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 SvPV_const SvPV
26 #ifndef SvPV_nolen_const
27 # define SvPV_nolen_const SvPV_nolen
31 # define SvPVX_const SvPVX
34 #ifndef sv_catpvn_nomg
35 # define sv_catpvn_nomg sv_catpvn
39 # define mPUSHu(U) PUSHs(sv_2mortal(newSVuv(U)))
43 # define HvNAME_get(H) HvNAME(H)
47 # define HvNAMELEN_get(H) strlen(HvNAME_get(H))
50 #define I_HAS_PERL(R, V, S) (PERL_REVISION > (R) || (PERL_REVISION == (R) && (PERL_VERSION > (V) || (PERL_VERSION == (V) && (PERL_SUBVERSION >= (S))))))
52 #if I_HAS_PERL(5, 10, 0) || defined(PL_parser)
53 # ifndef PL_lex_inwhat
54 # define PL_lex_inwhat PL_parser->lex_inwhat
57 # define PL_linestr PL_parser->linestr
60 # define PL_bufptr PL_parser->bufptr
63 # define PL_oldbufptr PL_parser->oldbufptr
66 # ifndef PL_lex_inwhat
67 # define PL_lex_inwhat PL_Ilex_inwhat
70 # define PL_linestr PL_Ilinestr
73 # define PL_bufptr PL_Ibufptr
76 # define PL_oldbufptr PL_Ioldbufptr
80 #ifndef I_WORKAROUND_REQUIRE_PROPAGATION
81 # define I_WORKAROUND_REQUIRE_PROPAGATION !I_HAS_PERL(5, 10, 1)
84 /* ... Thread safety and multiplicity ...................................... */
86 #ifndef I_MULTIPLICITY
87 # if defined(MULTIPLICITY) || defined(PERL_IMPLICIT_CONTEXT)
88 # define I_MULTIPLICITY 1
90 # define I_MULTIPLICITY 0
93 #if I_MULTIPLICITY && !defined(tTHX)
94 # define tTHX PerlInterpreter*
97 #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))
98 # define I_THREADSAFE 1
100 # define MY_CXT_CLONE \
102 my_cxt_t *my_cxtp = (my_cxt_t*)SvPVX(newSV(sizeof(my_cxt_t)-1)); \
103 Copy(INT2PTR(my_cxt_t*, SvUV(my_cxt_sv)), my_cxtp, 1, my_cxt_t); \
104 sv_setuv(my_cxt_sv, PTR2UV(my_cxtp))
107 # define I_THREADSAFE 0
109 # define dMY_CXT dNOOP
111 # define MY_CXT indirect_globaldata
113 # define START_MY_CXT STATIC my_cxt_t MY_CXT;
115 # define MY_CXT_INIT NOOP
117 # define MY_CXT_CLONE NOOP
120 /* --- Helpers ------------------------------------------------------------- */
122 /* ... Thread-safe hints ................................................... */
124 /* If any of those are true, we need to store the hint in a global table. */
126 #if I_THREADSAFE || I_WORKAROUND_REQUIRE_PROPAGATION
130 #if I_WORKAROUND_REQUIRE_PROPAGATION
135 #define PTABLE_NAME ptable_hints
137 #if I_WORKAROUND_REQUIRE_PROPAGATION
138 # define PTABLE_VAL_FREE(V) \
139 { indirect_hint_t *h = (V); SvREFCNT_dec(h->code); PerlMemShared_free(h); }
141 # define PTABLE_VAL_FREE(V) SvREFCNT_dec(V)
151 #define ptable_hints_store(T, K, V) ptable_hints_store(aTHX_ (T), (K), (V))
152 #define ptable_hints_free(T) ptable_hints_free(aTHX_ (T))
154 #endif /* I_THREADSAFE || I_WORKAROUND_REQUIRE_PROPAGATION */
156 /* Define the op->str ptable here because we need to be able to clean it during
159 #define PTABLE_NAME ptable
160 #define PTABLE_VAL_FREE(V) SvREFCNT_dec(V)
169 #define ptable_store(T, K, V) ptable_store(aTHX_ (T), (K), (V))
170 #define ptable_clear(T) ptable_clear(aTHX_ (T))
171 #define ptable_free(T) ptable_free(aTHX_ (T))
173 #define MY_CXT_KEY __PACKAGE__ "::_guts" XS_VERSION
176 #if I_THREADSAFE || I_WORKAROUND_REQUIRE_PROPAGATION
177 ptable *tbl; /* It really is a ptable_hints */
190 STATIC void indirect_ptable_clone(pTHX_ ptable_ent *ent, void *ud_) {
192 indirect_hint_t *h1 = ent->val;
193 indirect_hint_t *h2 = PerlMemShared_malloc(sizeof *h2);
197 if (ud->owner != aTHX) {
200 AV *stashes = (SvTYPE(val) == SVt_PVHV && HvNAME_get(val)) ? newAV() : NULL;
201 param.stashes = stashes;
203 param.proto_perl = ud->owner;
204 h2->code = sv_dup(val, ¶m);
207 SvREFCNT_dec(stashes);
211 ptable_hints_store(ud->tbl, ent->key, h2);
212 SvREFCNT_inc(h2->code);
215 STATIC void indirect_thread_cleanup(pTHX_ void *);
217 STATIC void indirect_thread_cleanup(pTHX_ void *ud) {
223 SAVEDESTRUCTOR_X(indirect_thread_cleanup, level);
227 PerlMemShared_free(level);
228 ptable_free(MY_CXT.map);
229 ptable_hints_free(MY_CXT.tbl);
233 #endif /* I_THREADSAFE */
235 #if I_THREADSAFE || I_WORKAROUND_REQUIRE_PROPAGATION
237 STATIC SV *indirect_tag(pTHX_ SV *value) {
238 #define indirect_tag(V) indirect_tag(aTHX_ (V))
242 value = SvOK(value) && SvROK(value) ? SvRV(value) : NULL;
244 h = PerlMemShared_malloc(sizeof *h);
245 h->code = SvREFCNT_inc(value);
247 #if I_WORKAROUND_REQUIRE_PROPAGATION
252 for (si = PL_curstackinfo; si; si = si->si_prev) {
255 for (cxix = si->si_cxix; cxix >= 0; --cxix) {
256 const PERL_CONTEXT *cx = si->si_cxstack + cxix;
258 if (CxTYPE(cx) == CXt_EVAL && cx->blk_eval.old_op_type == OP_REQUIRE)
263 h->requires = requires;
267 /* We only need for the key to be an unique tag for looking up the value later.
268 * Allocated memory provides convenient unique identifiers, so that's why we
269 * use the value pointer as the key itself. */
270 ptable_hints_store(MY_CXT.tbl, value, h);
272 return newSVuv(PTR2UV(value));
275 STATIC SV *indirect_detag(pTHX_ const SV *hint) {
276 #define indirect_detag(H) indirect_detag(aTHX_ (H))
280 if (!(hint && SvOK(hint) && SvIOK(hint)))
283 h = ptable_fetch(MY_CXT.tbl, INT2PTR(void *, SvUVX(hint)));
285 #if I_WORKAROUND_REQUIRE_PROPAGATION
290 for (si = PL_curstackinfo; si; si = si->si_prev) {
293 for (cxix = si->si_cxix; cxix >= 0; --cxix) {
294 const PERL_CONTEXT *cx = si->si_cxstack + cxix;
296 if (CxTYPE(cx) == CXt_EVAL && cx->blk_eval.old_op_type == OP_REQUIRE
297 && ++requires > h->requires)
309 STATIC SV *indirect_tag(pTHX_ SV *value) {
310 #define indirect_tag(V) indirect_tag(aTHX_ (V))
313 if (SvOK(value) && SvROK(value)) {
322 #define indirect_detag(H) (((H) && SvOK(H)) ? INT2PTR(SV *, SvUVX(H)) : NULL)
324 #endif /* I_THREADSAFE || I_WORKAROUND_REQUIRE_PROPAGATION */
326 STATIC U32 indirect_hash = 0;
328 STATIC SV *indirect_hint(pTHX) {
329 #define indirect_hint() indirect_hint(aTHX)
331 #if I_HAS_PERL(5, 9, 5)
332 hint = Perl_refcounted_he_fetch(aTHX_ PL_curcop->cop_hints_hash,
334 __PACKAGE__, __PACKAGE_LEN__,
338 SV **val = hv_fetch(GvHV(PL_hintgv), __PACKAGE__, __PACKAGE_LEN__,
344 return indirect_detag(hint);
347 /* ... op -> source position ............................................... */
349 STATIC void indirect_map_store(pTHX_ const OP *o, const char *src, SV *sv) {
350 #define indirect_map_store(O, S, N) indirect_map_store(aTHX_ (O), (S), (N))
354 /* When lex_inwhat is set, we're in a quotelike environment (qq, qr, but not q)
355 * In this case the linestr has temporarly changed, but the old buffer should
356 * still be alive somewhere. */
358 if (!PL_lex_inwhat) {
359 const char *pl_linestr = SvPVX_const(PL_linestr);
360 if (MY_CXT.linestr != pl_linestr) {
361 ptable_clear(MY_CXT.map);
362 MY_CXT.linestr = pl_linestr;
367 SvUPGRADE(val, SVt_PVIV);
368 SvUVX(val) = PTR2UV(src);
373 ptable_store(MY_CXT.map, o, val);
376 STATIC const char *indirect_map_fetch(pTHX_ const OP *o, SV ** const name) {
377 #define indirect_map_fetch(O, S) indirect_map_fetch(aTHX_ (O), (S))
381 if (MY_CXT.linestr != SvPVX_const(PL_linestr))
384 val = ptable_fetch(MY_CXT.map, o);
391 return INT2PTR(const char *, SvUVX(val));
394 /* --- Check functions ----------------------------------------------------- */
396 STATIC const char *indirect_find(pTHX_ SV *sv, const char *s) {
397 #define indirect_find(N, S) indirect_find(aTHX_ (N), (S))
399 const char *p = NULL, *r = SvPV_const(sv, len);
401 if (len >= 1 && *r == '$') {
414 p = strstr(p + 1, r);
420 /* ... ck_const ............................................................ */
422 STATIC OP *(*indirect_old_ck_const)(pTHX_ OP *) = 0;
424 STATIC OP *indirect_ck_const(pTHX_ OP *o) {
425 o = CALL_FPTR(indirect_old_ck_const)(aTHX_ o);
427 if (indirect_hint()) {
429 if (SvPOK(sv) && (SvTYPE(sv) >= SVt_PV))
430 indirect_map_store(o, indirect_find(sv, PL_oldbufptr), sv);
436 /* ... ck_rv2sv ............................................................ */
438 STATIC OP *(*indirect_old_ck_rv2sv)(pTHX_ OP *) = 0;
440 STATIC OP *indirect_ck_rv2sv(pTHX_ OP *o) {
441 if (indirect_hint()) {
442 OP *op = cUNOPo->op_first;
444 const char *name = NULL, *s;
446 OPCODE type = (OPCODE) op->op_type;
451 GV *gv = cGVOPx_gv(op);
457 if ((PL_opargs[type] & OA_CLASS_MASK) == OA_SVOP) {
458 SV *nsv = cSVOPx_sv(op);
459 if (SvPOK(nsv) && (SvTYPE(nsv) >= SVt_PV))
460 name = SvPV_const(nsv, len);
466 sv = sv_2mortal(newSVpvn("$", 1));
467 sv_catpvn_nomg(sv, name, len);
468 s = indirect_find(sv, PL_oldbufptr);
469 if (!s) { /* If it failed, retry without the current stash */
470 const char *stash = HvNAME_get(PL_curstash);
471 STRLEN stashlen = HvNAMELEN_get(PL_curstash);
473 if ((len < stashlen + 2) || strnNE(name, stash, stashlen)
474 || name[stashlen] != ':' || name[stashlen+1] != ':') {
475 /* Failed again ? Try to remove main */
478 if ((len < stashlen + 2) || strnNE(name, stash, stashlen)
479 || name[stashlen] != ':' || name[stashlen+1] != ':')
483 sv_setpvn(sv, "$", 1);
485 sv_catpvn_nomg(sv, name + stashlen, len - stashlen);
486 s = indirect_find(sv, PL_oldbufptr);
491 o = CALL_FPTR(indirect_old_ck_rv2sv)(aTHX_ o);
492 indirect_map_store(o, s, sv);
497 return CALL_FPTR(indirect_old_ck_rv2sv)(aTHX_ o);
500 /* ... ck_padany ........................................................... */
502 STATIC OP *(*indirect_old_ck_padany)(pTHX_ OP *) = 0;
504 STATIC OP *indirect_ck_padany(pTHX_ OP *o) {
505 o = CALL_FPTR(indirect_old_ck_padany)(aTHX_ o);
507 if (indirect_hint()) {
509 const char *s = PL_oldbufptr, *t = PL_bufptr - 1;
511 while (s < t && isSPACE(*s)) ++s;
512 if (*s == '$' && ++s <= t) {
513 while (s < t && isSPACE(*s)) ++s;
514 while (s < t && isSPACE(*t)) --t;
515 sv = sv_2mortal(newSVpvn("$", 1));
516 sv_catpvn_nomg(sv, s, t - s + 1);
517 indirect_map_store(o, s, sv);
524 /* ... ck_method ........................................................... */
526 STATIC OP *(*indirect_old_ck_method)(pTHX_ OP *) = 0;
528 STATIC OP *indirect_ck_method(pTHX_ OP *o) {
529 if (indirect_hint()) {
530 OP *op = cUNOPo->op_first;
532 const char *s = indirect_map_fetch(op, &sv);
535 if (!SvPOK(sv) || (SvTYPE(sv) < SVt_PV))
537 sv = sv_mortalcopy(sv);
538 s = indirect_find(sv, PL_oldbufptr);
540 o = CALL_FPTR(indirect_old_ck_method)(aTHX_ o);
541 /* o may now be a method_named */
542 indirect_map_store(o, s, sv);
547 return CALL_FPTR(indirect_old_ck_method)(aTHX_ o);
550 /* ... ck_entersub ......................................................... */
552 STATIC OP *(*indirect_old_ck_entersub)(pTHX_ OP *) = 0;
554 STATIC OP *indirect_ck_entersub(pTHX_ OP *o) {
555 SV *code = indirect_hint();
557 o = CALL_FPTR(indirect_old_ck_entersub)(aTHX_ o);
560 const char *mpos, *opos;
561 SV *mnamesv, *onamesv;
567 lop = (LISTOP *) oop;
568 if (!(lop->op_flags & OPf_KIDS))
571 } while (oop->op_type != OP_PUSHMARK);
572 oop = oop->op_sibling;
575 if (mop->op_type == OP_METHOD)
576 mop = cUNOPx(mop)->op_first;
577 else if (mop->op_type != OP_METHOD_NAMED)
580 mpos = indirect_map_fetch(mop, &mnamesv);
584 opos = indirect_map_fetch(oop, &onamesv);
596 onamesv = sv_mortalcopy(onamesv);
597 mnamesv = sv_mortalcopy(mnamesv);
600 file = sv_2mortal(newSVpv(CopFILE(&PL_compiling), 0));
602 file = sv_mortalcopy(CopFILESV(&PL_compiling));
604 line = CopLINE(&PL_compiling);
614 call_sv(code, G_VOID);
627 STATIC U32 indirect_initialized = 0;
629 /* --- XS ------------------------------------------------------------------ */
631 MODULE = indirect PACKAGE = indirect
637 if (!indirect_initialized++) {
641 MY_CXT.map = ptable_new();
642 MY_CXT.linestr = NULL;
643 #if I_THREADSAFE || I_WORKAROUND_REQUIRE_PROPAGATION
644 MY_CXT.tbl = ptable_new();
650 PERL_HASH(indirect_hash, __PACKAGE__, __PACKAGE_LEN__);
652 indirect_old_ck_const = PL_check[OP_CONST];
653 PL_check[OP_CONST] = MEMBER_TO_FPTR(indirect_ck_const);
654 indirect_old_ck_rv2sv = PL_check[OP_RV2SV];
655 PL_check[OP_RV2SV] = MEMBER_TO_FPTR(indirect_ck_rv2sv);
656 indirect_old_ck_padany = PL_check[OP_PADANY];
657 PL_check[OP_PADANY] = MEMBER_TO_FPTR(indirect_ck_padany);
658 indirect_old_ck_method = PL_check[OP_METHOD];
659 PL_check[OP_METHOD] = MEMBER_TO_FPTR(indirect_ck_method);
660 indirect_old_ck_entersub = PL_check[OP_ENTERSUB];
661 PL_check[OP_ENTERSUB] = MEMBER_TO_FPTR(indirect_ck_entersub);
663 stash = gv_stashpvn(__PACKAGE__, __PACKAGE_LEN__, 1);
664 newCONSTSUB(stash, "I_THREADSAFE", newSVuv(I_THREADSAFE));
680 ud.tbl = t = ptable_new();
681 ud.owner = MY_CXT.owner;
682 ptable_walk(MY_CXT.tbl, indirect_ptable_clone, &ud);
686 MY_CXT.map = ptable_new();
687 MY_CXT.linestr = NULL;
692 level = PerlMemShared_malloc(sizeof *level);
695 SAVEDESTRUCTOR_X(indirect_thread_cleanup, level);
705 RETVAL = indirect_tag(value);