "small enough" to keep
20 * in a lexical variable in anticipation of the next invocation.
22 #define PADVAL_SMALL_ENOUGH 240
31 av_extend(curstack, (p - stack_base) + (n) + 128);
38 cxstack_max = cxstack_max * 3 / 2;
39 Renew(cxstack, cxstack_max + 1, CONTEXT); /* XXX should fix CXINC macro */
40 return cxstack_ix + 1;
47 if (retstack_ix == retstack_max) {
48 retstack_max = retstack_max * 3 / 2;
49 Renew(retstack, retstack_max, OP*);
51 retstack[retstack_ix++] = retop;
58 return retstack[--retstack_ix];
66 if (scopestack_ix == scopestack_max) {
67 scopestack_max = scopestack_max * 3 / 2;
68 Renew(scopestack, scopestack_max, I32);
70 scopestack[scopestack_ix++] = savestack_ix;
77 I32 oldsave = scopestack[--scopestack_ix];
84 I32 oldmax = markstack_max - markstack;
85 I32 newmax = oldmax * 3 / 2;
87 Renew(markstack, newmax, I32);
88 markstack_ptr = markstack + oldmax;
89 markstack_max = markstack + newmax;
95 savestack_max = savestack_max * 3 / 2;
96 Renew(savestack, savestack_max, ANY);
102 /* XXX should tmps_floor live in cxstack? */
103 I32 myfloor = tmps_floor;
104 while (tmps_ix > myfloor) { /* clean up after last statement */
105 SV* sv = tmps_stack[tmps_ix];
106 tmps_stack[tmps_ix--] = Nullsv;
111 SvREFCNT_dec(sv); /* note, can modify tmps_ix!!! */
123 sv = *sptr = NEWSV(0,0);
124 if (SvTYPE(osv) >= SVt_PVMG && SvMAGIC(osv) && SvTYPE(osv) != SVt_PVGV) {
125 sv_upgrade(sv, SvTYPE(osv));
126 if (SvGMAGICAL(osv)) {
128 bool oldtainted = tainted;
130 if (tainting && tainted && (mg = mg_find(osv, 't'))) {
131 SAVESPTR(mg->mg_obj);
134 SvFLAGS(osv) |= (SvFLAGS(osv) &
135 (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
136 tainted = oldtainted;
138 SvMAGIC(sv) = SvMAGIC(osv);
139 SvFLAGS(sv) |= SvMAGICAL(osv);
155 return save_scalar_at(&GvSV(gv));
165 SSPUSHINT(SAVEt_SVREF);
166 return save_scalar_at(sptr);
175 SSPUSHPTR(SvREFCNT_inc(gv));
181 Newz(602, gp, 1, GP);
184 GvSV(gv) = NEWSV(72,0);
185 GvLINE(gv) = curcop->cop_line;
189 GvGP(gv)->gp_refcnt++;
200 SSPUSHPTR(GvAVn(gv));
203 GvAV(gv) = Null(AV*);
213 SSPUSHPTR(GvHVn(gv));
216 GvHV(gv) = Null(HV*);
227 SSPUSHPTR(item); /* remember the pointer */
230 SSPUSHPTR(sv); /* remember the value */
231 SSPUSHINT(SAVEt_ITEM);
241 SSPUSHINT(SAVEt_INT);
251 SSPUSHINT(SAVEt_LONG);
261 SSPUSHINT(SAVEt_I32);
271 SSPUSHINT(SAVEt_I16);
284 /* Cannot use save_sptr() to store a char* since the SV** cast will
285 * force word-alignment and we'll miss the pointer.
294 SSPUSHINT(SAVEt_PPTR);
304 SSPUSHINT(SAVEt_SPTR);
313 SSPUSHINT(SAVEt_NSTAB);
323 SSPUSHINT(SAVEt_HPTR);
333 SSPUSHINT(SAVEt_APTR);
342 SSPUSHINT(SAVEt_FREESV);
351 SSPUSHINT(SAVEt_FREEOP);
360 SSPUSHINT(SAVEt_FREEPV);
368 SSPUSHLONG((long)(svp-curpad));
369 SSPUSHINT(SAVEt_CLEARSV);
373 save_delete(hv,key,klen)
382 SSPUSHINT(SAVEt_DELETE);
386 save_list(sarg,maxsarg)
393 SSCHECK(3 * maxsarg);
394 for (i = 1; i <= maxsarg; i++) {
395 SSPUSHPTR(sarg[i]); /* remember the pointer */
397 sv_setsv(sv,sarg[i]);
398 SSPUSHPTR(sv); /* remember the value */
399 SSPUSHINT(SAVEt_ITEM);
405 void (*f) _((void*));
411 SSPUSHINT(SAVEt_DESTRUCTOR);
426 croak("panic: corrupt saved stack index");
427 while (savestack_ix > base) {
429 case SAVEt_ITEM: /* normal string */
430 value = (SV*)SSPOPPTR;
432 sv_replace(sv,value);
437 case SAVEt_SV: /* scalar reference */
438 value = (SV*)SSPOPPTR;
442 case SAVEt_SVREF: /* scalar reference */
443 value = (SV*)SSPOPPTR;
447 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv) &&
448 SvTYPE(sv) != SVt_PVGV)
450 (void)SvUPGRADE(value, SvTYPE(sv));
451 SvMAGIC(value) = SvMAGIC(sv);
452 SvFLAGS(value) |= SvMAGICAL(sv);
456 else if (SvTYPE(value) >= SVt_PVMG && SvMAGIC(value) &&
457 SvTYPE(value) != SVt_PVGV)
459 SvFLAGS(value) |= (SvFLAGS(value) &
460 (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
461 SvMAGICAL_off(value);
470 case SAVEt_AV: /* array reference */
473 SvREFCNT_dec(GvAV(gv));
476 case SAVEt_HV: /* hash reference */
479 SvREFCNT_dec(GvHV(gv));
482 case SAVEt_INT: /* int reference */
484 *(int*)ptr = (int)SSPOPINT;
486 case SAVEt_LONG: /* long reference */
488 *(long*)ptr = (long)SSPOPLONG;
490 case SAVEt_I32: /* I32 reference */
492 *(I32*)ptr = (I32)SSPOPINT;
494 case SAVEt_I16: /* I16 reference */
496 *(I16*)ptr = (I16)SSPOPINT;
498 case SAVEt_IV: /* IV reference */
500 *(IV*)ptr = (IV)SSPOPIV;
502 case SAVEt_SPTR: /* SV* reference */
504 *(SV**)ptr = (SV*)SSPOPPTR;
506 case SAVEt_PPTR: /* char* reference */
508 *(char**)ptr = (char*)SSPOPPTR;
510 case SAVEt_HPTR: /* HV* reference */
512 *(HV**)ptr = (HV*)SSPOPPTR;
514 case SAVEt_APTR: /* AV* reference */
516 *(AV**)ptr = (AV*)SSPOPPTR;
520 (void)sv_clear((SV*)gv);
522 case SAVEt_GP: /* scalar reference */
531 SvREFCNT_dec((SV*)ptr);
535 curpad = AvARRAY(comppad);
540 Safefree((char*)ptr);
543 ptr = (void*)&curpad[SSPOPLONG];
545 if (SvREFCNT(sv) <= 1) { /* Can clear pad variable in place. */
546 if (SvTHINKFIRST(sv)) {
548 croak("panic: leave_scope clearsv");
555 switch (SvTYPE(sv)) {
559 if (AvMAX(sv) < (PADVAL_SMALL_ENOUGH / sizeof(SV*)))
565 if (HvMAX(sv) < (PADVAL_SMALL_ENOUGH / sizeof(SV*)))
571 croak("panic: leave_scope pad code");
580 if (SvPVX(sv) && SvLEN(sv) > PADVAL_SMALL_ENOUGH) {
589 else { /* Someone has a claim on this, so abandon it. */
590 U32 padflags = SvFLAGS(sv) & (SVs_PADBUSY|SVs_PADMY|SVs_PADTMP);
591 SvREFCNT_dec(sv); /* Cast current value to the winds. */
592 switch (SvTYPE(sv)) { /* Console ourselves with a new value */
593 case SVt_PVAV: *(SV**)ptr = (SV*)newAV(); break;
594 case SVt_PVHV: *(SV**)ptr = (SV*)newHV(); break;
595 default: *(SV**)ptr = NEWSV(0,0); break;
597 SvFLAGS(*(SV**)ptr) |= padflags; /* preserve pad nature */
604 (void)hv_delete(hv, (char*)ptr, (U32)SSPOPINT, G_DISCARD);
607 case SAVEt_DESTRUCTOR:
611 case SAVEt_REGCONTEXT:
613 I32 delta = SSPOPINT;
614 savestack_ix -= delta; /* regexp must have croaked */
617 case SAVEt_STACK_POS: /* Position on Perl stack */
619 I32 delta = SSPOPINT;
620 stack_sp = stack_base + delta;
624 croak("panic: leave_scope inconsistency");
635 PerlIO_printf(Perl_debug_log, "CX %d = %s\n", cx - cxstack, block_type[cx->cx_type]);
636 if (cx->cx_type != CXt_SUBST) {
637 PerlIO_printf(Perl_debug_log, "BLK_OLDSP = %ld\n", (long)cx->blk_oldsp);
638 PerlIO_printf(Perl_debug_log, "BLK_OLDCOP = 0x%lx\n", (long)cx->blk_oldcop);
639 PerlIO_printf(Perl_debug_log, "BLK_OLDMARKSP = %ld\n", (long)cx->blk_oldmarksp);
640 PerlIO_printf(Perl_debug_log, "BLK_OLDSCOPESP = %ld\n", (long)cx->blk_oldscopesp);
641 PerlIO_printf(Perl_debug_log, "BLK_OLDRETSP = %ld\n", (long)cx->blk_oldretsp);
642 PerlIO_printf(Perl_debug_log, "BLK_OLDPM = 0x%lx\n", (long)cx->blk_oldpm);
643 PerlIO_printf(Perl_debug_log, "BLK_GIMME = %s\n", cx->blk_gimme ? "LIST" : "SCALAR");
645 switch (cx->cx_type) {
650 PerlIO_printf(Perl_debug_log, "BLK_SUB.CV = 0x%lx\n",
651 (long)cx->blk_sub.cv);
652 PerlIO_printf(Perl_debug_log, "BLK_SUB.GV = 0x%lx\n",
653 (long)cx->blk_sub.gv);
654 PerlIO_printf(Perl_debug_log, "BLK_SUB.DFOUTGV = 0x%lx\n",
655 (long)cx->blk_sub.dfoutgv);
656 PerlIO_printf(Perl_debug_log, "BLK_SUB.OLDDEPTH = %ld\n",
657 (long)cx->blk_sub.olddepth);
658 PerlIO_printf(Perl_debug_log, "BLK_SUB.HASARGS = %d\n",
659 (int)cx->blk_sub.hasargs);
662 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_IN_EVAL = %ld\n",
663 (long)cx->blk_eval.old_in_eval);
664 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_OP_TYPE = %s (%s)\n",
665 op_name[cx->blk_eval.old_op_type],
666 op_desc[cx->blk_eval.old_op_type]);
667 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_NAME = %s\n",
668 cx->blk_eval.old_name);
669 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_EVAL_ROOT = 0x%lx\n",
670 (long)cx->blk_eval.old_eval_root);
674 PerlIO_printf(Perl_debug_log, "BLK_LOOP.LABEL = %s\n",
676 PerlIO_printf(Perl_debug_log, "BLK_LOOP.RESETSP = %ld\n",
677 (long)cx->blk_loop.resetsp);
678 PerlIO_printf(Perl_debug_log, "BLK_LOOP.REDO_OP = 0x%lx\n",
679 (long)cx->blk_loop.redo_op);
680 PerlIO_printf(Perl_debug_log, "BLK_LOOP.NEXT_OP = 0x%lx\n",
681 (long)cx->blk_loop.next_op);
682 PerlIO_printf(Perl_debug_log, "BLK_LOOP.LAST_OP = 0x%lx\n",
683 (long)cx->blk_loop.last_op);
684 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERIX = %ld\n",
685 (long)cx->blk_loop.iterix);
686 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERARY = 0x%lx\n",
687 (long)cx->blk_loop.iterary);
688 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERVAR = 0x%lx\n",
689 (long)cx->blk_loop.itervar);
690 if (cx->blk_loop.itervar)
691 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERSAVE = 0x%lx\n",
692 (long)cx->blk_loop.itersave);
693 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERLVAL = 0x%lx\n",
694 (long)cx->blk_loop.iterlval);
698 PerlIO_printf(Perl_debug_log, "SB_ITERS = %ld\n",
700 PerlIO_printf(Perl_debug_log, "SB_MAXITERS = %ld\n",
701 (long)cx->sb_maxiters);
702 PerlIO_printf(Perl_debug_log, "SB_SAFEBASE = %ld\n",
703 (long)cx->sb_safebase);
704 PerlIO_printf(Perl_debug_log, "SB_ONCE = %ld\n",
706 PerlIO_printf(Perl_debug_log, "SB_ORIG = %s\n",
708 PerlIO_printf(Perl_debug_log, "SB_DSTR = 0x%lx\n",
710 PerlIO_printf(Perl_debug_log, "SB_TARG = 0x%lx\n",
712 PerlIO_printf(Perl_debug_log, "SB_S = 0x%lx\n",
714 PerlIO_printf(Perl_debug_log, "SB_M = 0x%lx\n",
716 PerlIO_printf(Perl_debug_log, "SB_STREND = 0x%lx\n",
717 (long)cx->sb_strend);
718 PerlIO_printf(Perl_debug_log, "SB_SUBBASE = 0x%lx\n",
719 (long)cx->sb_subbase);