},
/* 8 bytes on most ILP32 with IEEE doubles */
- { sizeof(NV), sizeof(NV), 0, SVt_NV, FALSE, HADNV, HASARENA,
- FIT_ARENA(0, sizeof(NV)) },
+ { sizeof(NV), sizeof(NV),
+ STRUCT_OFFSET(XPVNV, xnv_u),
+ SVt_NV, FALSE, HADNV, HASARENA, FIT_ARENA(0, sizeof(NV)) },
/* 8 bytes on most ILP32 with IEEE doubles */
- { sizeof(XPV) - STRUCT_OFFSET(XPV, xpv_cur),
+ { sizeof(XPV),
copy_length(XPV, xpv_len) - STRUCT_OFFSET(XPV, xpv_cur),
+ STRUCT_OFFSET(XPV, xpv_cur),
SVt_PV, FALSE, NONV, HASARENA,
FIT_ARENA(0, sizeof(XPV) - STRUCT_OFFSET(XPV, xpv_cur)) },
+#if 2 *PTRSIZE <= IVSIZE
/* 12 */
- { sizeof(XPVIV) - STRUCT_OFFSET(XPV, xpv_cur),
+ { sizeof(XPVIV),
copy_length(XPVIV, xiv_u) - STRUCT_OFFSET(XPV, xpv_cur),
- + STRUCT_OFFSET(XPVIV, xpv_cur),
+ + STRUCT_OFFSET(XPV, xpv_cur),
SVt_PVIV, FALSE, NONV, HASARENA,
- FIT_ARENA(0, sizeof(XPV) - STRUCT_OFFSET(XPV, xpv_cur)) },
+ FIT_ARENA(0, sizeof(XPVIV) - STRUCT_OFFSET(XPV, xpv_cur)) },
+ /* 12 */
+#else
+ { sizeof(XPVIV),
+ copy_length(XPVIV, xiv_u),
+ 0,
+ SVt_PVIV, FALSE, NONV, HASARENA,
+ FIT_ARENA(0, sizeof(XPVIV)) },
+#endif
+#if (2 *PTRSIZE <= IVSIZE) && (2 *PTRSIZE <= NVSIZE)
+ /* 20 */
+ { sizeof(XPVNV),
+ copy_length(XPVNV, xnv_u) - STRUCT_OFFSET(XPV, xpv_cur),
+ + STRUCT_OFFSET(XPV, xpv_cur),
+ SVt_PVNV, FALSE, HADNV, HASARENA,
+ FIT_ARENA(0, sizeof(XPVNV) - STRUCT_OFFSET(XPV, xpv_cur)) },
+#else
/* 20 */
- { sizeof(XPVNV), copy_length(XPVNV, xiv_u), 0, SVt_PVNV, FALSE, HADNV,
+ { sizeof(XPVNV), copy_length(XPVNV, xnv_u), 0, SVt_PVNV, FALSE, HADNV,
HASARENA, FIT_ARENA(0, sizeof(XPVNV)) },
+#endif
/* 28 */
- { sizeof(XPVMG), copy_length(XPVMG, xmg_stash), 0, SVt_PVMG, FALSE, HADNV,
+ { sizeof(XPVMG), copy_length(XPVMG, xnv_u), 0, SVt_PVMG, FALSE, HADNV,
HASARENA, FIT_ARENA(0, sizeof(XPVMG)) },
/* something big */
- { sizeof(regexp) - STRUCT_OFFSET(regexp, xpv_cur),
- sizeof(regexp) - STRUCT_OFFSET(regexp, xpv_cur),
- + STRUCT_OFFSET(regexp, xpv_cur),
+ { sizeof(regexp),
+ sizeof(regexp),
+ 0,
SVt_REGEXP, FALSE, NONV, HASARENA,
FIT_ARENA(0, sizeof(regexp) - STRUCT_OFFSET(regexp, xpv_cur))
},
{ sizeof(XPVLV), sizeof(XPVLV), 0, SVt_PVLV, TRUE, HADNV,
HASARENA, FIT_ARENA(0, sizeof(XPVLV)) },
- { sizeof(XPVAV) - STRUCT_OFFSET(XPVAV, xav_fill),
- copy_length(XPVAV, xmg_stash) - STRUCT_OFFSET(XPVAV, xav_fill),
- + STRUCT_OFFSET(XPVAV, xav_fill),
+ { sizeof(XPVAV),
+ copy_length(XPVAV, xav_alloc),
+ 0,
SVt_PVAV, TRUE, NONV, HASARENA,
- FIT_ARENA(0, sizeof(XPVAV) - STRUCT_OFFSET(XPVAV, xav_fill)) },
+ FIT_ARENA(0, sizeof(XPVAV)) },
- { sizeof(XPVHV) - STRUCT_OFFSET(XPVHV, xhv_fill),
- copy_length(XPVHV, xmg_stash) - STRUCT_OFFSET(XPVHV, xhv_fill),
- + STRUCT_OFFSET(XPVHV, xhv_fill),
+ { sizeof(XPVHV),
+ copy_length(XPVHV, xhv_max),
+ 0,
SVt_PVHV, TRUE, NONV, HASARENA,
- FIT_ARENA(0, sizeof(XPVHV) - STRUCT_OFFSET(XPVHV, xhv_fill)) },
+ FIT_ARENA(0, sizeof(XPVHV)) },
/* 56 */
- { sizeof(XPVCV) - STRUCT_OFFSET(XPVCV, xpv_cur),
- sizeof(XPVCV) - STRUCT_OFFSET(XPVCV, xpv_cur),
- + STRUCT_OFFSET(XPVCV, xpv_cur),
+ { sizeof(XPVCV),
+ sizeof(XPVCV),
+ 0,
SVt_PVCV, TRUE, NONV, HASARENA,
- FIT_ARENA(0, sizeof(XPVCV) - STRUCT_OFFSET(XPVCV, xpv_cur)) },
+ FIT_ARENA(0, sizeof(XPVCV)) },
- { sizeof(XPVFM) - STRUCT_OFFSET(XPVFM, xpv_cur),
- sizeof(XPVFM) - STRUCT_OFFSET(XPVFM, xpv_cur),
- + STRUCT_OFFSET(XPVFM, xpv_cur),
+ { sizeof(XPVFM),
+ sizeof(XPVFM),
+ 0,
SVt_PVFM, TRUE, NONV, NOARENA,
- FIT_ARENA(20, sizeof(XPVFM) - STRUCT_OFFSET(XPVFM, xpv_cur)) },
+ FIT_ARENA(20, sizeof(XPVFM)) },
/* XPVIO is 84 bytes, fits 48x */
- { sizeof(XPVIO) - STRUCT_OFFSET(XPVIO, xpv_cur),
- sizeof(XPVIO) - STRUCT_OFFSET(XPVIO, xpv_cur),
- + STRUCT_OFFSET(XPVIO, xpv_cur),
+ { sizeof(XPVIO),
+ sizeof(XPVIO),
+ 0,
SVt_PVIO, TRUE, NONV, HASARENA,
- FIT_ARENA(24, sizeof(XPVIO) - STRUCT_OFFSET(XPVIO, xpv_cur)) },
+ FIT_ARENA(24, sizeof(XPVIO)) },
};
-#define new_body_type(sv_type) \
- (void *)((char *)S_new_body(aTHX_ sv_type))
-
-#define del_body_type(p, sv_type) \
- del_body(p, &PL_body_roots[sv_type])
-
-
#define new_body_allocated(sv_type) \
(void *)((char *)S_new_body(aTHX_ sv_type) \
- bodies_by_type[sv_type].offset)
#else /* !PURIFY */
-#define new_XNV() new_body_type(SVt_NV)
-#define del_XNV(p) del_body_type(p, SVt_NV)
+#define new_XNV() new_body_allocated(SVt_NV)
+#define del_XNV(p) del_body_allocated(p, SVt_NV)
-#define new_XPVNV() new_body_type(SVt_PVNV)
-#define del_XPVNV(p) del_body_type(p, SVt_PVNV)
+#define new_XPVNV() new_body_allocated(SVt_PVNV)
+#define del_XPVNV(p) del_body_allocated(p, SVt_PVNV)
#define new_XPVAV() new_body_allocated(SVt_PVAV)
#define del_XPVAV(p) del_body_allocated(p, SVt_PVAV)
#define new_XPVHV() new_body_allocated(SVt_PVHV)
#define del_XPVHV(p) del_body_allocated(p, SVt_PVHV)
-#define new_XPVMG() new_body_type(SVt_PVMG)
-#define del_XPVMG(p) del_body_type(p, SVt_PVMG)
+#define new_XPVMG() new_body_allocated(SVt_PVMG)
+#define del_XPVMG(p) del_body_allocated(p, SVt_PVMG)
-#define new_XPVGV() new_body_type(SVt_PVGV)
-#define del_XPVGV(p) del_body_type(p, SVt_PVGV)
+#define new_XPVGV() new_body_allocated(SVt_PVGV)
+#define del_XPVGV(p) del_body_allocated(p, SVt_PVGV)
#endif /* PURIFY */
HvSHAREKEYS_on(sv); /* key-sharing on by default */
#endif
HvMAX(sv) = 7; /* (start with 8 buckets) */
- if (old_type_details->body_size) {
- HvFILL(sv) = 0;
- } else {
- /* It will have been zeroed when the new body was allocated.
- Lets not write to it, in case it confuses a write-back
- cache. */
- }
}
/* SVt_NULL isn't the only thing upgraded to AV or HV.
if (SvROK(sv)) {
return_rok:
if (SvAMAGIC(sv)) {
- SV * const tmpstr=AMG_CALLun(sv,numer);
+ SV * tmpstr;
+ if (flags & SV_SKIP_OVERLOAD)
+ return 0;
+ tmpstr=AMG_CALLun(sv,numer);
if (tmpstr && (!SvROK(tmpstr) || (SvRV(tmpstr) != SvRV(sv)))) {
return SvIV(tmpstr);
}
if (SvROK(sv)) {
return_rok:
if (SvAMAGIC(sv)) {
- SV *const tmpstr = AMG_CALLun(sv,numer);
+ SV *tmpstr;
+ if (flags & SV_SKIP_OVERLOAD)
+ return 0;
+ tmpstr = AMG_CALLun(sv,numer);
if (tmpstr && (!SvROK(tmpstr) || (SvRV(tmpstr) != SvRV(sv)))) {
return SvUV(tmpstr);
}
}
/*
-=for apidoc sv_2nv
+=for apidoc sv_2nv_flags
Return the num value of an SV, doing any necessary string or integer
-conversion, magic etc. Normally used via the C<SvNV(sv)> and C<SvNVx(sv)>
-macros.
+conversion. If flags includes SV_GMAGIC, does an mg_get() first.
+Normally used via the C<SvNV(sv)> and C<SvNVx(sv)> macros.
=cut
*/
NV
-Perl_sv_2nv(pTHX_ register SV *const sv)
+Perl_sv_2nv_flags(pTHX_ register SV *const sv, const I32 flags)
{
dVAR;
if (!sv)
if (SvGMAGICAL(sv) || (SvTYPE(sv) == SVt_PVGV && SvVALID(sv))) {
/* FBMs use the same flag bit as SVf_IVisUV, so must let them
cache IVs just in case. */
- mg_get(sv);
+ if (flags & SV_GMAGIC)
+ mg_get(sv);
if (SvNOKp(sv))
return SvNVX(sv);
if ((SvPOKp(sv) && SvLEN(sv)) && !SvIOKp(sv)) {
if (SvROK(sv)) {
return_rok:
if (SvAMAGIC(sv)) {
- SV *const tmpstr = AMG_CALLun(sv,numer);
+ SV *tmpstr;
+ if (flags & SV_SKIP_OVERLOAD)
+ return 0;
+ tmpstr = AMG_CALLun(sv,numer);
if (tmpstr && (!SvROK(tmpstr) || (SvRV(tmpstr) != SvRV(sv)))) {
return SvNV(tmpstr);
}
if (SvROK(sv)) {
return_rok:
if (SvAMAGIC(sv)) {
- SV *const tmpstr = AMG_CALLun(sv,string);
+ SV *tmpstr;
+ if (flags & SV_SKIP_OVERLOAD)
+ return NULL;
+ tmpstr = AMG_CALLun(sv,string);
if (tmpstr && (!SvROK(tmpstr) || (SvRV(tmpstr) != SvRV(sv)))) {
/* Unwrap this: */
/* char *pv = lp ? SvPV(tmpstr, *lp) : SvPV_nolen(tmpstr);
sv_force_normal_flags(sv, 0);
}
if (SvREADONLY(sv)) {
- Perl_croak(aTHX_ "%s", PL_no_modify);
+ Perl_croak_no_modify(aTHX);
}
(void) sv_utf8_upgrade(sv);
SvUTF8_off(sv);
}
}
else if (IN_PERL_RUNTIME)
- Perl_croak(aTHX_ "%s", PL_no_modify);
+ Perl_croak_no_modify(aTHX);
}
#else
if (SvREADONLY(sv)) {
unshare_hek(SvSHARED_HEK_FROM_PV(pvx));
}
else if (IN_PERL_RUNTIME)
- Perl_croak(aTHX_ "%s", PL_no_modify);
+ Perl_croak_no_modify(aTHX);
}
#endif
if (SvROK(sv))
&& how != PERL_MAGIC_backref
)
{
- Perl_croak(aTHX_ "%s", PL_no_modify);
+ Perl_croak_no_modify(aTHX);
}
}
if (SvMAGICAL(sv) || (how == PERL_MAGIC_taint && SvTYPE(sv) >= SVt_PVMG)) {
=for apidoc sv_inc
Auto-increment of the value in the SV, doing string to numeric conversion
-if necessary. Handles 'get' magic.
+if necessary. Handles 'get' magic and operator overloading.
=cut
*/
void
Perl_sv_inc(pTHX_ register SV *const sv)
{
+ if (!sv)
+ return;
+ SvGETMAGIC(sv);
+ sv_inc_nomg(sv);
+}
+
+/*
+=for apidoc sv_inc_nomg
+
+Auto-increment of the value in the SV, doing string to numeric conversion
+if necessary. Handles operator overloading. Skips handling 'get' magic.
+
+=cut
+*/
+
+void
+Perl_sv_inc_nomg(pTHX_ register SV *const sv)
+{
dVAR;
register char *d;
int flags;
if (!sv)
return;
- SvGETMAGIC(sv);
if (SvTHINKFIRST(sv)) {
if (SvIsCOW(sv))
sv_force_normal_flags(sv, 0);
if (SvREADONLY(sv)) {
if (IN_PERL_RUNTIME)
- Perl_croak(aTHX_ "%s", PL_no_modify);
+ Perl_croak_no_modify(aTHX);
}
if (SvROK(sv)) {
IV i;
=for apidoc sv_dec
Auto-decrement of the value in the SV, doing string to numeric conversion
-if necessary. Handles 'get' magic.
+if necessary. Handles 'get' magic and operator overloading.
=cut
*/
Perl_sv_dec(pTHX_ register SV *const sv)
{
dVAR;
+ if (!sv)
+ return;
+ SvGETMAGIC(sv);
+ sv_dec_nomg(sv);
+}
+
+/*
+=for apidoc sv_dec_nomg
+
+Auto-decrement of the value in the SV, doing string to numeric conversion
+if necessary. Handles operator overloading. Skips handling 'get' magic.
+
+=cut
+*/
+
+void
+Perl_sv_dec_nomg(pTHX_ register SV *const sv)
+{
+ dVAR;
int flags;
if (!sv)
return;
- SvGETMAGIC(sv);
if (SvTHINKFIRST(sv)) {
if (SvIsCOW(sv))
sv_force_normal_flags(sv, 0);
if (SvREADONLY(sv)) {
if (IN_PERL_RUNTIME)
- Perl_croak(aTHX_ "%s", PL_no_modify);
+ Perl_croak_no_modify(aTHX);
}
if (SvROK(sv)) {
IV i;
if (SvIsCOW(tmpRef))
sv_force_normal_flags(tmpRef, 0);
if (SvREADONLY(tmpRef))
- Perl_croak(aTHX_ "%s", PL_no_modify);
+ Perl_croak_no_modify(aTHX);
if (SvOBJECT(tmpRef)) {
if (SvTYPE(tmpRef) != SVt_PVIO)
--PL_sv_objcount;
else if (svix < svmax) {
sv_catsv(sv, *svargs);
}
+ else
+ S_vcatpvfn_missing_argument(aTHX);
return;
}
if (args && patlen == 3 && pat[0] == '%' &&
pp = pat + 2;
while (*pp >= '0' && *pp <= '9')
digits = 10 * digits + (*pp++ - '0');
- if (pp - pat == (int)patlen - 1) {
- NV nv;
-
- if (svix < svmax)
- nv = SvNV(*svargs);
- else
- return;
+ if (pp - pat == (int)patlen - 1 && svix < svmax) {
+ const NV nv = SvNV(*svargs);
if (*pp == 'g') {
/* Add check for digits != 0 because it seems that some
gconverts are buggy in this case, and we don't yet have
that currently av_dup, gv_dup and hv_dup are the same as sv_dup.
If this changes, please unmerge ss_dup.
Likewise, sv_dup_inc_multiple() relies on this fact. */
-#define sv_dup_inc(s,t) SvREFCNT_inc(sv_dup(s,t))
-#define sv_dup_inc_NN(s,t) SvREFCNT_inc_NN(sv_dup(s,t))
+#define sv_dup_inc_NN(s,t) SvREFCNT_inc_NN(sv_dup_inc(s,t))
#define av_dup(s,t) MUTABLE_AV(sv_dup((const SV *)s,t))
-#define av_dup_inc(s,t) MUTABLE_AV(SvREFCNT_inc(sv_dup((const SV *)s,t)))
+#define av_dup_inc(s,t) MUTABLE_AV(sv_dup_inc((const SV *)s,t))
#define hv_dup(s,t) MUTABLE_HV(sv_dup((const SV *)s,t))
-#define hv_dup_inc(s,t) MUTABLE_HV(SvREFCNT_inc(sv_dup((const SV *)s,t)))
+#define hv_dup_inc(s,t) MUTABLE_HV(sv_dup_inc((const SV *)s,t))
#define cv_dup(s,t) MUTABLE_CV(sv_dup((const SV *)s,t))
-#define cv_dup_inc(s,t) MUTABLE_CV(SvREFCNT_inc(sv_dup((const SV *)s,t)))
+#define cv_dup_inc(s,t) MUTABLE_CV(sv_dup_inc((const SV *)s,t))
#define io_dup(s,t) MUTABLE_IO(sv_dup((const SV *)s,t))
-#define io_dup_inc(s,t) MUTABLE_IO(SvREFCNT_inc(sv_dup((const SV *)s,t)))
+#define io_dup_inc(s,t) MUTABLE_IO(sv_dup_inc((const SV *)s,t))
#define gv_dup(s,t) MUTABLE_GV(sv_dup((const SV *)s,t))
-#define gv_dup_inc(s,t) MUTABLE_GV(SvREFCNT_inc(sv_dup((const SV *)s,t)))
+#define gv_dup_inc(s,t) MUTABLE_GV(sv_dup_inc((const SV *)s,t))
#define SAVEPV(p) ((p) ? savepv(p) : NULL)
#define SAVEPVN(p,n) ((p) ? savepvn(p,n) : NULL)
tbl->tbl_max = --newsize;
tbl->tbl_ary = ary;
for (i=0; i < oldsize; i++, ary++) {
- PTR_TBL_ENT_t **curentp, **entp, *ent;
- if (!*ary)
+ PTR_TBL_ENT_t **entp = ary;
+ PTR_TBL_ENT_t *ent = *ary;
+ PTR_TBL_ENT_t **curentp;
+ if (!ent)
continue;
curentp = ary + oldsize;
- for (entp = ary, ent = *ary; ent; ent = *entp) {
+ do {
if ((newsize & PTR_TABLE_HASH(ent->oldval)) != i) {
*entp = ent->next;
ent->next = *curentp;
*curentp = ent;
- continue;
}
else
entp = &ent->next;
- }
+ ent = *entp;
+ } while (ent);
}
}
/* duplicate an SV of any type (including AV, HV etc) */
-SV *
-Perl_sv_dup(pTHX_ const SV *const sstr, CLONE_PARAMS *const param)
+static SV *
+S_sv_dup_common(pTHX_ const SV *const sstr, CLONE_PARAMS *const param)
{
dVAR;
SV *dstr;
- PERL_ARGS_ASSERT_SV_DUP;
+ PERL_ARGS_ASSERT_SV_DUP_COMMON;
- if (!sstr)
- return NULL;
if (SvTYPE(sstr) == SVTYPEMASK) {
#ifdef DEBUG_LEAKING_SCALARS_ABORT
abort();
else {
while (items-- > 0)
*dst_ary++ = sv_dup(*src_ary++, param);
- if (!(param->flags & CLONEf_COPY_STACKS)
- && AvREIFY(sstr))
- {
- av_reify(MUTABLE_AV(dstr)); /* #41138 */
- }
}
items = AvMAX((const AV *)sstr) - AvFILLp((const AV *)sstr);
while (items-- > 0) {
* duped GV may never be freed. A bit of a hack! DAPM */
CvGV(dstr) = (param->flags & CLONEf_JOIN_IN) ?
NULL : gv_dup(CvGV(dstr), param) ;
- PAD_DUP(CvPADLIST(dstr), CvPADLIST(sstr), param);
+ CvPADLIST(dstr) = padlist_dup(CvPADLIST(sstr), param);
CvOUTSIDE(dstr) =
CvWEAKOUTSIDE(sstr)
? cv_dup( CvOUTSIDE(dstr), param)
return dstr;
}
+SV *
+Perl_sv_dup_inc(pTHX_ const SV *const sstr, CLONE_PARAMS *const param)
+{
+ PERL_ARGS_ASSERT_SV_DUP_INC;
+ return sstr ? SvREFCNT_inc(sv_dup_common(sstr, param)) : NULL;
+}
+
+SV *
+Perl_sv_dup(pTHX_ const SV *const sstr, CLONE_PARAMS *const param)
+{
+ SV *dstr = sstr ? sv_dup_common(sstr, param) : NULL;
+ PERL_ARGS_ASSERT_SV_DUP;
+
+ /* Track every SV that (at least initially) had a reference count of 0.
+ We need to do this by holding an actual reference to it in this array.
+ If we attempt to cheat, turn AvREAL_off(), and store only pointers
+ (akin to the stashes hash, and the perl stack), we come unstuck if
+ a weak reference (or other SV legitimately SvREFCNT() == 0 for this
+ thread) is manipulated in a CLONE method, because CLONE runs before the
+ unreferenced array is walked to find SVs still with SvREFCNT() == 0
+ (and fix things up by giving each a reference via the temps stack).
+ Instead, during CLONE, if the 0-referenced SV has SvREFCNT_inc() and
+ then SvREFCNT_dec(), it will be cleaned up (and added to the free list)
+ before the walk of unreferenced happens and a reference to that is SV
+ added to the temps stack. At which point we have the same SV considered
+ to be in use, and free to be re-used. Not good.
+ */
+ if (dstr && !(param->flags & CLONEf_COPY_STACKS) && !SvREFCNT(dstr)) {
+ assert(param->unreferenced);
+ av_push(param->unreferenced, SvREFCNT_inc(dstr));
+ }
+
+ return dstr;
+}
+
/* duplicate a context */
PERL_CONTEXT *
ptr = POPPTR(ss,ix);
TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
/* Fall through */
+ case SAVEt_INT_SMALL:
+ case SAVEt_I32_SMALL:
case SAVEt_I16: /* I16 reference */
case SAVEt_I8: /* I8 reference */
case SAVEt_BOOL:
#endif /* PERL_IMPLICIT_SYS */
param->flags = flags;
+ /* Nothing in the core code uses this, but we make it available to
+ extensions (using mg_dup). */
param->proto_perl = proto_perl;
+ /* Likely nothing will use this, but it is initialised to be consistent
+ with Perl_clone_params_new(). */
+ param->proto_perl = my_perl;
+ param->unreferenced = NULL;
INIT_TRACK_MEMPOOL(my_perl->Imemory_debug_header, my_perl);
PL_origargv = proto_perl->Iorigargv;
param->stashes = newAV(); /* Setup array of objects to call clone on */
+ /* This makes no difference to the implementation, as it always pushes
+ and shifts pointers to other SVs without changing their reference
+ count, with the array becoming empty before it is freed. However, it
+ makes it conceptually clear what is going on, and will avoid some
+ work inside av.c, filling slots between AvFILL() and AvMAX() with
+ &PL_sv_undef, and SvREFCNT_dec()ing those. */
+ AvREAL_off(param->stashes);
+
+ if (!(flags & CLONEf_COPY_STACKS)) {
+ param->unreferenced = newAV();
+ }
/* Set tainting stuff before PerlIO_debug can possibly get called */
PL_tainting = proto_perl->Itainting;
PL_unlockhook = proto_perl->Iunlockhook;
PL_threadhook = proto_perl->Ithreadhook;
PL_destroyhook = proto_perl->Idestroyhook;
+ PL_signalhook = proto_perl->Isignalhook;
#ifdef THREADS_HAVE_PIDS
PL_ppid = proto_perl->Ippid;
else {
init_stacks();
ENTER; /* perl_destruct() wants to LEAVE; */
-
- /* although we're not duplicating the tmps stack, we should still
- * add entries for any SVs on the tmps stack that got cloned by a
- * non-refcount means (eg a temp in @_); otherwise they will be
- * orphaned
- */
- for (i = 0; i<= proto_perl->Itmps_ix; i++) {
- SV * const nsv = MUTABLE_SV(ptr_table_fetch(PL_ptr_table,
- proto_perl->Itmps_stack[i]));
- if (nsv && !SvREFCNT(nsv)) {
- PUSH_EXTEND_MORTAL__SV_C(SvREFCNT_inc_simple(nsv));
- }
- }
}
PL_start_env = proto_perl->Istart_env; /* XXXXXX */
PL_ptr_table = NULL;
}
+ if (!(flags & CLONEf_COPY_STACKS)) {
+ unreferenced_to_tmp_stack(param->unreferenced);
+ }
SvREFCNT_dec(param->stashes);
return my_perl;
}
+static void
+S_unreferenced_to_tmp_stack(pTHX_ AV *const unreferenced)
+{
+ PERL_ARGS_ASSERT_UNREFERENCED_TO_TMP_STACK;
+
+ if (AvFILLp(unreferenced) > -1) {
+ SV **svp = AvARRAY(unreferenced);
+ SV **const last = svp + AvFILLp(unreferenced);
+ SSize_t count = 0;
+
+ do {
+ if (SvREFCNT(*svp) == 1)
+ ++count;
+ } while (++svp <= last);
+
+ EXTEND_MORTAL(count);
+ svp = AvARRAY(unreferenced);
+
+ do {
+ if (SvREFCNT(*svp) == 1) {
+ /* Our reference is the only one to this SV. This means that
+ in this thread, the scalar effectively has a 0 reference.
+ That doesn't work (cleanup never happens), so donate our
+ reference to it onto the save stack. */
+ PL_tmps_stack[++PL_tmps_ix] = *svp;
+ } else {
+ /* As an optimisation, because we are already walking the
+ entire array, instead of above doing either
+ SvREFCNT_inc(*svp) or *svp = &PL_sv_undef, we can instead
+ release our reference to the scalar, so that at the end of
+ the array owns zero references to the scalars it happens to
+ point to. We are effectively converting the array from
+ AvREAL() on to AvREAL() off. This saves the av_clear()
+ (triggered by the SvREFCNT_dec(unreferenced) below) from
+ walking the array a second time. */
+ SvREFCNT_dec(*svp);
+ }
+
+ } while (++svp <= last);
+ AvREAL_off(unreferenced);
+ }
+ SvREFCNT_dec(unreferenced);
+}
+
+void
+Perl_clone_params_del(CLONE_PARAMS *param)
+{
+ PerlInterpreter *const was = PERL_GET_THX;
+ PerlInterpreter *const to = param->new_perl;
+ dTHXa(to);
+
+ PERL_ARGS_ASSERT_CLONE_PARAMS_DEL;
+
+ if (was != to) {
+ PERL_SET_THX(to);
+ }
+
+ SvREFCNT_dec(param->stashes);
+ if (param->unreferenced)
+ unreferenced_to_tmp_stack(param->unreferenced);
+
+ Safefree(param);
+
+ if (was != to) {
+ PERL_SET_THX(was);
+ }
+}
+
+CLONE_PARAMS *
+Perl_clone_params_new(PerlInterpreter *const from, PerlInterpreter *const to)
+{
+ /* Need to play this game, as newAV() can call safesysmalloc(), and that
+ does a dTHX; to get the context from thread local storage.
+ FIXME - under PERL_CORE Newx(), Safefree() and friends should expand to
+ a version that passes in my_perl. */
+ PerlInterpreter *const was = PERL_GET_THX;
+ CLONE_PARAMS *param;
+
+ PERL_ARGS_ASSERT_CLONE_PARAMS_NEW;
+
+ if (was != to) {
+ PERL_SET_THX(to);
+ }
+
+ /* Given that we've set the context, we can do this unshared. */
+ Newx(param, 1, CLONE_PARAMS);
+
+ param->flags = 0;
+ param->proto_perl = from;
+ param->new_perl = to;
+ param->stashes = (AV *)Perl_newSV_type(to, SVt_PVAV);
+ AvREAL_off(param->stashes);
+ param->unreferenced = (AV *)Perl_newSV_type(to, SVt_PVAV);
+
+ if (was != to) {
+ PERL_SET_THX(was);
+ }
+ return param;
+}
+
#endif /* USE_ITHREADS */
/*
https://perl5.git.perl.org / perl5.git / blobdiff