executing). Require'd files are simply evals without any outer lexical
scope.
-XSUBs don't have CvPADLIST set - dXSTARG fetches values from PL_curpad,
+XSUBs do not have a CvPADLIST. dXSTARG fetches values from PL_curpad,
but that is really the callers pad (a slot of which is allocated by
-every entersub).
+every entersub). Do not get or set CvPADLIST if a CV is an XSUB (as
+determined by C<CvISXSUB()>), CvPADLIST slot is reused for a different
+internal purpose in XSUBs.
The PADLIST has a C array where pads are stored.
STRLEN cur1 = SvCUR(sv);
const char *pv2 = pv;
STRLEN cur2 = pvlen;
- if (PL_encoding) {
+ if (IN_ENCODING) {
SV* svrecode = NULL;
if (SvUTF8(sv)) {
svrecode = newSVpvn(pv2, cur2);
- sv_recode_to_utf8(svrecode, PL_encoding);
+ sv_recode_to_utf8(svrecode, _get_encoding());
pv2 = SvPV_const(svrecode, cur2);
}
else {
svrecode = newSVpvn(pv1, cur1);
- sv_recode_to_utf8(svrecode, PL_encoding);
+ sv_recode_to_utf8(svrecode, _get_encoding());
pv1 = SvPV_const(svrecode, cur1);
}
SvREFCNT_dec_NN(svrecode);
|| memEQ(SvPVX_const(sv), pv, pvlen));
}
+#ifdef DEBUGGING
+void
+Perl_set_padlist(CV * cv, PADLIST *padlist){
+ PERL_ARGS_ASSERT_SET_PADLIST;
+# if PTRSIZE == 8
+ if((Size_t)padlist == UINT64_C(0xEFEFEFEFEFEFEFEF)){
+ assert(0);
+ }
+# elif PTRSIZE == 4
+ if((Size_t)padlist == UINT64_C(0xEFEFEFEF)){
+ assert(0);
+ }
+# else
+# error unknown pointer size
+# endif
+ if(CvISXSUB(cv)){
+ assert(0);
+ }
+ ((XPVCV*)MUTABLE_PTR(SvANY(cv)))->xcv_padlist_u.xcv_padlist = padlist;
+}
+#endif
/*
=for apidoc Am|PADLIST *|pad_new|int flags
void
Perl_cv_undef_flags(pTHX_ CV *cv, U32 flags)
{
- const PADLIST *padlist = CvPADLIST(cv);
- bool const slabbed = !!CvSLABBED(cv);
+ CV cvbody;/*CV body will never be realloced inside this func,
+ so dont read it more than once, use fake CV so existing macros
+ will work, the indirection and CV head struct optimized away*/
+ SvANY(&cvbody) = SvANY(cv);
PERL_ARGS_ASSERT_CV_UNDEF_FLAGS;
PTR2UV(cv), PTR2UV(PL_comppad))
);
- if (CvFILE(cv) && CvDYNFILE(cv)) {
- Safefree(CvFILE(cv));
+ if (CvFILE(&cvbody)) {
+ char * file = CvFILE(&cvbody);
+ CvFILE(&cvbody) = NULL;
+ if(CvDYNFILE(&cvbody))
+ Safefree(file);
}
- CvFILE(cv) = NULL;
- CvSLABBED_off(cv);
- if (!CvISXSUB(cv) && CvROOT(cv)) {
- if (SvTYPE(cv) == SVt_PVCV && CvDEPTH(cv))
- Perl_croak(aTHX_ "Can't undef active subroutine");
- ENTER;
-
- PAD_SAVE_SETNULLPAD();
-
- if (slabbed) OpslabREFCNT_dec_padok(OpSLAB(CvROOT(cv)));
- op_free(CvROOT(cv));
- CvROOT(cv) = NULL;
- CvSTART(cv) = NULL;
- LEAVE;
- }
- else if (slabbed && CvSTART(cv)) {
- ENTER;
- PAD_SAVE_SETNULLPAD();
-
- /* discard any leaked ops */
- if (PL_parser)
- parser_free_nexttoke_ops(PL_parser, (OPSLAB *)CvSTART(cv));
- opslab_force_free((OPSLAB *)CvSTART(cv));
- CvSTART(cv) = NULL;
-
- LEAVE;
- }
+ /* CvSLABBED_off(&cvbody); *//* turned off below */
+ /* release the sub's body */
+ if (!CvISXSUB(&cvbody)) {
+ if(CvROOT(&cvbody)) {
+ assert(SvTYPE(cv) == SVt_PVCV || SvTYPE(cv) == SVt_PVFM); /*unsafe is safe */
+ if (CvDEPTHunsafe(&cvbody)) {
+ assert(SvTYPE(cv) == SVt_PVCV);
+ Perl_croak_nocontext("Can't undef active subroutine");
+ }
+ ENTER;
+
+ PAD_SAVE_SETNULLPAD();
+
+ if (CvSLABBED(&cvbody)) OpslabREFCNT_dec_padok(OpSLAB(CvROOT(&cvbody)));
+ op_free(CvROOT(&cvbody));
+ CvROOT(&cvbody) = NULL;
+ CvSTART(&cvbody) = NULL;
+ LEAVE;
+ }
+ else if (CvSLABBED(&cvbody)) {
+ if( CvSTART(&cvbody)) {
+ ENTER;
+ PAD_SAVE_SETNULLPAD();
+
+ /* discard any leaked ops */
+ if (PL_parser)
+ parser_free_nexttoke_ops(PL_parser, (OPSLAB *)CvSTART(&cvbody));
+ opslab_force_free((OPSLAB *)CvSTART(&cvbody));
+ CvSTART(&cvbody) = NULL;
+
+ LEAVE;
+ }
#ifdef DEBUGGING
- else if (slabbed) Perl_warn(aTHX_ "Slab leaked from cv %p", (void*)cv);
+ else Perl_warn(aTHX_ "Slab leaked from cv %p", (void*)cv);
#endif
+ }
+ }
+ else { /* dont bother checking if CvXSUB(cv) is true, less branching */
+ CvXSUB(&cvbody) = NULL;
+ }
SvPOK_off(MUTABLE_SV(cv)); /* forget prototype */
sv_unmagic((SV *)cv, PERL_MAGIC_checkcall);
if (!(flags & CV_UNDEF_KEEP_NAME)) {
- if (CvNAMED(cv)) {
- CvNAME_HEK_set(cv, NULL);
- CvNAMED_off(cv);
+ if (CvNAMED(&cvbody)) {
+ CvNAME_HEK_set(&cvbody, NULL);
+ CvNAMED_off(&cvbody);
}
else CvGV_set(cv, NULL);
}
/* This statement and the subsequence if block was pad_undef(). */
pad_peg("pad_undef");
- if (padlist) {
+ if (!CvISXSUB(&cvbody) && CvPADLIST(&cvbody)) {
I32 ix;
+ const PADLIST *padlist = CvPADLIST(&cvbody);
/* Free the padlist associated with a CV.
If parts of it happen to be current, we null the relevant PL_*pad*
* children, or integrate this loop with general cleanup */
if (PL_phase != PERL_PHASE_DESTRUCT) { /* don't bother during global destruction */
- CV * const outercv = CvOUTSIDE(cv);
- const U32 seq = CvOUTSIDE_SEQ(cv);
+ CV * const outercv = CvOUTSIDE(&cvbody);
+ const U32 seq = CvOUTSIDE_SEQ(&cvbody);
PAD * const comppad_name = PadlistARRAY(padlist)[0];
SV ** const namepad = AvARRAY(comppad_name);
PAD * const comppad = PadlistARRAY(padlist)[1];
}
if (PadlistARRAY(padlist)) Safefree(PadlistARRAY(padlist));
Safefree(padlist);
- CvPADLIST(cv) = NULL;
+ CvPADLIST_set(&cvbody, NULL);
}
+ else if (CvISXSUB(&cvbody))
+ CvHSCXT(&cvbody) = NULL;
+ /* else is (!CvISXSUB(&cvbody) && !CvPADLIST(&cvbody)) {do nothing;} */
/* remove CvOUTSIDE unless this is an undef rather than a free */
- if (!SvREFCNT(cv) && CvOUTSIDE(cv)) {
- if (!CvWEAKOUTSIDE(cv))
- SvREFCNT_dec(CvOUTSIDE(cv));
- CvOUTSIDE(cv) = NULL;
- }
- if (CvCONST(cv)) {
- SvREFCNT_dec(MUTABLE_SV(CvXSUBANY(cv).any_ptr));
- CvCONST_off(cv);
+ if (!SvREFCNT(cv)) {
+ CV * outside = CvOUTSIDE(&cvbody);
+ if(outside) {
+ CvOUTSIDE(&cvbody) = NULL;
+ if (!CvWEAKOUTSIDE(&cvbody))
+ SvREFCNT_dec_NN(outside);
+ }
}
- if (CvISXSUB(cv) && CvXSUB(cv)) {
- CvXSUB(cv) = NULL;
+ if (CvCONST(&cvbody)) {
+ SvREFCNT_dec(MUTABLE_SV(CvXSUBANY(&cvbody).any_ptr));
+ /* CvCONST_off(cv); *//* turned off below */
}
/* delete all flags except WEAKOUTSIDE and CVGV_RC, which indicate the
* ref status of CvOUTSIDE and CvGV, and ANON, NAMED and
* LEXICAL, which are used to determine the sub's name. */
- CvFLAGS(cv) &= (CVf_WEAKOUTSIDE|CVf_CVGV_RC|CVf_ANON|CVf_LEXICAL
+ CvFLAGS(&cvbody) &= (CVf_WEAKOUTSIDE|CVf_CVGV_RC|CVf_ANON|CVf_LEXICAL
|CVf_NAMED);
}
fake_offset = offset; /* in case we don't find a real one */
continue;
}
- /* is seq within the range _LOW to _HIGH ?
- * This is complicated by the fact that PL_cop_seqmax
- * may have wrapped around at some point */
- if (COP_SEQ_RANGE_LOW(namesv) == PERL_PADSEQ_INTRO)
- continue; /* not yet introduced */
-
- if (COP_SEQ_RANGE_HIGH(namesv) == PERL_PADSEQ_INTRO) {
- /* in compiling scope */
- if (
- (seq > COP_SEQ_RANGE_LOW(namesv))
- ? (seq - COP_SEQ_RANGE_LOW(namesv) < (U32_MAX >> 1))
- : (COP_SEQ_RANGE_LOW(namesv) - seq > (U32_MAX >> 1))
- )
- break;
- }
- else if (
- (COP_SEQ_RANGE_LOW(namesv) > COP_SEQ_RANGE_HIGH(namesv))
- ?
- ( seq > COP_SEQ_RANGE_LOW(namesv)
- || seq <= COP_SEQ_RANGE_HIGH(namesv))
-
- : ( seq > COP_SEQ_RANGE_LOW(namesv)
- && seq <= COP_SEQ_RANGE_HIGH(namesv))
- )
- break;
+ if (PadnameIN_SCOPE(namesv, seq))
+ break;
}
}
U32 seq;
ASSERT_CURPAD_ACTIVE("intro_my");
+ if (PL_compiling.cop_seq) {
+ seq = PL_compiling.cop_seq;
+ PL_compiling.cop_seq = 0;
+ }
+ else
+ seq = PL_cop_seqmax;
if (! PL_min_intro_pending)
- return PL_cop_seqmax;
+ return seq;
svp = AvARRAY(PL_comppad_name);
for (i = PL_min_intro_pending; i <= PL_max_intro_pending; i++) {
);
}
}
- seq = PL_cop_seqmax;
- PL_cop_seqmax++;
- if (PL_cop_seqmax == PERL_PADSEQ_INTRO) /* not a legal value */
- PL_cop_seqmax++;
+ COP_SEQMAX_INC;
PL_min_intro_pending = 0;
PL_comppad_name_fill = PL_max_intro_pending; /* Needn't search higher */
DEBUG_Xv(PerlIO_printf(Perl_debug_log,
}
}
}
- PL_cop_seqmax++;
- if (PL_cop_seqmax == PERL_PADSEQ_INTRO) /* not a legal value */
- PL_cop_seqmax++;
+ COP_SEQMAX_INC;
DEBUG_Xv(PerlIO_printf(Perl_debug_log,
"Pad leavemy: seq = %ld\n", (long)PL_cop_seqmax));
return o;
static CV *S_cv_clone(pTHX_ CV *proto, CV *cv, CV *outside);
-static void
+static CV *
S_cv_clone_pad(pTHX_ CV *proto, CV *cv, CV *outside, bool newcv)
{
I32 ix;
SAVESPTR(PL_comppad_name);
PL_comppad_name = protopad_name;
- CvPADLIST(cv) = pad_new(padnew_CLONE|padnew_SAVE);
+ CvPADLIST_set(cv, pad_new(padnew_CLONE|padnew_SAVE));
av_fill(PL_comppad, fpad);
CvNAME_HEK_set(
sv,
share_hek(SvPVX_const(namesv)+1,
- SvCUR(namesv) - 1
+ (SvCUR(namesv) - 1)
* (SvUTF8(namesv) ? -1 : 1),
hash)
);
if (newcv) SvREFCNT_inc_simple_void_NN(cv);
LEAVE;
+
+ if (CvCONST(cv)) {
+ /* Constant sub () { $x } closing over $x:
+ * The prototype was marked as a candiate for const-ization,
+ * so try to grab the current const value, and if successful,
+ * turn into a const sub:
+ */
+ SV* const_sv;
+ OP *o = CvSTART(cv);
+ assert(newcv);
+ for (; o; o = o->op_next)
+ if (o->op_type == OP_PADSV)
+ break;
+ ASSUME(o->op_type == OP_PADSV);
+ const_sv = PAD_BASE_SV(CvPADLIST(cv), o->op_targ);
+ /* the candidate should have 1 ref from this pad and 1 ref
+ * from the parent */
+ if (const_sv && SvREFCNT(const_sv) == 2) {
+ const bool was_method = cBOOL(CvMETHOD(cv));
+ bool copied = FALSE;
+ if (outside) {
+ PADNAME * const pn =
+ PadlistNAMESARRAY(CvPADLIST(outside))
+ [PARENT_PAD_INDEX(PadlistNAMESARRAY(
+ CvPADLIST(cv))[o->op_targ])];
+ assert(PadnameOUTER(PadlistNAMESARRAY(CvPADLIST(cv))
+ [o->op_targ]));
+ if (PadnameLVALUE(pn)) {
+ /* We have a lexical that is potentially modifiable
+ elsewhere, so making a constant will break clo-
+ sure behaviour. If this is a ‘simple lexical
+ op tree’, i.e., sub(){$x}, emit a deprecation
+ warning, but continue to exhibit the old behav-
+ iour of making it a constant based on the ref-
+ count of the candidate variable.
+
+ A simple lexical op tree looks like this:
+
+ leavesub
+ lineseq
+ nextstate
+ padsv
+ */
+ if (OP_SIBLING(
+ cUNOPx(cUNOPx(CvROOT(cv))->op_first)->op_first
+ ) == o
+ && !OP_SIBLING(o))
+ {
+ Perl_ck_warner_d(aTHX_
+ packWARN(WARN_DEPRECATED),
+ "Constants from lexical "
+ "variables potentially "
+ "modified elsewhere are "
+ "deprecated");
+ /* We *copy* the lexical variable, and donate the
+ copy to newCONSTSUB. Yes, this is ugly, and
+ should be killed. We need to do this for the
+ time being, however, because turning on SvPADTMP
+ on a lexical will have observable effects
+ elsewhere. */
+ const_sv = newSVsv(const_sv);
+ copied = TRUE;
+ }
+ else
+ goto constoff;
+ }
+ }
+ if (!copied)
+ SvREFCNT_inc_simple_void_NN(const_sv);
+ /* If the lexical is not used elsewhere, it is safe to turn on
+ SvPADTMP, since it is only when it is used in lvalue con-
+ text that the difference is observable. */
+ SvREADONLY_on(const_sv);
+ SvPADTMP_on(const_sv);
+ SvREFCNT_dec_NN(cv);
+ cv = newCONSTSUB(CvSTASH(proto), NULL, const_sv);
+ if (was_method)
+ CvMETHOD_on(cv);
+ }
+ else {
+ constoff:
+ CvCONST_off(cv);
+ }
+ }
+
+ return cv;
}
static CV *
if (SvMAGIC(proto))
mg_copy((SV *)proto, (SV *)cv, 0, 0);
- if (CvPADLIST(proto)) S_cv_clone_pad(aTHX_ proto, cv, outside, newcv);
+ if (CvPADLIST(proto))
+ cv = S_cv_clone_pad(aTHX_ proto, cv, outside, newcv);
DEBUG_Xv(
PerlIO_printf(Perl_debug_log, "\nPad CV clone\n");
cv_dump(cv, "To");
);
- if (CvCONST(cv)) {
- /* Constant sub () { $x } closing over $x - see lib/constant.pm:
- * The prototype was marked as a candiate for const-ization,
- * so try to grab the current const value, and if successful,
- * turn into a const sub:
- */
- SV* const const_sv = op_const_sv(CvSTART(cv), cv);
- if (const_sv) {
- SvREFCNT_dec_NN(cv);
- /* For this calling case, op_const_sv returns a *copy*, which we
- donate to newCONSTSUB. Yes, this is ugly, and should be killed.
- Need to fix how lib/constant.pm works to eliminate this. */
- cv = newCONSTSUB(CvSTASH(proto), NULL, const_sv);
- }
- else {
- CvCONST_off(cv);
- }
- }
-
return cv;
}
PERL_ARGS_ASSERT_PADLIST_DUP;
- if (!srcpad)
- return NULL;
-
cloneall = param->flags & CLONEf_COPY_STACKS
|| SvREFCNT(PadlistARRAY(srcpad)[1]) > 1;
assert (SvREFCNT(PadlistARRAY(srcpad)[1]) == 1);
https://perl5.git.perl.org / perl5.git / blobdiff