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 * Then he heard Merry change the note, and up went the Horn-cry of Buckland,
14 * Awake! Awake! Fear, Fire, Foes! Awake!
29 unset_cvowner(void *cvarg)
31 register CV* cv = (CV *) cvarg;
34 #endif /* DEBUGGING */
36 DEBUG_L((PerlIO_printf(PerlIO_stderr(), "%p unsetting CvOWNER of %p:%s\n",
37 thr, cv, SvPEEK((SV*)cv))));
38 MUTEX_LOCK(CvMUTEXP(cv));
39 DEBUG_L(if (CvDEPTH(cv) != 0)
40 PerlIO_printf(PerlIO_stderr(), "depth %ld != 0\n",
42 assert(thr == CvOWNER(cv));
44 MUTEX_UNLOCK(CvMUTEXP(cv));
47 #endif /* USE_THREADS */
59 TAINT_NOT; /* Each statement is presumed innocent */
60 stack_sp = stack_base + cxstack[cxstack_ix].blk_oldsp;
69 if (op->op_private & OPpLVAL_INTRO)
70 PUSHs(save_scalar(cGVOP->op_gv));
72 PUSHs(GvSV(cGVOP->op_gv));
93 sv_setpvn(TARG,s,len);
101 XPUSHs((SV*)cGVOP->op_gv);
112 RETURNOP(cLOGOP->op_other);
121 if (op->op_private & OPpASSIGN_BACKWARDS) {
123 temp = left; left = right; right = temp;
125 if (tainting && tainted && !SvTAINTED(left))
127 SvSetMagicSV(right, left);
136 RETURNOP(cCONDOP->op_true);
138 RETURNOP(cCONDOP->op_false);
144 TAINT_NOT; /* Each statement is presumed innocent */
145 stack_sp = stack_base + cxstack[cxstack_ix].blk_oldsp;
147 oldsave = scopestack[scopestack_ix - 1];
148 LEAVE_SCOPE(oldsave);
154 djSP; dATARGET; tryAMAGICbin(concat,opASSIGN);
161 sv_setpvn(TARG,s,len);
163 else if (SvGMAGICAL(TARG))
165 else if (!SvOK(TARG) && SvTYPE(TARG) <= SVt_PVMG) {
166 sv_setpv(TARG, ""); /* Suppress warning. */
167 s = SvPV_force(TARG, len);
171 sv_catpvn(TARG,s,len);
173 sv_setpvn(TARG,s,len); /* suppress warning */
183 if (op->op_flags & OPf_MOD) {
184 if (op->op_private & OPpLVAL_INTRO)
185 SAVECLEARSV(curpad[op->op_targ]);
186 else if (op->op_private & OPpDEREF) {
188 vivify_ref(curpad[op->op_targ], op->op_private & OPpDEREF);
197 last_in_gv = (GV*)(*stack_sp--);
198 return do_readline();
203 djSP; tryAMAGICbinSET(eq,0);
206 SETs(boolSV(TOPn == value));
214 if (SvREADONLY(TOPs) || SvTYPE(TOPs) > SVt_PVLV)
216 if (SvIOK(TOPs) && !SvNOK(TOPs) && !SvPOK(TOPs) &&
217 SvIVX(TOPs) != IV_MAX)
220 SvFLAGS(TOPs) &= ~(SVp_NOK|SVp_POK);
235 RETURNOP(cLOGOP->op_other);
241 djSP; dATARGET; tryAMAGICbin(add,opASSIGN);
244 SETn( left + right );
252 AV *av = GvAV((GV*)cSVOP->op_sv);
253 SV** svp = av_fetch(av, op->op_private, op->op_flags & OPf_MOD);
255 PUSHs(svp ? *svp : &sv_undef);
261 djSP; dMARK; dTARGET;
263 do_join(TARG, *MARK, MARK, SP);
274 * We ass_u_me that LvTARGOFF() comes first, and that two STRLENs
275 * will be enough to hold an OP*.
277 SV* sv = sv_newmortal();
278 sv_upgrade(sv, SVt_PVLV);
280 Copy(&op, &LvTARGOFF(sv), 1, OP*);
288 /* Oversized hot code. */
292 djSP; dMARK; dORIGMARK;
298 if (op->op_flags & OPf_STACKED)
302 if (SvRMAGICAL(gv) && (mg = mg_find((SV*)gv, 'q'))) {
303 if (MARK == ORIGMARK) {
304 /* If using default handle then we need to make space to
305 * pass object as 1st arg, so move other args up ...
309 Move(MARK, MARK + 1, (SP - MARK) + 1, SV*);
316 perl_call_method("PRINT", G_SCALAR);
324 if (!(io = GvIO(gv))) {
326 SV* sv = sv_newmortal();
327 gv_fullname3(sv, gv, Nullch);
328 warn("Filehandle %s never opened", SvPV(sv,na));
331 SETERRNO(EBADF,RMS$_IFI);
334 else if (!(fp = IoOFP(io))) {
336 SV* sv = sv_newmortal();
337 gv_fullname3(sv, gv, Nullch);
339 warn("Filehandle %s opened only for input", SvPV(sv,na));
341 warn("print on closed filehandle %s", SvPV(sv,na));
343 SETERRNO(EBADF,IoIFP(io)?RMS$_FAC:RMS$_IFI);
350 if (!do_print(*MARK, fp))
354 if (PerlIO_write(fp, ofs, ofslen) == 0 || PerlIO_error(fp)) {
363 if (!do_print(*MARK, fp))
372 if (PerlIO_write(fp, ors, orslen) == 0 || PerlIO_error(fp))
375 if (IoFLAGS(io) & IOf_FLUSH)
376 if (PerlIO_flush(fp) == EOF)
398 if (SvTYPE(av) != SVt_PVAV)
399 DIE("Not an ARRAY reference");
400 if (op->op_flags & OPf_REF) {
406 if (SvTYPE(sv) == SVt_PVAV) {
408 if (op->op_flags & OPf_REF) {
416 if (SvTYPE(sv) != SVt_PVGV) {
419 if (SvGMAGICAL(sv)) {
425 if (op->op_flags & OPf_REF ||
426 op->op_private & HINT_STRICT_REFS)
427 DIE(no_usym, "an ARRAY");
430 if (GIMME == G_ARRAY)
435 if (op->op_private & HINT_STRICT_REFS)
436 DIE(no_symref, sym, "an ARRAY");
437 gv = (GV*)gv_fetchpv(sym, TRUE, SVt_PVAV);
442 if (op->op_private & OPpLVAL_INTRO)
444 if (op->op_flags & OPf_REF) {
451 if (GIMME == G_ARRAY) {
452 I32 maxarg = AvFILL(av) + 1;
454 if (SvRMAGICAL(av)) {
456 for (i=0; i < maxarg; i++) {
457 SV **svp = av_fetch(av, i, FALSE);
458 SP[i+1] = (svp) ? *svp : &sv_undef;
462 Copy(AvARRAY(av), SP+1, maxarg, SV*);
468 I32 maxarg = AvFILL(av) + 1;
482 if (SvTYPE(hv) != SVt_PVHV && SvTYPE(hv) != SVt_PVAV)
483 DIE("Not a HASH reference");
484 if (op->op_flags & OPf_REF) {
490 if (SvTYPE(sv) == SVt_PVHV || SvTYPE(sv) == SVt_PVAV) {
492 if (op->op_flags & OPf_REF) {
500 if (SvTYPE(sv) != SVt_PVGV) {
503 if (SvGMAGICAL(sv)) {
509 if (op->op_flags & OPf_REF ||
510 op->op_private & HINT_STRICT_REFS)
511 DIE(no_usym, "a HASH");
514 if (GIMME == G_ARRAY) {
521 if (op->op_private & HINT_STRICT_REFS)
522 DIE(no_symref, sym, "a HASH");
523 gv = (GV*)gv_fetchpv(sym, TRUE, SVt_PVHV);
528 if (op->op_private & OPpLVAL_INTRO)
530 if (op->op_flags & OPf_REF) {
537 if (GIMME == G_ARRAY) { /* array wanted */
543 /* This bit is OK even when hv is really an AV */
545 sv_setpvf(TARG, "%ld/%ld",
546 (long)HvFILL(hv), (long)HvMAX(hv) + 1);
558 SV **lastlelem = stack_sp;
559 SV **lastrelem = stack_base + POPMARK;
560 SV **firstrelem = stack_base + POPMARK + 1;
561 SV **firstlelem = lastrelem + 1;
574 delaymagic = DM_DELAY; /* catch simultaneous items */
576 /* If there's a common identifier on both sides we have to take
577 * special care that assigning the identifier on the left doesn't
578 * clobber a value on the right that's used later in the list.
580 if (op->op_private & OPpASSIGN_COMMON) {
581 for (relem = firstrelem; relem <= lastrelem; relem++) {
584 TAINT_NOT; /* Each item is independent */
585 *relem = sv_mortalcopy(sv);
594 while (lelem <= lastlelem) {
595 TAINT_NOT; /* Each item stands on its own, taintwise. */
597 switch (SvTYPE(sv)) {
600 magic = SvMAGICAL(ary) != 0;
603 av_extend(ary, lastrelem - relem);
605 while (relem <= lastrelem) { /* gobble up all the rest */
611 didstore = av_store(ary,i++,sv);
625 magic = SvMAGICAL(hash) != 0;
628 while (relem < lastrelem) { /* gobble up all the rest */
633 sv = &sv_no, relem++;
634 tmpstr = NEWSV(29,0);
636 sv_setsv(tmpstr,*relem); /* value */
638 didstore = hv_store_ent(hash,sv,tmpstr,0);
640 if (SvSMAGICAL(tmpstr))
643 SvREFCNT_dec(tmpstr);
647 if (relem == lastrelem) {
651 if (relem == firstrelem &&
653 ( SvTYPE(SvRV(*relem)) == SVt_PVAV ||
654 SvTYPE(SvRV(*relem)) == SVt_PVHV ) )
655 warn("Reference found where even-sized list expected");
657 warn("Odd number of elements in hash assignment");
659 tmpstr = NEWSV(29,0);
660 didstore = hv_store_ent(hash,*relem,tmpstr,0);
662 if (SvSMAGICAL(tmpstr))
665 SvREFCNT_dec(tmpstr);
674 if (SvTHINKFIRST(sv)) {
675 if (SvREADONLY(sv) && curcop != &compiling) {
676 if (sv != &sv_undef && sv != &sv_yes && sv != &sv_no)
678 if (relem <= lastrelem)
685 if (relem <= lastrelem) {
686 sv_setsv(sv, *relem);
690 sv_setsv(sv, &sv_undef);
695 if (delaymagic & ~DM_DELAY) {
696 if (delaymagic & DM_UID) {
698 (void)setresuid(uid,euid,(Uid_t)-1);
701 (void)setreuid(uid,euid);
704 if ((delaymagic & DM_UID) == DM_RUID) {
706 delaymagic &= ~DM_RUID;
708 # endif /* HAS_SETRUID */
710 if ((delaymagic & DM_UID) == DM_EUID) {
712 delaymagic &= ~DM_EUID;
714 # endif /* HAS_SETEUID */
715 if (delaymagic & DM_UID) {
717 DIE("No setreuid available");
718 (void)PerlProc_setuid(uid);
720 # endif /* HAS_SETREUID */
721 #endif /* HAS_SETRESUID */
722 uid = (int)PerlProc_getuid();
723 euid = (int)PerlProc_geteuid();
725 if (delaymagic & DM_GID) {
727 (void)setresgid(gid,egid,(Gid_t)-1);
730 (void)setregid(gid,egid);
733 if ((delaymagic & DM_GID) == DM_RGID) {
735 delaymagic &= ~DM_RGID;
737 # endif /* HAS_SETRGID */
739 if ((delaymagic & DM_GID) == DM_EGID) {
741 delaymagic &= ~DM_EGID;
743 # endif /* HAS_SETEGID */
744 if (delaymagic & DM_GID) {
746 DIE("No setregid available");
747 (void)PerlProc_setgid(gid);
749 # endif /* HAS_SETREGID */
750 #endif /* HAS_SETRESGID */
751 gid = (int)PerlProc_getgid();
752 egid = (int)PerlProc_getegid();
754 tainting |= (uid && (euid != uid || egid != gid));
761 else if (gimme == G_SCALAR) {
764 SETi(lastrelem - firstrelem + 1);
770 SP = firstrelem + (lastlelem - firstlelem);
771 lelem = firstlelem + (relem - firstrelem);
773 *relem++ = (lelem <= lastlelem) ? *lelem++ : &sv_undef;
781 register PMOP *pm = cPMOP;
788 register REGEXP *rx = pm->op_pmregexp;
793 I32 oldsave = savestack_ix;
794 I32 update_minmatch = 1;
797 if (op->op_flags & OPf_STACKED)
803 PUTBACK; /* EVAL blocks need stack_sp. */
807 DIE("panic: do_match");
808 rxtainted = ((pm->op_pmdynflags & PMdf_TAINTED) ||
809 (tainted && (pm->op_pmflags & PMf_RETAINT)));
812 if (pm->op_pmdynflags & PMdf_USED) {
814 if (gimme == G_ARRAY)
819 if (!rx->prelen && curpm) {
821 rx = pm->op_pmregexp;
823 if (rx->minlen > len) goto failure;
825 screamer = ( (SvSCREAM(TARG) && rx->check_substr
826 && SvTYPE(rx->check_substr) == SVt_PVBM
827 && SvVALID(rx->check_substr))
830 if (global = pm->op_pmflags & PMf_GLOBAL) {
832 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
833 MAGIC* mg = mg_find(TARG, 'g');
834 if (mg && mg->mg_len >= 0) {
835 rx->endp[0] = rx->startp[0] = s + mg->mg_len;
836 minmatch = (mg->mg_flags & MGf_MINMATCH);
841 if (!rx->nparens && !global)
842 gimme = G_SCALAR; /* accidental array context? */
843 safebase = (((gimme == G_ARRAY) || global || !rx->nparens)
845 safebase = safebase ? 0 : REXEC_COPY_STR ;
846 if (pm->op_pmflags & (PMf_MULTILINE|PMf_SINGLELINE)) {
848 multiline = pm->op_pmflags & PMf_MULTILINE;
852 if (global && rx->startp[0]) {
854 if ((s + rx->minlen) > strend)
856 if (update_minmatch++)
857 minmatch = (s == rx->startp[0]);
859 if (rx->check_substr) {
860 if (!(rx->reganch & ROPT_NOSCAN)) { /* Floating checkstring. */
864 if (screamfirst[BmRARE(rx->check_substr)] < 0)
866 else if (!(s = screaminstr(TARG, rx->check_substr,
867 rx->check_offset_min, 0, &p, 0)))
869 else if ((rx->reganch & ROPT_CHECK_ALL)
870 && !sawampersand && !SvTAIL(rx->check_substr))
873 else if (!(s = fbm_instr((unsigned char*)s + rx->check_offset_min,
874 (unsigned char*)strend,
875 rx->check_substr, 0)))
877 else if ((rx->reganch & ROPT_CHECK_ALL) && !sawampersand)
879 if (s && rx->check_offset_max < t - s) {
880 ++BmUSEFUL(rx->check_substr);
881 s -= rx->check_offset_max;
886 /* Now checkstring is fixed, i.e. at fixed offset from the
887 beginning of match, and the match is anchored at s. */
888 else if (!multiline) { /* Anchored near beginning of string. */
890 if (*SvPVX(rx->check_substr) != s[rx->check_offset_min]
891 || ((slen = SvCUR(rx->check_substr)) > 1
892 && memNE(SvPVX(rx->check_substr),
893 s + rx->check_offset_min, slen)))
896 if (!rx->naughty && --BmUSEFUL(rx->check_substr) < 0
897 && rx->check_substr == rx->float_substr) {
898 SvREFCNT_dec(rx->check_substr);
899 rx->check_substr = Nullsv; /* opt is being useless */
900 rx->float_substr = Nullsv;
903 if (regexec_flags(rx, s, strend, truebase, minmatch,
904 screamer, NULL, safebase))
907 if (pm->op_pmflags & PMf_ONCE)
908 pm->op_pmdynflags |= PMdf_USED;
916 RX_MATCH_TAINTED_SET(rx, rxtainted);
917 if (gimme == G_ARRAY) {
921 if (global && !iters)
925 SPAGAIN; /* EVAL blocks could move the stack. */
926 EXTEND(SP, iters + i);
927 EXTEND_MORTAL(iters + i);
928 for (i = !i; i <= iters; i++) {
929 PUSHs(sv_newmortal());
931 if ((s = rx->startp[i]) && rx->endp[i] ) {
932 len = rx->endp[i] - s;
933 sv_setpvn(*SP, s, len);
937 truebase = rx->subbeg;
939 if (rx->startp[0] && rx->startp[0] == rx->endp[0])
941 PUTBACK; /* EVAL blocks may use stack */
944 LEAVE_SCOPE(oldsave);
950 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG))
951 mg = mg_find(TARG, 'g');
953 sv_magic(TARG, (SV*)0, 'g', Nullch, 0);
954 mg = mg_find(TARG, 'g');
957 mg->mg_len = rx->endp[0] - rx->subbeg;
958 if (rx->startp[0] == rx->endp[0])
959 mg->mg_flags |= MGf_MINMATCH;
961 mg->mg_flags &= ~MGf_MINMATCH;
964 LEAVE_SCOPE(oldsave);
968 yup: /* Confirmed by check_substr */
969 RX_MATCH_TAINTED_SET(rx, rxtainted);
970 ++BmUSEFUL(rx->check_substr);
972 if (pm->op_pmflags & PMf_ONCE)
973 pm->op_pmdynflags |= PMdf_USED;
974 Safefree(rx->subbase);
975 rx->subbase = Nullch;
977 rx->subbeg = truebase;
980 rx->endp[0] = s + SvCUR(rx->check_substr);
986 tmps = rx->subbase = savepvn(t, strend-t);
988 rx->subend = tmps + (strend-t);
989 tmps = rx->startp[0] = tmps + (s - t);
990 rx->endp[0] = tmps + SvCUR(rx->check_substr);
992 LEAVE_SCOPE(oldsave);
996 if (rx->check_substr)
997 ++BmUSEFUL(rx->check_substr);
1000 if (global && !(pm->op_pmflags & PMf_CONTINUE)) {
1001 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
1002 MAGIC* mg = mg_find(TARG, 'g');
1007 LEAVE_SCOPE(oldsave);
1008 if (gimme == G_ARRAY)
1016 dSP; dTARGETSTACKED;
1021 register IO *io = GvIO(last_in_gv);
1022 register I32 type = op->op_type;
1023 I32 gimme = GIMME_V;
1026 if (SvRMAGICAL(last_in_gv) && (mg = mg_find((SV*)last_in_gv, 'q'))) {
1031 perl_call_method("READLINE", gimme);
1034 if (gimme == G_SCALAR)
1035 SvSetMagicSV_nosteal(TARG, TOPs);
1042 if (IoFLAGS(io) & IOf_ARGV) {
1043 if (IoFLAGS(io) & IOf_START) {
1044 IoFLAGS(io) &= ~IOf_START;
1046 if (av_len(GvAVn(last_in_gv)) < 0) {
1047 do_open(last_in_gv,"-",1,FALSE,0,0,Nullfp);
1048 sv_setpvn(GvSV(last_in_gv), "-", 1);
1049 SvSETMAGIC(GvSV(last_in_gv));
1054 fp = nextargv(last_in_gv);
1055 if (!fp) { /* Note: fp != IoIFP(io) */
1056 (void)do_close(last_in_gv, FALSE); /* now it does*/
1057 IoFLAGS(io) |= IOf_START;
1060 else if (type == OP_GLOB) {
1061 SV *tmpcmd = NEWSV(55, 0);
1065 #ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
1066 /* since spawning off a process is a real performance hit */
1068 #include <descrip.h>
1069 #include <lib$routines.h>
1072 char rslt[NAM$C_MAXRSS+1+sizeof(unsigned short int)] = {'\0','\0'};
1073 char vmsspec[NAM$C_MAXRSS+1];
1074 char *rstr = rslt + sizeof(unsigned short int), *begin, *end, *cp;
1075 char tmpfnam[L_tmpnam] = "SYS$SCRATCH:";
1076 $DESCRIPTOR(dfltdsc,"SYS$DISK:[]*.*;");
1079 struct dsc$descriptor_s wilddsc
1080 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
1081 struct dsc$descriptor_vs rsdsc
1082 = {sizeof rslt, DSC$K_DTYPE_VT, DSC$K_CLASS_VS, rslt};
1083 unsigned long int cxt = 0, sts = 0, ok = 1, hasdir = 0, hasver = 0, isunix = 0;
1085 /* We could find out if there's an explicit dev/dir or version
1086 by peeking into lib$find_file's internal context at
1087 ((struct NAM *)((struct FAB *)cxt)->fab$l_nam)->nam$l_fnb
1088 but that's unsupported, so I don't want to do it now and
1089 have it bite someone in the future. */
1090 strcat(tmpfnam,PerlLIO_tmpnam(NULL));
1091 cp = SvPV(tmpglob,i);
1093 if (cp[i] == ';') hasver = 1;
1095 if (sts) hasver = 1;
1099 hasdir = isunix = 1;
1102 if (cp[i] == ']' || cp[i] == '>' || cp[i] == ':') {
1107 if ((tmpfp = PerlIO_open(tmpfnam,"w+","fop=dlt")) != NULL) {
1109 if (!PerlLIO_stat(SvPVX(tmpglob),&st) && S_ISDIR(st.st_mode))
1110 ok = ((wilddsc.dsc$a_pointer = tovmspath(SvPVX(tmpglob),vmsspec)) != NULL);
1111 else ok = ((wilddsc.dsc$a_pointer = tovmsspec(SvPVX(tmpglob),vmsspec)) != NULL);
1112 if (ok) wilddsc.dsc$w_length = (unsigned short int) strlen(wilddsc.dsc$a_pointer);
1113 while (ok && ((sts = lib$find_file(&wilddsc,&rsdsc,&cxt,
1114 &dfltdsc,NULL,NULL,NULL))&1)) {
1115 end = rstr + (unsigned long int) *rslt;
1116 if (!hasver) while (*end != ';') end--;
1117 *(end++) = '\n'; *end = '\0';
1118 for (cp = rstr; *cp; cp++) *cp = _tolower(*cp);
1120 if (isunix) trim_unixpath(rstr,SvPVX(tmpglob),1);
1125 while (*(--begin) != ']' && *begin != '>') ;
1128 ok = (PerlIO_puts(tmpfp,begin) != EOF);
1130 if (cxt) (void)lib$find_file_end(&cxt);
1131 if (ok && sts != RMS$_NMF &&
1132 sts != RMS$_DNF && sts != RMS$_FNF) ok = 0;
1135 SETERRNO((sts == RMS$_SYN ? EINVAL : EVMSERR),sts);
1137 PerlIO_close(tmpfp);
1141 PerlIO_rewind(tmpfp);
1143 IoIFP(io) = fp = tmpfp;
1144 IoFLAGS(io) &= ~IOf_UNTAINT; /* maybe redundant */
1151 sv_setpv(tmpcmd, "for a in ");
1152 sv_catsv(tmpcmd, tmpglob);
1153 sv_catpv(tmpcmd, "; do echo \"$a\\0\\c\"; done |");
1156 sv_setpv(tmpcmd, "/dev/dosglob/"); /* File System Extension */
1157 sv_catsv(tmpcmd, tmpglob);
1159 sv_setpv(tmpcmd, "perlglob ");
1160 sv_catsv(tmpcmd, tmpglob);
1161 sv_catpv(tmpcmd, " |");
1166 sv_setpvn(tmpcmd, cshname, cshlen);
1167 sv_catpv(tmpcmd, " -cf 'set nonomatch; glob ");
1168 sv_catsv(tmpcmd, tmpglob);
1169 sv_catpv(tmpcmd, "' 2>/dev/null |");
1171 sv_setpv(tmpcmd, "echo ");
1172 sv_catsv(tmpcmd, tmpglob);
1174 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\012\\012\\012\\012'|");
1176 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
1179 #endif /* !DOSISH */
1180 (void)do_open(last_in_gv, SvPVX(tmpcmd), SvCUR(tmpcmd),
1181 FALSE, 0, 0, Nullfp);
1187 else if (type == OP_GLOB)
1191 if (dowarn && io && !(IoFLAGS(io) & IOf_START))
1192 warn("Read on closed filehandle <%s>", GvENAME(last_in_gv));
1193 if (gimme == G_SCALAR) {
1194 (void)SvOK_off(TARG);
1200 if (gimme == G_SCALAR) {
1204 (void)SvUPGRADE(sv, SVt_PV);
1205 tmplen = SvLEN(sv); /* remember if already alloced */
1207 Sv_Grow(sv, 80); /* try short-buffering it */
1208 if (type == OP_RCATLINE)
1214 sv = sv_2mortal(NEWSV(57, 80));
1218 if (!sv_gets(sv, fp, offset)) {
1219 PerlIO_clearerr(fp);
1220 if (IoFLAGS(io) & IOf_ARGV) {
1221 fp = nextargv(last_in_gv);
1224 (void)do_close(last_in_gv, FALSE);
1225 IoFLAGS(io) |= IOf_START;
1227 else if (type == OP_GLOB) {
1228 if (do_close(last_in_gv, FALSE) & ~0xFF)
1229 warn("internal error: glob failed");
1231 if (gimme == G_SCALAR) {
1232 (void)SvOK_off(TARG);
1237 /* This should not be marked tainted if the fp is marked clean */
1238 if (!(IoFLAGS(io) & IOf_UNTAINT)) {
1245 if (type == OP_GLOB) {
1248 if (SvCUR(sv) > 0 && SvCUR(rs) > 0) {
1249 tmps = SvEND(sv) - 1;
1250 if (*tmps == *SvPVX(rs)) {
1255 for (tmps = SvPVX(sv); *tmps; tmps++)
1256 if (!isALPHA(*tmps) && !isDIGIT(*tmps) &&
1257 strchr("$&*(){}[]'\";\\|?<>~`", *tmps))
1259 if (*tmps && PerlLIO_stat(SvPVX(sv), &statbuf) < 0) {
1260 (void)POPs; /* Unmatched wildcard? Chuck it... */
1264 if (gimme == G_ARRAY) {
1265 if (SvLEN(sv) - SvCUR(sv) > 20) {
1266 SvLEN_set(sv, SvCUR(sv)+1);
1267 Renew(SvPVX(sv), SvLEN(sv), char);
1269 sv = sv_2mortal(NEWSV(58, 80));
1272 else if (gimme == G_SCALAR && !tmplen && SvLEN(sv) - SvCUR(sv) > 80) {
1273 /* try to reclaim a bit of scalar space (only on 1st alloc) */
1277 SvLEN_set(sv, SvCUR(sv)+40); /* allow some slop */
1278 Renew(SvPVX(sv), SvLEN(sv), char);
1287 register PERL_CONTEXT *cx;
1288 I32 gimme = OP_GIMME(op, -1);
1291 if (cxstack_ix >= 0)
1292 gimme = cxstack[cxstack_ix].blk_gimme;
1300 PUSHBLOCK(cx, CXt_BLOCK, SP);
1312 U32 lval = op->op_flags & OPf_MOD;
1313 U32 defer = op->op_private & OPpLVAL_DEFER;
1315 if (SvTYPE(hv) == SVt_PVHV) {
1316 he = hv_fetch_ent(hv, keysv, lval && !defer, 0);
1317 svp = he ? &HeVAL(he) : 0;
1319 else if (SvTYPE(hv) == SVt_PVAV) {
1320 svp = avhv_fetch_ent((AV*)hv, keysv, lval && !defer, 0);
1326 if (!svp || *svp == &sv_undef) {
1330 DIE(no_helem, SvPV(keysv, na));
1331 lv = sv_newmortal();
1332 sv_upgrade(lv, SVt_PVLV);
1334 sv_magic(lv, key2 = newSVsv(keysv), 'y', Nullch, 0);
1335 SvREFCNT_dec(key2); /* sv_magic() increments refcount */
1336 LvTARG(lv) = SvREFCNT_inc(hv);
1341 if (op->op_private & OPpLVAL_INTRO) {
1342 if (HvNAME(hv) && isGV(*svp))
1343 save_gp((GV*)*svp, !(op->op_flags & OPf_SPECIAL));
1345 save_helem(hv, keysv, svp);
1347 else if (op->op_private & OPpDEREF)
1348 vivify_ref(*svp, op->op_private & OPpDEREF);
1350 PUSHs(svp ? *svp : &sv_undef);
1357 register PERL_CONTEXT *cx;
1363 if (op->op_flags & OPf_SPECIAL) {
1364 cx = &cxstack[cxstack_ix];
1365 cx->blk_oldpm = curpm; /* fake block should preserve $1 et al */
1370 gimme = OP_GIMME(op, -1);
1372 if (cxstack_ix >= 0)
1373 gimme = cxstack[cxstack_ix].blk_gimme;
1379 if (gimme == G_VOID)
1381 else if (gimme == G_SCALAR) {
1384 if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP))
1387 *MARK = sv_mortalcopy(TOPs);
1394 else if (gimme == G_ARRAY) {
1395 /* in case LEAVE wipes old return values */
1396 for (mark = newsp + 1; mark <= SP; mark++) {
1397 if (!(SvFLAGS(*mark) & (SVs_PADTMP|SVs_TEMP))) {
1398 *mark = sv_mortalcopy(*mark);
1399 TAINT_NOT; /* Each item is independent */
1403 curpm = newpm; /* Don't pop $1 et al till now */
1413 register PERL_CONTEXT *cx;
1418 cx = &cxstack[cxstack_ix];
1419 if (cx->cx_type != CXt_LOOP)
1420 DIE("panic: pp_iter");
1422 av = cx->blk_loop.iterary;
1423 if (SvTYPE(av) != SVt_PVAV) {
1424 /* iterate ($min .. $max) */
1425 if (cx->blk_loop.iterlval) {
1426 /* string increment */
1427 register SV* cur = cx->blk_loop.iterlval;
1429 char *max = SvPV((SV*)av, maxlen);
1430 if (!SvNIOK(cur) && SvCUR(cur) <= maxlen) {
1431 sv_setsv(*cx->blk_loop.itervar, cur);
1432 if (strEQ(SvPVX(cur), max))
1433 sv_setiv(cur, 0); /* terminate next time */
1440 /* integer increment */
1441 if (cx->blk_loop.iterix > cx->blk_loop.itermax)
1443 sv_setiv(*cx->blk_loop.itervar, cx->blk_loop.iterix++);
1448 if (cx->blk_loop.iterix >= (av == curstack ? cx->blk_oldsp : AvFILL(av)))
1451 SvREFCNT_dec(*cx->blk_loop.itervar);
1453 if (sv = (SvMAGICAL(av))
1454 ? *av_fetch(av, ++cx->blk_loop.iterix, FALSE)
1455 : AvARRAY(av)[++cx->blk_loop.iterix])
1459 if (av != curstack && SvIMMORTAL(sv)) {
1460 SV *lv = cx->blk_loop.iterlval;
1461 if (lv && SvREFCNT(lv) > 1) {
1466 SvREFCNT_dec(LvTARG(lv));
1468 lv = cx->blk_loop.iterlval = NEWSV(26, 0);
1469 sv_upgrade(lv, SVt_PVLV);
1471 sv_magic(lv, Nullsv, 'y', Nullch, 0);
1473 LvTARG(lv) = SvREFCNT_inc(av);
1474 LvTARGOFF(lv) = cx->blk_loop.iterix;
1475 LvTARGLEN(lv) = (UV) -1;
1479 *cx->blk_loop.itervar = SvREFCNT_inc(sv);
1486 register PMOP *pm = cPMOP;
1502 register REGEXP *rx = pm->op_pmregexp;
1504 int force_on_match = 0;
1505 I32 oldsave = savestack_ix;
1506 I32 update_minmatch = 1;
1509 /* known replacement string? */
1510 dstr = (pm->op_pmflags & PMf_CONST) ? POPs : Nullsv;
1511 if (op->op_flags & OPf_STACKED)
1517 if (SvREADONLY(TARG)
1518 || (SvTYPE(TARG) > SVt_PVLV
1519 && !(SvTYPE(TARG) == SVt_PVGV && SvFAKE(TARG))))
1523 s = SvPV(TARG, len);
1524 if (!SvPOKp(TARG) || SvTYPE(TARG) == SVt_PVGV)
1526 rxtainted = ((pm->op_pmdynflags & PMdf_TAINTED) ||
1527 (tainted && (pm->op_pmflags & PMf_RETAINT)));
1534 DIE("panic: do_subst");
1537 maxiters = (strend - s) + 10;
1539 if (!rx->prelen && curpm) {
1541 rx = pm->op_pmregexp;
1543 screamer = ( (SvSCREAM(TARG) && rx->check_substr
1544 && SvTYPE(rx->check_substr) == SVt_PVBM
1545 && SvVALID(rx->check_substr))
1547 safebase = (!rx->nparens && !sawampersand) ? 0 : REXEC_COPY_STR;
1548 if (pm->op_pmflags & (PMf_MULTILINE|PMf_SINGLELINE)) {
1550 multiline = pm->op_pmflags & PMf_MULTILINE;
1553 if (rx->check_substr) {
1554 if (!(rx->reganch & ROPT_NOSCAN)) { /* It floats. */
1558 if (screamfirst[BmRARE(rx->check_substr)] < 0)
1560 else if (!(s = screaminstr(TARG, rx->check_substr, rx->check_offset_min, 0, &p, 0)))
1563 else if (!(s = fbm_instr((unsigned char*)s + rx->check_offset_min,
1564 (unsigned char*)strend,
1565 rx->check_substr, 0)))
1567 if (s && rx->check_offset_max < s - m) {
1568 ++BmUSEFUL(rx->check_substr);
1569 s -= rx->check_offset_max;
1574 /* Now checkstring is fixed, i.e. at fixed offset from the
1575 beginning of match, and the match is anchored at s. */
1576 else if (!multiline) { /* Anchored at beginning of string. */
1578 if (*SvPVX(rx->check_substr) != s[rx->check_offset_min]
1579 || ((slen = SvCUR(rx->check_substr)) > 1
1580 && memNE(SvPVX(rx->check_substr),
1581 s + rx->check_offset_min, slen)))
1584 if (!rx->naughty && --BmUSEFUL(rx->check_substr) < 0
1585 && rx->check_substr == rx->float_substr) {
1586 SvREFCNT_dec(rx->check_substr);
1587 rx->check_substr = Nullsv; /* opt is being useless */
1588 rx->float_substr = Nullsv;
1592 /* only replace once? */
1593 once = !(rpm->op_pmflags & PMf_GLOBAL);
1595 /* known replacement string? */
1596 c = dstr ? SvPV(dstr, clen) : Nullch;
1598 /* can do inplace substitution? */
1599 if (c && clen <= rx->minlen && (once || !(safebase & REXEC_COPY_STR))
1600 && !(rx->reganch & ROPT_LOOKBEHIND_SEEN)) {
1601 if (!regexec_flags(rx, s, strend, orig, 0, screamer, NULL, safebase)) {
1604 LEAVE_SCOPE(oldsave);
1607 if (force_on_match) {
1609 s = SvPV_force(TARG, len);
1614 SvSCREAM_off(TARG); /* disable possible screamer */
1616 rxtainted |= RX_MATCH_TAINTED(rx);
1618 m = orig + (rx->startp[0] - rx->subbase);
1619 d = orig + (rx->endp[0] - rx->subbase);
1625 if (m - s > strend - d) { /* faster to shorten from end */
1627 Copy(c, m, clen, char);
1632 Move(d, m, i, char);
1636 SvCUR_set(TARG, m - s);
1639 else if (i = m - s) { /* faster from front */
1647 Copy(c, m, clen, char);
1652 Copy(c, d, clen, char);
1657 TAINT_IF(rxtainted & 1);
1663 if (iters++ > maxiters)
1664 DIE("Substitution loop");
1665 rxtainted |= RX_MATCH_TAINTED(rx);
1670 Move(s, d, i, char);
1674 Copy(c, d, clen, char);
1678 } while (regexec_flags(rx, s, strend, orig, s == m,
1679 Nullsv, NULL, 0)); /* don't match same null twice */
1682 SvCUR_set(TARG, d - SvPVX(TARG) + i);
1683 Move(s, d, i+1, char); /* include the NUL */
1685 TAINT_IF(rxtainted & 1);
1687 PUSHs(sv_2mortal(newSViv((I32)iters)));
1689 (void)SvPOK_only(TARG);
1690 TAINT_IF(rxtainted);
1691 if (SvSMAGICAL(TARG)) {
1697 LEAVE_SCOPE(oldsave);
1701 if (regexec_flags(rx, s, strend, orig, 0, screamer, NULL, safebase)) {
1702 if (force_on_match) {
1704 s = SvPV_force(TARG, len);
1707 rxtainted |= RX_MATCH_TAINTED(rx);
1708 dstr = NEWSV(25, len);
1709 sv_setpvn(dstr, m, s-m);
1712 register PERL_CONTEXT *cx;
1715 RETURNOP(cPMOP->op_pmreplroot);
1718 if (iters++ > maxiters)
1719 DIE("Substitution loop");
1720 rxtainted |= RX_MATCH_TAINTED(rx);
1721 if (rx->subbase && rx->subbase != orig) {
1726 strend = s + (strend - m);
1729 sv_catpvn(dstr, s, m-s);
1732 sv_catpvn(dstr, c, clen);
1735 } while (regexec_flags(rx, s, strend, orig, s == m, Nullsv, NULL, safebase));
1736 sv_catpvn(dstr, s, strend - s);
1738 (void)SvOOK_off(TARG);
1739 Safefree(SvPVX(TARG));
1740 SvPVX(TARG) = SvPVX(dstr);
1741 SvCUR_set(TARG, SvCUR(dstr));
1742 SvLEN_set(TARG, SvLEN(dstr));
1746 TAINT_IF(rxtainted & 1);
1748 PUSHs(sv_2mortal(newSViv((I32)iters)));
1750 (void)SvPOK_only(TARG);
1751 TAINT_IF(rxtainted);
1754 LEAVE_SCOPE(oldsave);
1760 ++BmUSEFUL(rx->check_substr);
1765 LEAVE_SCOPE(oldsave);
1774 stack_base[markstack_ptr[-1]++] = stack_base[*markstack_ptr];
1776 LEAVE; /* exit inner scope */
1779 if (stack_base + *markstack_ptr > SP) {
1781 I32 gimme = GIMME_V;
1783 LEAVE; /* exit outer scope */
1784 (void)POPMARK; /* pop src */
1785 items = --*markstack_ptr - markstack_ptr[-1];
1786 (void)POPMARK; /* pop dst */
1787 SP = stack_base + POPMARK; /* pop original mark */
1788 if (gimme == G_SCALAR) {
1792 else if (gimme == G_ARRAY)
1799 ENTER; /* enter inner scope */
1802 src = stack_base[*markstack_ptr];
1806 RETURNOP(cLOGOP->op_other);
1817 register PERL_CONTEXT *cx;
1818 struct block_sub cxsub;
1821 POPSUB1(cx); /* Delay POPSUB2 until stack values are safe */
1824 if (gimme == G_SCALAR) {
1827 if (cxsub.cv && CvDEPTH(cxsub.cv) > 1) {
1829 *MARK = SvREFCNT_inc(TOPs);
1834 *MARK = sv_mortalcopy(TOPs);
1837 *MARK = SvTEMP(TOPs) ? TOPs : sv_mortalcopy(TOPs);
1844 else if (gimme == G_ARRAY) {
1845 for (MARK = newsp + 1; MARK <= SP; MARK++) {
1846 if (!SvTEMP(*MARK)) {
1847 *MARK = sv_mortalcopy(*MARK);
1848 TAINT_NOT; /* Each item is independent */
1854 POPSUB2(); /* Stack values are safe: release CV and @_ ... */
1855 curpm = newpm; /* ... and pop $1 et al */
1858 return pop_return();
1862 get_db_sub(SV **svp, CV *cv)
1865 SV *dbsv = GvSV(DBsub);
1867 if (!PERLDB_SUB_NN) {
1871 if ( (CvFLAGS(cv) & (CVf_ANON | CVf_CLONED))
1872 || strEQ(GvNAME(gv), "END")
1873 || ((GvCV(gv) != cv) && /* Could be imported, and old sub redefined. */
1874 !( (SvTYPE(*svp) == SVt_PVGV) && (GvCV((GV*)*svp) == cv)
1875 && (gv = (GV*)*svp) ))) {
1876 /* Use GV from the stack as a fallback. */
1877 /* GV is potentially non-unique, or contain different CV. */
1878 sv_setsv(dbsv, newRV((SV*)cv));
1881 gv_efullname3(dbsv, gv, Nullch);
1885 SvUPGRADE(dbsv, SVt_PVIV);
1887 SAVEIV(SvIVX(dbsv));
1888 SvIVX(dbsv) = (IV)cv; /* Do it the quickest way */
1903 register PERL_CONTEXT *cx;
1905 bool hasargs = (op->op_flags & OPf_STACKED) != 0;
1908 DIE("Not a CODE reference");
1909 switch (SvTYPE(sv)) {
1914 if (sv == &sv_yes) { /* unfound import, ignore */
1916 SP = stack_base + POPMARK;
1919 if (SvGMAGICAL(sv)) {
1921 sym = SvPOKp(sv) ? SvPVX(sv) : Nullch;
1926 DIE(no_usym, "a subroutine");
1927 if (op->op_private & HINT_STRICT_REFS)
1928 DIE(no_symref, sym, "a subroutine");
1929 cv = perl_get_cv(sym, TRUE);
1933 if (SvTYPE(cv) == SVt_PVCV)
1938 DIE("Not a CODE reference");
1943 if (!(cv = GvCVu((GV*)sv)))
1944 cv = sv_2cv(sv, &stash, &gv, TRUE);
1953 DIE("Not a CODE reference");
1955 if (!CvROOT(cv) && !CvXSUB(cv)) {
1959 /* anonymous or undef'd function leaves us no recourse */
1960 if (CvANON(cv) || !(gv = CvGV(cv)))
1961 DIE("Undefined subroutine called");
1962 /* autoloaded stub? */
1963 if (cv != GvCV(gv)) {
1967 /* should call AUTOLOAD now? */
1968 if ((autogv = gv_autoload4(GvSTASH(gv), GvNAME(gv), GvNAMELEN(gv),
1975 sub_name = sv_newmortal();
1976 gv_efullname3(sub_name, gv, Nullch);
1977 DIE("Undefined subroutine &%s called", SvPVX(sub_name));
1981 if ((op->op_private & OPpENTERSUB_DB) && GvCV(DBsub) && !CvNODEBUG(cv))
1982 cv = get_db_sub(&sv, cv);
1984 DIE("No DBsub routine");
1988 * First we need to check if the sub or method requires locking.
1989 * If so, we gain a lock on the CV, the first argument or the
1990 * stash (for static methods), as appropriate. This has to be
1991 * inline because for FAKE_THREADS, COND_WAIT inlines code to
1992 * reschedule by returning a new op.
1994 MUTEX_LOCK(CvMUTEXP(cv));
1995 if (CvFLAGS(cv) & CVf_LOCKED) {
1997 if (CvFLAGS(cv) & CVf_METHOD) {
1998 if (SP > stack_base + TOPMARK)
1999 sv = *(stack_base + TOPMARK + 1);
2001 MUTEX_UNLOCK(CvMUTEXP(cv));
2002 croak("no argument for locked method call");
2008 char *stashname = SvPV(sv, len);
2009 sv = (SV*)gv_stashpvn(stashname, len, TRUE);
2015 MUTEX_UNLOCK(CvMUTEXP(cv));
2016 mg = condpair_magic(sv);
2017 MUTEX_LOCK(MgMUTEXP(mg));
2018 if (MgOWNER(mg) == thr)
2019 MUTEX_UNLOCK(MgMUTEXP(mg));
2022 COND_WAIT(MgOWNERCONDP(mg), MgMUTEXP(mg));
2024 DEBUG_L(PerlIO_printf(PerlIO_stderr(), "%p: pp_entersub lock %p\n",
2026 MUTEX_UNLOCK(MgMUTEXP(mg));
2027 SvREFCNT_inc(sv); /* Keep alive until magic_mutexfree */
2028 save_destructor(unlock_condpair, sv);
2030 MUTEX_LOCK(CvMUTEXP(cv));
2033 * Now we have permission to enter the sub, we must distinguish
2034 * four cases. (0) It's an XSUB (in which case we don't care
2035 * about ownership); (1) it's ours already (and we're recursing);
2036 * (2) it's free (but we may already be using a cached clone);
2037 * (3) another thread owns it. Case (1) is easy: we just use it.
2038 * Case (2) means we look for a clone--if we have one, use it
2039 * otherwise grab ownership of cv. Case (3) means we look for a
2040 * clone (for non-XSUBs) and have to create one if we don't
2042 * Why look for a clone in case (2) when we could just grab
2043 * ownership of cv straight away? Well, we could be recursing,
2044 * i.e. we originally tried to enter cv while another thread
2045 * owned it (hence we used a clone) but it has been freed up
2046 * and we're now recursing into it. It may or may not be "better"
2047 * to use the clone but at least CvDEPTH can be trusted.
2049 if (CvOWNER(cv) == thr || CvXSUB(cv))
2050 MUTEX_UNLOCK(CvMUTEXP(cv));
2052 /* Case (2) or (3) */
2056 * XXX Might it be better to release CvMUTEXP(cv) while we
2057 * do the hv_fetch? We might find someone has pinched it
2058 * when we look again, in which case we would be in case
2059 * (3) instead of (2) so we'd have to clone. Would the fact
2060 * that we released the mutex more quickly make up for this?
2063 (svp = hv_fetch(thr->cvcache, (char *)cv, sizeof(cv), FALSE)))
2065 /* We already have a clone to use */
2066 MUTEX_UNLOCK(CvMUTEXP(cv));
2068 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
2069 "entersub: %p already has clone %p:%s\n",
2070 thr, cv, SvPEEK((SV*)cv)));
2073 if (CvDEPTH(cv) == 0)
2074 SAVEDESTRUCTOR(unset_cvowner, (void*) cv);
2077 /* (2) => grab ownership of cv. (3) => make clone */
2081 MUTEX_UNLOCK(CvMUTEXP(cv));
2082 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
2083 "entersub: %p grabbing %p:%s in stash %s\n",
2084 thr, cv, SvPEEK((SV*)cv), CvSTASH(cv) ?
2085 HvNAME(CvSTASH(cv)) : "(none)"));
2087 /* Make a new clone. */
2089 SvREFCNT_inc(cv); /* don't let it vanish from under us */
2090 MUTEX_UNLOCK(CvMUTEXP(cv));
2091 DEBUG_L((PerlIO_printf(PerlIO_stderr(),
2092 "entersub: %p cloning %p:%s\n",
2093 thr, cv, SvPEEK((SV*)cv))));
2095 * We're creating a new clone so there's no race
2096 * between the original MUTEX_UNLOCK and the
2097 * SvREFCNT_inc since no one will be trying to undef
2098 * it out from underneath us. At least, I don't think
2101 clonecv = cv_clone(cv);
2102 SvREFCNT_dec(cv); /* finished with this */
2103 hv_store(thr->cvcache, (char*)cv, sizeof(cv), (SV*)clonecv,0);
2104 CvOWNER(clonecv) = thr;
2108 DEBUG_L(if (CvDEPTH(cv) != 0)
2109 PerlIO_printf(PerlIO_stderr(), "depth %ld != 0\n",
2111 SAVEDESTRUCTOR(unset_cvowner, (void*) cv);
2114 #endif /* USE_THREADS */
2117 if (CvOLDSTYLE(cv)) {
2118 I32 (*fp3)_((int,int,int));
2120 register I32 items = SP - MARK;
2121 /* We dont worry to copy from @_. */
2126 stack_sp = mark + 1;
2127 fp3 = (I32(*)_((int,int,int)))CvXSUB(cv);
2128 items = (*fp3)(CvXSUBANY(cv).any_i32,
2129 MARK - stack_base + 1,
2131 stack_sp = stack_base + items;
2134 I32 markix = TOPMARK;
2139 /* Need to copy @_ to stack. Alternative may be to
2140 * switch stack to @_, and copy return values
2141 * back. This would allow popping @_ in XSUB, e.g.. XXXX */
2145 av = (AV*)curpad[0];
2148 #endif /* USE_THREADS */
2149 items = AvFILLp(av) + 1; /* @_ is not tieable */
2152 /* Mark is at the end of the stack. */
2154 Copy(AvARRAY(av), SP + 1, items, SV*);
2159 if (curcopdb) { /* We assume that the first
2160 XSUB in &DB::sub is the
2166 /* Do we need to open block here? XXXX */
2167 (void)(*CvXSUB(cv))(cv _PERL_OBJECT_THIS);
2169 /* Enforce some sanity in scalar context. */
2170 if (gimme == G_SCALAR && ++markix != stack_sp - stack_base ) {
2171 if (markix > stack_sp - stack_base)
2172 *(stack_base + markix) = &sv_undef;
2174 *(stack_base + markix) = *stack_sp;
2175 stack_sp = stack_base + markix;
2183 register I32 items = SP - MARK;
2184 AV* padlist = CvPADLIST(cv);
2185 SV** svp = AvARRAY(padlist);
2186 push_return(op->op_next);
2187 PUSHBLOCK(cx, CXt_SUB, MARK);
2190 if (CvDEPTH(cv) < 2)
2191 (void)SvREFCNT_inc(cv);
2192 else { /* save temporaries on recursion? */
2193 if (CvDEPTH(cv) == 100 && dowarn
2194 && !(PERLDB_SUB && cv == GvCV(DBsub)))
2195 sub_crush_depth(cv);
2196 if (CvDEPTH(cv) > AvFILLp(padlist)) {
2198 AV *newpad = newAV();
2199 SV **oldpad = AvARRAY(svp[CvDEPTH(cv)-1]);
2200 I32 ix = AvFILLp((AV*)svp[1]);
2201 svp = AvARRAY(svp[0]);
2202 for ( ;ix > 0; ix--) {
2203 if (svp[ix] != &sv_undef) {
2204 char *name = SvPVX(svp[ix]);
2205 if ((SvFLAGS(svp[ix]) & SVf_FAKE) /* outer lexical? */
2206 || *name == '&') /* anonymous code? */
2208 av_store(newpad, ix, SvREFCNT_inc(oldpad[ix]));
2210 else { /* our own lexical */
2212 av_store(newpad, ix, sv = (SV*)newAV());
2213 else if (*name == '%')
2214 av_store(newpad, ix, sv = (SV*)newHV());
2216 av_store(newpad, ix, sv = NEWSV(0,0));
2221 av_store(newpad, ix, sv = NEWSV(0,0));
2225 av = newAV(); /* will be @_ */
2227 av_store(newpad, 0, (SV*)av);
2228 AvFLAGS(av) = AVf_REIFY;
2229 av_store(padlist, CvDEPTH(cv), (SV*)newpad);
2230 AvFILLp(padlist) = CvDEPTH(cv);
2231 svp = AvARRAY(padlist);
2236 AV* av = (AV*)curpad[0];
2238 items = AvFILLp(av) + 1;
2240 /* Mark is at the end of the stack. */
2242 Copy(AvARRAY(av), SP + 1, items, SV*);
2247 #endif /* USE_THREADS */
2249 curpad = AvARRAY((AV*)svp[CvDEPTH(cv)]);
2252 #endif /* USE_THREADS */
2258 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
2259 "%p entersub preparing @_\n", thr));
2261 av = (AV*)curpad[0];
2267 cx->blk_sub.savearray = GvAV(defgv);
2268 GvAV(defgv) = (AV*)SvREFCNT_inc(av);
2269 #endif /* USE_THREADS */
2270 cx->blk_sub.argarray = av;
2273 if (items > AvMAX(av) + 1) {
2275 if (AvARRAY(av) != ary) {
2276 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
2277 SvPVX(av) = (char*)ary;
2279 if (items > AvMAX(av) + 1) {
2280 AvMAX(av) = items - 1;
2281 Renew(ary,items,SV*);
2283 SvPVX(av) = (char*)ary;
2286 Copy(MARK,AvARRAY(av),items,SV*);
2287 AvFILLp(av) = items - 1;
2296 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
2297 "%p entersub returning %p\n", thr, CvSTART(cv)));
2299 RETURNOP(CvSTART(cv));
2304 sub_crush_depth(CV *cv)
2307 warn("Deep recursion on anonymous subroutine");
2309 SV* tmpstr = sv_newmortal();
2310 gv_efullname3(tmpstr, CvGV(cv), Nullch);
2311 warn("Deep recursion on subroutine \"%s\"", SvPVX(tmpstr));
2321 U32 lval = op->op_flags & OPf_MOD;
2322 U32 defer = (op->op_private & OPpLVAL_DEFER) && (elem > AvFILL(av));
2325 elem -= curcop->cop_arybase;
2326 if (SvTYPE(av) != SVt_PVAV)
2328 svp = av_fetch(av, elem, lval && !defer);
2330 if (!svp || *svp == &sv_undef) {
2333 DIE(no_aelem, elem);
2334 lv = sv_newmortal();
2335 sv_upgrade(lv, SVt_PVLV);
2337 sv_magic(lv, Nullsv, 'y', Nullch, 0);
2338 LvTARG(lv) = SvREFCNT_inc(av);
2339 LvTARGOFF(lv) = elem;
2344 if (op->op_private & OPpLVAL_INTRO)
2345 save_aelem(av, elem, svp);
2346 else if (op->op_private & OPpDEREF)
2347 vivify_ref(*svp, op->op_private & OPpDEREF);
2349 PUSHs(svp ? *svp : &sv_undef);
2354 vivify_ref(SV *sv, U32 to_what)
2361 if (SvTYPE(sv) < SVt_RV)
2362 sv_upgrade(sv, SVt_RV);
2363 else if (SvTYPE(sv) >= SVt_PV) {
2364 (void)SvOOK_off(sv);
2365 Safefree(SvPVX(sv));
2366 SvLEN(sv) = SvCUR(sv) = 0;
2370 SvRV(sv) = NEWSV(355,0);
2373 SvRV(sv) = (SV*)newAV();
2376 SvRV(sv) = (SV*)newHV();
2397 if (SvTYPE(sv) == SVt_PVCV) {
2403 name = SvPV(TOPs, na);
2404 sv = *(stack_base + TOPMARK + 1);
2415 !(packname = SvPV(sv, packlen)) ||
2416 !(iogv = gv_fetchpv(packname, FALSE, SVt_PVIO)) ||
2417 !(ob=(SV*)GvIO(iogv)))
2419 if (!packname || !isIDFIRST(*packname))
2420 DIE("Can't call method \"%s\" without a package or object reference", name);
2421 stash = gv_stashpvn(packname, packlen, TRUE);
2424 *(stack_base + TOPMARK + 1) = sv_2mortal(newRV((SV*)iogv));
2427 if (!ob || !SvOBJECT(ob))
2428 DIE("Can't call method \"%s\" on unblessed reference", name);
2430 stash = SvSTASH(ob);
2433 gv = gv_fetchmethod(stash, name);
2439 for (p = name; *p; p++) {
2441 sep = p, leaf = p + 1;
2442 else if (*p == ':' && *(p + 1) == ':')
2443 sep = p, leaf = p + 2;
2445 if (!sep || ((sep - name) == 5 && strnEQ(name, "SUPER", 5))) {
2446 packname = HvNAME(sep ? curcop->cop_stash : stash);
2447 packlen = strlen(packname);
2451 packlen = sep - name;
2453 DIE("Can't locate object method \"%s\" via package \"%.*s\"",
2454 leaf, (int)packlen, packname);
2456 SETs(isGV(gv) ? (SV*)GvCV(gv) : (SV*)gv);