Commit | Line | Data |
---|---|---|
a0d0e21e LW |
1 | /* pp_hot.c |
2 | * | |
1129b882 NC |
3 | * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, |
4 | * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by Larry Wall and others | |
a0d0e21e LW |
5 | * |
6 | * You may distribute under the terms of either the GNU General Public | |
7 | * License or the Artistic License, as specified in the README file. | |
8 | * | |
9 | */ | |
10 | ||
11 | /* | |
12 | * Then he heard Merry change the note, and up went the Horn-cry of Buckland, | |
13 | * shaking the air. | |
14 | * | |
4ac71550 TC |
15 | * Awake! Awake! Fear, Fire, Foes! Awake! |
16 | * Fire, Foes! Awake! | |
17 | * | |
18 | * [p.1007 of _The Lord of the Rings_, VI/viii: "The Scouring of the Shire"] | |
a0d0e21e LW |
19 | */ |
20 | ||
166f8a29 DM |
21 | /* This file contains 'hot' pp ("push/pop") functions that |
22 | * execute the opcodes that make up a perl program. A typical pp function | |
23 | * expects to find its arguments on the stack, and usually pushes its | |
24 | * results onto the stack, hence the 'pp' terminology. Each OP structure | |
25 | * contains a pointer to the relevant pp_foo() function. | |
26 | * | |
27 | * By 'hot', we mean common ops whose execution speed is critical. | |
28 | * By gathering them together into a single file, we encourage | |
29 | * CPU cache hits on hot code. Also it could be taken as a warning not to | |
30 | * change any code in this file unless you're sure it won't affect | |
31 | * performance. | |
32 | */ | |
33 | ||
a0d0e21e | 34 | #include "EXTERN.h" |
864dbfa3 | 35 | #define PERL_IN_PP_HOT_C |
a0d0e21e LW |
36 | #include "perl.h" |
37 | ||
38 | /* Hot code. */ | |
39 | ||
40 | PP(pp_const) | |
41 | { | |
39644a26 | 42 | dSP; |
996c9baa | 43 | XPUSHs(cSVOP_sv); |
a0d0e21e LW |
44 | RETURN; |
45 | } | |
46 | ||
47 | PP(pp_nextstate) | |
48 | { | |
533c011a | 49 | PL_curcop = (COP*)PL_op; |
a0d0e21e | 50 | TAINT_NOT; /* Each statement is presumed innocent */ |
4ebe6e95 | 51 | PL_stack_sp = PL_stack_base + CX_CUR()->blk_oldsp; |
a0d0e21e | 52 | FREETMPS; |
f410a211 | 53 | PERL_ASYNC_CHECK(); |
a0d0e21e LW |
54 | return NORMAL; |
55 | } | |
56 | ||
57 | PP(pp_gvsv) | |
58 | { | |
39644a26 | 59 | dSP; |
924508f0 | 60 | EXTEND(SP,1); |
5d9574c1 | 61 | if (UNLIKELY(PL_op->op_private & OPpLVAL_INTRO)) |
1d7c1841 | 62 | PUSHs(save_scalar(cGVOP_gv)); |
a0d0e21e | 63 | else |
c69033f2 | 64 | PUSHs(GvSVn(cGVOP_gv)); |
a0d0e21e LW |
65 | RETURN; |
66 | } | |
67 | ||
b1c05ba5 DM |
68 | |
69 | /* also used for: pp_lineseq() pp_regcmaybe() pp_scalar() pp_scope() */ | |
70 | ||
a0d0e21e LW |
71 | PP(pp_null) |
72 | { | |
73 | return NORMAL; | |
74 | } | |
75 | ||
3dd9d4e4 FC |
76 | /* This is sometimes called directly by pp_coreargs, pp_grepstart and |
77 | amagic_call. */ | |
a0d0e21e LW |
78 | PP(pp_pushmark) |
79 | { | |
3280af22 | 80 | PUSHMARK(PL_stack_sp); |
a0d0e21e LW |
81 | return NORMAL; |
82 | } | |
83 | ||
84 | PP(pp_stringify) | |
85 | { | |
20b7effb | 86 | dSP; dTARGET; |
4cc783ef DD |
87 | SV * const sv = TOPs; |
88 | SETs(TARG); | |
89 | sv_copypv(TARG, sv); | |
90 | SvSETMAGIC(TARG); | |
91 | /* no PUTBACK, SETs doesn't inc/dec SP */ | |
92 | return NORMAL; | |
a0d0e21e LW |
93 | } |
94 | ||
95 | PP(pp_gv) | |
96 | { | |
20b7effb | 97 | dSP; |
ad64d0ec | 98 | XPUSHs(MUTABLE_SV(cGVOP_gv)); |
a0d0e21e LW |
99 | RETURN; |
100 | } | |
101 | ||
b1c05ba5 DM |
102 | |
103 | /* also used for: pp_andassign() */ | |
104 | ||
a0d0e21e LW |
105 | PP(pp_and) |
106 | { | |
f410a211 | 107 | PERL_ASYNC_CHECK(); |
4cc783ef DD |
108 | { |
109 | /* SP is not used to remove a variable that is saved across the | |
110 | sv_2bool_flags call in SvTRUE_NN, if a RISC/CISC or low/high machine | |
111 | register or load/store vs direct mem ops macro is introduced, this | |
112 | should be a define block between direct PL_stack_sp and dSP operations, | |
113 | presently, using PL_stack_sp is bias towards CISC cpus */ | |
114 | SV * const sv = *PL_stack_sp; | |
115 | if (!SvTRUE_NN(sv)) | |
116 | return NORMAL; | |
117 | else { | |
118 | if (PL_op->op_type == OP_AND) | |
119 | --PL_stack_sp; | |
120 | return cLOGOP->op_other; | |
121 | } | |
a0d0e21e LW |
122 | } |
123 | } | |
124 | ||
125 | PP(pp_sassign) | |
126 | { | |
20b7effb | 127 | dSP; |
3e75a3c4 RU |
128 | /* sassign keeps its args in the optree traditionally backwards. |
129 | So we pop them differently. | |
130 | */ | |
131 | SV *left = POPs; SV *right = TOPs; | |
748a9306 | 132 | |
533c011a | 133 | if (PL_op->op_private & OPpASSIGN_BACKWARDS) { |
0bd48802 AL |
134 | SV * const temp = left; |
135 | left = right; right = temp; | |
a0d0e21e | 136 | } |
d48c660d DM |
137 | assert(TAINTING_get || !TAINT_get); |
138 | if (UNLIKELY(TAINT_get) && !SvTAINTED(right)) | |
a0d0e21e | 139 | TAINT_NOT; |
5d9574c1 DM |
140 | if (UNLIKELY(PL_op->op_private & OPpASSIGN_CV_TO_GV)) { |
141 | /* *foo =\&bar */ | |
3e75a3c4 | 142 | SV * const cv = SvRV(right); |
e26df76a | 143 | const U32 cv_type = SvTYPE(cv); |
3e75a3c4 | 144 | const bool is_gv = isGV_with_GP(left); |
6136c704 | 145 | const bool got_coderef = cv_type == SVt_PVCV || cv_type == SVt_PVFM; |
e26df76a NC |
146 | |
147 | if (!got_coderef) { | |
148 | assert(SvROK(cv)); | |
149 | } | |
150 | ||
3e75a3c4 RU |
151 | /* Can do the optimisation if left (LVALUE) is not a typeglob, |
152 | right (RVALUE) is a reference to something, and we're in void | |
e26df76a | 153 | context. */ |
13be902c | 154 | if (!got_coderef && !is_gv && GIMME_V == G_VOID) { |
e26df76a | 155 | /* Is the target symbol table currently empty? */ |
3e75a3c4 | 156 | GV * const gv = gv_fetchsv_nomg(left, GV_NOINIT, SVt_PVGV); |
bb112e5a | 157 | if (SvTYPE(gv) != SVt_PVGV && !SvOK(gv)) { |
e26df76a NC |
158 | /* Good. Create a new proxy constant subroutine in the target. |
159 | The gv becomes a(nother) reference to the constant. */ | |
160 | SV *const value = SvRV(cv); | |
161 | ||
ad64d0ec | 162 | SvUPGRADE(MUTABLE_SV(gv), SVt_IV); |
1ccdb730 | 163 | SvPCS_IMPORTED_on(gv); |
e26df76a | 164 | SvRV_set(gv, value); |
b37c2d43 | 165 | SvREFCNT_inc_simple_void(value); |
3e75a3c4 | 166 | SETs(left); |
e26df76a NC |
167 | RETURN; |
168 | } | |
169 | } | |
170 | ||
171 | /* Need to fix things up. */ | |
13be902c | 172 | if (!is_gv) { |
e26df76a | 173 | /* Need to fix GV. */ |
3e75a3c4 | 174 | left = MUTABLE_SV(gv_fetchsv_nomg(left,GV_ADD, SVt_PVGV)); |
e26df76a NC |
175 | } |
176 | ||
177 | if (!got_coderef) { | |
178 | /* We've been returned a constant rather than a full subroutine, | |
179 | but they expect a subroutine reference to apply. */ | |
53a42478 | 180 | if (SvROK(cv)) { |
d343c3ef | 181 | ENTER_with_name("sassign_coderef"); |
53a42478 NC |
182 | SvREFCNT_inc_void(SvRV(cv)); |
183 | /* newCONSTSUB takes a reference count on the passed in SV | |
184 | from us. We set the name to NULL, otherwise we get into | |
185 | all sorts of fun as the reference to our new sub is | |
186 | donated to the GV that we're about to assign to. | |
187 | */ | |
3e75a3c4 | 188 | SvRV_set(right, MUTABLE_SV(newCONSTSUB(GvSTASH(left), NULL, |
ad64d0ec | 189 | SvRV(cv)))); |
fc2b2dca | 190 | SvREFCNT_dec_NN(cv); |
d343c3ef | 191 | LEAVE_with_name("sassign_coderef"); |
53a42478 NC |
192 | } else { |
193 | /* What can happen for the corner case *{"BONK"} = \&{"BONK"}; | |
194 | is that | |
195 | First: ops for \&{"BONK"}; return us the constant in the | |
196 | symbol table | |
197 | Second: ops for *{"BONK"} cause that symbol table entry | |
198 | (and our reference to it) to be upgraded from RV | |
199 | to typeblob) | |
200 | Thirdly: We get here. cv is actually PVGV now, and its | |
201 | GvCV() is actually the subroutine we're looking for | |
202 | ||
203 | So change the reference so that it points to the subroutine | |
204 | of that typeglob, as that's what they were after all along. | |
205 | */ | |
159b6efe | 206 | GV *const upgraded = MUTABLE_GV(cv); |
53a42478 NC |
207 | CV *const source = GvCV(upgraded); |
208 | ||
209 | assert(source); | |
210 | assert(CvFLAGS(source) & CVf_CONST); | |
211 | ||
0ad694a7 | 212 | SvREFCNT_inc_simple_void_NN(source); |
fc2b2dca | 213 | SvREFCNT_dec_NN(upgraded); |
3e75a3c4 | 214 | SvRV_set(right, MUTABLE_SV(source)); |
53a42478 | 215 | } |
e26df76a | 216 | } |
53a42478 | 217 | |
e26df76a | 218 | } |
8fe85e3f | 219 | if ( |
5d9574c1 | 220 | UNLIKELY(SvTEMP(left)) && !SvSMAGICAL(left) && SvREFCNT(left) == 1 && |
3e75a3c4 | 221 | (!isGV_with_GP(left) || SvFAKE(left)) && ckWARN(WARN_MISC) |
8fe85e3f FC |
222 | ) |
223 | Perl_warner(aTHX_ | |
224 | packWARN(WARN_MISC), "Useless assignment to a temporary" | |
225 | ); | |
3e75a3c4 RU |
226 | SvSetMagicSV(left, right); |
227 | SETs(left); | |
a0d0e21e LW |
228 | RETURN; |
229 | } | |
230 | ||
231 | PP(pp_cond_expr) | |
232 | { | |
20b7effb | 233 | dSP; |
f410a211 | 234 | PERL_ASYNC_CHECK(); |
a0d0e21e | 235 | if (SvTRUEx(POPs)) |
1a67a97c | 236 | RETURNOP(cLOGOP->op_other); |
a0d0e21e | 237 | else |
1a67a97c | 238 | RETURNOP(cLOGOP->op_next); |
a0d0e21e LW |
239 | } |
240 | ||
241 | PP(pp_unstack) | |
242 | { | |
f5319de9 | 243 | PERL_CONTEXT *cx; |
8f3964af | 244 | PERL_ASYNC_CHECK(); |
a0d0e21e | 245 | TAINT_NOT; /* Each statement is presumed innocent */ |
4ebe6e95 | 246 | cx = CX_CUR(); |
f5319de9 | 247 | PL_stack_sp = PL_stack_base + cx->blk_oldsp; |
a0d0e21e | 248 | FREETMPS; |
eae48c89 | 249 | if (!(PL_op->op_flags & OPf_SPECIAL)) { |
93661e56 | 250 | assert(CxTYPE(cx) == CXt_BLOCK || CxTYPE_is_LOOP(cx)); |
dfe0f39b | 251 | CX_LEAVE_SCOPE(cx); |
eae48c89 | 252 | } |
a0d0e21e LW |
253 | return NORMAL; |
254 | } | |
255 | ||
a0d0e21e LW |
256 | PP(pp_concat) |
257 | { | |
20b7effb | 258 | dSP; dATARGET; tryAMAGICbin_MG(concat_amg, AMGf_assign); |
748a9306 LW |
259 | { |
260 | dPOPTOPssrl; | |
8d6d96c1 HS |
261 | bool lbyte; |
262 | STRLEN rlen; | |
d4c19fe8 | 263 | const char *rpv = NULL; |
a6b599c7 | 264 | bool rbyte = FALSE; |
a9c4fd4e | 265 | bool rcopied = FALSE; |
8d6d96c1 | 266 | |
6f1401dc DM |
267 | if (TARG == right && right != left) { /* $r = $l.$r */ |
268 | rpv = SvPV_nomg_const(right, rlen); | |
c75ab21a | 269 | rbyte = !DO_UTF8(right); |
59cd0e26 | 270 | right = newSVpvn_flags(rpv, rlen, SVs_TEMP); |
349d4f2f | 271 | rpv = SvPV_const(right, rlen); /* no point setting UTF-8 here */ |
db79b45b | 272 | rcopied = TRUE; |
8d6d96c1 | 273 | } |
7889fe52 | 274 | |
89734059 | 275 | if (TARG != left) { /* not $l .= $r */ |
a9c4fd4e | 276 | STRLEN llen; |
6f1401dc | 277 | const char* const lpv = SvPV_nomg_const(left, llen); |
90f5826e | 278 | lbyte = !DO_UTF8(left); |
8d6d96c1 HS |
279 | sv_setpvn(TARG, lpv, llen); |
280 | if (!lbyte) | |
281 | SvUTF8_on(TARG); | |
282 | else | |
283 | SvUTF8_off(TARG); | |
284 | } | |
18ea7bf2 S |
285 | else { /* $l .= $r and left == TARG */ |
286 | if (!SvOK(left)) { | |
89734059 | 287 | if (left == right && ckWARN(WARN_UNINITIALIZED)) /* $l .= $l */ |
c75ab21a | 288 | report_uninit(right); |
76f68e9b | 289 | sv_setpvs(left, ""); |
c75ab21a | 290 | } |
18ea7bf2 S |
291 | else { |
292 | SvPV_force_nomg_nolen(left); | |
293 | } | |
583a5589 | 294 | lbyte = !DO_UTF8(left); |
90f5826e | 295 | if (IN_BYTES) |
18ea7bf2 | 296 | SvUTF8_off(left); |
8d6d96c1 | 297 | } |
a12c0f56 | 298 | |
c75ab21a | 299 | if (!rcopied) { |
6f1401dc | 300 | rpv = SvPV_nomg_const(right, rlen); |
c75ab21a RH |
301 | rbyte = !DO_UTF8(right); |
302 | } | |
8d6d96c1 HS |
303 | if (lbyte != rbyte) { |
304 | if (lbyte) | |
305 | sv_utf8_upgrade_nomg(TARG); | |
306 | else { | |
db79b45b | 307 | if (!rcopied) |
59cd0e26 | 308 | right = newSVpvn_flags(rpv, rlen, SVs_TEMP); |
8d6d96c1 | 309 | sv_utf8_upgrade_nomg(right); |
6f1401dc | 310 | rpv = SvPV_nomg_const(right, rlen); |
69b47968 | 311 | } |
a0d0e21e | 312 | } |
8d6d96c1 | 313 | sv_catpvn_nomg(TARG, rpv, rlen); |
43ebc500 | 314 | |
a0d0e21e LW |
315 | SETTARG; |
316 | RETURN; | |
748a9306 | 317 | } |
a0d0e21e LW |
318 | } |
319 | ||
d5524600 DM |
320 | /* push the elements of av onto the stack. |
321 | * XXX Note that padav has similar code but without the mg_get(). | |
322 | * I suspect that the mg_get is no longer needed, but while padav | |
323 | * differs, it can't share this function */ | |
324 | ||
f9ae8fb6 | 325 | STATIC void |
d5524600 DM |
326 | S_pushav(pTHX_ AV* const av) |
327 | { | |
328 | dSP; | |
c70927a6 | 329 | const SSize_t maxarg = AvFILL(av) + 1; |
d5524600 | 330 | EXTEND(SP, maxarg); |
5d9574c1 | 331 | if (UNLIKELY(SvRMAGICAL(av))) { |
c70927a6 FC |
332 | PADOFFSET i; |
333 | for (i=0; i < (PADOFFSET)maxarg; i++) { | |
d5524600 DM |
334 | SV ** const svp = av_fetch(av, i, FALSE); |
335 | /* See note in pp_helem, and bug id #27839 */ | |
336 | SP[i+1] = svp | |
337 | ? SvGMAGICAL(*svp) ? (mg_get(*svp), *svp) : *svp | |
338 | : &PL_sv_undef; | |
339 | } | |
340 | } | |
341 | else { | |
c70927a6 FC |
342 | PADOFFSET i; |
343 | for (i=0; i < (PADOFFSET)maxarg; i++) { | |
ce0d59fd | 344 | SV * const sv = AvARRAY(av)[i]; |
5d9574c1 | 345 | SP[i+1] = LIKELY(sv) ? sv : &PL_sv_undef; |
ce0d59fd | 346 | } |
d5524600 DM |
347 | } |
348 | SP += maxarg; | |
349 | PUTBACK; | |
350 | } | |
351 | ||
352 | ||
a7fd8ef6 DM |
353 | /* ($lex1,@lex2,...) or my ($lex1,@lex2,...) */ |
354 | ||
355 | PP(pp_padrange) | |
356 | { | |
20b7effb | 357 | dSP; |
a7fd8ef6 DM |
358 | PADOFFSET base = PL_op->op_targ; |
359 | int count = (int)(PL_op->op_private) & OPpPADRANGE_COUNTMASK; | |
360 | int i; | |
d5524600 DM |
361 | if (PL_op->op_flags & OPf_SPECIAL) { |
362 | /* fake the RHS of my ($x,$y,..) = @_ */ | |
363 | PUSHMARK(SP); | |
364 | S_pushav(aTHX_ GvAVn(PL_defgv)); | |
365 | SPAGAIN; | |
366 | } | |
367 | ||
a7fd8ef6 DM |
368 | /* note, this is only skipped for compile-time-known void cxt */ |
369 | if ((PL_op->op_flags & OPf_WANT) != OPf_WANT_VOID) { | |
370 | EXTEND(SP, count); | |
371 | PUSHMARK(SP); | |
372 | for (i = 0; i <count; i++) | |
373 | *++SP = PAD_SV(base+i); | |
374 | } | |
375 | if (PL_op->op_private & OPpLVAL_INTRO) { | |
4e09461c DM |
376 | SV **svp = &(PAD_SVl(base)); |
377 | const UV payload = (UV)( | |
378 | (base << (OPpPADRANGE_COUNTSHIFT + SAVE_TIGHT_SHIFT)) | |
379 | | (count << SAVE_TIGHT_SHIFT) | |
380 | | SAVEt_CLEARPADRANGE); | |
6d59e610 | 381 | STATIC_ASSERT_STMT(OPpPADRANGE_COUNTMASK + 1 == (1 << OPpPADRANGE_COUNTSHIFT)); |
4e09461c | 382 | assert((payload >> (OPpPADRANGE_COUNTSHIFT+SAVE_TIGHT_SHIFT)) == base); |
a3444cc5 DM |
383 | { |
384 | dSS_ADD; | |
385 | SS_ADD_UV(payload); | |
386 | SS_ADD_END(1); | |
387 | } | |
4e09461c | 388 | |
a7fd8ef6 | 389 | for (i = 0; i <count; i++) |
4e09461c | 390 | SvPADSTALE_off(*svp++); /* mark lexical as active */ |
a7fd8ef6 DM |
391 | } |
392 | RETURN; | |
393 | } | |
394 | ||
395 | ||
a0d0e21e LW |
396 | PP(pp_padsv) |
397 | { | |
20b7effb | 398 | dSP; |
6c28b496 DD |
399 | EXTEND(SP, 1); |
400 | { | |
401 | OP * const op = PL_op; | |
402 | /* access PL_curpad once */ | |
403 | SV ** const padentry = &(PAD_SVl(op->op_targ)); | |
404 | { | |
405 | dTARG; | |
406 | TARG = *padentry; | |
407 | PUSHs(TARG); | |
408 | PUTBACK; /* no pop/push after this, TOPs ok */ | |
8ec5e241 | 409 | } |
6c28b496 DD |
410 | if (op->op_flags & OPf_MOD) { |
411 | if (op->op_private & OPpLVAL_INTRO) | |
412 | if (!(op->op_private & OPpPAD_STATE)) | |
413 | save_clearsv(padentry); | |
414 | if (op->op_private & OPpDEREF) { | |
8f90a16d FC |
415 | /* TOPs is equivalent to TARG here. Using TOPs (SP) rather |
416 | than TARG reduces the scope of TARG, so it does not | |
417 | span the call to save_clearsv, resulting in smaller | |
418 | machine code. */ | |
6c28b496 DD |
419 | TOPs = vivify_ref(TOPs, op->op_private & OPpDEREF); |
420 | } | |
421 | } | |
422 | return op->op_next; | |
4633a7c4 | 423 | } |
a0d0e21e LW |
424 | } |
425 | ||
426 | PP(pp_readline) | |
427 | { | |
30901a8a FC |
428 | dSP; |
429 | if (TOPs) { | |
430 | SvGETMAGIC(TOPs); | |
fc99edcf | 431 | tryAMAGICunTARGETlist(iter_amg, 0); |
30901a8a FC |
432 | PL_last_in_gv = MUTABLE_GV(*PL_stack_sp--); |
433 | } | |
434 | else PL_last_in_gv = PL_argvgv, PL_stack_sp--; | |
6e592b3a BM |
435 | if (!isGV_with_GP(PL_last_in_gv)) { |
436 | if (SvROK(PL_last_in_gv) && isGV_with_GP(SvRV(PL_last_in_gv))) | |
159b6efe | 437 | PL_last_in_gv = MUTABLE_GV(SvRV(PL_last_in_gv)); |
8efb3254 | 438 | else { |
f5284f61 | 439 | dSP; |
ad64d0ec | 440 | XPUSHs(MUTABLE_SV(PL_last_in_gv)); |
f5284f61 | 441 | PUTBACK; |
897d3989 | 442 | Perl_pp_rv2gv(aTHX); |
159b6efe | 443 | PL_last_in_gv = MUTABLE_GV(*PL_stack_sp--); |
84ee769f FC |
444 | if (PL_last_in_gv == (GV *)&PL_sv_undef) |
445 | PL_last_in_gv = NULL; | |
446 | else | |
447 | assert(isGV_with_GP(PL_last_in_gv)); | |
f5284f61 IZ |
448 | } |
449 | } | |
a0d0e21e LW |
450 | return do_readline(); |
451 | } | |
452 | ||
453 | PP(pp_eq) | |
454 | { | |
20b7effb | 455 | dSP; |
33efebe6 DM |
456 | SV *left, *right; |
457 | ||
a42d0242 | 458 | tryAMAGICbin_MG(eq_amg, AMGf_set|AMGf_numeric); |
33efebe6 DM |
459 | right = POPs; |
460 | left = TOPs; | |
461 | SETs(boolSV( | |
462 | (SvIOK_notUV(left) && SvIOK_notUV(right)) | |
463 | ? (SvIVX(left) == SvIVX(right)) | |
464 | : ( do_ncmp(left, right) == 0) | |
465 | )); | |
466 | RETURN; | |
a0d0e21e LW |
467 | } |
468 | ||
b1c05ba5 | 469 | |
4c2c3128 | 470 | /* also used for: pp_i_preinc() */ |
b1c05ba5 | 471 | |
a0d0e21e LW |
472 | PP(pp_preinc) |
473 | { | |
4c2c3128 DM |
474 | SV *sv = *PL_stack_sp; |
475 | ||
476 | if (LIKELY(((sv->sv_flags & | |
477 | (SVf_THINKFIRST|SVs_GMG|SVf_IVisUV| | |
478 | SVf_IOK|SVf_NOK|SVf_POK|SVp_NOK|SVp_POK|SVf_ROK)) | |
479 | == SVf_IOK)) | |
480 | && SvIVX(sv) != IV_MAX) | |
481 | { | |
482 | SvIV_set(sv, SvIVX(sv) + 1); | |
483 | } | |
484 | else /* Do all the PERL_PRESERVE_IVUV and hard cases in sv_inc */ | |
485 | sv_inc(sv); | |
486 | SvSETMAGIC(sv); | |
487 | return NORMAL; | |
488 | } | |
489 | ||
490 | ||
491 | /* also used for: pp_i_predec() */ | |
492 | ||
493 | PP(pp_predec) | |
494 | { | |
495 | SV *sv = *PL_stack_sp; | |
496 | ||
497 | if (LIKELY(((sv->sv_flags & | |
498 | (SVf_THINKFIRST|SVs_GMG|SVf_IVisUV| | |
499 | SVf_IOK|SVf_NOK|SVf_POK|SVp_NOK|SVp_POK|SVf_ROK)) | |
500 | == SVf_IOK)) | |
501 | && SvIVX(sv) != IV_MIN) | |
55497cff | 502 | { |
4c2c3128 | 503 | SvIV_set(sv, SvIVX(sv) - 1); |
748a9306 | 504 | } |
4c2c3128 DM |
505 | else /* Do all the PERL_PRESERVE_IVUV and hard cases in sv_dec */ |
506 | sv_dec(sv); | |
507 | SvSETMAGIC(sv); | |
a0d0e21e LW |
508 | return NORMAL; |
509 | } | |
510 | ||
b1c05ba5 DM |
511 | |
512 | /* also used for: pp_orassign() */ | |
513 | ||
a0d0e21e LW |
514 | PP(pp_or) |
515 | { | |
20b7effb | 516 | dSP; |
f410a211 | 517 | PERL_ASYNC_CHECK(); |
a0d0e21e LW |
518 | if (SvTRUE(TOPs)) |
519 | RETURN; | |
520 | else { | |
c960fc3b SP |
521 | if (PL_op->op_type == OP_OR) |
522 | --SP; | |
a0d0e21e LW |
523 | RETURNOP(cLOGOP->op_other); |
524 | } | |
525 | } | |
526 | ||
b1c05ba5 DM |
527 | |
528 | /* also used for: pp_dor() pp_dorassign() */ | |
529 | ||
25a55bd7 | 530 | PP(pp_defined) |
c963b151 | 531 | { |
20b7effb | 532 | dSP; |
eb578fdb | 533 | SV* sv; |
6136c704 | 534 | bool defined; |
25a55bd7 | 535 | const int op_type = PL_op->op_type; |
ea5195b7 | 536 | const bool is_dor = (op_type == OP_DOR || op_type == OP_DORASSIGN); |
c963b151 | 537 | |
6136c704 | 538 | if (is_dor) { |
f410a211 | 539 | PERL_ASYNC_CHECK(); |
25a55bd7 | 540 | sv = TOPs; |
5d9574c1 | 541 | if (UNLIKELY(!sv || !SvANY(sv))) { |
2bd49cfc NC |
542 | if (op_type == OP_DOR) |
543 | --SP; | |
25a55bd7 SP |
544 | RETURNOP(cLOGOP->op_other); |
545 | } | |
b7c44293 RGS |
546 | } |
547 | else { | |
548 | /* OP_DEFINED */ | |
25a55bd7 | 549 | sv = POPs; |
5d9574c1 | 550 | if (UNLIKELY(!sv || !SvANY(sv))) |
25a55bd7 | 551 | RETPUSHNO; |
b7c44293 | 552 | } |
25a55bd7 | 553 | |
6136c704 | 554 | defined = FALSE; |
c963b151 BD |
555 | switch (SvTYPE(sv)) { |
556 | case SVt_PVAV: | |
557 | if (AvMAX(sv) >= 0 || SvGMAGICAL(sv) || (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied))) | |
25a55bd7 | 558 | defined = TRUE; |
c963b151 BD |
559 | break; |
560 | case SVt_PVHV: | |
561 | if (HvARRAY(sv) || SvGMAGICAL(sv) || (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied))) | |
25a55bd7 | 562 | defined = TRUE; |
c963b151 BD |
563 | break; |
564 | case SVt_PVCV: | |
565 | if (CvROOT(sv) || CvXSUB(sv)) | |
25a55bd7 | 566 | defined = TRUE; |
c963b151 BD |
567 | break; |
568 | default: | |
5b295bef | 569 | SvGETMAGIC(sv); |
c963b151 | 570 | if (SvOK(sv)) |
25a55bd7 | 571 | defined = TRUE; |
6136c704 | 572 | break; |
c963b151 | 573 | } |
6136c704 AL |
574 | |
575 | if (is_dor) { | |
c960fc3b SP |
576 | if(defined) |
577 | RETURN; | |
578 | if(op_type == OP_DOR) | |
579 | --SP; | |
25a55bd7 | 580 | RETURNOP(cLOGOP->op_other); |
25a55bd7 | 581 | } |
d9aa96a4 SP |
582 | /* assuming OP_DEFINED */ |
583 | if(defined) | |
584 | RETPUSHYES; | |
585 | RETPUSHNO; | |
c963b151 BD |
586 | } |
587 | ||
230ee21f DM |
588 | |
589 | ||
a0d0e21e LW |
590 | PP(pp_add) |
591 | { | |
20b7effb | 592 | dSP; dATARGET; bool useleft; SV *svl, *svr; |
230ee21f | 593 | |
6f1401dc DM |
594 | tryAMAGICbin_MG(add_amg, AMGf_assign|AMGf_numeric); |
595 | svr = TOPs; | |
596 | svl = TOPm1s; | |
597 | ||
28e5dec8 | 598 | #ifdef PERL_PRESERVE_IVUV |
230ee21f DM |
599 | |
600 | /* special-case some simple common cases */ | |
601 | if (!((svl->sv_flags|svr->sv_flags) & (SVf_IVisUV|SVs_GMG))) { | |
602 | IV il, ir; | |
603 | U32 flags = (svl->sv_flags & svr->sv_flags); | |
604 | if (flags & SVf_IOK) { | |
605 | /* both args are simple IVs */ | |
606 | UV topl, topr; | |
607 | il = SvIVX(svl); | |
608 | ir = SvIVX(svr); | |
609 | do_iv: | |
610 | topl = ((UV)il) >> (UVSIZE * 8 - 2); | |
611 | topr = ((UV)ir) >> (UVSIZE * 8 - 2); | |
612 | ||
613 | /* if both are in a range that can't under/overflow, do a | |
614 | * simple integer add: if the top of both numbers | |
615 | * are 00 or 11, then it's safe */ | |
616 | if (!( ((topl+1) | (topr+1)) & 2)) { | |
617 | SP--; | |
618 | TARGi(il + ir, 0); /* args not GMG, so can't be tainted */ | |
619 | SETs(TARG); | |
620 | RETURN; | |
621 | } | |
622 | goto generic; | |
623 | } | |
624 | else if (flags & SVf_NOK) { | |
625 | /* both args are NVs */ | |
626 | NV nl = SvNVX(svl); | |
627 | NV nr = SvNVX(svr); | |
628 | ||
3336af0b DD |
629 | if ( |
630 | #if defined(NAN_COMPARE_BROKEN) && defined(Perl_isnan) | |
631 | !Perl_isnan(nl) && nl == (NV)(il = (IV)nl) | |
632 | && !Perl_isnan(nr) && nr == (NV)(ir = (IV)nr) | |
633 | #else | |
634 | nl == (NV)(il = (IV)nl) && nr == (NV)(ir = (IV)nr) | |
635 | #endif | |
636 | ) | |
230ee21f DM |
637 | /* nothing was lost by converting to IVs */ |
638 | goto do_iv; | |
639 | SP--; | |
640 | TARGn(nl + nr, 0); /* args not GMG, so can't be tainted */ | |
641 | SETs(TARG); | |
642 | RETURN; | |
643 | } | |
644 | } | |
645 | ||
646 | generic: | |
647 | ||
648 | useleft = USE_LEFT(svl); | |
28e5dec8 JH |
649 | /* We must see if we can perform the addition with integers if possible, |
650 | as the integer code detects overflow while the NV code doesn't. | |
651 | If either argument hasn't had a numeric conversion yet attempt to get | |
652 | the IV. It's important to do this now, rather than just assuming that | |
653 | it's not IOK as a PV of "9223372036854775806" may not take well to NV | |
654 | addition, and an SV which is NOK, NV=6.0 ought to be coerced to | |
655 | integer in case the second argument is IV=9223372036854775806 | |
656 | We can (now) rely on sv_2iv to do the right thing, only setting the | |
657 | public IOK flag if the value in the NV (or PV) slot is truly integer. | |
658 | ||
659 | A side effect is that this also aggressively prefers integer maths over | |
7dca457a NC |
660 | fp maths for integer values. |
661 | ||
a00b5bd3 | 662 | How to detect overflow? |
7dca457a NC |
663 | |
664 | C 99 section 6.2.6.1 says | |
665 | ||
666 | The range of nonnegative values of a signed integer type is a subrange | |
667 | of the corresponding unsigned integer type, and the representation of | |
668 | the same value in each type is the same. A computation involving | |
669 | unsigned operands can never overflow, because a result that cannot be | |
670 | represented by the resulting unsigned integer type is reduced modulo | |
671 | the number that is one greater than the largest value that can be | |
672 | represented by the resulting type. | |
673 | ||
674 | (the 9th paragraph) | |
675 | ||
676 | which I read as "unsigned ints wrap." | |
677 | ||
678 | signed integer overflow seems to be classed as "exception condition" | |
679 | ||
680 | If an exceptional condition occurs during the evaluation of an | |
681 | expression (that is, if the result is not mathematically defined or not | |
682 | in the range of representable values for its type), the behavior is | |
683 | undefined. | |
684 | ||
685 | (6.5, the 5th paragraph) | |
686 | ||
687 | I had assumed that on 2s complement machines signed arithmetic would | |
688 | wrap, hence coded pp_add and pp_subtract on the assumption that | |
689 | everything perl builds on would be happy. After much wailing and | |
690 | gnashing of teeth it would seem that irix64 knows its ANSI spec well, | |
691 | knows that it doesn't need to, and doesn't. Bah. Anyway, the all- | |
692 | unsigned code below is actually shorter than the old code. :-) | |
693 | */ | |
694 | ||
01f91bf2 | 695 | if (SvIV_please_nomg(svr)) { |
28e5dec8 JH |
696 | /* Unless the left argument is integer in range we are going to have to |
697 | use NV maths. Hence only attempt to coerce the right argument if | |
698 | we know the left is integer. */ | |
eb578fdb | 699 | UV auv = 0; |
9c5ffd7c | 700 | bool auvok = FALSE; |
7dca457a NC |
701 | bool a_valid = 0; |
702 | ||
28e5dec8 | 703 | if (!useleft) { |
7dca457a NC |
704 | auv = 0; |
705 | a_valid = auvok = 1; | |
706 | /* left operand is undef, treat as zero. + 0 is identity, | |
707 | Could SETi or SETu right now, but space optimise by not adding | |
708 | lots of code to speed up what is probably a rarish case. */ | |
709 | } else { | |
710 | /* Left operand is defined, so is it IV? */ | |
01f91bf2 | 711 | if (SvIV_please_nomg(svl)) { |
800401ee JH |
712 | if ((auvok = SvUOK(svl))) |
713 | auv = SvUVX(svl); | |
7dca457a | 714 | else { |
eb578fdb | 715 | const IV aiv = SvIVX(svl); |
7dca457a NC |
716 | if (aiv >= 0) { |
717 | auv = aiv; | |
718 | auvok = 1; /* Now acting as a sign flag. */ | |
53e2bfb7 DM |
719 | } else { |
720 | auv = (aiv == IV_MIN) ? (UV)aiv : (UV)(-aiv); | |
7dca457a NC |
721 | } |
722 | } | |
723 | a_valid = 1; | |
28e5dec8 JH |
724 | } |
725 | } | |
7dca457a NC |
726 | if (a_valid) { |
727 | bool result_good = 0; | |
728 | UV result; | |
eb578fdb | 729 | UV buv; |
800401ee | 730 | bool buvok = SvUOK(svr); |
a00b5bd3 | 731 | |
7dca457a | 732 | if (buvok) |
800401ee | 733 | buv = SvUVX(svr); |
7dca457a | 734 | else { |
eb578fdb | 735 | const IV biv = SvIVX(svr); |
7dca457a NC |
736 | if (biv >= 0) { |
737 | buv = biv; | |
738 | buvok = 1; | |
739 | } else | |
53e2bfb7 | 740 | buv = (biv == IV_MIN) ? (UV)biv : (UV)(-biv); |
7dca457a NC |
741 | } |
742 | /* ?uvok if value is >= 0. basically, flagged as UV if it's +ve, | |
602f51c4 | 743 | else "IV" now, independent of how it came in. |
7dca457a NC |
744 | if a, b represents positive, A, B negative, a maps to -A etc |
745 | a + b => (a + b) | |
746 | A + b => -(a - b) | |
747 | a + B => (a - b) | |
748 | A + B => -(a + b) | |
749 | all UV maths. negate result if A negative. | |
750 | add if signs same, subtract if signs differ. */ | |
751 | ||
752 | if (auvok ^ buvok) { | |
753 | /* Signs differ. */ | |
754 | if (auv >= buv) { | |
755 | result = auv - buv; | |
756 | /* Must get smaller */ | |
757 | if (result <= auv) | |
758 | result_good = 1; | |
759 | } else { | |
760 | result = buv - auv; | |
761 | if (result <= buv) { | |
762 | /* result really should be -(auv-buv). as its negation | |
763 | of true value, need to swap our result flag */ | |
764 | auvok = !auvok; | |
765 | result_good = 1; | |
28e5dec8 JH |
766 | } |
767 | } | |
7dca457a NC |
768 | } else { |
769 | /* Signs same */ | |
770 | result = auv + buv; | |
771 | if (result >= auv) | |
772 | result_good = 1; | |
773 | } | |
774 | if (result_good) { | |
775 | SP--; | |
776 | if (auvok) | |
28e5dec8 | 777 | SETu( result ); |
7dca457a NC |
778 | else { |
779 | /* Negate result */ | |
780 | if (result <= (UV)IV_MIN) | |
53e2bfb7 DM |
781 | SETi(result == (UV)IV_MIN |
782 | ? IV_MIN : -(IV)result); | |
7dca457a NC |
783 | else { |
784 | /* result valid, but out of range for IV. */ | |
785 | SETn( -(NV)result ); | |
28e5dec8 JH |
786 | } |
787 | } | |
7dca457a NC |
788 | RETURN; |
789 | } /* Overflow, drop through to NVs. */ | |
28e5dec8 JH |
790 | } |
791 | } | |
230ee21f DM |
792 | |
793 | #else | |
794 | useleft = USE_LEFT(svl); | |
28e5dec8 | 795 | #endif |
230ee21f | 796 | |
a0d0e21e | 797 | { |
6f1401dc | 798 | NV value = SvNV_nomg(svr); |
4efa5a16 | 799 | (void)POPs; |
28e5dec8 JH |
800 | if (!useleft) { |
801 | /* left operand is undef, treat as zero. + 0.0 is identity. */ | |
802 | SETn(value); | |
803 | RETURN; | |
804 | } | |
6f1401dc | 805 | SETn( value + SvNV_nomg(svl) ); |
28e5dec8 | 806 | RETURN; |
a0d0e21e LW |
807 | } |
808 | } | |
809 | ||
b1c05ba5 DM |
810 | |
811 | /* also used for: pp_aelemfast_lex() */ | |
812 | ||
a0d0e21e LW |
813 | PP(pp_aelemfast) |
814 | { | |
20b7effb | 815 | dSP; |
93bad3fd | 816 | AV * const av = PL_op->op_type == OP_AELEMFAST_LEX |
8f878375 | 817 | ? MUTABLE_AV(PAD_SV(PL_op->op_targ)) : GvAVn(cGVOP_gv); |
a3b680e6 | 818 | const U32 lval = PL_op->op_flags & OPf_MOD; |
b024352e | 819 | SV** const svp = av_fetch(av, (I8)PL_op->op_private, lval); |
3280af22 | 820 | SV *sv = (svp ? *svp : &PL_sv_undef); |
b024352e DM |
821 | |
822 | if (UNLIKELY(!svp && lval)) | |
823 | DIE(aTHX_ PL_no_aelem, (int)(I8)PL_op->op_private); | |
824 | ||
6ff81951 | 825 | EXTEND(SP, 1); |
39cf747a | 826 | if (!lval && SvRMAGICAL(av) && SvGMAGICAL(sv)) /* see note in pp_helem() */ |
fd69380d | 827 | mg_get(sv); |
be6c24e0 | 828 | PUSHs(sv); |
a0d0e21e LW |
829 | RETURN; |
830 | } | |
831 | ||
832 | PP(pp_join) | |
833 | { | |
20b7effb | 834 | dSP; dMARK; dTARGET; |
a0d0e21e LW |
835 | MARK++; |
836 | do_join(TARG, *MARK, MARK, SP); | |
837 | SP = MARK; | |
838 | SETs(TARG); | |
839 | RETURN; | |
840 | } | |
841 | ||
842 | PP(pp_pushre) | |
843 | { | |
20b7effb | 844 | dSP; |
44a8e56a | 845 | #ifdef DEBUGGING |
846 | /* | |
847 | * We ass_u_me that LvTARGOFF() comes first, and that two STRLENs | |
848 | * will be enough to hold an OP*. | |
849 | */ | |
c4420975 | 850 | SV* const sv = sv_newmortal(); |
44a8e56a | 851 | sv_upgrade(sv, SVt_PVLV); |
852 | LvTYPE(sv) = '/'; | |
533c011a | 853 | Copy(&PL_op, &LvTARGOFF(sv), 1, OP*); |
44a8e56a | 854 | XPUSHs(sv); |
855 | #else | |
ad64d0ec | 856 | XPUSHs(MUTABLE_SV(PL_op)); |
44a8e56a | 857 | #endif |
a0d0e21e LW |
858 | RETURN; |
859 | } | |
860 | ||
861 | /* Oversized hot code. */ | |
862 | ||
b1c05ba5 DM |
863 | /* also used for: pp_say() */ |
864 | ||
a0d0e21e LW |
865 | PP(pp_print) |
866 | { | |
20b7effb | 867 | dSP; dMARK; dORIGMARK; |
eb578fdb | 868 | PerlIO *fp; |
236988e4 | 869 | MAGIC *mg; |
159b6efe NC |
870 | GV * const gv |
871 | = (PL_op->op_flags & OPf_STACKED) ? MUTABLE_GV(*++MARK) : PL_defoutgv; | |
9c9f25b8 | 872 | IO *io = GvIO(gv); |
5b468f54 | 873 | |
9c9f25b8 | 874 | if (io |
ad64d0ec | 875 | && (mg = SvTIED_mg((const SV *)io, PERL_MAGIC_tiedscalar))) |
5b468f54 | 876 | { |
01bb7c6d | 877 | had_magic: |
68dc0745 | 878 | if (MARK == ORIGMARK) { |
1c846c1f | 879 | /* If using default handle then we need to make space to |
a60c0954 NIS |
880 | * pass object as 1st arg, so move other args up ... |
881 | */ | |
4352c267 | 882 | MEXTEND(SP, 1); |
68dc0745 | 883 | ++MARK; |
884 | Move(MARK, MARK + 1, (SP - MARK) + 1, SV*); | |
885 | ++SP; | |
886 | } | |
3e0cb5de | 887 | return Perl_tied_method(aTHX_ SV_CONST(PRINT), mark - 1, MUTABLE_SV(io), |
94bc412f NC |
888 | mg, |
889 | (G_SCALAR | TIED_METHOD_ARGUMENTS_ON_STACK | |
890 | | (PL_op->op_type == OP_SAY | |
891 | ? TIED_METHOD_SAY : 0)), sp - mark); | |
236988e4 | 892 | } |
9c9f25b8 | 893 | if (!io) { |
68b590d9 | 894 | if ( gv && GvEGVx(gv) && (io = GvIO(GvEGV(gv))) |
ad64d0ec | 895 | && (mg = SvTIED_mg((const SV *)io, PERL_MAGIC_tiedscalar))) |
01bb7c6d | 896 | goto had_magic; |
51087808 | 897 | report_evil_fh(gv); |
93189314 | 898 | SETERRNO(EBADF,RMS_IFI); |
a0d0e21e LW |
899 | goto just_say_no; |
900 | } | |
901 | else if (!(fp = IoOFP(io))) { | |
7716c5c5 NC |
902 | if (IoIFP(io)) |
903 | report_wrongway_fh(gv, '<'); | |
51087808 | 904 | else |
7716c5c5 | 905 | report_evil_fh(gv); |
93189314 | 906 | SETERRNO(EBADF,IoIFP(io)?RMS_FAC:RMS_IFI); |
a0d0e21e LW |
907 | goto just_say_no; |
908 | } | |
909 | else { | |
e23d9e2f | 910 | SV * const ofs = GvSV(PL_ofsgv); /* $, */ |
a0d0e21e | 911 | MARK++; |
e23d9e2f | 912 | if (ofs && (SvGMAGICAL(ofs) || SvOK(ofs))) { |
a0d0e21e LW |
913 | while (MARK <= SP) { |
914 | if (!do_print(*MARK, fp)) | |
915 | break; | |
916 | MARK++; | |
917 | if (MARK <= SP) { | |
e23d9e2f CS |
918 | /* don't use 'ofs' here - it may be invalidated by magic callbacks */ |
919 | if (!do_print(GvSV(PL_ofsgv), fp)) { | |
a0d0e21e LW |
920 | MARK--; |
921 | break; | |
922 | } | |
923 | } | |
924 | } | |
925 | } | |
926 | else { | |
927 | while (MARK <= SP) { | |
928 | if (!do_print(*MARK, fp)) | |
929 | break; | |
930 | MARK++; | |
931 | } | |
932 | } | |
933 | if (MARK <= SP) | |
934 | goto just_say_no; | |
935 | else { | |
cfc4a7da GA |
936 | if (PL_op->op_type == OP_SAY) { |
937 | if (PerlIO_write(fp, "\n", 1) == 0 || PerlIO_error(fp)) | |
938 | goto just_say_no; | |
939 | } | |
940 | else if (PL_ors_sv && SvOK(PL_ors_sv)) | |
7889fe52 | 941 | if (!do_print(PL_ors_sv, fp)) /* $\ */ |
a0d0e21e LW |
942 | goto just_say_no; |
943 | ||
944 | if (IoFLAGS(io) & IOf_FLUSH) | |
760ac839 | 945 | if (PerlIO_flush(fp) == EOF) |
a0d0e21e LW |
946 | goto just_say_no; |
947 | } | |
948 | } | |
949 | SP = ORIGMARK; | |
e52fd6f4 | 950 | XPUSHs(&PL_sv_yes); |
a0d0e21e LW |
951 | RETURN; |
952 | ||
953 | just_say_no: | |
954 | SP = ORIGMARK; | |
e52fd6f4 | 955 | XPUSHs(&PL_sv_undef); |
a0d0e21e LW |
956 | RETURN; |
957 | } | |
958 | ||
b1c05ba5 DM |
959 | |
960 | /* also used for: pp_rv2hv() */ | |
bdaf10a5 | 961 | /* also called directly by pp_lvavref */ |
b1c05ba5 | 962 | |
a0d0e21e LW |
963 | PP(pp_rv2av) |
964 | { | |
20b7effb | 965 | dSP; dTOPss; |
1c23e2bd | 966 | const U8 gimme = GIMME_V; |
13c59d41 MH |
967 | static const char an_array[] = "an ARRAY"; |
968 | static const char a_hash[] = "a HASH"; | |
bdaf10a5 FC |
969 | const bool is_pp_rv2av = PL_op->op_type == OP_RV2AV |
970 | || PL_op->op_type == OP_LVAVREF; | |
d83b45b8 | 971 | const svtype type = is_pp_rv2av ? SVt_PVAV : SVt_PVHV; |
a0d0e21e | 972 | |
9026059d | 973 | SvGETMAGIC(sv); |
a0d0e21e | 974 | if (SvROK(sv)) { |
5d9574c1 | 975 | if (UNLIKELY(SvAMAGIC(sv))) { |
93d7320b | 976 | sv = amagic_deref_call(sv, is_pp_rv2av ? to_av_amg : to_hv_amg); |
93d7320b | 977 | } |
17ab7946 | 978 | sv = SvRV(sv); |
5d9574c1 | 979 | if (UNLIKELY(SvTYPE(sv) != type)) |
dcbac5bb | 980 | /* diag_listed_as: Not an ARRAY reference */ |
13c59d41 | 981 | DIE(aTHX_ "Not %s reference", is_pp_rv2av ? an_array : a_hash); |
5d9574c1 DM |
982 | else if (UNLIKELY(PL_op->op_flags & OPf_MOD |
983 | && PL_op->op_private & OPpLVAL_INTRO)) | |
3da99855 | 984 | Perl_croak(aTHX_ "%s", PL_no_localize_ref); |
a0d0e21e | 985 | } |
5d9574c1 | 986 | else if (UNLIKELY(SvTYPE(sv) != type)) { |
67955e0c | 987 | GV *gv; |
1c846c1f | 988 | |
6e592b3a | 989 | if (!isGV_with_GP(sv)) { |
13c59d41 | 990 | gv = Perl_softref2xv(aTHX_ sv, is_pp_rv2av ? an_array : a_hash, |
dc3c76f8 NC |
991 | type, &sp); |
992 | if (!gv) | |
993 | RETURN; | |
35cd451c GS |
994 | } |
995 | else { | |
159b6efe | 996 | gv = MUTABLE_GV(sv); |
a0d0e21e | 997 | } |
ad64d0ec | 998 | sv = is_pp_rv2av ? MUTABLE_SV(GvAVn(gv)) : MUTABLE_SV(GvHVn(gv)); |
533c011a | 999 | if (PL_op->op_private & OPpLVAL_INTRO) |
ad64d0ec | 1000 | sv = is_pp_rv2av ? MUTABLE_SV(save_ary(gv)) : MUTABLE_SV(save_hash(gv)); |
9f527363 FC |
1001 | } |
1002 | if (PL_op->op_flags & OPf_REF) { | |
17ab7946 | 1003 | SETs(sv); |
a0d0e21e | 1004 | RETURN; |
9f527363 | 1005 | } |
5d9574c1 | 1006 | else if (UNLIKELY(PL_op->op_private & OPpMAYBE_LVSUB)) { |
40c94d11 FC |
1007 | const I32 flags = is_lvalue_sub(); |
1008 | if (flags && !(flags & OPpENTERSUB_INARGS)) { | |
cde874ca | 1009 | if (gimme != G_ARRAY) |
042560a6 | 1010 | goto croak_cant_return; |
17ab7946 | 1011 | SETs(sv); |
78f9721b | 1012 | RETURN; |
40c94d11 | 1013 | } |
a0d0e21e LW |
1014 | } |
1015 | ||
17ab7946 | 1016 | if (is_pp_rv2av) { |
502c6561 | 1017 | AV *const av = MUTABLE_AV(sv); |
636fe681 | 1018 | /* The guts of pp_rv2av */ |
96913b52 | 1019 | if (gimme == G_ARRAY) { |
d5524600 DM |
1020 | SP--; |
1021 | PUTBACK; | |
1022 | S_pushav(aTHX_ av); | |
1023 | SPAGAIN; | |
1c846c1f | 1024 | } |
96913b52 VP |
1025 | else if (gimme == G_SCALAR) { |
1026 | dTARGET; | |
c70927a6 | 1027 | const SSize_t maxarg = AvFILL(av) + 1; |
96913b52 | 1028 | SETi(maxarg); |
93965878 | 1029 | } |
17ab7946 NC |
1030 | } else { |
1031 | /* The guts of pp_rv2hv */ | |
96913b52 VP |
1032 | if (gimme == G_ARRAY) { /* array wanted */ |
1033 | *PL_stack_sp = sv; | |
981b7185 | 1034 | return Perl_do_kv(aTHX); |
96913b52 | 1035 | } |
c8fe3bdf | 1036 | else if ((PL_op->op_private & OPpTRUEBOOL |
adc42c31 | 1037 | || ( PL_op->op_private & OPpMAYBE_TRUEBOOL |
c8fe3bdf FC |
1038 | && block_gimme() == G_VOID )) |
1039 | && (!SvRMAGICAL(sv) || !mg_find(sv, PERL_MAGIC_tied))) | |
1040 | SETs(HvUSEDKEYS(sv) ? &PL_sv_yes : sv_2mortal(newSViv(0))); | |
96913b52 | 1041 | else if (gimme == G_SCALAR) { |
1a8bdda9 | 1042 | dTARG; |
96913b52 | 1043 | TARG = Perl_hv_scalar(aTHX_ MUTABLE_HV(sv)); |
96913b52 VP |
1044 | SETTARG; |
1045 | } | |
17ab7946 | 1046 | } |
be85d344 | 1047 | RETURN; |
042560a6 NC |
1048 | |
1049 | croak_cant_return: | |
1050 | Perl_croak(aTHX_ "Can't return %s to lvalue scalar context", | |
1051 | is_pp_rv2av ? "array" : "hash"); | |
77e217c6 | 1052 | RETURN; |
a0d0e21e LW |
1053 | } |
1054 | ||
10c8fecd | 1055 | STATIC void |
fb8f4cf8 | 1056 | S_do_oddball(pTHX_ SV **oddkey, SV **firstkey) |
10c8fecd | 1057 | { |
7918f24d NC |
1058 | PERL_ARGS_ASSERT_DO_ODDBALL; |
1059 | ||
fb8f4cf8 | 1060 | if (*oddkey) { |
6d822dc4 | 1061 | if (ckWARN(WARN_MISC)) { |
a3b680e6 | 1062 | const char *err; |
fb8f4cf8 RZ |
1063 | if (oddkey == firstkey && |
1064 | SvROK(*oddkey) && | |
1065 | (SvTYPE(SvRV(*oddkey)) == SVt_PVAV || | |
1066 | SvTYPE(SvRV(*oddkey)) == SVt_PVHV)) | |
10c8fecd | 1067 | { |
a3b680e6 | 1068 | err = "Reference found where even-sized list expected"; |
10c8fecd GS |
1069 | } |
1070 | else | |
a3b680e6 | 1071 | err = "Odd number of elements in hash assignment"; |
f1f66076 | 1072 | Perl_warner(aTHX_ packWARN(WARN_MISC), "%s", err); |
10c8fecd | 1073 | } |
6d822dc4 | 1074 | |
10c8fecd GS |
1075 | } |
1076 | } | |
1077 | ||
a5f48505 DM |
1078 | |
1079 | /* Do a mark and sweep with the SVf_BREAK flag to detect elements which | |
1080 | * are common to both the LHS and RHS of an aassign, and replace them | |
1081 | * with copies. All these copies are made before the actual list assign is | |
1082 | * done. | |
1083 | * | |
1084 | * For example in ($a,$b) = ($b,$a), assigning the value of the first RHS | |
1085 | * element ($b) to the first LH element ($a), modifies $a; when the | |
1086 | * second assignment is done, the second RH element now has the wrong | |
1087 | * value. So we initially replace the RHS with ($b, mortalcopy($a)). | |
1088 | * Note that we don't need to make a mortal copy of $b. | |
1089 | * | |
1090 | * The algorithm below works by, for every RHS element, mark the | |
1091 | * corresponding LHS target element with SVf_BREAK. Then if the RHS | |
1092 | * element is found with SVf_BREAK set, it means it would have been | |
1093 | * modified, so make a copy. | |
1094 | * Note that by scanning both LHS and RHS in lockstep, we avoid | |
1095 | * unnecessary copies (like $b above) compared with a naive | |
1096 | * "mark all LHS; copy all marked RHS; unmark all LHS". | |
1097 | * | |
1098 | * If the LHS element is a 'my' declaration' and has a refcount of 1, then | |
1099 | * it can't be common and can be skipped. | |
ebc643ce DM |
1100 | * |
1101 | * On DEBUGGING builds it takes an extra boolean, fake. If true, it means | |
1102 | * that we thought we didn't need to call S_aassign_copy_common(), but we | |
1103 | * have anyway for sanity checking. If we find we need to copy, then panic. | |
a5f48505 DM |
1104 | */ |
1105 | ||
1106 | PERL_STATIC_INLINE void | |
1107 | S_aassign_copy_common(pTHX_ SV **firstlelem, SV **lastlelem, | |
ebc643ce DM |
1108 | SV **firstrelem, SV **lastrelem |
1109 | #ifdef DEBUGGING | |
1110 | , bool fake | |
1111 | #endif | |
1112 | ) | |
a5f48505 DM |
1113 | { |
1114 | dVAR; | |
1115 | SV **relem; | |
1116 | SV **lelem; | |
1117 | SSize_t lcount = lastlelem - firstlelem + 1; | |
1118 | bool marked = FALSE; /* have we marked any LHS with SVf_BREAK ? */ | |
1119 | bool const do_rc1 = cBOOL(PL_op->op_private & OPpASSIGN_COMMON_RC1); | |
beb08a1e | 1120 | bool copy_all = FALSE; |
a5f48505 DM |
1121 | |
1122 | assert(!PL_in_clean_all); /* SVf_BREAK not already in use */ | |
1123 | assert(firstlelem < lastlelem); /* at least 2 LH elements */ | |
1124 | assert(firstrelem < lastrelem); /* at least 2 RH elements */ | |
1125 | ||
ebc643ce DM |
1126 | |
1127 | lelem = firstlelem; | |
a5f48505 DM |
1128 | /* we never have to copy the first RH element; it can't be corrupted |
1129 | * by assigning something to the corresponding first LH element. | |
1130 | * So this scan does in a loop: mark LHS[N]; test RHS[N+1] | |
1131 | */ | |
ebc643ce | 1132 | relem = firstrelem + 1; |
a5f48505 DM |
1133 | |
1134 | for (; relem <= lastrelem; relem++) { | |
1135 | SV *svr; | |
1136 | ||
1137 | /* mark next LH element */ | |
1138 | ||
1139 | if (--lcount >= 0) { | |
1140 | SV *svl = *lelem++; | |
1141 | ||
1142 | if (UNLIKELY(!svl)) {/* skip AV alias marker */ | |
1143 | assert (lelem <= lastlelem); | |
1144 | svl = *lelem++; | |
1145 | lcount--; | |
1146 | } | |
1147 | ||
1148 | assert(svl); | |
beb08a1e TC |
1149 | if (SvSMAGICAL(svl)) { |
1150 | copy_all = TRUE; | |
1151 | } | |
a5f48505 DM |
1152 | if (SvTYPE(svl) == SVt_PVAV || SvTYPE(svl) == SVt_PVHV) { |
1153 | if (!marked) | |
1154 | return; | |
1155 | /* this LH element will consume all further args; | |
1156 | * no need to mark any further LH elements (if any). | |
1157 | * But we still need to scan any remaining RHS elements; | |
1158 | * set lcount negative to distinguish from lcount == 0, | |
1159 | * so the loop condition continues being true | |
1160 | */ | |
1161 | lcount = -1; | |
1162 | lelem--; /* no need to unmark this element */ | |
1163 | } | |
1164 | else if (!(do_rc1 && SvREFCNT(svl) == 1) && svl != &PL_sv_undef) { | |
1165 | assert(!SvIMMORTAL(svl)); | |
1166 | SvFLAGS(svl) |= SVf_BREAK; | |
1167 | marked = TRUE; | |
1168 | } | |
1169 | else if (!marked) { | |
1170 | /* don't check RH element if no SVf_BREAK flags set yet */ | |
1171 | if (!lcount) | |
1172 | break; | |
1173 | continue; | |
1174 | } | |
1175 | } | |
1176 | ||
1177 | /* see if corresponding RH element needs copying */ | |
1178 | ||
1179 | assert(marked); | |
1180 | svr = *relem; | |
1181 | assert(svr); | |
1182 | ||
5c1db569 | 1183 | if (UNLIKELY(SvFLAGS(svr) & (SVf_BREAK|SVs_GMG) || copy_all)) { |
a5f48505 | 1184 | |
ebc643ce DM |
1185 | #ifdef DEBUGGING |
1186 | if (fake) { | |
9ae0115f | 1187 | /* op_dump(PL_op); */ |
ebc643ce DM |
1188 | Perl_croak(aTHX_ |
1189 | "panic: aassign skipped needed copy of common RH elem %" | |
1190 | UVuf, (UV)(relem - firstrelem)); | |
1191 | } | |
1192 | #endif | |
1193 | ||
a5f48505 DM |
1194 | TAINT_NOT; /* Each item is independent */ |
1195 | ||
1196 | /* Dear TODO test in t/op/sort.t, I love you. | |
1197 | (It's relying on a panic, not a "semi-panic" from newSVsv() | |
1198 | and then an assertion failure below.) */ | |
1199 | if (UNLIKELY(SvIS_FREED(svr))) { | |
1200 | Perl_croak(aTHX_ "panic: attempt to copy freed scalar %p", | |
1201 | (void*)svr); | |
1202 | } | |
1203 | /* avoid break flag while copying; otherwise COW etc | |
1204 | * disabled... */ | |
1205 | SvFLAGS(svr) &= ~SVf_BREAK; | |
1206 | /* Not newSVsv(), as it does not allow copy-on-write, | |
8c1e192f DM |
1207 | resulting in wasteful copies. |
1208 | Also, we use SV_NOSTEAL in case the SV is used more than | |
1209 | once, e.g. (...) = (f())[0,0] | |
1210 | Where the same SV appears twice on the RHS without a ref | |
1211 | count bump. (Although I suspect that the SV won't be | |
1212 | stealable here anyway - DAPM). | |
1213 | */ | |
a5f48505 DM |
1214 | *relem = sv_mortalcopy_flags(svr, |
1215 | SV_GMAGIC|SV_DO_COW_SVSETSV|SV_NOSTEAL); | |
1216 | /* ... but restore afterwards in case it's needed again, | |
1217 | * e.g. ($a,$b,$c) = (1,$a,$a) | |
1218 | */ | |
1219 | SvFLAGS(svr) |= SVf_BREAK; | |
1220 | } | |
1221 | ||
1222 | if (!lcount) | |
1223 | break; | |
1224 | } | |
1225 | ||
1226 | if (!marked) | |
1227 | return; | |
1228 | ||
1229 | /*unmark LHS */ | |
1230 | ||
1231 | while (lelem > firstlelem) { | |
1232 | SV * const svl = *(--lelem); | |
1233 | if (svl) | |
1234 | SvFLAGS(svl) &= ~SVf_BREAK; | |
1235 | } | |
1236 | } | |
1237 | ||
1238 | ||
1239 | ||
a0d0e21e LW |
1240 | PP(pp_aassign) |
1241 | { | |
27da23d5 | 1242 | dVAR; dSP; |
3280af22 NIS |
1243 | SV **lastlelem = PL_stack_sp; |
1244 | SV **lastrelem = PL_stack_base + POPMARK; | |
1245 | SV **firstrelem = PL_stack_base + POPMARK + 1; | |
a0d0e21e LW |
1246 | SV **firstlelem = lastrelem + 1; |
1247 | ||
eb578fdb KW |
1248 | SV **relem; |
1249 | SV **lelem; | |
a0d0e21e | 1250 | |
eb578fdb KW |
1251 | SV *sv; |
1252 | AV *ary; | |
a0d0e21e | 1253 | |
1c23e2bd | 1254 | U8 gimme; |
a0d0e21e | 1255 | HV *hash; |
c70927a6 | 1256 | SSize_t i; |
a0d0e21e | 1257 | int magic; |
a5f48505 | 1258 | U32 lval; |
a68090fe DM |
1259 | /* PL_delaymagic is restored by JUMPENV_POP on dieing, so we |
1260 | * only need to save locally, not on the save stack */ | |
1261 | U16 old_delaymagic = PL_delaymagic; | |
ebc643ce DM |
1262 | #ifdef DEBUGGING |
1263 | bool fake = 0; | |
1264 | #endif | |
5637b936 | 1265 | |
3280af22 | 1266 | PL_delaymagic = DM_DELAY; /* catch simultaneous items */ |
a0d0e21e LW |
1267 | |
1268 | /* If there's a common identifier on both sides we have to take | |
1269 | * special care that assigning the identifier on the left doesn't | |
1270 | * clobber a value on the right that's used later in the list. | |
1271 | */ | |
acdea6f0 | 1272 | |
beb08a1e TC |
1273 | /* at least 2 LH and RH elements, or commonality isn't an issue */ |
1274 | if (firstlelem < lastlelem && firstrelem < lastrelem) { | |
5c1db569 TC |
1275 | for (relem = firstrelem+1; relem <= lastrelem; relem++) { |
1276 | if (SvGMAGICAL(*relem)) | |
1277 | goto do_scan; | |
1278 | } | |
beb08a1e TC |
1279 | for (lelem = firstlelem; lelem <= lastlelem; lelem++) { |
1280 | if (*lelem && SvSMAGICAL(*lelem)) | |
1281 | goto do_scan; | |
a5f48505 | 1282 | } |
beb08a1e TC |
1283 | if ( PL_op->op_private & (OPpASSIGN_COMMON_SCALAR|OPpASSIGN_COMMON_RC1) ) { |
1284 | if (PL_op->op_private & OPpASSIGN_COMMON_RC1) { | |
1285 | /* skip the scan if all scalars have a ref count of 1 */ | |
1286 | for (lelem = firstlelem; lelem <= lastlelem; lelem++) { | |
1287 | sv = *lelem; | |
1288 | if (!sv || SvREFCNT(sv) == 1) | |
1289 | continue; | |
1290 | if (SvTYPE(sv) != SVt_PVAV && SvTYPE(sv) != SVt_PVAV) | |
1291 | goto do_scan; | |
1292 | break; | |
1293 | } | |
1294 | } | |
1295 | else { | |
1296 | do_scan: | |
1297 | S_aassign_copy_common(aTHX_ | |
1298 | firstlelem, lastlelem, firstrelem, lastrelem | |
ebc643ce | 1299 | #ifdef DEBUGGING |
beb08a1e | 1300 | , fake |
ebc643ce | 1301 | #endif |
beb08a1e TC |
1302 | ); |
1303 | } | |
a5f48505 | 1304 | } |
a0d0e21e | 1305 | } |
ebc643ce DM |
1306 | #ifdef DEBUGGING |
1307 | else { | |
1308 | /* on debugging builds, do the scan even if we've concluded we | |
1309 | * don't need to, then panic if we find commonality. Note that the | |
1310 | * scanner assumes at least 2 elements */ | |
1311 | if (firstlelem < lastlelem && firstrelem < lastrelem) { | |
1312 | fake = 1; | |
1313 | goto do_scan; | |
1314 | } | |
1315 | } | |
1316 | #endif | |
a0d0e21e | 1317 | |
a5f48505 DM |
1318 | gimme = GIMME_V; |
1319 | lval = (gimme == G_ARRAY) ? (PL_op->op_flags & OPf_MOD || LVRET) : 0; | |
1320 | ||
a0d0e21e LW |
1321 | relem = firstrelem; |
1322 | lelem = firstlelem; | |
4608196e RGS |
1323 | ary = NULL; |
1324 | hash = NULL; | |
10c8fecd | 1325 | |
5d9574c1 | 1326 | while (LIKELY(lelem <= lastlelem)) { |
bdaf10a5 | 1327 | bool alias = FALSE; |
bbce6d69 | 1328 | TAINT_NOT; /* Each item stands on its own, taintwise. */ |
a0d0e21e | 1329 | sv = *lelem++; |
bdaf10a5 FC |
1330 | if (UNLIKELY(!sv)) { |
1331 | alias = TRUE; | |
1332 | sv = *lelem++; | |
1333 | ASSUME(SvTYPE(sv) == SVt_PVAV); | |
1334 | } | |
a0d0e21e | 1335 | switch (SvTYPE(sv)) { |
a5f48505 DM |
1336 | case SVt_PVAV: { |
1337 | bool already_copied = FALSE; | |
60edcf09 | 1338 | ary = MUTABLE_AV(sv); |
748a9306 | 1339 | magic = SvMAGICAL(ary) != 0; |
60edcf09 FC |
1340 | ENTER; |
1341 | SAVEFREESV(SvREFCNT_inc_simple_NN(sv)); | |
a5f48505 DM |
1342 | |
1343 | /* We need to clear ary. The is a danger that if we do this, | |
1344 | * elements on the RHS may be prematurely freed, e.g. | |
1345 | * @a = ($a[0]); | |
1346 | * In the case of possible commonality, make a copy of each | |
1347 | * RHS SV *before* clearing the array, and add a reference | |
1348 | * from the tmps stack, so that it doesn't leak on death. | |
1349 | * Otherwise, make a copy of each RHS SV only as we're storing | |
1350 | * it into the array - that way we don't have to worry about | |
1351 | * it being leaked if we die, but don't incur the cost of | |
1352 | * mortalising everything. | |
1353 | */ | |
1354 | ||
1355 | if ( (PL_op->op_private & OPpASSIGN_COMMON_AGG) | |
1356 | && (relem <= lastrelem) | |
1357 | && (magic || AvFILL(ary) != -1)) | |
1358 | { | |
1359 | SV **svp; | |
1360 | EXTEND_MORTAL(lastrelem - relem + 1); | |
1361 | for (svp = relem; svp <= lastrelem; svp++) { | |
8c1e192f | 1362 | /* see comment in S_aassign_copy_common about SV_NOSTEAL */ |
a5f48505 DM |
1363 | *svp = sv_mortalcopy_flags(*svp, |
1364 | SV_GMAGIC|SV_DO_COW_SVSETSV|SV_NOSTEAL); | |
1365 | TAINT_NOT; | |
1366 | } | |
1367 | already_copied = TRUE; | |
1368 | } | |
1369 | ||
1370 | av_clear(ary); | |
6768377c DM |
1371 | if (relem <= lastrelem) |
1372 | av_extend(ary, lastrelem - relem); | |
1373 | ||
a0d0e21e LW |
1374 | i = 0; |
1375 | while (relem <= lastrelem) { /* gobble up all the rest */ | |
5117ca91 | 1376 | SV **didstore; |
bdaf10a5 | 1377 | if (LIKELY(!alias)) { |
a5f48505 DM |
1378 | if (already_copied) |
1379 | sv = *relem; | |
1380 | else { | |
1381 | if (LIKELY(*relem)) | |
1382 | /* before newSV, in case it dies */ | |
1383 | SvGETMAGIC(*relem); | |
1384 | sv = newSV(0); | |
8c1e192f DM |
1385 | /* see comment in S_aassign_copy_common about |
1386 | * SV_NOSTEAL */ | |
1387 | sv_setsv_flags(sv, *relem, | |
1388 | (SV_DO_COW_SVSETSV|SV_NOSTEAL)); | |
a5f48505 DM |
1389 | *relem = sv; |
1390 | } | |
bdaf10a5 FC |
1391 | } |
1392 | else { | |
a5f48505 DM |
1393 | if (!already_copied) |
1394 | SvGETMAGIC(*relem); | |
bdaf10a5 FC |
1395 | if (!SvROK(*relem)) |
1396 | DIE(aTHX_ "Assigned value is not a reference"); | |
1397 | if (SvTYPE(SvRV(*relem)) > SVt_PVLV) | |
1398 | /* diag_listed_as: Assigned value is not %s reference */ | |
1399 | DIE(aTHX_ | |
1400 | "Assigned value is not a SCALAR reference"); | |
a5f48505 | 1401 | if (lval && !already_copied) |
bdaf10a5 FC |
1402 | *relem = sv_mortalcopy(*relem); |
1403 | /* XXX else check for weak refs? */ | |
0ad694a7 | 1404 | sv = SvREFCNT_inc_NN(SvRV(*relem)); |
bdaf10a5 FC |
1405 | } |
1406 | relem++; | |
a5f48505 | 1407 | if (already_copied) |
0ad694a7 | 1408 | SvREFCNT_inc_simple_void_NN(sv); /* undo mortal free */ |
5117ca91 GS |
1409 | didstore = av_store(ary,i++,sv); |
1410 | if (magic) { | |
18024492 FC |
1411 | if (!didstore) |
1412 | sv_2mortal(sv); | |
8ef24240 | 1413 | if (SvSMAGICAL(sv)) |
fb73857a | 1414 | mg_set(sv); |
5117ca91 | 1415 | } |
bbce6d69 | 1416 | TAINT_NOT; |
a0d0e21e | 1417 | } |
5d9574c1 | 1418 | if (UNLIKELY(PL_delaymagic & DM_ARRAY_ISA)) |
ad64d0ec | 1419 | SvSETMAGIC(MUTABLE_SV(ary)); |
60edcf09 | 1420 | LEAVE; |
a0d0e21e | 1421 | break; |
a5f48505 DM |
1422 | } |
1423 | ||
10c8fecd | 1424 | case SVt_PVHV: { /* normal hash */ |
a0d0e21e | 1425 | SV *tmpstr; |
1c4ea384 RZ |
1426 | int odd; |
1427 | int duplicates = 0; | |
45960564 | 1428 | SV** topelem = relem; |
1c4ea384 | 1429 | SV **firsthashrelem = relem; |
a5f48505 | 1430 | bool already_copied = FALSE; |
a0d0e21e | 1431 | |
60edcf09 | 1432 | hash = MUTABLE_HV(sv); |
748a9306 | 1433 | magic = SvMAGICAL(hash) != 0; |
1c4ea384 RZ |
1434 | |
1435 | odd = ((lastrelem - firsthashrelem)&1)? 0 : 1; | |
5d9574c1 | 1436 | if (UNLIKELY(odd)) { |
fb8f4cf8 | 1437 | do_oddball(lastrelem, firsthashrelem); |
1d2b3927 HS |
1438 | /* we have firstlelem to reuse, it's not needed anymore |
1439 | */ | |
1c4ea384 RZ |
1440 | *(lastrelem+1) = &PL_sv_undef; |
1441 | } | |
1442 | ||
60edcf09 FC |
1443 | ENTER; |
1444 | SAVEFREESV(SvREFCNT_inc_simple_NN(sv)); | |
a5f48505 DM |
1445 | |
1446 | /* We need to clear hash. The is a danger that if we do this, | |
1447 | * elements on the RHS may be prematurely freed, e.g. | |
1448 | * %h = (foo => $h{bar}); | |
1449 | * In the case of possible commonality, make a copy of each | |
1450 | * RHS SV *before* clearing the hash, and add a reference | |
1451 | * from the tmps stack, so that it doesn't leak on death. | |
1452 | */ | |
1453 | ||
1454 | if ( (PL_op->op_private & OPpASSIGN_COMMON_AGG) | |
1455 | && (relem <= lastrelem) | |
1456 | && (magic || HvUSEDKEYS(hash))) | |
1457 | { | |
1458 | SV **svp; | |
1459 | EXTEND_MORTAL(lastrelem - relem + 1); | |
1460 | for (svp = relem; svp <= lastrelem; svp++) { | |
1461 | *svp = sv_mortalcopy_flags(*svp, | |
1462 | SV_GMAGIC|SV_DO_COW_SVSETSV|SV_NOSTEAL); | |
1463 | TAINT_NOT; | |
1464 | } | |
1465 | already_copied = TRUE; | |
1466 | } | |
1467 | ||
a0d0e21e | 1468 | hv_clear(hash); |
a5f48505 | 1469 | |
5d9574c1 | 1470 | while (LIKELY(relem < lastrelem+odd)) { /* gobble up all the rest */ |
5117ca91 | 1471 | HE *didstore; |
1c4ea384 | 1472 | assert(*relem); |
632b9d6f FC |
1473 | /* Copy the key if aassign is called in lvalue context, |
1474 | to avoid having the next op modify our rhs. Copy | |
1475 | it also if it is gmagical, lest it make the | |
1476 | hv_store_ent call below croak, leaking the value. */ | |
a5f48505 | 1477 | sv = (lval || SvGMAGICAL(*relem)) && !already_copied |
632b9d6f FC |
1478 | ? sv_mortalcopy(*relem) |
1479 | : *relem; | |
45960564 | 1480 | relem++; |
1c4ea384 | 1481 | assert(*relem); |
a5f48505 DM |
1482 | if (already_copied) |
1483 | tmpstr = *relem++; | |
1484 | else { | |
1485 | SvGETMAGIC(*relem); | |
1486 | tmpstr = newSV(0); | |
1487 | sv_setsv_nomg(tmpstr,*relem++); /* value */ | |
1488 | } | |
1489 | ||
a88bf2bc | 1490 | if (gimme == G_ARRAY) { |
45960564 DM |
1491 | if (hv_exists_ent(hash, sv, 0)) |
1492 | /* key overwrites an existing entry */ | |
1493 | duplicates += 2; | |
a88bf2bc | 1494 | else { |
45960564 | 1495 | /* copy element back: possibly to an earlier |
1d2b3927 HS |
1496 | * stack location if we encountered dups earlier, |
1497 | * possibly to a later stack location if odd */ | |
45960564 DM |
1498 | *topelem++ = sv; |
1499 | *topelem++ = tmpstr; | |
1500 | } | |
1501 | } | |
a5f48505 | 1502 | if (already_copied) |
0ad694a7 | 1503 | SvREFCNT_inc_simple_void_NN(tmpstr); /* undo mortal free */ |
5117ca91 | 1504 | didstore = hv_store_ent(hash,sv,tmpstr,0); |
632b9d6f FC |
1505 | if (magic) { |
1506 | if (!didstore) sv_2mortal(tmpstr); | |
1507 | SvSETMAGIC(tmpstr); | |
1508 | } | |
bbce6d69 | 1509 | TAINT_NOT; |
8e07c86e | 1510 | } |
60edcf09 | 1511 | LEAVE; |
1c4ea384 RZ |
1512 | if (duplicates && gimme == G_ARRAY) { |
1513 | /* at this point we have removed the duplicate key/value | |
1514 | * pairs from the stack, but the remaining values may be | |
1515 | * wrong; i.e. with (a 1 a 2 b 3) on the stack we've removed | |
1516 | * the (a 2), but the stack now probably contains | |
1517 | * (a <freed> b 3), because { hv_save(a,1); hv_save(a,2) } | |
1518 | * obliterates the earlier key. So refresh all values. */ | |
1519 | lastrelem -= duplicates; | |
1520 | relem = firsthashrelem; | |
1521 | while (relem < lastrelem+odd) { | |
1522 | HE *he; | |
1523 | he = hv_fetch_ent(hash, *relem++, 0, 0); | |
1524 | *relem++ = (he ? HeVAL(he) : &PL_sv_undef); | |
1525 | } | |
1526 | } | |
1527 | if (odd && gimme == G_ARRAY) lastrelem++; | |
a0d0e21e LW |
1528 | } |
1529 | break; | |
1530 | default: | |
6fc92669 GS |
1531 | if (SvIMMORTAL(sv)) { |
1532 | if (relem <= lastrelem) | |
1533 | relem++; | |
1534 | break; | |
a0d0e21e LW |
1535 | } |
1536 | if (relem <= lastrelem) { | |
5d9574c1 | 1537 | if (UNLIKELY( |
1c70fb82 FC |
1538 | SvTEMP(sv) && !SvSMAGICAL(sv) && SvREFCNT(sv) == 1 && |
1539 | (!isGV_with_GP(sv) || SvFAKE(sv)) && ckWARN(WARN_MISC) | |
5d9574c1 | 1540 | )) |
1c70fb82 FC |
1541 | Perl_warner(aTHX_ |
1542 | packWARN(WARN_MISC), | |
1543 | "Useless assignment to a temporary" | |
1544 | ); | |
a0d0e21e LW |
1545 | sv_setsv(sv, *relem); |
1546 | *(relem++) = sv; | |
1547 | } | |
1548 | else | |
3280af22 | 1549 | sv_setsv(sv, &PL_sv_undef); |
8ef24240 | 1550 | SvSETMAGIC(sv); |
a0d0e21e LW |
1551 | break; |
1552 | } | |
1553 | } | |
5d9574c1 | 1554 | if (UNLIKELY(PL_delaymagic & ~DM_DELAY)) { |
985213f2 | 1555 | /* Will be used to set PL_tainting below */ |
dfff4baf BF |
1556 | Uid_t tmp_uid = PerlProc_getuid(); |
1557 | Uid_t tmp_euid = PerlProc_geteuid(); | |
1558 | Gid_t tmp_gid = PerlProc_getgid(); | |
1559 | Gid_t tmp_egid = PerlProc_getegid(); | |
985213f2 | 1560 | |
b469f1e0 | 1561 | /* XXX $> et al currently silently ignore failures */ |
3280af22 | 1562 | if (PL_delaymagic & DM_UID) { |
a0d0e21e | 1563 | #ifdef HAS_SETRESUID |
b469f1e0 JH |
1564 | PERL_UNUSED_RESULT( |
1565 | setresuid((PL_delaymagic & DM_RUID) ? PL_delaymagic_uid : (Uid_t)-1, | |
1566 | (PL_delaymagic & DM_EUID) ? PL_delaymagic_euid : (Uid_t)-1, | |
1567 | (Uid_t)-1)); | |
56febc5e AD |
1568 | #else |
1569 | # ifdef HAS_SETREUID | |
b469f1e0 JH |
1570 | PERL_UNUSED_RESULT( |
1571 | setreuid((PL_delaymagic & DM_RUID) ? PL_delaymagic_uid : (Uid_t)-1, | |
1572 | (PL_delaymagic & DM_EUID) ? PL_delaymagic_euid : (Uid_t)-1)); | |
56febc5e AD |
1573 | # else |
1574 | # ifdef HAS_SETRUID | |
b28d0864 | 1575 | if ((PL_delaymagic & DM_UID) == DM_RUID) { |
b469f1e0 | 1576 | PERL_UNUSED_RESULT(setruid(PL_delaymagic_uid)); |
b28d0864 | 1577 | PL_delaymagic &= ~DM_RUID; |
a0d0e21e | 1578 | } |
56febc5e AD |
1579 | # endif /* HAS_SETRUID */ |
1580 | # ifdef HAS_SETEUID | |
b28d0864 | 1581 | if ((PL_delaymagic & DM_UID) == DM_EUID) { |
b469f1e0 | 1582 | PERL_UNUSED_RESULT(seteuid(PL_delaymagic_euid)); |
b28d0864 | 1583 | PL_delaymagic &= ~DM_EUID; |
a0d0e21e | 1584 | } |
56febc5e | 1585 | # endif /* HAS_SETEUID */ |
b28d0864 | 1586 | if (PL_delaymagic & DM_UID) { |
985213f2 | 1587 | if (PL_delaymagic_uid != PL_delaymagic_euid) |
cea2e8a9 | 1588 | DIE(aTHX_ "No setreuid available"); |
b469f1e0 | 1589 | PERL_UNUSED_RESULT(PerlProc_setuid(PL_delaymagic_uid)); |
a0d0e21e | 1590 | } |
56febc5e AD |
1591 | # endif /* HAS_SETREUID */ |
1592 | #endif /* HAS_SETRESUID */ | |
04783dc7 | 1593 | |
985213f2 AB |
1594 | tmp_uid = PerlProc_getuid(); |
1595 | tmp_euid = PerlProc_geteuid(); | |
a0d0e21e | 1596 | } |
b469f1e0 | 1597 | /* XXX $> et al currently silently ignore failures */ |
3280af22 | 1598 | if (PL_delaymagic & DM_GID) { |
a0d0e21e | 1599 | #ifdef HAS_SETRESGID |
b469f1e0 JH |
1600 | PERL_UNUSED_RESULT( |
1601 | setresgid((PL_delaymagic & DM_RGID) ? PL_delaymagic_gid : (Gid_t)-1, | |
1602 | (PL_delaymagic & DM_EGID) ? PL_delaymagic_egid : (Gid_t)-1, | |
1603 | (Gid_t)-1)); | |
56febc5e AD |
1604 | #else |
1605 | # ifdef HAS_SETREGID | |
b469f1e0 JH |
1606 | PERL_UNUSED_RESULT( |
1607 | setregid((PL_delaymagic & DM_RGID) ? PL_delaymagic_gid : (Gid_t)-1, | |
1608 | (PL_delaymagic & DM_EGID) ? PL_delaymagic_egid : (Gid_t)-1)); | |
56febc5e AD |
1609 | # else |
1610 | # ifdef HAS_SETRGID | |
b28d0864 | 1611 | if ((PL_delaymagic & DM_GID) == DM_RGID) { |
b469f1e0 | 1612 | PERL_UNUSED_RESULT(setrgid(PL_delaymagic_gid)); |
b28d0864 | 1613 | PL_delaymagic &= ~DM_RGID; |
a0d0e21e | 1614 | } |
56febc5e AD |
1615 | # endif /* HAS_SETRGID */ |
1616 | # ifdef HAS_SETEGID | |
b28d0864 | 1617 | if ((PL_delaymagic & DM_GID) == DM_EGID) { |
b469f1e0 | 1618 | PERL_UNUSED_RESULT(setegid(PL_delaymagic_egid)); |
b28d0864 | 1619 | PL_delaymagic &= ~DM_EGID; |
a0d0e21e | 1620 | } |
56febc5e | 1621 | # endif /* HAS_SETEGID */ |
b28d0864 | 1622 | if (PL_delaymagic & DM_GID) { |
985213f2 | 1623 | if (PL_delaymagic_gid != PL_delaymagic_egid) |
cea2e8a9 | 1624 | DIE(aTHX_ "No setregid available"); |
b469f1e0 | 1625 | PERL_UNUSED_RESULT(PerlProc_setgid(PL_delaymagic_gid)); |
a0d0e21e | 1626 | } |
56febc5e AD |
1627 | # endif /* HAS_SETREGID */ |
1628 | #endif /* HAS_SETRESGID */ | |
04783dc7 | 1629 | |
985213f2 AB |
1630 | tmp_gid = PerlProc_getgid(); |
1631 | tmp_egid = PerlProc_getegid(); | |
a0d0e21e | 1632 | } |
284167a5 | 1633 | TAINTING_set( TAINTING_get | (tmp_uid && (tmp_euid != tmp_uid || tmp_egid != tmp_gid)) ); |
9a9b5ec9 DM |
1634 | #ifdef NO_TAINT_SUPPORT |
1635 | PERL_UNUSED_VAR(tmp_uid); | |
1636 | PERL_UNUSED_VAR(tmp_euid); | |
1637 | PERL_UNUSED_VAR(tmp_gid); | |
1638 | PERL_UNUSED_VAR(tmp_egid); | |
1639 | #endif | |
a0d0e21e | 1640 | } |
a68090fe | 1641 | PL_delaymagic = old_delaymagic; |
54310121 | 1642 | |
54310121 | 1643 | if (gimme == G_VOID) |
1644 | SP = firstrelem - 1; | |
1645 | else if (gimme == G_SCALAR) { | |
1646 | dTARGET; | |
1647 | SP = firstrelem; | |
231cbeb2 | 1648 | SETi(lastrelem - firstrelem + 1); |
54310121 | 1649 | } |
1650 | else { | |
1c4ea384 | 1651 | if (ary || hash) |
1d2b3927 HS |
1652 | /* note that in this case *firstlelem may have been overwritten |
1653 | by sv_undef in the odd hash case */ | |
a0d0e21e | 1654 | SP = lastrelem; |
1c4ea384 | 1655 | else { |
a0d0e21e | 1656 | SP = firstrelem + (lastlelem - firstlelem); |
1c4ea384 RZ |
1657 | lelem = firstlelem + (relem - firstrelem); |
1658 | while (relem <= SP) | |
1659 | *relem++ = (lelem <= lastlelem) ? *lelem++ : &PL_sv_undef; | |
1660 | } | |
a0d0e21e | 1661 | } |
08aeb9f7 | 1662 | |
54310121 | 1663 | RETURN; |
a0d0e21e LW |
1664 | } |
1665 | ||
8782bef2 GB |
1666 | PP(pp_qr) |
1667 | { | |
20b7effb | 1668 | dSP; |
eb578fdb | 1669 | PMOP * const pm = cPMOP; |
fe578d7f | 1670 | REGEXP * rx = PM_GETRE(pm); |
10599a69 | 1671 | SV * const pkg = rx ? CALLREG_PACKAGE(rx) : NULL; |
c4420975 | 1672 | SV * const rv = sv_newmortal(); |
d63c20f2 DM |
1673 | CV **cvp; |
1674 | CV *cv; | |
288b8c02 NC |
1675 | |
1676 | SvUPGRADE(rv, SVt_IV); | |
c2123ae3 NC |
1677 | /* For a subroutine describing itself as "This is a hacky workaround" I'm |
1678 | loathe to use it here, but it seems to be the right fix. Or close. | |
1679 | The key part appears to be that it's essential for pp_qr to return a new | |
1680 | object (SV), which implies that there needs to be an effective way to | |
1681 | generate a new SV from the existing SV that is pre-compiled in the | |
1682 | optree. */ | |
1683 | SvRV_set(rv, MUTABLE_SV(reg_temp_copy(NULL, rx))); | |
288b8c02 NC |
1684 | SvROK_on(rv); |
1685 | ||
8d919b0a | 1686 | cvp = &( ReANY((REGEXP *)SvRV(rv))->qr_anoncv); |
5d9574c1 | 1687 | if (UNLIKELY((cv = *cvp) && CvCLONE(*cvp))) { |
d63c20f2 | 1688 | *cvp = cv_clone(cv); |
fc2b2dca | 1689 | SvREFCNT_dec_NN(cv); |
d63c20f2 DM |
1690 | } |
1691 | ||
288b8c02 | 1692 | if (pkg) { |
f815daf2 | 1693 | HV *const stash = gv_stashsv(pkg, GV_ADD); |
fc2b2dca | 1694 | SvREFCNT_dec_NN(pkg); |
288b8c02 NC |
1695 | (void)sv_bless(rv, stash); |
1696 | } | |
1697 | ||
5d9574c1 | 1698 | if (UNLIKELY(RX_ISTAINTED(rx))) { |
e08e52cf | 1699 | SvTAINTED_on(rv); |
9274aefd DM |
1700 | SvTAINTED_on(SvRV(rv)); |
1701 | } | |
c8c13c22 JB |
1702 | XPUSHs(rv); |
1703 | RETURN; | |
8782bef2 GB |
1704 | } |
1705 | ||
a0d0e21e LW |
1706 | PP(pp_match) |
1707 | { | |
20b7effb | 1708 | dSP; dTARG; |
eb578fdb | 1709 | PMOP *pm = cPMOP; |
d65afb4b | 1710 | PMOP *dynpm = pm; |
eb578fdb | 1711 | const char *s; |
5c144d81 | 1712 | const char *strend; |
99a90e59 | 1713 | SSize_t curpos = 0; /* initial pos() or current $+[0] */ |
a0d0e21e | 1714 | I32 global; |
7fadf4a7 | 1715 | U8 r_flags = 0; |
5c144d81 | 1716 | const char *truebase; /* Start of string */ |
eb578fdb | 1717 | REGEXP *rx = PM_GETRE(pm); |
b3eb6a9b | 1718 | bool rxtainted; |
1c23e2bd | 1719 | const U8 gimme = GIMME_V; |
a0d0e21e | 1720 | STRLEN len; |
a3b680e6 | 1721 | const I32 oldsave = PL_savestack_ix; |
e60df1fa | 1722 | I32 had_zerolen = 0; |
b1422d62 | 1723 | MAGIC *mg = NULL; |
a0d0e21e | 1724 | |
533c011a | 1725 | if (PL_op->op_flags & OPf_STACKED) |
a0d0e21e | 1726 | TARG = POPs; |
6ffceeb7 | 1727 | else if (ARGTARG) |
59f00321 | 1728 | GETTARGET; |
a0d0e21e | 1729 | else { |
54b9620d | 1730 | TARG = DEFSV; |
a0d0e21e LW |
1731 | EXTEND(SP,1); |
1732 | } | |
d9f424b2 | 1733 | |
c277df42 | 1734 | PUTBACK; /* EVAL blocks need stack_sp. */ |
69dc4b30 FC |
1735 | /* Skip get-magic if this is a qr// clone, because regcomp has |
1736 | already done it. */ | |
f1d31338 | 1737 | truebase = ReANY(rx)->mother_re |
69dc4b30 FC |
1738 | ? SvPV_nomg_const(TARG, len) |
1739 | : SvPV_const(TARG, len); | |
f1d31338 | 1740 | if (!truebase) |
2269b42e | 1741 | DIE(aTHX_ "panic: pp_match"); |
f1d31338 | 1742 | strend = truebase + len; |
284167a5 S |
1743 | rxtainted = (RX_ISTAINTED(rx) || |
1744 | (TAINT_get && (pm->op_pmflags & PMf_RETAINT))); | |
9212bbba | 1745 | TAINT_NOT; |
a0d0e21e | 1746 | |
6c864ec2 | 1747 | /* We need to know this in case we fail out early - pos() must be reset */ |
de0df3c0 MH |
1748 | global = dynpm->op_pmflags & PMf_GLOBAL; |
1749 | ||
d65afb4b | 1750 | /* PMdf_USED is set after a ?? matches once */ |
c737faaf YO |
1751 | if ( |
1752 | #ifdef USE_ITHREADS | |
1753 | SvREADONLY(PL_regex_pad[pm->op_pmoffset]) | |
1754 | #else | |
1755 | pm->op_pmflags & PMf_USED | |
1756 | #endif | |
1757 | ) { | |
e5dc5375 | 1758 | DEBUG_r(PerlIO_printf(Perl_debug_log, "?? already matched once")); |
de0df3c0 | 1759 | goto nope; |
a0d0e21e LW |
1760 | } |
1761 | ||
7e313637 FC |
1762 | /* empty pattern special-cased to use last successful pattern if |
1763 | possible, except for qr// */ | |
8d919b0a | 1764 | if (!ReANY(rx)->mother_re && !RX_PRELEN(rx) |
7e313637 | 1765 | && PL_curpm) { |
3280af22 | 1766 | pm = PL_curpm; |
aaa362c4 | 1767 | rx = PM_GETRE(pm); |
a0d0e21e | 1768 | } |
d65afb4b | 1769 | |
389ecb56 | 1770 | if (RX_MINLEN(rx) >= 0 && (STRLEN)RX_MINLEN(rx) > len) { |
75d43e96 FC |
1771 | DEBUG_r(PerlIO_printf(Perl_debug_log, "String shorter than min possible regex match (%" |
1772 | UVuf" < %"IVdf")\n", | |
1773 | (UV)len, (IV)RX_MINLEN(rx))); | |
de0df3c0 | 1774 | goto nope; |
e5dc5375 | 1775 | } |
c277df42 | 1776 | |
8ef97b0e | 1777 | /* get pos() if //g */ |
de0df3c0 | 1778 | if (global) { |
b1422d62 | 1779 | mg = mg_find_mglob(TARG); |
8ef97b0e | 1780 | if (mg && mg->mg_len >= 0) { |
25fdce4a | 1781 | curpos = MgBYTEPOS(mg, TARG, truebase, len); |
8ef97b0e DM |
1782 | /* last time pos() was set, it was zero-length match */ |
1783 | if (mg->mg_flags & MGf_MINMATCH) | |
1784 | had_zerolen = 1; | |
1785 | } | |
a0d0e21e | 1786 | } |
8ef97b0e | 1787 | |
6e240d0b | 1788 | #ifdef PERL_SAWAMPERSAND |
a41aa44d | 1789 | if ( RX_NPARENS(rx) |
6502e081 | 1790 | || PL_sawampersand |
6502e081 | 1791 | || (RX_EXTFLAGS(rx) & (RXf_EVAL_SEEN|RXf_PMf_KEEPCOPY)) |
5b0e71e9 | 1792 | || (dynpm->op_pmflags & PMf_KEEPCOPY) |
6e240d0b FC |
1793 | ) |
1794 | #endif | |
1795 | { | |
6502e081 DM |
1796 | r_flags |= (REXEC_COPY_STR|REXEC_COPY_SKIP_PRE); |
1797 | /* in @a =~ /(.)/g, we iterate multiple times, but copy the buffer | |
1798 | * only on the first iteration. Therefore we need to copy $' as well | |
1799 | * as $&, to make the rest of the string available for captures in | |
1800 | * subsequent iterations */ | |
1801 | if (! (global && gimme == G_ARRAY)) | |
1802 | r_flags |= REXEC_COPY_SKIP_POST; | |
1803 | }; | |
5b0e71e9 DM |
1804 | #ifdef PERL_SAWAMPERSAND |
1805 | if (dynpm->op_pmflags & PMf_KEEPCOPY) | |
1806 | /* handle KEEPCOPY in pmop but not rx, eg $r=qr/a/; /$r/p */ | |
1807 | r_flags &= ~(REXEC_COPY_SKIP_PRE|REXEC_COPY_SKIP_POST); | |
1808 | #endif | |
22e551b9 | 1809 | |
f1d31338 DM |
1810 | s = truebase; |
1811 | ||
d7be1480 | 1812 | play_it_again: |
985afbc1 | 1813 | if (global) |
03c83e26 | 1814 | s = truebase + curpos; |
f722798b | 1815 | |
77da2310 | 1816 | if (!CALLREGEXEC(rx, (char*)s, (char *)strend, (char*)truebase, |
03c83e26 | 1817 | had_zerolen, TARG, NULL, r_flags)) |
03b6c93d | 1818 | goto nope; |
77da2310 NC |
1819 | |
1820 | PL_curpm = pm; | |
985afbc1 | 1821 | if (dynpm->op_pmflags & PMf_ONCE) |
c737faaf | 1822 | #ifdef USE_ITHREADS |
77da2310 | 1823 | SvREADONLY_on(PL_regex_pad[dynpm->op_pmoffset]); |
c737faaf | 1824 | #else |
77da2310 | 1825 | dynpm->op_pmflags |= PMf_USED; |
c737faaf | 1826 | #endif |
a0d0e21e | 1827 | |
72311751 GS |
1828 | if (rxtainted) |
1829 | RX_MATCH_TAINTED_on(rx); | |
1830 | TAINT_IF(RX_MATCH_TAINTED(rx)); | |
35c2ccc3 DM |
1831 | |
1832 | /* update pos */ | |
1833 | ||
1834 | if (global && (gimme != G_ARRAY || (dynpm->op_pmflags & PMf_CONTINUE))) { | |
b1422d62 | 1835 | if (!mg) |
35c2ccc3 | 1836 | mg = sv_magicext_mglob(TARG); |
25fdce4a | 1837 | MgBYTEPOS_set(mg, TARG, truebase, RX_OFFS(rx)[0].end); |
adf51885 DM |
1838 | if (RX_ZERO_LEN(rx)) |
1839 | mg->mg_flags |= MGf_MINMATCH; | |
1840 | else | |
1841 | mg->mg_flags &= ~MGf_MINMATCH; | |
35c2ccc3 DM |
1842 | } |
1843 | ||
bf9dff51 DM |
1844 | if ((!RX_NPARENS(rx) && !global) || gimme != G_ARRAY) { |
1845 | LEAVE_SCOPE(oldsave); | |
1846 | RETPUSHYES; | |
1847 | } | |
1848 | ||
88ab22af DM |
1849 | /* push captures on stack */ |
1850 | ||
bf9dff51 | 1851 | { |
07bc277f | 1852 | const I32 nparens = RX_NPARENS(rx); |
a3b680e6 | 1853 | I32 i = (global && !nparens) ? 1 : 0; |
a0d0e21e | 1854 | |
c277df42 | 1855 | SPAGAIN; /* EVAL blocks could move the stack. */ |
ffc61ed2 JH |
1856 | EXTEND(SP, nparens + i); |
1857 | EXTEND_MORTAL(nparens + i); | |
1858 | for (i = !i; i <= nparens; i++) { | |
a0d0e21e | 1859 | PUSHs(sv_newmortal()); |
5d9574c1 DM |
1860 | if (LIKELY((RX_OFFS(rx)[i].start != -1) |
1861 | && RX_OFFS(rx)[i].end != -1 )) | |
1862 | { | |
07bc277f | 1863 | const I32 len = RX_OFFS(rx)[i].end - RX_OFFS(rx)[i].start; |
f1d31338 | 1864 | const char * const s = RX_OFFS(rx)[i].start + truebase; |
5d9574c1 DM |
1865 | if (UNLIKELY(RX_OFFS(rx)[i].end < 0 || RX_OFFS(rx)[i].start < 0 |
1866 | || len < 0 || len > strend - s)) | |
5637ef5b NC |
1867 | DIE(aTHX_ "panic: pp_match start/end pointers, i=%ld, " |
1868 | "start=%ld, end=%ld, s=%p, strend=%p, len=%"UVuf, | |
1869 | (long) i, (long) RX_OFFS(rx)[i].start, | |
1870 | (long)RX_OFFS(rx)[i].end, s, strend, (UV) len); | |
a0d0e21e | 1871 | sv_setpvn(*SP, s, len); |
cce850e4 | 1872 | if (DO_UTF8(TARG) && is_utf8_string((U8*)s, len)) |
a197cbdd | 1873 | SvUTF8_on(*SP); |
a0d0e21e LW |
1874 | } |
1875 | } | |
1876 | if (global) { | |
0e0b3e82 | 1877 | curpos = (UV)RX_OFFS(rx)[0].end; |
03c83e26 | 1878 | had_zerolen = RX_ZERO_LEN(rx); |
c277df42 | 1879 | PUTBACK; /* EVAL blocks may use stack */ |
cf93c79d | 1880 | r_flags |= REXEC_IGNOREPOS | REXEC_NOT_FIRST; |
a0d0e21e LW |
1881 | goto play_it_again; |
1882 | } | |
4633a7c4 | 1883 | LEAVE_SCOPE(oldsave); |
a0d0e21e LW |
1884 | RETURN; |
1885 | } | |
e5964223 | 1886 | NOT_REACHED; /* NOTREACHED */ |
a0d0e21e | 1887 | |
7b52d656 | 1888 | nope: |
d65afb4b | 1889 | if (global && !(dynpm->op_pmflags & PMf_CONTINUE)) { |
b1422d62 DM |
1890 | if (!mg) |
1891 | mg = mg_find_mglob(TARG); | |
1892 | if (mg) | |
1893 | mg->mg_len = -1; | |
a0d0e21e | 1894 | } |
4633a7c4 | 1895 | LEAVE_SCOPE(oldsave); |
a0d0e21e LW |
1896 | if (gimme == G_ARRAY) |
1897 | RETURN; | |
1898 | RETPUSHNO; | |
1899 | } | |
1900 | ||
1901 | OP * | |
864dbfa3 | 1902 | Perl_do_readline(pTHX) |
a0d0e21e | 1903 | { |
20b7effb | 1904 | dSP; dTARGETSTACKED; |
eb578fdb | 1905 | SV *sv; |
a0d0e21e LW |
1906 | STRLEN tmplen = 0; |
1907 | STRLEN offset; | |
760ac839 | 1908 | PerlIO *fp; |
eb578fdb KW |
1909 | IO * const io = GvIO(PL_last_in_gv); |
1910 | const I32 type = PL_op->op_type; | |
1c23e2bd | 1911 | const U8 gimme = GIMME_V; |
a0d0e21e | 1912 | |
6136c704 | 1913 | if (io) { |
50db69d8 | 1914 | const MAGIC *const mg = SvTIED_mg((const SV *)io, PERL_MAGIC_tiedscalar); |
6136c704 | 1915 | if (mg) { |
3e0cb5de | 1916 | Perl_tied_method(aTHX_ SV_CONST(READLINE), SP, MUTABLE_SV(io), mg, gimme, 0); |
6136c704 | 1917 | if (gimme == G_SCALAR) { |
50db69d8 NC |
1918 | SPAGAIN; |
1919 | SvSetSV_nosteal(TARG, TOPs); | |
1920 | SETTARG; | |
6136c704 | 1921 | } |
50db69d8 | 1922 | return NORMAL; |
0b7c7b4f | 1923 | } |
e79b0511 | 1924 | } |
4608196e | 1925 | fp = NULL; |
a0d0e21e LW |
1926 | if (io) { |
1927 | fp = IoIFP(io); | |
1928 | if (!fp) { | |
1929 | if (IoFLAGS(io) & IOf_ARGV) { | |
1930 | if (IoFLAGS(io) & IOf_START) { | |
a0d0e21e | 1931 | IoLINES(io) = 0; |
b9f2b683 | 1932 | if (av_tindex(GvAVn(PL_last_in_gv)) < 0) { |
1d7c1841 | 1933 | IoFLAGS(io) &= ~IOf_START; |
d5eb9a46 | 1934 | do_open6(PL_last_in_gv, "-", 1, NULL, NULL, 0); |
4bac9ae4 | 1935 | SvTAINTED_off(GvSVn(PL_last_in_gv)); /* previous tainting irrelevant */ |
76f68e9b | 1936 | sv_setpvs(GvSVn(PL_last_in_gv), "-"); |
3280af22 | 1937 | SvSETMAGIC(GvSV(PL_last_in_gv)); |
a2008d6d GS |
1938 | fp = IoIFP(io); |
1939 | goto have_fp; | |
a0d0e21e LW |
1940 | } |
1941 | } | |
157fb5a1 | 1942 | fp = nextargv(PL_last_in_gv, PL_op->op_flags & OPf_SPECIAL); |
a0d0e21e | 1943 | if (!fp) { /* Note: fp != IoIFP(io) */ |
3280af22 | 1944 | (void)do_close(PL_last_in_gv, FALSE); /* now it does*/ |
a0d0e21e LW |
1945 | } |
1946 | } | |
0d44d22b NC |
1947 | else if (type == OP_GLOB) |
1948 | fp = Perl_start_glob(aTHX_ POPs, io); | |
a0d0e21e LW |
1949 | } |
1950 | else if (type == OP_GLOB) | |
1951 | SP--; | |
7716c5c5 | 1952 | else if (IoTYPE(io) == IoTYPE_WRONLY) { |
a5390457 | 1953 | report_wrongway_fh(PL_last_in_gv, '>'); |
a00b5bd3 | 1954 | } |
a0d0e21e LW |
1955 | } |
1956 | if (!fp) { | |
041457d9 | 1957 | if ((!io || !(IoFLAGS(io) & IOf_START)) |
de7dabb6 TC |
1958 | && ckWARN(WARN_CLOSED) |
1959 | && type != OP_GLOB) | |
041457d9 | 1960 | { |
de7dabb6 | 1961 | report_evil_fh(PL_last_in_gv); |
3f4520fe | 1962 | } |
54310121 | 1963 | if (gimme == G_SCALAR) { |
79628082 | 1964 | /* undef TARG, and push that undefined value */ |
ba92458f | 1965 | if (type != OP_RCATLINE) { |
aab1202a | 1966 | sv_setsv(TARG,NULL); |
ba92458f | 1967 | } |
a0d0e21e LW |
1968 | PUSHTARG; |
1969 | } | |
1970 | RETURN; | |
1971 | } | |
a2008d6d | 1972 | have_fp: |
54310121 | 1973 | if (gimme == G_SCALAR) { |
a0d0e21e | 1974 | sv = TARG; |
0f722b55 RGS |
1975 | if (type == OP_RCATLINE && SvGMAGICAL(sv)) |
1976 | mg_get(sv); | |
48de12d9 RGS |
1977 | if (SvROK(sv)) { |
1978 | if (type == OP_RCATLINE) | |
5668452f | 1979 | SvPV_force_nomg_nolen(sv); |
48de12d9 RGS |
1980 | else |
1981 | sv_unref(sv); | |
1982 | } | |
f7877b28 | 1983 | else if (isGV_with_GP(sv)) { |
5668452f | 1984 | SvPV_force_nomg_nolen(sv); |
f7877b28 | 1985 | } |
862a34c6 | 1986 | SvUPGRADE(sv, SVt_PV); |
a0d0e21e | 1987 | tmplen = SvLEN(sv); /* remember if already alloced */ |
e3918bb7 | 1988 | if (!tmplen && !SvREADONLY(sv) && !SvIsCOW(sv)) { |
f72e8700 JJ |
1989 | /* try short-buffering it. Please update t/op/readline.t |
1990 | * if you change the growth length. | |
1991 | */ | |
1992 | Sv_Grow(sv, 80); | |
1993 | } | |
2b5e58c4 AMS |
1994 | offset = 0; |
1995 | if (type == OP_RCATLINE && SvOK(sv)) { | |
1996 | if (!SvPOK(sv)) { | |
5668452f | 1997 | SvPV_force_nomg_nolen(sv); |
2b5e58c4 | 1998 | } |
a0d0e21e | 1999 | offset = SvCUR(sv); |
2b5e58c4 | 2000 | } |
a0d0e21e | 2001 | } |
54310121 | 2002 | else { |
561b68a9 | 2003 | sv = sv_2mortal(newSV(80)); |
54310121 | 2004 | offset = 0; |
2005 | } | |
fbad3eb5 | 2006 | |
3887d568 AP |
2007 | /* This should not be marked tainted if the fp is marked clean */ |
2008 | #define MAYBE_TAINT_LINE(io, sv) \ | |
2009 | if (!(IoFLAGS(io) & IOf_UNTAINT)) { \ | |
2010 | TAINT; \ | |
2011 | SvTAINTED_on(sv); \ | |
2012 | } | |
2013 | ||
684bef36 | 2014 | /* delay EOF state for a snarfed empty file */ |
fbad3eb5 | 2015 | #define SNARF_EOF(gimme,rs,io,sv) \ |
684bef36 | 2016 | (gimme != G_SCALAR || SvCUR(sv) \ |
b9fee9ba | 2017 | || (IoFLAGS(io) & IOf_NOLINE) || !RsSNARF(rs)) |
fbad3eb5 | 2018 | |
a0d0e21e | 2019 | for (;;) { |
09e8efcc | 2020 | PUTBACK; |
fbad3eb5 | 2021 | if (!sv_gets(sv, fp, offset) |
2d726892 TF |
2022 | && (type == OP_GLOB |
2023 | || SNARF_EOF(gimme, PL_rs, io, sv) | |
2024 | || PerlIO_error(fp))) | |
fbad3eb5 | 2025 | { |
760ac839 | 2026 | PerlIO_clearerr(fp); |
a0d0e21e | 2027 | if (IoFLAGS(io) & IOf_ARGV) { |
157fb5a1 | 2028 | fp = nextargv(PL_last_in_gv, PL_op->op_flags & OPf_SPECIAL); |
a0d0e21e LW |
2029 | if (fp) |
2030 | continue; | |
3280af22 | 2031 | (void)do_close(PL_last_in_gv, FALSE); |
a0d0e21e LW |
2032 | } |
2033 | else if (type == OP_GLOB) { | |
a2a5de95 NC |
2034 | if (!do_close(PL_last_in_gv, FALSE)) { |
2035 | Perl_ck_warner(aTHX_ packWARN(WARN_GLOB), | |
2036 | "glob failed (child exited with status %d%s)", | |
2037 | (int)(STATUS_CURRENT >> 8), | |
2038 | (STATUS_CURRENT & 0x80) ? ", core dumped" : ""); | |
4eb79ab5 | 2039 | } |
a0d0e21e | 2040 | } |
54310121 | 2041 | if (gimme == G_SCALAR) { |
ba92458f AE |
2042 | if (type != OP_RCATLINE) { |
2043 | SV_CHECK_THINKFIRST_COW_DROP(TARG); | |
0c34ef67 | 2044 | SvOK_off(TARG); |
ba92458f | 2045 | } |
09e8efcc | 2046 | SPAGAIN; |
a0d0e21e LW |
2047 | PUSHTARG; |
2048 | } | |
3887d568 | 2049 | MAYBE_TAINT_LINE(io, sv); |
a0d0e21e LW |
2050 | RETURN; |
2051 | } | |
3887d568 | 2052 | MAYBE_TAINT_LINE(io, sv); |
a0d0e21e | 2053 | IoLINES(io)++; |
b9fee9ba | 2054 | IoFLAGS(io) |= IOf_NOLINE; |
71be2cbc | 2055 | SvSETMAGIC(sv); |
09e8efcc | 2056 | SPAGAIN; |
a0d0e21e | 2057 | XPUSHs(sv); |
a0d0e21e | 2058 | if (type == OP_GLOB) { |
349d4f2f | 2059 | const char *t1; |
45a23732 | 2060 | Stat_t statbuf; |
a0d0e21e | 2061 | |
3280af22 | 2062 | if (SvCUR(sv) > 0 && SvCUR(PL_rs) > 0) { |
6136c704 | 2063 | char * const tmps = SvEND(sv) - 1; |
aa07b2f6 | 2064 | if (*tmps == *SvPVX_const(PL_rs)) { |
c07a80fd | 2065 | *tmps = '\0'; |
b162af07 | 2066 | SvCUR_set(sv, SvCUR(sv) - 1); |
c07a80fd | 2067 | } |
2068 | } | |
349d4f2f | 2069 | for (t1 = SvPVX_const(sv); *t1; t1++) |
b51c3e77 CB |
2070 | #ifdef __VMS |
2071 | if (strchr("*%?", *t1)) | |
2072 | #else | |
7ad1e72d | 2073 | if (strchr("$&*(){}[]'\";\\|?<>~`", *t1)) |
b51c3e77 | 2074 | #endif |
a0d0e21e | 2075 | break; |
45a23732 | 2076 | if (*t1 && PerlLIO_lstat(SvPVX_const(sv), &statbuf) < 0) { |
a0d0e21e LW |
2077 | (void)POPs; /* Unmatched wildcard? Chuck it... */ |
2078 | continue; | |
2079 | } | |
2d79bf7f | 2080 | } else if (SvUTF8(sv)) { /* OP_READLINE, OP_RCATLINE */ |
d4c19fe8 AL |
2081 | if (ckWARN(WARN_UTF8)) { |
2082 | const U8 * const s = (const U8*)SvPVX_const(sv) + offset; | |
2083 | const STRLEN len = SvCUR(sv) - offset; | |
2084 | const U8 *f; | |
2085 | ||
2086 | if (!is_utf8_string_loc(s, len, &f)) | |
2087 | /* Emulate :encoding(utf8) warning in the same case. */ | |
2088 | Perl_warner(aTHX_ packWARN(WARN_UTF8), | |
2089 | "utf8 \"\\x%02X\" does not map to Unicode", | |
2090 | f < (U8*)SvEND(sv) ? *f : 0); | |
2091 | } | |
a0d0e21e | 2092 | } |
54310121 | 2093 | if (gimme == G_ARRAY) { |
a0d0e21e | 2094 | if (SvLEN(sv) - SvCUR(sv) > 20) { |
1da4ca5f | 2095 | SvPV_shrink_to_cur(sv); |
a0d0e21e | 2096 | } |
561b68a9 | 2097 | sv = sv_2mortal(newSV(80)); |
a0d0e21e LW |
2098 | continue; |
2099 | } | |
54310121 | 2100 | else if (gimme == G_SCALAR && !tmplen && SvLEN(sv) - SvCUR(sv) > 80) { |
a0d0e21e | 2101 | /* try to reclaim a bit of scalar space (only on 1st alloc) */ |
d5b5861b NC |
2102 | const STRLEN new_len |
2103 | = SvCUR(sv) < 60 ? 80 : SvCUR(sv)+40; /* allow some slop */ | |
1da4ca5f | 2104 | SvPV_renew(sv, new_len); |
a0d0e21e LW |
2105 | } |
2106 | RETURN; | |
2107 | } | |
2108 | } | |
2109 | ||
a0d0e21e LW |
2110 | PP(pp_helem) |
2111 | { | |
20b7effb | 2112 | dSP; |
760ac839 | 2113 | HE* he; |
ae77835f | 2114 | SV **svp; |
c445ea15 | 2115 | SV * const keysv = POPs; |
85fbaab2 | 2116 | HV * const hv = MUTABLE_HV(POPs); |
a3b680e6 AL |
2117 | const U32 lval = PL_op->op_flags & OPf_MOD || LVRET; |
2118 | const U32 defer = PL_op->op_private & OPpLVAL_DEFER; | |
be6c24e0 | 2119 | SV *sv; |
92970b93 | 2120 | const bool localizing = PL_op->op_private & OPpLVAL_INTRO; |
d30e492c | 2121 | bool preeminent = TRUE; |
a0d0e21e | 2122 | |
6dfc73ea S |
2123 | if (SvTYPE(hv) != SVt_PVHV) |
2124 | RETPUSHUNDEF; | |
d4c19fe8 | 2125 | |
92970b93 | 2126 | if (localizing) { |
d4c19fe8 AL |
2127 | MAGIC *mg; |
2128 | HV *stash; | |
d30e492c VP |
2129 | |
2130 | /* If we can determine whether the element exist, | |
2131 | * Try to preserve the existenceness of a tied hash | |
2132 | * element by using EXISTS and DELETE if possible. | |
2133 | * Fallback to FETCH and STORE otherwise. */ | |
2c5f48c2 | 2134 | if (SvCANEXISTDELETE(hv)) |
d30e492c | 2135 | preeminent = hv_exists_ent(hv, keysv, 0); |
d4c19fe8 | 2136 | } |
d30e492c | 2137 | |
5f9d7e2b | 2138 | he = hv_fetch_ent(hv, keysv, lval && !defer, 0); |
d4c19fe8 | 2139 | svp = he ? &HeVAL(he) : NULL; |
a0d0e21e | 2140 | if (lval) { |
746f6409 | 2141 | if (!svp || !*svp || *svp == &PL_sv_undef) { |
68dc0745 | 2142 | SV* lv; |
2143 | SV* key2; | |
2d8e6c8d | 2144 | if (!defer) { |
be2597df | 2145 | DIE(aTHX_ PL_no_helem_sv, SVfARG(keysv)); |
2d8e6c8d | 2146 | } |
68dc0745 | 2147 | lv = sv_newmortal(); |
2148 | sv_upgrade(lv, SVt_PVLV); | |
2149 | LvTYPE(lv) = 'y'; | |
6136c704 | 2150 | sv_magic(lv, key2 = newSVsv(keysv), PERL_MAGIC_defelem, NULL, 0); |
fc2b2dca | 2151 | SvREFCNT_dec_NN(key2); /* sv_magic() increments refcount */ |
0ad694a7 | 2152 | LvTARG(lv) = SvREFCNT_inc_simple_NN(hv); |
68dc0745 | 2153 | LvTARGLEN(lv) = 1; |
2154 | PUSHs(lv); | |
2155 | RETURN; | |
2156 | } | |
92970b93 | 2157 | if (localizing) { |
bfcb3514 | 2158 | if (HvNAME_get(hv) && isGV(*svp)) |
159b6efe | 2159 | save_gp(MUTABLE_GV(*svp), !(PL_op->op_flags & OPf_SPECIAL)); |
47cfc530 VP |
2160 | else if (preeminent) |
2161 | save_helem_flags(hv, keysv, svp, | |
2162 | (PL_op->op_flags & OPf_SPECIAL) ? 0 : SAVEf_SETMAGIC); | |
2163 | else | |
2164 | SAVEHDELETE(hv, keysv); | |
5f05dabc | 2165 | } |
9026059d GG |
2166 | else if (PL_op->op_private & OPpDEREF) { |
2167 | PUSHs(vivify_ref(*svp, PL_op->op_private & OPpDEREF)); | |
2168 | RETURN; | |
2169 | } | |
a0d0e21e | 2170 | } |
746f6409 | 2171 | sv = (svp && *svp ? *svp : &PL_sv_undef); |
fd69380d DM |
2172 | /* Originally this did a conditional C<sv = sv_mortalcopy(sv)>; this |
2173 | * was to make C<local $tied{foo} = $tied{foo}> possible. | |
2174 | * However, it seems no longer to be needed for that purpose, and | |
2175 | * introduced a new bug: stuff like C<while ($hash{taintedval} =~ /.../g> | |
2176 | * would loop endlessly since the pos magic is getting set on the | |
2177 | * mortal copy and lost. However, the copy has the effect of | |
2178 | * triggering the get magic, and losing it altogether made things like | |
2179 | * c<$tied{foo};> in void context no longer do get magic, which some | |
2180 | * code relied on. Also, delayed triggering of magic on @+ and friends | |
2181 | * meant the original regex may be out of scope by now. So as a | |
2182 | * compromise, do the get magic here. (The MGf_GSKIP flag will stop it | |
2183 | * being called too many times). */ | |
39cf747a | 2184 | if (!lval && SvRMAGICAL(hv) && SvGMAGICAL(sv)) |
fd69380d | 2185 | mg_get(sv); |
be6c24e0 | 2186 | PUSHs(sv); |
a0d0e21e LW |
2187 | RETURN; |
2188 | } | |
2189 | ||
fedf30e1 DM |
2190 | |
2191 | /* a stripped-down version of Perl_softref2xv() for use by | |
2192 | * pp_multideref(), which doesn't use PL_op->op_flags */ | |
2193 | ||
f9db5646 | 2194 | STATIC GV * |
fedf30e1 DM |
2195 | S_softref2xv_lite(pTHX_ SV *const sv, const char *const what, |
2196 | const svtype type) | |
2197 | { | |
2198 | if (PL_op->op_private & HINT_STRICT_REFS) { | |
2199 | if (SvOK(sv)) | |
2200 | Perl_die(aTHX_ PL_no_symref_sv, sv, | |
2201 | (SvPOKp(sv) && SvCUR(sv)>32 ? "..." : ""), what); | |
2202 | else | |
2203 | Perl_die(aTHX_ PL_no_usym, what); | |
2204 | } | |
2205 | if (!SvOK(sv)) | |
2206 | Perl_die(aTHX_ PL_no_usym, what); | |
2207 | return gv_fetchsv_nomg(sv, GV_ADD, type); | |
2208 | } | |
2209 | ||
2210 | ||
79815f56 DM |
2211 | /* Handle one or more aggregate derefs and array/hash indexings, e.g. |
2212 | * $h->{foo} or $a[0]{$key}[$i] or f()->[1] | |
fedf30e1 DM |
2213 | * |
2214 | * op_aux points to an array of unions of UV / IV / SV* / PADOFFSET. | |
79815f56 DM |
2215 | * Each of these either contains a set of actions, or an argument, such as |
2216 | * an IV to use as an array index, or a lexical var to retrieve. | |
2217 | * Several actions re stored per UV; we keep shifting new actions off the | |
2218 | * one UV, and only reload when it becomes zero. | |
fedf30e1 DM |
2219 | */ |
2220 | ||
2221 | PP(pp_multideref) | |
2222 | { | |
2223 | SV *sv = NULL; /* init to avoid spurious 'may be used uninitialized' */ | |
2224 | UNOP_AUX_item *items = cUNOP_AUXx(PL_op)->op_aux; | |
2225 | UV actions = items->uv; | |
2226 | ||
2227 | assert(actions); | |
2228 | /* this tells find_uninit_var() where we're up to */ | |
2229 | PL_multideref_pc = items; | |
2230 | ||
2231 | while (1) { | |
2232 | /* there are three main classes of action; the first retrieve | |
2233 | * the initial AV or HV from a variable or the stack; the second | |
2234 | * does the equivalent of an unrolled (/DREFAV, rv2av, aelem), | |
2235 | * the third an unrolled (/DREFHV, rv2hv, helem). | |
2236 | */ | |
2237 | switch (actions & MDEREF_ACTION_MASK) { | |
2238 | ||
2239 | case MDEREF_reload: | |
2240 | actions = (++items)->uv; | |
2241 | continue; | |
2242 | ||
2243 | case MDEREF_AV_padav_aelem: /* $lex[...] */ | |
2244 | sv = PAD_SVl((++items)->pad_offset); | |
2245 | goto do_AV_aelem; | |
2246 | ||
2247 | case MDEREF_AV_gvav_aelem: /* $pkg[...] */ | |
2248 | sv = UNOP_AUX_item_sv(++items); | |
2249 | assert(isGV_with_GP(sv)); | |
2250 | sv = (SV*)GvAVn((GV*)sv); | |
2251 | goto do_AV_aelem; | |
2252 | ||
2253 | case MDEREF_AV_pop_rv2av_aelem: /* expr->[...] */ | |
2254 | { | |
2255 | dSP; | |
2256 | sv = POPs; | |
2257 | PUTBACK; | |
2258 | goto do_AV_rv2av_aelem; | |
2259 | } | |
2260 | ||
2261 | case MDEREF_AV_gvsv_vivify_rv2av_aelem: /* $pkg->[...] */ | |
2262 | sv = UNOP_AUX_item_sv(++items); | |
2263 | assert(isGV_with_GP(sv)); | |
2264 | sv = GvSVn((GV*)sv); | |
2265 | goto do_AV_vivify_rv2av_aelem; | |
2266 | ||
2267 | case MDEREF_AV_padsv_vivify_rv2av_aelem: /* $lex->[...] */ | |
2268 | sv = PAD_SVl((++items)->pad_offset); | |
2269 | /* FALLTHROUGH */ | |
2270 | ||
2271 | do_AV_vivify_rv2av_aelem: | |
2272 | case MDEREF_AV_vivify_rv2av_aelem: /* vivify, ->[...] */ | |
2273 | /* this is the OPpDEREF action normally found at the end of | |
2274 | * ops like aelem, helem, rv2sv */ | |
2275 | sv = vivify_ref(sv, OPpDEREF_AV); | |
2276 | /* FALLTHROUGH */ | |
2277 | ||
2278 | do_AV_rv2av_aelem: | |
2279 | /* this is basically a copy of pp_rv2av when it just has the | |
2280 | * sKR/1 flags */ | |
2281 | SvGETMAGIC(sv); | |
2282 | if (LIKELY(SvROK(sv))) { | |
2283 | if (UNLIKELY(SvAMAGIC(sv))) { | |
2284 | sv = amagic_deref_call(sv, to_av_amg); | |
2285 | } | |
2286 | sv = SvRV(sv); | |
2287 | if (UNLIKELY(SvTYPE(sv) != SVt_PVAV)) | |
2288 | DIE(aTHX_ "Not an ARRAY reference"); | |
2289 | } | |
2290 | else if (SvTYPE(sv) != SVt_PVAV) { | |
2291 | if (!isGV_with_GP(sv)) | |
2292 | sv = (SV*)S_softref2xv_lite(aTHX_ sv, "an ARRAY", SVt_PVAV); | |
2293 | sv = MUTABLE_SV(GvAVn((GV*)sv)); | |
2294 | } | |
2295 | /* FALLTHROUGH */ | |
2296 | ||
2297 | do_AV_aelem: | |
2298 | { | |
2299 | /* retrieve the key; this may be either a lexical or package | |
2300 | * var (whose index/ptr is stored as an item) or a signed | |
2301 | * integer constant stored as an item. | |
2302 | */ | |
2303 | SV *elemsv; | |
2304 | IV elem = 0; /* to shut up stupid compiler warnings */ | |
2305 | ||
2306 | ||
2307 | assert(SvTYPE(sv) == SVt_PVAV); | |
2308 | ||
2309 | switch (actions & MDEREF_INDEX_MASK) { | |
2310 | case MDEREF_INDEX_none: | |
2311 | goto finish; | |
2312 | case MDEREF_INDEX_const: | |
2313 | elem = (++items)->iv; | |
2314 | break; | |
2315 | case MDEREF_INDEX_padsv: | |
2316 | elemsv = PAD_SVl((++items)->pad_offset); | |
2317 | goto check_elem; | |
2318 | case MDEREF_INDEX_gvsv: | |
2319 | elemsv = UNOP_AUX_item_sv(++items); | |
2320 | assert(isGV_with_GP(elemsv)); | |
2321 | elemsv = GvSVn((GV*)elemsv); | |
2322 | check_elem: | |
2323 | if (UNLIKELY(SvROK(elemsv) && !SvGAMAGIC(elemsv) | |
2324 | && ckWARN(WARN_MISC))) | |
2325 | Perl_warner(aTHX_ packWARN(WARN_MISC), | |
2326 | "Use of reference \"%"SVf"\" as array index", | |
2327 | SVfARG(elemsv)); | |
2328 | /* the only time that S_find_uninit_var() needs this | |
2329 | * is to determine which index value triggered the | |
2330 | * undef warning. So just update it here. Note that | |
2331 | * since we don't save and restore this var (e.g. for | |
2332 | * tie or overload execution), its value will be | |
2333 | * meaningless apart from just here */ | |
2334 | PL_multideref_pc = items; | |
2335 | elem = SvIV(elemsv); | |
2336 | break; | |
2337 | } | |
2338 | ||
2339 | ||
2340 | /* this is basically a copy of pp_aelem with OPpDEREF skipped */ | |
2341 | ||
2342 | if (!(actions & MDEREF_FLAG_last)) { | |
2343 | SV** svp = av_fetch((AV*)sv, elem, 1); | |
2344 | if (!svp || ! (sv=*svp)) | |
2345 | DIE(aTHX_ PL_no_aelem, elem); | |
2346 | break; | |
2347 | } | |
2348 | ||
2349 | if (PL_op->op_private & | |
2350 | (OPpMULTIDEREF_EXISTS|OPpMULTIDEREF_DELETE)) | |
2351 | { | |
2352 | if (PL_op->op_private & OPpMULTIDEREF_EXISTS) { | |
2353 | sv = av_exists((AV*)sv, elem) ? &PL_sv_yes : &PL_sv_no; | |
2354 | } | |
2355 | else { | |
2356 | I32 discard = (GIMME_V == G_VOID) ? G_DISCARD : 0; | |
2357 | sv = av_delete((AV*)sv, elem, discard); | |
2358 | if (discard) | |
2359 | return NORMAL; | |
2360 | if (!sv) | |
2361 | sv = &PL_sv_undef; | |
2362 | } | |
2363 | } | |
2364 | else { | |
2365 | const U32 lval = PL_op->op_flags & OPf_MOD || LVRET; | |
2366 | const U32 defer = PL_op->op_private & OPpLVAL_DEFER; | |
2367 | const bool localizing = PL_op->op_private & OPpLVAL_INTRO; | |
2368 | bool preeminent = TRUE; | |
2369 | AV *const av = (AV*)sv; | |
2370 | SV** svp; | |
2371 | ||
2372 | if (UNLIKELY(localizing)) { | |
2373 | MAGIC *mg; | |
2374 | HV *stash; | |
2375 | ||
2376 | /* If we can determine whether the element exist, | |
2377 | * Try to preserve the existenceness of a tied array | |
2378 | * element by using EXISTS and DELETE if possible. | |
2379 | * Fallback to FETCH and STORE otherwise. */ | |
2380 | if (SvCANEXISTDELETE(av)) | |
2381 | preeminent = av_exists(av, elem); | |
2382 | } | |
2383 | ||
2384 | svp = av_fetch(av, elem, lval && !defer); | |
2385 | ||
2386 | if (lval) { | |
2387 | if (!svp || !(sv = *svp)) { | |
2388 | IV len; | |
2389 | if (!defer) | |
2390 | DIE(aTHX_ PL_no_aelem, elem); | |
2391 | len = av_tindex(av); | |
2392 | sv = sv_2mortal(newSVavdefelem(av, | |
2393 | /* Resolve a negative index now, unless it points | |
2394 | * before the beginning of the array, in which | |
2395 | * case record it for error reporting in | |
2396 | * magic_setdefelem. */ | |
2397 | elem < 0 && len + elem >= 0 | |
2398 | ? len + elem : elem, 1)); | |
2399 | } | |
2400 | else { | |
2401 | if (UNLIKELY(localizing)) { | |
2402 | if (preeminent) { | |
2403 | save_aelem(av, elem, svp); | |
2404 | sv = *svp; /* may have changed */ | |
2405 | } | |
2406 | else | |
2407 | SAVEADELETE(av, elem); | |
2408 | } | |
2409 | } | |
2410 | } | |
2411 | else { | |
2412 | sv = (svp ? *svp : &PL_sv_undef); | |
2413 | /* see note in pp_helem() */ | |
2414 | if (SvRMAGICAL(av) && SvGMAGICAL(sv)) | |
2415 | mg_get(sv); | |
2416 | } | |
2417 | } | |
2418 | ||
2419 | } | |
2420 | finish: | |
2421 | { | |
2422 | dSP; | |
2423 | XPUSHs(sv); | |
2424 | RETURN; | |
2425 | } | |
2426 | /* NOTREACHED */ | |
2427 | ||
2428 | ||
2429 | ||
2430 | ||
2431 | case MDEREF_HV_padhv_helem: /* $lex{...} */ | |
2432 | sv = PAD_SVl((++items)->pad_offset); | |
2433 | goto do_HV_helem; | |
2434 | ||
2435 | case MDEREF_HV_gvhv_helem: /* $pkg{...} */ | |
2436 | sv = UNOP_AUX_item_sv(++items); | |
2437 | assert(isGV_with_GP(sv)); | |
2438 | sv = (SV*)GvHVn((GV*)sv); | |
2439 | goto do_HV_helem; | |
2440 | ||
2441 | case MDEREF_HV_pop_rv2hv_helem: /* expr->{...} */ | |
2442 | { | |
2443 | dSP; | |
2444 | sv = POPs; | |
2445 | PUTBACK; | |
2446 | goto do_HV_rv2hv_helem; | |
2447 | } | |
2448 | ||
2449 | case MDEREF_HV_gvsv_vivify_rv2hv_helem: /* $pkg->{...} */ | |
2450 | sv = UNOP_AUX_item_sv(++items); | |
2451 | assert(isGV_with_GP(sv)); | |
2452 | sv = GvSVn((GV*)sv); | |
2453 | goto do_HV_vivify_rv2hv_helem; | |
2454 | ||
2455 | case MDEREF_HV_padsv_vivify_rv2hv_helem: /* $lex->{...} */ | |
2456 | sv = PAD_SVl((++items)->pad_offset); | |
2457 | /* FALLTHROUGH */ | |
2458 | ||
2459 | do_HV_vivify_rv2hv_helem: | |
2460 | case MDEREF_HV_vivify_rv2hv_helem: /* vivify, ->{...} */ | |
2461 | /* this is the OPpDEREF action normally found at the end of | |
2462 | * ops like aelem, helem, rv2sv */ | |
2463 | sv = vivify_ref(sv, OPpDEREF_HV); | |
2464 | /* FALLTHROUGH */ | |
2465 | ||
2466 | do_HV_rv2hv_helem: | |
2467 | /* this is basically a copy of pp_rv2hv when it just has the | |
2468 | * sKR/1 flags (and pp_rv2hv is aliased to pp_rv2av) */ | |
2469 | ||
2470 | SvGETMAGIC(sv); | |
2471 | if (LIKELY(SvROK(sv))) { | |
2472 | if (UNLIKELY(SvAMAGIC(sv))) { | |
2473 | sv = amagic_deref_call(sv, to_hv_amg); | |
2474 | } | |
2475 | sv = SvRV(sv); | |
2476 | if (UNLIKELY(SvTYPE(sv) != SVt_PVHV)) | |
2477 | DIE(aTHX_ "Not a HASH reference"); | |
2478 | } | |
2479 | else if (SvTYPE(sv) != SVt_PVHV) { | |
2480 | if (!isGV_with_GP(sv)) | |
2481 | sv = (SV*)S_softref2xv_lite(aTHX_ sv, "a HASH", SVt_PVHV); | |
2482 | sv = MUTABLE_SV(GvHVn((GV*)sv)); | |
2483 | } | |
2484 | /* FALLTHROUGH */ | |
2485 | ||
2486 | do_HV_helem: | |
2487 | { | |
2488 | /* retrieve the key; this may be either a lexical / package | |
2489 | * var or a string constant, whose index/ptr is stored as an | |
2490 | * item | |
2491 | */ | |
2492 | SV *keysv = NULL; /* to shut up stupid compiler warnings */ | |
2493 | ||
2494 | assert(SvTYPE(sv) == SVt_PVHV); | |
2495 | ||
2496 | switch (actions & MDEREF_INDEX_MASK) { | |
2497 | case MDEREF_INDEX_none: | |
2498 | goto finish; | |
2499 | ||
2500 | case MDEREF_INDEX_const: | |
2501 | keysv = UNOP_AUX_item_sv(++items); | |
2502 | break; | |
2503 | ||
2504 | case MDEREF_INDEX_padsv: | |
2505 | keysv = PAD_SVl((++items)->pad_offset); | |
2506 | break; | |
2507 | ||
2508 | case MDEREF_INDEX_gvsv: | |
2509 | keysv = UNOP_AUX_item_sv(++items); | |
2510 | keysv = GvSVn((GV*)keysv); | |
2511 | break; | |
2512 | } | |
2513 | ||
2514 | /* see comment above about setting this var */ | |
2515 | PL_multideref_pc = items; | |
2516 | ||
2517 | ||
2518 | /* ensure that candidate CONSTs have been HEKified */ | |
2519 | assert( ((actions & MDEREF_INDEX_MASK) != MDEREF_INDEX_const) | |
2520 | || SvTYPE(keysv) >= SVt_PVMG | |
2521 | || !SvOK(keysv) | |
2522 | || SvROK(keysv) | |
2523 | || SvIsCOW_shared_hash(keysv)); | |
2524 | ||
2525 | /* this is basically a copy of pp_helem with OPpDEREF skipped */ | |
2526 | ||
2527 | if (!(actions & MDEREF_FLAG_last)) { | |
2528 | HE *he = hv_fetch_ent((HV*)sv, keysv, 1, 0); | |
2529 | if (!he || !(sv=HeVAL(he)) || sv == &PL_sv_undef) | |
2530 | DIE(aTHX_ PL_no_helem_sv, SVfARG(keysv)); | |
2531 | break; | |
2532 | } | |
2533 | ||
2534 | if (PL_op->op_private & | |
2535 | (OPpMULTIDEREF_EXISTS|OPpMULTIDEREF_DELETE)) | |
2536 | { | |
2537 | if (PL_op->op_private & OPpMULTIDEREF_EXISTS) { | |
2538 | sv = hv_exists_ent((HV*)sv, keysv, 0) | |
2539 | ? &PL_sv_yes : &PL_sv_no; | |
2540 | } | |
2541 | else { | |
2542 | I32 discard = (GIMME_V == G_VOID) ? G_DISCARD : 0; | |
2543 | sv = hv_delete_ent((HV*)sv, keysv, discard, 0); | |
2544 | if (discard) | |
2545 | return NORMAL; | |
2546 | if (!sv) | |
2547 | sv = &PL_sv_undef; | |
2548 | } | |
2549 | } | |
2550 | else { | |
2551 | const U32 lval = PL_op->op_flags & OPf_MOD || LVRET; | |
2552 | const U32 defer = PL_op->op_private & OPpLVAL_DEFER; | |
2553 | const bool localizing = PL_op->op_private & OPpLVAL_INTRO; | |
2554 | bool preeminent = TRUE; | |
2555 | SV **svp; | |
2556 | HV * const hv = (HV*)sv; | |
2557 | HE* he; | |
2558 | ||
2559 | if (UNLIKELY(localizing)) { | |
2560 | MAGIC *mg; | |
2561 | HV *stash; | |
2562 | ||
2563 | /* If we can determine whether the element exist, | |
2564 | * Try to preserve the existenceness of a tied hash | |
2565 | * element by using EXISTS and DELETE if possible. | |
2566 | * Fallback to FETCH and STORE otherwise. */ | |
2567 | if (SvCANEXISTDELETE(hv)) | |
2568 | preeminent = hv_exists_ent(hv, keysv, 0); | |
2569 | } | |
2570 | ||
2571 | he = hv_fetch_ent(hv, keysv, lval && !defer, 0); | |
2572 | svp = he ? &HeVAL(he) : NULL; | |
2573 | ||
2574 | ||
2575 | if (lval) { | |
2576 | if (!svp || !(sv = *svp) || sv == &PL_sv_undef) { | |
2577 | SV* lv; | |
2578 | SV* key2; | |
2579 | if (!defer) | |
2580 | DIE(aTHX_ PL_no_helem_sv, SVfARG(keysv)); | |
2581 | lv = sv_newmortal(); | |
2582 | sv_upgrade(lv, SVt_PVLV); | |
2583 | LvTYPE(lv) = 'y'; | |
2584 | sv_magic(lv, key2 = newSVsv(keysv), | |
2585 | PERL_MAGIC_defelem, NULL, 0); | |
2586 | /* sv_magic() increments refcount */ | |
2587 | SvREFCNT_dec_NN(key2); | |
0ad694a7 | 2588 | LvTARG(lv) = SvREFCNT_inc_simple_NN(hv); |
fedf30e1 DM |
2589 | LvTARGLEN(lv) = 1; |
2590 | sv = lv; | |
2591 | } | |
2592 | else { | |
2593 | if (localizing) { | |
2594 | if (HvNAME_get(hv) && isGV(sv)) | |
2595 | save_gp(MUTABLE_GV(sv), | |
2596 | !(PL_op->op_flags & OPf_SPECIAL)); | |
2597 | else if (preeminent) { | |
2598 | save_helem_flags(hv, keysv, svp, | |
2599 | (PL_op->op_flags & OPf_SPECIAL) | |
2600 | ? 0 : SAVEf_SETMAGIC); | |
2601 | sv = *svp; /* may have changed */ | |
2602 | } | |
2603 | else | |
2604 | SAVEHDELETE(hv, keysv); | |
2605 | } | |
2606 | } | |
2607 | } | |
2608 | else { | |
2609 | sv = (svp && *svp ? *svp : &PL_sv_undef); | |
2610 | /* see note in pp_helem() */ | |
2611 | if (SvRMAGICAL(hv) && SvGMAGICAL(sv)) | |
2612 | mg_get(sv); | |
2613 | } | |
2614 | } | |
2615 | goto finish; | |
2616 | } | |
2617 | ||
2618 | } /* switch */ | |
2619 | ||
2620 | actions >>= MDEREF_SHIFT; | |
2621 | } /* while */ | |
2622 | /* NOTREACHED */ | |
2623 | } | |
2624 | ||
2625 | ||
a0d0e21e LW |
2626 | PP(pp_iter) |
2627 | { | |
eb578fdb | 2628 | PERL_CONTEXT *cx; |
7d6c2cef | 2629 | SV *oldsv; |
1d7c1841 | 2630 | SV **itersvp; |
8a1f10dd | 2631 | SV *retsv; |
a0d0e21e | 2632 | |
84f05d57 JH |
2633 | SV *sv; |
2634 | AV *av; | |
2635 | IV ix; | |
2636 | IV inc; | |
2637 | ||
4ebe6e95 | 2638 | cx = CX_CUR(); |
1d7c1841 | 2639 | itersvp = CxITERVAR(cx); |
4b5c941e | 2640 | assert(itersvp); |
a48ce6be DM |
2641 | |
2642 | switch (CxTYPE(cx)) { | |
17c91640 | 2643 | |
b552b52c DM |
2644 | case CXt_LOOP_LAZYSV: /* string increment */ |
2645 | { | |
2646 | SV* cur = cx->blk_loop.state_u.lazysv.cur; | |
2647 | SV *end = cx->blk_loop.state_u.lazysv.end; | |
2648 | /* If the maximum is !SvOK(), pp_enteriter substitutes PL_sv_no. | |
2649 | It has SvPVX of "" and SvCUR of 0, which is what we want. */ | |
2650 | STRLEN maxlen = 0; | |
2651 | const char *max = SvPV_const(end, maxlen); | |
5d9574c1 | 2652 | if (UNLIKELY(SvNIOK(cur) || SvCUR(cur) > maxlen)) |
8a1f10dd | 2653 | goto retno; |
b552b52c DM |
2654 | |
2655 | oldsv = *itersvp; | |
6d3ca00e DM |
2656 | /* NB: on the first iteration, oldsv will have a ref count of at |
2657 | * least 2 (one extra from blk_loop.itersave), so the GV or pad | |
2658 | * slot will get localised; on subsequent iterations the RC==1 | |
2659 | * optimisation may kick in and the SV will be reused. */ | |
2660 | if (oldsv && LIKELY(SvREFCNT(oldsv) == 1 && !SvMAGICAL(oldsv))) { | |
b552b52c DM |
2661 | /* safe to reuse old SV */ |
2662 | sv_setsv(oldsv, cur); | |
a48ce6be | 2663 | } |
b552b52c DM |
2664 | else |
2665 | { | |
2666 | /* we need a fresh SV every time so that loop body sees a | |
2667 | * completely new SV for closures/references to work as | |
2668 | * they used to */ | |
2669 | *itersvp = newSVsv(cur); | |
6d3ca00e | 2670 | SvREFCNT_dec(oldsv); |
b552b52c DM |
2671 | } |
2672 | if (strEQ(SvPVX_const(cur), max)) | |
2673 | sv_setiv(cur, 0); /* terminate next time */ | |
2674 | else | |
2675 | sv_inc(cur); | |
2676 | break; | |
2677 | } | |
a48ce6be | 2678 | |
fcef60b4 DM |
2679 | case CXt_LOOP_LAZYIV: /* integer increment */ |
2680 | { | |
2681 | IV cur = cx->blk_loop.state_u.lazyiv.cur; | |
5d9574c1 | 2682 | if (UNLIKELY(cur > cx->blk_loop.state_u.lazyiv.end)) |
8a1f10dd | 2683 | goto retno; |
7f61b687 | 2684 | |
fcef60b4 | 2685 | oldsv = *itersvp; |
6d3ca00e DM |
2686 | /* see NB comment above */ |
2687 | if (oldsv && LIKELY(SvREFCNT(oldsv) == 1 && !SvMAGICAL(oldsv))) { | |
eaa5c2d6 | 2688 | /* safe to reuse old SV */ |
47b96a1e DM |
2689 | |
2690 | if ( (SvFLAGS(oldsv) & (SVTYPEMASK|SVf_THINKFIRST|SVf_IVisUV)) | |
2691 | == SVt_IV) | |
2692 | { | |
2693 | /* Cheap SvIOK_only(). | |
2694 | * Assert that flags which SvIOK_only() would test or | |
2695 | * clear can't be set, because we're SVt_IV */ | |
2696 | assert(!(SvFLAGS(oldsv) & | |
2697 | (SVf_OOK|SVf_UTF8|(SVf_OK & ~(SVf_IOK|SVp_IOK))))); | |
2698 | SvFLAGS(oldsv) |= (SVf_IOK|SVp_IOK); | |
2699 | /* SvIV_set() where sv_any points to head */ | |
2700 | oldsv->sv_u.svu_iv = cur; | |
2701 | ||
2702 | } | |
2703 | else | |
2704 | sv_setiv(oldsv, cur); | |
eaa5c2d6 | 2705 | } |
1c846c1f | 2706 | else |
eaa5c2d6 GA |
2707 | { |
2708 | /* we need a fresh SV every time so that loop body sees a | |
2709 | * completely new SV for closures/references to work as they | |
2710 | * used to */ | |
fcef60b4 | 2711 | *itersvp = newSViv(cur); |
6d3ca00e | 2712 | SvREFCNT_dec(oldsv); |
eaa5c2d6 | 2713 | } |
a2309040 | 2714 | |
5d9574c1 | 2715 | if (UNLIKELY(cur == IV_MAX)) { |
cdc1aa42 NC |
2716 | /* Handle end of range at IV_MAX */ |
2717 | cx->blk_loop.state_u.lazyiv.end = IV_MIN; | |
2718 | } else | |
2719 | ++cx->blk_loop.state_u.lazyiv.cur; | |
a48ce6be | 2720 | break; |
fcef60b4 | 2721 | } |
a48ce6be | 2722 | |
93661e56 DM |
2723 | case CXt_LOOP_LIST: /* for (1,2,3) */ |
2724 | ||
2725 | assert(OPpITER_REVERSED == 2); /* so inc becomes -1 or 1 */ | |
2726 | inc = 1 - (PL_op->op_private & OPpITER_REVERSED); | |
2727 | ix = (cx->blk_loop.state_u.stack.ix += inc); | |
2728 | if (UNLIKELY(inc > 0 | |
2729 | ? ix > cx->blk_oldsp | |
2730 | : ix <= cx->blk_loop.state_u.stack.basesp) | |
2731 | ) | |
8a1f10dd | 2732 | goto retno; |
93661e56 DM |
2733 | |
2734 | sv = PL_stack_base[ix]; | |
2735 | av = NULL; | |
2736 | goto loop_ary_common; | |
2737 | ||
2738 | case CXt_LOOP_ARY: /* for (@ary) */ | |
2739 | ||
2740 | av = cx->blk_loop.state_u.ary.ary; | |
2741 | inc = 1 - (PL_op->op_private & OPpITER_REVERSED); | |
2742 | ix = (cx->blk_loop.state_u.ary.ix += inc); | |
2743 | if (UNLIKELY(inc > 0 | |
2744 | ? ix > AvFILL(av) | |
2745 | : ix < 0) | |
2746 | ) | |
8a1f10dd | 2747 | goto retno; |
de080daa | 2748 | |
9d1ee8e0 | 2749 | if (UNLIKELY(SvRMAGICAL(av))) { |
a8a20bb6 DM |
2750 | SV * const * const svp = av_fetch(av, ix, FALSE); |
2751 | sv = svp ? *svp : NULL; | |
2752 | } | |
2753 | else { | |
2754 | sv = AvARRAY(av)[ix]; | |
de080daa | 2755 | } |
ef3e5ea9 | 2756 | |
93661e56 DM |
2757 | loop_ary_common: |
2758 | ||
d39c26a6 FC |
2759 | if (UNLIKELY(cx->cx_type & CXp_FOR_LVREF)) { |
2760 | SvSetMagicSV(*itersvp, sv); | |
2761 | break; | |
2762 | } | |
2763 | ||
5d9574c1 DM |
2764 | if (LIKELY(sv)) { |
2765 | if (UNLIKELY(SvIS_FREED(sv))) { | |
f38aa882 DM |
2766 | *itersvp = NULL; |
2767 | Perl_croak(aTHX_ "Use of freed value in iteration"); | |
2768 | } | |
60779a30 | 2769 | if (SvPADTMP(sv)) { |
8e079c2a | 2770 | sv = newSVsv(sv); |
60779a30 | 2771 | } |
8e079c2a FC |
2772 | else { |
2773 | SvTEMP_off(sv); | |
2774 | SvREFCNT_inc_simple_void_NN(sv); | |
2775 | } | |
de080daa | 2776 | } |
93661e56 | 2777 | else if (av) { |
199f858d | 2778 | sv = newSVavdefelem(av, ix, 0); |
de080daa | 2779 | } |
a600f7e6 FC |
2780 | else |
2781 | sv = &PL_sv_undef; | |
a0d0e21e | 2782 | |
de080daa DM |
2783 | oldsv = *itersvp; |
2784 | *itersvp = sv; | |
2785 | SvREFCNT_dec(oldsv); | |
de080daa | 2786 | break; |
a48ce6be DM |
2787 | |
2788 | default: | |
2789 | DIE(aTHX_ "panic: pp_iter, type=%u", CxTYPE(cx)); | |
2790 | } | |
8a1f10dd DM |
2791 | |
2792 | retsv = &PL_sv_yes; | |
2793 | if (0) { | |
2794 | retno: | |
2795 | retsv = &PL_sv_no; | |
2796 | } | |
2797 | /* pp_enteriter should have pre-extended the stack */ | |
2798 | assert(PL_stack_sp < PL_stack_max); | |
2799 | *++PL_stack_sp =retsv; | |
2800 | ||
2801 | return PL_op->op_next; | |
a0d0e21e LW |
2802 | } |
2803 | ||
ef07e810 DM |
2804 | /* |
2805 | A description of how taint works in pattern matching and substitution. | |
2806 | ||
284167a5 S |
2807 | This is all conditional on NO_TAINT_SUPPORT not being defined. Under |
2808 | NO_TAINT_SUPPORT, taint-related operations should become no-ops. | |
2809 | ||
4e19c54b | 2810 | While the pattern is being assembled/concatenated and then compiled, |
284167a5 S |
2811 | PL_tainted will get set (via TAINT_set) if any component of the pattern |
2812 | is tainted, e.g. /.*$tainted/. At the end of pattern compilation, | |
2813 | the RXf_TAINTED flag is set on the pattern if PL_tainted is set (via | |
1738e041 DM |
2814 | TAINT_get). It will also be set if any component of the pattern matches |
2815 | based on locale-dependent behavior. | |
ef07e810 | 2816 | |
0ab462a6 DM |
2817 | When the pattern is copied, e.g. $r = qr/..../, the SV holding the ref to |
2818 | the pattern is marked as tainted. This means that subsequent usage, such | |
284167a5 S |
2819 | as /x$r/, will set PL_tainted using TAINT_set, and thus RXf_TAINTED, |
2820 | on the new pattern too. | |
ef07e810 | 2821 | |
272d35c9 | 2822 | RXf_TAINTED_SEEN is used post-execution by the get magic code |
ef07e810 DM |
2823 | of $1 et al to indicate whether the returned value should be tainted. |
2824 | It is the responsibility of the caller of the pattern (i.e. pp_match, | |
2825 | pp_subst etc) to set this flag for any other circumstances where $1 needs | |
2826 | to be tainted. | |
2827 | ||
2828 | The taint behaviour of pp_subst (and pp_substcont) is quite complex. | |
2829 | ||
2830 | There are three possible sources of taint | |
2831 | * the source string | |
2832 | * the pattern (both compile- and run-time, RXf_TAINTED / RXf_TAINTED_SEEN) | |
2833 | * the replacement string (or expression under /e) | |
2834 | ||
2835 | There are four destinations of taint and they are affected by the sources | |
2836 | according to the rules below: | |
2837 | ||
2838 | * the return value (not including /r): | |
2839 | tainted by the source string and pattern, but only for the | |
2840 | number-of-iterations case; boolean returns aren't tainted; | |
2841 | * the modified string (or modified copy under /r): | |
2842 | tainted by the source string, pattern, and replacement strings; | |
2843 | * $1 et al: | |
2844 | tainted by the pattern, and under 'use re "taint"', by the source | |
2845 | string too; | |
2846 | * PL_taint - i.e. whether subsequent code (e.g. in a /e block) is tainted: | |
2847 | should always be unset before executing subsequent code. | |
2848 | ||
2849 | The overall action of pp_subst is: | |
2850 | ||
2851 | * at the start, set bits in rxtainted indicating the taint status of | |
2852 | the various sources. | |
2853 | ||
2854 | * After each pattern execution, update the SUBST_TAINT_PAT bit in | |
2855 | rxtainted if RXf_TAINTED_SEEN has been set, to indicate that the | |
2856 | pattern has subsequently become tainted via locale ops. | |
2857 | ||
2858 | * If control is being passed to pp_substcont to execute a /e block, | |
2859 | save rxtainted in the CXt_SUBST block, for future use by | |
2860 | pp_substcont. | |
2861 | ||
2862 | * Whenever control is being returned to perl code (either by falling | |
2863 | off the "end" of pp_subst/pp_substcont, or by entering a /e block), | |
2864 | use the flag bits in rxtainted to make all the appropriate types of | |
0ab462a6 DM |
2865 | destination taint visible; e.g. set RXf_TAINTED_SEEN so that $1 |
2866 | et al will appear tainted. | |
ef07e810 DM |
2867 | |
2868 | pp_match is just a simpler version of the above. | |
2869 | ||
2870 | */ | |
2871 | ||
a0d0e21e LW |
2872 | PP(pp_subst) |
2873 | { | |
20b7effb | 2874 | dSP; dTARG; |
eb578fdb | 2875 | PMOP *pm = cPMOP; |
a0d0e21e | 2876 | PMOP *rpm = pm; |
eb578fdb | 2877 | char *s; |
a0d0e21e | 2878 | char *strend; |
5c144d81 | 2879 | const char *c; |
a0d0e21e | 2880 | STRLEN clen; |
3c6ef0a5 FC |
2881 | SSize_t iters = 0; |
2882 | SSize_t maxiters; | |
a0d0e21e | 2883 | bool once; |
ef07e810 DM |
2884 | U8 rxtainted = 0; /* holds various SUBST_TAINT_* flag bits. |
2885 | See "how taint works" above */ | |
a0d0e21e | 2886 | char *orig; |
1ed74d04 | 2887 | U8 r_flags; |
eb578fdb | 2888 | REGEXP *rx = PM_GETRE(pm); |
a0d0e21e LW |
2889 | STRLEN len; |
2890 | int force_on_match = 0; | |
0bcc34c2 | 2891 | const I32 oldsave = PL_savestack_ix; |
792b2c16 | 2892 | STRLEN slen; |
26a74523 | 2893 | bool doutf8 = FALSE; /* whether replacement is in utf8 */ |
db2c6cb3 | 2894 | #ifdef PERL_ANY_COW |
106d9a13 | 2895 | bool was_cow; |
ed252734 | 2896 | #endif |
a0714e2c | 2897 | SV *nsv = NULL; |
b770e143 | 2898 | /* known replacement string? */ |
eb578fdb | 2899 | SV *dstr = (pm->op_pmflags & PMf_CONST) ? POPs : NULL; |
a0d0e21e | 2900 | |
f410a211 NC |
2901 | PERL_ASYNC_CHECK(); |
2902 | ||
533c011a | 2903 | if (PL_op->op_flags & OPf_STACKED) |
a0d0e21e | 2904 | TARG = POPs; |
6ffceeb7 | 2905 | else if (ARGTARG) |
59f00321 | 2906 | GETTARGET; |
a0d0e21e | 2907 | else { |
54b9620d | 2908 | TARG = DEFSV; |
a0d0e21e | 2909 | EXTEND(SP,1); |
1c846c1f | 2910 | } |
d9f424b2 | 2911 | |
64534138 | 2912 | SvGETMAGIC(TARG); /* must come before cow check */ |
db2c6cb3 | 2913 | #ifdef PERL_ANY_COW |
106d9a13 DM |
2914 | /* note that a string might get converted to COW during matching */ |
2915 | was_cow = cBOOL(SvIsCOW(TARG)); | |
ed252734 | 2916 | #endif |
d13a5d3b TC |
2917 | if (!(rpm->op_pmflags & PMf_NONDESTRUCT)) { |
2918 | #ifndef PERL_ANY_COW | |
2919 | if (SvIsCOW(TARG)) | |
2920 | sv_force_normal_flags(TARG,0); | |
2921 | #endif | |
2922 | if ((SvREADONLY(TARG) | |
2923 | || ( ((SvTYPE(TARG) == SVt_PVGV && isGV_with_GP(TARG)) | |
2924 | || SvTYPE(TARG) > SVt_PVLV) | |
2925 | && !(SvTYPE(TARG) == SVt_PVGV && SvFAKE(TARG))))) | |
2926 | Perl_croak_no_modify(); | |
2927 | } | |
8ec5e241 NIS |
2928 | PUTBACK; |
2929 | ||
6ac6605d DM |
2930 | orig = SvPV_nomg(TARG, len); |
2931 | /* note we don't (yet) force the var into being a string; if we fail | |
92711104 | 2932 | * to match, we leave as-is; on successful match however, we *will* |
6ac6605d | 2933 | * coerce into a string, then repeat the match */ |
4499db73 | 2934 | if (!SvPOKp(TARG) || SvTYPE(TARG) == SVt_PVGV || SvVOK(TARG)) |
a0d0e21e | 2935 | force_on_match = 1; |
20be6587 DM |
2936 | |
2937 | /* only replace once? */ | |
2938 | once = !(rpm->op_pmflags & PMf_GLOBAL); | |
2939 | ||
ef07e810 | 2940 | /* See "how taint works" above */ |
284167a5 | 2941 | if (TAINTING_get) { |
20be6587 DM |
2942 | rxtainted = ( |
2943 | (SvTAINTED(TARG) ? SUBST_TAINT_STR : 0) | |
284167a5 | 2944 | | (RX_ISTAINTED(rx) ? SUBST_TAINT_PAT : 0) |
20be6587 DM |
2945 | | ((pm->op_pmflags & PMf_RETAINT) ? SUBST_TAINT_RETAINT : 0) |
2946 | | ((once && !(rpm->op_pmflags & PMf_NONDESTRUCT)) | |
2947 | ? SUBST_TAINT_BOOLRET : 0)); | |
2948 | TAINT_NOT; | |
2949 | } | |
a12c0f56 | 2950 | |
a0d0e21e | 2951 | force_it: |
6ac6605d DM |
2952 | if (!pm || !orig) |
2953 | DIE(aTHX_ "panic: pp_subst, pm=%p, orig=%p", pm, orig); | |
a0d0e21e | 2954 | |
6ac6605d DM |
2955 | strend = orig + len; |
2956 | slen = DO_UTF8(TARG) ? utf8_length((U8*)orig, (U8*)strend) : len; | |
792b2c16 JH |
2957 | maxiters = 2 * slen + 10; /* We can match twice at each |
2958 | position, once with zero-length, | |
2959 | second time with non-zero. */ | |
a0d0e21e | 2960 | |
6a97c51d | 2961 | if (!RX_PRELEN(rx) && PL_curpm |
8d919b0a | 2962 | && !ReANY(rx)->mother_re) { |
3280af22 | 2963 | pm = PL_curpm; |
aaa362c4 | 2964 | rx = PM_GETRE(pm); |
a0d0e21e | 2965 | } |
6502e081 | 2966 | |
6e240d0b | 2967 | #ifdef PERL_SAWAMPERSAND |
6502e081 DM |
2968 | r_flags = ( RX_NPARENS(rx) |
2969 | || PL_sawampersand | |
6502e081 | 2970 | || (RX_EXTFLAGS(rx) & (RXf_EVAL_SEEN|RXf_PMf_KEEPCOPY)) |
5b0e71e9 | 2971 | || (rpm->op_pmflags & PMf_KEEPCOPY) |
6502e081 DM |
2972 | ) |
2973 | ? REXEC_COPY_STR | |
2974 | : 0; | |
6e240d0b FC |
2975 | #else |
2976 | r_flags = REXEC_COPY_STR; | |
2977 | #endif | |
7fba1cd6 | 2978 | |
0395280b | 2979 | if (!CALLREGEXEC(rx, orig, strend, orig, 0, TARG, NULL, r_flags)) |
8b64c330 | 2980 | { |
5e79dfb9 DM |
2981 | SPAGAIN; |
2982 | PUSHs(rpm->op_pmflags & PMf_NONDESTRUCT ? TARG : &PL_sv_no); | |
2983 | LEAVE_SCOPE(oldsave); | |
2984 | RETURN; | |
2985 | } | |
1754320d FC |
2986 | PL_curpm = pm; |
2987 | ||
71be2cbc | 2988 | /* known replacement string? */ |
f272994b | 2989 | if (dstr) { |
8514a05a JH |
2990 | /* replacement needing upgrading? */ |
2991 | if (DO_UTF8(TARG) && !doutf8) { | |
db79b45b | 2992 | nsv = sv_newmortal(); |
4a176938 | 2993 | SvSetSV(nsv, dstr); |
47e13f24 | 2994 | if (IN_ENCODING) |
ad2de1b2 | 2995 | sv_recode_to_utf8(nsv, _get_encoding()); |
8514a05a JH |
2996 | else |
2997 | sv_utf8_upgrade(nsv); | |
5c144d81 | 2998 | c = SvPV_const(nsv, clen); |
4a176938 JH |
2999 | doutf8 = TRUE; |
3000 | } | |
3001 | else { | |
5c144d81 | 3002 | c = SvPV_const(dstr, clen); |
4a176938 | 3003 | doutf8 = DO_UTF8(dstr); |
8514a05a | 3004 | } |
bb933b9b FC |
3005 | |
3006 | if (SvTAINTED(dstr)) | |
3007 | rxtainted |= SUBST_TAINT_REPL; | |
f272994b A |
3008 | } |
3009 | else { | |
6136c704 | 3010 | c = NULL; |
f272994b A |
3011 | doutf8 = FALSE; |
3012 | } | |
3013 | ||
71be2cbc | 3014 | /* can do inplace substitution? */ |
ed252734 | 3015 | if (c |
db2c6cb3 | 3016 | #ifdef PERL_ANY_COW |
106d9a13 | 3017 | && !was_cow |
ed252734 | 3018 | #endif |
fbfb1899 | 3019 | && (I32)clen <= RX_MINLENRET(rx) |
9cefd268 FC |
3020 | && ( once |
3021 | || !(r_flags & REXEC_COPY_STR) | |
3022 | || (!SvGMAGICAL(dstr) && !(RX_EXTFLAGS(rx) & RXf_EVAL_SEEN)) | |
3023 | ) | |
dbc200c5 | 3024 | && !(RX_EXTFLAGS(rx) & RXf_NO_INPLACE_SUBST) |
8ca8a454 NC |
3025 | && (!doutf8 || SvUTF8(TARG)) |
3026 | && !(rpm->op_pmflags & PMf_NONDESTRUCT)) | |
8b030b38 | 3027 | { |
ec911639 | 3028 | |
db2c6cb3 | 3029 | #ifdef PERL_ANY_COW |
106d9a13 | 3030 | /* string might have got converted to COW since we set was_cow */ |
ed252734 | 3031 | if (SvIsCOW(TARG)) { |
f7a8268c | 3032 | if (!force_on_match) |
ed252734 | 3033 | goto have_a_cow; |
f7a8268c | 3034 | assert(SvVOK(TARG)); |
ed252734 NC |
3035 | } |
3036 | #endif | |
71be2cbc | 3037 | if (force_on_match) { |
6ac6605d DM |
3038 | /* redo the first match, this time with the orig var |
3039 | * forced into being a string */ | |
71be2cbc | 3040 | force_on_match = 0; |
6ac6605d | 3041 | orig = SvPV_force_nomg(TARG, len); |
71be2cbc | 3042 | goto force_it; |
3043 | } | |
39b40493 | 3044 | |
71be2cbc | 3045 | if (once) { |
c67ab8f2 | 3046 | char *d, *m; |
20be6587 DM |
3047 | if (RX_MATCH_TAINTED(rx)) /* run time pattern taint, eg locale */ |
3048 | rxtainted |= SUBST_TAINT_PAT; | |
07bc277f NC |
3049 | m = orig + RX_OFFS(rx)[0].start; |
3050 | d = orig + RX_OFFS(rx)[0].end; | |
71be2cbc | 3051 | s = orig; |
3052 | if (m - s > strend - d) { /* faster to shorten from end */ | |
2ec7214c | 3053 | I32 i; |
71be2cbc | 3054 | if (clen) { |
3055 | Copy(c, m, clen, char); | |
3056 | m += clen; | |
a0d0e21e | 3057 | } |
71be2cbc | 3058 | i = strend - d; |
3059 | if (i > 0) { | |
3060 | Move(d, m, i, char); | |
3061 | m += i; | |
a0d0e21e | 3062 | } |
71be2cbc | 3063 | *m = '\0'; |
3064 | SvCUR_set(TARG, m - s); | |
3065 | } | |
2ec7214c DM |
3066 | else { /* faster from front */ |
3067 | I32 i = m - s; | |
71be2cbc | 3068 | d -= clen; |
2ec7214c DM |
3069 | if (i > 0) |
3070 | Move(s, d - i, i, char); | |
71be2cbc | 3071 | sv_chop(TARG, d-i); |
71be2cbc | 3072 | if (clen) |
c947cd8d | 3073 | Copy(c, d, clen, char); |
71be2cbc | 3074 | } |
8ec5e241 | 3075 | SPAGAIN; |
8ca8a454 | 3076 | PUSHs(&PL_sv_yes); |
71be2cbc | 3077 | } |
3078 | else { | |
c67ab8f2 | 3079 | char *d, *m; |
0395280b | 3080 | d = s = RX_OFFS(rx)[0].start + orig; |
71be2cbc | 3081 | do { |
2b25edcf | 3082 | I32 i; |
5d9574c1 | 3083 | if (UNLIKELY(iters++ > maxiters)) |
cea2e8a9 | 3084 | DIE(aTHX_ "Substitution loop"); |
5d9574c1 | 3085 | if (UNLIKELY(RX_MATCH_TAINTED(rx))) /* run time pattern taint, eg locale */ |
20be6587 | 3086 | rxtainted |= SUBST_TAINT_PAT; |
07bc277f | 3087 | m = RX_OFFS(rx)[0].start + orig; |
155aba94 | 3088 | if ((i = m - s)) { |
71be2cbc | 3089 | if (s != d) |
3090 | Move(s, d, i, char); | |
3091 | d += i; | |
a0d0e21e | 3092 | } |
71be2cbc | 3093 | if (clen) { |
3094 | Copy(c, d, clen, char); | |
3095 | d += clen; | |
3096 | } | |
07bc277f | 3097 | s = RX_OFFS(rx)[0].end + orig; |
7ce41e5c FC |
3098 | } while (CALLREGEXEC(rx, s, strend, orig, |
3099 | s == m, /* don't match same null twice */ | |
f722798b | 3100 | TARG, NULL, |
d5e7783a | 3101 | REXEC_NOT_FIRST|REXEC_IGNOREPOS|REXEC_FAIL_ON_UNDERFLOW)); |
71be2cbc | 3102 | if (s != d) { |
2b25edcf | 3103 | I32 i = strend - s; |
aa07b2f6 | 3104 | SvCUR_set(TARG, d - SvPVX_const(TARG) + i); |
71be2cbc | 3105 | Move(s, d, i+1, char); /* include the NUL */ |
a0d0e21e | 3106 | } |
8ec5e241 | 3107 | SPAGAIN; |
3c6ef0a5 | 3108 | mPUSHi(iters); |
a0d0e21e LW |
3109 | } |
3110 | } | |
ff6e92e8 | 3111 | else { |
1754320d | 3112 | bool first; |
c67ab8f2 | 3113 | char *m; |
1754320d | 3114 | SV *repl; |
a0d0e21e | 3115 | if (force_on_match) { |
6ac6605d DM |
3116 | /* redo the first match, this time with the orig var |
3117 | * forced into being a string */ | |
a0d0e21e | 3118 | force_on_match = 0; |
0c1438a1 NC |
3119 | if (rpm->op_pmflags & PMf_NONDESTRUCT) { |
3120 | /* I feel that it should be possible to avoid this mortal copy | |
3121 | given that the code below copies into a new destination. | |
3122 | However, I suspect it isn't worth the complexity of | |
3123 | unravelling the C<goto force_it> for the small number of | |
3124 | cases where it would be viable to drop into the copy code. */ | |
3125 | TARG = sv_2mortal(newSVsv(TARG)); | |
3126 | } | |
6ac6605d | 3127 | orig = SvPV_force_nomg(TARG, len); |
a0d0e21e LW |
3128 | goto force_it; |
3129 | } | |
db2c6cb3 | 3130 | #ifdef PERL_ANY_COW |
ed252734 NC |
3131 | have_a_cow: |
3132 | #endif | |
20be6587 DM |
3133 | if (RX_MATCH_TAINTED(rx)) /* run time pattern taint, eg locale */ |
3134 | rxtainted |= SUBST_TAINT_PAT; | |
1754320d | 3135 | repl = dstr; |
0395280b DM |
3136 | s = RX_OFFS(rx)[0].start + orig; |
3137 | dstr = newSVpvn_flags(orig, s-orig, | |
3138 | SVs_TEMP | (DO_UTF8(TARG) ? SVf_UTF8 : 0)); | |
a0d0e21e | 3139 | if (!c) { |
eb578fdb | 3140 | PERL_CONTEXT *cx; |
8ec5e241 | 3141 | SPAGAIN; |
0395280b | 3142 | m = orig; |
20be6587 DM |
3143 | /* note that a whole bunch of local vars are saved here for |
3144 | * use by pp_substcont: here's a list of them in case you're | |
3145 | * searching for places in this sub that uses a particular var: | |
3146 | * iters maxiters r_flags oldsave rxtainted orig dstr targ | |
3147 | * s m strend rx once */ | |
490576d1 | 3148 | CX_PUSHSUBST(cx); |
20e98b0f | 3149 | RETURNOP(cPMOP->op_pmreplrootu.op_pmreplroot); |
a0d0e21e | 3150 | } |
1754320d | 3151 | first = TRUE; |
a0d0e21e | 3152 | do { |
5d9574c1 | 3153 | if (UNLIKELY(iters++ > maxiters)) |
cea2e8a9 | 3154 | DIE(aTHX_ "Substitution loop"); |
5d9574c1 | 3155 | if (UNLIKELY(RX_MATCH_TAINTED(rx))) |
20be6587 | 3156 | rxtainted |= SUBST_TAINT_PAT; |
07bc277f | 3157 | if (RX_MATCH_COPIED(rx) && RX_SUBBEG(rx) != orig) { |
c67ab8f2 DM |
3158 | char *old_s = s; |
3159 | char *old_orig = orig; | |
6502e081 | 3160 | assert(RX_SUBOFFSET(rx) == 0); |
c67ab8f2 | 3161 | |
07bc277f | 3162 | orig = RX_SUBBEG(rx); |
c67ab8f2 DM |
3163 | s = orig + (old_s - old_orig); |
3164 | strend = s + (strend - old_s); | |
a0d0e21e | 3165 | } |
07bc277f | 3166 | m = RX_OFFS(rx)[0].start + orig; |
64534138 | 3167 | sv_catpvn_nomg_maybeutf8(dstr, s, m - s, DO_UTF8(TARG)); |
07bc277f | 3168 | s = RX_OFFS(rx)[0].end + orig; |
1754320d FC |
3169 | if (first) { |
3170 | /* replacement already stringified */ | |
3171 | if (clen) | |
64534138 | 3172 | sv_catpvn_nomg_maybeutf8(dstr, c, clen, doutf8); |
1754320d FC |
3173 | first = FALSE; |
3174 | } | |
3175 | else { | |
47e13f24 | 3176 | if (IN_ENCODING) { |
1754320d FC |
3177 | if (!nsv) nsv = sv_newmortal(); |
3178 | sv_copypv(nsv, repl); | |
ad2de1b2 | 3179 | if (!DO_UTF8(nsv)) sv_recode_to_utf8(nsv, _get_encoding()); |
1754320d FC |
3180 | sv_catsv(dstr, nsv); |
3181 | } | |
3182 | else sv_catsv(dstr, repl); | |
5d9574c1 | 3183 | if (UNLIKELY(SvTAINTED(repl))) |
bb933b9b | 3184 | rxtainted |= SUBST_TAINT_REPL; |
1754320d | 3185 | } |
a0d0e21e LW |
3186 | if (once) |
3187 | break; | |
ff27773b KW |
3188 | } while (CALLREGEXEC(rx, s, strend, orig, |
3189 | s == m, /* Yields minend of 0 or 1 */ | |
d5e7783a DM |
3190 | TARG, NULL, |
3191 | REXEC_NOT_FIRST|REXEC_IGNOREPOS|REXEC_FAIL_ON_UNDERFLOW)); | |
aba224f7 | 3192 | assert(strend >= s); |
64534138 | 3193 | sv_catpvn_nomg_maybeutf8(dstr, s, strend - s, DO_UTF8(TARG)); |
748a9306 | 3194 | |
8ca8a454 NC |
3195 | if (rpm->op_pmflags & PMf_NONDESTRUCT) { |
3196 | /* From here on down we're using the copy, and leaving the original | |
3197 | untouched. */ | |
3198 | TARG = dstr; | |
3199 | SPAGAIN; | |
3200 | PUSHs(dstr); | |
3201 | } else { | |
db2c6cb3 | 3202 | #ifdef PERL_ANY_COW |
8ca8a454 NC |
3203 | /* The match may make the string COW. If so, brilliant, because |
3204 | that's just saved us one malloc, copy and free - the regexp has | |
3205 | donated the old buffer, and we malloc an entirely new one, rather | |
3206 | than the regexp malloc()ing a buffer and copying our original, | |
3207 | only for us to throw it away here during the substitution. */ | |
3208 | if (SvIsCOW(TARG)) { | |
3209 | sv_force_normal_flags(TARG, SV_COW_DROP_PV); | |
3210 | } else | |
ed252734 | 3211 | #endif |
8ca8a454 NC |
3212 | { |
3213 | SvPV_free(TARG); | |
3214 | } | |
3215 | SvPV_set(TARG, SvPVX(dstr)); | |
3216 | SvCUR_set(TARG, SvCUR(dstr)); | |
3217 | SvLEN_set(TARG, SvLEN(dstr)); | |
64534138 | 3218 | SvFLAGS(TARG) |= SvUTF8(dstr); |
8ca8a454 | 3219 | SvPV_set(dstr, NULL); |
748a9306 | 3220 | |
8ca8a454 | 3221 | SPAGAIN; |
3c6ef0a5 | 3222 | mPUSHi(iters); |
8ca8a454 NC |
3223 | } |
3224 | } | |
3225 | ||
3226 | if (!(rpm->op_pmflags & PMf_NONDESTRUCT)) { | |
3227 | (void)SvPOK_only_UTF8(TARG); | |
a0d0e21e | 3228 | } |
20be6587 | 3229 | |
ef07e810 | 3230 | /* See "how taint works" above */ |
284167a5 | 3231 | if (TAINTING_get) { |
20be6587 DM |
3232 | if ((rxtainted & SUBST_TAINT_PAT) || |
3233 | ((rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_RETAINT)) == | |
3234 | (SUBST_TAINT_STR|SUBST_TAINT_RETAINT)) | |
3235 | ) | |
3236 | (RX_MATCH_TAINTED_on(rx)); /* taint $1 et al */ | |
3237 | ||
3238 | if (!(rxtainted & SUBST_TAINT_BOOLRET) | |
3239 | && (rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_PAT)) | |
3240 | ) | |
3241 | SvTAINTED_on(TOPs); /* taint return value */ | |
3242 | else | |
3243 | SvTAINTED_off(TOPs); /* may have got tainted earlier */ | |
3244 | ||
3245 | /* needed for mg_set below */ | |
284167a5 S |
3246 | TAINT_set( |
3247 | cBOOL(rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_PAT|SUBST_TAINT_REPL)) | |
3248 | ); | |
20be6587 DM |
3249 | SvTAINT(TARG); |
3250 | } | |
3251 | SvSETMAGIC(TARG); /* PL_tainted must be correctly set for this mg_set */ | |
3252 | TAINT_NOT; | |
f1a76097 DM |
3253 | LEAVE_SCOPE(oldsave); |
3254 | RETURN; | |
a0d0e21e LW |
3255 | } |
3256 | ||
3257 | PP(pp_grepwhile) | |
3258 | { | |
20b7effb | 3259 | dSP; |
a0d0e21e LW |
3260 | |
3261 | if (SvTRUEx(POPs)) | |
3280af22 NIS |
3262 | PL_stack_base[PL_markstack_ptr[-1]++] = PL_stack_base[*PL_markstack_ptr]; |
3263 | ++*PL_markstack_ptr; | |
b2a2a901 | 3264 | FREETMPS; |
d343c3ef | 3265 | LEAVE_with_name("grep_item"); /* exit inner scope */ |
a0d0e21e LW |
3266 | |
3267 | /* All done yet? */ | |
5d9574c1 | 3268 | if (UNLIKELY(PL_stack_base + *PL_markstack_ptr > SP)) { |
a0d0e21e | 3269 | I32 items; |
1c23e2bd | 3270 | const U8 gimme = GIMME_V; |
a0d0e21e | 3271 | |
d343c3ef | 3272 | LEAVE_with_name("grep"); /* exit outer scope */ |
a0d0e21e | 3273 | (void)POPMARK; /* pop src */ |
3280af22 | 3274 | items = --*PL_markstack_ptr - PL_markstack_ptr[-1]; |
a0d0e21e | 3275 | (void)POPMARK; /* pop dst */ |
3280af22 | 3276 | SP = PL_stack_base + POPMARK; /* pop original mark */ |
54310121 | 3277 | if (gimme == G_SCALAR) { |
7cc47870 RGS |
3278 | dTARGET; |
3279 | XPUSHi(items); | |
a0d0e21e | 3280 | } |
54310121 | 3281 | else if (gimme == G_ARRAY) |
3282 | SP += items; | |
a0d0e21e LW |
3283 | RETURN; |
3284 | } | |
3285 | else { | |
3286 | SV *src; | |
3287 | ||
d343c3ef | 3288 | ENTER_with_name("grep_item"); /* enter inner scope */ |
1d7c1841 | 3289 | SAVEVPTR(PL_curpm); |
a0d0e21e | 3290 | |
6cae08a8 | 3291 | src = PL_stack_base[TOPMARK]; |
60779a30 | 3292 | if (SvPADTMP(src)) { |
6cae08a8 | 3293 | src = PL_stack_base[TOPMARK] = sv_mortalcopy(src); |
a0ed822e FC |
3294 | PL_tmps_floor++; |
3295 | } | |
a0d0e21e | 3296 | SvTEMP_off(src); |
ffd49c98 | 3297 | DEFSV_set(src); |
a0d0e21e LW |
3298 | |
3299 | RETURNOP(cLOGOP->op_other); | |
3300 | } | |
3301 | } | |
3302 | ||
799da9d7 | 3303 | /* leave_adjust_stacks(): |
f7a874b8 | 3304 | * |
e02ce34b DM |
3305 | * Process a scope's return args (in the range from_sp+1 .. PL_stack_sp), |
3306 | * positioning them at to_sp+1 onwards, and do the equivalent of a | |
3307 | * FREEMPS and TAINT_NOT. | |
3308 | * | |
f7a874b8 DM |
3309 | * Not intended to be called in void context. |
3310 | * | |
799da9d7 DM |
3311 | * When leaving a sub, eval, do{} or other scope, the things that need |
3312 | * doing to process the return args are: | |
f7a874b8 | 3313 | * * in scalar context, only return the last arg (or PL_sv_undef if none); |
799da9d7 DM |
3314 | * * for the types of return that return copies of their args (such |
3315 | * as rvalue sub return), make a mortal copy of every return arg, | |
3316 | * except where we can optimise the copy away without it being | |
3317 | * semantically visible; | |
3318 | * * make sure that the arg isn't prematurely freed; in the case of an | |
3319 | * arg not copied, this may involve mortalising it. For example, in | |
f7a874b8 DM |
3320 | * C<sub f { my $x = ...; $x }>, $x would be freed when we do |
3321 | * CX_LEAVE_SCOPE(cx) unless it's protected or copied. | |
3322 | * | |
799da9d7 DM |
3323 | * What condition to use when deciding whether to pass the arg through |
3324 | * or make a copy, is determined by the 'pass' arg; its valid values are: | |
3325 | * 0: rvalue sub/eval exit | |
3326 | * 1: other rvalue scope exit | |
3327 | * 2: :lvalue sub exit in rvalue context | |
3328 | * 3: :lvalue sub exit in lvalue context and other lvalue scope exits | |
3329 | * | |
f7a874b8 | 3330 | * There is a big issue with doing a FREETMPS. We would like to free any |
799da9d7 | 3331 | * temps created by the last statement which the sub executed, rather than |
f7a874b8 DM |
3332 | * leaving them for the caller. In a situation where a sub call isn't |
3333 | * soon followed by a nextstate (e.g. nested recursive calls, a la | |
3334 | * fibonacci()), temps can accumulate, causing memory and performance | |
3335 | * issues. | |
3336 | * | |
3337 | * On the other hand, we don't want to free any TEMPs which are keeping | |
799da9d7 DM |
3338 | * alive any return args that we skipped copying; nor do we wish to undo |
3339 | * any mortalising done here. | |
f7a874b8 DM |
3340 | * |
3341 | * The solution is to split the temps stack frame into two, with a cut | |
3342 | * point delineating the two halves. We arrange that by the end of this | |
3343 | * function, all the temps stack frame entries we wish to keep are in the | |
799da9d7 | 3344 | * range PL_tmps_floor+1.. tmps_base-1, while the ones to free now are in |
f7a874b8 DM |
3345 | * the range tmps_base .. PL_tmps_ix. During the course of this |
3346 | * function, tmps_base starts off as PL_tmps_floor+1, then increases | |
3347 | * whenever we find or create a temp that we know should be kept. In | |
3348 | * general the stuff above tmps_base is undecided until we reach the end, | |
3349 | * and we may need a sort stage for that. | |
3350 | * | |
3351 | * To determine whether a TEMP is keeping a return arg alive, every | |
3352 | * arg that is kept rather than copied and which has the SvTEMP flag | |
3353 | * set, has the flag temporarily unset, to mark it. At the end we scan | |
799da9d7 | 3354 | * the temps stack frame above the cut for entries without SvTEMP and |
f7a874b8 | 3355 | * keep them, while turning SvTEMP on again. Note that if we die before |
799da9d7 | 3356 | * the SvTEMPs flags are set again, its safe: at worst, subsequent use of |
f7a874b8 DM |
3357 | * those SVs may be slightly less efficient. |
3358 | * | |
3359 | * In practice various optimisations for some common cases mean we can | |
3360 | * avoid most of the scanning and swapping about with the temps stack. | |
3361 | */ | |
3362 | ||
799da9d7 | 3363 | void |
1c23e2bd | 3364 | Perl_leave_adjust_stacks(pTHX_ SV **from_sp, SV **to_sp, U8 gimme, int pass) |
a0d0e21e | 3365 | { |
263e0548 | 3366 | dVAR; |
20b7effb | 3367 | dSP; |
f7a874b8 DM |
3368 | SSize_t tmps_base; /* lowest index into tmps stack that needs freeing now */ |
3369 | SSize_t nargs; | |
3370 | ||
799da9d7 DM |
3371 | PERL_ARGS_ASSERT_LEAVE_ADJUST_STACKS; |
3372 | ||
f7a874b8 DM |
3373 | TAINT_NOT; |
3374 | ||
3375 | if (gimme == G_ARRAY) { | |
e02ce34b DM |
3376 | nargs = SP - from_sp; |
3377 | from_sp++; | |
f7a874b8 DM |
3378 | } |
3379 | else { | |
3380 | assert(gimme == G_SCALAR); | |
e02ce34b | 3381 | if (UNLIKELY(from_sp >= SP)) { |
f7a874b8 | 3382 | /* no return args */ |
e02ce34b | 3383 | assert(from_sp == SP); |
f7a874b8 DM |
3384 | EXTEND(SP, 1); |
3385 | *++SP = &PL_sv_undef; | |
e02ce34b | 3386 | to_sp = SP; |
f7a874b8 DM |
3387 | nargs = 0; |
3388 | } | |
3389 | else { | |
3390 | from_sp = SP; | |
3391 | nargs = 1; | |
3392 | } | |
3393 | } | |
3394 | ||
3395 | /* common code for G_SCALAR and G_ARRAY */ | |
3396 | ||
3397 | tmps_base = PL_tmps_floor + 1; | |
3398 | ||
3399 | assert(nargs >= 0); | |
3400 | if (nargs) { | |
3401 | /* pointer version of tmps_base. Not safe across temp stack | |
3402 | * reallocs. */ | |
3403 | SV **tmps_basep; | |
3404 | ||
3405 | EXTEND_MORTAL(nargs); /* one big extend for worst-case scenario */ | |
3406 | tmps_basep = PL_tmps_stack + tmps_base; | |
f7a874b8 DM |
3407 | |
3408 | /* process each return arg */ | |
3409 | ||
3410 | do { | |
3411 | SV *sv = *from_sp++; | |
3412 | ||
3413 | assert(PL_tmps_ix + nargs < PL_tmps_max); | |
3645bb38 DM |
3414 | #ifdef DEBUGGING |
3415 | /* PADTMPs with container set magic shouldn't appear in the | |
3416 | * wild. This assert is more important for pp_leavesublv(), | |
3417 | * but by testing for it here, we're more likely to catch | |
3418 | * bad cases (what with :lvalue subs not being widely | |
3419 | * deployed). The two issues are that for something like | |
3420 | * sub :lvalue { $tied{foo} } | |
3421 | * or | |
3422 | * sub :lvalue { substr($foo,1,2) } | |
3423 | * pp_leavesublv() will croak if the sub returns a PADTMP, | |
3424 | * and currently functions like pp_substr() return a mortal | |
3425 | * rather than using their PADTMP when returning a PVLV. | |
3426 | * This is because the PVLV will hold a ref to $foo, | |
3427 | * so $foo would get delayed in being freed while | |
3428 | * the PADTMP SV remained in the PAD. | |
3429 | * So if this assert fails it means either: | |
3430 | * 1) there is pp code similar to pp_substr that is | |
3431 | * returning a PADTMP instead of a mortal, and probably | |
3432 | * needs fixing, or | |
5d9c1c9a | 3433 | * 2) pp_leavesublv is making unwarranted assumptions |
3645bb38 DM |
3434 | * about always croaking on a PADTMP |
3435 | */ | |
3436 | if (SvPADTMP(sv) && SvSMAGICAL(sv)) { | |
3437 | MAGIC *mg; | |
3438 | for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) { | |
3439 | assert(PERL_MAGIC_TYPE_IS_VALUE_MAGIC(mg->mg_type)); | |
3440 | } | |
3441 | } | |
3442 | #endif | |
f7a874b8 | 3443 | |
799da9d7 DM |
3444 | if ( |
3445 | pass == 0 ? (SvTEMP(sv) && !SvMAGICAL(sv) && SvREFCNT(sv) == 1) | |
3446 | : pass == 1 ? ((SvTEMP(sv) || SvPADTMP(sv)) && !SvMAGICAL(sv) && SvREFCNT(sv) == 1) | |
3447 | : pass == 2 ? (!SvPADTMP(sv)) | |
3448 | : 1) | |
3449 | { | |
3450 | /* pass through: skip copy for logic or optimisation | |
3451 | * reasons; instead mortalise it, except that ... */ | |
e02ce34b | 3452 | *++to_sp = sv; |
f7a874b8 | 3453 | |
799da9d7 DM |
3454 | if (SvTEMP(sv)) { |
3455 | /* ... since this SV is an SvTEMP , we don't need to | |
3456 | * re-mortalise it; instead we just need to ensure | |
3457 | * that its existing entry in the temps stack frame | |
3458 | * ends up below the cut and so avoids being freed | |
3459 | * this time round. We mark it as needing to be kept | |
3460 | * by temporarily unsetting SvTEMP; then at the end, | |
3461 | * we shuffle any !SvTEMP entries on the tmps stack | |
3462 | * back below the cut. | |
3463 | * However, there's a significant chance that there's | |
3464 | * a 1:1 correspondence between the first few (or all) | |
3465 | * elements in the return args stack frame and those | |
3466 | * in the temps stack frame; e,g.: | |
3467 | * sub f { ....; map {...} .... }, | |
3468 | * or if we're exiting multiple scopes and one of the | |
3469 | * inner scopes has already made mortal copies of each | |
3470 | * return arg. | |
3471 | * | |
3472 | * If so, this arg sv will correspond to the next item | |
3473 | * on the tmps stack above the cut, and so can be kept | |
3474 | * merely by moving the cut boundary up one, rather | |
3475 | * than messing with SvTEMP. If all args are 1:1 then | |
3476 | * we can avoid the sorting stage below completely. | |
977d0c81 DM |
3477 | * |
3478 | * If there are no items above the cut on the tmps | |
3479 | * stack, then the SvTEMP must comne from an item | |
3480 | * below the cut, so there's nothing to do. | |
799da9d7 | 3481 | */ |
977d0c81 DM |
3482 | if (tmps_basep <= &PL_tmps_stack[PL_tmps_ix]) { |
3483 | if (sv == *tmps_basep) | |
3484 | tmps_basep++; | |
3485 | else | |
3486 | SvTEMP_off(sv); | |
3487 | } | |
799da9d7 | 3488 | } |
75bc488d | 3489 | else if (!SvPADTMP(sv)) { |
799da9d7 | 3490 | /* mortalise arg to avoid it being freed during save |
75bc488d | 3491 | * stack unwinding. Pad tmps don't need mortalising as |
977d0c81 DM |
3492 | * they're never freed. This is the equivalent of |
3493 | * sv_2mortal(SvREFCNT_inc(sv)), except that: | |
799da9d7 DM |
3494 | * * it assumes that the temps stack has already been |
3495 | * extended; | |
3496 | * * it puts the new item at the cut rather than at | |
3497 | * ++PL_tmps_ix, moving the previous occupant there | |
3498 | * instead. | |
3499 | */ | |
3500 | if (!SvIMMORTAL(sv)) { | |
977d0c81 | 3501 | SvREFCNT_inc_simple_void_NN(sv); |
799da9d7 | 3502 | SvTEMP_on(sv); |
977d0c81 DM |
3503 | /* Note that if there's nothing above the cut, |
3504 | * this copies the garbage one slot above | |
3505 | * PL_tmps_ix onto itself. This is harmless (the | |
3506 | * stack's already been extended), but might in | |
3507 | * theory trigger warnings from tools like ASan | |
3508 | */ | |
799da9d7 DM |
3509 | PL_tmps_stack[++PL_tmps_ix] = *tmps_basep; |
3510 | *tmps_basep++ = sv; | |
3511 | } | |
3512 | } | |
f7a874b8 DM |
3513 | } |
3514 | else { | |
3515 | /* Make a mortal copy of the SV. | |
3516 | * The following code is the equivalent of sv_mortalcopy() | |
3517 | * except that: | |
3518 | * * it assumes the temps stack has already been extended; | |
3519 | * * it optimises the copying for some simple SV types; | |
3520 | * * it puts the new item at the cut rather than at | |
3521 | * ++PL_tmps_ix, moving the previous occupant there | |
3522 | * instead. | |
3523 | */ | |
3524 | SV *newsv = newSV(0); | |
3525 | ||
3526 | PL_tmps_stack[++PL_tmps_ix] = *tmps_basep; | |
3527 | /* put it on the tmps stack early so it gets freed if we die */ | |
3528 | *tmps_basep++ = newsv; | |
e02ce34b | 3529 | *++to_sp = newsv; |
f7a874b8 DM |
3530 | |
3531 | if (SvTYPE(sv) <= SVt_IV) { | |
3532 | /* arg must be one of undef, IV/UV, or RV: skip | |
3533 | * sv_setsv_flags() and do the copy directly */ | |
3534 | U32 dstflags; | |
3535 | U32 srcflags = SvFLAGS(sv); | |
3536 | ||
3537 | assert(!SvGMAGICAL(sv)); | |
3538 | if (srcflags & (SVf_IOK|SVf_ROK)) { | |
3539 | SET_SVANY_FOR_BODYLESS_IV(newsv); | |
3540 | ||
3541 | if (srcflags & SVf_ROK) { | |
3542 | newsv->sv_u.svu_rv = SvREFCNT_inc(SvRV(sv)); | |
3543 | /* SV type plus flags */ | |
3544 | dstflags = (SVt_IV|SVf_ROK|SVs_TEMP); | |
3545 | } | |
3546 | else { | |
3547 | /* both src and dst are <= SVt_IV, so sv_any | |
3548 | * points to the head; so access the heads | |
3549 | * directly rather than going via sv_any. | |
3550 | */ | |
3551 | assert( &(sv->sv_u.svu_iv) | |
3552 | == &(((XPVIV*) SvANY(sv))->xiv_iv)); | |
3553 | assert( &(newsv->sv_u.svu_iv) | |
3554 | == &(((XPVIV*) SvANY(newsv))->xiv_iv)); | |
3555 | newsv->sv_u.svu_iv = sv->sv_u.svu_iv; | |
3556 | /* SV type plus flags */ | |
3557 | dstflags = (SVt_IV|SVf_IOK|SVp_IOK|SVs_TEMP | |
3558 | |(srcflags & SVf_IVisUV)); | |
3559 | } | |
3560 | } | |
3561 | else { | |
3562 | assert(!(srcflags & SVf_OK)); | |
3563 | dstflags = (SVt_NULL|SVs_TEMP); /* SV type plus flags */ | |
3564 | } | |
3565 | SvFLAGS(newsv) = dstflags; | |
3566 | ||
3567 | } | |
3568 | else { | |
3569 | /* do the full sv_setsv() */ | |
3570 | SSize_t old_base; | |
3571 | ||
3572 | SvTEMP_on(newsv); | |
3573 | old_base = tmps_basep - PL_tmps_stack; | |
3574 | SvGETMAGIC(sv); | |
3575 | sv_setsv_flags(newsv, sv, SV_DO_COW_SVSETSV); | |
799da9d7 | 3576 | /* the mg_get or sv_setsv might have created new temps |
f7a874b8 DM |
3577 | * or realloced the tmps stack; regrow and reload */ |
3578 | EXTEND_MORTAL(nargs); | |
3579 | tmps_basep = PL_tmps_stack + old_base; | |
3580 | TAINT_NOT; /* Each item is independent */ | |
3581 | } | |
3582 | ||
3583 | } | |
3584 | } while (--nargs); | |
3585 | ||
3586 | /* If there are any temps left above the cut, we need to sort | |
3587 | * them into those to keep and those to free. The only ones to | |
3588 | * keep are those for which we've temporarily unset SvTEMP. | |
3589 | * Work inwards from the two ends at tmps_basep .. PL_tmps_ix, | |
3590 | * swapping pairs as necessary. Stop when we meet in the middle. | |
3591 | */ | |
3592 | { | |
3593 | SV **top = PL_tmps_stack + PL_tmps_ix; | |
3594 | while (tmps_basep <= top) { | |
3595 | SV *sv = *top; | |
3596 | if (SvTEMP(sv)) | |
3597 | top--; | |
3598 | else { | |
3599 | SvTEMP_on(sv); | |
3600 | *top = *tmps_basep; | |
3601 | *tmps_basep = sv; | |
3602 | tmps_basep++; | |
3603 | } | |
3604 | } | |
3605 | } | |
3606 | ||
3607 | tmps_base = tmps_basep - PL_tmps_stack; | |
3608 | } | |
3609 | ||
e02ce34b | 3610 | PL_stack_sp = to_sp; |
f7a874b8 DM |
3611 | |
3612 | /* unrolled FREETMPS() but using tmps_base-1 rather than PL_tmps_floor */ | |
3613 | while (PL_tmps_ix >= tmps_base) { | |
3614 | SV* const sv = PL_tmps_stack[PL_tmps_ix--]; | |
3615 | #ifdef PERL_POISON | |
3616 | PoisonWith(PL_tmps_stack + PL_tmps_ix + 1, 1, SV *, 0xAB); | |
3617 | #endif | |
3618 | if (LIKELY(sv)) { | |
3619 | SvTEMP_off(sv); | |
3620 | SvREFCNT_dec_NN(sv); /* note, can modify tmps_ix!!! */ | |
3621 | } | |
3622 | } | |
3623 | } | |
3624 | ||
3625 | ||
c349b9a0 DM |
3626 | /* also tail-called by pp_return */ |
3627 | ||
f7a874b8 DM |
3628 | PP(pp_leavesub) |
3629 | { | |
1c23e2bd | 3630 | U8 gimme; |
eb578fdb | 3631 | PERL_CONTEXT *cx; |
f7a874b8 | 3632 | SV **oldsp; |
5da525e9 | 3633 | OP *retop; |
a0d0e21e | 3634 | |
4ebe6e95 | 3635 | cx = CX_CUR(); |
61d3b95a DM |
3636 | assert(CxTYPE(cx) == CXt_SUB); |
3637 | ||
3638 | if (CxMULTICALL(cx)) { | |
1f0ba93b DM |
3639 | /* entry zero of a stack is always PL_sv_undef, which |
3640 | * simplifies converting a '()' return into undef in scalar context */ | |
3641 | assert(PL_stack_sp > PL_stack_base || *PL_stack_base == &PL_sv_undef); | |
9850bf21 | 3642 | return 0; |
1f0ba93b | 3643 | } |
9850bf21 | 3644 | |
61d3b95a | 3645 | gimme = cx->blk_gimme; |
f7a874b8 | 3646 | oldsp = PL_stack_base + cx->blk_oldsp; /* last arg of previous frame */ |
1c846c1f | 3647 | |
f7a874b8 DM |
3648 | if (gimme == G_VOID) |
3649 | PL_stack_sp = oldsp; | |
3650 | else | |
e02ce34b | 3651 | leave_adjust_stacks(oldsp, oldsp, gimme, 0); |
1c846c1f | 3652 | |
2f450c1b | 3653 | CX_LEAVE_SCOPE(cx); |
a73d8813 | 3654 | cx_popsub(cx); /* Stack values are safe: release CV and @_ ... */ |
ed8ff0f3 | 3655 | cx_popblock(cx); |
5da525e9 DM |
3656 | retop = cx->blk_sub.retop; |
3657 | CX_POP(cx); | |
a0d0e21e | 3658 | |
5da525e9 | 3659 | return retop; |
a0d0e21e LW |
3660 | } |
3661 | ||
6e45d846 DM |
3662 | |
3663 | /* clear (if possible) or abandon the current @_. If 'abandon' is true, | |
3664 | * forces an abandon */ | |
3665 | ||
3666 | void | |
3667 | Perl_clear_defarray(pTHX_ AV* av, bool abandon) | |
3668 | { | |
3669 | const SSize_t fill = AvFILLp(av); | |
3670 | ||
3671 | PERL_ARGS_ASSERT_CLEAR_DEFARRAY; | |
3672 | ||
656457d0 | 3673 | if (LIKELY(!abandon && SvREFCNT(av) == 1 && !SvMAGICAL(av))) { |
c3d969bf | 3674 | av_clear(av); |
656457d0 DM |
3675 | AvREIFY_only(av); |
3676 | } | |
c3d969bf | 3677 | else { |
656457d0 DM |
3678 | AV *newav = newAV(); |
3679 | av_extend(newav, fill); | |
3680 | AvREIFY_only(newav); | |
3681 | PAD_SVl(0) = MUTABLE_SV(newav); | |
c3d969bf | 3682 | SvREFCNT_dec_NN(av); |
c3d969bf | 3683 | } |
6e45d846 DM |
3684 | } |
3685 | ||
3686 | ||
a0d0e21e LW |
3687 | PP(pp_entersub) |
3688 | { | |
20b7effb | 3689 | dSP; dPOPss; |
a0d0e21e | 3690 | GV *gv; |
eb578fdb KW |
3691 | CV *cv; |
3692 | PERL_CONTEXT *cx; | |
8ae997c5 | 3693 | I32 old_savestack_ix; |
a0d0e21e | 3694 | |
f5719c02 | 3695 | if (UNLIKELY(!sv)) |
1ff56747 DM |
3696 | goto do_die; |
3697 | ||
3698 | /* Locate the CV to call: | |
3699 | * - most common case: RV->CV: f(), $ref->(): | |
3700 | * note that if a sub is compiled before its caller is compiled, | |
3701 | * the stash entry will be a ref to a CV, rather than being a GV. | |
3702 | * - second most common case: CV: $ref->method() | |
3703 | */ | |
3704 | ||
3705 | /* a non-magic-RV -> CV ? */ | |
3706 | if (LIKELY( (SvFLAGS(sv) & (SVf_ROK|SVs_GMG)) == SVf_ROK)) { | |
3707 | cv = MUTABLE_CV(SvRV(sv)); | |
3708 | if (UNLIKELY(SvOBJECT(cv))) /* might be overloaded */ | |
3709 | goto do_ref; | |
3710 | } | |
3711 | else | |
3712 | cv = MUTABLE_CV(sv); | |
3713 | ||
3714 | /* a CV ? */ | |
3715 | if (UNLIKELY(SvTYPE(cv) != SVt_PVCV)) { | |
3716 | /* handle all the weird cases */ | |
313107ce | 3717 | switch (SvTYPE(sv)) { |
1ff56747 DM |
3718 | case SVt_PVLV: |
3719 | if (!isGV_with_GP(sv)) | |
3720 | goto do_default; | |
3721 | /* FALLTHROUGH */ | |
313107ce | 3722 | case SVt_PVGV: |
1ff56747 DM |
3723 | cv = GvCVu((const GV *)sv); |
3724 | if (UNLIKELY(!cv)) { | |
313107ce DM |
3725 | HV *stash; |
3726 | cv = sv_2cv(sv, &stash, &gv, 0); | |
1ff56747 DM |
3727 | if (!cv) { |
3728 | old_savestack_ix = PL_savestack_ix; | |
3729 | goto try_autoload; | |
3730 | } | |
313107ce DM |
3731 | } |
3732 | break; | |
1ff56747 | 3733 | |
313107ce | 3734 | default: |
1ff56747 | 3735 | do_default: |
313107ce DM |
3736 | SvGETMAGIC(sv); |
3737 | if (SvROK(sv)) { | |
1ff56747 DM |
3738 | do_ref: |
3739 | if (UNLIKELY(SvAMAGIC(sv))) { | |
313107ce DM |
3740 | sv = amagic_deref_call(sv, to_cv_amg); |
3741 | /* Don't SPAGAIN here. */ | |
3742 | } | |
3743 | } | |
3744 | else { | |
3745 | const char *sym; | |
3746 | STRLEN len; | |
1ff56747 | 3747 | if (UNLIKELY(!SvOK(sv))) |
313107ce | 3748 | DIE(aTHX_ PL_no_usym, "a subroutine"); |
1ff56747 DM |
3749 | |
3750 | if (UNLIKELY(sv == &PL_sv_yes)) { /* unfound import, ignore */ | |
44dd5d49 | 3751 | if (PL_op->op_flags & OPf_STACKED) /* hasargs */ |
1ff56747 DM |
3752 | SP = PL_stack_base + POPMARK; |
3753 | else | |
3754 | (void)POPMARK; | |
3755 | if (GIMME_V == G_SCALAR) | |
3756 | PUSHs(&PL_sv_undef); | |
3757 | RETURN; | |
3758 | } | |
3759 | ||
313107ce DM |
3760 | sym = SvPV_nomg_const(sv, len); |
3761 | if (PL_op->op_private & HINT_STRICT_REFS) | |
3762 | DIE(aTHX_ "Can't use string (\"%" SVf32 "\"%s) as a subroutine ref while \"strict refs\" in use", sv, len>32 ? "..." : ""); | |
3763 | cv = get_cvn_flags(sym, len, GV_ADD|SvUTF8(sv)); | |
3764 | break; | |
3765 | } | |
3766 | cv = MUTABLE_CV(SvRV(sv)); | |
1ff56747 | 3767 | if (LIKELY(SvTYPE(cv) == SVt_PVCV)) |
313107ce | 3768 | break; |
924ba076 | 3769 | /* FALLTHROUGH */ |
313107ce DM |
3770 | case SVt_PVHV: |
3771 | case SVt_PVAV: | |
1ff56747 | 3772 | do_die: |
313107ce | 3773 | DIE(aTHX_ "Not a CODE reference"); |
313107ce | 3774 | } |
f5719c02 | 3775 | } |
a0d0e21e | 3776 | |
8ae997c5 | 3777 | /* At this point we want to save PL_savestack_ix, either by doing a |
a73d8813 | 3778 | * cx_pushsub(), or for XS, doing an ENTER. But we don't yet know the final |
8ae997c5 | 3779 | * CV we will be using (so we don't know whether its XS, so we can't |
a73d8813 | 3780 | * cx_pushsub() or ENTER yet), and determining cv may itself push stuff on |
8ae997c5 DM |
3781 | * the save stack. So remember where we are currently on the save |
3782 | * stack, and later update the CX or scopestack entry accordingly. */ | |
3783 | old_savestack_ix = PL_savestack_ix; | |
a0d0e21e | 3784 | |
f29834c6 DM |
3785 | /* these two fields are in a union. If they ever become separate, |
3786 | * we have to test for both of them being null below */ | |
9a28816a | 3787 | assert(cv); |
f29834c6 DM |
3788 | assert((void*)&CvROOT(cv) == (void*)&CvXSUB(cv)); |
3789 | while (UNLIKELY(!CvROOT(cv))) { | |
2f349aa0 NC |
3790 | GV* autogv; |
3791 | SV* sub_name; | |
3792 | ||
3793 | /* anonymous or undef'd function leaves us no recourse */ | |
ae77754a FC |
3794 | if (CvLEXICAL(cv) && CvHASGV(cv)) |
3795 | DIE(aTHX_ "Undefined subroutine &%"SVf" called", | |
ecf05a58 | 3796 | SVfARG(cv_name(cv, NULL, 0))); |
ae77754a | 3797 | if (CvANON(cv) || !CvHASGV(cv)) { |
2f349aa0 | 3798 | DIE(aTHX_ "Undefined subroutine called"); |
7d2057d8 | 3799 | } |
2f349aa0 NC |
3800 | |
3801 | /* autoloaded stub? */ | |
ae77754a | 3802 | if (cv != GvCV(gv = CvGV(cv))) { |
2f349aa0 NC |
3803 | cv = GvCV(gv); |
3804 | } | |
3805 | /* should call AUTOLOAD now? */ | |
3806 | else { | |
7b52d656 | 3807 | try_autoload: |
b4b431d9 DM |
3808 | autogv = gv_autoload_pvn(GvSTASH(gv), GvNAME(gv), GvNAMELEN(gv), |
3809 | GvNAMEUTF8(gv) ? SVf_UTF8 : 0); | |
3810 | cv = autogv ? GvCV(autogv) : NULL; | |
2f349aa0 | 3811 | } |
b4b431d9 DM |
3812 | if (!cv) { |
3813 | sub_name = sv_newmortal(); | |
3814 | gv_efullname3(sub_name, gv, NULL); | |
3815 | DIE(aTHX_ "Undefined subroutine &%"SVf" called", SVfARG(sub_name)); | |
3816 | } | |
a0d0e21e LW |
3817 | } |
3818 | ||
4f25d042 DM |
3819 | /* unrolled "CvCLONE(cv) && ! CvCLONED(cv)" */ |
3820 | if (UNLIKELY((CvFLAGS(cv) & (CVf_CLONE|CVf_CLONED)) == CVf_CLONE)) | |
654c6d71 DM |
3821 | DIE(aTHX_ "Closure prototype called"); |
3822 | ||
f5719c02 DM |
3823 | if (UNLIKELY((PL_op->op_private & OPpENTERSUB_DB) && GvCV(PL_DBsub) |
3824 | && !CvNODEBUG(cv))) | |
3825 | { | |
005a8a35 | 3826 | Perl_get_db_sub(aTHX_ &sv, cv); |
a9ef256d NC |
3827 | if (CvISXSUB(cv)) |
3828 | PL_curcopdb = PL_curcop; | |
1ad62f64 BR |
3829 | if (CvLVALUE(cv)) { |
3830 | /* check for lsub that handles lvalue subroutines */ | |
07b605e5 | 3831 | cv = GvCV(gv_fetchpvs("DB::lsub", GV_ADDMULTI, SVt_PVCV)); |
1ad62f64 BR |
3832 | /* if lsub not found then fall back to DB::sub */ |
3833 | if (!cv) cv = GvCV(PL_DBsub); | |
3834 | } else { | |
3835 | cv = GvCV(PL_DBsub); | |
3836 | } | |
a9ef256d | 3837 | |
ccafdc96 RGS |
3838 | if (!cv || (!CvXSUB(cv) && !CvSTART(cv))) |
3839 | DIE(aTHX_ "No DB::sub routine defined"); | |
67caa1fe | 3840 | } |
a0d0e21e | 3841 | |
aed2304a | 3842 | if (!(CvISXSUB(cv))) { |
f1025168 | 3843 | /* This path taken at least 75% of the time */ |
a0d0e21e | 3844 | dMARK; |
c53244ca | 3845 | PADLIST *padlist; |
3689ad62 | 3846 | I32 depth; |
44dd5d49 | 3847 | bool hasargs; |
1c23e2bd | 3848 | U8 gimme; |
f5719c02 | 3849 | |
20448bad DM |
3850 | /* keep PADTMP args alive throughout the call (we need to do this |
3851 | * because @_ isn't refcounted). Note that we create the mortals | |
3852 | * in the caller's tmps frame, so they won't be freed until after | |
3853 | * we return from the sub. | |
3854 | */ | |
91bab027 | 3855 | { |
20448bad DM |
3856 | SV **svp = MARK; |
3857 | while (svp < SP) { | |
3858 | SV *sv = *++svp; | |
3859 | if (!sv) | |
3860 | continue; | |
3861 | if (SvPADTMP(sv)) | |
3862 | *svp = sv = sv_mortalcopy(sv); | |
3863 | SvTEMP_off(sv); | |
3864 | } | |
3865 | } | |
3866 | ||
801bbf61 | 3867 | gimme = GIMME_V; |
ed8ff0f3 | 3868 | cx = cx_pushblock(CXt_SUB, gimme, MARK, old_savestack_ix); |
44dd5d49 | 3869 | hasargs = cBOOL(PL_op->op_flags & OPf_STACKED); |
a73d8813 | 3870 | cx_pushsub(cx, cv, PL_op->op_next, hasargs); |
8ae997c5 | 3871 | |
c53244ca | 3872 | padlist = CvPADLIST(cv); |
d2af2719 | 3873 | if (UNLIKELY((depth = ++CvDEPTH(cv)) >= 2)) |
3689ad62 | 3874 | pad_push(padlist, depth); |
3689ad62 | 3875 | PAD_SET_CUR_NOSAVE(padlist, depth); |
f5719c02 | 3876 | if (LIKELY(hasargs)) { |
10533ace | 3877 | AV *const av = MUTABLE_AV(PAD_SVl(0)); |
bdf02c57 DM |
3878 | SSize_t items; |
3879 | AV **defavp; | |
3880 | ||
bdf02c57 DM |
3881 | defavp = &GvAV(PL_defgv); |
3882 | cx->blk_sub.savearray = *defavp; | |
3883 | *defavp = MUTABLE_AV(SvREFCNT_inc_simple_NN(av)); | |
a0d0e21e | 3884 | |
72f28af4 DM |
3885 | /* it's the responsibility of whoever leaves a sub to ensure |
3886 | * that a clean, empty AV is left in pad[0]. This is normally | |
a73d8813 | 3887 | * done by cx_popsub() */ |
72f28af4 DM |
3888 | assert(!AvREAL(av) && AvFILLp(av) == -1); |
3889 | ||
3890 | items = SP - MARK; | |
f5719c02 | 3891 | if (UNLIKELY(items - 1 > AvMAX(av))) { |
77d27ef6 SF |
3892 | SV **ary = AvALLOC(av); |
3893 | AvMAX(av) = items - 1; | |
3894 | Renew(ary, items, SV*); | |
3895 | AvALLOC(av) = ary; | |
3896 | AvARRAY(av) = ary; | |
3897 | } | |
3898 | ||
bdf02c57 | 3899 | Copy(MARK+1,AvARRAY(av),items,SV*); |
93965878 | 3900 | AvFILLp(av) = items - 1; |
a0d0e21e | 3901 | } |
f5719c02 DM |
3902 | if (UNLIKELY((cx->blk_u16 & OPpENTERSUB_LVAL_MASK) == OPpLVAL_INTRO && |
3903 | !CvLVALUE(cv))) | |
0f948285 DIM |
3904 | DIE(aTHX_ "Can't modify non-lvalue subroutine call of &%"SVf, |
3905 | SVfARG(cv_name(cv, NULL, 0))); | |
4a925ff6 GS |
3906 | /* warning must come *after* we fully set up the context |
3907 | * stuff so that __WARN__ handlers can safely dounwind() | |
3908 | * if they want to | |
3909 | */ | |
3689ad62 | 3910 | if (UNLIKELY(depth == PERL_SUB_DEPTH_WARN |
f5719c02 DM |
3911 | && ckWARN(WARN_RECURSION) |
3912 | && !(PERLDB_SUB && cv == GvCV(PL_DBsub)))) | |
4a925ff6 | 3913 | sub_crush_depth(cv); |
a0d0e21e LW |
3914 | RETURNOP(CvSTART(cv)); |
3915 | } | |
f1025168 | 3916 | else { |
de935cc9 | 3917 | SSize_t markix = TOPMARK; |
71d19c37 | 3918 | bool is_scalar; |
f1025168 | 3919 | |
8ae997c5 DM |
3920 | ENTER; |
3921 | /* pretend we did the ENTER earlier */ | |
3922 | PL_scopestack[PL_scopestack_ix - 1] = old_savestack_ix; | |
3923 | ||
b479c9f2 | 3924 | SAVETMPS; |
3a76ca88 | 3925 | PUTBACK; |
f1025168 | 3926 | |
f5719c02 | 3927 | if (UNLIKELY(((PL_op->op_private |
490576d1 | 3928 | & CX_PUSHSUB_GET_LVALUE_MASK(Perl_is_lvalue_sub) |
4587c532 | 3929 | ) & OPpENTERSUB_LVAL_MASK) == OPpLVAL_INTRO && |
f5719c02 | 3930 | !CvLVALUE(cv))) |
0f948285 DIM |
3931 | DIE(aTHX_ "Can't modify non-lvalue subroutine call of &%"SVf, |
3932 | SVfARG(cv_name(cv, NULL, 0))); | |
4587c532 | 3933 | |
44dd5d49 | 3934 | if (UNLIKELY(!(PL_op->op_flags & OPf_STACKED) && GvAV(PL_defgv))) { |
3a76ca88 RGS |
3935 | /* Need to copy @_ to stack. Alternative may be to |
3936 | * switch stack to @_, and copy return values | |
3937 | * back. This would allow popping @_ in XSUB, e.g.. XXXX */ | |
3938 | AV * const av = GvAV(PL_defgv); | |
ad39f3a2 | 3939 | const SSize_t items = AvFILL(av) + 1; |
3a76ca88 RGS |
3940 | |
3941 | if (items) { | |
dd2a7f90 | 3942 | SSize_t i = 0; |
ad39f3a2 | 3943 | const bool m = cBOOL(SvRMAGICAL(av)); |
3a76ca88 RGS |
3944 | /* Mark is at the end of the stack. */ |
3945 | EXTEND(SP, items); | |
dd2a7f90 | 3946 | for (; i < items; ++i) |
ad39f3a2 FC |
3947 | { |
3948 | SV *sv; | |
3949 | if (m) { | |
3950 | SV ** const svp = av_fetch(av, i, 0); | |
3951 | sv = svp ? *svp : NULL; | |
3952 | } | |
3953 | else sv = AvARRAY(av)[i]; | |
3954 | if (sv) SP[i+1] = sv; | |
dd2a7f90 | 3955 | else { |
199f858d | 3956 | SP[i+1] = newSVavdefelem(av, i, 1); |
dd2a7f90 | 3957 | } |
ad39f3a2 | 3958 | } |
3a76ca88 RGS |
3959 | SP += items; |
3960 | PUTBACK ; | |
3961 | } | |
3962 | } | |
3455055f FC |
3963 | else { |
3964 | SV **mark = PL_stack_base + markix; | |
de935cc9 | 3965 | SSize_t items = SP - mark; |
3455055f FC |
3966 | while (items--) { |
3967 | mark++; | |
60779a30 | 3968 | if (*mark && SvPADTMP(*mark)) { |
3455055f | 3969 | *mark = sv_mortalcopy(*mark); |
60779a30 | 3970 | } |
3455055f FC |
3971 | } |
3972 | } | |
3a76ca88 | 3973 | /* We assume first XSUB in &DB::sub is the called one. */ |
f5719c02 | 3974 | if (UNLIKELY(PL_curcopdb)) { |
3a76ca88 RGS |
3975 | SAVEVPTR(PL_curcop); |
3976 | PL_curcop = PL_curcopdb; | |
3977 | PL_curcopdb = NULL; | |
3978 | } | |
3979 | /* Do we need to open block here? XXXX */ | |
72df79cf | 3980 | |
71d19c37 DM |
3981 | /* calculate gimme here as PL_op might get changed and then not |
3982 | * restored until the LEAVE further down */ | |
3983 | is_scalar = (GIMME_V == G_SCALAR); | |
3984 | ||
72df79cf GF |
3985 | /* CvXSUB(cv) must not be NULL because newXS() refuses NULL xsub address */ |
3986 | assert(CvXSUB(cv)); | |
16c91539 | 3987 | CvXSUB(cv)(aTHX_ cv); |
3a76ca88 RGS |
3988 | |
3989 | /* Enforce some sanity in scalar context. */ | |
71d19c37 | 3990 | if (is_scalar) { |
89a18b40 DM |
3991 | SV **svp = PL_stack_base + markix + 1; |
3992 | if (svp != PL_stack_sp) { | |
3993 | *svp = svp > PL_stack_sp ? &PL_sv_undef : *PL_stack_sp; | |
3994 | PL_stack_sp = svp; | |
3995 | } | |
3a76ca88 | 3996 | } |
a57c6685 | 3997 | LEAVE; |
f1025168 NC |
3998 | return NORMAL; |
3999 | } | |
a0d0e21e LW |
4000 | } |
4001 | ||
44a8e56a | 4002 | void |
864dbfa3 | 4003 | Perl_sub_crush_depth(pTHX_ CV *cv) |
44a8e56a | 4004 | { |
7918f24d NC |
4005 | PERL_ARGS_ASSERT_SUB_CRUSH_DEPTH; |
4006 | ||
44a8e56a | 4007 | if (CvANON(cv)) |
9014280d | 4008 | Perl_warner(aTHX_ packWARN(WARN_RECURSION), "Deep recursion on anonymous subroutine"); |
44a8e56a | 4009 | else { |
35c1215d | 4010 | Perl_warner(aTHX_ packWARN(WARN_RECURSION), "Deep recursion on subroutine \"%"SVf"\"", |
ecf05a58 | 4011 | SVfARG(cv_name(cv,NULL,0))); |
44a8e56a | 4012 | } |
4013 | } | |
4014 | ||
a0d0e21e LW |
4015 | PP(pp_aelem) |
4016 | { | |
20b7effb | 4017 | dSP; |
a0d0e21e | 4018 | SV** svp; |
a3b680e6 | 4019 | SV* const elemsv = POPs; |
d804643f | 4020 | IV elem = SvIV(elemsv); |
502c6561 | 4021 | AV *const av = MUTABLE_AV(POPs); |
e1ec3a88 | 4022 | const U32 lval = PL_op->op_flags & OPf_MOD || LVRET; |
bbfdc870 | 4023 | const U32 defer = PL_op->op_private & OPpLVAL_DEFER; |
4ad10a0b VP |
4024 | const bool localizing = PL_op->op_private & OPpLVAL_INTRO; |
4025 | bool preeminent = TRUE; | |
be6c24e0 | 4026 | SV *sv; |
a0d0e21e | 4027 | |
5d9574c1 | 4028 | if (UNLIKELY(SvROK(elemsv) && !SvGAMAGIC(elemsv) && ckWARN(WARN_MISC))) |
95b63a38 JH |
4029 | Perl_warner(aTHX_ packWARN(WARN_MISC), |
4030 | "Use of reference \"%"SVf"\" as array index", | |
be2597df | 4031 | SVfARG(elemsv)); |
5d9574c1 | 4032 | if (UNLIKELY(SvTYPE(av) != SVt_PVAV)) |
a0d0e21e | 4033 | RETPUSHUNDEF; |
4ad10a0b | 4034 | |
5d9574c1 | 4035 | if (UNLIKELY(localizing)) { |
4ad10a0b VP |
4036 | MAGIC *mg; |
4037 | HV *stash; | |
4038 | ||
4039 | /* If we can determine whether the element exist, | |
4040 | * Try to preserve the existenceness of a tied array | |
4041 | * element by using EXISTS and DELETE if possible. | |
4042 | * Fallback to FETCH and STORE otherwise. */ | |
4043 | if (SvCANEXISTDELETE(av)) | |
4044 | preeminent = av_exists(av, elem); | |
4045 | } | |
4046 | ||
68dc0745 | 4047 | svp = av_fetch(av, elem, lval && !defer); |
a0d0e21e | 4048 | if (lval) { |
2b573ace | 4049 | #ifdef PERL_MALLOC_WRAP |
2b573ace | 4050 | if (SvUOK(elemsv)) { |
a9c4fd4e | 4051 | const UV uv = SvUV(elemsv); |
2b573ace JH |
4052 | elem = uv > IV_MAX ? IV_MAX : uv; |
4053 | } | |
4054 | else if (SvNOK(elemsv)) | |
4055 | elem = (IV)SvNV(elemsv); | |
a3b680e6 AL |
4056 | if (elem > 0) { |
4057 | static const char oom_array_extend[] = | |
4058 | "Out of memory during array extend"; /* Duplicated in av.c */ | |
2b573ace | 4059 | MEM_WRAP_CHECK_1(elem,SV*,oom_array_extend); |
a3b680e6 | 4060 | } |
2b573ace | 4061 | #endif |
ce0d59fd | 4062 | if (!svp || !*svp) { |
bbfdc870 | 4063 | IV len; |
68dc0745 | 4064 | if (!defer) |
cea2e8a9 | 4065 | DIE(aTHX_ PL_no_aelem, elem); |
b9f2b683 | 4066 | len = av_tindex(av); |
199f858d | 4067 | mPUSHs(newSVavdefelem(av, |
bbfdc870 FC |
4068 | /* Resolve a negative index now, unless it points before the |
4069 | beginning of the array, in which case record it for error | |
4070 | reporting in magic_setdefelem. */ | |
199f858d FC |
4071 | elem < 0 && len + elem >= 0 ? len + elem : elem, |
4072 | 1)); | |
68dc0745 | 4073 | RETURN; |
4074 | } | |
5d9574c1 | 4075 | if (UNLIKELY(localizing)) { |
4ad10a0b VP |
4076 | if (preeminent) |
4077 | save_aelem(av, elem, svp); | |
4078 | else | |
4079 | SAVEADELETE(av, elem); | |
4080 | } | |
9026059d GG |
4081 | else if (PL_op->op_private & OPpDEREF) { |
4082 | PUSHs(vivify_ref(*svp, PL_op->op_private & OPpDEREF)); | |
4083 | RETURN; | |
4084 | } | |
a0d0e21e | 4085 | } |
3280af22 | 4086 | sv = (svp ? *svp : &PL_sv_undef); |
39cf747a | 4087 | if (!lval && SvRMAGICAL(av) && SvGMAGICAL(sv)) /* see note in pp_helem() */ |
fd69380d | 4088 | mg_get(sv); |
be6c24e0 | 4089 | PUSHs(sv); |
a0d0e21e LW |
4090 | RETURN; |
4091 | } | |
4092 | ||
9026059d | 4093 | SV* |
864dbfa3 | 4094 | Perl_vivify_ref(pTHX_ SV *sv, U32 to_what) |
02a9e968 | 4095 | { |
7918f24d NC |
4096 | PERL_ARGS_ASSERT_VIVIFY_REF; |
4097 | ||
5b295bef | 4098 | SvGETMAGIC(sv); |
02a9e968 CS |
4099 | if (!SvOK(sv)) { |
4100 | if (SvREADONLY(sv)) | |
cb077ed2 | 4101 | Perl_croak_no_modify(); |
43230e26 | 4102 | prepare_SV_for_RV(sv); |
68dc0745 | 4103 | switch (to_what) { |
5f05dabc | 4104 | case OPpDEREF_SV: |
561b68a9 | 4105 | SvRV_set(sv, newSV(0)); |
5f05dabc | 4106 | break; |
4107 | case OPpDEREF_AV: | |
ad64d0ec | 4108 | SvRV_set(sv, MUTABLE_SV(newAV())); |
5f05dabc | 4109 | break; |
4110 | case OPpDEREF_HV: | |
ad64d0ec | 4111 | SvRV_set(sv, MUTABLE_SV(newHV())); |
5f05dabc | 4112 | break; |
4113 | } | |
02a9e968 CS |
4114 | SvROK_on(sv); |
4115 | SvSETMAGIC(sv); | |
7e482323 | 4116 | SvGETMAGIC(sv); |
02a9e968 | 4117 | } |
9026059d GG |
4118 | if (SvGMAGICAL(sv)) { |
4119 | /* copy the sv without magic to prevent magic from being | |
4120 | executed twice */ | |
4121 | SV* msv = sv_newmortal(); | |
4122 | sv_setsv_nomg(msv, sv); | |
4123 | return msv; | |
4124 | } | |
4125 | return sv; | |
02a9e968 CS |
4126 | } |
4127 | ||
7d6c333c | 4128 | PERL_STATIC_INLINE HV * |
4129 | S_opmethod_stash(pTHX_ SV* meth) | |
f5d5a27c | 4130 | { |
a0d0e21e | 4131 | SV* ob; |
56304f61 | 4132 | HV* stash; |
b55b14d0 | 4133 | |
d648ffcb | 4134 | SV* const sv = PL_stack_base + TOPMARK == PL_stack_sp |
f226e9be FC |
4135 | ? (Perl_croak(aTHX_ "Can't call method \"%"SVf"\" without a " |
4136 | "package or object reference", SVfARG(meth)), | |
4137 | (SV *)NULL) | |
4138 | : *(PL_stack_base + TOPMARK + 1); | |
f5d5a27c | 4139 | |
7d6c333c | 4140 | PERL_ARGS_ASSERT_OPMETHOD_STASH; |
d648ffcb | 4141 | |
5d9574c1 | 4142 | if (UNLIKELY(!sv)) |
7156e69a | 4143 | undefined: |
a214957f VP |
4144 | Perl_croak(aTHX_ "Can't call method \"%"SVf"\" on an undefined value", |
4145 | SVfARG(meth)); | |
4f1b7578 | 4146 | |
d648ffcb | 4147 | if (UNLIKELY(SvGMAGICAL(sv))) mg_get(sv); |
4148 | else if (SvIsCOW_shared_hash(sv)) { /* MyClass->meth() */ | |
4149 | stash = gv_stashsv(sv, GV_CACHE_ONLY); | |
7d6c333c | 4150 | if (stash) return stash; |
d648ffcb | 4151 | } |
4152 | ||
a0d0e21e | 4153 | if (SvROK(sv)) |
ad64d0ec | 4154 | ob = MUTABLE_SV(SvRV(sv)); |
7156e69a | 4155 | else if (!SvOK(sv)) goto undefined; |
a77c16f7 FC |
4156 | else if (isGV_with_GP(sv)) { |
4157 | if (!GvIO(sv)) | |
4158 | Perl_croak(aTHX_ "Can't call method \"%"SVf"\" " | |
4159 | "without a package or object reference", | |
4160 | SVfARG(meth)); | |
4161 | ob = sv; | |
4162 | if (SvTYPE(ob) == SVt_PVLV && LvTYPE(ob) == 'y') { | |
4163 | assert(!LvTARGLEN(ob)); | |
4164 | ob = LvTARG(ob); | |
4165 | assert(ob); | |
4166 | } | |
4167 | *(PL_stack_base + TOPMARK + 1) = sv_2mortal(newRV(ob)); | |
4168 | } | |
a0d0e21e | 4169 | else { |
89269094 | 4170 | /* this isn't a reference */ |
a0d0e21e | 4171 | GV* iogv; |
f937af42 | 4172 | STRLEN packlen; |
89269094 | 4173 | const char * const packname = SvPV_nomg_const(sv, packlen); |
d283e876 | 4174 | const U32 packname_utf8 = SvUTF8(sv); |
4175 | stash = gv_stashpvn(packname, packlen, packname_utf8 | GV_CACHE_ONLY); | |
7d6c333c | 4176 | if (stash) return stash; |
081fc587 | 4177 | |
89269094 | 4178 | if (!(iogv = gv_fetchpvn_flags( |
d283e876 | 4179 | packname, packlen, packname_utf8, SVt_PVIO |
da6b625f | 4180 | )) || |
ad64d0ec | 4181 | !(ob=MUTABLE_SV(GvIO(iogv)))) |
a0d0e21e | 4182 | { |
af09ea45 | 4183 | /* this isn't the name of a filehandle either */ |
89269094 | 4184 | if (!packlen) |
834a4ddd | 4185 | { |
7156e69a FC |
4186 | Perl_croak(aTHX_ "Can't call method \"%"SVf"\" " |
4187 | "without a package or object reference", | |
4188 | SVfARG(meth)); | |
834a4ddd | 4189 | } |
af09ea45 | 4190 | /* assume it's a package name */ |
d283e876 | 4191 | stash = gv_stashpvn(packname, packlen, packname_utf8); |
7d6c333c | 4192 | if (stash) return stash; |
4193 | else return MUTABLE_HV(sv); | |
a0d0e21e | 4194 | } |
af09ea45 | 4195 | /* it _is_ a filehandle name -- replace with a reference */ |
ad64d0ec | 4196 | *(PL_stack_base + TOPMARK + 1) = sv_2mortal(newRV(MUTABLE_SV(iogv))); |
a0d0e21e LW |
4197 | } |
4198 | ||
1f3ffe4c | 4199 | /* if we got here, ob should be an object or a glob */ |
f0d43078 | 4200 | if (!ob || !(SvOBJECT(ob) |
a77c16f7 | 4201 | || (isGV_with_GP(ob) |
159b6efe | 4202 | && (ob = MUTABLE_SV(GvIO((const GV *)ob))) |
f0d43078 GS |
4203 | && SvOBJECT(ob)))) |
4204 | { | |
b375e37b BF |
4205 | Perl_croak(aTHX_ "Can't call method \"%"SVf"\" on unblessed reference", |
4206 | SVfARG((SvSCREAM(meth) && strEQ(SvPV_nolen_const(meth),"isa")) | |
4207 | ? newSVpvs_flags("DOES", SVs_TEMP) | |
4208 | : meth)); | |
f0d43078 | 4209 | } |
a0d0e21e | 4210 | |
7d6c333c | 4211 | return SvSTASH(ob); |
4212 | } | |
4213 | ||
4214 | PP(pp_method) | |
4215 | { | |
4216 | dSP; | |
4217 | GV* gv; | |
4218 | HV* stash; | |
4219 | SV* const meth = TOPs; | |
4220 | ||
4221 | if (SvROK(meth)) { | |
4222 | SV* const rmeth = SvRV(meth); | |
4223 | if (SvTYPE(rmeth) == SVt_PVCV) { | |
4224 | SETs(rmeth); | |
4225 | RETURN; | |
4226 | } | |
4227 | } | |
a0d0e21e | 4228 | |
7d6c333c | 4229 | stash = opmethod_stash(meth); |
af09ea45 | 4230 | |
7d6c333c | 4231 | gv = gv_fetchmethod_sv_flags(stash, meth, GV_AUTOLOAD|GV_CROAK); |
4232 | assert(gv); | |
4233 | ||
4234 | SETs(isGV(gv) ? MUTABLE_SV(GvCV(gv)) : MUTABLE_SV(gv)); | |
4235 | RETURN; | |
4236 | } | |
4237 | ||
810bd8b7 | 4238 | #define METHOD_CHECK_CACHE(stash,cache,meth) \ |
4239 | const HE* const he = hv_fetch_ent(cache, meth, 0, 0); \ | |
4240 | if (he) { \ | |
4241 | gv = MUTABLE_GV(HeVAL(he)); \ | |
4242 | if (isGV(gv) && GvCV(gv) && (!GvCVGEN(gv) || GvCVGEN(gv) \ | |
4243 | == (PL_sub_generation + HvMROMETA(stash)->cache_gen))) \ | |
4244 | { \ | |
4245 | XPUSHs(MUTABLE_SV(GvCV(gv))); \ | |
4246 | RETURN; \ | |
4247 | } \ | |
4248 | } \ | |
4249 | ||
7d6c333c | 4250 | PP(pp_method_named) |
4251 | { | |
4252 | dSP; | |
4253 | GV* gv; | |
4254 | SV* const meth = cMETHOPx_meth(PL_op); | |
4255 | HV* const stash = opmethod_stash(meth); | |
4256 | ||
4257 | if (LIKELY(SvTYPE(stash) == SVt_PVHV)) { | |
810bd8b7 | 4258 | METHOD_CHECK_CACHE(stash, stash, meth); |
f5d5a27c CS |
4259 | } |
4260 | ||
7d6c333c | 4261 | gv = gv_fetchmethod_sv_flags(stash, meth, GV_AUTOLOAD|GV_CROAK); |
256d1bb2 | 4262 | assert(gv); |
9b9d0b15 | 4263 | |
7d6c333c | 4264 | XPUSHs(isGV(gv) ? MUTABLE_SV(GvCV(gv)) : MUTABLE_SV(gv)); |
4265 | RETURN; | |
4266 | } | |
4267 | ||
4268 | PP(pp_method_super) | |
4269 | { | |
4270 | dSP; | |
4271 | GV* gv; | |
4272 | HV* cache; | |
4273 | SV* const meth = cMETHOPx_meth(PL_op); | |
4274 | HV* const stash = CopSTASH(PL_curcop); | |
4275 | /* Actually, SUPER doesn't need real object's (or class') stash at all, | |
4276 | * as it uses CopSTASH. However, we must ensure that object(class) is | |
4277 | * correct (this check is done by S_opmethod_stash) */ | |
4278 | opmethod_stash(meth); | |
4279 | ||
4280 | if ((cache = HvMROMETA(stash)->super)) { | |
810bd8b7 | 4281 | METHOD_CHECK_CACHE(stash, cache, meth); |
4282 | } | |
4283 | ||
4284 | gv = gv_fetchmethod_sv_flags(stash, meth, GV_AUTOLOAD|GV_CROAK|GV_SUPER); | |
4285 | assert(gv); | |
4286 | ||
4287 | XPUSHs(isGV(gv) ? MUTABLE_SV(GvCV(gv)) : MUTABLE_SV(gv)); | |
4288 | RETURN; | |
4289 | } | |
4290 | ||
4291 | PP(pp_method_redir) | |
4292 | { | |
4293 | dSP; | |
4294 | GV* gv; | |
4295 | SV* const meth = cMETHOPx_meth(PL_op); | |
4296 | HV* stash = gv_stashsv(cMETHOPx_rclass(PL_op), 0); | |
4297 | opmethod_stash(meth); /* not used but needed for error checks */ | |
4298 | ||
4299 | if (stash) { METHOD_CHECK_CACHE(stash, stash, meth); } | |
4300 | else stash = MUTABLE_HV(cMETHOPx_rclass(PL_op)); | |
4301 | ||
4302 | gv = gv_fetchmethod_sv_flags(stash, meth, GV_AUTOLOAD|GV_CROAK); | |
4303 | assert(gv); | |
4304 | ||
4305 | XPUSHs(isGV(gv) ? MUTABLE_SV(GvCV(gv)) : MUTABLE_SV(gv)); | |
4306 | RETURN; | |
4307 | } | |
4308 | ||
4309 | PP(pp_method_redir_super) | |
4310 | { | |
4311 | dSP; | |
4312 | GV* gv; | |
4313 | HV* cache; | |
4314 | SV* const meth = cMETHOPx_meth(PL_op); | |
4315 | HV* stash = gv_stashsv(cMETHOPx_rclass(PL_op), 0); | |
4316 | opmethod_stash(meth); /* not used but needed for error checks */ | |
4317 | ||
4318 | if (UNLIKELY(!stash)) stash = MUTABLE_HV(cMETHOPx_rclass(PL_op)); | |
4319 | else if ((cache = HvMROMETA(stash)->super)) { | |
4320 | METHOD_CHECK_CACHE(stash, cache, meth); | |
7d6c333c | 4321 | } |
4322 | ||
4323 | gv = gv_fetchmethod_sv_flags(stash, meth, GV_AUTOLOAD|GV_CROAK|GV_SUPER); | |
4324 | assert(gv); | |
4325 | ||
4326 | XPUSHs(isGV(gv) ? MUTABLE_SV(GvCV(gv)) : MUTABLE_SV(gv)); | |
4327 | RETURN; | |
a0d0e21e | 4328 | } |
241d1a3b NC |
4329 | |
4330 | /* | |
14d04a33 | 4331 | * ex: set ts=8 sts=4 sw=4 et: |
37442d52 | 4332 | */ |