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 SV *indirect_clone(pTHX_ SV *sv, tTHX owner) {
187 #define indirect_clone(S, O) indirect_clone(aTHX_ (S), (O))
192 if (SvTYPE(sv) == SVt_PVHV && HvNAME_get(sv))
195 param.stashes = stashes;
197 param.proto_perl = owner;
199 dupsv = sv_dup(sv, ¶m);
203 SvREFCNT_dec(stashes);
206 return SvREFCNT_inc(dupsv);
209 STATIC void indirect_ptable_clone(pTHX_ ptable_ent *ent, void *ud_) {
211 indirect_hint_t *h1 = ent->val;
212 indirect_hint_t *h2 = PerlMemShared_malloc(sizeof *h2);
216 if (ud->owner != aTHX)
217 h2->code = indirect_clone(h1->code, ud->owner);
219 ptable_hints_store(ud->tbl, ent->key, h2);
220 SvREFCNT_inc(h2->code);
223 STATIC void indirect_thread_cleanup(pTHX_ void *);
225 STATIC void indirect_thread_cleanup(pTHX_ void *ud) {
231 SAVEDESTRUCTOR_X(indirect_thread_cleanup, level);
235 PerlMemShared_free(level);
236 ptable_free(MY_CXT.map);
237 ptable_hints_free(MY_CXT.tbl);
241 #endif /* I_THREADSAFE */
243 #if I_THREADSAFE || I_WORKAROUND_REQUIRE_PROPAGATION
245 STATIC SV *indirect_tag(pTHX_ SV *value) {
246 #define indirect_tag(V) indirect_tag(aTHX_ (V))
250 value = SvOK(value) && SvROK(value) ? SvRV(value) : NULL;
252 h = PerlMemShared_malloc(sizeof *h);
253 h->code = SvREFCNT_inc(value);
255 #if I_WORKAROUND_REQUIRE_PROPAGATION
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 if (CxTYPE(cx) == CXt_EVAL && cx->blk_eval.old_op_type == OP_REQUIRE)
271 h->requires = requires;
275 /* We only need for the key to be an unique tag for looking up the value later.
276 * Allocated memory provides convenient unique identifiers, so that's why we
277 * use the value pointer as the key itself. */
278 ptable_hints_store(MY_CXT.tbl, value, h);
280 return newSVuv(PTR2UV(value));
283 STATIC SV *indirect_detag(pTHX_ const SV *hint) {
284 #define indirect_detag(H) indirect_detag(aTHX_ (H))
288 if (!(hint && SvOK(hint) && SvIOK(hint)))
291 h = ptable_fetch(MY_CXT.tbl, INT2PTR(void *, SvUVX(hint)));
293 #if I_WORKAROUND_REQUIRE_PROPAGATION
298 for (si = PL_curstackinfo; si; si = si->si_prev) {
301 for (cxix = si->si_cxix; cxix >= 0; --cxix) {
302 const PERL_CONTEXT *cx = si->si_cxstack + cxix;
304 if (CxTYPE(cx) == CXt_EVAL && cx->blk_eval.old_op_type == OP_REQUIRE
305 && ++requires > h->requires)
317 STATIC SV *indirect_tag(pTHX_ SV *value) {
318 #define indirect_tag(V) indirect_tag(aTHX_ (V))
321 if (SvOK(value) && SvROK(value)) {
330 #define indirect_detag(H) (((H) && SvOK(H)) ? INT2PTR(SV *, SvUVX(H)) : NULL)
332 #endif /* I_THREADSAFE || I_WORKAROUND_REQUIRE_PROPAGATION */
334 STATIC U32 indirect_hash = 0;
336 STATIC SV *indirect_hint(pTHX) {
337 #define indirect_hint() indirect_hint(aTHX)
339 #if I_HAS_PERL(5, 9, 5)
340 hint = Perl_refcounted_he_fetch(aTHX_ PL_curcop->cop_hints_hash,
342 __PACKAGE__, __PACKAGE_LEN__,
346 SV **val = hv_fetch(GvHV(PL_hintgv), __PACKAGE__, __PACKAGE_LEN__,
352 return indirect_detag(hint);
355 /* ... op -> source position ............................................... */
357 STATIC void indirect_map_store(pTHX_ const OP *o, const char *src, SV *sv) {
358 #define indirect_map_store(O, S, N) indirect_map_store(aTHX_ (O), (S), (N))
362 /* When lex_inwhat is set, we're in a quotelike environment (qq, qr, but not q)
363 * In this case the linestr has temporarly changed, but the old buffer should
364 * still be alive somewhere. */
366 if (!PL_lex_inwhat) {
367 const char *pl_linestr = SvPVX_const(PL_linestr);
368 if (MY_CXT.linestr != pl_linestr) {
369 ptable_clear(MY_CXT.map);
370 MY_CXT.linestr = pl_linestr;
375 SvUPGRADE(val, SVt_PVIV);
376 SvUVX(val) = PTR2UV(src);
381 ptable_store(MY_CXT.map, o, val);
384 STATIC const char *indirect_map_fetch(pTHX_ const OP *o, SV ** const name) {
385 #define indirect_map_fetch(O, S) indirect_map_fetch(aTHX_ (O), (S))
389 if (MY_CXT.linestr != SvPVX_const(PL_linestr))
392 val = ptable_fetch(MY_CXT.map, o);
399 return INT2PTR(const char *, SvUVX(val));
402 STATIC void indirect_map_delete(pTHX_ const OP *o) {
403 #define indirect_map_delete(O) indirect_map_delete(aTHX_ (O))
406 ptable_store(MY_CXT.map, o, NULL);
409 /* --- Check functions ----------------------------------------------------- */
411 STATIC const char *indirect_find(pTHX_ SV *sv, const char *s) {
412 #define indirect_find(N, S) indirect_find(aTHX_ (N), (S))
414 const char *p = NULL, *r = SvPV_const(sv, len);
416 if (len >= 1 && *r == '$') {
429 p = strstr(p + 1, r);
435 /* ... ck_const ............................................................ */
437 STATIC OP *(*indirect_old_ck_const)(pTHX_ OP *) = 0;
439 STATIC OP *indirect_ck_const(pTHX_ OP *o) {
440 o = CALL_FPTR(indirect_old_ck_const)(aTHX_ o);
442 if (indirect_hint()) {
444 if (SvPOK(sv) && (SvTYPE(sv) >= SVt_PV)) {
445 indirect_map_store(o, indirect_find(sv, PL_oldbufptr), sv);
450 indirect_map_delete(o);
454 /* ... ck_rv2sv ............................................................ */
456 STATIC OP *(*indirect_old_ck_rv2sv)(pTHX_ OP *) = 0;
458 STATIC OP *indirect_ck_rv2sv(pTHX_ OP *o) {
459 if (indirect_hint()) {
460 OP *op = cUNOPo->op_first;
462 const char *name = NULL, *s;
464 OPCODE type = (OPCODE) op->op_type;
469 GV *gv = cGVOPx_gv(op);
475 if ((PL_opargs[type] & OA_CLASS_MASK) == OA_SVOP) {
476 SV *nsv = cSVOPx_sv(op);
477 if (SvPOK(nsv) && (SvTYPE(nsv) >= SVt_PV))
478 name = SvPV_const(nsv, len);
484 sv = sv_2mortal(newSVpvn("$", 1));
485 sv_catpvn_nomg(sv, name, len);
486 s = indirect_find(sv, PL_oldbufptr);
487 if (!s) { /* If it failed, retry without the current stash */
488 const char *stash = HvNAME_get(PL_curstash);
489 STRLEN stashlen = HvNAMELEN_get(PL_curstash);
491 if ((len < stashlen + 2) || strnNE(name, stash, stashlen)
492 || name[stashlen] != ':' || name[stashlen+1] != ':') {
493 /* Failed again ? Try to remove main */
496 if ((len < stashlen + 2) || strnNE(name, stash, stashlen)
497 || name[stashlen] != ':' || name[stashlen+1] != ':')
501 sv_setpvn(sv, "$", 1);
503 sv_catpvn_nomg(sv, name + stashlen, len - stashlen);
504 s = indirect_find(sv, PL_oldbufptr);
509 o = CALL_FPTR(indirect_old_ck_rv2sv)(aTHX_ o);
510 indirect_map_store(o, s, sv);
515 o = CALL_FPTR(indirect_old_ck_rv2sv)(aTHX_ o);
517 indirect_map_delete(o);
521 /* ... ck_padany ........................................................... */
523 STATIC OP *(*indirect_old_ck_padany)(pTHX_ OP *) = 0;
525 STATIC OP *indirect_ck_padany(pTHX_ OP *o) {
526 o = CALL_FPTR(indirect_old_ck_padany)(aTHX_ o);
528 if (indirect_hint()) {
530 const char *s = PL_oldbufptr, *t = PL_bufptr - 1;
532 while (s < t && isSPACE(*s)) ++s;
533 if (*s == '$' && ++s <= t) {
534 while (s < t && isSPACE(*s)) ++s;
535 while (s < t && isSPACE(*t)) --t;
536 sv = sv_2mortal(newSVpvn("$", 1));
537 sv_catpvn_nomg(sv, s, t - s + 1);
538 indirect_map_store(o, s, sv);
543 indirect_map_delete(o);
547 /* ... ck_method ........................................................... */
549 STATIC OP *(*indirect_old_ck_method)(pTHX_ OP *) = 0;
551 STATIC OP *indirect_ck_method(pTHX_ OP *o) {
552 if (indirect_hint()) {
553 OP *op = cUNOPo->op_first;
555 const char *s = indirect_map_fetch(op, &sv);
558 if (!SvPOK(sv) || (SvTYPE(sv) < SVt_PV))
560 sv = sv_mortalcopy(sv);
561 s = indirect_find(sv, PL_oldbufptr);
563 o = CALL_FPTR(indirect_old_ck_method)(aTHX_ o);
564 /* o may now be a method_named */
565 indirect_map_store(o, s, sv);
570 o = CALL_FPTR(indirect_old_ck_method)(aTHX_ o);
572 indirect_map_delete(o);
576 /* ... ck_entersub ......................................................... */
578 STATIC OP *(*indirect_old_ck_entersub)(pTHX_ OP *) = 0;
580 STATIC OP *indirect_ck_entersub(pTHX_ OP *o) {
581 SV *code = indirect_hint();
583 o = CALL_FPTR(indirect_old_ck_entersub)(aTHX_ o);
586 const char *mpos, *opos;
587 SV *mnamesv, *onamesv;
593 lop = (LISTOP *) oop;
594 if (!(lop->op_flags & OPf_KIDS))
597 } while (oop->op_type != OP_PUSHMARK);
598 oop = oop->op_sibling;
604 switch (oop->op_type) {
613 if (mop->op_type == OP_METHOD)
614 mop = cUNOPx(mop)->op_first;
615 else if (mop->op_type != OP_METHOD_NAMED)
618 mpos = indirect_map_fetch(mop, &mnamesv);
622 opos = indirect_map_fetch(oop, &onamesv);
634 onamesv = sv_mortalcopy(onamesv);
635 mnamesv = sv_mortalcopy(mnamesv);
638 file = sv_2mortal(newSVpv(CopFILE(&PL_compiling), 0));
640 file = sv_mortalcopy(CopFILESV(&PL_compiling));
642 line = CopLINE(&PL_compiling);
652 call_sv(code, G_VOID);
665 STATIC U32 indirect_initialized = 0;
667 /* --- XS ------------------------------------------------------------------ */
669 MODULE = indirect PACKAGE = indirect
675 if (!indirect_initialized++) {
679 MY_CXT.map = ptable_new();
680 MY_CXT.linestr = NULL;
681 #if I_THREADSAFE || I_WORKAROUND_REQUIRE_PROPAGATION
682 MY_CXT.tbl = ptable_new();
688 PERL_HASH(indirect_hash, __PACKAGE__, __PACKAGE_LEN__);
690 indirect_old_ck_const = PL_check[OP_CONST];
691 PL_check[OP_CONST] = MEMBER_TO_FPTR(indirect_ck_const);
692 indirect_old_ck_rv2sv = PL_check[OP_RV2SV];
693 PL_check[OP_RV2SV] = MEMBER_TO_FPTR(indirect_ck_rv2sv);
694 indirect_old_ck_padany = PL_check[OP_PADANY];
695 PL_check[OP_PADANY] = MEMBER_TO_FPTR(indirect_ck_padany);
696 indirect_old_ck_method = PL_check[OP_METHOD];
697 PL_check[OP_METHOD] = MEMBER_TO_FPTR(indirect_ck_method);
698 indirect_old_ck_entersub = PL_check[OP_ENTERSUB];
699 PL_check[OP_ENTERSUB] = MEMBER_TO_FPTR(indirect_ck_entersub);
701 stash = gv_stashpvn(__PACKAGE__, __PACKAGE_LEN__, 1);
702 newCONSTSUB(stash, "I_THREADSAFE", newSVuv(I_THREADSAFE));
718 ud.tbl = t = ptable_new();
719 ud.owner = MY_CXT.owner;
720 ptable_walk(MY_CXT.tbl, indirect_ptable_clone, &ud);
724 MY_CXT.map = ptable_new();
725 MY_CXT.linestr = NULL;
730 level = PerlMemShared_malloc(sizeof *level);
733 SAVEDESTRUCTOR_X(indirect_thread_cleanup, level);
743 RETVAL = indirect_tag(value);