1 /* This file is part of the autovivification Perl module.
2 * See http://search.cpan.org/dist/autovivification/ */
4 #define PERL_NO_GET_CONTEXT
9 #define __PACKAGE__ "autovivification"
10 #define __PACKAGE_LEN__ (sizeof(__PACKAGE__)-1)
12 /* --- Compatibility wrappers ---------------------------------------------- */
15 # define HvNAME_get(H) HvNAME(H)
19 # define HvNAMELEN_get(H) strlen(HvNAME_get(H))
22 #define A_HAS_PERL(R, V, S) (PERL_REVISION > (R) || (PERL_REVISION == (R) && (PERL_VERSION > (V) || (PERL_VERSION == (V) && (PERL_SUBVERSION >= (S))))))
25 #if defined(ENTER_with_name) && !A_HAS_PERL(5, 11, 4)
26 # define ENTERn(N) ENTER_with_name(N)
28 # define ENTERn(N) ENTER
32 #if defined(LEAVE_with_name) && !A_HAS_PERL(5, 11, 4)
33 # define LEAVEn(N) LEAVE_with_name(N)
35 # define LEAVEn(N) LEAVE
38 #ifndef A_WORKAROUND_REQUIRE_PROPAGATION
39 # define A_WORKAROUND_REQUIRE_PROPAGATION !A_HAS_PERL(5, 10, 1)
43 # define A_HAS_RPEEP A_HAS_PERL(5, 13, 5)
46 /* ... Thread safety and multiplicity ...................................... */
48 /* Always safe when the workaround isn't needed */
49 #if !A_WORKAROUND_REQUIRE_PROPAGATION
52 /* Otherwise, safe unless Makefile.PL says it's Win32 */
53 #elif !defined(A_FORKSAFE)
57 #ifndef A_MULTIPLICITY
58 # if defined(MULTIPLICITY) || defined(PERL_IMPLICIT_CONTEXT)
59 # define A_MULTIPLICITY 1
61 # define A_MULTIPLICITY 0
66 # define tTHX PerlInterpreter*
69 #if A_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))
70 # define A_THREADSAFE 1
72 # define MY_CXT_CLONE \
74 my_cxt_t *my_cxtp = (my_cxt_t*)SvPVX(newSV(sizeof(my_cxt_t)-1)); \
75 Copy(INT2PTR(my_cxt_t*, SvUV(my_cxt_sv)), my_cxtp, 1, my_cxt_t); \
76 sv_setuv(my_cxt_sv, PTR2UV(my_cxtp))
79 # define A_THREADSAFE 0
81 # define dMY_CXT dNOOP
83 # define MY_CXT a_globaldata
85 # define START_MY_CXT STATIC my_cxt_t MY_CXT;
87 # define MY_CXT_INIT NOOP
89 # define MY_CXT_CLONE NOOP
92 /* --- Helpers ------------------------------------------------------------- */
94 /* ... Thread-safe hints ................................................... */
96 #if A_WORKAROUND_REQUIRE_PROPAGATION
103 #define A_HINT_FREE(H) PerlMemShared_free(H)
107 #define PTABLE_NAME ptable_hints
108 #define PTABLE_VAL_FREE(V) A_HINT_FREE(V)
117 #define ptable_hints_store(T, K, V) ptable_hints_store(aTHX_ (T), (K), (V))
118 #define ptable_hints_free(T) ptable_hints_free(aTHX_ (T))
120 #endif /* A_THREADSAFE */
122 #endif /* A_WORKAROUND_REQUIRE_PROPAGATION */
126 #define PTABLE_NAME ptable_seen
127 #define PTABLE_VAL_FREE(V) NOOP
131 #endif /* !A_HAS_RPEEP */
133 #define A_NEED_CXT ((A_THREADSAFE && A_WORKAROUND_REQUIRE_PROPAGATION) || !A_HAS_RPEEP)
137 #define MY_CXT_KEY __PACKAGE__ "::_guts" XS_VERSION
140 #if A_THREADSAFE && A_WORKAROUND_REQUIRE_PROPAGATION
141 ptable *tbl; /* It really is a ptable_hints */
143 #endif /* A_THREADSAFE && A_WORKAROUND_REQUIRE_PROPAGATION */
145 ptable *seen; /* It really is a ptable_seen */
146 #endif /* !A_HAS_RPEEP */
153 #if A_WORKAROUND_REQUIRE_PROPAGATION
157 #if A_HAS_PERL(5, 13, 2)
158 CLONE_PARAMS *params;
164 #if A_HAS_PERL(5, 13, 2)
165 # define a_ptable_clone_ud_init(U, T, O) \
167 (U).params = Perl_clone_params_new((O), aTHX)
168 # define a_ptable_clone_ud_deinit(U) Perl_clone_params_del((U).params)
169 # define a_dup_inc(S, U) SvREFCNT_inc(sv_dup((S), (U)->params))
171 # define a_ptable_clone_ud_init(U, T, O) \
173 (U).params.stashes = newAV(); \
174 (U).params.flags = 0; \
175 (U).params.proto_perl = (O)
176 # define a_ptable_clone_ud_deinit(U) SvREFCNT_dec((U).params.stashes)
177 # define a_dup_inc(S, U) SvREFCNT_inc(sv_dup((S), &((U)->params)))
180 STATIC void a_ptable_clone(pTHX_ ptable_ent *ent, void *ud_) {
181 a_ptable_clone_ud *ud = ud_;
182 a_hint_t *h1 = ent->val;
185 h2 = PerlMemShared_malloc(sizeof *h2);
187 h2->require_tag = PTR2IV(a_dup_inc(INT2PTR(SV *, h1->require_tag), ud));
189 ptable_hints_store(ud->tbl, ent->key, h2);
192 #endif /* A_WORKAROUND_REQUIRE_PROPAGATION */
196 STATIC void a_thread_cleanup(pTHX_ void *ud) {
199 #if A_WORKAROUND_REQUIRE_PROPAGATION
200 ptable_hints_free(MY_CXT.tbl);
201 #endif /* A_WORKAROUND_REQUIRE_PROPAGATION */
203 ptable_seen_free(MY_CXT.seen);
204 #endif /* !A_HAS_RPEEP */
207 #endif /* A_THREADSAFE */
209 #endif /* A_NEED_CXT */
211 #if A_WORKAROUND_REQUIRE_PROPAGATION
213 STATIC IV a_require_tag(pTHX) {
214 #define a_require_tag() a_require_tag(aTHX)
215 const CV *cv, *outside;
220 /* If for some reason the pragma is operational at run-time, try to discover
221 * the current cv in use. */
224 for (si = PL_curstackinfo; si; si = si->si_prev) {
227 for (cxix = si->si_cxix; cxix >= 0; --cxix) {
228 const PERL_CONTEXT *cx = si->si_cxstack + cxix;
230 switch (CxTYPE(cx)) {
233 /* The propagation workaround is only needed up to 5.10.0 and at that
234 * time format and sub contexts were still identical. And even later the
235 * cv members offsets should have been kept the same. */
237 goto get_enclosing_cv;
239 cv = cx->blk_eval.cv;
240 goto get_enclosing_cv;
251 for (outside = CvOUTSIDE(cv); outside; outside = CvOUTSIDE(cv))
257 STATIC SV *a_tag(pTHX_ UV bits) {
258 #define a_tag(B) a_tag(aTHX_ (B))
264 h = PerlMemShared_malloc(sizeof *h);
266 h->require_tag = a_require_tag();
269 /* We only need for the key to be an unique tag for looking up the value later.
270 * Allocated memory provides convenient unique identifiers, so that's why we
271 * use the hint as the key itself. */
272 ptable_hints_store(MY_CXT.tbl, h, h);
273 #endif /* A_THREADSAFE */
275 return newSViv(PTR2IV(h));
278 STATIC UV a_detag(pTHX_ const SV *hint) {
279 #define a_detag(H) a_detag(aTHX_ (H))
285 if (!(hint && SvIOK(hint)))
288 h = INT2PTR(a_hint_t *, SvIVX(hint));
290 h = ptable_fetch(MY_CXT.tbl, h);
291 #endif /* A_THREADSAFE */
293 if (a_require_tag() != h->require_tag)
299 #else /* A_WORKAROUND_REQUIRE_PROPAGATION */
301 #define a_tag(B) newSVuv(B)
302 /* PVs fetched from the hints chain have their SvLEN set to zero, so get the UV
309 ? sv_2uv(SvLEN(H) ? (H) : sv_mortalcopy(H)) \
315 #endif /* !A_WORKAROUND_REQUIRE_PROPAGATION */
317 /* Used both for hints and op flags */
318 #define A_HINT_STRICT 1
319 #define A_HINT_WARN 2
320 #define A_HINT_FETCH 4
321 #define A_HINT_STORE 8
322 #define A_HINT_EXISTS 16
323 #define A_HINT_DELETE 32
324 #define A_HINT_NOTIFY (A_HINT_STRICT|A_HINT_WARN)
325 #define A_HINT_DO (A_HINT_FETCH|A_HINT_STORE|A_HINT_EXISTS|A_HINT_DELETE)
326 #define A_HINT_MASK (A_HINT_NOTIFY|A_HINT_DO)
328 /* Only used in op flags */
329 #define A_HINT_ROOT 64
330 #define A_HINT_DEREF 128
332 STATIC U32 a_hash = 0;
334 STATIC UV a_hint(pTHX) {
335 #define a_hint() a_hint(aTHX)
337 #ifdef cop_hints_fetch_pvn
338 hint = cop_hints_fetch_pvn(PL_curcop, __PACKAGE__, __PACKAGE_LEN__, a_hash, 0);
339 #elif A_HAS_PERL(5, 9, 5)
340 hint = Perl_refcounted_he_fetch(aTHX_ PL_curcop->cop_hints_hash,
342 __PACKAGE__, __PACKAGE_LEN__,
346 SV **val = hv_fetch(GvHV(PL_hintgv), __PACKAGE__, __PACKAGE_LEN__, a_hash);
351 return a_detag(hint);
354 /* ... op => info map ...................................................... */
362 #define PTABLE_NAME ptable_map
363 #define PTABLE_VAL_FREE(V) PerlMemShared_free(V)
367 /* PerlMemShared_free() needs the [ap]PTBLMS_? default values */
368 #define ptable_map_store(T, K, V) ptable_map_store(aPTBLMS_ (T), (K), (V))
370 STATIC ptable *a_op_map = NULL;
374 #define dA_MAP_THX a_op_info a_op_map_tmp_oi
376 STATIC perl_mutex a_op_map_mutex;
378 #define A_LOCK(M) MUTEX_LOCK(M)
379 #define A_UNLOCK(M) MUTEX_UNLOCK(M)
381 STATIC const a_op_info *a_map_fetch(const OP *o, a_op_info *oi) {
382 const a_op_info *val;
384 A_LOCK(&a_op_map_mutex);
386 val = ptable_fetch(a_op_map, o);
392 A_UNLOCK(&a_op_map_mutex);
397 #define a_map_fetch(O) a_map_fetch((O), &a_op_map_tmp_oi)
399 #else /* USE_ITHREADS */
401 #define dA_MAP_THX dNOOP
403 #define A_LOCK(M) NOOP
404 #define A_UNLOCK(M) NOOP
406 #define a_map_fetch(O) ptable_fetch(a_op_map, (O))
408 #endif /* !USE_ITHREADS */
410 STATIC const a_op_info *a_map_store_locked(pPTBLMS_ const OP *o, OP *(*old_pp)(pTHX), void *next, UV flags) {
411 #define a_map_store_locked(O, PP, N, F) a_map_store_locked(aPTBLMS_ (O), (PP), (N), (F))
414 if (!(oi = ptable_fetch(a_op_map, o))) {
415 oi = PerlMemShared_malloc(sizeof *oi);
416 ptable_map_store(a_op_map, o, oi);
426 STATIC void a_map_store(pPTBLMS_ const OP *o, OP *(*old_pp)(pTHX), void *next, UV flags) {
427 #define a_map_store(O, PP, N, F) a_map_store(aPTBLMS_ (O), (PP), (N), (F))
428 A_LOCK(&a_op_map_mutex);
430 a_map_store_locked(o, old_pp, next, flags);
432 A_UNLOCK(&a_op_map_mutex);
435 STATIC void a_map_delete(pTHX_ const OP *o) {
436 #define a_map_delete(O) a_map_delete(aTHX_ (O))
437 A_LOCK(&a_op_map_mutex);
439 ptable_map_delete(a_op_map, o);
441 A_UNLOCK(&a_op_map_mutex);
444 STATIC const OP *a_map_descend(const OP *o) {
445 switch (PL_opargs[o->op_type] & OA_CLASS_MASK) {
449 case OA_BASEOP_OR_UNOP:
450 return cUNOPo->op_first;
453 return cLISTOPo->op_last;
459 STATIC void a_map_store_root(pPTBLMS_ const OP *root, OP *(*old_pp)(pTHX), UV flags) {
460 #define a_map_store_root(R, PP, F) a_map_store_root(aPTBLMS_ (R), (PP), (F))
461 const a_op_info *roi;
465 A_LOCK(&a_op_map_mutex);
467 roi = a_map_store_locked(o, old_pp, (OP *) root, flags | A_HINT_ROOT);
469 while (o->op_flags & OPf_KIDS) {
470 o = a_map_descend(o);
473 if ((oi = ptable_fetch(a_op_map, o))) {
474 oi->flags &= ~A_HINT_ROOT;
475 oi->next = (a_op_info *) roi;
480 A_UNLOCK(&a_op_map_mutex);
485 STATIC void a_map_update_flags_topdown(const OP *root, UV flags) {
489 A_LOCK(&a_op_map_mutex);
491 flags &= ~A_HINT_ROOT;
494 if ((oi = ptable_fetch(a_op_map, o)))
495 oi->flags = (oi->flags & A_HINT_ROOT) | flags;
496 if (!(o->op_flags & OPf_KIDS))
498 o = a_map_descend(o);
501 A_UNLOCK(&a_op_map_mutex);
506 #define a_map_cancel(R) a_map_update_flags_topdown((R), 0)
508 STATIC void a_map_update_flags_bottomup(const OP *o, UV flags, UV rflags) {
511 A_LOCK(&a_op_map_mutex);
513 flags &= ~A_HINT_ROOT;
514 rflags |= A_HINT_ROOT;
516 oi = ptable_fetch(a_op_map, o);
517 while (!(oi->flags & A_HINT_ROOT)) {
523 A_UNLOCK(&a_op_map_mutex);
528 /* ... Decide whether this expression should be autovivified or not ........ */
530 STATIC UV a_map_resolve(const OP *o, const a_op_info *oi) {
531 UV flags = 0, rflags;
533 const a_op_info *roi = oi;
535 while (!(roi->flags & A_HINT_ROOT))
540 rflags = roi->flags & ~A_HINT_ROOT;
545 if (root->op_flags & OPf_MOD) {
546 if (rflags & A_HINT_STORE)
547 flags = (A_HINT_STORE|A_HINT_DEREF);
548 } else if (rflags & A_HINT_FETCH)
549 flags = (A_HINT_FETCH|A_HINT_DEREF);
553 a_map_update_flags_bottomup(o, 0, 0);
557 flags |= (rflags & A_HINT_NOTIFY);
558 a_map_update_flags_bottomup(o, flags, 0);
560 return oi->flags & A_HINT_ROOT ? 0 : flags;
563 /* ... Inspired from pp_defined() .......................................... */
565 STATIC int a_undef(pTHX_ SV *sv) {
566 #define a_undef(S) a_undef(aTHX_ (S))
567 switch (SvTYPE(sv)) {
571 if (AvMAX(sv) >= 0 || SvGMAGICAL(sv)
572 || (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied)))
576 if (HvARRAY(sv) || SvGMAGICAL(sv)
577 || (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied)))
589 /* --- PP functions -------------------------------------------------------- */
591 /* Be aware that we restore PL_op->op_ppaddr from the pointer table old_pp
592 * value, another extension might have saved our pp replacement as the ppaddr
593 * for this op, so this doesn't ensure that our function will never be called
594 * again. That's why we don't remove the op info from our map, so that it can
595 * still run correctly if required. */
597 /* ... pp_rv2av ............................................................ */
599 STATIC OP *a_pp_rv2av(pTHX) {
604 oi = a_map_fetch(PL_op);
606 if (oi->flags & A_HINT_DEREF) {
608 /* We always need to push an empty array to fool the pp_aelem() that comes
612 av = sv_2mortal((SV *) newAV());
618 return oi->old_pp(aTHX);
621 /* ... pp_rv2hv ............................................................ */
623 STATIC OP *a_pp_rv2hv_simple(pTHX) {
628 oi = a_map_fetch(PL_op);
630 if (oi->flags & A_HINT_DEREF) {
635 return oi->old_pp(aTHX);
638 STATIC OP *a_pp_rv2hv(pTHX) {
643 oi = a_map_fetch(PL_op);
645 if (oi->flags & A_HINT_DEREF) {
649 hv = sv_2mortal((SV *) newHV());
655 return oi->old_pp(aTHX);
658 /* ... pp_deref (aelem,helem,rv2sv,padsv) .................................. */
660 STATIC OP *a_pp_deref(pTHX) {
666 oi = a_map_fetch(PL_op);
669 if (flags & A_HINT_DEREF) {
672 o = oi->old_pp(aTHX);
674 if (flags & (A_HINT_NOTIFY|A_HINT_STORE)) {
677 if (flags & A_HINT_STRICT)
678 croak("Reference vivification forbidden");
679 else if (flags & A_HINT_WARN)
680 warn("Reference was vivified");
681 else /* A_HINT_STORE */
682 croak("Can't vivify reference");
689 return oi->old_pp(aTHX);
692 /* ... pp_root (exists,delete,keys,values) ................................. */
694 STATIC OP *a_pp_root_unop(pTHX) {
699 /* Can only be reached by keys or values */
700 if (GIMME_V == G_SCALAR) {
709 const a_op_info *oi = a_map_fetch(PL_op);
710 return oi->old_pp(aTHX);
714 STATIC OP *a_pp_root_binop(pTHX) {
717 if (a_undef(TOPm1s)) {
720 if (PL_op->op_type == OP_EXISTS)
728 const a_op_info *oi = a_map_fetch(PL_op);
729 return oi->old_pp(aTHX);
733 /* --- Check functions ----------------------------------------------------- */
735 STATIC void a_recheck_rv2xv(pTHX_ OP *o, OPCODE type, OP *(*new_pp)(pTHX)) {
736 #define a_recheck_rv2xv(O, T, PP) a_recheck_rv2xv(aTHX_ (O), (T), (PP))
738 if (o->op_type == type && o->op_ppaddr != new_pp
739 && cUNOPo->op_first->op_type != OP_GV) {
741 const a_op_info *oi = a_map_fetch(o);
743 a_map_store(o, o->op_ppaddr, oi->next, oi->flags);
744 o->op_ppaddr = new_pp;
751 /* ... ck_pad{any,sv} ...................................................... */
753 /* Sadly, the padsv OPs we are interested in don't trigger the padsv check
754 * function, but are instead manually mutated from a padany. So we store
755 * the op entry in the op map in the padany check function, and we set their
756 * op_ppaddr member in our peephole optimizer replacement below. */
758 STATIC OP *(*a_old_ck_padany)(pTHX_ OP *) = 0;
760 STATIC OP *a_ck_padany(pTHX_ OP *o) {
763 o = a_old_ck_padany(aTHX_ o);
766 if (hint & A_HINT_DO)
767 a_map_store_root(o, o->op_ppaddr, hint);
774 STATIC OP *(*a_old_ck_padsv)(pTHX_ OP *) = 0;
776 STATIC OP *a_ck_padsv(pTHX_ OP *o) {
779 o = a_old_ck_padsv(aTHX_ o);
782 if (hint & A_HINT_DO) {
783 a_map_store_root(o, o->op_ppaddr, hint);
784 o->op_ppaddr = a_pp_deref;
791 /* ... ck_deref (aelem,helem,rv2sv) ........................................ */
793 /* Those ops appear both at the root and inside an expression but there's no
794 * way to distinguish both situations. Worse, we can't even know if we are in a
795 * modifying context, so the expression can't be resolved yet. It will be at the
796 * first invocation of a_pp_deref() for this expression. */
798 STATIC OP *(*a_old_ck_aelem)(pTHX_ OP *) = 0;
799 STATIC OP *(*a_old_ck_helem)(pTHX_ OP *) = 0;
800 STATIC OP *(*a_old_ck_rv2sv)(pTHX_ OP *) = 0;
802 STATIC OP *a_ck_deref(pTHX_ OP *o) {
803 OP * (*old_ck)(pTHX_ OP *o) = 0;
806 switch (o->op_type) {
808 old_ck = a_old_ck_aelem;
809 if ((hint & A_HINT_DO) && !(hint & A_HINT_STRICT))
810 a_recheck_rv2xv(cUNOPo->op_first, OP_RV2AV, a_pp_rv2av);
813 old_ck = a_old_ck_helem;
814 if ((hint & A_HINT_DO) && !(hint & A_HINT_STRICT))
815 a_recheck_rv2xv(cUNOPo->op_first, OP_RV2HV, a_pp_rv2hv_simple);
818 old_ck = a_old_ck_rv2sv;
823 if (hint & A_HINT_DO) {
824 a_map_store_root(o, o->op_ppaddr, hint);
825 o->op_ppaddr = a_pp_deref;
832 /* ... ck_rv2xv (rv2av,rv2hv) .............................................. */
834 /* Those ops also appear both inisde and at the root, hence the caveats for
835 * a_ck_deref() still apply here. Since a padsv/rv2sv must appear before a
836 * rv2[ah]v, resolution is handled by the first call to a_pp_deref() in the
839 STATIC OP *(*a_old_ck_rv2av)(pTHX_ OP *) = 0;
840 STATIC OP *(*a_old_ck_rv2hv)(pTHX_ OP *) = 0;
842 STATIC OP *a_ck_rv2xv(pTHX_ OP *o) {
843 OP * (*old_ck)(pTHX_ OP *o) = 0;
844 OP * (*new_pp)(pTHX) = 0;
847 switch (o->op_type) {
848 case OP_RV2AV: old_ck = a_old_ck_rv2av; new_pp = a_pp_rv2av; break;
849 case OP_RV2HV: old_ck = a_old_ck_rv2hv; new_pp = a_pp_rv2hv_simple; break;
853 if (cUNOPo->op_first->op_type == OP_GV)
857 if (hint & A_HINT_DO && !(hint & A_HINT_STRICT)) {
858 a_map_store_root(o, o->op_ppaddr, hint);
859 o->op_ppaddr = new_pp;
866 /* ... ck_xslice (aslice,hslice) ........................................... */
868 /* I think those are only found at the root, but there's nothing that really
869 * prevent them to be inside the expression too. We only need to update the
870 * root so that the rest of the expression will see the right context when
871 * resolving. That's why we don't replace the ppaddr. */
873 STATIC OP *(*a_old_ck_aslice)(pTHX_ OP *) = 0;
874 STATIC OP *(*a_old_ck_hslice)(pTHX_ OP *) = 0;
876 STATIC OP *a_ck_xslice(pTHX_ OP *o) {
877 OP * (*old_ck)(pTHX_ OP *o) = 0;
880 switch (o->op_type) {
882 old_ck = a_old_ck_aslice;
885 old_ck = a_old_ck_hslice;
886 if (hint & A_HINT_DO)
887 a_recheck_rv2xv(cUNOPo->op_first->op_sibling, OP_RV2HV, a_pp_rv2hv);
892 if (hint & A_HINT_DO) {
893 a_map_store_root(o, 0, hint);
900 /* ... ck_root (exists,delete,keys,values) ................................. */
902 /* Those ops are only found at the root of a dereferencing expression. We can
903 * then resolve at compile time if vivification must take place or not. */
905 STATIC OP *(*a_old_ck_exists)(pTHX_ OP *) = 0;
906 STATIC OP *(*a_old_ck_delete)(pTHX_ OP *) = 0;
907 STATIC OP *(*a_old_ck_keys) (pTHX_ OP *) = 0;
908 STATIC OP *(*a_old_ck_values)(pTHX_ OP *) = 0;
910 STATIC OP *a_ck_root(pTHX_ OP *o) {
911 OP * (*old_ck)(pTHX_ OP *o) = 0;
912 OP * (*new_pp)(pTHX) = 0;
913 bool enabled = FALSE;
916 switch (o->op_type) {
918 old_ck = a_old_ck_exists;
919 new_pp = a_pp_root_binop;
920 enabled = hint & A_HINT_EXISTS;
923 old_ck = a_old_ck_delete;
924 new_pp = a_pp_root_binop;
925 enabled = hint & A_HINT_DELETE;
928 old_ck = a_old_ck_keys;
929 new_pp = a_pp_root_unop;
930 enabled = hint & A_HINT_FETCH;
933 old_ck = a_old_ck_values;
934 new_pp = a_pp_root_unop;
935 enabled = hint & A_HINT_FETCH;
940 if (hint & A_HINT_DO) {
942 a_map_update_flags_topdown(o, hint | A_HINT_DEREF);
943 a_map_store_root(o, o->op_ppaddr, hint);
944 o->op_ppaddr = new_pp;
954 /* ... Our peephole optimizer .............................................. */
956 STATIC peep_t a_old_peep = 0; /* This is actually the rpeep past 5.13.5 */
959 # define A_PEEP_REC_PROTO STATIC void a_peep_rec(pTHX_ OP *o, ptable *seen)
960 #else /* !A_HAS_RPEEP */
961 # define A_PEEP_REC_PROTO STATIC void a_peep_rec(pTHX_ OP *o)
962 #endif /* A_HAS_RPEEP */
967 # define a_peep_rec(O) a_peep_rec(aTHX_ (O), seen)
968 #else /* !A_HAS_RPEEP */
969 # define a_peep_rec(O) a_peep_rec(aTHX_ (O))
970 #endif /* A_HAS_RPEEP */
974 if (ptable_fetch(seen, o))
978 for (; o; o = o->op_next) {
979 const a_op_info *oi = NULL;
983 ptable_seen_store(seen, o, o);
985 switch (o->op_type) {
987 if (o->op_ppaddr != a_pp_deref) {
989 if (oi && (oi->flags & A_HINT_DO)) {
990 a_map_store(o, o->op_ppaddr, oi->next, oi->flags);
991 o->op_ppaddr = a_pp_deref;
999 if (o->op_ppaddr != a_pp_deref)
1001 oi = a_map_fetch(o);
1005 if (!(flags & A_HINT_DEREF)
1006 && (flags & A_HINT_DO)
1007 && (o->op_private & OPpDEREF || flags & A_HINT_ROOT)) {
1008 /* Decide if the expression must autovivify or not. */
1009 flags = a_map_resolve(o, oi);
1011 if (flags & A_HINT_DEREF)
1012 o->op_private = ((o->op_private & ~OPpDEREF) | OPpLVAL_DEFER);
1014 o->op_ppaddr = oi->old_pp;
1018 if ( o->op_ppaddr != a_pp_rv2av
1019 && o->op_ppaddr != a_pp_rv2hv
1020 && o->op_ppaddr != a_pp_rv2hv_simple)
1022 oi = a_map_fetch(o);
1025 if (!(oi->flags & A_HINT_DEREF))
1026 o->op_ppaddr = oi->old_pp;
1037 # if A_HAS_PERL(5, 10, 0)
1042 a_peep_rec(cLOGOPo->op_other);
1046 a_peep_rec(cLOOPo->op_redoop);
1047 a_peep_rec(cLOOPo->op_nextop);
1048 a_peep_rec(cLOOPo->op_lastop);
1050 # if A_HAS_PERL(5, 9, 5)
1052 a_peep_rec(cPMOPo->op_pmstashstartu.op_pmreplstart);
1058 a_peep_rec(cPMOPo->op_pmreplstart);
1061 #endif /* !A_HAS_RPEEP */
1068 STATIC void a_peep(pTHX_ OP *o) {
1071 ptable *seen = MY_CXT.seen;
1073 ptable_seen_clear(seen);
1074 #endif /* !A_HAS_RPEEP */
1076 a_old_peep(aTHX_ o);
1080 /* --- Interpreter setup/teardown ------------------------------------------ */
1082 STATIC U32 a_initialized = 0;
1084 STATIC void a_teardown(pTHX_ void *root) {
1097 # if A_THREADSAFE && A_WORKAROUND_REQUIRE_PROPAGATION
1098 ptable_hints_free(MY_CXT.tbl);
1099 # endif /* A_THREADSAFE && A_WORKAROUND_REQUIRE_PROPAGATION */
1101 ptable_seen_free(MY_CXT.seen);
1102 # endif /* !A_HAS_RPEEP */
1104 #endif /* A_NEED_CXT */
1106 PL_check[OP_PADANY] = MEMBER_TO_FPTR(a_old_ck_padany);
1107 a_old_ck_padany = 0;
1108 PL_check[OP_PADSV] = MEMBER_TO_FPTR(a_old_ck_padsv);
1111 PL_check[OP_AELEM] = MEMBER_TO_FPTR(a_old_ck_aelem);
1113 PL_check[OP_HELEM] = MEMBER_TO_FPTR(a_old_ck_helem);
1115 PL_check[OP_RV2SV] = MEMBER_TO_FPTR(a_old_ck_rv2sv);
1118 PL_check[OP_RV2AV] = MEMBER_TO_FPTR(a_old_ck_rv2av);
1120 PL_check[OP_RV2HV] = MEMBER_TO_FPTR(a_old_ck_rv2hv);
1123 PL_check[OP_ASLICE] = MEMBER_TO_FPTR(a_old_ck_aslice);
1124 a_old_ck_aslice = 0;
1125 PL_check[OP_HSLICE] = MEMBER_TO_FPTR(a_old_ck_hslice);
1126 a_old_ck_hslice = 0;
1128 PL_check[OP_EXISTS] = MEMBER_TO_FPTR(a_old_ck_exists);
1129 a_old_ck_exists = 0;
1130 PL_check[OP_DELETE] = MEMBER_TO_FPTR(a_old_ck_delete);
1131 a_old_ck_delete = 0;
1132 PL_check[OP_KEYS] = MEMBER_TO_FPTR(a_old_ck_keys);
1134 PL_check[OP_VALUES] = MEMBER_TO_FPTR(a_old_ck_values);
1135 a_old_ck_values = 0;
1138 PL_rpeepp = a_old_peep;
1140 PL_peepp = a_old_peep;
1147 STATIC void a_setup(pTHX) {
1148 #define a_setup() a_setup(aTHX)
1155 # if A_THREADSAFE && A_WORKAROUND_REQUIRE_PROPAGATION
1156 MY_CXT.tbl = ptable_new();
1157 MY_CXT.owner = aTHX;
1158 # endif /* A_THREADSAFE && A_WORKAROUND_REQUIRE_PROPAGATION */
1160 MY_CXT.seen = ptable_new();
1161 # endif /* !A_RPEEP */
1163 #endif /* A_NEED_CXT */
1165 a_old_ck_padany = PL_check[OP_PADANY];
1166 PL_check[OP_PADANY] = MEMBER_TO_FPTR(a_ck_padany);
1167 a_old_ck_padsv = PL_check[OP_PADSV];
1168 PL_check[OP_PADSV] = MEMBER_TO_FPTR(a_ck_padsv);
1170 a_old_ck_aelem = PL_check[OP_AELEM];
1171 PL_check[OP_AELEM] = MEMBER_TO_FPTR(a_ck_deref);
1172 a_old_ck_helem = PL_check[OP_HELEM];
1173 PL_check[OP_HELEM] = MEMBER_TO_FPTR(a_ck_deref);
1174 a_old_ck_rv2sv = PL_check[OP_RV2SV];
1175 PL_check[OP_RV2SV] = MEMBER_TO_FPTR(a_ck_deref);
1177 a_old_ck_rv2av = PL_check[OP_RV2AV];
1178 PL_check[OP_RV2AV] = MEMBER_TO_FPTR(a_ck_rv2xv);
1179 a_old_ck_rv2hv = PL_check[OP_RV2HV];
1180 PL_check[OP_RV2HV] = MEMBER_TO_FPTR(a_ck_rv2xv);
1182 a_old_ck_aslice = PL_check[OP_ASLICE];
1183 PL_check[OP_ASLICE] = MEMBER_TO_FPTR(a_ck_xslice);
1184 a_old_ck_hslice = PL_check[OP_HSLICE];
1185 PL_check[OP_HSLICE] = MEMBER_TO_FPTR(a_ck_xslice);
1187 a_old_ck_exists = PL_check[OP_EXISTS];
1188 PL_check[OP_EXISTS] = MEMBER_TO_FPTR(a_ck_root);
1189 a_old_ck_delete = PL_check[OP_DELETE];
1190 PL_check[OP_DELETE] = MEMBER_TO_FPTR(a_ck_root);
1191 a_old_ck_keys = PL_check[OP_KEYS];
1192 PL_check[OP_KEYS] = MEMBER_TO_FPTR(a_ck_root);
1193 a_old_ck_values = PL_check[OP_VALUES];
1194 PL_check[OP_VALUES] = MEMBER_TO_FPTR(a_ck_root);
1197 a_old_peep = PL_rpeepp;
1200 a_old_peep = PL_peepp;
1205 call_atexit(a_teardown, aTHX);
1207 call_atexit(a_teardown, NULL);
1213 STATIC U32 a_booted = 0;
1215 /* --- XS ------------------------------------------------------------------ */
1217 MODULE = autovivification PACKAGE = autovivification
1226 a_op_map = ptable_new();
1228 MUTEX_INIT(&a_op_map_mutex);
1231 PERL_HASH(a_hash, __PACKAGE__, __PACKAGE_LEN__);
1233 stash = gv_stashpvn(__PACKAGE__, __PACKAGE_LEN__, 1);
1234 newCONSTSUB(stash, "A_HINT_STRICT", newSVuv(A_HINT_STRICT));
1235 newCONSTSUB(stash, "A_HINT_WARN", newSVuv(A_HINT_WARN));
1236 newCONSTSUB(stash, "A_HINT_FETCH", newSVuv(A_HINT_FETCH));
1237 newCONSTSUB(stash, "A_HINT_STORE", newSVuv(A_HINT_STORE));
1238 newCONSTSUB(stash, "A_HINT_EXISTS", newSVuv(A_HINT_EXISTS));
1239 newCONSTSUB(stash, "A_HINT_DELETE", newSVuv(A_HINT_DELETE));
1240 newCONSTSUB(stash, "A_HINT_MASK", newSVuv(A_HINT_MASK));
1241 newCONSTSUB(stash, "A_THREADSAFE", newSVuv(A_THREADSAFE));
1242 newCONSTSUB(stash, "A_FORKSAFE", newSVuv(A_FORKSAFE));
1248 #if A_THREADSAFE && (A_WORKAROUND_REQUIRE_PROPAGATION || !A_HAS_RPEEP)
1254 #if A_WORKAROUND_REQUIRE_PROPAGATION
1263 #if A_WORKAROUND_REQUIRE_PROPAGATION
1265 a_ptable_clone_ud ud;
1268 a_ptable_clone_ud_init(ud, t, MY_CXT.owner);
1269 ptable_walk(MY_CXT.tbl, a_ptable_clone, &ud);
1270 a_ptable_clone_ud_deinit(ud);
1279 #if A_WORKAROUND_REQUIRE_PROPAGATION
1281 MY_CXT.owner = aTHX;
1287 reap(3, a_thread_cleanup, NULL);
1296 RETVAL = a_tag(SvOK(hint) ? SvUV(hint) : 0);
1306 RETVAL = newSVuv(a_detag(tag));