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))))))
24 #ifndef A_WORKAROUND_REQUIRE_PROPAGATION
25 # define A_WORKAROUND_REQUIRE_PROPAGATION !A_HAS_PERL(5, 10, 1)
29 # define A_HAS_RPEEP A_HAS_PERL(5, 13, 5)
32 /* ... Thread safety and multiplicity ...................................... */
34 /* Always safe when the workaround isn't needed */
35 #if !A_WORKAROUND_REQUIRE_PROPAGATION
38 /* Otherwise, safe unless Makefile.PL says it's Win32 */
39 #elif !defined(A_FORKSAFE)
43 #ifndef A_MULTIPLICITY
44 # if defined(MULTIPLICITY) || defined(PERL_IMPLICIT_CONTEXT)
45 # define A_MULTIPLICITY 1
47 # define A_MULTIPLICITY 0
52 # define tTHX PerlInterpreter*
55 #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))
56 # define A_THREADSAFE 1
58 # define MY_CXT_CLONE \
60 my_cxt_t *my_cxtp = (my_cxt_t*)SvPVX(newSV(sizeof(my_cxt_t)-1)); \
61 Copy(INT2PTR(my_cxt_t*, SvUV(my_cxt_sv)), my_cxtp, 1, my_cxt_t); \
62 sv_setuv(my_cxt_sv, PTR2UV(my_cxtp))
65 # define A_THREADSAFE 0
67 # define dMY_CXT dNOOP
69 # define MY_CXT a_globaldata
71 # define START_MY_CXT STATIC my_cxt_t MY_CXT;
73 # define MY_CXT_INIT NOOP
75 # define MY_CXT_CLONE NOOP
78 /* --- Helpers ------------------------------------------------------------- */
80 /* ... Thread-safe hints ................................................... */
82 #if A_WORKAROUND_REQUIRE_PROPAGATION
89 #define A_HINT_FREE(H) PerlMemShared_free(H)
93 #define PTABLE_NAME ptable_hints
94 #define PTABLE_VAL_FREE(V) A_HINT_FREE(V)
103 #define ptable_hints_store(T, K, V) ptable_hints_store(aTHX_ (T), (K), (V))
104 #define ptable_hints_free(T) ptable_hints_free(aTHX_ (T))
106 #endif /* A_THREADSAFE */
108 #endif /* A_WORKAROUND_REQUIRE_PROPAGATION */
112 #define PTABLE_NAME ptable_seen
113 #define PTABLE_VAL_FREE(V) NOOP
117 #endif /* !A_HAS_RPEEP */
119 #define A_NEED_CXT ((A_THREADSAFE && A_WORKAROUND_REQUIRE_PROPAGATION) || !A_HAS_RPEEP)
123 #define MY_CXT_KEY __PACKAGE__ "::_guts" XS_VERSION
126 #if A_THREADSAFE && A_WORKAROUND_REQUIRE_PROPAGATION
127 ptable *tbl; /* It really is a ptable_hints */
129 #endif /* A_THREADSAFE && A_WORKAROUND_REQUIRE_PROPAGATION */
131 ptable *seen; /* It really is a ptable_seen */
132 #endif /* !A_HAS_RPEEP */
139 #if A_WORKAROUND_REQUIRE_PROPAGATION
143 #if A_HAS_PERL(5, 13, 2)
144 CLONE_PARAMS *params;
150 #if A_HAS_PERL(5, 13, 2)
151 # define a_ptable_clone_ud_init(U, T, O) \
153 (U).params = Perl_clone_params_new((O), aTHX)
154 # define a_ptable_clone_ud_deinit(U) Perl_clone_params_del((U).params)
155 # define a_dup_inc(S, U) SvREFCNT_inc(sv_dup((S), (U)->params))
157 # define a_ptable_clone_ud_init(U, T, O) \
159 (U).params.stashes = newAV(); \
160 (U).params.flags = 0; \
161 (U).params.proto_perl = (O)
162 # define a_ptable_clone_ud_deinit(U) SvREFCNT_dec((U).params.stashes)
163 # define a_dup_inc(S, U) SvREFCNT_inc(sv_dup((S), &((U)->params)))
166 STATIC void a_ptable_clone(pTHX_ ptable_ent *ent, void *ud_) {
167 a_ptable_clone_ud *ud = ud_;
168 a_hint_t *h1 = ent->val;
171 h2 = PerlMemShared_malloc(sizeof *h2);
173 h2->require_tag = PTR2IV(a_dup_inc(INT2PTR(SV *, h1->require_tag), ud));
175 ptable_hints_store(ud->tbl, ent->key, h2);
178 #endif /* A_WORKAROUND_REQUIRE_PROPAGATION */
182 STATIC void a_thread_cleanup(pTHX_ void *ud) {
185 #if A_WORKAROUND_REQUIRE_PROPAGATION
186 ptable_hints_free(MY_CXT.tbl);
187 #endif /* A_WORKAROUND_REQUIRE_PROPAGATION */
189 ptable_seen_free(MY_CXT.seen);
190 #endif /* !A_HAS_RPEEP */
193 #endif /* A_THREADSAFE */
195 #endif /* A_NEED_CXT */
197 #if A_WORKAROUND_REQUIRE_PROPAGATION
199 STATIC IV a_require_tag(pTHX) {
200 #define a_require_tag() a_require_tag(aTHX)
201 const CV *cv, *outside;
206 /* If for some reason the pragma is operational at run-time, try to discover
207 * the current cv in use. */
210 for (si = PL_curstackinfo; si; si = si->si_prev) {
213 for (cxix = si->si_cxix; cxix >= 0; --cxix) {
214 const PERL_CONTEXT *cx = si->si_cxstack + cxix;
216 switch (CxTYPE(cx)) {
219 /* The propagation workaround is only needed up to 5.10.0 and at that
220 * time format and sub contexts were still identical. And even later the
221 * cv members offsets should have been kept the same. */
223 goto get_enclosing_cv;
225 cv = cx->blk_eval.cv;
226 goto get_enclosing_cv;
237 for (outside = CvOUTSIDE(cv); outside; outside = CvOUTSIDE(cv))
243 STATIC SV *a_tag(pTHX_ UV bits) {
244 #define a_tag(B) a_tag(aTHX_ (B))
250 h = PerlMemShared_malloc(sizeof *h);
252 h->require_tag = a_require_tag();
255 /* We only need for the key to be an unique tag for looking up the value later.
256 * Allocated memory provides convenient unique identifiers, so that's why we
257 * use the hint as the key itself. */
258 ptable_hints_store(MY_CXT.tbl, h, h);
259 #endif /* A_THREADSAFE */
261 return newSViv(PTR2IV(h));
264 STATIC UV a_detag(pTHX_ const SV *hint) {
265 #define a_detag(H) a_detag(aTHX_ (H))
271 if (!(hint && SvIOK(hint)))
274 h = INT2PTR(a_hint_t *, SvIVX(hint));
276 h = ptable_fetch(MY_CXT.tbl, h);
277 #endif /* A_THREADSAFE */
279 if (a_require_tag() != h->require_tag)
285 #else /* A_WORKAROUND_REQUIRE_PROPAGATION */
287 #define a_tag(B) newSVuv(B)
288 /* PVs fetched from the hints chain have their SvLEN set to zero, so get the UV
295 ? sv_2uv(SvLEN(H) ? (H) : sv_mortalcopy(H)) \
301 #endif /* !A_WORKAROUND_REQUIRE_PROPAGATION */
303 /* Used both for hints and op flags */
304 #define A_HINT_STRICT 1
305 #define A_HINT_WARN 2
306 #define A_HINT_FETCH 4
307 #define A_HINT_STORE 8
308 #define A_HINT_EXISTS 16
309 #define A_HINT_DELETE 32
310 #define A_HINT_NOTIFY (A_HINT_STRICT|A_HINT_WARN)
311 #define A_HINT_DO (A_HINT_FETCH|A_HINT_STORE|A_HINT_EXISTS|A_HINT_DELETE)
312 #define A_HINT_MASK (A_HINT_NOTIFY|A_HINT_DO)
314 /* Only used in op flags */
315 #define A_HINT_ROOT 64
316 #define A_HINT_DEREF 128
318 STATIC U32 a_hash = 0;
320 STATIC UV a_hint(pTHX) {
321 #define a_hint() a_hint(aTHX)
323 #ifdef cop_hints_fetch_pvn
324 hint = cop_hints_fetch_pvn(PL_curcop, __PACKAGE__, __PACKAGE_LEN__, a_hash, 0);
325 #elif A_HAS_PERL(5, 9, 5)
326 hint = Perl_refcounted_he_fetch(aTHX_ PL_curcop->cop_hints_hash,
328 __PACKAGE__, __PACKAGE_LEN__,
332 SV **val = hv_fetch(GvHV(PL_hintgv), __PACKAGE__, __PACKAGE_LEN__, a_hash);
337 return a_detag(hint);
340 /* ... op => info map ...................................................... */
348 #define PTABLE_NAME ptable_map
349 #define PTABLE_VAL_FREE(V) PerlMemShared_free(V)
353 /* PerlMemShared_free() needs the [ap]PTBLMS_? default values */
354 #define ptable_map_store(T, K, V) ptable_map_store(aPTBLMS_ (T), (K), (V))
356 STATIC ptable *a_op_map = NULL;
360 #define dA_MAP_THX a_op_info a_op_map_tmp_oi
362 STATIC perl_mutex a_op_map_mutex;
364 #define A_LOCK(M) MUTEX_LOCK(M)
365 #define A_UNLOCK(M) MUTEX_UNLOCK(M)
367 STATIC const a_op_info *a_map_fetch(const OP *o, a_op_info *oi) {
368 const a_op_info *val;
370 A_LOCK(&a_op_map_mutex);
372 val = ptable_fetch(a_op_map, o);
378 A_UNLOCK(&a_op_map_mutex);
383 #define a_map_fetch(O) a_map_fetch((O), &a_op_map_tmp_oi)
385 #else /* USE_ITHREADS */
387 #define dA_MAP_THX dNOOP
389 #define A_LOCK(M) NOOP
390 #define A_UNLOCK(M) NOOP
392 #define a_map_fetch(O) ptable_fetch(a_op_map, (O))
394 #endif /* !USE_ITHREADS */
396 STATIC const a_op_info *a_map_store_locked(pPTBLMS_ const OP *o, OP *(*old_pp)(pTHX), void *next, UV flags) {
397 #define a_map_store_locked(O, PP, N, F) a_map_store_locked(aPTBLMS_ (O), (PP), (N), (F))
400 if (!(oi = ptable_fetch(a_op_map, o))) {
401 oi = PerlMemShared_malloc(sizeof *oi);
402 ptable_map_store(a_op_map, o, oi);
412 STATIC void a_map_store(pPTBLMS_ const OP *o, OP *(*old_pp)(pTHX), void *next, UV flags) {
413 #define a_map_store(O, PP, N, F) a_map_store(aPTBLMS_ (O), (PP), (N), (F))
414 A_LOCK(&a_op_map_mutex);
416 a_map_store_locked(o, old_pp, next, flags);
418 A_UNLOCK(&a_op_map_mutex);
421 STATIC void a_map_delete(pTHX_ const OP *o) {
422 #define a_map_delete(O) a_map_delete(aTHX_ (O))
423 A_LOCK(&a_op_map_mutex);
425 ptable_map_delete(a_op_map, o);
427 A_UNLOCK(&a_op_map_mutex);
430 STATIC const OP *a_map_descend(const OP *o) {
431 switch (PL_opargs[o->op_type] & OA_CLASS_MASK) {
435 case OA_BASEOP_OR_UNOP:
436 return cUNOPo->op_first;
439 return cLISTOPo->op_last;
445 STATIC void a_map_store_root(pPTBLMS_ const OP *root, OP *(*old_pp)(pTHX), UV flags) {
446 #define a_map_store_root(R, PP, F) a_map_store_root(aPTBLMS_ (R), (PP), (F))
447 const a_op_info *roi;
451 A_LOCK(&a_op_map_mutex);
453 roi = a_map_store_locked(o, old_pp, (OP *) root, flags | A_HINT_ROOT);
455 while (o->op_flags & OPf_KIDS) {
456 o = a_map_descend(o);
459 if ((oi = ptable_fetch(a_op_map, o))) {
460 oi->flags &= ~A_HINT_ROOT;
461 oi->next = (a_op_info *) roi;
466 A_UNLOCK(&a_op_map_mutex);
471 STATIC void a_map_update_flags_topdown(const OP *root, UV flags) {
475 A_LOCK(&a_op_map_mutex);
477 flags &= ~A_HINT_ROOT;
480 if ((oi = ptable_fetch(a_op_map, o)))
481 oi->flags = (oi->flags & A_HINT_ROOT) | flags;
482 if (!(o->op_flags & OPf_KIDS))
484 o = a_map_descend(o);
487 A_UNLOCK(&a_op_map_mutex);
492 #define a_map_cancel(R) a_map_update_flags_topdown((R), 0)
494 STATIC void a_map_update_flags_bottomup(const OP *o, UV flags, UV rflags) {
497 A_LOCK(&a_op_map_mutex);
499 flags &= ~A_HINT_ROOT;
500 rflags |= A_HINT_ROOT;
502 oi = ptable_fetch(a_op_map, o);
503 while (!(oi->flags & A_HINT_ROOT)) {
509 A_UNLOCK(&a_op_map_mutex);
514 /* ... Decide whether this expression should be autovivified or not ........ */
516 STATIC UV a_map_resolve(const OP *o, const a_op_info *oi) {
517 UV flags = 0, rflags;
519 const a_op_info *roi = oi;
521 while (!(roi->flags & A_HINT_ROOT))
526 rflags = roi->flags & ~A_HINT_ROOT;
531 if (root->op_flags & OPf_MOD) {
532 if (rflags & A_HINT_STORE)
533 flags = (A_HINT_STORE|A_HINT_DEREF);
534 } else if (rflags & A_HINT_FETCH)
535 flags = (A_HINT_FETCH|A_HINT_DEREF);
539 a_map_update_flags_bottomup(o, 0, 0);
543 flags |= (rflags & A_HINT_NOTIFY);
544 a_map_update_flags_bottomup(o, flags, 0);
546 return oi->flags & A_HINT_ROOT ? 0 : flags;
549 /* ... Inspired from pp_defined() .......................................... */
551 STATIC int a_undef(pTHX_ SV *sv) {
552 #define a_undef(S) a_undef(aTHX_ (S))
553 switch (SvTYPE(sv)) {
557 if (AvMAX(sv) >= 0 || SvGMAGICAL(sv)
558 || (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied)))
562 if (HvARRAY(sv) || SvGMAGICAL(sv)
563 || (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied)))
575 /* --- PP functions -------------------------------------------------------- */
577 /* Be aware that we restore PL_op->op_ppaddr from the pointer table old_pp
578 * value, another extension might have saved our pp replacement as the ppaddr
579 * for this op, so this doesn't ensure that our function will never be called
580 * again. That's why we don't remove the op info from our map, so that it can
581 * still run correctly if required. */
583 /* ... pp_rv2av ............................................................ */
585 STATIC OP *a_pp_rv2av(pTHX) {
590 oi = a_map_fetch(PL_op);
592 if (oi->flags & A_HINT_DEREF) {
594 /* We always need to push an empty array to fool the pp_aelem() that comes
598 av = sv_2mortal((SV *) newAV());
604 return oi->old_pp(aTHX);
607 /* ... pp_rv2hv ............................................................ */
609 STATIC OP *a_pp_rv2hv_simple(pTHX) {
614 oi = a_map_fetch(PL_op);
616 if (oi->flags & A_HINT_DEREF) {
621 return oi->old_pp(aTHX);
624 STATIC OP *a_pp_rv2hv(pTHX) {
629 oi = a_map_fetch(PL_op);
631 if (oi->flags & A_HINT_DEREF) {
635 hv = sv_2mortal((SV *) newHV());
641 return oi->old_pp(aTHX);
644 /* ... pp_deref (aelem,helem,rv2sv,padsv) .................................. */
646 STATIC OP *a_pp_deref(pTHX) {
652 oi = a_map_fetch(PL_op);
655 if (flags & A_HINT_DEREF) {
658 o = oi->old_pp(aTHX);
660 if (flags & (A_HINT_NOTIFY|A_HINT_STORE)) {
663 if (flags & A_HINT_STRICT)
664 croak("Reference vivification forbidden");
665 else if (flags & A_HINT_WARN)
666 warn("Reference was vivified");
667 else /* A_HINT_STORE */
668 croak("Can't vivify reference");
675 return oi->old_pp(aTHX);
678 /* ... pp_root (exists,delete,keys,values) ................................. */
680 STATIC OP *a_pp_root_unop(pTHX) {
685 /* Can only be reached by keys or values */
686 if (GIMME_V == G_SCALAR) {
695 const a_op_info *oi = a_map_fetch(PL_op);
696 return oi->old_pp(aTHX);
700 STATIC OP *a_pp_root_binop(pTHX) {
703 if (a_undef(TOPm1s)) {
706 if (PL_op->op_type == OP_EXISTS)
714 const a_op_info *oi = a_map_fetch(PL_op);
715 return oi->old_pp(aTHX);
719 /* --- Check functions ----------------------------------------------------- */
721 STATIC void a_recheck_rv2xv(pTHX_ OP *o, OPCODE type, OP *(*new_pp)(pTHX)) {
722 #define a_recheck_rv2xv(O, T, PP) a_recheck_rv2xv(aTHX_ (O), (T), (PP))
724 if (o->op_type == type && o->op_ppaddr != new_pp
725 && cUNOPo->op_first->op_type != OP_GV) {
727 const a_op_info *oi = a_map_fetch(o);
729 a_map_store(o, o->op_ppaddr, oi->next, oi->flags);
730 o->op_ppaddr = new_pp;
737 /* ... ck_pad{any,sv} ...................................................... */
739 /* Sadly, the padsv OPs we are interested in don't trigger the padsv check
740 * function, but are instead manually mutated from a padany. So we store
741 * the op entry in the op map in the padany check function, and we set their
742 * op_ppaddr member in our peephole optimizer replacement below. */
744 STATIC OP *(*a_old_ck_padany)(pTHX_ OP *) = 0;
746 STATIC OP *a_ck_padany(pTHX_ OP *o) {
749 o = a_old_ck_padany(aTHX_ o);
752 if (hint & A_HINT_DO)
753 a_map_store_root(o, o->op_ppaddr, hint);
760 STATIC OP *(*a_old_ck_padsv)(pTHX_ OP *) = 0;
762 STATIC OP *a_ck_padsv(pTHX_ OP *o) {
765 o = a_old_ck_padsv(aTHX_ o);
768 if (hint & A_HINT_DO) {
769 a_map_store_root(o, o->op_ppaddr, hint);
770 o->op_ppaddr = a_pp_deref;
777 /* ... ck_deref (aelem,helem,rv2sv) ........................................ */
779 /* Those ops appear both at the root and inside an expression but there's no
780 * way to distinguish both situations. Worse, we can't even know if we are in a
781 * modifying context, so the expression can't be resolved yet. It will be at the
782 * first invocation of a_pp_deref() for this expression. */
784 STATIC OP *(*a_old_ck_aelem)(pTHX_ OP *) = 0;
785 STATIC OP *(*a_old_ck_helem)(pTHX_ OP *) = 0;
786 STATIC OP *(*a_old_ck_rv2sv)(pTHX_ OP *) = 0;
788 STATIC OP *a_ck_deref(pTHX_ OP *o) {
789 OP * (*old_ck)(pTHX_ OP *o) = 0;
792 switch (o->op_type) {
794 old_ck = a_old_ck_aelem;
795 if ((hint & A_HINT_DO) && !(hint & A_HINT_STRICT))
796 a_recheck_rv2xv(cUNOPo->op_first, OP_RV2AV, a_pp_rv2av);
799 old_ck = a_old_ck_helem;
800 if ((hint & A_HINT_DO) && !(hint & A_HINT_STRICT))
801 a_recheck_rv2xv(cUNOPo->op_first, OP_RV2HV, a_pp_rv2hv_simple);
804 old_ck = a_old_ck_rv2sv;
809 if (hint & A_HINT_DO) {
810 a_map_store_root(o, o->op_ppaddr, hint);
811 o->op_ppaddr = a_pp_deref;
818 /* ... ck_rv2xv (rv2av,rv2hv) .............................................. */
820 /* Those ops also appear both inisde and at the root, hence the caveats for
821 * a_ck_deref() still apply here. Since a padsv/rv2sv must appear before a
822 * rv2[ah]v, resolution is handled by the first call to a_pp_deref() in the
825 STATIC OP *(*a_old_ck_rv2av)(pTHX_ OP *) = 0;
826 STATIC OP *(*a_old_ck_rv2hv)(pTHX_ OP *) = 0;
828 STATIC OP *a_ck_rv2xv(pTHX_ OP *o) {
829 OP * (*old_ck)(pTHX_ OP *o) = 0;
830 OP * (*new_pp)(pTHX) = 0;
833 switch (o->op_type) {
834 case OP_RV2AV: old_ck = a_old_ck_rv2av; new_pp = a_pp_rv2av; break;
835 case OP_RV2HV: old_ck = a_old_ck_rv2hv; new_pp = a_pp_rv2hv_simple; break;
839 if (cUNOPo->op_first->op_type == OP_GV)
843 if (hint & A_HINT_DO && !(hint & A_HINT_STRICT)) {
844 a_map_store_root(o, o->op_ppaddr, hint);
845 o->op_ppaddr = new_pp;
852 /* ... ck_xslice (aslice,hslice) ........................................... */
854 /* I think those are only found at the root, but there's nothing that really
855 * prevent them to be inside the expression too. We only need to update the
856 * root so that the rest of the expression will see the right context when
857 * resolving. That's why we don't replace the ppaddr. */
859 STATIC OP *(*a_old_ck_aslice)(pTHX_ OP *) = 0;
860 STATIC OP *(*a_old_ck_hslice)(pTHX_ OP *) = 0;
862 STATIC OP *a_ck_xslice(pTHX_ OP *o) {
863 OP * (*old_ck)(pTHX_ OP *o) = 0;
866 switch (o->op_type) {
868 old_ck = a_old_ck_aslice;
871 old_ck = a_old_ck_hslice;
872 if (hint & A_HINT_DO)
873 a_recheck_rv2xv(cUNOPo->op_first->op_sibling, OP_RV2HV, a_pp_rv2hv);
878 if (hint & A_HINT_DO) {
879 a_map_store_root(o, 0, hint);
886 /* ... ck_root (exists,delete,keys,values) ................................. */
888 /* Those ops are only found at the root of a dereferencing expression. We can
889 * then resolve at compile time if vivification must take place or not. */
891 STATIC OP *(*a_old_ck_exists)(pTHX_ OP *) = 0;
892 STATIC OP *(*a_old_ck_delete)(pTHX_ OP *) = 0;
893 STATIC OP *(*a_old_ck_keys) (pTHX_ OP *) = 0;
894 STATIC OP *(*a_old_ck_values)(pTHX_ OP *) = 0;
896 STATIC OP *a_ck_root(pTHX_ OP *o) {
897 OP * (*old_ck)(pTHX_ OP *o) = 0;
898 OP * (*new_pp)(pTHX) = 0;
899 bool enabled = FALSE;
902 switch (o->op_type) {
904 old_ck = a_old_ck_exists;
905 new_pp = a_pp_root_binop;
906 enabled = hint & A_HINT_EXISTS;
909 old_ck = a_old_ck_delete;
910 new_pp = a_pp_root_binop;
911 enabled = hint & A_HINT_DELETE;
914 old_ck = a_old_ck_keys;
915 new_pp = a_pp_root_unop;
916 enabled = hint & A_HINT_FETCH;
919 old_ck = a_old_ck_values;
920 new_pp = a_pp_root_unop;
921 enabled = hint & A_HINT_FETCH;
926 if (hint & A_HINT_DO) {
928 a_map_update_flags_topdown(o, hint | A_HINT_DEREF);
929 a_map_store_root(o, o->op_ppaddr, hint);
930 o->op_ppaddr = new_pp;
940 /* ... Our peephole optimizer .............................................. */
942 STATIC peep_t a_old_peep = 0; /* This is actually the rpeep past 5.13.5 */
945 # define A_PEEP_REC_PROTO STATIC void a_peep_rec(pTHX_ OP *o, ptable *seen)
946 #else /* !A_HAS_RPEEP */
947 # define A_PEEP_REC_PROTO STATIC void a_peep_rec(pTHX_ OP *o)
948 #endif /* A_HAS_RPEEP */
953 # define a_peep_rec(O) a_peep_rec(aTHX_ (O), seen)
954 #else /* !A_HAS_RPEEP */
955 # define a_peep_rec(O) a_peep_rec(aTHX_ (O))
956 #endif /* A_HAS_RPEEP */
960 if (ptable_fetch(seen, o))
964 for (; o; o = o->op_next) {
965 const a_op_info *oi = NULL;
969 ptable_seen_store(seen, o, o);
971 switch (o->op_type) {
973 if (o->op_ppaddr != a_pp_deref) {
975 if (oi && (oi->flags & A_HINT_DO)) {
976 a_map_store(o, o->op_ppaddr, oi->next, oi->flags);
977 o->op_ppaddr = a_pp_deref;
985 if (o->op_ppaddr != a_pp_deref)
991 if (!(flags & A_HINT_DEREF)
992 && (flags & A_HINT_DO)
993 && (o->op_private & OPpDEREF || flags & A_HINT_ROOT)) {
994 /* Decide if the expression must autovivify or not. */
995 flags = a_map_resolve(o, oi);
997 if (flags & A_HINT_DEREF)
998 o->op_private = ((o->op_private & ~OPpDEREF) | OPpLVAL_DEFER);
1000 o->op_ppaddr = oi->old_pp;
1004 if ( o->op_ppaddr != a_pp_rv2av
1005 && o->op_ppaddr != a_pp_rv2hv
1006 && o->op_ppaddr != a_pp_rv2hv_simple)
1008 oi = a_map_fetch(o);
1011 if (!(oi->flags & A_HINT_DEREF))
1012 o->op_ppaddr = oi->old_pp;
1023 # if A_HAS_PERL(5, 10, 0)
1028 a_peep_rec(cLOGOPo->op_other);
1032 a_peep_rec(cLOOPo->op_redoop);
1033 a_peep_rec(cLOOPo->op_nextop);
1034 a_peep_rec(cLOOPo->op_lastop);
1036 # if A_HAS_PERL(5, 9, 5)
1038 a_peep_rec(cPMOPo->op_pmstashstartu.op_pmreplstart);
1044 a_peep_rec(cPMOPo->op_pmreplstart);
1047 #endif /* !A_HAS_RPEEP */
1054 STATIC void a_peep(pTHX_ OP *o) {
1057 ptable *seen = MY_CXT.seen;
1059 ptable_seen_clear(seen);
1060 #endif /* !A_HAS_RPEEP */
1062 a_old_peep(aTHX_ o);
1066 /* --- Interpreter setup/teardown ------------------------------------------ */
1068 STATIC U32 a_initialized = 0;
1070 STATIC void a_teardown(pTHX_ void *root) {
1083 # if A_THREADSAFE && A_WORKAROUND_REQUIRE_PROPAGATION
1084 ptable_hints_free(MY_CXT.tbl);
1085 # endif /* A_THREADSAFE && A_WORKAROUND_REQUIRE_PROPAGATION */
1087 ptable_seen_free(MY_CXT.seen);
1088 # endif /* !A_HAS_RPEEP */
1090 #endif /* A_NEED_CXT */
1092 PL_check[OP_PADANY] = MEMBER_TO_FPTR(a_old_ck_padany);
1093 a_old_ck_padany = 0;
1094 PL_check[OP_PADSV] = MEMBER_TO_FPTR(a_old_ck_padsv);
1097 PL_check[OP_AELEM] = MEMBER_TO_FPTR(a_old_ck_aelem);
1099 PL_check[OP_HELEM] = MEMBER_TO_FPTR(a_old_ck_helem);
1101 PL_check[OP_RV2SV] = MEMBER_TO_FPTR(a_old_ck_rv2sv);
1104 PL_check[OP_RV2AV] = MEMBER_TO_FPTR(a_old_ck_rv2av);
1106 PL_check[OP_RV2HV] = MEMBER_TO_FPTR(a_old_ck_rv2hv);
1109 PL_check[OP_ASLICE] = MEMBER_TO_FPTR(a_old_ck_aslice);
1110 a_old_ck_aslice = 0;
1111 PL_check[OP_HSLICE] = MEMBER_TO_FPTR(a_old_ck_hslice);
1112 a_old_ck_hslice = 0;
1114 PL_check[OP_EXISTS] = MEMBER_TO_FPTR(a_old_ck_exists);
1115 a_old_ck_exists = 0;
1116 PL_check[OP_DELETE] = MEMBER_TO_FPTR(a_old_ck_delete);
1117 a_old_ck_delete = 0;
1118 PL_check[OP_KEYS] = MEMBER_TO_FPTR(a_old_ck_keys);
1120 PL_check[OP_VALUES] = MEMBER_TO_FPTR(a_old_ck_values);
1121 a_old_ck_values = 0;
1124 PL_rpeepp = a_old_peep;
1126 PL_peepp = a_old_peep;
1133 STATIC void a_setup(pTHX) {
1134 #define a_setup() a_setup(aTHX)
1141 # if A_THREADSAFE && A_WORKAROUND_REQUIRE_PROPAGATION
1142 MY_CXT.tbl = ptable_new();
1143 MY_CXT.owner = aTHX;
1144 # endif /* A_THREADSAFE && A_WORKAROUND_REQUIRE_PROPAGATION */
1146 MY_CXT.seen = ptable_new();
1147 # endif /* !A_RPEEP */
1149 #endif /* A_NEED_CXT */
1151 a_old_ck_padany = PL_check[OP_PADANY];
1152 PL_check[OP_PADANY] = MEMBER_TO_FPTR(a_ck_padany);
1153 a_old_ck_padsv = PL_check[OP_PADSV];
1154 PL_check[OP_PADSV] = MEMBER_TO_FPTR(a_ck_padsv);
1156 a_old_ck_aelem = PL_check[OP_AELEM];
1157 PL_check[OP_AELEM] = MEMBER_TO_FPTR(a_ck_deref);
1158 a_old_ck_helem = PL_check[OP_HELEM];
1159 PL_check[OP_HELEM] = MEMBER_TO_FPTR(a_ck_deref);
1160 a_old_ck_rv2sv = PL_check[OP_RV2SV];
1161 PL_check[OP_RV2SV] = MEMBER_TO_FPTR(a_ck_deref);
1163 a_old_ck_rv2av = PL_check[OP_RV2AV];
1164 PL_check[OP_RV2AV] = MEMBER_TO_FPTR(a_ck_rv2xv);
1165 a_old_ck_rv2hv = PL_check[OP_RV2HV];
1166 PL_check[OP_RV2HV] = MEMBER_TO_FPTR(a_ck_rv2xv);
1168 a_old_ck_aslice = PL_check[OP_ASLICE];
1169 PL_check[OP_ASLICE] = MEMBER_TO_FPTR(a_ck_xslice);
1170 a_old_ck_hslice = PL_check[OP_HSLICE];
1171 PL_check[OP_HSLICE] = MEMBER_TO_FPTR(a_ck_xslice);
1173 a_old_ck_exists = PL_check[OP_EXISTS];
1174 PL_check[OP_EXISTS] = MEMBER_TO_FPTR(a_ck_root);
1175 a_old_ck_delete = PL_check[OP_DELETE];
1176 PL_check[OP_DELETE] = MEMBER_TO_FPTR(a_ck_root);
1177 a_old_ck_keys = PL_check[OP_KEYS];
1178 PL_check[OP_KEYS] = MEMBER_TO_FPTR(a_ck_root);
1179 a_old_ck_values = PL_check[OP_VALUES];
1180 PL_check[OP_VALUES] = MEMBER_TO_FPTR(a_ck_root);
1183 a_old_peep = PL_rpeepp;
1186 a_old_peep = PL_peepp;
1191 call_atexit(a_teardown, aTHX);
1193 call_atexit(a_teardown, NULL);
1199 STATIC U32 a_booted = 0;
1201 /* --- XS ------------------------------------------------------------------ */
1203 MODULE = autovivification PACKAGE = autovivification
1212 a_op_map = ptable_new();
1214 MUTEX_INIT(&a_op_map_mutex);
1217 PERL_HASH(a_hash, __PACKAGE__, __PACKAGE_LEN__);
1219 stash = gv_stashpvn(__PACKAGE__, __PACKAGE_LEN__, 1);
1220 newCONSTSUB(stash, "A_HINT_STRICT", newSVuv(A_HINT_STRICT));
1221 newCONSTSUB(stash, "A_HINT_WARN", newSVuv(A_HINT_WARN));
1222 newCONSTSUB(stash, "A_HINT_FETCH", newSVuv(A_HINT_FETCH));
1223 newCONSTSUB(stash, "A_HINT_STORE", newSVuv(A_HINT_STORE));
1224 newCONSTSUB(stash, "A_HINT_EXISTS", newSVuv(A_HINT_EXISTS));
1225 newCONSTSUB(stash, "A_HINT_DELETE", newSVuv(A_HINT_DELETE));
1226 newCONSTSUB(stash, "A_HINT_MASK", newSVuv(A_HINT_MASK));
1227 newCONSTSUB(stash, "A_THREADSAFE", newSVuv(A_THREADSAFE));
1228 newCONSTSUB(stash, "A_FORKSAFE", newSVuv(A_FORKSAFE));
1234 #if A_THREADSAFE && (A_WORKAROUND_REQUIRE_PROPAGATION || !A_HAS_RPEEP)
1240 #if A_WORKAROUND_REQUIRE_PROPAGATION
1249 #if A_WORKAROUND_REQUIRE_PROPAGATION
1251 a_ptable_clone_ud ud;
1254 a_ptable_clone_ud_init(ud, t, MY_CXT.owner);
1255 ptable_walk(MY_CXT.tbl, a_ptable_clone, &ud);
1256 a_ptable_clone_ud_deinit(ud);
1265 #if A_WORKAROUND_REQUIRE_PROPAGATION
1267 MY_CXT.owner = aTHX;
1273 reap(3, a_thread_cleanup, NULL);
1282 RETVAL = a_tag(SvOK(hint) ? SvUV(hint) : 0);
1292 RETVAL = newSVuv(a_detag(tag));