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 sv_catpvn_nomg
39 # define sv_catpvn_nomg sv_catpvn
43 # define mPUSHp(P, L) PUSHs(sv_2mortal(newSVpvn((P), (L))))
47 # define mPUSHu(U) PUSHs(sv_2mortal(newSVuv(U)))
51 # define HvNAME_get(H) HvNAME(H)
55 # define HvNAMELEN_get(H) strlen(HvNAME_get(H))
58 #define I_HAS_PERL(R, V, S) (PERL_REVISION > (R) || (PERL_REVISION == (R) && (PERL_VERSION > (V) || (PERL_VERSION == (V) && (PERL_SUBVERSION >= (S))))))
60 #if I_HAS_PERL(5, 10, 0) || defined(PL_parser)
61 # ifndef PL_lex_inwhat
62 # define PL_lex_inwhat PL_parser->lex_inwhat
65 # define PL_linestr PL_parser->linestr
68 # define PL_bufptr PL_parser->bufptr
71 # define PL_oldbufptr PL_parser->oldbufptr
74 # ifndef PL_lex_inwhat
75 # define PL_lex_inwhat PL_Ilex_inwhat
78 # define PL_linestr PL_Ilinestr
81 # define PL_bufptr PL_Ibufptr
84 # define PL_oldbufptr PL_Ioldbufptr
88 #ifndef I_WORKAROUND_REQUIRE_PROPAGATION
89 # define I_WORKAROUND_REQUIRE_PROPAGATION !I_HAS_PERL(5, 10, 1)
92 /* ... Thread safety and multiplicity ...................................... */
94 #ifndef I_MULTIPLICITY
95 # if defined(MULTIPLICITY) || defined(PERL_IMPLICIT_CONTEXT)
96 # define I_MULTIPLICITY 1
98 # define I_MULTIPLICITY 0
101 #if I_MULTIPLICITY && !defined(tTHX)
102 # define tTHX PerlInterpreter*
105 #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))
106 # define I_THREADSAFE 1
107 # ifndef MY_CXT_CLONE
108 # define MY_CXT_CLONE \
110 my_cxt_t *my_cxtp = (my_cxt_t*)SvPVX(newSV(sizeof(my_cxt_t)-1)); \
111 Copy(INT2PTR(my_cxt_t*, SvUV(my_cxt_sv)), my_cxtp, 1, my_cxt_t); \
112 sv_setuv(my_cxt_sv, PTR2UV(my_cxtp))
115 # define I_THREADSAFE 0
117 # define dMY_CXT dNOOP
119 # define MY_CXT indirect_globaldata
121 # define START_MY_CXT STATIC my_cxt_t MY_CXT;
123 # define MY_CXT_INIT NOOP
125 # define MY_CXT_CLONE NOOP
128 /* --- Helpers ------------------------------------------------------------- */
130 /* ... Thread-safe hints ................................................... */
132 /* If any of those are true, we need to store the hint in a global table. */
134 #if I_THREADSAFE || I_WORKAROUND_REQUIRE_PROPAGATION
138 #if I_WORKAROUND_REQUIRE_PROPAGATION
143 #define PTABLE_NAME ptable_hints
145 #define PTABLE_VAL_FREE(V) \
146 { indirect_hint_t *h = (V); SvREFCNT_dec(h->code); PerlMemShared_free(h); }
155 #define ptable_hints_store(T, K, V) ptable_hints_store(aTHX_ (T), (K), (V))
156 #define ptable_hints_free(T) ptable_hints_free(aTHX_ (T))
158 #endif /* I_THREADSAFE || I_WORKAROUND_REQUIRE_PROPAGATION */
160 /* Define the op->str ptable here because we need to be able to clean it during
168 } indirect_op_info_t;
170 #define PTABLE_NAME ptable
171 #define PTABLE_VAL_FREE(V) if (V) { Safefree(((indirect_op_info_t *) (V))->buf); Safefree(V); }
180 #define ptable_store(T, K, V) ptable_store(aTHX_ (T), (K), (V))
181 #define ptable_clear(T) ptable_clear(aTHX_ (T))
182 #define ptable_free(T) ptable_free(aTHX_ (T))
184 #define MY_CXT_KEY __PACKAGE__ "::_guts" XS_VERSION
187 #if I_THREADSAFE || I_WORKAROUND_REQUIRE_PROPAGATION
188 ptable *tbl; /* It really is a ptable_hints */
201 STATIC SV *indirect_clone(pTHX_ SV *sv, tTHX owner) {
202 #define indirect_clone(S, O) indirect_clone(aTHX_ (S), (O))
207 if (SvTYPE(sv) == SVt_PVHV && HvNAME_get(sv))
210 param.stashes = stashes;
212 param.proto_perl = owner;
214 dupsv = sv_dup(sv, ¶m);
218 SvREFCNT_dec(stashes);
221 return SvREFCNT_inc(dupsv);
224 STATIC void indirect_ptable_clone(pTHX_ ptable_ent *ent, void *ud_) {
226 indirect_hint_t *h1 = ent->val;
227 indirect_hint_t *h2 = PerlMemShared_malloc(sizeof *h2);
231 if (ud->owner != aTHX)
232 h2->code = indirect_clone(h1->code, ud->owner);
234 ptable_hints_store(ud->tbl, ent->key, h2);
235 SvREFCNT_inc(h2->code);
238 STATIC void indirect_thread_cleanup(pTHX_ void *);
240 STATIC void indirect_thread_cleanup(pTHX_ void *ud) {
246 SAVEDESTRUCTOR_X(indirect_thread_cleanup, level);
250 PerlMemShared_free(level);
251 ptable_free(MY_CXT.map);
252 ptable_hints_free(MY_CXT.tbl);
256 #endif /* I_THREADSAFE */
258 #if I_THREADSAFE || I_WORKAROUND_REQUIRE_PROPAGATION
260 STATIC SV *indirect_tag(pTHX_ SV *value) {
261 #define indirect_tag(V) indirect_tag(aTHX_ (V))
265 value = SvOK(value) && SvROK(value) ? SvRV(value) : NULL;
267 h = PerlMemShared_malloc(sizeof *h);
268 h->code = SvREFCNT_inc(value);
270 #if I_WORKAROUND_REQUIRE_PROPAGATION
275 for (si = PL_curstackinfo; si; si = si->si_prev) {
278 for (cxix = si->si_cxix; cxix >= 0; --cxix) {
279 const PERL_CONTEXT *cx = si->si_cxstack + cxix;
281 if (CxTYPE(cx) == CXt_EVAL && cx->blk_eval.old_op_type == OP_REQUIRE)
286 h->requires = requires;
290 /* We only need for the key to be an unique tag for looking up the value later.
291 * Allocated memory provides convenient unique identifiers, so that's why we
292 * use the value pointer as the key itself. */
293 ptable_hints_store(MY_CXT.tbl, value, h);
295 return newSVuv(PTR2UV(value));
298 STATIC SV *indirect_detag(pTHX_ const SV *hint) {
299 #define indirect_detag(H) indirect_detag(aTHX_ (H))
303 if (!(hint && SvOK(hint) && SvIOK(hint)))
306 h = ptable_fetch(MY_CXT.tbl, INT2PTR(void *, SvUVX(hint)));
308 #if I_WORKAROUND_REQUIRE_PROPAGATION
313 for (si = PL_curstackinfo; si; si = si->si_prev) {
316 for (cxix = si->si_cxix; cxix >= 0; --cxix) {
317 const PERL_CONTEXT *cx = si->si_cxstack + cxix;
319 if (CxTYPE(cx) == CXt_EVAL && cx->blk_eval.old_op_type == OP_REQUIRE
320 && ++requires > h->requires)
332 STATIC SV *indirect_tag(pTHX_ SV *value) {
333 #define indirect_tag(V) indirect_tag(aTHX_ (V))
336 if (SvOK(value) && SvROK(value)) {
345 #define indirect_detag(H) (((H) && SvOK(H)) ? INT2PTR(SV *, SvUVX(H)) : NULL)
347 #endif /* I_THREADSAFE || I_WORKAROUND_REQUIRE_PROPAGATION */
349 STATIC U32 indirect_hash = 0;
351 STATIC SV *indirect_hint(pTHX) {
352 #define indirect_hint() indirect_hint(aTHX)
354 #if I_HAS_PERL(5, 9, 5)
355 hint = Perl_refcounted_he_fetch(aTHX_ PL_curcop->cop_hints_hash,
357 __PACKAGE__, __PACKAGE_LEN__,
361 SV **val = hv_fetch(GvHV(PL_hintgv), __PACKAGE__, __PACKAGE_LEN__,
367 return indirect_detag(hint);
370 /* ... op -> source position ............................................... */
372 STATIC void indirect_map_store(pTHX_ const OP *o, const char *src, SV *sv, line_t line) {
373 #define indirect_map_store(O, S, N, L) indirect_map_store(aTHX_ (O), (S), (N), (L))
374 indirect_op_info_t *oi;
379 /* When lex_inwhat is set, we're in a quotelike environment (qq, qr, but not q)
380 * In this case the linestr has temporarly changed, but the old buffer should
381 * still be alive somewhere. */
383 if (!PL_lex_inwhat) {
384 const char *pl_linestr = SvPVX_const(PL_linestr);
385 if (MY_CXT.linestr != pl_linestr) {
386 ptable_clear(MY_CXT.map);
387 MY_CXT.linestr = pl_linestr;
391 if (!(oi = ptable_fetch(MY_CXT.map, o))) {
392 Newx(oi, 1, indirect_op_info_t);
393 ptable_store(MY_CXT.map, o, oi);
398 s = SvPV_const(sv, len);
399 if (len > oi->size) {
401 Newx(oi->buf, len, char);
404 Copy(s, oi->buf, len, char);
410 STATIC const indirect_op_info_t *indirect_map_fetch(pTHX_ const OP *o) {
411 #define indirect_map_fetch(O) indirect_map_fetch(aTHX_ (O))
412 const indirect_op_info_t *val;
415 if (MY_CXT.linestr != SvPVX_const(PL_linestr))
418 return ptable_fetch(MY_CXT.map, o);
421 STATIC void indirect_map_delete(pTHX_ const OP *o) {
422 #define indirect_map_delete(O) indirect_map_delete(aTHX_ (O))
425 ptable_store(MY_CXT.map, o, NULL);
428 /* --- Check functions ----------------------------------------------------- */
430 STATIC const char *indirect_find(pTHX_ SV *sv, const char *s) {
431 #define indirect_find(N, S) indirect_find(aTHX_ (N), (S))
433 const char *p = NULL, *r = SvPV_const(sv, len);
435 if (len >= 1 && *r == '$') {
448 p = strstr(p + 1, r);
454 /* ... ck_const ............................................................ */
456 STATIC OP *(*indirect_old_ck_const)(pTHX_ OP *) = 0;
458 STATIC OP *indirect_ck_const(pTHX_ OP *o) {
459 o = CALL_FPTR(indirect_old_ck_const)(aTHX_ o);
461 if (indirect_hint()) {
463 if (SvPOK(sv) && (SvTYPE(sv) >= SVt_PV)) {
464 const char *s = indirect_find(sv, PL_oldbufptr);
465 indirect_map_store(o, s, sv, CopLINE(&PL_compiling));
470 indirect_map_delete(o);
474 /* ... ck_rv2sv ............................................................ */
476 STATIC OP *(*indirect_old_ck_rv2sv)(pTHX_ OP *) = 0;
478 STATIC OP *indirect_ck_rv2sv(pTHX_ OP *o) {
479 if (indirect_hint()) {
480 OP *op = cUNOPo->op_first;
482 const char *name = NULL, *s;
484 OPCODE type = (OPCODE) op->op_type;
489 GV *gv = cGVOPx_gv(op);
495 if ((PL_opargs[type] & OA_CLASS_MASK) == OA_SVOP) {
496 SV *nsv = cSVOPx_sv(op);
497 if (SvPOK(nsv) && (SvTYPE(nsv) >= SVt_PV))
498 name = SvPV_const(nsv, len);
504 sv = sv_2mortal(newSVpvn("$", 1));
505 sv_catpvn_nomg(sv, name, len);
506 s = indirect_find(sv, PL_oldbufptr);
507 if (!s) { /* If it failed, retry without the current stash */
508 const char *stash = HvNAME_get(PL_curstash);
509 STRLEN stashlen = HvNAMELEN_get(PL_curstash);
511 if ((len < stashlen + 2) || strnNE(name, stash, stashlen)
512 || name[stashlen] != ':' || name[stashlen+1] != ':') {
513 /* Failed again ? Try to remove main */
516 if ((len < stashlen + 2) || strnNE(name, stash, stashlen)
517 || name[stashlen] != ':' || name[stashlen+1] != ':')
521 sv_setpvn(sv, "$", 1);
523 sv_catpvn_nomg(sv, name + stashlen, len - stashlen);
524 s = indirect_find(sv, PL_oldbufptr);
529 o = CALL_FPTR(indirect_old_ck_rv2sv)(aTHX_ o);
530 indirect_map_store(o, s, sv, CopLINE(&PL_compiling));
535 o = CALL_FPTR(indirect_old_ck_rv2sv)(aTHX_ o);
537 indirect_map_delete(o);
541 /* ... ck_padany ........................................................... */
543 STATIC OP *(*indirect_old_ck_padany)(pTHX_ OP *) = 0;
545 STATIC OP *indirect_ck_padany(pTHX_ OP *o) {
546 o = CALL_FPTR(indirect_old_ck_padany)(aTHX_ o);
548 if (indirect_hint()) {
550 const char *s = PL_oldbufptr, *t = PL_bufptr - 1;
552 while (s < t && isSPACE(*s)) ++s;
553 if (*s == '$' && ++s <= t) {
554 while (s < t && isSPACE(*s)) ++s;
555 while (s < t && isSPACE(*t)) --t;
556 sv = sv_2mortal(newSVpvn("$", 1));
557 sv_catpvn_nomg(sv, s, t - s + 1);
558 indirect_map_store(o, s, sv, CopLINE(&PL_compiling));
563 indirect_map_delete(o);
567 /* ... ck_method ........................................................... */
569 STATIC OP *(*indirect_old_ck_method)(pTHX_ OP *) = 0;
571 STATIC OP *indirect_ck_method(pTHX_ OP *o) {
572 if (indirect_hint()) {
573 OP *op = cUNOPo->op_first;
574 const indirect_op_info_t *oi = indirect_map_fetch(op);
575 const char *s = NULL;
579 if (oi && (s = oi->pos)) {
580 sv = sv_2mortal(newSVpvn(oi->buf, oi->len));
581 line = oi->line; /* Keep the old line so that we really point to the first */
584 if (!SvPOK(sv) || (SvTYPE(sv) < SVt_PV))
586 sv = sv_mortalcopy(sv);
587 s = indirect_find(sv, PL_oldbufptr);
588 line = CopLINE(&PL_compiling);
591 o = CALL_FPTR(indirect_old_ck_method)(aTHX_ o);
592 /* o may now be a method_named */
594 indirect_map_store(o, s, sv, line);
599 o = CALL_FPTR(indirect_old_ck_method)(aTHX_ o);
601 indirect_map_delete(o);
605 /* ... ck_entersub ......................................................... */
607 STATIC OP *(*indirect_old_ck_entersub)(pTHX_ OP *) = 0;
609 STATIC OP *indirect_ck_entersub(pTHX_ OP *o) {
610 SV *code = indirect_hint();
612 o = CALL_FPTR(indirect_old_ck_entersub)(aTHX_ o);
615 const indirect_op_info_t *moi, *ooi;
621 lop = (LISTOP *) oop;
622 if (!(lop->op_flags & OPf_KIDS))
625 } while (oop->op_type != OP_PUSHMARK);
626 oop = oop->op_sibling;
632 switch (oop->op_type) {
641 if (mop->op_type == OP_METHOD)
642 mop = cUNOPx(mop)->op_first;
643 else if (mop->op_type != OP_METHOD_NAMED)
646 moi = indirect_map_fetch(mop);
647 if (!(moi && moi->pos))
650 ooi = indirect_map_fetch(oop);
651 if (!(ooi && ooi->pos))
654 if (moi->pos < ooi->pos) {
662 file = sv_2mortal(newSVpv(CopFILE(&PL_compiling), 0));
664 file = sv_mortalcopy(CopFILESV(&PL_compiling));
669 mPUSHp(ooi->buf, ooi->len);
670 mPUSHp(moi->buf, moi->len);
675 call_sv(code, G_VOID);
688 STATIC U32 indirect_initialized = 0;
690 /* --- XS ------------------------------------------------------------------ */
692 MODULE = indirect PACKAGE = indirect
698 if (!indirect_initialized++) {
702 MY_CXT.map = ptable_new();
703 MY_CXT.linestr = NULL;
704 #if I_THREADSAFE || I_WORKAROUND_REQUIRE_PROPAGATION
705 MY_CXT.tbl = ptable_new();
711 PERL_HASH(indirect_hash, __PACKAGE__, __PACKAGE_LEN__);
713 indirect_old_ck_const = PL_check[OP_CONST];
714 PL_check[OP_CONST] = MEMBER_TO_FPTR(indirect_ck_const);
715 indirect_old_ck_rv2sv = PL_check[OP_RV2SV];
716 PL_check[OP_RV2SV] = MEMBER_TO_FPTR(indirect_ck_rv2sv);
717 indirect_old_ck_padany = PL_check[OP_PADANY];
718 PL_check[OP_PADANY] = MEMBER_TO_FPTR(indirect_ck_padany);
719 indirect_old_ck_method = PL_check[OP_METHOD];
720 PL_check[OP_METHOD] = MEMBER_TO_FPTR(indirect_ck_method);
721 indirect_old_ck_entersub = PL_check[OP_ENTERSUB];
722 PL_check[OP_ENTERSUB] = MEMBER_TO_FPTR(indirect_ck_entersub);
724 stash = gv_stashpvn(__PACKAGE__, __PACKAGE_LEN__, 1);
725 newCONSTSUB(stash, "I_THREADSAFE", newSVuv(I_THREADSAFE));
741 ud.tbl = t = ptable_new();
742 ud.owner = MY_CXT.owner;
743 ptable_walk(MY_CXT.tbl, indirect_ptable_clone, &ud);
747 MY_CXT.map = ptable_new();
748 MY_CXT.linestr = NULL;
753 level = PerlMemShared_malloc(sizeof *level);
756 SAVEDESTRUCTOR_X(indirect_thread_cleanup, level);
766 RETVAL = indirect_tag(value);