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 | |
354eabfa | 133 | if (PL_op->op_private & OPpASSIGN_BACKWARDS) { /* {or,and,dor}assign */ |
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)) { | |
51f69a24 AC |
287 | if ((left == right /* $l .= $l */ |
288 | || (PL_op->op_private & OPpTARGET_MY)) /* $l = $l . $r */ | |
289 | && ckWARN(WARN_UNINITIALIZED) | |
290 | ) | |
291 | report_uninit(left); | |
adf14ec6 | 292 | SvPVCLEAR(left); |
c75ab21a | 293 | } |
18ea7bf2 S |
294 | else { |
295 | SvPV_force_nomg_nolen(left); | |
296 | } | |
583a5589 | 297 | lbyte = !DO_UTF8(left); |
90f5826e | 298 | if (IN_BYTES) |
18ea7bf2 | 299 | SvUTF8_off(left); |
8d6d96c1 | 300 | } |
a12c0f56 | 301 | |
c75ab21a | 302 | if (!rcopied) { |
6f1401dc | 303 | rpv = SvPV_nomg_const(right, rlen); |
c75ab21a RH |
304 | rbyte = !DO_UTF8(right); |
305 | } | |
8d6d96c1 HS |
306 | if (lbyte != rbyte) { |
307 | if (lbyte) | |
308 | sv_utf8_upgrade_nomg(TARG); | |
309 | else { | |
db79b45b | 310 | if (!rcopied) |
59cd0e26 | 311 | right = newSVpvn_flags(rpv, rlen, SVs_TEMP); |
8d6d96c1 | 312 | sv_utf8_upgrade_nomg(right); |
6f1401dc | 313 | rpv = SvPV_nomg_const(right, rlen); |
69b47968 | 314 | } |
a0d0e21e | 315 | } |
8d6d96c1 | 316 | sv_catpvn_nomg(TARG, rpv, rlen); |
43ebc500 | 317 | |
a0d0e21e LW |
318 | SETTARG; |
319 | RETURN; | |
748a9306 | 320 | } |
a0d0e21e LW |
321 | } |
322 | ||
d5524600 DM |
323 | /* push the elements of av onto the stack. |
324 | * XXX Note that padav has similar code but without the mg_get(). | |
325 | * I suspect that the mg_get is no longer needed, but while padav | |
326 | * differs, it can't share this function */ | |
327 | ||
f9ae8fb6 | 328 | STATIC void |
d5524600 DM |
329 | S_pushav(pTHX_ AV* const av) |
330 | { | |
331 | dSP; | |
c70927a6 | 332 | const SSize_t maxarg = AvFILL(av) + 1; |
d5524600 | 333 | EXTEND(SP, maxarg); |
5d9574c1 | 334 | if (UNLIKELY(SvRMAGICAL(av))) { |
c70927a6 FC |
335 | PADOFFSET i; |
336 | for (i=0; i < (PADOFFSET)maxarg; i++) { | |
d5524600 DM |
337 | SV ** const svp = av_fetch(av, i, FALSE); |
338 | /* See note in pp_helem, and bug id #27839 */ | |
339 | SP[i+1] = svp | |
340 | ? SvGMAGICAL(*svp) ? (mg_get(*svp), *svp) : *svp | |
341 | : &PL_sv_undef; | |
342 | } | |
343 | } | |
344 | else { | |
c70927a6 FC |
345 | PADOFFSET i; |
346 | for (i=0; i < (PADOFFSET)maxarg; i++) { | |
ce0d59fd | 347 | SV * const sv = AvARRAY(av)[i]; |
5d9574c1 | 348 | SP[i+1] = LIKELY(sv) ? sv : &PL_sv_undef; |
ce0d59fd | 349 | } |
d5524600 DM |
350 | } |
351 | SP += maxarg; | |
352 | PUTBACK; | |
353 | } | |
354 | ||
355 | ||
a7fd8ef6 DM |
356 | /* ($lex1,@lex2,...) or my ($lex1,@lex2,...) */ |
357 | ||
358 | PP(pp_padrange) | |
359 | { | |
20b7effb | 360 | dSP; |
a7fd8ef6 DM |
361 | PADOFFSET base = PL_op->op_targ; |
362 | int count = (int)(PL_op->op_private) & OPpPADRANGE_COUNTMASK; | |
363 | int i; | |
d5524600 DM |
364 | if (PL_op->op_flags & OPf_SPECIAL) { |
365 | /* fake the RHS of my ($x,$y,..) = @_ */ | |
366 | PUSHMARK(SP); | |
367 | S_pushav(aTHX_ GvAVn(PL_defgv)); | |
368 | SPAGAIN; | |
369 | } | |
370 | ||
a7fd8ef6 DM |
371 | /* note, this is only skipped for compile-time-known void cxt */ |
372 | if ((PL_op->op_flags & OPf_WANT) != OPf_WANT_VOID) { | |
373 | EXTEND(SP, count); | |
374 | PUSHMARK(SP); | |
375 | for (i = 0; i <count; i++) | |
376 | *++SP = PAD_SV(base+i); | |
377 | } | |
378 | if (PL_op->op_private & OPpLVAL_INTRO) { | |
4e09461c DM |
379 | SV **svp = &(PAD_SVl(base)); |
380 | const UV payload = (UV)( | |
381 | (base << (OPpPADRANGE_COUNTSHIFT + SAVE_TIGHT_SHIFT)) | |
382 | | (count << SAVE_TIGHT_SHIFT) | |
383 | | SAVEt_CLEARPADRANGE); | |
6d59e610 | 384 | STATIC_ASSERT_STMT(OPpPADRANGE_COUNTMASK + 1 == (1 << OPpPADRANGE_COUNTSHIFT)); |
d081a355 DM |
385 | assert((payload >> (OPpPADRANGE_COUNTSHIFT+SAVE_TIGHT_SHIFT)) |
386 | == (Size_t)base); | |
a3444cc5 DM |
387 | { |
388 | dSS_ADD; | |
389 | SS_ADD_UV(payload); | |
390 | SS_ADD_END(1); | |
391 | } | |
4e09461c | 392 | |
a7fd8ef6 | 393 | for (i = 0; i <count; i++) |
4e09461c | 394 | SvPADSTALE_off(*svp++); /* mark lexical as active */ |
a7fd8ef6 DM |
395 | } |
396 | RETURN; | |
397 | } | |
398 | ||
399 | ||
a0d0e21e LW |
400 | PP(pp_padsv) |
401 | { | |
20b7effb | 402 | dSP; |
6c28b496 DD |
403 | EXTEND(SP, 1); |
404 | { | |
405 | OP * const op = PL_op; | |
406 | /* access PL_curpad once */ | |
407 | SV ** const padentry = &(PAD_SVl(op->op_targ)); | |
408 | { | |
409 | dTARG; | |
410 | TARG = *padentry; | |
411 | PUSHs(TARG); | |
412 | PUTBACK; /* no pop/push after this, TOPs ok */ | |
8ec5e241 | 413 | } |
6c28b496 DD |
414 | if (op->op_flags & OPf_MOD) { |
415 | if (op->op_private & OPpLVAL_INTRO) | |
416 | if (!(op->op_private & OPpPAD_STATE)) | |
417 | save_clearsv(padentry); | |
418 | if (op->op_private & OPpDEREF) { | |
8f90a16d FC |
419 | /* TOPs is equivalent to TARG here. Using TOPs (SP) rather |
420 | than TARG reduces the scope of TARG, so it does not | |
421 | span the call to save_clearsv, resulting in smaller | |
422 | machine code. */ | |
6c28b496 DD |
423 | TOPs = vivify_ref(TOPs, op->op_private & OPpDEREF); |
424 | } | |
425 | } | |
426 | return op->op_next; | |
4633a7c4 | 427 | } |
a0d0e21e LW |
428 | } |
429 | ||
430 | PP(pp_readline) | |
431 | { | |
30901a8a FC |
432 | dSP; |
433 | if (TOPs) { | |
434 | SvGETMAGIC(TOPs); | |
fc99edcf | 435 | tryAMAGICunTARGETlist(iter_amg, 0); |
30901a8a FC |
436 | PL_last_in_gv = MUTABLE_GV(*PL_stack_sp--); |
437 | } | |
438 | else PL_last_in_gv = PL_argvgv, PL_stack_sp--; | |
6e592b3a BM |
439 | if (!isGV_with_GP(PL_last_in_gv)) { |
440 | if (SvROK(PL_last_in_gv) && isGV_with_GP(SvRV(PL_last_in_gv))) | |
159b6efe | 441 | PL_last_in_gv = MUTABLE_GV(SvRV(PL_last_in_gv)); |
8efb3254 | 442 | else { |
f5284f61 | 443 | dSP; |
ad64d0ec | 444 | XPUSHs(MUTABLE_SV(PL_last_in_gv)); |
f5284f61 | 445 | PUTBACK; |
897d3989 | 446 | Perl_pp_rv2gv(aTHX); |
159b6efe | 447 | PL_last_in_gv = MUTABLE_GV(*PL_stack_sp--); |
84ee769f FC |
448 | if (PL_last_in_gv == (GV *)&PL_sv_undef) |
449 | PL_last_in_gv = NULL; | |
450 | else | |
451 | assert(isGV_with_GP(PL_last_in_gv)); | |
f5284f61 IZ |
452 | } |
453 | } | |
a0d0e21e LW |
454 | return do_readline(); |
455 | } | |
456 | ||
457 | PP(pp_eq) | |
458 | { | |
20b7effb | 459 | dSP; |
33efebe6 DM |
460 | SV *left, *right; |
461 | ||
a42d0242 | 462 | tryAMAGICbin_MG(eq_amg, AMGf_set|AMGf_numeric); |
33efebe6 DM |
463 | right = POPs; |
464 | left = TOPs; | |
465 | SETs(boolSV( | |
466 | (SvIOK_notUV(left) && SvIOK_notUV(right)) | |
467 | ? (SvIVX(left) == SvIVX(right)) | |
468 | : ( do_ncmp(left, right) == 0) | |
469 | )); | |
470 | RETURN; | |
a0d0e21e LW |
471 | } |
472 | ||
b1c05ba5 | 473 | |
4c2c3128 | 474 | /* also used for: pp_i_preinc() */ |
b1c05ba5 | 475 | |
a0d0e21e LW |
476 | PP(pp_preinc) |
477 | { | |
4c2c3128 DM |
478 | SV *sv = *PL_stack_sp; |
479 | ||
480 | if (LIKELY(((sv->sv_flags & | |
481 | (SVf_THINKFIRST|SVs_GMG|SVf_IVisUV| | |
482 | SVf_IOK|SVf_NOK|SVf_POK|SVp_NOK|SVp_POK|SVf_ROK)) | |
483 | == SVf_IOK)) | |
484 | && SvIVX(sv) != IV_MAX) | |
485 | { | |
486 | SvIV_set(sv, SvIVX(sv) + 1); | |
487 | } | |
488 | else /* Do all the PERL_PRESERVE_IVUV and hard cases in sv_inc */ | |
489 | sv_inc(sv); | |
490 | SvSETMAGIC(sv); | |
491 | return NORMAL; | |
492 | } | |
493 | ||
494 | ||
495 | /* also used for: pp_i_predec() */ | |
496 | ||
497 | PP(pp_predec) | |
498 | { | |
499 | SV *sv = *PL_stack_sp; | |
500 | ||
501 | if (LIKELY(((sv->sv_flags & | |
502 | (SVf_THINKFIRST|SVs_GMG|SVf_IVisUV| | |
503 | SVf_IOK|SVf_NOK|SVf_POK|SVp_NOK|SVp_POK|SVf_ROK)) | |
504 | == SVf_IOK)) | |
505 | && SvIVX(sv) != IV_MIN) | |
55497cff | 506 | { |
4c2c3128 | 507 | SvIV_set(sv, SvIVX(sv) - 1); |
748a9306 | 508 | } |
4c2c3128 DM |
509 | else /* Do all the PERL_PRESERVE_IVUV and hard cases in sv_dec */ |
510 | sv_dec(sv); | |
511 | SvSETMAGIC(sv); | |
a0d0e21e LW |
512 | return NORMAL; |
513 | } | |
514 | ||
b1c05ba5 DM |
515 | |
516 | /* also used for: pp_orassign() */ | |
517 | ||
a0d0e21e LW |
518 | PP(pp_or) |
519 | { | |
20b7effb | 520 | dSP; |
f410a211 | 521 | PERL_ASYNC_CHECK(); |
a0d0e21e LW |
522 | if (SvTRUE(TOPs)) |
523 | RETURN; | |
524 | else { | |
c960fc3b SP |
525 | if (PL_op->op_type == OP_OR) |
526 | --SP; | |
a0d0e21e LW |
527 | RETURNOP(cLOGOP->op_other); |
528 | } | |
529 | } | |
530 | ||
b1c05ba5 DM |
531 | |
532 | /* also used for: pp_dor() pp_dorassign() */ | |
533 | ||
25a55bd7 | 534 | PP(pp_defined) |
c963b151 | 535 | { |
20b7effb | 536 | dSP; |
eb578fdb | 537 | SV* sv; |
6136c704 | 538 | bool defined; |
25a55bd7 | 539 | const int op_type = PL_op->op_type; |
ea5195b7 | 540 | const bool is_dor = (op_type == OP_DOR || op_type == OP_DORASSIGN); |
c963b151 | 541 | |
6136c704 | 542 | if (is_dor) { |
f410a211 | 543 | PERL_ASYNC_CHECK(); |
25a55bd7 | 544 | sv = TOPs; |
5d9574c1 | 545 | if (UNLIKELY(!sv || !SvANY(sv))) { |
2bd49cfc NC |
546 | if (op_type == OP_DOR) |
547 | --SP; | |
25a55bd7 SP |
548 | RETURNOP(cLOGOP->op_other); |
549 | } | |
b7c44293 RGS |
550 | } |
551 | else { | |
552 | /* OP_DEFINED */ | |
25a55bd7 | 553 | sv = POPs; |
5d9574c1 | 554 | if (UNLIKELY(!sv || !SvANY(sv))) |
25a55bd7 | 555 | RETPUSHNO; |
b7c44293 | 556 | } |
25a55bd7 | 557 | |
6136c704 | 558 | defined = FALSE; |
c963b151 BD |
559 | switch (SvTYPE(sv)) { |
560 | case SVt_PVAV: | |
561 | if (AvMAX(sv) >= 0 || SvGMAGICAL(sv) || (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied))) | |
25a55bd7 | 562 | defined = TRUE; |
c963b151 BD |
563 | break; |
564 | case SVt_PVHV: | |
565 | if (HvARRAY(sv) || SvGMAGICAL(sv) || (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied))) | |
25a55bd7 | 566 | defined = TRUE; |
c963b151 BD |
567 | break; |
568 | case SVt_PVCV: | |
569 | if (CvROOT(sv) || CvXSUB(sv)) | |
25a55bd7 | 570 | defined = TRUE; |
c963b151 BD |
571 | break; |
572 | default: | |
5b295bef | 573 | SvGETMAGIC(sv); |
c963b151 | 574 | if (SvOK(sv)) |
25a55bd7 | 575 | defined = TRUE; |
6136c704 | 576 | break; |
c963b151 | 577 | } |
6136c704 AL |
578 | |
579 | if (is_dor) { | |
c960fc3b SP |
580 | if(defined) |
581 | RETURN; | |
582 | if(op_type == OP_DOR) | |
583 | --SP; | |
25a55bd7 | 584 | RETURNOP(cLOGOP->op_other); |
25a55bd7 | 585 | } |
d9aa96a4 SP |
586 | /* assuming OP_DEFINED */ |
587 | if(defined) | |
588 | RETPUSHYES; | |
589 | RETPUSHNO; | |
c963b151 BD |
590 | } |
591 | ||
230ee21f DM |
592 | |
593 | ||
a0d0e21e LW |
594 | PP(pp_add) |
595 | { | |
20b7effb | 596 | dSP; dATARGET; bool useleft; SV *svl, *svr; |
230ee21f | 597 | |
6f1401dc DM |
598 | tryAMAGICbin_MG(add_amg, AMGf_assign|AMGf_numeric); |
599 | svr = TOPs; | |
600 | svl = TOPm1s; | |
601 | ||
28e5dec8 | 602 | #ifdef PERL_PRESERVE_IVUV |
230ee21f DM |
603 | |
604 | /* special-case some simple common cases */ | |
605 | if (!((svl->sv_flags|svr->sv_flags) & (SVf_IVisUV|SVs_GMG))) { | |
606 | IV il, ir; | |
607 | U32 flags = (svl->sv_flags & svr->sv_flags); | |
608 | if (flags & SVf_IOK) { | |
609 | /* both args are simple IVs */ | |
610 | UV topl, topr; | |
611 | il = SvIVX(svl); | |
612 | ir = SvIVX(svr); | |
613 | do_iv: | |
614 | topl = ((UV)il) >> (UVSIZE * 8 - 2); | |
615 | topr = ((UV)ir) >> (UVSIZE * 8 - 2); | |
616 | ||
617 | /* if both are in a range that can't under/overflow, do a | |
618 | * simple integer add: if the top of both numbers | |
619 | * are 00 or 11, then it's safe */ | |
620 | if (!( ((topl+1) | (topr+1)) & 2)) { | |
621 | SP--; | |
622 | TARGi(il + ir, 0); /* args not GMG, so can't be tainted */ | |
623 | SETs(TARG); | |
624 | RETURN; | |
625 | } | |
626 | goto generic; | |
627 | } | |
628 | else if (flags & SVf_NOK) { | |
629 | /* both args are NVs */ | |
630 | NV nl = SvNVX(svl); | |
631 | NV nr = SvNVX(svr); | |
632 | ||
3336af0b DD |
633 | if ( |
634 | #if defined(NAN_COMPARE_BROKEN) && defined(Perl_isnan) | |
635 | !Perl_isnan(nl) && nl == (NV)(il = (IV)nl) | |
636 | && !Perl_isnan(nr) && nr == (NV)(ir = (IV)nr) | |
637 | #else | |
638 | nl == (NV)(il = (IV)nl) && nr == (NV)(ir = (IV)nr) | |
639 | #endif | |
640 | ) | |
230ee21f DM |
641 | /* nothing was lost by converting to IVs */ |
642 | goto do_iv; | |
643 | SP--; | |
644 | TARGn(nl + nr, 0); /* args not GMG, so can't be tainted */ | |
645 | SETs(TARG); | |
646 | RETURN; | |
647 | } | |
648 | } | |
649 | ||
650 | generic: | |
651 | ||
652 | useleft = USE_LEFT(svl); | |
28e5dec8 JH |
653 | /* We must see if we can perform the addition with integers if possible, |
654 | as the integer code detects overflow while the NV code doesn't. | |
655 | If either argument hasn't had a numeric conversion yet attempt to get | |
656 | the IV. It's important to do this now, rather than just assuming that | |
657 | it's not IOK as a PV of "9223372036854775806" may not take well to NV | |
658 | addition, and an SV which is NOK, NV=6.0 ought to be coerced to | |
659 | integer in case the second argument is IV=9223372036854775806 | |
660 | We can (now) rely on sv_2iv to do the right thing, only setting the | |
661 | public IOK flag if the value in the NV (or PV) slot is truly integer. | |
662 | ||
663 | A side effect is that this also aggressively prefers integer maths over | |
7dca457a NC |
664 | fp maths for integer values. |
665 | ||
a00b5bd3 | 666 | How to detect overflow? |
7dca457a NC |
667 | |
668 | C 99 section 6.2.6.1 says | |
669 | ||
670 | The range of nonnegative values of a signed integer type is a subrange | |
671 | of the corresponding unsigned integer type, and the representation of | |
672 | the same value in each type is the same. A computation involving | |
673 | unsigned operands can never overflow, because a result that cannot be | |
674 | represented by the resulting unsigned integer type is reduced modulo | |
675 | the number that is one greater than the largest value that can be | |
676 | represented by the resulting type. | |
677 | ||
678 | (the 9th paragraph) | |
679 | ||
680 | which I read as "unsigned ints wrap." | |
681 | ||
682 | signed integer overflow seems to be classed as "exception condition" | |
683 | ||
684 | If an exceptional condition occurs during the evaluation of an | |
685 | expression (that is, if the result is not mathematically defined or not | |
686 | in the range of representable values for its type), the behavior is | |
687 | undefined. | |
688 | ||
689 | (6.5, the 5th paragraph) | |
690 | ||
691 | I had assumed that on 2s complement machines signed arithmetic would | |
692 | wrap, hence coded pp_add and pp_subtract on the assumption that | |
693 | everything perl builds on would be happy. After much wailing and | |
694 | gnashing of teeth it would seem that irix64 knows its ANSI spec well, | |
695 | knows that it doesn't need to, and doesn't. Bah. Anyway, the all- | |
696 | unsigned code below is actually shorter than the old code. :-) | |
697 | */ | |
698 | ||
01f91bf2 | 699 | if (SvIV_please_nomg(svr)) { |
28e5dec8 JH |
700 | /* Unless the left argument is integer in range we are going to have to |
701 | use NV maths. Hence only attempt to coerce the right argument if | |
702 | we know the left is integer. */ | |
eb578fdb | 703 | UV auv = 0; |
9c5ffd7c | 704 | bool auvok = FALSE; |
7dca457a NC |
705 | bool a_valid = 0; |
706 | ||
28e5dec8 | 707 | if (!useleft) { |
7dca457a NC |
708 | auv = 0; |
709 | a_valid = auvok = 1; | |
710 | /* left operand is undef, treat as zero. + 0 is identity, | |
711 | Could SETi or SETu right now, but space optimise by not adding | |
712 | lots of code to speed up what is probably a rarish case. */ | |
713 | } else { | |
714 | /* Left operand is defined, so is it IV? */ | |
01f91bf2 | 715 | if (SvIV_please_nomg(svl)) { |
800401ee JH |
716 | if ((auvok = SvUOK(svl))) |
717 | auv = SvUVX(svl); | |
7dca457a | 718 | else { |
eb578fdb | 719 | const IV aiv = SvIVX(svl); |
7dca457a NC |
720 | if (aiv >= 0) { |
721 | auv = aiv; | |
722 | auvok = 1; /* Now acting as a sign flag. */ | |
53e2bfb7 DM |
723 | } else { |
724 | auv = (aiv == IV_MIN) ? (UV)aiv : (UV)(-aiv); | |
7dca457a NC |
725 | } |
726 | } | |
727 | a_valid = 1; | |
28e5dec8 JH |
728 | } |
729 | } | |
7dca457a NC |
730 | if (a_valid) { |
731 | bool result_good = 0; | |
732 | UV result; | |
eb578fdb | 733 | UV buv; |
800401ee | 734 | bool buvok = SvUOK(svr); |
a00b5bd3 | 735 | |
7dca457a | 736 | if (buvok) |
800401ee | 737 | buv = SvUVX(svr); |
7dca457a | 738 | else { |
eb578fdb | 739 | const IV biv = SvIVX(svr); |
7dca457a NC |
740 | if (biv >= 0) { |
741 | buv = biv; | |
742 | buvok = 1; | |
743 | } else | |
53e2bfb7 | 744 | buv = (biv == IV_MIN) ? (UV)biv : (UV)(-biv); |
7dca457a NC |
745 | } |
746 | /* ?uvok if value is >= 0. basically, flagged as UV if it's +ve, | |
602f51c4 | 747 | else "IV" now, independent of how it came in. |
7dca457a NC |
748 | if a, b represents positive, A, B negative, a maps to -A etc |
749 | a + b => (a + b) | |
750 | A + b => -(a - b) | |
751 | a + B => (a - b) | |
752 | A + B => -(a + b) | |
753 | all UV maths. negate result if A negative. | |
754 | add if signs same, subtract if signs differ. */ | |
755 | ||
756 | if (auvok ^ buvok) { | |
757 | /* Signs differ. */ | |
758 | if (auv >= buv) { | |
759 | result = auv - buv; | |
760 | /* Must get smaller */ | |
761 | if (result <= auv) | |
762 | result_good = 1; | |
763 | } else { | |
764 | result = buv - auv; | |
765 | if (result <= buv) { | |
766 | /* result really should be -(auv-buv). as its negation | |
767 | of true value, need to swap our result flag */ | |
768 | auvok = !auvok; | |
769 | result_good = 1; | |
28e5dec8 JH |
770 | } |
771 | } | |
7dca457a NC |
772 | } else { |
773 | /* Signs same */ | |
774 | result = auv + buv; | |
775 | if (result >= auv) | |
776 | result_good = 1; | |
777 | } | |
778 | if (result_good) { | |
779 | SP--; | |
780 | if (auvok) | |
28e5dec8 | 781 | SETu( result ); |
7dca457a NC |
782 | else { |
783 | /* Negate result */ | |
784 | if (result <= (UV)IV_MIN) | |
53e2bfb7 DM |
785 | SETi(result == (UV)IV_MIN |
786 | ? IV_MIN : -(IV)result); | |
7dca457a NC |
787 | else { |
788 | /* result valid, but out of range for IV. */ | |
789 | SETn( -(NV)result ); | |
28e5dec8 JH |
790 | } |
791 | } | |
7dca457a NC |
792 | RETURN; |
793 | } /* Overflow, drop through to NVs. */ | |
28e5dec8 JH |
794 | } |
795 | } | |
230ee21f DM |
796 | |
797 | #else | |
798 | useleft = USE_LEFT(svl); | |
28e5dec8 | 799 | #endif |
230ee21f | 800 | |
a0d0e21e | 801 | { |
6f1401dc | 802 | NV value = SvNV_nomg(svr); |
4efa5a16 | 803 | (void)POPs; |
28e5dec8 JH |
804 | if (!useleft) { |
805 | /* left operand is undef, treat as zero. + 0.0 is identity. */ | |
806 | SETn(value); | |
807 | RETURN; | |
808 | } | |
6f1401dc | 809 | SETn( value + SvNV_nomg(svl) ); |
28e5dec8 | 810 | RETURN; |
a0d0e21e LW |
811 | } |
812 | } | |
813 | ||
b1c05ba5 DM |
814 | |
815 | /* also used for: pp_aelemfast_lex() */ | |
816 | ||
a0d0e21e LW |
817 | PP(pp_aelemfast) |
818 | { | |
20b7effb | 819 | dSP; |
93bad3fd | 820 | AV * const av = PL_op->op_type == OP_AELEMFAST_LEX |
8f878375 | 821 | ? MUTABLE_AV(PAD_SV(PL_op->op_targ)) : GvAVn(cGVOP_gv); |
a3b680e6 | 822 | const U32 lval = PL_op->op_flags & OPf_MOD; |
7e169e84 DM |
823 | const I8 key = (I8)PL_op->op_private; |
824 | SV** svp; | |
825 | SV *sv; | |
826 | ||
827 | assert(SvTYPE(av) == SVt_PVAV); | |
828 | ||
f4484b87 DM |
829 | EXTEND(SP, 1); |
830 | ||
7e169e84 DM |
831 | /* inlined av_fetch() for simple cases ... */ |
832 | if (!SvRMAGICAL(av) && key >= 0 && key <= AvFILLp(av)) { | |
833 | sv = AvARRAY(av)[key]; | |
9fb994be | 834 | if (sv) { |
7e169e84 DM |
835 | PUSHs(sv); |
836 | RETURN; | |
837 | } | |
838 | } | |
839 | ||
840 | /* ... else do it the hard way */ | |
841 | svp = av_fetch(av, key, lval); | |
842 | sv = (svp ? *svp : &PL_sv_undef); | |
b024352e DM |
843 | |
844 | if (UNLIKELY(!svp && lval)) | |
7e169e84 | 845 | DIE(aTHX_ PL_no_aelem, (int)key); |
b024352e | 846 | |
39cf747a | 847 | if (!lval && SvRMAGICAL(av) && SvGMAGICAL(sv)) /* see note in pp_helem() */ |
fd69380d | 848 | mg_get(sv); |
be6c24e0 | 849 | PUSHs(sv); |
a0d0e21e LW |
850 | RETURN; |
851 | } | |
852 | ||
853 | PP(pp_join) | |
854 | { | |
20b7effb | 855 | dSP; dMARK; dTARGET; |
a0d0e21e LW |
856 | MARK++; |
857 | do_join(TARG, *MARK, MARK, SP); | |
858 | SP = MARK; | |
859 | SETs(TARG); | |
860 | RETURN; | |
861 | } | |
862 | ||
a0d0e21e LW |
863 | /* Oversized hot code. */ |
864 | ||
b1c05ba5 DM |
865 | /* also used for: pp_say() */ |
866 | ||
a0d0e21e LW |
867 | PP(pp_print) |
868 | { | |
20b7effb | 869 | dSP; dMARK; dORIGMARK; |
eb578fdb | 870 | PerlIO *fp; |
236988e4 | 871 | MAGIC *mg; |
159b6efe NC |
872 | GV * const gv |
873 | = (PL_op->op_flags & OPf_STACKED) ? MUTABLE_GV(*++MARK) : PL_defoutgv; | |
9c9f25b8 | 874 | IO *io = GvIO(gv); |
5b468f54 | 875 | |
9c9f25b8 | 876 | if (io |
ad64d0ec | 877 | && (mg = SvTIED_mg((const SV *)io, PERL_MAGIC_tiedscalar))) |
5b468f54 | 878 | { |
01bb7c6d | 879 | had_magic: |
68dc0745 | 880 | if (MARK == ORIGMARK) { |
1c846c1f | 881 | /* If using default handle then we need to make space to |
a60c0954 NIS |
882 | * pass object as 1st arg, so move other args up ... |
883 | */ | |
4352c267 | 884 | MEXTEND(SP, 1); |
68dc0745 | 885 | ++MARK; |
886 | Move(MARK, MARK + 1, (SP - MARK) + 1, SV*); | |
887 | ++SP; | |
888 | } | |
3e0cb5de | 889 | return Perl_tied_method(aTHX_ SV_CONST(PRINT), mark - 1, MUTABLE_SV(io), |
94bc412f NC |
890 | mg, |
891 | (G_SCALAR | TIED_METHOD_ARGUMENTS_ON_STACK | |
892 | | (PL_op->op_type == OP_SAY | |
893 | ? TIED_METHOD_SAY : 0)), sp - mark); | |
236988e4 | 894 | } |
9c9f25b8 | 895 | if (!io) { |
68b590d9 | 896 | if ( gv && GvEGVx(gv) && (io = GvIO(GvEGV(gv))) |
ad64d0ec | 897 | && (mg = SvTIED_mg((const SV *)io, PERL_MAGIC_tiedscalar))) |
01bb7c6d | 898 | goto had_magic; |
51087808 | 899 | report_evil_fh(gv); |
93189314 | 900 | SETERRNO(EBADF,RMS_IFI); |
a0d0e21e LW |
901 | goto just_say_no; |
902 | } | |
903 | else if (!(fp = IoOFP(io))) { | |
7716c5c5 NC |
904 | if (IoIFP(io)) |
905 | report_wrongway_fh(gv, '<'); | |
51087808 | 906 | else |
7716c5c5 | 907 | report_evil_fh(gv); |
93189314 | 908 | SETERRNO(EBADF,IoIFP(io)?RMS_FAC:RMS_IFI); |
a0d0e21e LW |
909 | goto just_say_no; |
910 | } | |
911 | else { | |
e23d9e2f | 912 | SV * const ofs = GvSV(PL_ofsgv); /* $, */ |
a0d0e21e | 913 | MARK++; |
e23d9e2f | 914 | if (ofs && (SvGMAGICAL(ofs) || SvOK(ofs))) { |
a0d0e21e LW |
915 | while (MARK <= SP) { |
916 | if (!do_print(*MARK, fp)) | |
917 | break; | |
918 | MARK++; | |
919 | if (MARK <= SP) { | |
e23d9e2f CS |
920 | /* don't use 'ofs' here - it may be invalidated by magic callbacks */ |
921 | if (!do_print(GvSV(PL_ofsgv), fp)) { | |
a0d0e21e LW |
922 | MARK--; |
923 | break; | |
924 | } | |
925 | } | |
926 | } | |
927 | } | |
928 | else { | |
929 | while (MARK <= SP) { | |
930 | if (!do_print(*MARK, fp)) | |
931 | break; | |
932 | MARK++; | |
933 | } | |
934 | } | |
935 | if (MARK <= SP) | |
936 | goto just_say_no; | |
937 | else { | |
cfc4a7da GA |
938 | if (PL_op->op_type == OP_SAY) { |
939 | if (PerlIO_write(fp, "\n", 1) == 0 || PerlIO_error(fp)) | |
940 | goto just_say_no; | |
941 | } | |
942 | else if (PL_ors_sv && SvOK(PL_ors_sv)) | |
7889fe52 | 943 | if (!do_print(PL_ors_sv, fp)) /* $\ */ |
a0d0e21e LW |
944 | goto just_say_no; |
945 | ||
946 | if (IoFLAGS(io) & IOf_FLUSH) | |
760ac839 | 947 | if (PerlIO_flush(fp) == EOF) |
a0d0e21e LW |
948 | goto just_say_no; |
949 | } | |
950 | } | |
951 | SP = ORIGMARK; | |
e52fd6f4 | 952 | XPUSHs(&PL_sv_yes); |
a0d0e21e LW |
953 | RETURN; |
954 | ||
955 | just_say_no: | |
956 | SP = ORIGMARK; | |
e52fd6f4 | 957 | XPUSHs(&PL_sv_undef); |
a0d0e21e LW |
958 | RETURN; |
959 | } | |
960 | ||
b1c05ba5 DM |
961 | |
962 | /* also used for: pp_rv2hv() */ | |
bdaf10a5 | 963 | /* also called directly by pp_lvavref */ |
b1c05ba5 | 964 | |
a0d0e21e LW |
965 | PP(pp_rv2av) |
966 | { | |
20b7effb | 967 | dSP; dTOPss; |
1c23e2bd | 968 | const U8 gimme = GIMME_V; |
13c59d41 MH |
969 | static const char an_array[] = "an ARRAY"; |
970 | static const char a_hash[] = "a HASH"; | |
bdaf10a5 FC |
971 | const bool is_pp_rv2av = PL_op->op_type == OP_RV2AV |
972 | || PL_op->op_type == OP_LVAVREF; | |
d83b45b8 | 973 | const svtype type = is_pp_rv2av ? SVt_PVAV : SVt_PVHV; |
a0d0e21e | 974 | |
9026059d | 975 | SvGETMAGIC(sv); |
a0d0e21e | 976 | if (SvROK(sv)) { |
5d9574c1 | 977 | if (UNLIKELY(SvAMAGIC(sv))) { |
93d7320b | 978 | sv = amagic_deref_call(sv, is_pp_rv2av ? to_av_amg : to_hv_amg); |
93d7320b | 979 | } |
17ab7946 | 980 | sv = SvRV(sv); |
5d9574c1 | 981 | if (UNLIKELY(SvTYPE(sv) != type)) |
dcbac5bb | 982 | /* diag_listed_as: Not an ARRAY reference */ |
13c59d41 | 983 | DIE(aTHX_ "Not %s reference", is_pp_rv2av ? an_array : a_hash); |
5d9574c1 DM |
984 | else if (UNLIKELY(PL_op->op_flags & OPf_MOD |
985 | && PL_op->op_private & OPpLVAL_INTRO)) | |
3da99855 | 986 | Perl_croak(aTHX_ "%s", PL_no_localize_ref); |
a0d0e21e | 987 | } |
5d9574c1 | 988 | else if (UNLIKELY(SvTYPE(sv) != type)) { |
67955e0c | 989 | GV *gv; |
1c846c1f | 990 | |
6e592b3a | 991 | if (!isGV_with_GP(sv)) { |
13c59d41 | 992 | gv = Perl_softref2xv(aTHX_ sv, is_pp_rv2av ? an_array : a_hash, |
dc3c76f8 NC |
993 | type, &sp); |
994 | if (!gv) | |
995 | RETURN; | |
35cd451c GS |
996 | } |
997 | else { | |
159b6efe | 998 | gv = MUTABLE_GV(sv); |
a0d0e21e | 999 | } |
ad64d0ec | 1000 | sv = is_pp_rv2av ? MUTABLE_SV(GvAVn(gv)) : MUTABLE_SV(GvHVn(gv)); |
533c011a | 1001 | if (PL_op->op_private & OPpLVAL_INTRO) |
ad64d0ec | 1002 | sv = is_pp_rv2av ? MUTABLE_SV(save_ary(gv)) : MUTABLE_SV(save_hash(gv)); |
9f527363 FC |
1003 | } |
1004 | if (PL_op->op_flags & OPf_REF) { | |
17ab7946 | 1005 | SETs(sv); |
a0d0e21e | 1006 | RETURN; |
9f527363 | 1007 | } |
5d9574c1 | 1008 | else if (UNLIKELY(PL_op->op_private & OPpMAYBE_LVSUB)) { |
40c94d11 FC |
1009 | const I32 flags = is_lvalue_sub(); |
1010 | if (flags && !(flags & OPpENTERSUB_INARGS)) { | |
cde874ca | 1011 | if (gimme != G_ARRAY) |
042560a6 | 1012 | goto croak_cant_return; |
17ab7946 | 1013 | SETs(sv); |
78f9721b | 1014 | RETURN; |
40c94d11 | 1015 | } |
a0d0e21e LW |
1016 | } |
1017 | ||
17ab7946 | 1018 | if (is_pp_rv2av) { |
502c6561 | 1019 | AV *const av = MUTABLE_AV(sv); |
636fe681 | 1020 | /* The guts of pp_rv2av */ |
96913b52 | 1021 | if (gimme == G_ARRAY) { |
d5524600 DM |
1022 | SP--; |
1023 | PUTBACK; | |
1024 | S_pushav(aTHX_ av); | |
1025 | SPAGAIN; | |
1c846c1f | 1026 | } |
96913b52 VP |
1027 | else if (gimme == G_SCALAR) { |
1028 | dTARGET; | |
c70927a6 | 1029 | const SSize_t maxarg = AvFILL(av) + 1; |
96913b52 | 1030 | SETi(maxarg); |
93965878 | 1031 | } |
17ab7946 NC |
1032 | } else { |
1033 | /* The guts of pp_rv2hv */ | |
96913b52 VP |
1034 | if (gimme == G_ARRAY) { /* array wanted */ |
1035 | *PL_stack_sp = sv; | |
981b7185 | 1036 | return Perl_do_kv(aTHX); |
96913b52 | 1037 | } |
c8fe3bdf | 1038 | else if ((PL_op->op_private & OPpTRUEBOOL |
adc42c31 | 1039 | || ( PL_op->op_private & OPpMAYBE_TRUEBOOL |
c8fe3bdf FC |
1040 | && block_gimme() == G_VOID )) |
1041 | && (!SvRMAGICAL(sv) || !mg_find(sv, PERL_MAGIC_tied))) | |
1042 | SETs(HvUSEDKEYS(sv) ? &PL_sv_yes : sv_2mortal(newSViv(0))); | |
96913b52 | 1043 | else if (gimme == G_SCALAR) { |
1a8bdda9 | 1044 | dTARG; |
96913b52 | 1045 | TARG = Perl_hv_scalar(aTHX_ MUTABLE_HV(sv)); |
96913b52 VP |
1046 | SETTARG; |
1047 | } | |
17ab7946 | 1048 | } |
be85d344 | 1049 | RETURN; |
042560a6 NC |
1050 | |
1051 | croak_cant_return: | |
1052 | Perl_croak(aTHX_ "Can't return %s to lvalue scalar context", | |
1053 | is_pp_rv2av ? "array" : "hash"); | |
77e217c6 | 1054 | RETURN; |
a0d0e21e LW |
1055 | } |
1056 | ||
10c8fecd | 1057 | STATIC void |
fb8f4cf8 | 1058 | S_do_oddball(pTHX_ SV **oddkey, SV **firstkey) |
10c8fecd | 1059 | { |
7918f24d NC |
1060 | PERL_ARGS_ASSERT_DO_ODDBALL; |
1061 | ||
fb8f4cf8 | 1062 | if (*oddkey) { |
6d822dc4 | 1063 | if (ckWARN(WARN_MISC)) { |
a3b680e6 | 1064 | const char *err; |
fb8f4cf8 RZ |
1065 | if (oddkey == firstkey && |
1066 | SvROK(*oddkey) && | |
1067 | (SvTYPE(SvRV(*oddkey)) == SVt_PVAV || | |
1068 | SvTYPE(SvRV(*oddkey)) == SVt_PVHV)) | |
10c8fecd | 1069 | { |
a3b680e6 | 1070 | err = "Reference found where even-sized list expected"; |
10c8fecd GS |
1071 | } |
1072 | else | |
a3b680e6 | 1073 | err = "Odd number of elements in hash assignment"; |
f1f66076 | 1074 | Perl_warner(aTHX_ packWARN(WARN_MISC), "%s", err); |
10c8fecd | 1075 | } |
6d822dc4 | 1076 | |
10c8fecd GS |
1077 | } |
1078 | } | |
1079 | ||
a5f48505 DM |
1080 | |
1081 | /* Do a mark and sweep with the SVf_BREAK flag to detect elements which | |
1082 | * are common to both the LHS and RHS of an aassign, and replace them | |
1083 | * with copies. All these copies are made before the actual list assign is | |
1084 | * done. | |
1085 | * | |
1086 | * For example in ($a,$b) = ($b,$a), assigning the value of the first RHS | |
1087 | * element ($b) to the first LH element ($a), modifies $a; when the | |
1088 | * second assignment is done, the second RH element now has the wrong | |
1089 | * value. So we initially replace the RHS with ($b, mortalcopy($a)). | |
1090 | * Note that we don't need to make a mortal copy of $b. | |
1091 | * | |
1092 | * The algorithm below works by, for every RHS element, mark the | |
1093 | * corresponding LHS target element with SVf_BREAK. Then if the RHS | |
1094 | * element is found with SVf_BREAK set, it means it would have been | |
1095 | * modified, so make a copy. | |
1096 | * Note that by scanning both LHS and RHS in lockstep, we avoid | |
1097 | * unnecessary copies (like $b above) compared with a naive | |
1098 | * "mark all LHS; copy all marked RHS; unmark all LHS". | |
1099 | * | |
1100 | * If the LHS element is a 'my' declaration' and has a refcount of 1, then | |
1101 | * it can't be common and can be skipped. | |
ebc643ce DM |
1102 | * |
1103 | * On DEBUGGING builds it takes an extra boolean, fake. If true, it means | |
1104 | * that we thought we didn't need to call S_aassign_copy_common(), but we | |
1105 | * have anyway for sanity checking. If we find we need to copy, then panic. | |
a5f48505 DM |
1106 | */ |
1107 | ||
1108 | PERL_STATIC_INLINE void | |
1109 | S_aassign_copy_common(pTHX_ SV **firstlelem, SV **lastlelem, | |
ebc643ce DM |
1110 | SV **firstrelem, SV **lastrelem |
1111 | #ifdef DEBUGGING | |
1112 | , bool fake | |
1113 | #endif | |
1114 | ) | |
a5f48505 DM |
1115 | { |
1116 | dVAR; | |
1117 | SV **relem; | |
1118 | SV **lelem; | |
1119 | SSize_t lcount = lastlelem - firstlelem + 1; | |
1120 | bool marked = FALSE; /* have we marked any LHS with SVf_BREAK ? */ | |
1121 | bool const do_rc1 = cBOOL(PL_op->op_private & OPpASSIGN_COMMON_RC1); | |
beb08a1e | 1122 | bool copy_all = FALSE; |
a5f48505 DM |
1123 | |
1124 | assert(!PL_in_clean_all); /* SVf_BREAK not already in use */ | |
1125 | assert(firstlelem < lastlelem); /* at least 2 LH elements */ | |
1126 | assert(firstrelem < lastrelem); /* at least 2 RH elements */ | |
1127 | ||
ebc643ce DM |
1128 | |
1129 | lelem = firstlelem; | |
a5f48505 DM |
1130 | /* we never have to copy the first RH element; it can't be corrupted |
1131 | * by assigning something to the corresponding first LH element. | |
1132 | * So this scan does in a loop: mark LHS[N]; test RHS[N+1] | |
1133 | */ | |
ebc643ce | 1134 | relem = firstrelem + 1; |
a5f48505 DM |
1135 | |
1136 | for (; relem <= lastrelem; relem++) { | |
1137 | SV *svr; | |
1138 | ||
1139 | /* mark next LH element */ | |
1140 | ||
1141 | if (--lcount >= 0) { | |
1142 | SV *svl = *lelem++; | |
1143 | ||
1144 | if (UNLIKELY(!svl)) {/* skip AV alias marker */ | |
1145 | assert (lelem <= lastlelem); | |
1146 | svl = *lelem++; | |
1147 | lcount--; | |
1148 | } | |
1149 | ||
1150 | assert(svl); | |
beb08a1e TC |
1151 | if (SvSMAGICAL(svl)) { |
1152 | copy_all = TRUE; | |
1153 | } | |
a5f48505 DM |
1154 | if (SvTYPE(svl) == SVt_PVAV || SvTYPE(svl) == SVt_PVHV) { |
1155 | if (!marked) | |
1156 | return; | |
1157 | /* this LH element will consume all further args; | |
1158 | * no need to mark any further LH elements (if any). | |
1159 | * But we still need to scan any remaining RHS elements; | |
1160 | * set lcount negative to distinguish from lcount == 0, | |
1161 | * so the loop condition continues being true | |
1162 | */ | |
1163 | lcount = -1; | |
1164 | lelem--; /* no need to unmark this element */ | |
1165 | } | |
1166 | else if (!(do_rc1 && SvREFCNT(svl) == 1) && svl != &PL_sv_undef) { | |
1167 | assert(!SvIMMORTAL(svl)); | |
1168 | SvFLAGS(svl) |= SVf_BREAK; | |
1169 | marked = TRUE; | |
1170 | } | |
1171 | else if (!marked) { | |
1172 | /* don't check RH element if no SVf_BREAK flags set yet */ | |
1173 | if (!lcount) | |
1174 | break; | |
1175 | continue; | |
1176 | } | |
1177 | } | |
1178 | ||
1179 | /* see if corresponding RH element needs copying */ | |
1180 | ||
1181 | assert(marked); | |
1182 | svr = *relem; | |
1183 | assert(svr); | |
1184 | ||
5c1db569 | 1185 | if (UNLIKELY(SvFLAGS(svr) & (SVf_BREAK|SVs_GMG) || copy_all)) { |
a5f48505 | 1186 | |
ebc643ce DM |
1187 | #ifdef DEBUGGING |
1188 | if (fake) { | |
9ae0115f | 1189 | /* op_dump(PL_op); */ |
ebc643ce DM |
1190 | Perl_croak(aTHX_ |
1191 | "panic: aassign skipped needed copy of common RH elem %" | |
1192 | UVuf, (UV)(relem - firstrelem)); | |
1193 | } | |
1194 | #endif | |
1195 | ||
a5f48505 DM |
1196 | TAINT_NOT; /* Each item is independent */ |
1197 | ||
1198 | /* Dear TODO test in t/op/sort.t, I love you. | |
1199 | (It's relying on a panic, not a "semi-panic" from newSVsv() | |
1200 | and then an assertion failure below.) */ | |
1201 | if (UNLIKELY(SvIS_FREED(svr))) { | |
1202 | Perl_croak(aTHX_ "panic: attempt to copy freed scalar %p", | |
1203 | (void*)svr); | |
1204 | } | |
1205 | /* avoid break flag while copying; otherwise COW etc | |
1206 | * disabled... */ | |
1207 | SvFLAGS(svr) &= ~SVf_BREAK; | |
1208 | /* Not newSVsv(), as it does not allow copy-on-write, | |
8c1e192f DM |
1209 | resulting in wasteful copies. |
1210 | Also, we use SV_NOSTEAL in case the SV is used more than | |
1211 | once, e.g. (...) = (f())[0,0] | |
1212 | Where the same SV appears twice on the RHS without a ref | |
1213 | count bump. (Although I suspect that the SV won't be | |
1214 | stealable here anyway - DAPM). | |
1215 | */ | |
a5f48505 DM |
1216 | *relem = sv_mortalcopy_flags(svr, |
1217 | SV_GMAGIC|SV_DO_COW_SVSETSV|SV_NOSTEAL); | |
1218 | /* ... but restore afterwards in case it's needed again, | |
1219 | * e.g. ($a,$b,$c) = (1,$a,$a) | |
1220 | */ | |
1221 | SvFLAGS(svr) |= SVf_BREAK; | |
1222 | } | |
1223 | ||
1224 | if (!lcount) | |
1225 | break; | |
1226 | } | |
1227 | ||
1228 | if (!marked) | |
1229 | return; | |
1230 | ||
1231 | /*unmark LHS */ | |
1232 | ||
1233 | while (lelem > firstlelem) { | |
1234 | SV * const svl = *(--lelem); | |
1235 | if (svl) | |
1236 | SvFLAGS(svl) &= ~SVf_BREAK; | |
1237 | } | |
1238 | } | |
1239 | ||
1240 | ||
1241 | ||
a0d0e21e LW |
1242 | PP(pp_aassign) |
1243 | { | |
27da23d5 | 1244 | dVAR; dSP; |
3280af22 NIS |
1245 | SV **lastlelem = PL_stack_sp; |
1246 | SV **lastrelem = PL_stack_base + POPMARK; | |
1247 | SV **firstrelem = PL_stack_base + POPMARK + 1; | |
a0d0e21e LW |
1248 | SV **firstlelem = lastrelem + 1; |
1249 | ||
eb578fdb KW |
1250 | SV **relem; |
1251 | SV **lelem; | |
a0d0e21e | 1252 | |
eb578fdb KW |
1253 | SV *sv; |
1254 | AV *ary; | |
a0d0e21e | 1255 | |
1c23e2bd | 1256 | U8 gimme; |
a0d0e21e | 1257 | HV *hash; |
c70927a6 | 1258 | SSize_t i; |
a0d0e21e | 1259 | int magic; |
a5f48505 | 1260 | U32 lval; |
a68090fe DM |
1261 | /* PL_delaymagic is restored by JUMPENV_POP on dieing, so we |
1262 | * only need to save locally, not on the save stack */ | |
1263 | U16 old_delaymagic = PL_delaymagic; | |
ebc643ce DM |
1264 | #ifdef DEBUGGING |
1265 | bool fake = 0; | |
1266 | #endif | |
5637b936 | 1267 | |
3280af22 | 1268 | PL_delaymagic = DM_DELAY; /* catch simultaneous items */ |
a0d0e21e LW |
1269 | |
1270 | /* If there's a common identifier on both sides we have to take | |
1271 | * special care that assigning the identifier on the left doesn't | |
1272 | * clobber a value on the right that's used later in the list. | |
1273 | */ | |
acdea6f0 | 1274 | |
beb08a1e TC |
1275 | /* at least 2 LH and RH elements, or commonality isn't an issue */ |
1276 | if (firstlelem < lastlelem && firstrelem < lastrelem) { | |
5c1db569 TC |
1277 | for (relem = firstrelem+1; relem <= lastrelem; relem++) { |
1278 | if (SvGMAGICAL(*relem)) | |
1279 | goto do_scan; | |
1280 | } | |
beb08a1e TC |
1281 | for (lelem = firstlelem; lelem <= lastlelem; lelem++) { |
1282 | if (*lelem && SvSMAGICAL(*lelem)) | |
1283 | goto do_scan; | |
a5f48505 | 1284 | } |
beb08a1e TC |
1285 | if ( PL_op->op_private & (OPpASSIGN_COMMON_SCALAR|OPpASSIGN_COMMON_RC1) ) { |
1286 | if (PL_op->op_private & OPpASSIGN_COMMON_RC1) { | |
1287 | /* skip the scan if all scalars have a ref count of 1 */ | |
1288 | for (lelem = firstlelem; lelem <= lastlelem; lelem++) { | |
1289 | sv = *lelem; | |
1290 | if (!sv || SvREFCNT(sv) == 1) | |
1291 | continue; | |
1292 | if (SvTYPE(sv) != SVt_PVAV && SvTYPE(sv) != SVt_PVAV) | |
1293 | goto do_scan; | |
1294 | break; | |
1295 | } | |
1296 | } | |
1297 | else { | |
1298 | do_scan: | |
1299 | S_aassign_copy_common(aTHX_ | |
1300 | firstlelem, lastlelem, firstrelem, lastrelem | |
ebc643ce | 1301 | #ifdef DEBUGGING |
beb08a1e | 1302 | , fake |
ebc643ce | 1303 | #endif |
beb08a1e TC |
1304 | ); |
1305 | } | |
a5f48505 | 1306 | } |
a0d0e21e | 1307 | } |
ebc643ce DM |
1308 | #ifdef DEBUGGING |
1309 | else { | |
1310 | /* on debugging builds, do the scan even if we've concluded we | |
1311 | * don't need to, then panic if we find commonality. Note that the | |
1312 | * scanner assumes at least 2 elements */ | |
1313 | if (firstlelem < lastlelem && firstrelem < lastrelem) { | |
1314 | fake = 1; | |
1315 | goto do_scan; | |
1316 | } | |
1317 | } | |
1318 | #endif | |
a0d0e21e | 1319 | |
a5f48505 DM |
1320 | gimme = GIMME_V; |
1321 | lval = (gimme == G_ARRAY) ? (PL_op->op_flags & OPf_MOD || LVRET) : 0; | |
1322 | ||
a0d0e21e LW |
1323 | relem = firstrelem; |
1324 | lelem = firstlelem; | |
4608196e RGS |
1325 | ary = NULL; |
1326 | hash = NULL; | |
10c8fecd | 1327 | |
5d9574c1 | 1328 | while (LIKELY(lelem <= lastlelem)) { |
bdaf10a5 | 1329 | bool alias = FALSE; |
bbce6d69 | 1330 | TAINT_NOT; /* Each item stands on its own, taintwise. */ |
a0d0e21e | 1331 | sv = *lelem++; |
bdaf10a5 FC |
1332 | if (UNLIKELY(!sv)) { |
1333 | alias = TRUE; | |
1334 | sv = *lelem++; | |
1335 | ASSUME(SvTYPE(sv) == SVt_PVAV); | |
1336 | } | |
a0d0e21e | 1337 | switch (SvTYPE(sv)) { |
a5f48505 DM |
1338 | case SVt_PVAV: { |
1339 | bool already_copied = FALSE; | |
60edcf09 | 1340 | ary = MUTABLE_AV(sv); |
748a9306 | 1341 | magic = SvMAGICAL(ary) != 0; |
60edcf09 FC |
1342 | ENTER; |
1343 | SAVEFREESV(SvREFCNT_inc_simple_NN(sv)); | |
a5f48505 DM |
1344 | |
1345 | /* We need to clear ary. The is a danger that if we do this, | |
1346 | * elements on the RHS may be prematurely freed, e.g. | |
1347 | * @a = ($a[0]); | |
1348 | * In the case of possible commonality, make a copy of each | |
1349 | * RHS SV *before* clearing the array, and add a reference | |
1350 | * from the tmps stack, so that it doesn't leak on death. | |
1351 | * Otherwise, make a copy of each RHS SV only as we're storing | |
1352 | * it into the array - that way we don't have to worry about | |
1353 | * it being leaked if we die, but don't incur the cost of | |
1354 | * mortalising everything. | |
1355 | */ | |
1356 | ||
1357 | if ( (PL_op->op_private & OPpASSIGN_COMMON_AGG) | |
1358 | && (relem <= lastrelem) | |
1359 | && (magic || AvFILL(ary) != -1)) | |
1360 | { | |
1361 | SV **svp; | |
1362 | EXTEND_MORTAL(lastrelem - relem + 1); | |
1363 | for (svp = relem; svp <= lastrelem; svp++) { | |
8c1e192f | 1364 | /* see comment in S_aassign_copy_common about SV_NOSTEAL */ |
a5f48505 DM |
1365 | *svp = sv_mortalcopy_flags(*svp, |
1366 | SV_GMAGIC|SV_DO_COW_SVSETSV|SV_NOSTEAL); | |
1367 | TAINT_NOT; | |
1368 | } | |
1369 | already_copied = TRUE; | |
1370 | } | |
1371 | ||
1372 | av_clear(ary); | |
6768377c DM |
1373 | if (relem <= lastrelem) |
1374 | av_extend(ary, lastrelem - relem); | |
1375 | ||
a0d0e21e LW |
1376 | i = 0; |
1377 | while (relem <= lastrelem) { /* gobble up all the rest */ | |
5117ca91 | 1378 | SV **didstore; |
bdaf10a5 | 1379 | if (LIKELY(!alias)) { |
a5f48505 DM |
1380 | if (already_copied) |
1381 | sv = *relem; | |
1382 | else { | |
1383 | if (LIKELY(*relem)) | |
1384 | /* before newSV, in case it dies */ | |
1385 | SvGETMAGIC(*relem); | |
1386 | sv = newSV(0); | |
8c1e192f DM |
1387 | /* see comment in S_aassign_copy_common about |
1388 | * SV_NOSTEAL */ | |
1389 | sv_setsv_flags(sv, *relem, | |
1390 | (SV_DO_COW_SVSETSV|SV_NOSTEAL)); | |
a5f48505 DM |
1391 | *relem = sv; |
1392 | } | |
bdaf10a5 FC |
1393 | } |
1394 | else { | |
a5f48505 DM |
1395 | if (!already_copied) |
1396 | SvGETMAGIC(*relem); | |
bdaf10a5 FC |
1397 | if (!SvROK(*relem)) |
1398 | DIE(aTHX_ "Assigned value is not a reference"); | |
1399 | if (SvTYPE(SvRV(*relem)) > SVt_PVLV) | |
1400 | /* diag_listed_as: Assigned value is not %s reference */ | |
1401 | DIE(aTHX_ | |
1402 | "Assigned value is not a SCALAR reference"); | |
a5f48505 | 1403 | if (lval && !already_copied) |
bdaf10a5 FC |
1404 | *relem = sv_mortalcopy(*relem); |
1405 | /* XXX else check for weak refs? */ | |
0ad694a7 | 1406 | sv = SvREFCNT_inc_NN(SvRV(*relem)); |
bdaf10a5 FC |
1407 | } |
1408 | relem++; | |
a5f48505 | 1409 | if (already_copied) |
0ad694a7 | 1410 | SvREFCNT_inc_simple_void_NN(sv); /* undo mortal free */ |
5117ca91 GS |
1411 | didstore = av_store(ary,i++,sv); |
1412 | if (magic) { | |
18024492 FC |
1413 | if (!didstore) |
1414 | sv_2mortal(sv); | |
8ef24240 | 1415 | if (SvSMAGICAL(sv)) |
fb73857a | 1416 | mg_set(sv); |
5117ca91 | 1417 | } |
bbce6d69 | 1418 | TAINT_NOT; |
a0d0e21e | 1419 | } |
5d9574c1 | 1420 | if (UNLIKELY(PL_delaymagic & DM_ARRAY_ISA)) |
ad64d0ec | 1421 | SvSETMAGIC(MUTABLE_SV(ary)); |
60edcf09 | 1422 | LEAVE; |
a0d0e21e | 1423 | break; |
a5f48505 DM |
1424 | } |
1425 | ||
10c8fecd | 1426 | case SVt_PVHV: { /* normal hash */ |
a0d0e21e | 1427 | SV *tmpstr; |
1c4ea384 RZ |
1428 | int odd; |
1429 | int duplicates = 0; | |
45960564 | 1430 | SV** topelem = relem; |
1c4ea384 | 1431 | SV **firsthashrelem = relem; |
a5f48505 | 1432 | bool already_copied = FALSE; |
a0d0e21e | 1433 | |
60edcf09 | 1434 | hash = MUTABLE_HV(sv); |
748a9306 | 1435 | magic = SvMAGICAL(hash) != 0; |
1c4ea384 RZ |
1436 | |
1437 | odd = ((lastrelem - firsthashrelem)&1)? 0 : 1; | |
5d9574c1 | 1438 | if (UNLIKELY(odd)) { |
fb8f4cf8 | 1439 | do_oddball(lastrelem, firsthashrelem); |
1d2b3927 HS |
1440 | /* we have firstlelem to reuse, it's not needed anymore |
1441 | */ | |
1c4ea384 RZ |
1442 | *(lastrelem+1) = &PL_sv_undef; |
1443 | } | |
1444 | ||
60edcf09 FC |
1445 | ENTER; |
1446 | SAVEFREESV(SvREFCNT_inc_simple_NN(sv)); | |
a5f48505 DM |
1447 | |
1448 | /* We need to clear hash. The is a danger that if we do this, | |
1449 | * elements on the RHS may be prematurely freed, e.g. | |
1450 | * %h = (foo => $h{bar}); | |
1451 | * In the case of possible commonality, make a copy of each | |
1452 | * RHS SV *before* clearing the hash, and add a reference | |
1453 | * from the tmps stack, so that it doesn't leak on death. | |
1454 | */ | |
1455 | ||
1456 | if ( (PL_op->op_private & OPpASSIGN_COMMON_AGG) | |
1457 | && (relem <= lastrelem) | |
1458 | && (magic || HvUSEDKEYS(hash))) | |
1459 | { | |
1460 | SV **svp; | |
1461 | EXTEND_MORTAL(lastrelem - relem + 1); | |
1462 | for (svp = relem; svp <= lastrelem; svp++) { | |
1463 | *svp = sv_mortalcopy_flags(*svp, | |
1464 | SV_GMAGIC|SV_DO_COW_SVSETSV|SV_NOSTEAL); | |
1465 | TAINT_NOT; | |
1466 | } | |
1467 | already_copied = TRUE; | |
1468 | } | |
1469 | ||
a0d0e21e | 1470 | hv_clear(hash); |
a5f48505 | 1471 | |
5d9574c1 | 1472 | while (LIKELY(relem < lastrelem+odd)) { /* gobble up all the rest */ |
5117ca91 | 1473 | HE *didstore; |
1c4ea384 | 1474 | assert(*relem); |
632b9d6f FC |
1475 | /* Copy the key if aassign is called in lvalue context, |
1476 | to avoid having the next op modify our rhs. Copy | |
1477 | it also if it is gmagical, lest it make the | |
1478 | hv_store_ent call below croak, leaking the value. */ | |
a5f48505 | 1479 | sv = (lval || SvGMAGICAL(*relem)) && !already_copied |
632b9d6f FC |
1480 | ? sv_mortalcopy(*relem) |
1481 | : *relem; | |
45960564 | 1482 | relem++; |
1c4ea384 | 1483 | assert(*relem); |
a5f48505 DM |
1484 | if (already_copied) |
1485 | tmpstr = *relem++; | |
1486 | else { | |
1487 | SvGETMAGIC(*relem); | |
1488 | tmpstr = newSV(0); | |
1489 | sv_setsv_nomg(tmpstr,*relem++); /* value */ | |
1490 | } | |
1491 | ||
a88bf2bc | 1492 | if (gimme == G_ARRAY) { |
45960564 DM |
1493 | if (hv_exists_ent(hash, sv, 0)) |
1494 | /* key overwrites an existing entry */ | |
1495 | duplicates += 2; | |
a88bf2bc | 1496 | else { |
45960564 | 1497 | /* copy element back: possibly to an earlier |
1d2b3927 HS |
1498 | * stack location if we encountered dups earlier, |
1499 | * possibly to a later stack location if odd */ | |
45960564 DM |
1500 | *topelem++ = sv; |
1501 | *topelem++ = tmpstr; | |
1502 | } | |
1503 | } | |
a5f48505 | 1504 | if (already_copied) |
0ad694a7 | 1505 | SvREFCNT_inc_simple_void_NN(tmpstr); /* undo mortal free */ |
5117ca91 | 1506 | didstore = hv_store_ent(hash,sv,tmpstr,0); |
632b9d6f FC |
1507 | if (magic) { |
1508 | if (!didstore) sv_2mortal(tmpstr); | |
1509 | SvSETMAGIC(tmpstr); | |
1510 | } | |
bbce6d69 | 1511 | TAINT_NOT; |
8e07c86e | 1512 | } |
60edcf09 | 1513 | LEAVE; |
1c4ea384 RZ |
1514 | if (duplicates && gimme == G_ARRAY) { |
1515 | /* at this point we have removed the duplicate key/value | |
1516 | * pairs from the stack, but the remaining values may be | |
1517 | * wrong; i.e. with (a 1 a 2 b 3) on the stack we've removed | |
1518 | * the (a 2), but the stack now probably contains | |
1519 | * (a <freed> b 3), because { hv_save(a,1); hv_save(a,2) } | |
1520 | * obliterates the earlier key. So refresh all values. */ | |
1521 | lastrelem -= duplicates; | |
1522 | relem = firsthashrelem; | |
1523 | while (relem < lastrelem+odd) { | |
1524 | HE *he; | |
1525 | he = hv_fetch_ent(hash, *relem++, 0, 0); | |
1526 | *relem++ = (he ? HeVAL(he) : &PL_sv_undef); | |
1527 | } | |
1528 | } | |
1529 | if (odd && gimme == G_ARRAY) lastrelem++; | |
a0d0e21e LW |
1530 | } |
1531 | break; | |
1532 | default: | |
6fc92669 GS |
1533 | if (SvIMMORTAL(sv)) { |
1534 | if (relem <= lastrelem) | |
1535 | relem++; | |
1536 | break; | |
a0d0e21e LW |
1537 | } |
1538 | if (relem <= lastrelem) { | |
5d9574c1 | 1539 | if (UNLIKELY( |
1c70fb82 FC |
1540 | SvTEMP(sv) && !SvSMAGICAL(sv) && SvREFCNT(sv) == 1 && |
1541 | (!isGV_with_GP(sv) || SvFAKE(sv)) && ckWARN(WARN_MISC) | |
5d9574c1 | 1542 | )) |
1c70fb82 FC |
1543 | Perl_warner(aTHX_ |
1544 | packWARN(WARN_MISC), | |
1545 | "Useless assignment to a temporary" | |
1546 | ); | |
a0d0e21e LW |
1547 | sv_setsv(sv, *relem); |
1548 | *(relem++) = sv; | |
1549 | } | |
1550 | else | |
3280af22 | 1551 | sv_setsv(sv, &PL_sv_undef); |
8ef24240 | 1552 | SvSETMAGIC(sv); |
a0d0e21e LW |
1553 | break; |
1554 | } | |
1555 | } | |
5d9574c1 | 1556 | if (UNLIKELY(PL_delaymagic & ~DM_DELAY)) { |
985213f2 | 1557 | /* Will be used to set PL_tainting below */ |
dfff4baf BF |
1558 | Uid_t tmp_uid = PerlProc_getuid(); |
1559 | Uid_t tmp_euid = PerlProc_geteuid(); | |
1560 | Gid_t tmp_gid = PerlProc_getgid(); | |
1561 | Gid_t tmp_egid = PerlProc_getegid(); | |
985213f2 | 1562 | |
b469f1e0 | 1563 | /* XXX $> et al currently silently ignore failures */ |
3280af22 | 1564 | if (PL_delaymagic & DM_UID) { |
a0d0e21e | 1565 | #ifdef HAS_SETRESUID |
b469f1e0 JH |
1566 | PERL_UNUSED_RESULT( |
1567 | setresuid((PL_delaymagic & DM_RUID) ? PL_delaymagic_uid : (Uid_t)-1, | |
1568 | (PL_delaymagic & DM_EUID) ? PL_delaymagic_euid : (Uid_t)-1, | |
1569 | (Uid_t)-1)); | |
56febc5e AD |
1570 | #else |
1571 | # ifdef HAS_SETREUID | |
b469f1e0 JH |
1572 | PERL_UNUSED_RESULT( |
1573 | setreuid((PL_delaymagic & DM_RUID) ? PL_delaymagic_uid : (Uid_t)-1, | |
1574 | (PL_delaymagic & DM_EUID) ? PL_delaymagic_euid : (Uid_t)-1)); | |
56febc5e AD |
1575 | # else |
1576 | # ifdef HAS_SETRUID | |
b28d0864 | 1577 | if ((PL_delaymagic & DM_UID) == DM_RUID) { |
b469f1e0 | 1578 | PERL_UNUSED_RESULT(setruid(PL_delaymagic_uid)); |
b28d0864 | 1579 | PL_delaymagic &= ~DM_RUID; |
a0d0e21e | 1580 | } |
56febc5e AD |
1581 | # endif /* HAS_SETRUID */ |
1582 | # ifdef HAS_SETEUID | |
b28d0864 | 1583 | if ((PL_delaymagic & DM_UID) == DM_EUID) { |
b469f1e0 | 1584 | PERL_UNUSED_RESULT(seteuid(PL_delaymagic_euid)); |
b28d0864 | 1585 | PL_delaymagic &= ~DM_EUID; |
a0d0e21e | 1586 | } |
56febc5e | 1587 | # endif /* HAS_SETEUID */ |
b28d0864 | 1588 | if (PL_delaymagic & DM_UID) { |
985213f2 | 1589 | if (PL_delaymagic_uid != PL_delaymagic_euid) |
cea2e8a9 | 1590 | DIE(aTHX_ "No setreuid available"); |
b469f1e0 | 1591 | PERL_UNUSED_RESULT(PerlProc_setuid(PL_delaymagic_uid)); |
a0d0e21e | 1592 | } |
56febc5e AD |
1593 | # endif /* HAS_SETREUID */ |
1594 | #endif /* HAS_SETRESUID */ | |
04783dc7 | 1595 | |
985213f2 AB |
1596 | tmp_uid = PerlProc_getuid(); |
1597 | tmp_euid = PerlProc_geteuid(); | |
a0d0e21e | 1598 | } |
b469f1e0 | 1599 | /* XXX $> et al currently silently ignore failures */ |
3280af22 | 1600 | if (PL_delaymagic & DM_GID) { |
a0d0e21e | 1601 | #ifdef HAS_SETRESGID |
b469f1e0 JH |
1602 | PERL_UNUSED_RESULT( |
1603 | setresgid((PL_delaymagic & DM_RGID) ? PL_delaymagic_gid : (Gid_t)-1, | |
1604 | (PL_delaymagic & DM_EGID) ? PL_delaymagic_egid : (Gid_t)-1, | |
1605 | (Gid_t)-1)); | |
56febc5e AD |
1606 | #else |
1607 | # ifdef HAS_SETREGID | |
b469f1e0 JH |
1608 | PERL_UNUSED_RESULT( |
1609 | setregid((PL_delaymagic & DM_RGID) ? PL_delaymagic_gid : (Gid_t)-1, | |
1610 | (PL_delaymagic & DM_EGID) ? PL_delaymagic_egid : (Gid_t)-1)); | |
56febc5e AD |
1611 | # else |
1612 | # ifdef HAS_SETRGID | |
b28d0864 | 1613 | if ((PL_delaymagic & DM_GID) == DM_RGID) { |
b469f1e0 | 1614 | PERL_UNUSED_RESULT(setrgid(PL_delaymagic_gid)); |
b28d0864 | 1615 | PL_delaymagic &= ~DM_RGID; |
a0d0e21e | 1616 | } |
56febc5e AD |
1617 | # endif /* HAS_SETRGID */ |
1618 | # ifdef HAS_SETEGID | |
b28d0864 | 1619 | if ((PL_delaymagic & DM_GID) == DM_EGID) { |
b469f1e0 | 1620 | PERL_UNUSED_RESULT(setegid(PL_delaymagic_egid)); |
b28d0864 | 1621 | PL_delaymagic &= ~DM_EGID; |
a0d0e21e | 1622 | } |
56febc5e | 1623 | # endif /* HAS_SETEGID */ |
b28d0864 | 1624 | if (PL_delaymagic & DM_GID) { |
985213f2 | 1625 | if (PL_delaymagic_gid != PL_delaymagic_egid) |
cea2e8a9 | 1626 | DIE(aTHX_ "No setregid available"); |
b469f1e0 | 1627 | PERL_UNUSED_RESULT(PerlProc_setgid(PL_delaymagic_gid)); |
a0d0e21e | 1628 | } |
56febc5e AD |
1629 | # endif /* HAS_SETREGID */ |
1630 | #endif /* HAS_SETRESGID */ | |
04783dc7 | 1631 | |
985213f2 AB |
1632 | tmp_gid = PerlProc_getgid(); |
1633 | tmp_egid = PerlProc_getegid(); | |
a0d0e21e | 1634 | } |
284167a5 | 1635 | TAINTING_set( TAINTING_get | (tmp_uid && (tmp_euid != tmp_uid || tmp_egid != tmp_gid)) ); |
9a9b5ec9 DM |
1636 | #ifdef NO_TAINT_SUPPORT |
1637 | PERL_UNUSED_VAR(tmp_uid); | |
1638 | PERL_UNUSED_VAR(tmp_euid); | |
1639 | PERL_UNUSED_VAR(tmp_gid); | |
1640 | PERL_UNUSED_VAR(tmp_egid); | |
1641 | #endif | |
a0d0e21e | 1642 | } |
a68090fe | 1643 | PL_delaymagic = old_delaymagic; |
54310121 | 1644 | |
54310121 | 1645 | if (gimme == G_VOID) |
1646 | SP = firstrelem - 1; | |
1647 | else if (gimme == G_SCALAR) { | |
1648 | dTARGET; | |
1649 | SP = firstrelem; | |
231cbeb2 | 1650 | SETi(lastrelem - firstrelem + 1); |
54310121 | 1651 | } |
1652 | else { | |
1c4ea384 | 1653 | if (ary || hash) |
1d2b3927 HS |
1654 | /* note that in this case *firstlelem may have been overwritten |
1655 | by sv_undef in the odd hash case */ | |
a0d0e21e | 1656 | SP = lastrelem; |
1c4ea384 | 1657 | else { |
a0d0e21e | 1658 | SP = firstrelem + (lastlelem - firstlelem); |
1c4ea384 RZ |
1659 | lelem = firstlelem + (relem - firstrelem); |
1660 | while (relem <= SP) | |
1661 | *relem++ = (lelem <= lastlelem) ? *lelem++ : &PL_sv_undef; | |
1662 | } | |
a0d0e21e | 1663 | } |
08aeb9f7 | 1664 | |
54310121 | 1665 | RETURN; |
a0d0e21e LW |
1666 | } |
1667 | ||
8782bef2 GB |
1668 | PP(pp_qr) |
1669 | { | |
20b7effb | 1670 | dSP; |
eb578fdb | 1671 | PMOP * const pm = cPMOP; |
fe578d7f | 1672 | REGEXP * rx = PM_GETRE(pm); |
10599a69 | 1673 | SV * const pkg = rx ? CALLREG_PACKAGE(rx) : NULL; |
c4420975 | 1674 | SV * const rv = sv_newmortal(); |
d63c20f2 DM |
1675 | CV **cvp; |
1676 | CV *cv; | |
288b8c02 NC |
1677 | |
1678 | SvUPGRADE(rv, SVt_IV); | |
c2123ae3 NC |
1679 | /* For a subroutine describing itself as "This is a hacky workaround" I'm |
1680 | loathe to use it here, but it seems to be the right fix. Or close. | |
1681 | The key part appears to be that it's essential for pp_qr to return a new | |
1682 | object (SV), which implies that there needs to be an effective way to | |
1683 | generate a new SV from the existing SV that is pre-compiled in the | |
1684 | optree. */ | |
1685 | SvRV_set(rv, MUTABLE_SV(reg_temp_copy(NULL, rx))); | |
288b8c02 NC |
1686 | SvROK_on(rv); |
1687 | ||
8d919b0a | 1688 | cvp = &( ReANY((REGEXP *)SvRV(rv))->qr_anoncv); |
5d9574c1 | 1689 | if (UNLIKELY((cv = *cvp) && CvCLONE(*cvp))) { |
d63c20f2 | 1690 | *cvp = cv_clone(cv); |
fc2b2dca | 1691 | SvREFCNT_dec_NN(cv); |
d63c20f2 DM |
1692 | } |
1693 | ||
288b8c02 | 1694 | if (pkg) { |
f815daf2 | 1695 | HV *const stash = gv_stashsv(pkg, GV_ADD); |
fc2b2dca | 1696 | SvREFCNT_dec_NN(pkg); |
288b8c02 NC |
1697 | (void)sv_bless(rv, stash); |
1698 | } | |
1699 | ||
5d9574c1 | 1700 | if (UNLIKELY(RX_ISTAINTED(rx))) { |
e08e52cf | 1701 | SvTAINTED_on(rv); |
9274aefd DM |
1702 | SvTAINTED_on(SvRV(rv)); |
1703 | } | |
c8c13c22 JB |
1704 | XPUSHs(rv); |
1705 | RETURN; | |
8782bef2 GB |
1706 | } |
1707 | ||
a0d0e21e LW |
1708 | PP(pp_match) |
1709 | { | |
20b7effb | 1710 | dSP; dTARG; |
eb578fdb | 1711 | PMOP *pm = cPMOP; |
d65afb4b | 1712 | PMOP *dynpm = pm; |
eb578fdb | 1713 | const char *s; |
5c144d81 | 1714 | const char *strend; |
99a90e59 | 1715 | SSize_t curpos = 0; /* initial pos() or current $+[0] */ |
a0d0e21e | 1716 | I32 global; |
7fadf4a7 | 1717 | U8 r_flags = 0; |
5c144d81 | 1718 | const char *truebase; /* Start of string */ |
eb578fdb | 1719 | REGEXP *rx = PM_GETRE(pm); |
b3eb6a9b | 1720 | bool rxtainted; |
1c23e2bd | 1721 | const U8 gimme = GIMME_V; |
a0d0e21e | 1722 | STRLEN len; |
a3b680e6 | 1723 | const I32 oldsave = PL_savestack_ix; |
e60df1fa | 1724 | I32 had_zerolen = 0; |
b1422d62 | 1725 | MAGIC *mg = NULL; |
a0d0e21e | 1726 | |
533c011a | 1727 | if (PL_op->op_flags & OPf_STACKED) |
a0d0e21e | 1728 | TARG = POPs; |
6ffceeb7 | 1729 | else if (ARGTARG) |
59f00321 | 1730 | GETTARGET; |
a0d0e21e | 1731 | else { |
54b9620d | 1732 | TARG = DEFSV; |
a0d0e21e LW |
1733 | EXTEND(SP,1); |
1734 | } | |
d9f424b2 | 1735 | |
c277df42 | 1736 | PUTBACK; /* EVAL blocks need stack_sp. */ |
69dc4b30 FC |
1737 | /* Skip get-magic if this is a qr// clone, because regcomp has |
1738 | already done it. */ | |
f1d31338 | 1739 | truebase = ReANY(rx)->mother_re |
69dc4b30 FC |
1740 | ? SvPV_nomg_const(TARG, len) |
1741 | : SvPV_const(TARG, len); | |
f1d31338 | 1742 | if (!truebase) |
2269b42e | 1743 | DIE(aTHX_ "panic: pp_match"); |
f1d31338 | 1744 | strend = truebase + len; |
284167a5 S |
1745 | rxtainted = (RX_ISTAINTED(rx) || |
1746 | (TAINT_get && (pm->op_pmflags & PMf_RETAINT))); | |
9212bbba | 1747 | TAINT_NOT; |
a0d0e21e | 1748 | |
6c864ec2 | 1749 | /* We need to know this in case we fail out early - pos() must be reset */ |
de0df3c0 MH |
1750 | global = dynpm->op_pmflags & PMf_GLOBAL; |
1751 | ||
d65afb4b | 1752 | /* PMdf_USED is set after a ?? matches once */ |
c737faaf YO |
1753 | if ( |
1754 | #ifdef USE_ITHREADS | |
1755 | SvREADONLY(PL_regex_pad[pm->op_pmoffset]) | |
1756 | #else | |
1757 | pm->op_pmflags & PMf_USED | |
1758 | #endif | |
1759 | ) { | |
e5dc5375 | 1760 | DEBUG_r(PerlIO_printf(Perl_debug_log, "?? already matched once")); |
de0df3c0 | 1761 | goto nope; |
a0d0e21e LW |
1762 | } |
1763 | ||
7e313637 FC |
1764 | /* empty pattern special-cased to use last successful pattern if |
1765 | possible, except for qr// */ | |
794826f4 YO |
1766 | if (!ReANY(rx)->mother_re && !RX_PRELEN(rx) && PL_curpm) { |
1767 | if (PL_curpm == PL_reg_curpm) | |
31775478 | 1768 | Perl_croak(aTHX_ "Use of the empty pattern inside of " |
794826f4 | 1769 | "a regex code block is forbidden"); |
3280af22 | 1770 | pm = PL_curpm; |
aaa362c4 | 1771 | rx = PM_GETRE(pm); |
a0d0e21e | 1772 | } |
d65afb4b | 1773 | |
389ecb56 | 1774 | if (RX_MINLEN(rx) >= 0 && (STRLEN)RX_MINLEN(rx) > len) { |
75d43e96 FC |
1775 | DEBUG_r(PerlIO_printf(Perl_debug_log, "String shorter than min possible regex match (%" |
1776 | UVuf" < %"IVdf")\n", | |
1777 | (UV)len, (IV)RX_MINLEN(rx))); | |
de0df3c0 | 1778 | goto nope; |
e5dc5375 | 1779 | } |
c277df42 | 1780 | |
8ef97b0e | 1781 | /* get pos() if //g */ |
de0df3c0 | 1782 | if (global) { |
b1422d62 | 1783 | mg = mg_find_mglob(TARG); |
8ef97b0e | 1784 | if (mg && mg->mg_len >= 0) { |
25fdce4a | 1785 | curpos = MgBYTEPOS(mg, TARG, truebase, len); |
8ef97b0e DM |
1786 | /* last time pos() was set, it was zero-length match */ |
1787 | if (mg->mg_flags & MGf_MINMATCH) | |
1788 | had_zerolen = 1; | |
1789 | } | |
a0d0e21e | 1790 | } |
8ef97b0e | 1791 | |
6e240d0b | 1792 | #ifdef PERL_SAWAMPERSAND |
a41aa44d | 1793 | if ( RX_NPARENS(rx) |
6502e081 | 1794 | || PL_sawampersand |
6502e081 | 1795 | || (RX_EXTFLAGS(rx) & (RXf_EVAL_SEEN|RXf_PMf_KEEPCOPY)) |
5b0e71e9 | 1796 | || (dynpm->op_pmflags & PMf_KEEPCOPY) |
6e240d0b FC |
1797 | ) |
1798 | #endif | |
1799 | { | |
6502e081 DM |
1800 | r_flags |= (REXEC_COPY_STR|REXEC_COPY_SKIP_PRE); |
1801 | /* in @a =~ /(.)/g, we iterate multiple times, but copy the buffer | |
1802 | * only on the first iteration. Therefore we need to copy $' as well | |
1803 | * as $&, to make the rest of the string available for captures in | |
1804 | * subsequent iterations */ | |
1805 | if (! (global && gimme == G_ARRAY)) | |
1806 | r_flags |= REXEC_COPY_SKIP_POST; | |
1807 | }; | |
5b0e71e9 DM |
1808 | #ifdef PERL_SAWAMPERSAND |
1809 | if (dynpm->op_pmflags & PMf_KEEPCOPY) | |
1810 | /* handle KEEPCOPY in pmop but not rx, eg $r=qr/a/; /$r/p */ | |
1811 | r_flags &= ~(REXEC_COPY_SKIP_PRE|REXEC_COPY_SKIP_POST); | |
1812 | #endif | |
22e551b9 | 1813 | |
f1d31338 DM |
1814 | s = truebase; |
1815 | ||
d7be1480 | 1816 | play_it_again: |
985afbc1 | 1817 | if (global) |
03c83e26 | 1818 | s = truebase + curpos; |
f722798b | 1819 | |
77da2310 | 1820 | if (!CALLREGEXEC(rx, (char*)s, (char *)strend, (char*)truebase, |
03c83e26 | 1821 | had_zerolen, TARG, NULL, r_flags)) |
03b6c93d | 1822 | goto nope; |
77da2310 NC |
1823 | |
1824 | PL_curpm = pm; | |
985afbc1 | 1825 | if (dynpm->op_pmflags & PMf_ONCE) |
c737faaf | 1826 | #ifdef USE_ITHREADS |
77da2310 | 1827 | SvREADONLY_on(PL_regex_pad[dynpm->op_pmoffset]); |
c737faaf | 1828 | #else |
77da2310 | 1829 | dynpm->op_pmflags |= PMf_USED; |
c737faaf | 1830 | #endif |
a0d0e21e | 1831 | |
72311751 GS |
1832 | if (rxtainted) |
1833 | RX_MATCH_TAINTED_on(rx); | |
1834 | TAINT_IF(RX_MATCH_TAINTED(rx)); | |
35c2ccc3 DM |
1835 | |
1836 | /* update pos */ | |
1837 | ||
1838 | if (global && (gimme != G_ARRAY || (dynpm->op_pmflags & PMf_CONTINUE))) { | |
b1422d62 | 1839 | if (!mg) |
35c2ccc3 | 1840 | mg = sv_magicext_mglob(TARG); |
25fdce4a | 1841 | MgBYTEPOS_set(mg, TARG, truebase, RX_OFFS(rx)[0].end); |
adf51885 DM |
1842 | if (RX_ZERO_LEN(rx)) |
1843 | mg->mg_flags |= MGf_MINMATCH; | |
1844 | else | |
1845 | mg->mg_flags &= ~MGf_MINMATCH; | |
35c2ccc3 DM |
1846 | } |
1847 | ||
bf9dff51 DM |
1848 | if ((!RX_NPARENS(rx) && !global) || gimme != G_ARRAY) { |
1849 | LEAVE_SCOPE(oldsave); | |
1850 | RETPUSHYES; | |
1851 | } | |
1852 | ||
88ab22af DM |
1853 | /* push captures on stack */ |
1854 | ||
bf9dff51 | 1855 | { |
07bc277f | 1856 | const I32 nparens = RX_NPARENS(rx); |
a3b680e6 | 1857 | I32 i = (global && !nparens) ? 1 : 0; |
a0d0e21e | 1858 | |
c277df42 | 1859 | SPAGAIN; /* EVAL blocks could move the stack. */ |
ffc61ed2 JH |
1860 | EXTEND(SP, nparens + i); |
1861 | EXTEND_MORTAL(nparens + i); | |
1862 | for (i = !i; i <= nparens; i++) { | |
a0d0e21e | 1863 | PUSHs(sv_newmortal()); |
5d9574c1 DM |
1864 | if (LIKELY((RX_OFFS(rx)[i].start != -1) |
1865 | && RX_OFFS(rx)[i].end != -1 )) | |
1866 | { | |
07bc277f | 1867 | const I32 len = RX_OFFS(rx)[i].end - RX_OFFS(rx)[i].start; |
f1d31338 | 1868 | const char * const s = RX_OFFS(rx)[i].start + truebase; |
5d9574c1 DM |
1869 | if (UNLIKELY(RX_OFFS(rx)[i].end < 0 || RX_OFFS(rx)[i].start < 0 |
1870 | || len < 0 || len > strend - s)) | |
5637ef5b NC |
1871 | DIE(aTHX_ "panic: pp_match start/end pointers, i=%ld, " |
1872 | "start=%ld, end=%ld, s=%p, strend=%p, len=%"UVuf, | |
1873 | (long) i, (long) RX_OFFS(rx)[i].start, | |
1874 | (long)RX_OFFS(rx)[i].end, s, strend, (UV) len); | |
a0d0e21e | 1875 | sv_setpvn(*SP, s, len); |
cce850e4 | 1876 | if (DO_UTF8(TARG) && is_utf8_string((U8*)s, len)) |
a197cbdd | 1877 | SvUTF8_on(*SP); |
a0d0e21e LW |
1878 | } |
1879 | } | |
1880 | if (global) { | |
0e0b3e82 | 1881 | curpos = (UV)RX_OFFS(rx)[0].end; |
03c83e26 | 1882 | had_zerolen = RX_ZERO_LEN(rx); |
c277df42 | 1883 | PUTBACK; /* EVAL blocks may use stack */ |
cf93c79d | 1884 | r_flags |= REXEC_IGNOREPOS | REXEC_NOT_FIRST; |
a0d0e21e LW |
1885 | goto play_it_again; |
1886 | } | |
4633a7c4 | 1887 | LEAVE_SCOPE(oldsave); |
a0d0e21e LW |
1888 | RETURN; |
1889 | } | |
e5964223 | 1890 | NOT_REACHED; /* NOTREACHED */ |
a0d0e21e | 1891 | |
7b52d656 | 1892 | nope: |
d65afb4b | 1893 | if (global && !(dynpm->op_pmflags & PMf_CONTINUE)) { |
b1422d62 DM |
1894 | if (!mg) |
1895 | mg = mg_find_mglob(TARG); | |
1896 | if (mg) | |
1897 | mg->mg_len = -1; | |
a0d0e21e | 1898 | } |
4633a7c4 | 1899 | LEAVE_SCOPE(oldsave); |
a0d0e21e LW |
1900 | if (gimme == G_ARRAY) |
1901 | RETURN; | |
1902 | RETPUSHNO; | |
1903 | } | |
1904 | ||
1905 | OP * | |
864dbfa3 | 1906 | Perl_do_readline(pTHX) |
a0d0e21e | 1907 | { |
20b7effb | 1908 | dSP; dTARGETSTACKED; |
eb578fdb | 1909 | SV *sv; |
a0d0e21e LW |
1910 | STRLEN tmplen = 0; |
1911 | STRLEN offset; | |
760ac839 | 1912 | PerlIO *fp; |
eb578fdb KW |
1913 | IO * const io = GvIO(PL_last_in_gv); |
1914 | const I32 type = PL_op->op_type; | |
1c23e2bd | 1915 | const U8 gimme = GIMME_V; |
a0d0e21e | 1916 | |
6136c704 | 1917 | if (io) { |
50db69d8 | 1918 | const MAGIC *const mg = SvTIED_mg((const SV *)io, PERL_MAGIC_tiedscalar); |
6136c704 | 1919 | if (mg) { |
3e0cb5de | 1920 | Perl_tied_method(aTHX_ SV_CONST(READLINE), SP, MUTABLE_SV(io), mg, gimme, 0); |
6136c704 | 1921 | if (gimme == G_SCALAR) { |
50db69d8 NC |
1922 | SPAGAIN; |
1923 | SvSetSV_nosteal(TARG, TOPs); | |
1924 | SETTARG; | |
6136c704 | 1925 | } |
50db69d8 | 1926 | return NORMAL; |
0b7c7b4f | 1927 | } |
e79b0511 | 1928 | } |
4608196e | 1929 | fp = NULL; |
a0d0e21e LW |
1930 | if (io) { |
1931 | fp = IoIFP(io); | |
1932 | if (!fp) { | |
1933 | if (IoFLAGS(io) & IOf_ARGV) { | |
1934 | if (IoFLAGS(io) & IOf_START) { | |
a0d0e21e | 1935 | IoLINES(io) = 0; |
b9f2b683 | 1936 | if (av_tindex(GvAVn(PL_last_in_gv)) < 0) { |
1d7c1841 | 1937 | IoFLAGS(io) &= ~IOf_START; |
d5eb9a46 | 1938 | do_open6(PL_last_in_gv, "-", 1, NULL, NULL, 0); |
4bac9ae4 | 1939 | SvTAINTED_off(GvSVn(PL_last_in_gv)); /* previous tainting irrelevant */ |
76f68e9b | 1940 | sv_setpvs(GvSVn(PL_last_in_gv), "-"); |
3280af22 | 1941 | SvSETMAGIC(GvSV(PL_last_in_gv)); |
a2008d6d GS |
1942 | fp = IoIFP(io); |
1943 | goto have_fp; | |
a0d0e21e LW |
1944 | } |
1945 | } | |
157fb5a1 | 1946 | fp = nextargv(PL_last_in_gv, PL_op->op_flags & OPf_SPECIAL); |
a0d0e21e | 1947 | if (!fp) { /* Note: fp != IoIFP(io) */ |
3280af22 | 1948 | (void)do_close(PL_last_in_gv, FALSE); /* now it does*/ |
a0d0e21e LW |
1949 | } |
1950 | } | |
0d44d22b NC |
1951 | else if (type == OP_GLOB) |
1952 | fp = Perl_start_glob(aTHX_ POPs, io); | |
a0d0e21e LW |
1953 | } |
1954 | else if (type == OP_GLOB) | |
1955 | SP--; | |
7716c5c5 | 1956 | else if (IoTYPE(io) == IoTYPE_WRONLY) { |
a5390457 | 1957 | report_wrongway_fh(PL_last_in_gv, '>'); |
a00b5bd3 | 1958 | } |
a0d0e21e LW |
1959 | } |
1960 | if (!fp) { | |
041457d9 | 1961 | if ((!io || !(IoFLAGS(io) & IOf_START)) |
de7dabb6 TC |
1962 | && ckWARN(WARN_CLOSED) |
1963 | && type != OP_GLOB) | |
041457d9 | 1964 | { |
de7dabb6 | 1965 | report_evil_fh(PL_last_in_gv); |
3f4520fe | 1966 | } |
54310121 | 1967 | if (gimme == G_SCALAR) { |
79628082 | 1968 | /* undef TARG, and push that undefined value */ |
ba92458f | 1969 | if (type != OP_RCATLINE) { |
aab1202a | 1970 | sv_setsv(TARG,NULL); |
ba92458f | 1971 | } |
a0d0e21e LW |
1972 | PUSHTARG; |
1973 | } | |
1974 | RETURN; | |
1975 | } | |
a2008d6d | 1976 | have_fp: |
54310121 | 1977 | if (gimme == G_SCALAR) { |
a0d0e21e | 1978 | sv = TARG; |
0f722b55 RGS |
1979 | if (type == OP_RCATLINE && SvGMAGICAL(sv)) |
1980 | mg_get(sv); | |
48de12d9 RGS |
1981 | if (SvROK(sv)) { |
1982 | if (type == OP_RCATLINE) | |
5668452f | 1983 | SvPV_force_nomg_nolen(sv); |
48de12d9 RGS |
1984 | else |
1985 | sv_unref(sv); | |
1986 | } | |
f7877b28 | 1987 | else if (isGV_with_GP(sv)) { |
5668452f | 1988 | SvPV_force_nomg_nolen(sv); |
f7877b28 | 1989 | } |
862a34c6 | 1990 | SvUPGRADE(sv, SVt_PV); |
a0d0e21e | 1991 | tmplen = SvLEN(sv); /* remember if already alloced */ |
e3918bb7 | 1992 | if (!tmplen && !SvREADONLY(sv) && !SvIsCOW(sv)) { |
f72e8700 JJ |
1993 | /* try short-buffering it. Please update t/op/readline.t |
1994 | * if you change the growth length. | |
1995 | */ | |
1996 | Sv_Grow(sv, 80); | |
1997 | } | |
2b5e58c4 AMS |
1998 | offset = 0; |
1999 | if (type == OP_RCATLINE && SvOK(sv)) { | |
2000 | if (!SvPOK(sv)) { | |
5668452f | 2001 | SvPV_force_nomg_nolen(sv); |
2b5e58c4 | 2002 | } |
a0d0e21e | 2003 | offset = SvCUR(sv); |
2b5e58c4 | 2004 | } |
a0d0e21e | 2005 | } |
54310121 | 2006 | else { |
561b68a9 | 2007 | sv = sv_2mortal(newSV(80)); |
54310121 | 2008 | offset = 0; |
2009 | } | |
fbad3eb5 | 2010 | |
3887d568 AP |
2011 | /* This should not be marked tainted if the fp is marked clean */ |
2012 | #define MAYBE_TAINT_LINE(io, sv) \ | |
2013 | if (!(IoFLAGS(io) & IOf_UNTAINT)) { \ | |
2014 | TAINT; \ | |
2015 | SvTAINTED_on(sv); \ | |
2016 | } | |
2017 | ||
684bef36 | 2018 | /* delay EOF state for a snarfed empty file */ |
fbad3eb5 | 2019 | #define SNARF_EOF(gimme,rs,io,sv) \ |
684bef36 | 2020 | (gimme != G_SCALAR || SvCUR(sv) \ |
b9fee9ba | 2021 | || (IoFLAGS(io) & IOf_NOLINE) || !RsSNARF(rs)) |
fbad3eb5 | 2022 | |
a0d0e21e | 2023 | for (;;) { |
09e8efcc | 2024 | PUTBACK; |
fbad3eb5 | 2025 | if (!sv_gets(sv, fp, offset) |
2d726892 TF |
2026 | && (type == OP_GLOB |
2027 | || SNARF_EOF(gimme, PL_rs, io, sv) | |
2028 | || PerlIO_error(fp))) | |
fbad3eb5 | 2029 | { |
760ac839 | 2030 | PerlIO_clearerr(fp); |
a0d0e21e | 2031 | if (IoFLAGS(io) & IOf_ARGV) { |
157fb5a1 | 2032 | fp = nextargv(PL_last_in_gv, PL_op->op_flags & OPf_SPECIAL); |
a0d0e21e LW |
2033 | if (fp) |
2034 | continue; | |
3280af22 | 2035 | (void)do_close(PL_last_in_gv, FALSE); |
a0d0e21e LW |
2036 | } |
2037 | else if (type == OP_GLOB) { | |
a2a5de95 NC |
2038 | if (!do_close(PL_last_in_gv, FALSE)) { |
2039 | Perl_ck_warner(aTHX_ packWARN(WARN_GLOB), | |
2040 | "glob failed (child exited with status %d%s)", | |
2041 | (int)(STATUS_CURRENT >> 8), | |
2042 | (STATUS_CURRENT & 0x80) ? ", core dumped" : ""); | |
4eb79ab5 | 2043 | } |
a0d0e21e | 2044 | } |
54310121 | 2045 | if (gimme == G_SCALAR) { |
ba92458f AE |
2046 | if (type != OP_RCATLINE) { |
2047 | SV_CHECK_THINKFIRST_COW_DROP(TARG); | |
0c34ef67 | 2048 | SvOK_off(TARG); |
ba92458f | 2049 | } |
09e8efcc | 2050 | SPAGAIN; |
a0d0e21e LW |
2051 | PUSHTARG; |
2052 | } | |
3887d568 | 2053 | MAYBE_TAINT_LINE(io, sv); |
a0d0e21e LW |
2054 | RETURN; |
2055 | } | |
3887d568 | 2056 | MAYBE_TAINT_LINE(io, sv); |
a0d0e21e | 2057 | IoLINES(io)++; |
b9fee9ba | 2058 | IoFLAGS(io) |= IOf_NOLINE; |
71be2cbc | 2059 | SvSETMAGIC(sv); |
09e8efcc | 2060 | SPAGAIN; |
a0d0e21e | 2061 | XPUSHs(sv); |
a0d0e21e | 2062 | if (type == OP_GLOB) { |
349d4f2f | 2063 | const char *t1; |
45a23732 | 2064 | Stat_t statbuf; |
a0d0e21e | 2065 | |
3280af22 | 2066 | if (SvCUR(sv) > 0 && SvCUR(PL_rs) > 0) { |
6136c704 | 2067 | char * const tmps = SvEND(sv) - 1; |
aa07b2f6 | 2068 | if (*tmps == *SvPVX_const(PL_rs)) { |
c07a80fd | 2069 | *tmps = '\0'; |
b162af07 | 2070 | SvCUR_set(sv, SvCUR(sv) - 1); |
c07a80fd | 2071 | } |
2072 | } | |
349d4f2f | 2073 | for (t1 = SvPVX_const(sv); *t1; t1++) |
b51c3e77 CB |
2074 | #ifdef __VMS |
2075 | if (strchr("*%?", *t1)) | |
2076 | #else | |
7ad1e72d | 2077 | if (strchr("$&*(){}[]'\";\\|?<>~`", *t1)) |
b51c3e77 | 2078 | #endif |
a0d0e21e | 2079 | break; |
45a23732 | 2080 | if (*t1 && PerlLIO_lstat(SvPVX_const(sv), &statbuf) < 0) { |
a0d0e21e LW |
2081 | (void)POPs; /* Unmatched wildcard? Chuck it... */ |
2082 | continue; | |
2083 | } | |
2d79bf7f | 2084 | } else if (SvUTF8(sv)) { /* OP_READLINE, OP_RCATLINE */ |
d4c19fe8 AL |
2085 | if (ckWARN(WARN_UTF8)) { |
2086 | const U8 * const s = (const U8*)SvPVX_const(sv) + offset; | |
2087 | const STRLEN len = SvCUR(sv) - offset; | |
2088 | const U8 *f; | |
2089 | ||
2090 | if (!is_utf8_string_loc(s, len, &f)) | |
2091 | /* Emulate :encoding(utf8) warning in the same case. */ | |
2092 | Perl_warner(aTHX_ packWARN(WARN_UTF8), | |
2093 | "utf8 \"\\x%02X\" does not map to Unicode", | |
2094 | f < (U8*)SvEND(sv) ? *f : 0); | |
2095 | } | |
a0d0e21e | 2096 | } |
54310121 | 2097 | if (gimme == G_ARRAY) { |
a0d0e21e | 2098 | if (SvLEN(sv) - SvCUR(sv) > 20) { |
1da4ca5f | 2099 | SvPV_shrink_to_cur(sv); |
a0d0e21e | 2100 | } |
561b68a9 | 2101 | sv = sv_2mortal(newSV(80)); |
a0d0e21e LW |
2102 | continue; |
2103 | } | |
54310121 | 2104 | else if (gimme == G_SCALAR && !tmplen && SvLEN(sv) - SvCUR(sv) > 80) { |
a0d0e21e | 2105 | /* try to reclaim a bit of scalar space (only on 1st alloc) */ |
d5b5861b NC |
2106 | const STRLEN new_len |
2107 | = SvCUR(sv) < 60 ? 80 : SvCUR(sv)+40; /* allow some slop */ | |
1da4ca5f | 2108 | SvPV_renew(sv, new_len); |
a0d0e21e LW |
2109 | } |
2110 | RETURN; | |
2111 | } | |
2112 | } | |
2113 | ||
a0d0e21e LW |
2114 | PP(pp_helem) |
2115 | { | |
20b7effb | 2116 | dSP; |
760ac839 | 2117 | HE* he; |
ae77835f | 2118 | SV **svp; |
c445ea15 | 2119 | SV * const keysv = POPs; |
85fbaab2 | 2120 | HV * const hv = MUTABLE_HV(POPs); |
a3b680e6 AL |
2121 | const U32 lval = PL_op->op_flags & OPf_MOD || LVRET; |
2122 | const U32 defer = PL_op->op_private & OPpLVAL_DEFER; | |
be6c24e0 | 2123 | SV *sv; |
92970b93 | 2124 | const bool localizing = PL_op->op_private & OPpLVAL_INTRO; |
d30e492c | 2125 | bool preeminent = TRUE; |
a0d0e21e | 2126 | |
6dfc73ea S |
2127 | if (SvTYPE(hv) != SVt_PVHV) |
2128 | RETPUSHUNDEF; | |
d4c19fe8 | 2129 | |
92970b93 | 2130 | if (localizing) { |
d4c19fe8 AL |
2131 | MAGIC *mg; |
2132 | HV *stash; | |
d30e492c VP |
2133 | |
2134 | /* If we can determine whether the element exist, | |
2135 | * Try to preserve the existenceness of a tied hash | |
2136 | * element by using EXISTS and DELETE if possible. | |
2137 | * Fallback to FETCH and STORE otherwise. */ | |
2c5f48c2 | 2138 | if (SvCANEXISTDELETE(hv)) |
d30e492c | 2139 | preeminent = hv_exists_ent(hv, keysv, 0); |
d4c19fe8 | 2140 | } |
d30e492c | 2141 | |
5f9d7e2b | 2142 | he = hv_fetch_ent(hv, keysv, lval && !defer, 0); |
d4c19fe8 | 2143 | svp = he ? &HeVAL(he) : NULL; |
a0d0e21e | 2144 | if (lval) { |
746f6409 | 2145 | if (!svp || !*svp || *svp == &PL_sv_undef) { |
68dc0745 | 2146 | SV* lv; |
2147 | SV* key2; | |
2d8e6c8d | 2148 | if (!defer) { |
be2597df | 2149 | DIE(aTHX_ PL_no_helem_sv, SVfARG(keysv)); |
2d8e6c8d | 2150 | } |
68dc0745 | 2151 | lv = sv_newmortal(); |
2152 | sv_upgrade(lv, SVt_PVLV); | |
2153 | LvTYPE(lv) = 'y'; | |
6136c704 | 2154 | sv_magic(lv, key2 = newSVsv(keysv), PERL_MAGIC_defelem, NULL, 0); |
fc2b2dca | 2155 | SvREFCNT_dec_NN(key2); /* sv_magic() increments refcount */ |
0ad694a7 | 2156 | LvTARG(lv) = SvREFCNT_inc_simple_NN(hv); |
68dc0745 | 2157 | LvTARGLEN(lv) = 1; |
2158 | PUSHs(lv); | |
2159 | RETURN; | |
2160 | } | |
92970b93 | 2161 | if (localizing) { |
bfcb3514 | 2162 | if (HvNAME_get(hv) && isGV(*svp)) |
159b6efe | 2163 | save_gp(MUTABLE_GV(*svp), !(PL_op->op_flags & OPf_SPECIAL)); |
47cfc530 VP |
2164 | else if (preeminent) |
2165 | save_helem_flags(hv, keysv, svp, | |
2166 | (PL_op->op_flags & OPf_SPECIAL) ? 0 : SAVEf_SETMAGIC); | |
2167 | else | |
2168 | SAVEHDELETE(hv, keysv); | |
5f05dabc | 2169 | } |
9026059d GG |
2170 | else if (PL_op->op_private & OPpDEREF) { |
2171 | PUSHs(vivify_ref(*svp, PL_op->op_private & OPpDEREF)); | |
2172 | RETURN; | |
2173 | } | |
a0d0e21e | 2174 | } |
746f6409 | 2175 | sv = (svp && *svp ? *svp : &PL_sv_undef); |
fd69380d DM |
2176 | /* Originally this did a conditional C<sv = sv_mortalcopy(sv)>; this |
2177 | * was to make C<local $tied{foo} = $tied{foo}> possible. | |
2178 | * However, it seems no longer to be needed for that purpose, and | |
2179 | * introduced a new bug: stuff like C<while ($hash{taintedval} =~ /.../g> | |
2180 | * would loop endlessly since the pos magic is getting set on the | |
2181 | * mortal copy and lost. However, the copy has the effect of | |
2182 | * triggering the get magic, and losing it altogether made things like | |
2183 | * c<$tied{foo};> in void context no longer do get magic, which some | |
2184 | * code relied on. Also, delayed triggering of magic on @+ and friends | |
2185 | * meant the original regex may be out of scope by now. So as a | |
2186 | * compromise, do the get magic here. (The MGf_GSKIP flag will stop it | |
2187 | * being called too many times). */ | |
39cf747a | 2188 | if (!lval && SvRMAGICAL(hv) && SvGMAGICAL(sv)) |
fd69380d | 2189 | mg_get(sv); |
be6c24e0 | 2190 | PUSHs(sv); |
a0d0e21e LW |
2191 | RETURN; |
2192 | } | |
2193 | ||
fedf30e1 DM |
2194 | |
2195 | /* a stripped-down version of Perl_softref2xv() for use by | |
2196 | * pp_multideref(), which doesn't use PL_op->op_flags */ | |
2197 | ||
f9db5646 | 2198 | STATIC GV * |
fedf30e1 DM |
2199 | S_softref2xv_lite(pTHX_ SV *const sv, const char *const what, |
2200 | const svtype type) | |
2201 | { | |
2202 | if (PL_op->op_private & HINT_STRICT_REFS) { | |
2203 | if (SvOK(sv)) | |
2204 | Perl_die(aTHX_ PL_no_symref_sv, sv, | |
2205 | (SvPOKp(sv) && SvCUR(sv)>32 ? "..." : ""), what); | |
2206 | else | |
2207 | Perl_die(aTHX_ PL_no_usym, what); | |
2208 | } | |
2209 | if (!SvOK(sv)) | |
2210 | Perl_die(aTHX_ PL_no_usym, what); | |
2211 | return gv_fetchsv_nomg(sv, GV_ADD, type); | |
2212 | } | |
2213 | ||
2214 | ||
79815f56 DM |
2215 | /* Handle one or more aggregate derefs and array/hash indexings, e.g. |
2216 | * $h->{foo} or $a[0]{$key}[$i] or f()->[1] | |
fedf30e1 DM |
2217 | * |
2218 | * op_aux points to an array of unions of UV / IV / SV* / PADOFFSET. | |
79815f56 DM |
2219 | * Each of these either contains a set of actions, or an argument, such as |
2220 | * an IV to use as an array index, or a lexical var to retrieve. | |
2221 | * Several actions re stored per UV; we keep shifting new actions off the | |
2222 | * one UV, and only reload when it becomes zero. | |
fedf30e1 DM |
2223 | */ |
2224 | ||
2225 | PP(pp_multideref) | |
2226 | { | |
2227 | SV *sv = NULL; /* init to avoid spurious 'may be used uninitialized' */ | |
2228 | UNOP_AUX_item *items = cUNOP_AUXx(PL_op)->op_aux; | |
2229 | UV actions = items->uv; | |
2230 | ||
2231 | assert(actions); | |
2232 | /* this tells find_uninit_var() where we're up to */ | |
2233 | PL_multideref_pc = items; | |
2234 | ||
2235 | while (1) { | |
2236 | /* there are three main classes of action; the first retrieve | |
2237 | * the initial AV or HV from a variable or the stack; the second | |
2238 | * does the equivalent of an unrolled (/DREFAV, rv2av, aelem), | |
2239 | * the third an unrolled (/DREFHV, rv2hv, helem). | |
2240 | */ | |
2241 | switch (actions & MDEREF_ACTION_MASK) { | |
2242 | ||
2243 | case MDEREF_reload: | |
2244 | actions = (++items)->uv; | |
2245 | continue; | |
2246 | ||
2247 | case MDEREF_AV_padav_aelem: /* $lex[...] */ | |
2248 | sv = PAD_SVl((++items)->pad_offset); | |
2249 | goto do_AV_aelem; | |
2250 | ||
2251 | case MDEREF_AV_gvav_aelem: /* $pkg[...] */ | |
2252 | sv = UNOP_AUX_item_sv(++items); | |
2253 | assert(isGV_with_GP(sv)); | |
2254 | sv = (SV*)GvAVn((GV*)sv); | |
2255 | goto do_AV_aelem; | |
2256 | ||
2257 | case MDEREF_AV_pop_rv2av_aelem: /* expr->[...] */ | |
2258 | { | |
2259 | dSP; | |
2260 | sv = POPs; | |
2261 | PUTBACK; | |
2262 | goto do_AV_rv2av_aelem; | |
2263 | } | |
2264 | ||
2265 | case MDEREF_AV_gvsv_vivify_rv2av_aelem: /* $pkg->[...] */ | |
2266 | sv = UNOP_AUX_item_sv(++items); | |
2267 | assert(isGV_with_GP(sv)); | |
2268 | sv = GvSVn((GV*)sv); | |
2269 | goto do_AV_vivify_rv2av_aelem; | |
2270 | ||
2271 | case MDEREF_AV_padsv_vivify_rv2av_aelem: /* $lex->[...] */ | |
2272 | sv = PAD_SVl((++items)->pad_offset); | |
2273 | /* FALLTHROUGH */ | |
2274 | ||
2275 | do_AV_vivify_rv2av_aelem: | |
2276 | case MDEREF_AV_vivify_rv2av_aelem: /* vivify, ->[...] */ | |
2277 | /* this is the OPpDEREF action normally found at the end of | |
2278 | * ops like aelem, helem, rv2sv */ | |
2279 | sv = vivify_ref(sv, OPpDEREF_AV); | |
2280 | /* FALLTHROUGH */ | |
2281 | ||
2282 | do_AV_rv2av_aelem: | |
2283 | /* this is basically a copy of pp_rv2av when it just has the | |
2284 | * sKR/1 flags */ | |
2285 | SvGETMAGIC(sv); | |
2286 | if (LIKELY(SvROK(sv))) { | |
2287 | if (UNLIKELY(SvAMAGIC(sv))) { | |
2288 | sv = amagic_deref_call(sv, to_av_amg); | |
2289 | } | |
2290 | sv = SvRV(sv); | |
2291 | if (UNLIKELY(SvTYPE(sv) != SVt_PVAV)) | |
2292 | DIE(aTHX_ "Not an ARRAY reference"); | |
2293 | } | |
2294 | else if (SvTYPE(sv) != SVt_PVAV) { | |
2295 | if (!isGV_with_GP(sv)) | |
2296 | sv = (SV*)S_softref2xv_lite(aTHX_ sv, "an ARRAY", SVt_PVAV); | |
2297 | sv = MUTABLE_SV(GvAVn((GV*)sv)); | |
2298 | } | |
2299 | /* FALLTHROUGH */ | |
2300 | ||
2301 | do_AV_aelem: | |
2302 | { | |
2303 | /* retrieve the key; this may be either a lexical or package | |
2304 | * var (whose index/ptr is stored as an item) or a signed | |
2305 | * integer constant stored as an item. | |
2306 | */ | |
2307 | SV *elemsv; | |
2308 | IV elem = 0; /* to shut up stupid compiler warnings */ | |
2309 | ||
2310 | ||
2311 | assert(SvTYPE(sv) == SVt_PVAV); | |
2312 | ||
2313 | switch (actions & MDEREF_INDEX_MASK) { | |
2314 | case MDEREF_INDEX_none: | |
2315 | goto finish; | |
2316 | case MDEREF_INDEX_const: | |
2317 | elem = (++items)->iv; | |
2318 | break; | |
2319 | case MDEREF_INDEX_padsv: | |
2320 | elemsv = PAD_SVl((++items)->pad_offset); | |
2321 | goto check_elem; | |
2322 | case MDEREF_INDEX_gvsv: | |
2323 | elemsv = UNOP_AUX_item_sv(++items); | |
2324 | assert(isGV_with_GP(elemsv)); | |
2325 | elemsv = GvSVn((GV*)elemsv); | |
2326 | check_elem: | |
2327 | if (UNLIKELY(SvROK(elemsv) && !SvGAMAGIC(elemsv) | |
2328 | && ckWARN(WARN_MISC))) | |
2329 | Perl_warner(aTHX_ packWARN(WARN_MISC), | |
2330 | "Use of reference \"%"SVf"\" as array index", | |
2331 | SVfARG(elemsv)); | |
2332 | /* the only time that S_find_uninit_var() needs this | |
2333 | * is to determine which index value triggered the | |
2334 | * undef warning. So just update it here. Note that | |
2335 | * since we don't save and restore this var (e.g. for | |
2336 | * tie or overload execution), its value will be | |
2337 | * meaningless apart from just here */ | |
2338 | PL_multideref_pc = items; | |
2339 | elem = SvIV(elemsv); | |
2340 | break; | |
2341 | } | |
2342 | ||
2343 | ||
2344 | /* this is basically a copy of pp_aelem with OPpDEREF skipped */ | |
2345 | ||
2346 | if (!(actions & MDEREF_FLAG_last)) { | |
2347 | SV** svp = av_fetch((AV*)sv, elem, 1); | |
2348 | if (!svp || ! (sv=*svp)) | |
2349 | DIE(aTHX_ PL_no_aelem, elem); | |
2350 | break; | |
2351 | } | |
2352 | ||
2353 | if (PL_op->op_private & | |
2354 | (OPpMULTIDEREF_EXISTS|OPpMULTIDEREF_DELETE)) | |
2355 | { | |
2356 | if (PL_op->op_private & OPpMULTIDEREF_EXISTS) { | |
2357 | sv = av_exists((AV*)sv, elem) ? &PL_sv_yes : &PL_sv_no; | |
2358 | } | |
2359 | else { | |
2360 | I32 discard = (GIMME_V == G_VOID) ? G_DISCARD : 0; | |
2361 | sv = av_delete((AV*)sv, elem, discard); | |
2362 | if (discard) | |
2363 | return NORMAL; | |
2364 | if (!sv) | |
2365 | sv = &PL_sv_undef; | |
2366 | } | |
2367 | } | |
2368 | else { | |
2369 | const U32 lval = PL_op->op_flags & OPf_MOD || LVRET; | |
2370 | const U32 defer = PL_op->op_private & OPpLVAL_DEFER; | |
2371 | const bool localizing = PL_op->op_private & OPpLVAL_INTRO; | |
2372 | bool preeminent = TRUE; | |
2373 | AV *const av = (AV*)sv; | |
2374 | SV** svp; | |
2375 | ||
2376 | if (UNLIKELY(localizing)) { | |
2377 | MAGIC *mg; | |
2378 | HV *stash; | |
2379 | ||
2380 | /* If we can determine whether the element exist, | |
2381 | * Try to preserve the existenceness of a tied array | |
2382 | * element by using EXISTS and DELETE if possible. | |
2383 | * Fallback to FETCH and STORE otherwise. */ | |
2384 | if (SvCANEXISTDELETE(av)) | |
2385 | preeminent = av_exists(av, elem); | |
2386 | } | |
2387 | ||
2388 | svp = av_fetch(av, elem, lval && !defer); | |
2389 | ||
2390 | if (lval) { | |
2391 | if (!svp || !(sv = *svp)) { | |
2392 | IV len; | |
2393 | if (!defer) | |
2394 | DIE(aTHX_ PL_no_aelem, elem); | |
2395 | len = av_tindex(av); | |
2396 | sv = sv_2mortal(newSVavdefelem(av, | |
2397 | /* Resolve a negative index now, unless it points | |
2398 | * before the beginning of the array, in which | |
2399 | * case record it for error reporting in | |
2400 | * magic_setdefelem. */ | |
2401 | elem < 0 && len + elem >= 0 | |
2402 | ? len + elem : elem, 1)); | |
2403 | } | |
2404 | else { | |
2405 | if (UNLIKELY(localizing)) { | |
2406 | if (preeminent) { | |
2407 | save_aelem(av, elem, svp); | |
2408 | sv = *svp; /* may have changed */ | |
2409 | } | |
2410 | else | |
2411 | SAVEADELETE(av, elem); | |
2412 | } | |
2413 | } | |
2414 | } | |
2415 | else { | |
2416 | sv = (svp ? *svp : &PL_sv_undef); | |
2417 | /* see note in pp_helem() */ | |
2418 | if (SvRMAGICAL(av) && SvGMAGICAL(sv)) | |
2419 | mg_get(sv); | |
2420 | } | |
2421 | } | |
2422 | ||
2423 | } | |
2424 | finish: | |
2425 | { | |
2426 | dSP; | |
2427 | XPUSHs(sv); | |
2428 | RETURN; | |
2429 | } | |
2430 | /* NOTREACHED */ | |
2431 | ||
2432 | ||
2433 | ||
2434 | ||
2435 | case MDEREF_HV_padhv_helem: /* $lex{...} */ | |
2436 | sv = PAD_SVl((++items)->pad_offset); | |
2437 | goto do_HV_helem; | |
2438 | ||
2439 | case MDEREF_HV_gvhv_helem: /* $pkg{...} */ | |
2440 | sv = UNOP_AUX_item_sv(++items); | |
2441 | assert(isGV_with_GP(sv)); | |
2442 | sv = (SV*)GvHVn((GV*)sv); | |
2443 | goto do_HV_helem; | |
2444 | ||
2445 | case MDEREF_HV_pop_rv2hv_helem: /* expr->{...} */ | |
2446 | { | |
2447 | dSP; | |
2448 | sv = POPs; | |
2449 | PUTBACK; | |
2450 | goto do_HV_rv2hv_helem; | |
2451 | } | |
2452 | ||
2453 | case MDEREF_HV_gvsv_vivify_rv2hv_helem: /* $pkg->{...} */ | |
2454 | sv = UNOP_AUX_item_sv(++items); | |
2455 | assert(isGV_with_GP(sv)); | |
2456 | sv = GvSVn((GV*)sv); | |
2457 | goto do_HV_vivify_rv2hv_helem; | |
2458 | ||
2459 | case MDEREF_HV_padsv_vivify_rv2hv_helem: /* $lex->{...} */ | |
2460 | sv = PAD_SVl((++items)->pad_offset); | |
2461 | /* FALLTHROUGH */ | |
2462 | ||
2463 | do_HV_vivify_rv2hv_helem: | |
2464 | case MDEREF_HV_vivify_rv2hv_helem: /* vivify, ->{...} */ | |
2465 | /* this is the OPpDEREF action normally found at the end of | |
2466 | * ops like aelem, helem, rv2sv */ | |
2467 | sv = vivify_ref(sv, OPpDEREF_HV); | |
2468 | /* FALLTHROUGH */ | |
2469 | ||
2470 | do_HV_rv2hv_helem: | |
2471 | /* this is basically a copy of pp_rv2hv when it just has the | |
2472 | * sKR/1 flags (and pp_rv2hv is aliased to pp_rv2av) */ | |
2473 | ||
2474 | SvGETMAGIC(sv); | |
2475 | if (LIKELY(SvROK(sv))) { | |
2476 | if (UNLIKELY(SvAMAGIC(sv))) { | |
2477 | sv = amagic_deref_call(sv, to_hv_amg); | |
2478 | } | |
2479 | sv = SvRV(sv); | |
2480 | if (UNLIKELY(SvTYPE(sv) != SVt_PVHV)) | |
2481 | DIE(aTHX_ "Not a HASH reference"); | |
2482 | } | |
2483 | else if (SvTYPE(sv) != SVt_PVHV) { | |
2484 | if (!isGV_with_GP(sv)) | |
2485 | sv = (SV*)S_softref2xv_lite(aTHX_ sv, "a HASH", SVt_PVHV); | |
2486 | sv = MUTABLE_SV(GvHVn((GV*)sv)); | |
2487 | } | |
2488 | /* FALLTHROUGH */ | |
2489 | ||
2490 | do_HV_helem: | |
2491 | { | |
2492 | /* retrieve the key; this may be either a lexical / package | |
2493 | * var or a string constant, whose index/ptr is stored as an | |
2494 | * item | |
2495 | */ | |
2496 | SV *keysv = NULL; /* to shut up stupid compiler warnings */ | |
2497 | ||
2498 | assert(SvTYPE(sv) == SVt_PVHV); | |
2499 | ||
2500 | switch (actions & MDEREF_INDEX_MASK) { | |
2501 | case MDEREF_INDEX_none: | |
2502 | goto finish; | |
2503 | ||
2504 | case MDEREF_INDEX_const: | |
2505 | keysv = UNOP_AUX_item_sv(++items); | |
2506 | break; | |
2507 | ||
2508 | case MDEREF_INDEX_padsv: | |
2509 | keysv = PAD_SVl((++items)->pad_offset); | |
2510 | break; | |
2511 | ||
2512 | case MDEREF_INDEX_gvsv: | |
2513 | keysv = UNOP_AUX_item_sv(++items); | |
2514 | keysv = GvSVn((GV*)keysv); | |
2515 | break; | |
2516 | } | |
2517 | ||
2518 | /* see comment above about setting this var */ | |
2519 | PL_multideref_pc = items; | |
2520 | ||
2521 | ||
2522 | /* ensure that candidate CONSTs have been HEKified */ | |
2523 | assert( ((actions & MDEREF_INDEX_MASK) != MDEREF_INDEX_const) | |
2524 | || SvTYPE(keysv) >= SVt_PVMG | |
2525 | || !SvOK(keysv) | |
2526 | || SvROK(keysv) | |
2527 | || SvIsCOW_shared_hash(keysv)); | |
2528 | ||
2529 | /* this is basically a copy of pp_helem with OPpDEREF skipped */ | |
2530 | ||
2531 | if (!(actions & MDEREF_FLAG_last)) { | |
2532 | HE *he = hv_fetch_ent((HV*)sv, keysv, 1, 0); | |
2533 | if (!he || !(sv=HeVAL(he)) || sv == &PL_sv_undef) | |
2534 | DIE(aTHX_ PL_no_helem_sv, SVfARG(keysv)); | |
2535 | break; | |
2536 | } | |
2537 | ||
2538 | if (PL_op->op_private & | |
2539 | (OPpMULTIDEREF_EXISTS|OPpMULTIDEREF_DELETE)) | |
2540 | { | |
2541 | if (PL_op->op_private & OPpMULTIDEREF_EXISTS) { | |
2542 | sv = hv_exists_ent((HV*)sv, keysv, 0) | |
2543 | ? &PL_sv_yes : &PL_sv_no; | |
2544 | } | |
2545 | else { | |
2546 | I32 discard = (GIMME_V == G_VOID) ? G_DISCARD : 0; | |
2547 | sv = hv_delete_ent((HV*)sv, keysv, discard, 0); | |
2548 | if (discard) | |
2549 | return NORMAL; | |
2550 | if (!sv) | |
2551 | sv = &PL_sv_undef; | |
2552 | } | |
2553 | } | |
2554 | else { | |
2555 | const U32 lval = PL_op->op_flags & OPf_MOD || LVRET; | |
2556 | const U32 defer = PL_op->op_private & OPpLVAL_DEFER; | |
2557 | const bool localizing = PL_op->op_private & OPpLVAL_INTRO; | |
2558 | bool preeminent = TRUE; | |
2559 | SV **svp; | |
2560 | HV * const hv = (HV*)sv; | |
2561 | HE* he; | |
2562 | ||
2563 | if (UNLIKELY(localizing)) { | |
2564 | MAGIC *mg; | |
2565 | HV *stash; | |
2566 | ||
2567 | /* If we can determine whether the element exist, | |
2568 | * Try to preserve the existenceness of a tied hash | |
2569 | * element by using EXISTS and DELETE if possible. | |
2570 | * Fallback to FETCH and STORE otherwise. */ | |
2571 | if (SvCANEXISTDELETE(hv)) | |
2572 | preeminent = hv_exists_ent(hv, keysv, 0); | |
2573 | } | |
2574 | ||
2575 | he = hv_fetch_ent(hv, keysv, lval && !defer, 0); | |
2576 | svp = he ? &HeVAL(he) : NULL; | |
2577 | ||
2578 | ||
2579 | if (lval) { | |
2580 | if (!svp || !(sv = *svp) || sv == &PL_sv_undef) { | |
2581 | SV* lv; | |
2582 | SV* key2; | |
2583 | if (!defer) | |
2584 | DIE(aTHX_ PL_no_helem_sv, SVfARG(keysv)); | |
2585 | lv = sv_newmortal(); | |
2586 | sv_upgrade(lv, SVt_PVLV); | |
2587 | LvTYPE(lv) = 'y'; | |
2588 | sv_magic(lv, key2 = newSVsv(keysv), | |
2589 | PERL_MAGIC_defelem, NULL, 0); | |
2590 | /* sv_magic() increments refcount */ | |
2591 | SvREFCNT_dec_NN(key2); | |
0ad694a7 | 2592 | LvTARG(lv) = SvREFCNT_inc_simple_NN(hv); |
fedf30e1 DM |
2593 | LvTARGLEN(lv) = 1; |
2594 | sv = lv; | |
2595 | } | |
2596 | else { | |
2597 | if (localizing) { | |
2598 | if (HvNAME_get(hv) && isGV(sv)) | |
2599 | save_gp(MUTABLE_GV(sv), | |
2600 | !(PL_op->op_flags & OPf_SPECIAL)); | |
2601 | else if (preeminent) { | |
2602 | save_helem_flags(hv, keysv, svp, | |
2603 | (PL_op->op_flags & OPf_SPECIAL) | |
2604 | ? 0 : SAVEf_SETMAGIC); | |
2605 | sv = *svp; /* may have changed */ | |
2606 | } | |
2607 | else | |
2608 | SAVEHDELETE(hv, keysv); | |
2609 | } | |
2610 | } | |
2611 | } | |
2612 | else { | |
2613 | sv = (svp && *svp ? *svp : &PL_sv_undef); | |
2614 | /* see note in pp_helem() */ | |
2615 | if (SvRMAGICAL(hv) && SvGMAGICAL(sv)) | |
2616 | mg_get(sv); | |
2617 | } | |
2618 | } | |
2619 | goto finish; | |
2620 | } | |
2621 | ||
2622 | } /* switch */ | |
2623 | ||
2624 | actions >>= MDEREF_SHIFT; | |
2625 | } /* while */ | |
2626 | /* NOTREACHED */ | |
2627 | } | |
2628 | ||
2629 | ||
a0d0e21e LW |
2630 | PP(pp_iter) |
2631 | { | |
eb578fdb | 2632 | PERL_CONTEXT *cx; |
7d6c2cef | 2633 | SV *oldsv; |
1d7c1841 | 2634 | SV **itersvp; |
8a1f10dd | 2635 | SV *retsv; |
a0d0e21e | 2636 | |
84f05d57 JH |
2637 | SV *sv; |
2638 | AV *av; | |
2639 | IV ix; | |
2640 | IV inc; | |
2641 | ||
4ebe6e95 | 2642 | cx = CX_CUR(); |
1d7c1841 | 2643 | itersvp = CxITERVAR(cx); |
4b5c941e | 2644 | assert(itersvp); |
a48ce6be DM |
2645 | |
2646 | switch (CxTYPE(cx)) { | |
17c91640 | 2647 | |
b552b52c DM |
2648 | case CXt_LOOP_LAZYSV: /* string increment */ |
2649 | { | |
2650 | SV* cur = cx->blk_loop.state_u.lazysv.cur; | |
2651 | SV *end = cx->blk_loop.state_u.lazysv.end; | |
2652 | /* If the maximum is !SvOK(), pp_enteriter substitutes PL_sv_no. | |
2653 | It has SvPVX of "" and SvCUR of 0, which is what we want. */ | |
2654 | STRLEN maxlen = 0; | |
2655 | const char *max = SvPV_const(end, maxlen); | |
5d9574c1 | 2656 | if (UNLIKELY(SvNIOK(cur) || SvCUR(cur) > maxlen)) |
8a1f10dd | 2657 | goto retno; |
b552b52c DM |
2658 | |
2659 | oldsv = *itersvp; | |
6d3ca00e DM |
2660 | /* NB: on the first iteration, oldsv will have a ref count of at |
2661 | * least 2 (one extra from blk_loop.itersave), so the GV or pad | |
2662 | * slot will get localised; on subsequent iterations the RC==1 | |
2663 | * optimisation may kick in and the SV will be reused. */ | |
2664 | if (oldsv && LIKELY(SvREFCNT(oldsv) == 1 && !SvMAGICAL(oldsv))) { | |
b552b52c DM |
2665 | /* safe to reuse old SV */ |
2666 | sv_setsv(oldsv, cur); | |
a48ce6be | 2667 | } |
b552b52c DM |
2668 | else |
2669 | { | |
2670 | /* we need a fresh SV every time so that loop body sees a | |
2671 | * completely new SV for closures/references to work as | |
2672 | * they used to */ | |
2673 | *itersvp = newSVsv(cur); | |
6d3ca00e | 2674 | SvREFCNT_dec(oldsv); |
b552b52c DM |
2675 | } |
2676 | if (strEQ(SvPVX_const(cur), max)) | |
2677 | sv_setiv(cur, 0); /* terminate next time */ | |
2678 | else | |
2679 | sv_inc(cur); | |
2680 | break; | |
2681 | } | |
a48ce6be | 2682 | |
fcef60b4 DM |
2683 | case CXt_LOOP_LAZYIV: /* integer increment */ |
2684 | { | |
2685 | IV cur = cx->blk_loop.state_u.lazyiv.cur; | |
5d9574c1 | 2686 | if (UNLIKELY(cur > cx->blk_loop.state_u.lazyiv.end)) |
8a1f10dd | 2687 | goto retno; |
7f61b687 | 2688 | |
fcef60b4 | 2689 | oldsv = *itersvp; |
6d3ca00e DM |
2690 | /* see NB comment above */ |
2691 | if (oldsv && LIKELY(SvREFCNT(oldsv) == 1 && !SvMAGICAL(oldsv))) { | |
eaa5c2d6 | 2692 | /* safe to reuse old SV */ |
47b96a1e DM |
2693 | |
2694 | if ( (SvFLAGS(oldsv) & (SVTYPEMASK|SVf_THINKFIRST|SVf_IVisUV)) | |
2695 | == SVt_IV) | |
2696 | { | |
2697 | /* Cheap SvIOK_only(). | |
2698 | * Assert that flags which SvIOK_only() would test or | |
2699 | * clear can't be set, because we're SVt_IV */ | |
2700 | assert(!(SvFLAGS(oldsv) & | |
2701 | (SVf_OOK|SVf_UTF8|(SVf_OK & ~(SVf_IOK|SVp_IOK))))); | |
2702 | SvFLAGS(oldsv) |= (SVf_IOK|SVp_IOK); | |
2703 | /* SvIV_set() where sv_any points to head */ | |
2704 | oldsv->sv_u.svu_iv = cur; | |
2705 | ||
2706 | } | |
2707 | else | |
2708 | sv_setiv(oldsv, cur); | |
eaa5c2d6 | 2709 | } |
1c846c1f | 2710 | else |
eaa5c2d6 GA |
2711 | { |
2712 | /* we need a fresh SV every time so that loop body sees a | |
2713 | * completely new SV for closures/references to work as they | |
2714 | * used to */ | |
fcef60b4 | 2715 | *itersvp = newSViv(cur); |
6d3ca00e | 2716 | SvREFCNT_dec(oldsv); |
eaa5c2d6 | 2717 | } |
a2309040 | 2718 | |
5d9574c1 | 2719 | if (UNLIKELY(cur == IV_MAX)) { |
cdc1aa42 NC |
2720 | /* Handle end of range at IV_MAX */ |
2721 | cx->blk_loop.state_u.lazyiv.end = IV_MIN; | |
2722 | } else | |
2723 | ++cx->blk_loop.state_u.lazyiv.cur; | |
a48ce6be | 2724 | break; |
fcef60b4 | 2725 | } |
a48ce6be | 2726 | |
93661e56 DM |
2727 | case CXt_LOOP_LIST: /* for (1,2,3) */ |
2728 | ||
2729 | assert(OPpITER_REVERSED == 2); /* so inc becomes -1 or 1 */ | |
2730 | inc = 1 - (PL_op->op_private & OPpITER_REVERSED); | |
2731 | ix = (cx->blk_loop.state_u.stack.ix += inc); | |
2732 | if (UNLIKELY(inc > 0 | |
2733 | ? ix > cx->blk_oldsp | |
2734 | : ix <= cx->blk_loop.state_u.stack.basesp) | |
2735 | ) | |
8a1f10dd | 2736 | goto retno; |
93661e56 DM |
2737 | |
2738 | sv = PL_stack_base[ix]; | |
2739 | av = NULL; | |
2740 | goto loop_ary_common; | |
2741 | ||
2742 | case CXt_LOOP_ARY: /* for (@ary) */ | |
2743 | ||
2744 | av = cx->blk_loop.state_u.ary.ary; | |
2745 | inc = 1 - (PL_op->op_private & OPpITER_REVERSED); | |
2746 | ix = (cx->blk_loop.state_u.ary.ix += inc); | |
2747 | if (UNLIKELY(inc > 0 | |
2748 | ? ix > AvFILL(av) | |
2749 | : ix < 0) | |
2750 | ) | |
8a1f10dd | 2751 | goto retno; |
de080daa | 2752 | |
9d1ee8e0 | 2753 | if (UNLIKELY(SvRMAGICAL(av))) { |
a8a20bb6 DM |
2754 | SV * const * const svp = av_fetch(av, ix, FALSE); |
2755 | sv = svp ? *svp : NULL; | |
2756 | } | |
2757 | else { | |
2758 | sv = AvARRAY(av)[ix]; | |
de080daa | 2759 | } |
ef3e5ea9 | 2760 | |
93661e56 DM |
2761 | loop_ary_common: |
2762 | ||
d39c26a6 FC |
2763 | if (UNLIKELY(cx->cx_type & CXp_FOR_LVREF)) { |
2764 | SvSetMagicSV(*itersvp, sv); | |
2765 | break; | |
2766 | } | |
2767 | ||
5d9574c1 DM |
2768 | if (LIKELY(sv)) { |
2769 | if (UNLIKELY(SvIS_FREED(sv))) { | |
f38aa882 DM |
2770 | *itersvp = NULL; |
2771 | Perl_croak(aTHX_ "Use of freed value in iteration"); | |
2772 | } | |
60779a30 | 2773 | if (SvPADTMP(sv)) { |
8e079c2a | 2774 | sv = newSVsv(sv); |
60779a30 | 2775 | } |
8e079c2a FC |
2776 | else { |
2777 | SvTEMP_off(sv); | |
2778 | SvREFCNT_inc_simple_void_NN(sv); | |
2779 | } | |
de080daa | 2780 | } |
93661e56 | 2781 | else if (av) { |
199f858d | 2782 | sv = newSVavdefelem(av, ix, 0); |
de080daa | 2783 | } |
a600f7e6 FC |
2784 | else |
2785 | sv = &PL_sv_undef; | |
a0d0e21e | 2786 | |
de080daa DM |
2787 | oldsv = *itersvp; |
2788 | *itersvp = sv; | |
2789 | SvREFCNT_dec(oldsv); | |
de080daa | 2790 | break; |
a48ce6be DM |
2791 | |
2792 | default: | |
2793 | DIE(aTHX_ "panic: pp_iter, type=%u", CxTYPE(cx)); | |
2794 | } | |
8a1f10dd DM |
2795 | |
2796 | retsv = &PL_sv_yes; | |
2797 | if (0) { | |
2798 | retno: | |
2799 | retsv = &PL_sv_no; | |
2800 | } | |
2801 | /* pp_enteriter should have pre-extended the stack */ | |
2802 | assert(PL_stack_sp < PL_stack_max); | |
2803 | *++PL_stack_sp =retsv; | |
2804 | ||
2805 | return PL_op->op_next; | |
a0d0e21e LW |
2806 | } |
2807 | ||
ef07e810 DM |
2808 | /* |
2809 | A description of how taint works in pattern matching and substitution. | |
2810 | ||
284167a5 S |
2811 | This is all conditional on NO_TAINT_SUPPORT not being defined. Under |
2812 | NO_TAINT_SUPPORT, taint-related operations should become no-ops. | |
2813 | ||
4e19c54b | 2814 | While the pattern is being assembled/concatenated and then compiled, |
284167a5 S |
2815 | PL_tainted will get set (via TAINT_set) if any component of the pattern |
2816 | is tainted, e.g. /.*$tainted/. At the end of pattern compilation, | |
2817 | the RXf_TAINTED flag is set on the pattern if PL_tainted is set (via | |
1738e041 DM |
2818 | TAINT_get). It will also be set if any component of the pattern matches |
2819 | based on locale-dependent behavior. | |
ef07e810 | 2820 | |
0ab462a6 DM |
2821 | When the pattern is copied, e.g. $r = qr/..../, the SV holding the ref to |
2822 | the pattern is marked as tainted. This means that subsequent usage, such | |
284167a5 S |
2823 | as /x$r/, will set PL_tainted using TAINT_set, and thus RXf_TAINTED, |
2824 | on the new pattern too. | |
ef07e810 | 2825 | |
272d35c9 | 2826 | RXf_TAINTED_SEEN is used post-execution by the get magic code |
ef07e810 DM |
2827 | of $1 et al to indicate whether the returned value should be tainted. |
2828 | It is the responsibility of the caller of the pattern (i.e. pp_match, | |
2829 | pp_subst etc) to set this flag for any other circumstances where $1 needs | |
2830 | to be tainted. | |
2831 | ||
2832 | The taint behaviour of pp_subst (and pp_substcont) is quite complex. | |
2833 | ||
2834 | There are three possible sources of taint | |
2835 | * the source string | |
2836 | * the pattern (both compile- and run-time, RXf_TAINTED / RXf_TAINTED_SEEN) | |
2837 | * the replacement string (or expression under /e) | |
2838 | ||
2839 | There are four destinations of taint and they are affected by the sources | |
2840 | according to the rules below: | |
2841 | ||
2842 | * the return value (not including /r): | |
2843 | tainted by the source string and pattern, but only for the | |
2844 | number-of-iterations case; boolean returns aren't tainted; | |
2845 | * the modified string (or modified copy under /r): | |
2846 | tainted by the source string, pattern, and replacement strings; | |
2847 | * $1 et al: | |
2848 | tainted by the pattern, and under 'use re "taint"', by the source | |
2849 | string too; | |
2850 | * PL_taint - i.e. whether subsequent code (e.g. in a /e block) is tainted: | |
2851 | should always be unset before executing subsequent code. | |
2852 | ||
2853 | The overall action of pp_subst is: | |
2854 | ||
2855 | * at the start, set bits in rxtainted indicating the taint status of | |
2856 | the various sources. | |
2857 | ||
2858 | * After each pattern execution, update the SUBST_TAINT_PAT bit in | |
2859 | rxtainted if RXf_TAINTED_SEEN has been set, to indicate that the | |
2860 | pattern has subsequently become tainted via locale ops. | |
2861 | ||
2862 | * If control is being passed to pp_substcont to execute a /e block, | |
2863 | save rxtainted in the CXt_SUBST block, for future use by | |
2864 | pp_substcont. | |
2865 | ||
2866 | * Whenever control is being returned to perl code (either by falling | |
2867 | off the "end" of pp_subst/pp_substcont, or by entering a /e block), | |
2868 | use the flag bits in rxtainted to make all the appropriate types of | |
0ab462a6 DM |
2869 | destination taint visible; e.g. set RXf_TAINTED_SEEN so that $1 |
2870 | et al will appear tainted. | |
ef07e810 DM |
2871 | |
2872 | pp_match is just a simpler version of the above. | |
2873 | ||
2874 | */ | |
2875 | ||
a0d0e21e LW |
2876 | PP(pp_subst) |
2877 | { | |
20b7effb | 2878 | dSP; dTARG; |
eb578fdb | 2879 | PMOP *pm = cPMOP; |
a0d0e21e | 2880 | PMOP *rpm = pm; |
eb578fdb | 2881 | char *s; |
a0d0e21e | 2882 | char *strend; |
5c144d81 | 2883 | const char *c; |
a0d0e21e | 2884 | STRLEN clen; |
3c6ef0a5 FC |
2885 | SSize_t iters = 0; |
2886 | SSize_t maxiters; | |
a0d0e21e | 2887 | bool once; |
ef07e810 DM |
2888 | U8 rxtainted = 0; /* holds various SUBST_TAINT_* flag bits. |
2889 | See "how taint works" above */ | |
a0d0e21e | 2890 | char *orig; |
1ed74d04 | 2891 | U8 r_flags; |
eb578fdb | 2892 | REGEXP *rx = PM_GETRE(pm); |
a0d0e21e LW |
2893 | STRLEN len; |
2894 | int force_on_match = 0; | |
0bcc34c2 | 2895 | const I32 oldsave = PL_savestack_ix; |
792b2c16 | 2896 | STRLEN slen; |
26a74523 | 2897 | bool doutf8 = FALSE; /* whether replacement is in utf8 */ |
db2c6cb3 | 2898 | #ifdef PERL_ANY_COW |
106d9a13 | 2899 | bool was_cow; |
ed252734 | 2900 | #endif |
a0714e2c | 2901 | SV *nsv = NULL; |
b770e143 | 2902 | /* known replacement string? */ |
eb578fdb | 2903 | SV *dstr = (pm->op_pmflags & PMf_CONST) ? POPs : NULL; |
a0d0e21e | 2904 | |
f410a211 NC |
2905 | PERL_ASYNC_CHECK(); |
2906 | ||
533c011a | 2907 | if (PL_op->op_flags & OPf_STACKED) |
a0d0e21e | 2908 | TARG = POPs; |
6ffceeb7 | 2909 | else if (ARGTARG) |
59f00321 | 2910 | GETTARGET; |
a0d0e21e | 2911 | else { |
54b9620d | 2912 | TARG = DEFSV; |
a0d0e21e | 2913 | EXTEND(SP,1); |
1c846c1f | 2914 | } |
d9f424b2 | 2915 | |
64534138 | 2916 | SvGETMAGIC(TARG); /* must come before cow check */ |
db2c6cb3 | 2917 | #ifdef PERL_ANY_COW |
106d9a13 DM |
2918 | /* note that a string might get converted to COW during matching */ |
2919 | was_cow = cBOOL(SvIsCOW(TARG)); | |
ed252734 | 2920 | #endif |
d13a5d3b TC |
2921 | if (!(rpm->op_pmflags & PMf_NONDESTRUCT)) { |
2922 | #ifndef PERL_ANY_COW | |
2923 | if (SvIsCOW(TARG)) | |
2924 | sv_force_normal_flags(TARG,0); | |
2925 | #endif | |
2926 | if ((SvREADONLY(TARG) | |
2927 | || ( ((SvTYPE(TARG) == SVt_PVGV && isGV_with_GP(TARG)) | |
2928 | || SvTYPE(TARG) > SVt_PVLV) | |
2929 | && !(SvTYPE(TARG) == SVt_PVGV && SvFAKE(TARG))))) | |
2930 | Perl_croak_no_modify(); | |
2931 | } | |
8ec5e241 NIS |
2932 | PUTBACK; |
2933 | ||
6ac6605d DM |
2934 | orig = SvPV_nomg(TARG, len); |
2935 | /* note we don't (yet) force the var into being a string; if we fail | |
92711104 | 2936 | * to match, we leave as-is; on successful match however, we *will* |
6ac6605d | 2937 | * coerce into a string, then repeat the match */ |
4499db73 | 2938 | if (!SvPOKp(TARG) || SvTYPE(TARG) == SVt_PVGV || SvVOK(TARG)) |
a0d0e21e | 2939 | force_on_match = 1; |
20be6587 DM |
2940 | |
2941 | /* only replace once? */ | |
2942 | once = !(rpm->op_pmflags & PMf_GLOBAL); | |
2943 | ||
ef07e810 | 2944 | /* See "how taint works" above */ |
284167a5 | 2945 | if (TAINTING_get) { |
20be6587 DM |
2946 | rxtainted = ( |
2947 | (SvTAINTED(TARG) ? SUBST_TAINT_STR : 0) | |
284167a5 | 2948 | | (RX_ISTAINTED(rx) ? SUBST_TAINT_PAT : 0) |
20be6587 DM |
2949 | | ((pm->op_pmflags & PMf_RETAINT) ? SUBST_TAINT_RETAINT : 0) |
2950 | | ((once && !(rpm->op_pmflags & PMf_NONDESTRUCT)) | |
2951 | ? SUBST_TAINT_BOOLRET : 0)); | |
2952 | TAINT_NOT; | |
2953 | } | |
a12c0f56 | 2954 | |
a0d0e21e | 2955 | force_it: |
6ac6605d DM |
2956 | if (!pm || !orig) |
2957 | DIE(aTHX_ "panic: pp_subst, pm=%p, orig=%p", pm, orig); | |
a0d0e21e | 2958 | |
6ac6605d DM |
2959 | strend = orig + len; |
2960 | slen = DO_UTF8(TARG) ? utf8_length((U8*)orig, (U8*)strend) : len; | |
792b2c16 JH |
2961 | maxiters = 2 * slen + 10; /* We can match twice at each |
2962 | position, once with zero-length, | |
2963 | second time with non-zero. */ | |
a0d0e21e | 2964 | |
794826f4 YO |
2965 | /* handle the empty pattern */ |
2966 | if (!RX_PRELEN(rx) && PL_curpm && !ReANY(rx)->mother_re) { | |
2967 | if (PL_curpm == PL_reg_curpm) | |
31775478 | 2968 | Perl_croak(aTHX_ "Use of the empty pattern inside of " |
794826f4 | 2969 | "a regex code block is forbidden"); |
3280af22 | 2970 | pm = PL_curpm; |
aaa362c4 | 2971 | rx = PM_GETRE(pm); |
a0d0e21e | 2972 | } |
6502e081 | 2973 | |
6e240d0b | 2974 | #ifdef PERL_SAWAMPERSAND |
6502e081 DM |
2975 | r_flags = ( RX_NPARENS(rx) |
2976 | || PL_sawampersand | |
6502e081 | 2977 | || (RX_EXTFLAGS(rx) & (RXf_EVAL_SEEN|RXf_PMf_KEEPCOPY)) |
5b0e71e9 | 2978 | || (rpm->op_pmflags & PMf_KEEPCOPY) |
6502e081 DM |
2979 | ) |
2980 | ? REXEC_COPY_STR | |
2981 | : 0; | |
6e240d0b FC |
2982 | #else |
2983 | r_flags = REXEC_COPY_STR; | |
2984 | #endif | |
7fba1cd6 | 2985 | |
0395280b | 2986 | if (!CALLREGEXEC(rx, orig, strend, orig, 0, TARG, NULL, r_flags)) |
8b64c330 | 2987 | { |
5e79dfb9 DM |
2988 | SPAGAIN; |
2989 | PUSHs(rpm->op_pmflags & PMf_NONDESTRUCT ? TARG : &PL_sv_no); | |
2990 | LEAVE_SCOPE(oldsave); | |
2991 | RETURN; | |
2992 | } | |
1754320d FC |
2993 | PL_curpm = pm; |
2994 | ||
71be2cbc | 2995 | /* known replacement string? */ |
f272994b | 2996 | if (dstr) { |
8514a05a JH |
2997 | /* replacement needing upgrading? */ |
2998 | if (DO_UTF8(TARG) && !doutf8) { | |
db79b45b | 2999 | nsv = sv_newmortal(); |
4a176938 | 3000 | SvSetSV(nsv, dstr); |
8df0e7a2 | 3001 | sv_utf8_upgrade(nsv); |
5c144d81 | 3002 | c = SvPV_const(nsv, clen); |
4a176938 JH |
3003 | doutf8 = TRUE; |
3004 | } | |
3005 | else { | |
5c144d81 | 3006 | c = SvPV_const(dstr, clen); |
4a176938 | 3007 | doutf8 = DO_UTF8(dstr); |
8514a05a | 3008 | } |
bb933b9b FC |
3009 | |
3010 | if (SvTAINTED(dstr)) | |
3011 | rxtainted |= SUBST_TAINT_REPL; | |
f272994b A |
3012 | } |
3013 | else { | |
6136c704 | 3014 | c = NULL; |
f272994b A |
3015 | doutf8 = FALSE; |
3016 | } | |
3017 | ||
71be2cbc | 3018 | /* can do inplace substitution? */ |
ed252734 | 3019 | if (c |
db2c6cb3 | 3020 | #ifdef PERL_ANY_COW |
106d9a13 | 3021 | && !was_cow |
ed252734 | 3022 | #endif |
fbfb1899 | 3023 | && (I32)clen <= RX_MINLENRET(rx) |
9cefd268 FC |
3024 | && ( once |
3025 | || !(r_flags & REXEC_COPY_STR) | |
3026 | || (!SvGMAGICAL(dstr) && !(RX_EXTFLAGS(rx) & RXf_EVAL_SEEN)) | |
3027 | ) | |
dbc200c5 | 3028 | && !(RX_EXTFLAGS(rx) & RXf_NO_INPLACE_SUBST) |
8ca8a454 NC |
3029 | && (!doutf8 || SvUTF8(TARG)) |
3030 | && !(rpm->op_pmflags & PMf_NONDESTRUCT)) | |
8b030b38 | 3031 | { |
ec911639 | 3032 | |
db2c6cb3 | 3033 | #ifdef PERL_ANY_COW |
106d9a13 | 3034 | /* string might have got converted to COW since we set was_cow */ |
ed252734 | 3035 | if (SvIsCOW(TARG)) { |
f7a8268c | 3036 | if (!force_on_match) |
ed252734 | 3037 | goto have_a_cow; |
f7a8268c | 3038 | assert(SvVOK(TARG)); |
ed252734 NC |
3039 | } |
3040 | #endif | |
71be2cbc | 3041 | if (force_on_match) { |
6ac6605d DM |
3042 | /* redo the first match, this time with the orig var |
3043 | * forced into being a string */ | |
71be2cbc | 3044 | force_on_match = 0; |
6ac6605d | 3045 | orig = SvPV_force_nomg(TARG, len); |
71be2cbc | 3046 | goto force_it; |
3047 | } | |
39b40493 | 3048 | |
71be2cbc | 3049 | if (once) { |
c67ab8f2 | 3050 | char *d, *m; |
20be6587 DM |
3051 | if (RX_MATCH_TAINTED(rx)) /* run time pattern taint, eg locale */ |
3052 | rxtainted |= SUBST_TAINT_PAT; | |
07bc277f NC |
3053 | m = orig + RX_OFFS(rx)[0].start; |
3054 | d = orig + RX_OFFS(rx)[0].end; | |
71be2cbc | 3055 | s = orig; |
3056 | if (m - s > strend - d) { /* faster to shorten from end */ | |
2ec7214c | 3057 | I32 i; |
71be2cbc | 3058 | if (clen) { |
3059 | Copy(c, m, clen, char); | |
3060 | m += clen; | |
a0d0e21e | 3061 | } |
71be2cbc | 3062 | i = strend - d; |
3063 | if (i > 0) { | |
3064 | Move(d, m, i, char); | |
3065 | m += i; | |
a0d0e21e | 3066 | } |
71be2cbc | 3067 | *m = '\0'; |
3068 | SvCUR_set(TARG, m - s); | |
3069 | } | |
2ec7214c DM |
3070 | else { /* faster from front */ |
3071 | I32 i = m - s; | |
71be2cbc | 3072 | d -= clen; |
2ec7214c DM |
3073 | if (i > 0) |
3074 | Move(s, d - i, i, char); | |
71be2cbc | 3075 | sv_chop(TARG, d-i); |
71be2cbc | 3076 | if (clen) |
c947cd8d | 3077 | Copy(c, d, clen, char); |
71be2cbc | 3078 | } |
8ec5e241 | 3079 | SPAGAIN; |
8ca8a454 | 3080 | PUSHs(&PL_sv_yes); |
71be2cbc | 3081 | } |
3082 | else { | |
c67ab8f2 | 3083 | char *d, *m; |
0395280b | 3084 | d = s = RX_OFFS(rx)[0].start + orig; |
71be2cbc | 3085 | do { |
2b25edcf | 3086 | I32 i; |
5d9574c1 | 3087 | if (UNLIKELY(iters++ > maxiters)) |
cea2e8a9 | 3088 | DIE(aTHX_ "Substitution loop"); |
5d9574c1 | 3089 | if (UNLIKELY(RX_MATCH_TAINTED(rx))) /* run time pattern taint, eg locale */ |
20be6587 | 3090 | rxtainted |= SUBST_TAINT_PAT; |
07bc277f | 3091 | m = RX_OFFS(rx)[0].start + orig; |
155aba94 | 3092 | if ((i = m - s)) { |
71be2cbc | 3093 | if (s != d) |
3094 | Move(s, d, i, char); | |
3095 | d += i; | |
a0d0e21e | 3096 | } |
71be2cbc | 3097 | if (clen) { |
3098 | Copy(c, d, clen, char); | |
3099 | d += clen; | |
3100 | } | |
07bc277f | 3101 | s = RX_OFFS(rx)[0].end + orig; |
7ce41e5c FC |
3102 | } while (CALLREGEXEC(rx, s, strend, orig, |
3103 | s == m, /* don't match same null twice */ | |
f722798b | 3104 | TARG, NULL, |
d5e7783a | 3105 | REXEC_NOT_FIRST|REXEC_IGNOREPOS|REXEC_FAIL_ON_UNDERFLOW)); |
71be2cbc | 3106 | if (s != d) { |
2b25edcf | 3107 | I32 i = strend - s; |
aa07b2f6 | 3108 | SvCUR_set(TARG, d - SvPVX_const(TARG) + i); |
71be2cbc | 3109 | Move(s, d, i+1, char); /* include the NUL */ |
a0d0e21e | 3110 | } |
8ec5e241 | 3111 | SPAGAIN; |
3c6ef0a5 | 3112 | mPUSHi(iters); |
a0d0e21e LW |
3113 | } |
3114 | } | |
ff6e92e8 | 3115 | else { |
1754320d | 3116 | bool first; |
c67ab8f2 | 3117 | char *m; |
1754320d | 3118 | SV *repl; |
a0d0e21e | 3119 | if (force_on_match) { |
6ac6605d DM |
3120 | /* redo the first match, this time with the orig var |
3121 | * forced into being a string */ | |
a0d0e21e | 3122 | force_on_match = 0; |
0c1438a1 NC |
3123 | if (rpm->op_pmflags & PMf_NONDESTRUCT) { |
3124 | /* I feel that it should be possible to avoid this mortal copy | |
3125 | given that the code below copies into a new destination. | |
3126 | However, I suspect it isn't worth the complexity of | |
3127 | unravelling the C<goto force_it> for the small number of | |
3128 | cases where it would be viable to drop into the copy code. */ | |
3129 | TARG = sv_2mortal(newSVsv(TARG)); | |
3130 | } | |
6ac6605d | 3131 | orig = SvPV_force_nomg(TARG, len); |
a0d0e21e LW |
3132 | goto force_it; |
3133 | } | |
db2c6cb3 | 3134 | #ifdef PERL_ANY_COW |
ed252734 NC |
3135 | have_a_cow: |
3136 | #endif | |
20be6587 DM |
3137 | if (RX_MATCH_TAINTED(rx)) /* run time pattern taint, eg locale */ |
3138 | rxtainted |= SUBST_TAINT_PAT; | |
1754320d | 3139 | repl = dstr; |
0395280b DM |
3140 | s = RX_OFFS(rx)[0].start + orig; |
3141 | dstr = newSVpvn_flags(orig, s-orig, | |
3142 | SVs_TEMP | (DO_UTF8(TARG) ? SVf_UTF8 : 0)); | |
a0d0e21e | 3143 | if (!c) { |
eb578fdb | 3144 | PERL_CONTEXT *cx; |
8ec5e241 | 3145 | SPAGAIN; |
0395280b | 3146 | m = orig; |
20be6587 DM |
3147 | /* note that a whole bunch of local vars are saved here for |
3148 | * use by pp_substcont: here's a list of them in case you're | |
3149 | * searching for places in this sub that uses a particular var: | |
3150 | * iters maxiters r_flags oldsave rxtainted orig dstr targ | |
3151 | * s m strend rx once */ | |
490576d1 | 3152 | CX_PUSHSUBST(cx); |
20e98b0f | 3153 | RETURNOP(cPMOP->op_pmreplrootu.op_pmreplroot); |
a0d0e21e | 3154 | } |
1754320d | 3155 | first = TRUE; |
a0d0e21e | 3156 | do { |
5d9574c1 | 3157 | if (UNLIKELY(iters++ > maxiters)) |
cea2e8a9 | 3158 | DIE(aTHX_ "Substitution loop"); |
5d9574c1 | 3159 | if (UNLIKELY(RX_MATCH_TAINTED(rx))) |
20be6587 | 3160 | rxtainted |= SUBST_TAINT_PAT; |
07bc277f | 3161 | if (RX_MATCH_COPIED(rx) && RX_SUBBEG(rx) != orig) { |
c67ab8f2 DM |
3162 | char *old_s = s; |
3163 | char *old_orig = orig; | |
6502e081 | 3164 | assert(RX_SUBOFFSET(rx) == 0); |
c67ab8f2 | 3165 | |
07bc277f | 3166 | orig = RX_SUBBEG(rx); |
c67ab8f2 DM |
3167 | s = orig + (old_s - old_orig); |
3168 | strend = s + (strend - old_s); | |
a0d0e21e | 3169 | } |
07bc277f | 3170 | m = RX_OFFS(rx)[0].start + orig; |
64534138 | 3171 | sv_catpvn_nomg_maybeutf8(dstr, s, m - s, DO_UTF8(TARG)); |
07bc277f | 3172 | s = RX_OFFS(rx)[0].end + orig; |
1754320d FC |
3173 | if (first) { |
3174 | /* replacement already stringified */ | |
3175 | if (clen) | |
64534138 | 3176 | sv_catpvn_nomg_maybeutf8(dstr, c, clen, doutf8); |
1754320d FC |
3177 | first = FALSE; |
3178 | } | |
3179 | else { | |
8df0e7a2 | 3180 | sv_catsv(dstr, repl); |
5d9574c1 | 3181 | if (UNLIKELY(SvTAINTED(repl))) |
bb933b9b | 3182 | rxtainted |= SUBST_TAINT_REPL; |
1754320d | 3183 | } |
a0d0e21e LW |
3184 | if (once) |
3185 | break; | |
ff27773b KW |
3186 | } while (CALLREGEXEC(rx, s, strend, orig, |
3187 | s == m, /* Yields minend of 0 or 1 */ | |
d5e7783a DM |
3188 | TARG, NULL, |
3189 | REXEC_NOT_FIRST|REXEC_IGNOREPOS|REXEC_FAIL_ON_UNDERFLOW)); | |
aba224f7 | 3190 | assert(strend >= s); |
64534138 | 3191 | sv_catpvn_nomg_maybeutf8(dstr, s, strend - s, DO_UTF8(TARG)); |
748a9306 | 3192 | |
8ca8a454 NC |
3193 | if (rpm->op_pmflags & PMf_NONDESTRUCT) { |
3194 | /* From here on down we're using the copy, and leaving the original | |
3195 | untouched. */ | |
3196 | TARG = dstr; | |
3197 | SPAGAIN; | |
3198 | PUSHs(dstr); | |
3199 | } else { | |
db2c6cb3 | 3200 | #ifdef PERL_ANY_COW |
8ca8a454 NC |
3201 | /* The match may make the string COW. If so, brilliant, because |
3202 | that's just saved us one malloc, copy and free - the regexp has | |
3203 | donated the old buffer, and we malloc an entirely new one, rather | |
3204 | than the regexp malloc()ing a buffer and copying our original, | |
3205 | only for us to throw it away here during the substitution. */ | |
3206 | if (SvIsCOW(TARG)) { | |
3207 | sv_force_normal_flags(TARG, SV_COW_DROP_PV); | |
3208 | } else | |
ed252734 | 3209 | #endif |
8ca8a454 NC |
3210 | { |
3211 | SvPV_free(TARG); | |
3212 | } | |
3213 | SvPV_set(TARG, SvPVX(dstr)); | |
3214 | SvCUR_set(TARG, SvCUR(dstr)); | |
3215 | SvLEN_set(TARG, SvLEN(dstr)); | |
64534138 | 3216 | SvFLAGS(TARG) |= SvUTF8(dstr); |
8ca8a454 | 3217 | SvPV_set(dstr, NULL); |
748a9306 | 3218 | |
8ca8a454 | 3219 | SPAGAIN; |
3c6ef0a5 | 3220 | mPUSHi(iters); |
8ca8a454 NC |
3221 | } |
3222 | } | |
3223 | ||
3224 | if (!(rpm->op_pmflags & PMf_NONDESTRUCT)) { | |
3225 | (void)SvPOK_only_UTF8(TARG); | |
a0d0e21e | 3226 | } |
20be6587 | 3227 | |
ef07e810 | 3228 | /* See "how taint works" above */ |
284167a5 | 3229 | if (TAINTING_get) { |
20be6587 DM |
3230 | if ((rxtainted & SUBST_TAINT_PAT) || |
3231 | ((rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_RETAINT)) == | |
3232 | (SUBST_TAINT_STR|SUBST_TAINT_RETAINT)) | |
3233 | ) | |
3234 | (RX_MATCH_TAINTED_on(rx)); /* taint $1 et al */ | |
3235 | ||
3236 | if (!(rxtainted & SUBST_TAINT_BOOLRET) | |
3237 | && (rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_PAT)) | |
3238 | ) | |
3239 | SvTAINTED_on(TOPs); /* taint return value */ | |
3240 | else | |
3241 | SvTAINTED_off(TOPs); /* may have got tainted earlier */ | |
3242 | ||
3243 | /* needed for mg_set below */ | |
284167a5 S |
3244 | TAINT_set( |
3245 | cBOOL(rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_PAT|SUBST_TAINT_REPL)) | |
3246 | ); | |
20be6587 DM |
3247 | SvTAINT(TARG); |
3248 | } | |
3249 | SvSETMAGIC(TARG); /* PL_tainted must be correctly set for this mg_set */ | |
3250 | TAINT_NOT; | |
f1a76097 DM |
3251 | LEAVE_SCOPE(oldsave); |
3252 | RETURN; | |
a0d0e21e LW |
3253 | } |
3254 | ||
3255 | PP(pp_grepwhile) | |
3256 | { | |
20b7effb | 3257 | dSP; |
a0d0e21e LW |
3258 | |
3259 | if (SvTRUEx(POPs)) | |
3280af22 NIS |
3260 | PL_stack_base[PL_markstack_ptr[-1]++] = PL_stack_base[*PL_markstack_ptr]; |
3261 | ++*PL_markstack_ptr; | |
b2a2a901 | 3262 | FREETMPS; |
d343c3ef | 3263 | LEAVE_with_name("grep_item"); /* exit inner scope */ |
a0d0e21e LW |
3264 | |
3265 | /* All done yet? */ | |
5d9574c1 | 3266 | if (UNLIKELY(PL_stack_base + *PL_markstack_ptr > SP)) { |
a0d0e21e | 3267 | I32 items; |
1c23e2bd | 3268 | const U8 gimme = GIMME_V; |
a0d0e21e | 3269 | |
d343c3ef | 3270 | LEAVE_with_name("grep"); /* exit outer scope */ |
a0d0e21e | 3271 | (void)POPMARK; /* pop src */ |
3280af22 | 3272 | items = --*PL_markstack_ptr - PL_markstack_ptr[-1]; |
a0d0e21e | 3273 | (void)POPMARK; /* pop dst */ |
3280af22 | 3274 | SP = PL_stack_base + POPMARK; /* pop original mark */ |
54310121 | 3275 | if (gimme == G_SCALAR) { |
7cc47870 RGS |
3276 | dTARGET; |
3277 | XPUSHi(items); | |
a0d0e21e | 3278 | } |
54310121 | 3279 | else if (gimme == G_ARRAY) |
3280 | SP += items; | |
a0d0e21e LW |
3281 | RETURN; |
3282 | } | |
3283 | else { | |
3284 | SV *src; | |
3285 | ||
d343c3ef | 3286 | ENTER_with_name("grep_item"); /* enter inner scope */ |
1d7c1841 | 3287 | SAVEVPTR(PL_curpm); |
a0d0e21e | 3288 | |
6cae08a8 | 3289 | src = PL_stack_base[TOPMARK]; |
60779a30 | 3290 | if (SvPADTMP(src)) { |
6cae08a8 | 3291 | src = PL_stack_base[TOPMARK] = sv_mortalcopy(src); |
a0ed822e FC |
3292 | PL_tmps_floor++; |
3293 | } | |
a0d0e21e | 3294 | SvTEMP_off(src); |
ffd49c98 | 3295 | DEFSV_set(src); |
a0d0e21e LW |
3296 | |
3297 | RETURNOP(cLOGOP->op_other); | |
3298 | } | |
3299 | } | |
3300 | ||
799da9d7 | 3301 | /* leave_adjust_stacks(): |
f7a874b8 | 3302 | * |
e02ce34b DM |
3303 | * Process a scope's return args (in the range from_sp+1 .. PL_stack_sp), |
3304 | * positioning them at to_sp+1 onwards, and do the equivalent of a | |
3305 | * FREEMPS and TAINT_NOT. | |
3306 | * | |
f7a874b8 DM |
3307 | * Not intended to be called in void context. |
3308 | * | |
799da9d7 DM |
3309 | * When leaving a sub, eval, do{} or other scope, the things that need |
3310 | * doing to process the return args are: | |
f7a874b8 | 3311 | * * in scalar context, only return the last arg (or PL_sv_undef if none); |
799da9d7 DM |
3312 | * * for the types of return that return copies of their args (such |
3313 | * as rvalue sub return), make a mortal copy of every return arg, | |
3314 | * except where we can optimise the copy away without it being | |
3315 | * semantically visible; | |
3316 | * * make sure that the arg isn't prematurely freed; in the case of an | |
3317 | * arg not copied, this may involve mortalising it. For example, in | |
f7a874b8 DM |
3318 | * C<sub f { my $x = ...; $x }>, $x would be freed when we do |
3319 | * CX_LEAVE_SCOPE(cx) unless it's protected or copied. | |
3320 | * | |
799da9d7 DM |
3321 | * What condition to use when deciding whether to pass the arg through |
3322 | * or make a copy, is determined by the 'pass' arg; its valid values are: | |
3323 | * 0: rvalue sub/eval exit | |
3324 | * 1: other rvalue scope exit | |
3325 | * 2: :lvalue sub exit in rvalue context | |
3326 | * 3: :lvalue sub exit in lvalue context and other lvalue scope exits | |
3327 | * | |
f7a874b8 | 3328 | * There is a big issue with doing a FREETMPS. We would like to free any |
799da9d7 | 3329 | * temps created by the last statement which the sub executed, rather than |
f7a874b8 DM |
3330 | * leaving them for the caller. In a situation where a sub call isn't |
3331 | * soon followed by a nextstate (e.g. nested recursive calls, a la | |
3332 | * fibonacci()), temps can accumulate, causing memory and performance | |
3333 | * issues. | |
3334 | * | |
3335 | * On the other hand, we don't want to free any TEMPs which are keeping | |
799da9d7 DM |
3336 | * alive any return args that we skipped copying; nor do we wish to undo |
3337 | * any mortalising done here. | |
f7a874b8 DM |
3338 | * |
3339 | * The solution is to split the temps stack frame into two, with a cut | |
3340 | * point delineating the two halves. We arrange that by the end of this | |
3341 | * function, all the temps stack frame entries we wish to keep are in the | |
799da9d7 | 3342 | * range PL_tmps_floor+1.. tmps_base-1, while the ones to free now are in |
f7a874b8 DM |
3343 | * the range tmps_base .. PL_tmps_ix. During the course of this |
3344 | * function, tmps_base starts off as PL_tmps_floor+1, then increases | |
3345 | * whenever we find or create a temp that we know should be kept. In | |
3346 | * general the stuff above tmps_base is undecided until we reach the end, | |
3347 | * and we may need a sort stage for that. | |
3348 | * | |
3349 | * To determine whether a TEMP is keeping a return arg alive, every | |
3350 | * arg that is kept rather than copied and which has the SvTEMP flag | |
3351 | * set, has the flag temporarily unset, to mark it. At the end we scan | |
799da9d7 | 3352 | * the temps stack frame above the cut for entries without SvTEMP and |
f7a874b8 | 3353 | * keep them, while turning SvTEMP on again. Note that if we die before |
799da9d7 | 3354 | * the SvTEMPs flags are set again, its safe: at worst, subsequent use of |
f7a874b8 DM |
3355 | * those SVs may be slightly less efficient. |
3356 | * | |
3357 | * In practice various optimisations for some common cases mean we can | |
3358 | * avoid most of the scanning and swapping about with the temps stack. | |
3359 | */ | |
3360 | ||
799da9d7 | 3361 | void |
1c23e2bd | 3362 | Perl_leave_adjust_stacks(pTHX_ SV **from_sp, SV **to_sp, U8 gimme, int pass) |
a0d0e21e | 3363 | { |
263e0548 | 3364 | dVAR; |
20b7effb | 3365 | dSP; |
f7a874b8 DM |
3366 | SSize_t tmps_base; /* lowest index into tmps stack that needs freeing now */ |
3367 | SSize_t nargs; | |
3368 | ||
799da9d7 DM |
3369 | PERL_ARGS_ASSERT_LEAVE_ADJUST_STACKS; |
3370 | ||
f7a874b8 DM |
3371 | TAINT_NOT; |
3372 | ||
3373 | if (gimme == G_ARRAY) { | |
e02ce34b DM |
3374 | nargs = SP - from_sp; |
3375 | from_sp++; | |
f7a874b8 DM |
3376 | } |
3377 | else { | |
3378 | assert(gimme == G_SCALAR); | |
e02ce34b | 3379 | if (UNLIKELY(from_sp >= SP)) { |
f7a874b8 | 3380 | /* no return args */ |
e02ce34b | 3381 | assert(from_sp == SP); |
f7a874b8 DM |
3382 | EXTEND(SP, 1); |
3383 | *++SP = &PL_sv_undef; | |
e02ce34b | 3384 | to_sp = SP; |
f7a874b8 DM |
3385 | nargs = 0; |
3386 | } | |
3387 | else { | |
3388 | from_sp = SP; | |
3389 | nargs = 1; | |
3390 | } | |
3391 | } | |
3392 | ||
3393 | /* common code for G_SCALAR and G_ARRAY */ | |
3394 | ||
3395 | tmps_base = PL_tmps_floor + 1; | |
3396 | ||
3397 | assert(nargs >= 0); | |
3398 | if (nargs) { | |
3399 | /* pointer version of tmps_base. Not safe across temp stack | |
3400 | * reallocs. */ | |
3401 | SV **tmps_basep; | |
3402 | ||
3403 | EXTEND_MORTAL(nargs); /* one big extend for worst-case scenario */ | |
3404 | tmps_basep = PL_tmps_stack + tmps_base; | |
f7a874b8 DM |
3405 | |
3406 | /* process each return arg */ | |
3407 | ||
3408 | do { | |
3409 | SV *sv = *from_sp++; | |
3410 | ||
3411 | assert(PL_tmps_ix + nargs < PL_tmps_max); | |
3645bb38 DM |
3412 | #ifdef DEBUGGING |
3413 | /* PADTMPs with container set magic shouldn't appear in the | |
3414 | * wild. This assert is more important for pp_leavesublv(), | |
3415 | * but by testing for it here, we're more likely to catch | |
3416 | * bad cases (what with :lvalue subs not being widely | |
3417 | * deployed). The two issues are that for something like | |
3418 | * sub :lvalue { $tied{foo} } | |
3419 | * or | |
3420 | * sub :lvalue { substr($foo,1,2) } | |
3421 | * pp_leavesublv() will croak if the sub returns a PADTMP, | |
3422 | * and currently functions like pp_substr() return a mortal | |
3423 | * rather than using their PADTMP when returning a PVLV. | |
3424 | * This is because the PVLV will hold a ref to $foo, | |
3425 | * so $foo would get delayed in being freed while | |
3426 | * the PADTMP SV remained in the PAD. | |
3427 | * So if this assert fails it means either: | |
3428 | * 1) there is pp code similar to pp_substr that is | |
3429 | * returning a PADTMP instead of a mortal, and probably | |
3430 | * needs fixing, or | |
5d9c1c9a | 3431 | * 2) pp_leavesublv is making unwarranted assumptions |
3645bb38 DM |
3432 | * about always croaking on a PADTMP |
3433 | */ | |
3434 | if (SvPADTMP(sv) && SvSMAGICAL(sv)) { | |
3435 | MAGIC *mg; | |
3436 | for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) { | |
3437 | assert(PERL_MAGIC_TYPE_IS_VALUE_MAGIC(mg->mg_type)); | |
3438 | } | |
3439 | } | |
3440 | #endif | |
f7a874b8 | 3441 | |
799da9d7 DM |
3442 | if ( |
3443 | pass == 0 ? (SvTEMP(sv) && !SvMAGICAL(sv) && SvREFCNT(sv) == 1) | |
3444 | : pass == 1 ? ((SvTEMP(sv) || SvPADTMP(sv)) && !SvMAGICAL(sv) && SvREFCNT(sv) == 1) | |
3445 | : pass == 2 ? (!SvPADTMP(sv)) | |
3446 | : 1) | |
3447 | { | |
3448 | /* pass through: skip copy for logic or optimisation | |
3449 | * reasons; instead mortalise it, except that ... */ | |
e02ce34b | 3450 | *++to_sp = sv; |
f7a874b8 | 3451 | |
799da9d7 DM |
3452 | if (SvTEMP(sv)) { |
3453 | /* ... since this SV is an SvTEMP , we don't need to | |
3454 | * re-mortalise it; instead we just need to ensure | |
3455 | * that its existing entry in the temps stack frame | |
3456 | * ends up below the cut and so avoids being freed | |
3457 | * this time round. We mark it as needing to be kept | |
3458 | * by temporarily unsetting SvTEMP; then at the end, | |
3459 | * we shuffle any !SvTEMP entries on the tmps stack | |
3460 | * back below the cut. | |
3461 | * However, there's a significant chance that there's | |
3462 | * a 1:1 correspondence between the first few (or all) | |
3463 | * elements in the return args stack frame and those | |
3464 | * in the temps stack frame; e,g.: | |
3465 | * sub f { ....; map {...} .... }, | |
3466 | * or if we're exiting multiple scopes and one of the | |
3467 | * inner scopes has already made mortal copies of each | |
3468 | * return arg. | |
3469 | * | |
3470 | * If so, this arg sv will correspond to the next item | |
3471 | * on the tmps stack above the cut, and so can be kept | |
3472 | * merely by moving the cut boundary up one, rather | |
3473 | * than messing with SvTEMP. If all args are 1:1 then | |
3474 | * we can avoid the sorting stage below completely. | |
977d0c81 DM |
3475 | * |
3476 | * If there are no items above the cut on the tmps | |
3477 | * stack, then the SvTEMP must comne from an item | |
3478 | * below the cut, so there's nothing to do. | |
799da9d7 | 3479 | */ |
977d0c81 DM |
3480 | if (tmps_basep <= &PL_tmps_stack[PL_tmps_ix]) { |
3481 | if (sv == *tmps_basep) | |
3482 | tmps_basep++; | |
3483 | else | |
3484 | SvTEMP_off(sv); | |
3485 | } | |
799da9d7 | 3486 | } |
75bc488d | 3487 | else if (!SvPADTMP(sv)) { |
799da9d7 | 3488 | /* mortalise arg to avoid it being freed during save |
75bc488d | 3489 | * stack unwinding. Pad tmps don't need mortalising as |
977d0c81 DM |
3490 | * they're never freed. This is the equivalent of |
3491 | * sv_2mortal(SvREFCNT_inc(sv)), except that: | |
799da9d7 DM |
3492 | * * it assumes that the temps stack has already been |
3493 | * extended; | |
3494 | * * it puts the new item at the cut rather than at | |
3495 | * ++PL_tmps_ix, moving the previous occupant there | |
3496 | * instead. | |
3497 | */ | |
3498 | if (!SvIMMORTAL(sv)) { | |
977d0c81 | 3499 | SvREFCNT_inc_simple_void_NN(sv); |
799da9d7 | 3500 | SvTEMP_on(sv); |
977d0c81 DM |
3501 | /* Note that if there's nothing above the cut, |
3502 | * this copies the garbage one slot above | |
3503 | * PL_tmps_ix onto itself. This is harmless (the | |
3504 | * stack's already been extended), but might in | |
3505 | * theory trigger warnings from tools like ASan | |
3506 | */ | |
799da9d7 DM |
3507 | PL_tmps_stack[++PL_tmps_ix] = *tmps_basep; |
3508 | *tmps_basep++ = sv; | |
3509 | } | |
3510 | } | |
f7a874b8 DM |
3511 | } |
3512 | else { | |
3513 | /* Make a mortal copy of the SV. | |
3514 | * The following code is the equivalent of sv_mortalcopy() | |
3515 | * except that: | |
3516 | * * it assumes the temps stack has already been extended; | |
3517 | * * it optimises the copying for some simple SV types; | |
3518 | * * it puts the new item at the cut rather than at | |
3519 | * ++PL_tmps_ix, moving the previous occupant there | |
3520 | * instead. | |
3521 | */ | |
3522 | SV *newsv = newSV(0); | |
3523 | ||
3524 | PL_tmps_stack[++PL_tmps_ix] = *tmps_basep; | |
3525 | /* put it on the tmps stack early so it gets freed if we die */ | |
3526 | *tmps_basep++ = newsv; | |
e02ce34b | 3527 | *++to_sp = newsv; |
f7a874b8 DM |
3528 | |
3529 | if (SvTYPE(sv) <= SVt_IV) { | |
3530 | /* arg must be one of undef, IV/UV, or RV: skip | |
3531 | * sv_setsv_flags() and do the copy directly */ | |
3532 | U32 dstflags; | |
3533 | U32 srcflags = SvFLAGS(sv); | |
3534 | ||
3535 | assert(!SvGMAGICAL(sv)); | |
3536 | if (srcflags & (SVf_IOK|SVf_ROK)) { | |
3537 | SET_SVANY_FOR_BODYLESS_IV(newsv); | |
3538 | ||
3539 | if (srcflags & SVf_ROK) { | |
3540 | newsv->sv_u.svu_rv = SvREFCNT_inc(SvRV(sv)); | |
3541 | /* SV type plus flags */ | |
3542 | dstflags = (SVt_IV|SVf_ROK|SVs_TEMP); | |
3543 | } | |
3544 | else { | |
3545 | /* both src and dst are <= SVt_IV, so sv_any | |
3546 | * points to the head; so access the heads | |
3547 | * directly rather than going via sv_any. | |
3548 | */ | |
3549 | assert( &(sv->sv_u.svu_iv) | |
3550 | == &(((XPVIV*) SvANY(sv))->xiv_iv)); | |
3551 | assert( &(newsv->sv_u.svu_iv) | |
3552 | == &(((XPVIV*) SvANY(newsv))->xiv_iv)); | |
3553 | newsv->sv_u.svu_iv = sv->sv_u.svu_iv; | |
3554 | /* SV type plus flags */ | |
3555 | dstflags = (SVt_IV|SVf_IOK|SVp_IOK|SVs_TEMP | |
3556 | |(srcflags & SVf_IVisUV)); | |
3557 | } | |
3558 | } | |
3559 | else { | |
3560 | assert(!(srcflags & SVf_OK)); | |
3561 | dstflags = (SVt_NULL|SVs_TEMP); /* SV type plus flags */ | |
3562 | } | |
3563 | SvFLAGS(newsv) = dstflags; | |
3564 | ||
3565 | } | |
3566 | else { | |
3567 | /* do the full sv_setsv() */ | |
3568 | SSize_t old_base; | |
3569 | ||
3570 | SvTEMP_on(newsv); | |
3571 | old_base = tmps_basep - PL_tmps_stack; | |
3572 | SvGETMAGIC(sv); | |
3573 | sv_setsv_flags(newsv, sv, SV_DO_COW_SVSETSV); | |
799da9d7 | 3574 | /* the mg_get or sv_setsv might have created new temps |
f7a874b8 DM |
3575 | * or realloced the tmps stack; regrow and reload */ |
3576 | EXTEND_MORTAL(nargs); | |
3577 | tmps_basep = PL_tmps_stack + old_base; | |
3578 | TAINT_NOT; /* Each item is independent */ | |
3579 | } | |
3580 | ||
3581 | } | |
3582 | } while (--nargs); | |
3583 | ||
3584 | /* If there are any temps left above the cut, we need to sort | |
3585 | * them into those to keep and those to free. The only ones to | |
3586 | * keep are those for which we've temporarily unset SvTEMP. | |
3587 | * Work inwards from the two ends at tmps_basep .. PL_tmps_ix, | |
3588 | * swapping pairs as necessary. Stop when we meet in the middle. | |
3589 | */ | |
3590 | { | |
3591 | SV **top = PL_tmps_stack + PL_tmps_ix; | |
3592 | while (tmps_basep <= top) { | |
3593 | SV *sv = *top; | |
3594 | if (SvTEMP(sv)) | |
3595 | top--; | |
3596 | else { | |
3597 | SvTEMP_on(sv); | |
3598 | *top = *tmps_basep; | |
3599 | *tmps_basep = sv; | |
3600 | tmps_basep++; | |
3601 | } | |
3602 | } | |
3603 | } | |
3604 | ||
3605 | tmps_base = tmps_basep - PL_tmps_stack; | |
3606 | } | |
3607 | ||
e02ce34b | 3608 | PL_stack_sp = to_sp; |
f7a874b8 DM |
3609 | |
3610 | /* unrolled FREETMPS() but using tmps_base-1 rather than PL_tmps_floor */ | |
3611 | while (PL_tmps_ix >= tmps_base) { | |
3612 | SV* const sv = PL_tmps_stack[PL_tmps_ix--]; | |
3613 | #ifdef PERL_POISON | |
3614 | PoisonWith(PL_tmps_stack + PL_tmps_ix + 1, 1, SV *, 0xAB); | |
3615 | #endif | |
3616 | if (LIKELY(sv)) { | |
3617 | SvTEMP_off(sv); | |
3618 | SvREFCNT_dec_NN(sv); /* note, can modify tmps_ix!!! */ | |
3619 | } | |
3620 | } | |
3621 | } | |
3622 | ||
3623 | ||
c349b9a0 DM |
3624 | /* also tail-called by pp_return */ |
3625 | ||
f7a874b8 DM |
3626 | PP(pp_leavesub) |
3627 | { | |
1c23e2bd | 3628 | U8 gimme; |
eb578fdb | 3629 | PERL_CONTEXT *cx; |
f7a874b8 | 3630 | SV **oldsp; |
5da525e9 | 3631 | OP *retop; |
a0d0e21e | 3632 | |
4ebe6e95 | 3633 | cx = CX_CUR(); |
61d3b95a DM |
3634 | assert(CxTYPE(cx) == CXt_SUB); |
3635 | ||
3636 | if (CxMULTICALL(cx)) { | |
1f0ba93b DM |
3637 | /* entry zero of a stack is always PL_sv_undef, which |
3638 | * simplifies converting a '()' return into undef in scalar context */ | |
3639 | assert(PL_stack_sp > PL_stack_base || *PL_stack_base == &PL_sv_undef); | |
9850bf21 | 3640 | return 0; |
1f0ba93b | 3641 | } |
9850bf21 | 3642 | |
61d3b95a | 3643 | gimme = cx->blk_gimme; |
f7a874b8 | 3644 | oldsp = PL_stack_base + cx->blk_oldsp; /* last arg of previous frame */ |
1c846c1f | 3645 | |
f7a874b8 DM |
3646 | if (gimme == G_VOID) |
3647 | PL_stack_sp = oldsp; | |
3648 | else | |
e02ce34b | 3649 | leave_adjust_stacks(oldsp, oldsp, gimme, 0); |
1c846c1f | 3650 | |
2f450c1b | 3651 | CX_LEAVE_SCOPE(cx); |
a73d8813 | 3652 | cx_popsub(cx); /* Stack values are safe: release CV and @_ ... */ |
ed8ff0f3 | 3653 | cx_popblock(cx); |
5da525e9 DM |
3654 | retop = cx->blk_sub.retop; |
3655 | CX_POP(cx); | |
a0d0e21e | 3656 | |
5da525e9 | 3657 | return retop; |
a0d0e21e LW |
3658 | } |
3659 | ||
6e45d846 DM |
3660 | |
3661 | /* clear (if possible) or abandon the current @_. If 'abandon' is true, | |
3662 | * forces an abandon */ | |
3663 | ||
3664 | void | |
3665 | Perl_clear_defarray(pTHX_ AV* av, bool abandon) | |
3666 | { | |
3667 | const SSize_t fill = AvFILLp(av); | |
3668 | ||
3669 | PERL_ARGS_ASSERT_CLEAR_DEFARRAY; | |
3670 | ||
656457d0 | 3671 | if (LIKELY(!abandon && SvREFCNT(av) == 1 && !SvMAGICAL(av))) { |
c3d969bf | 3672 | av_clear(av); |
656457d0 DM |
3673 | AvREIFY_only(av); |
3674 | } | |
c3d969bf | 3675 | else { |
656457d0 DM |
3676 | AV *newav = newAV(); |
3677 | av_extend(newav, fill); | |
3678 | AvREIFY_only(newav); | |
3679 | PAD_SVl(0) = MUTABLE_SV(newav); | |
c3d969bf | 3680 | SvREFCNT_dec_NN(av); |
c3d969bf | 3681 | } |
6e45d846 DM |
3682 | } |
3683 | ||
3684 | ||
a0d0e21e LW |
3685 | PP(pp_entersub) |
3686 | { | |
20b7effb | 3687 | dSP; dPOPss; |
a0d0e21e | 3688 | GV *gv; |
eb578fdb KW |
3689 | CV *cv; |
3690 | PERL_CONTEXT *cx; | |
8ae997c5 | 3691 | I32 old_savestack_ix; |
a0d0e21e | 3692 | |
f5719c02 | 3693 | if (UNLIKELY(!sv)) |
1ff56747 DM |
3694 | goto do_die; |
3695 | ||
3696 | /* Locate the CV to call: | |
3697 | * - most common case: RV->CV: f(), $ref->(): | |
3698 | * note that if a sub is compiled before its caller is compiled, | |
3699 | * the stash entry will be a ref to a CV, rather than being a GV. | |
3700 | * - second most common case: CV: $ref->method() | |
3701 | */ | |
3702 | ||
3703 | /* a non-magic-RV -> CV ? */ | |
3704 | if (LIKELY( (SvFLAGS(sv) & (SVf_ROK|SVs_GMG)) == SVf_ROK)) { | |
3705 | cv = MUTABLE_CV(SvRV(sv)); | |
3706 | if (UNLIKELY(SvOBJECT(cv))) /* might be overloaded */ | |
3707 | goto do_ref; | |
3708 | } | |
3709 | else | |
3710 | cv = MUTABLE_CV(sv); | |
3711 | ||
3712 | /* a CV ? */ | |
3713 | if (UNLIKELY(SvTYPE(cv) != SVt_PVCV)) { | |
3714 | /* handle all the weird cases */ | |
313107ce | 3715 | switch (SvTYPE(sv)) { |
1ff56747 DM |
3716 | case SVt_PVLV: |
3717 | if (!isGV_with_GP(sv)) | |
3718 | goto do_default; | |
3719 | /* FALLTHROUGH */ | |
313107ce | 3720 | case SVt_PVGV: |
1ff56747 DM |
3721 | cv = GvCVu((const GV *)sv); |
3722 | if (UNLIKELY(!cv)) { | |
313107ce DM |
3723 | HV *stash; |
3724 | cv = sv_2cv(sv, &stash, &gv, 0); | |
1ff56747 DM |
3725 | if (!cv) { |
3726 | old_savestack_ix = PL_savestack_ix; | |
3727 | goto try_autoload; | |
3728 | } | |
313107ce DM |
3729 | } |
3730 | break; | |
1ff56747 | 3731 | |
313107ce | 3732 | default: |
1ff56747 | 3733 | do_default: |
313107ce DM |
3734 | SvGETMAGIC(sv); |
3735 | if (SvROK(sv)) { | |
1ff56747 DM |
3736 | do_ref: |
3737 | if (UNLIKELY(SvAMAGIC(sv))) { | |
313107ce DM |
3738 | sv = amagic_deref_call(sv, to_cv_amg); |
3739 | /* Don't SPAGAIN here. */ | |
3740 | } | |
3741 | } | |
3742 | else { | |
3743 | const char *sym; | |
3744 | STRLEN len; | |
1ff56747 | 3745 | if (UNLIKELY(!SvOK(sv))) |
313107ce | 3746 | DIE(aTHX_ PL_no_usym, "a subroutine"); |
1ff56747 DM |
3747 | |
3748 | if (UNLIKELY(sv == &PL_sv_yes)) { /* unfound import, ignore */ | |
44dd5d49 | 3749 | if (PL_op->op_flags & OPf_STACKED) /* hasargs */ |
1ff56747 DM |
3750 | SP = PL_stack_base + POPMARK; |
3751 | else | |
3752 | (void)POPMARK; | |
3753 | if (GIMME_V == G_SCALAR) | |
3754 | PUSHs(&PL_sv_undef); | |
3755 | RETURN; | |
3756 | } | |
3757 | ||
313107ce DM |
3758 | sym = SvPV_nomg_const(sv, len); |
3759 | if (PL_op->op_private & HINT_STRICT_REFS) | |
3760 | DIE(aTHX_ "Can't use string (\"%" SVf32 "\"%s) as a subroutine ref while \"strict refs\" in use", sv, len>32 ? "..." : ""); | |
3761 | cv = get_cvn_flags(sym, len, GV_ADD|SvUTF8(sv)); | |
3762 | break; | |
3763 | } | |
3764 | cv = MUTABLE_CV(SvRV(sv)); | |
1ff56747 | 3765 | if (LIKELY(SvTYPE(cv) == SVt_PVCV)) |
313107ce | 3766 | break; |
924ba076 | 3767 | /* FALLTHROUGH */ |
313107ce DM |
3768 | case SVt_PVHV: |
3769 | case SVt_PVAV: | |
1ff56747 | 3770 | do_die: |
313107ce | 3771 | DIE(aTHX_ "Not a CODE reference"); |
313107ce | 3772 | } |
f5719c02 | 3773 | } |
a0d0e21e | 3774 | |
8ae997c5 | 3775 | /* At this point we want to save PL_savestack_ix, either by doing a |
a73d8813 | 3776 | * cx_pushsub(), or for XS, doing an ENTER. But we don't yet know the final |
8ae997c5 | 3777 | * CV we will be using (so we don't know whether its XS, so we can't |
a73d8813 | 3778 | * cx_pushsub() or ENTER yet), and determining cv may itself push stuff on |
8ae997c5 DM |
3779 | * the save stack. So remember where we are currently on the save |
3780 | * stack, and later update the CX or scopestack entry accordingly. */ | |
3781 | old_savestack_ix = PL_savestack_ix; | |
a0d0e21e | 3782 | |
f29834c6 DM |
3783 | /* these two fields are in a union. If they ever become separate, |
3784 | * we have to test for both of them being null below */ | |
9a28816a | 3785 | assert(cv); |
f29834c6 DM |
3786 | assert((void*)&CvROOT(cv) == (void*)&CvXSUB(cv)); |
3787 | while (UNLIKELY(!CvROOT(cv))) { | |
2f349aa0 NC |
3788 | GV* autogv; |
3789 | SV* sub_name; | |
3790 | ||
3791 | /* anonymous or undef'd function leaves us no recourse */ | |
ae77754a FC |
3792 | if (CvLEXICAL(cv) && CvHASGV(cv)) |
3793 | DIE(aTHX_ "Undefined subroutine &%"SVf" called", | |
ecf05a58 | 3794 | SVfARG(cv_name(cv, NULL, 0))); |
ae77754a | 3795 | if (CvANON(cv) || !CvHASGV(cv)) { |
2f349aa0 | 3796 | DIE(aTHX_ "Undefined subroutine called"); |
7d2057d8 | 3797 | } |
2f349aa0 NC |
3798 | |
3799 | /* autoloaded stub? */ | |
ae77754a | 3800 | if (cv != GvCV(gv = CvGV(cv))) { |
2f349aa0 NC |
3801 | cv = GvCV(gv); |
3802 | } | |
3803 | /* should call AUTOLOAD now? */ | |
3804 | else { | |
7b52d656 | 3805 | try_autoload: |
b4b431d9 | 3806 | autogv = gv_autoload_pvn(GvSTASH(gv), GvNAME(gv), GvNAMELEN(gv), |
1de22db2 FC |
3807 | (GvNAMEUTF8(gv) ? SVf_UTF8 : 0) |
3808 | |(PL_op->op_flags & OPf_REF | |
3809 | ? GV_AUTOLOAD_ISMETHOD | |
3810 | : 0)); | |
b4b431d9 | 3811 | cv = autogv ? GvCV(autogv) : NULL; |
2f349aa0 | 3812 | } |
b4b431d9 DM |
3813 | if (!cv) { |
3814 | sub_name = sv_newmortal(); | |
3815 | gv_efullname3(sub_name, gv, NULL); | |
3816 | DIE(aTHX_ "Undefined subroutine &%"SVf" called", SVfARG(sub_name)); | |
3817 | } | |
a0d0e21e LW |
3818 | } |
3819 | ||
4f25d042 DM |
3820 | /* unrolled "CvCLONE(cv) && ! CvCLONED(cv)" */ |
3821 | if (UNLIKELY((CvFLAGS(cv) & (CVf_CLONE|CVf_CLONED)) == CVf_CLONE)) | |
654c6d71 DM |
3822 | DIE(aTHX_ "Closure prototype called"); |
3823 | ||
f5719c02 DM |
3824 | if (UNLIKELY((PL_op->op_private & OPpENTERSUB_DB) && GvCV(PL_DBsub) |
3825 | && !CvNODEBUG(cv))) | |
3826 | { | |
005a8a35 | 3827 | Perl_get_db_sub(aTHX_ &sv, cv); |
a9ef256d NC |
3828 | if (CvISXSUB(cv)) |
3829 | PL_curcopdb = PL_curcop; | |
1ad62f64 BR |
3830 | if (CvLVALUE(cv)) { |
3831 | /* check for lsub that handles lvalue subroutines */ | |
07b605e5 | 3832 | cv = GvCV(gv_fetchpvs("DB::lsub", GV_ADDMULTI, SVt_PVCV)); |
1ad62f64 BR |
3833 | /* if lsub not found then fall back to DB::sub */ |
3834 | if (!cv) cv = GvCV(PL_DBsub); | |
3835 | } else { | |
3836 | cv = GvCV(PL_DBsub); | |
3837 | } | |
a9ef256d | 3838 | |
ccafdc96 RGS |
3839 | if (!cv || (!CvXSUB(cv) && !CvSTART(cv))) |
3840 | DIE(aTHX_ "No DB::sub routine defined"); | |
67caa1fe | 3841 | } |
a0d0e21e | 3842 | |
aed2304a | 3843 | if (!(CvISXSUB(cv))) { |
f1025168 | 3844 | /* This path taken at least 75% of the time */ |
a0d0e21e | 3845 | dMARK; |
c53244ca | 3846 | PADLIST *padlist; |
3689ad62 | 3847 | I32 depth; |
44dd5d49 | 3848 | bool hasargs; |
1c23e2bd | 3849 | U8 gimme; |
f5719c02 | 3850 | |
20448bad DM |
3851 | /* keep PADTMP args alive throughout the call (we need to do this |
3852 | * because @_ isn't refcounted). Note that we create the mortals | |
3853 | * in the caller's tmps frame, so they won't be freed until after | |
3854 | * we return from the sub. | |
3855 | */ | |
91bab027 | 3856 | { |
20448bad DM |
3857 | SV **svp = MARK; |
3858 | while (svp < SP) { | |
3859 | SV *sv = *++svp; | |
3860 | if (!sv) | |
3861 | continue; | |
3862 | if (SvPADTMP(sv)) | |
3863 | *svp = sv = sv_mortalcopy(sv); | |
3864 | SvTEMP_off(sv); | |
3865 | } | |
3866 | } | |
3867 | ||
801bbf61 | 3868 | gimme = GIMME_V; |
ed8ff0f3 | 3869 | cx = cx_pushblock(CXt_SUB, gimme, MARK, old_savestack_ix); |
44dd5d49 | 3870 | hasargs = cBOOL(PL_op->op_flags & OPf_STACKED); |
a73d8813 | 3871 | cx_pushsub(cx, cv, PL_op->op_next, hasargs); |
8ae997c5 | 3872 | |
c53244ca | 3873 | padlist = CvPADLIST(cv); |
d2af2719 | 3874 | if (UNLIKELY((depth = ++CvDEPTH(cv)) >= 2)) |
3689ad62 | 3875 | pad_push(padlist, depth); |
3689ad62 | 3876 | PAD_SET_CUR_NOSAVE(padlist, depth); |
f5719c02 | 3877 | if (LIKELY(hasargs)) { |
10533ace | 3878 | AV *const av = MUTABLE_AV(PAD_SVl(0)); |
bdf02c57 DM |
3879 | SSize_t items; |
3880 | AV **defavp; | |
3881 | ||
bdf02c57 DM |
3882 | defavp = &GvAV(PL_defgv); |
3883 | cx->blk_sub.savearray = *defavp; | |
3884 | *defavp = MUTABLE_AV(SvREFCNT_inc_simple_NN(av)); | |
a0d0e21e | 3885 | |
72f28af4 DM |
3886 | /* it's the responsibility of whoever leaves a sub to ensure |
3887 | * that a clean, empty AV is left in pad[0]. This is normally | |
a73d8813 | 3888 | * done by cx_popsub() */ |
72f28af4 DM |
3889 | assert(!AvREAL(av) && AvFILLp(av) == -1); |
3890 | ||
3891 | items = SP - MARK; | |
f5719c02 | 3892 | if (UNLIKELY(items - 1 > AvMAX(av))) { |
77d27ef6 SF |
3893 | SV **ary = AvALLOC(av); |
3894 | AvMAX(av) = items - 1; | |
3895 | Renew(ary, items, SV*); | |
3896 | AvALLOC(av) = ary; | |
3897 | AvARRAY(av) = ary; | |
3898 | } | |
3899 | ||
bdf02c57 | 3900 | Copy(MARK+1,AvARRAY(av),items,SV*); |
93965878 | 3901 | AvFILLp(av) = items - 1; |
a0d0e21e | 3902 | } |
f5719c02 DM |
3903 | if (UNLIKELY((cx->blk_u16 & OPpENTERSUB_LVAL_MASK) == OPpLVAL_INTRO && |
3904 | !CvLVALUE(cv))) | |
0f948285 DIM |
3905 | DIE(aTHX_ "Can't modify non-lvalue subroutine call of &%"SVf, |
3906 | SVfARG(cv_name(cv, NULL, 0))); | |
4a925ff6 GS |
3907 | /* warning must come *after* we fully set up the context |
3908 | * stuff so that __WARN__ handlers can safely dounwind() | |
3909 | * if they want to | |
3910 | */ | |
3689ad62 | 3911 | if (UNLIKELY(depth == PERL_SUB_DEPTH_WARN |
f5719c02 DM |
3912 | && ckWARN(WARN_RECURSION) |
3913 | && !(PERLDB_SUB && cv == GvCV(PL_DBsub)))) | |
4a925ff6 | 3914 | sub_crush_depth(cv); |
a0d0e21e LW |
3915 | RETURNOP(CvSTART(cv)); |
3916 | } | |
f1025168 | 3917 | else { |
de935cc9 | 3918 | SSize_t markix = TOPMARK; |
71d19c37 | 3919 | bool is_scalar; |
f1025168 | 3920 | |
8ae997c5 DM |
3921 | ENTER; |
3922 | /* pretend we did the ENTER earlier */ | |
3923 | PL_scopestack[PL_scopestack_ix - 1] = old_savestack_ix; | |
3924 | ||
b479c9f2 | 3925 | SAVETMPS; |
3a76ca88 | 3926 | PUTBACK; |
f1025168 | 3927 | |
f5719c02 | 3928 | if (UNLIKELY(((PL_op->op_private |
490576d1 | 3929 | & CX_PUSHSUB_GET_LVALUE_MASK(Perl_is_lvalue_sub) |
4587c532 | 3930 | ) & OPpENTERSUB_LVAL_MASK) == OPpLVAL_INTRO && |
f5719c02 | 3931 | !CvLVALUE(cv))) |
0f948285 DIM |
3932 | DIE(aTHX_ "Can't modify non-lvalue subroutine call of &%"SVf, |
3933 | SVfARG(cv_name(cv, NULL, 0))); | |
4587c532 | 3934 | |
44dd5d49 | 3935 | if (UNLIKELY(!(PL_op->op_flags & OPf_STACKED) && GvAV(PL_defgv))) { |
3a76ca88 RGS |
3936 | /* Need to copy @_ to stack. Alternative may be to |
3937 | * switch stack to @_, and copy return values | |
3938 | * back. This would allow popping @_ in XSUB, e.g.. XXXX */ | |
3939 | AV * const av = GvAV(PL_defgv); | |
ad39f3a2 | 3940 | const SSize_t items = AvFILL(av) + 1; |
3a76ca88 RGS |
3941 | |
3942 | if (items) { | |
dd2a7f90 | 3943 | SSize_t i = 0; |
ad39f3a2 | 3944 | const bool m = cBOOL(SvRMAGICAL(av)); |
3a76ca88 RGS |
3945 | /* Mark is at the end of the stack. */ |
3946 | EXTEND(SP, items); | |
dd2a7f90 | 3947 | for (; i < items; ++i) |
ad39f3a2 FC |
3948 | { |
3949 | SV *sv; | |
3950 | if (m) { | |
3951 | SV ** const svp = av_fetch(av, i, 0); | |
3952 | sv = svp ? *svp : NULL; | |
3953 | } | |
3954 | else sv = AvARRAY(av)[i]; | |
3955 | if (sv) SP[i+1] = sv; | |
dd2a7f90 | 3956 | else { |
199f858d | 3957 | SP[i+1] = newSVavdefelem(av, i, 1); |
dd2a7f90 | 3958 | } |
ad39f3a2 | 3959 | } |
3a76ca88 RGS |
3960 | SP += items; |
3961 | PUTBACK ; | |
3962 | } | |
3963 | } | |
3455055f FC |
3964 | else { |
3965 | SV **mark = PL_stack_base + markix; | |
de935cc9 | 3966 | SSize_t items = SP - mark; |
3455055f FC |
3967 | while (items--) { |
3968 | mark++; | |
60779a30 | 3969 | if (*mark && SvPADTMP(*mark)) { |
3455055f | 3970 | *mark = sv_mortalcopy(*mark); |
60779a30 | 3971 | } |
3455055f FC |
3972 | } |
3973 | } | |
3a76ca88 | 3974 | /* We assume first XSUB in &DB::sub is the called one. */ |
f5719c02 | 3975 | if (UNLIKELY(PL_curcopdb)) { |
3a76ca88 RGS |
3976 | SAVEVPTR(PL_curcop); |
3977 | PL_curcop = PL_curcopdb; | |
3978 | PL_curcopdb = NULL; | |
3979 | } | |
3980 | /* Do we need to open block here? XXXX */ | |
72df79cf | 3981 | |
71d19c37 DM |
3982 | /* calculate gimme here as PL_op might get changed and then not |
3983 | * restored until the LEAVE further down */ | |
3984 | is_scalar = (GIMME_V == G_SCALAR); | |
3985 | ||
72df79cf GF |
3986 | /* CvXSUB(cv) must not be NULL because newXS() refuses NULL xsub address */ |
3987 | assert(CvXSUB(cv)); | |
16c91539 | 3988 | CvXSUB(cv)(aTHX_ cv); |
3a76ca88 RGS |
3989 | |
3990 | /* Enforce some sanity in scalar context. */ | |
71d19c37 | 3991 | if (is_scalar) { |
89a18b40 DM |
3992 | SV **svp = PL_stack_base + markix + 1; |
3993 | if (svp != PL_stack_sp) { | |
3994 | *svp = svp > PL_stack_sp ? &PL_sv_undef : *PL_stack_sp; | |
3995 | PL_stack_sp = svp; | |
3996 | } | |
3a76ca88 | 3997 | } |
a57c6685 | 3998 | LEAVE; |
f1025168 NC |
3999 | return NORMAL; |
4000 | } | |
a0d0e21e LW |
4001 | } |
4002 | ||
44a8e56a | 4003 | void |
864dbfa3 | 4004 | Perl_sub_crush_depth(pTHX_ CV *cv) |
44a8e56a | 4005 | { |
7918f24d NC |
4006 | PERL_ARGS_ASSERT_SUB_CRUSH_DEPTH; |
4007 | ||
44a8e56a | 4008 | if (CvANON(cv)) |
9014280d | 4009 | Perl_warner(aTHX_ packWARN(WARN_RECURSION), "Deep recursion on anonymous subroutine"); |
44a8e56a | 4010 | else { |
35c1215d | 4011 | Perl_warner(aTHX_ packWARN(WARN_RECURSION), "Deep recursion on subroutine \"%"SVf"\"", |
ecf05a58 | 4012 | SVfARG(cv_name(cv,NULL,0))); |
44a8e56a | 4013 | } |
4014 | } | |
4015 | ||
4fa06845 DM |
4016 | |
4017 | ||
4018 | /* like croak, but report in context of caller */ | |
4019 | ||
4020 | void | |
4021 | Perl_croak_caller(const char *pat, ...) | |
4022 | { | |
4023 | dTHX; | |
4024 | va_list args; | |
4025 | const PERL_CONTEXT *cx = caller_cx(0, NULL); | |
4026 | ||
4027 | /* make error appear at call site */ | |
4028 | assert(cx); | |
4029 | PL_curcop = cx->blk_oldcop; | |
4030 | ||
4031 | va_start(args, pat); | |
4032 | vcroak(pat, &args); | |
4033 | NOT_REACHED; /* NOTREACHED */ | |
4034 | va_end(args); | |
4035 | } | |
4036 | ||
4037 | ||
a0d0e21e LW |
4038 | PP(pp_aelem) |
4039 | { | |
20b7effb | 4040 | dSP; |
a0d0e21e | 4041 | SV** svp; |
a3b680e6 | 4042 | SV* const elemsv = POPs; |
d804643f | 4043 | IV elem = SvIV(elemsv); |
502c6561 | 4044 | AV *const av = MUTABLE_AV(POPs); |
e1ec3a88 | 4045 | const U32 lval = PL_op->op_flags & OPf_MOD || LVRET; |
bbfdc870 | 4046 | const U32 defer = PL_op->op_private & OPpLVAL_DEFER; |
4ad10a0b VP |
4047 | const bool localizing = PL_op->op_private & OPpLVAL_INTRO; |
4048 | bool preeminent = TRUE; | |
be6c24e0 | 4049 | SV *sv; |
a0d0e21e | 4050 | |
5d9574c1 | 4051 | if (UNLIKELY(SvROK(elemsv) && !SvGAMAGIC(elemsv) && ckWARN(WARN_MISC))) |
95b63a38 JH |
4052 | Perl_warner(aTHX_ packWARN(WARN_MISC), |
4053 | "Use of reference \"%"SVf"\" as array index", | |
be2597df | 4054 | SVfARG(elemsv)); |
5d9574c1 | 4055 | if (UNLIKELY(SvTYPE(av) != SVt_PVAV)) |
a0d0e21e | 4056 | RETPUSHUNDEF; |
4ad10a0b | 4057 | |
5d9574c1 | 4058 | if (UNLIKELY(localizing)) { |
4ad10a0b VP |
4059 | MAGIC *mg; |
4060 | HV *stash; | |
4061 | ||
4062 | /* If we can determine whether the element exist, | |
4063 | * Try to preserve the existenceness of a tied array | |
4064 | * element by using EXISTS and DELETE if possible. | |
4065 | * Fallback to FETCH and STORE otherwise. */ | |
4066 | if (SvCANEXISTDELETE(av)) | |
4067 | preeminent = av_exists(av, elem); | |
4068 | } | |
4069 | ||
68dc0745 | 4070 | svp = av_fetch(av, elem, lval && !defer); |
a0d0e21e | 4071 | if (lval) { |
2b573ace | 4072 | #ifdef PERL_MALLOC_WRAP |
2b573ace | 4073 | if (SvUOK(elemsv)) { |
a9c4fd4e | 4074 | const UV uv = SvUV(elemsv); |
2b573ace JH |
4075 | elem = uv > IV_MAX ? IV_MAX : uv; |
4076 | } | |
4077 | else if (SvNOK(elemsv)) | |
4078 | elem = (IV)SvNV(elemsv); | |
a3b680e6 AL |
4079 | if (elem > 0) { |
4080 | static const char oom_array_extend[] = | |
4081 | "Out of memory during array extend"; /* Duplicated in av.c */ | |
2b573ace | 4082 | MEM_WRAP_CHECK_1(elem,SV*,oom_array_extend); |
a3b680e6 | 4083 | } |
2b573ace | 4084 | #endif |
ce0d59fd | 4085 | if (!svp || !*svp) { |
bbfdc870 | 4086 | IV len; |
68dc0745 | 4087 | if (!defer) |
cea2e8a9 | 4088 | DIE(aTHX_ PL_no_aelem, elem); |
b9f2b683 | 4089 | len = av_tindex(av); |
199f858d | 4090 | mPUSHs(newSVavdefelem(av, |
bbfdc870 FC |
4091 | /* Resolve a negative index now, unless it points before the |
4092 | beginning of the array, in which case record it for error | |
4093 | reporting in magic_setdefelem. */ | |
199f858d FC |
4094 | elem < 0 && len + elem >= 0 ? len + elem : elem, |
4095 | 1)); | |
68dc0745 | 4096 | RETURN; |
4097 | } | |
5d9574c1 | 4098 | if (UNLIKELY(localizing)) { |
4ad10a0b VP |
4099 | if (preeminent) |
4100 | save_aelem(av, elem, svp); | |
4101 | else | |
4102 | SAVEADELETE(av, elem); | |
4103 | } | |
9026059d GG |
4104 | else if (PL_op->op_private & OPpDEREF) { |
4105 | PUSHs(vivify_ref(*svp, PL_op->op_private & OPpDEREF)); | |
4106 | RETURN; | |
4107 | } | |
a0d0e21e | 4108 | } |
3280af22 | 4109 | sv = (svp ? *svp : &PL_sv_undef); |
39cf747a | 4110 | if (!lval && SvRMAGICAL(av) && SvGMAGICAL(sv)) /* see note in pp_helem() */ |
fd69380d | 4111 | mg_get(sv); |
be6c24e0 | 4112 | PUSHs(sv); |
a0d0e21e LW |
4113 | RETURN; |
4114 | } | |
4115 | ||
9026059d | 4116 | SV* |
864dbfa3 | 4117 | Perl_vivify_ref(pTHX_ SV *sv, U32 to_what) |
02a9e968 | 4118 | { |
7918f24d NC |
4119 | PERL_ARGS_ASSERT_VIVIFY_REF; |
4120 | ||
5b295bef | 4121 | SvGETMAGIC(sv); |
02a9e968 CS |
4122 | if (!SvOK(sv)) { |
4123 | if (SvREADONLY(sv)) | |
cb077ed2 | 4124 | Perl_croak_no_modify(); |
43230e26 | 4125 | prepare_SV_for_RV(sv); |
68dc0745 | 4126 | switch (to_what) { |
5f05dabc | 4127 | case OPpDEREF_SV: |
561b68a9 | 4128 | SvRV_set(sv, newSV(0)); |
5f05dabc | 4129 | break; |
4130 | case OPpDEREF_AV: | |
ad64d0ec | 4131 | SvRV_set(sv, MUTABLE_SV(newAV())); |
5f05dabc | 4132 | break; |
4133 | case OPpDEREF_HV: | |
ad64d0ec | 4134 | SvRV_set(sv, MUTABLE_SV(newHV())); |
5f05dabc | 4135 | break; |
4136 | } | |
02a9e968 CS |
4137 | SvROK_on(sv); |
4138 | SvSETMAGIC(sv); | |
7e482323 | 4139 | SvGETMAGIC(sv); |
02a9e968 | 4140 | } |
9026059d GG |
4141 | if (SvGMAGICAL(sv)) { |
4142 | /* copy the sv without magic to prevent magic from being | |
4143 | executed twice */ | |
4144 | SV* msv = sv_newmortal(); | |
4145 | sv_setsv_nomg(msv, sv); | |
4146 | return msv; | |
4147 | } | |
4148 | return sv; | |
02a9e968 CS |
4149 | } |
4150 | ||
7d6c333c | 4151 | PERL_STATIC_INLINE HV * |
4152 | S_opmethod_stash(pTHX_ SV* meth) | |
f5d5a27c | 4153 | { |
a0d0e21e | 4154 | SV* ob; |
56304f61 | 4155 | HV* stash; |
b55b14d0 | 4156 | |
d648ffcb | 4157 | SV* const sv = PL_stack_base + TOPMARK == PL_stack_sp |
f226e9be FC |
4158 | ? (Perl_croak(aTHX_ "Can't call method \"%"SVf"\" without a " |
4159 | "package or object reference", SVfARG(meth)), | |
4160 | (SV *)NULL) | |
4161 | : *(PL_stack_base + TOPMARK + 1); | |
f5d5a27c | 4162 | |
7d6c333c | 4163 | PERL_ARGS_ASSERT_OPMETHOD_STASH; |
d648ffcb | 4164 | |
5d9574c1 | 4165 | if (UNLIKELY(!sv)) |
7156e69a | 4166 | undefined: |
a214957f VP |
4167 | Perl_croak(aTHX_ "Can't call method \"%"SVf"\" on an undefined value", |
4168 | SVfARG(meth)); | |
4f1b7578 | 4169 | |
d648ffcb | 4170 | if (UNLIKELY(SvGMAGICAL(sv))) mg_get(sv); |
4171 | else if (SvIsCOW_shared_hash(sv)) { /* MyClass->meth() */ | |
4172 | stash = gv_stashsv(sv, GV_CACHE_ONLY); | |
7d6c333c | 4173 | if (stash) return stash; |
d648ffcb | 4174 | } |
4175 | ||
a0d0e21e | 4176 | if (SvROK(sv)) |
ad64d0ec | 4177 | ob = MUTABLE_SV(SvRV(sv)); |
7156e69a | 4178 | else if (!SvOK(sv)) goto undefined; |
a77c16f7 FC |
4179 | else if (isGV_with_GP(sv)) { |
4180 | if (!GvIO(sv)) | |
4181 | Perl_croak(aTHX_ "Can't call method \"%"SVf"\" " | |
4182 | "without a package or object reference", | |
4183 | SVfARG(meth)); | |
4184 | ob = sv; | |
4185 | if (SvTYPE(ob) == SVt_PVLV && LvTYPE(ob) == 'y') { | |
4186 | assert(!LvTARGLEN(ob)); | |
4187 | ob = LvTARG(ob); | |
4188 | assert(ob); | |
4189 | } | |
4190 | *(PL_stack_base + TOPMARK + 1) = sv_2mortal(newRV(ob)); | |
4191 | } | |
a0d0e21e | 4192 | else { |
89269094 | 4193 | /* this isn't a reference */ |
a0d0e21e | 4194 | GV* iogv; |
f937af42 | 4195 | STRLEN packlen; |
89269094 | 4196 | const char * const packname = SvPV_nomg_const(sv, packlen); |
d283e876 | 4197 | const U32 packname_utf8 = SvUTF8(sv); |
4198 | stash = gv_stashpvn(packname, packlen, packname_utf8 | GV_CACHE_ONLY); | |
7d6c333c | 4199 | if (stash) return stash; |
081fc587 | 4200 | |
89269094 | 4201 | if (!(iogv = gv_fetchpvn_flags( |
d283e876 | 4202 | packname, packlen, packname_utf8, SVt_PVIO |
da6b625f | 4203 | )) || |
ad64d0ec | 4204 | !(ob=MUTABLE_SV(GvIO(iogv)))) |
a0d0e21e | 4205 | { |
af09ea45 | 4206 | /* this isn't the name of a filehandle either */ |
89269094 | 4207 | if (!packlen) |
834a4ddd | 4208 | { |
7156e69a FC |
4209 | Perl_croak(aTHX_ "Can't call method \"%"SVf"\" " |
4210 | "without a package or object reference", | |
4211 | SVfARG(meth)); | |
834a4ddd | 4212 | } |
af09ea45 | 4213 | /* assume it's a package name */ |
d283e876 | 4214 | stash = gv_stashpvn(packname, packlen, packname_utf8); |
7d6c333c | 4215 | if (stash) return stash; |
4216 | else return MUTABLE_HV(sv); | |
a0d0e21e | 4217 | } |
af09ea45 | 4218 | /* it _is_ a filehandle name -- replace with a reference */ |
ad64d0ec | 4219 | *(PL_stack_base + TOPMARK + 1) = sv_2mortal(newRV(MUTABLE_SV(iogv))); |
a0d0e21e LW |
4220 | } |
4221 | ||
1f3ffe4c | 4222 | /* if we got here, ob should be an object or a glob */ |
f0d43078 | 4223 | if (!ob || !(SvOBJECT(ob) |
a77c16f7 | 4224 | || (isGV_with_GP(ob) |
159b6efe | 4225 | && (ob = MUTABLE_SV(GvIO((const GV *)ob))) |
f0d43078 GS |
4226 | && SvOBJECT(ob)))) |
4227 | { | |
b375e37b BF |
4228 | Perl_croak(aTHX_ "Can't call method \"%"SVf"\" on unblessed reference", |
4229 | SVfARG((SvSCREAM(meth) && strEQ(SvPV_nolen_const(meth),"isa")) | |
4230 | ? newSVpvs_flags("DOES", SVs_TEMP) | |
4231 | : meth)); | |
f0d43078 | 4232 | } |
a0d0e21e | 4233 | |
7d6c333c | 4234 | return SvSTASH(ob); |
4235 | } | |
4236 | ||
4237 | PP(pp_method) | |
4238 | { | |
4239 | dSP; | |
4240 | GV* gv; | |
4241 | HV* stash; | |
4242 | SV* const meth = TOPs; | |
4243 | ||
4244 | if (SvROK(meth)) { | |
4245 | SV* const rmeth = SvRV(meth); | |
4246 | if (SvTYPE(rmeth) == SVt_PVCV) { | |
4247 | SETs(rmeth); | |
4248 | RETURN; | |
4249 | } | |
4250 | } | |
a0d0e21e | 4251 | |
7d6c333c | 4252 | stash = opmethod_stash(meth); |
af09ea45 | 4253 | |
7d6c333c | 4254 | gv = gv_fetchmethod_sv_flags(stash, meth, GV_AUTOLOAD|GV_CROAK); |
4255 | assert(gv); | |
4256 | ||
4257 | SETs(isGV(gv) ? MUTABLE_SV(GvCV(gv)) : MUTABLE_SV(gv)); | |
4258 | RETURN; | |
4259 | } | |
4260 | ||
810bd8b7 | 4261 | #define METHOD_CHECK_CACHE(stash,cache,meth) \ |
4262 | const HE* const he = hv_fetch_ent(cache, meth, 0, 0); \ | |
4263 | if (he) { \ | |
4264 | gv = MUTABLE_GV(HeVAL(he)); \ | |
4265 | if (isGV(gv) && GvCV(gv) && (!GvCVGEN(gv) || GvCVGEN(gv) \ | |
4266 | == (PL_sub_generation + HvMROMETA(stash)->cache_gen))) \ | |
4267 | { \ | |
4268 | XPUSHs(MUTABLE_SV(GvCV(gv))); \ | |
4269 | RETURN; \ | |
4270 | } \ | |
4271 | } \ | |
4272 | ||
7d6c333c | 4273 | PP(pp_method_named) |
4274 | { | |
4275 | dSP; | |
4276 | GV* gv; | |
4277 | SV* const meth = cMETHOPx_meth(PL_op); | |
4278 | HV* const stash = opmethod_stash(meth); | |
4279 | ||
4280 | if (LIKELY(SvTYPE(stash) == SVt_PVHV)) { | |
810bd8b7 | 4281 | METHOD_CHECK_CACHE(stash, stash, meth); |
f5d5a27c CS |
4282 | } |
4283 | ||
7d6c333c | 4284 | gv = gv_fetchmethod_sv_flags(stash, meth, GV_AUTOLOAD|GV_CROAK); |
256d1bb2 | 4285 | assert(gv); |
9b9d0b15 | 4286 | |
7d6c333c | 4287 | XPUSHs(isGV(gv) ? MUTABLE_SV(GvCV(gv)) : MUTABLE_SV(gv)); |
4288 | RETURN; | |
4289 | } | |
4290 | ||
4291 | PP(pp_method_super) | |
4292 | { | |
4293 | dSP; | |
4294 | GV* gv; | |
4295 | HV* cache; | |
4296 | SV* const meth = cMETHOPx_meth(PL_op); | |
4297 | HV* const stash = CopSTASH(PL_curcop); | |
4298 | /* Actually, SUPER doesn't need real object's (or class') stash at all, | |
4299 | * as it uses CopSTASH. However, we must ensure that object(class) is | |
4300 | * correct (this check is done by S_opmethod_stash) */ | |
4301 | opmethod_stash(meth); | |
4302 | ||
4303 | if ((cache = HvMROMETA(stash)->super)) { | |
810bd8b7 | 4304 | METHOD_CHECK_CACHE(stash, cache, meth); |
4305 | } | |
4306 | ||
4307 | gv = gv_fetchmethod_sv_flags(stash, meth, GV_AUTOLOAD|GV_CROAK|GV_SUPER); | |
4308 | assert(gv); | |
4309 | ||
4310 | XPUSHs(isGV(gv) ? MUTABLE_SV(GvCV(gv)) : MUTABLE_SV(gv)); | |
4311 | RETURN; | |
4312 | } | |
4313 | ||
4314 | PP(pp_method_redir) | |
4315 | { | |
4316 | dSP; | |
4317 | GV* gv; | |
4318 | SV* const meth = cMETHOPx_meth(PL_op); | |
4319 | HV* stash = gv_stashsv(cMETHOPx_rclass(PL_op), 0); | |
4320 | opmethod_stash(meth); /* not used but needed for error checks */ | |
4321 | ||
4322 | if (stash) { METHOD_CHECK_CACHE(stash, stash, meth); } | |
4323 | else stash = MUTABLE_HV(cMETHOPx_rclass(PL_op)); | |
4324 | ||
4325 | gv = gv_fetchmethod_sv_flags(stash, meth, GV_AUTOLOAD|GV_CROAK); | |
4326 | assert(gv); | |
4327 | ||
4328 | XPUSHs(isGV(gv) ? MUTABLE_SV(GvCV(gv)) : MUTABLE_SV(gv)); | |
4329 | RETURN; | |
4330 | } | |
4331 | ||
4332 | PP(pp_method_redir_super) | |
4333 | { | |
4334 | dSP; | |
4335 | GV* gv; | |
4336 | HV* cache; | |
4337 | SV* const meth = cMETHOPx_meth(PL_op); | |
4338 | HV* stash = gv_stashsv(cMETHOPx_rclass(PL_op), 0); | |
4339 | opmethod_stash(meth); /* not used but needed for error checks */ | |
4340 | ||
4341 | if (UNLIKELY(!stash)) stash = MUTABLE_HV(cMETHOPx_rclass(PL_op)); | |
4342 | else if ((cache = HvMROMETA(stash)->super)) { | |
4343 | METHOD_CHECK_CACHE(stash, cache, meth); | |
7d6c333c | 4344 | } |
4345 | ||
4346 | gv = gv_fetchmethod_sv_flags(stash, meth, GV_AUTOLOAD|GV_CROAK|GV_SUPER); | |
4347 | assert(gv); | |
4348 | ||
4349 | XPUSHs(isGV(gv) ? MUTABLE_SV(GvCV(gv)) : MUTABLE_SV(gv)); | |
4350 | RETURN; | |
a0d0e21e | 4351 | } |
241d1a3b NC |
4352 | |
4353 | /* | |
14d04a33 | 4354 | * ex: set ts=8 sts=4 sw=4 et: |
37442d52 | 4355 | */ |