/*
=head1 Pad Data Structures
-This file contains the functions that create and manipulate scratchpads,
-which are array-of-array data structures attached to a CV (ie a sub)
-and which store lexical variables and opcode temporary and per-thread
-values.
+=for apidoc Amx|PADLIST *|CvPADLIST|CV *cv
-=for apidoc m|AV *|CvPADLIST|CV *cv
-CV's can have CvPADLIST(cv) set to point to an AV.
+CV's can have CvPADLIST(cv) set to point to a PADLIST. This is the CV's
+scratchpad, which stores lexical variables and opcode temporary and
+per-thread values.
-For these purposes "forms" are a kind-of CV, eval""s are too (except they're
+For these purposes "formats" are a kind-of CV; eval""s are too (except they're
not callable at will and are always thrown away after the eval"" is done
-executing). Require'd files are simply evals without any outer lexical
+executing). Require'd files are simply evals without any outer lexical
scope.
XSUBs don't have CvPADLIST set - dXSTARG fetches values from PL_curpad,
but that is really the callers pad (a slot of which is allocated by
every entersub).
-The CvPADLIST AV has does not have AvREAL set, so REFCNT of component items
-is managed "manual" (mostly in pad.c) rather than normal av.c rules.
-The items in the AV are not SVs as for a normal AV, but other AVs:
+The PADLIST has a C array where pads are stored.
-0'th Entry of the CvPADLIST is an AV which represents the "names" or rather
-the "static type information" for lexicals.
+The 0th entry of the PADLIST is a PADNAMELIST (which is actually just an
+AV, but that may change) which represents the "names" or rather
+the "static type information" for lexicals. The individual elements of a
+PADNAMELIST are PADNAMEs (just SVs; but, again, that may change). Future
+refactorings might stop the PADNAMELIST from being stored in the PADLIST's
+array, so don't rely on it. See L</PadlistNAMES>.
-The CvDEPTH'th entry of CvPADLIST AV is an AV which is the stack frame at that
-depth of recursion into the CV.
-The 0'th slot of a frame AV is an AV which is @_.
-other entries are storage for variables and op targets.
+The CvDEPTH'th entry of a PADLIST is a PAD (an AV) which is the stack frame
+at that depth of recursion into the CV. The 0th slot of a frame AV is an
+AV which is @_. Other entries are storage for variables and op targets.
-During compilation:
-C<PL_comppad_name> is set to the names AV.
-C<PL_comppad> is set to the frame AV for the frame CvDEPTH == 1.
-C<PL_curpad> is set to the body of the frame AV (i.e. AvARRAY(PL_comppad)).
-
-During execution, C<PL_comppad> and C<PL_curpad> refer to the live
-frame of the currently executing sub.
-
-Iterating over the names AV iterates over all possible pad
-items. Pad slots that are SVs_PADTMP (targets/GVs/constants) end up having
+Iterating over the PADNAMELIST iterates over all possible pad
+items. Pad slots that are SVs_PADTMP (targets/GVs/constants) end up having
&PL_sv_undef "names" (see pad_alloc()).
-Only my/our variable (SVs_PADMY/SVs_PADOUR) slots get valid names.
+Only my/our variable (SvPADMY/PADNAME_isOUR) slots get valid names.
The rest are op targets/GVs/constants which are statically allocated
or resolved at compile time. These don't have names by which they
-can be looked up from Perl code at run time through eval"" like
+can be looked up from Perl code at run time through eval"" the way
my/our variables can be. Since they can't be looked up by "name"
but only by their index allocated at compile time (which is usually
in PL_op->op_targ), wasting a name SV for them doesn't make sense.
The SVs in the names AV have their PV being the name of the variable.
xlow+1..xhigh inclusive in the NV union is a range of cop_seq numbers for
-which the name is valid. For typed lexicals name SV is SVt_PVMG and SvSTASH
+which the name is valid (accessed through the macros COP_SEQ_RANGE_LOW and
+_HIGH). During compilation, these fields may hold the special value
+PERL_PADSEQ_INTRO to indicate various stages:
+
+ COP_SEQ_RANGE_LOW _HIGH
+ ----------------- -----
+ PERL_PADSEQ_INTRO 0 variable not yet introduced: { my ($x
+ valid-seq# PERL_PADSEQ_INTRO variable in scope: { my ($x)
+ valid-seq# valid-seq# compilation of scope complete: { my ($x) }
+
+For typed lexicals name SV is SVt_PVMG and SvSTASH
points at the type. For C<our> lexicals, the type is also SVt_PVMG, with the
SvOURSTASH slot pointing at the stash of the associated global (so that
duplicate C<our> declarations in the same package can be detected). SvUVX is
sometimes hijacked to store the generation number during compilation.
-If SvFAKE is set on the name SV, then that slot in the frame AV is
+If PADNAME_OUTER (SvFAKE) is set on the
+name SV, then that slot in the frame AV is
a REFCNT'ed reference to a lexical from "outside". In this case,
the name SV does not use xlow and xhigh to store a cop_seq range, since it is
in scope throughout. Instead xhigh stores some flags containing info about
within the parent's pad where the lexical's value is stored, to make
cloning quicker.
-If the 'name' is '&' the corresponding entry in frame AV
+If the 'name' is '&' the corresponding entry in the PAD
is a CV representing a possible closure.
-(SvFAKE and name of '&' is not a meaningful combination currently but could
+(PADNAME_OUTER and name of '&' is not a
+meaningful combination currently but could
become so if C<my sub foo {}> is implemented.)
Note that formats are treated as anon subs, and are cloned each time
write is called (if necessary).
The flag SVs_PADSTALE is cleared on lexicals each time the my() is executed,
-and set on scope exit. This allows the 'Variable $x is not available' warning
+and set on scope exit. This allows the
+'Variable $x is not available' warning
to be generated in evals, such as
{ my $x = 1; sub f { eval '$x'} } f();
-For state vars, SVs_PADSTALE is overloaded to mean 'not yet initialised'
+For state vars, SVs_PADSTALE is overloaded to mean 'not yet initialised'.
+
+=for apidoc AmxU|PADNAMELIST *|PL_comppad_name
+
+During compilation, this points to the array containing the names part
+of the pad for the currently-compiling code.
+
+=for apidoc AmxU|PAD *|PL_comppad
+
+During compilation, this points to the array containing the values
+part of the pad for the currently-compiling code. (At runtime a CV may
+have many such value arrays; at compile time just one is constructed.)
+At runtime, this points to the array containing the currently-relevant
+values for the pad for the currently-executing code.
+
+=for apidoc AmxU|SV **|PL_curpad
+
+Points directly to the body of the L</PL_comppad> array.
+(I.e., this is C<PAD_ARRAY(PL_comppad)>.)
=cut
*/
#define PARENT_FAKELEX_FLAGS_set(sv,val) \
STMT_START { ((XPVNV*)SvANY(sv))->xnv_u.xpad_cop_seq.xhigh = (val); } STMT_END
-#define PAD_MAX I32_MAX
+/*
+=for apidoc mx|void|pad_peg|const char *s
+
+When PERL_MAD is enabled, this is a small no-op function that gets called
+at the start of each pad-related function. It can be breakpointed to
+track all pad operations. The parameter is a string indicating the type
+of pad operation being performed.
+
+=cut
+*/
#ifdef PERL_MAD
void pad_peg(const char* s) {
- static int pegcnt;
+ static int pegcnt; /* XXX not threadsafe */
+ PERL_UNUSED_ARG(s);
PERL_ARGS_ASSERT_PAD_PEG;
#endif
/*
-=for apidoc pad_new
+This is basically sv_eq_flags() in sv.c, but we avoid the magic
+and bytes checking.
+*/
-Create a new compiling padlist, saving and updating the various global
-vars at the same time as creating the pad itself. The following flags
-can be OR'ed together:
+static bool
+sv_eq_pvn_flags(pTHX_ const SV *sv, const char* pv, const STRLEN pvlen, const U32 flags) {
+ if ( (SvUTF8(sv) & SVf_UTF8 ) != (flags & SVf_UTF8) ) {
+ const char *pv1 = SvPVX_const(sv);
+ STRLEN cur1 = SvCUR(sv);
+ const char *pv2 = pv;
+ STRLEN cur2 = pvlen;
+ if (PL_encoding) {
+ SV* svrecode = NULL;
+ if (SvUTF8(sv)) {
+ svrecode = newSVpvn(pv2, cur2);
+ sv_recode_to_utf8(svrecode, PL_encoding);
+ pv2 = SvPV_const(svrecode, cur2);
+ }
+ else {
+ svrecode = newSVpvn(pv1, cur1);
+ sv_recode_to_utf8(svrecode, PL_encoding);
+ pv1 = SvPV_const(svrecode, cur1);
+ }
+ SvREFCNT_dec(svrecode);
+ }
+ if (flags & SVf_UTF8)
+ return (bytes_cmp_utf8(
+ (const U8*)pv1, cur1,
+ (const U8*)pv2, cur2) == 0);
+ else
+ return (bytes_cmp_utf8(
+ (const U8*)pv2, cur2,
+ (const U8*)pv1, cur1) == 0);
+ }
+ else
+ return ((SvPVX_const(sv) == pv)
+ || memEQ(SvPVX_const(sv), pv, pvlen));
+}
+
+
+/*
+=for apidoc Am|PADLIST *|pad_new|int flags
+
+Create a new padlist, updating the global variables for the
+currently-compiling padlist to point to the new padlist. The following
+flags can be OR'ed together:
padnew_CLONE this pad is for a cloned CV
- padnew_SAVE save old globals
+ padnew_SAVE save old globals on the save stack
padnew_SAVESUB also save extra stuff for start of sub
=cut
Perl_pad_new(pTHX_ int flags)
{
dVAR;
- AV *padlist, *padname, *pad;
+ PADLIST *padlist;
+ PAD *padname, *pad;
+ PAD **ary;
ASSERT_CURPAD_LEGAL("pad_new");
if (flags & padnew_SAVE) {
SAVECOMPPAD();
- SAVESPTR(PL_comppad_name);
if (! (flags & padnew_CLONE)) {
+ SAVESPTR(PL_comppad_name);
SAVEI32(PL_padix);
SAVEI32(PL_comppad_name_fill);
SAVEI32(PL_min_intro_pending);
/* ... create new pad ... */
- padlist = newAV();
- padname = newAV();
+ Newxz(padlist, 1, PADLIST);
pad = newAV();
if (flags & padnew_CLONE) {
*/
AV * const a0 = newAV(); /* will be @_ */
- av_extend(a0, 0);
av_store(pad, 0, MUTABLE_SV(a0));
AvREIFY_only(a0);
+
+ padname = (PAD *)SvREFCNT_inc_simple_NN(PL_comppad_name);
}
else {
+ padlist->xpadl_id = PL_padlist_generation++;
av_store(pad, 0, NULL);
+ padname = newAV();
}
- AvREAL_off(padlist);
- av_store(padlist, 0, MUTABLE_SV(padname));
- av_store(padlist, 1, MUTABLE_SV(pad));
+ /* Most subroutines never recurse, hence only need 2 entries in the padlist
+ array - names, and depth=1. The default for av_store() is to allocate
+ 0..3, and even an explicit call to av_extend() with <3 will be rounded
+ up, so we inline the allocation of the array here. */
+ Newx(ary, 2, PAD *);
+ PadlistMAX(padlist) = 1;
+ PadlistARRAY(padlist) = ary;
+ ary[0] = padname;
+ ary[1] = pad;
/* ... then update state variables */
- PL_comppad_name = MUTABLE_AV((*av_fetch(padlist, 0, FALSE)));
- PL_comppad = MUTABLE_AV((*av_fetch(padlist, 1, FALSE)));
- PL_curpad = AvARRAY(PL_comppad);
+ PL_comppad = pad;
+ PL_curpad = AvARRAY(pad);
if (! (flags & padnew_CLONE)) {
+ PL_comppad_name = padname;
PL_comppad_name_fill = 0;
PL_min_intro_pending = 0;
PL_padix = 0;
return (PADLIST*)padlist;
}
+
/*
-=for apidoc pad_undef
+=head1 Embedding Functions
-Free the padlist associated with a CV.
-If parts of it happen to be current, we null the relevant
-PL_*pad* global vars so that we don't have any dangling references left.
-We also repoint the CvOUTSIDE of any about-to-be-orphaned
-inner subs to the outer of this cv.
+=for apidoc cv_undef
-(This function should really be called pad_free, but the name was already
-taken)
+Clear out all the active components of a CV. This can happen either
+by an explicit C<undef &foo>, or by the reference count going to zero.
+In the former case, we keep the CvOUTSIDE pointer, so that any anonymous
+children can still follow the full lexical scope chain.
=cut
*/
void
-Perl_pad_undef(pTHX_ CV* cv)
+Perl_cv_undef(pTHX_ CV *cv)
{
dVAR;
- I32 ix;
- const PADLIST * const padlist = CvPADLIST(cv);
+ const PADLIST *padlist = CvPADLIST(cv);
+ bool const slabbed = !!CvSLABBED(cv);
- PERL_ARGS_ASSERT_PAD_UNDEF;
-
- pad_peg("pad_undef");
- if (!padlist)
- return;
- if (SvIS_FREED(padlist)) /* may be during global destruction */
- return;
+ PERL_ARGS_ASSERT_CV_UNDEF;
DEBUG_X(PerlIO_printf(Perl_debug_log,
- "Pad undef: cv=0x%"UVxf" padlist=0x%"UVxf" comppad=0x%"UVxf"\n",
- PTR2UV(cv), PTR2UV(padlist), PTR2UV(PL_comppad))
+ "CV undef: cv=0x%"UVxf" comppad=0x%"UVxf"\n",
+ PTR2UV(cv), PTR2UV(PL_comppad))
);
- /* detach any '&' anon children in the pad; if afterwards they
- * are still live, fix up their CvOUTSIDEs to point to our outside,
- * bypassing us. */
- /* XXX DAPM for efficiency, we should only do this if we know we have
- * children, or integrate this loop with general cleanup */
-
- if (!PL_dirty) { /* don't bother during global destruction */
- CV * const outercv = CvOUTSIDE(cv);
- const U32 seq = CvOUTSIDE_SEQ(cv);
- AV * const comppad_name = MUTABLE_AV(AvARRAY(padlist)[0]);
- SV ** const namepad = AvARRAY(comppad_name);
- AV * const comppad = MUTABLE_AV(AvARRAY(padlist)[1]);
- SV ** const curpad = AvARRAY(comppad);
- for (ix = AvFILLp(comppad_name); ix > 0; ix--) {
- SV * const namesv = namepad[ix];
- if (namesv && namesv != &PL_sv_undef
- && *SvPVX_const(namesv) == '&')
- {
- CV * const innercv = MUTABLE_CV(curpad[ix]);
- U32 inner_rc = SvREFCNT(innercv);
- assert(inner_rc);
- namepad[ix] = NULL;
- SvREFCNT_dec(namesv);
-
- if (SvREFCNT(comppad) < 2) { /* allow for /(?{ sub{} })/ */
- curpad[ix] = NULL;
- SvREFCNT_dec(innercv);
- inner_rc--;
- }
+ if (CvFILE(cv) && CvDYNFILE(cv)) {
+ Safefree(CvFILE(cv));
+ }
+ CvFILE(cv) = NULL;
- /* in use, not just a prototype */
- if (inner_rc && (CvOUTSIDE(innercv) == cv)) {
- assert(CvWEAKOUTSIDE(innercv));
- /* don't relink to grandfather if he's being freed */
- if (outercv && SvREFCNT(outercv)) {
- CvWEAKOUTSIDE_off(innercv);
- CvOUTSIDE(innercv) = outercv;
- CvOUTSIDE_SEQ(innercv) = seq;
- SvREFCNT_inc_simple_void_NN(outercv);
- }
- else {
- CvOUTSIDE(innercv) = 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 */
+ opslab_force_free((OPSLAB *)CvSTART(cv));
+ CvSTART(cv) = NULL;
+
+ LEAVE;
+ }
+#ifdef DEBUGGING
+ else if (slabbed) Perl_warn(aTHX_ "Slab leaked from cv %p", cv);
+#endif
+ SvPOK_off(MUTABLE_SV(cv)); /* forget prototype */
+ sv_unmagic((SV *)cv, PERL_MAGIC_checkcall);
+ if (CvNAMED(cv)) unshare_hek(CvNAME_HEK(cv));
+ else CvGV_set(cv, NULL);
+
+ /* This statement and the subsequence if block was pad_undef(). */
+ pad_peg("pad_undef");
+
+ if (padlist) {
+ I32 ix;
+
+ /* Free the padlist associated with a CV.
+ If parts of it happen to be current, we null the relevant PL_*pad*
+ global vars so that we don't have any dangling references left.
+ We also repoint the CvOUTSIDE of any about-to-be-orphaned inner
+ subs to the outer of this cv. */
+
+ DEBUG_X(PerlIO_printf(Perl_debug_log,
+ "Pad undef: cv=0x%"UVxf" padlist=0x%"UVxf" comppad=0x%"UVxf"\n",
+ PTR2UV(cv), PTR2UV(padlist), PTR2UV(PL_comppad))
+ );
+
+ /* detach any '&' anon children in the pad; if afterwards they
+ * are still live, fix up their CvOUTSIDEs to point to our outside,
+ * bypassing us. */
+ /* XXX DAPM for efficiency, we should only do this if we know we have
+ * 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);
+ PAD * const comppad_name = PadlistARRAY(padlist)[0];
+ SV ** const namepad = AvARRAY(comppad_name);
+ PAD * const comppad = PadlistARRAY(padlist)[1];
+ SV ** const curpad = AvARRAY(comppad);
+ for (ix = AvFILLp(comppad_name); ix > 0; ix--) {
+ SV * const namesv = namepad[ix];
+ if (namesv && namesv != &PL_sv_undef
+ && *SvPVX_const(namesv) == '&')
+ {
+ CV * const innercv = MUTABLE_CV(curpad[ix]);
+ U32 inner_rc = SvREFCNT(innercv);
+ assert(inner_rc);
+ assert(SvTYPE(innercv) != SVt_PVFM);
+
+ if (SvREFCNT(comppad) < 2) { /* allow for /(?{ sub{} })/ */
+ curpad[ix] = NULL;
+ SvREFCNT_dec(innercv);
+ inner_rc--;
+ }
+
+ /* in use, not just a prototype */
+ if (inner_rc && (CvOUTSIDE(innercv) == cv)) {
+ assert(CvWEAKOUTSIDE(innercv));
+ /* don't relink to grandfather if he's being freed */
+ if (outercv && SvREFCNT(outercv)) {
+ CvWEAKOUTSIDE_off(innercv);
+ CvOUTSIDE(innercv) = outercv;
+ CvOUTSIDE_SEQ(innercv) = seq;
+ SvREFCNT_inc_simple_void_NN(outercv);
+ }
+ else {
+ CvOUTSIDE(innercv) = NULL;
+ }
+ }
}
- }
}
}
- }
- ix = AvFILLp(padlist);
- while (ix >= 0) {
- SV* const sv = AvARRAY(padlist)[ix--];
- if (sv) {
- if (sv == (const SV *)PL_comppad_name)
- PL_comppad_name = NULL;
- else if (sv == (const SV *)PL_comppad) {
- PL_comppad = NULL;
- PL_curpad = NULL;
+ ix = PadlistMAX(padlist);
+ while (ix > 0) {
+ PAD * const sv = PadlistARRAY(padlist)[ix--];
+ if (sv) {
+ if (sv == PL_comppad) {
+ PL_comppad = NULL;
+ PL_curpad = NULL;
+ }
+ SvREFCNT_dec(sv);
}
}
- SvREFCNT_dec(sv);
+ {
+ PAD * const sv = PadlistARRAY(padlist)[0];
+ if (sv == PL_comppad_name && SvREFCNT(sv) == 1)
+ PL_comppad_name = NULL;
+ SvREFCNT_dec(sv);
+ }
+ if (PadlistARRAY(padlist)) Safefree(PadlistARRAY(padlist));
+ Safefree(padlist);
+ CvPADLIST(cv) = NULL;
+ }
+
+
+ /* 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);
}
- SvREFCNT_dec(MUTABLE_SV(CvPADLIST(cv)));
- CvPADLIST(cv) = NULL;
+ if (CvISXSUB(cv) && CvXSUB(cv)) {
+ CvXSUB(cv) = NULL;
+ }
+ /* delete all flags except WEAKOUTSIDE and CVGV_RC, which indicate the
+ * ref status of CvOUTSIDE and CvGV, and ANON, which pp_entersub uses
+ * to choose an error message */
+ CvFLAGS(cv) &= (CVf_WEAKOUTSIDE|CVf_CVGV_RC|CVf_ANON);
}
+/*
+=for apidoc cv_forget_slab
+
+When a CV has a reference count on its slab (CvSLABBED), it is responsible
+for making sure it is freed. (Hence, no two CVs should ever have a
+reference count on the same slab.) The CV only needs to reference the slab
+during compilation. Once it is compiled and CvROOT attached, it has
+finished its job, so it can forget the slab.
+
+=cut
+*/
+
+void
+Perl_cv_forget_slab(pTHX_ CV *cv)
+{
+ const bool slabbed = !!CvSLABBED(cv);
+ OPSLAB *slab = NULL;
+
+ PERL_ARGS_ASSERT_CV_FORGET_SLAB;
+ if (!slabbed) return;
+ CvSLABBED_off(cv);
+
+ if (CvROOT(cv)) slab = OpSLAB(CvROOT(cv));
+ else if (CvSTART(cv)) slab = (OPSLAB *)CvSTART(cv);
+#ifdef DEBUGGING
+ else if (slabbed) Perl_warn(aTHX_ "Slab leaked from cv %p", cv);
+#endif
+
+ if (slab) {
+#ifdef PERL_DEBUG_READONLY_OPS
+ const size_t refcnt = slab->opslab_refcnt;
+#endif
+ OpslabREFCNT_dec(slab);
+#ifdef PERL_DEBUG_READONLY_OPS
+ if (refcnt > 1) Slab_to_ro(slab);
+#endif
+ }
+}
+
+/*
+=for apidoc m|PADOFFSET|pad_alloc_name|SV *namesv|U32 flags|HV *typestash|HV *ourstash
+
+Allocates a place in the currently-compiling
+pad (via L<perlapi/pad_alloc>) and
+then stores a name for that entry. I<namesv> is adopted and becomes the
+name entry; it must already contain the name string and be sufficiently
+upgraded. I<typestash> and I<ourstash> and the C<padadd_STATE> flag get
+added to I<namesv>. None of the other
+processing of L<perlapi/pad_add_name_pvn>
+is done. Returns the offset of the allocated pad slot.
+
+=cut
+*/
static PADOFFSET
-S_pad_add_name_sv(pTHX_ SV *namesv, const U32 flags, HV *typestash,
- HV *ourstash)
+S_pad_alloc_name(pTHX_ SV *namesv, U32 flags, HV *typestash, HV *ourstash)
{
dVAR;
const PADOFFSET offset = pad_alloc(OP_PADSV, SVs_PADMY);
- PERL_ARGS_ASSERT_PAD_ADD_NAME_SV;
+ PERL_ARGS_ASSERT_PAD_ALLOC_NAME;
- ASSERT_CURPAD_ACTIVE("pad_add_name");
+ ASSERT_CURPAD_ACTIVE("pad_alloc_name");
if (typestash) {
assert(SvTYPE(namesv) == SVt_PVMG);
}
/*
-=for apidoc pad_add_name
+=for apidoc Am|PADOFFSET|pad_add_name_pvn|const char *namepv|STRLEN namelen|U32 flags|HV *typestash|HV *ourstash
+
+Allocates a place in the currently-compiling pad for a named lexical
+variable. Stores the name and other metadata in the name part of the
+pad, and makes preparations to manage the variable's lexical scoping.
+Returns the offset of the allocated pad slot.
-Create a new name and associated PADMY SV in the current pad; return the
-offset.
-If C<typestash> is valid, the name is for a typed lexical; set the
-name's stash to that value.
-If C<ourstash> is valid, it's an our lexical, set the name's
-SvOURSTASH to that value
+I<namepv>/I<namelen> specify the variable's name, including leading sigil.
+If I<typestash> is non-null, the name is for a typed lexical, and this
+identifies the type. If I<ourstash> is non-null, it's a lexical reference
+to a package variable, and this identifies the package. The following
+flags can be OR'ed together:
-If fake, it means we're cloning an existing entry
+ padadd_OUR redundantly specifies if it's a package var
+ padadd_STATE variable will retain value persistently
+ padadd_NO_DUP_CHECK skip check for lexical shadowing
=cut
*/
PADOFFSET
-Perl_pad_add_name(pTHX_ const char *name, const STRLEN len, const U32 flags,
- HV *typestash, HV *ourstash)
+Perl_pad_add_name_pvn(pTHX_ const char *namepv, STRLEN namelen,
+ U32 flags, HV *typestash, HV *ourstash)
{
dVAR;
PADOFFSET offset;
SV *namesv;
+ bool is_utf8;
- PERL_ARGS_ASSERT_PAD_ADD_NAME;
+ PERL_ARGS_ASSERT_PAD_ADD_NAME_PVN;
- if (flags & ~(padadd_OUR|padadd_STATE|padadd_NO_DUP_CHECK))
- Perl_croak(aTHX_ "panic: pad_add_name illegal flag bits 0x%" UVxf,
+ if (flags & ~(padadd_OUR|padadd_STATE|padadd_NO_DUP_CHECK|padadd_UTF8_NAME))
+ Perl_croak(aTHX_ "panic: pad_add_name_pvn illegal flag bits 0x%" UVxf,
(UV)flags);
namesv = newSV_type((ourstash || typestash) ? SVt_PVMG : SVt_PVNV);
+
+ if ((is_utf8 = ((flags & padadd_UTF8_NAME) != 0))) {
+ namepv = (const char*)bytes_from_utf8((U8*)namepv, &namelen, &is_utf8);
+ }
- /* Until we're using the length for real, cross check that we're being told
- the truth. */
- PERL_UNUSED_ARG(len);
- assert(strlen(name) == len);
+ sv_setpvn(namesv, namepv, namelen);
- sv_setpv(namesv, name);
+ if (is_utf8) {
+ flags |= padadd_UTF8_NAME;
+ SvUTF8_on(namesv);
+ }
+ else
+ flags &= ~padadd_UTF8_NAME;
if ((flags & padadd_NO_DUP_CHECK) == 0) {
/* check for duplicate declaration */
pad_check_dup(namesv, flags & padadd_OUR, ourstash);
}
- offset = pad_add_name_sv(namesv, flags, typestash, ourstash);
+ offset = pad_alloc_name(namesv, flags & ~padadd_UTF8_NAME, typestash, ourstash);
/* not yet introduced */
- COP_SEQ_RANGE_LOW_set(namesv, PAD_MAX); /* min */
- COP_SEQ_RANGE_HIGH_set(namesv, 0); /* max */
+ COP_SEQ_RANGE_LOW_set(namesv, PERL_PADSEQ_INTRO);
+ COP_SEQ_RANGE_HIGH_set(namesv, 0);
if (!PL_min_intro_pending)
PL_min_intro_pending = offset;
PL_max_intro_pending = offset;
/* if it's not a simple scalar, replace with an AV or HV */
- /* XXX DAPM since slot has been allocated, replace
- * av_store with PL_curpad[offset] ? */
- if (*name == '@')
- av_store(PL_comppad, offset, MUTABLE_SV(newAV()));
- else if (*name == '%')
- av_store(PL_comppad, offset, MUTABLE_SV(newHV()));
- SvPADMY_on(PL_curpad[offset]);
+ assert(SvTYPE(PL_curpad[offset]) == SVt_NULL);
+ assert(SvREFCNT(PL_curpad[offset]) == 1);
+ if (namelen != 0 && *namepv == '@')
+ sv_upgrade(PL_curpad[offset], SVt_PVAV);
+ else if (namelen != 0 && *namepv == '%')
+ sv_upgrade(PL_curpad[offset], SVt_PVHV);
+ assert(SvPADMY(PL_curpad[offset]));
DEBUG_Xv(PerlIO_printf(Perl_debug_log,
"Pad addname: %ld \"%s\" new lex=0x%"UVxf"\n",
- (long)offset, name, PTR2UV(PL_curpad[offset])));
+ (long)offset, SvPVX(namesv),
+ PTR2UV(PL_curpad[offset])));
return offset;
}
+/*
+=for apidoc Am|PADOFFSET|pad_add_name_pv|const char *name|U32 flags|HV *typestash|HV *ourstash
+
+Exactly like L</pad_add_name_pvn>, but takes a nul-terminated string
+instead of a string/length pair.
+=cut
+*/
+PADOFFSET
+Perl_pad_add_name_pv(pTHX_ const char *name,
+ const U32 flags, HV *typestash, HV *ourstash)
+{
+ PERL_ARGS_ASSERT_PAD_ADD_NAME_PV;
+ return pad_add_name_pvn(name, strlen(name), flags, typestash, ourstash);
+}
/*
-=for apidoc pad_alloc
+=for apidoc Am|PADOFFSET|pad_add_name_sv|SV *name|U32 flags|HV *typestash|HV *ourstash
-Allocate a new my or tmp pad entry. For a my, simply push a null SV onto
-the end of PL_comppad, but for a tmp, scan the pad from PL_padix upwards
-for a slot which has no name and no active value.
+Exactly like L</pad_add_name_pvn>, but takes the name string in the form
+of an SV instead of a string/length pair.
+
+=cut
+*/
+
+PADOFFSET
+Perl_pad_add_name_sv(pTHX_ SV *name, U32 flags, HV *typestash, HV *ourstash)
+{
+ char *namepv;
+ STRLEN namelen;
+ PERL_ARGS_ASSERT_PAD_ADD_NAME_SV;
+ namepv = SvPV(name, namelen);
+ if (SvUTF8(name))
+ flags |= padadd_UTF8_NAME;
+ return pad_add_name_pvn(namepv, namelen, flags, typestash, ourstash);
+}
+
+/*
+=for apidoc Amx|PADOFFSET|pad_alloc|I32 optype|U32 tmptype
+
+Allocates a place in the currently-compiling pad,
+returning the offset of the allocated pad slot.
+No name is initially attached to the pad slot.
+I<tmptype> is a set of flags indicating the kind of pad entry required,
+which will be set in the value SV for the allocated pad entry:
+
+ SVs_PADMY named lexical variable ("my", "our", "state")
+ SVs_PADTMP unnamed temporary store
+
+I<optype> should be an opcode indicating the type of operation that the
+pad entry is to support. This doesn't affect operational semantics,
+but is used for debugging.
=cut
*/
/* XXX DAPM integrate alloc(), add_name() and add_anon(),
* or at least rationalise ??? */
-/* And flag whether the incoming name is UTF8 or 8 bit?
- Could do this either with the +ve/-ve hack of the HV code, or expanding
- the flag bits. Either way, this makes proper Unicode safe pad support.
- NWC
-*/
PADOFFSET
Perl_pad_alloc(pTHX_ I32 optype, U32 tmptype)
ASSERT_CURPAD_ACTIVE("pad_alloc");
if (AvARRAY(PL_comppad) != PL_curpad)
- Perl_croak(aTHX_ "panic: pad_alloc");
+ Perl_croak(aTHX_ "panic: pad_alloc, %p!=%p",
+ AvARRAY(PL_comppad), PL_curpad);
if (PL_pad_reset_pending)
pad_reset();
if (tmptype & SVs_PADMY) {
+ /* For a my, simply push a null SV onto the end of PL_comppad. */
sv = *av_fetch(PL_comppad, AvFILLp(PL_comppad) + 1, TRUE);
retval = AvFILLp(PL_comppad);
}
else {
+ /* For a tmp, scan the pad from PL_padix upwards
+ * for a slot which has no name and no active value.
+ */
SV * const * const names = AvARRAY(PL_comppad_name);
const SSize_t names_fill = AvFILLp(PL_comppad_name);
for (;;) {
}
/*
-=for apidoc pad_add_anon
+=for apidoc Am|PADOFFSET|pad_add_anon|CV *func|I32 optype
+
+Allocates a place in the currently-compiling pad (via L</pad_alloc>)
+for an anonymous function that is lexically scoped inside the
+currently-compiling function.
+The function I<func> is linked into the pad, and its C<CvOUTSIDE> link
+to the outer scope is weakened to avoid a reference loop.
-Add an anon code entry to the current compiling pad
+One reference count is stolen, so you may need to do C<SvREFCNT_inc(func)>.
+
+I<optype> should be an opcode indicating the type of operation that the
+pad entry is to support. This doesn't affect operational semantics,
+but is used for debugging.
=cut
*/
PADOFFSET
-Perl_pad_add_anon(pTHX_ SV* sv, OPCODE op_type)
+Perl_pad_add_anon(pTHX_ CV* func, I32 optype)
{
dVAR;
PADOFFSET ix;
pad_peg("add_anon");
sv_setpvs(name, "&");
- /* Are these two actually ever read? */
- COP_SEQ_RANGE_HIGH_set(name, ~0);
- COP_SEQ_RANGE_LOW_set(name, 1);
- ix = pad_alloc(op_type, SVs_PADMY);
+ /* These two aren't used; just make sure they're not equal to
+ * PERL_PADSEQ_INTRO */
+ COP_SEQ_RANGE_LOW_set(name, 0);
+ COP_SEQ_RANGE_HIGH_set(name, 0);
+ ix = pad_alloc(optype, SVs_PADMY);
av_store(PL_comppad_name, ix, name);
/* XXX DAPM use PL_curpad[] ? */
- av_store(PL_comppad, ix, sv);
- SvPADMY_on(sv);
+ if (SvTYPE(func) == SVt_PVCV || !CvOUTSIDE(func))
+ av_store(PL_comppad, ix, (SV*)func);
+ else {
+ SV *rv = newRV_noinc((SV *)func);
+ sv_rvweaken(rv);
+ assert (SvTYPE(func) == SVt_PVFM);
+ av_store(PL_comppad, ix, rv);
+ }
+ SvPADMY_on((SV*)func);
/* to avoid ref loops, we never have parent + child referencing each
* other simultaneously */
- if (CvOUTSIDE((const CV *)sv)) {
- assert(!CvWEAKOUTSIDE((const CV *)sv));
- CvWEAKOUTSIDE_on(MUTABLE_CV(sv));
- SvREFCNT_dec(CvOUTSIDE(MUTABLE_CV(sv)));
+ if (CvOUTSIDE(func) && SvTYPE(func) == SVt_PVCV) {
+ assert(!CvWEAKOUTSIDE(func));
+ CvWEAKOUTSIDE_on(func);
+ SvREFCNT_dec(CvOUTSIDE(func));
}
return ix;
}
-
-
/*
=for apidoc pad_check_dup
Check for duplicate declarations: report any of:
+
* a my in the current scope with the same name;
- * an our (anywhere in the pad) with the same name and the same stash
- as C<ourstash>
-C<is_our> indicates that the name to check is an 'our' declaration
+ * an our (anywhere in the pad) with the same name and the
+ same stash as C<ourstash>
+
+C<is_our> indicates that the name to check is an 'our' declaration.
=cut
*/
STATIC void
-S_pad_check_dup(pTHX_ SV *name, const U32 flags, const HV *ourstash)
+S_pad_check_dup(pTHX_ SV *name, U32 flags, const HV *ourstash)
{
dVAR;
SV **svp;
if (sv
&& sv != &PL_sv_undef
&& !SvFAKE(sv)
- && (COP_SEQ_RANGE_HIGH(sv) == PAD_MAX || COP_SEQ_RANGE_HIGH(sv) == 0)
+ && ( COP_SEQ_RANGE_LOW(sv) == PERL_PADSEQ_INTRO
+ || COP_SEQ_RANGE_HIGH(sv) == PERL_PADSEQ_INTRO)
&& sv_eq(name, sv))
{
if (is_our && (SvPAD_OUR(sv)))
"\"%s\" variable %"SVf" masks earlier declaration in same %s",
(is_our ? "our" : PL_parser->in_my == KEY_my ? "my" : "state"),
sv,
- (COP_SEQ_RANGE_HIGH(sv) == PAD_MAX ? "scope" : "statement"));
+ (COP_SEQ_RANGE_HIGH(sv) == PERL_PADSEQ_INTRO
+ ? "scope" : "statement"));
--off;
break;
}
}
/* check the rest of the pad */
if (is_our) {
- do {
+ while (off > 0) {
SV * const sv = svp[off];
if (sv
&& sv != &PL_sv_undef
&& !SvFAKE(sv)
- && (COP_SEQ_RANGE_HIGH(sv) == PAD_MAX || COP_SEQ_RANGE_HIGH(sv) == 0)
+ && ( COP_SEQ_RANGE_LOW(sv) == PERL_PADSEQ_INTRO
+ || COP_SEQ_RANGE_HIGH(sv) == PERL_PADSEQ_INTRO)
&& SvOURSTASH(sv) == ourstash
&& sv_eq(name, sv))
{
"\t(Did you mean \"local\" instead of \"our\"?)\n");
break;
}
- } while ( off-- > 0 );
+ --off;
+ }
}
}
/*
-=for apidoc pad_findmy
+=for apidoc Am|PADOFFSET|pad_findmy_pvn|const char *namepv|STRLEN namelen|U32 flags
-Given a lexical name, try to find its offset, first in the current pad,
-or failing that, in the pads of any lexically enclosing subs (including
-the complications introduced by eval). If the name is found in an outer pad,
-then a fake entry is added to the current pad.
-Returns the offset in the current pad, or NOT_IN_PAD on failure.
+Given the name of a lexical variable, find its position in the
+currently-compiling pad.
+I<namepv>/I<namelen> specify the variable's name, including leading sigil.
+I<flags> is reserved and must be zero.
+If it is not in the current pad but appears in the pad of any lexically
+enclosing scope, then a pseudo-entry for it is added in the current pad.
+Returns the offset in the current pad,
+or C<NOT_IN_PAD> if no such lexical is in scope.
=cut
*/
PADOFFSET
-Perl_pad_findmy(pTHX_ const char *name, STRLEN len, U32 flags)
+Perl_pad_findmy_pvn(pTHX_ const char *namepv, STRLEN namelen, U32 flags)
{
dVAR;
SV *out_sv;
const AV *nameav;
SV **name_svp;
- PERL_ARGS_ASSERT_PAD_FINDMY;
+ PERL_ARGS_ASSERT_PAD_FINDMY_PVN;
- pad_peg("pad_findmy");
+ pad_peg("pad_findmy_pvn");
- if (flags)
- Perl_croak(aTHX_ "panic: pad_findmy illegal flag bits 0x%" UVxf,
+ if (flags & ~padadd_UTF8_NAME)
+ Perl_croak(aTHX_ "panic: pad_findmy_pvn illegal flag bits 0x%" UVxf,
(UV)flags);
- /* Yes, it is a bug (read work in progress) that we're not really using this
- length parameter, and instead relying on strlen() later on. But I'm not
- comfortable about changing the pad API piecemeal to use and rely on
- lengths. This only exists to avoid an "unused parameter" warning. */
- if (len < 2)
- return NOT_IN_PAD;
+ if (flags & padadd_UTF8_NAME) {
+ bool is_utf8 = TRUE;
+ namepv = (const char*)bytes_from_utf8((U8*)namepv, &namelen, &is_utf8);
- /* But until we're using the length for real, cross check that we're being
- told the truth. */
- assert(strlen(name) == len);
+ if (is_utf8)
+ flags |= padadd_UTF8_NAME;
+ else
+ flags &= ~padadd_UTF8_NAME;
+ }
- offset = pad_findlex(name, PL_compcv, PL_cop_seqmax, 1,
- NULL, &out_sv, &out_flags);
+ offset = pad_findlex(namepv, namelen, flags,
+ PL_compcv, PL_cop_seqmax, 1, NULL, &out_sv, &out_flags);
if ((PADOFFSET)offset != NOT_IN_PAD)
return offset;
* our $foo = 0 unless defined $foo;
* to not give a warning. (Yes, this is a hack) */
- nameav = MUTABLE_AV(AvARRAY(CvPADLIST(PL_compcv))[0]);
+ nameav = PadlistARRAY(CvPADLIST(PL_compcv))[0];
name_svp = AvARRAY(nameav);
for (offset = AvFILLp(nameav); offset > 0; offset--) {
const SV * const namesv = name_svp[offset];
if (namesv && namesv != &PL_sv_undef
&& !SvFAKE(namesv)
&& (SvPAD_OUR(namesv))
- && strEQ(SvPVX_const(namesv), name)
- && COP_SEQ_RANGE_LOW(namesv) == PAD_MAX /* min */
+ && SvCUR(namesv) == namelen
+ && sv_eq_pvn_flags(aTHX_ namesv, namepv, namelen,
+ flags & padadd_UTF8_NAME ? SVf_UTF8 : 0 )
+ && COP_SEQ_RANGE_LOW(namesv) == PERL_PADSEQ_INTRO
)
return offset;
}
}
/*
- * Returns the offset of a lexical $_, if there is one, at run time.
- * Used by the UNDERBAR XS macro.
- */
+=for apidoc Am|PADOFFSET|pad_findmy_pv|const char *name|U32 flags
+
+Exactly like L</pad_findmy_pvn>, but takes a nul-terminated string
+instead of a string/length pair.
+
+=cut
+*/
+
+PADOFFSET
+Perl_pad_findmy_pv(pTHX_ const char *name, U32 flags)
+{
+ PERL_ARGS_ASSERT_PAD_FINDMY_PV;
+ return pad_findmy_pvn(name, strlen(name), flags);
+}
+
+/*
+=for apidoc Am|PADOFFSET|pad_findmy_sv|SV *name|U32 flags
+
+Exactly like L</pad_findmy_pvn>, but takes the name string in the form
+of an SV instead of a string/length pair.
+
+=cut
+*/
+
+PADOFFSET
+Perl_pad_findmy_sv(pTHX_ SV *name, U32 flags)
+{
+ char *namepv;
+ STRLEN namelen;
+ PERL_ARGS_ASSERT_PAD_FINDMY_SV;
+ namepv = SvPV(name, namelen);
+ if (SvUTF8(name))
+ flags |= padadd_UTF8_NAME;
+ return pad_findmy_pvn(namepv, namelen, flags);
+}
+
+/*
+=for apidoc Amp|PADOFFSET|find_rundefsvoffset
+
+Find the position of the lexical C<$_> in the pad of the
+currently-executing function. Returns the offset in the current pad,
+or C<NOT_IN_PAD> if there is no lexical C<$_> in scope (in which case
+the global one should be used instead).
+L</find_rundefsv> is likely to be more convenient.
+
+=cut
+*/
PADOFFSET
Perl_find_rundefsvoffset(pTHX)
dVAR;
SV *out_sv;
int out_flags;
- return pad_findlex("$_", find_runcv(NULL), PL_curcop->cop_seq, 1,
+ return pad_findlex("$_", 2, 0, find_runcv(NULL), PL_curcop->cop_seq, 1,
NULL, &out_sv, &out_flags);
}
/*
-=for apidoc pad_findlex
+=for apidoc Am|SV *|find_rundefsv
+
+Find and return the variable that is named C<$_> in the lexical scope
+of the currently-executing function. This may be a lexical C<$_>,
+or will otherwise be the global one.
+
+=cut
+*/
+
+SV *
+Perl_find_rundefsv(pTHX)
+{
+ SV *namesv;
+ int flags;
+ PADOFFSET po;
+
+ po = pad_findlex("$_", 2, 0, find_runcv(NULL), PL_curcop->cop_seq, 1,
+ NULL, &namesv, &flags);
+
+ if (po == NOT_IN_PAD || SvPAD_OUR(namesv))
+ return DEFSV;
+
+ return PAD_SVl(po);
+}
+
+SV *
+Perl_find_rundefsv2(pTHX_ CV *cv, U32 seq)
+{
+ SV *namesv;
+ int flags;
+ PADOFFSET po;
+
+ PERL_ARGS_ASSERT_FIND_RUNDEFSV2;
+
+ po = pad_findlex("$_", 2, 0, cv, seq, 1,
+ NULL, &namesv, &flags);
+
+ if (po == NOT_IN_PAD || SvPAD_OUR(namesv))
+ return DEFSV;
+
+ return AvARRAY(PadlistARRAY(CvPADLIST(cv))[CvDEPTH(cv)])[po];
+}
+
+/*
+=for apidoc m|PADOFFSET|pad_findlex|const char *namepv|STRLEN namelen|U32 flags|const CV* cv|U32 seq|int warn|SV** out_capture|SV** out_name_sv|int *out_flags
Find a named lexical anywhere in a chain of nested pads. Add fake entries
in the inner pads if it's found in an outer one.
STATIC PADOFFSET
-S_pad_findlex(pTHX_ const char *name, const CV* cv, U32 seq, int warn,
- SV** out_capture, SV** out_name_sv, int *out_flags)
+S_pad_findlex(pTHX_ const char *namepv, STRLEN namelen, U32 flags, const CV* cv, U32 seq,
+ int warn, SV** out_capture, SV** out_name_sv, int *out_flags)
{
dVAR;
I32 offset, new_offset;
SV *new_capture;
SV **new_capturep;
- const AV * const padlist = CvPADLIST(cv);
+ const PADLIST * const padlist = CvPADLIST(cv);
+ const bool staleok = !!(flags & padadd_STALEOK);
PERL_ARGS_ASSERT_PAD_FINDLEX;
+ if (flags & ~(padadd_UTF8_NAME|padadd_STALEOK))
+ Perl_croak(aTHX_ "panic: pad_findlex illegal flag bits 0x%" UVxf,
+ (UV)flags);
+ flags &= ~ padadd_STALEOK; /* one-shot flag */
+
*out_flags = 0;
DEBUG_Xv(PerlIO_printf(Perl_debug_log,
- "Pad findlex cv=0x%"UVxf" searching \"%s\" seq=%d%s\n",
- PTR2UV(cv), name, (int)seq, out_capture ? " capturing" : "" ));
+ "Pad findlex cv=0x%"UVxf" searching \"%.*s\" seq=%d%s\n",
+ PTR2UV(cv), (int)namelen, namepv, (int)seq,
+ out_capture ? " capturing" : "" ));
/* first, search this pad */
if (padlist) { /* not an undef CV */
I32 fake_offset = 0;
- const AV * const nameav = MUTABLE_AV(AvARRAY(padlist)[0]);
+ const AV * const nameav = PadlistARRAY(padlist)[0];
SV * const * const name_svp = AvARRAY(nameav);
for (offset = AvFILLp(nameav); offset > 0; offset--) {
const SV * const namesv = name_svp[offset];
if (namesv && namesv != &PL_sv_undef
- && strEQ(SvPVX_const(namesv), name))
+ && SvCUR(namesv) == namelen
+ && sv_eq_pvn_flags(aTHX_ namesv, namepv, namelen,
+ flags & padadd_UTF8_NAME ? SVf_UTF8 : 0))
{
- if (SvFAKE(namesv))
+ if (SvFAKE(namesv)) {
fake_offset = offset; /* in case we don't find a real one */
- else if ( seq > COP_SEQ_RANGE_LOW(namesv) /* min */
- && seq <= COP_SEQ_RANGE_HIGH(namesv)) /* max */
- break;
+ 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;
}
}
* instances. For now, we just test !CvUNIQUE(cv), but
* ideally, we should detect my's declared within loops
* etc - this would allow a wider range of 'not stayed
- * shared' warnings. We also treated alreadly-compiled
+ * shared' warnings. We also treated already-compiled
* lexes as not multi as viewed from evals. */
*out_flags = CvANON(cv) ?
{
if (warn)
Perl_ck_warner(aTHX_ packWARN(WARN_CLOSURE),
- "Variable \"%s\" is not available", name);
+ "Variable \"%"SVf"\" is not available",
+ newSVpvn_flags(namepv, namelen,
+ SVs_TEMP |
+ (flags & padadd_UTF8_NAME ? SVf_UTF8 : 0)));
+
*out_capture = NULL;
}
&& warn && ckWARN(WARN_CLOSURE)) {
newwarn = 0;
Perl_warner(aTHX_ packWARN(WARN_CLOSURE),
- "Variable \"%s\" will not stay shared", name);
+ "Variable \"%"SVf"\" will not stay shared",
+ newSVpvn_flags(namepv, namelen,
+ SVs_TEMP |
+ (flags & padadd_UTF8_NAME ? SVf_UTF8 : 0)));
}
if (fake_offset && CvANON(cv)
"Pad findlex cv=0x%"UVxf" chasing lex in outer pad\n",
PTR2UV(cv)));
n = *out_name_sv;
- (void) pad_findlex(name, CvOUTSIDE(cv),
+ (void) pad_findlex(namepv, namelen, flags, CvOUTSIDE(cv),
CvOUTSIDE_SEQ(cv),
newwarn, out_capture, out_name_sv, out_flags);
*out_name_sv = n;
return offset;
}
- *out_capture = AvARRAY(MUTABLE_AV(AvARRAY(padlist)[
- CvDEPTH(cv) ? CvDEPTH(cv) : 1]))[offset];
+ *out_capture = AvARRAY(PadlistARRAY(padlist)[
+ CvDEPTH(cv) ? CvDEPTH(cv) : 1])[offset];
DEBUG_Xv(PerlIO_printf(Perl_debug_log,
"Pad findlex cv=0x%"UVxf" found lex=0x%"UVxf"\n",
PTR2UV(cv), PTR2UV(*out_capture)));
if (SvPADSTALE(*out_capture)
+ && (!CvDEPTH(cv) || !staleok)
&& !SvPAD_STATE(name_svp[offset]))
{
Perl_ck_warner(aTHX_ packWARN(WARN_CLOSURE),
- "Variable \"%s\" is not available", name);
+ "Variable \"%"SVf"\" is not available",
+ newSVpvn_flags(namepv, namelen,
+ SVs_TEMP |
+ (flags & padadd_UTF8_NAME ? SVf_UTF8 : 0)));
*out_capture = NULL;
}
}
if (!*out_capture) {
- if (*name == '@')
+ if (namelen != 0 && *namepv == '@')
*out_capture = sv_2mortal(MUTABLE_SV(newAV()));
- else if (*name == '%')
+ else if (namelen != 0 && *namepv == '%')
*out_capture = sv_2mortal(MUTABLE_SV(newHV()));
else
*out_capture = sv_newmortal();
new_capturep = out_capture ? out_capture :
CvLATE(cv) ? NULL : &new_capture;
- offset = pad_findlex(name, CvOUTSIDE(cv), CvOUTSIDE_SEQ(cv), 1,
+ offset = pad_findlex(namepv, namelen,
+ flags | padadd_STALEOK*(new_capturep == &new_capture),
+ CvOUTSIDE(cv), CvOUTSIDE_SEQ(cv), 1,
new_capturep, out_name_sv, out_flags);
if ((PADOFFSET)offset == NOT_IN_PAD)
return NOT_IN_PAD;
{
/* This relies on sv_setsv_flags() upgrading the destination to the same
- type as the source, independant of the flags set, and on it being
+ type as the source, independent of the flags set, and on it being
"good" and only copying flag bits and pointers that it understands.
*/
SV *new_namesv = newSVsv(*out_name_sv);
AV * const ocomppad_name = PL_comppad_name;
PAD * const ocomppad = PL_comppad;
- PL_comppad_name = MUTABLE_AV(AvARRAY(padlist)[0]);
- PL_comppad = MUTABLE_AV(AvARRAY(padlist)[1]);
+ PL_comppad_name = PadlistARRAY(padlist)[0];
+ PL_comppad = PadlistARRAY(padlist)[1];
PL_curpad = AvARRAY(PL_comppad);
new_offset
- = pad_add_name_sv(new_namesv,
+ = pad_alloc_name(new_namesv,
(SvPAD_STATE(*out_name_sv) ? padadd_STATE : 0),
SvPAD_TYPED(*out_name_sv)
? SvSTASH(*out_name_sv) : NULL,
return new_offset;
}
-
#ifdef DEBUGGING
+
/*
-=for apidoc pad_sv
+=for apidoc Am|SV *|pad_sv|PADOFFSET po
-Get the value at offset po in the current pad.
+Get the value at offset I<po> in the current (compiling or executing) pad.
Use macro PAD_SV instead of calling this function directly.
=cut
*/
-
SV *
Perl_pad_sv(pTHX_ PADOFFSET po)
{
return PL_curpad[po];
}
-
/*
-=for apidoc pad_setsv
+=for apidoc Am|void|pad_setsv|PADOFFSET po|SV *sv
-Set the entry at offset po in the current pad to sv.
+Set the value at offset I<po> in the current (compiling or executing) pad.
Use the macro PAD_SETSV() rather than calling this function directly.
=cut
);
PL_curpad[po] = sv;
}
-#endif
-
+#endif /* DEBUGGING */
/*
-=for apidoc pad_block_start
+=for apidoc m|void|pad_block_start|int full
-Update the pad compilation state variables on entry to a new block
+Update the pad compilation state variables on entry to a new block.
=cut
*/
PL_pad_reset_pending = FALSE;
}
-
/*
-=for apidoc intro_my
+=for apidoc m|U32|intro_my
-"Introduce" my variables to visible status.
+"Introduce" my variables to visible status. This is called during parsing
+at the end of each statement to make lexical variables visible to
+subsequent statements.
=cut
*/
dVAR;
SV **svp;
I32 i;
+ U32 seq;
ASSERT_CURPAD_ACTIVE("intro_my");
if (! PL_min_intro_pending)
for (i = PL_min_intro_pending; i <= PL_max_intro_pending; i++) {
SV * const sv = svp[i];
- if (sv && sv != &PL_sv_undef && !SvFAKE(sv) && !COP_SEQ_RANGE_HIGH(sv)) {
- COP_SEQ_RANGE_HIGH_set(sv, PAD_MAX); /* Don't know scope end yet. */
+ if (sv && sv != &PL_sv_undef && !SvFAKE(sv)
+ && COP_SEQ_RANGE_LOW(sv) == PERL_PADSEQ_INTRO)
+ {
+ COP_SEQ_RANGE_HIGH_set(sv, PERL_PADSEQ_INTRO); /* Don't know scope end yet. */
COP_SEQ_RANGE_LOW_set(sv, PL_cop_seqmax);
DEBUG_Xv(PerlIO_printf(Perl_debug_log,
"Pad intromy: %ld \"%s\", (%lu,%lu)\n",
);
}
}
+ seq = PL_cop_seqmax;
+ PL_cop_seqmax++;
+ if (PL_cop_seqmax == PERL_PADSEQ_INTRO) /* not a legal value */
+ PL_cop_seqmax++;
PL_min_intro_pending = 0;
PL_comppad_name_fill = PL_max_intro_pending; /* Needn't search higher */
DEBUG_Xv(PerlIO_printf(Perl_debug_log,
- "Pad intromy: seq -> %ld\n", (long)(PL_cop_seqmax+1)));
+ "Pad intromy: seq -> %ld\n", (long)(PL_cop_seqmax)));
- return PL_cop_seqmax++;
+ return seq;
}
/*
-=for apidoc pad_leavemy
+=for apidoc m|void|pad_leavemy
Cleanup at end of scope during compilation: set the max seq number for
lexicals in this scope and warn of any lexicals that never got introduced.
/* "Deintroduce" my variables that are leaving with this scope. */
for (off = AvFILLp(PL_comppad_name); off > PL_comppad_name_fill; off--) {
const SV * const sv = svp[off];
- if (sv && sv != &PL_sv_undef && !SvFAKE(sv) && COP_SEQ_RANGE_HIGH(sv) == PAD_MAX) {
+ if (sv && sv != &PL_sv_undef && !SvFAKE(sv)
+ && COP_SEQ_RANGE_HIGH(sv) == PERL_PADSEQ_INTRO)
+ {
COP_SEQ_RANGE_HIGH_set(sv, PL_cop_seqmax);
DEBUG_Xv(PerlIO_printf(Perl_debug_log,
"Pad leavemy: %ld \"%s\", (%lu,%lu)\n",
}
}
PL_cop_seqmax++;
+ if (PL_cop_seqmax == PERL_PADSEQ_INTRO) /* not a legal value */
+ PL_cop_seqmax++;
DEBUG_Xv(PerlIO_printf(Perl_debug_log,
"Pad leavemy: seq = %ld\n", (long)PL_cop_seqmax));
}
-
/*
-=for apidoc pad_swipe
+=for apidoc m|void|pad_swipe|PADOFFSET po|bool refadjust
Abandon the tmp in the current pad at offset po and replace with a
new one.
if (!PL_curpad)
return;
if (AvARRAY(PL_comppad) != PL_curpad)
- Perl_croak(aTHX_ "panic: pad_swipe curpad");
- if (!po)
- Perl_croak(aTHX_ "panic: pad_swipe po");
+ Perl_croak(aTHX_ "panic: pad_swipe curpad, %p!=%p",
+ AvARRAY(PL_comppad), PL_curpad);
+ if (!po || ((SSize_t)po) > AvFILLp(PL_comppad))
+ Perl_croak(aTHX_ "panic: pad_swipe po=%ld, fill=%ld",
+ (long)po, (long)AvFILLp(PL_comppad));
DEBUG_X(PerlIO_printf(Perl_debug_log,
"Pad 0x%"UVxf"[0x%"UVxf"] swipe: %ld\n",
PL_padix = po - 1;
}
-
/*
-=for apidoc pad_reset
+=for apidoc m|void|pad_reset
Mark all the current temporaries for reuse
dVAR;
#ifdef USE_BROKEN_PAD_RESET
if (AvARRAY(PL_comppad) != PL_curpad)
- Perl_croak(aTHX_ "panic: pad_reset curpad");
+ Perl_croak(aTHX_ "panic: pad_reset curpad, %p!=%p",
+ AvARRAY(PL_comppad), PL_curpad);
DEBUG_X(PerlIO_printf(Perl_debug_log,
"Pad 0x%"UVxf"[0x%"UVxf"] reset: padix %ld -> %ld",
);
if (!PL_tainting) { /* Can't mix tainted and non-tainted temporaries. */
- register I32 po;
+ I32 po;
for (po = AvMAX(PL_comppad); po > PL_padix_floor; po--) {
if (PL_curpad[po] && !SvIMMORTAL(PL_curpad[po]))
SvPADTMP_off(PL_curpad[po]);
PL_pad_reset_pending = FALSE;
}
-
/*
-=for apidoc pad_tidy
+=for apidoc Amx|void|pad_tidy|padtidy_type type
-Tidy up a pad after we've finished compiling it:
- * remove most stuff from the pads of anonsub prototypes;
- * give it a @_;
- * mark tmps as such.
+Tidy up a pad at the end of compilation of the code to which it belongs.
+Jobs performed here are: remove most stuff from the pads of anonsub
+prototypes; give it a @_; mark temporaries as such. I<type> indicates
+the kind of subroutine:
+
+ padtidy_SUB ordinary subroutine
+ padtidy_SUBCLONE prototype for lexical closure
+ padtidy_FORMAT format
=cut
*/
* so that for example the eval's CV in C<< sub { eval '$x' } >> gets
* the right CvOUTSIDE.
* If running with -d, *any* sub may potentially have an eval
- * excuted within it.
+ * executed within it.
*/
if (PL_cv_has_eval || PL_perldb) {
DEBUG_Xv(PerlIO_printf(Perl_debug_log,
"Pad clone on cv=0x%"UVxf"\n", PTR2UV(cv)));
CvCLONE_on(cv);
+ CvHASEVAL_on(cv);
}
}
}
else if (type == padtidy_SUB) {
/* XXX DAPM this same bit of code keeps appearing !!! Rationalise? */
AV * const av = newAV(); /* Will be @_ */
- av_extend(av, 0);
av_store(PL_comppad, 0, MUTABLE_SV(av));
AvREIFY_only(av);
}
PL_curpad = AvARRAY(PL_comppad);
}
-
/*
-=for apidoc pad_free
+=for apidoc m|void|pad_free|PADOFFSET po
Free the SV at offset po in the current pad.
if (!PL_curpad)
return;
if (AvARRAY(PL_comppad) != PL_curpad)
- Perl_croak(aTHX_ "panic: pad_free curpad");
+ Perl_croak(aTHX_ "panic: pad_free curpad, %p!=%p",
+ AvARRAY(PL_comppad), PL_curpad);
if (!po)
Perl_croak(aTHX_ "panic: pad_free po");
);
if (PL_curpad[po] && PL_curpad[po] != &PL_sv_undef) {
- SvPADTMP_off(PL_curpad[po]);
-#ifdef USE_ITHREADS
- /* SV could be a shared hash key (eg bugid #19022) */
- if (!SvIsCOW(PL_curpad[po]))
- SvREADONLY_off(PL_curpad[po]); /* could be a freed constant */
-#endif
+ SvFLAGS(PL_curpad[po]) &= ~SVs_PADTMP; /* also clears SVs_PADSTALE */
}
if ((I32)po < PL_padix)
PL_padix = po - 1;
}
-
-
/*
-=for apidoc do_dump_pad
+=for apidoc m|void|do_dump_pad|I32 level|PerlIO *file|PADLIST *padlist|int full
Dump the contents of a padlist
if (!padlist) {
return;
}
- pad_name = MUTABLE_AV(*av_fetch(MUTABLE_AV(padlist), 0, FALSE));
- pad = MUTABLE_AV(*av_fetch(MUTABLE_AV(padlist), 1, FALSE));
+ pad_name = *PadlistARRAY(padlist);
+ pad = PadlistARRAY(padlist)[1];
pname = AvARRAY(pad_name);
ppad = AvARRAY(pad);
Perl_dump_indent(aTHX_ level, file,
}
}
-
+#ifdef DEBUGGING
/*
-=for apidoc cv_dump
+=for apidoc m|void|cv_dump|CV *cv|const char *title
dump the contents of a CV
=cut
*/
-#ifdef DEBUGGING
STATIC void
S_cv_dump(pTHX_ const CV *cv, const char *title)
{
dVAR;
const CV * const outside = CvOUTSIDE(cv);
- AV* const padlist = CvPADLIST(cv);
+ PADLIST* const padlist = CvPADLIST(cv);
PERL_ARGS_ASSERT_CV_DUMP;
" PADLIST = 0x%"UVxf"\n", PTR2UV(padlist));
do_dump_pad(1, Perl_debug_log, padlist, 1);
}
-#endif /* DEBUGGING */
-
-
-
+#endif /* DEBUGGING */
/*
-=for apidoc cv_clone
+=for apidoc Am|CV *|cv_clone|CV *proto
-Clone a CV: make a new CV which points to the same code etc, but which
-has a newly-created pad built by copying the prototype pad and capturing
-any outer lexicals.
+Clone a CV, making a lexical closure. I<proto> supplies the prototype
+of the function: its code, pad structure, and other attributes.
+The prototype is combined with a capture of outer lexicals to which the
+code refers, which are taken from the currently-executing instance of
+the immediately surrounding code.
=cut
*/
{
dVAR;
I32 ix;
- AV* const protopadlist = CvPADLIST(proto);
- const AV *const protopad_name = (const AV *)*av_fetch(protopadlist, 0, FALSE);
- const AV *const protopad = (const AV *)*av_fetch(protopadlist, 1, FALSE);
+ PADLIST* const protopadlist = CvPADLIST(proto);
+ PAD *const protopad_name = *PadlistARRAY(protopadlist);
+ const PAD *const protopad = PadlistARRAY(protopadlist)[1];
SV** const pname = AvARRAY(protopad_name);
SV** const ppad = AvARRAY(protopad);
const I32 fname = AvFILLp(protopad_name);
assert(!CvUNIQUE(proto));
- /* Since cloneable anon subs can be nested, CvOUTSIDE may point
+ /* Anonymous subs have a weak CvOUTSIDE pointer, so its value is not
+ * reliable. The currently-running sub is always the one we need to
+ * close over.
+ * Note that in general for formats, CvOUTSIDE != find_runcv.
+ * Since formats may be nested inside closures, CvOUTSIDE may point
* to a prototype; we instead want the cloned parent who called us.
- * Note that in general for formats, CvOUTSIDE != find_runcv */
+ */
- outside = CvOUTSIDE(proto);
- if (outside && CvCLONE(outside) && ! CvCLONED(outside))
+ if (SvTYPE(proto) == SVt_PVCV)
outside = find_runcv(NULL);
- depth = CvDEPTH(outside);
+ else {
+ outside = CvOUTSIDE(proto);
+ if ((CvCLONE(outside) && ! CvCLONED(outside))
+ || !CvPADLIST(outside)
+ || CvPADLIST(outside)->xpadl_id != protopadlist->xpadl_outid) {
+ outside = find_runcv_where(
+ FIND_RUNCV_padid_eq, (IV)protopadlist->xpadl_outid, NULL
+ );
+ /* outside could be null */
+ }
+ }
+ depth = outside ? CvDEPTH(outside) : 0;
assert(depth || SvTYPE(proto) == SVt_PVFM);
if (!depth)
depth = 1;
- assert(CvPADLIST(outside));
+ assert(SvTYPE(proto) == SVt_PVFM || CvPADLIST(outside));
ENTER;
SAVESPTR(PL_compcv);
cv = PL_compcv = MUTABLE_CV(newSV_type(SvTYPE(proto)));
- CvFLAGS(cv) = CvFLAGS(proto) & ~(CVf_CLONE|CVf_WEAKOUTSIDE);
+ CvFLAGS(cv) = CvFLAGS(proto) & ~(CVf_CLONE|CVf_WEAKOUTSIDE|CVf_CVGV_RC
+ |CVf_SLABBED);
CvCLONED_on(cv);
-#ifdef USE_ITHREADS
- CvFILE(cv) = CvISXSUB(proto) ? CvFILE(proto)
- : savepv(CvFILE(proto));
-#else
- CvFILE(cv) = CvFILE(proto);
-#endif
- CvGV(cv) = CvGV(proto);
- CvSTASH(cv) = CvSTASH(proto);
+ CvFILE(cv) = CvDYNFILE(proto) ? savepv(CvFILE(proto))
+ : CvFILE(proto);
+ if (CvNAMED(proto))
+ SvANY(cv)->xcv_gv_u.xcv_hek = share_hek_hek(CvNAME_HEK(proto));
+ else CvGV_set(cv,CvGV(proto));
+ CvSTASH_set(cv, CvSTASH(proto));
OP_REFCNT_LOCK;
CvROOT(cv) = OpREFCNT_inc(CvROOT(proto));
OP_REFCNT_UNLOCK;
CvSTART(cv) = CvSTART(proto);
- CvOUTSIDE(cv) = MUTABLE_CV(SvREFCNT_inc_simple(outside));
+ if (CvHASEVAL(cv))
+ CvOUTSIDE(cv) = MUTABLE_CV(SvREFCNT_inc_simple(outside));
CvOUTSIDE_SEQ(cv) = CvOUTSIDE_SEQ(proto);
if (SvPOK(proto))
sv_setpvn(MUTABLE_SV(cv), SvPVX_const(proto), SvCUR(proto));
+ if (SvMAGIC(proto))
+ mg_copy((SV *)proto, (SV *)cv, 0, 0);
+ SAVESPTR(PL_comppad_name);
+ PL_comppad_name = protopad_name;
CvPADLIST(cv) = pad_new(padnew_CLONE|padnew_SAVE);
+ CvPADLIST(cv)->xpadl_id = protopadlist->xpadl_id;
av_fill(PL_comppad, fpad);
- for (ix = fname; ix >= 0; ix--)
- av_store(PL_comppad_name, ix, SvREFCNT_inc(pname[ix]));
PL_curpad = AvARRAY(PL_comppad);
- outpad = AvARRAY(AvARRAY(CvPADLIST(outside))[depth]);
+ outpad = outside && CvPADLIST(outside)
+ ? AvARRAY(PadlistARRAY(CvPADLIST(outside))[depth])
+ : NULL;
+ assert(outpad || SvTYPE(cv) == SVt_PVFM);
+ if (outpad) CvPADLIST(cv)->xpadl_outid = CvPADLIST(outside)->xpadl_id;
for (ix = fpad; ix > 0; ix--) {
SV* const namesv = (ix <= fname) ? pname[ix] : NULL;
SV *sv = NULL;
if (namesv && namesv != &PL_sv_undef) { /* lexical */
if (SvFAKE(namesv)) { /* lexical from outside? */
- sv = outpad[PARENT_PAD_INDEX(namesv)];
- assert(sv);
- /* formats may have an inactive parent,
- while my $x if $false can leave an active var marked as
- stale. And state vars are always available */
- if (SvPADSTALE(sv) && !SvPAD_STATE(namesv)) {
+ /* formats may have an inactive, or even undefined, parent;
+ but state vars are always available. */
+ if (!outpad || !(sv = outpad[PARENT_PAD_INDEX(namesv)])
+ || ( SvPADSTALE(sv) && !SvPAD_STATE(namesv)
+ && (!outside || !CvDEPTH(outside))) ) {
+ assert(SvTYPE(cv) == SVt_PVFM);
Perl_ck_warner(aTHX_ packWARN(WARN_CLOSURE),
- "Variable \"%s\" is not available", SvPVX_const(namesv));
+ "Variable \"%"SVf"\" is not available", namesv);
sv = NULL;
}
else
DEBUG_Xv(
PerlIO_printf(Perl_debug_log, "\nPad CV clone\n");
- cv_dump(outside, "Outside");
+ if (outside) cv_dump(outside, "Outside");
cv_dump(proto, "Proto");
cv_dump(cv, "To");
);
SV* const const_sv = op_const_sv(CvSTART(cv), cv);
if (const_sv) {
SvREFCNT_dec(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 {
return cv;
}
-
/*
-=for apidoc pad_fixup_inner_anons
+=for apidoc m|void|pad_fixup_inner_anons|PADLIST *padlist|CV *old_cv|CV *new_cv
For any anon CVs in the pad, change CvOUTSIDE of that CV from
old_cv to new_cv if necessary. Needed when a newly-compiled CV has to be
{
dVAR;
I32 ix;
- AV * const comppad_name = MUTABLE_AV(AvARRAY(padlist)[0]);
- AV * const comppad = MUTABLE_AV(AvARRAY(padlist)[1]);
+ AV * const comppad_name = PadlistARRAY(padlist)[0];
+ AV * const comppad = PadlistARRAY(padlist)[1];
SV ** const namepad = AvARRAY(comppad_name);
SV ** const curpad = AvARRAY(comppad);
for (ix = AvFILLp(comppad_name); ix > 0; ix--) {
const SV * const namesv = namepad[ix];
- if (namesv && namesv != &PL_sv_undef
+ if (namesv && namesv != &PL_sv_undef && !SvPAD_STATE(namesv)
&& *SvPVX_const(namesv) == '&')
{
+ if (SvTYPE(curpad[ix]) == SVt_PVCV) {
CV * const innercv = MUTABLE_CV(curpad[ix]);
assert(CvWEAKOUTSIDE(innercv));
assert(CvOUTSIDE(innercv) == old_cv);
CvOUTSIDE(innercv) = new_cv;
+ }
+ else { /* format reference */
+ SV * const rv = curpad[ix];
+ CV *innercv;
+ if (!SvOK(rv)) continue;
+ assert(SvROK(rv));
+ assert(SvWEAKREF(rv));
+ innercv = (CV *)SvRV(rv);
+ assert(!CvWEAKOUTSIDE(innercv));
+ SvREFCNT_dec(CvOUTSIDE(innercv));
+ CvOUTSIDE(innercv) = (CV *)SvREFCNT_inc_simple_NN(new_cv);
+ }
}
}
}
-
/*
-=for apidoc pad_push
+=for apidoc m|void|pad_push|PADLIST *padlist|int depth
Push a new pad frame onto the padlist, unless there's already a pad at
this depth, in which case don't bother creating a new one. Then give
PERL_ARGS_ASSERT_PAD_PUSH;
- if (depth > AvFILLp(padlist)) {
- SV** const svp = AvARRAY(padlist);
+ if (depth > PadlistMAX(padlist) || !PadlistARRAY(padlist)[depth]) {
+ PAD** const svp = PadlistARRAY(padlist);
AV* const newpad = newAV();
SV** const oldpad = AvARRAY(svp[depth-1]);
I32 ix = AvFILLp((const AV *)svp[1]);
}
}
av = newAV();
- av_extend(av, 0);
av_store(newpad, 0, MUTABLE_SV(av));
AvREIFY_only(av);
- av_store(padlist, depth, MUTABLE_SV(newpad));
- AvFILLp(padlist) = depth;
+ padlist_store(padlist, depth, newpad);
}
}
+/*
+=for apidoc Am|HV *|pad_compname_type|PADOFFSET po
+
+Looks up the type of the lexical variable at position I<po> in the
+currently-compiling pad. If the variable is typed, the stash of the
+class to which it is typed is returned. If not, C<NULL> is returned.
+
+=cut
+*/
HV *
Perl_pad_compname_type(pTHX_ const PADOFFSET po)
# define av_dup_inc(s,t) MUTABLE_AV(sv_dup_inc((const SV *)s,t))
-AV *
-Perl_padlist_dup(pTHX_ AV *const srcpad, CLONE_PARAMS *const param)
+/*
+=for apidoc padlist_dup
+
+Duplicates a pad.
+
+=cut
+*/
+
+PADLIST *
+Perl_padlist_dup(pTHX_ PADLIST *srcpad, CLONE_PARAMS *param)
{
- AV *dstpad;
+ PADLIST *dstpad;
+ bool cloneall;
+ PADOFFSET max;
+
PERL_ARGS_ASSERT_PADLIST_DUP;
if (!srcpad)
return NULL;
- assert(!AvREAL(srcpad));
+ cloneall = param->flags & CLONEf_COPY_STACKS
+ || SvREFCNT(PadlistARRAY(srcpad)[1]) > 1;
+ assert (SvREFCNT(PadlistARRAY(srcpad)[1]) == 1);
+
+ max = cloneall ? PadlistMAX(srcpad) : 1;
+
+ Newx(dstpad, 1, PADLIST);
+ ptr_table_store(PL_ptr_table, srcpad, dstpad);
+ PadlistMAX(dstpad) = max;
+ Newx(PadlistARRAY(dstpad), max + 1, PAD *);
- if (param->flags & CLONEf_COPY_STACKS
- || SvREFCNT(AvARRAY(srcpad)[1]) > 1) {
- /* XXX padlists are real, but pretend to be not */
- AvREAL_on(srcpad);
- dstpad = av_dup_inc(srcpad, param);
- AvREAL_off(srcpad);
- AvREAL_off(dstpad);
- assert (SvREFCNT(AvARRAY(srcpad)[1]) == 1);
+ if (cloneall) {
+ PADOFFSET depth;
+ for (depth = 0; depth <= max; ++depth)
+ PadlistARRAY(dstpad)[depth] =
+ av_dup_inc(PadlistARRAY(srcpad)[depth], param);
} else {
/* CvDEPTH() on our subroutine will be set to 0, so there's no need
to build anything other than the first level of pads. */
-
- I32 ix = AvFILLp((const AV *)AvARRAY(srcpad)[1]);
+ I32 ix = AvFILLp(PadlistARRAY(srcpad)[1]);
AV *pad1;
- const I32 names_fill = AvFILLp((const AV *)(AvARRAY(srcpad)[0]));
- const AV *const srcpad1 = (const AV *) AvARRAY(srcpad)[1];
+ const I32 names_fill = AvFILLp(PadlistARRAY(srcpad)[0]);
+ const PAD *const srcpad1 = PadlistARRAY(srcpad)[1];
SV **oldpad = AvARRAY(srcpad1);
SV **names;
SV **pad1a;
AV *args;
- /* look for it in the table first.
- I *think* that it shouldn't be possible to find it there.
- Well, except for how Perl_sv_compile_2op() "works" :-( */
- dstpad = (AV*)ptr_table_fetch(PL_ptr_table, srcpad);
-
- if (dstpad)
- return dstpad;
- dstpad = newAV();
- ptr_table_store(PL_ptr_table, srcpad, dstpad);
- AvREAL_off(dstpad);
- av_extend(dstpad, 1);
- AvARRAY(dstpad)[0] = MUTABLE_SV(av_dup_inc(AvARRAY(srcpad)[0], param));
- names = AvARRAY(AvARRAY(dstpad)[0]);
+ PadlistARRAY(dstpad)[0] =
+ av_dup_inc(PadlistARRAY(srcpad)[0], param);
+ names = AvARRAY(PadlistARRAY(dstpad)[0]);
pad1 = newAV();
av_extend(pad1, ix);
- AvARRAY(dstpad)[1] = MUTABLE_SV(pad1);
+ PadlistARRAY(dstpad)[1] = pad1;
pad1a = AvARRAY(pad1);
- AvFILLp(dstpad) = 1;
if (ix > -1) {
AvFILLp(pad1) = ix;
return dstpad;
}
-#endif
+#endif /* USE_ITHREADS */
+
+PAD **
+Perl_padlist_store(pTHX_ register PADLIST *padlist, I32 key, PAD *val)
+{
+ dVAR;
+ PAD **ary;
+ SSize_t const oldmax = PadlistMAX(padlist);
+
+ PERL_ARGS_ASSERT_PADLIST_STORE;
+
+ assert(key >= 0);
+
+ if (key > PadlistMAX(padlist)) {
+ av_extend_guts(NULL,key,&PadlistMAX(padlist),
+ (SV ***)&PadlistARRAY(padlist),
+ (SV ***)&PadlistARRAY(padlist));
+ Zero(PadlistARRAY(padlist)+oldmax+1, PadlistMAX(padlist)-oldmax,
+ PAD *);
+ }
+ ary = PadlistARRAY(padlist);
+ SvREFCNT_dec(ary[key]);
+ ary[key] = val;
+ return &ary[key];
+}
/*
* Local variables:
* c-indentation-style: bsd
* c-basic-offset: 4
- * indent-tabs-mode: t
+ * indent-tabs-mode: nil
* End:
*
- * ex: set ts=8 sts=4 sw=4 noet:
+ * ex: set ts=8 sts=4 sw=4 et:
*/
https://perl5.git.perl.org / perl5.git / blobdiff