/* pp_ctl.c * * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by Larry Wall and others * * You may distribute under the terms of either the GNU General Public * License or the Artistic License, as specified in the README file. * */ /* * Now far ahead the Road has gone, * And I must follow, if I can, * Pursuing it with eager feet, * Until it joins some larger way * Where many paths and errands meet. * And whither then? I cannot say. * * [Bilbo on p.35 of _The Lord of the Rings_, I/i: "A Long-Expected Party"] */ /* This file contains control-oriented pp ("push/pop") functions that * execute the opcodes that make up a perl program. A typical pp function * expects to find its arguments on the stack, and usually pushes its * results onto the stack, hence the 'pp' terminology. Each OP structure * contains a pointer to the relevant pp_foo() function. * * Control-oriented means things like pp_enteriter() and pp_next(), which * alter the flow of control of the program. */ #include "EXTERN.h" #define PERL_IN_PP_CTL_C #include "perl.h" #define DOCATCH(o) ((CATCH_GET == TRUE) ? docatch(o) : (o)) #define dopoptosub(plop) dopoptosub_at(cxstack, (plop)) PP(pp_wantarray) { dSP; I32 cxix; const PERL_CONTEXT *cx; EXTEND(SP, 1); if (PL_op->op_private & OPpOFFBYONE) { if (!(cx = caller_cx(1,NULL))) RETPUSHUNDEF; } else { cxix = dopoptosub(cxstack_ix); if (cxix < 0) RETPUSHUNDEF; cx = &cxstack[cxix]; } switch (cx->blk_gimme) { case G_ARRAY: RETPUSHYES; case G_SCALAR: RETPUSHNO; default: RETPUSHUNDEF; } } PP(pp_regcreset) { TAINT_NOT; return NORMAL; } PP(pp_regcomp) { dSP; PMOP *pm = (PMOP*)cLOGOP->op_other; SV **args; int nargs; REGEXP *re = NULL; REGEXP *new_re; const regexp_engine *eng; bool is_bare_re= FALSE; if (PL_op->op_flags & OPf_STACKED) { dMARK; nargs = SP - MARK; args = ++MARK; } else { nargs = 1; args = SP; } /* prevent recompiling under /o and ithreads. */ #if defined(USE_ITHREADS) if (pm->op_pmflags & PMf_KEEP && PM_GETRE(pm)) { SP = args-1; RETURN; } #endif re = PM_GETRE(pm); assert (re != (REGEXP*) &PL_sv_undef); eng = re ? RX_ENGINE(re) : current_re_engine(); /* In the below logic: these are basically the same - check if this regcomp is part of a split. (PL_op->op_pmflags & PMf_split ) (PL_op->op_next->op_type == OP_PUSHRE) We could add a new mask for this and copy the PMf_split, if we did some bit definition fiddling first. For now we leave this */ new_re = (eng->op_comp ? eng->op_comp : &Perl_re_op_compile )(aTHX_ args, nargs, pm->op_code_list, eng, re, &is_bare_re, (pm->op_pmflags & RXf_PMf_FLAGCOPYMASK), pm->op_pmflags | (PL_op->op_flags & OPf_SPECIAL ? PMf_USE_RE_EVAL : 0)); if (pm->op_pmflags & PMf_HAS_CV) ReANY(new_re)->qr_anoncv = (CV*) SvREFCNT_inc(PAD_SV(PL_op->op_targ)); if (is_bare_re) { REGEXP *tmp; /* The match's LHS's get-magic might need to access this op's regexp (e.g. $' =~ /$re/ while foo; see bug 70764). So we must call get-magic now before we replace the regexp. Hopefully this hack can be replaced with the approach described at http://www.nntp.perl.org/group/perl.perl5.porters/2007/03/msg122415.html some day. */ if (pm->op_type == OP_MATCH) { SV *lhs; const bool was_tainted = TAINT_get; if (pm->op_flags & OPf_STACKED) lhs = args[-1]; else if (pm->op_targ) lhs = PAD_SV(pm->op_targ); else lhs = DEFSV; SvGETMAGIC(lhs); /* Restore the previous value of PL_tainted (which may have been modified by get-magic), to avoid incorrectly setting the RXf_TAINTED flag with RX_TAINT_on further down. */ TAINT_set(was_tainted); #ifdef NO_TAINT_SUPPORT PERL_UNUSED_VAR(was_tainted); #endif } tmp = reg_temp_copy(NULL, new_re); ReREFCNT_dec(new_re); new_re = tmp; } if (re != new_re) { ReREFCNT_dec(re); PM_SETRE(pm, new_re); } if (TAINTING_get && TAINT_get) { SvTAINTED_on((SV*)new_re); RX_TAINT_on(new_re); } #if !defined(USE_ITHREADS) /* can't change the optree at runtime either */ /* PMf_KEEP is handled differently under threads to avoid these problems */ if (!RX_PRELEN(PM_GETRE(pm)) && PL_curpm) pm = PL_curpm; if (pm->op_pmflags & PMf_KEEP) { pm->op_private &= ~OPpRUNTIME; /* no point compiling again */ cLOGOP->op_first->op_next = PL_op->op_next; } #endif SP = args-1; RETURN; } PP(pp_substcont) { dSP; PERL_CONTEXT *cx = &cxstack[cxstack_ix]; PMOP * const pm = (PMOP*) cLOGOP->op_other; SV * const dstr = cx->sb_dstr; char *s = cx->sb_s; char *m = cx->sb_m; char *orig = cx->sb_orig; REGEXP * const rx = cx->sb_rx; SV *nsv = NULL; REGEXP *old = PM_GETRE(pm); PERL_ASYNC_CHECK(); if(old != rx) { if(old) ReREFCNT_dec(old); PM_SETRE(pm,ReREFCNT_inc(rx)); } rxres_restore(&cx->sb_rxres, rx); if (cx->sb_iters++) { const SSize_t saviters = cx->sb_iters; if (cx->sb_iters > cx->sb_maxiters) DIE(aTHX_ "Substitution loop"); SvGETMAGIC(TOPs); /* possibly clear taint on $1 etc: #67962 */ /* See "how taint works" above pp_subst() */ if (SvTAINTED(TOPs)) cx->sb_rxtainted |= SUBST_TAINT_REPL; sv_catsv_nomg(dstr, POPs); if (CxONCE(cx) || s < orig || !CALLREGEXEC(rx, s, cx->sb_strend, orig, (s == m), cx->sb_targ, NULL, (REXEC_IGNOREPOS|REXEC_NOT_FIRST|REXEC_FAIL_ON_UNDERFLOW))) { SV *targ = cx->sb_targ; assert(cx->sb_strend >= s); if(cx->sb_strend > s) { if (DO_UTF8(dstr) && !SvUTF8(targ)) sv_catpvn_nomg_utf8_upgrade(dstr, s, cx->sb_strend - s, nsv); else sv_catpvn_nomg(dstr, s, cx->sb_strend - s); } if (RX_MATCH_TAINTED(rx)) /* run time pattern taint, eg locale */ cx->sb_rxtainted |= SUBST_TAINT_PAT; if (pm->op_pmflags & PMf_NONDESTRUCT) { PUSHs(dstr); /* From here on down we're using the copy, and leaving the original untouched. */ targ = dstr; } else { SV_CHECK_THINKFIRST_COW_DROP(targ); if (isGV(targ)) Perl_croak_no_modify(); SvPV_free(targ); SvPV_set(targ, SvPVX(dstr)); SvCUR_set(targ, SvCUR(dstr)); SvLEN_set(targ, SvLEN(dstr)); if (DO_UTF8(dstr)) SvUTF8_on(targ); SvPV_set(dstr, NULL); PL_tainted = 0; mPUSHi(saviters - 1); (void)SvPOK_only_UTF8(targ); } /* update the taint state of various various variables in * preparation for final exit. * See "how taint works" above pp_subst() */ if (TAINTING_get) { if ((cx->sb_rxtainted & SUBST_TAINT_PAT) || ((cx->sb_rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_RETAINT)) == (SUBST_TAINT_STR|SUBST_TAINT_RETAINT)) ) (RX_MATCH_TAINTED_on(rx)); /* taint $1 et al */ if (!(cx->sb_rxtainted & SUBST_TAINT_BOOLRET) && (cx->sb_rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_PAT)) ) SvTAINTED_on(TOPs); /* taint return value */ /* needed for mg_set below */ TAINT_set( cBOOL(cx->sb_rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_PAT|SUBST_TAINT_REPL)) ); SvTAINT(TARG); } /* PL_tainted must be correctly set for this mg_set */ SvSETMAGIC(TARG); TAINT_NOT; LEAVE_SCOPE(cx->sb_oldsave); POPSUBST(cx); PERL_ASYNC_CHECK(); RETURNOP(pm->op_next); NOT_REACHED; /* NOTREACHED */ } cx->sb_iters = saviters; } if (RX_MATCH_COPIED(rx) && RX_SUBBEG(rx) != orig) { m = s; s = orig; assert(!RX_SUBOFFSET(rx)); cx->sb_orig = orig = RX_SUBBEG(rx); s = orig + (m - s); cx->sb_strend = s + (cx->sb_strend - m); } cx->sb_m = m = RX_OFFS(rx)[0].start + orig; if (m > s) { if (DO_UTF8(dstr) && !SvUTF8(cx->sb_targ)) sv_catpvn_nomg_utf8_upgrade(dstr, s, m - s, nsv); else sv_catpvn_nomg(dstr, s, m-s); } cx->sb_s = RX_OFFS(rx)[0].end + orig; { /* Update the pos() information. */ SV * const sv = (pm->op_pmflags & PMf_NONDESTRUCT) ? cx->sb_dstr : cx->sb_targ; MAGIC *mg; /* the string being matched against may no longer be a string, * e.g. $_=0; s/.../$_++/ge */ if (!SvPOK(sv)) SvPV_force_nomg_nolen(sv); if (!(mg = mg_find_mglob(sv))) { mg = sv_magicext_mglob(sv); } MgBYTEPOS_set(mg, sv, SvPVX(sv), m - orig); } if (old != rx) (void)ReREFCNT_inc(rx); /* update the taint state of various various variables in preparation * for calling the code block. * See "how taint works" above pp_subst() */ if (TAINTING_get) { if (RX_MATCH_TAINTED(rx)) /* run time pattern taint, eg locale */ cx->sb_rxtainted |= SUBST_TAINT_PAT; if ((cx->sb_rxtainted & SUBST_TAINT_PAT) || ((cx->sb_rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_RETAINT)) == (SUBST_TAINT_STR|SUBST_TAINT_RETAINT)) ) (RX_MATCH_TAINTED_on(rx)); /* taint $1 et al */ if (cx->sb_iters > 1 && (cx->sb_rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_PAT|SUBST_TAINT_REPL))) SvTAINTED_on((pm->op_pmflags & PMf_NONDESTRUCT) ? cx->sb_dstr : cx->sb_targ); TAINT_NOT; } rxres_save(&cx->sb_rxres, rx); PL_curpm = pm; RETURNOP(pm->op_pmstashstartu.op_pmreplstart); } void Perl_rxres_save(pTHX_ void **rsp, REGEXP *rx) { UV *p = (UV*)*rsp; U32 i; PERL_ARGS_ASSERT_RXRES_SAVE; PERL_UNUSED_CONTEXT; if (!p || p[1] < RX_NPARENS(rx)) { #ifdef PERL_ANY_COW i = 7 + (RX_NPARENS(rx)+1) * 2; #else i = 6 + (RX_NPARENS(rx)+1) * 2; #endif if (!p) Newx(p, i, UV); else Renew(p, i, UV); *rsp = (void*)p; } /* what (if anything) to free on croak */ *p++ = PTR2UV(RX_MATCH_COPIED(rx) ? RX_SUBBEG(rx) : NULL); RX_MATCH_COPIED_off(rx); *p++ = RX_NPARENS(rx); #ifdef PERL_ANY_COW *p++ = PTR2UV(RX_SAVED_COPY(rx)); RX_SAVED_COPY(rx) = NULL; #endif *p++ = PTR2UV(RX_SUBBEG(rx)); *p++ = (UV)RX_SUBLEN(rx); *p++ = (UV)RX_SUBOFFSET(rx); *p++ = (UV)RX_SUBCOFFSET(rx); for (i = 0; i <= RX_NPARENS(rx); ++i) { *p++ = (UV)RX_OFFS(rx)[i].start; *p++ = (UV)RX_OFFS(rx)[i].end; } } static void S_rxres_restore(pTHX_ void **rsp, REGEXP *rx) { UV *p = (UV*)*rsp; U32 i; PERL_ARGS_ASSERT_RXRES_RESTORE; PERL_UNUSED_CONTEXT; RX_MATCH_COPY_FREE(rx); RX_MATCH_COPIED_set(rx, *p); *p++ = 0; RX_NPARENS(rx) = *p++; #ifdef PERL_ANY_COW if (RX_SAVED_COPY(rx)) SvREFCNT_dec (RX_SAVED_COPY(rx)); RX_SAVED_COPY(rx) = INT2PTR(SV*,*p); *p++ = 0; #endif RX_SUBBEG(rx) = INT2PTR(char*,*p++); RX_SUBLEN(rx) = (I32)(*p++); RX_SUBOFFSET(rx) = (I32)*p++; RX_SUBCOFFSET(rx) = (I32)*p++; for (i = 0; i <= RX_NPARENS(rx); ++i) { RX_OFFS(rx)[i].start = (I32)(*p++); RX_OFFS(rx)[i].end = (I32)(*p++); } } static void S_rxres_free(pTHX_ void **rsp) { UV * const p = (UV*)*rsp; PERL_ARGS_ASSERT_RXRES_FREE; PERL_UNUSED_CONTEXT; if (p) { void *tmp = INT2PTR(char*,*p); #ifdef PERL_POISON #ifdef PERL_ANY_COW U32 i = 9 + p[1] * 2; #else U32 i = 8 + p[1] * 2; #endif #endif #ifdef PERL_ANY_COW SvREFCNT_dec (INT2PTR(SV*,p[2])); #endif #ifdef PERL_POISON PoisonFree(p, i, sizeof(UV)); #endif Safefree(tmp); Safefree(p); *rsp = NULL; } } #define FORM_NUM_BLANK (1<<30) #define FORM_NUM_POINT (1<<29) PP(pp_formline) { dSP; dMARK; dORIGMARK; SV * const tmpForm = *++MARK; SV *formsv; /* contains text of original format */ U32 *fpc; /* format ops program counter */ char *t; /* current append position in target string */ const char *f; /* current position in format string */ I32 arg; SV *sv = NULL; /* current item */ const char *item = NULL;/* string value of current item */ I32 itemsize = 0; /* length (chars) of item, possibly truncated */ I32 itembytes = 0; /* as itemsize, but length in bytes */ I32 fieldsize = 0; /* width of current field */ I32 lines = 0; /* number of lines that have been output */ bool chopspace = (strchr(PL_chopset, ' ') != NULL); /* does $: have space */ const char *chophere = NULL; /* where to chop current item */ STRLEN linemark = 0; /* pos of start of line in output */ NV value; bool gotsome = FALSE; /* seen at least one non-blank item on this line */ STRLEN len; /* length of current sv */ STRLEN linemax; /* estimate of output size in bytes */ bool item_is_utf8 = FALSE; bool targ_is_utf8 = FALSE; const char *fmt; MAGIC *mg = NULL; U8 *source; /* source of bytes to append */ STRLEN to_copy; /* how may bytes to append */ char trans; /* what chars to translate */ mg = doparseform(tmpForm); fpc = (U32*)mg->mg_ptr; /* the actual string the format was compiled from. * with overload etc, this may not match tmpForm */ formsv = mg->mg_obj; SvPV_force(PL_formtarget, len); if (SvTAINTED(tmpForm) || SvTAINTED(formsv)) SvTAINTED_on(PL_formtarget); if (DO_UTF8(PL_formtarget)) targ_is_utf8 = TRUE; linemax = (SvCUR(formsv) * (IN_BYTES ? 1 : 3) + 1); t = SvGROW(PL_formtarget, len + linemax + 1); /* XXX from now onwards, SvCUR(PL_formtarget) is invalid */ t += len; f = SvPV_const(formsv, len); for (;;) { DEBUG_f( { const char *name = "???"; arg = -1; switch (*fpc) { case FF_LITERAL: arg = fpc[1]; name = "LITERAL"; break; case FF_BLANK: arg = fpc[1]; name = "BLANK"; break; case FF_SKIP: arg = fpc[1]; name = "SKIP"; break; case FF_FETCH: arg = fpc[1]; name = "FETCH"; break; case FF_DECIMAL: arg = fpc[1]; name = "DECIMAL"; break; case FF_CHECKNL: name = "CHECKNL"; break; case FF_CHECKCHOP: name = "CHECKCHOP"; break; case FF_SPACE: name = "SPACE"; break; case FF_HALFSPACE: name = "HALFSPACE"; break; case FF_ITEM: name = "ITEM"; break; case FF_CHOP: name = "CHOP"; break; case FF_LINEGLOB: name = "LINEGLOB"; break; case FF_NEWLINE: name = "NEWLINE"; break; case FF_MORE: name = "MORE"; break; case FF_LINEMARK: name = "LINEMARK"; break; case FF_END: name = "END"; break; case FF_0DECIMAL: name = "0DECIMAL"; break; case FF_LINESNGL: name = "LINESNGL"; break; } if (arg >= 0) PerlIO_printf(Perl_debug_log, "%-16s%ld\n", name, (long) arg); else PerlIO_printf(Perl_debug_log, "%-16s\n", name); } ); switch (*fpc++) { case FF_LINEMARK: /* start (or end) of a line */ linemark = t - SvPVX(PL_formtarget); lines++; gotsome = FALSE; break; case FF_LITERAL: /* append literal chars */ to_copy = *fpc++; source = (U8 *)f; f += to_copy; trans = '~'; item_is_utf8 = targ_is_utf8 ? !!DO_UTF8(formsv) : !!SvUTF8(formsv); goto append; case FF_SKIP: /* skip chars in format */ f += *fpc++; break; case FF_FETCH: /* get next item and set field size to */ arg = *fpc++; f += arg; fieldsize = arg; if (MARK < SP) sv = *++MARK; else { sv = &PL_sv_no; Perl_ck_warner(aTHX_ packWARN(WARN_SYNTAX), "Not enough format arguments"); } if (SvTAINTED(sv)) SvTAINTED_on(PL_formtarget); break; case FF_CHECKNL: /* find max len of item (up to \n) that fits field */ { const char *s = item = SvPV_const(sv, len); const char *send = s + len; itemsize = 0; item_is_utf8 = DO_UTF8(sv); while (s < send) { if (!isCNTRL(*s)) gotsome = TRUE; else if (*s == '\n') break; if (item_is_utf8) s += UTF8SKIP(s); else s++; itemsize++; if (itemsize == fieldsize) break; } itembytes = s - item; chophere = s; break; } case FF_CHECKCHOP: /* like CHECKNL, but up to highest split point */ { const char *s = item = SvPV_const(sv, len); const char *send = s + len; I32 size = 0; chophere = NULL; item_is_utf8 = DO_UTF8(sv); while (s < send) { /* look for a legal split position */ if (isSPACE(*s)) { if (*s == '\r') { chophere = s; itemsize = size; break; } if (chopspace) { /* provisional split point */ chophere = s; itemsize = size; } /* we delay testing fieldsize until after we've * processed the possible split char directly * following the last field char; so if fieldsize=3 * and item="a b cdef", we consume "a b", not "a". * Ditto further down. */ if (size == fieldsize) break; } else { if (strchr(PL_chopset, *s)) { /* provisional split point */ /* for a non-space split char, we include * the split char; hence the '+1' */ chophere = s + 1; itemsize = size; } if (size == fieldsize) break; if (!isCNTRL(*s)) gotsome = TRUE; } if (item_is_utf8) s += UTF8SKIP(s); else s++; size++; } if (!chophere || s == send) { chophere = s; itemsize = size; } itembytes = chophere - item; break; } case FF_SPACE: /* append padding space (diff of field, item size) */ arg = fieldsize - itemsize; if (arg) { fieldsize -= arg; while (arg-- > 0) *t++ = ' '; } break; case FF_HALFSPACE: /* like FF_SPACE, but only append half as many */ arg = fieldsize - itemsize; if (arg) { arg /= 2; fieldsize -= arg; while (arg-- > 0) *t++ = ' '; } break; case FF_ITEM: /* append a text item, while blanking ctrl chars */ to_copy = itembytes; source = (U8 *)item; trans = 1; goto append; case FF_CHOP: /* (for ^*) chop the current item */ if (sv != &PL_sv_no) { const char *s = chophere; if (chopspace) { while (isSPACE(*s)) s++; } if (SvPOKp(sv)) sv_chop(sv,s); else /* tied, overloaded or similar strangeness. * Do it the hard way */ sv_setpvn(sv, s, len - (s-item)); SvSETMAGIC(sv); break; } case FF_LINESNGL: /* process ^* */ chopspace = 0; /* FALLTHROUGH */ case FF_LINEGLOB: /* process @* */ { const bool oneline = fpc[-1] == FF_LINESNGL; const char *s = item = SvPV_const(sv, len); const char *const send = s + len; item_is_utf8 = DO_UTF8(sv); chophere = s + len; if (!len) break; trans = 0; gotsome = TRUE; source = (U8 *) s; to_copy = len; while (s < send) { if (*s++ == '\n') { if (oneline) { to_copy = s - item - 1; chophere = s; break; } else { if (s == send) { to_copy--; } else lines++; } } } } append: /* append to_copy bytes from source to PL_formstring. * item_is_utf8 implies source is utf8. * if trans, translate certain characters during the copy */ { U8 *tmp = NULL; STRLEN grow = 0; SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget)); if (targ_is_utf8 && !item_is_utf8) { source = tmp = bytes_to_utf8(source, &to_copy); } else { if (item_is_utf8 && !targ_is_utf8) { U8 *s; /* Upgrade targ to UTF8, and then we reduce it to a problem we have a simple solution for. Don't need get magic. */ sv_utf8_upgrade_nomg(PL_formtarget); targ_is_utf8 = TRUE; /* re-calculate linemark */ s = (U8*)SvPVX(PL_formtarget); /* the bytes we initially allocated to append the * whole line may have been gobbled up during the * upgrade, so allocate a whole new line's worth * for safety */ grow = linemax; while (linemark--) s += UTF8SKIP(s); linemark = s - (U8*)SvPVX(PL_formtarget); } /* Easy. They agree. */ assert (item_is_utf8 == targ_is_utf8); } if (!trans) /* @* and ^* are the only things that can exceed * the linemax, so grow by the output size, plus * a whole new form's worth in case of any further * output */ grow = linemax + to_copy; if (grow) SvGROW(PL_formtarget, SvCUR(PL_formtarget) + grow + 1); t = SvPVX(PL_formtarget) + SvCUR(PL_formtarget); Copy(source, t, to_copy, char); if (trans) { /* blank out ~ or control chars, depending on trans. * works on bytes not chars, so relies on not * matching utf8 continuation bytes */ U8 *s = (U8*)t; U8 *send = s + to_copy; while (s < send) { const int ch = *s; if (trans == '~' ? (ch == '~') : isCNTRL(ch)) *s = ' '; s++; } } t += to_copy; SvCUR_set(PL_formtarget, SvCUR(PL_formtarget) + to_copy); if (tmp) Safefree(tmp); break; } case FF_0DECIMAL: /* like FF_DECIMAL but for 0### */ arg = *fpc++; fmt = (const char *) ((arg & FORM_NUM_POINT) ? "%#0*.*" NVff : "%0*.*" NVff); goto ff_dec; case FF_DECIMAL: /* do @##, ^##, where =(precision|flags) */ arg = *fpc++; fmt = (const char *) ((arg & FORM_NUM_POINT) ? "%#*.*" NVff : "%*.*" NVff); ff_dec: /* If the field is marked with ^ and the value is undefined, blank it out. */ if ((arg & FORM_NUM_BLANK) && !SvOK(sv)) { arg = fieldsize; while (arg--) *t++ = ' '; break; } gotsome = TRUE; value = SvNV(sv); /* overflow evidence */ if (num_overflow(value, fieldsize, arg)) { arg = fieldsize; while (arg--) *t++ = '#'; break; } /* Formats aren't yet marked for locales, so assume "yes". */ { Size_t max = SvLEN(PL_formtarget) - (t - SvPVX(PL_formtarget)); int len; DECLARATION_FOR_LC_NUMERIC_MANIPULATION; STORE_LC_NUMERIC_SET_TO_NEEDED(); arg &= ~(FORM_NUM_POINT|FORM_NUM_BLANK); #ifdef USE_QUADMATH { const char* qfmt = quadmath_format_single(fmt); int len; if (!qfmt) Perl_croak_nocontext("panic: quadmath invalid format \"%s\"", fmt); len = quadmath_snprintf(t, max, qfmt, (int) fieldsize, (int) arg, value); if (len == -1) Perl_croak_nocontext("panic: quadmath_snprintf failed, format \"%s\"", qfmt); if (qfmt != fmt) Safefree(fmt); } #else /* we generate fmt ourselves so it is safe */ GCC_DIAG_IGNORE(-Wformat-nonliteral); len = my_snprintf(t, max, fmt, (int) fieldsize, (int) arg, value); GCC_DIAG_RESTORE; #endif PERL_MY_SNPRINTF_POST_GUARD(len, max); RESTORE_LC_NUMERIC(); } t += fieldsize; break; case FF_NEWLINE: /* delete trailing spaces, then append \n */ f++; while (t-- > (SvPVX(PL_formtarget) + linemark) && *t == ' ') ; t++; *t++ = '\n'; break; case FF_BLANK: /* for arg==0: do '~'; for arg>0 : do '~~' */ arg = *fpc++; if (gotsome) { if (arg) { /* repeat until fields exhausted? */ fpc--; goto end; } } else { t = SvPVX(PL_formtarget) + linemark; lines--; } break; case FF_MORE: /* replace long end of string with '...' */ { const char *s = chophere; const char *send = item + len; if (chopspace) { while (isSPACE(*s) && (s < send)) s++; } if (s < send) { char *s1; arg = fieldsize - itemsize; if (arg) { fieldsize -= arg; while (arg-- > 0) *t++ = ' '; } s1 = t - 3; if (strnEQ(s1," ",3)) { while (s1 > SvPVX_const(PL_formtarget) && isSPACE(s1[-1])) s1--; } *s1++ = '.'; *s1++ = '.'; *s1++ = '.'; } break; } case FF_END: /* tidy up, then return */ end: assert(t < SvPVX_const(PL_formtarget) + SvLEN(PL_formtarget)); *t = '\0'; SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget)); if (targ_is_utf8) SvUTF8_on(PL_formtarget); FmLINES(PL_formtarget) += lines; SP = ORIGMARK; if (fpc[-1] == FF_BLANK) RETURNOP(cLISTOP->op_first); else RETPUSHYES; } } } PP(pp_grepstart) { dSP; SV *src; if (PL_stack_base + *PL_markstack_ptr == SP) { (void)POPMARK; if (GIMME_V == G_SCALAR) mXPUSHi(0); RETURNOP(PL_op->op_next->op_next); } PL_stack_sp = PL_stack_base + *PL_markstack_ptr + 1; Perl_pp_pushmark(aTHX); /* push dst */ Perl_pp_pushmark(aTHX); /* push src */ ENTER_with_name("grep"); /* enter outer scope */ SAVETMPS; SAVE_DEFSV; ENTER_with_name("grep_item"); /* enter inner scope */ SAVEVPTR(PL_curpm); src = PL_stack_base[*PL_markstack_ptr]; if (SvPADTMP(src)) { src = PL_stack_base[*PL_markstack_ptr] = sv_mortalcopy(src); PL_tmps_floor++; } SvTEMP_off(src); DEFSV_set(src); PUTBACK; if (PL_op->op_type == OP_MAPSTART) Perl_pp_pushmark(aTHX); /* push top */ return ((LOGOP*)PL_op->op_next)->op_other; } PP(pp_mapwhile) { dSP; const I32 gimme = GIMME_V; I32 items = (SP - PL_stack_base) - *PL_markstack_ptr; /* how many new items */ I32 count; I32 shift; SV** src; SV** dst; /* first, move source pointer to the next item in the source list */ ++PL_markstack_ptr[-1]; /* if there are new items, push them into the destination list */ if (items && gimme != G_VOID) { /* might need to make room back there first */ if (items > PL_markstack_ptr[-1] - PL_markstack_ptr[-2]) { /* XXX this implementation is very pessimal because the stack * is repeatedly extended for every set of items. Is possible * to do this without any stack extension or copying at all * by maintaining a separate list over which the map iterates * (like foreach does). --gsar */ /* everything in the stack after the destination list moves * towards the end the stack by the amount of room needed */ shift = items - (PL_markstack_ptr[-1] - PL_markstack_ptr[-2]); /* items to shift up (accounting for the moved source pointer) */ count = (SP - PL_stack_base) - (PL_markstack_ptr[-1] - 1); /* This optimization is by Ben Tilly and it does * things differently from what Sarathy (gsar) * is describing. The downside of this optimization is * that leaves "holes" (uninitialized and hopefully unused areas) * to the Perl stack, but on the other hand this * shouldn't be a problem. If Sarathy's idea gets * implemented, this optimization should become * irrelevant. --jhi */ if (shift < count) shift = count; /* Avoid shifting too often --Ben Tilly */ EXTEND(SP,shift); src = SP; dst = (SP += shift); PL_markstack_ptr[-1] += shift; *PL_markstack_ptr += shift; while (count--) *dst-- = *src--; } /* copy the new items down to the destination list */ dst = PL_stack_base + (PL_markstack_ptr[-2] += items) - 1; if (gimme == G_ARRAY) { /* add returned items to the collection (making mortal copies * if necessary), then clear the current temps stack frame * *except* for those items. We do this splicing the items * into the start of the tmps frame (so some items may be on * the tmps stack twice), then moving PL_tmps_floor above * them, then freeing the frame. That way, the only tmps that * accumulate over iterations are the return values for map. * We have to do to this way so that everything gets correctly * freed if we die during the map. */ I32 tmpsbase; I32 i = items; /* make space for the slice */ EXTEND_MORTAL(items); tmpsbase = PL_tmps_floor + 1; Move(PL_tmps_stack + tmpsbase, PL_tmps_stack + tmpsbase + items, PL_tmps_ix - PL_tmps_floor, SV*); PL_tmps_ix += items; while (i-- > 0) { SV *sv = POPs; if (!SvTEMP(sv)) sv = sv_mortalcopy(sv); *dst-- = sv; PL_tmps_stack[tmpsbase++] = SvREFCNT_inc_simple(sv); } /* clear the stack frame except for the items */ PL_tmps_floor += items; FREETMPS; /* FREETMPS may have cleared the TEMP flag on some of the items */ i = items; while (i-- > 0) SvTEMP_on(PL_tmps_stack[--tmpsbase]); } else { /* scalar context: we don't care about which values map returns * (we use undef here). And so we certainly don't want to do mortal * copies of meaningless values. */ while (items-- > 0) { (void)POPs; *dst-- = &PL_sv_undef; } FREETMPS; } } else { FREETMPS; } LEAVE_with_name("grep_item"); /* exit inner scope */ /* All done yet? */ if (PL_markstack_ptr[-1] > *PL_markstack_ptr) { (void)POPMARK; /* pop top */ LEAVE_with_name("grep"); /* exit outer scope */ (void)POPMARK; /* pop src */ items = --*PL_markstack_ptr - PL_markstack_ptr[-1]; (void)POPMARK; /* pop dst */ SP = PL_stack_base + POPMARK; /* pop original mark */ if (gimme == G_SCALAR) { dTARGET; XPUSHi(items); } else if (gimme == G_ARRAY) SP += items; RETURN; } else { SV *src; ENTER_with_name("grep_item"); /* enter inner scope */ SAVEVPTR(PL_curpm); /* set $_ to the new source item */ src = PL_stack_base[PL_markstack_ptr[-1]]; if (SvPADTMP(src)) { src = sv_mortalcopy(src); } SvTEMP_off(src); DEFSV_set(src); RETURNOP(cLOGOP->op_other); } } /* Range stuff. */ PP(pp_range) { if (GIMME_V == G_ARRAY) return NORMAL; if (SvTRUEx(PAD_SV(PL_op->op_targ))) return cLOGOP->op_other; else return NORMAL; } PP(pp_flip) { dSP; if (GIMME_V == G_ARRAY) { RETURNOP(((LOGOP*)cUNOP->op_first)->op_other); } else { dTOPss; SV * const targ = PAD_SV(PL_op->op_targ); int flip = 0; if (PL_op->op_private & OPpFLIP_LINENUM) { if (GvIO(PL_last_in_gv)) { flip = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv)); } else { GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV); if (gv && GvSV(gv)) flip = SvIV(sv) == SvIV(GvSV(gv)); } } else { flip = SvTRUE(sv); } if (flip) { sv_setiv(PAD_SV(cUNOP->op_first->op_targ), 1); if (PL_op->op_flags & OPf_SPECIAL) { sv_setiv(targ, 1); SETs(targ); RETURN; } else { sv_setiv(targ, 0); SP--; RETURNOP(((LOGOP*)cUNOP->op_first)->op_other); } } sv_setpvs(TARG, ""); SETs(targ); RETURN; } } /* This code tries to decide if "$left .. $right" should use the magical string increment, or if the range is numeric (we make an exception for .."0" [#18165]). AMS 20021031. */ #define RANGE_IS_NUMERIC(left,right) ( \ SvNIOKp(left) || (SvOK(left) && !SvPOKp(left)) || \ SvNIOKp(right) || (SvOK(right) && !SvPOKp(right)) || \ (((!SvOK(left) && SvOK(right)) || ((!SvOK(left) || \ looks_like_number(left)) && SvPOKp(left) && *SvPVX_const(left) != '0')) \ && (!SvOK(right) || looks_like_number(right)))) PP(pp_flop) { dSP; if (GIMME_V == G_ARRAY) { dPOPPOPssrl; SvGETMAGIC(left); SvGETMAGIC(right); if (RANGE_IS_NUMERIC(left,right)) { IV i, j, n; if ((SvOK(left) && !SvIOK(left) && SvNV_nomg(left) < IV_MIN) || (SvOK(right) && (SvIOK(right) ? SvIsUV(right) && SvUV(right) > IV_MAX : SvNV_nomg(right) > IV_MAX))) DIE(aTHX_ "Range iterator outside integer range"); i = SvIV_nomg(left); j = SvIV_nomg(right); if (j >= i) { /* Dance carefully around signed max. */ bool overflow = (i <= 0 && j > SSize_t_MAX + i - 1); if (!overflow) { n = j - i + 1; /* The wraparound of signed integers is undefined * behavior, but here we aim for count >=1, and * negative count is just wrong. */ if (n < 1 #if IVSIZE > Size_t_size || n > SSize_t_MAX #endif ) overflow = TRUE; } if (overflow) Perl_croak(aTHX_ "Out of memory during list extend"); EXTEND_MORTAL(n); EXTEND(SP, n); } else n = 0; while (n--) { SV * const sv = sv_2mortal(newSViv(i)); PUSHs(sv); if (n) /* avoid incrementing above IV_MAX */ i++; } } else { STRLEN len, llen; const char * const lpv = SvPV_nomg_const(left, llen); const char * const tmps = SvPV_nomg_const(right, len); SV *sv = newSVpvn_flags(lpv, llen, SvUTF8(left)|SVs_TEMP); while (!SvNIOKp(sv) && SvCUR(sv) <= len) { XPUSHs(sv); if (strEQ(SvPVX_const(sv),tmps)) break; sv = sv_2mortal(newSVsv(sv)); sv_inc(sv); } } } else { dTOPss; SV * const targ = PAD_SV(cUNOP->op_first->op_targ); int flop = 0; sv_inc(targ); if (PL_op->op_private & OPpFLIP_LINENUM) { if (GvIO(PL_last_in_gv)) { flop = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv)); } else { GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV); if (gv && GvSV(gv)) flop = SvIV(sv) == SvIV(GvSV(gv)); } } else { flop = SvTRUE(sv); } if (flop) { sv_setiv(PAD_SV(((UNOP*)cUNOP->op_first)->op_first->op_targ), 0); sv_catpvs(targ, "E0"); } SETs(targ); } RETURN; } /* Control. */ static const char * const context_name[] = { "pseudo-block", NULL, /* CXt_WHEN never actually needs "block" */ NULL, /* CXt_BLOCK never actually needs "block" */ NULL, /* CXt_GIVEN never actually needs "block" */ NULL, /* CXt_LOOP_FOR never actually needs "loop" */ NULL, /* CXt_LOOP_PLAIN never actually needs "loop" */ NULL, /* CXt_LOOP_LAZYSV never actually needs "loop" */ NULL, /* CXt_LOOP_LAZYIV never actually needs "loop" */ "subroutine", "format", "eval", "substitution", }; STATIC I32 S_dopoptolabel(pTHX_ const char *label, STRLEN len, U32 flags) { I32 i; PERL_ARGS_ASSERT_DOPOPTOLABEL; for (i = cxstack_ix; i >= 0; i--) { const PERL_CONTEXT * const cx = &cxstack[i]; switch (CxTYPE(cx)) { case CXt_SUBST: case CXt_SUB: case CXt_FORMAT: case CXt_EVAL: case CXt_NULL: /* diag_listed_as: Exiting subroutine via %s */ Perl_ck_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s", context_name[CxTYPE(cx)], OP_NAME(PL_op)); if (CxTYPE(cx) == CXt_NULL) return -1; break; case CXt_LOOP_LAZYIV: case CXt_LOOP_LAZYSV: case CXt_LOOP_FOR: case CXt_LOOP_PLAIN: { STRLEN cx_label_len = 0; U32 cx_label_flags = 0; const char *cx_label = CxLABEL_len_flags(cx, &cx_label_len, &cx_label_flags); if (!cx_label || !( ( (cx_label_flags & SVf_UTF8) != (flags & SVf_UTF8) ) ? (flags & SVf_UTF8) ? (bytes_cmp_utf8( (const U8*)cx_label, cx_label_len, (const U8*)label, len) == 0) : (bytes_cmp_utf8( (const U8*)label, len, (const U8*)cx_label, cx_label_len) == 0) : (len == cx_label_len && ((cx_label == label) || memEQ(cx_label, label, len))) )) { DEBUG_l(Perl_deb(aTHX_ "(poptolabel(): skipping label at cx=%ld %s)\n", (long)i, cx_label)); continue; } DEBUG_l( Perl_deb(aTHX_ "(poptolabel(): found label at cx=%ld %s)\n", (long)i, label)); return i; } } } return i; } I32 Perl_dowantarray(pTHX) { const I32 gimme = block_gimme(); return (gimme == G_VOID) ? G_SCALAR : gimme; } I32 Perl_block_gimme(pTHX) { const I32 cxix = dopoptosub(cxstack_ix); U8 gimme; if (cxix < 0) return G_VOID; gimme = (cxstack[cxix].blk_gimme & G_WANT); if (!gimme) Perl_croak(aTHX_ "panic: bad gimme: %d\n", gimme); return gimme; } I32 Perl_is_lvalue_sub(pTHX) { const I32 cxix = dopoptosub(cxstack_ix); assert(cxix >= 0); /* We should only be called from inside subs */ if (CxLVAL(cxstack + cxix) && CvLVALUE(cxstack[cxix].blk_sub.cv)) return CxLVAL(cxstack + cxix); else return 0; } /* only used by PUSHSUB */ I32 Perl_was_lvalue_sub(pTHX) { const I32 cxix = dopoptosub(cxstack_ix-1); assert(cxix >= 0); /* We should only be called from inside subs */ if (CxLVAL(cxstack + cxix) && CvLVALUE(cxstack[cxix].blk_sub.cv)) return CxLVAL(cxstack + cxix); else return 0; } STATIC I32 S_dopoptosub_at(pTHX_ const PERL_CONTEXT *cxstk, I32 startingblock) { I32 i; PERL_ARGS_ASSERT_DOPOPTOSUB_AT; #ifndef DEBUGGING PERL_UNUSED_CONTEXT; #endif for (i = startingblock; i >= 0; i--) { const PERL_CONTEXT * const cx = &cxstk[i]; switch (CxTYPE(cx)) { default: continue; case CXt_SUB: /* in sub foo { /(?{...})/ }, foo ends up on the CX stack * twice; the first for the normal foo() call, and the second * for a faked up re-entry into the sub to execute the * code block. Hide this faked entry from the world. */ if (cx->cx_type & CXp_SUB_RE_FAKE) continue; /* FALLTHROUGH */ case CXt_EVAL: case CXt_FORMAT: DEBUG_l( Perl_deb(aTHX_ "(dopoptosub_at(): found sub at cx=%ld)\n", (long)i)); return i; } } return i; } STATIC I32 S_dopoptoeval(pTHX_ I32 startingblock) { I32 i; for (i = startingblock; i >= 0; i--) { const PERL_CONTEXT *cx = &cxstack[i]; switch (CxTYPE(cx)) { default: continue; case CXt_EVAL: DEBUG_l( Perl_deb(aTHX_ "(dopoptoeval(): found eval at cx=%ld)\n", (long)i)); return i; } } return i; } STATIC I32 S_dopoptoloop(pTHX_ I32 startingblock) { I32 i; for (i = startingblock; i >= 0; i--) { const PERL_CONTEXT * const cx = &cxstack[i]; switch (CxTYPE(cx)) { case CXt_SUBST: case CXt_SUB: case CXt_FORMAT: case CXt_EVAL: case CXt_NULL: /* diag_listed_as: Exiting subroutine via %s */ Perl_ck_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s", context_name[CxTYPE(cx)], OP_NAME(PL_op)); if ((CxTYPE(cx)) == CXt_NULL) return -1; break; case CXt_LOOP_LAZYIV: case CXt_LOOP_LAZYSV: case CXt_LOOP_FOR: case CXt_LOOP_PLAIN: DEBUG_l( Perl_deb(aTHX_ "(dopoptoloop(): found loop at cx=%ld)\n", (long)i)); return i; } } return i; } STATIC I32 S_dopoptogiven(pTHX_ I32 startingblock) { I32 i; for (i = startingblock; i >= 0; i--) { const PERL_CONTEXT *cx = &cxstack[i]; switch (CxTYPE(cx)) { default: continue; case CXt_GIVEN: DEBUG_l( Perl_deb(aTHX_ "(dopoptogiven(): found given at cx=%ld)\n", (long)i)); return i; case CXt_LOOP_PLAIN: assert(!CxFOREACHDEF(cx)); break; case CXt_LOOP_LAZYIV: case CXt_LOOP_LAZYSV: case CXt_LOOP_FOR: if (CxFOREACHDEF(cx)) { DEBUG_l( Perl_deb(aTHX_ "(dopoptogiven(): found foreach at cx=%ld)\n", (long)i)); return i; } } } return i; } STATIC I32 S_dopoptowhen(pTHX_ I32 startingblock) { I32 i; for (i = startingblock; i >= 0; i--) { const PERL_CONTEXT *cx = &cxstack[i]; switch (CxTYPE(cx)) { default: continue; case CXt_WHEN: DEBUG_l( Perl_deb(aTHX_ "(dopoptowhen(): found when at cx=%ld)\n", (long)i)); return i; } } return i; } void Perl_dounwind(pTHX_ I32 cxix) { I32 optype; if (!PL_curstackinfo) /* can happen if die during thread cloning */ return; while (cxstack_ix > cxix) { SV *sv; PERL_CONTEXT *cx = &cxstack[cxstack_ix]; DEBUG_CX("UNWIND"); \ /* Note: we don't need to restore the base context info till the end. */ switch (CxTYPE(cx)) { case CXt_SUBST: POPSUBST(cx); continue; /* not break */ case CXt_SUB: POPSUB(cx,sv); LEAVESUB(sv); break; case CXt_EVAL: POPEVAL(cx); break; case CXt_LOOP_LAZYIV: case CXt_LOOP_LAZYSV: case CXt_LOOP_FOR: case CXt_LOOP_PLAIN: POPLOOP(cx); break; case CXt_NULL: break; case CXt_FORMAT: POPFORMAT(cx); break; } cxstack_ix--; } PERL_UNUSED_VAR(optype); } void Perl_qerror(pTHX_ SV *err) { PERL_ARGS_ASSERT_QERROR; if (PL_in_eval) { if (PL_in_eval & EVAL_KEEPERR) { Perl_ck_warner(aTHX_ packWARN(WARN_MISC), "\t(in cleanup) %"SVf, SVfARG(err)); } else sv_catsv(ERRSV, err); } else if (PL_errors) sv_catsv(PL_errors, err); else Perl_warn(aTHX_ "%"SVf, SVfARG(err)); if (PL_parser) ++PL_parser->error_count; } void Perl_die_unwind(pTHX_ SV *msv) { SV *exceptsv = sv_mortalcopy(msv); U8 in_eval = PL_in_eval; PERL_ARGS_ASSERT_DIE_UNWIND; if (in_eval) { I32 cxix; I32 gimme; /* * Historically, perl used to set ERRSV ($@) early in the die * process and rely on it not getting clobbered during unwinding. * That sucked, because it was liable to get clobbered, so the * setting of ERRSV used to emit the exception from eval{} has * been moved to much later, after unwinding (see just before * JMPENV_JUMP below). However, some modules were relying on the * early setting, by examining $@ during unwinding to use it as * a flag indicating whether the current unwinding was caused by * an exception. It was never a reliable flag for that purpose, * being totally open to false positives even without actual * clobberage, but was useful enough for production code to * semantically rely on it. * * We'd like to have a proper introspective interface that * explicitly describes the reason for whatever unwinding * operations are currently in progress, so that those modules * work reliably and $@ isn't further overloaded. But we don't * have one yet. In its absence, as a stopgap measure, ERRSV is * now *additionally* set here, before unwinding, to serve as the * (unreliable) flag that it used to. * * This behaviour is temporary, and should be removed when a * proper way to detect exceptional unwinding has been developed. * As of 2010-12, the authors of modules relying on the hack * are aware of the issue, because the modules failed on * perls 5.13.{1..7} which had late setting of $@ without this * early-setting hack. */ if (!(in_eval & EVAL_KEEPERR)) { SvTEMP_off(exceptsv); sv_setsv(ERRSV, exceptsv); } if (in_eval & EVAL_KEEPERR) { Perl_ck_warner(aTHX_ packWARN(WARN_MISC), "\t(in cleanup) %"SVf, SVfARG(exceptsv)); } while ((cxix = dopoptoeval(cxstack_ix)) < 0 && PL_curstackinfo->si_prev) { dounwind(-1); POPSTACK; } if (cxix >= 0) { I32 optype; SV *namesv; PERL_CONTEXT *cx; SV **newsp; #ifdef DEBUGGING COP *oldcop; #endif JMPENV *restartjmpenv; OP *restartop; if (cxix < cxstack_ix) dounwind(cxix); POPBLOCK(cx,PL_curpm); if (CxTYPE(cx) != CXt_EVAL) { STRLEN msglen; const char* message = SvPVx_const(exceptsv, msglen); PerlIO_write(Perl_error_log, (const char *)"panic: die ", 11); PerlIO_write(Perl_error_log, message, msglen); my_exit(1); } POPEVAL(cx); namesv = cx->blk_eval.old_namesv; #ifdef DEBUGGING oldcop = cx->blk_oldcop; #endif restartjmpenv = cx->blk_eval.cur_top_env; restartop = cx->blk_eval.retop; if (gimme == G_SCALAR) *++newsp = &PL_sv_undef; PL_stack_sp = newsp; LEAVE; if (optype == OP_REQUIRE) { assert (PL_curcop == oldcop); (void)hv_store(GvHVn(PL_incgv), SvPVX_const(namesv), SvUTF8(namesv) ? -(I32)SvCUR(namesv) : (I32)SvCUR(namesv), &PL_sv_undef, 0); /* note that unlike pp_entereval, pp_require isn't * supposed to trap errors. So now that we've popped the * EVAL that pp_require pushed, and processed the error * message, rethrow the error */ Perl_croak(aTHX_ "%"SVf"Compilation failed in require", SVfARG(exceptsv ? exceptsv : newSVpvs_flags("Unknown error\n", SVs_TEMP))); } if (!(in_eval & EVAL_KEEPERR)) sv_setsv(ERRSV, exceptsv); PL_restartjmpenv = restartjmpenv; PL_restartop = restartop; JMPENV_JUMP(3); NOT_REACHED; /* NOTREACHED */ } } write_to_stderr(exceptsv); my_failure_exit(); NOT_REACHED; /* NOTREACHED */ } PP(pp_xor) { dSP; dPOPTOPssrl; if (SvTRUE(left) != SvTRUE(right)) RETSETYES; else RETSETNO; } /* =head1 CV Manipulation Functions =for apidoc caller_cx The XSUB-writer's equivalent of L. The returned C structure can be interrogated to find all the information returned to Perl by C. Note that XSUBs don't get a stack frame, so C will return information for the immediately-surrounding Perl code. This function skips over the automatic calls to C<&DB::sub> made on the behalf of the debugger. If the stack frame requested was a sub called by C, the return value will be the frame for the call to C, since that has the correct line number/etc. for the call site. If I is non-C, it will be set to a pointer to the frame for the sub call itself. =cut */ const PERL_CONTEXT * Perl_caller_cx(pTHX_ I32 count, const PERL_CONTEXT **dbcxp) { I32 cxix = dopoptosub(cxstack_ix); const PERL_CONTEXT *cx; const PERL_CONTEXT *ccstack = cxstack; const PERL_SI *top_si = PL_curstackinfo; for (;;) { /* we may be in a higher stacklevel, so dig down deeper */ while (cxix < 0 && top_si->si_type != PERLSI_MAIN) { top_si = top_si->si_prev; ccstack = top_si->si_cxstack; cxix = dopoptosub_at(ccstack, top_si->si_cxix); } if (cxix < 0) return NULL; /* caller() should not report the automatic calls to &DB::sub */ if (PL_DBsub && GvCV(PL_DBsub) && cxix >= 0 && ccstack[cxix].blk_sub.cv == GvCV(PL_DBsub)) count++; if (!count--) break; cxix = dopoptosub_at(ccstack, cxix - 1); } cx = &ccstack[cxix]; if (dbcxp) *dbcxp = cx; if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) { const I32 dbcxix = dopoptosub_at(ccstack, cxix - 1); /* We expect that ccstack[dbcxix] is CXt_SUB, anyway, the field below is defined for any cx. */ /* caller() should not report the automatic calls to &DB::sub */ if (PL_DBsub && GvCV(PL_DBsub) && dbcxix >= 0 && ccstack[dbcxix].blk_sub.cv == GvCV(PL_DBsub)) cx = &ccstack[dbcxix]; } return cx; } PP(pp_caller) { dSP; const PERL_CONTEXT *cx; const PERL_CONTEXT *dbcx; I32 gimme = GIMME_V; const HEK *stash_hek; I32 count = 0; bool has_arg = MAXARG && TOPs; const COP *lcop; if (MAXARG) { if (has_arg) count = POPi; else (void)POPs; } cx = caller_cx(count + !!(PL_op->op_private & OPpOFFBYONE), &dbcx); if (!cx) { if (gimme != G_ARRAY) { EXTEND(SP, 1); RETPUSHUNDEF; } RETURN; } DEBUG_CX("CALLER"); assert(CopSTASH(cx->blk_oldcop)); stash_hek = SvTYPE(CopSTASH(cx->blk_oldcop)) == SVt_PVHV ? HvNAME_HEK((HV*)CopSTASH(cx->blk_oldcop)) : NULL; if (gimme != G_ARRAY) { EXTEND(SP, 1); if (!stash_hek) PUSHs(&PL_sv_undef); else { dTARGET; sv_sethek(TARG, stash_hek); PUSHs(TARG); } RETURN; } EXTEND(SP, 11); if (!stash_hek) PUSHs(&PL_sv_undef); else { dTARGET; sv_sethek(TARG, stash_hek); PUSHTARG; } mPUSHs(newSVpv(OutCopFILE(cx->blk_oldcop), 0)); lcop = closest_cop(cx->blk_oldcop, OpSIBLING(cx->blk_oldcop), cx->blk_sub.retop, TRUE); if (!lcop) lcop = cx->blk_oldcop; mPUSHi((I32)CopLINE(lcop)); if (!has_arg) RETURN; if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) { /* So is ccstack[dbcxix]. */ if (CvHASGV(dbcx->blk_sub.cv)) { PUSHs(cv_name(dbcx->blk_sub.cv, 0, 0)); PUSHs(boolSV(CxHASARGS(cx))); } else { PUSHs(newSVpvs_flags("(unknown)", SVs_TEMP)); PUSHs(boolSV(CxHASARGS(cx))); } } else { PUSHs(newSVpvs_flags("(eval)", SVs_TEMP)); mPUSHi(0); } gimme = (I32)cx->blk_gimme; if (gimme == G_VOID) PUSHs(&PL_sv_undef); else PUSHs(boolSV((gimme & G_WANT) == G_ARRAY)); if (CxTYPE(cx) == CXt_EVAL) { /* eval STRING */ if (CxOLD_OP_TYPE(cx) == OP_ENTEREVAL) { SV *cur_text = cx->blk_eval.cur_text; if (SvCUR(cur_text) >= 2) { PUSHs(newSVpvn_flags(SvPVX(cur_text), SvCUR(cur_text)-2, SvUTF8(cur_text)|SVs_TEMP)); } else { /* I think this is will always be "", but be sure */ PUSHs(sv_2mortal(newSVsv(cur_text))); } PUSHs(&PL_sv_no); } /* require */ else if (cx->blk_eval.old_namesv) { mPUSHs(newSVsv(cx->blk_eval.old_namesv)); PUSHs(&PL_sv_yes); } /* eval BLOCK (try blocks have old_namesv == 0) */ else { PUSHs(&PL_sv_undef); PUSHs(&PL_sv_undef); } } else { PUSHs(&PL_sv_undef); PUSHs(&PL_sv_undef); } if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx) && CopSTASH_eq(PL_curcop, PL_debstash)) { AV * const ary = cx->blk_sub.argarray; const SSize_t off = AvARRAY(ary) - AvALLOC(ary); Perl_init_dbargs(aTHX); if (AvMAX(PL_dbargs) < AvFILLp(ary) + off) av_extend(PL_dbargs, AvFILLp(ary) + off); Copy(AvALLOC(ary), AvARRAY(PL_dbargs), AvFILLp(ary) + 1 + off, SV*); AvFILLp(PL_dbargs) = AvFILLp(ary) + off; } mPUSHi(CopHINTS_get(cx->blk_oldcop)); { SV * mask ; STRLEN * const old_warnings = cx->blk_oldcop->cop_warnings ; if (old_warnings == pWARN_NONE) mask = newSVpvn(WARN_NONEstring, WARNsize) ; else if (old_warnings == pWARN_STD && (PL_dowarn & G_WARN_ON) == 0) mask = &PL_sv_undef ; else if (old_warnings == pWARN_ALL || (old_warnings == pWARN_STD && PL_dowarn & G_WARN_ON)) { /* Get the bit mask for $warnings::Bits{all}, because * it could have been extended by warnings::register */ SV **bits_all; HV * const bits = get_hv("warnings::Bits", 0); if (bits && (bits_all=hv_fetchs(bits, "all", FALSE))) { mask = newSVsv(*bits_all); } else { mask = newSVpvn(WARN_ALLstring, WARNsize) ; } } else mask = newSVpvn((char *) (old_warnings + 1), old_warnings[0]); mPUSHs(mask); } PUSHs(cx->blk_oldcop->cop_hints_hash ? sv_2mortal(newRV_noinc(MUTABLE_SV(cop_hints_2hv(cx->blk_oldcop, 0)))) : &PL_sv_undef); RETURN; } PP(pp_reset) { dSP; const char * tmps; STRLEN len = 0; if (MAXARG < 1 || (!TOPs && !POPs)) tmps = NULL, len = 0; else tmps = SvPVx_const(POPs, len); sv_resetpvn(tmps, len, CopSTASH(PL_curcop)); PUSHs(&PL_sv_yes); RETURN; } /* like pp_nextstate, but used instead when the debugger is active */ PP(pp_dbstate) { PL_curcop = (COP*)PL_op; TAINT_NOT; /* Each statement is presumed innocent */ PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp; FREETMPS; PERL_ASYNC_CHECK(); if (PL_op->op_flags & OPf_SPECIAL /* breakpoint */ || PL_DBsingle_iv || PL_DBsignal_iv || PL_DBtrace_iv) { dSP; PERL_CONTEXT *cx; const I32 gimme = G_ARRAY; U8 hasargs; GV * const gv = PL_DBgv; CV * cv = NULL; if (gv && isGV_with_GP(gv)) cv = GvCV(gv); if (!cv || (!CvROOT(cv) && !CvXSUB(cv))) DIE(aTHX_ "No DB::DB routine defined"); if (CvDEPTH(cv) >= 1 && !(PL_debug & DEBUG_DB_RECURSE_FLAG)) /* don't do recursive DB::DB call */ return NORMAL; ENTER; SAVETMPS; SAVEI32(PL_debug); SAVESTACK_POS(); PL_debug = 0; hasargs = 0; SPAGAIN; if (CvISXSUB(cv)) { PUSHMARK(SP); (void)(*CvXSUB(cv))(aTHX_ cv); FREETMPS; LEAVE; return NORMAL; } else { PUSHBLOCK(cx, CXt_SUB, SP); PUSHSUB_DB(cx); cx->blk_sub.retop = PL_op->op_next; CvDEPTH(cv)++; if (CvDEPTH(cv) >= 2) { PERL_STACK_OVERFLOW_CHECK(); pad_push(CvPADLIST(cv), CvDEPTH(cv)); } SAVECOMPPAD(); PAD_SET_CUR_NOSAVE(CvPADLIST(cv), CvDEPTH(cv)); RETURNOP(CvSTART(cv)); } } else return NORMAL; } /* S_leave_common: Common code that many functions in this file use on scope exit. */ /* SVs on the stack that have any of the flags passed in are left as is. Other SVs are protected via the mortals stack if lvalue is true, and copied otherwise. Also, taintedness is cleared. */ STATIC SV ** S_leave_common(pTHX_ SV **newsp, SV **sp, SV **mark, I32 gimme, U32 flags, bool lvalue) { bool padtmp = 0; PERL_ARGS_ASSERT_LEAVE_COMMON; TAINT_NOT; if (flags & SVs_PADTMP) { flags &= ~SVs_PADTMP; padtmp = 1; } if (gimme == G_SCALAR) { if (MARK < SP) *++newsp = ((SvFLAGS(*SP) & flags) || (padtmp && SvPADTMP(*SP))) ? *SP : lvalue ? sv_2mortal(SvREFCNT_inc_simple_NN(*SP)) : sv_mortalcopy(*SP); else { /* MEXTEND() only updates MARK, so reuse it instead of newsp. */ MARK = newsp; MEXTEND(MARK, 1); *++MARK = &PL_sv_undef; return MARK; } } else if (gimme == G_ARRAY) { /* in case LEAVE wipes old return values */ while (++MARK <= SP) { if ((SvFLAGS(*MARK) & flags) || (padtmp && SvPADTMP(*MARK))) *++newsp = *MARK; else { *++newsp = lvalue ? sv_2mortal(SvREFCNT_inc_simple_NN(*MARK)) : sv_mortalcopy(*MARK); TAINT_NOT; /* Each item is independent */ } } /* When this function was called with MARK == newsp, we reach this * point with SP == newsp. */ } return newsp; } PP(pp_enter) { dSP; PERL_CONTEXT *cx; I32 gimme = GIMME_V; ENTER_with_name("block"); SAVETMPS; PUSHBLOCK(cx, CXt_BLOCK, SP); RETURN; } PP(pp_leave) { dSP; PERL_CONTEXT *cx; SV **newsp; PMOP *newpm; I32 gimme; if (PL_op->op_flags & OPf_SPECIAL) { cx = &cxstack[cxstack_ix]; cx->blk_oldpm = PL_curpm; /* fake block should preserve $1 et al */ } POPBLOCK(cx,newpm); gimme = OP_GIMME(PL_op, (cxstack_ix >= 0) ? gimme : G_SCALAR); SP = leave_common(newsp, SP, newsp, gimme, SVs_PADTMP|SVs_TEMP, PL_op->op_private & OPpLVALUE); PL_curpm = newpm; /* Don't pop $1 et al till now */ LEAVE_with_name("block"); RETURN; } static bool S_outside_integer(pTHX_ SV *sv) { if (SvOK(sv)) { const NV nv = SvNV_nomg(sv); if (Perl_isinfnan(nv)) return TRUE; #ifdef NV_PRESERVES_UV if (nv < (NV)IV_MIN || nv > (NV)IV_MAX) return TRUE; #else if (nv <= (NV)IV_MIN) return TRUE; if ((nv > 0) && ((nv > (NV)UV_MAX || SvUV_nomg(sv) > (UV)IV_MAX))) return TRUE; #endif } return FALSE; } PP(pp_enteriter) { dSP; dMARK; PERL_CONTEXT *cx; const I32 gimme = GIMME_V; void *itervar; /* location of the iteration variable */ U8 cxtype = CXt_LOOP_FOR; ENTER_with_name("loop1"); SAVETMPS; if (PL_op->op_targ) { /* "my" variable */ if (PL_op->op_private & OPpLVAL_INTRO) { /* for my $x (...) */ SvPADSTALE_off(PAD_SVl(PL_op->op_targ)); SAVESETSVFLAGS(PAD_SVl(PL_op->op_targ), SVs_PADSTALE, SVs_PADSTALE); } SAVEPADSVANDMORTALIZE(PL_op->op_targ); #ifdef USE_ITHREADS itervar = PL_comppad; #else itervar = &PAD_SVl(PL_op->op_targ); #endif } else if (LIKELY(isGV(TOPs))) { /* symbol table variable */ GV * const gv = MUTABLE_GV(POPs); SV** svp = &GvSV(gv); save_pushptrptr(gv, SvREFCNT_inc(*svp), SAVEt_GVSV); *svp = newSV(0); itervar = (void *)gv; } else { SV * const sv = POPs; assert(SvTYPE(sv) == SVt_PVMG); assert(SvMAGIC(sv)); assert(SvMAGIC(sv)->mg_type == PERL_MAGIC_lvref); itervar = (void *)sv; cxtype |= CXp_FOR_LVREF; } if (PL_op->op_private & OPpITER_DEF) cxtype |= CXp_FOR_DEF; ENTER_with_name("loop2"); PUSHBLOCK(cx, cxtype, SP); PUSHLOOP_FOR(cx, itervar, MARK); if (PL_op->op_flags & OPf_STACKED) { SV *maybe_ary = POPs; if (SvTYPE(maybe_ary) != SVt_PVAV) { dPOPss; SV * const right = maybe_ary; if (UNLIKELY(cxtype & CXp_FOR_LVREF)) DIE(aTHX_ "Assigned value is not a reference"); SvGETMAGIC(sv); SvGETMAGIC(right); if (RANGE_IS_NUMERIC(sv,right)) { cx->cx_type &= ~CXTYPEMASK; cx->cx_type |= CXt_LOOP_LAZYIV; /* Make sure that no-one re-orders cop.h and breaks our assumptions */ assert(CxTYPE(cx) == CXt_LOOP_LAZYIV); if (S_outside_integer(aTHX_ sv) || S_outside_integer(aTHX_ right)) DIE(aTHX_ "Range iterator outside integer range"); cx->blk_loop.state_u.lazyiv.cur = SvIV_nomg(sv); cx->blk_loop.state_u.lazyiv.end = SvIV_nomg(right); #ifdef DEBUGGING /* for correct -Dstv display */ cx->blk_oldsp = sp - PL_stack_base; #endif } else { cx->cx_type &= ~CXTYPEMASK; cx->cx_type |= CXt_LOOP_LAZYSV; /* Make sure that no-one re-orders cop.h and breaks our assumptions */ assert(CxTYPE(cx) == CXt_LOOP_LAZYSV); cx->blk_loop.state_u.lazysv.cur = newSVsv(sv); cx->blk_loop.state_u.lazysv.end = right; SvREFCNT_inc(right); (void) SvPV_force_nolen(cx->blk_loop.state_u.lazysv.cur); /* This will do the upgrade to SVt_PV, and warn if the value is uninitialised. */ (void) SvPV_nolen_const(right); /* Doing this avoids a check every time in pp_iter in pp_hot.c to replace !SvOK() with a pointer to "". */ if (!SvOK(right)) { SvREFCNT_dec(right); cx->blk_loop.state_u.lazysv.end = &PL_sv_no; } } } else /* SvTYPE(maybe_ary) == SVt_PVAV */ { cx->blk_loop.state_u.ary.ary = MUTABLE_AV(maybe_ary); SvREFCNT_inc(maybe_ary); cx->blk_loop.state_u.ary.ix = (PL_op->op_private & OPpITER_REVERSED) ? AvFILL(cx->blk_loop.state_u.ary.ary) + 1 : -1; } } else { /* iterating over items on the stack */ cx->blk_loop.state_u.ary.ary = NULL; /* means to use the stack */ if (PL_op->op_private & OPpITER_REVERSED) { cx->blk_loop.state_u.ary.ix = cx->blk_oldsp + 1; } else { cx->blk_loop.state_u.ary.ix = MARK - PL_stack_base; } } RETURN; } PP(pp_enterloop) { dSP; PERL_CONTEXT *cx; const I32 gimme = GIMME_V; ENTER_with_name("loop1"); SAVETMPS; ENTER_with_name("loop2"); PUSHBLOCK(cx, CXt_LOOP_PLAIN, SP); PUSHLOOP_PLAIN(cx, SP); RETURN; } PP(pp_leaveloop) { dSP; PERL_CONTEXT *cx; I32 gimme; SV **newsp; PMOP *newpm; SV **mark; POPBLOCK(cx,newpm); assert(CxTYPE_is_LOOP(cx)); mark = newsp; newsp = PL_stack_base + cx->blk_loop.resetsp; SP = leave_common(newsp, SP, MARK, gimme, 0, PL_op->op_private & OPpLVALUE); PUTBACK; POPLOOP(cx); /* Stack values are safe: release loop vars ... */ PL_curpm = newpm; /* ... and pop $1 et al */ LEAVE_with_name("loop2"); LEAVE_with_name("loop1"); return NORMAL; } /* This duplicates most of pp_leavesub, but with additional code to handle * return args in lvalue context. It was forked from pp_leavesub to * avoid slowing down that function any further. * * Any changes made to this function may need to be copied to pp_leavesub * and vice-versa. */ PP(pp_leavesublv) { dSP; SV **newsp; SV **mark; PMOP *newpm; I32 gimme; PERL_CONTEXT *cx; SV *sv; bool ref; const char *what = NULL; if (CxMULTICALL(&cxstack[cxstack_ix])) { /* entry zero of a stack is always PL_sv_undef, which * simplifies converting a '()' return into undef in scalar context */ assert(PL_stack_sp > PL_stack_base || *PL_stack_base == &PL_sv_undef); return 0; } POPBLOCK(cx,newpm); cxstack_ix++; /* preserve cx entry on stack for use by POPSUB */ TAINT_NOT; mark = newsp + 1; ref = !!(CxLVAL(cx) & OPpENTERSUB_INARGS); if (gimme == G_SCALAR) { if (CxLVAL(cx) && !ref) { /* Leave it as it is if we can. */ SV *sv; if (MARK <= SP) { assert(MARK == SP); if ((SvPADTMP(TOPs) || SvREADONLY(TOPs)) && !SvSMAGICAL(TOPs)) { what = SvREADONLY(TOPs) ? (TOPs == &PL_sv_undef) ? "undef" : "a readonly value" : "a temporary"; } else goto copy_sv; } else { /* sub:lvalue{} will take us here. */ what = "undef"; } croak: LEAVE; POPSUB(cx,sv); cxstack_ix--; PL_curpm = newpm; LEAVESUB(sv); Perl_croak(aTHX_ "Can't return %s from lvalue subroutine", what ); } if (MARK <= SP) { copy_sv: if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) { if (!SvPADTMP(*SP)) { *MARK = SvREFCNT_inc(*SP); FREETMPS; sv_2mortal(*MARK); } else { /* FREETMPS could clobber it */ SV *sv = SvREFCNT_inc(*SP); FREETMPS; *MARK = sv_mortalcopy(sv); SvREFCNT_dec(sv); } } else *MARK = SvPADTMP(*SP) ? sv_mortalcopy(*SP) : !SvTEMP(*SP) ? sv_2mortal(SvREFCNT_inc_simple_NN(*SP)) : *SP; } else { MEXTEND(MARK, 0); *MARK = &PL_sv_undef; } SP = MARK; if (CxLVAL(cx) & OPpDEREF) { SvGETMAGIC(TOPs); if (!SvOK(TOPs)) { TOPs = vivify_ref(TOPs, CxLVAL(cx) & OPpDEREF); } } } else if (gimme == G_ARRAY) { assert (!(CxLVAL(cx) & OPpDEREF)); if (ref || !CxLVAL(cx)) for (; MARK <= SP; MARK++) *MARK = SvFLAGS(*MARK) & SVs_PADTMP ? sv_mortalcopy(*MARK) : SvTEMP(*MARK) ? *MARK : sv_2mortal(SvREFCNT_inc_simple_NN(*MARK)); else for (; MARK <= SP; MARK++) { if (*MARK != &PL_sv_undef && (SvPADTMP(*MARK) || SvREADONLY(*MARK)) ) { /* Might be flattened array after $#array = */ what = SvREADONLY(*MARK) ? "a readonly value" : "a temporary"; goto croak; } else if (!SvTEMP(*MARK)) *MARK = sv_2mortal(SvREFCNT_inc_simple_NN(*MARK)); } } PUTBACK; LEAVE; POPSUB(cx,sv); /* Stack values are safe: release CV and @_ ... */ cxstack_ix--; PL_curpm = newpm; /* ... and pop $1 et al */ LEAVESUB(sv); return cx->blk_sub.retop; } PP(pp_return) { dSP; dMARK; PERL_CONTEXT *cx; SV **oldsp; const I32 cxix = dopoptosub(cxstack_ix); assert(cxstack_ix >= 0); if (cxix < cxstack_ix) { if (cxix < 0) { if (CxMULTICALL(cxstack)) { /* In this case we must be in a * sort block, which is a CXt_NULL * not a CXt_SUB */ dounwind(0); /* if we were in list context, we would have to splice out * any junk before the return args, like we do in the general * pp_return case, e.g. * sub f { for (junk1, junk2) { return arg1, arg2 }} */ assert(cxstack[0].blk_gimme == G_SCALAR); return 0; } else DIE(aTHX_ "Can't return outside a subroutine"); } dounwind(cxix); } cx = &cxstack[cxix]; oldsp = PL_stack_base + cx->blk_oldsp; if (oldsp != MARK) { /* Handle extra junk on the stack. For example, * for (1,2) { return 3,4 } * leaves 1,2,3,4 on the stack. In list context we * have to splice out the 1,2; In scalar context for * for (1,2) { return } * we need to set sp = oldsp so that pp_leavesub knows * to push &PL_sv_undef onto the stack. * Note that in pp_return we only do the extra processing * required to handle junk; everything else we leave to * pp_leavesub. */ SSize_t nargs = SP - MARK; if (nargs) { if (cx->blk_gimme == G_ARRAY) { /* shift return args to base of call stack frame */ Move(MARK + 1, oldsp + 1, nargs, SV*); PL_stack_sp = oldsp + nargs; } } else PL_stack_sp = oldsp; } /* fall through to a normal exit */ switch (CxTYPE(cx)) { case CXt_EVAL: return CxTRYBLOCK(cx) ? Perl_pp_leavetry(aTHX) : Perl_pp_leaveeval(aTHX); case CXt_SUB: return CvLVALUE(cx->blk_sub.cv) ? Perl_pp_leavesublv(aTHX) : Perl_pp_leavesub(aTHX); case CXt_FORMAT: return Perl_pp_leavewrite(aTHX); default: DIE(aTHX_ "panic: return, type=%u", (unsigned) CxTYPE(cx)); } } static I32 S_unwind_loop(pTHX_ const char * const opname) { I32 cxix; if (PL_op->op_flags & OPf_SPECIAL) { cxix = dopoptoloop(cxstack_ix); if (cxix < 0) /* diag_listed_as: Can't "last" outside a loop block */ Perl_croak(aTHX_ "Can't \"%s\" outside a loop block", opname); } else { dSP; STRLEN label_len; const char * const label = PL_op->op_flags & OPf_STACKED ? SvPV(TOPs,label_len) : (label_len = strlen(cPVOP->op_pv), cPVOP->op_pv); const U32 label_flags = PL_op->op_flags & OPf_STACKED ? SvUTF8(POPs) : (cPVOP->op_private & OPpPV_IS_UTF8) ? SVf_UTF8 : 0; PUTBACK; cxix = dopoptolabel(label, label_len, label_flags); if (cxix < 0) /* diag_listed_as: Label not found for "last %s" */ Perl_croak(aTHX_ "Label not found for \"%s %"SVf"\"", opname, SVfARG(PL_op->op_flags & OPf_STACKED && !SvGMAGICAL(TOPp1s) ? TOPp1s : newSVpvn_flags(label, label_len, label_flags | SVs_TEMP))); } if (cxix < cxstack_ix) dounwind(cxix); return cxix; } PP(pp_last) { PERL_CONTEXT *cx; I32 gimme; OP *nextop = NULL; SV **newsp; PMOP *newpm; S_unwind_loop(aTHX_ "last"); POPBLOCK(cx,newpm); cxstack_ix++; /* temporarily protect top context */ assert( CxTYPE(cx) == CXt_LOOP_LAZYIV || CxTYPE(cx) == CXt_LOOP_LAZYSV || CxTYPE(cx) == CXt_LOOP_FOR || CxTYPE(cx) == CXt_LOOP_PLAIN ); newsp = PL_stack_base + cx->blk_loop.resetsp; nextop = cx->blk_loop.my_op->op_lastop->op_next; TAINT_NOT; PL_stack_sp = newsp; LEAVE; cxstack_ix--; /* Stack values are safe: */ POPLOOP(cx); /* release loop vars ... */ LEAVE; PL_curpm = newpm; /* ... and pop $1 et al */ PERL_UNUSED_VAR(gimme); return nextop; } PP(pp_next) { PERL_CONTEXT *cx; const I32 inner = PL_scopestack_ix; S_unwind_loop(aTHX_ "next"); /* clear off anything above the scope we're re-entering, but * save the rest until after a possible continue block */ TOPBLOCK(cx); if (PL_scopestack_ix < inner) leave_scope(PL_scopestack[PL_scopestack_ix]); PL_curcop = cx->blk_oldcop; PERL_ASYNC_CHECK(); return (cx)->blk_loop.my_op->op_nextop; } PP(pp_redo) { const I32 cxix = S_unwind_loop(aTHX_ "redo"); PERL_CONTEXT *cx; I32 oldsave; OP* redo_op = cxstack[cxix].blk_loop.my_op->op_redoop; if (redo_op->op_type == OP_ENTER) { /* pop one less context to avoid $x being freed in while (my $x..) */ cxstack_ix++; assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_BLOCK); redo_op = redo_op->op_next; } TOPBLOCK(cx); oldsave = PL_scopestack[PL_scopestack_ix - 1]; LEAVE_SCOPE(oldsave); FREETMPS; PL_curcop = cx->blk_oldcop; PERL_ASYNC_CHECK(); return redo_op; } STATIC OP * S_dofindlabel(pTHX_ OP *o, const char *label, STRLEN len, U32 flags, OP **opstack, OP **oplimit) { OP **ops = opstack; static const char* const too_deep = "Target of goto is too deeply nested"; PERL_ARGS_ASSERT_DOFINDLABEL; if (ops >= oplimit) Perl_croak(aTHX_ "%s", too_deep); if (o->op_type == OP_LEAVE || o->op_type == OP_SCOPE || o->op_type == OP_LEAVELOOP || o->op_type == OP_LEAVESUB || o->op_type == OP_LEAVETRY) { *ops++ = cUNOPo->op_first; if (ops >= oplimit) Perl_croak(aTHX_ "%s", too_deep); } *ops = 0; if (o->op_flags & OPf_KIDS) { OP *kid; /* First try all the kids at this level, since that's likeliest. */ for (kid = cUNOPo->op_first; kid; kid = OpSIBLING(kid)) { if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) { STRLEN kid_label_len; U32 kid_label_flags; const char *kid_label = CopLABEL_len_flags(kCOP, &kid_label_len, &kid_label_flags); if (kid_label && ( ( (kid_label_flags & SVf_UTF8) != (flags & SVf_UTF8) ) ? (flags & SVf_UTF8) ? (bytes_cmp_utf8( (const U8*)kid_label, kid_label_len, (const U8*)label, len) == 0) : (bytes_cmp_utf8( (const U8*)label, len, (const U8*)kid_label, kid_label_len) == 0) : ( len == kid_label_len && ((kid_label == label) || memEQ(kid_label, label, len))))) return kid; } } for (kid = cUNOPo->op_first; kid; kid = OpSIBLING(kid)) { if (kid == PL_lastgotoprobe) continue; if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) { if (ops == opstack) *ops++ = kid; else if (ops[-1]->op_type == OP_NEXTSTATE || ops[-1]->op_type == OP_DBSTATE) ops[-1] = kid; else *ops++ = kid; } if ((o = dofindlabel(kid, label, len, flags, ops, oplimit))) return o; } } *ops = 0; return 0; } /* also used for: pp_dump() */ PP(pp_goto) { dVAR; dSP; OP *retop = NULL; I32 ix; PERL_CONTEXT *cx; #define GOTO_DEPTH 64 OP *enterops[GOTO_DEPTH]; const char *label = NULL; STRLEN label_len = 0; U32 label_flags = 0; const bool do_dump = (PL_op->op_type == OP_DUMP); static const char* const must_have_label = "goto must have label"; if (PL_op->op_flags & OPf_STACKED) { /* goto EXPR or goto &foo */ SV * const sv = POPs; SvGETMAGIC(sv); /* This egregious kludge implements goto &subroutine */ if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVCV) { I32 cxix; PERL_CONTEXT *cx; CV *cv = MUTABLE_CV(SvRV(sv)); AV *arg = GvAV(PL_defgv); I32 oldsave; retry: if (!CvROOT(cv) && !CvXSUB(cv)) { const GV * const gv = CvGV(cv); if (gv) { GV *autogv; SV *tmpstr; /* autoloaded stub? */ if (cv != GvCV(gv) && (cv = GvCV(gv))) goto retry; autogv = gv_autoload_pvn(GvSTASH(gv), GvNAME(gv), GvNAMELEN(gv), GvNAMEUTF8(gv) ? SVf_UTF8 : 0); if (autogv && (cv = GvCV(autogv))) goto retry; tmpstr = sv_newmortal(); gv_efullname3(tmpstr, gv, NULL); DIE(aTHX_ "Goto undefined subroutine &%"SVf"", SVfARG(tmpstr)); } DIE(aTHX_ "Goto undefined subroutine"); } /* First do some returnish stuff. */ SvREFCNT_inc_simple_void(cv); /* avoid premature free during unwind */ FREETMPS; cxix = dopoptosub(cxstack_ix); if (cxix < cxstack_ix) { if (cxix < 0) { SvREFCNT_dec(cv); DIE(aTHX_ "Can't goto subroutine outside a subroutine"); } dounwind(cxix); } TOPBLOCK(cx); SPAGAIN; /* ban goto in eval: see <20050521150056.GC20213@iabyn.com> */ if (CxTYPE(cx) == CXt_EVAL) { SvREFCNT_dec(cv); if (CxREALEVAL(cx)) /* diag_listed_as: Can't goto subroutine from an eval-%s */ DIE(aTHX_ "Can't goto subroutine from an eval-string"); else /* diag_listed_as: Can't goto subroutine from an eval-%s */ DIE(aTHX_ "Can't goto subroutine from an eval-block"); } else if (CxMULTICALL(cx)) { SvREFCNT_dec(cv); DIE(aTHX_ "Can't goto subroutine from a sort sub (or similar callback)"); } if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)) { AV* av = cx->blk_sub.argarray; /* abandon the original @_ if it got reified or if it is the same as the current @_ */ if (AvREAL(av) || av == arg) { SvREFCNT_dec(av); av = newAV(); AvREIFY_only(av); PAD_SVl(0) = MUTABLE_SV(cx->blk_sub.argarray = av); } else CLEAR_ARGARRAY(av); } /* We donate this refcount later to the callee’s pad. */ SvREFCNT_inc_simple_void(arg); if (CxTYPE(cx) == CXt_SUB && !(CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth)) SvREFCNT_dec(cx->blk_sub.cv); oldsave = PL_scopestack[PL_scopestack_ix - 1]; LEAVE_SCOPE(oldsave); /* A destructor called during LEAVE_SCOPE could have undefined * our precious cv. See bug #99850. */ if (!CvROOT(cv) && !CvXSUB(cv)) { const GV * const gv = CvGV(cv); SvREFCNT_dec(arg); if (gv) { SV * const tmpstr = sv_newmortal(); gv_efullname3(tmpstr, gv, NULL); DIE(aTHX_ "Goto undefined subroutine &%"SVf"", SVfARG(tmpstr)); } DIE(aTHX_ "Goto undefined subroutine"); } /* Now do some callish stuff. */ SAVETMPS; SAVEFREESV(cv); /* later, undo the 'avoid premature free' hack */ if (CvISXSUB(cv)) { SV **newsp; I32 gimme; const SSize_t items = arg ? AvFILL(arg) + 1 : 0; const bool m = arg ? cBOOL(SvRMAGICAL(arg)) : 0; SV** mark; PERL_UNUSED_VAR(newsp); PERL_UNUSED_VAR(gimme); /* put GvAV(defgv) back onto stack */ if (items) { EXTEND(SP, items+1); /* @_ could have been extended. */ } mark = SP; if (items) { SSize_t index; bool r = cBOOL(AvREAL(arg)); for (index=0; indexblk_sub.savearray; SvREFCNT_dec(arg); } retop = cx->blk_sub.retop; /* XS subs don't have a CxSUB, so pop it */ POPBLOCK(cx, PL_curpm); /* Push a mark for the start of arglist */ PUSHMARK(mark); PUTBACK; (void)(*CvXSUB(cv))(aTHX_ cv); LEAVE; goto _return; } else { PADLIST * const padlist = CvPADLIST(cv); cx->blk_sub.cv = cv; cx->blk_sub.olddepth = CvDEPTH(cv); CvDEPTH(cv)++; if (CvDEPTH(cv) < 2) SvREFCNT_inc_simple_void_NN(cv); else { if (CvDEPTH(cv) == PERL_SUB_DEPTH_WARN && ckWARN(WARN_RECURSION)) sub_crush_depth(cv); pad_push(padlist, CvDEPTH(cv)); } PL_curcop = cx->blk_oldcop; SAVECOMPPAD(); PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv)); if (CxHASARGS(cx)) { CX_CURPAD_SAVE(cx->blk_sub); /* cx->blk_sub.argarray has no reference count, so we need something to hang on to our argument array so that cx->blk_sub.argarray does not end up pointing to freed memory as the result of undef *_. So put it in the callee’s pad, donating our refer- ence count. */ if (arg) { SvREFCNT_dec(PAD_SVl(0)); PAD_SVl(0) = (SV *)(cx->blk_sub.argarray = arg); } /* GvAV(PL_defgv) might have been modified on scope exit, so restore it. */ if (arg != GvAV(PL_defgv)) { AV * const av = GvAV(PL_defgv); GvAV(PL_defgv) = (AV *)SvREFCNT_inc_simple(arg); SvREFCNT_dec(av); } } else SvREFCNT_dec(arg); if (PERLDB_SUB) { /* Checking curstash breaks DProf. */ Perl_get_db_sub(aTHX_ NULL, cv); if (PERLDB_GOTO) { CV * const gotocv = get_cvs("DB::goto", 0); if (gotocv) { PUSHMARK( PL_stack_sp ); call_sv(MUTABLE_SV(gotocv), G_SCALAR | G_NODEBUG); PL_stack_sp--; } } } retop = CvSTART(cv); goto putback_return; } } else { /* goto EXPR */ label = SvPV_nomg_const(sv, label_len); label_flags = SvUTF8(sv); } } else if (!(PL_op->op_flags & OPf_SPECIAL)) { /* goto LABEL or dump LABEL */ label = cPVOP->op_pv; label_flags = (cPVOP->op_private & OPpPV_IS_UTF8) ? SVf_UTF8 : 0; label_len = strlen(label); } if (!(do_dump || label_len)) DIE(aTHX_ "%s", must_have_label); PERL_ASYNC_CHECK(); if (label_len) { OP *gotoprobe = NULL; bool leaving_eval = FALSE; bool in_block = FALSE; PERL_CONTEXT *last_eval_cx = NULL; /* find label */ PL_lastgotoprobe = NULL; *enterops = 0; for (ix = cxstack_ix; ix >= 0; ix--) { cx = &cxstack[ix]; switch (CxTYPE(cx)) { case CXt_EVAL: leaving_eval = TRUE; if (!CxTRYBLOCK(cx)) { gotoprobe = (last_eval_cx ? last_eval_cx->blk_eval.old_eval_root : PL_eval_root); last_eval_cx = cx; break; } /* else fall through */ case CXt_LOOP_LAZYIV: case CXt_LOOP_LAZYSV: case CXt_LOOP_FOR: case CXt_LOOP_PLAIN: case CXt_GIVEN: case CXt_WHEN: gotoprobe = OpSIBLING(cx->blk_oldcop); break; case CXt_SUBST: continue; case CXt_BLOCK: if (ix) { gotoprobe = OpSIBLING(cx->blk_oldcop); in_block = TRUE; } else gotoprobe = PL_main_root; break; case CXt_SUB: if (CvDEPTH(cx->blk_sub.cv) && !CxMULTICALL(cx)) { gotoprobe = CvROOT(cx->blk_sub.cv); break; } /* FALLTHROUGH */ case CXt_FORMAT: case CXt_NULL: DIE(aTHX_ "Can't \"goto\" out of a pseudo block"); default: if (ix) DIE(aTHX_ "panic: goto, type=%u, ix=%ld", CxTYPE(cx), (long) ix); gotoprobe = PL_main_root; break; } if (gotoprobe) { OP *sibl1, *sibl2; retop = dofindlabel(gotoprobe, label, label_len, label_flags, enterops, enterops + GOTO_DEPTH); if (retop) break; if ( (sibl1 = OpSIBLING(gotoprobe)) && sibl1->op_type == OP_UNSTACK && (sibl2 = OpSIBLING(sibl1))) { retop = dofindlabel(sibl2, label, label_len, label_flags, enterops, enterops + GOTO_DEPTH); if (retop) break; } } PL_lastgotoprobe = gotoprobe; } if (!retop) DIE(aTHX_ "Can't find label %"UTF8f, UTF8fARG(label_flags, label_len, label)); /* if we're leaving an eval, check before we pop any frames that we're not going to punt, otherwise the error won't be caught */ if (leaving_eval && *enterops && enterops[1]) { I32 i; for (i = 1; enterops[i]; i++) if (enterops[i]->op_type == OP_ENTERITER) DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop"); } if (*enterops && enterops[1]) { I32 i = enterops[1]->op_type == OP_ENTER && in_block ? 2 : 1; if (enterops[i]) deprecate("\"goto\" to jump into a construct"); } /* pop unwanted frames */ if (ix < cxstack_ix) { I32 oldsave; if (ix < 0) DIE(aTHX_ "panic: docatch: illegal ix=%ld", (long)ix); dounwind(ix); TOPBLOCK(cx); oldsave = PL_scopestack[PL_scopestack_ix]; LEAVE_SCOPE(oldsave); } /* push wanted frames */ if (*enterops && enterops[1]) { OP * const oldop = PL_op; ix = enterops[1]->op_type == OP_ENTER && in_block ? 2 : 1; for (; enterops[ix]; ix++) { PL_op = enterops[ix]; /* Eventually we may want to stack the needed arguments * for each op. For now, we punt on the hard ones. */ if (PL_op->op_type == OP_ENTERITER) DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop"); PL_op->op_ppaddr(aTHX); } PL_op = oldop; } } if (do_dump) { #ifdef VMS if (!retop) retop = PL_main_start; #endif PL_restartop = retop; PL_do_undump = TRUE; my_unexec(); PL_restartop = 0; /* hmm, must be GNU unexec().. */ PL_do_undump = FALSE; } putback_return: PL_stack_sp = sp; _return: PERL_ASYNC_CHECK(); return retop; } PP(pp_exit) { dSP; I32 anum; if (MAXARG < 1) anum = 0; else if (!TOPs) { anum = 0; (void)POPs; } else { anum = SvIVx(POPs); #ifdef VMS if (anum == 1 && SvTRUE(cop_hints_fetch_pvs(PL_curcop, "vmsish_exit", 0))) anum = 0; VMSISH_HUSHED = VMSISH_HUSHED || (PL_curcop->op_private & OPpHUSH_VMSISH); #endif } PL_exit_flags |= PERL_EXIT_EXPECTED; my_exit(anum); PUSHs(&PL_sv_undef); RETURN; } /* Eval. */ STATIC void S_save_lines(pTHX_ AV *array, SV *sv) { const char *s = SvPVX_const(sv); const char * const send = SvPVX_const(sv) + SvCUR(sv); I32 line = 1; PERL_ARGS_ASSERT_SAVE_LINES; while (s && s < send) { const char *t; SV * const tmpstr = newSV_type(SVt_PVMG); t = (const char *)memchr(s, '\n', send - s); if (t) t++; else t = send; sv_setpvn(tmpstr, s, t - s); av_store(array, line++, tmpstr); s = t; } } /* =for apidoc docatch Check for the cases 0 or 3 of cur_env.je_ret, only used inside an eval context. 0 is used as continue inside eval, 3 is used for a die caught by an inner eval - continue inner loop See F: je_mustcatch, when set at any runlevel to TRUE, means eval ops must establish a local jmpenv to handle exception traps. =cut */ STATIC OP * S_docatch(pTHX_ OP *o) { int ret; OP * const oldop = PL_op; dJMPENV; #ifdef DEBUGGING assert(CATCH_GET == TRUE); #endif PL_op = o; JMPENV_PUSH(ret); switch (ret) { case 0: assert(cxstack_ix >= 0); assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL); cxstack[cxstack_ix].blk_eval.cur_top_env = PL_top_env; redo_body: CALLRUNOPS(aTHX); break; case 3: /* die caught by an inner eval - continue inner loop */ if (PL_restartop && PL_restartjmpenv == PL_top_env) { PL_restartjmpenv = NULL; PL_op = PL_restartop; PL_restartop = 0; goto redo_body; } /* FALLTHROUGH */ default: JMPENV_POP; PL_op = oldop; JMPENV_JUMP(ret); NOT_REACHED; /* NOTREACHED */ } JMPENV_POP; PL_op = oldop; return NULL; } /* =for apidoc find_runcv Locate the CV corresponding to the currently executing sub or eval. If C is non_null, skip CVs that are in the DB package and populate C<*db_seqp> with the cop sequence number at the point that the DB:: code was entered. (This allows debuggers to eval in the scope of the breakpoint rather than in the scope of the debugger itself.) =cut */ CV* Perl_find_runcv(pTHX_ U32 *db_seqp) { return Perl_find_runcv_where(aTHX_ 0, 0, db_seqp); } /* If this becomes part of the API, it might need a better name. */ CV * Perl_find_runcv_where(pTHX_ U8 cond, IV arg, U32 *db_seqp) { PERL_SI *si; int level = 0; if (db_seqp) *db_seqp = PL_curcop == &PL_compiling ? PL_cop_seqmax : PL_curcop->cop_seq; for (si = PL_curstackinfo; si; si = si->si_prev) { I32 ix; for (ix = si->si_cxix; ix >= 0; ix--) { const PERL_CONTEXT *cx = &(si->si_cxstack[ix]); CV *cv = NULL; if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) { cv = cx->blk_sub.cv; /* skip DB:: code */ if (db_seqp && PL_debstash && CvSTASH(cv) == PL_debstash) { *db_seqp = cx->blk_oldcop->cop_seq; continue; } if (cx->cx_type & CXp_SUB_RE) continue; } else if (CxTYPE(cx) == CXt_EVAL && !CxTRYBLOCK(cx)) cv = cx->blk_eval.cv; if (cv) { switch (cond) { case FIND_RUNCV_padid_eq: if (!CvPADLIST(cv) || CvPADLIST(cv)->xpadl_id != (U32)arg) continue; return cv; case FIND_RUNCV_level_eq: if (level++ != arg) continue; /* GERONIMO! */ default: return cv; } } } } return cond == FIND_RUNCV_padid_eq ? NULL : PL_main_cv; } /* Run yyparse() in a setjmp wrapper. Returns: * 0: yyparse() successful * 1: yyparse() failed * 3: yyparse() died */ STATIC int S_try_yyparse(pTHX_ int gramtype) { int ret; dJMPENV; assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL); JMPENV_PUSH(ret); switch (ret) { case 0: ret = yyparse(gramtype) ? 1 : 0; break; case 3: break; default: JMPENV_POP; JMPENV_JUMP(ret); NOT_REACHED; /* NOTREACHED */ } JMPENV_POP; return ret; } /* Compile a require/do or an eval ''. * * outside is the lexically enclosing CV (if any) that invoked us. * seq is the current COP scope value. * hh is the saved hints hash, if any. * * Returns a bool indicating whether the compile was successful; if so, * PL_eval_start contains the first op of the compiled code; otherwise, * pushes undef. * * This function is called from two places: pp_require and pp_entereval. * These can be distinguished by whether PL_op is entereval. */ STATIC bool S_doeval(pTHX_ int gimme, CV* outside, U32 seq, HV *hh) { dSP; OP * const saveop = PL_op; bool clear_hints = saveop->op_type != OP_ENTEREVAL; COP * const oldcurcop = PL_curcop; bool in_require = (saveop->op_type == OP_REQUIRE); int yystatus; CV *evalcv; PL_in_eval = (in_require ? (EVAL_INREQUIRE | (PL_in_eval & EVAL_INEVAL)) : (EVAL_INEVAL | ((PL_op->op_private & OPpEVAL_RE_REPARSING) ? EVAL_RE_REPARSING : 0))); PUSHMARK(SP); evalcv = MUTABLE_CV(newSV_type(SVt_PVCV)); CvEVAL_on(evalcv); assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL); cxstack[cxstack_ix].blk_eval.cv = evalcv; cxstack[cxstack_ix].blk_gimme = gimme; CvOUTSIDE_SEQ(evalcv) = seq; CvOUTSIDE(evalcv) = MUTABLE_CV(SvREFCNT_inc_simple(outside)); /* set up a scratch pad */ CvPADLIST_set(evalcv, pad_new(padnew_SAVE)); PL_op = NULL; /* avoid PL_op and PL_curpad referring to different CVs */ SAVEMORTALIZESV(evalcv); /* must remain until end of current statement */ /* make sure we compile in the right package */ if (CopSTASH_ne(PL_curcop, PL_curstash)) { SAVEGENERICSV(PL_curstash); PL_curstash = (HV *)CopSTASH(PL_curcop); if (SvTYPE(PL_curstash) != SVt_PVHV) PL_curstash = NULL; else SvREFCNT_inc_simple_void(PL_curstash); } /* XXX:ajgo do we really need to alloc an AV for begin/checkunit */ SAVESPTR(PL_beginav); PL_beginav = newAV(); SAVEFREESV(PL_beginav); SAVESPTR(PL_unitcheckav); PL_unitcheckav = newAV(); SAVEFREESV(PL_unitcheckav); ENTER_with_name("evalcomp"); SAVESPTR(PL_compcv); PL_compcv = evalcv; /* try to compile it */ PL_eval_root = NULL; PL_curcop = &PL_compiling; if ((saveop->op_type != OP_REQUIRE) && (saveop->op_flags & OPf_SPECIAL)) PL_in_eval |= EVAL_KEEPERR; else CLEAR_ERRSV(); SAVEHINTS(); if (clear_hints) { PL_hints = 0; hv_clear(GvHV(PL_hintgv)); } else { PL_hints = saveop->op_private & OPpEVAL_COPHH ? oldcurcop->cop_hints : saveop->op_targ; /* making 'use re eval' not be in scope when compiling the * qr/mabye_has_runtime_code_block/ ensures that we don't get * infinite recursion when S_has_runtime_code() gives a false * positive: the second time round, HINT_RE_EVAL isn't set so we * don't bother calling S_has_runtime_code() */ if (PL_in_eval & EVAL_RE_REPARSING) PL_hints &= ~HINT_RE_EVAL; if (hh) { /* SAVEHINTS created a new HV in PL_hintgv, which we need to GC */ SvREFCNT_dec(GvHV(PL_hintgv)); GvHV(PL_hintgv) = hh; } } SAVECOMPILEWARNINGS(); if (clear_hints) { if (PL_dowarn & G_WARN_ALL_ON) PL_compiling.cop_warnings = pWARN_ALL ; else if (PL_dowarn & G_WARN_ALL_OFF) PL_compiling.cop_warnings = pWARN_NONE ; else PL_compiling.cop_warnings = pWARN_STD ; } else { PL_compiling.cop_warnings = DUP_WARNINGS(oldcurcop->cop_warnings); cophh_free(CopHINTHASH_get(&PL_compiling)); if (Perl_cop_fetch_label(aTHX_ oldcurcop, NULL, NULL)) { /* The label, if present, is the first entry on the chain. So rather than writing a blank label in front of it (which involves an allocation), just use the next entry in the chain. */ PL_compiling.cop_hints_hash = cophh_copy(oldcurcop->cop_hints_hash->refcounted_he_next); /* Check the assumption that this removed the label. */ assert(Perl_cop_fetch_label(aTHX_ &PL_compiling, NULL, NULL) == NULL); } else PL_compiling.cop_hints_hash = cophh_copy(oldcurcop->cop_hints_hash); } CALL_BLOCK_HOOKS(bhk_eval, saveop); /* note that yyparse() may raise an exception, e.g. C, * so honour CATCH_GET and trap it here if necessary */ yystatus = (!in_require && CATCH_GET) ? S_try_yyparse(aTHX_ GRAMPROG) : yyparse(GRAMPROG); if (yystatus || PL_parser->error_count || !PL_eval_root) { SV **newsp; /* Used by POPBLOCK. */ PERL_CONTEXT *cx; I32 optype; /* Used by POPEVAL. */ SV *namesv; SV *errsv = NULL; cx = NULL; namesv = NULL; PERL_UNUSED_VAR(newsp); PERL_UNUSED_VAR(optype); /* note that if yystatus == 3, then the EVAL CX block has already * been popped, and various vars restored */ PL_op = saveop; if (yystatus != 3) { if (PL_eval_root) { op_free(PL_eval_root); PL_eval_root = NULL; } SP = PL_stack_base + POPMARK; /* pop original mark */ POPBLOCK(cx,PL_curpm); POPEVAL(cx); namesv = cx->blk_eval.old_namesv; /* POPBLOCK renders LEAVE_with_name("evalcomp") unnecessary. */ LEAVE_with_name("eval"); /* pp_entereval knows about this LEAVE. */ } errsv = ERRSV; if (in_require) { if (!cx) { /* If cx is still NULL, it means that we didn't go in the * POPEVAL branch. */ cx = &cxstack[cxstack_ix]; assert(CxTYPE(cx) == CXt_EVAL); namesv = cx->blk_eval.old_namesv; } (void)hv_store(GvHVn(PL_incgv), SvPVX_const(namesv), SvUTF8(namesv) ? -(I32)SvCUR(namesv) : (I32)SvCUR(namesv), &PL_sv_undef, 0); Perl_croak(aTHX_ "%"SVf"Compilation failed in require", SVfARG(errsv ? errsv : newSVpvs_flags("Unknown error\n", SVs_TEMP))); } else { if (!*(SvPV_nolen_const(errsv))) { sv_setpvs(errsv, "Compilation error"); } } if (gimme != G_ARRAY) PUSHs(&PL_sv_undef); PUTBACK; return FALSE; } else LEAVE_with_name("evalcomp"); CopLINE_set(&PL_compiling, 0); SAVEFREEOP(PL_eval_root); cv_forget_slab(evalcv); DEBUG_x(dump_eval()); /* Register with debugger: */ if (PERLDB_INTER && saveop->op_type == OP_REQUIRE) { CV * const cv = get_cvs("DB::postponed", 0); if (cv) { dSP; PUSHMARK(SP); XPUSHs(MUTABLE_SV(CopFILEGV(&PL_compiling))); PUTBACK; call_sv(MUTABLE_SV(cv), G_DISCARD); } } if (PL_unitcheckav) { OP *es = PL_eval_start; call_list(PL_scopestack_ix, PL_unitcheckav); PL_eval_start = es; } /* compiled okay, so do it */ CvDEPTH(evalcv) = 1; SP = PL_stack_base + POPMARK; /* pop original mark */ PL_op = saveop; /* The caller may need it. */ PL_parser->lex_state = LEX_NOTPARSING; /* $^S needs this. */ PUTBACK; return TRUE; } STATIC PerlIO * S_check_type_and_open(pTHX_ SV *name) { Stat_t st; STRLEN len; PerlIO * retio; const char *p = SvPV_const(name, len); int st_rc; PERL_ARGS_ASSERT_CHECK_TYPE_AND_OPEN; /* checking here captures a reasonable error message when * PERL_DISABLE_PMC is true, but when PMC checks are enabled, the * user gets a confusing message about looking for the .pmc file * rather than for the .pm file. * This check prevents a \0 in @INC causing problems. */ if (!IS_SAFE_PATHNAME(p, len, "require")) return NULL; /* on Win32 stat is expensive (it does an open() and close() twice and a couple other IO calls), the open will fail with a dir on its own with errno EACCES, so only do a stat to separate a dir from a real EACCES caused by user perms */ #ifndef WIN32 /* we use the value of errno later to see how stat() or open() failed. * We don't want it set if the stat succeeded but we still failed, * such as if the name exists, but is a directory */ errno = 0; st_rc = PerlLIO_stat(p, &st); if (st_rc < 0 || S_ISDIR(st.st_mode) || S_ISBLK(st.st_mode)) { return NULL; } #endif retio = PerlIO_openn(aTHX_ ":", PERL_SCRIPT_MODE, -1, 0, 0, NULL, 1, &name); #ifdef WIN32 /* EACCES stops the INC search early in pp_require to implement feature RT #113422 */ if(!retio && errno == EACCES) { /* exists but probably a directory */ int eno; st_rc = PerlLIO_stat(p, &st); if (st_rc >= 0) { if(S_ISDIR(st.st_mode) || S_ISBLK(st.st_mode)) eno = 0; else eno = EACCES; errno = eno; } } #endif return retio; } #ifndef PERL_DISABLE_PMC STATIC PerlIO * S_doopen_pm(pTHX_ SV *name) { STRLEN namelen; const char *p = SvPV_const(name, namelen); PERL_ARGS_ASSERT_DOOPEN_PM; /* check the name before trying for the .pmc name to avoid the * warning referring to the .pmc which the user probably doesn't * know or care about */ if (!IS_SAFE_PATHNAME(p, namelen, "require")) return NULL; if (namelen > 3 && memEQs(p + namelen - 3, 3, ".pm")) { SV *const pmcsv = sv_newmortal(); Stat_t pmcstat; SvSetSV_nosteal(pmcsv,name); sv_catpvs(pmcsv, "c"); if (PerlLIO_stat(SvPV_nolen_const(pmcsv), &pmcstat) >= 0) return check_type_and_open(pmcsv); } return check_type_and_open(name); } #else # define doopen_pm(name) check_type_and_open(name) #endif /* !PERL_DISABLE_PMC */ /* require doesn't search for absolute names, or when the name is explicitly relative the current directory */ PERL_STATIC_INLINE bool S_path_is_searchable(const char *name) { PERL_ARGS_ASSERT_PATH_IS_SEARCHABLE; if (PERL_FILE_IS_ABSOLUTE(name) #ifdef WIN32 || (*name == '.' && ((name[1] == '/' || (name[1] == '.' && name[2] == '/')) || (name[1] == '\\' || ( name[1] == '.' && name[2] == '\\'))) ) #else || (*name == '.' && (name[1] == '/' || (name[1] == '.' && name[2] == '/'))) #endif ) { return FALSE; } else return TRUE; } /* also used for: pp_dofile() */ PP(pp_require) { dSP; PERL_CONTEXT *cx; SV *sv; const char *name; STRLEN len; char * unixname; STRLEN unixlen; #ifdef VMS int vms_unixname = 0; char *unixdir; #endif const char *tryname = NULL; SV *namesv = NULL; const I32 gimme = GIMME_V; int filter_has_file = 0; PerlIO *tryrsfp = NULL; SV *filter_cache = NULL; SV *filter_state = NULL; SV *filter_sub = NULL; SV *hook_sv = NULL; OP *op; int saved_errno; bool path_searchable; sv = POPs; SvGETMAGIC(sv); if ( (SvNIOKp(sv) || SvVOK(sv)) && PL_op->op_type != OP_DOFILE) { sv = sv_2mortal(new_version(sv)); if (!Perl_sv_derived_from_pvn(aTHX_ PL_patchlevel, STR_WITH_LEN("version"), 0)) upg_version(PL_patchlevel, TRUE); if (cUNOP->op_first->op_type == OP_CONST && cUNOP->op_first->op_private & OPpCONST_NOVER) { if ( vcmp(sv,PL_patchlevel) <= 0 ) DIE(aTHX_ "Perls since %"SVf" too modern--this is %"SVf", stopped", SVfARG(sv_2mortal(vnormal(sv))), SVfARG(sv_2mortal(vnormal(PL_patchlevel))) ); } else { if ( vcmp(sv,PL_patchlevel) > 0 ) { I32 first = 0; AV *lav; SV * const req = SvRV(sv); SV * const pv = *hv_fetchs(MUTABLE_HV(req), "original", FALSE); /* get the left hand term */ lav = MUTABLE_AV(SvRV(*hv_fetchs(MUTABLE_HV(req), "version", FALSE))); first = SvIV(*av_fetch(lav,0,0)); if ( first > (int)PERL_REVISION /* probably 'use 6.0' */ || hv_exists(MUTABLE_HV(req), "qv", 2 ) /* qv style */ || av_tindex(lav) > 1 /* FP with > 3 digits */ || strstr(SvPVX(pv),".0") /* FP with leading 0 */ ) { DIE(aTHX_ "Perl %"SVf" required--this is only " "%"SVf", stopped", SVfARG(sv_2mortal(vnormal(req))), SVfARG(sv_2mortal(vnormal(PL_patchlevel))) ); } else { /* probably 'use 5.10' or 'use 5.8' */ SV *hintsv; I32 second = 0; if (av_tindex(lav)>=1) second = SvIV(*av_fetch(lav,1,0)); second /= second >= 600 ? 100 : 10; hintsv = Perl_newSVpvf(aTHX_ "v%d.%d.0", (int)first, (int)second); upg_version(hintsv, TRUE); DIE(aTHX_ "Perl %"SVf" required (did you mean %"SVf"?)" "--this is only %"SVf", stopped", SVfARG(sv_2mortal(vnormal(req))), SVfARG(sv_2mortal(vnormal(sv_2mortal(hintsv)))), SVfARG(sv_2mortal(vnormal(PL_patchlevel))) ); } } } RETPUSHYES; } if (!SvOK(sv)) DIE(aTHX_ "Missing or undefined argument to require"); name = SvPV_nomg_const(sv, len); if (!(name && len > 0 && *name)) DIE(aTHX_ "Missing or undefined argument to require"); if (!IS_SAFE_PATHNAME(name, len, "require")) { DIE(aTHX_ "Can't locate %s: %s", pv_escape(newSVpvs_flags("",SVs_TEMP),SvPVX(sv),SvCUR(sv), SvCUR(sv)*2,NULL, SvUTF8(sv)?PERL_PV_ESCAPE_UNI:0), Strerror(ENOENT)); } TAINT_PROPER("require"); path_searchable = path_is_searchable(name); #ifdef VMS /* The key in the %ENV hash is in the syntax of file passed as the argument * usually this is in UNIX format, but sometimes in VMS format, which * can result in a module being pulled in more than once. * To prevent this, the key must be stored in UNIX format if the VMS * name can be translated to UNIX. */ if ((unixname = tounixspec(name, SvPVX(sv_2mortal(newSVpv("", VMS_MAXRSS-1))))) != NULL) { unixlen = strlen(unixname); vms_unixname = 1; } else #endif { /* if not VMS or VMS name can not be translated to UNIX, pass it * through. */ unixname = (char *) name; unixlen = len; } if (PL_op->op_type == OP_REQUIRE) { SV * const * const svp = hv_fetch(GvHVn(PL_incgv), unixname, unixlen, 0); if ( svp ) { if (*svp != &PL_sv_undef) RETPUSHYES; else DIE(aTHX_ "Attempt to reload %s aborted.\n" "Compilation failed in require", unixname); } } LOADING_FILE_PROBE(unixname); /* prepare to compile file */ if (!path_searchable) { /* At this point, name is SvPVX(sv) */ tryname = name; tryrsfp = doopen_pm(sv); } if (!tryrsfp && !(errno == EACCES && !path_searchable)) { AV * const ar = GvAVn(PL_incgv); SSize_t i; #ifdef VMS if (vms_unixname) #endif { SV *nsv = sv; namesv = newSV_type(SVt_PV); for (i = 0; i <= AvFILL(ar); i++) { SV * const dirsv = *av_fetch(ar, i, TRUE); SvGETMAGIC(dirsv); if (SvROK(dirsv)) { int count; SV **svp; SV *loader = dirsv; if (SvTYPE(SvRV(loader)) == SVt_PVAV && !SvOBJECT(SvRV(loader))) { loader = *av_fetch(MUTABLE_AV(SvRV(loader)), 0, TRUE); SvGETMAGIC(loader); } Perl_sv_setpvf(aTHX_ namesv, "/loader/0x%"UVxf"/%s", PTR2UV(SvRV(dirsv)), name); tryname = SvPVX_const(namesv); tryrsfp = NULL; if (SvPADTMP(nsv)) { nsv = sv_newmortal(); SvSetSV_nosteal(nsv,sv); } ENTER_with_name("call_INC"); SAVETMPS; EXTEND(SP, 2); PUSHMARK(SP); PUSHs(dirsv); PUSHs(nsv); PUTBACK; if (SvGMAGICAL(loader)) { SV *l = sv_newmortal(); sv_setsv_nomg(l, loader); loader = l; } if (sv_isobject(loader)) count = call_method("INC", G_ARRAY); else count = call_sv(loader, G_ARRAY); SPAGAIN; if (count > 0) { int i = 0; SV *arg; SP -= count - 1; arg = SP[i++]; if (SvROK(arg) && (SvTYPE(SvRV(arg)) <= SVt_PVLV) && !isGV_with_GP(SvRV(arg))) { filter_cache = SvRV(arg); if (i < count) { arg = SP[i++]; } } if (SvROK(arg) && isGV_with_GP(SvRV(arg))) { arg = SvRV(arg); } if (isGV_with_GP(arg)) { IO * const io = GvIO((const GV *)arg); ++filter_has_file; if (io) { tryrsfp = IoIFP(io); if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { PerlIO_close(IoOFP(io)); } IoIFP(io) = NULL; IoOFP(io) = NULL; } if (i < count) { arg = SP[i++]; } } if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVCV) { filter_sub = arg; SvREFCNT_inc_simple_void_NN(filter_sub); if (i < count) { filter_state = SP[i]; SvREFCNT_inc_simple_void(filter_state); } } if (!tryrsfp && (filter_cache || filter_sub)) { tryrsfp = PerlIO_open(BIT_BUCKET, PERL_SCRIPT_MODE); } SP--; } /* FREETMPS may free our filter_cache */ SvREFCNT_inc_simple_void(filter_cache); PUTBACK; FREETMPS; LEAVE_with_name("call_INC"); /* Now re-mortalize it. */ sv_2mortal(filter_cache); /* Adjust file name if the hook has set an %INC entry. This needs to happen after the FREETMPS above. */ svp = hv_fetch(GvHVn(PL_incgv), name, len, 0); if (svp) tryname = SvPV_nolen_const(*svp); if (tryrsfp) { hook_sv = dirsv; break; } filter_has_file = 0; filter_cache = NULL; if (filter_state) { SvREFCNT_dec_NN(filter_state); filter_state = NULL; } if (filter_sub) { SvREFCNT_dec_NN(filter_sub); filter_sub = NULL; } } else { if (path_searchable) { const char *dir; STRLEN dirlen; if (SvOK(dirsv)) { dir = SvPV_nomg_const(dirsv, dirlen); } else { dir = ""; dirlen = 0; } if (!IS_SAFE_SYSCALL(dir, dirlen, "@INC entry", "require")) continue; #ifdef VMS if ((unixdir = tounixpath(dir, SvPVX(sv_2mortal(newSVpv("", VMS_MAXRSS-1))))) == NULL) continue; sv_setpv(namesv, unixdir); sv_catpv(namesv, unixname); #else # ifdef __SYMBIAN32__ if (PL_origfilename[0] && PL_origfilename[1] == ':' && !(dir[0] && dir[1] == ':')) Perl_sv_setpvf(aTHX_ namesv, "%c:%s\\%s", PL_origfilename[0], dir, name); else Perl_sv_setpvf(aTHX_ namesv, "%s\\%s", dir, name); # else /* The equivalent of Perl_sv_setpvf(aTHX_ namesv, "%s/%s", dir, name); but without the need to parse the format string, or call strlen on either pointer, and with the correct allocation up front. */ { char *tmp = SvGROW(namesv, dirlen + len + 2); memcpy(tmp, dir, dirlen); tmp +=dirlen; /* Avoid '//' */ if (!dirlen || *(tmp-1) != '/') { *tmp++ = '/'; } else { /* So SvCUR_set reports the correct length below */ dirlen--; } /* name came from an SV, so it will have a '\0' at the end that we can copy as part of this memcpy(). */ memcpy(tmp, name, len + 1); SvCUR_set(namesv, dirlen + len + 1); SvPOK_on(namesv); } # endif #endif TAINT_PROPER("require"); tryname = SvPVX_const(namesv); tryrsfp = doopen_pm(namesv); if (tryrsfp) { if (tryname[0] == '.' && tryname[1] == '/') { ++tryname; while (*++tryname == '/') {} } break; } else if (errno == EMFILE || errno == EACCES) { /* no point in trying other paths if out of handles; * on the other hand, if we couldn't open one of the * files, then going on with the search could lead to * unexpected results; see perl #113422 */ break; } } } } } } saved_errno = errno; /* sv_2mortal can realloc things */ sv_2mortal(namesv); if (!tryrsfp) { if (PL_op->op_type == OP_REQUIRE) { if(saved_errno == EMFILE || saved_errno == EACCES) { /* diag_listed_as: Can't locate %s */ DIE(aTHX_ "Can't locate %s: %s: %s", name, tryname, Strerror(saved_errno)); } else { if (namesv) { /* did we lookup @INC? */ AV * const ar = GvAVn(PL_incgv); SSize_t i; SV *const msg = newSVpvs_flags("", SVs_TEMP); SV *const inc = newSVpvs_flags("", SVs_TEMP); for (i = 0; i <= AvFILL(ar); i++) { sv_catpvs(inc, " "); sv_catsv(inc, *av_fetch(ar, i, TRUE)); } if (len >= 4 && memEQ(name + len - 3, ".pm", 4)) { const char *c, *e = name + len - 3; sv_catpv(msg, " (you may need to install the "); for (c = name; c < e; c++) { if (*c == '/') { sv_catpvs(msg, "::"); } else { sv_catpvn(msg, c, 1); } } sv_catpv(msg, " module)"); } else if (len >= 2 && memEQ(name + len - 2, ".h", 3)) { sv_catpv(msg, " (change .h to .ph maybe?) (did you run h2ph?)"); } else if (len >= 3 && memEQ(name + len - 3, ".ph", 4)) { sv_catpv(msg, " (did you run h2ph?)"); } /* diag_listed_as: Can't locate %s */ DIE(aTHX_ "Can't locate %s in @INC%" SVf " (@INC contains:%" SVf ")", name, msg, inc); } } DIE(aTHX_ "Can't locate %s", name); } CLEAR_ERRSV(); RETPUSHUNDEF; } else SETERRNO(0, SS_NORMAL); /* Assume success here to prevent recursive requirement. */ /* name is never assigned to again, so len is still strlen(name) */ /* Check whether a hook in @INC has already filled %INC */ if (!hook_sv) { (void)hv_store(GvHVn(PL_incgv), unixname, unixlen, newSVpv(tryname,0),0); } else { SV** const svp = hv_fetch(GvHVn(PL_incgv), unixname, unixlen, 0); if (!svp) (void)hv_store(GvHVn(PL_incgv), unixname, unixlen, SvREFCNT_inc_simple(hook_sv), 0 ); } ENTER_with_name("eval"); SAVETMPS; SAVECOPFILE_FREE(&PL_compiling); CopFILE_set(&PL_compiling, tryname); lex_start(NULL, tryrsfp, 0); if (filter_sub || filter_cache) { /* We can use the SvPV of the filter PVIO itself as our cache, rather than hanging another SV from it. In turn, filter_add() optionally takes the SV to use as the filter (or creates a new SV if passed NULL), so simply pass in whatever value filter_cache has. */ SV * const fc = filter_cache ? newSV(0) : NULL; SV *datasv; if (fc) sv_copypv(fc, filter_cache); datasv = filter_add(S_run_user_filter, fc); IoLINES(datasv) = filter_has_file; IoTOP_GV(datasv) = MUTABLE_GV(filter_state); IoBOTTOM_GV(datasv) = MUTABLE_GV(filter_sub); } /* switch to eval mode */ PUSHBLOCK(cx, CXt_EVAL, SP); PUSHEVAL(cx, name); cx->blk_eval.retop = PL_op->op_next; SAVECOPLINE(&PL_compiling); CopLINE_set(&PL_compiling, 0); PUTBACK; if (doeval(gimme, NULL, PL_curcop->cop_seq, NULL)) op = DOCATCH(PL_eval_start); else op = PL_op->op_next; LOADED_FILE_PROBE(unixname); return op; } /* This is a op added to hold the hints hash for pp_entereval. The hash can be modified by the code being eval'ed, so we return a copy instead. */ PP(pp_hintseval) { dSP; mXPUSHs(MUTABLE_SV(hv_copy_hints_hv(MUTABLE_HV(cSVOP_sv)))); RETURN; } PP(pp_entereval) { dSP; PERL_CONTEXT *cx; SV *sv; const I32 gimme = GIMME_V; const U32 was = PL_breakable_sub_gen; char tbuf[TYPE_DIGITS(long) + 12]; bool saved_delete = FALSE; char *tmpbuf = tbuf; STRLEN len; CV* runcv; U32 seq, lex_flags = 0; HV *saved_hh = NULL; const bool bytes = PL_op->op_private & OPpEVAL_BYTES; if (PL_op->op_private & OPpEVAL_HAS_HH) { saved_hh = MUTABLE_HV(SvREFCNT_inc(POPs)); } else if (PL_hints & HINT_LOCALIZE_HH || ( PL_op->op_private & OPpEVAL_COPHH && PL_curcop->cop_hints & HINT_LOCALIZE_HH )) { saved_hh = cop_hints_2hv(PL_curcop, 0); hv_magic(saved_hh, NULL, PERL_MAGIC_hints); } sv = POPs; if (!SvPOK(sv)) { /* make sure we've got a plain PV (no overload etc) before testing * for taint. Making a copy here is probably overkill, but better * safe than sorry */ STRLEN len; const char * const p = SvPV_const(sv, len); sv = newSVpvn_flags(p, len, SVs_TEMP | SvUTF8(sv)); lex_flags |= LEX_START_COPIED; if (bytes && SvUTF8(sv)) SvPVbyte_force(sv, len); } else if (bytes && SvUTF8(sv)) { /* Don't modify someone else's scalar */ STRLEN len; sv = newSVsv(sv); (void)sv_2mortal(sv); SvPVbyte_force(sv,len); lex_flags |= LEX_START_COPIED; } TAINT_IF(SvTAINTED(sv)); TAINT_PROPER("eval"); ENTER_with_name("eval"); lex_start(sv, NULL, lex_flags | (PL_op->op_private & OPpEVAL_UNICODE ? LEX_IGNORE_UTF8_HINTS : bytes ? LEX_EVALBYTES : LEX_START_SAME_FILTER ) ); SAVETMPS; /* switch to eval mode */ if (PERLDB_NAMEEVAL && CopLINE(PL_curcop)) { SV * const temp_sv = sv_newmortal(); Perl_sv_setpvf(aTHX_ temp_sv, "_<(eval %lu)[%s:%"IVdf"]", (unsigned long)++PL_evalseq, CopFILE(PL_curcop), (IV)CopLINE(PL_curcop)); tmpbuf = SvPVX(temp_sv); len = SvCUR(temp_sv); } else len = my_snprintf(tmpbuf, sizeof(tbuf), "_<(eval %lu)", (unsigned long)++PL_evalseq); SAVECOPFILE_FREE(&PL_compiling); CopFILE_set(&PL_compiling, tmpbuf+2); SAVECOPLINE(&PL_compiling); CopLINE_set(&PL_compiling, 1); /* special case: an eval '' executed within the DB package gets lexically * placed in the first non-DB CV rather than the current CV - this * allows the debugger to execute code, find lexicals etc, in the * scope of the code being debugged. Passing &seq gets find_runcv * to do the dirty work for us */ runcv = find_runcv(&seq); PUSHBLOCK(cx, (CXt_EVAL|CXp_REAL), SP); PUSHEVAL(cx, 0); cx->blk_eval.retop = PL_op->op_next; /* prepare to compile string */ if (PERLDB_LINE_OR_SAVESRC && PL_curstash != PL_debstash) save_lines(CopFILEAV(&PL_compiling), PL_parser->linestr); else { /* XXX For Cs within BEGIN {} blocks, this ends up deleting the eval's FILEGV from the stash before gv_check() runs (i.e. before run-time proper). To work around the coredump that ensues, we always turn GvMULTI_on for any globals that were introduced within evals. See force_ident(). GSAR 96-10-12 */ char *const safestr = savepvn(tmpbuf, len); SAVEDELETE(PL_defstash, safestr, len); saved_delete = TRUE; } PUTBACK; if (doeval(gimme, runcv, seq, saved_hh)) { if (was != PL_breakable_sub_gen /* Some subs defined here. */ ? PERLDB_LINE_OR_SAVESRC : PERLDB_SAVESRC_NOSUBS) { /* Retain the filegv we created. */ } else if (!saved_delete) { char *const safestr = savepvn(tmpbuf, len); SAVEDELETE(PL_defstash, safestr, len); } return DOCATCH(PL_eval_start); } else { /* We have already left the scope set up earlier thanks to the LEAVE in doeval(). */ if (was != PL_breakable_sub_gen /* Some subs defined here. */ ? PERLDB_LINE_OR_SAVESRC : PERLDB_SAVESRC_INVALID) { /* Retain the filegv we created. */ } else if (!saved_delete) { (void)hv_delete(PL_defstash, tmpbuf, len, G_DISCARD); } return PL_op->op_next; } } PP(pp_leaveeval) { dSP; SV **newsp; PMOP *newpm; I32 gimme; PERL_CONTEXT *cx; OP *retop; I32 optype; SV *namesv; CV *evalcv; /* grab this value before POPEVAL restores old PL_in_eval */ bool keep = cBOOL(PL_in_eval & EVAL_KEEPERR); PERL_ASYNC_CHECK(); POPBLOCK(cx,newpm); POPEVAL(cx); namesv = cx->blk_eval.old_namesv; retop = cx->blk_eval.retop; evalcv = cx->blk_eval.cv; SP = leave_common((gimme == G_VOID) ? SP : newsp, SP, newsp, gimme, SVs_TEMP, FALSE); PL_curpm = newpm; /* Don't pop $1 et al till now */ #ifdef DEBUGGING assert(CvDEPTH(evalcv) == 1); #endif CvDEPTH(evalcv) = 0; if (optype == OP_REQUIRE && !(gimme == G_SCALAR ? SvTRUE(*SP) : SP > newsp)) { /* Unassume the success we assumed earlier. */ (void)hv_delete(GvHVn(PL_incgv), SvPVX_const(namesv), SvUTF8(namesv) ? -(I32)SvCUR(namesv) : (I32)SvCUR(namesv), G_DISCARD); Perl_die(aTHX_ "%"SVf" did not return a true value", SVfARG(namesv)); NOT_REACHED; /* NOTREACHED */ /* die_unwind() did LEAVE, or we won't be here */ } else { LEAVE_with_name("eval"); if (!keep) CLEAR_ERRSV(); } RETURNOP(retop); } /* Common code for Perl_call_sv and Perl_fold_constants, put here to keep it close to the related Perl_create_eval_scope. */ void Perl_delete_eval_scope(pTHX) { SV **newsp; PMOP *newpm; I32 gimme; PERL_CONTEXT *cx; I32 optype; POPBLOCK(cx,newpm); POPEVAL(cx); PL_curpm = newpm; LEAVE_with_name("eval_scope"); PERL_UNUSED_VAR(newsp); PERL_UNUSED_VAR(gimme); PERL_UNUSED_VAR(optype); } /* Common-ish code salvaged from Perl_call_sv and pp_entertry, because it was also needed by Perl_fold_constants. */ PERL_CONTEXT * Perl_create_eval_scope(pTHX_ U32 flags) { PERL_CONTEXT *cx; const I32 gimme = GIMME_V; ENTER_with_name("eval_scope"); SAVETMPS; PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp); PUSHEVAL(cx, 0); PL_in_eval = EVAL_INEVAL; if (flags & G_KEEPERR) PL_in_eval |= EVAL_KEEPERR; else CLEAR_ERRSV(); if (flags & G_FAKINGEVAL) { PL_eval_root = PL_op; /* Only needed so that goto works right. */ } return cx; } PP(pp_entertry) { PERL_CONTEXT * const cx = create_eval_scope(0); cx->blk_eval.retop = cLOGOP->op_other->op_next; return DOCATCH(PL_op->op_next); } PP(pp_leavetry) { dSP; SV **newsp; PMOP *newpm; I32 gimme; PERL_CONTEXT *cx; I32 optype; OP *retop; PERL_ASYNC_CHECK(); POPBLOCK(cx,newpm); retop = cx->blk_eval.retop; POPEVAL(cx); PERL_UNUSED_VAR(optype); SP = leave_common(newsp, SP, newsp, gimme, SVs_PADTMP|SVs_TEMP, FALSE); PL_curpm = newpm; /* Don't pop $1 et al till now */ LEAVE_with_name("eval_scope"); CLEAR_ERRSV(); RETURNOP(retop); } PP(pp_entergiven) { dSP; PERL_CONTEXT *cx; const I32 gimme = GIMME_V; ENTER_with_name("given"); SAVETMPS; assert(!PL_op->op_targ); /* used to be set for lexical $_ */ SAVE_DEFSV; DEFSV_set(POPs); PUSHBLOCK(cx, CXt_GIVEN, SP); PUSHGIVEN(cx); RETURN; } PP(pp_leavegiven) { dSP; PERL_CONTEXT *cx; I32 gimme; SV **newsp; PMOP *newpm; PERL_UNUSED_CONTEXT; POPBLOCK(cx,newpm); assert(CxTYPE(cx) == CXt_GIVEN); SP = leave_common(newsp, SP, newsp, gimme, SVs_PADTMP|SVs_TEMP, FALSE); PL_curpm = newpm; /* Don't pop $1 et al till now */ LEAVE_with_name("given"); RETURN; } /* Helper routines used by pp_smartmatch */ STATIC PMOP * S_make_matcher(pTHX_ REGEXP *re) { PMOP *matcher = (PMOP *) newPMOP(OP_MATCH, OPf_WANT_SCALAR | OPf_STACKED); PERL_ARGS_ASSERT_MAKE_MATCHER; PM_SETRE(matcher, ReREFCNT_inc(re)); SAVEFREEOP((OP *) matcher); ENTER_with_name("matcher"); SAVETMPS; SAVEOP(); return matcher; } STATIC bool S_matcher_matches_sv(pTHX_ PMOP *matcher, SV *sv) { dSP; bool result; PERL_ARGS_ASSERT_MATCHER_MATCHES_SV; PL_op = (OP *) matcher; XPUSHs(sv); PUTBACK; (void) Perl_pp_match(aTHX); SPAGAIN; result = SvTRUEx(POPs); PUTBACK; return result; } STATIC void S_destroy_matcher(pTHX_ PMOP *matcher) { PERL_ARGS_ASSERT_DESTROY_MATCHER; PERL_UNUSED_ARG(matcher); FREETMPS; LEAVE_with_name("matcher"); } /* Do a smart match */ PP(pp_smartmatch) { DEBUG_M(Perl_deb(aTHX_ "Starting smart match resolution\n")); return do_smartmatch(NULL, NULL, 0); } /* This version of do_smartmatch() implements the * table of smart matches that is found in perlsyn. */ STATIC OP * S_do_smartmatch(pTHX_ HV *seen_this, HV *seen_other, const bool copied) { dSP; bool object_on_left = FALSE; SV *e = TOPs; /* e is for 'expression' */ SV *d = TOPm1s; /* d is for 'default', as in PL_defgv */ /* Take care only to invoke mg_get() once for each argument. * Currently we do this by copying the SV if it's magical. */ if (d) { if (!copied && SvGMAGICAL(d)) d = sv_mortalcopy(d); } else d = &PL_sv_undef; assert(e); if (SvGMAGICAL(e)) e = sv_mortalcopy(e); /* First of all, handle overload magic of the rightmost argument */ if (SvAMAGIC(e)) { SV * tmpsv; DEBUG_M(Perl_deb(aTHX_ " applying rule Any-Object\n")); DEBUG_M(Perl_deb(aTHX_ " attempting overload\n")); tmpsv = amagic_call(d, e, smart_amg, AMGf_noleft); if (tmpsv) { SPAGAIN; (void)POPs; SETs(tmpsv); RETURN; } DEBUG_M(Perl_deb(aTHX_ " failed to run overload method; continuing...\n")); } SP -= 2; /* Pop the values */ PUTBACK; /* ~~ undef */ if (!SvOK(e)) { DEBUG_M(Perl_deb(aTHX_ " applying rule Any-undef\n")); if (SvOK(d)) RETPUSHNO; else RETPUSHYES; } if (SvROK(e) && SvOBJECT(SvRV(e)) && (SvTYPE(SvRV(e)) != SVt_REGEXP)) { DEBUG_M(Perl_deb(aTHX_ " applying rule Any-Object\n")); Perl_croak(aTHX_ "Smart matching a non-overloaded object breaks encapsulation"); } if (SvROK(d) && SvOBJECT(SvRV(d)) && (SvTYPE(SvRV(d)) != SVt_REGEXP)) object_on_left = TRUE; /* ~~ sub */ if (SvROK(e) && SvTYPE(SvRV(e)) == SVt_PVCV) { I32 c; if (object_on_left) { goto sm_any_sub; /* Treat objects like scalars */ } else if (SvROK(d) && SvTYPE(SvRV(d)) == SVt_PVHV) { /* Test sub truth for each key */ HE *he; bool andedresults = TRUE; HV *hv = (HV*) SvRV(d); I32 numkeys = hv_iterinit(hv); DEBUG_M(Perl_deb(aTHX_ " applying rule Hash-CodeRef\n")); if (numkeys == 0) RETPUSHYES; while ( (he = hv_iternext(hv)) ) { DEBUG_M(Perl_deb(aTHX_ " testing hash key...\n")); ENTER_with_name("smartmatch_hash_key_test"); SAVETMPS; PUSHMARK(SP); PUSHs(hv_iterkeysv(he)); PUTBACK; c = call_sv(e, G_SCALAR); SPAGAIN; if (c == 0) andedresults = FALSE; else andedresults = SvTRUEx(POPs) && andedresults; FREETMPS; LEAVE_with_name("smartmatch_hash_key_test"); } if (andedresults) RETPUSHYES; else RETPUSHNO; } else if (SvROK(d) && SvTYPE(SvRV(d)) == SVt_PVAV) { /* Test sub truth for each element */ SSize_t i; bool andedresults = TRUE; AV *av = (AV*) SvRV(d); const I32 len = av_tindex(av); DEBUG_M(Perl_deb(aTHX_ " applying rule Array-CodeRef\n")); if (len == -1) RETPUSHYES; for (i = 0; i <= len; ++i) { SV * const * const svp = av_fetch(av, i, FALSE); DEBUG_M(Perl_deb(aTHX_ " testing array element...\n")); ENTER_with_name("smartmatch_array_elem_test"); SAVETMPS; PUSHMARK(SP); if (svp) PUSHs(*svp); PUTBACK; c = call_sv(e, G_SCALAR); SPAGAIN; if (c == 0) andedresults = FALSE; else andedresults = SvTRUEx(POPs) && andedresults; FREETMPS; LEAVE_with_name("smartmatch_array_elem_test"); } if (andedresults) RETPUSHYES; else RETPUSHNO; } else { sm_any_sub: DEBUG_M(Perl_deb(aTHX_ " applying rule Any-CodeRef\n")); ENTER_with_name("smartmatch_coderef"); SAVETMPS; PUSHMARK(SP); PUSHs(d); PUTBACK; c = call_sv(e, G_SCALAR); SPAGAIN; if (c == 0) PUSHs(&PL_sv_no); else if (SvTEMP(TOPs)) SvREFCNT_inc_void(TOPs); FREETMPS; LEAVE_with_name("smartmatch_coderef"); RETURN; } } /* ~~ %hash */ else if (SvROK(e) && SvTYPE(SvRV(e)) == SVt_PVHV) { if (object_on_left) { goto sm_any_hash; /* Treat objects like scalars */ } else if (!SvOK(d)) { DEBUG_M(Perl_deb(aTHX_ " applying rule Any-Hash ($a undef)\n")); RETPUSHNO; } else if (SvROK(d) && SvTYPE(SvRV(d)) == SVt_PVHV) { /* Check that the key-sets are identical */ HE *he; HV *other_hv = MUTABLE_HV(SvRV(d)); bool tied; bool other_tied; U32 this_key_count = 0, other_key_count = 0; HV *hv = MUTABLE_HV(SvRV(e)); DEBUG_M(Perl_deb(aTHX_ " applying rule Hash-Hash\n")); /* Tied hashes don't know how many keys they have. */ tied = cBOOL(SvTIED_mg((SV*)hv, PERL_MAGIC_tied)); other_tied = cBOOL(SvTIED_mg((const SV *)other_hv, PERL_MAGIC_tied)); if (!tied ) { if(other_tied) { /* swap HV sides */ HV * const temp = other_hv; other_hv = hv; hv = temp; tied = TRUE; other_tied = FALSE; } else if(HvUSEDKEYS((const HV *) hv) != HvUSEDKEYS(other_hv)) RETPUSHNO; } /* The hashes have the same number of keys, so it suffices to check that one is a subset of the other. */ (void) hv_iterinit(hv); while ( (he = hv_iternext(hv)) ) { SV *key = hv_iterkeysv(he); DEBUG_M(Perl_deb(aTHX_ " comparing hash key...\n")); ++ this_key_count; if(!hv_exists_ent(other_hv, key, 0)) { (void) hv_iterinit(hv); /* reset iterator */ RETPUSHNO; } } if (other_tied) { (void) hv_iterinit(other_hv); while ( hv_iternext(other_hv) ) ++other_key_count; } else other_key_count = HvUSEDKEYS(other_hv); if (this_key_count != other_key_count) RETPUSHNO; else RETPUSHYES; } else if (SvROK(d) && SvTYPE(SvRV(d)) == SVt_PVAV) { AV * const other_av = MUTABLE_AV(SvRV(d)); const SSize_t other_len = av_tindex(other_av) + 1; SSize_t i; HV *hv = MUTABLE_HV(SvRV(e)); DEBUG_M(Perl_deb(aTHX_ " applying rule Array-Hash\n")); for (i = 0; i < other_len; ++i) { SV ** const svp = av_fetch(other_av, i, FALSE); DEBUG_M(Perl_deb(aTHX_ " checking for key existence...\n")); if (svp) { /* ??? When can this not happen? */ if (hv_exists_ent(hv, *svp, 0)) RETPUSHYES; } } RETPUSHNO; } else if (SvROK(d) && SvTYPE(SvRV(d)) == SVt_REGEXP) { DEBUG_M(Perl_deb(aTHX_ " applying rule Regex-Hash\n")); sm_regex_hash: { PMOP * const matcher = make_matcher((REGEXP*) SvRV(d)); HE *he; HV *hv = MUTABLE_HV(SvRV(e)); (void) hv_iterinit(hv); while ( (he = hv_iternext(hv)) ) { DEBUG_M(Perl_deb(aTHX_ " testing key against pattern...\n")); PUTBACK; if (matcher_matches_sv(matcher, hv_iterkeysv(he))) { SPAGAIN; (void) hv_iterinit(hv); destroy_matcher(matcher); RETPUSHYES; } SPAGAIN; } destroy_matcher(matcher); RETPUSHNO; } } else { sm_any_hash: DEBUG_M(Perl_deb(aTHX_ " applying rule Any-Hash\n")); if (hv_exists_ent(MUTABLE_HV(SvRV(e)), d, 0)) RETPUSHYES; else RETPUSHNO; } } /* ~~ @array */ else if (SvROK(e) && SvTYPE(SvRV(e)) == SVt_PVAV) { if (object_on_left) { goto sm_any_array; /* Treat objects like scalars */ } else if (SvROK(d) && SvTYPE(SvRV(d)) == SVt_PVHV) { AV * const other_av = MUTABLE_AV(SvRV(e)); const SSize_t other_len = av_tindex(other_av) + 1; SSize_t i; DEBUG_M(Perl_deb(aTHX_ " applying rule Hash-Array\n")); for (i = 0; i < other_len; ++i) { SV ** const svp = av_fetch(other_av, i, FALSE); DEBUG_M(Perl_deb(aTHX_ " testing for key existence...\n")); if (svp) { /* ??? When can this not happen? */ if (hv_exists_ent(MUTABLE_HV(SvRV(d)), *svp, 0)) RETPUSHYES; } } RETPUSHNO; } if (SvROK(d) && SvTYPE(SvRV(d)) == SVt_PVAV) { AV *other_av = MUTABLE_AV(SvRV(d)); DEBUG_M(Perl_deb(aTHX_ " applying rule Array-Array\n")); if (av_tindex(MUTABLE_AV(SvRV(e))) != av_tindex(other_av)) RETPUSHNO; else { SSize_t i; const SSize_t other_len = av_tindex(other_av); if (NULL == seen_this) { seen_this = newHV(); (void) sv_2mortal(MUTABLE_SV(seen_this)); } if (NULL == seen_other) { seen_other = newHV(); (void) sv_2mortal(MUTABLE_SV(seen_other)); } for(i = 0; i <= other_len; ++i) { SV * const * const this_elem = av_fetch(MUTABLE_AV(SvRV(e)), i, FALSE); SV * const * const other_elem = av_fetch(other_av, i, FALSE); if (!this_elem || !other_elem) { if ((this_elem && SvOK(*this_elem)) || (other_elem && SvOK(*other_elem))) RETPUSHNO; } else if (hv_exists_ent(seen_this, sv_2mortal(newSViv(PTR2IV(*this_elem))), 0) || hv_exists_ent(seen_other, sv_2mortal(newSViv(PTR2IV(*other_elem))), 0)) { if (*this_elem != *other_elem) RETPUSHNO; } else { (void)hv_store_ent(seen_this, sv_2mortal(newSViv(PTR2IV(*this_elem))), &PL_sv_undef, 0); (void)hv_store_ent(seen_other, sv_2mortal(newSViv(PTR2IV(*other_elem))), &PL_sv_undef, 0); PUSHs(*other_elem); PUSHs(*this_elem); PUTBACK; DEBUG_M(Perl_deb(aTHX_ " recursively comparing array element...\n")); (void) do_smartmatch(seen_this, seen_other, 0); SPAGAIN; DEBUG_M(Perl_deb(aTHX_ " recursion finished\n")); if (!SvTRUEx(POPs)) RETPUSHNO; } } RETPUSHYES; } } else if (SvROK(d) && SvTYPE(SvRV(d)) == SVt_REGEXP) { DEBUG_M(Perl_deb(aTHX_ " applying rule Regex-Array\n")); sm_regex_array: { PMOP * const matcher = make_matcher((REGEXP*) SvRV(d)); const SSize_t this_len = av_tindex(MUTABLE_AV(SvRV(e))); SSize_t i; for(i = 0; i <= this_len; ++i) { SV * const * const svp = av_fetch(MUTABLE_AV(SvRV(e)), i, FALSE); DEBUG_M(Perl_deb(aTHX_ " testing element against pattern...\n")); PUTBACK; if (svp && matcher_matches_sv(matcher, *svp)) { SPAGAIN; destroy_matcher(matcher); RETPUSHYES; } SPAGAIN; } destroy_matcher(matcher); RETPUSHNO; } } else if (!SvOK(d)) { /* undef ~~ array */ const SSize_t this_len = av_tindex(MUTABLE_AV(SvRV(e))); SSize_t i; DEBUG_M(Perl_deb(aTHX_ " applying rule Undef-Array\n")); for (i = 0; i <= this_len; ++i) { SV * const * const svp = av_fetch(MUTABLE_AV(SvRV(e)), i, FALSE); DEBUG_M(Perl_deb(aTHX_ " testing for undef element...\n")); if (!svp || !SvOK(*svp)) RETPUSHYES; } RETPUSHNO; } else { sm_any_array: { SSize_t i; const SSize_t this_len = av_tindex(MUTABLE_AV(SvRV(e))); DEBUG_M(Perl_deb(aTHX_ " applying rule Any-Array\n")); for (i = 0; i <= this_len; ++i) { SV * const * const svp = av_fetch(MUTABLE_AV(SvRV(e)), i, FALSE); if (!svp) continue; PUSHs(d); PUSHs(*svp); PUTBACK; /* infinite recursion isn't supposed to happen here */ DEBUG_M(Perl_deb(aTHX_ " recursively testing array element...\n")); (void) do_smartmatch(NULL, NULL, 1); SPAGAIN; DEBUG_M(Perl_deb(aTHX_ " recursion finished\n")); if (SvTRUEx(POPs)) RETPUSHYES; } RETPUSHNO; } } } /* ~~ qr// */ else if (SvROK(e) && SvTYPE(SvRV(e)) == SVt_REGEXP) { if (!object_on_left && SvROK(d) && SvTYPE(SvRV(d)) == SVt_PVHV) { SV *t = d; d = e; e = t; DEBUG_M(Perl_deb(aTHX_ " applying rule Hash-Regex\n")); goto sm_regex_hash; } else if (!object_on_left && SvROK(d) && SvTYPE(SvRV(d)) == SVt_PVAV) { SV *t = d; d = e; e = t; DEBUG_M(Perl_deb(aTHX_ " applying rule Array-Regex\n")); goto sm_regex_array; } else { PMOP * const matcher = make_matcher((REGEXP*) SvRV(e)); bool result; DEBUG_M(Perl_deb(aTHX_ " applying rule Any-Regex\n")); PUTBACK; result = matcher_matches_sv(matcher, d); SPAGAIN; PUSHs(result ? &PL_sv_yes : &PL_sv_no); destroy_matcher(matcher); RETURN; } } /* ~~ scalar */ /* See if there is overload magic on left */ else if (object_on_left && SvAMAGIC(d)) { SV *tmpsv; DEBUG_M(Perl_deb(aTHX_ " applying rule Object-Any\n")); DEBUG_M(Perl_deb(aTHX_ " attempting overload\n")); PUSHs(d); PUSHs(e); PUTBACK; tmpsv = amagic_call(d, e, smart_amg, AMGf_noright); if (tmpsv) { SPAGAIN; (void)POPs; SETs(tmpsv); RETURN; } SP -= 2; DEBUG_M(Perl_deb(aTHX_ " failed to run overload method; falling back...\n")); goto sm_any_scalar; } else if (!SvOK(d)) { /* undef ~~ scalar ; we already know that the scalar is SvOK */ DEBUG_M(Perl_deb(aTHX_ " applying rule undef-Any\n")); RETPUSHNO; } else sm_any_scalar: if (SvNIOK(e) || (SvPOK(e) && looks_like_number(e) && SvNIOK(d))) { DEBUG_M(if (SvNIOK(e)) Perl_deb(aTHX_ " applying rule Any-Num\n"); else Perl_deb(aTHX_ " applying rule Num-numish\n"); ); /* numeric comparison */ PUSHs(d); PUSHs(e); PUTBACK; if (CopHINTS_get(PL_curcop) & HINT_INTEGER) (void) Perl_pp_i_eq(aTHX); else (void) Perl_pp_eq(aTHX); SPAGAIN; if (SvTRUEx(POPs)) RETPUSHYES; else RETPUSHNO; } /* As a last resort, use string comparison */ DEBUG_M(Perl_deb(aTHX_ " applying rule Any-Any\n")); PUSHs(d); PUSHs(e); PUTBACK; return Perl_pp_seq(aTHX); } PP(pp_enterwhen) { dSP; PERL_CONTEXT *cx; const I32 gimme = GIMME_V; /* This is essentially an optimization: if the match fails, we don't want to push a context and then pop it again right away, so we skip straight to the op that follows the leavewhen. RETURNOP calls PUTBACK which restores the stack pointer after the POPs. */ if ((0 == (PL_op->op_flags & OPf_SPECIAL)) && !SvTRUEx(POPs)) RETURNOP(cLOGOP->op_other->op_next); ENTER_with_name("when"); SAVETMPS; PUSHBLOCK(cx, CXt_WHEN, SP); PUSHWHEN(cx); RETURN; } PP(pp_leavewhen) { dSP; I32 cxix; PERL_CONTEXT *cx; I32 gimme; SV **newsp; PMOP *newpm; cxix = dopoptogiven(cxstack_ix); if (cxix < 0) /* diag_listed_as: Can't "when" outside a topicalizer */ DIE(aTHX_ "Can't \"%s\" outside a topicalizer", PL_op->op_flags & OPf_SPECIAL ? "default" : "when"); POPBLOCK(cx,newpm); assert(CxTYPE(cx) == CXt_WHEN); SP = leave_common(newsp, SP, newsp, gimme, SVs_PADTMP|SVs_TEMP, FALSE); PL_curpm = newpm; /* pop $1 et al */ LEAVE_with_name("when"); if (cxix < cxstack_ix) dounwind(cxix); cx = &cxstack[cxix]; if (CxFOREACH(cx)) { /* clear off anything above the scope we're re-entering */ I32 inner = PL_scopestack_ix; TOPBLOCK(cx); if (PL_scopestack_ix < inner) leave_scope(PL_scopestack[PL_scopestack_ix]); PL_curcop = cx->blk_oldcop; PERL_ASYNC_CHECK(); return cx->blk_loop.my_op->op_nextop; } else { PERL_ASYNC_CHECK(); RETURNOP(cx->blk_givwhen.leave_op); } } PP(pp_continue) { dSP; I32 cxix; PERL_CONTEXT *cx; I32 gimme; SV **newsp; PMOP *newpm; PERL_UNUSED_VAR(gimme); cxix = dopoptowhen(cxstack_ix); if (cxix < 0) DIE(aTHX_ "Can't \"continue\" outside a when block"); if (cxix < cxstack_ix) dounwind(cxix); POPBLOCK(cx,newpm); assert(CxTYPE(cx) == CXt_WHEN); SP = newsp; PL_curpm = newpm; /* pop $1 et al */ LEAVE_with_name("when"); RETURNOP(cx->blk_givwhen.leave_op->op_next); } PP(pp_break) { I32 cxix; PERL_CONTEXT *cx; cxix = dopoptogiven(cxstack_ix); if (cxix < 0) DIE(aTHX_ "Can't \"break\" outside a given block"); cx = &cxstack[cxix]; if (CxFOREACH(cx)) DIE(aTHX_ "Can't \"break\" in a loop topicalizer"); if (cxix < cxstack_ix) dounwind(cxix); /* Restore the sp at the time we entered the given block */ TOPBLOCK(cx); return cx->blk_givwhen.leave_op; } static MAGIC * S_doparseform(pTHX_ SV *sv) { STRLEN len; char *s = SvPV(sv, len); char *send; char *base = NULL; /* start of current field */ I32 skipspaces = 0; /* number of contiguous spaces seen */ bool noblank = FALSE; /* ~ or ~~ seen on this line */ bool repeat = FALSE; /* ~~ seen on this line */ bool postspace = FALSE; /* a text field may need right padding */ U32 *fops; U32 *fpc; U32 *linepc = NULL; /* position of last FF_LINEMARK */ I32 arg; bool ischop; /* it's a ^ rather than a @ */ bool unchopnum = FALSE; /* at least one @ (i.e. non-chop) num field seen */ int maxops = 12; /* FF_LINEMARK + FF_END + 10 (\0 without preceding \n) */ MAGIC *mg = NULL; SV *sv_copy; PERL_ARGS_ASSERT_DOPARSEFORM; if (len == 0) Perl_croak(aTHX_ "Null picture in formline"); if (SvTYPE(sv) >= SVt_PVMG) { /* This might, of course, still return NULL. */ mg = mg_find(sv, PERL_MAGIC_fm); } else { sv_upgrade(sv, SVt_PVMG); } if (mg) { /* still the same as previously-compiled string? */ SV *old = mg->mg_obj; if ( !(!!SvUTF8(old) ^ !!SvUTF8(sv)) && len == SvCUR(old) && strnEQ(SvPVX(old), SvPVX(sv), len) ) { DEBUG_f(PerlIO_printf(Perl_debug_log,"Re-using compiled format\n")); return mg; } DEBUG_f(PerlIO_printf(Perl_debug_log, "Re-compiling format\n")); Safefree(mg->mg_ptr); mg->mg_ptr = NULL; SvREFCNT_dec(old); mg->mg_obj = NULL; } else { DEBUG_f(PerlIO_printf(Perl_debug_log, "Compiling format\n")); mg = sv_magicext(sv, NULL, PERL_MAGIC_fm, &PL_vtbl_fm, NULL, 0); } sv_copy = newSVpvn_utf8(s, len, SvUTF8(sv)); s = SvPV(sv_copy, len); /* work on the copy, not the original */ send = s + len; /* estimate the buffer size needed */ for (base = s; s <= send; s++) { if (*s == '\n' || *s == '@' || *s == '^') maxops += 10; } s = base; base = NULL; Newx(fops, maxops, U32); fpc = fops; if (s < send) { linepc = fpc; *fpc++ = FF_LINEMARK; noblank = repeat = FALSE; base = s; } while (s <= send) { switch (*s++) { default: skipspaces = 0; continue; case '~': if (*s == '~') { repeat = TRUE; skipspaces++; s++; } noblank = TRUE; /* FALLTHROUGH */ case ' ': case '\t': skipspaces++; continue; case 0: if (s < send) { skipspaces = 0; continue; } /* else FALL THROUGH */ case '\n': arg = s - base; skipspaces++; arg -= skipspaces; if (arg) { if (postspace) *fpc++ = FF_SPACE; *fpc++ = FF_LITERAL; *fpc++ = (U32)arg; } postspace = FALSE; if (s <= send) skipspaces--; if (skipspaces) { *fpc++ = FF_SKIP; *fpc++ = (U32)skipspaces; } skipspaces = 0; if (s <= send) *fpc++ = FF_NEWLINE; if (noblank) { *fpc++ = FF_BLANK; if (repeat) arg = fpc - linepc + 1; else arg = 0; *fpc++ = (U32)arg; } if (s < send) { linepc = fpc; *fpc++ = FF_LINEMARK; noblank = repeat = FALSE; base = s; } else s++; continue; case '@': case '^': ischop = s[-1] == '^'; if (postspace) { *fpc++ = FF_SPACE; postspace = FALSE; } arg = (s - base) - 1; if (arg) { *fpc++ = FF_LITERAL; *fpc++ = (U32)arg; } base = s - 1; *fpc++ = FF_FETCH; if (*s == '*') { /* @* or ^* */ s++; *fpc++ = 2; /* skip the @* or ^* */ if (ischop) { *fpc++ = FF_LINESNGL; *fpc++ = FF_CHOP; } else *fpc++ = FF_LINEGLOB; } else if (*s == '#' || (*s == '.' && s[1] == '#')) { /* @###, ^### */ arg = ischop ? FORM_NUM_BLANK : 0; base = s - 1; while (*s == '#') s++; if (*s == '.') { const char * const f = ++s; while (*s == '#') s++; arg |= FORM_NUM_POINT + (s - f); } *fpc++ = s - base; /* fieldsize for FETCH */ *fpc++ = FF_DECIMAL; *fpc++ = (U32)arg; unchopnum |= ! ischop; } else if (*s == '0' && s[1] == '#') { /* Zero padded decimals */ arg = ischop ? FORM_NUM_BLANK : 0; base = s - 1; s++; /* skip the '0' first */ while (*s == '#') s++; if (*s == '.') { const char * const f = ++s; while (*s == '#') s++; arg |= FORM_NUM_POINT + (s - f); } *fpc++ = s - base; /* fieldsize for FETCH */ *fpc++ = FF_0DECIMAL; *fpc++ = (U32)arg; unchopnum |= ! ischop; } else { /* text field */ I32 prespace = 0; bool ismore = FALSE; if (*s == '>') { while (*++s == '>') ; prespace = FF_SPACE; } else if (*s == '|') { while (*++s == '|') ; prespace = FF_HALFSPACE; postspace = TRUE; } else { if (*s == '<') while (*++s == '<') ; postspace = TRUE; } if (*s == '.' && s[1] == '.' && s[2] == '.') { s += 3; ismore = TRUE; } *fpc++ = s - base; /* fieldsize for FETCH */ *fpc++ = ischop ? FF_CHECKCHOP : FF_CHECKNL; if (prespace) *fpc++ = (U32)prespace; /* add SPACE or HALFSPACE */ *fpc++ = FF_ITEM; if (ismore) *fpc++ = FF_MORE; if (ischop) *fpc++ = FF_CHOP; } base = s; skipspaces = 0; continue; } } *fpc++ = FF_END; assert (fpc <= fops + maxops); /* ensure our buffer estimate was valid */ arg = fpc - fops; mg->mg_ptr = (char *) fops; mg->mg_len = arg * sizeof(U32); mg->mg_obj = sv_copy; mg->mg_flags |= MGf_REFCOUNTED; if (unchopnum && repeat) Perl_die(aTHX_ "Repeated format line will never terminate (~~ and @#)"); return mg; } STATIC bool S_num_overflow(NV value, I32 fldsize, I32 frcsize) { /* Can value be printed in fldsize chars, using %*.*f ? */ NV pwr = 1; NV eps = 0.5; bool res = FALSE; int intsize = fldsize - (value < 0 ? 1 : 0); if (frcsize & FORM_NUM_POINT) intsize--; frcsize &= ~(FORM_NUM_POINT|FORM_NUM_BLANK); intsize -= frcsize; while (intsize--) pwr *= 10.0; while (frcsize--) eps /= 10.0; if( value >= 0 ){ if (value + eps >= pwr) res = TRUE; } else { if (value - eps <= -pwr) res = TRUE; } return res; } static I32 S_run_user_filter(pTHX_ int idx, SV *buf_sv, int maxlen) { SV * const datasv = FILTER_DATA(idx); const int filter_has_file = IoLINES(datasv); SV * const filter_state = MUTABLE_SV(IoTOP_GV(datasv)); SV * const filter_sub = MUTABLE_SV(IoBOTTOM_GV(datasv)); int status = 0; SV *upstream; STRLEN got_len; char *got_p = NULL; char *prune_from = NULL; bool read_from_cache = FALSE; STRLEN umaxlen; SV *err = NULL; PERL_ARGS_ASSERT_RUN_USER_FILTER; assert(maxlen >= 0); umaxlen = maxlen; /* I was having segfault trouble under Linux 2.2.5 after a parse error occurred. (Had to hack around it with a test for PL_parser->error_count == 0.) Solaris doesn't segfault -- not sure where the trouble is yet. XXX */ { SV *const cache = datasv; if (SvOK(cache)) { STRLEN cache_len; const char *cache_p = SvPV(cache, cache_len); STRLEN take = 0; if (umaxlen) { /* Running in block mode and we have some cached data already. */ if (cache_len >= umaxlen) { /* In fact, so much data we don't even need to call filter_read. */ take = umaxlen; } } else { const char *const first_nl = (const char *)memchr(cache_p, '\n', cache_len); if (first_nl) { take = first_nl + 1 - cache_p; } } if (take) { sv_catpvn(buf_sv, cache_p, take); sv_chop(cache, cache_p + take); /* Definitely not EOF */ return 1; } sv_catsv(buf_sv, cache); if (umaxlen) { umaxlen -= cache_len; } SvOK_off(cache); read_from_cache = TRUE; } } /* Filter API says that the filter appends to the contents of the buffer. Usually the buffer is "", so the details don't matter. But if it's not, then clearly what it contains is already filtered by this filter, so we don't want to pass it in a second time. I'm going to use a mortal in case the upstream filter croaks. */ upstream = ((SvOK(buf_sv) && sv_len(buf_sv)) || SvGMAGICAL(buf_sv)) ? sv_newmortal() : buf_sv; SvUPGRADE(upstream, SVt_PV); if (filter_has_file) { status = FILTER_READ(idx+1, upstream, 0); } if (filter_sub && status >= 0) { dSP; int count; ENTER_with_name("call_filter_sub"); SAVE_DEFSV; SAVETMPS; EXTEND(SP, 2); DEFSV_set(upstream); PUSHMARK(SP); mPUSHi(0); if (filter_state) { PUSHs(filter_state); } PUTBACK; count = call_sv(filter_sub, G_SCALAR|G_EVAL); SPAGAIN; if (count > 0) { SV *out = POPs; SvGETMAGIC(out); if (SvOK(out)) { status = SvIV(out); } else { SV * const errsv = ERRSV; if (SvTRUE_NN(errsv)) err = newSVsv(errsv); } } PUTBACK; FREETMPS; LEAVE_with_name("call_filter_sub"); } if (SvGMAGICAL(upstream)) { mg_get(upstream); if (upstream == buf_sv) mg_free(buf_sv); } if (SvIsCOW(upstream)) sv_force_normal(upstream); if(!err && SvOK(upstream)) { got_p = SvPV_nomg(upstream, got_len); if (umaxlen) { if (got_len > umaxlen) { prune_from = got_p + umaxlen; } } else { char *const first_nl = (char *)memchr(got_p, '\n', got_len); if (first_nl && first_nl + 1 < got_p + got_len) { /* There's a second line here... */ prune_from = first_nl + 1; } } } if (!err && prune_from) { /* Oh. Too long. Stuff some in our cache. */ STRLEN cached_len = got_p + got_len - prune_from; SV *const cache = datasv; if (SvOK(cache)) { /* Cache should be empty. */ assert(!SvCUR(cache)); } sv_setpvn(cache, prune_from, cached_len); /* If you ask for block mode, you may well split UTF-8 characters. "If it breaks, you get to keep both parts" (Your code is broken if you don't put them back together again before something notices.) */ if (SvUTF8(upstream)) { SvUTF8_on(cache); } if (SvPOK(upstream)) SvCUR_set(upstream, got_len - cached_len); else /* Cannot just use sv_setpvn, as that could free the buffer before we have a chance to assign it. */ sv_usepvn(upstream, savepvn(got_p, got_len - cached_len), got_len - cached_len); *prune_from = 0; /* Can't yet be EOF */ if (status == 0) status = 1; } /* If they are at EOF but buf_sv has something in it, then they may never have touched the SV upstream, so it may be undefined. If we naively concatenate it then we get a warning about use of uninitialised value. */ if (!err && upstream != buf_sv && SvOK(upstream)) { sv_catsv_nomg(buf_sv, upstream); } else if (SvOK(upstream)) (void)SvPV_force_nolen(buf_sv); if (status <= 0) { IoLINES(datasv) = 0; if (filter_state) { SvREFCNT_dec(filter_state); IoTOP_GV(datasv) = NULL; } if (filter_sub) { SvREFCNT_dec(filter_sub); IoBOTTOM_GV(datasv) = NULL; } filter_del(S_run_user_filter); } if (err) croak_sv(err); if (status == 0 && read_from_cache) { /* If we read some data from the cache (and by getting here it implies that we emptied the cache) then we aren't yet at EOF, and mustn't report that to our caller. */ return 1; } return status; } /* * ex: set ts=8 sts=4 sw=4 et: */