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 #define PTABLE_VAL_FREE(V) \
138 { indirect_hint_t *h = (V); SvREFCNT_dec(h->code); PerlMemShared_free(h); }
147 #define ptable_hints_store(T, K, V) ptable_hints_store(aTHX_ (T), (K), (V))
148 #define ptable_hints_free(T) ptable_hints_free(aTHX_ (T))
150 #endif /* I_THREADSAFE || I_WORKAROUND_REQUIRE_PROPAGATION */
152 /* Define the op->str ptable here because we need to be able to clean it during
155 #define PTABLE_NAME ptable
156 #define PTABLE_VAL_FREE(V) SvREFCNT_dec(V)
165 #define ptable_store(T, K, V) ptable_store(aTHX_ (T), (K), (V))
166 #define ptable_clear(T) ptable_clear(aTHX_ (T))
167 #define ptable_free(T) ptable_free(aTHX_ (T))
169 #define MY_CXT_KEY __PACKAGE__ "::_guts" XS_VERSION
172 #if I_THREADSAFE || I_WORKAROUND_REQUIRE_PROPAGATION
173 ptable *tbl; /* It really is a ptable_hints */
186 STATIC void indirect_ptable_clone(pTHX_ ptable_ent *ent, void *ud_) {
188 indirect_hint_t *h1 = ent->val;
189 indirect_hint_t *h2 = PerlMemShared_malloc(sizeof *h2);
193 if (ud->owner != aTHX) {
196 AV *stashes = (SvTYPE(val) == SVt_PVHV && HvNAME_get(val)) ? newAV() : NULL;
197 param.stashes = stashes;
199 param.proto_perl = ud->owner;
200 h2->code = sv_dup(val, ¶m);
203 SvREFCNT_dec(stashes);
207 ptable_hints_store(ud->tbl, ent->key, h2);
208 SvREFCNT_inc(h2->code);
211 STATIC void indirect_thread_cleanup(pTHX_ void *);
213 STATIC void indirect_thread_cleanup(pTHX_ void *ud) {
219 SAVEDESTRUCTOR_X(indirect_thread_cleanup, level);
223 PerlMemShared_free(level);
224 ptable_free(MY_CXT.map);
225 ptable_hints_free(MY_CXT.tbl);
229 #endif /* I_THREADSAFE */
231 #if I_THREADSAFE || I_WORKAROUND_REQUIRE_PROPAGATION
233 STATIC SV *indirect_tag(pTHX_ SV *value) {
234 #define indirect_tag(V) indirect_tag(aTHX_ (V))
238 value = SvOK(value) && SvROK(value) ? SvRV(value) : NULL;
240 h = PerlMemShared_malloc(sizeof *h);
241 h->code = SvREFCNT_inc(value);
243 #if I_WORKAROUND_REQUIRE_PROPAGATION
248 for (si = PL_curstackinfo; si; si = si->si_prev) {
251 for (cxix = si->si_cxix; cxix >= 0; --cxix) {
252 const PERL_CONTEXT *cx = si->si_cxstack + cxix;
254 if (CxTYPE(cx) == CXt_EVAL && cx->blk_eval.old_op_type == OP_REQUIRE)
259 h->requires = requires;
263 /* We only need for the key to be an unique tag for looking up the value later.
264 * Allocated memory provides convenient unique identifiers, so that's why we
265 * use the value pointer as the key itself. */
266 ptable_hints_store(MY_CXT.tbl, value, h);
268 return newSVuv(PTR2UV(value));
271 STATIC SV *indirect_detag(pTHX_ const SV *hint) {
272 #define indirect_detag(H) indirect_detag(aTHX_ (H))
276 if (!(hint && SvOK(hint) && SvIOK(hint)))
279 h = ptable_fetch(MY_CXT.tbl, INT2PTR(void *, SvUVX(hint)));
281 #if I_WORKAROUND_REQUIRE_PROPAGATION
286 for (si = PL_curstackinfo; si; si = si->si_prev) {
289 for (cxix = si->si_cxix; cxix >= 0; --cxix) {
290 const PERL_CONTEXT *cx = si->si_cxstack + cxix;
292 if (CxTYPE(cx) == CXt_EVAL && cx->blk_eval.old_op_type == OP_REQUIRE
293 && ++requires > h->requires)
305 STATIC SV *indirect_tag(pTHX_ SV *value) {
306 #define indirect_tag(V) indirect_tag(aTHX_ (V))
309 if (SvOK(value) && SvROK(value)) {
318 #define indirect_detag(H) (((H) && SvOK(H)) ? INT2PTR(SV *, SvUVX(H)) : NULL)
320 #endif /* I_THREADSAFE || I_WORKAROUND_REQUIRE_PROPAGATION */
322 STATIC U32 indirect_hash = 0;
324 STATIC SV *indirect_hint(pTHX) {
325 #define indirect_hint() indirect_hint(aTHX)
327 #if I_HAS_PERL(5, 9, 5)
328 hint = Perl_refcounted_he_fetch(aTHX_ PL_curcop->cop_hints_hash,
330 __PACKAGE__, __PACKAGE_LEN__,
334 SV **val = hv_fetch(GvHV(PL_hintgv), __PACKAGE__, __PACKAGE_LEN__,
340 return indirect_detag(hint);
343 /* ... op -> source position ............................................... */
345 STATIC void indirect_map_store(pTHX_ const OP *o, const char *src, SV *sv) {
346 #define indirect_map_store(O, S, N) indirect_map_store(aTHX_ (O), (S), (N))
350 /* When lex_inwhat is set, we're in a quotelike environment (qq, qr, but not q)
351 * In this case the linestr has temporarly changed, but the old buffer should
352 * still be alive somewhere. */
354 if (!PL_lex_inwhat) {
355 const char *pl_linestr = SvPVX_const(PL_linestr);
356 if (MY_CXT.linestr != pl_linestr) {
357 ptable_clear(MY_CXT.map);
358 MY_CXT.linestr = pl_linestr;
363 SvUPGRADE(val, SVt_PVIV);
364 SvUVX(val) = PTR2UV(src);
369 ptable_store(MY_CXT.map, o, val);
372 STATIC const char *indirect_map_fetch(pTHX_ const OP *o, SV ** const name) {
373 #define indirect_map_fetch(O, S) indirect_map_fetch(aTHX_ (O), (S))
377 if (MY_CXT.linestr != SvPVX_const(PL_linestr))
380 val = ptable_fetch(MY_CXT.map, o);
387 return INT2PTR(const char *, SvUVX(val));
390 STATIC void indirect_map_delete(pTHX_ const OP *o) {
391 #define indirect_map_delete(O) indirect_map_delete(aTHX_ (O))
394 ptable_store(MY_CXT.map, o, NULL);
397 /* --- Check functions ----------------------------------------------------- */
399 STATIC const char *indirect_find(pTHX_ SV *sv, const char *s) {
400 #define indirect_find(N, S) indirect_find(aTHX_ (N), (S))
402 const char *p = NULL, *r = SvPV_const(sv, len);
404 if (len >= 1 && *r == '$') {
417 p = strstr(p + 1, r);
423 /* ... ck_const ............................................................ */
425 STATIC OP *(*indirect_old_ck_const)(pTHX_ OP *) = 0;
427 STATIC OP *indirect_ck_const(pTHX_ OP *o) {
428 o = CALL_FPTR(indirect_old_ck_const)(aTHX_ o);
430 if (indirect_hint()) {
432 if (SvPOK(sv) && (SvTYPE(sv) >= SVt_PV)) {
433 indirect_map_store(o, indirect_find(sv, PL_oldbufptr), sv);
438 indirect_map_delete(o);
442 /* ... ck_rv2sv ............................................................ */
444 STATIC OP *(*indirect_old_ck_rv2sv)(pTHX_ OP *) = 0;
446 STATIC OP *indirect_ck_rv2sv(pTHX_ OP *o) {
447 if (indirect_hint()) {
448 OP *op = cUNOPo->op_first;
450 const char *name = NULL, *s;
452 OPCODE type = (OPCODE) op->op_type;
457 GV *gv = cGVOPx_gv(op);
463 if ((PL_opargs[type] & OA_CLASS_MASK) == OA_SVOP) {
464 SV *nsv = cSVOPx_sv(op);
465 if (SvPOK(nsv) && (SvTYPE(nsv) >= SVt_PV))
466 name = SvPV_const(nsv, len);
472 sv = sv_2mortal(newSVpvn("$", 1));
473 sv_catpvn_nomg(sv, name, len);
474 s = indirect_find(sv, PL_oldbufptr);
475 if (!s) { /* If it failed, retry without the current stash */
476 const char *stash = HvNAME_get(PL_curstash);
477 STRLEN stashlen = HvNAMELEN_get(PL_curstash);
479 if ((len < stashlen + 2) || strnNE(name, stash, stashlen)
480 || name[stashlen] != ':' || name[stashlen+1] != ':') {
481 /* Failed again ? Try to remove main */
484 if ((len < stashlen + 2) || strnNE(name, stash, stashlen)
485 || name[stashlen] != ':' || name[stashlen+1] != ':')
489 sv_setpvn(sv, "$", 1);
491 sv_catpvn_nomg(sv, name + stashlen, len - stashlen);
492 s = indirect_find(sv, PL_oldbufptr);
497 o = CALL_FPTR(indirect_old_ck_rv2sv)(aTHX_ o);
498 indirect_map_store(o, s, sv);
503 o = CALL_FPTR(indirect_old_ck_rv2sv)(aTHX_ o);
505 indirect_map_delete(o);
509 /* ... ck_padany ........................................................... */
511 STATIC OP *(*indirect_old_ck_padany)(pTHX_ OP *) = 0;
513 STATIC OP *indirect_ck_padany(pTHX_ OP *o) {
514 o = CALL_FPTR(indirect_old_ck_padany)(aTHX_ o);
516 if (indirect_hint()) {
518 const char *s = PL_oldbufptr, *t = PL_bufptr - 1;
520 while (s < t && isSPACE(*s)) ++s;
521 if (*s == '$' && ++s <= t) {
522 while (s < t && isSPACE(*s)) ++s;
523 while (s < t && isSPACE(*t)) --t;
524 sv = sv_2mortal(newSVpvn("$", 1));
525 sv_catpvn_nomg(sv, s, t - s + 1);
526 indirect_map_store(o, s, sv);
531 indirect_map_delete(o);
535 /* ... ck_method ........................................................... */
537 STATIC OP *(*indirect_old_ck_method)(pTHX_ OP *) = 0;
539 STATIC OP *indirect_ck_method(pTHX_ OP *o) {
540 if (indirect_hint()) {
541 OP *op = cUNOPo->op_first;
543 const char *s = indirect_map_fetch(op, &sv);
546 if (!SvPOK(sv) || (SvTYPE(sv) < SVt_PV))
548 sv = sv_mortalcopy(sv);
549 s = indirect_find(sv, PL_oldbufptr);
551 o = CALL_FPTR(indirect_old_ck_method)(aTHX_ o);
552 /* o may now be a method_named */
553 indirect_map_store(o, s, sv);
558 o = CALL_FPTR(indirect_old_ck_method)(aTHX_ o);
560 indirect_map_delete(o);
564 /* ... ck_entersub ......................................................... */
566 STATIC OP *(*indirect_old_ck_entersub)(pTHX_ OP *) = 0;
568 STATIC OP *indirect_ck_entersub(pTHX_ OP *o) {
569 SV *code = indirect_hint();
571 o = CALL_FPTR(indirect_old_ck_entersub)(aTHX_ o);
574 const char *mpos, *opos;
575 SV *mnamesv, *onamesv;
581 lop = (LISTOP *) oop;
582 if (!(lop->op_flags & OPf_KIDS))
585 } while (oop->op_type != OP_PUSHMARK);
586 oop = oop->op_sibling;
592 switch (oop->op_type) {
601 if (mop->op_type == OP_METHOD)
602 mop = cUNOPx(mop)->op_first;
603 else if (mop->op_type != OP_METHOD_NAMED)
606 mpos = indirect_map_fetch(mop, &mnamesv);
610 opos = indirect_map_fetch(oop, &onamesv);
622 onamesv = sv_mortalcopy(onamesv);
623 mnamesv = sv_mortalcopy(mnamesv);
626 file = sv_2mortal(newSVpv(CopFILE(&PL_compiling), 0));
628 file = sv_mortalcopy(CopFILESV(&PL_compiling));
630 line = CopLINE(&PL_compiling);
640 call_sv(code, G_VOID);
653 STATIC U32 indirect_initialized = 0;
655 /* --- XS ------------------------------------------------------------------ */
657 MODULE = indirect PACKAGE = indirect
663 if (!indirect_initialized++) {
667 MY_CXT.map = ptable_new();
668 MY_CXT.linestr = NULL;
669 #if I_THREADSAFE || I_WORKAROUND_REQUIRE_PROPAGATION
670 MY_CXT.tbl = ptable_new();
676 PERL_HASH(indirect_hash, __PACKAGE__, __PACKAGE_LEN__);
678 indirect_old_ck_const = PL_check[OP_CONST];
679 PL_check[OP_CONST] = MEMBER_TO_FPTR(indirect_ck_const);
680 indirect_old_ck_rv2sv = PL_check[OP_RV2SV];
681 PL_check[OP_RV2SV] = MEMBER_TO_FPTR(indirect_ck_rv2sv);
682 indirect_old_ck_padany = PL_check[OP_PADANY];
683 PL_check[OP_PADANY] = MEMBER_TO_FPTR(indirect_ck_padany);
684 indirect_old_ck_method = PL_check[OP_METHOD];
685 PL_check[OP_METHOD] = MEMBER_TO_FPTR(indirect_ck_method);
686 indirect_old_ck_entersub = PL_check[OP_ENTERSUB];
687 PL_check[OP_ENTERSUB] = MEMBER_TO_FPTR(indirect_ck_entersub);
689 stash = gv_stashpvn(__PACKAGE__, __PACKAGE_LEN__, 1);
690 newCONSTSUB(stash, "I_THREADSAFE", newSVuv(I_THREADSAFE));
706 ud.tbl = t = ptable_new();
707 ud.owner = MY_CXT.owner;
708 ptable_walk(MY_CXT.tbl, indirect_ptable_clone, &ud);
712 MY_CXT.map = ptable_new();
713 MY_CXT.linestr = NULL;
718 level = PerlMemShared_malloc(sizeof *level);
721 SAVEDESTRUCTOR_X(indirect_thread_cleanup, level);
731 RETVAL = indirect_tag(value);