{
SV **where;
- if (!gv || SvTYPE((const SV *)gv) != SVt_PVGV) {
+ if (
+ !gv
+ || (
+ SvTYPE((const SV *)gv) != SVt_PVGV
+ && SvTYPE((const SV *)gv) != SVt_PVLV
+ )
+ ) {
const char *what;
if (type == SVt_PVIO) {
/*
#else
sv_setpvn(GvSV(gv), name, namelen);
#endif
- if (PERLDB_LINE || PERLDB_SAVESRC)
- hv_magic(GvHVn(gv_AVadd(gv)), NULL, PERL_MAGIC_dbfile);
}
+ if ((PERLDB_LINE || PERLDB_SAVESRC) && !GvAV(gv))
+ hv_magic(GvHVn(gv_AVadd(gv)), NULL, PERL_MAGIC_dbfile);
if (tmpbuf != smallbuf)
Safefree(tmpbuf);
return gv;
return gp;
}
+/* Assign CvGV(cv) = gv, handling weak references.
+ * See also S_anonymise_cv_maybe */
+
+void
+Perl_cvgv_set(pTHX_ CV* cv, GV* gv)
+{
+ GV * const oldgv = CvGV(cv);
+ PERL_ARGS_ASSERT_CVGV_SET;
+
+ if (oldgv == gv)
+ return;
+
+ if (oldgv) {
+ if (CvCVGV_RC(cv)) {
+ SvREFCNT_dec(oldgv);
+ CvCVGV_RC_off(cv);
+ }
+ else {
+ sv_del_backref(MUTABLE_SV(oldgv), MUTABLE_SV(cv));
+ }
+ }
+
+ SvANY(cv)->xcv_gv = gv;
+ assert(!CvCVGV_RC(cv));
+
+ if (!gv)
+ return;
+
+ if (isGV_with_GP(gv) && GvGP(gv) && (GvCV(gv) == cv || GvFORM(gv) == cv))
+ Perl_sv_add_backref(aTHX_ MUTABLE_SV(gv), MUTABLE_SV(cv));
+ else {
+ CvCVGV_RC_on(cv);
+ SvREFCNT_inc_simple_void_NN(gv);
+ }
+}
+
+
void
Perl_gv_init(pTHX_ GV *gv, HV *stash, const char *name, STRLEN len, int multi)
{
if (multi || doproto) /* doproto means it _was_ mentioned */
GvMULTI_on(gv);
if (doproto) { /* Replicate part of newSUB here. */
+ CV *cv;
ENTER;
if (has_constant) {
+ char *name0 = NULL;
+ if (name[len])
+ /* newCONSTSUB doesn't take a len arg, so make sure we
+ * give it a \0-terminated string */
+ name0 = savepvn(name,len);
+
/* newCONSTSUB takes ownership of the reference from us. */
- GvCV(gv) = newCONSTSUB(stash, name, has_constant);
+ cv = newCONSTSUB(stash, (name0 ? name0 : name), has_constant);
+ assert(GvCV(gv) == cv); /* newCONSTSUB should have set this */
+ if (name0)
+ Safefree(name0);
/* If this reference was a copy of another, then the subroutine
must have been "imported", by a Perl space assignment to a GV
from a reference to CV. */
GvIMPORTED_CV_on(gv);
} else {
(void) start_subparse(0,0); /* Create empty CV in compcv. */
- GvCV(gv) = PL_compcv;
+ cv = PL_compcv;
+ GvCV(gv) = cv;
}
LEAVE;
mro_method_changed_in(GvSTASH(gv)); /* sub Foo::bar($) { (shift) } sub ASDF::baz($); *ASDF::baz = \&Foo::bar */
- CvGV(GvCV(gv)) = gv;
- CvFILE_set_from_cop(GvCV(gv), PL_curcop);
- CvSTASH(GvCV(gv)) = PL_curstash;
+ CvGV_set(cv, gv);
+ CvFILE_set_from_cop(cv, PL_curcop);
+ CvSTASH(cv) = PL_curstash;
+ if (PL_curstash)
+ Perl_sv_add_backref(aTHX_ MUTABLE_SV(PL_curstash), MUTABLE_SV(cv));
if (proto) {
- sv_usepvn_flags(MUTABLE_SV(GvCV(gv)), proto, protolen,
+ sv_usepvn_flags(MUTABLE_SV(cv), proto, protolen,
SV_HAS_TRAILING_NUL);
}
}
* pass along the same data via some unused fields in the CV
*/
CvSTASH(cv) = stash;
+ if (stash)
+ Perl_sv_add_backref(aTHX_ MUTABLE_SV(stash), MUTABLE_SV(cv));
SvPV_set(cv, (char *)name); /* cast to lose constness warning */
SvCUR_set(cv, len);
return gv;
return gv_fetchpvn_flags(nambeg, len, flags | SvUTF8(name), sv_type);
}
+STATIC void
+S_gv_magicalize_isa(pTHX_ GV *gv, const char *nambeg, I32 add)
+{
+ AV* av;
+
+ PERL_ARGS_ASSERT_GV_MAGICALIZE_ISA;
+
+ av = GvAVn(gv);
+ GvMULTI_on(gv);
+ sv_magic(MUTABLE_SV(av), MUTABLE_SV(gv), PERL_MAGIC_isa,
+ NULL, 0);
+ /* NOTE: No support for tied ISA */
+ if ((add & GV_ADDMULTI) && strEQ(nambeg,"AnyDBM_File::ISA")
+ && AvFILLp(av) == -1)
+ {
+ av_push(av, newSVpvs("NDBM_File"));
+ gv_stashpvs("NDBM_File", GV_ADD);
+ av_push(av, newSVpvs("DB_File"));
+ gv_stashpvs("DB_File", GV_ADD);
+ av_push(av, newSVpvs("GDBM_File"));
+ gv_stashpvs("GDBM_File", GV_ADD);
+ av_push(av, newSVpvs("SDBM_File"));
+ gv_stashpvs("SDBM_File", GV_ADD);
+ av_push(av, newSVpvs("ODBM_File"));
+ gv_stashpvs("ODBM_File", GV_ADD);
+ }
+}
+
+STATIC void
+S_gv_magicalize_overload(pTHX_ GV *gv)
+{
+ HV* hv;
+
+ PERL_ARGS_ASSERT_GV_MAGICALIZE_OVERLOAD;
+
+ hv = GvHVn(gv);
+ GvMULTI_on(gv);
+ hv_magic(hv, NULL, PERL_MAGIC_overload);
+}
+
GV *
Perl_gv_fetchpvn_flags(pTHX_ const char *nambeg, STRLEN full_len, I32 flags,
const svtype sv_type)
GvMULTI_on(gv) ;
/* set up magic where warranted */
- if (len > 1) {
+ if (stash != PL_defstash) { /* not the main stash */
+ /* We only have to check for four names here: EXPORT, ISA, OVERLOAD
+ and VERSION. All the others apply only to the main stash. */
+ if (len > 1) {
+ const char * const name2 = name + 1;
+ switch (*name) {
+ case 'E':
+ if (strnEQ(name2, "XPORT", 5))
+ GvMULTI_on(gv);
+ break;
+ case 'I':
+ if (strEQ(name2, "SA"))
+ gv_magicalize_isa(gv, nambeg, add);
+ break;
+ case 'O':
+ if (strEQ(name2, "VERLOAD"))
+ gv_magicalize_overload(gv);
+ break;
+ case 'V':
+ if (strEQ(name2, "ERSION"))
+ GvMULTI_on(gv);
+ break;
+ }
+ }
+ }
+ else if (len > 1) {
#ifndef EBCDIC
if (*name > 'V' ) {
NOOP;
break;
case 'I':
if (strEQ(name2, "SA")) {
- AV* const av = GvAVn(gv);
- GvMULTI_on(gv);
- sv_magic(MUTABLE_SV(av), MUTABLE_SV(gv), PERL_MAGIC_isa,
- NULL, 0);
- /* NOTE: No support for tied ISA */
- if ((add & GV_ADDMULTI) && strEQ(nambeg,"AnyDBM_File::ISA")
- && AvFILLp(av) == -1)
- {
- av_push(av, newSVpvs("NDBM_File"));
- gv_stashpvs("NDBM_File", GV_ADD);
- av_push(av, newSVpvs("DB_File"));
- gv_stashpvs("DB_File", GV_ADD);
- av_push(av, newSVpvs("GDBM_File"));
- gv_stashpvs("GDBM_File", GV_ADD);
- av_push(av, newSVpvs("SDBM_File"));
- gv_stashpvs("SDBM_File", GV_ADD);
- av_push(av, newSVpvs("ODBM_File"));
- gv_stashpvs("ODBM_File", GV_ADD);
- }
+ gv_magicalize_isa(gv, nambeg, add);
}
break;
case 'O':
if (strEQ(name2, "VERLOAD")) {
- HV* const hv = GvHVn(gv);
- GvMULTI_on(gv);
- hv_magic(hv, NULL, PERL_MAGIC_overload);
+ gv_magicalize_overload(gv);
}
break;
case 'S':
SV **gvp;
PERL_ARGS_ASSERT_GV_TRY_DOWNGRADE;
if (!(SvREFCNT(gv) == 1 && SvTYPE(gv) == SVt_PVGV && !SvFAKE(gv) &&
- !SvOBJECT(gv) && !SvMAGICAL(gv) && !SvREADONLY(gv) &&
+ !SvOBJECT(gv) && !SvREADONLY(gv) &&
isGV_with_GP(gv) && GvGP(gv) &&
!GvINTRO(gv) && GvREFCNT(gv) == 1 &&
!GvSV(gv) && !GvAV(gv) && !GvHV(gv) && !GvIOp(gv) && !GvFORM(gv) &&
GvEGVx(gv) == gv && (stash = GvSTASH(gv))))
return;
+ if (SvMAGICAL(gv)) {
+ MAGIC *mg;
+ /* only backref magic is allowed */
+ if (SvGMAGICAL(gv) || SvSMAGICAL(gv))
+ return;
+ for (mg = SvMAGIC(gv); mg; mg = mg->mg_moremagic) {
+ if (mg->mg_type != PERL_MAGIC_backref)
+ return;
+ }
+ }
cv = GvCV(gv);
if (!cv) {
HEK *gvnhek = GvNAME_HEK(gv);
https://perl5.git.perl.org / perl5.git / blobdiff