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_delete(T, K) ptable_delete(aTHX_ (T), (K))
167 #define ptable_clear(T) ptable_clear(aTHX_ (T))
168 #define ptable_free(T) ptable_free(aTHX_ (T))
170 #define MY_CXT_KEY __PACKAGE__ "::_guts" XS_VERSION
173 #if I_THREADSAFE || I_WORKAROUND_REQUIRE_PROPAGATION
174 ptable *tbl; /* It really is a ptable_hints */
187 STATIC void indirect_ptable_clone(pTHX_ ptable_ent *ent, void *ud_) {
189 indirect_hint_t *h1 = ent->val;
190 indirect_hint_t *h2 = PerlMemShared_malloc(sizeof *h2);
194 if (ud->owner != aTHX) {
197 AV *stashes = (SvTYPE(val) == SVt_PVHV && HvNAME_get(val)) ? newAV() : NULL;
198 param.stashes = stashes;
200 param.proto_perl = ud->owner;
201 h2->code = sv_dup(val, ¶m);
204 SvREFCNT_dec(stashes);
208 ptable_hints_store(ud->tbl, ent->key, h2);
209 SvREFCNT_inc(h2->code);
212 STATIC void indirect_thread_cleanup(pTHX_ void *);
214 STATIC void indirect_thread_cleanup(pTHX_ void *ud) {
220 SAVEDESTRUCTOR_X(indirect_thread_cleanup, level);
224 PerlMemShared_free(level);
225 ptable_free(MY_CXT.map);
226 ptable_hints_free(MY_CXT.tbl);
230 #endif /* I_THREADSAFE */
232 #if I_THREADSAFE || I_WORKAROUND_REQUIRE_PROPAGATION
234 STATIC SV *indirect_tag(pTHX_ SV *value) {
235 #define indirect_tag(V) indirect_tag(aTHX_ (V))
239 value = SvOK(value) && SvROK(value) ? SvRV(value) : NULL;
241 h = PerlMemShared_malloc(sizeof *h);
242 h->code = SvREFCNT_inc(value);
244 #if I_WORKAROUND_REQUIRE_PROPAGATION
249 for (si = PL_curstackinfo; si; si = si->si_prev) {
252 for (cxix = si->si_cxix; cxix >= 0; --cxix) {
253 const PERL_CONTEXT *cx = si->si_cxstack + cxix;
255 if (CxTYPE(cx) == CXt_EVAL && cx->blk_eval.old_op_type == OP_REQUIRE)
260 h->requires = requires;
264 /* We only need for the key to be an unique tag for looking up the value later.
265 * Allocated memory provides convenient unique identifiers, so that's why we
266 * use the value pointer as the key itself. */
267 ptable_hints_store(MY_CXT.tbl, value, h);
269 return newSVuv(PTR2UV(value));
272 STATIC SV *indirect_detag(pTHX_ const SV *hint) {
273 #define indirect_detag(H) indirect_detag(aTHX_ (H))
277 if (!(hint && SvOK(hint) && SvIOK(hint)))
280 h = ptable_fetch(MY_CXT.tbl, INT2PTR(void *, SvUVX(hint)));
282 #if I_WORKAROUND_REQUIRE_PROPAGATION
287 for (si = PL_curstackinfo; si; si = si->si_prev) {
290 for (cxix = si->si_cxix; cxix >= 0; --cxix) {
291 const PERL_CONTEXT *cx = si->si_cxstack + cxix;
293 if (CxTYPE(cx) == CXt_EVAL && cx->blk_eval.old_op_type == OP_REQUIRE
294 && ++requires > h->requires)
306 STATIC SV *indirect_tag(pTHX_ SV *value) {
307 #define indirect_tag(V) indirect_tag(aTHX_ (V))
310 if (SvOK(value) && SvROK(value)) {
319 #define indirect_detag(H) (((H) && SvOK(H)) ? INT2PTR(SV *, SvUVX(H)) : NULL)
321 #endif /* I_THREADSAFE || I_WORKAROUND_REQUIRE_PROPAGATION */
323 STATIC U32 indirect_hash = 0;
325 STATIC SV *indirect_hint(pTHX) {
326 #define indirect_hint() indirect_hint(aTHX)
328 #if I_HAS_PERL(5, 9, 5)
329 hint = Perl_refcounted_he_fetch(aTHX_ PL_curcop->cop_hints_hash,
331 __PACKAGE__, __PACKAGE_LEN__,
335 SV **val = hv_fetch(GvHV(PL_hintgv), __PACKAGE__, __PACKAGE_LEN__,
341 return indirect_detag(hint);
344 /* ... op -> source position ............................................... */
346 STATIC void indirect_map_store(pTHX_ const OP *o, const char *src, SV *sv) {
347 #define indirect_map_store(O, S, N) indirect_map_store(aTHX_ (O), (S), (N))
351 /* When lex_inwhat is set, we're in a quotelike environment (qq, qr, but not q)
352 * In this case the linestr has temporarly changed, but the old buffer should
353 * still be alive somewhere. */
355 if (!PL_lex_inwhat) {
356 const char *pl_linestr = SvPVX_const(PL_linestr);
357 if (MY_CXT.linestr != pl_linestr) {
358 ptable_clear(MY_CXT.map);
359 MY_CXT.linestr = pl_linestr;
364 SvUPGRADE(val, SVt_PVIV);
365 SvUVX(val) = PTR2UV(src);
370 ptable_store(MY_CXT.map, o, val);
373 STATIC const char *indirect_map_fetch(pTHX_ const OP *o, SV ** const name) {
374 #define indirect_map_fetch(O, S) indirect_map_fetch(aTHX_ (O), (S))
378 if (MY_CXT.linestr != SvPVX_const(PL_linestr))
381 val = ptable_fetch(MY_CXT.map, o);
388 return INT2PTR(const char *, SvUVX(val));
391 STATIC void indirect_map_delete(pTHX_ const OP *o) {
392 #define indirect_map_delete(O) indirect_map_delete(aTHX_ (O))
395 ptable_delete(MY_CXT.map, o);
398 /* --- Check functions ----------------------------------------------------- */
400 STATIC const char *indirect_find(pTHX_ SV *sv, const char *s) {
401 #define indirect_find(N, S) indirect_find(aTHX_ (N), (S))
403 const char *p = NULL, *r = SvPV_const(sv, len);
405 if (len >= 1 && *r == '$') {
418 p = strstr(p + 1, r);
424 /* ... ck_const ............................................................ */
426 STATIC OP *(*indirect_old_ck_const)(pTHX_ OP *) = 0;
428 STATIC OP *indirect_ck_const(pTHX_ OP *o) {
429 o = CALL_FPTR(indirect_old_ck_const)(aTHX_ o);
431 if (indirect_hint()) {
433 if (SvPOK(sv) && (SvTYPE(sv) >= SVt_PV)) {
434 indirect_map_store(o, indirect_find(sv, PL_oldbufptr), sv);
439 indirect_map_delete(o);
443 /* ... ck_rv2sv ............................................................ */
445 STATIC OP *(*indirect_old_ck_rv2sv)(pTHX_ OP *) = 0;
447 STATIC OP *indirect_ck_rv2sv(pTHX_ OP *o) {
448 if (indirect_hint()) {
449 OP *op = cUNOPo->op_first;
451 const char *name = NULL, *s;
453 OPCODE type = (OPCODE) op->op_type;
458 GV *gv = cGVOPx_gv(op);
464 if ((PL_opargs[type] & OA_CLASS_MASK) == OA_SVOP) {
465 SV *nsv = cSVOPx_sv(op);
466 if (SvPOK(nsv) && (SvTYPE(nsv) >= SVt_PV))
467 name = SvPV_const(nsv, len);
473 sv = sv_2mortal(newSVpvn("$", 1));
474 sv_catpvn_nomg(sv, name, len);
475 s = indirect_find(sv, PL_oldbufptr);
476 if (!s) { /* If it failed, retry without the current stash */
477 const char *stash = HvNAME_get(PL_curstash);
478 STRLEN stashlen = HvNAMELEN_get(PL_curstash);
480 if ((len < stashlen + 2) || strnNE(name, stash, stashlen)
481 || name[stashlen] != ':' || name[stashlen+1] != ':') {
482 /* Failed again ? Try to remove main */
485 if ((len < stashlen + 2) || strnNE(name, stash, stashlen)
486 || name[stashlen] != ':' || name[stashlen+1] != ':')
490 sv_setpvn(sv, "$", 1);
492 sv_catpvn_nomg(sv, name + stashlen, len - stashlen);
493 s = indirect_find(sv, PL_oldbufptr);
498 o = CALL_FPTR(indirect_old_ck_rv2sv)(aTHX_ o);
499 indirect_map_store(o, s, sv);
504 o = CALL_FPTR(indirect_old_ck_rv2sv)(aTHX_ o);
506 indirect_map_delete(o);
510 /* ... ck_padany ........................................................... */
512 STATIC OP *(*indirect_old_ck_padany)(pTHX_ OP *) = 0;
514 STATIC OP *indirect_ck_padany(pTHX_ OP *o) {
515 o = CALL_FPTR(indirect_old_ck_padany)(aTHX_ o);
517 if (indirect_hint()) {
519 const char *s = PL_oldbufptr, *t = PL_bufptr - 1;
521 while (s < t && isSPACE(*s)) ++s;
522 if (*s == '$' && ++s <= t) {
523 while (s < t && isSPACE(*s)) ++s;
524 while (s < t && isSPACE(*t)) --t;
525 sv = sv_2mortal(newSVpvn("$", 1));
526 sv_catpvn_nomg(sv, s, t - s + 1);
527 indirect_map_store(o, s, sv);
532 indirect_map_delete(o);
536 /* ... ck_method ........................................................... */
538 STATIC OP *(*indirect_old_ck_method)(pTHX_ OP *) = 0;
540 STATIC OP *indirect_ck_method(pTHX_ OP *o) {
541 if (indirect_hint()) {
542 OP *op = cUNOPo->op_first;
544 const char *s = indirect_map_fetch(op, &sv);
547 if (!SvPOK(sv) || (SvTYPE(sv) < SVt_PV))
549 sv = sv_mortalcopy(sv);
550 s = indirect_find(sv, PL_oldbufptr);
552 o = CALL_FPTR(indirect_old_ck_method)(aTHX_ o);
553 /* o may now be a method_named */
554 indirect_map_store(o, s, sv);
559 o = CALL_FPTR(indirect_old_ck_method)(aTHX_ o);
561 indirect_map_delete(o);
565 /* ... ck_entersub ......................................................... */
567 STATIC OP *(*indirect_old_ck_entersub)(pTHX_ OP *) = 0;
569 STATIC OP *indirect_ck_entersub(pTHX_ OP *o) {
570 SV *code = indirect_hint();
572 o = CALL_FPTR(indirect_old_ck_entersub)(aTHX_ o);
575 const char *mpos, *opos;
576 SV *mnamesv, *onamesv;
582 lop = (LISTOP *) oop;
583 if (!(lop->op_flags & OPf_KIDS))
586 } while (oop->op_type != OP_PUSHMARK);
587 oop = oop->op_sibling;
593 switch (oop->op_type) {
602 if (mop->op_type == OP_METHOD)
603 mop = cUNOPx(mop)->op_first;
604 else if (mop->op_type != OP_METHOD_NAMED)
607 mpos = indirect_map_fetch(mop, &mnamesv);
611 opos = indirect_map_fetch(oop, &onamesv);
623 onamesv = sv_mortalcopy(onamesv);
624 mnamesv = sv_mortalcopy(mnamesv);
627 file = sv_2mortal(newSVpv(CopFILE(&PL_compiling), 0));
629 file = sv_mortalcopy(CopFILESV(&PL_compiling));
631 line = CopLINE(&PL_compiling);
641 call_sv(code, G_VOID);
654 STATIC U32 indirect_initialized = 0;
656 /* --- XS ------------------------------------------------------------------ */
658 MODULE = indirect PACKAGE = indirect
664 if (!indirect_initialized++) {
668 MY_CXT.map = ptable_new();
669 MY_CXT.linestr = NULL;
670 #if I_THREADSAFE || I_WORKAROUND_REQUIRE_PROPAGATION
671 MY_CXT.tbl = ptable_new();
677 PERL_HASH(indirect_hash, __PACKAGE__, __PACKAGE_LEN__);
679 indirect_old_ck_const = PL_check[OP_CONST];
680 PL_check[OP_CONST] = MEMBER_TO_FPTR(indirect_ck_const);
681 indirect_old_ck_rv2sv = PL_check[OP_RV2SV];
682 PL_check[OP_RV2SV] = MEMBER_TO_FPTR(indirect_ck_rv2sv);
683 indirect_old_ck_padany = PL_check[OP_PADANY];
684 PL_check[OP_PADANY] = MEMBER_TO_FPTR(indirect_ck_padany);
685 indirect_old_ck_method = PL_check[OP_METHOD];
686 PL_check[OP_METHOD] = MEMBER_TO_FPTR(indirect_ck_method);
687 indirect_old_ck_entersub = PL_check[OP_ENTERSUB];
688 PL_check[OP_ENTERSUB] = MEMBER_TO_FPTR(indirect_ck_entersub);
690 stash = gv_stashpvn(__PACKAGE__, __PACKAGE_LEN__, 1);
691 newCONSTSUB(stash, "I_THREADSAFE", newSVuv(I_THREADSAFE));
707 ud.tbl = t = ptable_new();
708 ud.owner = MY_CXT.owner;
709 ptable_walk(MY_CXT.tbl, indirect_ptable_clone, &ud);
713 MY_CXT.map = ptable_new();
714 MY_CXT.linestr = NULL;
719 level = PerlMemShared_malloc(sizeof *level);
722 SAVEDESTRUCTOR_X(indirect_thread_cleanup, level);
732 RETVAL = indirect_tag(value);