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 #if defined(OP_CHECK_MUTEX_LOCK) && defined(OP_CHECK_MUTEX_UNLOCK)
79 # define A_CHECK_MUTEX_LOCK OP_CHECK_MUTEX_LOCK
80 # define A_CHECK_MUTEX_UNLOCK OP_CHECK_MUTEX_UNLOCK
82 # define A_CHECK_MUTEX_LOCK OP_REFCNT_LOCK
83 # define A_CHECK_MUTEX_UNLOCK OP_REFCNT_UNLOCK
86 typedef OP *(*a_ck_t)(pTHX_ OP *);
88 #ifdef wrap_op_checker
90 # define a_ck_replace(T, NC, OCP) wrap_op_checker((T), (NC), (OCP))
94 STATIC void a_ck_replace(pTHX_ OPCODE type, a_ck_t new_ck, a_ck_t *old_ck_p) {
95 #define a_ck_replace(T, NC, OCP) a_ck_replace(aTHX_ (T), (NC), (OCP))
98 *old_ck_p = PL_check[type];
99 PL_check[type] = new_ck;
101 A_CHECK_MUTEX_UNLOCK;
106 STATIC void a_ck_restore(pTHX_ OPCODE type, a_ck_t *old_ck_p) {
107 #define a_ck_restore(T, OCP) a_ck_restore(aTHX_ (T), (OCP))
110 PL_check[type] = *old_ck_p;
113 A_CHECK_MUTEX_UNLOCK;
116 /* --- Helpers ------------------------------------------------------------- */
118 /* ... Thread-safe hints ................................................... */
120 #if A_WORKAROUND_REQUIRE_PROPAGATION
127 #define A_HINT_FREE(H) PerlMemShared_free(H)
131 #define PTABLE_NAME ptable_hints
132 #define PTABLE_VAL_FREE(V) A_HINT_FREE(V)
141 #define ptable_hints_store(T, K, V) ptable_hints_store(aTHX_ (T), (K), (V))
142 #define ptable_hints_free(T) ptable_hints_free(aTHX_ (T))
144 #endif /* A_THREADSAFE */
146 #endif /* A_WORKAROUND_REQUIRE_PROPAGATION */
148 #define PTABLE_NAME ptable_seen
149 #define PTABLE_VAL_FREE(V) NOOP
153 /* PerlMemShared_free() needs the [ap]PTBLMS_? default values */
154 #define ptable_seen_store(T, K, V) ptable_seen_store(aPTBLMS_ (T), (K), (V))
155 #define ptable_seen_clear(T) ptable_seen_clear(aPTBLMS_ (T))
156 #define ptable_seen_free(T) ptable_seen_free(aPTBLMS_ (T))
158 #define MY_CXT_KEY __PACKAGE__ "::_guts" XS_VERSION
161 #if A_THREADSAFE && A_WORKAROUND_REQUIRE_PROPAGATION
162 ptable *tbl; /* It really is a ptable_hints */
164 #endif /* A_THREADSAFE && A_WORKAROUND_REQUIRE_PROPAGATION */
165 ptable *seen; /* It really is a ptable_seen */
172 #if A_WORKAROUND_REQUIRE_PROPAGATION
176 #if A_HAS_PERL(5, 13, 2)
177 CLONE_PARAMS *params;
183 #if A_HAS_PERL(5, 13, 2)
184 # define a_ptable_clone_ud_init(U, T, O) \
186 (U).params = Perl_clone_params_new((O), aTHX)
187 # define a_ptable_clone_ud_deinit(U) Perl_clone_params_del((U).params)
188 # define a_dup_inc(S, U) SvREFCNT_inc(sv_dup((S), (U)->params))
190 # define a_ptable_clone_ud_init(U, T, O) \
192 (U).params.stashes = newAV(); \
193 (U).params.flags = 0; \
194 (U).params.proto_perl = (O)
195 # define a_ptable_clone_ud_deinit(U) SvREFCNT_dec((U).params.stashes)
196 # define a_dup_inc(S, U) SvREFCNT_inc(sv_dup((S), &((U)->params)))
199 STATIC void a_ptable_clone(pTHX_ ptable_ent *ent, void *ud_) {
200 a_ptable_clone_ud *ud = ud_;
201 a_hint_t *h1 = ent->val;
204 h2 = PerlMemShared_malloc(sizeof *h2);
206 h2->require_tag = PTR2IV(a_dup_inc(INT2PTR(SV *, h1->require_tag), ud));
208 ptable_hints_store(ud->tbl, ent->key, h2);
211 #endif /* A_WORKAROUND_REQUIRE_PROPAGATION */
213 STATIC void a_thread_cleanup(pTHX_ void *ud) {
216 #if A_WORKAROUND_REQUIRE_PROPAGATION
217 ptable_hints_free(MY_CXT.tbl);
218 #endif /* A_WORKAROUND_REQUIRE_PROPAGATION */
219 ptable_seen_free(MY_CXT.seen);
222 STATIC int a_endav_free(pTHX_ SV *sv, MAGIC *mg) {
223 SAVEDESTRUCTOR_X(a_thread_cleanup, NULL);
228 STATIC MGVTBL a_endav_vtbl = {
245 #endif /* A_THREADSAFE */
247 #if A_WORKAROUND_REQUIRE_PROPAGATION
249 STATIC IV a_require_tag(pTHX) {
250 #define a_require_tag() a_require_tag(aTHX)
251 const CV *cv, *outside;
256 /* If for some reason the pragma is operational at run-time, try to discover
257 * the current cv in use. */
260 for (si = PL_curstackinfo; si; si = si->si_prev) {
263 for (cxix = si->si_cxix; cxix >= 0; --cxix) {
264 const PERL_CONTEXT *cx = si->si_cxstack + cxix;
266 switch (CxTYPE(cx)) {
269 /* The propagation workaround is only needed up to 5.10.0 and at that
270 * time format and sub contexts were still identical. And even later the
271 * cv members offsets should have been kept the same. */
273 goto get_enclosing_cv;
275 cv = cx->blk_eval.cv;
276 goto get_enclosing_cv;
287 for (outside = CvOUTSIDE(cv); outside; outside = CvOUTSIDE(cv))
293 STATIC SV *a_tag(pTHX_ UV bits) {
294 #define a_tag(B) a_tag(aTHX_ (B))
297 h = PerlMemShared_malloc(sizeof *h);
299 h->require_tag = a_require_tag();
304 /* We only need for the key to be an unique tag for looking up the value later
305 * Allocated memory provides convenient unique identifiers, so that's why we
306 * use the hint as the key itself. */
307 ptable_hints_store(MY_CXT.tbl, h, h);
309 #endif /* A_THREADSAFE */
311 return newSViv(PTR2IV(h));
314 STATIC UV a_detag(pTHX_ const SV *hint) {
315 #define a_detag(H) a_detag(aTHX_ (H))
318 if (!(hint && SvIOK(hint)))
321 h = INT2PTR(a_hint_t *, SvIVX(hint));
325 h = ptable_fetch(MY_CXT.tbl, h);
327 #endif /* A_THREADSAFE */
329 if (a_require_tag() != h->require_tag)
335 #else /* A_WORKAROUND_REQUIRE_PROPAGATION */
337 #define a_tag(B) newSVuv(B)
338 /* PVs fetched from the hints chain have their SvLEN set to zero, so get the UV
345 ? sv_2uv(SvLEN(H) ? (H) : sv_mortalcopy(H)) \
351 #endif /* !A_WORKAROUND_REQUIRE_PROPAGATION */
353 /* Used both for hints and op flags */
354 #define A_HINT_STRICT 1
355 #define A_HINT_WARN 2
356 #define A_HINT_FETCH 4
357 #define A_HINT_STORE 8
358 #define A_HINT_EXISTS 16
359 #define A_HINT_DELETE 32
360 #define A_HINT_NOTIFY (A_HINT_STRICT|A_HINT_WARN)
361 #define A_HINT_DO (A_HINT_FETCH|A_HINT_STORE|A_HINT_EXISTS|A_HINT_DELETE)
362 #define A_HINT_MASK (A_HINT_NOTIFY|A_HINT_DO)
364 /* Only used in op flags */
365 #define A_HINT_ROOT 64
366 #define A_HINT_DEREF 128
368 STATIC U32 a_hash = 0;
370 STATIC UV a_hint(pTHX) {
371 #define a_hint() a_hint(aTHX)
373 #ifdef cop_hints_fetch_pvn
374 hint = cop_hints_fetch_pvn(PL_curcop, __PACKAGE__, __PACKAGE_LEN__, a_hash, 0);
375 #elif A_HAS_PERL(5, 9, 5)
376 hint = Perl_refcounted_he_fetch(aTHX_ PL_curcop->cop_hints_hash,
378 __PACKAGE__, __PACKAGE_LEN__,
382 SV **val = hv_fetch(GvHV(PL_hintgv), __PACKAGE__, __PACKAGE_LEN__, 0);
387 return a_detag(hint);
390 /* ... op => info map ...................................................... */
398 #define PTABLE_NAME ptable_map
399 #define PTABLE_VAL_FREE(V) PerlMemShared_free(V)
403 /* PerlMemShared_free() needs the [ap]PTBLMS_? default values */
404 #define ptable_map_store(T, K, V) ptable_map_store(aPTBLMS_ (T), (K), (V))
405 #define ptable_map_delete(T, K) ptable_map_delete(aPTBLMS_ (T), (K))
407 STATIC ptable *a_op_map = NULL;
411 #define dA_MAP_THX a_op_info a_op_map_tmp_oi
413 STATIC perl_mutex a_op_map_mutex;
415 #define A_LOCK(M) MUTEX_LOCK(M)
416 #define A_UNLOCK(M) MUTEX_UNLOCK(M)
418 STATIC const a_op_info *a_map_fetch(const OP *o, a_op_info *oi) {
419 const a_op_info *val;
421 A_LOCK(&a_op_map_mutex);
423 val = ptable_fetch(a_op_map, o);
429 A_UNLOCK(&a_op_map_mutex);
434 #define a_map_fetch(O) a_map_fetch((O), &a_op_map_tmp_oi)
436 #else /* USE_ITHREADS */
438 #define dA_MAP_THX dNOOP
440 #define A_LOCK(M) NOOP
441 #define A_UNLOCK(M) NOOP
443 #define a_map_fetch(O) ptable_fetch(a_op_map, (O))
445 #endif /* !USE_ITHREADS */
447 STATIC const a_op_info *a_map_store_locked(pPTBLMS_ const OP *o, OP *(*old_pp)(pTHX), void *next, UV flags) {
448 #define a_map_store_locked(O, PP, N, F) a_map_store_locked(aPTBLMS_ (O), (PP), (N), (F))
451 if (!(oi = ptable_fetch(a_op_map, o))) {
452 oi = PerlMemShared_malloc(sizeof *oi);
453 ptable_map_store(a_op_map, o, oi);
463 STATIC void a_map_store(pPTBLMS_ const OP *o, OP *(*old_pp)(pTHX), void *next, UV flags) {
464 #define a_map_store(O, PP, N, F) a_map_store(aPTBLMS_ (O), (PP), (N), (F))
465 A_LOCK(&a_op_map_mutex);
467 a_map_store_locked(o, old_pp, next, flags);
469 A_UNLOCK(&a_op_map_mutex);
472 STATIC void a_map_delete(pTHX_ const OP *o) {
473 #define a_map_delete(O) a_map_delete(aTHX_ (O))
474 A_LOCK(&a_op_map_mutex);
476 ptable_map_delete(a_op_map, o);
478 A_UNLOCK(&a_op_map_mutex);
481 STATIC const OP *a_map_descend(const OP *o) {
482 switch (PL_opargs[o->op_type] & OA_CLASS_MASK) {
486 case OA_BASEOP_OR_UNOP:
487 return cUNOPo->op_first;
490 return cLISTOPo->op_last;
496 STATIC void a_map_store_root(pPTBLMS_ const OP *root, OP *(*old_pp)(pTHX), UV flags) {
497 #define a_map_store_root(R, PP, F) a_map_store_root(aPTBLMS_ (R), (PP), (F))
498 const a_op_info *roi;
502 A_LOCK(&a_op_map_mutex);
504 roi = a_map_store_locked(o, old_pp, (OP *) root, flags | A_HINT_ROOT);
506 while (o->op_flags & OPf_KIDS) {
507 o = a_map_descend(o);
510 if ((oi = ptable_fetch(a_op_map, o))) {
511 oi->flags &= ~A_HINT_ROOT;
512 oi->next = (a_op_info *) roi;
517 A_UNLOCK(&a_op_map_mutex);
522 STATIC void a_map_update_flags_topdown(const OP *root, UV flags) {
526 A_LOCK(&a_op_map_mutex);
528 flags &= ~A_HINT_ROOT;
531 if ((oi = ptable_fetch(a_op_map, o)))
532 oi->flags = (oi->flags & A_HINT_ROOT) | flags;
533 if (!(o->op_flags & OPf_KIDS))
535 o = a_map_descend(o);
538 A_UNLOCK(&a_op_map_mutex);
543 #define a_map_cancel(R) a_map_update_flags_topdown((R), 0)
545 STATIC void a_map_update_flags_bottomup(const OP *o, UV flags, UV rflags) {
548 A_LOCK(&a_op_map_mutex);
550 flags &= ~A_HINT_ROOT;
551 rflags |= A_HINT_ROOT;
553 oi = ptable_fetch(a_op_map, o);
554 while (!(oi->flags & A_HINT_ROOT)) {
560 A_UNLOCK(&a_op_map_mutex);
565 /* ... Decide whether this expression should be autovivified or not ........ */
567 STATIC UV a_map_resolve(const OP *o, const a_op_info *oi) {
568 UV flags = 0, rflags;
570 const a_op_info *roi = oi;
572 while (!(roi->flags & A_HINT_ROOT))
577 rflags = roi->flags & ~A_HINT_ROOT;
582 if (root->op_flags & OPf_MOD) {
583 if (rflags & A_HINT_STORE)
584 flags = (A_HINT_STORE|A_HINT_DEREF);
585 } else if (rflags & A_HINT_FETCH)
586 flags = (A_HINT_FETCH|A_HINT_DEREF);
590 a_map_update_flags_bottomup(o, 0, 0);
594 flags |= (rflags & A_HINT_NOTIFY);
595 a_map_update_flags_bottomup(o, flags, 0);
597 return oi->flags & A_HINT_ROOT ? 0 : flags;
600 /* ... Inspired from pp_defined() .......................................... */
602 STATIC int a_undef(pTHX_ SV *sv) {
603 #define a_undef(S) a_undef(aTHX_ (S))
604 switch (SvTYPE(sv)) {
608 if (AvMAX(sv) >= 0 || SvGMAGICAL(sv)
609 || (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied)))
613 if (HvARRAY(sv) || SvGMAGICAL(sv)
614 || (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied)))
626 /* --- PP functions -------------------------------------------------------- */
628 /* Be aware that we restore PL_op->op_ppaddr from the pointer table old_pp
629 * value, another extension might have saved our pp replacement as the ppaddr
630 * for this op, so this doesn't ensure that our function will never be called
631 * again. That's why we don't remove the op info from our map, so that it can
632 * still run correctly if required. */
634 /* ... pp_rv2av ............................................................ */
636 STATIC OP *a_pp_rv2av(pTHX) {
641 oi = a_map_fetch(PL_op);
643 if (oi->flags & A_HINT_DEREF) {
645 /* We always need to push an empty array to fool the pp_aelem() that comes
649 av = sv_2mortal((SV *) newAV());
655 return oi->old_pp(aTHX);
658 /* ... pp_rv2hv ............................................................ */
660 STATIC OP *a_pp_rv2hv_simple(pTHX) {
665 oi = a_map_fetch(PL_op);
667 if (oi->flags & A_HINT_DEREF) {
672 return oi->old_pp(aTHX);
675 STATIC OP *a_pp_rv2hv(pTHX) {
680 oi = a_map_fetch(PL_op);
682 if (oi->flags & A_HINT_DEREF) {
686 hv = sv_2mortal((SV *) newHV());
692 return oi->old_pp(aTHX);
695 /* ... pp_deref (aelem,helem,rv2sv,padsv) .................................. */
697 STATIC OP *a_pp_deref(pTHX) {
703 oi = a_map_fetch(PL_op);
706 if (flags & A_HINT_DEREF) {
709 o = oi->old_pp(aTHX);
711 if (flags & (A_HINT_NOTIFY|A_HINT_STORE)) {
714 if (flags & A_HINT_STRICT)
715 croak("Reference vivification forbidden");
716 else if (flags & A_HINT_WARN)
717 warn("Reference was vivified");
718 else /* A_HINT_STORE */
719 croak("Can't vivify reference");
726 return oi->old_pp(aTHX);
729 /* ... pp_root (exists,delete,keys,values) ................................. */
731 STATIC OP *a_pp_root_unop(pTHX) {
736 /* Can only be reached by keys or values */
737 if (GIMME_V == G_SCALAR) {
746 const a_op_info *oi = a_map_fetch(PL_op);
747 return oi->old_pp(aTHX);
751 STATIC OP *a_pp_root_binop(pTHX) {
754 if (a_undef(TOPm1s)) {
757 if (PL_op->op_type == OP_EXISTS)
765 const a_op_info *oi = a_map_fetch(PL_op);
766 return oi->old_pp(aTHX);
770 /* --- Check functions ----------------------------------------------------- */
772 STATIC void a_recheck_rv2xv(pTHX_ OP *o, OPCODE type, OP *(*new_pp)(pTHX)) {
773 #define a_recheck_rv2xv(O, T, PP) a_recheck_rv2xv(aTHX_ (O), (T), (PP))
775 if (o->op_type == type && o->op_ppaddr != new_pp
776 && cUNOPo->op_first->op_type != OP_GV) {
778 const a_op_info *oi = a_map_fetch(o);
780 a_map_store(o, o->op_ppaddr, oi->next, oi->flags);
781 o->op_ppaddr = new_pp;
788 /* ... ck_pad{any,sv} ...................................................... */
790 /* Sadly, the padsv OPs we are interested in don't trigger the padsv check
791 * function, but are instead manually mutated from a padany. So we store
792 * the op entry in the op map in the padany check function, and we set their
793 * op_ppaddr member in our peephole optimizer replacement below. */
795 STATIC OP *(*a_old_ck_padany)(pTHX_ OP *) = 0;
797 STATIC OP *a_ck_padany(pTHX_ OP *o) {
800 o = a_old_ck_padany(aTHX_ o);
803 if (hint & A_HINT_DO)
804 a_map_store_root(o, o->op_ppaddr, hint);
811 STATIC OP *(*a_old_ck_padsv)(pTHX_ OP *) = 0;
813 STATIC OP *a_ck_padsv(pTHX_ OP *o) {
816 o = a_old_ck_padsv(aTHX_ o);
819 if (hint & A_HINT_DO) {
820 a_map_store_root(o, o->op_ppaddr, hint);
821 o->op_ppaddr = a_pp_deref;
828 /* ... ck_deref (aelem,helem,rv2sv) ........................................ */
830 /* Those ops appear both at the root and inside an expression but there's no
831 * way to distinguish both situations. Worse, we can't even know if we are in a
832 * modifying context, so the expression can't be resolved yet. It will be at the
833 * first invocation of a_pp_deref() for this expression. */
835 STATIC OP *(*a_old_ck_aelem)(pTHX_ OP *) = 0;
836 STATIC OP *(*a_old_ck_helem)(pTHX_ OP *) = 0;
837 STATIC OP *(*a_old_ck_rv2sv)(pTHX_ OP *) = 0;
839 STATIC OP *a_ck_deref(pTHX_ OP *o) {
840 OP * (*old_ck)(pTHX_ OP *o) = 0;
843 switch (o->op_type) {
845 old_ck = a_old_ck_aelem;
846 if ((hint & A_HINT_DO) && !(hint & A_HINT_STRICT))
847 a_recheck_rv2xv(cUNOPo->op_first, OP_RV2AV, a_pp_rv2av);
850 old_ck = a_old_ck_helem;
851 if ((hint & A_HINT_DO) && !(hint & A_HINT_STRICT))
852 a_recheck_rv2xv(cUNOPo->op_first, OP_RV2HV, a_pp_rv2hv_simple);
855 old_ck = a_old_ck_rv2sv;
860 if (hint & A_HINT_DO) {
861 a_map_store_root(o, o->op_ppaddr, hint);
862 o->op_ppaddr = a_pp_deref;
869 /* ... ck_rv2xv (rv2av,rv2hv) .............................................. */
871 /* Those ops also appear both inisde and at the root, hence the caveats for
872 * a_ck_deref() still apply here. Since a padsv/rv2sv must appear before a
873 * rv2[ah]v, resolution is handled by the first call to a_pp_deref() in the
876 STATIC OP *(*a_old_ck_rv2av)(pTHX_ OP *) = 0;
877 STATIC OP *(*a_old_ck_rv2hv)(pTHX_ OP *) = 0;
879 STATIC OP *a_ck_rv2xv(pTHX_ OP *o) {
880 OP * (*old_ck)(pTHX_ OP *o) = 0;
881 OP * (*new_pp)(pTHX) = 0;
884 switch (o->op_type) {
885 case OP_RV2AV: old_ck = a_old_ck_rv2av; new_pp = a_pp_rv2av; break;
886 case OP_RV2HV: old_ck = a_old_ck_rv2hv; new_pp = a_pp_rv2hv_simple; break;
890 if (cUNOPo->op_first->op_type == OP_GV)
894 if (hint & A_HINT_DO && !(hint & A_HINT_STRICT)) {
895 a_map_store_root(o, o->op_ppaddr, hint);
896 o->op_ppaddr = new_pp;
903 /* ... ck_xslice (aslice,hslice) ........................................... */
905 /* I think those are only found at the root, but there's nothing that really
906 * prevent them to be inside the expression too. We only need to update the
907 * root so that the rest of the expression will see the right context when
908 * resolving. That's why we don't replace the ppaddr. */
910 STATIC OP *(*a_old_ck_aslice)(pTHX_ OP *) = 0;
911 STATIC OP *(*a_old_ck_hslice)(pTHX_ OP *) = 0;
913 STATIC OP *a_ck_xslice(pTHX_ OP *o) {
914 OP * (*old_ck)(pTHX_ OP *o) = 0;
917 switch (o->op_type) {
919 old_ck = a_old_ck_aslice;
922 old_ck = a_old_ck_hslice;
923 if (hint & A_HINT_DO)
924 a_recheck_rv2xv(cUNOPo->op_first->op_sibling, OP_RV2HV, a_pp_rv2hv);
929 if (hint & A_HINT_DO) {
930 a_map_store_root(o, 0, hint);
937 /* ... ck_root (exists,delete,keys,values) ................................. */
939 /* Those ops are only found at the root of a dereferencing expression. We can
940 * then resolve at compile time if vivification must take place or not. */
942 STATIC OP *(*a_old_ck_exists)(pTHX_ OP *) = 0;
943 STATIC OP *(*a_old_ck_delete)(pTHX_ OP *) = 0;
944 STATIC OP *(*a_old_ck_keys) (pTHX_ OP *) = 0;
945 STATIC OP *(*a_old_ck_values)(pTHX_ OP *) = 0;
947 STATIC OP *a_ck_root(pTHX_ OP *o) {
948 OP * (*old_ck)(pTHX_ OP *o) = 0;
949 OP * (*new_pp)(pTHX) = 0;
950 bool enabled = FALSE;
953 switch (o->op_type) {
955 old_ck = a_old_ck_exists;
956 new_pp = a_pp_root_binop;
957 enabled = hint & A_HINT_EXISTS;
960 old_ck = a_old_ck_delete;
961 new_pp = a_pp_root_binop;
962 enabled = hint & A_HINT_DELETE;
965 old_ck = a_old_ck_keys;
966 new_pp = a_pp_root_unop;
967 enabled = hint & A_HINT_FETCH;
970 old_ck = a_old_ck_values;
971 new_pp = a_pp_root_unop;
972 enabled = hint & A_HINT_FETCH;
977 if (hint & A_HINT_DO) {
979 a_map_update_flags_topdown(o, hint | A_HINT_DEREF);
980 a_map_store_root(o, o->op_ppaddr, hint);
981 o->op_ppaddr = new_pp;
991 /* ... Our peephole optimizer .............................................. */
993 STATIC peep_t a_old_peep = 0; /* This is actually the rpeep past 5.13.5 */
995 STATIC void a_peep_rec(pTHX_ OP *o, ptable *seen);
997 STATIC void a_peep_rec(pTHX_ OP *o, ptable *seen) {
998 #define a_peep_rec(O) a_peep_rec(aTHX_ (O), seen)
999 for (; o; o = o->op_next) {
1001 const a_op_info *oi = NULL;
1005 if (ptable_fetch(seen, o))
1007 ptable_seen_store(seen, o, o);
1010 switch (o->op_type) {
1015 if (ptable_fetch(seen, o))
1017 ptable_seen_store(seen, o, o);
1021 if (o->op_ppaddr != a_pp_deref) {
1022 oi = a_map_fetch(o);
1023 if (oi && (oi->flags & A_HINT_DO)) {
1024 a_map_store(o, o->op_ppaddr, oi->next, oi->flags);
1025 o->op_ppaddr = a_pp_deref;
1033 if (o->op_ppaddr != a_pp_deref)
1035 oi = a_map_fetch(o);
1039 if (!(flags & A_HINT_DEREF)
1040 && (flags & A_HINT_DO)
1041 && (o->op_private & OPpDEREF || flags & A_HINT_ROOT)) {
1042 /* Decide if the expression must autovivify or not. */
1043 flags = a_map_resolve(o, oi);
1045 if (flags & A_HINT_DEREF)
1046 o->op_private = ((o->op_private & ~OPpDEREF) | OPpLVAL_DEFER);
1048 o->op_ppaddr = oi->old_pp;
1052 if ( o->op_ppaddr != a_pp_rv2av
1053 && o->op_ppaddr != a_pp_rv2hv
1054 && o->op_ppaddr != a_pp_rv2hv_simple)
1056 oi = a_map_fetch(o);
1059 if (!(oi->flags & A_HINT_DEREF))
1060 o->op_ppaddr = oi->old_pp;
1071 # if A_HAS_PERL(5, 10, 0)
1076 a_peep_rec(cLOGOPo->op_other);
1080 a_peep_rec(cLOOPo->op_redoop);
1081 a_peep_rec(cLOOPo->op_nextop);
1082 a_peep_rec(cLOOPo->op_lastop);
1084 # if A_HAS_PERL(5, 9, 5)
1086 a_peep_rec(cPMOPo->op_pmstashstartu.op_pmreplstart);
1092 a_peep_rec(cPMOPo->op_pmreplstart);
1095 #endif /* !A_HAS_RPEEP */
1102 STATIC void a_peep(pTHX_ OP *o) {
1104 ptable *seen = MY_CXT.seen;
1106 a_old_peep(aTHX_ o);
1108 ptable_seen_clear(seen);
1110 ptable_seen_clear(seen);
1113 /* --- Interpreter setup/teardown ------------------------------------------ */
1115 STATIC U32 a_initialized = 0;
1117 STATIC void a_teardown(pTHX_ void *root) {
1129 # if A_THREADSAFE && A_WORKAROUND_REQUIRE_PROPAGATION
1130 ptable_hints_free(MY_CXT.tbl);
1131 # endif /* A_THREADSAFE && A_WORKAROUND_REQUIRE_PROPAGATION */
1132 ptable_seen_free(MY_CXT.seen);
1135 a_ck_restore(OP_PADANY, &a_old_ck_padany);
1136 a_ck_restore(OP_PADSV, &a_old_ck_padsv);
1138 a_ck_restore(OP_AELEM, &a_old_ck_aelem);
1139 a_ck_restore(OP_HELEM, &a_old_ck_helem);
1140 a_ck_restore(OP_RV2SV, &a_old_ck_rv2sv);
1142 a_ck_restore(OP_RV2AV, &a_old_ck_rv2av);
1143 a_ck_restore(OP_RV2HV, &a_old_ck_rv2hv);
1145 a_ck_restore(OP_ASLICE, &a_old_ck_aslice);
1146 a_ck_restore(OP_HSLICE, &a_old_ck_hslice);
1148 a_ck_restore(OP_EXISTS, &a_old_ck_exists);
1149 a_ck_restore(OP_DELETE, &a_old_ck_delete);
1150 a_ck_restore(OP_KEYS, &a_old_ck_keys);
1151 a_ck_restore(OP_VALUES, &a_old_ck_values);
1154 PL_rpeepp = a_old_peep;
1156 PL_peepp = a_old_peep;
1163 STATIC void a_setup(pTHX) {
1164 #define a_setup() a_setup(aTHX)
1170 # if A_THREADSAFE && A_WORKAROUND_REQUIRE_PROPAGATION
1171 MY_CXT.tbl = ptable_new();
1172 MY_CXT.owner = aTHX;
1173 # endif /* A_THREADSAFE && A_WORKAROUND_REQUIRE_PROPAGATION */
1174 MY_CXT.seen = ptable_new();
1177 a_ck_replace(OP_PADANY, a_ck_padany, &a_old_ck_padany);
1178 a_ck_replace(OP_PADSV, a_ck_padsv, &a_old_ck_padsv);
1180 a_ck_replace(OP_AELEM, a_ck_deref, &a_old_ck_aelem);
1181 a_ck_replace(OP_HELEM, a_ck_deref, &a_old_ck_helem);
1182 a_ck_replace(OP_RV2SV, a_ck_deref, &a_old_ck_rv2sv);
1184 a_ck_replace(OP_RV2AV, a_ck_rv2xv, &a_old_ck_rv2av);
1185 a_ck_replace(OP_RV2HV, a_ck_rv2xv, &a_old_ck_rv2hv);
1187 a_ck_replace(OP_ASLICE, a_ck_xslice, &a_old_ck_aslice);
1188 a_ck_replace(OP_HSLICE, a_ck_xslice, &a_old_ck_hslice);
1190 a_ck_replace(OP_EXISTS, a_ck_root, &a_old_ck_exists);
1191 a_ck_replace(OP_DELETE, a_ck_root, &a_old_ck_delete);
1192 a_ck_replace(OP_KEYS, a_ck_root, &a_old_ck_keys);
1193 a_ck_replace(OP_VALUES, a_ck_root, &a_old_ck_values);
1196 a_old_peep = PL_rpeepp;
1199 a_old_peep = PL_peepp;
1204 call_atexit(a_teardown, aTHX);
1206 call_atexit(a_teardown, NULL);
1212 STATIC U32 a_booted = 0;
1214 /* --- XS ------------------------------------------------------------------ */
1216 MODULE = autovivification PACKAGE = autovivification
1225 a_op_map = ptable_new();
1227 MUTEX_INIT(&a_op_map_mutex);
1230 PERL_HASH(a_hash, __PACKAGE__, __PACKAGE_LEN__);
1232 stash = gv_stashpvn(__PACKAGE__, __PACKAGE_LEN__, 1);
1233 newCONSTSUB(stash, "A_HINT_STRICT", newSVuv(A_HINT_STRICT));
1234 newCONSTSUB(stash, "A_HINT_WARN", newSVuv(A_HINT_WARN));
1235 newCONSTSUB(stash, "A_HINT_FETCH", newSVuv(A_HINT_FETCH));
1236 newCONSTSUB(stash, "A_HINT_STORE", newSVuv(A_HINT_STORE));
1237 newCONSTSUB(stash, "A_HINT_EXISTS", newSVuv(A_HINT_EXISTS));
1238 newCONSTSUB(stash, "A_HINT_DELETE", newSVuv(A_HINT_DELETE));
1239 newCONSTSUB(stash, "A_HINT_MASK", newSVuv(A_HINT_MASK));
1240 newCONSTSUB(stash, "A_THREADSAFE", newSVuv(A_THREADSAFE));
1241 newCONSTSUB(stash, "A_FORKSAFE", newSVuv(A_FORKSAFE));
1253 #if A_WORKAROUND_REQUIRE_PROPAGATION
1261 #if A_WORKAROUND_REQUIRE_PROPAGATION
1263 a_ptable_clone_ud ud;
1266 a_ptable_clone_ud_init(ud, t, MY_CXT.owner);
1267 ptable_walk(MY_CXT.tbl, a_ptable_clone, &ud);
1268 a_ptable_clone_ud_deinit(ud);
1275 #if A_WORKAROUND_REQUIRE_PROPAGATION
1277 MY_CXT.owner = aTHX;
1281 gv = gv_fetchpv(__PACKAGE__ "::_THREAD_CLEANUP", 0, SVt_PVCV);
1287 if (!av_store(PL_endav, av_len(PL_endav) + 1, (SV *) cv))
1289 sv_magicext((SV *) PL_endav, NULL, PERL_MAGIC_ext, &a_endav_vtbl, NULL, 0);
1294 _THREAD_CLEANUP(...)
1297 a_thread_cleanup(aTHX_ NULL);
1300 #endif /* A_THREADSAFE */
1306 RETVAL = a_tag(SvOK(hint) ? SvUV(hint) : 0);
1316 RETVAL = newSVuv(a_detag(tag));