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/* pp_ctl.c
*
* Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
* 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by Larry Wall and others
*
* You may distribute under the terms of either the GNU General Public
* License or the Artistic License, as specified in the README file.
*
*/
/*
* Now far ahead the Road has gone,
* And I must follow, if I can,
* Pursuing it with eager feet,
* Until it joins some larger way
* Where many paths and errands meet.
* And whither then? I cannot say.
*
* [Bilbo on p.35 of _The Lord of the Rings_, I/i: "A Long-Expected Party"]
*/
/* This file contains control-oriented pp ("push/pop") functions that
* execute the opcodes that make up a perl program. A typical pp function
* expects to find its arguments on the stack, and usually pushes its
* results onto the stack, hence the 'pp' terminology. Each OP structure
* contains a pointer to the relevant pp_foo() function.
*
* Control-oriented means things like pp_enteriter() and pp_next(), which
* alter the flow of control of the program.
*/
#include "EXTERN.h"
#define PERL_IN_PP_CTL_C
#include "perl.h"
#define DOCATCH(o) ((CATCH_GET == TRUE) ? docatch(o) : (o))
#define dopoptosub(plop) dopoptosub_at(cxstack, (plop))
PP(pp_wantarray)
{
dSP;
I32 cxix;
const PERL_CONTEXT *cx;
EXTEND(SP, 1);
if (PL_op->op_private & OPpOFFBYONE) {
if (!(cx = caller_cx(1,NULL))) RETPUSHUNDEF;
}
else {
cxix = dopoptosub(cxstack_ix);
if (cxix < 0)
RETPUSHUNDEF;
cx = &cxstack[cxix];
}
switch (cx->blk_gimme) {
case G_ARRAY:
RETPUSHYES;
case G_SCALAR:
RETPUSHNO;
default:
RETPUSHUNDEF;
}
}
PP(pp_regcreset)
{
TAINT_NOT;
return NORMAL;
}
PP(pp_regcomp)
{
dSP;
PMOP *pm = (PMOP*)cLOGOP->op_other;
SV **args;
int nargs;
REGEXP *re = NULL;
REGEXP *new_re;
const regexp_engine *eng;
bool is_bare_re= FALSE;
if (PL_op->op_flags & OPf_STACKED) {
dMARK;
nargs = SP - MARK;
args = ++MARK;
}
else {
nargs = 1;
args = SP;
}
/* prevent recompiling under /o and ithreads. */
#if defined(USE_ITHREADS)
if (pm->op_pmflags & PMf_KEEP && PM_GETRE(pm)) {
SP = args-1;
RETURN;
}
#endif
re = PM_GETRE(pm);
assert (re != (REGEXP*) &PL_sv_undef);
eng = re ? RX_ENGINE(re) : current_re_engine();
/*
In the below logic: these are basically the same - check if this regcomp is part of a split.
(PL_op->op_pmflags & PMf_split )
(PL_op->op_next->op_type == OP_PUSHRE)
We could add a new mask for this and copy the PMf_split, if we did
some bit definition fiddling first.
For now we leave this
*/
new_re = (eng->op_comp
? eng->op_comp
: &Perl_re_op_compile
)(aTHX_ args, nargs, pm->op_code_list, eng, re,
&is_bare_re,
(pm->op_pmflags & RXf_PMf_FLAGCOPYMASK),
pm->op_pmflags |
(PL_op->op_flags & OPf_SPECIAL ? PMf_USE_RE_EVAL : 0));
if (pm->op_pmflags & PMf_HAS_CV)
ReANY(new_re)->qr_anoncv
= (CV*) SvREFCNT_inc(PAD_SV(PL_op->op_targ));
if (is_bare_re) {
REGEXP *tmp;
/* The match's LHS's get-magic might need to access this op's regexp
(e.g. $' =~ /$re/ while foo; see bug 70764). So we must call
get-magic now before we replace the regexp. Hopefully this hack can
be replaced with the approach described at
http://www.nntp.perl.org/group/perl.perl5.porters/2007/03/msg122415.html
some day. */
if (pm->op_type == OP_MATCH) {
SV *lhs;
const bool was_tainted = TAINT_get;
if (pm->op_flags & OPf_STACKED)
lhs = args[-1];
else if (pm->op_targ)
lhs = PAD_SV(pm->op_targ);
else lhs = DEFSV;
SvGETMAGIC(lhs);
/* Restore the previous value of PL_tainted (which may have been
modified by get-magic), to avoid incorrectly setting the
RXf_TAINTED flag with RX_TAINT_on further down. */
TAINT_set(was_tainted);
#ifdef NO_TAINT_SUPPORT
PERL_UNUSED_VAR(was_tainted);
#endif
}
tmp = reg_temp_copy(NULL, new_re);
ReREFCNT_dec(new_re);
new_re = tmp;
}
if (re != new_re) {
ReREFCNT_dec(re);
PM_SETRE(pm, new_re);
}
if (TAINTING_get && TAINT_get) {
SvTAINTED_on((SV*)new_re);
RX_TAINT_on(new_re);
}
#if !defined(USE_ITHREADS)
/* can't change the optree at runtime either */
/* PMf_KEEP is handled differently under threads to avoid these problems */
if (!RX_PRELEN(PM_GETRE(pm)) && PL_curpm)
pm = PL_curpm;
if (pm->op_pmflags & PMf_KEEP) {
pm->op_private &= ~OPpRUNTIME; /* no point compiling again */
cLOGOP->op_first->op_next = PL_op->op_next;
}
#endif
SP = args-1;
RETURN;
}
PP(pp_substcont)
{
dSP;
PERL_CONTEXT *cx = &cxstack[cxstack_ix];
PMOP * const pm = (PMOP*) cLOGOP->op_other;
SV * const dstr = cx->sb_dstr;
char *s = cx->sb_s;
char *m = cx->sb_m;
char *orig = cx->sb_orig;
REGEXP * const rx = cx->sb_rx;
SV *nsv = NULL;
REGEXP *old = PM_GETRE(pm);
PERL_ASYNC_CHECK();
if(old != rx) {
if(old)
ReREFCNT_dec(old);
PM_SETRE(pm,ReREFCNT_inc(rx));
}
rxres_restore(&cx->sb_rxres, rx);
if (cx->sb_iters++) {
const SSize_t saviters = cx->sb_iters;
if (cx->sb_iters > cx->sb_maxiters)
DIE(aTHX_ "Substitution loop");
SvGETMAGIC(TOPs); /* possibly clear taint on $1 etc: #67962 */
/* See "how taint works" above pp_subst() */
if (SvTAINTED(TOPs))
cx->sb_rxtainted |= SUBST_TAINT_REPL;
sv_catsv_nomg(dstr, POPs);
if (CxONCE(cx) || s < orig ||
!CALLREGEXEC(rx, s, cx->sb_strend, orig,
(s == m), cx->sb_targ, NULL,
(REXEC_IGNOREPOS|REXEC_NOT_FIRST|REXEC_FAIL_ON_UNDERFLOW)))
{
SV *targ = cx->sb_targ;
assert(cx->sb_strend >= s);
if(cx->sb_strend > s) {
if (DO_UTF8(dstr) && !SvUTF8(targ))
sv_catpvn_nomg_utf8_upgrade(dstr, s, cx->sb_strend - s, nsv);
else
sv_catpvn_nomg(dstr, s, cx->sb_strend - s);
}
if (RX_MATCH_TAINTED(rx)) /* run time pattern taint, eg locale */
cx->sb_rxtainted |= SUBST_TAINT_PAT;
if (pm->op_pmflags & PMf_NONDESTRUCT) {
PUSHs(dstr);
/* From here on down we're using the copy, and leaving the
original untouched. */
targ = dstr;
}
else {
SV_CHECK_THINKFIRST_COW_DROP(targ);
if (isGV(targ)) Perl_croak_no_modify();
SvPV_free(targ);
SvPV_set(targ, SvPVX(dstr));
SvCUR_set(targ, SvCUR(dstr));
SvLEN_set(targ, SvLEN(dstr));
if (DO_UTF8(dstr))
SvUTF8_on(targ);
SvPV_set(dstr, NULL);
PL_tainted = 0;
mPUSHi(saviters - 1);
(void)SvPOK_only_UTF8(targ);
}
/* update the taint state of various various variables in
* preparation for final exit.
* See "how taint works" above pp_subst() */
if (TAINTING_get) {
if ((cx->sb_rxtainted & SUBST_TAINT_PAT) ||
((cx->sb_rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_RETAINT))
== (SUBST_TAINT_STR|SUBST_TAINT_RETAINT))
)
(RX_MATCH_TAINTED_on(rx)); /* taint $1 et al */
if (!(cx->sb_rxtainted & SUBST_TAINT_BOOLRET)
&& (cx->sb_rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_PAT))
)
SvTAINTED_on(TOPs); /* taint return value */
/* needed for mg_set below */
TAINT_set(
cBOOL(cx->sb_rxtainted &
(SUBST_TAINT_STR|SUBST_TAINT_PAT|SUBST_TAINT_REPL))
);
SvTAINT(TARG);
}
/* PL_tainted must be correctly set for this mg_set */
SvSETMAGIC(TARG);
TAINT_NOT;
LEAVE_SCOPE(cx->sb_oldsave);
POPSUBST(cx);
PERL_ASYNC_CHECK();
RETURNOP(pm->op_next);
NOT_REACHED; /* NOTREACHED */
}
cx->sb_iters = saviters;
}
if (RX_MATCH_COPIED(rx) && RX_SUBBEG(rx) != orig) {
m = s;
s = orig;
assert(!RX_SUBOFFSET(rx));
cx->sb_orig = orig = RX_SUBBEG(rx);
s = orig + (m - s);
cx->sb_strend = s + (cx->sb_strend - m);
}
cx->sb_m = m = RX_OFFS(rx)[0].start + orig;
if (m > s) {
if (DO_UTF8(dstr) && !SvUTF8(cx->sb_targ))
sv_catpvn_nomg_utf8_upgrade(dstr, s, m - s, nsv);
else
sv_catpvn_nomg(dstr, s, m-s);
}
cx->sb_s = RX_OFFS(rx)[0].end + orig;
{ /* Update the pos() information. */
SV * const sv
= (pm->op_pmflags & PMf_NONDESTRUCT) ? cx->sb_dstr : cx->sb_targ;
MAGIC *mg;
if (!(mg = mg_find_mglob(sv))) {
mg = sv_magicext_mglob(sv);
}
assert(SvPOK(sv));
MgBYTEPOS_set(mg, sv, SvPVX(sv), m - orig);
}
if (old != rx)
(void)ReREFCNT_inc(rx);
/* update the taint state of various various variables in preparation
* for calling the code block.
* See "how taint works" above pp_subst() */
if (TAINTING_get) {
if (RX_MATCH_TAINTED(rx)) /* run time pattern taint, eg locale */
cx->sb_rxtainted |= SUBST_TAINT_PAT;
if ((cx->sb_rxtainted & SUBST_TAINT_PAT) ||
((cx->sb_rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_RETAINT))
== (SUBST_TAINT_STR|SUBST_TAINT_RETAINT))
)
(RX_MATCH_TAINTED_on(rx)); /* taint $1 et al */
if (cx->sb_iters > 1 && (cx->sb_rxtainted &
(SUBST_TAINT_STR|SUBST_TAINT_PAT|SUBST_TAINT_REPL)))
SvTAINTED_on((pm->op_pmflags & PMf_NONDESTRUCT)
? cx->sb_dstr : cx->sb_targ);
TAINT_NOT;
}
rxres_save(&cx->sb_rxres, rx);
PL_curpm = pm;
RETURNOP(pm->op_pmstashstartu.op_pmreplstart);
}
void
Perl_rxres_save(pTHX_ void **rsp, REGEXP *rx)
{
UV *p = (UV*)*rsp;
U32 i;
PERL_ARGS_ASSERT_RXRES_SAVE;
PERL_UNUSED_CONTEXT;
if (!p || p[1] < RX_NPARENS(rx)) {
#ifdef PERL_ANY_COW
i = 7 + (RX_NPARENS(rx)+1) * 2;
#else
i = 6 + (RX_NPARENS(rx)+1) * 2;
#endif
if (!p)
Newx(p, i, UV);
else
Renew(p, i, UV);
*rsp = (void*)p;
}
/* what (if anything) to free on croak */
*p++ = PTR2UV(RX_MATCH_COPIED(rx) ? RX_SUBBEG(rx) : NULL);
RX_MATCH_COPIED_off(rx);
*p++ = RX_NPARENS(rx);
#ifdef PERL_ANY_COW
*p++ = PTR2UV(RX_SAVED_COPY(rx));
RX_SAVED_COPY(rx) = NULL;
#endif
*p++ = PTR2UV(RX_SUBBEG(rx));
*p++ = (UV)RX_SUBLEN(rx);
*p++ = (UV)RX_SUBOFFSET(rx);
*p++ = (UV)RX_SUBCOFFSET(rx);
for (i = 0; i <= RX_NPARENS(rx); ++i) {
*p++ = (UV)RX_OFFS(rx)[i].start;
*p++ = (UV)RX_OFFS(rx)[i].end;
}
}
static void
S_rxres_restore(pTHX_ void **rsp, REGEXP *rx)
{
UV *p = (UV*)*rsp;
U32 i;
PERL_ARGS_ASSERT_RXRES_RESTORE;
PERL_UNUSED_CONTEXT;
RX_MATCH_COPY_FREE(rx);
RX_MATCH_COPIED_set(rx, *p);
*p++ = 0;
RX_NPARENS(rx) = *p++;
#ifdef PERL_ANY_COW
if (RX_SAVED_COPY(rx))
SvREFCNT_dec (RX_SAVED_COPY(rx));
RX_SAVED_COPY(rx) = INT2PTR(SV*,*p);
*p++ = 0;
#endif
RX_SUBBEG(rx) = INT2PTR(char*,*p++);
RX_SUBLEN(rx) = (I32)(*p++);
RX_SUBOFFSET(rx) = (I32)*p++;
RX_SUBCOFFSET(rx) = (I32)*p++;
for (i = 0; i <= RX_NPARENS(rx); ++i) {
RX_OFFS(rx)[i].start = (I32)(*p++);
RX_OFFS(rx)[i].end = (I32)(*p++);
}
}
static void
S_rxres_free(pTHX_ void **rsp)
{
UV * const p = (UV*)*rsp;
PERL_ARGS_ASSERT_RXRES_FREE;
PERL_UNUSED_CONTEXT;
if (p) {
void *tmp = INT2PTR(char*,*p);
#ifdef PERL_POISON
#ifdef PERL_ANY_COW
U32 i = 9 + p[1] * 2;
#else
U32 i = 8 + p[1] * 2;
#endif
#endif
#ifdef PERL_ANY_COW
SvREFCNT_dec (INT2PTR(SV*,p[2]));
#endif
#ifdef PERL_POISON
PoisonFree(p, i, sizeof(UV));
#endif
Safefree(tmp);
Safefree(p);
*rsp = NULL;
}
}
#define FORM_NUM_BLANK (1<<30)
#define FORM_NUM_POINT (1<<29)
PP(pp_formline)
{
dSP; dMARK; dORIGMARK;
SV * const tmpForm = *++MARK;
SV *formsv; /* contains text of original format */
U32 *fpc; /* format ops program counter */
char *t; /* current append position in target string */
const char *f; /* current position in format string */
I32 arg;
SV *sv = NULL; /* current item */
const char *item = NULL;/* string value of current item */
I32 itemsize = 0; /* length (chars) of item, possibly truncated */
I32 itembytes = 0; /* as itemsize, but length in bytes */
I32 fieldsize = 0; /* width of current field */
I32 lines = 0; /* number of lines that have been output */
bool chopspace = (strchr(PL_chopset, ' ') != NULL); /* does $: have space */
const char *chophere = NULL; /* where to chop current item */
STRLEN linemark = 0; /* pos of start of line in output */
NV value;
bool gotsome = FALSE; /* seen at least one non-blank item on this line */
STRLEN len; /* length of current sv */
STRLEN linemax; /* estimate of output size in bytes */
bool item_is_utf8 = FALSE;
bool targ_is_utf8 = FALSE;
const char *fmt;
MAGIC *mg = NULL;
U8 *source; /* source of bytes to append */
STRLEN to_copy; /* how may bytes to append */
char trans; /* what chars to translate */
mg = doparseform(tmpForm);
fpc = (U32*)mg->mg_ptr;
/* the actual string the format was compiled from.
* with overload etc, this may not match tmpForm */
formsv = mg->mg_obj;
SvPV_force(PL_formtarget, len);
if (SvTAINTED(tmpForm) || SvTAINTED(formsv))
SvTAINTED_on(PL_formtarget);
if (DO_UTF8(PL_formtarget))
targ_is_utf8 = TRUE;
linemax = (SvCUR(formsv) * (IN_BYTES ? 1 : 3) + 1);
t = SvGROW(PL_formtarget, len + linemax + 1);
/* XXX from now onwards, SvCUR(PL_formtarget) is invalid */
t += len;
f = SvPV_const(formsv, len);
for (;;) {
DEBUG_f( {
const char *name = "???";
arg = -1;
switch (*fpc) {
case FF_LITERAL: arg = fpc[1]; name = "LITERAL"; break;
case FF_BLANK: arg = fpc[1]; name = "BLANK"; break;
case FF_SKIP: arg = fpc[1]; name = "SKIP"; break;
case FF_FETCH: arg = fpc[1]; name = "FETCH"; break;
case FF_DECIMAL: arg = fpc[1]; name = "DECIMAL"; break;
case FF_CHECKNL: name = "CHECKNL"; break;
case FF_CHECKCHOP: name = "CHECKCHOP"; break;
case FF_SPACE: name = "SPACE"; break;
case FF_HALFSPACE: name = "HALFSPACE"; break;
case FF_ITEM: name = "ITEM"; break;
case FF_CHOP: name = "CHOP"; break;
case FF_LINEGLOB: name = "LINEGLOB"; break;
case FF_NEWLINE: name = "NEWLINE"; break;
case FF_MORE: name = "MORE"; break;
case FF_LINEMARK: name = "LINEMARK"; break;
case FF_END: name = "END"; break;
case FF_0DECIMAL: name = "0DECIMAL"; break;
case FF_LINESNGL: name = "LINESNGL"; break;
}
if (arg >= 0)
PerlIO_printf(Perl_debug_log, "%-16s%ld\n", name, (long) arg);
else
PerlIO_printf(Perl_debug_log, "%-16s\n", name);
} );
switch (*fpc++) {
case FF_LINEMARK: /* start (or end) of a line */
linemark = t - SvPVX(PL_formtarget);
lines++;
gotsome = FALSE;
break;
case FF_LITERAL: /* append <arg> literal chars */
to_copy = *fpc++;
source = (U8 *)f;
f += to_copy;
trans = '~';
item_is_utf8 = targ_is_utf8 ? !!DO_UTF8(formsv) : !!SvUTF8(formsv);
goto append;
case FF_SKIP: /* skip <arg> chars in format */
f += *fpc++;
break;
case FF_FETCH: /* get next item and set field size to <arg> */
arg = *fpc++;
f += arg;
fieldsize = arg;
if (MARK < SP)
sv = *++MARK;
else {
sv = &PL_sv_no;
Perl_ck_warner(aTHX_ packWARN(WARN_SYNTAX), "Not enough format arguments");
}
if (SvTAINTED(sv))
SvTAINTED_on(PL_formtarget);
break;
case FF_CHECKNL: /* find max len of item (up to \n) that fits field */
{
const char *s = item = SvPV_const(sv, len);
const char *send = s + len;
itemsize = 0;
item_is_utf8 = DO_UTF8(sv);
while (s < send) {
if (!isCNTRL(*s))
gotsome = TRUE;
else if (*s == '\n')
break;
if (item_is_utf8)
s += UTF8SKIP(s);
else
s++;
itemsize++;
if (itemsize == fieldsize)
break;
}
itembytes = s - item;
chophere = s;
break;
}
case FF_CHECKCHOP: /* like CHECKNL, but up to highest split point */
{
const char *s = item = SvPV_const(sv, len);
const char *send = s + len;
I32 size = 0;
chophere = NULL;
item_is_utf8 = DO_UTF8(sv);
while (s < send) {
/* look for a legal split position */
if (isSPACE(*s)) {
if (*s == '\r') {
chophere = s;
itemsize = size;
break;
}
if (chopspace) {
/* provisional split point */
chophere = s;
itemsize = size;
}
/* we delay testing fieldsize until after we've
* processed the possible split char directly
* following the last field char; so if fieldsize=3
* and item="a b cdef", we consume "a b", not "a".
* Ditto further down.
*/
if (size == fieldsize)
break;
}
else {
if (strchr(PL_chopset, *s)) {
/* provisional split point */
/* for a non-space split char, we include
* the split char; hence the '+1' */
chophere = s + 1;
itemsize = size;
}
if (size == fieldsize)
break;
if (!isCNTRL(*s))
gotsome = TRUE;
}
if (item_is_utf8)
s += UTF8SKIP(s);
else
s++;
size++;
}
if (!chophere || s == send) {
chophere = s;
itemsize = size;
}
itembytes = chophere - item;
break;
}
case FF_SPACE: /* append padding space (diff of field, item size) */
arg = fieldsize - itemsize;
if (arg) {
fieldsize -= arg;
while (arg-- > 0)
*t++ = ' ';
}
break;
case FF_HALFSPACE: /* like FF_SPACE, but only append half as many */
arg = fieldsize - itemsize;
if (arg) {
arg /= 2;
fieldsize -= arg;
while (arg-- > 0)
*t++ = ' ';
}
break;
case FF_ITEM: /* append a text item, while blanking ctrl chars */
to_copy = itembytes;
source = (U8 *)item;
trans = 1;
goto append;
case FF_CHOP: /* (for ^*) chop the current item */
if (sv != &PL_sv_no) {
const char *s = chophere;
if (chopspace) {
while (isSPACE(*s))
s++;
}
if (SvPOKp(sv))
sv_chop(sv,s);
else
/* tied, overloaded or similar strangeness.
* Do it the hard way */
sv_setpvn(sv, s, len - (s-item));
SvSETMAGIC(sv);
break;
}
case FF_LINESNGL: /* process ^* */
chopspace = 0;
/* FALLTHROUGH */
case FF_LINEGLOB: /* process @* */
{
const bool oneline = fpc[-1] == FF_LINESNGL;
const char *s = item = SvPV_const(sv, len);
const char *const send = s + len;
item_is_utf8 = DO_UTF8(sv);
chophere = s + len;
if (!len)
break;
trans = 0;
gotsome = TRUE;
source = (U8 *) s;
to_copy = len;
while (s < send) {
if (*s++ == '\n') {
if (oneline) {
to_copy = s - item - 1;
chophere = s;
break;
} else {
if (s == send) {
to_copy--;
} else
lines++;
}
}
}
}
append:
/* append to_copy bytes from source to PL_formstring.
* item_is_utf8 implies source is utf8.
* if trans, translate certain characters during the copy */
{
U8 *tmp = NULL;
STRLEN grow = 0;
SvCUR_set(PL_formtarget,
t - SvPVX_const(PL_formtarget));
if (targ_is_utf8 && !item_is_utf8) {
source = tmp = bytes_to_utf8(source, &to_copy);
} else {
if (item_is_utf8 && !targ_is_utf8) {
U8 *s;
/* Upgrade targ to UTF8, and then we reduce it to
a problem we have a simple solution for.
Don't need get magic. */
sv_utf8_upgrade_nomg(PL_formtarget);
targ_is_utf8 = TRUE;
/* re-calculate linemark */
s = (U8*)SvPVX(PL_formtarget);
/* the bytes we initially allocated to append the
* whole line may have been gobbled up during the
* upgrade, so allocate a whole new line's worth
* for safety */
grow = linemax;
while (linemark--)
s += UTF8SKIP(s);
linemark = s - (U8*)SvPVX(PL_formtarget);
}
/* Easy. They agree. */
assert (item_is_utf8 == targ_is_utf8);
}
if (!trans)
/* @* and ^* are the only things that can exceed
* the linemax, so grow by the output size, plus
* a whole new form's worth in case of any further
* output */
grow = linemax + to_copy;
if (grow)
SvGROW(PL_formtarget, SvCUR(PL_formtarget) + grow + 1);
t = SvPVX(PL_formtarget) + SvCUR(PL_formtarget);
Copy(source, t, to_copy, char);
if (trans) {
/* blank out ~ or control chars, depending on trans.
* works on bytes not chars, so relies on not
* matching utf8 continuation bytes */
U8 *s = (U8*)t;
U8 *send = s + to_copy;
while (s < send) {
const int ch = *s;
if (trans == '~' ? (ch == '~') : isCNTRL(ch))
*s = ' ';
s++;
}
}
t += to_copy;
SvCUR_set(PL_formtarget, SvCUR(PL_formtarget) + to_copy);
if (tmp)
Safefree(tmp);
break;
}
case FF_0DECIMAL: /* like FF_DECIMAL but for 0### */
arg = *fpc++;
fmt = (const char *)
((arg & FORM_NUM_POINT) ? "%#0*.*" NVff : "%0*.*" NVff);
goto ff_dec;
case FF_DECIMAL: /* do @##, ^##, where <arg>=(precision|flags) */
arg = *fpc++;
fmt = (const char *)
((arg & FORM_NUM_POINT) ? "%#*.*" NVff : "%*.*" NVff);
ff_dec:
/* If the field is marked with ^ and the value is undefined,
blank it out. */
if ((arg & FORM_NUM_BLANK) && !SvOK(sv)) {
arg = fieldsize;
while (arg--)
*t++ = ' ';
break;
}
gotsome = TRUE;
value = SvNV(sv);
/* overflow evidence */
if (num_overflow(value, fieldsize, arg)) {
arg = fieldsize;
while (arg--)
*t++ = '#';
break;
}
/* Formats aren't yet marked for locales, so assume "yes". */
{
Size_t max = SvLEN(PL_formtarget) - (t - SvPVX(PL_formtarget));
int len;
DECLARE_STORE_LC_NUMERIC_SET_TO_NEEDED();
arg &= ~(FORM_NUM_POINT|FORM_NUM_BLANK);
#ifdef USE_QUADMATH
{
const char* qfmt = quadmath_format_single(fmt);
int len;
if (!qfmt)
Perl_croak_nocontext("panic: quadmath invalid format \"%s\"", fmt);
len = quadmath_snprintf(t, max, qfmt, (int) fieldsize, (int) arg, value);
if (len == -1)
Perl_croak_nocontext("panic: quadmath_snprintf failed, format \"%s\"", qfmt);
if (qfmt != fmt)
Safefree(fmt);
}
#else
/* we generate fmt ourselves so it is safe */
GCC_DIAG_IGNORE(-Wformat-nonliteral);
len = my_snprintf(t, max, fmt, (int) fieldsize, (int) arg, value);
GCC_DIAG_RESTORE;
#endif
PERL_MY_SNPRINTF_POST_GUARD(len, max);
RESTORE_LC_NUMERIC();
}
t += fieldsize;
break;
case FF_NEWLINE: /* delete trailing spaces, then append \n */
f++;
while (t-- > (SvPVX(PL_formtarget) + linemark) && *t == ' ') ;
t++;
*t++ = '\n';
break;
case FF_BLANK: /* for arg==0: do '~'; for arg>0 : do '~~' */
arg = *fpc++;
if (gotsome) {
if (arg) { /* repeat until fields exhausted? */
fpc--;
goto end;
}
}
else {
t = SvPVX(PL_formtarget) + linemark;
lines--;
}
break;
case FF_MORE: /* replace long end of string with '...' */
{
const char *s = chophere;
const char *send = item + len;
if (chopspace) {
while (isSPACE(*s) && (s < send))
s++;
}
if (s < send) {
char *s1;
arg = fieldsize - itemsize;
if (arg) {
fieldsize -= arg;
while (arg-- > 0)
*t++ = ' ';
}
s1 = t - 3;
if (strnEQ(s1," ",3)) {
while (s1 > SvPVX_const(PL_formtarget) && isSPACE(s1[-1]))
s1--;
}
*s1++ = '.';
*s1++ = '.';
*s1++ = '.';
}
break;
}
case FF_END: /* tidy up, then return */
end:
assert(t < SvPVX_const(PL_formtarget) + SvLEN(PL_formtarget));
*t = '\0';
SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
if (targ_is_utf8)
SvUTF8_on(PL_formtarget);
FmLINES(PL_formtarget) += lines;
SP = ORIGMARK;
if (fpc[-1] == FF_BLANK)
RETURNOP(cLISTOP->op_first);
else
RETPUSHYES;
}
}
}
PP(pp_grepstart)
{
dSP;
SV *src;
if (PL_stack_base + *PL_markstack_ptr == SP) {
(void)POPMARK;
if (GIMME_V == G_SCALAR)
mXPUSHi(0);
RETURNOP(PL_op->op_next->op_next);
}
PL_stack_sp = PL_stack_base + *PL_markstack_ptr + 1;
Perl_pp_pushmark(aTHX); /* push dst */
Perl_pp_pushmark(aTHX); /* push src */
ENTER_with_name("grep"); /* enter outer scope */
SAVETMPS;
if (PL_op->op_private & OPpGREP_LEX)
SAVESPTR(PAD_SVl(PL_op->op_targ));
else
SAVE_DEFSV;
ENTER_with_name("grep_item"); /* enter inner scope */
SAVEVPTR(PL_curpm);
src = PL_stack_base[*PL_markstack_ptr];
if (SvPADTMP(src)) {
src = PL_stack_base[*PL_markstack_ptr] = sv_mortalcopy(src);
PL_tmps_floor++;
}
SvTEMP_off(src);
if (PL_op->op_private & OPpGREP_LEX)
PAD_SVl(PL_op->op_targ) = src;
else
DEFSV_set(src);
PUTBACK;
if (PL_op->op_type == OP_MAPSTART)
Perl_pp_pushmark(aTHX); /* push top */
return ((LOGOP*)PL_op->op_next)->op_other;
}
PP(pp_mapwhile)
{
dSP;
const I32 gimme = GIMME_V;
I32 items = (SP - PL_stack_base) - *PL_markstack_ptr; /* how many new items */
I32 count;
I32 shift;
SV** src;
SV** dst;
/* first, move source pointer to the next item in the source list */
++PL_markstack_ptr[-1];
/* if there are new items, push them into the destination list */
if (items && gimme != G_VOID) {
/* might need to make room back there first */
if (items > PL_markstack_ptr[-1] - PL_markstack_ptr[-2]) {
/* XXX this implementation is very pessimal because the stack
* is repeatedly extended for every set of items. Is possible
* to do this without any stack extension or copying at all
* by maintaining a separate list over which the map iterates
* (like foreach does). --gsar */
/* everything in the stack after the destination list moves
* towards the end the stack by the amount of room needed */
shift = items - (PL_markstack_ptr[-1] - PL_markstack_ptr[-2]);
/* items to shift up (accounting for the moved source pointer) */
count = (SP - PL_stack_base) - (PL_markstack_ptr[-1] - 1);
/* This optimization is by Ben Tilly and it does
* things differently from what Sarathy (gsar)
* is describing. The downside of this optimization is
* that leaves "holes" (uninitialized and hopefully unused areas)
* to the Perl stack, but on the other hand this
* shouldn't be a problem. If Sarathy's idea gets
* implemented, this optimization should become
* irrelevant. --jhi */
if (shift < count)
shift = count; /* Avoid shifting too often --Ben Tilly */
EXTEND(SP,shift);
src = SP;
dst = (SP += shift);
PL_markstack_ptr[-1] += shift;
*PL_markstack_ptr += shift;
while (count--)
*dst-- = *src--;
}
/* copy the new items down to the destination list */
dst = PL_stack_base + (PL_markstack_ptr[-2] += items) - 1;
if (gimme == G_ARRAY) {
/* add returned items to the collection (making mortal copies
* if necessary), then clear the current temps stack frame
* *except* for those items. We do this splicing the items
* into the start of the tmps frame (so some items may be on
* the tmps stack twice), then moving PL_tmps_floor above
* them, then freeing the frame. That way, the only tmps that
* accumulate over iterations are the return values for map.
* We have to do to this way so that everything gets correctly
* freed if we die during the map.
*/
I32 tmpsbase;
I32 i = items;
/* make space for the slice */
EXTEND_MORTAL(items);
tmpsbase = PL_tmps_floor + 1;
Move(PL_tmps_stack + tmpsbase,
PL_tmps_stack + tmpsbase + items,
PL_tmps_ix - PL_tmps_floor,
SV*);
PL_tmps_ix += items;
while (i-- > 0) {
SV *sv = POPs;
if (!SvTEMP(sv))
sv = sv_mortalcopy(sv);
*dst-- = sv;
PL_tmps_stack[tmpsbase++] = SvREFCNT_inc_simple(sv);
}
/* clear the stack frame except for the items */
PL_tmps_floor += items;
FREETMPS;
/* FREETMPS may have cleared the TEMP flag on some of the items */
i = items;
while (i-- > 0)
SvTEMP_on(PL_tmps_stack[--tmpsbase]);
}
else {
/* scalar context: we don't care about which values map returns
* (we use undef here). And so we certainly don't want to do mortal
* copies of meaningless values. */
while (items-- > 0) {
(void)POPs;
*dst-- = &PL_sv_undef;
}
FREETMPS;
}
}
else {
FREETMPS;
}
LEAVE_with_name("grep_item"); /* exit inner scope */
/* All done yet? */
if (PL_markstack_ptr[-1] > *PL_markstack_ptr) {
(void)POPMARK; /* pop top */
LEAVE_with_name("grep"); /* 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) {
if (PL_op->op_private & OPpGREP_LEX) {
SV* sv = sv_newmortal();
sv_setiv(sv, items);
PUSHs(sv);
}
else {
dTARGET;
XPUSHi(items);
}
}
else if (gimme == G_ARRAY)
SP += items;
RETURN;
}
else {
SV *src;
ENTER_with_name("grep_item"); /* enter inner scope */
SAVEVPTR(PL_curpm);
/* set $_ to the new source item */
src = PL_stack_base[PL_markstack_ptr[-1]];
if (SvPADTMP(src)) {
src = sv_mortalcopy(src);
}
SvTEMP_off(src);
if (PL_op->op_private & OPpGREP_LEX)
PAD_SVl(PL_op->op_targ) = src;
else
DEFSV_set(src);
RETURNOP(cLOGOP->op_other);
}
}
/* Range stuff. */
PP(pp_range)
{
if (GIMME_V == G_ARRAY)
return NORMAL;
if (SvTRUEx(PAD_SV(PL_op->op_targ)))
return cLOGOP->op_other;
else
return NORMAL;
}
PP(pp_flip)
{
dSP;
if (GIMME_V == G_ARRAY) {
RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
}
else {
dTOPss;
SV * const targ = PAD_SV(PL_op->op_targ);
int flip = 0;
if (PL_op->op_private & OPpFLIP_LINENUM) {
if (GvIO(PL_last_in_gv)) {
flip = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
}
else {
GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV);
if (gv && GvSV(gv))
flip = SvIV(sv) == SvIV(GvSV(gv));
}
} else {
flip = SvTRUE(sv);
}
if (flip) {
sv_setiv(PAD_SV(cUNOP->op_first->op_targ), 1);
if (PL_op->op_flags & OPf_SPECIAL) {
sv_setiv(targ, 1);
SETs(targ);
RETURN;
}
else {
sv_setiv(targ, 0);
SP--;
RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
}
}
sv_setpvs(TARG, "");
SETs(targ);
RETURN;
}
}
/* This code tries to decide if "$left .. $right" should use the
magical string increment, or if the range is numeric (we make
an exception for .."0" [#18165]). AMS 20021031. */
#define RANGE_IS_NUMERIC(left,right) ( \
SvNIOKp(left) || (SvOK(left) && !SvPOKp(left)) || \
SvNIOKp(right) || (SvOK(right) && !SvPOKp(right)) || \
(((!SvOK(left) && SvOK(right)) || ((!SvOK(left) || \
looks_like_number(left)) && SvPOKp(left) && *SvPVX_const(left) != '0')) \
&& (!SvOK(right) || looks_like_number(right))))
PP(pp_flop)
{
dSP;
if (GIMME_V == G_ARRAY) {
dPOPPOPssrl;
SvGETMAGIC(left);
SvGETMAGIC(right);
if (RANGE_IS_NUMERIC(left,right)) {
IV i, j, n;
if ((SvOK(left) && !SvIOK(left) && SvNV_nomg(left) < IV_MIN) ||
(SvOK(right) && (SvIOK(right)
? SvIsUV(right) && SvUV(right) > IV_MAX
: SvNV_nomg(right) > IV_MAX)))
DIE(aTHX_ "Range iterator outside integer range");
i = SvIV_nomg(left);
j = SvIV_nomg(right);
if (j >= i) {
/* Dance carefully around signed max. */
bool overflow = (i <= 0 && j > SSize_t_MAX + i - 1);
if (!overflow) {
n = j - i + 1;
/* The wraparound of signed integers is undefined
* behavior, but here we aim for count >=1, and
* negative count is just wrong. */
if (n < 1)
overflow = TRUE;
}
if (overflow)
Perl_croak(aTHX_ "Out of memory during list extend");
EXTEND_MORTAL(n);
EXTEND(SP, n);
}
else
n = 0;
while (n--) {
SV * const sv = sv_2mortal(newSViv(i));
PUSHs(sv);
if (n) /* avoid incrementing above IV_MAX */
i++;
}
}
else {
STRLEN len, llen;
const char * const lpv = SvPV_nomg_const(left, llen);
const char * const tmps = SvPV_nomg_const(right, len);
SV *sv = newSVpvn_flags(lpv, llen, SvUTF8(left)|SVs_TEMP);
while (!SvNIOKp(sv) && SvCUR(sv) <= len) {
XPUSHs(sv);
if (strEQ(SvPVX_const(sv),tmps))
break;
sv = sv_2mortal(newSVsv(sv));
sv_inc(sv);
}
}
}
else {
dTOPss;
SV * const targ = PAD_SV(cUNOP->op_first->op_targ);
int flop = 0;
sv_inc(targ);
if (PL_op->op_private & OPpFLIP_LINENUM) {
if (GvIO(PL_last_in_gv)) {
flop = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
}
else {
GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV);
if (gv && GvSV(gv)) flop = SvIV(sv) == SvIV(GvSV(gv));
}
}
else {
flop = SvTRUE(sv);
}
if (flop) {
sv_setiv(PAD_SV(((UNOP*)cUNOP->op_first)->op_first->op_targ), 0);
sv_catpvs(targ, "E0");
}
SETs(targ);
}
RETURN;
}
/* Control. */
static const char * const context_name[] = {
"pseudo-block",
NULL, /* CXt_WHEN never actually needs "block" */
NULL, /* CXt_BLOCK never actually needs "block" */
NULL, /* CXt_GIVEN never actually needs "block" */
NULL, /* CXt_LOOP_FOR never actually needs "loop" */
NULL, /* CXt_LOOP_PLAIN never actually needs "loop" */
NULL, /* CXt_LOOP_LAZYSV never actually needs "loop" */
NULL, /* CXt_LOOP_LAZYIV never actually needs "loop" */
"subroutine",
"format",
"eval",
"substitution",
};
STATIC I32
S_dopoptolabel(pTHX_ const char *label, STRLEN len, U32 flags)
{
I32 i;
PERL_ARGS_ASSERT_DOPOPTOLABEL;
for (i = cxstack_ix; i >= 0; i--) {
const PERL_CONTEXT * const cx = &cxstack[i];
switch (CxTYPE(cx)) {
case CXt_SUBST:
case CXt_SUB:
case CXt_FORMAT:
case CXt_EVAL:
case CXt_NULL:
/* diag_listed_as: Exiting subroutine via %s */
Perl_ck_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
context_name[CxTYPE(cx)], OP_NAME(PL_op));
if (CxTYPE(cx) == CXt_NULL)
return -1;
break;
case CXt_LOOP_LAZYIV:
case CXt_LOOP_LAZYSV:
case CXt_LOOP_FOR:
case CXt_LOOP_PLAIN:
{
STRLEN cx_label_len = 0;
U32 cx_label_flags = 0;
const char *cx_label = CxLABEL_len_flags(cx, &cx_label_len, &cx_label_flags);
if (!cx_label || !(
( (cx_label_flags & SVf_UTF8) != (flags & SVf_UTF8) ) ?
(flags & SVf_UTF8)
? (bytes_cmp_utf8(
(const U8*)cx_label, cx_label_len,
(const U8*)label, len) == 0)
: (bytes_cmp_utf8(
(const U8*)label, len,
(const U8*)cx_label, cx_label_len) == 0)
: (len == cx_label_len && ((cx_label == label)
|| memEQ(cx_label, label, len))) )) {
DEBUG_l(Perl_deb(aTHX_ "(poptolabel(): skipping label at cx=%ld %s)\n",
(long)i, cx_label));
continue;
}
DEBUG_l( Perl_deb(aTHX_ "(poptolabel(): found label at cx=%ld %s)\n", (long)i, label));
return i;
}
}
}
return i;
}
I32
Perl_dowantarray(pTHX)
{
const I32 gimme = block_gimme();
return (gimme == G_VOID) ? G_SCALAR : gimme;
}
I32
Perl_block_gimme(pTHX)
{
const I32 cxix = dopoptosub(cxstack_ix);
if (cxix < 0)
return G_VOID;
switch (cxstack[cxix].blk_gimme) {
case G_VOID:
return G_VOID;
case G_SCALAR:
return G_SCALAR;
case G_ARRAY:
return G_ARRAY;
default:
Perl_croak(aTHX_ "panic: bad gimme: %d\n", cxstack[cxix].blk_gimme);
}
NOT_REACHED; /* NOTREACHED */
}
I32
Perl_is_lvalue_sub(pTHX)
{
const I32 cxix = dopoptosub(cxstack_ix);
assert(cxix >= 0); /* We should only be called from inside subs */
if (CxLVAL(cxstack + cxix) && CvLVALUE(cxstack[cxix].blk_sub.cv))
return CxLVAL(cxstack + cxix);
else
return 0;
}
/* only used by PUSHSUB */
I32
Perl_was_lvalue_sub(pTHX)
{
const I32 cxix = dopoptosub(cxstack_ix-1);
assert(cxix >= 0); /* We should only be called from inside subs */
if (CxLVAL(cxstack + cxix) && CvLVALUE(cxstack[cxix].blk_sub.cv))
return CxLVAL(cxstack + cxix);
else
return 0;
}
STATIC I32
S_dopoptosub_at(pTHX_ const PERL_CONTEXT *cxstk, I32 startingblock)
{
I32 i;
PERL_ARGS_ASSERT_DOPOPTOSUB_AT;
#ifndef DEBUGGING
PERL_UNUSED_CONTEXT;
#endif
for (i = startingblock; i >= 0; i--) {
const PERL_CONTEXT * const cx = &cxstk[i];
switch (CxTYPE(cx)) {
default:
continue;
case CXt_SUB:
/* in sub foo { /(?{...})/ }, foo ends up on the CX stack
* twice; the first for the normal foo() call, and the second
* for a faked up re-entry into the sub to execute the
* code block. Hide this faked entry from the world. */
if (cx->cx_type & CXp_SUB_RE_FAKE)
continue;
/* FALLTHROUGH */
case CXt_EVAL:
case CXt_FORMAT:
DEBUG_l( Perl_deb(aTHX_ "(dopoptosub_at(): found sub at cx=%ld)\n", (long)i));
return i;
}
}
return i;
}
STATIC I32
S_dopoptoeval(pTHX_ I32 startingblock)
{
I32 i;
for (i = startingblock; i >= 0; i--) {
const PERL_CONTEXT *cx = &cxstack[i];
switch (CxTYPE(cx)) {
default:
continue;
case CXt_EVAL:
DEBUG_l( Perl_deb(aTHX_ "(dopoptoeval(): found eval at cx=%ld)\n", (long)i));
return i;
}
}
return i;
}
STATIC I32
S_dopoptoloop(pTHX_ I32 startingblock)
{
I32 i;
for (i = startingblock; i >= 0; i--) {
const PERL_CONTEXT * const cx = &cxstack[i];
switch (CxTYPE(cx)) {
case CXt_SUBST:
case CXt_SUB:
case CXt_FORMAT:
case CXt_EVAL:
case CXt_NULL:
/* diag_listed_as: Exiting subroutine via %s */
Perl_ck_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
context_name[CxTYPE(cx)], OP_NAME(PL_op));
if ((CxTYPE(cx)) == CXt_NULL)
return -1;
break;
case CXt_LOOP_LAZYIV:
case CXt_LOOP_LAZYSV:
case CXt_LOOP_FOR:
case CXt_LOOP_PLAIN:
DEBUG_l( Perl_deb(aTHX_ "(dopoptoloop(): found loop at cx=%ld)\n", (long)i));
return i;
}
}
return i;
}
STATIC I32
S_dopoptogiven(pTHX_ I32 startingblock)
{
I32 i;
for (i = startingblock; i >= 0; i--) {
const PERL_CONTEXT *cx = &cxstack[i];
switch (CxTYPE(cx)) {
default:
continue;
case CXt_GIVEN:
DEBUG_l( Perl_deb(aTHX_ "(dopoptogiven(): found given at cx=%ld)\n", (long)i));
return i;
case CXt_LOOP_PLAIN:
assert(!CxFOREACHDEF(cx));
break;
case CXt_LOOP_LAZYIV:
case CXt_LOOP_LAZYSV:
case CXt_LOOP_FOR:
if (CxFOREACHDEF(cx)) {
DEBUG_l( Perl_deb(aTHX_ "(dopoptogiven(): found foreach at cx=%ld)\n", (long)i));
return i;
}
}
}
return i;
}
STATIC I32
S_dopoptowhen(pTHX_ I32 startingblock)
{
I32 i;
for (i = startingblock; i >= 0; i--) {
const PERL_CONTEXT *cx = &cxstack[i];
switch (CxTYPE(cx)) {
default:
continue;
case CXt_WHEN:
DEBUG_l( Perl_deb(aTHX_ "(dopoptowhen(): found when at cx=%ld)\n", (long)i));
return i;
}
}
return i;
}
void
Perl_dounwind(pTHX_ I32 cxix)
{
I32 optype;
if (!PL_curstackinfo) /* can happen if die during thread cloning */
return;
while (cxstack_ix > cxix) {
SV *sv;
PERL_CONTEXT *cx = &cxstack[cxstack_ix];
DEBUG_CX("UNWIND"); \
/* Note: we don't need to restore the base context info till the end. */
switch (CxTYPE(cx)) {
case CXt_SUBST:
POPSUBST(cx);
continue; /* not break */
case CXt_SUB:
POPSUB(cx,sv);
LEAVESUB(sv);
break;
case CXt_EVAL:
POPEVAL(cx);
break;
case CXt_LOOP_LAZYIV:
case CXt_LOOP_LAZYSV:
case CXt_LOOP_FOR:
case CXt_LOOP_PLAIN:
POPLOOP(cx);
break;
case CXt_NULL:
break;
case CXt_FORMAT:
POPFORMAT(cx);
break;
}
cxstack_ix--;
}
PERL_UNUSED_VAR(optype);
}
void
Perl_qerror(pTHX_ SV *err)
{
PERL_ARGS_ASSERT_QERROR;
if (PL_in_eval) {
if (PL_in_eval & EVAL_KEEPERR) {
Perl_ck_warner(aTHX_ packWARN(WARN_MISC), "\t(in cleanup) %"SVf,
SVfARG(err));
}
else
sv_catsv(ERRSV, err);
}
else if (PL_errors)
sv_catsv(PL_errors, err);
else
Perl_warn(aTHX_ "%"SVf, SVfARG(err));
if (PL_parser)
++PL_parser->error_count;
}
void
Perl_die_unwind(pTHX_ SV *msv)
{
SV *exceptsv = sv_mortalcopy(msv);
U8 in_eval = PL_in_eval;
PERL_ARGS_ASSERT_DIE_UNWIND;
if (in_eval) {
I32 cxix;
I32 gimme;
/*
* Historically, perl used to set ERRSV ($@) early in the die
* process and rely on it not getting clobbered during unwinding.
* That sucked, because it was liable to get clobbered, so the
* setting of ERRSV used to emit the exception from eval{} has
* been moved to much later, after unwinding (see just before
* JMPENV_JUMP below). However, some modules were relying on the
* early setting, by examining $@ during unwinding to use it as
* a flag indicating whether the current unwinding was caused by
* an exception. It was never a reliable flag for that purpose,
* being totally open to false positives even without actual
* clobberage, but was useful enough for production code to
* semantically rely on it.
*
* We'd like to have a proper introspective interface that
* explicitly describes the reason for whatever unwinding
* operations are currently in progress, so that those modules
* work reliably and $@ isn't further overloaded. But we don't
* have one yet. In its absence, as a stopgap measure, ERRSV is
* now *additionally* set here, before unwinding, to serve as the
* (unreliable) flag that it used to.
*
* This behaviour is temporary, and should be removed when a
* proper way to detect exceptional unwinding has been developed.
* As of 2010-12, the authors of modules relying on the hack
* are aware of the issue, because the modules failed on
* perls 5.13.{1..7} which had late setting of $@ without this
* early-setting hack.
*/
if (!(in_eval & EVAL_KEEPERR)) {
SvTEMP_off(exceptsv);
sv_setsv(ERRSV, exceptsv);
}
if (in_eval & EVAL_KEEPERR) {
Perl_ck_warner(aTHX_ packWARN(WARN_MISC), "\t(in cleanup) %"SVf,
SVfARG(exceptsv));
}
while ((cxix = dopoptoeval(cxstack_ix)) < 0
&& PL_curstackinfo->si_prev)
{
dounwind(-1);
POPSTACK;
}
if (cxix >= 0) {
I32 optype;
SV *namesv;
PERL_CONTEXT *cx;
SV **newsp;
#ifdef DEBUGGING
COP *oldcop;
#endif
JMPENV *restartjmpenv;
OP *restartop;
if (cxix < cxstack_ix)
dounwind(cxix);
POPBLOCK(cx,PL_curpm);
if (CxTYPE(cx) != CXt_EVAL) {
STRLEN msglen;
const char* message = SvPVx_const(exceptsv, msglen);
PerlIO_write(Perl_error_log, (const char *)"panic: die ", 11);
PerlIO_write(Perl_error_log, message, msglen);
my_exit(1);
}
POPEVAL(cx);
namesv = cx->blk_eval.old_namesv;
#ifdef DEBUGGING
oldcop = cx->blk_oldcop;
#endif
restartjmpenv = cx->blk_eval.cur_top_env;
restartop = cx->blk_eval.retop;
if (gimme == G_SCALAR)
*++newsp = &PL_sv_undef;
PL_stack_sp = newsp;
LEAVE;
if (optype == OP_REQUIRE) {
assert (PL_curcop == oldcop);
(void)hv_store(GvHVn(PL_incgv),
SvPVX_const(namesv),
SvUTF8(namesv) ? -(I32)SvCUR(namesv) : (I32)SvCUR(namesv),
&PL_sv_undef, 0);
/* note that unlike pp_entereval, pp_require isn't
* supposed to trap errors. So now that we've popped the
* EVAL that pp_require pushed, and processed the error
* message, rethrow the error */
Perl_croak(aTHX_ "%"SVf"Compilation failed in require",
SVfARG(exceptsv ? exceptsv : newSVpvs_flags("Unknown error\n",
SVs_TEMP)));
}
if (!(in_eval & EVAL_KEEPERR))
sv_setsv(ERRSV, exceptsv);
PL_restartjmpenv = restartjmpenv;
PL_restartop = restartop;
JMPENV_JUMP(3);
NOT_REACHED; /* NOTREACHED */
}
}
write_to_stderr(exceptsv);
my_failure_exit();
NOT_REACHED; /* NOTREACHED */
}
PP(pp_xor)
{
dSP; dPOPTOPssrl;
if (SvTRUE(left) != SvTRUE(right))
RETSETYES;
else
RETSETNO;
}
/*
=head1 CV Manipulation Functions
=for apidoc caller_cx
The XSUB-writer's equivalent of L<caller()|perlfunc/caller>. The
returned C<PERL_CONTEXT> structure can be interrogated to find all the
information returned to Perl by C<caller>. Note that XSUBs don't get a
stack frame, so C<caller_cx(0, NULL)> will return information for the
immediately-surrounding Perl code.
This function skips over the automatic calls to C<&DB::sub> made on the
behalf of the debugger. If the stack frame requested was a sub called by
C<DB::sub>, the return value will be the frame for the call to
C<DB::sub>, since that has the correct line number/etc. for the call
site. If I<dbcxp> is non-C<NULL>, it will be set to a pointer to the
frame for the sub call itself.
=cut
*/
const PERL_CONTEXT *
Perl_caller_cx(pTHX_ I32 count, const PERL_CONTEXT **dbcxp)
{
I32 cxix = dopoptosub(cxstack_ix);
const PERL_CONTEXT *cx;
const PERL_CONTEXT *ccstack = cxstack;
const PERL_SI *top_si = PL_curstackinfo;
for (;;) {
/* we may be in a higher stacklevel, so dig down deeper */
while (cxix < 0 && top_si->si_type != PERLSI_MAIN) {
top_si = top_si->si_prev;
ccstack = top_si->si_cxstack;
cxix = dopoptosub_at(ccstack, top_si->si_cxix);
}
if (cxix < 0)
return NULL;
/* caller() should not report the automatic calls to &DB::sub */
if (PL_DBsub && GvCV(PL_DBsub) && cxix >= 0 &&
ccstack[cxix].blk_sub.cv == GvCV(PL_DBsub))
count++;
if (!count--)
break;
cxix = dopoptosub_at(ccstack, cxix - 1);
}
cx = &ccstack[cxix];
if (dbcxp) *dbcxp = cx;
if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
const I32 dbcxix = dopoptosub_at(ccstack, cxix - 1);
/* We expect that ccstack[dbcxix] is CXt_SUB, anyway, the
field below is defined for any cx. */
/* caller() should not report the automatic calls to &DB::sub */
if (PL_DBsub && GvCV(PL_DBsub) && dbcxix >= 0 && ccstack[dbcxix].blk_sub.cv == GvCV(PL_DBsub))
cx = &ccstack[dbcxix];
}
return cx;
}
PP(pp_caller)
{
dSP;
const PERL_CONTEXT *cx;
const PERL_CONTEXT *dbcx;
I32 gimme = GIMME_V;
const HEK *stash_hek;
I32 count = 0;
bool has_arg = MAXARG && TOPs;
const COP *lcop;
if (MAXARG) {
if (has_arg)
count = POPi;
else (void)POPs;
}
cx = caller_cx(count + !!(PL_op->op_private & OPpOFFBYONE), &dbcx);
if (!cx) {
if (gimme != G_ARRAY) {
EXTEND(SP, 1);
RETPUSHUNDEF;
}
RETURN;
}
DEBUG_CX("CALLER");
assert(CopSTASH(cx->blk_oldcop));
stash_hek = SvTYPE(CopSTASH(cx->blk_oldcop)) == SVt_PVHV
? HvNAME_HEK((HV*)CopSTASH(cx->blk_oldcop))
: NULL;
if (gimme != G_ARRAY) {
EXTEND(SP, 1);
if (!stash_hek)
PUSHs(&PL_sv_undef);
else {
dTARGET;
sv_sethek(TARG, stash_hek);
PUSHs(TARG);
}
RETURN;
}
EXTEND(SP, 11);
if (!stash_hek)
PUSHs(&PL_sv_undef);
else {
dTARGET;
sv_sethek(TARG, stash_hek);
PUSHTARG;
}
mPUSHs(newSVpv(OutCopFILE(cx->blk_oldcop), 0));
lcop = closest_cop(cx->blk_oldcop, OpSIBLING(cx->blk_oldcop),
cx->blk_sub.retop, TRUE);
if (!lcop)
lcop = cx->blk_oldcop;
mPUSHi((I32)CopLINE(lcop));
if (!has_arg)
RETURN;
if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
/* So is ccstack[dbcxix]. */
if (CvHASGV(dbcx->blk_sub.cv)) {
PUSHs(cv_name(dbcx->blk_sub.cv, 0, 0));
PUSHs(boolSV(CxHASARGS(cx)));
}
else {
PUSHs(newSVpvs_flags("(unknown)", SVs_TEMP));
PUSHs(boolSV(CxHASARGS(cx)));
}
}
else {
PUSHs(newSVpvs_flags("(eval)", SVs_TEMP));
mPUSHi(0);
}
gimme = (I32)cx->blk_gimme;
if (gimme == G_VOID)
PUSHs(&PL_sv_undef);
else
PUSHs(boolSV((gimme & G_WANT) == G_ARRAY));
if (CxTYPE(cx) == CXt_EVAL) {
/* eval STRING */
if (CxOLD_OP_TYPE(cx) == OP_ENTEREVAL) {
SV *cur_text = cx->blk_eval.cur_text;
if (SvCUR(cur_text) >= 2) {
PUSHs(newSVpvn_flags(SvPVX(cur_text), SvCUR(cur_text)-2,
SvUTF8(cur_text)|SVs_TEMP));
}
else {
/* I think this is will always be "", but be sure */
PUSHs(sv_2mortal(newSVsv(cur_text)));
}
PUSHs(&PL_sv_no);
}
/* require */
else if (cx->blk_eval.old_namesv) {
mPUSHs(newSVsv(cx->blk_eval.old_namesv));
PUSHs(&PL_sv_yes);
}
/* eval BLOCK (try blocks have old_namesv == 0) */
else {
PUSHs(&PL_sv_undef);
PUSHs(&PL_sv_undef);
}
}
else {
PUSHs(&PL_sv_undef);
PUSHs(&PL_sv_undef);
}
if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)
&& CopSTASH_eq(PL_curcop, PL_debstash))
{
AV * const ary = cx->blk_sub.argarray;
const SSize_t off = AvARRAY(ary) - AvALLOC(ary);
Perl_init_dbargs(aTHX);
if (AvMAX(PL_dbargs) < AvFILLp(ary) + off)
av_extend(PL_dbargs, AvFILLp(ary) + off);
Copy(AvALLOC(ary), AvARRAY(PL_dbargs), AvFILLp(ary) + 1 + off, SV*);
AvFILLp(PL_dbargs) = AvFILLp(ary) + off;
}
mPUSHi(CopHINTS_get(cx->blk_oldcop));
{
SV * mask ;
STRLEN * const old_warnings = cx->blk_oldcop->cop_warnings ;
if (old_warnings == pWARN_NONE)
mask = newSVpvn(WARN_NONEstring, WARNsize) ;
else if (old_warnings == pWARN_STD && (PL_dowarn & G_WARN_ON) == 0)
mask = &PL_sv_undef ;
else if (old_warnings == pWARN_ALL ||
(old_warnings == pWARN_STD && PL_dowarn & G_WARN_ON)) {
/* Get the bit mask for $warnings::Bits{all}, because
* it could have been extended by warnings::register */
SV **bits_all;
HV * const bits = get_hv("warnings::Bits", 0);
if (bits && (bits_all=hv_fetchs(bits, "all", FALSE))) {
mask = newSVsv(*bits_all);
}
else {
mask = newSVpvn(WARN_ALLstring, WARNsize) ;
}
}
else
mask = newSVpvn((char *) (old_warnings + 1), old_warnings[0]);
mPUSHs(mask);
}
PUSHs(cx->blk_oldcop->cop_hints_hash ?
sv_2mortal(newRV_noinc(MUTABLE_SV(cop_hints_2hv(cx->blk_oldcop, 0))))
: &PL_sv_undef);
RETURN;
}
PP(pp_reset)
{
dSP;
const char * tmps;
STRLEN len = 0;
if (MAXARG < 1 || (!TOPs && !POPs))
tmps = NULL, len = 0;
else
tmps = SvPVx_const(POPs, len);
sv_resetpvn(tmps, len, CopSTASH(PL_curcop));
PUSHs(&PL_sv_yes);
RETURN;
}
/* like pp_nextstate, but used instead when the debugger is active */
PP(pp_dbstate)
{
PL_curcop = (COP*)PL_op;
TAINT_NOT; /* Each statement is presumed innocent */
PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
FREETMPS;
PERL_ASYNC_CHECK();
if (PL_op->op_flags & OPf_SPECIAL /* breakpoint */
|| PL_DBsingle_iv || PL_DBsignal_iv || PL_DBtrace_iv)
{
dSP;
PERL_CONTEXT *cx;
const I32 gimme = G_ARRAY;
U8 hasargs;
GV * const gv = PL_DBgv;
CV * cv = NULL;
if (gv && isGV_with_GP(gv))
cv = GvCV(gv);
if (!cv || (!CvROOT(cv) && !CvXSUB(cv)))
DIE(aTHX_ "No DB::DB routine defined");
if (CvDEPTH(cv) >= 1 && !(PL_debug & DEBUG_DB_RECURSE_FLAG))
/* don't do recursive DB::DB call */
return NORMAL;
ENTER;
SAVETMPS;
SAVEI32(PL_debug);
SAVESTACK_POS();
PL_debug = 0;
hasargs = 0;
SPAGAIN;
if (CvISXSUB(cv)) {
PUSHMARK(SP);
(void)(*CvXSUB(cv))(aTHX_ cv);
FREETMPS;
LEAVE;
return NORMAL;
}
else {
PUSHBLOCK(cx, CXt_SUB, SP);
PUSHSUB_DB(cx);
cx->blk_sub.retop = PL_op->op_next;
CvDEPTH(cv)++;
if (CvDEPTH(cv) >= 2) {
PERL_STACK_OVERFLOW_CHECK();
pad_push(CvPADLIST(cv), CvDEPTH(cv));
}
SAVECOMPPAD();
PAD_SET_CUR_NOSAVE(CvPADLIST(cv), CvDEPTH(cv));
RETURNOP(CvSTART(cv));
}
}
else
return NORMAL;
}
/* S_leave_common: Common code that many functions in this file use on
scope exit. */
/* SVs on the stack that have any of the flags passed in are left as is.
Other SVs are protected via the mortals stack if lvalue is true, and
copied otherwise.
Also, taintedness is cleared.
*/
STATIC SV **
S_leave_common(pTHX_ SV **newsp, SV **sp, SV **mark, I32 gimme,
U32 flags, bool lvalue)
{
bool padtmp = 0;
PERL_ARGS_ASSERT_LEAVE_COMMON;
TAINT_NOT;
if (flags & SVs_PADTMP) {
flags &= ~SVs_PADTMP;
padtmp = 1;
}
if (gimme == G_SCALAR) {
if (MARK < SP)
*++newsp = ((SvFLAGS(*SP) & flags) || (padtmp && SvPADTMP(*SP)))
? *SP
: lvalue
? sv_2mortal(SvREFCNT_inc_simple_NN(*SP))
: sv_mortalcopy(*SP);
else {
/* MEXTEND() only updates MARK, so reuse it instead of newsp. */
MARK = newsp;
MEXTEND(MARK, 1);
*++MARK = &PL_sv_undef;
return MARK;
}
}
else if (gimme == G_ARRAY) {
/* in case LEAVE wipes old return values */
while (++MARK <= SP) {
if ((SvFLAGS(*MARK) & flags) || (padtmp && SvPADTMP(*MARK)))
*++newsp = *MARK;
else {
*++newsp = lvalue
? sv_2mortal(SvREFCNT_inc_simple_NN(*MARK))
: sv_mortalcopy(*MARK);
TAINT_NOT; /* Each item is independent */
}
}
/* When this function was called with MARK == newsp, we reach this
* point with SP == newsp. */
}
return newsp;
}
PP(pp_enter)
{
dSP;
PERL_CONTEXT *cx;
I32 gimme = GIMME_V;
ENTER_with_name("block");
SAVETMPS;
PUSHBLOCK(cx, CXt_BLOCK, SP);
RETURN;
}
PP(pp_leave)
{
dSP;
PERL_CONTEXT *cx;
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, (cxstack_ix >= 0) ? gimme : G_SCALAR);
SP = leave_common(newsp, SP, newsp, gimme, SVs_PADTMP|SVs_TEMP,
PL_op->op_private & OPpLVALUE);
PL_curpm = newpm; /* Don't pop $1 et al till now */
LEAVE_with_name("block");
RETURN;
}
static bool
S_outside_integer(pTHX_ SV *sv)
{
if (SvOK(sv)) {
const NV nv = SvNV_nomg(sv);
if (Perl_isinfnan(nv))
return TRUE;
#ifdef NV_PRESERVES_UV
if (nv < (NV)IV_MIN || nv > (NV)IV_MAX)
return TRUE;
#else
if (nv <= (NV)IV_MIN)
return TRUE;
if ((nv > 0) &&
((nv > (NV)UV_MAX ||
SvUV_nomg(sv) > (UV)IV_MAX)))
return TRUE;
#endif
}
return FALSE;
}
PP(pp_enteriter)
{
dSP; dMARK;
PERL_CONTEXT *cx;
const I32 gimme = GIMME_V;
void *itervar; /* location of the iteration variable */
U8 cxtype = CXt_LOOP_FOR;
ENTER_with_name("loop1");
SAVETMPS;
if (PL_op->op_targ) { /* "my" variable */
if (PL_op->op_private & OPpLVAL_INTRO) { /* for my $x (...) */
SvPADSTALE_off(PAD_SVl(PL_op->op_targ));
SAVESETSVFLAGS(PAD_SVl(PL_op->op_targ),
SVs_PADSTALE, SVs_PADSTALE);
}
SAVEPADSVANDMORTALIZE(PL_op->op_targ);
#ifdef USE_ITHREADS
itervar = PL_comppad;
#else
itervar = &PAD_SVl(PL_op->op_targ);
#endif
}
else if (LIKELY(isGV(TOPs))) { /* symbol table variable */
GV * const gv = MUTABLE_GV(POPs);
SV** svp = &GvSV(gv);
save_pushptrptr(gv, SvREFCNT_inc(*svp), SAVEt_GVSV);
*svp = newSV(0);
itervar = (void *)gv;
save_aliased_sv(gv);
}
else {
SV * const sv = POPs;
assert(SvTYPE(sv) == SVt_PVMG);
assert(SvMAGIC(sv));
assert(SvMAGIC(sv)->mg_type == PERL_MAGIC_lvref);
itervar = (void *)sv;
cxtype |= CXp_FOR_LVREF;
}
if (PL_op->op_private & OPpITER_DEF)
cxtype |= CXp_FOR_DEF;
ENTER_with_name("loop2");
PUSHBLOCK(cx, cxtype, SP);
PUSHLOOP_FOR(cx, itervar, MARK);
if (PL_op->op_flags & OPf_STACKED) {
SV *maybe_ary = POPs;
if (SvTYPE(maybe_ary) != SVt_PVAV) {
dPOPss;
SV * const right = maybe_ary;
if (UNLIKELY(cxtype & CXp_FOR_LVREF))
DIE(aTHX_ "Assigned value is not a reference");
SvGETMAGIC(sv);
SvGETMAGIC(right);
if (RANGE_IS_NUMERIC(sv,right)) {
cx->cx_type &= ~CXTYPEMASK;
cx->cx_type |= CXt_LOOP_LAZYIV;
/* Make sure that no-one re-orders cop.h and breaks our
assumptions */
assert(CxTYPE(cx) == CXt_LOOP_LAZYIV);
if (S_outside_integer(aTHX_ sv) ||
S_outside_integer(aTHX_ right))
DIE(aTHX_ "Range iterator outside integer range");
cx->blk_loop.state_u.lazyiv.cur = SvIV_nomg(sv);
cx->blk_loop.state_u.lazyiv.end = SvIV_nomg(right);
#ifdef DEBUGGING
/* for correct -Dstv display */
cx->blk_oldsp = sp - PL_stack_base;
#endif
}
else {
cx->cx_type &= ~CXTYPEMASK;
cx->cx_type |= CXt_LOOP_LAZYSV;
/* Make sure that no-one re-orders cop.h and breaks our
assumptions */
assert(CxTYPE(cx) == CXt_LOOP_LAZYSV);
cx->blk_loop.state_u.lazysv.cur = newSVsv(sv);
cx->blk_loop.state_u.lazysv.end = right;
SvREFCNT_inc(right);
(void) SvPV_force_nolen(cx->blk_loop.state_u.lazysv.cur);
/* This will do the upgrade to SVt_PV, and warn if the value
is uninitialised. */
(void) SvPV_nolen_const(right);
/* Doing this avoids a check every time in pp_iter in pp_hot.c
to replace !SvOK() with a pointer to "". */
if (!SvOK(right)) {
SvREFCNT_dec(right);
cx->blk_loop.state_u.lazysv.end = &PL_sv_no;
}
}
}
else /* SvTYPE(maybe_ary) == SVt_PVAV */ {
cx->blk_loop.state_u.ary.ary = MUTABLE_AV(maybe_ary);
SvREFCNT_inc(maybe_ary);
cx->blk_loop.state_u.ary.ix =
(PL_op->op_private & OPpITER_REVERSED) ?
AvFILL(cx->blk_loop.state_u.ary.ary) + 1 :
-1;
}
}
else { /* iterating over items on the stack */
cx->blk_loop.state_u.ary.ary = NULL; /* means to use the stack */
if (PL_op->op_private & OPpITER_REVERSED) {
cx->blk_loop.state_u.ary.ix = cx->blk_oldsp + 1;
}
else {
cx->blk_loop.state_u.ary.ix = MARK - PL_stack_base;
}
}
RETURN;
}
PP(pp_enterloop)
{
dSP;
PERL_CONTEXT *cx;
const I32 gimme = GIMME_V;
ENTER_with_name("loop1");
SAVETMPS;
ENTER_with_name("loop2");
PUSHBLOCK(cx, CXt_LOOP_PLAIN, SP);
PUSHLOOP_PLAIN(cx, SP);
RETURN;
}
PP(pp_leaveloop)
{
dSP;
PERL_CONTEXT *cx;
I32 gimme;
SV **newsp;
PMOP *newpm;
SV **mark;
POPBLOCK(cx,newpm);
assert(CxTYPE_is_LOOP(cx));
mark = newsp;
newsp = PL_stack_base + cx->blk_loop.resetsp;
SP = leave_common(newsp, SP, MARK, gimme, 0,
PL_op->op_private & OPpLVALUE);
PUTBACK;
POPLOOP(cx); /* Stack values are safe: release loop vars ... */
PL_curpm = newpm; /* ... and pop $1 et al */
LEAVE_with_name("loop2");
LEAVE_with_name("loop1");
return NORMAL;
}
STATIC void
S_return_lvalues(pTHX_ SV **mark, SV **sp, SV **newsp, I32 gimme,
PERL_CONTEXT *cx, PMOP *newpm)
{
const bool ref = !!(CxLVAL(cx) & OPpENTERSUB_INARGS);
if (gimme == G_SCALAR) {
if (CxLVAL(cx) && !ref) { /* Leave it as it is if we can. */
SV *sv;
const char *what = NULL;
if (MARK < SP) {
assert(MARK+1 == SP);
if ((SvPADTMP(TOPs) || SvREADONLY(TOPs)) &&
!SvSMAGICAL(TOPs)) {
what =
SvREADONLY(TOPs) ? (TOPs == &PL_sv_undef) ? "undef"
: "a readonly value" : "a temporary";
}
else goto copy_sv;
}
else {
/* sub:lvalue{} will take us here. */
what = "undef";
}
LEAVE;
cxstack_ix--;
POPSUB(cx,sv);
PL_curpm = newpm;
LEAVESUB(sv);
Perl_croak(aTHX_
"Can't return %s from lvalue subroutine", what
);
}
if (MARK < SP) {
copy_sv:
if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
if (!SvPADTMP(*SP)) {
*++newsp = SvREFCNT_inc(*SP);
FREETMPS;
sv_2mortal(*newsp);
}
else {
/* FREETMPS could clobber it */
SV *sv = SvREFCNT_inc(*SP);
FREETMPS;
*++newsp = sv_mortalcopy(sv);
SvREFCNT_dec(sv);
}
}
else
*++newsp =
SvPADTMP(*SP)
? sv_mortalcopy(*SP)
: !SvTEMP(*SP)
? sv_2mortal(SvREFCNT_inc_simple_NN(*SP))
: *SP;
}
else {
EXTEND(newsp,1);
*++newsp = &PL_sv_undef;
}
if (CxLVAL(cx) & OPpDEREF) {
SvGETMAGIC(TOPs);
if (!SvOK(TOPs)) {
TOPs = vivify_ref(TOPs, CxLVAL(cx) & OPpDEREF);
}
}
}
else if (gimme == G_ARRAY) {
assert (!(CxLVAL(cx) & OPpDEREF));
if (ref || !CxLVAL(cx))
while (++MARK <= SP)
*++newsp =
SvFLAGS(*MARK) & SVs_PADTMP
? sv_mortalcopy(*MARK)
: SvTEMP(*MARK)
? *MARK
: sv_2mortal(SvREFCNT_inc_simple_NN(*MARK));
else while (++MARK <= SP) {
if (*MARK != &PL_sv_undef
&& (SvPADTMP(*MARK) || SvREADONLY(*MARK))
) {
const bool ro = cBOOL( SvREADONLY(*MARK) );
SV *sv;
/* Might be flattened array after $#array = */
PUTBACK;
LEAVE;
cxstack_ix--;
POPSUB(cx,sv);
PL_curpm = newpm;
LEAVESUB(sv);
/* diag_listed_as: Can't return %s from lvalue subroutine */
Perl_croak(aTHX_
"Can't return a %s from lvalue subroutine",
ro ? "readonly value" : "temporary");
}
else
*++newsp =
SvTEMP(*MARK)
? *MARK
: sv_2mortal(SvREFCNT_inc_simple_NN(*MARK));
}
}
PL_stack_sp = newsp;
}
PP(pp_return)
{
dSP; dMARK;
PERL_CONTEXT *cx;
bool popsub2 = FALSE;
bool clear_errsv = FALSE;
bool lval = FALSE;
I32 gimme;
SV **newsp;
PMOP *newpm;
I32 optype = 0;
SV *namesv;
SV *sv;
OP *retop = NULL;
const I32 cxix = dopoptosub(cxstack_ix);
if (cxix < 0) {
if (CxMULTICALL(cxstack)) { /* In this case we must be in a
* sort block, which is a CXt_NULL
* not a CXt_SUB */
dounwind(0);
PL_stack_base[1] = *PL_stack_sp;
PL_stack_sp = PL_stack_base + 1;
return 0;
}
else
DIE(aTHX_ "Can't return outside a subroutine");
}
if (cxix < cxstack_ix)
dounwind(cxix);
if (CxMULTICALL(&cxstack[cxix])) {
gimme = cxstack[cxix].blk_gimme;
if (gimme == G_VOID)
PL_stack_sp = PL_stack_base;
else if (gimme == G_SCALAR) {
PL_stack_base[1] = *PL_stack_sp;
PL_stack_sp = PL_stack_base + 1;
}
return 0;
}
POPBLOCK(cx,newpm);
switch (CxTYPE(cx)) {
case CXt_SUB:
popsub2 = TRUE;
lval = !!CvLVALUE(cx->blk_sub.cv);
retop = cx->blk_sub.retop;
cxstack_ix++; /* preserve cx entry on stack for use by POPSUB */
break;
case CXt_EVAL:
if (!(PL_in_eval & EVAL_KEEPERR))
clear_errsv = TRUE;
POPEVAL(cx);
namesv = cx->blk_eval.old_namesv;
retop = cx->blk_eval.retop;
if (CxTRYBLOCK(cx))
break;
if (optype == OP_REQUIRE &&
(MARK == SP || (gimme == G_SCALAR && !SvTRUE(*SP))) )
{
/* Unassume the success we assumed earlier. */
(void)hv_delete(GvHVn(PL_incgv),
SvPVX_const(namesv),
SvUTF8(namesv) ? -(I32)SvCUR(namesv) : (I32)SvCUR(namesv),
G_DISCARD);
DIE(aTHX_ "%"SVf" did not return a true value", SVfARG(namesv));
}
break;
case CXt_FORMAT:
retop = cx->blk_sub.retop;
POPFORMAT(cx);
break;
default:
DIE(aTHX_ "panic: return, type=%u", (unsigned) CxTYPE(cx));
}
TAINT_NOT;
if (lval) S_return_lvalues(aTHX_ MARK, SP, newsp, gimme, cx, newpm);
else {
if (gimme == G_SCALAR) {
if (MARK < SP) {
if (popsub2) {
if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
if (SvTEMP(TOPs) && SvREFCNT(TOPs) == 1
&& !SvMAGICAL(TOPs)) {
*++newsp = SvREFCNT_inc(*SP);
FREETMPS;
sv_2mortal(*newsp);
}
else {
sv = SvREFCNT_inc(*SP); /* FREETMPS could clobber it */
FREETMPS;
*++newsp = sv_mortalcopy(sv);
SvREFCNT_dec(sv);
}
}
else if (SvTEMP(*SP) && SvREFCNT(*SP) == 1
&& !SvMAGICAL(*SP)) {
*++newsp = *SP;
}
else
*++newsp = sv_mortalcopy(*SP);
}
else
*++newsp = sv_mortalcopy(*SP);
}
else
*++newsp = &PL_sv_undef;
}
else if (gimme == G_ARRAY) {
while (++MARK <= SP) {
*++newsp = popsub2 && SvTEMP(*MARK) && SvREFCNT(*MARK) == 1
&& !SvGMAGICAL(*MARK)
? *MARK : sv_mortalcopy(*MARK);
TAINT_NOT; /* Each item is independent */
}
}
PL_stack_sp = newsp;
}
LEAVE;
/* Stack values are safe: */
if (popsub2) {
cxstack_ix--;
POPSUB(cx,sv); /* release CV and @_ ... */
}
else
sv = NULL;
PL_curpm = newpm; /* ... and pop $1 et al */
LEAVESUB(sv);
if (clear_errsv) {
CLEAR_ERRSV();
}
return retop;
}
/* This duplicates parts of pp_leavesub, so that it can share code with
* pp_return */
PP(pp_leavesublv)
{
dSP;
SV **newsp;
PMOP *newpm;
I32 gimme;
PERL_CONTEXT *cx;
SV *sv;
if (CxMULTICALL(&cxstack[cxstack_ix]))
return 0;
POPBLOCK(cx,newpm);
cxstack_ix++; /* temporarily protect top context */
TAINT_NOT;
S_return_lvalues(aTHX_ newsp, SP, newsp, gimme, cx, newpm);
LEAVE;
POPSUB(cx,sv); /* Stack values are safe: release CV and @_ ... */
cxstack_ix--;
PL_curpm = newpm; /* ... and pop $1 et al */
LEAVESUB(sv);
return cx->blk_sub.retop;
}
static I32
S_unwind_loop(pTHX_ const char * const opname)
{
I32 cxix;
if (PL_op->op_flags & OPf_SPECIAL) {
cxix = dopoptoloop(cxstack_ix);
if (cxix < 0)
/* diag_listed_as: Can't "last" outside a loop block */
Perl_croak(aTHX_ "Can't \"%s\" outside a loop block", opname);
}
else {
dSP;
STRLEN label_len;
const char * const label =
PL_op->op_flags & OPf_STACKED
? SvPV(TOPs,label_len)
: (label_len = strlen(cPVOP->op_pv), cPVOP->op_pv);
const U32 label_flags =
PL_op->op_flags & OPf_STACKED
? SvUTF8(POPs)
: (cPVOP->op_private & OPpPV_IS_UTF8) ? SVf_UTF8 : 0;
PUTBACK;
cxix = dopoptolabel(label, label_len, label_flags);
if (cxix < 0)
/* diag_listed_as: Label not found for "last %s" */
Perl_croak(aTHX_ "Label not found for \"%s %"SVf"\"",
opname,
SVfARG(PL_op->op_flags & OPf_STACKED
&& !SvGMAGICAL(TOPp1s)
? TOPp1s
: newSVpvn_flags(label,
label_len,
label_flags | SVs_TEMP)));
}
if (cxix < cxstack_ix)
dounwind(cxix);
return cxix;
}
PP(pp_last)
{
PERL_CONTEXT *cx;
I32 pop2 = 0;
I32 gimme;
I32 optype;
OP *nextop = NULL;
SV **newsp;
PMOP *newpm;
SV *sv = NULL;
S_unwind_loop(aTHX_ "last");
POPBLOCK(cx,newpm);
cxstack_ix++; /* temporarily protect top context */
switch (CxTYPE(cx)) {
case CXt_LOOP_LAZYIV:
case CXt_LOOP_LAZYSV:
case CXt_LOOP_FOR:
case CXt_LOOP_PLAIN:
pop2 = CxTYPE(cx);
newsp = PL_stack_base + cx->blk_loop.resetsp;
nextop = cx->blk_loop.my_op->op_lastop->op_next;
break;
case CXt_SUB:
pop2 = CXt_SUB;
nextop = cx->blk_sub.retop;
break;
case CXt_EVAL:
POPEVAL(cx);
nextop = cx->blk_eval.retop;
break;
case CXt_FORMAT:
POPFORMAT(cx);
nextop = cx->blk_sub.retop;
break;
default:
DIE(aTHX_ "panic: last, type=%u", (unsigned) CxTYPE(cx));
}
TAINT_NOT;
PL_stack_sp = newsp;
LEAVE;
cxstack_ix--;
/* Stack values are safe: */
switch (pop2) {
case CXt_LOOP_LAZYIV:
case CXt_LOOP_PLAIN:
case CXt_LOOP_LAZYSV:
case CXt_LOOP_FOR:
POPLOOP(cx); /* release loop vars ... */
LEAVE;
break;
case CXt_SUB:
POPSUB(cx,sv); /* release CV and @_ ... */
break;
}
PL_curpm = newpm; /* ... and pop $1 et al */
LEAVESUB(sv);
PERL_UNUSED_VAR(optype);
PERL_UNUSED_VAR(gimme);
return nextop;
}
PP(pp_next)
{
PERL_CONTEXT *cx;
const I32 inner = PL_scopestack_ix;
S_unwind_loop(aTHX_ "next");
/* clear off anything above the scope we're re-entering, but
* save the rest until after a possible continue block */
TOPBLOCK(cx);
if (PL_scopestack_ix < inner)
leave_scope(PL_scopestack[PL_scopestack_ix]);
PL_curcop = cx->blk_oldcop;
PERL_ASYNC_CHECK();
return (cx)->blk_loop.my_op->op_nextop;
}
PP(pp_redo)
{
const I32 cxix = S_unwind_loop(aTHX_ "redo");
PERL_CONTEXT *cx;
I32 oldsave;
OP* redo_op = cxstack[cxix].blk_loop.my_op->op_redoop;
if (redo_op->op_type == OP_ENTER) {
/* pop one less context to avoid $x being freed in while (my $x..) */
cxstack_ix++;
assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_BLOCK);
redo_op = redo_op->op_next;
}
TOPBLOCK(cx);
oldsave = PL_scopestack[PL_scopestack_ix - 1];
LEAVE_SCOPE(oldsave);
FREETMPS;
PL_curcop = cx->blk_oldcop;
PERL_ASYNC_CHECK();
return redo_op;
}
STATIC OP *
S_dofindlabel(pTHX_ OP *o, const char *label, STRLEN len, U32 flags, OP **opstack, OP **oplimit)
{
OP **ops = opstack;
static const char* const too_deep = "Target of goto is too deeply nested";
PERL_ARGS_ASSERT_DOFINDLABEL;
if (ops >= oplimit)
Perl_croak(aTHX_ "%s", too_deep);
if (o->op_type == OP_LEAVE ||
o->op_type == OP_SCOPE ||
o->op_type == OP_LEAVELOOP ||
o->op_type == OP_LEAVESUB ||
o->op_type == OP_LEAVETRY)
{
*ops++ = cUNOPo->op_first;
if (ops >= oplimit)
Perl_croak(aTHX_ "%s", too_deep);
}
*ops = 0;
if (o->op_flags & OPf_KIDS) {
OP *kid;
/* First try all the kids at this level, since that's likeliest. */
for (kid = cUNOPo->op_first; kid; kid = OpSIBLING(kid)) {
if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
STRLEN kid_label_len;
U32 kid_label_flags;
const char *kid_label = CopLABEL_len_flags(kCOP,
&kid_label_len, &kid_label_flags);
if (kid_label && (
( (kid_label_flags & SVf_UTF8) != (flags & SVf_UTF8) ) ?
(flags & SVf_UTF8)
? (bytes_cmp_utf8(
(const U8*)kid_label, kid_label_len,
(const U8*)label, len) == 0)
: (bytes_cmp_utf8(
(const U8*)label, len,
(const U8*)kid_label, kid_label_len) == 0)
: ( len == kid_label_len && ((kid_label == label)
|| memEQ(kid_label, label, len)))))
return kid;
}
}
for (kid = cUNOPo->op_first; kid; kid = OpSIBLING(kid)) {
if (kid == PL_lastgotoprobe)
continue;
if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
if (ops == opstack)
*ops++ = kid;
else if (ops[-1]->op_type == OP_NEXTSTATE ||
ops[-1]->op_type == OP_DBSTATE)
ops[-1] = kid;
else
*ops++ = kid;
}
if ((o = dofindlabel(kid, label, len, flags, ops, oplimit)))
return o;
}
}
*ops = 0;
return 0;
}
/* also used for: pp_dump() */
PP(pp_goto)
{
dVAR; dSP;
OP *retop = NULL;
I32 ix;
PERL_CONTEXT *cx;
#define GOTO_DEPTH 64
OP *enterops[GOTO_DEPTH];
const char *label = NULL;
STRLEN label_len = 0;
U32 label_flags = 0;
const bool do_dump = (PL_op->op_type == OP_DUMP);
static const char* const must_have_label = "goto must have label";
if (PL_op->op_flags & OPf_STACKED) {
/* goto EXPR or goto &foo */
SV * const sv = POPs;
SvGETMAGIC(sv);
/* This egregious kludge implements goto &subroutine */
if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVCV) {
I32 cxix;
PERL_CONTEXT *cx;
CV *cv = MUTABLE_CV(SvRV(sv));
AV *arg = GvAV(PL_defgv);
I32 oldsave;
retry:
if (!CvROOT(cv) && !CvXSUB(cv)) {
const GV * const gv = CvGV(cv);
if (gv) {
GV *autogv;
SV *tmpstr;
/* autoloaded stub? */
if (cv != GvCV(gv) && (cv = GvCV(gv)))
goto retry;
autogv = gv_autoload_pvn(GvSTASH(gv), GvNAME(gv),
GvNAMELEN(gv),
GvNAMEUTF8(gv) ? SVf_UTF8 : 0);
if (autogv && (cv = GvCV(autogv)))
goto retry;
tmpstr = sv_newmortal();
gv_efullname3(tmpstr, gv, NULL);
DIE(aTHX_ "Goto undefined subroutine &%"SVf"", SVfARG(tmpstr));
}
DIE(aTHX_ "Goto undefined subroutine");
}
/* First do some returnish stuff. */
SvREFCNT_inc_simple_void(cv); /* avoid premature free during unwind */
FREETMPS;
cxix = dopoptosub(cxstack_ix);
if (cxix < cxstack_ix) {
if (cxix < 0) {
SvREFCNT_dec(cv);
DIE(aTHX_ "Can't goto subroutine outside a subroutine");
}
dounwind(cxix);
}
TOPBLOCK(cx);
SPAGAIN;
/* ban goto in eval: see <20050521150056.GC20213@iabyn.com> */
if (CxTYPE(cx) == CXt_EVAL) {
SvREFCNT_dec(cv);
if (CxREALEVAL(cx))
/* diag_listed_as: Can't goto subroutine from an eval-%s */
DIE(aTHX_ "Can't goto subroutine from an eval-string");
else
/* diag_listed_as: Can't goto subroutine from an eval-%s */
DIE(aTHX_ "Can't goto subroutine from an eval-block");
}
else if (CxMULTICALL(cx))
{
SvREFCNT_dec(cv);
DIE(aTHX_ "Can't goto subroutine from a sort sub (or similar callback)");
}
if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)) {
AV* av = cx->blk_sub.argarray;
/* abandon the original @_ if it got reified or if it is
the same as the current @_ */
if (AvREAL(av) || av == arg) {
SvREFCNT_dec(av);
av = newAV();
AvREIFY_only(av);
PAD_SVl(0) = MUTABLE_SV(cx->blk_sub.argarray = av);
}
else CLEAR_ARGARRAY(av);
}
/* We donate this refcount later to the callee’s pad. */
SvREFCNT_inc_simple_void(arg);
if (CxTYPE(cx) == CXt_SUB &&
!(CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth))
SvREFCNT_dec(cx->blk_sub.cv);
oldsave = PL_scopestack[PL_scopestack_ix - 1];
LEAVE_SCOPE(oldsave);
/* A destructor called during LEAVE_SCOPE could have undefined
* our precious cv. See bug #99850. */
if (!CvROOT(cv) && !CvXSUB(cv)) {
const GV * const gv = CvGV(cv);
SvREFCNT_dec(arg);
if (gv) {
SV * const tmpstr = sv_newmortal();
gv_efullname3(tmpstr, gv, NULL);
DIE(aTHX_ "Goto undefined subroutine &%"SVf"",
SVfARG(tmpstr));
}
DIE(aTHX_ "Goto undefined subroutine");
}
/* Now do some callish stuff. */
SAVETMPS;
SAVEFREESV(cv); /* later, undo the 'avoid premature free' hack */
if (CvISXSUB(cv)) {
SV **newsp;
I32 gimme;
const SSize_t items = arg ? AvFILL(arg) + 1 : 0;
const bool m = arg ? cBOOL(SvRMAGICAL(arg)) : 0;
SV** mark;
PERL_UNUSED_VAR(newsp);
PERL_UNUSED_VAR(gimme);
/* put GvAV(defgv) back onto stack */
if (items) {
EXTEND(SP, items+1); /* @_ could have been extended. */
}
mark = SP;
if (items) {
SSize_t index;
bool r = cBOOL(AvREAL(arg));
for (index=0; index<items; index++)
{
SV *sv;
if (m) {
SV ** const svp = av_fetch(arg, index, 0);
sv = svp ? *svp : NULL;
}
else sv = AvARRAY(arg)[index];
SP[index+1] = sv
? r ? SvREFCNT_inc_NN(sv_2mortal(sv)) : sv
: sv_2mortal(newSVavdefelem(arg, index, 1));
}
}
SP += items;
SvREFCNT_dec(arg);
if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)) {
/* Restore old @_ */
arg = GvAV(PL_defgv);
GvAV(PL_defgv) = cx->blk_sub.savearray;
SvREFCNT_dec(arg);
}
retop = cx->blk_sub.retop;
/* XS subs don't have a CxSUB, so pop it */
POPBLOCK(cx, PL_curpm);
/* Push a mark for the start of arglist */
PUSHMARK(mark);
PUTBACK;
(void)(*CvXSUB(cv))(aTHX_ cv);
LEAVE;
goto _return;
}
else {
PADLIST * const padlist = CvPADLIST(cv);
cx->blk_sub.cv = cv;
cx->blk_sub.olddepth = CvDEPTH(cv);
CvDEPTH(cv)++;
if (CvDEPTH(cv) < 2)
SvREFCNT_inc_simple_void_NN(cv);
else {
if (CvDEPTH(cv) == PERL_SUB_DEPTH_WARN && ckWARN(WARN_RECURSION))
sub_crush_depth(cv);
pad_push(padlist, CvDEPTH(cv));
}
PL_curcop = cx->blk_oldcop;
SAVECOMPPAD();
PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv));
if (CxHASARGS(cx))
{
CX_CURPAD_SAVE(cx->blk_sub);
/* cx->blk_sub.argarray has no reference count, so we
need something to hang on to our argument array so
that cx->blk_sub.argarray does not end up pointing
to freed memory as the result of undef *_. So put
it in the callee’s pad, donating our refer-
ence count. */
if (arg) {
SvREFCNT_dec(PAD_SVl(0));
PAD_SVl(0) = (SV *)(cx->blk_sub.argarray = arg);
}
/* GvAV(PL_defgv) might have been modified on scope
exit, so restore it. */
if (arg != GvAV(PL_defgv)) {
AV * const av = GvAV(PL_defgv);
GvAV(PL_defgv) = (AV *)SvREFCNT_inc_simple(arg);
SvREFCNT_dec(av);
}
}
else SvREFCNT_dec(arg);
if (PERLDB_SUB) { /* Checking curstash breaks DProf. */
Perl_get_db_sub(aTHX_ NULL, cv);
if (PERLDB_GOTO) {
CV * const gotocv = get_cvs("DB::goto", 0);
if (gotocv) {
PUSHMARK( PL_stack_sp );
call_sv(MUTABLE_SV(gotocv), G_SCALAR | G_NODEBUG);
PL_stack_sp--;
}
}
}
retop = CvSTART(cv);
goto putback_return;
}
}
else {
/* goto EXPR */
label = SvPV_nomg_const(sv, label_len);
label_flags = SvUTF8(sv);
}
}
else if (!(PL_op->op_flags & OPf_SPECIAL)) {
/* goto LABEL or dump LABEL */
label = cPVOP->op_pv;
label_flags = (cPVOP->op_private & OPpPV_IS_UTF8) ? SVf_UTF8 : 0;
label_len = strlen(label);
}
if (!(do_dump || label_len)) DIE(aTHX_ "%s", must_have_label);
PERL_ASYNC_CHECK();
if (label_len) {
OP *gotoprobe = NULL;
bool leaving_eval = FALSE;
bool in_block = FALSE;
PERL_CONTEXT *last_eval_cx = NULL;
/* find label */
PL_lastgotoprobe = NULL;
*enterops = 0;
for (ix = cxstack_ix; ix >= 0; ix--) {
cx = &cxstack[ix];
switch (CxTYPE(cx)) {
case CXt_EVAL:
leaving_eval = TRUE;
if (!CxTRYBLOCK(cx)) {
gotoprobe = (last_eval_cx ?
last_eval_cx->blk_eval.old_eval_root :
PL_eval_root);
last_eval_cx = cx;
break;
}
/* else fall through */
case CXt_LOOP_LAZYIV:
case CXt_LOOP_LAZYSV:
case CXt_LOOP_FOR:
case CXt_LOOP_PLAIN:
case CXt_GIVEN:
case CXt_WHEN:
gotoprobe = OpSIBLING(cx->blk_oldcop);
break;
case CXt_SUBST:
continue;
case CXt_BLOCK:
if (ix) {
gotoprobe = OpSIBLING(cx->blk_oldcop);
in_block = TRUE;
} else
gotoprobe = PL_main_root;
break;
case CXt_SUB:
if (CvDEPTH(cx->blk_sub.cv) && !CxMULTICALL(cx)) {
gotoprobe = CvROOT(cx->blk_sub.cv);
break;
}
/* FALLTHROUGH */
case CXt_FORMAT:
case CXt_NULL:
DIE(aTHX_ "Can't \"goto\" out of a pseudo block");
default:
if (ix)
DIE(aTHX_ "panic: goto, type=%u, ix=%ld",
CxTYPE(cx), (long) ix);
gotoprobe = PL_main_root;
break;
}
if (gotoprobe) {
OP *sibl1, *sibl2;
retop = dofindlabel(gotoprobe, label, label_len, label_flags,
enterops, enterops + GOTO_DEPTH);
if (retop)
break;
if ( (sibl1 = OpSIBLING(gotoprobe)) &&
sibl1->op_type == OP_UNSTACK &&
(sibl2 = OpSIBLING(sibl1)))
{
retop = dofindlabel(sibl2,
label, label_len, label_flags, enterops,
enterops + GOTO_DEPTH);
if (retop)
break;
}
}
PL_lastgotoprobe = gotoprobe;
}
if (!retop)
DIE(aTHX_ "Can't find label %"UTF8f,
UTF8fARG(label_flags, label_len, label));
/* if we're leaving an eval, check before we pop any frames
that we're not going to punt, otherwise the error
won't be caught */
if (leaving_eval && *enterops && enterops[1]) {
I32 i;
for (i = 1; enterops[i]; i++)
if (enterops[i]->op_type == OP_ENTERITER)
DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
}
if (*enterops && enterops[1]) {
I32 i = enterops[1]->op_type == OP_ENTER && in_block ? 2 : 1;
if (enterops[i])
deprecate("\"goto\" to jump into a construct");
}
/* pop unwanted frames */
if (ix < cxstack_ix) {
I32 oldsave;
if (ix < 0)
DIE(aTHX_ "panic: docatch: illegal ix=%ld", (long)ix);
dounwind(ix);
TOPBLOCK(cx);
oldsave = PL_scopestack[PL_scopestack_ix];
LEAVE_SCOPE(oldsave);
}
/* push wanted frames */
if (*enterops && enterops[1]) {
OP * const oldop = PL_op;
ix = enterops[1]->op_type == OP_ENTER && in_block ? 2 : 1;
for (; enterops[ix]; ix++) {
PL_op = enterops[ix];
/* Eventually we may want to stack the needed arguments
* for each op. For now, we punt on the hard ones. */
if (PL_op->op_type == OP_ENTERITER)
DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
PL_op->op_ppaddr(aTHX);
}
PL_op = oldop;
}
}
else {
assert(do_dump);
#ifdef VMS
if (!retop) retop = PL_main_start;
#endif
PL_restartop = retop;
PL_do_undump = TRUE;
my_unexec();
PL_restartop = 0; /* hmm, must be GNU unexec().. */
PL_do_undump = FALSE;
}
putback_return:
PL_stack_sp = sp;
_return:
PERL_ASYNC_CHECK();
return retop;
}
PP(pp_exit)
{
dSP;
I32 anum;
if (MAXARG < 1)
anum = 0;
else if (!TOPs) {
anum = 0; (void)POPs;
}
else {
anum = SvIVx(POPs);
#ifdef VMS
if (anum == 1
&& SvTRUE(cop_hints_fetch_pvs(PL_curcop, "vmsish_exit", 0)))
anum = 0;
VMSISH_HUSHED =
VMSISH_HUSHED || (PL_curcop->op_private & OPpHUSH_VMSISH);
#endif
}
PL_exit_flags |= PERL_EXIT_EXPECTED;
my_exit(anum);
PUSHs(&PL_sv_undef);
RETURN;
}
/* Eval. */
STATIC void
S_save_lines(pTHX_ AV *array, SV *sv)
{
const char *s = SvPVX_const(sv);
const char * const send = SvPVX_const(sv) + SvCUR(sv);
I32 line = 1;
PERL_ARGS_ASSERT_SAVE_LINES;
while (s && s < send) {
const char *t;
SV * const tmpstr = newSV_type(SVt_PVMG);
t = (const char *)memchr(s, '\n', send - s);
if (t)
t++;
else
t = send;
sv_setpvn(tmpstr, s, t - s);
av_store(array, line++, tmpstr);
s = t;
}
}
/*
=for apidoc docatch
Check for the cases 0 or 3 of cur_env.je_ret, only used inside an eval context.
0 is used as continue inside eval,
3 is used for a die caught by an inner eval - continue inner loop
See cop.h: je_mustcatch, when set at any runlevel to TRUE, means eval ops must
establish a local jmpenv to handle exception traps.
=cut
*/
STATIC OP *
S_docatch(pTHX_ OP *o)
{
int ret;
OP * const oldop = PL_op;
dJMPENV;
#ifdef DEBUGGING
assert(CATCH_GET == TRUE);
#endif
PL_op = o;
JMPENV_PUSH(ret);
switch (ret) {
case 0:
assert(cxstack_ix >= 0);
assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
cxstack[cxstack_ix].blk_eval.cur_top_env = PL_top_env;
redo_body:
CALLRUNOPS(aTHX);
break;
case 3:
/* die caught by an inner eval - continue inner loop */
if (PL_restartop && PL_restartjmpenv == PL_top_env) {
PL_restartjmpenv = NULL;
PL_op = PL_restartop;
PL_restartop = 0;
goto redo_body;
}
/* FALLTHROUGH */
default:
JMPENV_POP;
PL_op = oldop;
JMPENV_JUMP(ret);
NOT_REACHED; /* NOTREACHED */
}
JMPENV_POP;
PL_op = oldop;
return NULL;
}
/*
=for apidoc find_runcv
Locate the CV corresponding to the currently executing sub or eval.
If db_seqp is non_null, skip CVs that are in the DB package and populate
*db_seqp with the cop sequence number at the point that the DB:: code was
entered. (This allows debuggers to eval in the scope of the breakpoint
rather than in the scope of the debugger itself.)
=cut
*/
CV*
Perl_find_runcv(pTHX_ U32 *db_seqp)
{
return Perl_find_runcv_where(aTHX_ 0, 0, db_seqp);
}
/* If this becomes part of the API, it might need a better name. */
CV *
Perl_find_runcv_where(pTHX_ U8 cond, IV arg, U32 *db_seqp)
{
PERL_SI *si;
int level = 0;
if (db_seqp)
*db_seqp =
PL_curcop == &PL_compiling
? PL_cop_seqmax
: PL_curcop->cop_seq;
for (si = PL_curstackinfo; si; si = si->si_prev) {
I32 ix;
for (ix = si->si_cxix; ix >= 0; ix--) {
const PERL_CONTEXT *cx = &(si->si_cxstack[ix]);
CV *cv = NULL;
if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
cv = cx->blk_sub.cv;
/* skip DB:: code */
if (db_seqp && PL_debstash && CvSTASH(cv) == PL_debstash) {
*db_seqp = cx->blk_oldcop->cop_seq;
continue;
}
if (cx->cx_type & CXp_SUB_RE)
continue;
}
else if (CxTYPE(cx) == CXt_EVAL && !CxTRYBLOCK(cx))
cv = cx->blk_eval.cv;
if (cv) {
switch (cond) {
case FIND_RUNCV_padid_eq:
if (!CvPADLIST(cv)
|| CvPADLIST(cv)->xpadl_id != (U32)arg)
continue;
return cv;
case FIND_RUNCV_level_eq:
if (level++ != arg) continue;
/* GERONIMO! */
default:
return cv;
}
}
}
}
return cond == FIND_RUNCV_padid_eq ? NULL : PL_main_cv;
}
/* Run yyparse() in a setjmp wrapper. Returns:
* 0: yyparse() successful
* 1: yyparse() failed
* 3: yyparse() died
*/
STATIC int
S_try_yyparse(pTHX_ int gramtype)
{
int ret;
dJMPENV;
assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
JMPENV_PUSH(ret);
switch (ret) {
case 0:
ret = yyparse(gramtype) ? 1 : 0;
break;
case 3:
break;
default:
JMPENV_POP;
JMPENV_JUMP(ret);
NOT_REACHED; /* NOTREACHED */
}
JMPENV_POP;
return ret;
}
/* Compile a require/do or an eval ''.
*
* outside is the lexically enclosing CV (if any) that invoked us.
* seq is the current COP scope value.
* hh is the saved hints hash, if any.
*
* Returns a bool indicating whether the compile was successful; if so,
* PL_eval_start contains the first op of the compiled code; otherwise,
* pushes undef.
*
* This function is called from two places: pp_require and pp_entereval.
* These can be distinguished by whether PL_op is entereval.
*/
STATIC bool
S_doeval(pTHX_ int gimme, CV* outside, U32 seq, HV *hh)
{
dSP;
OP * const saveop = PL_op;
bool clear_hints = saveop->op_type != OP_ENTEREVAL;
COP * const oldcurcop = PL_curcop;
bool in_require = (saveop->op_type == OP_REQUIRE);
int yystatus;
CV *evalcv;
PL_in_eval = (in_require
? (EVAL_INREQUIRE | (PL_in_eval & EVAL_INEVAL))
: (EVAL_INEVAL |
((PL_op->op_private & OPpEVAL_RE_REPARSING)
? EVAL_RE_REPARSING : 0)));
PUSHMARK(SP);
evalcv = MUTABLE_CV(newSV_type(SVt_PVCV));
CvEVAL_on(evalcv);
assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
cxstack[cxstack_ix].blk_eval.cv = evalcv;
cxstack[cxstack_ix].blk_gimme = gimme;
CvOUTSIDE_SEQ(evalcv) = seq;
CvOUTSIDE(evalcv) = MUTABLE_CV(SvREFCNT_inc_simple(outside));
/* set up a scratch pad */
CvPADLIST_set(evalcv, pad_new(padnew_SAVE));
PL_op = NULL; /* avoid PL_op and PL_curpad referring to different CVs */
SAVEMORTALIZESV(evalcv); /* must remain until end of current statement */
/* make sure we compile in the right package */
if (CopSTASH_ne(PL_curcop, PL_curstash)) {
SAVEGENERICSV(PL_curstash);
PL_curstash = (HV *)CopSTASH(PL_curcop);
if (SvTYPE(PL_curstash) != SVt_PVHV) PL_curstash = NULL;
else SvREFCNT_inc_simple_void(PL_curstash);
}
/* XXX:ajgo do we really need to alloc an AV for begin/checkunit */
SAVESPTR(PL_beginav);
PL_beginav = newAV();
SAVEFREESV(PL_beginav);
SAVESPTR(PL_unitcheckav);
PL_unitcheckav = newAV();
SAVEFREESV(PL_unitcheckav);
ENTER_with_name("evalcomp");
SAVESPTR(PL_compcv);
PL_compcv = evalcv;
/* try to compile it */
PL_eval_root = NULL;
PL_curcop = &PL_compiling;
if ((saveop->op_type != OP_REQUIRE) && (saveop->op_flags & OPf_SPECIAL))
PL_in_eval |= EVAL_KEEPERR;
else
CLEAR_ERRSV();
SAVEHINTS();
if (clear_hints) {
PL_hints = 0;
hv_clear(GvHV(PL_hintgv));
}
else {
PL_hints = saveop->op_private & OPpEVAL_COPHH
? oldcurcop->cop_hints : saveop->op_targ;
/* making 'use re eval' not be in scope when compiling the
* qr/mabye_has_runtime_code_block/ ensures that we don't get
* infinite recursion when S_has_runtime_code() gives a false
* positive: the second time round, HINT_RE_EVAL isn't set so we
* don't bother calling S_has_runtime_code() */
if (PL_in_eval & EVAL_RE_REPARSING)
PL_hints &= ~HINT_RE_EVAL;
if (hh) {
/* SAVEHINTS created a new HV in PL_hintgv, which we need to GC */
SvREFCNT_dec(GvHV(PL_hintgv));
GvHV(PL_hintgv) = hh;
}
}
SAVECOMPILEWARNINGS();
if (clear_hints) {
if (PL_dowarn & G_WARN_ALL_ON)
PL_compiling.cop_warnings = pWARN_ALL ;
else if (PL_dowarn & G_WARN_ALL_OFF)
PL_compiling.cop_warnings = pWARN_NONE ;
else
PL_compiling.cop_warnings = pWARN_STD ;
}
else {
PL_compiling.cop_warnings =
DUP_WARNINGS(oldcurcop->cop_warnings);
cophh_free(CopHINTHASH_get(&PL_compiling));
if (Perl_cop_fetch_label(aTHX_ oldcurcop, NULL, NULL)) {
/* The label, if present, is the first entry on the chain. So rather
than writing a blank label in front of it (which involves an
allocation), just use the next entry in the chain. */
PL_compiling.cop_hints_hash
= cophh_copy(oldcurcop->cop_hints_hash->refcounted_he_next);
/* Check the assumption that this removed the label. */
assert(Perl_cop_fetch_label(aTHX_ &PL_compiling, NULL, NULL) == NULL);
}
else
PL_compiling.cop_hints_hash = cophh_copy(oldcurcop->cop_hints_hash);
}
CALL_BLOCK_HOOKS(bhk_eval, saveop);
/* note that yyparse() may raise an exception, e.g. C<BEGIN{die}>,
* so honour CATCH_GET and trap it here if necessary */
yystatus = (!in_require && CATCH_GET) ? S_try_yyparse(aTHX_ GRAMPROG) : yyparse(GRAMPROG);
if (yystatus || PL_parser->error_count || !PL_eval_root) {
SV **newsp; /* Used by POPBLOCK. */
PERL_CONTEXT *cx;
I32 optype; /* Used by POPEVAL. */
SV *namesv;
SV *errsv = NULL;
cx = NULL;
namesv = NULL;
PERL_UNUSED_VAR(newsp);
PERL_UNUSED_VAR(optype);
/* note that if yystatus == 3, then the EVAL CX block has already
* been popped, and various vars restored */
PL_op = saveop;
if (yystatus != 3) {
if (PL_eval_root) {
op_free(PL_eval_root);
PL_eval_root = NULL;
}
SP = PL_stack_base + POPMARK; /* pop original mark */
POPBLOCK(cx,PL_curpm);
POPEVAL(cx);
namesv = cx->blk_eval.old_namesv;
/* POPBLOCK renders LEAVE_with_name("evalcomp") unnecessary. */
LEAVE_with_name("eval"); /* pp_entereval knows about this LEAVE. */
}
errsv = ERRSV;
if (in_require) {
if (!cx) {
/* If cx is still NULL, it means that we didn't go in the
* POPEVAL branch. */
cx = &cxstack[cxstack_ix];
assert(CxTYPE(cx) == CXt_EVAL);
namesv = cx->blk_eval.old_namesv;
}
(void)hv_store(GvHVn(PL_incgv),
SvPVX_const(namesv),
SvUTF8(namesv) ? -(I32)SvCUR(namesv) : (I32)SvCUR(namesv),
&PL_sv_undef, 0);
Perl_croak(aTHX_ "%"SVf"Compilation failed in require",
SVfARG(errsv
? errsv
: newSVpvs_flags("Unknown error\n", SVs_TEMP)));
}
else {
if (!*(SvPV_nolen_const(errsv))) {
sv_setpvs(errsv, "Compilation error");
}
}
if (gimme != G_ARRAY) PUSHs(&PL_sv_undef);
PUTBACK;
return FALSE;
}
else
LEAVE_with_name("evalcomp");
CopLINE_set(&PL_compiling, 0);
SAVEFREEOP(PL_eval_root);
cv_forget_slab(evalcv);
DEBUG_x(dump_eval());
/* Register with debugger: */
if (PERLDB_INTER && saveop->op_type == OP_REQUIRE) {
CV * const cv = get_cvs("DB::postponed", 0);
if (cv) {
dSP;
PUSHMARK(SP);
XPUSHs(MUTABLE_SV(CopFILEGV(&PL_compiling)));
PUTBACK;
call_sv(MUTABLE_SV(cv), G_DISCARD);
}
}
if (PL_unitcheckav) {
OP *es = PL_eval_start;
call_list(PL_scopestack_ix, PL_unitcheckav);
PL_eval_start = es;
}
/* compiled okay, so do it */
CvDEPTH(evalcv) = 1;
SP = PL_stack_base + POPMARK; /* pop original mark */
PL_op = saveop; /* The caller may need it. */
PL_parser->lex_state = LEX_NOTPARSING; /* $^S needs this. */
PUTBACK;
return TRUE;
}
STATIC PerlIO *
S_check_type_and_open(pTHX_ SV *name)
{
Stat_t st;
STRLEN len;
PerlIO * retio;
const char *p = SvPV_const(name, len);
int st_rc;
PERL_ARGS_ASSERT_CHECK_TYPE_AND_OPEN;
/* checking here captures a reasonable error message when
* PERL_DISABLE_PMC is true, but when PMC checks are enabled, the
* user gets a confusing message about looking for the .pmc file
* rather than for the .pm file.
* This check prevents a \0 in @INC causing problems.
*/
if (!IS_SAFE_PATHNAME(p, len, "require"))
return NULL;
/* on Win32 stat is expensive (it does an open() and close() twice and
a couple other IO calls), the open will fail with a dir on its own with
errno EACCES, so only do a stat to separate a dir from a real EACCES
caused by user perms */
#ifndef WIN32
/* we use the value of errno later to see how stat() or open() failed.
* We don't want it set if the stat succeeded but we still failed,
* such as if the name exists, but is a directory */
errno = 0;
st_rc = PerlLIO_stat(p, &st);
if (st_rc < 0 || S_ISDIR(st.st_mode) || S_ISBLK(st.st_mode)) {
return NULL;
}
#endif
#if !defined(PERLIO_IS_STDIO)
retio = PerlIO_openn(aTHX_ ":", PERL_SCRIPT_MODE, -1, 0, 0, NULL, 1, &name);
#else
retio = PerlIO_open(p, PERL_SCRIPT_MODE);
#endif
#ifdef WIN32
/* EACCES stops the INC search early in pp_require to implement
feature RT #113422 */
if(!retio && errno == EACCES) { /* exists but probably a directory */
int eno;
st_rc = PerlLIO_stat(p, &st);
if (st_rc >= 0) {
if(S_ISDIR(st.st_mode) || S_ISBLK(st.st_mode))
eno = 0;
else
eno = EACCES;
errno = eno;
}
}
#endif
return retio;
}
#ifndef PERL_DISABLE_PMC
STATIC PerlIO *
S_doopen_pm(pTHX_ SV *name)
{
STRLEN namelen;
const char *p = SvPV_const(name, namelen);
PERL_ARGS_ASSERT_DOOPEN_PM;
/* check the name before trying for the .pmc name to avoid the
* warning referring to the .pmc which the user probably doesn't
* know or care about
*/
if (!IS_SAFE_PATHNAME(p, namelen, "require"))
return NULL;
if (namelen > 3 && memEQs(p + namelen - 3, 3, ".pm")) {
SV *const pmcsv = sv_newmortal();
Stat_t pmcstat;
SvSetSV_nosteal(pmcsv,name);
sv_catpvs(pmcsv, "c");
if (PerlLIO_stat(SvPV_nolen_const(pmcsv), &pmcstat) >= 0)
return check_type_and_open(pmcsv);
}
return check_type_and_open(name);
}
#else
# define doopen_pm(name) check_type_and_open(name)
#endif /* !PERL_DISABLE_PMC */
/* require doesn't search for absolute names, or when the name is
explicitly relative the current directory */
PERL_STATIC_INLINE bool
S_path_is_searchable(const char *name)
{
PERL_ARGS_ASSERT_PATH_IS_SEARCHABLE;
if (PERL_FILE_IS_ABSOLUTE(name)
#ifdef WIN32
|| (*name == '.' && ((name[1] == '/' ||
(name[1] == '.' && name[2] == '/'))
|| (name[1] == '\\' ||
( name[1] == '.' && name[2] == '\\')))
)
#else
|| (*name == '.' && (name[1] == '/' ||
(name[1] == '.' && name[2] == '/')))
#endif
)
{
return FALSE;
}
else
return TRUE;
}
/* also used for: pp_dofile() */
PP(pp_require)
{
dSP;
PERL_CONTEXT *cx;
SV *sv;
const char *name;
STRLEN len;
char * unixname;
STRLEN unixlen;
#ifdef VMS
int vms_unixname = 0;
char *unixdir;
#endif
const char *tryname = NULL;
SV *namesv = NULL;
const I32 gimme = GIMME_V;
int filter_has_file = 0;
PerlIO *tryrsfp = NULL;
SV *filter_cache = NULL;
SV *filter_state = NULL;
SV *filter_sub = NULL;
SV *hook_sv = NULL;
OP *op;
int saved_errno;
bool path_searchable;
sv = POPs;
SvGETMAGIC(sv);
if ( (SvNIOKp(sv) || SvVOK(sv)) && PL_op->op_type != OP_DOFILE) {
sv = sv_2mortal(new_version(sv));
if (!Perl_sv_derived_from_pvn(aTHX_ PL_patchlevel, STR_WITH_LEN("version"), 0))
upg_version(PL_patchlevel, TRUE);
if (cUNOP->op_first->op_type == OP_CONST && cUNOP->op_first->op_private & OPpCONST_NOVER) {
if ( vcmp(sv,PL_patchlevel) <= 0 )
DIE(aTHX_ "Perls since %"SVf" too modern--this is %"SVf", stopped",
SVfARG(sv_2mortal(vnormal(sv))),
SVfARG(sv_2mortal(vnormal(PL_patchlevel)))
);
}
else {
if ( vcmp(sv,PL_patchlevel) > 0 ) {
I32 first = 0;
AV *lav;
SV * const req = SvRV(sv);
SV * const pv = *hv_fetchs(MUTABLE_HV(req), "original", FALSE);
/* get the left hand term */
lav = MUTABLE_AV(SvRV(*hv_fetchs(MUTABLE_HV(req), "version", FALSE)));
first = SvIV(*av_fetch(lav,0,0));
if ( first > (int)PERL_REVISION /* probably 'use 6.0' */
|| hv_exists(MUTABLE_HV(req), "qv", 2 ) /* qv style */
|| av_tindex(lav) > 1 /* FP with > 3 digits */
|| strstr(SvPVX(pv),".0") /* FP with leading 0 */
) {
DIE(aTHX_ "Perl %"SVf" required--this is only "
"%"SVf", stopped",
SVfARG(sv_2mortal(vnormal(req))),
SVfARG(sv_2mortal(vnormal(PL_patchlevel)))
);
}
else { /* probably 'use 5.10' or 'use 5.8' */
SV *hintsv;
I32 second = 0;
if (av_tindex(lav)>=1)
second = SvIV(*av_fetch(lav,1,0));
second /= second >= 600 ? 100 : 10;
hintsv = Perl_newSVpvf(aTHX_ "v%d.%d.0",
(int)first, (int)second);
upg_version(hintsv, TRUE);
DIE(aTHX_ "Perl %"SVf" required (did you mean %"SVf"?)"
"--this is only %"SVf", stopped",
SVfARG(sv_2mortal(vnormal(req))),
SVfARG(sv_2mortal(vnormal(sv_2mortal(hintsv)))),
SVfARG(sv_2mortal(vnormal(PL_patchlevel)))
);
}
}
}
RETPUSHYES;
}
if (!SvOK(sv))
DIE(aTHX_ "Missing or undefined argument to require");
name = SvPV_nomg_const(sv, len);
if (!(name && len > 0 && *name))
DIE(aTHX_ "Missing or undefined argument to require");
if (!IS_SAFE_PATHNAME(name, len, "require")) {
DIE(aTHX_ "Can't locate %s: %s",
pv_escape(newSVpvs_flags("",SVs_TEMP),SvPVX(sv),SvCUR(sv),
SvCUR(sv)*2,NULL, SvUTF8(sv)?PERL_PV_ESCAPE_UNI:0),
Strerror(ENOENT));
}
TAINT_PROPER("require");
path_searchable = path_is_searchable(name);
#ifdef VMS
/* The key in the %ENV hash is in the syntax of file passed as the argument
* usually this is in UNIX format, but sometimes in VMS format, which
* can result in a module being pulled in more than once.
* To prevent this, the key must be stored in UNIX format if the VMS
* name can be translated to UNIX.
*/
if ((unixname =
tounixspec(name, SvPVX(sv_2mortal(newSVpv("", VMS_MAXRSS-1)))))
!= NULL) {
unixlen = strlen(unixname);
vms_unixname = 1;
}
else
#endif
{
/* if not VMS or VMS name can not be translated to UNIX, pass it
* through.
*/
unixname = (char *) name;
unixlen = len;
}
if (PL_op->op_type == OP_REQUIRE) {
SV * const * const svp = hv_fetch(GvHVn(PL_incgv),
unixname, unixlen, 0);
if ( svp ) {
if (*svp != &PL_sv_undef)
RETPUSHYES;
else
DIE(aTHX_ "Attempt to reload %s aborted.\n"
"Compilation failed in require", unixname);
}
}
LOADING_FILE_PROBE(unixname);
/* prepare to compile file */
if (!path_searchable) {
/* At this point, name is SvPVX(sv) */
tryname = name;
tryrsfp = doopen_pm(sv);
}
if (!tryrsfp && !(errno == EACCES && !path_searchable)) {
AV * const ar = GvAVn(PL_incgv);
SSize_t i;
#ifdef VMS
if (vms_unixname)
#endif
{
SV *nsv = sv;
namesv = newSV_type(SVt_PV);
for (i = 0; i <= AvFILL(ar); i++) {
SV * const dirsv = *av_fetch(ar, i, TRUE);
SvGETMAGIC(dirsv);
if (SvROK(dirsv)) {
int count;
SV **svp;
SV *loader = dirsv;
if (SvTYPE(SvRV(loader)) == SVt_PVAV
&& !SvOBJECT(SvRV(loader)))
{
loader = *av_fetch(MUTABLE_AV(SvRV(loader)), 0, TRUE);
SvGETMAGIC(loader);
}
Perl_sv_setpvf(aTHX_ namesv, "/loader/0x%"UVxf"/%s",
PTR2UV(SvRV(dirsv)), name);
tryname = SvPVX_const(namesv);
tryrsfp = NULL;
if (SvPADTMP(nsv)) {
nsv = sv_newmortal();
SvSetSV_nosteal(nsv,sv);
}
ENTER_with_name("call_INC");
SAVETMPS;
EXTEND(SP, 2);
PUSHMARK(SP);
PUSHs(dirsv);
PUSHs(nsv);
PUTBACK;
if (SvGMAGICAL(loader)) {
SV *l = sv_newmortal();
sv_setsv_nomg(l, loader);
loader = l;
}
if (sv_isobject(loader))
count = call_method("INC", G_ARRAY);
else
count = call_sv(loader, G_ARRAY);
SPAGAIN;
if (count > 0) {
int i = 0;
SV *arg;
SP -= count - 1;
arg = SP[i++];
if (SvROK(arg) && (SvTYPE(SvRV(arg)) <= SVt_PVLV)
&& !isGV_with_GP(SvRV(arg))) {
filter_cache = SvRV(arg);
if (i < count) {
arg = SP[i++];
}
}
if (SvROK(arg) && isGV_with_GP(SvRV(arg))) {
arg = SvRV(arg);
}
if (isGV_with_GP(arg)) {
IO * const io = GvIO((const GV *)arg);
++filter_has_file;
if (io) {
tryrsfp = IoIFP(io);
if (IoOFP(io) && IoOFP(io) != IoIFP(io)) {
PerlIO_close(IoOFP(io));
}
IoIFP(io) = NULL;
IoOFP(io) = NULL;
}
if (i < count) {
arg = SP[i++];
}
}
if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVCV) {
filter_sub = arg;
SvREFCNT_inc_simple_void_NN(filter_sub);
if (i < count) {
filter_state = SP[i];
SvREFCNT_inc_simple_void(filter_state);
}
}
if (!tryrsfp && (filter_cache || filter_sub)) {
tryrsfp = PerlIO_open(BIT_BUCKET,
PERL_SCRIPT_MODE);
}
SP--;
}
/* FREETMPS may free our filter_cache */
SvREFCNT_inc_simple_void(filter_cache);
PUTBACK;
FREETMPS;
LEAVE_with_name("call_INC");
/* Now re-mortalize it. */
sv_2mortal(filter_cache);
/* Adjust file name if the hook has set an %INC entry.
This needs to happen after the FREETMPS above. */
svp = hv_fetch(GvHVn(PL_incgv), name, len, 0);
if (svp)
tryname = SvPV_nolen_const(*svp);
if (tryrsfp) {
hook_sv = dirsv;
break;
}
filter_has_file = 0;
filter_cache = NULL;
if (filter_state) {
SvREFCNT_dec_NN(filter_state);
filter_state = NULL;
}
if (filter_sub) {
SvREFCNT_dec_NN(filter_sub);
filter_sub = NULL;