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 #ifndef A_HAS_OPFREEHOOK
33 # define A_HAS_OPFREEHOOK A_HAS_PERL(5, 12, 0)
36 /* ... Thread safety and multiplicity ...................................... */
38 /* Always safe when the workaround isn't needed */
39 #if !A_WORKAROUND_REQUIRE_PROPAGATION
42 /* Otherwise, safe unless Makefile.PL says it's Win32 */
43 #elif !defined(A_FORKSAFE)
47 #ifndef A_MULTIPLICITY
48 # if defined(MULTIPLICITY) || defined(PERL_IMPLICIT_CONTEXT)
49 # define A_MULTIPLICITY 1
51 # define A_MULTIPLICITY 0
56 # define tTHX PerlInterpreter*
59 #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))
60 # define A_THREADSAFE 1
62 # define MY_CXT_CLONE \
64 my_cxt_t *my_cxtp = (my_cxt_t*)SvPVX(newSV(sizeof(my_cxt_t)-1)); \
65 Copy(INT2PTR(my_cxt_t*, SvUV(my_cxt_sv)), my_cxtp, 1, my_cxt_t); \
66 sv_setuv(my_cxt_sv, PTR2UV(my_cxtp))
69 # define A_THREADSAFE 0
71 # define dMY_CXT dNOOP
73 # define MY_CXT a_globaldata
75 # define START_MY_CXT STATIC my_cxt_t MY_CXT;
77 # define MY_CXT_INIT NOOP
79 # define MY_CXT_CLONE NOOP
82 #if defined(OP_CHECK_MUTEX_LOCK) && defined(OP_CHECK_MUTEX_UNLOCK)
83 # define A_CHECK_MUTEX_LOCK OP_CHECK_MUTEX_LOCK
84 # define A_CHECK_MUTEX_UNLOCK OP_CHECK_MUTEX_UNLOCK
86 # define A_CHECK_MUTEX_LOCK OP_REFCNT_LOCK
87 # define A_CHECK_MUTEX_UNLOCK OP_REFCNT_UNLOCK
90 typedef OP *(*a_ck_t)(pTHX_ OP *);
92 #ifdef wrap_op_checker
94 # define a_ck_replace(T, NC, OCP) wrap_op_checker((T), (NC), (OCP))
98 STATIC void a_ck_replace(pTHX_ OPCODE type, a_ck_t new_ck, a_ck_t *old_ck_p) {
99 #define a_ck_replace(T, NC, OCP) a_ck_replace(aTHX_ (T), (NC), (OCP))
102 *old_ck_p = PL_check[type];
103 PL_check[type] = new_ck;
105 A_CHECK_MUTEX_UNLOCK;
110 STATIC void a_ck_restore(pTHX_ OPCODE type, a_ck_t *old_ck_p) {
111 #define a_ck_restore(T, OCP) a_ck_restore(aTHX_ (T), (OCP))
114 PL_check[type] = *old_ck_p;
117 A_CHECK_MUTEX_UNLOCK;
120 /* --- Helpers ------------------------------------------------------------- */
122 /* ... Thread-safe hints ................................................... */
124 #if A_WORKAROUND_REQUIRE_PROPAGATION
131 #define A_HINT_FREE(H) PerlMemShared_free(H)
135 #define PTABLE_NAME ptable_hints
136 #define PTABLE_VAL_FREE(V) A_HINT_FREE(V)
145 #define ptable_hints_store(T, K, V) ptable_hints_store(aTHX_ (T), (K), (V))
146 #define ptable_hints_free(T) ptable_hints_free(aTHX_ (T))
148 #endif /* A_THREADSAFE */
150 #endif /* A_WORKAROUND_REQUIRE_PROPAGATION */
152 #define PTABLE_NAME ptable_seen
153 #define PTABLE_VAL_FREE(V) NOOP
157 /* PerlMemShared_free() needs the [ap]PTBLMS_? default values */
158 #define ptable_seen_store(T, K, V) ptable_seen_store(aPTBLMS_ (T), (K), (V))
159 #define ptable_seen_clear(T) ptable_seen_clear(aPTBLMS_ (T))
160 #define ptable_seen_free(T) ptable_seen_free(aPTBLMS_ (T))
162 #define MY_CXT_KEY __PACKAGE__ "::_guts" XS_VERSION
165 #if A_THREADSAFE && A_WORKAROUND_REQUIRE_PROPAGATION
166 ptable *tbl; /* It really is a ptable_hints */
168 #endif /* A_THREADSAFE && A_WORKAROUND_REQUIRE_PROPAGATION */
169 ptable *seen; /* It really is a ptable_seen */
176 #if A_WORKAROUND_REQUIRE_PROPAGATION
180 #if A_HAS_PERL(5, 13, 2)
181 CLONE_PARAMS *params;
187 #if A_HAS_PERL(5, 13, 2)
188 # define a_ptable_clone_ud_init(U, T, O) \
190 (U).params = Perl_clone_params_new((O), aTHX)
191 # define a_ptable_clone_ud_deinit(U) Perl_clone_params_del((U).params)
192 # define a_dup_inc(S, U) SvREFCNT_inc(sv_dup((S), (U)->params))
194 # define a_ptable_clone_ud_init(U, T, O) \
196 (U).params.stashes = newAV(); \
197 (U).params.flags = 0; \
198 (U).params.proto_perl = (O)
199 # define a_ptable_clone_ud_deinit(U) SvREFCNT_dec((U).params.stashes)
200 # define a_dup_inc(S, U) SvREFCNT_inc(sv_dup((S), &((U)->params)))
203 STATIC void a_ptable_clone(pTHX_ ptable_ent *ent, void *ud_) {
204 a_ptable_clone_ud *ud = ud_;
205 a_hint_t *h1 = ent->val;
208 h2 = PerlMemShared_malloc(sizeof *h2);
210 h2->require_tag = PTR2IV(a_dup_inc(INT2PTR(SV *, h1->require_tag), ud));
212 ptable_hints_store(ud->tbl, ent->key, h2);
215 #endif /* A_WORKAROUND_REQUIRE_PROPAGATION */
219 STATIC void a_thread_cleanup(pTHX_ void *ud) {
222 #if A_WORKAROUND_REQUIRE_PROPAGATION
223 ptable_hints_free(MY_CXT.tbl);
224 #endif /* A_WORKAROUND_REQUIRE_PROPAGATION */
225 ptable_seen_free(MY_CXT.seen);
228 #endif /* A_THREADSAFE */
230 #if A_WORKAROUND_REQUIRE_PROPAGATION
232 STATIC IV a_require_tag(pTHX) {
233 #define a_require_tag() a_require_tag(aTHX)
234 const CV *cv, *outside;
239 /* If for some reason the pragma is operational at run-time, try to discover
240 * the current cv in use. */
243 for (si = PL_curstackinfo; si; si = si->si_prev) {
246 for (cxix = si->si_cxix; cxix >= 0; --cxix) {
247 const PERL_CONTEXT *cx = si->si_cxstack + cxix;
249 switch (CxTYPE(cx)) {
252 /* The propagation workaround is only needed up to 5.10.0 and at that
253 * time format and sub contexts were still identical. And even later the
254 * cv members offsets should have been kept the same. */
256 goto get_enclosing_cv;
258 cv = cx->blk_eval.cv;
259 goto get_enclosing_cv;
270 for (outside = CvOUTSIDE(cv); outside; outside = CvOUTSIDE(cv))
276 STATIC SV *a_tag(pTHX_ UV bits) {
277 #define a_tag(B) a_tag(aTHX_ (B))
280 h = PerlMemShared_malloc(sizeof *h);
282 h->require_tag = a_require_tag();
287 /* We only need for the key to be an unique tag for looking up the value later
288 * Allocated memory provides convenient unique identifiers, so that's why we
289 * use the hint as the key itself. */
290 ptable_hints_store(MY_CXT.tbl, h, h);
292 #endif /* A_THREADSAFE */
294 return newSViv(PTR2IV(h));
297 STATIC UV a_detag(pTHX_ const SV *hint) {
298 #define a_detag(H) a_detag(aTHX_ (H))
301 if (!(hint && SvIOK(hint)))
304 h = INT2PTR(a_hint_t *, SvIVX(hint));
308 h = ptable_fetch(MY_CXT.tbl, h);
310 #endif /* A_THREADSAFE */
312 if (a_require_tag() != h->require_tag)
318 #else /* A_WORKAROUND_REQUIRE_PROPAGATION */
320 #define a_tag(B) newSVuv(B)
321 /* PVs fetched from the hints chain have their SvLEN set to zero, so get the UV
328 ? sv_2uv(SvLEN(H) ? (H) : sv_mortalcopy(H)) \
334 #endif /* !A_WORKAROUND_REQUIRE_PROPAGATION */
336 /* Used both for hints and op flags */
337 #define A_HINT_STRICT 1
338 #define A_HINT_WARN 2
339 #define A_HINT_FETCH 4
340 #define A_HINT_STORE 8
341 #define A_HINT_EXISTS 16
342 #define A_HINT_DELETE 32
343 #define A_HINT_NOTIFY (A_HINT_STRICT|A_HINT_WARN)
344 #define A_HINT_DO (A_HINT_FETCH|A_HINT_STORE|A_HINT_EXISTS|A_HINT_DELETE)
345 #define A_HINT_MASK (A_HINT_NOTIFY|A_HINT_DO)
347 /* Only used in op flags */
348 #define A_HINT_ROOT 64
349 #define A_HINT_DEREF 128
351 STATIC U32 a_hash = 0;
353 STATIC UV a_hint(pTHX) {
354 #define a_hint() a_hint(aTHX)
356 #ifdef cop_hints_fetch_pvn
357 hint = cop_hints_fetch_pvn(PL_curcop, __PACKAGE__, __PACKAGE_LEN__, a_hash, 0);
358 #elif A_HAS_PERL(5, 9, 5)
359 hint = Perl_refcounted_he_fetch(aTHX_ PL_curcop->cop_hints_hash,
361 __PACKAGE__, __PACKAGE_LEN__,
365 SV **val = hv_fetch(GvHV(PL_hintgv), __PACKAGE__, __PACKAGE_LEN__, 0);
370 return a_detag(hint);
373 /* ... op => info map ...................................................... */
381 #define PTABLE_NAME ptable_map
382 #define PTABLE_VAL_FREE(V) PerlMemShared_free(V)
386 /* PerlMemShared_free() needs the [ap]PTBLMS_? default values */
387 #define ptable_map_store(T, K, V) ptable_map_store(aPTBLMS_ (T), (K), (V))
388 #define ptable_map_delete(T, K) ptable_map_delete(aPTBLMS_ (T), (K))
390 STATIC ptable *a_op_map = NULL;
394 #define dA_MAP_THX a_op_info a_op_map_tmp_oi
396 STATIC perl_mutex a_op_map_mutex;
398 #define A_LOCK(M) MUTEX_LOCK(M)
399 #define A_UNLOCK(M) MUTEX_UNLOCK(M)
401 STATIC const a_op_info *a_map_fetch(const OP *o, a_op_info *oi) {
402 const a_op_info *val;
404 A_LOCK(&a_op_map_mutex);
406 val = ptable_fetch(a_op_map, o);
412 A_UNLOCK(&a_op_map_mutex);
417 #define a_map_fetch(O) a_map_fetch((O), &a_op_map_tmp_oi)
419 #else /* USE_ITHREADS */
421 #define dA_MAP_THX dNOOP
423 #define A_LOCK(M) NOOP
424 #define A_UNLOCK(M) NOOP
426 #define a_map_fetch(O) ptable_fetch(a_op_map, (O))
428 #endif /* !USE_ITHREADS */
430 STATIC const a_op_info *a_map_store_locked(pPTBLMS_ const OP *o, OP *(*old_pp)(pTHX), void *next, UV flags) {
431 #define a_map_store_locked(O, PP, N, F) a_map_store_locked(aPTBLMS_ (O), (PP), (N), (F))
434 if (!(oi = ptable_fetch(a_op_map, o))) {
435 oi = PerlMemShared_malloc(sizeof *oi);
436 ptable_map_store(a_op_map, o, oi);
446 STATIC void a_map_store(pPTBLMS_ const OP *o, OP *(*old_pp)(pTHX), void *next, UV flags) {
447 #define a_map_store(O, PP, N, F) a_map_store(aPTBLMS_ (O), (PP), (N), (F))
448 A_LOCK(&a_op_map_mutex);
450 a_map_store_locked(o, old_pp, next, flags);
452 A_UNLOCK(&a_op_map_mutex);
455 STATIC void a_map_delete(pTHX_ const OP *o) {
456 #define a_map_delete(O) a_map_delete(aTHX_ (O))
457 A_LOCK(&a_op_map_mutex);
459 ptable_map_delete(a_op_map, o);
461 A_UNLOCK(&a_op_map_mutex);
464 STATIC const OP *a_map_descend(const OP *o) {
465 switch (PL_opargs[o->op_type] & OA_CLASS_MASK) {
469 case OA_BASEOP_OR_UNOP:
470 return cUNOPo->op_first;
473 return cLISTOPo->op_last;
479 STATIC void a_map_store_root(pPTBLMS_ const OP *root, OP *(*old_pp)(pTHX), UV flags) {
480 #define a_map_store_root(R, PP, F) a_map_store_root(aPTBLMS_ (R), (PP), (F))
481 const a_op_info *roi;
485 A_LOCK(&a_op_map_mutex);
487 roi = a_map_store_locked(o, old_pp, (OP *) root, flags | A_HINT_ROOT);
489 while (o->op_flags & OPf_KIDS) {
490 o = a_map_descend(o);
493 if ((oi = ptable_fetch(a_op_map, o))) {
494 oi->flags &= ~A_HINT_ROOT;
495 oi->next = (a_op_info *) roi;
500 A_UNLOCK(&a_op_map_mutex);
505 STATIC void a_map_update_flags_topdown(const OP *root, UV flags) {
509 A_LOCK(&a_op_map_mutex);
511 flags &= ~A_HINT_ROOT;
514 if ((oi = ptable_fetch(a_op_map, o)))
515 oi->flags = (oi->flags & A_HINT_ROOT) | flags;
516 if (!(o->op_flags & OPf_KIDS))
518 o = a_map_descend(o);
521 A_UNLOCK(&a_op_map_mutex);
526 #define a_map_cancel(R) a_map_update_flags_topdown((R), 0)
528 STATIC void a_map_update_flags_bottomup(const OP *o, UV flags, UV rflags) {
531 A_LOCK(&a_op_map_mutex);
533 flags &= ~A_HINT_ROOT;
534 rflags |= A_HINT_ROOT;
536 oi = ptable_fetch(a_op_map, o);
537 while (!(oi->flags & A_HINT_ROOT)) {
543 A_UNLOCK(&a_op_map_mutex);
548 /* ... Decide whether this expression should be autovivified or not ........ */
550 STATIC UV a_map_resolve(const OP *o, const a_op_info *oi) {
551 UV flags = 0, rflags;
553 const a_op_info *roi = oi;
555 while (!(roi->flags & A_HINT_ROOT))
560 rflags = roi->flags & ~A_HINT_ROOT;
565 if (root->op_flags & OPf_MOD) {
566 if (rflags & A_HINT_STORE)
567 flags = (A_HINT_STORE|A_HINT_DEREF);
568 } else if (rflags & A_HINT_FETCH)
569 flags = (A_HINT_FETCH|A_HINT_DEREF);
573 a_map_update_flags_bottomup(o, 0, 0);
577 flags |= (rflags & A_HINT_NOTIFY);
578 a_map_update_flags_bottomup(o, flags, 0);
580 return oi->flags & A_HINT_ROOT ? 0 : flags;
583 /* ... Inspired from pp_defined() .......................................... */
585 STATIC int a_undef(pTHX_ SV *sv) {
586 #define a_undef(S) a_undef(aTHX_ (S))
587 switch (SvTYPE(sv)) {
591 if (AvMAX(sv) >= 0 || SvGMAGICAL(sv)
592 || (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied)))
596 if (HvARRAY(sv) || SvGMAGICAL(sv)
597 || (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied)))
609 /* --- PP functions -------------------------------------------------------- */
611 /* Be aware that we restore PL_op->op_ppaddr from the pointer table old_pp
612 * value, another extension might have saved our pp replacement as the ppaddr
613 * for this op, so this doesn't ensure that our function will never be called
614 * again. That's why we don't remove the op info from our map, so that it can
615 * still run correctly if required. */
617 /* ... pp_rv2av ............................................................ */
619 STATIC OP *a_pp_rv2av(pTHX) {
624 oi = a_map_fetch(PL_op);
626 if (oi->flags & A_HINT_DEREF) {
628 /* We always need to push an empty array to fool the pp_aelem() that comes
632 av = sv_2mortal((SV *) newAV());
638 return oi->old_pp(aTHX);
641 /* ... pp_rv2hv ............................................................ */
643 STATIC OP *a_pp_rv2hv_simple(pTHX) {
648 oi = a_map_fetch(PL_op);
650 if (oi->flags & A_HINT_DEREF) {
655 return oi->old_pp(aTHX);
658 STATIC OP *a_pp_rv2hv(pTHX) {
663 oi = a_map_fetch(PL_op);
665 if (oi->flags & A_HINT_DEREF) {
669 hv = sv_2mortal((SV *) newHV());
675 return oi->old_pp(aTHX);
678 /* ... pp_deref (aelem,helem,rv2sv,padsv) .................................. */
680 STATIC OP *a_pp_deref(pTHX) {
686 oi = a_map_fetch(PL_op);
689 if (flags & A_HINT_DEREF) {
692 o = oi->old_pp(aTHX);
694 if (flags & (A_HINT_NOTIFY|A_HINT_STORE)) {
697 if (flags & A_HINT_STRICT)
698 croak("Reference vivification forbidden");
699 else if (flags & A_HINT_WARN)
700 warn("Reference was vivified");
701 else /* A_HINT_STORE */
702 croak("Can't vivify reference");
709 return oi->old_pp(aTHX);
712 /* ... pp_root (exists,delete,keys,values) ................................. */
714 STATIC OP *a_pp_root_unop(pTHX) {
719 /* Can only be reached by keys or values */
720 if (GIMME_V == G_SCALAR) {
729 const a_op_info *oi = a_map_fetch(PL_op);
730 return oi->old_pp(aTHX);
734 STATIC OP *a_pp_root_binop(pTHX) {
737 if (a_undef(TOPm1s)) {
740 if (PL_op->op_type == OP_EXISTS)
748 const a_op_info *oi = a_map_fetch(PL_op);
749 return oi->old_pp(aTHX);
753 /* --- Check functions ----------------------------------------------------- */
755 STATIC void a_recheck_rv2xv(pTHX_ OP *o, OPCODE type, OP *(*new_pp)(pTHX)) {
756 #define a_recheck_rv2xv(O, T, PP) a_recheck_rv2xv(aTHX_ (O), (T), (PP))
758 if (o->op_type == type && o->op_ppaddr != new_pp
759 && cUNOPo->op_first->op_type != OP_GV) {
761 const a_op_info *oi = a_map_fetch(o);
763 a_map_store(o, o->op_ppaddr, oi->next, oi->flags);
764 o->op_ppaddr = new_pp;
771 /* ... ck_pad{any,sv} ...................................................... */
773 /* Sadly, the padsv OPs we are interested in don't trigger the padsv check
774 * function, but are instead manually mutated from a padany. So we store
775 * the op entry in the op map in the padany check function, and we set their
776 * op_ppaddr member in our peephole optimizer replacement below. */
778 STATIC OP *(*a_old_ck_padany)(pTHX_ OP *) = 0;
780 STATIC OP *a_ck_padany(pTHX_ OP *o) {
783 o = a_old_ck_padany(aTHX_ o);
786 if (hint & A_HINT_DO) {
787 a_map_store_root(o, o->op_ppaddr, hint);
788 #if !A_HAS_OPFREEHOOK
797 STATIC OP *(*a_old_ck_padsv)(pTHX_ OP *) = 0;
799 STATIC OP *a_ck_padsv(pTHX_ OP *o) {
802 o = a_old_ck_padsv(aTHX_ o);
805 if (hint & A_HINT_DO) {
806 a_map_store_root(o, o->op_ppaddr, hint);
807 o->op_ppaddr = a_pp_deref;
808 #if !A_HAS_OPFREEHOOK
817 /* ... ck_deref (aelem,helem,rv2sv) ........................................ */
819 /* Those ops appear both at the root and inside an expression but there's no
820 * way to distinguish both situations. Worse, we can't even know if we are in a
821 * modifying context, so the expression can't be resolved yet. It will be at the
822 * first invocation of a_pp_deref() for this expression. */
824 STATIC OP *(*a_old_ck_aelem)(pTHX_ OP *) = 0;
825 STATIC OP *(*a_old_ck_helem)(pTHX_ OP *) = 0;
826 STATIC OP *(*a_old_ck_rv2sv)(pTHX_ OP *) = 0;
828 STATIC OP *a_ck_deref(pTHX_ OP *o) {
829 OP * (*old_ck)(pTHX_ OP *o) = 0;
832 switch (o->op_type) {
834 old_ck = a_old_ck_aelem;
835 if ((hint & A_HINT_DO) && !(hint & A_HINT_STRICT))
836 a_recheck_rv2xv(cUNOPo->op_first, OP_RV2AV, a_pp_rv2av);
839 old_ck = a_old_ck_helem;
840 if ((hint & A_HINT_DO) && !(hint & A_HINT_STRICT))
841 a_recheck_rv2xv(cUNOPo->op_first, OP_RV2HV, a_pp_rv2hv_simple);
844 old_ck = a_old_ck_rv2sv;
849 if (hint & A_HINT_DO) {
850 a_map_store_root(o, o->op_ppaddr, hint);
851 o->op_ppaddr = a_pp_deref;
852 #if !A_HAS_OPFREEHOOK
861 /* ... ck_rv2xv (rv2av,rv2hv) .............................................. */
863 /* Those ops also appear both inisde and at the root, hence the caveats for
864 * a_ck_deref() still apply here. Since a padsv/rv2sv must appear before a
865 * rv2[ah]v, resolution is handled by the first call to a_pp_deref() in the
868 STATIC OP *(*a_old_ck_rv2av)(pTHX_ OP *) = 0;
869 STATIC OP *(*a_old_ck_rv2hv)(pTHX_ OP *) = 0;
871 STATIC OP *a_ck_rv2xv(pTHX_ OP *o) {
872 OP * (*old_ck)(pTHX_ OP *o) = 0;
873 OP * (*new_pp)(pTHX) = 0;
876 switch (o->op_type) {
877 case OP_RV2AV: old_ck = a_old_ck_rv2av; new_pp = a_pp_rv2av; break;
878 case OP_RV2HV: old_ck = a_old_ck_rv2hv; new_pp = a_pp_rv2hv_simple; break;
882 if (cUNOPo->op_first->op_type == OP_GV)
886 if (hint & A_HINT_DO && !(hint & A_HINT_STRICT)) {
887 a_map_store_root(o, o->op_ppaddr, hint);
888 o->op_ppaddr = new_pp;
889 #if !A_HAS_OPFREEHOOK
898 /* ... ck_xslice (aslice,hslice) ........................................... */
900 /* I think those are only found at the root, but there's nothing that really
901 * prevent them to be inside the expression too. We only need to update the
902 * root so that the rest of the expression will see the right context when
903 * resolving. That's why we don't replace the ppaddr. */
905 STATIC OP *(*a_old_ck_aslice)(pTHX_ OP *) = 0;
906 STATIC OP *(*a_old_ck_hslice)(pTHX_ OP *) = 0;
908 STATIC OP *a_ck_xslice(pTHX_ OP *o) {
909 OP * (*old_ck)(pTHX_ OP *o) = 0;
912 switch (o->op_type) {
914 old_ck = a_old_ck_aslice;
917 old_ck = a_old_ck_hslice;
918 if (hint & A_HINT_DO)
919 a_recheck_rv2xv(cUNOPo->op_first->op_sibling, OP_RV2HV, a_pp_rv2hv);
924 if (hint & A_HINT_DO) {
925 a_map_store_root(o, 0, hint);
926 #if !A_HAS_OPFREEHOOK
935 /* ... ck_root (exists,delete,keys,values) ................................. */
937 /* Those ops are only found at the root of a dereferencing expression. We can
938 * then resolve at compile time if vivification must take place or not. */
940 STATIC OP *(*a_old_ck_exists)(pTHX_ OP *) = 0;
941 STATIC OP *(*a_old_ck_delete)(pTHX_ OP *) = 0;
942 STATIC OP *(*a_old_ck_keys) (pTHX_ OP *) = 0;
943 STATIC OP *(*a_old_ck_values)(pTHX_ OP *) = 0;
945 STATIC OP *a_ck_root(pTHX_ OP *o) {
946 OP * (*old_ck)(pTHX_ OP *o) = 0;
947 OP * (*new_pp)(pTHX) = 0;
948 bool enabled = FALSE;
951 switch (o->op_type) {
953 old_ck = a_old_ck_exists;
954 new_pp = a_pp_root_binop;
955 enabled = hint & A_HINT_EXISTS;
958 old_ck = a_old_ck_delete;
959 new_pp = a_pp_root_binop;
960 enabled = hint & A_HINT_DELETE;
963 old_ck = a_old_ck_keys;
964 new_pp = a_pp_root_unop;
965 enabled = hint & A_HINT_FETCH;
968 old_ck = a_old_ck_values;
969 new_pp = a_pp_root_unop;
970 enabled = hint & A_HINT_FETCH;
975 if (hint & A_HINT_DO) {
977 a_map_update_flags_topdown(o, hint | A_HINT_DEREF);
978 a_map_store_root(o, o->op_ppaddr, hint);
979 o->op_ppaddr = new_pp;
983 #if !A_HAS_OPFREEHOOK
992 /* ... Our peephole optimizer .............................................. */
994 STATIC peep_t a_old_peep = 0; /* This is actually the rpeep past 5.13.5 */
996 STATIC void a_peep_rec(pTHX_ OP *o, ptable *seen);
998 STATIC void a_peep_rec(pTHX_ OP *o, ptable *seen) {
999 #define a_peep_rec(O) a_peep_rec(aTHX_ (O), seen)
1000 for (; o; o = o->op_next) {
1002 const a_op_info *oi = NULL;
1005 if (ptable_fetch(seen, o))
1007 ptable_seen_store(seen, o, o);
1009 switch (o->op_type) {
1011 if (o->op_ppaddr != a_pp_deref) {
1012 oi = a_map_fetch(o);
1013 if (oi && (oi->flags & A_HINT_DO)) {
1014 a_map_store(o, o->op_ppaddr, oi->next, oi->flags);
1015 o->op_ppaddr = a_pp_deref;
1023 if (o->op_ppaddr != a_pp_deref)
1025 oi = a_map_fetch(o);
1029 if (!(flags & A_HINT_DEREF)
1030 && (flags & A_HINT_DO)
1031 && (o->op_private & OPpDEREF || flags & A_HINT_ROOT)) {
1032 /* Decide if the expression must autovivify or not. */
1033 flags = a_map_resolve(o, oi);
1035 if (flags & A_HINT_DEREF)
1036 o->op_private = ((o->op_private & ~OPpDEREF) | OPpLVAL_DEFER);
1038 o->op_ppaddr = oi->old_pp;
1042 if ( o->op_ppaddr != a_pp_rv2av
1043 && o->op_ppaddr != a_pp_rv2hv
1044 && o->op_ppaddr != a_pp_rv2hv_simple)
1046 oi = a_map_fetch(o);
1049 if (!(oi->flags & A_HINT_DEREF))
1050 o->op_ppaddr = oi->old_pp;
1061 # if A_HAS_PERL(5, 10, 0)
1066 a_peep_rec(cLOGOPo->op_other);
1070 a_peep_rec(cLOOPo->op_redoop);
1071 a_peep_rec(cLOOPo->op_nextop);
1072 a_peep_rec(cLOOPo->op_lastop);
1074 # if A_HAS_PERL(5, 9, 5)
1076 a_peep_rec(cPMOPo->op_pmstashstartu.op_pmreplstart);
1082 a_peep_rec(cPMOPo->op_pmreplstart);
1085 #endif /* !A_HAS_RPEEP */
1092 STATIC void a_peep(pTHX_ OP *o) {
1094 ptable *seen = MY_CXT.seen;
1096 a_old_peep(aTHX_ o);
1098 ptable_seen_clear(seen);
1100 ptable_seen_clear(seen);
1103 /* ... Our op free hook (when available) ................................... */
1105 #if A_HAS_OPFREEHOOK
1107 STATIC void (*a_old_opfreehook)(pTHX_ OP *) = 0;
1109 STATIC void a_opfreehook(pTHX_ OP *o) {
1112 if (a_old_opfreehook)
1113 a_old_opfreehook(aTHX_ o);
1118 /* --- Interpreter setup/teardown ------------------------------------------ */
1120 STATIC U32 a_initialized = 0;
1122 STATIC void a_teardown(pTHX_ void *root) {
1134 # if A_THREADSAFE && A_WORKAROUND_REQUIRE_PROPAGATION
1135 ptable_hints_free(MY_CXT.tbl);
1136 # endif /* A_THREADSAFE && A_WORKAROUND_REQUIRE_PROPAGATION */
1137 ptable_seen_free(MY_CXT.seen);
1140 a_ck_restore(OP_PADANY, &a_old_ck_padany);
1141 a_ck_restore(OP_PADSV, &a_old_ck_padsv);
1143 a_ck_restore(OP_AELEM, &a_old_ck_aelem);
1144 a_ck_restore(OP_HELEM, &a_old_ck_helem);
1145 a_ck_restore(OP_RV2SV, &a_old_ck_rv2sv);
1147 a_ck_restore(OP_RV2AV, &a_old_ck_rv2av);
1148 a_ck_restore(OP_RV2HV, &a_old_ck_rv2hv);
1150 a_ck_restore(OP_ASLICE, &a_old_ck_aslice);
1151 a_ck_restore(OP_HSLICE, &a_old_ck_hslice);
1153 a_ck_restore(OP_EXISTS, &a_old_ck_exists);
1154 a_ck_restore(OP_DELETE, &a_old_ck_delete);
1155 a_ck_restore(OP_KEYS, &a_old_ck_keys);
1156 a_ck_restore(OP_VALUES, &a_old_ck_values);
1159 PL_rpeepp = a_old_peep;
1161 PL_peepp = a_old_peep;
1165 #if A_HAS_OPFREEHOOK
1166 PL_opfreehook = a_old_opfreehook;
1167 a_old_opfreehook = 0;
1173 STATIC void a_setup(pTHX) {
1174 #define a_setup() a_setup(aTHX)
1180 # if A_THREADSAFE && A_WORKAROUND_REQUIRE_PROPAGATION
1181 MY_CXT.tbl = ptable_new();
1182 MY_CXT.owner = aTHX;
1183 # endif /* A_THREADSAFE && A_WORKAROUND_REQUIRE_PROPAGATION */
1184 MY_CXT.seen = ptable_new();
1187 a_ck_replace(OP_PADANY, a_ck_padany, &a_old_ck_padany);
1188 a_ck_replace(OP_PADSV, a_ck_padsv, &a_old_ck_padsv);
1190 a_ck_replace(OP_AELEM, a_ck_deref, &a_old_ck_aelem);
1191 a_ck_replace(OP_HELEM, a_ck_deref, &a_old_ck_helem);
1192 a_ck_replace(OP_RV2SV, a_ck_deref, &a_old_ck_rv2sv);
1194 a_ck_replace(OP_RV2AV, a_ck_rv2xv, &a_old_ck_rv2av);
1195 a_ck_replace(OP_RV2HV, a_ck_rv2xv, &a_old_ck_rv2hv);
1197 a_ck_replace(OP_ASLICE, a_ck_xslice, &a_old_ck_aslice);
1198 a_ck_replace(OP_HSLICE, a_ck_xslice, &a_old_ck_hslice);
1200 a_ck_replace(OP_EXISTS, a_ck_root, &a_old_ck_exists);
1201 a_ck_replace(OP_DELETE, a_ck_root, &a_old_ck_delete);
1202 a_ck_replace(OP_KEYS, a_ck_root, &a_old_ck_keys);
1203 a_ck_replace(OP_VALUES, a_ck_root, &a_old_ck_values);
1206 a_old_peep = PL_rpeepp;
1209 a_old_peep = PL_peepp;
1213 #if A_HAS_OPFREEHOOK
1214 a_old_opfreehook = PL_opfreehook;
1215 PL_opfreehook = a_opfreehook;
1219 call_atexit(a_teardown, aTHX);
1221 call_atexit(a_teardown, NULL);
1227 STATIC U32 a_booted = 0;
1229 /* --- XS ------------------------------------------------------------------ */
1231 MODULE = autovivification PACKAGE = autovivification
1240 a_op_map = ptable_new();
1242 MUTEX_INIT(&a_op_map_mutex);
1245 PERL_HASH(a_hash, __PACKAGE__, __PACKAGE_LEN__);
1247 stash = gv_stashpvn(__PACKAGE__, __PACKAGE_LEN__, 1);
1248 newCONSTSUB(stash, "A_HINT_STRICT", newSVuv(A_HINT_STRICT));
1249 newCONSTSUB(stash, "A_HINT_WARN", newSVuv(A_HINT_WARN));
1250 newCONSTSUB(stash, "A_HINT_FETCH", newSVuv(A_HINT_FETCH));
1251 newCONSTSUB(stash, "A_HINT_STORE", newSVuv(A_HINT_STORE));
1252 newCONSTSUB(stash, "A_HINT_EXISTS", newSVuv(A_HINT_EXISTS));
1253 newCONSTSUB(stash, "A_HINT_DELETE", newSVuv(A_HINT_DELETE));
1254 newCONSTSUB(stash, "A_HINT_MASK", newSVuv(A_HINT_MASK));
1255 newCONSTSUB(stash, "A_THREADSAFE", newSVuv(A_THREADSAFE));
1256 newCONSTSUB(stash, "A_FORKSAFE", newSVuv(A_FORKSAFE));
1268 #if A_WORKAROUND_REQUIRE_PROPAGATION
1275 #if A_WORKAROUND_REQUIRE_PROPAGATION
1277 a_ptable_clone_ud ud;
1280 a_ptable_clone_ud_init(ud, t, MY_CXT.owner);
1281 ptable_walk(MY_CXT.tbl, a_ptable_clone, &ud);
1282 a_ptable_clone_ud_deinit(ud);
1289 #if A_WORKAROUND_REQUIRE_PROPAGATION
1291 MY_CXT.owner = aTHX;
1295 reap(3, a_thread_cleanup, NULL);
1298 #endif /* A_THREADSAFE */
1304 RETVAL = a_tag(SvOK(hint) ? SvUV(hint) : 0);
1314 RETVAL = newSVuv(a_detag(tag));