1 /* This file is part of the Variable::Magic Perl module.
2 * See http://search.cpan.org/dist/Variable-Magic/ */
4 #include <stdarg.h> /* <va_list>, va_{start,arg,end}, ... */
6 #include <stdio.h> /* sprintf() */
8 #define PERL_NO_GET_CONTEXT
13 #define __PACKAGE__ "Variable::Magic"
17 # define VOID2(T, P) static_cast<T>(P)
19 # define VOID2(T, P) (P)
22 #ifndef VMG_PERL_PATCHLEVEL
24 # define VMG_PERL_PATCHLEVEL PERL_PATCHNUM
26 # define VMG_PERL_PATCHLEVEL 0
30 #define VMG_HAS_PERL(R, V, S) (PERL_REVISION > (R) || (PERL_REVISION == (R) && (PERL_VERSION > (V) || (PERL_VERSION == (V) && (PERL_SUBVERSION >= (S))))))
32 #define VMG_HAS_PERL_BRANCH(R, V, S) (PERL_REVISION == (R) && PERL_VERSION == (V) && PERL_SUBVERSION >= (S))
34 #define VMG_HAS_PERL_MAINT(R, V, S, P) (PERL_REVISION == (R) && PERL_VERSION == (V) && (VMG_PERL_PATCHLEVEL >= (P) || (!VMG_PERL_PATCHLEVEL && PERL_SUBVERSION >= (S))))
36 /* --- Threads and multiplicity -------------------------------------------- */
46 /* Safe unless stated otherwise in Makefile.PL */
48 # define VMG_FORKSAFE 1
51 #ifndef VMG_MULTIPLICITY
52 # if defined(MULTIPLICITY)
53 # define VMG_MULTIPLICITY 1
55 # define VMG_MULTIPLICITY 0
59 # ifndef PERL_IMPLICIT_CONTEXT
60 # error MULTIPLICITY builds must set PERL_IMPLICIT_CONTEXT
64 #if VMG_MULTIPLICITY && defined(USE_ITHREADS) && defined(dMY_CXT) && defined(MY_CXT) && defined(START_MY_CXT) && defined(MY_CXT_INIT) && (defined(MY_CXT_CLONE) || defined(dMY_CXT_SV))
65 # ifndef VMG_THREADSAFE
66 # define VMG_THREADSAFE 1
69 # define MY_CXT_CLONE \
71 my_cxt_t *my_cxtp = (my_cxt_t*)SvPVX(newSV(sizeof(my_cxt_t)-1)); \
72 Copy(INT2PTR(my_cxt_t*, SvUV(my_cxt_sv)), my_cxtp, 1, my_cxt_t); \
73 sv_setuv(my_cxt_sv, PTR2UV(my_cxtp))
76 # undef VMG_THREADSAFE
77 # define VMG_THREADSAFE 0
79 # define dMY_CXT dNOOP
81 # define MY_CXT vmg_globaldata
83 # define START_MY_CXT STATIC my_cxt_t MY_CXT;
85 # define MY_CXT_INIT NOOP
87 # define MY_CXT_CLONE NOOP
91 # define VMG_LOCK(M) MUTEX_LOCK(M)
92 # define VMG_UNLOCK(M) MUTEX_UNLOCK(M)
95 # define VMG_UNLOCK(M)
98 /* --- Compatibility ------------------------------------------------------- */
101 # define Newx(v, n, c) New(0, v, n, c)
105 # define SvMAGIC_set(sv, val) (SvMAGIC(sv) = (val))
109 # define SvRV_const(sv) SvRV((SV *) sv)
112 #ifndef SvREFCNT_inc_simple_void
113 # define SvREFCNT_inc_simple_void(sv) ((void) SvREFCNT_inc(sv))
117 # define mPUSHu(U) PUSHs(sv_2mortal(newSVuv(U)))
120 #ifndef PERL_MAGIC_ext
121 # define PERL_MAGIC_ext '~'
124 #ifndef PERL_MAGIC_tied
125 # define PERL_MAGIC_tied 'P'
132 #ifndef IN_PERL_COMPILETIME
133 # define IN_PERL_COMPILETIME (PL_curcop == &PL_compiling)
137 # define OP_NAME(O) (PL_op_name[(O)->op_type])
141 # define OP_CLASS(O) (PL_opargs[(O)->op_type] & OA_CLASS_MASK)
145 # define VMG_ASSERT(C) assert(C)
147 # define VMG_ASSERT(C)
150 /* uvar magic and Hash::Util::FieldHash were commited with 28419, but we only
151 * enable them on 5.10 */
152 #if VMG_HAS_PERL(5, 10, 0)
158 #if VMG_HAS_PERL_MAINT(5, 11, 0, 32969) || VMG_HAS_PERL(5, 12, 0)
159 # define VMG_COMPAT_SCALAR_LENGTH_NOLEN 1
161 # define VMG_COMPAT_SCALAR_LENGTH_NOLEN 0
164 #if VMG_HAS_PERL(5, 17, 4)
165 # define VMG_COMPAT_SCALAR_NOLEN 1
167 # define VMG_COMPAT_SCALAR_NOLEN 0
170 /* Applied to dev-5.9 as 25854, integrated to maint-5.8 as 28160, partially
171 * reverted to dev-5.11 as 9cdcb38b */
172 #if VMG_HAS_PERL_MAINT(5, 8, 9, 28160) || VMG_HAS_PERL_MAINT(5, 9, 3, 25854) || VMG_HAS_PERL(5, 10, 0)
173 # ifndef VMG_COMPAT_ARRAY_PUSH_NOLEN
174 # if VMG_HAS_PERL(5, 11, 0)
175 # define VMG_COMPAT_ARRAY_PUSH_NOLEN 0
177 # define VMG_COMPAT_ARRAY_PUSH_NOLEN 1
180 # ifndef VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID
181 # define VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID 1
184 # ifndef VMG_COMPAT_ARRAY_PUSH_NOLEN
185 # define VMG_COMPAT_ARRAY_PUSH_NOLEN 0
187 # ifndef VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID
188 # define VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID 0
192 /* Applied to dev-5.11 as 34908 */
193 #if VMG_HAS_PERL_MAINT(5, 11, 0, 34908) || VMG_HAS_PERL(5, 12, 0)
194 # define VMG_COMPAT_ARRAY_UNSHIFT_NOLEN_VOID 1
196 # define VMG_COMPAT_ARRAY_UNSHIFT_NOLEN_VOID 0
199 /* Applied to dev-5.9 as 31473 (see #43357), integrated to maint-5.8 as 32542 */
200 #if VMG_HAS_PERL_MAINT(5, 8, 9, 32542) || VMG_HAS_PERL_MAINT(5, 9, 5, 31473) || VMG_HAS_PERL(5, 10, 0)
201 # define VMG_COMPAT_ARRAY_UNDEF_CLEAR 1
203 # define VMG_COMPAT_ARRAY_UNDEF_CLEAR 0
206 #if VMG_HAS_PERL(5, 11, 0)
207 # define VMG_COMPAT_HASH_DELETE_NOUVAR_VOID 1
209 # define VMG_COMPAT_HASH_DELETE_NOUVAR_VOID 0
212 #if VMG_HAS_PERL(5, 17, 0)
213 # define VMG_COMPAT_CODE_COPY_CLONE 1
215 # define VMG_COMPAT_CODE_COPY_CLONE 0
218 #if VMG_HAS_PERL(5, 13, 2)
219 # define VMG_COMPAT_GLOB_GET 1
221 # define VMG_COMPAT_GLOB_GET 0
224 #define VMG_PROPAGATE_ERRSV_NEEDS_TRAMPOLINE (VMG_HAS_PERL(5, 10, 0) && !VMG_HAS_PERL(5, 10, 1))
226 /* NewOp() isn't public in perl 5.8.0. */
227 #define VMG_RESET_RMG_NEEDS_TRAMPOLINE (VMG_UVAR && (VMG_THREADSAFE || !VMG_HAS_PERL(5, 8, 1)))
229 /* ... Bug-free mg_magical ................................................. */
231 /* See the discussion at http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2008-01/msg00036.html */
233 #if VMG_HAS_PERL(5, 11, 3)
235 #define vmg_mg_magical(S) mg_magical(S)
239 static void vmg_mg_magical(SV *sv) {
243 if ((mg = SvMAGIC(sv))) {
245 const MGVTBL* const vtbl = mg->mg_virtual;
247 if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP))
254 } while ((mg = mg->mg_moremagic));
255 if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)))
262 /* --- Trampoline ops ------------------------------------------------------ */
264 #define VMG_NEEDS_TRAMPOLINE VMG_PROPAGATE_ERRSV_NEEDS_TRAMPOLINE || VMG_RESET_RMG_NEEDS_TRAMPOLINE
266 #if VMG_NEEDS_TRAMPOLINE
273 static void vmg_trampoline_init(vmg_trampoline *t, OP *(*cb)(pTHX)) {
274 t->temp.op_type = OP_STUB;
275 t->temp.op_ppaddr = 0;
276 t->temp.op_next = (OP *) &t->target;
277 t->temp.op_flags = 0;
278 t->temp.op_private = 0;
280 t->target.op_type = OP_STUB;
281 t->target.op_ppaddr = cb;
282 t->target.op_next = NULL;
283 t->target.op_flags = 0;
284 t->target.op_private = 0;
285 t->target.op_sv = NULL;
288 static OP *vmg_trampoline_bump(pTHX_ vmg_trampoline *t, SV *sv, OP *o) {
289 #define vmg_trampoline_bump(T, S, O) vmg_trampoline_bump(aTHX_ (T), (S), (O))
291 t->temp.op_next = (OP *) &t->target;
293 t->target.op_sv = sv;
294 t->target.op_next = o->op_next;
299 #endif /* VMG_NEEDS_TRAMPOLINE */
301 /* --- Cleaner version of sv_magicext() ------------------------------------ */
303 static MAGIC *vmg_sv_magicext(pTHX_ SV *sv, SV *obj, const MGVTBL *vtbl, const void *ptr, I32 len) {
304 #define vmg_sv_magicext(S, O, V, P, L) vmg_sv_magicext(aTHX_ (S), (O), (V), (P), (L))
307 mg = sv_magicext(sv, obj, PERL_MAGIC_ext, vtbl, ptr, len);
314 mg->mg_flags |= MGf_COPY;
317 mg->mg_flags |= MGf_DUP;
321 mg->mg_flags |= MGf_LOCAL;
322 #endif /* MGf_LOCAL */
324 if (mg->mg_flags & MGf_REFCOUNTED)
330 /* --- Safe version of call_sv() ------------------------------------------- */
332 static I32 vmg_call_sv(pTHX_ SV *sv, I32 flags, int (*cleanup)(pTHX_ void *), void *ud) {
333 #define vmg_call_sv(S, F, C, U) vmg_call_sv(aTHX_ (S), (F), (C), (U))
335 PERL_CONTEXT saved_cx;
339 old_err = newSVsv(ERRSV);
340 sv_setsv(ERRSV, &PL_sv_undef);
343 cxix = (cxstack_ix < cxstack_max) ? (cxstack_ix + 1) : Perl_cxinc(aTHX);
344 /* The last popped context will be reused by call_sv(), but our callers may
345 * still need its previous value. Back it up so that it isn't clobbered. */
346 saved_cx = cxstack[cxix];
348 ret = call_sv(sv, flags | G_EVAL);
350 cxstack[cxix] = saved_cx;
353 SvREFCNT_dec(old_err);
355 if (IN_PERL_COMPILETIME) {
358 sv_catsv(PL_errors, ERRSV);
360 Perl_warn(aTHX_ "%s", SvPV_nolen(ERRSV));
363 #if VMG_HAS_PERL(5, 10, 0) || defined(PL_parser)
365 ++PL_parser->error_count;
366 #elif defined(PL_error_count)
372 if (!cleanup || cleanup(aTHX_ ud))
377 sv_setsv(ERRSV, old_err);
378 SvREFCNT_dec(old_err);
385 /* --- Stolen chunk of B --------------------------------------------------- */
400 #if VMG_HAS_PERL(5, 21, 5)
403 #if VMG_HAS_PERL(5, 21, 7)
409 static const char *const vmg_opclassnames[] = {
422 #if VMG_HAS_PERL(5, 21, 5)
425 #if VMG_HAS_PERL(5, 21, 7)
431 static opclass vmg_opclass(pTHX_ const OP *o) {
432 #define vmg_opclass(O) vmg_opclass(aTHX_ (O))
438 if (o->op_type == 0) {
439 #if VMG_HAS_PERL(5, 21, 7)
440 if (o->op_targ == OP_NEXTSTATE || o->op_targ == OP_DBSTATE)
443 return (o->op_flags & OPf_KIDS) ? OPc_UNOP : OPc_BASEOP;
446 if (o->op_type == OP_SASSIGN)
447 return ((o->op_private & OPpASSIGN_BACKWARDS) ? OPc_UNOP : OPc_BINOP);
449 if (o->op_type == OP_AELEMFAST) {
450 #if PERL_VERSION <= 14
451 if (o->op_flags & OPf_SPECIAL)
463 if (o->op_type == OP_GV || o->op_type == OP_GVSV || o->op_type == OP_RCATLINE)
467 switch (OP_CLASS(o)) {
484 case OA_PVOP_OR_SVOP:
486 #if VMG_HAS_PERL(5, 13, 7)
487 (o->op_type != OP_CUSTOM) &&
489 (o->op_private & (OPpTRANS_TO_UTF|OPpTRANS_FROM_UTF)))
490 #if defined(USE_ITHREADS) && VMG_HAS_PERL(5, 8, 9)
491 ? OPc_PADOP : OPc_PVOP;
493 ? OPc_SVOP : OPc_PVOP;
499 case OA_BASEOP_OR_UNOP:
500 return (o->op_flags & OPf_KIDS) ? OPc_UNOP : OPc_BASEOP;
502 return ((o->op_flags & OPf_KIDS) ? OPc_UNOP :
504 (o->op_flags & OPf_REF) ? OPc_PADOP : OPc_BASEOP);
506 (o->op_flags & OPf_REF) ? OPc_SVOP : OPc_BASEOP);
509 if (o->op_flags & OPf_STACKED)
511 else if (o->op_flags & OPf_SPECIAL)
515 #if VMG_HAS_PERL(5, 21, 5)
519 #if VMG_HAS_PERL(5, 21, 7)
528 /* --- Error messages ------------------------------------------------------ */
530 static const char vmg_invalid_wiz[] = "Invalid wizard object";
531 static const char vmg_wrongargnum[] = "Wrong number of arguments";
533 /* --- Context-safe global data -------------------------------------------- */
535 #define MY_CXT_KEY __PACKAGE__ "::_guts" XS_VERSION
538 HV *b__op_stashes[OPc_MAX];
541 #if VMG_PROPAGATE_ERRSV_NEEDS_TRAMPOLINE
542 vmg_trampoline propagate_errsv;
544 #if VMG_RESET_RMG_NEEDS_TRAMPOLINE
545 vmg_trampoline reset_rmg;
551 /* --- <vmg_vtable> structure ---------------------------------------------- */
560 static vmg_vtable *vmg_vtable_alloc(pTHX) {
561 #define vmg_vtable_alloc() vmg_vtable_alloc(aTHX)
564 t = VOID2(vmg_vtable *, PerlMemShared_malloc(sizeof *t));
566 t->vtbl = VOID2(MGVTBL *, PerlMemShared_malloc(sizeof *t->vtbl));
572 #define vmg_vtable_vtbl(T) (T)->vtbl
574 static perl_mutex vmg_vtable_refcount_mutex;
576 static vmg_vtable *vmg_vtable_dup(pTHX_ vmg_vtable *t) {
577 #define vmg_vtable_dup(T) vmg_vtable_dup(aTHX_ (T))
578 VMG_LOCK(&vmg_vtable_refcount_mutex);
580 VMG_UNLOCK(&vmg_vtable_refcount_mutex);
585 static void vmg_vtable_free(pTHX_ vmg_vtable *t) {
586 #define vmg_vtable_free(T) vmg_vtable_free(aTHX_ (T))
589 VMG_LOCK(&vmg_vtable_refcount_mutex);
590 refcount = --t->refcount;
591 VMG_UNLOCK(&vmg_vtable_refcount_mutex);
594 PerlMemShared_free(t->vtbl);
595 PerlMemShared_free(t);
599 #else /* VMG_THREADSAFE */
601 typedef MGVTBL vmg_vtable;
603 static vmg_vtable *vmg_vtable_alloc(pTHX) {
604 #define vmg_vtable_alloc() vmg_vtable_alloc(aTHX)
607 Newx(t, 1, vmg_vtable);
612 #define vmg_vtable_vtbl(T) ((MGVTBL *) (T))
614 #define vmg_vtable_free(T) Safefree(T)
616 #endif /* !VMG_THREADSAFE */
618 /* --- <vmg_wizard> structure ---------------------------------------------- */
627 SV *cb_get, *cb_set, *cb_len, *cb_clear, *cb_free;
632 #endif /* MGf_LOCAL */
634 SV *cb_fetch, *cb_store, *cb_exists, *cb_delete;
635 #endif /* VMG_UVAR */
638 static void vmg_op_info_init(pTHX_ unsigned int opinfo);
640 static vmg_wizard *vmg_wizard_alloc(pTHX_ UV opinfo) {
641 #define vmg_wizard_alloc(O) vmg_wizard_alloc(aTHX_ (O))
644 Newx(w, 1, vmg_wizard);
647 w->opinfo = (U8) ((opinfo < 255) ? opinfo : 255);
649 vmg_op_info_init(aTHX_ w->opinfo);
651 w->vtable = vmg_vtable_alloc();
656 static void vmg_wizard_free(pTHX_ vmg_wizard *w) {
657 #define vmg_wizard_free(W) vmg_wizard_free(aTHX_ (W))
661 /* During global destruction, any of the callbacks may already have been
662 * freed, so we can't rely on still being able to access them. */
664 SvREFCNT_dec(w->cb_data);
665 SvREFCNT_dec(w->cb_get);
666 SvREFCNT_dec(w->cb_set);
667 SvREFCNT_dec(w->cb_len);
668 SvREFCNT_dec(w->cb_clear);
669 SvREFCNT_dec(w->cb_free);
670 SvREFCNT_dec(w->cb_copy);
672 SvREFCNT_dec(w->cb_dup);
675 SvREFCNT_dec(w->cb_local);
676 #endif /* MGf_LOCAL */
678 SvREFCNT_dec(w->cb_fetch);
679 SvREFCNT_dec(w->cb_store);
680 SvREFCNT_dec(w->cb_exists);
681 SvREFCNT_dec(w->cb_delete);
682 #endif /* VMG_UVAR */
685 /* PerlMemShared_free() and Safefree() are still fine during global
686 * destruction though. */
687 vmg_vtable_free(w->vtable);
695 #define VMG_CLONE_CB(N) \
696 z->cb_ ## N = (w->cb_ ## N) ? SvREFCNT_inc(sv_dup(w->cb_ ## N, params)) \
699 static const vmg_wizard *vmg_wizard_dup(pTHX_ const vmg_wizard *w, CLONE_PARAMS *params) {
700 #define vmg_wizard_dup(W, P) vmg_wizard_dup(aTHX_ (W), (P))
706 Newx(z, 1, vmg_wizard);
708 z->vtable = vmg_vtable_dup(w->vtable);
710 z->opinfo = w->opinfo;
722 #endif /* MGf_LOCAL */
726 VMG_CLONE_CB(exists);
727 VMG_CLONE_CB(delete);
728 #endif /* VMG_UVAR */
733 #endif /* VMG_THREADSAFE */
735 #define vmg_wizard_id(W) PTR2IV(vmg_vtable_vtbl((W)->vtable))
737 /* --- Wizard SV objects --------------------------------------------------- */
739 static int vmg_wizard_sv_free(pTHX_ SV *sv, MAGIC *mg) {
740 vmg_wizard_free((vmg_wizard *) mg->mg_ptr);
747 static int vmg_wizard_sv_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *params) {
748 mg->mg_ptr = (char *) vmg_wizard_dup((const vmg_wizard *) mg->mg_ptr, params);
753 #endif /* VMG_THREADSAFE */
755 static MGVTBL vmg_wizard_sv_vtbl = {
760 vmg_wizard_sv_free, /* free */
763 vmg_wizard_sv_dup, /* dup */
769 #endif /* MGf_LOCAL */
772 static SV *vmg_wizard_sv_new(pTHX_ const vmg_wizard *w) {
773 #define vmg_wizard_sv_new(W) vmg_wizard_sv_new(aTHX_ (W))
779 wiz = newSViv(PTR2IV(w));
782 vmg_sv_magicext(wiz, NULL, &vmg_wizard_sv_vtbl, w, 0);
791 #define vmg_sv_has_wizard_type(S) (SvTYPE(S) >= SVt_PVMG)
793 static const vmg_wizard *vmg_wizard_from_sv_nocheck(const SV *wiz) {
796 for (mg = SvMAGIC(wiz); mg; mg = mg->mg_moremagic) {
797 if (mg->mg_type == PERL_MAGIC_ext && mg->mg_virtual == &vmg_wizard_sv_vtbl)
798 return (const vmg_wizard *) mg->mg_ptr;
804 #else /* VMG_THREADSAFE */
806 #define vmg_sv_has_wizard_type(S) SvIOK(S)
808 #define vmg_wizard_from_sv_nocheck(W) INT2PTR(const vmg_wizard *, SvIVX(W))
810 #endif /* !VMG_THREADSAFE */
812 #define vmg_wizard_from_sv(W) (vmg_sv_has_wizard_type(W) ? vmg_wizard_from_sv_nocheck(W) : NULL)
814 static const vmg_wizard *vmg_wizard_from_mg(const MAGIC *mg) {
815 if (mg->mg_type == PERL_MAGIC_ext && mg->mg_len == HEf_SVKEY) {
816 SV *sv = (SV *) mg->mg_ptr;
818 if (vmg_sv_has_wizard_type(sv))
819 return vmg_wizard_from_sv_nocheck(sv);
825 #define vmg_wizard_from_mg_nocheck(M) vmg_wizard_from_sv_nocheck((const SV *) (M)->mg_ptr)
827 /* --- User-level functions implementation --------------------------------- */
829 static const MAGIC *vmg_find(const SV *sv, const vmg_wizard *w) {
833 if (SvTYPE(sv) < SVt_PVMG)
836 wid = vmg_wizard_id(w);
838 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
839 const vmg_wizard *z = vmg_wizard_from_mg(mg);
841 if (z && vmg_wizard_id(z) == wid)
848 /* ... Construct private data .............................................. */
850 static SV *vmg_data_new(pTHX_ SV *ctor, SV *sv, SV **args, I32 items) {
851 #define vmg_data_new(C, S, A, I) vmg_data_new(aTHX_ (C), (S), (A), (I))
860 PUSHSTACKi(PERLSI_MAGIC);
863 EXTEND(SP, items + 1);
864 PUSHs(sv_2mortal(newRV_inc(sv)));
865 for (i = 0; i < items; ++i)
869 vmg_call_sv(ctor, G_SCALAR, 0, NULL);
873 #if VMG_HAS_PERL(5, 8, 3)
874 SvREFCNT_inc_simple_void(nsv); /* Or it will be destroyed in FREETMPS */
876 nsv = sv_newref(nsv); /* Workaround some bug in SvREFCNT_inc() */
888 static SV *vmg_data_get(pTHX_ SV *sv, const vmg_wizard *w) {
889 #define vmg_data_get(S, W) vmg_data_get(aTHX_ (S), (W))
890 const MAGIC *mg = vmg_find(sv, w);
892 return mg ? mg->mg_obj : NULL;
895 /* ... Magic cast/dispell .................................................. */
899 static I32 vmg_svt_val(pTHX_ IV, SV *);
902 struct ufuncs new_uf;
903 struct ufuncs old_uf;
906 #endif /* VMG_UVAR */
908 static void vmg_mg_del(pTHX_ SV *sv, MAGIC *prevmagic, MAGIC *mg, MAGIC *moremagic) {
909 #define vmg_mg_del(S, P, M, N) vmg_mg_del(aTHX_ (S), (P), (M), (N))
913 prevmagic->mg_moremagic = moremagic;
915 SvMAGIC_set(sv, moremagic);
917 /* Destroy private data */
919 if (mg->mg_type == PERL_MAGIC_uvar) {
920 Safefree(mg->mg_ptr);
922 #endif /* VMG_UVAR */
923 if (mg->mg_obj != sv) {
924 SvREFCNT_dec(mg->mg_obj);
927 /* Unreference the wizard */
928 SvREFCNT_dec((SV *) mg->mg_ptr);
932 #endif /* VMG_UVAR */
935 mg->mg_moremagic = MY_CXT.freed_tokens;
936 MY_CXT.freed_tokens = mg;
938 mg->mg_moremagic = NULL;
943 static int vmg_magic_chain_free(pTHX_ MAGIC *mg, MAGIC *skip) {
944 #define vmg_magic_chain_free(M, S) vmg_magic_chain_free(aTHX_ (M), (S))
948 MAGIC *moremagic = mg->mg_moremagic;
961 static UV vmg_cast(pTHX_ SV *sv, const vmg_wizard *w, const SV *wiz, SV **args, I32 items) {
962 #define vmg_cast(S, W, WIZ, A, I) vmg_cast(aTHX_ (S), (W), (WIZ), (A), (I))
971 oldgmg = SvGMAGICAL(sv);
973 data = (w->cb_data) ? vmg_data_new(w->cb_data, sv, args, items) : NULL;
975 t = vmg_vtable_vtbl(w->vtable);
976 mg = vmg_sv_magicext(sv, data, t, wiz, HEf_SVKEY);
978 if (SvTYPE(sv) < SVt_PVHV)
981 /* The GMAGICAL flag only says that a hash is tied or has uvar magic - get
982 * magic is actually never called for them. If the GMAGICAL flag was off before
983 * calling sv_magicext(), the hash isn't tied and has no uvar magic. If it's
984 * now on, then this wizard has get magic. Hence we can work around the
985 * get/clear shortcoming by turning the GMAGICAL flag off. If the current magic
986 * has uvar callbacks, it will be turned back on later. */
987 if (!oldgmg && SvGMAGICAL(sv))
992 MAGIC *prevmagic, *moremagic = NULL;
995 ud.new_uf.uf_val = vmg_svt_val;
996 ud.new_uf.uf_set = NULL;
997 ud.new_uf.uf_index = 0;
998 ud.old_uf.uf_val = NULL;
999 ud.old_uf.uf_set = NULL;
1000 ud.old_uf.uf_index = 0;
1002 /* One uvar magic in the chain is enough. */
1003 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic) {
1004 moremagic = mg->mg_moremagic;
1005 if (mg->mg_type == PERL_MAGIC_uvar)
1009 if (mg) { /* Found another uvar magic. */
1010 struct ufuncs *uf = (struct ufuncs *) mg->mg_ptr;
1011 if (uf->uf_val == vmg_svt_val) {
1012 /* It's our uvar magic, nothing to do. oldgmg was true. */
1015 /* It's another uvar magic, backup it and replace it by ours. */
1017 vmg_mg_del(sv, prevmagic, mg, moremagic);
1021 sv_magic(sv, NULL, PERL_MAGIC_uvar, (const char *) &ud, sizeof(ud));
1023 /* Our hash now carries uvar magic. The uvar/clear shortcoming has to be
1024 * handled by our uvar callback. */
1026 #endif /* VMG_UVAR */
1032 static UV vmg_dispell(pTHX_ SV *sv, const vmg_wizard *w) {
1033 #define vmg_dispell(S, W) vmg_dispell(aTHX_ (S), (W))
1036 #endif /* VMG_UVAR */
1037 MAGIC *mg, *prevmagic, *moremagic = NULL;
1038 IV wid = vmg_wizard_id(w);
1040 if (SvTYPE(sv) < SVt_PVMG)
1043 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic) {
1044 const vmg_wizard *z;
1046 moremagic = mg->mg_moremagic;
1048 z = vmg_wizard_from_mg(mg);
1050 IV zid = vmg_wizard_id(z);
1054 /* If the current has no uvar, short-circuit uvar deletion. */
1055 uvars = z->uvar ? (uvars + 1) : 0;
1057 } else if (z->uvar) {
1059 /* We can't break here since we need to find the ext magic to delete. */
1061 #else /* VMG_UVAR */
1064 #endif /* !VMG_UVAR */
1070 vmg_mg_del(sv, prevmagic, mg, moremagic);
1073 if (uvars == 1 && SvTYPE(sv) >= SVt_PVHV) {
1074 /* mg was the first ext magic in the chain that had uvar */
1076 for (mg = moremagic; mg; mg = mg->mg_moremagic) {
1077 const vmg_wizard *z = vmg_wizard_from_mg(mg);
1088 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic){
1089 moremagic = mg->mg_moremagic;
1090 if (mg->mg_type == PERL_MAGIC_uvar)
1094 ud = (vmg_uvar_ud *) mg->mg_ptr;
1095 if (ud->old_uf.uf_val || ud->old_uf.uf_set) {
1096 /* Revert the original uvar magic. */
1098 Newx(uf, 1, struct ufuncs);
1101 mg->mg_ptr = (char *) uf;
1102 mg->mg_len = sizeof(*uf);
1104 /* Remove the uvar magic. */
1105 vmg_mg_del(sv, prevmagic, mg, moremagic);
1109 #endif /* VMG_UVAR */
1116 /* ... OP info ............................................................. */
1118 #define VMG_OP_INFO_NAME 1
1119 #define VMG_OP_INFO_OBJECT 2
1122 static perl_mutex vmg_op_name_init_mutex;
1125 static U32 vmg_op_name_init = 0;
1126 static unsigned char vmg_op_name_len[MAXO] = { 0 };
1128 static void vmg_op_info_init(pTHX_ unsigned int opinfo) {
1129 #define vmg_op_info_init(W) vmg_op_info_init(aTHX_ (W))
1131 case VMG_OP_INFO_NAME:
1132 VMG_LOCK(&vmg_op_name_init_mutex);
1133 if (!vmg_op_name_init) {
1135 for (t = 0; t < OP_max; ++t)
1136 vmg_op_name_len[t] = strlen(PL_op_name[t]);
1137 vmg_op_name_init = 1;
1139 VMG_UNLOCK(&vmg_op_name_init_mutex);
1141 case VMG_OP_INFO_OBJECT: {
1143 if (!MY_CXT.b__op_stashes[0]) {
1146 for (c = OPc_NULL; c < OPc_MAX; ++c)
1147 MY_CXT.b__op_stashes[c] = gv_stashpv(vmg_opclassnames[c], 1);
1156 static SV *vmg_op_info(pTHX_ unsigned int opinfo) {
1157 #define vmg_op_info(W) vmg_op_info(aTHX_ (W))
1159 return &PL_sv_undef;
1162 case VMG_OP_INFO_NAME: {
1165 OPCODE t = PL_op->op_type;
1166 name = OP_NAME(PL_op);
1167 name_len = (t == OP_CUSTOM) ? strlen(name) : vmg_op_name_len[t];
1168 return sv_2mortal(newSVpvn(name, name_len));
1170 case VMG_OP_INFO_OBJECT: {
1172 return sv_bless(sv_2mortal(newRV_noinc(newSViv(PTR2IV(PL_op)))),
1173 MY_CXT.b__op_stashes[vmg_opclass(PL_op)]);
1179 return &PL_sv_undef;
1182 /* --- svt callbacks ------------------------------------------------------- */
1184 #define VMG_CB_CALL_ARGS_MASK 15
1185 #define VMG_CB_CALL_ARGS_SHIFT 4
1186 #define VMG_CB_CALL_OPINFO (VMG_OP_INFO_NAME|VMG_OP_INFO_OBJECT) /* 1|2 */
1187 #define VMG_CB_CALL_GUARD 4
1189 static int vmg_dispell_guard_oncroak(pTHX_ void *ud) {
1194 /* If we're at the upmost magic call and we're about to die, we can just free
1195 * the tokens right now, since we will jump past the problematic part of our
1197 if (MY_CXT.depth == 0 && MY_CXT.freed_tokens) {
1198 vmg_magic_chain_free(MY_CXT.freed_tokens, NULL);
1199 MY_CXT.freed_tokens = NULL;
1205 static int vmg_dispell_guard_free(pTHX_ SV *sv, MAGIC *mg) {
1206 vmg_magic_chain_free((MAGIC *) mg->mg_ptr, NULL);
1213 static int vmg_dispell_guard_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *params) {
1214 /* The freed magic tokens aren't cloned by perl because it cannot reach them
1215 * (they have been detached from their parent SV when they were enqueued).
1216 * Hence there's nothing to purge in the new thread. */
1222 #endif /* VMG_THREADSAFE */
1224 static MGVTBL vmg_dispell_guard_vtbl = {
1229 vmg_dispell_guard_free, /* free */
1232 vmg_dispell_guard_dup, /* dup */
1238 #endif /* MGf_LOCAL */
1241 static SV *vmg_dispell_guard_new(pTHX_ MAGIC *root) {
1242 #define vmg_dispell_guard_new(R) vmg_dispell_guard_new(aTHX_ (R))
1245 guard = sv_newmortal();
1246 vmg_sv_magicext(guard, NULL, &vmg_dispell_guard_vtbl, root, 0);
1251 static int vmg_cb_call(pTHX_ SV *cb, unsigned int flags, SV *sv, ...) {
1254 unsigned int i, args, opinfo;
1255 MAGIC **chain = NULL;
1260 args = flags & VMG_CB_CALL_ARGS_MASK;
1261 flags >>= VMG_CB_CALL_ARGS_SHIFT;
1262 opinfo = flags & VMG_CB_CALL_OPINFO;
1267 PUSHSTACKi(PERLSI_MAGIC);
1270 EXTEND(SP, args + 1);
1271 PUSHs(sv_2mortal(newRV_inc(sv)));
1273 for (i = 0; i < args; ++i) {
1274 SV *sva = va_arg(ap, SV *);
1275 PUSHs(sva ? sva : &PL_sv_undef);
1279 XPUSHs(vmg_op_info(opinfo));
1282 if (flags & VMG_CB_CALL_GUARD) {
1285 vmg_call_sv(cb, G_SCALAR, vmg_dispell_guard_oncroak, NULL);
1287 if (MY_CXT.depth == 0 && MY_CXT.freed_tokens)
1288 chain = &MY_CXT.freed_tokens;
1290 vmg_call_sv(cb, G_SCALAR, 0, NULL);
1296 ret = (int) SvIV(svr);
1308 if (svr && !SvTEMP(svr))
1312 vmg_dispell_guard_new(*chain);
1319 #define VMG_CB_FLAGS(OI, A) \
1320 ((((unsigned int) (OI)) << VMG_CB_CALL_ARGS_SHIFT) | (A))
1322 #define vmg_cb_call1(I, OI, S, A1) \
1323 vmg_cb_call(aTHX_ (I), VMG_CB_FLAGS((OI), 1), (S), (A1))
1324 #define vmg_cb_call2(I, OI, S, A1, A2) \
1325 vmg_cb_call(aTHX_ (I), VMG_CB_FLAGS((OI), 2), (S), (A1), (A2))
1326 #define vmg_cb_call3(I, OI, S, A1, A2, A3) \
1327 vmg_cb_call(aTHX_ (I), VMG_CB_FLAGS((OI), 3), (S), (A1), (A2), (A3))
1329 /* ... Default no-op magic callback ........................................ */
1331 static int vmg_svt_default_noop(pTHX_ SV *sv, MAGIC *mg) {
1335 /* ... get magic ........................................................... */
1337 static int vmg_svt_get(pTHX_ SV *sv, MAGIC *mg) {
1338 const vmg_wizard *w = vmg_wizard_from_mg_nocheck(mg);
1340 return vmg_cb_call1(w->cb_get, w->opinfo, sv, mg->mg_obj);
1343 #define vmg_svt_get_noop vmg_svt_default_noop
1345 /* ... set magic ........................................................... */
1347 static int vmg_svt_set(pTHX_ SV *sv, MAGIC *mg) {
1348 const vmg_wizard *w = vmg_wizard_from_mg_nocheck(mg);
1350 return vmg_cb_call1(w->cb_set, w->opinfo, sv, mg->mg_obj);
1353 #define vmg_svt_set_noop vmg_svt_default_noop
1355 /* ... len magic ........................................................... */
1357 static U32 vmg_sv_len(pTHX_ SV *sv) {
1358 #define vmg_sv_len(S) vmg_sv_len(aTHX_ (S))
1360 #if VMG_HAS_PERL(5, 9, 3)
1361 const U8 *s = VOID2(const U8 *, VOID2(const void *, SvPV_const(sv, len)));
1363 U8 *s = SvPV(sv, len);
1366 return DO_UTF8(sv) ? utf8_length(s, s + len) : len;
1369 static U32 vmg_svt_len(pTHX_ SV *sv, MAGIC *mg) {
1370 const vmg_wizard *w = vmg_wizard_from_mg_nocheck(mg);
1371 unsigned int opinfo = w->opinfo;
1374 svtype t = SvTYPE(sv);
1381 PUSHSTACKi(PERLSI_MAGIC);
1385 PUSHs(sv_2mortal(newRV_inc(sv)));
1386 PUSHs(mg->mg_obj ? mg->mg_obj : &PL_sv_undef);
1388 len = vmg_sv_len(sv);
1390 } else if (t == SVt_PVAV) {
1391 len = av_len((AV *) sv) + 1;
1395 PUSHs(&PL_sv_undef);
1398 XPUSHs(vmg_op_info(opinfo));
1401 vmg_call_sv(w->cb_len, G_SCALAR, 0, NULL);
1405 ret = SvOK(svr) ? (U32) SvUV(svr) : len;
1418 static U32 vmg_svt_len_noop(pTHX_ SV *sv, MAGIC *mg) {
1420 svtype t = SvTYPE(sv);
1423 len = vmg_sv_len(sv);
1424 } else if (t == SVt_PVAV) {
1425 len = (U32) av_len((AV *) sv);
1431 /* ... clear magic ......................................................... */
1433 static int vmg_svt_clear(pTHX_ SV *sv, MAGIC *mg) {
1434 const vmg_wizard *w = vmg_wizard_from_mg_nocheck(mg);
1435 unsigned int flags = w->opinfo;
1437 #if !VMG_HAS_PERL(5, 12, 0)
1438 flags |= VMG_CB_CALL_GUARD;
1441 return vmg_cb_call1(w->cb_clear, flags, sv, mg->mg_obj);
1444 #define vmg_svt_clear_noop vmg_svt_default_noop
1446 /* ... free magic .......................................................... */
1448 #if VMG_PROPAGATE_ERRSV_NEEDS_TRAMPOLINE
1450 static OP *vmg_pp_propagate_errsv(pTHX) {
1451 SVOP *o = cSVOPx(PL_op);
1454 sv_setsv(ERRSV, o->op_sv);
1455 SvREFCNT_dec(o->op_sv);
1462 #endif /* VMG_PROPAGATE_ERRSV_NEEDS_TRAMPOLINE */
1464 static int vmg_propagate_errsv_free(pTHX_ SV *sv, MAGIC *mg) {
1466 sv_setsv(ERRSV, mg->mg_obj);
1471 /* perl is already kind enough to handle the cloning of the mg_obj member,
1472 hence we don't need to define a dup magic callback. */
1474 static MGVTBL vmg_propagate_errsv_vtbl = {
1479 vmg_propagate_errsv_free, /* free */
1484 #endif /* MGf_LOCAL */
1491 } vmg_svt_free_cleanup_ud;
1493 static int vmg_svt_free_cleanup(pTHX_ void *ud_) {
1494 vmg_svt_free_cleanup_ud *ud = VOID2(vmg_svt_free_cleanup_ud *, ud_);
1497 U32 optype = PL_op ? PL_op->op_type : OP_NULL;
1499 if (optype == OP_LEAVETRY || optype == OP_LEAVEEVAL) {
1500 SV *errsv = newSVsv(ERRSV);
1503 LEAVE_SCOPE(ud->base);
1505 #if VMG_PROPAGATE_ERRSV_NEEDS_TRAMPOLINE
1506 if (optype == OP_LEAVETRY) {
1508 PL_op = vmg_trampoline_bump(&MY_CXT.propagate_errsv, errsv, PL_op);
1509 } else if (optype == OP_LEAVEEVAL) {
1510 SV *guard = sv_newmortal();
1511 vmg_sv_magicext(guard, errsv, &vmg_propagate_errsv_vtbl, NULL, 0);
1513 #else /* !VMG_PROPAGATE_ERRSV_NEEDS_TRAMPOLINE */
1514 # if !VMG_HAS_PERL(5, 8, 9)
1516 SV *guard = sv_newmortal();
1517 vmg_sv_magicext(guard, errsv, &vmg_propagate_errsv_vtbl, NULL, 0);
1520 vmg_sv_magicext(ERRSV, errsv, &vmg_propagate_errsv_vtbl, NULL, 0);
1522 #endif /* VMG_PROPAGATE_ERRSV_NEEDS_TRAMPOLINE */
1527 /* Don't propagate */
1533 /* We are about to croak() while sv is being destroyed. Try to clean up
1537 vmg_mg_del(sv, NULL, mg, mg->mg_moremagic);
1542 vmg_dispell_guard_oncroak(aTHX_ NULL);
1544 /* After that, propagate the error upwards. */
1549 static int vmg_svt_free(pTHX_ SV *sv, MAGIC *mg) {
1550 vmg_svt_free_cleanup_ud ud;
1551 const vmg_wizard *w;
1557 /* During global destruction, we cannot be sure that the wizard and its free
1558 * callback are still alive. */
1562 w = vmg_wizard_from_mg_nocheck(mg);
1564 /* So that it survives the temp cleanup below */
1565 SvREFCNT_inc_simple_void(sv);
1567 #if !(VMG_HAS_PERL_MAINT(5, 11, 0, 32686) || VMG_HAS_PERL(5, 12, 0))
1568 /* The previous magic tokens were freed but the magic chain wasn't updated, so
1569 * if you access the sv from the callback the old deleted magics will trigger
1570 * and cause memory misreads. Change 32686 solved it that way : */
1571 SvMAGIC_set(sv, mg);
1575 if (cxstack_ix < cxstack_max) {
1576 ud.in_eval = (CxTYPE(cxstack + cxstack_ix + 1) == CXt_EVAL);
1577 ud.base = ud.in_eval ? PL_scopestack[PL_scopestack_ix] : 0;
1586 PUSHSTACKi(PERLSI_MAGIC);
1590 PUSHs(sv_2mortal(newRV_inc(sv)));
1591 PUSHs(mg->mg_obj ? mg->mg_obj : &PL_sv_undef);
1593 XPUSHs(vmg_op_info(w->opinfo));
1599 vmg_call_sv(w->cb_free, G_SCALAR, vmg_svt_free_cleanup, &ud);
1601 if (MY_CXT.depth == 0 && MY_CXT.freed_tokens) {
1602 /* Free all the tokens in the chain but the current one (if it's present).
1603 * It will be taken care of by our caller, Perl_mg_free(). */
1604 vmg_magic_chain_free(MY_CXT.freed_tokens, mg);
1605 MY_CXT.freed_tokens = NULL;
1612 ret = (int) SvIV(svr);
1620 /* Calling SvREFCNT_dec() will trigger destructors in an infinite loop, so
1621 * we have to rely on SvREFCNT() being a lvalue. Heck, even the core does it */
1624 /* Perl_mg_free will get rid of the magic and decrement mg->mg_obj and
1625 * mg->mg_ptr reference count */
1629 #define vmg_svt_free_noop vmg_svt_default_noop
1631 #if VMG_HAS_PERL_MAINT(5, 11, 0, 33256) || VMG_HAS_PERL(5, 12, 0)
1632 # define VMG_SVT_COPY_KEYLEN_TYPE I32
1634 # define VMG_SVT_COPY_KEYLEN_TYPE int
1637 /* ... copy magic .......................................................... */
1639 static int vmg_svt_copy(pTHX_ SV *sv, MAGIC *mg, SV *nsv, const char *key, VMG_SVT_COPY_KEYLEN_TYPE keylen) {
1640 const vmg_wizard *w = vmg_wizard_from_mg_nocheck(mg);
1644 if (keylen == HEf_SVKEY) {
1647 keysv = newSVpvn(key, keylen);
1650 if (SvTYPE(sv) >= SVt_PVCV)
1651 nsv = sv_2mortal(newRV_inc(nsv));
1653 ret = vmg_cb_call3(w->cb_copy, w->opinfo, sv, mg->mg_obj, keysv, nsv);
1655 if (keylen != HEf_SVKEY) {
1656 SvREFCNT_dec(keysv);
1662 static int vmg_svt_copy_noop(pTHX_ SV *sv, MAGIC *mg, SV *nsv, const char *key, VMG_SVT_COPY_KEYLEN_TYPE keylen) {
1666 /* ... dup magic ........................................................... */
1669 static int vmg_svt_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *param) {
1672 #define vmg_svt_dup_noop vmg_svt_dup
1675 /* ... local magic ......................................................... */
1679 static int vmg_svt_local(pTHX_ SV *nsv, MAGIC *mg) {
1680 const vmg_wizard *w = vmg_wizard_from_mg_nocheck(mg);
1682 return vmg_cb_call1(w->cb_local, w->opinfo, nsv, mg->mg_obj);
1685 #define vmg_svt_local_noop vmg_svt_default_noop
1687 #endif /* MGf_LOCAL */
1689 /* ... uvar magic .......................................................... */
1693 static OP *vmg_pp_reset_rmg(pTHX) {
1694 SVOP *o = cSVOPx(PL_op);
1696 SvRMAGICAL_on(o->op_sv);
1702 static I32 vmg_svt_val(pTHX_ IV action, SV *sv) {
1704 MAGIC *mg, *umg, *moremagic;
1705 SV *key = NULL, *newkey = NULL;
1708 umg = mg_find(sv, PERL_MAGIC_uvar);
1709 /* umg can't be NULL or we wouldn't be there. */
1711 ud = (vmg_uvar_ud *) umg->mg_ptr;
1713 if (ud->old_uf.uf_val)
1714 ud->old_uf.uf_val(aTHX_ action, sv);
1715 if (ud->old_uf.uf_set)
1716 ud->old_uf.uf_set(aTHX_ action, sv);
1718 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
1719 const vmg_wizard *w;
1721 /* mg may be freed later by the uvar call, so we need to fetch the next
1722 * token before reaching that fateful point. */
1723 moremagic = mg->mg_moremagic;
1725 switch (mg->mg_type) {
1726 case PERL_MAGIC_ext:
1728 case PERL_MAGIC_tied:
1735 w = vmg_wizard_from_mg(mg);
1744 newkey = key = umg->mg_obj = sv_mortalcopy(umg->mg_obj);
1748 & (HV_FETCH_ISSTORE|HV_FETCH_ISEXISTS|HV_FETCH_LVALUE|HV_DELETE)) {
1751 vmg_cb_call2(w->cb_fetch, w->opinfo | VMG_CB_CALL_GUARD, sv,
1754 case HV_FETCH_ISSTORE:
1755 case HV_FETCH_LVALUE:
1756 case (HV_FETCH_ISSTORE|HV_FETCH_LVALUE):
1758 vmg_cb_call2(w->cb_store, w->opinfo | VMG_CB_CALL_GUARD, sv,
1761 case HV_FETCH_ISEXISTS:
1763 vmg_cb_call2(w->cb_exists, w->opinfo | VMG_CB_CALL_GUARD, sv,
1768 vmg_cb_call2(w->cb_delete, w->opinfo | VMG_CB_CALL_GUARD, sv,
1774 if (SvRMAGICAL(sv) && !tied && !(action & (HV_FETCH_ISSTORE|HV_DELETE))) {
1775 /* Temporarily hide the RMAGICAL flag of the hash so it isn't wrongly
1776 * mistaken for a tied hash by the rest of hv_common. It will be reset by
1777 * the op_ppaddr of a new fake op injected between the current and the next
1780 #if VMG_RESET_RMG_NEEDS_TRAMPOLINE
1784 PL_op = vmg_trampoline_bump(&MY_CXT.reset_rmg, sv, PL_op);
1786 #else /* !VMG_RESET_RMG_NEEDS_TRAMPOLINE */
1788 OP *nop = PL_op->op_next;
1791 if (nop && nop->op_ppaddr == vmg_pp_reset_rmg) {
1792 svop = (SVOP *) nop;
1794 NewOp(1101, svop, 1, SVOP);
1795 svop->op_type = OP_STUB;
1796 svop->op_ppaddr = vmg_pp_reset_rmg;
1797 svop->op_next = nop;
1799 svop->op_private = 0;
1801 PL_op->op_next = (OP *) svop;
1806 #endif /* VMG_RESET_RMG_NEEDS_TRAMPOLINE */
1814 #endif /* VMG_UVAR */
1816 /* --- Module setup/teardown ----------------------------------------------- */
1820 static I32 vmg_loaded = 0;
1822 /* We must use preexistent global mutexes or we will never be able to destroy
1824 # if VMG_HAS_PERL(5, 9, 3)
1825 # define VMG_LOADED_LOCK MUTEX_LOCK(&PL_my_ctx_mutex)
1826 # define VMG_LOADED_UNLOCK MUTEX_UNLOCK(&PL_my_ctx_mutex)
1828 # define VMG_LOADED_LOCK OP_REFCNT_LOCK
1829 # define VMG_LOADED_UNLOCK OP_REFCNT_UNLOCK
1832 static void vmg_global_teardown_late_locked(pTHX) {
1833 #define vmg_global_teardown_late_locked() vmg_global_teardown_late_locked(aTHX)
1834 MUTEX_DESTROY(&vmg_op_name_init_mutex);
1835 MUTEX_DESTROY(&vmg_vtable_refcount_mutex);
1840 static int vmg_global_teardown_free(pTHX_ SV *sv, MAGIC *mg) {
1843 if (vmg_loaded == 0)
1844 vmg_global_teardown_late_locked();
1851 static MGVTBL vmg_global_teardown_vtbl = {
1856 vmg_global_teardown_free
1868 static signed char vmg_destruct_level(pTHX) {
1869 #define vmg_destruct_level() vmg_destruct_level(aTHX)
1872 lvl = PL_perl_destruct_level;
1876 const char *s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1879 #if VMG_HAS_PERL(5, 21, 3)
1880 if (strEQ(s, "-1")) {
1883 # if VMG_HAS_PERL(5, 21, 10)
1885 if (Perl_grok_atoUV(s, &uv, NULL) && uv <= INT_MAX)
1889 # else /* VMG_HAS_PERL(5, 21, 3) && !VMG_HAS_PERL(5, 21, 10) */
1890 i = Perl_grok_atou(s, NULL);
1893 #else /* !VMG_HAS_PERL(5, 21, 3) */
1905 #endif /* VMG_THREADSAFE */
1907 static void vmg_teardown(pTHX_ void *param) {
1913 if (vmg_loaded == 1) {
1915 if (vmg_destruct_level() == 0) {
1916 vmg_global_teardown_late_locked();
1919 PL_strtab = newHV();
1920 vmg_sv_magicext((SV *) PL_strtab, NULL, &vmg_global_teardown_vtbl, NULL, 0);
1923 VMG_ASSERT(vmg_loaded > 1);
1930 if (MY_CXT.depth == 0 && MY_CXT.freed_tokens) {
1931 vmg_magic_chain_free(MY_CXT.freed_tokens, NULL);
1932 MY_CXT.freed_tokens = NULL;
1938 static void vmg_setup(pTHX) {
1939 #define vmg_setup() vmg_setup(aTHX)
1947 if (vmg_loaded == 0) {
1948 MUTEX_INIT(&vmg_vtable_refcount_mutex);
1949 MUTEX_INIT(&vmg_op_name_init_mutex);
1952 VMG_ASSERT(vmg_loaded > 0);
1959 for (c = OPc_NULL; c < OPc_MAX; ++c)
1960 MY_CXT.b__op_stashes[c] = NULL;
1963 MY_CXT.freed_tokens = NULL;
1965 #if VMG_PROPAGATE_ERRSV_NEEDS_TRAMPOLINE
1966 vmg_trampoline_init(&MY_CXT.propagate_errsv, vmg_pp_propagate_errsv);
1968 #if VMG_RESET_RMG_NEEDS_TRAMPOLINE
1969 vmg_trampoline_init(&MY_CXT.reset_rmg, vmg_pp_reset_rmg);
1972 stash = gv_stashpv(__PACKAGE__, 1);
1973 newCONSTSUB(stash, "MGf_COPY", newSVuv(MGf_COPY));
1974 newCONSTSUB(stash, "MGf_DUP", newSVuv(MGf_DUP));
1975 newCONSTSUB(stash, "MGf_LOCAL", newSVuv(MGf_LOCAL));
1976 newCONSTSUB(stash, "VMG_UVAR", newSVuv(VMG_UVAR));
1977 newCONSTSUB(stash, "VMG_COMPAT_SCALAR_LENGTH_NOLEN",
1978 newSVuv(VMG_COMPAT_SCALAR_LENGTH_NOLEN));
1979 newCONSTSUB(stash, "VMG_COMPAT_SCALAR_NOLEN",
1980 newSVuv(VMG_COMPAT_SCALAR_NOLEN));
1981 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_PUSH_NOLEN",
1982 newSVuv(VMG_COMPAT_ARRAY_PUSH_NOLEN));
1983 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID",
1984 newSVuv(VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID));
1985 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_UNSHIFT_NOLEN_VOID",
1986 newSVuv(VMG_COMPAT_ARRAY_UNSHIFT_NOLEN_VOID));
1987 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_UNDEF_CLEAR",
1988 newSVuv(VMG_COMPAT_ARRAY_UNDEF_CLEAR));
1989 newCONSTSUB(stash, "VMG_COMPAT_HASH_DELETE_NOUVAR_VOID",
1990 newSVuv(VMG_COMPAT_HASH_DELETE_NOUVAR_VOID));
1991 newCONSTSUB(stash, "VMG_COMPAT_CODE_COPY_CLONE",
1992 newSVuv(VMG_COMPAT_CODE_COPY_CLONE));
1993 newCONSTSUB(stash, "VMG_COMPAT_GLOB_GET", newSVuv(VMG_COMPAT_GLOB_GET));
1994 newCONSTSUB(stash, "VMG_PERL_PATCHLEVEL", newSVuv(VMG_PERL_PATCHLEVEL));
1995 newCONSTSUB(stash, "VMG_THREADSAFE", newSVuv(VMG_THREADSAFE));
1996 newCONSTSUB(stash, "VMG_FORKSAFE", newSVuv(VMG_FORKSAFE));
1997 newCONSTSUB(stash, "VMG_OP_INFO_NAME", newSVuv(VMG_OP_INFO_NAME));
1998 newCONSTSUB(stash, "VMG_OP_INFO_OBJECT", newSVuv(VMG_OP_INFO_OBJECT));
2000 call_atexit(vmg_teardown, NULL);
2005 /* --- Macros for the XS section ------------------------------------------- */
2008 # define VMG_CVOK(C) \
2009 ((CvISXSUB(C) ? (void *) CvXSUB(C) : (void *) CvROOT(C)) ? 1 : 0)
2011 # define VMG_CVOK(C) (CvROOT(C) || CvXSUB(C))
2014 #define VMG_CBOK(S) ((SvTYPE(S) == SVt_PVCV) ? VMG_CVOK(S) : SvOK(S))
2016 #define VMG_SET_CB(S, N) { \
2018 if (SvOK(cb) && SvROK(cb)) { \
2021 SvREFCNT_inc_simple_void(cb); \
2030 #define VMG_SET_SVT_CB(S, N) { \
2032 if (SvOK(cb) && SvROK(cb)) { \
2034 if (VMG_CBOK(cb)) { \
2035 t->svt_ ## N = vmg_svt_ ## N; \
2036 SvREFCNT_inc_simple_void(cb); \
2038 t->svt_ ## N = vmg_svt_ ## N ## _noop; \
2042 t->svt_ ## N = NULL; \
2048 /* --- XS ------------------------------------------------------------------ */
2050 MODULE = Variable::Magic PACKAGE = Variable::Magic
2065 U32 had_b__op_stash = 0;
2071 for (c = OPc_NULL; c < OPc_MAX; ++c) {
2072 if (MY_CXT.b__op_stashes[c])
2073 had_b__op_stash |= (((U32) 1) << c);
2075 old_depth = MY_CXT.depth;
2079 for (c = OPc_NULL; c < OPc_MAX; ++c) {
2080 MY_CXT.b__op_stashes[c] = (had_b__op_stash & (((U32) 1) << c))
2081 ? gv_stashpv(vmg_opclassnames[c], 1) : NULL;
2083 MY_CXT.depth = old_depth;
2084 MY_CXT.freed_tokens = NULL;
2086 VMG_ASSERT(vmg_loaded > 0);
2092 #endif /* VMG_THREADSAFE */
2099 SV *op_info, *copy_key;
2105 #endif /* MGf_LOCAL */
2108 #endif /* VMG_UVAR */
2109 ) { croak(vmg_wrongargnum); }
2112 w = vmg_wizard_alloc(SvOK(op_info) ? SvUV(op_info) : 0);
2113 t = vmg_vtable_vtbl(w->vtable);
2115 VMG_SET_CB(ST(i++), data);
2117 VMG_SET_SVT_CB(ST(i++), get);
2118 VMG_SET_SVT_CB(ST(i++), set);
2119 VMG_SET_SVT_CB(ST(i++), len);
2120 VMG_SET_SVT_CB(ST(i++), clear);
2121 VMG_SET_SVT_CB(ST(i++), free);
2122 VMG_SET_SVT_CB(ST(i++), copy);
2123 /* VMG_SET_SVT_CB(ST(i++), dup); */
2128 VMG_SET_SVT_CB(ST(i++), local);
2129 #endif /* MGf_LOCAL */
2131 VMG_SET_CB(ST(i++), fetch);
2132 VMG_SET_CB(ST(i++), store);
2133 VMG_SET_CB(ST(i++), exists);
2134 VMG_SET_CB(ST(i++), delete);
2137 if (w->cb_fetch || w->cb_store || w->cb_exists || w->cb_delete)
2138 w->uvar = SvTRUE(copy_key) ? 2 : 1;
2139 #endif /* VMG_UVAR */
2141 RETVAL = newRV_noinc(vmg_wizard_sv_new(w));
2145 SV *cast(SV *sv, SV *wiz, ...)
2146 PROTOTYPE: \[$@%&*]$@
2148 const vmg_wizard *w = NULL;
2157 wiz = SvRV_const(wiz);
2158 w = vmg_wizard_from_sv(wiz);
2161 croak(vmg_invalid_wiz);
2162 RETVAL = newSVuv(vmg_cast(SvRV(sv), w, wiz, args, i));
2167 getdata(SV *sv, SV *wiz)
2168 PROTOTYPE: \[$@%&*]$
2170 const vmg_wizard *w = NULL;
2174 w = vmg_wizard_from_sv(SvRV_const(wiz));
2176 croak(vmg_invalid_wiz);
2177 data = vmg_data_get(SvRV(sv), w);
2183 SV *dispell(SV *sv, SV *wiz)
2184 PROTOTYPE: \[$@%&*]$
2186 const vmg_wizard *w = NULL;
2189 w = vmg_wizard_from_sv(SvRV_const(wiz));
2191 croak(vmg_invalid_wiz);
2192 RETVAL = newSVuv(vmg_dispell(SvRV(sv), w));