1 /* This file is part of the indirect Perl module.
2 * See http://search.cpan.org/dist/indirect/ */
4 #define PERL_NO_GET_CONTEXT
9 #define __PACKAGE__ "indirect"
10 #define __PACKAGE_LEN__ (sizeof(__PACKAGE__)-1)
12 /* --- Compatibility wrappers ---------------------------------------------- */
23 # define Newx(v, n, c) New(0, v, n, c)
27 # define SvPV_const SvPV
30 #ifndef SvPV_nolen_const
31 # define SvPV_nolen_const SvPV_nolen
35 # define SvPVX_const SvPVX
38 #ifndef SvREFCNT_inc_simple_NN
39 # define SvREFCNT_inc_simple_NN SvREFCNT_inc
42 #ifndef sv_catpvn_nomg
43 # define sv_catpvn_nomg sv_catpvn
47 # define mPUSHp(P, L) PUSHs(sv_2mortal(newSVpvn((P), (L))))
51 # define mPUSHu(U) PUSHs(sv_2mortal(newSVuv(U)))
55 # define HvNAME_get(H) HvNAME(H)
59 # define HvNAMELEN_get(H) strlen(HvNAME_get(H))
62 #define I_HAS_PERL(R, V, S) (PERL_REVISION > (R) || (PERL_REVISION == (R) && (PERL_VERSION > (V) || (PERL_VERSION == (V) && (PERL_SUBVERSION >= (S))))))
64 #if I_HAS_PERL(5, 10, 0) || defined(PL_parser)
65 # ifndef PL_lex_inwhat
66 # define PL_lex_inwhat PL_parser->lex_inwhat
69 # define PL_linestr PL_parser->linestr
72 # define PL_bufptr PL_parser->bufptr
75 # define PL_oldbufptr PL_parser->oldbufptr
78 # ifndef PL_lex_inwhat
79 # define PL_lex_inwhat PL_Ilex_inwhat
82 # define PL_linestr PL_Ilinestr
85 # define PL_bufptr PL_Ibufptr
88 # define PL_oldbufptr PL_Ioldbufptr
92 #ifndef I_WORKAROUND_REQUIRE_PROPAGATION
93 # define I_WORKAROUND_REQUIRE_PROPAGATION !I_HAS_PERL(5, 10, 1)
96 /* ... Thread safety and multiplicity ...................................... */
98 #ifndef I_MULTIPLICITY
99 # if defined(MULTIPLICITY) || defined(PERL_IMPLICIT_CONTEXT)
100 # define I_MULTIPLICITY 1
102 # define I_MULTIPLICITY 0
105 #if I_MULTIPLICITY && !defined(tTHX)
106 # define tTHX PerlInterpreter*
109 #if I_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))
110 # define I_THREADSAFE 1
111 # ifndef MY_CXT_CLONE
112 # define MY_CXT_CLONE \
114 my_cxt_t *my_cxtp = (my_cxt_t*)SvPVX(newSV(sizeof(my_cxt_t)-1)); \
115 Copy(INT2PTR(my_cxt_t*, SvUV(my_cxt_sv)), my_cxtp, 1, my_cxt_t); \
116 sv_setuv(my_cxt_sv, PTR2UV(my_cxtp))
119 # define I_THREADSAFE 0
121 # define dMY_CXT dNOOP
123 # define MY_CXT indirect_globaldata
125 # define START_MY_CXT STATIC my_cxt_t MY_CXT;
127 # define MY_CXT_INIT NOOP
129 # define MY_CXT_CLONE NOOP
132 /* --- Helpers ------------------------------------------------------------- */
134 /* ... Thread-safe hints ................................................... */
136 #if I_WORKAROUND_REQUIRE_PROPAGATION
143 #define I_HINT_STRUCT 1
145 #define I_HINT_CODE(H) ((H)->code)
147 #define I_HINT_FREE(H) { \
148 indirect_hint_t *h = (H); \
149 SvREFCNT_dec(h->code); \
150 PerlMemShared_free(h); \
153 #else /* I_WORKAROUND_REQUIRE_PROPAGATION */
155 typedef SV indirect_hint_t;
157 #define I_HINT_STRUCT 0
159 #define I_HINT_CODE(H) (H)
161 #define I_HINT_FREE(H) SvREFCNT_dec(H);
163 #endif /* !I_WORKAROUND_REQUIRE_PROPAGATION */
167 #define PTABLE_NAME ptable_hints
168 #define PTABLE_VAL_FREE(V) I_HINT_FREE(V)
177 #define ptable_hints_store(T, K, V) ptable_hints_store(aTHX_ (T), (K), (V))
178 #define ptable_hints_free(T) ptable_hints_free(aTHX_ (T))
180 #endif /* I_THREADSAFE */
182 /* Define the op->str ptable here because we need to be able to clean it during
190 } indirect_op_info_t;
192 #define PTABLE_NAME ptable
193 #define PTABLE_VAL_FREE(V) if (V) { Safefree(((indirect_op_info_t *) (V))->buf); Safefree(V); }
202 #define ptable_store(T, K, V) ptable_store(aTHX_ (T), (K), (V))
203 #define ptable_clear(T) ptable_clear(aTHX_ (T))
204 #define ptable_free(T) ptable_free(aTHX_ (T))
206 #define MY_CXT_KEY __PACKAGE__ "::_guts" XS_VERSION
210 ptable *tbl; /* It really is a ptable_hints */
221 STATIC SV *indirect_clone(pTHX_ SV *sv, tTHX owner) {
222 #define indirect_clone(S, O) indirect_clone(aTHX_ (S), (O))
227 if (SvTYPE(sv) == SVt_PVHV && HvNAME_get(sv))
230 param.stashes = stashes;
232 param.proto_perl = owner;
234 dupsv = sv_dup(sv, ¶m);
238 SvREFCNT_dec(stashes);
241 return SvREFCNT_inc(dupsv);
244 STATIC void indirect_ptable_clone(pTHX_ ptable_ent *ent, void *ud_) {
246 indirect_hint_t *h1 = ent->val;
249 if (ud->owner == aTHX)
254 h2 = PerlMemShared_malloc(sizeof *h2);
255 h2->code = indirect_clone(h1->code, ud->owner);
256 SvREFCNT_inc(h2->code);
257 #if I_WORKAROUND_REQUIRE_PROPAGATION
258 h2->requires = h1->requires;
261 #else /* I_HINT_STRUCT */
263 h2 = indirect_clone(h1, ud->owner);
266 #endif /* !I_HINT_STRUCT */
268 ptable_hints_store(ud->tbl, ent->key, h2);
271 STATIC void indirect_thread_cleanup(pTHX_ void *);
273 STATIC void indirect_thread_cleanup(pTHX_ void *ud) {
279 SAVEDESTRUCTOR_X(indirect_thread_cleanup, level);
283 PerlMemShared_free(level);
284 ptable_free(MY_CXT.map);
285 ptable_hints_free(MY_CXT.tbl);
289 #endif /* I_THREADSAFE */
291 STATIC SV *indirect_tag(pTHX_ SV *value) {
292 #define indirect_tag(V) indirect_tag(aTHX_ (V))
299 if (SvTYPE(value) >= SVt_PVCV) {
301 SvREFCNT_inc_simple_NN(code);
306 h = PerlMemShared_malloc(sizeof *h);
309 #if I_WORKAROUND_REQUIRE_PROPAGATION
314 for (si = PL_curstackinfo; si; si = si->si_prev) {
317 for (cxix = si->si_cxix; cxix >= 0; --cxix) {
318 const PERL_CONTEXT *cx = si->si_cxstack + cxix;
320 if (CxTYPE(cx) == CXt_EVAL && cx->blk_eval.old_op_type == OP_REQUIRE)
325 h->requires = requires;
327 #endif /* I_WORKAROUND_REQUIRE_PROPAGATION */
329 #else /* I_HINT_STRUCT */
331 #endif /* !I_HINT_STRUCT */
334 /* We only need for the key to be an unique tag for looking up the value later.
335 * Allocated memory provides convenient unique identifiers, so that's why we
336 * use the hint as the key itself. */
337 ptable_hints_store(MY_CXT.tbl, h, h);
338 #endif /* I_THREADSAFE */
340 return newSViv(PTR2IV(h));
343 STATIC SV *indirect_detag(pTHX_ const SV *hint) {
344 #define indirect_detag(H) indirect_detag(aTHX_ (H))
348 if (!(hint && SvIOK(hint)))
351 h = INT2PTR(indirect_hint_t *, SvIVX(hint));
353 h = ptable_fetch(MY_CXT.tbl, h);
354 #endif /* I_THREADSAFE */
356 #if I_WORKAROUND_REQUIRE_PROPAGATION
361 for (si = PL_curstackinfo; si; si = si->si_prev) {
364 for (cxix = si->si_cxix; cxix >= 0; --cxix) {
365 const PERL_CONTEXT *cx = si->si_cxstack + cxix;
367 if (CxTYPE(cx) == CXt_EVAL && cx->blk_eval.old_op_type == OP_REQUIRE
368 && ++requires > h->requires)
373 #endif /* I_WORKAROUND_REQUIRE_PROPAGATION */
375 return I_HINT_CODE(h);
378 STATIC U32 indirect_hash = 0;
380 STATIC SV *indirect_hint(pTHX) {
381 #define indirect_hint() indirect_hint(aTHX)
387 #if I_HAS_PERL(5, 9, 5)
388 hint = Perl_refcounted_he_fetch(aTHX_ PL_curcop->cop_hints_hash,
390 __PACKAGE__, __PACKAGE_LEN__,
395 SV **val = hv_fetch(GvHV(PL_hintgv), __PACKAGE__, __PACKAGE_LEN__,
402 return indirect_detag(hint);
405 /* ... op -> source position ............................................... */
407 STATIC void indirect_map_store(pTHX_ const OP *o, const char *src, SV *sv, line_t line) {
408 #define indirect_map_store(O, S, N, L) indirect_map_store(aTHX_ (O), (S), (N), (L))
409 indirect_op_info_t *oi;
414 /* When lex_inwhat is set, we're in a quotelike environment (qq, qr, but not q)
415 * In this case the linestr has temporarly changed, but the old buffer should
416 * still be alive somewhere. */
418 if (!PL_lex_inwhat) {
419 const char *pl_linestr = SvPVX_const(PL_linestr);
420 if (MY_CXT.linestr != pl_linestr) {
421 ptable_clear(MY_CXT.map);
422 MY_CXT.linestr = pl_linestr;
426 if (!(oi = ptable_fetch(MY_CXT.map, o))) {
427 Newx(oi, 1, indirect_op_info_t);
428 ptable_store(MY_CXT.map, o, oi);
434 s = SvPV_const(sv, len);
440 if (len > oi->size) {
442 Newx(oi->buf, len, char);
445 Copy(s, oi->buf, len, char);
452 STATIC const indirect_op_info_t *indirect_map_fetch(pTHX_ const OP *o) {
453 #define indirect_map_fetch(O) indirect_map_fetch(aTHX_ (O))
454 const indirect_op_info_t *val;
457 if (MY_CXT.linestr != SvPVX_const(PL_linestr))
460 return ptable_fetch(MY_CXT.map, o);
463 STATIC void indirect_map_delete(pTHX_ const OP *o) {
464 #define indirect_map_delete(O) indirect_map_delete(aTHX_ (O))
467 ptable_store(MY_CXT.map, o, NULL);
470 /* --- Check functions ----------------------------------------------------- */
472 STATIC const char *indirect_find(pTHX_ SV *sv, const char *s) {
473 #define indirect_find(N, S) indirect_find(aTHX_ (N), (S))
475 const char *p = NULL, *r = SvPV_const(sv, len);
477 if (len >= 1 && *r == '$') {
490 p = strstr(p + 1, r);
496 /* ... ck_const ............................................................ */
498 STATIC OP *(*indirect_old_ck_const)(pTHX_ OP *) = 0;
500 STATIC OP *indirect_ck_const(pTHX_ OP *o) {
501 o = CALL_FPTR(indirect_old_ck_const)(aTHX_ o);
503 if (indirect_hint()) {
505 if (SvPOK(sv) && (SvTYPE(sv) >= SVt_PV)) {
506 const char *s = indirect_find(sv, PL_oldbufptr);
507 indirect_map_store(o, s, sv, CopLINE(&PL_compiling));
512 indirect_map_delete(o);
516 /* ... ck_rv2sv ............................................................ */
518 STATIC OP *(*indirect_old_ck_rv2sv)(pTHX_ OP *) = 0;
520 STATIC OP *indirect_ck_rv2sv(pTHX_ OP *o) {
521 if (indirect_hint()) {
522 OP *op = cUNOPo->op_first;
524 const char *name = NULL, *s;
526 OPCODE type = (OPCODE) op->op_type;
531 GV *gv = cGVOPx_gv(op);
537 if ((PL_opargs[type] & OA_CLASS_MASK) == OA_SVOP) {
538 SV *nsv = cSVOPx_sv(op);
539 if (SvPOK(nsv) && (SvTYPE(nsv) >= SVt_PV))
540 name = SvPV_const(nsv, len);
546 sv = sv_2mortal(newSVpvn("$", 1));
547 sv_catpvn_nomg(sv, name, len);
548 s = indirect_find(sv, PL_oldbufptr);
549 if (!s) { /* If it failed, retry without the current stash */
550 const char *stash = HvNAME_get(PL_curstash);
551 STRLEN stashlen = HvNAMELEN_get(PL_curstash);
553 if ((len < stashlen + 2) || strnNE(name, stash, stashlen)
554 || name[stashlen] != ':' || name[stashlen+1] != ':') {
555 /* Failed again ? Try to remove main */
558 if ((len < stashlen + 2) || strnNE(name, stash, stashlen)
559 || name[stashlen] != ':' || name[stashlen+1] != ':')
563 sv_setpvn(sv, "$", 1);
565 sv_catpvn_nomg(sv, name + stashlen, len - stashlen);
566 s = indirect_find(sv, PL_oldbufptr);
571 o = CALL_FPTR(indirect_old_ck_rv2sv)(aTHX_ o);
572 indirect_map_store(o, s, sv, CopLINE(&PL_compiling));
577 o = CALL_FPTR(indirect_old_ck_rv2sv)(aTHX_ o);
579 indirect_map_delete(o);
583 /* ... ck_padany ........................................................... */
585 STATIC OP *(*indirect_old_ck_padany)(pTHX_ OP *) = 0;
587 STATIC OP *indirect_ck_padany(pTHX_ OP *o) {
588 o = CALL_FPTR(indirect_old_ck_padany)(aTHX_ o);
590 if (indirect_hint()) {
592 const char *s = PL_oldbufptr, *t = PL_bufptr - 1;
594 while (s < t && isSPACE(*s)) ++s;
595 if (*s == '$' && ++s <= t) {
596 while (s < t && isSPACE(*s)) ++s;
597 while (s < t && isSPACE(*t)) --t;
598 sv = sv_2mortal(newSVpvn("$", 1));
599 sv_catpvn_nomg(sv, s, t - s + 1);
600 indirect_map_store(o, s, sv, CopLINE(&PL_compiling));
605 indirect_map_delete(o);
609 /* ... ck_scope ............................................................ */
611 STATIC OP *(*indirect_old_ck_scope) (pTHX_ OP *) = 0;
612 STATIC OP *(*indirect_old_ck_lineseq)(pTHX_ OP *) = 0;
614 STATIC OP *indirect_ck_scope(pTHX_ OP *o) {
615 OP *(*old_ck)(pTHX_ OP *) = 0;
617 switch (o->op_type) {
618 case OP_SCOPE: old_ck = indirect_old_ck_scope; break;
619 case OP_LINESEQ: old_ck = indirect_old_ck_lineseq; break;
621 o = CALL_FPTR(old_ck)(aTHX_ o);
623 if (indirect_hint()) {
624 indirect_map_store(o, PL_oldbufptr, NULL, CopLINE(&PL_compiling));
628 indirect_map_delete(o);
632 /* We don't need to clean the map entries for leave ops because they can only
633 * be created by mutating from a lineseq. */
635 /* ... ck_method ........................................................... */
637 STATIC OP *(*indirect_old_ck_method)(pTHX_ OP *) = 0;
639 STATIC OP *indirect_ck_method(pTHX_ OP *o) {
640 if (indirect_hint()) {
641 OP *op = cUNOPo->op_first;
642 const indirect_op_info_t *oi = indirect_map_fetch(op);
643 const char *s = NULL;
647 if (oi && (s = oi->pos)) {
648 sv = sv_2mortal(newSVpvn(oi->buf, oi->len));
649 line = oi->line; /* Keep the old line so that we really point to the first */
652 if (!SvPOK(sv) || (SvTYPE(sv) < SVt_PV))
654 sv = sv_mortalcopy(sv);
655 s = indirect_find(sv, PL_oldbufptr);
656 line = CopLINE(&PL_compiling);
659 o = CALL_FPTR(indirect_old_ck_method)(aTHX_ o);
660 /* o may now be a method_named */
662 indirect_map_store(o, s, sv, line);
667 o = CALL_FPTR(indirect_old_ck_method)(aTHX_ o);
669 indirect_map_delete(o);
673 /* ... ck_entersub ......................................................... */
675 STATIC int indirect_is_indirect(const indirect_op_info_t *moi, const indirect_op_info_t *ooi) {
676 if (moi->pos > ooi->pos)
679 if (moi->pos == ooi->pos)
680 return moi->len == ooi->len && !memcmp(moi->buf, ooi->buf, moi->len);
685 STATIC OP *(*indirect_old_ck_entersub)(pTHX_ OP *) = 0;
687 STATIC OP *indirect_ck_entersub(pTHX_ OP *o) {
688 SV *code = indirect_hint();
690 o = CALL_FPTR(indirect_old_ck_entersub)(aTHX_ o);
693 const indirect_op_info_t *moi, *ooi;
699 lop = (LISTOP *) oop;
700 if (!(lop->op_flags & OPf_KIDS))
703 } while (oop->op_type != OP_PUSHMARK);
704 oop = oop->op_sibling;
710 switch (oop->op_type) {
721 if (mop->op_type == OP_METHOD)
722 mop = cUNOPx(mop)->op_first;
723 else if (mop->op_type != OP_METHOD_NAMED)
726 moi = indirect_map_fetch(mop);
727 if (!(moi && moi->pos))
730 ooi = indirect_map_fetch(oop);
731 if (!(ooi && ooi->pos))
734 if (indirect_is_indirect(moi, ooi)) {
742 file = sv_2mortal(newSVpv(CopFILE(&PL_compiling), 0));
744 file = sv_mortalcopy(CopFILESV(&PL_compiling));
749 mPUSHp(ooi->buf, ooi->len);
750 mPUSHp(moi->buf, moi->len);
755 call_sv(code, G_VOID);
768 STATIC U32 indirect_initialized = 0;
770 STATIC void indirect_teardown(pTHX_ void *root) {
771 #define indirect_teardown() indirect_teardown(aTHX)
774 if (!indirect_initialized)
782 ptable_free(MY_CXT.map);
784 ptable_hints_free(MY_CXT.tbl);
787 PL_check[OP_CONST] = MEMBER_TO_FPTR(indirect_old_ck_const);
788 indirect_old_ck_const = 0;
789 PL_check[OP_RV2SV] = MEMBER_TO_FPTR(indirect_old_ck_rv2sv);
790 indirect_old_ck_rv2sv = 0;
791 PL_check[OP_PADANY] = MEMBER_TO_FPTR(indirect_old_ck_padany);
792 indirect_old_ck_padany = 0;
793 PL_check[OP_SCOPE] = MEMBER_TO_FPTR(indirect_old_ck_scope);
794 indirect_old_ck_scope = 0;
795 PL_check[OP_LINESEQ] = MEMBER_TO_FPTR(indirect_old_ck_lineseq);
796 indirect_old_ck_lineseq = 0;
798 PL_check[OP_METHOD] = MEMBER_TO_FPTR(indirect_old_ck_method);
799 indirect_old_ck_method = 0;
800 PL_check[OP_ENTERSUB] = MEMBER_TO_FPTR(indirect_old_ck_entersub);
801 indirect_old_ck_entersub = 0;
803 indirect_initialized = 0;
806 STATIC void indirect_setup(pTHX) {
807 #define indirect_setup() indirect_setup(aTHX)
808 if (indirect_initialized)
813 MY_CXT.tbl = ptable_new();
816 MY_CXT.map = ptable_new();
817 MY_CXT.linestr = NULL;
819 indirect_old_ck_const = PL_check[OP_CONST];
820 PL_check[OP_CONST] = MEMBER_TO_FPTR(indirect_ck_const);
821 indirect_old_ck_rv2sv = PL_check[OP_RV2SV];
822 PL_check[OP_RV2SV] = MEMBER_TO_FPTR(indirect_ck_rv2sv);
823 indirect_old_ck_padany = PL_check[OP_PADANY];
824 PL_check[OP_PADANY] = MEMBER_TO_FPTR(indirect_ck_padany);
825 indirect_old_ck_scope = PL_check[OP_SCOPE];
826 PL_check[OP_SCOPE] = MEMBER_TO_FPTR(indirect_ck_scope);
827 indirect_old_ck_lineseq = PL_check[OP_LINESEQ];
828 PL_check[OP_LINESEQ] = MEMBER_TO_FPTR(indirect_ck_scope);
830 indirect_old_ck_method = PL_check[OP_METHOD];
831 PL_check[OP_METHOD] = MEMBER_TO_FPTR(indirect_ck_method);
832 indirect_old_ck_entersub = PL_check[OP_ENTERSUB];
833 PL_check[OP_ENTERSUB] = MEMBER_TO_FPTR(indirect_ck_entersub);
836 call_atexit(indirect_teardown, aTHX);
838 call_atexit(indirect_teardown, NULL);
841 indirect_initialized = 1;
844 STATIC U32 indirect_booted = 0;
846 /* --- XS ------------------------------------------------------------------ */
848 MODULE = indirect PACKAGE = indirect
854 if (!indirect_booted++) {
857 PERL_HASH(indirect_hash, __PACKAGE__, __PACKAGE_LEN__);
859 stash = gv_stashpvn(__PACKAGE__, __PACKAGE_LEN__, 1);
860 newCONSTSUB(stash, "I_THREADSAFE", newSVuv(I_THREADSAFE));
878 ud.tbl = t = ptable_new();
879 ud.owner = MY_CXT.owner;
880 ptable_walk(MY_CXT.tbl, indirect_ptable_clone, &ud);
884 MY_CXT.map = ptable_new();
885 MY_CXT.linestr = NULL;
890 level = PerlMemShared_malloc(sizeof *level);
893 SAVEDESTRUCTOR_X(indirect_thread_cleanup, level);
903 RETVAL = indirect_tag(value);