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/* pp_hot.c
*
* Copyright (c) 1991-2001, Larry Wall
*
* You may distribute under the terms of either the GNU General Public
* License or the Artistic License, as specified in the README file.
*
*/
/*
* Then he heard Merry change the note, and up went the Horn-cry of Buckland,
* shaking the air.
*
* Awake! Awake! Fear, Fire, Foes! Awake!
* Fire, Foes! Awake!
*/
#include "EXTERN.h"
#define PERL_IN_PP_HOT_C
#include "perl.h"
/* Hot code. */
#ifdef USE_THREADS
static void unset_cvowner(pTHXo_ void *cvarg);
#endif /* USE_THREADS */
PP(pp_const)
{
dSP;
XPUSHs(cSVOP_sv);
RETURN;
}
PP(pp_nextstate)
{
PL_curcop = (COP*)PL_op;
TAINT_NOT; /* Each statement is presumed innocent */
PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
FREETMPS;
return NORMAL;
}
PP(pp_gvsv)
{
dSP;
EXTEND(SP,1);
if (PL_op->op_private & OPpLVAL_INTRO)
PUSHs(save_scalar(cGVOP_gv));
else
PUSHs(GvSV(cGVOP_gv));
RETURN;
}
PP(pp_null)
{
return NORMAL;
}
PP(pp_setstate)
{
PL_curcop = (COP*)PL_op;
return NORMAL;
}
PP(pp_pushmark)
{
PUSHMARK(PL_stack_sp);
return NORMAL;
}
PP(pp_stringify)
{
dSP; dTARGET;
STRLEN len;
char *s;
s = SvPV(TOPs,len);
sv_setpvn(TARG,s,len);
if (SvUTF8(TOPs))
SvUTF8_on(TARG);
else
SvUTF8_off(TARG);
SETTARG;
RETURN;
}
PP(pp_gv)
{
dSP;
XPUSHs((SV*)cGVOP_gv);
RETURN;
}
PP(pp_and)
{
dSP;
if (!SvTRUE(TOPs))
RETURN;
else {
--SP;
RETURNOP(cLOGOP->op_other);
}
}
PP(pp_sassign)
{
dSP; dPOPTOPssrl;
if (PL_op->op_private & OPpASSIGN_BACKWARDS) {
SV *temp;
temp = left; left = right; right = temp;
}
if (PL_tainting && PL_tainted && !SvTAINTED(left))
TAINT_NOT;
SvSetMagicSV(right, left);
SETs(right);
RETURN;
}
PP(pp_cond_expr)
{
dSP;
if (SvTRUEx(POPs))
RETURNOP(cLOGOP->op_other);
else
RETURNOP(cLOGOP->op_next);
}
PP(pp_unstack)
{
I32 oldsave;
TAINT_NOT; /* Each statement is presumed innocent */
PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
FREETMPS;
oldsave = PL_scopestack[PL_scopestack_ix - 1];
LEAVE_SCOPE(oldsave);
return NORMAL;
}
PP(pp_concat)
{
dSP; dATARGET; tryAMAGICbin(concat,opASSIGN);
{
dPOPTOPssrl;
SV* rcopy = Nullsv;
if (SvGMAGICAL(left))
mg_get(left);
if (TARG == right && SvGMAGICAL(right))
mg_get(right);
if (TARG == right && left != right)
/* Clone since otherwise we cannot prepend. */
rcopy = sv_2mortal(newSVsv(right));
if (TARG != left)
sv_setsv(TARG, left);
if (TARG == right) {
if (left == right) {
/* $right = $right . $right; */
STRLEN rlen;
char *rpv = SvPV(right, rlen);
sv_catpvn(TARG, rpv, rlen);
}
else /* $right = $left . $right; */
sv_catsv(TARG, rcopy);
}
else {
if (!SvOK(TARG)) /* Avoid warning when concatenating to undef. */
sv_setpv(TARG, "");
/* $other = $left . $right; */
/* $left = $left . $right; */
sv_catsv(TARG, right);
}
#if defined(PERL_Y2KWARN)
if ((SvIOK(right) || SvNOK(right)) && ckWARN(WARN_Y2K)) {
STRLEN n;
char *s = SvPV(TARG,n);
if (n >= 2 && s[n-2] == '1' && s[n-1] == '9'
&& (n == 2 || !isDIGIT(s[n-3])))
{
Perl_warner(aTHX_ WARN_Y2K, "Possible Y2K bug: %s",
"about to append an integer to '19'");
}
}
#endif
SETTARG;
RETURN;
}
}
PP(pp_padsv)
{
dSP; dTARGET;
XPUSHs(TARG);
if (PL_op->op_flags & OPf_MOD) {
if (PL_op->op_private & OPpLVAL_INTRO)
SAVECLEARSV(PL_curpad[PL_op->op_targ]);
else if (PL_op->op_private & OPpDEREF) {
PUTBACK;
vivify_ref(PL_curpad[PL_op->op_targ], PL_op->op_private & OPpDEREF);
SPAGAIN;
}
}
RETURN;
}
PP(pp_readline)
{
tryAMAGICunTARGET(iter, 0);
PL_last_in_gv = (GV*)(*PL_stack_sp--);
if (SvTYPE(PL_last_in_gv) != SVt_PVGV) {
if (SvROK(PL_last_in_gv) && SvTYPE(SvRV(PL_last_in_gv)) == SVt_PVGV)
PL_last_in_gv = (GV*)SvRV(PL_last_in_gv);
else {
dSP;
XPUSHs((SV*)PL_last_in_gv);
PUTBACK;
pp_rv2gv();
PL_last_in_gv = (GV*)(*PL_stack_sp--);
}
}
return do_readline();
}
PP(pp_eq)
{
dSP; tryAMAGICbinSET(eq,0);
{
dPOPnv;
SETs(boolSV(TOPn == value));
RETURN;
}
}
PP(pp_preinc)
{
dSP;
if (SvREADONLY(TOPs) || SvTYPE(TOPs) > SVt_PVLV)
DIE(aTHX_ PL_no_modify);
if (SvIOK_notUV(TOPs) && !SvNOK(TOPs) && !SvPOK(TOPs) &&
SvIVX(TOPs) != IV_MAX)
{
++SvIVX(TOPs);
SvFLAGS(TOPs) &= ~(SVp_NOK|SVp_POK);
}
else
sv_inc(TOPs);
SvSETMAGIC(TOPs);
return NORMAL;
}
PP(pp_or)
{
dSP;
if (SvTRUE(TOPs))
RETURN;
else {
--SP;
RETURNOP(cLOGOP->op_other);
}
}
PP(pp_add)
{
dSP; dATARGET; tryAMAGICbin(add,opASSIGN);
{
dPOPTOPnnrl_ul;
SETn( left + right );
RETURN;
}
}
PP(pp_aelemfast)
{
dSP;
AV *av = GvAV(cGVOP_gv);
U32 lval = PL_op->op_flags & OPf_MOD;
SV** svp = av_fetch(av, PL_op->op_private, lval);
SV *sv = (svp ? *svp : &PL_sv_undef);
EXTEND(SP, 1);
if (!lval && SvGMAGICAL(sv)) /* see note in pp_helem() */
sv = sv_mortalcopy(sv);
PUSHs(sv);
RETURN;
}
PP(pp_join)
{
dSP; dMARK; dTARGET;
MARK++;
do_join(TARG, *MARK, MARK, SP);
SP = MARK;
SETs(TARG);
RETURN;
}
PP(pp_pushre)
{
dSP;
#ifdef DEBUGGING
/*
* We ass_u_me that LvTARGOFF() comes first, and that two STRLENs
* will be enough to hold an OP*.
*/
SV* sv = sv_newmortal();
sv_upgrade(sv, SVt_PVLV);
LvTYPE(sv) = '/';
Copy(&PL_op, &LvTARGOFF(sv), 1, OP*);
XPUSHs(sv);
#else
XPUSHs((SV*)PL_op);
#endif
RETURN;
}
/* Oversized hot code. */
PP(pp_print)
{
dSP; dMARK; dORIGMARK;
GV *gv;
IO *io;
register PerlIO *fp;
MAGIC *mg;
STRLEN n_a;
if (PL_op->op_flags & OPf_STACKED)
gv = (GV*)*++MARK;
else
gv = PL_defoutgv;
if ((mg = SvTIED_mg((SV*)gv, 'q'))) {
had_magic:
if (MARK == ORIGMARK) {
/* If using default handle then we need to make space to
* pass object as 1st arg, so move other args up ...
*/
MEXTEND(SP, 1);
++MARK;
Move(MARK, MARK + 1, (SP - MARK) + 1, SV*);
++SP;
}
PUSHMARK(MARK - 1);
*MARK = SvTIED_obj((SV*)gv, mg);
PUTBACK;
ENTER;
call_method("PRINT", G_SCALAR);
LEAVE;
SPAGAIN;
MARK = ORIGMARK + 1;
*MARK = *SP;
SP = MARK;
RETURN;
}
if (!(io = GvIO(gv))) {
if ((GvEGV(gv)) && (mg = SvTIED_mg((SV*)GvEGV(gv),'q')))
goto had_magic;
if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
report_evil_fh(gv, io, PL_op->op_type);
SETERRNO(EBADF,RMS$_IFI);
goto just_say_no;
}
else if (!(fp = IoOFP(io))) {
if (ckWARN2(WARN_CLOSED, WARN_IO)) {
if (IoIFP(io)) {
/* integrate with report_evil_fh()? */
char *name = NULL;
if (isGV(gv)) {
SV* sv = sv_newmortal();
gv_efullname4(sv, gv, Nullch, FALSE);
name = SvPV_nolen(sv);
}
if (name && *name)
Perl_warner(aTHX_ WARN_IO,
"Filehandle %s opened only for input", name);
else
Perl_warner(aTHX_ WARN_IO,
"Filehandle opened only for input");
}
else if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
report_evil_fh(gv, io, PL_op->op_type);
}
SETERRNO(EBADF,IoIFP(io)?RMS$_FAC:RMS$_IFI);
goto just_say_no;
}
else {
MARK++;
if (PL_ofslen) {
while (MARK <= SP) {
if (!do_print(*MARK, fp))
break;
MARK++;
if (MARK <= SP) {
if (PerlIO_write(fp, PL_ofs, PL_ofslen) == 0 || PerlIO_error(fp)) {
MARK--;
break;
}
}
}
}
else {
while (MARK <= SP) {
if (!do_print(*MARK, fp))
break;
MARK++;
}
}
if (MARK <= SP)
goto just_say_no;
else {
if (PL_orslen)
if (PerlIO_write(fp, PL_ors, PL_orslen) == 0 || PerlIO_error(fp))
goto just_say_no;
if (IoFLAGS(io) & IOf_FLUSH)
if (PerlIO_flush(fp) == EOF)
goto just_say_no;
}
}
SP = ORIGMARK;
PUSHs(&PL_sv_yes);
RETURN;
just_say_no:
SP = ORIGMARK;
PUSHs(&PL_sv_undef);
RETURN;
}
PP(pp_rv2av)
{
dSP; dTOPss;
AV *av;
if (SvROK(sv)) {
wasref:
tryAMAGICunDEREF(to_av);
av = (AV*)SvRV(sv);
if (SvTYPE(av) != SVt_PVAV)
DIE(aTHX_ "Not an ARRAY reference");
if (PL_op->op_flags & OPf_REF) {
SETs((SV*)av);
RETURN;
}
else if (LVRET) {
if (GIMME == G_SCALAR)
Perl_croak(aTHX_ "Can't return array to lvalue scalar context");
SETs((SV*)av);
RETURN;
}
}
else {
if (SvTYPE(sv) == SVt_PVAV) {
av = (AV*)sv;
if (PL_op->op_flags & OPf_REF) {
SETs((SV*)av);
RETURN;
}
else if (LVRET) {
if (GIMME == G_SCALAR)
Perl_croak(aTHX_ "Can't return array to lvalue"
" scalar context");
SETs((SV*)av);
RETURN;
}
}
else {
GV *gv;
if (SvTYPE(sv) != SVt_PVGV) {
char *sym;
STRLEN len;
if (SvGMAGICAL(sv)) {
mg_get(sv);
if (SvROK(sv))
goto wasref;
}
if (!SvOK(sv)) {
if (PL_op->op_flags & OPf_REF ||
PL_op->op_private & HINT_STRICT_REFS)
DIE(aTHX_ PL_no_usym, "an ARRAY");
if (ckWARN(WARN_UNINITIALIZED))
report_uninit();
if (GIMME == G_ARRAY) {
(void)POPs;
RETURN;
}
RETSETUNDEF;
}
sym = SvPV(sv,len);
if ((PL_op->op_flags & OPf_SPECIAL) &&
!(PL_op->op_flags & OPf_MOD))
{
gv = (GV*)gv_fetchpv(sym, FALSE, SVt_PVAV);
if (!gv
&& (!is_gv_magical(sym,len,0)
|| !(gv = (GV*)gv_fetchpv(sym, TRUE, SVt_PVAV))))
{
RETSETUNDEF;
}
}
else {
if (PL_op->op_private & HINT_STRICT_REFS)
DIE(aTHX_ PL_no_symref, sym, "an ARRAY");
gv = (GV*)gv_fetchpv(sym, TRUE, SVt_PVAV);
}
}
else {
gv = (GV*)sv;
}
av = GvAVn(gv);
if (PL_op->op_private & OPpLVAL_INTRO)
av = save_ary(gv);
if (PL_op->op_flags & OPf_REF) {
SETs((SV*)av);
RETURN;
}
else if (LVRET) {
if (GIMME == G_SCALAR)
Perl_croak(aTHX_ "Can't return array to lvalue"
" scalar context");
SETs((SV*)av);
RETURN;
}
}
}
if (GIMME == G_ARRAY) {
I32 maxarg = AvFILL(av) + 1;
(void)POPs; /* XXXX May be optimized away? */
EXTEND(SP, maxarg);
if (SvRMAGICAL(av)) {
U32 i;
for (i=0; i < maxarg; i++) {
SV **svp = av_fetch(av, i, FALSE);
SP[i+1] = (svp) ? *svp : &PL_sv_undef;
}
}
else {
Copy(AvARRAY(av), SP+1, maxarg, SV*);
}
SP += maxarg;
}
else {
dTARGET;
I32 maxarg = AvFILL(av) + 1;
SETi(maxarg);
}
RETURN;
}
PP(pp_rv2hv)
{
dSP; dTOPss;
HV *hv;
if (SvROK(sv)) {
wasref:
tryAMAGICunDEREF(to_hv);
hv = (HV*)SvRV(sv);
if (SvTYPE(hv) != SVt_PVHV && SvTYPE(hv) != SVt_PVAV)
DIE(aTHX_ "Not a HASH reference");
if (PL_op->op_flags & OPf_REF) {
SETs((SV*)hv);
RETURN;
}
else if (LVRET) {
if (GIMME == G_SCALAR)
Perl_croak(aTHX_ "Can't return hash to lvalue scalar context");
SETs((SV*)hv);
RETURN;
}
}
else {
if (SvTYPE(sv) == SVt_PVHV || SvTYPE(sv) == SVt_PVAV) {
hv = (HV*)sv;
if (PL_op->op_flags & OPf_REF) {
SETs((SV*)hv);
RETURN;
}
else if (LVRET) {
if (GIMME == G_SCALAR)
Perl_croak(aTHX_ "Can't return hash to lvalue"
" scalar context");
SETs((SV*)hv);
RETURN;
}
}
else {
GV *gv;
if (SvTYPE(sv) != SVt_PVGV) {
char *sym;
STRLEN len;
if (SvGMAGICAL(sv)) {
mg_get(sv);
if (SvROK(sv))
goto wasref;
}
if (!SvOK(sv)) {
if (PL_op->op_flags & OPf_REF ||
PL_op->op_private & HINT_STRICT_REFS)
DIE(aTHX_ PL_no_usym, "a HASH");
if (ckWARN(WARN_UNINITIALIZED))
report_uninit();
if (GIMME == G_ARRAY) {
SP--;
RETURN;
}
RETSETUNDEF;
}
sym = SvPV(sv,len);
if ((PL_op->op_flags & OPf_SPECIAL) &&
!(PL_op->op_flags & OPf_MOD))
{
gv = (GV*)gv_fetchpv(sym, FALSE, SVt_PVHV);
if (!gv
&& (!is_gv_magical(sym,len,0)
|| !(gv = (GV*)gv_fetchpv(sym, TRUE, SVt_PVHV))))
{
RETSETUNDEF;
}
}
else {
if (PL_op->op_private & HINT_STRICT_REFS)
DIE(aTHX_ PL_no_symref, sym, "a HASH");
gv = (GV*)gv_fetchpv(sym, TRUE, SVt_PVHV);
}
}
else {
gv = (GV*)sv;
}
hv = GvHVn(gv);
if (PL_op->op_private & OPpLVAL_INTRO)
hv = save_hash(gv);
if (PL_op->op_flags & OPf_REF) {
SETs((SV*)hv);
RETURN;
}
else if (LVRET) {
if (GIMME == G_SCALAR)
Perl_croak(aTHX_ "Can't return hash to lvalue"
" scalar context");
SETs((SV*)hv);
RETURN;
}
}
}
if (GIMME == G_ARRAY) { /* array wanted */
*PL_stack_sp = (SV*)hv;
return do_kv();
}
else {
dTARGET;
if (SvTYPE(hv) == SVt_PVAV)
hv = avhv_keys((AV*)hv);
if (HvFILL(hv))
Perl_sv_setpvf(aTHX_ TARG, "%"IVdf"/%"IVdf,
(IV)HvFILL(hv), (IV)HvMAX(hv) + 1);
else
sv_setiv(TARG, 0);
SETTARG;
RETURN;
}
}
STATIC int
S_do_maybe_phash(pTHX_ AV *ary, SV **lelem, SV **firstlelem, SV **relem,
SV **lastrelem)
{
OP *leftop;
I32 i;
leftop = ((BINOP*)PL_op)->op_last;
assert(leftop);
assert(leftop->op_type == OP_NULL && leftop->op_targ == OP_LIST);
leftop = ((LISTOP*)leftop)->op_first;
assert(leftop);
/* Skip PUSHMARK and each element already assigned to. */
for (i = lelem - firstlelem; i > 0; i--) {
leftop = leftop->op_sibling;
assert(leftop);
}
if (leftop->op_type != OP_RV2HV)
return 0;
/* pseudohash */
if (av_len(ary) > 0)
av_fill(ary, 0); /* clear all but the fields hash */
if (lastrelem >= relem) {
while (relem < lastrelem) { /* gobble up all the rest */
SV *tmpstr;
assert(relem[0]);
assert(relem[1]);
/* Avoid a memory leak when avhv_store_ent dies. */
tmpstr = sv_newmortal();
sv_setsv(tmpstr,relem[1]); /* value */
relem[1] = tmpstr;
if (avhv_store_ent(ary,relem[0],tmpstr,0))
(void)SvREFCNT_inc(tmpstr);
if (SvMAGICAL(ary) != 0 && SvSMAGICAL(tmpstr))
mg_set(tmpstr);
relem += 2;
TAINT_NOT;
}
}
if (relem == lastrelem)
return 1;
return 2;
}
STATIC void
S_do_oddball(pTHX_ HV *hash, SV **relem, SV **firstrelem)
{
if (*relem) {
SV *tmpstr;
if (ckWARN(WARN_MISC)) {
if (relem == firstrelem &&
SvROK(*relem) &&
(SvTYPE(SvRV(*relem)) == SVt_PVAV ||
SvTYPE(SvRV(*relem)) == SVt_PVHV))
{
Perl_warner(aTHX_ WARN_MISC,
"Reference found where even-sized list expected");
}
else
Perl_warner(aTHX_ WARN_MISC,
"Odd number of elements in hash assignment");
}
if (SvTYPE(hash) == SVt_PVAV) {
/* pseudohash */
tmpstr = sv_newmortal();
if (avhv_store_ent((AV*)hash,*relem,tmpstr,0))
(void)SvREFCNT_inc(tmpstr);
if (SvMAGICAL(hash) && SvSMAGICAL(tmpstr))
mg_set(tmpstr);
}
else {
HE *didstore;
tmpstr = NEWSV(29,0);
didstore = hv_store_ent(hash,*relem,tmpstr,0);
if (SvMAGICAL(hash)) {
if (SvSMAGICAL(tmpstr))
mg_set(tmpstr);
if (!didstore)
sv_2mortal(tmpstr);
}
}
TAINT_NOT;
}
}
PP(pp_aassign)
{
dSP;
SV **lastlelem = PL_stack_sp;
SV **lastrelem = PL_stack_base + POPMARK;
SV **firstrelem = PL_stack_base + POPMARK + 1;
SV **firstlelem = lastrelem + 1;
register SV **relem;
register SV **lelem;
register SV *sv;
register AV *ary;
I32 gimme;
HV *hash;
I32 i;
int magic;
PL_delaymagic = DM_DELAY; /* catch simultaneous items */
/* If there's a common identifier on both sides we have to take
* special care that assigning the identifier on the left doesn't
* clobber a value on the right that's used later in the list.
*/
if (PL_op->op_private & (OPpASSIGN_COMMON)) {
EXTEND_MORTAL(lastrelem - firstrelem + 1);
for (relem = firstrelem; relem <= lastrelem; relem++) {
/*SUPPRESS 560*/
if ((sv = *relem)) {
TAINT_NOT; /* Each item is independent */
*relem = sv_mortalcopy(sv);
}
}
}
relem = firstrelem;
lelem = firstlelem;
ary = Null(AV*);
hash = Null(HV*);
while (lelem <= lastlelem) {
TAINT_NOT; /* Each item stands on its own, taintwise. */
sv = *lelem++;
switch (SvTYPE(sv)) {
case SVt_PVAV:
ary = (AV*)sv;
magic = SvMAGICAL(ary) != 0;
if (PL_op->op_private & OPpASSIGN_HASH) {
switch (do_maybe_phash(ary, lelem, firstlelem, relem,
lastrelem))
{
case 0:
goto normal_array;
case 1:
do_oddball((HV*)ary, relem, firstrelem);
}
relem = lastrelem + 1;
break;
}
normal_array:
av_clear(ary);
av_extend(ary, lastrelem - relem);
i = 0;
while (relem <= lastrelem) { /* gobble up all the rest */
SV **didstore;
sv = NEWSV(28,0);
assert(*relem);
sv_setsv(sv,*relem);
*(relem++) = sv;
didstore = av_store(ary,i++,sv);
if (magic) {
if (SvSMAGICAL(sv))
mg_set(sv);
if (!didstore)
sv_2mortal(sv);
}
TAINT_NOT;
}
break;
case SVt_PVHV: { /* normal hash */
SV *tmpstr;
hash = (HV*)sv;
magic = SvMAGICAL(hash) != 0;
hv_clear(hash);
while (relem < lastrelem) { /* gobble up all the rest */
HE *didstore;
if (*relem)
sv = *(relem++);
else
sv = &PL_sv_no, relem++;
tmpstr = NEWSV(29,0);
if (*relem)
sv_setsv(tmpstr,*relem); /* value */
*(relem++) = tmpstr;
didstore = hv_store_ent(hash,sv,tmpstr,0);
if (magic) {
if (SvSMAGICAL(tmpstr))
mg_set(tmpstr);
if (!didstore)
sv_2mortal(tmpstr);
}
TAINT_NOT;
}
if (relem == lastrelem) {
do_oddball(hash, relem, firstrelem);
relem++;
}
}
break;
default:
if (SvIMMORTAL(sv)) {
if (relem <= lastrelem)
relem++;
break;
}
if (relem <= lastrelem) {
sv_setsv(sv, *relem);
*(relem++) = sv;
}
else
sv_setsv(sv, &PL_sv_undef);
SvSETMAGIC(sv);
break;
}
}
if (PL_delaymagic & ~DM_DELAY) {
if (PL_delaymagic & DM_UID) {
#ifdef HAS_SETRESUID
(void)setresuid(PL_uid,PL_euid,(Uid_t)-1);
#else
# ifdef HAS_SETREUID
(void)setreuid(PL_uid,PL_euid);
# else
# ifdef HAS_SETRUID
if ((PL_delaymagic & DM_UID) == DM_RUID) {
(void)setruid(PL_uid);
PL_delaymagic &= ~DM_RUID;
}
# endif /* HAS_SETRUID */
# ifdef HAS_SETEUID
if ((PL_delaymagic & DM_UID) == DM_EUID) {
(void)seteuid(PL_uid);
PL_delaymagic &= ~DM_EUID;
}
# endif /* HAS_SETEUID */
if (PL_delaymagic & DM_UID) {
if (PL_uid != PL_euid)
DIE(aTHX_ "No setreuid available");
(void)PerlProc_setuid(PL_uid);
}
# endif /* HAS_SETREUID */
#endif /* HAS_SETRESUID */
PL_uid = PerlProc_getuid();
PL_euid = PerlProc_geteuid();
}
if (PL_delaymagic & DM_GID) {
#ifdef HAS_SETRESGID
(void)setresgid(PL_gid,PL_egid,(Gid_t)-1);
#else
# ifdef HAS_SETREGID
(void)setregid(PL_gid,PL_egid);
# else
# ifdef HAS_SETRGID
if ((PL_delaymagic & DM_GID) == DM_RGID) {
(void)setrgid(PL_gid);
PL_delaymagic &= ~DM_RGID;
}
# endif /* HAS_SETRGID */
# ifdef HAS_SETEGID
if ((PL_delaymagic & DM_GID) == DM_EGID) {
(void)setegid(PL_gid);
PL_delaymagic &= ~DM_EGID;
}
# endif /* HAS_SETEGID */
if (PL_delaymagic & DM_GID) {
if (PL_gid != PL_egid)
DIE(aTHX_ "No setregid available");
(void)PerlProc_setgid(PL_gid);
}
# endif /* HAS_SETREGID */
#endif /* HAS_SETRESGID */
PL_gid = PerlProc_getgid();
PL_egid = PerlProc_getegid();
}
PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
}
PL_delaymagic = 0;
gimme = GIMME_V;
if (gimme == G_VOID)
SP = firstrelem - 1;
else if (gimme == G_SCALAR) {
dTARGET;
SP = firstrelem;
SETi(lastrelem - firstrelem + 1);
}
else {
if (ary || hash)
SP = lastrelem;
else
SP = firstrelem + (lastlelem - firstlelem);
lelem = firstlelem + (relem - firstrelem);
while (relem <= SP)
*relem++ = (lelem <= lastlelem) ? *lelem++ : &PL_sv_undef;
}
RETURN;
}
PP(pp_qr)
{
dSP;
register PMOP *pm = cPMOP;
SV *rv = sv_newmortal();
SV *sv = newSVrv(rv, "Regexp");
sv_magic(sv,(SV*)ReREFCNT_inc(pm->op_pmregexp),'r',0,0);
RETURNX(PUSHs(rv));
}
PP(pp_match)
{
dSP; dTARG;
register PMOP *pm = cPMOP;
register char *t;
register char *s;
char *strend;
I32 global;
I32 r_flags = REXEC_CHECKED;
char *truebase; /* Start of string */
register REGEXP *rx = pm->op_pmregexp;
bool rxtainted;
I32 gimme = GIMME;
STRLEN len;
I32 minmatch = 0;
I32 oldsave = PL_savestack_ix;
I32 update_minmatch = 1;
I32 had_zerolen = 0;
if (PL_op->op_flags & OPf_STACKED)
TARG = POPs;
else {
TARG = DEFSV;
EXTEND(SP,1);
}
PUTBACK; /* EVAL blocks need stack_sp. */
s = SvPV(TARG, len);
strend = s + len;
if (!s)
DIE(aTHX_ "panic: pp_match");
rxtainted = ((pm->op_pmdynflags & PMdf_TAINTED) ||
(PL_tainted && (pm->op_pmflags & PMf_RETAINT)));
TAINT_NOT;
if (pm->op_pmdynflags & PMdf_USED) {
failure:
if (gimme == G_ARRAY)
RETURN;
RETPUSHNO;
}
if (!rx->prelen && PL_curpm) {
pm = PL_curpm;
rx = pm->op_pmregexp;
}
if (rx->minlen > len) goto failure;
truebase = t = s;
/* XXXX What part of this is needed with true \G-support? */
if ((global = pm->op_pmflags & PMf_GLOBAL)) {
rx->startp[0] = -1;
if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
MAGIC* mg = mg_find(TARG, 'g');
if (mg && mg->mg_len >= 0) {
if (!(rx->reganch & ROPT_GPOS_SEEN))
rx->endp[0] = rx->startp[0] = mg->mg_len;
else if (rx->reganch & ROPT_ANCH_GPOS) {
r_flags |= REXEC_IGNOREPOS;
rx->endp[0] = rx->startp[0] = mg->mg_len;
}
minmatch = (mg->mg_flags & MGf_MINMATCH);
update_minmatch = 0;
}
}
}
if ((!global && rx->nparens)
|| SvTEMP(TARG) || PL_sawampersand)
r_flags |= REXEC_COPY_STR;
if (SvSCREAM(TARG))
r_flags |= REXEC_SCREAM;
if (pm->op_pmflags & (PMf_MULTILINE|PMf_SINGLELINE)) {
SAVEINT(PL_multiline);
PL_multiline = pm->op_pmflags & PMf_MULTILINE;
}
play_it_again:
if (global && rx->startp[0] != -1) {
t = s = rx->endp[0] + truebase;
if ((s + rx->minlen) > strend)
goto nope;
if (update_minmatch++)
minmatch = had_zerolen;
}
if (rx->reganch & RE_USE_INTUIT &&
DO_UTF8(TARG) == ((rx->reganch & ROPT_UTF8) != 0)) {
s = CALLREG_INTUIT_START(aTHX_ rx, TARG, s, strend, r_flags, NULL);
if (!s)
goto nope;
if ( (rx->reganch & ROPT_CHECK_ALL)
&& !PL_sawampersand
&& ((rx->reganch & ROPT_NOSCAN)
|| !((rx->reganch & RE_INTUIT_TAIL)
&& (r_flags & REXEC_SCREAM)))
&& !SvROK(TARG)) /* Cannot trust since INTUIT cannot guess ^ */
goto yup;
}
if (CALLREGEXEC(aTHX_ rx, s, strend, truebase, minmatch, TARG, NULL, r_flags))
{
PL_curpm = pm;
if (pm->op_pmflags & PMf_ONCE)
pm->op_pmdynflags |= PMdf_USED;
goto gotcha;
}
else
goto ret_no;
/*NOTREACHED*/
gotcha:
if (rxtainted)
RX_MATCH_TAINTED_on(rx);
TAINT_IF(RX_MATCH_TAINTED(rx));
if (gimme == G_ARRAY) {
I32 iters, i, len;
iters = rx->nparens;
if (global && !iters)
i = 1;
else
i = 0;
SPAGAIN; /* EVAL blocks could move the stack. */
EXTEND(SP, iters + i);
EXTEND_MORTAL(iters + i);
for (i = !i; i <= iters; i++) {
PUSHs(sv_newmortal());
/*SUPPRESS 560*/
if ((rx->startp[i] != -1) && rx->endp[i] != -1 ) {
len = rx->endp[i] - rx->startp[i];
s = rx->startp[i] + truebase;
sv_setpvn(*SP, s, len);
if ((pm->op_pmdynflags & PMdf_UTF8) && !IN_BYTE) {
SvUTF8_on(*SP);
sv_utf8_downgrade(*SP, TRUE);
}
}
}
if (global) {
had_zerolen = (rx->startp[0] != -1
&& rx->startp[0] == rx->endp[0]);
PUTBACK; /* EVAL blocks may use stack */
r_flags |= REXEC_IGNOREPOS | REXEC_NOT_FIRST;
goto play_it_again;
}
else if (!iters)
XPUSHs(&PL_sv_yes);
LEAVE_SCOPE(oldsave);
RETURN;
}
else {
if (global) {
MAGIC* mg = 0;
if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG))
mg = mg_find(TARG, 'g');
if (!mg) {
sv_magic(TARG, (SV*)0, 'g', Nullch, 0);
mg = mg_find(TARG, 'g');
}
if (rx->startp[0] != -1) {
mg->mg_len = rx->endp[0];
if (rx->startp[0] == rx->endp[0])
mg->mg_flags |= MGf_MINMATCH;
else
mg->mg_flags &= ~MGf_MINMATCH;
}
}
LEAVE_SCOPE(oldsave);
RETPUSHYES;
}
yup: /* Confirmed by INTUIT */
if (rxtainted)
RX_MATCH_TAINTED_on(rx);
TAINT_IF(RX_MATCH_TAINTED(rx));
PL_curpm = pm;
if (pm->op_pmflags & PMf_ONCE)
pm->op_pmdynflags |= PMdf_USED;
if (RX_MATCH_COPIED(rx))
Safefree(rx->subbeg);
RX_MATCH_COPIED_off(rx);
rx->subbeg = Nullch;
if (global) {
rx->subbeg = truebase;
rx->startp[0] = s - truebase;
rx->endp[0] = s - truebase + rx->minlen;
rx->sublen = strend - truebase;
goto gotcha;
}
if (PL_sawampersand) {
I32 off;
rx->subbeg = savepvn(t, strend - t);
rx->sublen = strend - t;
RX_MATCH_COPIED_on(rx);
off = rx->startp[0] = s - t;
rx->endp[0] = off + rx->minlen;
}
else { /* startp/endp are used by @- @+. */
rx->startp[0] = s - truebase;
rx->endp[0] = s - truebase + rx->minlen;
}
rx->nparens = rx->lastparen = 0; /* used by @- and @+ */
LEAVE_SCOPE(oldsave);
RETPUSHYES;
nope:
ret_no:
if (global && !(pm->op_pmflags & PMf_CONTINUE)) {
if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
MAGIC* mg = mg_find(TARG, 'g');
if (mg)
mg->mg_len = -1;
}
}
LEAVE_SCOPE(oldsave);
if (gimme == G_ARRAY)
RETURN;
RETPUSHNO;
}
OP *
Perl_do_readline(pTHX)
{
dSP; dTARGETSTACKED;
register SV *sv;
STRLEN tmplen = 0;
STRLEN offset;
PerlIO *fp;
register IO *io = GvIO(PL_last_in_gv);
register I32 type = PL_op->op_type;
I32 gimme = GIMME_V;
MAGIC *mg;
if ((mg = SvTIED_mg((SV*)PL_last_in_gv, 'q'))) {
PUSHMARK(SP);
XPUSHs(SvTIED_obj((SV*)PL_last_in_gv, mg));
PUTBACK;
ENTER;
call_method("READLINE", gimme);
LEAVE;
SPAGAIN;
if (gimme == G_SCALAR)
SvSetMagicSV_nosteal(TARG, TOPs);
RETURN;
}
fp = Nullfp;
if (io) {
fp = IoIFP(io);
if (!fp) {
if (IoFLAGS(io) & IOf_ARGV) {
if (IoFLAGS(io) & IOf_START) {
IoLINES(io) = 0;
if (av_len(GvAVn(PL_last_in_gv)) < 0) {
IoFLAGS(io) &= ~IOf_START;
do_open(PL_last_in_gv,"-",1,FALSE,O_RDONLY,0,Nullfp);
sv_setpvn(GvSV(PL_last_in_gv), "-", 1);
SvSETMAGIC(GvSV(PL_last_in_gv));
fp = IoIFP(io);
goto have_fp;
}
}
fp = nextargv(PL_last_in_gv);
if (!fp) { /* Note: fp != IoIFP(io) */
(void)do_close(PL_last_in_gv, FALSE); /* now it does*/
}
}
else if (type == OP_GLOB) {
SV *tmpcmd = NEWSV(55, 0);
SV *tmpglob = POPs;
ENTER;
SAVEFREESV(tmpcmd);
#ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
/* since spawning off a process is a real performance hit */
{
#include <descrip.h>
#include <lib$routines.h>
#include <nam.h>
#include <rmsdef.h>
char rslt[NAM$C_MAXRSS+1+sizeof(unsigned short int)] = {'\0','\0'};
char vmsspec[NAM$C_MAXRSS+1];
char *rstr = rslt + sizeof(unsigned short int), *begin, *end, *cp;
char tmpfnam[L_tmpnam] = "SYS$SCRATCH:";
$DESCRIPTOR(dfltdsc,"SYS$DISK:[]*.*;");
PerlIO *tmpfp;
STRLEN i;
struct dsc$descriptor_s wilddsc
= {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
struct dsc$descriptor_vs rsdsc
= {sizeof rslt, DSC$K_DTYPE_VT, DSC$K_CLASS_VS, rslt};
unsigned long int cxt = 0, sts = 0, ok = 1, hasdir = 0, hasver = 0, isunix = 0;
/* We could find out if there's an explicit dev/dir or version
by peeking into lib$find_file's internal context at
((struct NAM *)((struct FAB *)cxt)->fab$l_nam)->nam$l_fnb
but that's unsupported, so I don't want to do it now and
have it bite someone in the future. */
strcat(tmpfnam,PerlLIO_tmpnam(NULL));
cp = SvPV(tmpglob,i);
for (; i; i--) {
if (cp[i] == ';') hasver = 1;
if (cp[i] == '.') {
if (sts) hasver = 1;
else sts = 1;
}
if (cp[i] == '/') {
hasdir = isunix = 1;
break;
}
if (cp[i] == ']' || cp[i] == '>' || cp[i] == ':') {
hasdir = 1;
break;
}
}
if ((tmpfp = PerlIO_open(tmpfnam,"w+","fop=dlt")) != NULL) {
Stat_t st;
if (!PerlLIO_stat(SvPVX(tmpglob),&st) && S_ISDIR(st.st_mode))
ok = ((wilddsc.dsc$a_pointer = tovmspath(SvPVX(tmpglob),vmsspec)) != NULL);
else ok = ((wilddsc.dsc$a_pointer = tovmsspec(SvPVX(tmpglob),vmsspec)) != NULL);
if (ok) wilddsc.dsc$w_length = (unsigned short int) strlen(wilddsc.dsc$a_pointer);
while (ok && ((sts = lib$find_file(&wilddsc,&rsdsc,&cxt,
&dfltdsc,NULL,NULL,NULL))&1)) {
end = rstr + (unsigned long int) *rslt;
if (!hasver) while (*end != ';') end--;
*(end++) = '\n'; *end = '\0';
for (cp = rstr; *cp; cp++) *cp = _tolower(*cp);
if (hasdir) {
if (isunix) trim_unixpath(rstr,SvPVX(tmpglob),1);
begin = rstr;
}
else {
begin = end;
while (*(--begin) != ']' && *begin != '>') ;
++begin;
}
ok = (PerlIO_puts(tmpfp,begin) != EOF);
}
if (cxt) (void)lib$find_file_end(&cxt);
if (ok && sts != RMS$_NMF &&
sts != RMS$_DNF && sts != RMS$_FNF) ok = 0;
if (!ok) {
if (!(sts & 1)) {
SETERRNO((sts == RMS$_SYN ? EINVAL : EVMSERR),sts);
}
PerlIO_close(tmpfp);
fp = NULL;
}
else {
PerlIO_rewind(tmpfp);
IoTYPE(io) = IoTYPE_RDONLY;
IoIFP(io) = fp = tmpfp;
IoFLAGS(io) &= ~IOf_UNTAINT; /* maybe redundant */
}
}
}
#else /* !VMS */
#ifdef MACOS_TRADITIONAL
sv_setpv(tmpcmd, "glob ");
sv_catsv(tmpcmd, tmpglob);
sv_catpv(tmpcmd, " |");
#else
#ifdef DOSISH
#ifdef OS2
sv_setpv(tmpcmd, "for a in ");
sv_catsv(tmpcmd, tmpglob);
sv_catpv(tmpcmd, "; do echo \"$a\\0\\c\"; done |");
#else
#ifdef DJGPP
sv_setpv(tmpcmd, "/dev/dosglob/"); /* File System Extension */
sv_catsv(tmpcmd, tmpglob);
#else
sv_setpv(tmpcmd, "perlglob ");
sv_catsv(tmpcmd, tmpglob);
sv_catpv(tmpcmd, " |");
#endif /* !DJGPP */
#endif /* !OS2 */
#else /* !DOSISH */
#if defined(CSH)
sv_setpvn(tmpcmd, PL_cshname, PL_cshlen);
sv_catpv(tmpcmd, " -cf 'set nonomatch; glob ");
sv_catsv(tmpcmd, tmpglob);
sv_catpv(tmpcmd, "' 2>/dev/null |");
#else
sv_setpv(tmpcmd, "echo ");
sv_catsv(tmpcmd, tmpglob);
#if 'z' - 'a' == 25
sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\012\\012\\012\\012'|");
#else
sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
#endif
#endif /* !CSH */
#endif /* !DOSISH */
#endif /* MACOS_TRADITIONAL */
(void)do_open(PL_last_in_gv, SvPVX(tmpcmd), SvCUR(tmpcmd),
FALSE, O_RDONLY, 0, Nullfp);
fp = IoIFP(io);
#endif /* !VMS */
LEAVE;
}
}
else if (type == OP_GLOB)
SP--;
else if (ckWARN(WARN_IO) /* stdout/stderr or other write fh */
&& (IoTYPE(io) == IoTYPE_WRONLY || fp == PerlIO_stdout()
|| fp == PerlIO_stderr()))
{
/* integrate with report_evil_fh()? */
char *name = NULL;
if (isGV(PL_last_in_gv)) { /* can this ever fail? */
SV* sv = sv_newmortal();
gv_efullname4(sv, PL_last_in_gv, Nullch, FALSE);
name = SvPV_nolen(sv);
}
if (name && *name)
Perl_warner(aTHX_ WARN_IO,
"Filehandle %s opened only for output", name);
else
Perl_warner(aTHX_ WARN_IO,
"Filehandle opened only for output");
}
}
if (!fp) {
if (ckWARN2(WARN_GLOB, WARN_CLOSED)
&& (!io || !(IoFLAGS(io) & IOf_START))) {
if (type == OP_GLOB)
Perl_warner(aTHX_ WARN_GLOB,
"glob failed (can't start child: %s)",
Strerror(errno));
else
report_evil_fh(PL_last_in_gv, io, PL_op->op_type);
}
if (gimme == G_SCALAR) {
(void)SvOK_off(TARG);
PUSHTARG;
}
RETURN;
}
have_fp:
if (gimme == G_SCALAR) {
sv = TARG;
if (SvROK(sv))
sv_unref(sv);
(void)SvUPGRADE(sv, SVt_PV);
tmplen = SvLEN(sv); /* remember if already alloced */
if (!tmplen)
Sv_Grow(sv, 80); /* try short-buffering it */
if (type == OP_RCATLINE)
offset = SvCUR(sv);
else
offset = 0;
}
else {
sv = sv_2mortal(NEWSV(57, 80));
offset = 0;
}
/* This should not be marked tainted if the fp is marked clean */
#define MAYBE_TAINT_LINE(io, sv) \
if (!(IoFLAGS(io) & IOf_UNTAINT)) { \
TAINT; \
SvTAINTED_on(sv); \
}
/* delay EOF state for a snarfed empty file */
#define SNARF_EOF(gimme,rs,io,sv) \
(gimme != G_SCALAR || SvCUR(sv) \
|| (IoFLAGS(io) & IOf_NOLINE) || !RsSNARF(rs))
for (;;) {
if (!sv_gets(sv, fp, offset)
&& (type == OP_GLOB || SNARF_EOF(gimme, PL_rs, io, sv)))
{
PerlIO_clearerr(fp);
if (IoFLAGS(io) & IOf_ARGV) {
fp = nextargv(PL_last_in_gv);
if (fp)
continue;
(void)do_close(PL_last_in_gv, FALSE);
}
else if (type == OP_GLOB) {
if (!do_close(PL_last_in_gv, FALSE) && ckWARN(WARN_GLOB)) {
Perl_warner(aTHX_ WARN_GLOB,
"glob failed (child exited with status %d%s)",
(int)(STATUS_CURRENT >> 8),
(STATUS_CURRENT & 0x80) ? ", core dumped" : "");
}
}
if (gimme == G_SCALAR) {
(void)SvOK_off(TARG);
PUSHTARG;
}
MAYBE_TAINT_LINE(io, sv);
RETURN;
}
MAYBE_TAINT_LINE(io, sv);
IoLINES(io)++;
IoFLAGS(io) |= IOf_NOLINE;
SvSETMAGIC(sv);
XPUSHs(sv);
if (type == OP_GLOB) {
char *tmps;
if (SvCUR(sv) > 0 && SvCUR(PL_rs) > 0) {
tmps = SvEND(sv) - 1;
if (*tmps == *SvPVX(PL_rs)) {
*tmps = '\0';
SvCUR(sv)--;
}
}
for (tmps = SvPVX(sv); *tmps; tmps++)
if (!isALPHA(*tmps) && !isDIGIT(*tmps) &&
strchr("$&*(){}[]'\";\\|?<>~`", *tmps))
break;
if (*tmps && PerlLIO_lstat(SvPVX(sv), &PL_statbuf) < 0) {
(void)POPs; /* Unmatched wildcard? Chuck it... */
continue;
}
}
if (gimme == G_ARRAY) {
if (SvLEN(sv) - SvCUR(sv) > 20) {
SvLEN_set(sv, SvCUR(sv)+1);
Renew(SvPVX(sv), SvLEN(sv), char);
}
sv = sv_2mortal(NEWSV(58, 80));
continue;
}
else if (gimme == G_SCALAR && !tmplen && SvLEN(sv) - SvCUR(sv) > 80) {
/* try to reclaim a bit of scalar space (only on 1st alloc) */
if (SvCUR(sv) < 60)
SvLEN_set(sv, 80);
else
SvLEN_set(sv, SvCUR(sv)+40); /* allow some slop */
Renew(SvPVX(sv), SvLEN(sv), char);
}
RETURN;
}
}
PP(pp_enter)
{
dSP;
register PERL_CONTEXT *cx;
I32 gimme = OP_GIMME(PL_op, -1);
if (gimme == -1) {
if (cxstack_ix >= 0)
gimme = cxstack[cxstack_ix].blk_gimme;
else
gimme = G_SCALAR;
}
ENTER;
SAVETMPS;
PUSHBLOCK(cx, CXt_BLOCK, SP);
RETURN;
}
PP(pp_helem)
{
dSP;
HE* he;
SV **svp;
SV *keysv = POPs;
HV *hv = (HV*)POPs;
U32 lval = PL_op->op_flags & OPf_MOD || LVRET;
U32 defer = PL_op->op_private & OPpLVAL_DEFER;
SV *sv;
if (SvTYPE(hv) == SVt_PVHV) {
he = hv_fetch_ent(hv, keysv, lval && !defer, 0);
svp = he ? &HeVAL(he) : 0;
}
else if (SvTYPE(hv) == SVt_PVAV) {
if (PL_op->op_private & OPpLVAL_INTRO)
DIE(aTHX_ "Can't localize pseudo-hash element");
svp = avhv_fetch_ent((AV*)hv, keysv, lval && !defer, 0);
}
else {
RETPUSHUNDEF;
}
if (lval) {
if (!svp || *svp == &PL_sv_undef) {
SV* lv;
SV* key2;
if (!defer) {
STRLEN n_a;
DIE(aTHX_ PL_no_helem, SvPV(keysv, n_a));
}
lv = sv_newmortal();
sv_upgrade(lv, SVt_PVLV);
LvTYPE(lv) = 'y';
sv_magic(lv, key2 = newSVsv(keysv), 'y', Nullch, 0);
SvREFCNT_dec(key2); /* sv_magic() increments refcount */
LvTARG(lv) = SvREFCNT_inc(hv);
LvTARGLEN(lv) = 1;
PUSHs(lv);
RETURN;
}
if (PL_op->op_private & OPpLVAL_INTRO) {
if (HvNAME(hv) && isGV(*svp))
save_gp((GV*)*svp, !(PL_op->op_flags & OPf_SPECIAL));
else
save_helem(hv, keysv, svp);
}
else if (PL_op->op_private & OPpDEREF)
vivify_ref(*svp, PL_op->op_private & OPpDEREF);
}
sv = (svp ? *svp : &PL_sv_undef);
/* This makes C<local $tied{foo} = $tied{foo}> possible.
* Pushing the magical RHS on to the stack is useless, since
* that magic is soon destined to be misled by the local(),
* and thus the later pp_sassign() will fail to mg_get() the
* old value. This should also cure problems with delayed
* mg_get()s. GSAR 98-07-03 */
if (!lval && SvGMAGICAL(sv))
sv = sv_mortalcopy(sv);
PUSHs(sv);
RETURN;
}
PP(pp_leave)
{
dSP;
register PERL_CONTEXT *cx;
register SV **mark;
SV **newsp;
PMOP *newpm;
I32 gimme;
if (PL_op->op_flags & OPf_SPECIAL) {
cx = &cxstack[cxstack_ix];
cx->blk_oldpm = PL_curpm; /* fake block should preserve $1 et al */
}
POPBLOCK(cx,newpm);
gimme = OP_GIMME(PL_op, -1);
if (gimme == -1) {
if (cxstack_ix >= 0)
gimme = cxstack[cxstack_ix].blk_gimme;
else
gimme = G_SCALAR;
}
TAINT_NOT;
if (gimme == G_VOID)
SP = newsp;
else if (gimme == G_SCALAR) {
MARK = newsp + 1;
if (MARK <= SP)
if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP))
*MARK = TOPs;
else
*MARK = sv_mortalcopy(TOPs);
else {
MEXTEND(mark,0);
*MARK = &PL_sv_undef;
}
SP = MARK;
}
else if (gimme == G_ARRAY) {
/* in case LEAVE wipes old return values */
for (mark = newsp + 1; mark <= SP; mark++) {
if (!(SvFLAGS(*mark) & (SVs_PADTMP|SVs_TEMP))) {
*mark = sv_mortalcopy(*mark);
TAINT_NOT; /* Each item is independent */
}
}
}
PL_curpm = newpm; /* Don't pop $1 et al till now */
LEAVE;
RETURN;
}
PP(pp_iter)
{
dSP;
register PERL_CONTEXT *cx;
SV* sv;
AV* av;
SV **itersvp;
EXTEND(SP, 1);
cx = &cxstack[cxstack_ix];
if (CxTYPE(cx) != CXt_LOOP)
DIE(aTHX_ "panic: pp_iter");
itersvp = CxITERVAR(cx);
av = cx->blk_loop.iterary;
if (SvTYPE(av) != SVt_PVAV) {
/* iterate ($min .. $max) */
if (cx->blk_loop.iterlval) {
/* string increment */
register SV* cur = cx->blk_loop.iterlval;
STRLEN maxlen;
char *max = SvPV((SV*)av, maxlen);
if (!SvNIOK(cur) && SvCUR(cur) <= maxlen) {
#ifndef USE_THREADS /* don't risk potential race */
if (SvREFCNT(*itersvp) == 1 && !SvMAGICAL(*itersvp)) {
/* safe to reuse old SV */
sv_setsv(*itersvp, cur);
}
else
#endif
{
/* we need a fresh SV every time so that loop body sees a
* completely new SV for closures/references to work as
* they used to */
SvREFCNT_dec(*itersvp);
*itersvp = newSVsv(cur);
}
if (strEQ(SvPVX(cur), max))
sv_setiv(cur, 0); /* terminate next time */
else
sv_inc(cur);
RETPUSHYES;
}
RETPUSHNO;
}
/* integer increment */
if (cx->blk_loop.iterix > cx->blk_loop.itermax)
RETPUSHNO;
#ifndef USE_THREADS /* don't risk potential race */
if (SvREFCNT(*itersvp) == 1 && !SvMAGICAL(*itersvp)) {
/* safe to reuse old SV */
sv_setiv(*itersvp, cx->blk_loop.iterix++);
}
else
#endif
{
/* we need a fresh SV every time so that loop body sees a
* completely new SV for closures/references to work as they
* used to */
SvREFCNT_dec(*itersvp);
*itersvp = newSViv(cx->blk_loop.iterix++);
}
RETPUSHYES;
}
/* iterate array */
if (cx->blk_loop.iterix >= (av == PL_curstack ? cx->blk_oldsp : AvFILL(av)))
RETPUSHNO;
SvREFCNT_dec(*itersvp);
if ((sv = SvMAGICAL(av)
? *av_fetch(av, ++cx->blk_loop.iterix, FALSE)
: AvARRAY(av)[++cx->blk_loop.iterix]))
SvTEMP_off(sv);
else
sv = &PL_sv_undef;
if (av != PL_curstack && SvIMMORTAL(sv)) {
SV *lv = cx->blk_loop.iterlval;
if (lv && SvREFCNT(lv) > 1) {
SvREFCNT_dec(lv);
lv = Nullsv;
}
if (lv)
SvREFCNT_dec(LvTARG(lv));
else {
lv = cx->blk_loop.iterlval = NEWSV(26, 0);
sv_upgrade(lv, SVt_PVLV);
LvTYPE(lv) = 'y';
sv_magic(lv, Nullsv, 'y', Nullch, 0);
}
LvTARG(lv) = SvREFCNT_inc(av);
LvTARGOFF(lv) = cx->blk_loop.iterix;
LvTARGLEN(lv) = (STRLEN)UV_MAX;
sv = (SV*)lv;
}
*itersvp = SvREFCNT_inc(sv);
RETPUSHYES;
}
PP(pp_subst)
{
dSP; dTARG;
register PMOP *pm = cPMOP;
PMOP *rpm = pm;
register SV *dstr, *rstr;
register char *s;
char *strend;
register char *m;
char *c;
register char *d;
STRLEN clen;
I32 iters = 0;
I32 maxiters;
register I32 i;
bool once;
bool rxtainted;
char *orig;
I32 r_flags;
register REGEXP *rx = pm->op_pmregexp;
STRLEN len;
int force_on_match = 0;
I32 oldsave = PL_savestack_ix;
bool do_utf8;
STRLEN slen;
/* known replacement string? */
rstr = (pm->op_pmflags & PMf_CONST) ? POPs : Nullsv;
if (PL_op->op_flags & OPf_STACKED)
TARG = POPs;
else {
TARG = DEFSV;
EXTEND(SP,1);
}
do_utf8 = DO_UTF8(TARG);
if (SvFAKE(TARG) && SvREADONLY(TARG))
sv_force_normal(TARG);
if (SvREADONLY(TARG)
|| (SvTYPE(TARG) > SVt_PVLV
&& !(SvTYPE(TARG) == SVt_PVGV && SvFAKE(TARG))))
DIE(aTHX_ PL_no_modify);
PUTBACK;
s = SvPV(TARG, len);
if (!SvPOKp(TARG) || SvTYPE(TARG) == SVt_PVGV)
force_on_match = 1;
rxtainted = ((pm->op_pmdynflags & PMdf_TAINTED) ||
(PL_tainted && (pm->op_pmflags & PMf_RETAINT)));
if (PL_tainted)
rxtainted |= 2;
TAINT_NOT;
force_it:
if (!pm || !s)
DIE(aTHX_ "panic: pp_subst");
strend = s + len;
slen = do_utf8 ? utf8_length((U8*)s, (U8*)strend) : len;
maxiters = 2 * slen + 10; /* We can match twice at each
position, once with zero-length,
second time with non-zero. */
if (!rx->prelen && PL_curpm) {
pm = PL_curpm;
rx = pm->op_pmregexp;
}
r_flags = (rx->nparens || SvTEMP(TARG) || PL_sawampersand)
? REXEC_COPY_STR : 0;
if (SvSCREAM(TARG))
r_flags |= REXEC_SCREAM;
if (pm->op_pmflags & (PMf_MULTILINE|PMf_SINGLELINE)) {
SAVEINT(PL_multiline);
PL_multiline = pm->op_pmflags & PMf_MULTILINE;
}
orig = m = s;
if (rx->reganch & RE_USE_INTUIT) {
s = CALLREG_INTUIT_START(aTHX_ rx, TARG, s, strend, r_flags, NULL);
if (!s)
goto nope;
/* How to do it in subst? */
/* if ( (rx->reganch & ROPT_CHECK_ALL)
&& !PL_sawampersand
&& ((rx->reganch & ROPT_NOSCAN)
|| !((rx->reganch & RE_INTUIT_TAIL)
&& (r_flags & REXEC_SCREAM))))
goto yup;
*/
}
/* only replace once? */
once = !(rpm->op_pmflags & PMf_GLOBAL);
/* known replacement string? */
c = rstr ? SvPV(rstr, clen) : Nullch;
/* can do inplace substitution? */
if (c && clen <= rx->minlen && (once || !(r_flags & REXEC_COPY_STR))
&& do_utf8 == DO_UTF8(rstr)
&& !(rx->reganch & ROPT_LOOKBEHIND_SEEN)) {
if (!CALLREGEXEC(aTHX_ rx, s, strend, orig, 0, TARG, NULL,
r_flags | REXEC_CHECKED))
{
SPAGAIN;
PUSHs(&PL_sv_no);
LEAVE_SCOPE(oldsave);
RETURN;
}
if (force_on_match) {
force_on_match = 0;
s = SvPV_force(TARG, len);
goto force_it;
}
d = s;
PL_curpm = pm;
SvSCREAM_off(TARG); /* disable possible screamer */
if (once) {
rxtainted |= RX_MATCH_TAINTED(rx);
m = orig + rx->startp[0];
d = orig + rx->endp[0];
s = orig;
if (m - s > strend - d) { /* faster to shorten from end */
if (clen) {
Copy(c, m, clen, char);
m += clen;
}
i = strend - d;
if (i > 0) {
Move(d, m, i, char);
m += i;
}
*m = '\0';
SvCUR_set(TARG, m - s);
}
/*SUPPRESS 560*/
else if ((i = m - s)) { /* faster from front */
d -= clen;
m = d;
sv_chop(TARG, d-i);
s += i;
while (i--)
*--d = *--s;
if (clen)
Copy(c, m, clen, char);
}
else if (clen) {
d -= clen;
sv_chop(TARG, d);
Copy(c, d, clen, char);
}
else {
sv_chop(TARG, d);
}
TAINT_IF(rxtainted & 1);
SPAGAIN;
PUSHs(&PL_sv_yes);
}
else {
do {
if (iters++ > maxiters)
DIE(aTHX_ "Substitution loop");
rxtainted |= RX_MATCH_TAINTED(rx);
m = rx->startp[0] + orig;
/*SUPPRESS 560*/
if ((i = m - s)) {
if (s != d)
Move(s, d, i, char);
d += i;
}
if (clen) {
Copy(c, d, clen, char);
d += clen;
}
s = rx->endp[0] + orig;
} while (CALLREGEXEC(aTHX_ rx, s, strend, orig, s == m,
TARG, NULL,
/* don't match same null twice */
REXEC_NOT_FIRST|REXEC_IGNOREPOS));
if (s != d) {
i = strend - s;
SvCUR_set(TARG, d - SvPVX(TARG) + i);
Move(s, d, i+1, char); /* include the NUL */
}
TAINT_IF(rxtainted & 1);
SPAGAIN;
PUSHs(sv_2mortal(newSViv((I32)iters)));
}
(void)SvPOK_only_UTF8(TARG);
TAINT_IF(rxtainted);
if (SvSMAGICAL(TARG)) {
PUTBACK;
mg_set(TARG);
SPAGAIN;
}
SvTAINT(TARG);
LEAVE_SCOPE(oldsave);
RETURN;
}
if (CALLREGEXEC(aTHX_ rx, s, strend, orig, 0, TARG, NULL,
r_flags | REXEC_CHECKED))
{
bool isutf8;
if (force_on_match) {
force_on_match = 0;
s = SvPV_force(TARG, len);
goto force_it;
}
rxtainted |= RX_MATCH_TAINTED(rx);
dstr = NEWSV(25, len);
sv_setpvn(dstr, m, s-m);
if (do_utf8)
SvUTF8_on(dstr);
PL_curpm = pm;
if (!c) {
register PERL_CONTEXT *cx;
SPAGAIN;
PUSHSUBST(cx);
RETURNOP(cPMOP->op_pmreplroot);
}
r_flags |= REXEC_IGNOREPOS | REXEC_NOT_FIRST;
do {
if (iters++ > maxiters)
DIE(aTHX_ "Substitution loop");
rxtainted |= RX_MATCH_TAINTED(rx);
if (RX_MATCH_COPIED(rx) && rx->subbeg != orig) {
m = s;
s = orig;
orig = rx->subbeg;
s = orig + (m - s);
strend = s + (strend - m);
}
m = rx->startp[0] + orig;
sv_catpvn(dstr, s, m-s);
s = rx->endp[0] + orig;
if (clen)
sv_catsv(dstr, rstr);
if (once)
break;
} while (CALLREGEXEC(aTHX_ rx, s, strend, orig, s == m, TARG, NULL, r_flags));
sv_catpvn(dstr, s, strend - s);
(void)SvOOK_off(TARG);
Safefree(SvPVX(TARG));
SvPVX(TARG) = SvPVX(dstr);
SvCUR_set(TARG, SvCUR(dstr));
SvLEN_set(TARG, SvLEN(dstr));
isutf8 = DO_UTF8(dstr);
SvPVX(dstr) = 0;
sv_free(dstr);
TAINT_IF(rxtainted & 1);
SPAGAIN;
PUSHs(sv_2mortal(newSViv((I32)iters)));
(void)SvPOK_only(TARG);
if (isutf8)
SvUTF8_on(TARG);
TAINT_IF(rxtainted);
SvSETMAGIC(TARG);
SvTAINT(TARG);
LEAVE_SCOPE(oldsave);
RETURN;
}
goto ret_no;
nope:
ret_no:
SPAGAIN;
PUSHs(&PL_sv_no);
LEAVE_SCOPE(oldsave);
RETURN;
}
PP(pp_grepwhile)
{
dSP;
if (SvTRUEx(POPs))
PL_stack_base[PL_markstack_ptr[-1]++] = PL_stack_base[*PL_markstack_ptr];
++*PL_markstack_ptr;
LEAVE; /* exit inner scope */
/* All done yet? */
if (PL_stack_base + *PL_markstack_ptr > SP) {
I32 items;
I32 gimme = GIMME_V;
LEAVE; /* exit outer scope */
(void)POPMARK; /* pop src */
items = --*PL_markstack_ptr - PL_markstack_ptr[-1];
(void)POPMARK; /* pop dst */
SP = PL_stack_base + POPMARK; /* pop original mark */
if (gimme == G_SCALAR) {
dTARGET;
XPUSHi(items);
}
else if (gimme == G_ARRAY)
SP += items;
RETURN;
}
else {
SV *src;
ENTER; /* enter inner scope */
SAVEVPTR(PL_curpm);
src = PL_stack_base[*PL_markstack_ptr];
SvTEMP_off(src);
DEFSV = src;
RETURNOP(cLOGOP->op_other);
}
}
PP(pp_leavesub)
{
dSP;
SV **mark;
SV **newsp;
PMOP *newpm;
I32 gimme;
register PERL_CONTEXT *cx;
SV *sv;
POPBLOCK(cx,newpm);
TAINT_NOT;
if (gimme == G_SCALAR) {
MARK = newsp + 1;
if (MARK <= SP) {
if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
if (SvTEMP(TOPs)) {
*MARK = SvREFCNT_inc(TOPs);
FREETMPS;
sv_2mortal(*MARK);
}
else {
sv = SvREFCNT_inc(TOPs); /* FREETMPS could clobber it */
FREETMPS;
*MARK = sv_mortalcopy(sv);
SvREFCNT_dec(sv);
}
}
else
*MARK = SvTEMP(TOPs) ? TOPs : sv_mortalcopy(TOPs);
}
else {
MEXTEND(MARK, 0);
*MARK = &PL_sv_undef;
}
SP = MARK;
}
else if (gimme == G_ARRAY) {
for (MARK = newsp + 1; MARK <= SP; MARK++) {
if (!SvTEMP(*MARK)) {
*MARK = sv_mortalcopy(*MARK);
TAINT_NOT; /* Each item is independent */
}
}
}
PUTBACK;
POPSUB(cx,sv); /* Stack values are safe: release CV and @_ ... */
PL_curpm = newpm; /* ... and pop $1 et al */
LEAVE;
LEAVESUB(sv);
return pop_return();
}
/* This duplicates the above code because the above code must not
* get any slower by more conditions */
PP(pp_leavesublv)
{
dSP;
SV **mark;
SV **newsp;
PMOP *newpm;
I32 gimme;
register PERL_CONTEXT *cx;
SV *sv;
POPBLOCK(cx,newpm);
TAINT_NOT;
if (cx->blk_sub.lval & OPpENTERSUB_INARGS) {
/* We are an argument to a function or grep().
* This kind of lvalueness was legal before lvalue
* subroutines too, so be backward compatible:
* cannot report errors. */
/* Scalar context *is* possible, on the LHS of -> only,
* as in f()->meth(). But this is not an lvalue. */
if (gimme == G_SCALAR)
goto temporise;
if (gimme == G_ARRAY) {
if (!CvLVALUE(cx->blk_sub.cv))
goto temporise_array;
EXTEND_MORTAL(SP - newsp);
for (mark = newsp + 1; mark <= SP; mark++) {
if (SvTEMP(*mark))
/* empty */ ;
else if (SvFLAGS(*mark) & (SVs_PADTMP | SVf_READONLY))
*mark = sv_mortalcopy(*mark);
else {
/* Can be a localized value subject to deletion. */
PL_tmps_stack[++PL_tmps_ix] = *mark;
(void)SvREFCNT_inc(*mark);
}
}
}
}
else if (cx->blk_sub.lval) { /* Leave it as it is if we can. */
/* Here we go for robustness, not for speed, so we change all
* the refcounts so the caller gets a live guy. Cannot set
* TEMP, so sv_2mortal is out of question. */
if (!CvLVALUE(cx->blk_sub.cv)) {
POPSUB(cx,sv);
PL_curpm = newpm;
LEAVE;
LEAVESUB(sv);
DIE(aTHX_ "Can't modify non-lvalue subroutine call");
}
if (gimme == G_SCALAR) {
MARK = newsp + 1;
EXTEND_MORTAL(1);
if (MARK == SP) {
if (SvFLAGS(TOPs) & (SVs_TEMP | SVs_PADTMP | SVf_READONLY)) {
POPSUB(cx,sv);
PL_curpm = newpm;
LEAVE;
LEAVESUB(sv);
DIE(aTHX_ "Can't return a %s from lvalue subroutine",
SvREADONLY(TOPs) ? "readonly value" : "temporary");
}
else { /* Can be a localized value
* subject to deletion. */
PL_tmps_stack[++PL_tmps_ix] = *mark;
(void)SvREFCNT_inc(*mark);
}
}
else { /* Should not happen? */
POPSUB(cx,sv);
PL_curpm = newpm;
LEAVE;
LEAVESUB(sv);
DIE(aTHX_ "%s returned from lvalue subroutine in scalar context",
(MARK > SP ? "Empty array" : "Array"));
}
SP = MARK;
}
else if (gimme == G_ARRAY) {
EXTEND_MORTAL(SP - newsp);
for (mark = newsp + 1; mark <= SP; mark++) {
if (SvFLAGS(*mark) & (SVs_TEMP | SVs_PADTMP | SVf_READONLY)) {
/* Might be flattened array after $#array = */
PUTBACK;
POPSUB(cx,sv);
PL_curpm = newpm;
LEAVE;
LEAVESUB(sv);
DIE(aTHX_ "Can't return %s from lvalue subroutine",
(*mark != &PL_sv_undef)
? (SvREADONLY(TOPs)
? "a readonly value" : "a temporary")
: "an uninitialized value");
}
else {
/* Can be a localized value subject to deletion. */
PL_tmps_stack[++PL_tmps_ix] = *mark;
(void)SvREFCNT_inc(*mark);
}
}
}
}
else {
if (gimme == G_SCALAR) {
temporise:
MARK = newsp + 1;
if (MARK <= SP) {
if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
if (SvTEMP(TOPs)) {
*MARK = SvREFCNT_inc(TOPs);
FREETMPS;
sv_2mortal(*MARK);
}
else {
sv = SvREFCNT_inc(TOPs); /* FREETMPS could clobber it */
FREETMPS;
*MARK = sv_mortalcopy(sv);
SvREFCNT_dec(sv);
}
}
else
*MARK = SvTEMP(TOPs) ? TOPs : sv_mortalcopy(TOPs);
}
else {
MEXTEND(MARK, 0);
*MARK = &PL_sv_undef;
}
SP = MARK;
}
else if (gimme == G_ARRAY) {
temporise_array:
for (MARK = newsp + 1; MARK <= SP; MARK++) {
if (!SvTEMP(*MARK)) {
*MARK = sv_mortalcopy(*MARK);
TAINT_NOT; /* Each item is independent */
}
}
}
}
PUTBACK;
POPSUB(cx,sv); /* Stack values are safe: release CV and @_ ... */
PL_curpm = newpm; /* ... and pop $1 et al */
LEAVE;
LEAVESUB(sv);
return pop_return();
}
STATIC CV *
S_get_db_sub(pTHX_ SV **svp, CV *cv)
{
SV *dbsv = GvSV(PL_DBsub);
if (!PERLDB_SUB_NN) {
GV *gv = CvGV(cv);
save_item(dbsv);
if ( (CvFLAGS(cv) & (CVf_ANON | CVf_CLONED))
|| strEQ(GvNAME(gv), "END")
|| ((GvCV(gv) != cv) && /* Could be imported, and old sub redefined. */
!( (SvTYPE(*svp) == SVt_PVGV) && (GvCV((GV*)*svp) == cv)
&& (gv = (GV*)*svp) ))) {
/* Use GV from the stack as a fallback. */
/* GV is potentially non-unique, or contain different CV. */
SV *tmp = newRV((SV*)cv);
sv_setsv(dbsv, tmp);
SvREFCNT_dec(tmp);
}
else {
gv_efullname3(dbsv, gv, Nullch);
}
}
else {
(void)SvUPGRADE(dbsv, SVt_PVIV);
(void)SvIOK_on(dbsv);
SAVEIV(SvIVX(dbsv));
SvIVX(dbsv) = PTR2IV(cv); /* Do it the quickest way */
}
if (CvXSUB(cv))
PL_curcopdb = PL_curcop;
cv = GvCV(PL_DBsub);
return cv;
}
PP(pp_entersub)
{
dSP; dPOPss;
GV *gv;
HV *stash;
register CV *cv;
register PERL_CONTEXT *cx;
I32 gimme;
bool hasargs = (PL_op->op_flags & OPf_STACKED) != 0;
if (!sv)
DIE(aTHX_ "Not a CODE reference");
switch (SvTYPE(sv)) {
default:
if (!SvROK(sv)) {
char *sym;
STRLEN n_a;
if (sv == &PL_sv_yes) { /* unfound import, ignore */
if (hasargs)
SP = PL_stack_base + POPMARK;
RETURN;
}
if (SvGMAGICAL(sv)) {
mg_get(sv);
sym = SvPOKp(sv) ? SvPVX(sv) : Nullch;
}
else
sym = SvPV(sv, n_a);
if (!sym)
DIE(aTHX_ PL_no_usym, "a subroutine");
if (PL_op->op_private & HINT_STRICT_REFS)
DIE(aTHX_ PL_no_symref, sym, "a subroutine");
cv = get_cv(sym, TRUE);
break;
}
{
SV **sp = &sv; /* Used in tryAMAGICunDEREF macro. */
tryAMAGICunDEREF(to_cv);
}
cv = (CV*)SvRV(sv);
if (SvTYPE(cv) == SVt_PVCV)
break;
/* FALL THROUGH */
case SVt_PVHV:
case SVt_PVAV:
DIE(aTHX_ "Not a CODE reference");
case SVt_PVCV:
cv = (CV*)sv;
break;
case SVt_PVGV:
if (!(cv = GvCVu((GV*)sv)))
cv = sv_2cv(sv, &stash, &gv, FALSE);
if (!cv) {
ENTER;
SAVETMPS;
goto try_autoload;
}
break;
}
ENTER;
SAVETMPS;
retry:
if (!CvROOT(cv) && !CvXSUB(cv)) {
GV* autogv;
SV* sub_name;
/* anonymous or undef'd function leaves us no recourse */
if (CvANON(cv) || !(gv = CvGV(cv)))
DIE(aTHX_ "Undefined subroutine called");
/* autoloaded stub? */
if (cv != GvCV(gv)) {
cv = GvCV(gv);
}
/* should call AUTOLOAD now? */
else {
try_autoload:
if ((autogv = gv_autoload4(GvSTASH(gv), GvNAME(gv), GvNAMELEN(gv),
FALSE)))
{
cv = GvCV(autogv);
}
/* sorry */
else {
sub_name = sv_newmortal();
gv_efullname3(sub_name, gv, Nullch);
DIE(aTHX_ "Undefined subroutine &%s called", SvPVX(sub_name));
}
}
if (!cv)
DIE(aTHX_ "Not a CODE reference");
goto retry;
}
gimme = GIMME_V;
if ((PL_op->op_private & OPpENTERSUB_DB) && GvCV(PL_DBsub) && !CvNODEBUG(cv)) {
cv = get_db_sub(&sv, cv);
if (!cv)
DIE(aTHX_ "No DBsub routine");
}
#ifdef USE_THREADS
/*
* First we need to check if the sub or method requires locking.
* If so, we gain a lock on the CV, the first argument or the
* stash (for static methods), as appropriate. This has to be
* inline because for FAKE_THREADS, COND_WAIT inlines code to
* reschedule by returning a new op.
*/
MUTEX_LOCK(CvMUTEXP(cv));
if (CvFLAGS(cv) & CVf_LOCKED) {
MAGIC *mg;
if (CvFLAGS(cv) & CVf_METHOD) {
if (SP > PL_stack_base + TOPMARK)
sv = *(PL_stack_base + TOPMARK + 1);
else {
AV *av = (AV*)PL_curpad[0];
if (hasargs || !av || AvFILLp(av) < 0
|| !(sv = AvARRAY(av)[0]))
{
MUTEX_UNLOCK(CvMUTEXP(cv));
DIE(aTHX_ "no argument for locked method call");
}
}
if (SvROK(sv))
sv = SvRV(sv);
else {
STRLEN len;
char *stashname = SvPV(sv, len);
sv = (SV*)gv_stashpvn(stashname, len, TRUE);
}
}
else {
sv = (SV*)cv;
}
MUTEX_UNLOCK(CvMUTEXP(cv));
mg = condpair_magic(sv);
MUTEX_LOCK(MgMUTEXP(mg));
if (MgOWNER(mg) == thr)
MUTEX_UNLOCK(MgMUTEXP(mg));
else {
while (MgOWNER(mg))
COND_WAIT(MgOWNERCONDP(mg), MgMUTEXP(mg));
MgOWNER(mg) = thr;
DEBUG_S(PerlIO_printf(Perl_debug_log, "%p: pp_entersub lock %p\n",
thr, sv);)
MUTEX_UNLOCK(MgMUTEXP(mg));
SAVEDESTRUCTOR_X(Perl_unlock_condpair, sv);
}
MUTEX_LOCK(CvMUTEXP(cv));
}
/*
* Now we have permission to enter the sub, we must distinguish
* four cases. (0) It's an XSUB (in which case we don't care
* about ownership); (1) it's ours already (and we're recursing);
* (2) it's free (but we may already be using a cached clone);
* (3) another thread owns it. Case (1) is easy: we just use it.
* Case (2) means we look for a clone--if we have one, use it
* otherwise grab ownership of cv. Case (3) means we look for a
* clone (for non-XSUBs) and have to create one if we don't
* already have one.
* Why look for a clone in case (2) when we could just grab
* ownership of cv straight away? Well, we could be recursing,
* i.e. we originally tried to enter cv while another thread
* owned it (hence we used a clone) but it has been freed up
* and we're now recursing into it. It may or may not be "better"
* to use the clone but at least CvDEPTH can be trusted.
*/
if (CvOWNER(cv) == thr || CvXSUB(cv))
MUTEX_UNLOCK(CvMUTEXP(cv));
else {
/* Case (2) or (3) */
SV **svp;
/*
* XXX Might it be better to release CvMUTEXP(cv) while we
* do the hv_fetch? We might find someone has pinched it
* when we look again, in which case we would be in case
* (3) instead of (2) so we'd have to clone. Would the fact
* that we released the mutex more quickly make up for this?
*/
if ((svp = hv_fetch(thr->cvcache, (char *)cv, sizeof(cv), FALSE)))
{
/* We already have a clone to use */
MUTEX_UNLOCK(CvMUTEXP(cv));
cv = *(CV**)svp;
DEBUG_S(PerlIO_printf(Perl_debug_log,
"entersub: %p already has clone %p:%s\n",
thr, cv, SvPEEK((SV*)cv)));
CvOWNER(cv) = thr;
SvREFCNT_inc(cv);
if (CvDEPTH(cv) == 0)
SAVEDESTRUCTOR_X(unset_cvowner, (void*) cv);
}
else {
/* (2) => grab ownership of cv. (3) => make clone */
if (!CvOWNER(cv)) {
CvOWNER(cv) = thr;
SvREFCNT_inc(cv);
MUTEX_UNLOCK(CvMUTEXP(cv));
DEBUG_S(PerlIO_printf(Perl_debug_log,
"entersub: %p grabbing %p:%s in stash %s\n",
thr, cv, SvPEEK((SV*)cv), CvSTASH(cv) ?
HvNAME(CvSTASH(cv)) : "(none)"));
}
else {
/* Make a new clone. */
CV *clonecv;
SvREFCNT_inc(cv); /* don't let it vanish from under us */
MUTEX_UNLOCK(CvMUTEXP(cv));
DEBUG_S((PerlIO_printf(Perl_debug_log,
"entersub: %p cloning %p:%s\n",
thr, cv, SvPEEK((SV*)cv))));
/*
* We're creating a new clone so there's no race
* between the original MUTEX_UNLOCK and the
* SvREFCNT_inc since no one will be trying to undef
* it out from underneath us. At least, I don't think
* there's a race...
*/
clonecv = cv_clone(cv);
SvREFCNT_dec(cv); /* finished with this */
hv_store(thr->cvcache, (char*)cv, sizeof(cv), (SV*)clonecv,0);
CvOWNER(clonecv) = thr;
cv = clonecv;
SvREFCNT_inc(cv);
}
DEBUG_S(if (CvDEPTH(cv) != 0)
PerlIO_printf(Perl_debug_log, "depth %ld != 0\n",
CvDEPTH(cv)););
SAVEDESTRUCTOR_X(unset_cvowner, (void*) cv);
}
}
#endif /* USE_THREADS */
if (CvXSUB(cv)) {
#ifdef PERL_XSUB_OLDSTYLE
if (CvOLDSTYLE(cv)) {
I32 (*fp3)(int,int,int);
dMARK;
register I32 items = SP - MARK;
/* We dont worry to copy from @_. */
while (SP > mark) {
SP[1] = SP[0];
SP--;
}
PL_stack_sp = mark + 1;
fp3 = (I32(*)(int,int,int))CvXSUB(cv);
items = (*fp3)(CvXSUBANY(cv).any_i32,
MARK - PL_stack_base + 1,
items);
PL_stack_sp = PL_stack_base + items;
}
else
#endif /* PERL_XSUB_OLDSTYLE */
{
I32 markix = TOPMARK;
PUTBACK;
if (!hasargs) {
/* Need to copy @_ to stack. Alternative may be to
* switch stack to @_, and copy return values
* back. This would allow popping @_ in XSUB, e.g.. XXXX */
AV* av;
I32 items;
#ifdef USE_THREADS
av = (AV*)PL_curpad[0];
#else
av = GvAV(PL_defgv);
#endif /* USE_THREADS */
items = AvFILLp(av) + 1; /* @_ is not tieable */
if (items) {
/* Mark is at the end of the stack. */
EXTEND(SP, items);
Copy(AvARRAY(av), SP + 1, items, SV*);
SP += items;
PUTBACK ;
}
}
/* We assume first XSUB in &DB::sub is the called one. */
if (PL_curcopdb) {
SAVEVPTR(PL_curcop);
PL_curcop = PL_curcopdb;
PL_curcopdb = NULL;
}
/* Do we need to open block here? XXXX */
(void)(*CvXSUB(cv))(aTHXo_ cv);
/* Enforce some sanity in scalar context. */
if (gimme == G_SCALAR && ++markix != PL_stack_sp - PL_stack_base ) {
if (markix > PL_stack_sp - PL_stack_base)
*(PL_stack_base + markix) = &PL_sv_undef;
else
*(PL_stack_base + markix) = *PL_stack_sp;
PL_stack_sp = PL_stack_base + markix;
}
}
LEAVE;
return NORMAL;
}
else {
dMARK;
register I32 items = SP - MARK;
AV* padlist = CvPADLIST(cv);
SV** svp = AvARRAY(padlist);
push_return(PL_op->op_next);
PUSHBLOCK(cx, CXt_SUB, MARK);
PUSHSUB(cx);
CvDEPTH(cv)++;
/* XXX This would be a natural place to set C<PL_compcv = cv> so
* that eval'' ops within this sub know the correct lexical space.
* Owing the speed considerations, we choose to search for the cv
* in doeval() instead.
*/
if (CvDEPTH(cv) < 2)
(void)SvREFCNT_inc(cv);
else { /* save temporaries on recursion? */
PERL_STACK_OVERFLOW_CHECK();
if (CvDEPTH(cv) > AvFILLp(padlist)) {
AV *av;
AV *newpad = newAV();
SV **oldpad = AvARRAY(svp[CvDEPTH(cv)-1]);
I32 ix = AvFILLp((AV*)svp[1]);
I32 names_fill = AvFILLp((AV*)svp[0]);
svp = AvARRAY(svp[0]);
for ( ;ix > 0; ix--) {
if (names_fill >= ix && svp[ix] != &PL_sv_undef) {
char *name = SvPVX(svp[ix]);
if ((SvFLAGS(svp[ix]) & SVf_FAKE) /* outer lexical? */
|| *name == '&') /* anonymous code? */
{
av_store(newpad, ix, SvREFCNT_inc(oldpad[ix]));
}
else { /* our own lexical */
if (*name == '@')
av_store(newpad, ix, sv = (SV*)newAV());
else if (*name == '%')
av_store(newpad, ix, sv = (SV*)newHV());
else
av_store(newpad, ix, sv = NEWSV(0,0));
SvPADMY_on(sv);
}
}
else if (IS_PADGV(oldpad[ix]) || IS_PADCONST(oldpad[ix])) {
av_store(newpad, ix, sv = SvREFCNT_inc(oldpad[ix]));
}
else {
av_store(newpad, ix, sv = NEWSV(0,0));
SvPADTMP_on(sv);
}
}
av = newAV(); /* will be @_ */
av_extend(av, 0);
av_store(newpad, 0, (SV*)av);
AvFLAGS(av) = AVf_REIFY;
av_store(padlist, CvDEPTH(cv), (SV*)newpad);
AvFILLp(padlist) = CvDEPTH(cv);
svp = AvARRAY(padlist);
}
}
#ifdef USE_THREADS
if (!hasargs) {
AV* av = (AV*)PL_curpad[0];
items = AvFILLp(av) + 1;
if (items) {
/* Mark is at the end of the stack. */
EXTEND(SP, items);
Copy(AvARRAY(av), SP + 1, items, SV*);
SP += items;
PUTBACK ;
}
}
#endif /* USE_THREADS */
SAVEVPTR(PL_curpad);
PL_curpad = AvARRAY((AV*)svp[CvDEPTH(cv)]);
#ifndef USE_THREADS
if (hasargs)
#endif /* USE_THREADS */
{
AV* av;
SV** ary;
#if 0
DEBUG_S(PerlIO_printf(Perl_debug_log,
"%p entersub preparing @_\n", thr));
#endif
av = (AV*)PL_curpad[0];
if (AvREAL(av)) {
/* @_ is normally not REAL--this should only ever
* happen when DB::sub() calls things that modify @_ */
av_clear(av);
AvREAL_off(av);
AvREIFY_on(av);
}
#ifndef USE_THREADS
cx->blk_sub.savearray = GvAV(PL_defgv);
GvAV(PL_defgv) = (AV*)SvREFCNT_inc(av);
#endif /* USE_THREADS */
cx->blk_sub.oldcurpad = PL_curpad;
cx->blk_sub.argarray = av;
++MARK;
if (items > AvMAX(av) + 1) {
ary = AvALLOC(av);
if (AvARRAY(av) != ary) {
AvMAX(av) += AvARRAY(av) - AvALLOC(av);
SvPVX(av) = (char*)ary;
}
if (items > AvMAX(av) + 1) {
AvMAX(av) = items - 1;
Renew(ary,items,SV*);
AvALLOC(av) = ary;
SvPVX(av) = (char*)ary;
}
}
Copy(MARK,AvARRAY(av),items,SV*);
AvFILLp(av) = items - 1;
while (items--) {
if (*MARK)
SvTEMP_off(*MARK);
MARK++;
}
}
/* warning must come *after* we fully set up the context
* stuff so that __WARN__ handlers can safely dounwind()
* if they want to
*/
if (CvDEPTH(cv) == 100 && ckWARN(WARN_RECURSION)
&& !(PERLDB_SUB && cv == GvCV(PL_DBsub)))
sub_crush_depth(cv);
#if 0
DEBUG_S(PerlIO_printf(Perl_debug_log,
"%p entersub returning %p\n", thr, CvSTART(cv)));
#endif
RETURNOP(CvSTART(cv));
}
}
void
Perl_sub_crush_depth(pTHX_ CV *cv)
{
if (CvANON(cv))
Perl_warner(aTHX_ WARN_RECURSION, "Deep recursion on anonymous subroutine");
else {
SV* tmpstr = sv_newmortal();
gv_efullname3(tmpstr, CvGV(cv), Nullch);
Perl_warner(aTHX_ WARN_RECURSION, "Deep recursion on subroutine \"%s\"",
SvPVX(tmpstr));
}
}
PP(pp_aelem)
{
dSP;
SV** svp;
IV elem = POPi;
AV* av = (AV*)POPs;
U32 lval = PL_op->op_flags & OPf_MOD || LVRET;
U32 defer = (PL_op->op_private & OPpLVAL_DEFER) && (elem > AvFILL(av));
SV *sv;
if (elem > 0)
elem -= PL_curcop->cop_arybase;
if (SvTYPE(av) != SVt_PVAV)
RETPUSHUNDEF;
svp = av_fetch(av, elem, lval && !defer);
if (lval) {
if (!svp || *svp == &PL_sv_undef) {
SV* lv;
if (!defer)
DIE(aTHX_ PL_no_aelem, elem);
lv = sv_newmortal();
sv_upgrade(lv, SVt_PVLV);
LvTYPE(lv) = 'y';
sv_magic(lv, Nullsv, 'y', Nullch, 0);
LvTARG(lv) = SvREFCNT_inc(av);
LvTARGOFF(lv) = elem;
LvTARGLEN(lv) = 1;
PUSHs(lv);
RETURN;
}
if (PL_op->op_private & OPpLVAL_INTRO)
save_aelem(av, elem, svp);
else if (PL_op->op_private & OPpDEREF)
vivify_ref(*svp, PL_op->op_private & OPpDEREF);
}
sv = (svp ? *svp : &PL_sv_undef);
if (!lval && SvGMAGICAL(sv)) /* see note in pp_helem() */
sv = sv_mortalcopy(sv);
PUSHs(sv);
RETURN;
}
void
Perl_vivify_ref(pTHX_ SV *sv, U32 to_what)
{
if (SvGMAGICAL(sv))
mg_get(sv);
if (!SvOK(sv)) {
if (SvREADONLY(sv))
Perl_croak(aTHX_ PL_no_modify);
if (SvTYPE(sv) < SVt_RV)
sv_upgrade(sv, SVt_RV);
else if (SvTYPE(sv) >= SVt_PV) {
(void)SvOOK_off(sv);
Safefree(SvPVX(sv));
SvLEN(sv) = SvCUR(sv) = 0;
}
switch (to_what) {
case OPpDEREF_SV:
SvRV(sv) = NEWSV(355,0);
break;
case OPpDEREF_AV:
SvRV(sv) = (SV*)newAV();
break;
case OPpDEREF_HV:
SvRV(sv) = (SV*)newHV();
break;
}
SvROK_on(sv);
SvSETMAGIC(sv);
}
}
PP(pp_method)
{
dSP;
SV* sv = TOPs;
if (SvROK(sv)) {
SV* rsv = SvRV(sv);
if (SvTYPE(rsv) == SVt_PVCV) {
SETs(rsv);
RETURN;
}
}
SETs(method_common(sv, Null(U32*)));
RETURN;
}
PP(pp_method_named)
{
dSP;
SV* sv = cSVOP->op_sv;
U32 hash = SvUVX(sv);
XPUSHs(method_common(sv, &hash));
RETURN;
}
STATIC SV *
S_method_common(pTHX_ SV* meth, U32* hashp)
{
SV* sv;
SV* ob;
GV* gv;
HV* stash;
char* name;
STRLEN namelen;
char* packname;
STRLEN packlen;
name = SvPV(meth, namelen);
sv = *(PL_stack_base + TOPMARK + 1);
if (!sv)
Perl_croak(aTHX_ "Can't call method \"%s\" on an undefined value", name);
if (SvGMAGICAL(sv))
mg_get(sv);
if (SvROK(sv))
ob = (SV*)SvRV(sv);
else {
GV* iogv;
packname = Nullch;
if (!SvOK(sv) ||
!(packname = SvPV(sv, packlen)) ||
!(iogv = gv_fetchpv(packname, FALSE, SVt_PVIO)) ||
!(ob=(SV*)GvIO(iogv)))
{
if (!packname ||
((UTF8_IS_START(*packname) && DO_UTF8(sv))
? !isIDFIRST_utf8((U8*)packname)
: !isIDFIRST(*packname)
))
{
Perl_croak(aTHX_ "Can't call method \"%s\" %s", name,
SvOK(sv) ? "without a package or object reference"
: "on an undefined value");
}
stash = gv_stashpvn(packname, packlen, TRUE);
goto fetch;
}
*(PL_stack_base + TOPMARK + 1) = sv_2mortal(newRV((SV*)iogv));
}
if (!ob || !(SvOBJECT(ob)
|| (SvTYPE(ob) == SVt_PVGV && (ob = (SV*)GvIO((GV*)ob))
&& SvOBJECT(ob))))
{
Perl_croak(aTHX_ "Can't call method \"%s\" on unblessed reference",
name);
}
stash = SvSTASH(ob);
fetch:
/* shortcut for simple names */
if (hashp) {
HE* he = hv_fetch_ent(stash, meth, 0, *hashp);
if (he) {
gv = (GV*)HeVAL(he);
if (isGV(gv) && GvCV(gv) &&
(!GvCVGEN(gv) || GvCVGEN(gv) == PL_sub_generation))
return (SV*)GvCV(gv);
}
}
gv = gv_fetchmethod(stash, name);
if (!gv) {
char* leaf = name;
char* sep = Nullch;
char* p;
GV* gv;
for (p = name; *p; p++) {
if (*p == '\'')
sep = p, leaf = p + 1;
else if (*p == ':' && *(p + 1) == ':')
sep = p, leaf = p + 2;
}
if (!sep || ((sep - name) == 5 && strnEQ(name, "SUPER", 5))) {
packname = sep ? CopSTASHPV(PL_curcop) : HvNAME(stash);
packlen = strlen(packname);
}
else {
packname = name;
packlen = sep - name;
}
gv = gv_fetchpv(packname, 0, SVt_PVHV);
if (gv && isGV(gv)) {
Perl_croak(aTHX_
"Can't locate object method \"%s\" via package \"%s\"",
leaf, packname);
}
else {
Perl_croak(aTHX_
"Can't locate object method \"%s\" via package \"%s\""
" (perhaps you forgot to load \"%s\"?)",
leaf, packname, packname);
}
}
return isGV(gv) ? (SV*)GvCV(gv) : (SV*)gv;
}
#ifdef USE_THREADS
static void
unset_cvowner(pTHXo_ void *cvarg)
{
register CV* cv = (CV *) cvarg;
DEBUG_S((PerlIO_printf(Perl_debug_log, "%p unsetting CvOWNER of %p:%s\n",
thr, cv, SvPEEK((SV*)cv))));
MUTEX_LOCK(CvMUTEXP(cv));
DEBUG_S(if (CvDEPTH(cv) != 0)
PerlIO_printf(Perl_debug_log, "depth %ld != 0\n",
CvDEPTH(cv)););
assert(thr == CvOWNER(cv));
CvOWNER(cv) = 0;
MUTEX_UNLOCK(CvMUTEXP(cv));
SvREFCNT_dec(cv);
}
#endif /* USE_THREADS */
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