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; |
f4c975aa DM |
234 | SV *sv; |
235 | ||
f410a211 | 236 | PERL_ASYNC_CHECK(); |
f4c975aa DM |
237 | sv = POPs; |
238 | RETURNOP(SvTRUE_NN(sv) ? cLOGOP->op_other : 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 | ||
16fe3f8a DM |
256 | |
257 | /* The main body of pp_concat, not including the magic/overload and | |
258 | * stack handling. | |
259 | * It does targ = left . right. | |
260 | * Moved into a separate function so that pp_multiconcat() can use it | |
261 | * too. | |
262 | */ | |
263 | ||
264 | PERL_STATIC_INLINE void | |
265 | S_do_concat(pTHX_ SV *left, SV *right, SV *targ, U8 targmy) | |
a0d0e21e | 266 | { |
8d6d96c1 HS |
267 | bool lbyte; |
268 | STRLEN rlen; | |
d4c19fe8 | 269 | const char *rpv = NULL; |
a6b599c7 | 270 | bool rbyte = FALSE; |
a9c4fd4e | 271 | bool rcopied = FALSE; |
8d6d96c1 | 272 | |
6f1401dc DM |
273 | if (TARG == right && right != left) { /* $r = $l.$r */ |
274 | rpv = SvPV_nomg_const(right, rlen); | |
c75ab21a | 275 | rbyte = !DO_UTF8(right); |
59cd0e26 | 276 | right = newSVpvn_flags(rpv, rlen, SVs_TEMP); |
349d4f2f | 277 | rpv = SvPV_const(right, rlen); /* no point setting UTF-8 here */ |
db79b45b | 278 | rcopied = TRUE; |
8d6d96c1 | 279 | } |
7889fe52 | 280 | |
89734059 | 281 | if (TARG != left) { /* not $l .= $r */ |
a9c4fd4e | 282 | STRLEN llen; |
6f1401dc | 283 | const char* const lpv = SvPV_nomg_const(left, llen); |
90f5826e | 284 | lbyte = !DO_UTF8(left); |
8d6d96c1 HS |
285 | sv_setpvn(TARG, lpv, llen); |
286 | if (!lbyte) | |
287 | SvUTF8_on(TARG); | |
288 | else | |
289 | SvUTF8_off(TARG); | |
290 | } | |
18ea7bf2 S |
291 | else { /* $l .= $r and left == TARG */ |
292 | if (!SvOK(left)) { | |
51f69a24 | 293 | if ((left == right /* $l .= $l */ |
16fe3f8a | 294 | || targmy) /* $l = $l . $r */ |
51f69a24 AC |
295 | && ckWARN(WARN_UNINITIALIZED) |
296 | ) | |
297 | report_uninit(left); | |
adf14ec6 | 298 | SvPVCLEAR(left); |
c75ab21a | 299 | } |
18ea7bf2 S |
300 | else { |
301 | SvPV_force_nomg_nolen(left); | |
302 | } | |
583a5589 | 303 | lbyte = !DO_UTF8(left); |
90f5826e | 304 | if (IN_BYTES) |
18ea7bf2 | 305 | SvUTF8_off(left); |
8d6d96c1 | 306 | } |
a12c0f56 | 307 | |
c75ab21a | 308 | if (!rcopied) { |
6f1401dc | 309 | rpv = SvPV_nomg_const(right, rlen); |
c75ab21a RH |
310 | rbyte = !DO_UTF8(right); |
311 | } | |
8d6d96c1 HS |
312 | if (lbyte != rbyte) { |
313 | if (lbyte) | |
314 | sv_utf8_upgrade_nomg(TARG); | |
315 | else { | |
db79b45b | 316 | if (!rcopied) |
59cd0e26 | 317 | right = newSVpvn_flags(rpv, rlen, SVs_TEMP); |
8d6d96c1 | 318 | sv_utf8_upgrade_nomg(right); |
6f1401dc | 319 | rpv = SvPV_nomg_const(right, rlen); |
69b47968 | 320 | } |
a0d0e21e | 321 | } |
8d6d96c1 | 322 | sv_catpvn_nomg(TARG, rpv, rlen); |
16fe3f8a DM |
323 | SvSETMAGIC(TARG); |
324 | } | |
325 | ||
43ebc500 | 326 | |
16fe3f8a DM |
327 | PP(pp_concat) |
328 | { | |
329 | dSP; dATARGET; tryAMAGICbin_MG(concat_amg, AMGf_assign); | |
330 | { | |
331 | dPOPTOPssrl; | |
332 | S_do_concat(aTHX_ left, right, targ, PL_op->op_private & OPpTARGET_MY); | |
333 | SETs(TARG); | |
a0d0e21e | 334 | RETURN; |
748a9306 | 335 | } |
a0d0e21e LW |
336 | } |
337 | ||
e839e6ed DM |
338 | |
339 | /* pp_multiconcat() | |
340 | ||
341 | Concatenate one or more args, possibly interleaved with constant string | |
342 | segments. The result may be assigned to, or appended to, a variable or | |
343 | expression. | |
344 | ||
345 | Several op_flags and/or op_private bits indicate what the target is, and | |
346 | whether it's appended to. Valid permutations are: | |
347 | ||
348 | - (PADTMP) = (A.B.C....) | |
349 | OPpTARGET_MY $lex = (A.B.C....) | |
350 | OPpTARGET_MY,OPpLVAL_INTRO my $lex = (A.B.C....) | |
351 | OPpTARGET_MY,OPpMULTICONCAT_APPEND $lex .= (A.B.C....) | |
352 | OPf_STACKED expr = (A.B.C....) | |
353 | OPf_STACKED,OPpMULTICONCAT_APPEND expr .= (A.B.C....) | |
354 | ||
355 | Other combinations like (A.B).(C.D) are not optimised into a multiconcat | |
356 | op, as it's too hard to get the correct ordering of ties, overload etc. | |
357 | ||
358 | In addition: | |
359 | ||
360 | OPpMULTICONCAT_FAKE: not a real concat, instead an optimised | |
361 | sprintf "...%s...". Don't call '.' | |
362 | overloading: only use '""' overloading. | |
363 | ||
55b62dee DM |
364 | OPpMULTICONCAT_STRINGIFY: the RHS was of the form |
365 | "...$a...$b..." rather than | |
e839e6ed DM |
366 | "..." . $a . "..." . $b . "..." |
367 | ||
368 | An OP_MULTICONCAT is of type UNOP_AUX. The fixed slots of the aux array are | |
369 | defined with PERL_MULTICONCAT_IX_FOO constants, where: | |
370 | ||
371 | ||
372 | FOO index description | |
373 | -------- ----- ---------------------------------- | |
374 | NARGS 0 number of arguments | |
375 | PLAIN_PV 1 non-utf8 constant string | |
376 | PLAIN_LEN 2 non-utf8 constant string length | |
377 | UTF8_PV 3 utf8 constant string | |
378 | UTF8_LEN 4 utf8 constant string length | |
379 | LENGTHS 5 first of nargs+1 const segment lengths | |
380 | ||
381 | The idea is that a general string concatenation will have a fixed (known | |
382 | at compile time) number of variable args, interspersed with constant | |
383 | strings, e.g. "a=$a b=$b\n" | |
384 | ||
385 | All the constant string segments "a=", " b=" and "\n" are stored as a | |
386 | single string "a= b=\n", pointed to from the PLAIN_PV/UTF8_PV slot, along | |
387 | with a series of segment lengths: e.g. 2,3,1. In the case where the | |
388 | constant string is plain but has a different utf8 representation, both | |
389 | variants are stored, and two sets of (nargs+1) segments lengths are stored | |
390 | in the slots beginning at PERL_MULTICONCAT_IX_LENGTHS. | |
391 | ||
392 | A segment length of -1 indicates that there is no constant string at that | |
393 | point; this distinguishes between e.g. ($a . $b) and ($a . "" . $b), which | |
394 | have differing overloading behaviour. | |
395 | ||
396 | */ | |
397 | ||
398 | PP(pp_multiconcat) | |
399 | { | |
400 | dSP; | |
401 | SV *targ; /* The SV to be assigned or appended to */ | |
057ba76a | 402 | char *targ_pv; /* where within SvPVX(targ) we're writing to */ |
e839e6ed DM |
403 | STRLEN targ_len; /* SvCUR(targ) */ |
404 | SV **toparg; /* the highest arg position on the stack */ | |
405 | UNOP_AUX_item *aux; /* PL_op->op_aux buffer */ | |
406 | UNOP_AUX_item *const_lens; /* the segment length array part of aux */ | |
407 | const char *const_pv; /* the current segment of the const string buf */ | |
ca84e88e DM |
408 | SSize_t nargs; /* how many args were expected */ |
409 | SSize_t stack_adj; /* how much to adjust SP on return */ | |
057ba76a | 410 | STRLEN grow; /* final size of destination string (targ) */ |
e839e6ed DM |
411 | UV targ_count; /* how many times targ has appeared on the RHS */ |
412 | bool is_append; /* OPpMULTICONCAT_APPEND flag is set */ | |
413 | bool slow_concat; /* args too complex for quick concat */ | |
414 | U32 dst_utf8; /* the result will be utf8 (indicate this with | |
415 | SVf_UTF8 in a U32, rather than using bool, | |
416 | for ease of testing and setting) */ | |
417 | /* for each arg, holds the result of an SvPV() call */ | |
418 | struct multiconcat_svpv { | |
419 | char *pv; | |
420 | SSize_t len; | |
421 | } | |
422 | *targ_chain, /* chain of slots where targ has appeared on RHS */ | |
423 | *svpv_p, /* ptr for looping through svpv_buf */ | |
424 | *svpv_base, /* first slot (may be greater than svpv_buf), */ | |
425 | *svpv_end, /* and slot after highest result so far, of: */ | |
426 | svpv_buf[PERL_MULTICONCAT_MAXARG]; /* buf for storing SvPV() results */ | |
427 | ||
428 | aux = cUNOP_AUXx(PL_op)->op_aux; | |
ca84e88e | 429 | stack_adj = nargs = aux[PERL_MULTICONCAT_IX_NARGS].ssize; |
e839e6ed DM |
430 | is_append = cBOOL(PL_op->op_private & OPpMULTICONCAT_APPEND); |
431 | ||
432 | /* get targ from the stack or pad */ | |
433 | ||
434 | if (PL_op->op_flags & OPf_STACKED) { | |
435 | if (is_append) { | |
436 | /* for 'expr .= ...', expr is the bottom item on the stack */ | |
437 | targ = SP[-nargs]; | |
438 | stack_adj++; | |
439 | } | |
440 | else | |
441 | /* for 'expr = ...', expr is the top item on the stack */ | |
442 | targ = POPs; | |
443 | } | |
444 | else { | |
445 | SV **svp = &(PAD_SVl(PL_op->op_targ)); | |
446 | targ = *svp; | |
447 | if (PL_op->op_private & OPpLVAL_INTRO) { | |
448 | assert(PL_op->op_private & OPpTARGET_MY); | |
449 | save_clearsv(svp); | |
450 | } | |
451 | if (!nargs) | |
452 | /* $lex .= "const" doesn't cause anything to be pushed */ | |
453 | EXTEND(SP,1); | |
454 | } | |
455 | ||
456 | toparg = SP; | |
457 | SP -= (nargs - 1); | |
e839e6ed DM |
458 | grow = 1; /* allow for '\0' at minimum */ |
459 | targ_count = 0; | |
460 | targ_chain = NULL; | |
461 | targ_len = 0; | |
462 | svpv_end = svpv_buf; | |
463 | /* only utf8 variants of the const strings? */ | |
464 | dst_utf8 = aux[PERL_MULTICONCAT_IX_PLAIN_PV].pv ? 0 : SVf_UTF8; | |
465 | ||
466 | ||
467 | /* -------------------------------------------------------------- | |
468 | * Phase 1: | |
469 | * | |
470 | * stringify (i.e. SvPV()) every arg and store the resultant pv/len/utf8 | |
471 | * triplets in svpv_buf[]. Also increment 'grow' by the args' lengths. | |
472 | * | |
473 | * utf8 is indicated by storing a negative length. | |
474 | * | |
475 | * Where an arg is actually targ, the stringification is deferred: | |
476 | * the length is set to 0, and the slot is added to targ_chain. | |
477 | * | |
af390142 DM |
478 | * If a magic, overloaded, or otherwise weird arg is found, which |
479 | * might have side effects when stringified, the loop is abandoned and | |
480 | * we goto a code block where a more basic 'emulate calling | |
481 | * pp_cpncat() on each arg in turn' is done. | |
e839e6ed DM |
482 | */ |
483 | ||
484 | for (; SP <= toparg; SP++, svpv_end++) { | |
e839e6ed DM |
485 | U32 utf8; |
486 | STRLEN len; | |
487 | SV *sv; | |
488 | ||
489 | assert(svpv_end - svpv_buf < PERL_MULTICONCAT_MAXARG); | |
490 | ||
491 | sv = *SP; | |
e839e6ed DM |
492 | |
493 | /* this if/else chain is arranged so that common/simple cases | |
494 | * take few conditionals */ | |
495 | ||
af390142 DM |
496 | if (LIKELY((SvFLAGS(sv) & (SVs_GMG|SVf_ROK|SVf_POK)) == SVf_POK)) { |
497 | /* common case: sv is a simple non-magical PV */ | |
498 | if (targ == sv) { | |
499 | /* targ appears on RHS. | |
500 | * Delay storing PV pointer; instead, add slot to targ_chain | |
501 | * so it can be populated later, after targ has been grown and | |
502 | * we know its final SvPVX() address. | |
503 | */ | |
504 | targ_on_rhs: | |
505 | svpv_end->len = 0; /* zerojng here means we can skip | |
506 | updating later if targ_len == 0 */ | |
507 | svpv_end->pv = (char*)targ_chain; | |
508 | targ_chain = svpv_end; | |
509 | targ_count++; | |
510 | continue; | |
511 | } | |
512 | ||
e839e6ed | 513 | len = SvCUR(sv); |
af390142 | 514 | svpv_end->pv = SvPVX(sv); |
e839e6ed | 515 | } |
af390142 DM |
516 | else if (UNLIKELY(SvFLAGS(sv) & (SVs_GMG|SVf_ROK))) |
517 | /* may have side effects: tie, overload etc. | |
518 | * Abandon 'stringify everything first' and handle | |
519 | * args in strict order. Note that already-stringified args | |
520 | * will be reprocessed, which is safe because the each first | |
521 | * stringification would have been idempotent. | |
e839e6ed | 522 | */ |
af390142 DM |
523 | goto do_magical; |
524 | else if (SvNIOK(sv)) { | |
525 | if (targ == sv) | |
526 | goto targ_on_rhs; | |
527 | /* stringify general valid scalar */ | |
e839e6ed DM |
528 | svpv_end->pv = sv_2pv_flags(sv, &len, 0); |
529 | } | |
af390142 DM |
530 | else if (!SvOK(sv)) { |
531 | if (ckWARN(WARN_UNINITIALIZED)) | |
532 | /* an undef value in the presence of warnings may trigger | |
533 | * side affects */ | |
534 | goto do_magical; | |
535 | svpv_end->pv = (char*)""; | |
536 | len = 0; | |
537 | } | |
538 | else | |
539 | goto do_magical; /* something weird */ | |
e839e6ed DM |
540 | |
541 | utf8 = (SvFLAGS(sv) & SVf_UTF8); | |
542 | dst_utf8 |= utf8; | |
543 | ASSUME(len < SSize_t_MAX); | |
544 | svpv_end->len = utf8 ? -(SSize_t)len : (SSize_t)len; | |
545 | grow += len; | |
546 | } | |
547 | ||
548 | /* -------------------------------------------------------------- | |
549 | * Phase 2: | |
550 | * | |
551 | * Stringify targ: | |
552 | * | |
553 | * if targ appears on the RHS or is appended to, force stringify it; | |
554 | * otherwise set it to "". Then set targ_len. | |
555 | */ | |
556 | ||
557 | if (is_append) { | |
af390142 DM |
558 | /* abandon quick route if using targ might have side effects */ |
559 | if (UNLIKELY(SvFLAGS(targ) & (SVs_GMG|SVf_ROK))) | |
560 | goto do_magical; | |
e839e6ed DM |
561 | |
562 | if (SvOK(targ)) { | |
563 | U32 targ_utf8; | |
564 | stringify_targ: | |
565 | SvPV_force_nomg_nolen(targ); | |
566 | targ_utf8 = SvFLAGS(targ) & SVf_UTF8; | |
567 | if (UNLIKELY(dst_utf8 & ~targ_utf8)) { | |
568 | if (LIKELY(!IN_BYTES)) | |
569 | sv_utf8_upgrade_nomg(targ); | |
570 | } | |
571 | else | |
572 | dst_utf8 |= targ_utf8; | |
573 | ||
574 | targ_len = SvCUR(targ); | |
575 | grow += targ_len * (targ_count + is_append); | |
576 | goto phase3; | |
577 | } | |
af390142 DM |
578 | else if (ckWARN(WARN_UNINITIALIZED)) |
579 | /* warning might have side effects */ | |
580 | goto do_magical; | |
581 | /* the undef targ will be silently SvPVCLEAR()ed below */ | |
e839e6ed DM |
582 | } |
583 | else if (UNLIKELY(SvTYPE(targ) >= SVt_REGEXP)) { | |
584 | /* Assigning to some weird LHS type. Don't force the LHS to be an | |
585 | * empty string; instead, do things 'long hand' by using the | |
586 | * overload code path, which concats to a TEMP sv and does | |
587 | * sv_catsv() calls rather than COPY()s. This ensures that even | |
588 | * bizarre code like this doesn't break or crash: | |
589 | * *F = *F . *F. | |
590 | * (which makes the 'F' typeglob an alias to the | |
591 | * '*main::F*main::F' typeglob). | |
592 | */ | |
af390142 | 593 | goto do_magical; |
e839e6ed | 594 | } |
af390142 | 595 | else if (targ_chain) |
e839e6ed | 596 | /* targ was found on RHS. |
af390142 DM |
597 | * Force stringify it, using the same code as the append branch |
598 | * above, except that we don't need the magic/overload/undef | |
599 | * checks as these will already have been done in the phase 1 | |
600 | * loop. | |
e839e6ed | 601 | */ |
e839e6ed | 602 | goto stringify_targ; |
e839e6ed DM |
603 | |
604 | /* unrolled SvPVCLEAR() - mostly: no need to grow or set SvCUR() to 0; | |
605 | * those will be done later. */ | |
e839e6ed DM |
606 | SV_CHECK_THINKFIRST_COW_DROP(targ); |
607 | SvUPGRADE(targ, SVt_PV); | |
608 | SvFLAGS(targ) &= ~(SVf_OK|SVf_IVisUV|SVf_UTF8); | |
609 | SvFLAGS(targ) |= (SVf_POK|SVp_POK|dst_utf8); | |
610 | ||
611 | phase3: | |
612 | ||
613 | /* -------------------------------------------------------------- | |
614 | * Phase 3: | |
615 | * | |
057ba76a | 616 | * UTF-8 tweaks and grow targ: |
e839e6ed DM |
617 | * |
618 | * Now that we know the length and utf8-ness of both the targ and | |
057ba76a | 619 | * args, grow targ to the size needed to accumulate all the args, based |
e839e6ed DM |
620 | * on whether targ appears on the RHS, whether we're appending, and |
621 | * whether any non-utf8 args expand in size if converted to utf8. | |
622 | * | |
623 | * For the latter, if dst_utf8 we scan non-utf8 args looking for | |
624 | * variant chars, and adjust the svpv->len value of those args to the | |
625 | * utf8 size and negate it to flag them. At the same time we un-negate | |
626 | * the lens of any utf8 args since after this phase we no longer care | |
627 | * whether an arg is utf8 or not. | |
628 | * | |
629 | * Finally, initialise const_lens and const_pv based on utf8ness. | |
630 | * Note that there are 3 permutations: | |
631 | * | |
632 | * * If the constant string is invariant whether utf8 or not (e.g. "abc"), | |
633 | * then aux[PERL_MULTICONCAT_IX_PLAIN_PV/LEN] are the same as | |
634 | * aux[PERL_MULTICONCAT_IX_UTF8_PV/LEN] and there is one set of | |
635 | * segment lengths. | |
636 | * | |
637 | * * If the string is fully utf8, e.g. "\x{100}", then | |
638 | * aux[PERL_MULTICONCAT_IX_PLAIN_PV/LEN] == (NULL,0) and there is | |
639 | * one set of segment lengths. | |
640 | * | |
641 | * * If the string has different plain and utf8 representations | |
642 | * (e.g. "\x80"), then then aux[PERL_MULTICONCAT_IX_PLAIN_PV/LEN]] | |
643 | * holds the plain rep, while aux[PERL_MULTICONCAT_IX_UTF8_PV/LEN] | |
644 | * holds the utf8 rep, and there are 2 sets of segment lengths, | |
645 | * with the utf8 set following after the plain set. | |
646 | * | |
647 | * On entry to this section the (pv,len) pairs in svpv_buf have the | |
648 | * following meanings: | |
649 | * (pv, len) a plain string | |
650 | * (pv, -len) a utf8 string | |
651 | * (NULL, 0) left-most targ \ linked together R-to-L | |
652 | * (next, 0) other targ / in targ_chain | |
653 | */ | |
654 | ||
655 | /* turn off utf8 handling if 'use bytes' is in scope */ | |
656 | if (UNLIKELY(dst_utf8 && IN_BYTES)) { | |
657 | dst_utf8 = 0; | |
057ba76a | 658 | SvUTF8_off(targ); |
e839e6ed DM |
659 | /* undo all the negative lengths which flag utf8-ness */ |
660 | for (svpv_p = svpv_buf; svpv_p < svpv_end; svpv_p++) { | |
661 | SSize_t len = svpv_p->len; | |
662 | if (len < 0) | |
663 | svpv_p->len = -len; | |
664 | } | |
665 | } | |
666 | ||
667 | /* grow += total of lengths of constant string segments */ | |
668 | { | |
669 | SSize_t len; | |
670 | len = aux[dst_utf8 ? PERL_MULTICONCAT_IX_UTF8_LEN | |
b5bf9f73 | 671 | : PERL_MULTICONCAT_IX_PLAIN_LEN].ssize; |
e839e6ed DM |
672 | slow_concat = cBOOL(len); |
673 | grow += len; | |
674 | } | |
675 | ||
676 | const_lens = aux + PERL_MULTICONCAT_IX_LENGTHS; | |
677 | ||
678 | if (dst_utf8) { | |
679 | const_pv = aux[PERL_MULTICONCAT_IX_UTF8_PV].pv; | |
680 | if ( aux[PERL_MULTICONCAT_IX_PLAIN_PV].pv | |
681 | && const_pv != aux[PERL_MULTICONCAT_IX_PLAIN_PV].pv) | |
682 | /* separate sets of lengths for plain and utf8 */ | |
683 | const_lens += nargs + 1; | |
684 | ||
685 | /* If the result is utf8 but some of the args aren't, | |
686 | * calculate how much extra growth is needed for all the chars | |
687 | * which will expand to two utf8 bytes. | |
688 | * Also, if the growth is non-zero, negate the length to indicate | |
689 | * that this this is a variant string. Conversely, un-negate the | |
690 | * length on utf8 args (which was only needed to flag non-utf8 | |
691 | * args in this loop */ | |
692 | for (svpv_p = svpv_buf; svpv_p < svpv_end; svpv_p++) { | |
7d5ed5d0 | 693 | SSize_t len, extra; |
e839e6ed DM |
694 | |
695 | len = svpv_p->len; | |
696 | if (len <= 0) { | |
697 | svpv_p->len = -len; | |
698 | continue; | |
699 | } | |
700 | ||
7d5ed5d0 KW |
701 | extra = variant_under_utf8_count((U8 *) svpv_p->pv, |
702 | (U8 *) svpv_p->pv + len); | |
e839e6ed DM |
703 | if (UNLIKELY(extra)) { |
704 | grow += extra; | |
705 | /* -ve len indicates special handling */ | |
706 | svpv_p->len = -(len + extra); | |
707 | slow_concat = TRUE; | |
708 | } | |
709 | } | |
710 | } | |
711 | else | |
712 | const_pv = aux[PERL_MULTICONCAT_IX_PLAIN_PV].pv; | |
713 | ||
714 | /* unrolled SvGROW(), except don't check for SVf_IsCOW, which should | |
715 | * already have been dropped */ | |
057ba76a DM |
716 | assert(!SvIsCOW(targ)); |
717 | targ_pv = (SvLEN(targ) < (grow) ? sv_grow(targ,grow) : SvPVX(targ)); | |
e839e6ed DM |
718 | |
719 | ||
720 | /* -------------------------------------------------------------- | |
721 | * Phase 4: | |
722 | * | |
057ba76a DM |
723 | * Now that targ has been grown, we know the final address of the targ |
724 | * PVX, if needed. Preserve / move targ contents if appending or if | |
725 | * targ appears on RHS. | |
e839e6ed DM |
726 | * |
727 | * Also update svpv_buf slots in targ_chain. | |
728 | * | |
729 | * Don't bother with any of this if the target length is zero: | |
730 | * targ_len is set to zero unless we're appending or targ appears on | |
731 | * RHS. And even if it is, we can optimise by skipping this chunk of | |
732 | * code for zero targ_len. In the latter case, we don't need to update | |
733 | * the slots in targ_chain with the (zero length) target string, since | |
734 | * we set the len in such slots to 0 earlier, and since the Copy() is | |
735 | * skipped on zero length, it doesn't matter what svpv_p->pv contains. | |
736 | * | |
737 | * On entry to this section the (pv,len) pairs in svpv_buf have the | |
738 | * following meanings: | |
739 | * (pv, len) a pure-plain or utf8 string | |
740 | * (pv, -(len+extra)) a plain string which will expand by 'extra' | |
741 | * bytes when converted to utf8 | |
742 | * (NULL, 0) left-most targ \ linked together R-to-L | |
743 | * (next, 0) other targ / in targ_chain | |
744 | * | |
745 | * On exit, the targ contents will have been moved to the | |
746 | * earliest place they are needed (e.g. $x = "abc$x" will shift them | |
747 | * 3 bytes, while $x .= ... will leave them at the beginning); | |
057ba76a | 748 | * and dst_pv will point to the location within SvPVX(targ) where the |
e839e6ed DM |
749 | * next arg should be copied. |
750 | */ | |
751 | ||
752 | svpv_base = svpv_buf; | |
753 | ||
754 | if (targ_len) { | |
755 | struct multiconcat_svpv *tc_stop; | |
057ba76a | 756 | char *targ_buf = targ_pv; /* ptr to original targ string */ |
e839e6ed | 757 | |
e839e6ed DM |
758 | assert(is_append || targ_count); |
759 | ||
760 | if (is_append) { | |
057ba76a | 761 | targ_pv += targ_len; |
e839e6ed DM |
762 | tc_stop = NULL; |
763 | } | |
764 | else { | |
765 | /* The targ appears on RHS, e.g. '$t = $a . $t . $t'. | |
766 | * Move the current contents of targ to the first | |
767 | * position where it's needed, and use that as the src buffer | |
768 | * for any further uses (such as the second RHS $t above). | |
769 | * In calculating the first position, we need to sum the | |
770 | * lengths of all consts and args before that. | |
771 | */ | |
772 | ||
773 | UNOP_AUX_item *lens = const_lens; | |
774 | /* length of first const string segment */ | |
b5bf9f73 | 775 | STRLEN offset = lens->ssize > 0 ? lens->ssize : 0; |
e839e6ed DM |
776 | |
777 | assert(targ_chain); | |
778 | svpv_p = svpv_base; | |
779 | ||
780 | for (;;) { | |
781 | SSize_t len; | |
782 | if (!svpv_p->pv) | |
783 | break; /* the first targ argument */ | |
784 | /* add lengths of the next arg and const string segment */ | |
785 | len = svpv_p->len; | |
786 | if (len < 0) /* variant args have this */ | |
787 | len = -len; | |
788 | offset += (STRLEN)len; | |
b5bf9f73 | 789 | len = (++lens)->ssize; |
e839e6ed DM |
790 | offset += (len >= 0) ? (STRLEN)len : 0; |
791 | if (!offset) { | |
792 | /* all args and consts so far are empty; update | |
793 | * the start position for the concat later */ | |
794 | svpv_base++; | |
795 | const_lens++; | |
796 | } | |
797 | svpv_p++; | |
798 | assert(svpv_p < svpv_end); | |
799 | } | |
800 | ||
801 | if (offset) { | |
057ba76a DM |
802 | targ_buf += offset; |
803 | Move(targ_pv, targ_buf, targ_len, char); | |
e839e6ed | 804 | /* a negative length implies don't Copy(), but do increment */ |
90b21a3e | 805 | svpv_p->len = -((SSize_t)targ_len); |
e839e6ed DM |
806 | slow_concat = TRUE; |
807 | } | |
808 | else { | |
809 | /* skip the first targ copy */ | |
810 | svpv_base++; | |
811 | const_lens++; | |
057ba76a | 812 | targ_pv += targ_len; |
e839e6ed DM |
813 | } |
814 | ||
815 | /* Don't populate the first targ slot in the loop below; it's | |
816 | * either not used because we advanced svpv_base beyond it, or | |
817 | * we already stored the special -targ_len value in it | |
818 | */ | |
819 | tc_stop = svpv_p; | |
820 | } | |
821 | ||
822 | /* populate slots in svpv_buf representing targ on RHS */ | |
823 | while (targ_chain != tc_stop) { | |
824 | struct multiconcat_svpv *p = targ_chain; | |
825 | targ_chain = (struct multiconcat_svpv *)(p->pv); | |
057ba76a | 826 | p->pv = targ_buf; |
e839e6ed DM |
827 | p->len = (SSize_t)targ_len; |
828 | } | |
829 | } | |
830 | ||
831 | ||
832 | /* -------------------------------------------------------------- | |
833 | * Phase 5: | |
834 | * | |
057ba76a | 835 | * Append all the args in svpv_buf, plus the const strings, to targ. |
e839e6ed DM |
836 | * |
837 | * On entry to this section the (pv,len) pairs in svpv_buf have the | |
838 | * following meanings: | |
839 | * (pv, len) a pure-plain or utf8 string (which may be targ) | |
840 | * (pv, -(len+extra)) a plain string which will expand by 'extra' | |
841 | * bytes when converted to utf8 | |
842 | * (0, -len) left-most targ, whose content has already | |
057ba76a | 843 | * been copied. Just advance targ_pv by len. |
e839e6ed DM |
844 | */ |
845 | ||
846 | /* If there are no constant strings and no special case args | |
847 | * (svpv_p->len < 0), use a simpler, more efficient concat loop | |
848 | */ | |
849 | if (!slow_concat) { | |
850 | for (svpv_p = svpv_base; svpv_p < svpv_end; svpv_p++) { | |
851 | SSize_t len = svpv_p->len; | |
852 | if (!len) | |
853 | continue; | |
057ba76a DM |
854 | Copy(svpv_p->pv, targ_pv, len, char); |
855 | targ_pv += len; | |
e839e6ed DM |
856 | } |
857 | const_lens += (svpv_end - svpv_base + 1); | |
858 | } | |
859 | else { | |
860 | /* Note that we iterate the loop nargs+1 times: to append nargs | |
861 | * arguments and nargs+1 constant strings. For example, "-$a-$b-" | |
862 | */ | |
863 | svpv_p = svpv_base - 1; | |
864 | ||
865 | for (;;) { | |
b5bf9f73 | 866 | SSize_t len = (const_lens++)->ssize; |
e839e6ed DM |
867 | |
868 | /* append next const string segment */ | |
869 | if (len > 0) { | |
057ba76a DM |
870 | Copy(const_pv, targ_pv, len, char); |
871 | targ_pv += len; | |
e839e6ed DM |
872 | const_pv += len; |
873 | } | |
874 | ||
875 | if (++svpv_p == svpv_end) | |
876 | break; | |
877 | ||
878 | /* append next arg */ | |
879 | len = svpv_p->len; | |
880 | ||
881 | if (LIKELY(len > 0)) { | |
057ba76a DM |
882 | Copy(svpv_p->pv, targ_pv, len, char); |
883 | targ_pv += len; | |
e839e6ed DM |
884 | } |
885 | else if (UNLIKELY(len < 0)) { | |
886 | /* negative length indicates two special cases */ | |
887 | const char *p = svpv_p->pv; | |
888 | len = -len; | |
889 | if (UNLIKELY(p)) { | |
890 | /* copy plain-but-variant pv to a utf8 targ */ | |
057ba76a | 891 | char * end_pv = targ_pv + len; |
e839e6ed | 892 | assert(dst_utf8); |
057ba76a | 893 | while (targ_pv < end_pv) { |
e839e6ed | 894 | U8 c = (U8) *p++; |
057ba76a | 895 | append_utf8_from_native_byte(c, (U8**)&targ_pv); |
e839e6ed DM |
896 | } |
897 | } | |
898 | else | |
899 | /* arg is already-copied targ */ | |
057ba76a | 900 | targ_pv += len; |
e839e6ed DM |
901 | } |
902 | ||
903 | } | |
904 | } | |
905 | ||
057ba76a DM |
906 | *targ_pv = '\0'; |
907 | SvCUR_set(targ, targ_pv - SvPVX(targ)); | |
908 | assert(grow >= SvCUR(targ) + 1); | |
909 | assert(SvLEN(targ) >= SvCUR(targ) + 1); | |
e839e6ed DM |
910 | |
911 | /* -------------------------------------------------------------- | |
912 | * Phase 6: | |
913 | * | |
af390142 | 914 | * return result |
e839e6ed DM |
915 | */ |
916 | ||
af390142 DM |
917 | SP -= stack_adj; |
918 | SvTAINT(targ); | |
919 | SETTARG; | |
920 | RETURN; | |
e839e6ed | 921 | |
af390142 DM |
922 | /* -------------------------------------------------------------- |
923 | * Phase 7: | |
924 | * | |
925 | * We only get here if any of the args (or targ too in the case of | |
926 | * append) have something which might cause side effects, such | |
927 | * as magic, overload, or an undef value in the presence of warnings. | |
928 | * In that case, any earlier attempt to stringify the args will have | |
929 | * been abandoned, and we come here instead. | |
930 | * | |
931 | * Here, we concat each arg in turn the old-fashioned way: essentially | |
932 | * emulating pp_concat() in a loop. This means that all the weird edge | |
933 | * cases will be handled correctly, if not necessarily speedily. | |
934 | * | |
935 | * Note that some args may already have been stringified - those are | |
936 | * processed again, which is safe, since only args without side-effects | |
937 | * were stringified earlier. | |
938 | */ | |
939 | ||
940 | do_magical: | |
941 | { | |
942 | SSize_t i, n; | |
943 | SV *left = NULL; | |
944 | SV *right; | |
945 | SV* nexttarg; | |
946 | bool nextappend; | |
947 | U32 utf8 = 0; | |
948 | SV **svp; | |
949 | const char *cpv = aux[PERL_MULTICONCAT_IX_PLAIN_PV].pv; | |
950 | UNOP_AUX_item *lens = aux + PERL_MULTICONCAT_IX_LENGTHS; | |
55b62dee | 951 | Size_t arg_count = 0; /* how many args have been processed */ |
af390142 DM |
952 | |
953 | if (!cpv) { | |
954 | cpv = aux[PERL_MULTICONCAT_IX_UTF8_PV].pv; | |
955 | utf8 = SVf_UTF8; | |
956 | } | |
957 | ||
958 | svp = toparg - nargs + 1; | |
959 | ||
960 | /* iterate for: | |
961 | * nargs arguments, | |
962 | * plus possible nargs+1 consts, | |
963 | * plus, if appending, a final targ in an extra last iteration | |
964 | */ | |
965 | ||
966 | n = nargs *2 + 1; | |
55b62dee DM |
967 | for (i = 0; i <= n; i++) { |
968 | SSize_t len; | |
969 | ||
970 | /* if necessary, stringify the final RHS result in | |
971 | * something like $targ .= "$a$b$c" - simulating | |
972 | * pp_stringify | |
973 | */ | |
974 | if ( i == n | |
975 | && (PL_op->op_private &OPpMULTICONCAT_STRINGIFY) | |
976 | && !(SvPOK(left)) | |
977 | /* extra conditions for backwards compatibility: | |
978 | * probably incorrect, but keep the existing behaviour | |
979 | * for now. The rules are: | |
980 | * $x = "$ov" single arg: stringify; | |
981 | * $x = "$ov$y" multiple args: don't stringify, | |
982 | * $lex = "$ov$y$z" except TARGMY with at least 2 concats | |
983 | */ | |
984 | && ( arg_count == 1 | |
985 | || ( arg_count >= 3 | |
986 | && !is_append | |
987 | && (PL_op->op_private & OPpTARGET_MY) | |
988 | && !(PL_op->op_private & OPpLVAL_INTRO) | |
989 | ) | |
990 | ) | |
991 | ) | |
992 | { | |
993 | SV *tmp = sv_newmortal(); | |
994 | sv_copypv(tmp, left); | |
995 | SvSETMAGIC(tmp); | |
996 | left = tmp; | |
997 | } | |
998 | ||
999 | /* do one extra iteration to handle $targ in $targ .= ... */ | |
1000 | if (i == n && !is_append) | |
1001 | break; | |
1002 | ||
af390142 | 1003 | /* get the next arg SV or regen the next const SV */ |
55b62dee | 1004 | len = lens[i >> 1].ssize; |
af390142 DM |
1005 | if (i == n) { |
1006 | /* handle the final targ .= (....) */ | |
1007 | right = left; | |
1008 | left = targ; | |
1009 | } | |
1010 | else if (i & 1) | |
1011 | right = svp[(i >> 1)]; | |
1012 | else if (len < 0) | |
1013 | continue; /* no const in this position */ | |
1014 | else { | |
1015 | right = newSVpvn_flags(cpv, len, (utf8 | SVs_TEMP)); | |
1016 | cpv += len; | |
1017 | } | |
e839e6ed | 1018 | |
55b62dee DM |
1019 | arg_count++; |
1020 | ||
1021 | if (arg_count <= 1) { | |
af390142 DM |
1022 | left = right; |
1023 | continue; /* need at least two SVs to concat together */ | |
1024 | } | |
1025 | ||
55b62dee | 1026 | if (arg_count == 2 && i < n) { |
af390142 DM |
1027 | /* for the first concat, create a mortal acting like the |
1028 | * padtmp from OP_CONST. In later iterations this will | |
1029 | * be appended to */ | |
1030 | nexttarg = sv_newmortal(); | |
1031 | nextappend = FALSE; | |
af390142 DM |
1032 | } |
1033 | else { | |
1034 | nexttarg = left; | |
1035 | nextappend = TRUE; | |
1036 | } | |
1037 | ||
1038 | /* Handle possible overloading. | |
1039 | * This is basically an unrolled | |
1040 | * tryAMAGICbin_MG(concat_amg, AMGf_assign); | |
1041 | * and | |
1042 | * Perl_try_amagic_bin() | |
1043 | * call, but using left and right rather than SP[-1], SP[0], | |
1044 | * and not relying on OPf_STACKED implying .= | |
e839e6ed | 1045 | */ |
e839e6ed | 1046 | |
af390142 DM |
1047 | if ((SvFLAGS(left)|SvFLAGS(right)) & (SVf_ROK|SVs_GMG)) { |
1048 | SvGETMAGIC(left); | |
1049 | if (left != right) | |
1050 | SvGETMAGIC(right); | |
1051 | ||
1052 | if ((SvAMAGIC(left) || SvAMAGIC(right)) | |
1053 | /* sprintf doesn't do concat overloading, | |
1054 | * but allow for $x .= sprintf(...) | |
1055 | */ | |
1056 | && ( !(PL_op->op_private & OPpMULTICONCAT_FAKE) | |
1057 | || i == n) | |
e839e6ed | 1058 | ) |
af390142 DM |
1059 | { |
1060 | SV * const tmpsv = amagic_call(left, right, concat_amg, | |
1061 | (nextappend ? AMGf_assign: 0)); | |
1062 | if (tmpsv) { | |
7554d344 DM |
1063 | /* NB: tryAMAGICbin_MG() includes an OPpTARGET_MY test |
1064 | * here, which isn't needed as any implicit | |
1065 | * assign done under OPpTARGET_MY is done after | |
af390142 DM |
1066 | * this loop */ |
1067 | if (nextappend) { | |
1068 | sv_setsv(left, tmpsv); | |
1069 | SvSETMAGIC(left); | |
e839e6ed | 1070 | } |
af390142 DM |
1071 | else |
1072 | left = tmpsv; | |
1073 | continue; | |
1074 | } | |
1075 | } | |
1076 | ||
1077 | /* if both args are the same magical value, make one a copy */ | |
1078 | if (left == right && SvGMAGICAL(left)) { | |
1079 | left = sv_newmortal(); | |
1080 | /* Print the uninitialized warning now, so it includes the | |
1081 | * variable name. */ | |
1082 | if (!SvOK(right)) { | |
1083 | if (ckWARN(WARN_UNINITIALIZED)) | |
1084 | report_uninit(right); | |
1085 | sv_setsv_flags(left, &PL_sv_no, 0); | |
e839e6ed | 1086 | } |
af390142 DM |
1087 | else |
1088 | sv_setsv_flags(left, right, 0); | |
1089 | SvGETMAGIC(right); | |
e839e6ed DM |
1090 | } |
1091 | } | |
e839e6ed | 1092 | |
af390142 DM |
1093 | /* nexttarg = left . right */ |
1094 | S_do_concat(aTHX_ left, right, nexttarg, 0); | |
1095 | left = nexttarg; | |
e839e6ed | 1096 | } |
e839e6ed | 1097 | |
af390142 | 1098 | SP = toparg - stack_adj + 1; |
e839e6ed | 1099 | |
4e521aaf DM |
1100 | /* Return the result of all RHS concats, unless this op includes |
1101 | * an assign ($lex = x.y.z or expr = x.y.z), in which case copy | |
1102 | * to target (which will be $lex or expr). | |
af390142 DM |
1103 | * If we are appending, targ will already have been appended to in |
1104 | * the loop */ | |
4e521aaf DM |
1105 | if ( !is_append |
1106 | && ( (PL_op->op_flags & OPf_STACKED) | |
1107 | || (PL_op->op_private & OPpTARGET_MY)) | |
1108 | ) { | |
af390142 DM |
1109 | sv_setsv(targ, left); |
1110 | SvSETMAGIC(targ); | |
1111 | } | |
4e521aaf DM |
1112 | else |
1113 | targ = left; | |
af390142 DM |
1114 | SETs(targ); |
1115 | RETURN; | |
1116 | } | |
e839e6ed DM |
1117 | } |
1118 | ||
1119 | ||
0b5aba47 DM |
1120 | /* push the elements of av onto the stack. |
1121 | * Returns PL_op->op_next to allow tail-call optimisation of its callers */ | |
d5524600 | 1122 | |
0b5aba47 | 1123 | STATIC OP* |
d5524600 DM |
1124 | S_pushav(pTHX_ AV* const av) |
1125 | { | |
1126 | dSP; | |
c70927a6 | 1127 | const SSize_t maxarg = AvFILL(av) + 1; |
d5524600 | 1128 | EXTEND(SP, maxarg); |
5d9574c1 | 1129 | if (UNLIKELY(SvRMAGICAL(av))) { |
c70927a6 FC |
1130 | PADOFFSET i; |
1131 | for (i=0; i < (PADOFFSET)maxarg; i++) { | |
fd77b29b FC |
1132 | SV ** const svp = av_fetch(av, i, FALSE); |
1133 | SP[i+1] = LIKELY(svp) | |
1134 | ? *svp | |
1135 | : UNLIKELY(PL_op->op_flags & OPf_MOD) | |
1f1dcfb5 | 1136 | ? av_nonelem(av,i) |
fd77b29b | 1137 | : &PL_sv_undef; |
d5524600 DM |
1138 | } |
1139 | } | |
1140 | else { | |
c70927a6 FC |
1141 | PADOFFSET i; |
1142 | for (i=0; i < (PADOFFSET)maxarg; i++) { | |
6661956a | 1143 | SV *sv = AvARRAY(av)[i]; |
fd77b29b FC |
1144 | SP[i+1] = LIKELY(sv) |
1145 | ? sv | |
1146 | : UNLIKELY(PL_op->op_flags & OPf_MOD) | |
1f1dcfb5 | 1147 | ? av_nonelem(av,i) |
fd77b29b | 1148 | : &PL_sv_undef; |
ce0d59fd | 1149 | } |
d5524600 DM |
1150 | } |
1151 | SP += maxarg; | |
1152 | PUTBACK; | |
0b5aba47 | 1153 | return NORMAL; |
d5524600 DM |
1154 | } |
1155 | ||
1156 | ||
a7fd8ef6 DM |
1157 | /* ($lex1,@lex2,...) or my ($lex1,@lex2,...) */ |
1158 | ||
1159 | PP(pp_padrange) | |
1160 | { | |
20b7effb | 1161 | dSP; |
a7fd8ef6 DM |
1162 | PADOFFSET base = PL_op->op_targ; |
1163 | int count = (int)(PL_op->op_private) & OPpPADRANGE_COUNTMASK; | |
d5524600 DM |
1164 | if (PL_op->op_flags & OPf_SPECIAL) { |
1165 | /* fake the RHS of my ($x,$y,..) = @_ */ | |
1166 | PUSHMARK(SP); | |
0b5aba47 | 1167 | (void)S_pushav(aTHX_ GvAVn(PL_defgv)); |
d5524600 DM |
1168 | SPAGAIN; |
1169 | } | |
1170 | ||
a7fd8ef6 DM |
1171 | /* note, this is only skipped for compile-time-known void cxt */ |
1172 | if ((PL_op->op_flags & OPf_WANT) != OPf_WANT_VOID) { | |
19742f39 AL |
1173 | int i; |
1174 | ||
a7fd8ef6 DM |
1175 | EXTEND(SP, count); |
1176 | PUSHMARK(SP); | |
1177 | for (i = 0; i <count; i++) | |
1178 | *++SP = PAD_SV(base+i); | |
1179 | } | |
1180 | if (PL_op->op_private & OPpLVAL_INTRO) { | |
4e09461c DM |
1181 | SV **svp = &(PAD_SVl(base)); |
1182 | const UV payload = (UV)( | |
1183 | (base << (OPpPADRANGE_COUNTSHIFT + SAVE_TIGHT_SHIFT)) | |
1184 | | (count << SAVE_TIGHT_SHIFT) | |
1185 | | SAVEt_CLEARPADRANGE); | |
19742f39 AL |
1186 | int i; |
1187 | ||
6d59e610 | 1188 | STATIC_ASSERT_STMT(OPpPADRANGE_COUNTMASK + 1 == (1 << OPpPADRANGE_COUNTSHIFT)); |
d081a355 DM |
1189 | assert((payload >> (OPpPADRANGE_COUNTSHIFT+SAVE_TIGHT_SHIFT)) |
1190 | == (Size_t)base); | |
a3444cc5 DM |
1191 | { |
1192 | dSS_ADD; | |
1193 | SS_ADD_UV(payload); | |
1194 | SS_ADD_END(1); | |
1195 | } | |
4e09461c | 1196 | |
a7fd8ef6 | 1197 | for (i = 0; i <count; i++) |
4e09461c | 1198 | SvPADSTALE_off(*svp++); /* mark lexical as active */ |
a7fd8ef6 DM |
1199 | } |
1200 | RETURN; | |
1201 | } | |
1202 | ||
1203 | ||
a0d0e21e LW |
1204 | PP(pp_padsv) |
1205 | { | |
20b7effb | 1206 | dSP; |
6c28b496 DD |
1207 | EXTEND(SP, 1); |
1208 | { | |
1209 | OP * const op = PL_op; | |
1210 | /* access PL_curpad once */ | |
1211 | SV ** const padentry = &(PAD_SVl(op->op_targ)); | |
1212 | { | |
1213 | dTARG; | |
1214 | TARG = *padentry; | |
1215 | PUSHs(TARG); | |
1216 | PUTBACK; /* no pop/push after this, TOPs ok */ | |
8ec5e241 | 1217 | } |
6c28b496 DD |
1218 | if (op->op_flags & OPf_MOD) { |
1219 | if (op->op_private & OPpLVAL_INTRO) | |
1220 | if (!(op->op_private & OPpPAD_STATE)) | |
1221 | save_clearsv(padentry); | |
1222 | if (op->op_private & OPpDEREF) { | |
8f90a16d FC |
1223 | /* TOPs is equivalent to TARG here. Using TOPs (SP) rather |
1224 | than TARG reduces the scope of TARG, so it does not | |
1225 | span the call to save_clearsv, resulting in smaller | |
1226 | machine code. */ | |
6c28b496 DD |
1227 | TOPs = vivify_ref(TOPs, op->op_private & OPpDEREF); |
1228 | } | |
1229 | } | |
1230 | return op->op_next; | |
4633a7c4 | 1231 | } |
a0d0e21e LW |
1232 | } |
1233 | ||
1234 | PP(pp_readline) | |
1235 | { | |
30901a8a | 1236 | dSP; |
12dc5f94 DM |
1237 | /* pp_coreargs pushes a NULL to indicate no args passed to |
1238 | * CORE::readline() */ | |
30901a8a FC |
1239 | if (TOPs) { |
1240 | SvGETMAGIC(TOPs); | |
fc99edcf | 1241 | tryAMAGICunTARGETlist(iter_amg, 0); |
30901a8a FC |
1242 | PL_last_in_gv = MUTABLE_GV(*PL_stack_sp--); |
1243 | } | |
1244 | else PL_last_in_gv = PL_argvgv, PL_stack_sp--; | |
6e592b3a BM |
1245 | if (!isGV_with_GP(PL_last_in_gv)) { |
1246 | if (SvROK(PL_last_in_gv) && isGV_with_GP(SvRV(PL_last_in_gv))) | |
159b6efe | 1247 | PL_last_in_gv = MUTABLE_GV(SvRV(PL_last_in_gv)); |
8efb3254 | 1248 | else { |
f5284f61 | 1249 | dSP; |
ad64d0ec | 1250 | XPUSHs(MUTABLE_SV(PL_last_in_gv)); |
f5284f61 | 1251 | PUTBACK; |
897d3989 | 1252 | Perl_pp_rv2gv(aTHX); |
159b6efe | 1253 | PL_last_in_gv = MUTABLE_GV(*PL_stack_sp--); |
745e740c | 1254 | assert((SV*)PL_last_in_gv == &PL_sv_undef || isGV_with_GP(PL_last_in_gv)); |
f5284f61 IZ |
1255 | } |
1256 | } | |
a0d0e21e LW |
1257 | return do_readline(); |
1258 | } | |
1259 | ||
1260 | PP(pp_eq) | |
1261 | { | |
20b7effb | 1262 | dSP; |
33efebe6 DM |
1263 | SV *left, *right; |
1264 | ||
0872de45 | 1265 | tryAMAGICbin_MG(eq_amg, AMGf_numeric); |
33efebe6 DM |
1266 | right = POPs; |
1267 | left = TOPs; | |
1268 | SETs(boolSV( | |
1269 | (SvIOK_notUV(left) && SvIOK_notUV(right)) | |
1270 | ? (SvIVX(left) == SvIVX(right)) | |
1271 | : ( do_ncmp(left, right) == 0) | |
1272 | )); | |
1273 | RETURN; | |
a0d0e21e LW |
1274 | } |
1275 | ||
b1c05ba5 | 1276 | |
4c2c3128 | 1277 | /* also used for: pp_i_preinc() */ |
b1c05ba5 | 1278 | |
a0d0e21e LW |
1279 | PP(pp_preinc) |
1280 | { | |
4c2c3128 DM |
1281 | SV *sv = *PL_stack_sp; |
1282 | ||
1283 | if (LIKELY(((sv->sv_flags & | |
1284 | (SVf_THINKFIRST|SVs_GMG|SVf_IVisUV| | |
1285 | SVf_IOK|SVf_NOK|SVf_POK|SVp_NOK|SVp_POK|SVf_ROK)) | |
1286 | == SVf_IOK)) | |
1287 | && SvIVX(sv) != IV_MAX) | |
1288 | { | |
1289 | SvIV_set(sv, SvIVX(sv) + 1); | |
1290 | } | |
1291 | else /* Do all the PERL_PRESERVE_IVUV and hard cases in sv_inc */ | |
1292 | sv_inc(sv); | |
1293 | SvSETMAGIC(sv); | |
1294 | return NORMAL; | |
1295 | } | |
1296 | ||
1297 | ||
1298 | /* also used for: pp_i_predec() */ | |
1299 | ||
1300 | PP(pp_predec) | |
1301 | { | |
1302 | SV *sv = *PL_stack_sp; | |
1303 | ||
1304 | if (LIKELY(((sv->sv_flags & | |
1305 | (SVf_THINKFIRST|SVs_GMG|SVf_IVisUV| | |
1306 | SVf_IOK|SVf_NOK|SVf_POK|SVp_NOK|SVp_POK|SVf_ROK)) | |
1307 | == SVf_IOK)) | |
1308 | && SvIVX(sv) != IV_MIN) | |
55497cff | 1309 | { |
4c2c3128 | 1310 | SvIV_set(sv, SvIVX(sv) - 1); |
748a9306 | 1311 | } |
4c2c3128 DM |
1312 | else /* Do all the PERL_PRESERVE_IVUV and hard cases in sv_dec */ |
1313 | sv_dec(sv); | |
1314 | SvSETMAGIC(sv); | |
a0d0e21e LW |
1315 | return NORMAL; |
1316 | } | |
1317 | ||
b1c05ba5 DM |
1318 | |
1319 | /* also used for: pp_orassign() */ | |
1320 | ||
a0d0e21e LW |
1321 | PP(pp_or) |
1322 | { | |
20b7effb | 1323 | dSP; |
f4c975aa | 1324 | SV *sv; |
f410a211 | 1325 | PERL_ASYNC_CHECK(); |
f4c975aa DM |
1326 | sv = TOPs; |
1327 | if (SvTRUE_NN(sv)) | |
a0d0e21e LW |
1328 | RETURN; |
1329 | else { | |
c960fc3b SP |
1330 | if (PL_op->op_type == OP_OR) |
1331 | --SP; | |
a0d0e21e LW |
1332 | RETURNOP(cLOGOP->op_other); |
1333 | } | |
1334 | } | |
1335 | ||
b1c05ba5 DM |
1336 | |
1337 | /* also used for: pp_dor() pp_dorassign() */ | |
1338 | ||
25a55bd7 | 1339 | PP(pp_defined) |
c963b151 | 1340 | { |
20b7effb | 1341 | dSP; |
eb578fdb | 1342 | SV* sv; |
6136c704 | 1343 | bool defined; |
25a55bd7 | 1344 | const int op_type = PL_op->op_type; |
ea5195b7 | 1345 | const bool is_dor = (op_type == OP_DOR || op_type == OP_DORASSIGN); |
c963b151 | 1346 | |
6136c704 | 1347 | if (is_dor) { |
f410a211 | 1348 | PERL_ASYNC_CHECK(); |
25a55bd7 | 1349 | sv = TOPs; |
5d9574c1 | 1350 | if (UNLIKELY(!sv || !SvANY(sv))) { |
2bd49cfc NC |
1351 | if (op_type == OP_DOR) |
1352 | --SP; | |
25a55bd7 SP |
1353 | RETURNOP(cLOGOP->op_other); |
1354 | } | |
b7c44293 RGS |
1355 | } |
1356 | else { | |
1357 | /* OP_DEFINED */ | |
25a55bd7 | 1358 | sv = POPs; |
5d9574c1 | 1359 | if (UNLIKELY(!sv || !SvANY(sv))) |
25a55bd7 | 1360 | RETPUSHNO; |
b7c44293 | 1361 | } |
25a55bd7 | 1362 | |
6136c704 | 1363 | defined = FALSE; |
c963b151 BD |
1364 | switch (SvTYPE(sv)) { |
1365 | case SVt_PVAV: | |
1366 | if (AvMAX(sv) >= 0 || SvGMAGICAL(sv) || (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied))) | |
25a55bd7 | 1367 | defined = TRUE; |
c963b151 BD |
1368 | break; |
1369 | case SVt_PVHV: | |
1370 | if (HvARRAY(sv) || SvGMAGICAL(sv) || (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied))) | |
25a55bd7 | 1371 | defined = TRUE; |
c963b151 BD |
1372 | break; |
1373 | case SVt_PVCV: | |
1374 | if (CvROOT(sv) || CvXSUB(sv)) | |
25a55bd7 | 1375 | defined = TRUE; |
c963b151 BD |
1376 | break; |
1377 | default: | |
5b295bef | 1378 | SvGETMAGIC(sv); |
c963b151 | 1379 | if (SvOK(sv)) |
25a55bd7 | 1380 | defined = TRUE; |
6136c704 | 1381 | break; |
c963b151 | 1382 | } |
6136c704 AL |
1383 | |
1384 | if (is_dor) { | |
c960fc3b SP |
1385 | if(defined) |
1386 | RETURN; | |
1387 | if(op_type == OP_DOR) | |
1388 | --SP; | |
25a55bd7 | 1389 | RETURNOP(cLOGOP->op_other); |
25a55bd7 | 1390 | } |
d9aa96a4 SP |
1391 | /* assuming OP_DEFINED */ |
1392 | if(defined) | |
1393 | RETPUSHYES; | |
1394 | RETPUSHNO; | |
c963b151 BD |
1395 | } |
1396 | ||
230ee21f DM |
1397 | |
1398 | ||
a0d0e21e LW |
1399 | PP(pp_add) |
1400 | { | |
20b7effb | 1401 | dSP; dATARGET; bool useleft; SV *svl, *svr; |
230ee21f | 1402 | |
6f1401dc DM |
1403 | tryAMAGICbin_MG(add_amg, AMGf_assign|AMGf_numeric); |
1404 | svr = TOPs; | |
1405 | svl = TOPm1s; | |
1406 | ||
28e5dec8 | 1407 | #ifdef PERL_PRESERVE_IVUV |
230ee21f DM |
1408 | |
1409 | /* special-case some simple common cases */ | |
1410 | if (!((svl->sv_flags|svr->sv_flags) & (SVf_IVisUV|SVs_GMG))) { | |
1411 | IV il, ir; | |
1412 | U32 flags = (svl->sv_flags & svr->sv_flags); | |
1413 | if (flags & SVf_IOK) { | |
1414 | /* both args are simple IVs */ | |
1415 | UV topl, topr; | |
1416 | il = SvIVX(svl); | |
1417 | ir = SvIVX(svr); | |
1418 | do_iv: | |
1419 | topl = ((UV)il) >> (UVSIZE * 8 - 2); | |
1420 | topr = ((UV)ir) >> (UVSIZE * 8 - 2); | |
1421 | ||
1422 | /* if both are in a range that can't under/overflow, do a | |
1423 | * simple integer add: if the top of both numbers | |
1424 | * are 00 or 11, then it's safe */ | |
1425 | if (!( ((topl+1) | (topr+1)) & 2)) { | |
1426 | SP--; | |
1427 | TARGi(il + ir, 0); /* args not GMG, so can't be tainted */ | |
1428 | SETs(TARG); | |
1429 | RETURN; | |
1430 | } | |
1431 | goto generic; | |
1432 | } | |
1433 | else if (flags & SVf_NOK) { | |
1434 | /* both args are NVs */ | |
1435 | NV nl = SvNVX(svl); | |
1436 | NV nr = SvNVX(svr); | |
1437 | ||
3336af0b DD |
1438 | if ( |
1439 | #if defined(NAN_COMPARE_BROKEN) && defined(Perl_isnan) | |
1440 | !Perl_isnan(nl) && nl == (NV)(il = (IV)nl) | |
1441 | && !Perl_isnan(nr) && nr == (NV)(ir = (IV)nr) | |
1442 | #else | |
1443 | nl == (NV)(il = (IV)nl) && nr == (NV)(ir = (IV)nr) | |
1444 | #endif | |
1445 | ) | |
230ee21f DM |
1446 | /* nothing was lost by converting to IVs */ |
1447 | goto do_iv; | |
1448 | SP--; | |
1449 | TARGn(nl + nr, 0); /* args not GMG, so can't be tainted */ | |
1450 | SETs(TARG); | |
1451 | RETURN; | |
1452 | } | |
1453 | } | |
1454 | ||
1455 | generic: | |
1456 | ||
1457 | useleft = USE_LEFT(svl); | |
28e5dec8 JH |
1458 | /* We must see if we can perform the addition with integers if possible, |
1459 | as the integer code detects overflow while the NV code doesn't. | |
1460 | If either argument hasn't had a numeric conversion yet attempt to get | |
1461 | the IV. It's important to do this now, rather than just assuming that | |
1462 | it's not IOK as a PV of "9223372036854775806" may not take well to NV | |
1463 | addition, and an SV which is NOK, NV=6.0 ought to be coerced to | |
1464 | integer in case the second argument is IV=9223372036854775806 | |
1465 | We can (now) rely on sv_2iv to do the right thing, only setting the | |
1466 | public IOK flag if the value in the NV (or PV) slot is truly integer. | |
1467 | ||
1468 | A side effect is that this also aggressively prefers integer maths over | |
7dca457a NC |
1469 | fp maths for integer values. |
1470 | ||
a00b5bd3 | 1471 | How to detect overflow? |
7dca457a NC |
1472 | |
1473 | C 99 section 6.2.6.1 says | |
1474 | ||
1475 | The range of nonnegative values of a signed integer type is a subrange | |
1476 | of the corresponding unsigned integer type, and the representation of | |
1477 | the same value in each type is the same. A computation involving | |
1478 | unsigned operands can never overflow, because a result that cannot be | |
1479 | represented by the resulting unsigned integer type is reduced modulo | |
1480 | the number that is one greater than the largest value that can be | |
1481 | represented by the resulting type. | |
1482 | ||
1483 | (the 9th paragraph) | |
1484 | ||
1485 | which I read as "unsigned ints wrap." | |
1486 | ||
1487 | signed integer overflow seems to be classed as "exception condition" | |
1488 | ||
1489 | If an exceptional condition occurs during the evaluation of an | |
1490 | expression (that is, if the result is not mathematically defined or not | |
1491 | in the range of representable values for its type), the behavior is | |
1492 | undefined. | |
1493 | ||
1494 | (6.5, the 5th paragraph) | |
1495 | ||
1496 | I had assumed that on 2s complement machines signed arithmetic would | |
1497 | wrap, hence coded pp_add and pp_subtract on the assumption that | |
1498 | everything perl builds on would be happy. After much wailing and | |
1499 | gnashing of teeth it would seem that irix64 knows its ANSI spec well, | |
1500 | knows that it doesn't need to, and doesn't. Bah. Anyway, the all- | |
1501 | unsigned code below is actually shorter than the old code. :-) | |
1502 | */ | |
1503 | ||
01f91bf2 | 1504 | if (SvIV_please_nomg(svr)) { |
28e5dec8 JH |
1505 | /* Unless the left argument is integer in range we are going to have to |
1506 | use NV maths. Hence only attempt to coerce the right argument if | |
1507 | we know the left is integer. */ | |
eb578fdb | 1508 | UV auv = 0; |
9c5ffd7c | 1509 | bool auvok = FALSE; |
7dca457a NC |
1510 | bool a_valid = 0; |
1511 | ||
28e5dec8 | 1512 | if (!useleft) { |
7dca457a NC |
1513 | auv = 0; |
1514 | a_valid = auvok = 1; | |
1515 | /* left operand is undef, treat as zero. + 0 is identity, | |
1516 | Could SETi or SETu right now, but space optimise by not adding | |
1517 | lots of code to speed up what is probably a rarish case. */ | |
1518 | } else { | |
1519 | /* Left operand is defined, so is it IV? */ | |
01f91bf2 | 1520 | if (SvIV_please_nomg(svl)) { |
800401ee JH |
1521 | if ((auvok = SvUOK(svl))) |
1522 | auv = SvUVX(svl); | |
7dca457a | 1523 | else { |
eb578fdb | 1524 | const IV aiv = SvIVX(svl); |
7dca457a NC |
1525 | if (aiv >= 0) { |
1526 | auv = aiv; | |
1527 | auvok = 1; /* Now acting as a sign flag. */ | |
53e2bfb7 | 1528 | } else { |
9354a41f KW |
1529 | /* Using 0- here and later to silence bogus warning |
1530 | * from MS VC */ | |
1531 | auv = (UV) (0 - (UV) aiv); | |
7dca457a NC |
1532 | } |
1533 | } | |
1534 | a_valid = 1; | |
28e5dec8 JH |
1535 | } |
1536 | } | |
7dca457a NC |
1537 | if (a_valid) { |
1538 | bool result_good = 0; | |
1539 | UV result; | |
eb578fdb | 1540 | UV buv; |
800401ee | 1541 | bool buvok = SvUOK(svr); |
a00b5bd3 | 1542 | |
7dca457a | 1543 | if (buvok) |
800401ee | 1544 | buv = SvUVX(svr); |
7dca457a | 1545 | else { |
eb578fdb | 1546 | const IV biv = SvIVX(svr); |
7dca457a NC |
1547 | if (biv >= 0) { |
1548 | buv = biv; | |
1549 | buvok = 1; | |
1550 | } else | |
9354a41f | 1551 | buv = (UV) (0 - (UV) biv); |
7dca457a NC |
1552 | } |
1553 | /* ?uvok if value is >= 0. basically, flagged as UV if it's +ve, | |
602f51c4 | 1554 | else "IV" now, independent of how it came in. |
7dca457a NC |
1555 | if a, b represents positive, A, B negative, a maps to -A etc |
1556 | a + b => (a + b) | |
1557 | A + b => -(a - b) | |
1558 | a + B => (a - b) | |
1559 | A + B => -(a + b) | |
1560 | all UV maths. negate result if A negative. | |
1561 | add if signs same, subtract if signs differ. */ | |
1562 | ||
1563 | if (auvok ^ buvok) { | |
1564 | /* Signs differ. */ | |
1565 | if (auv >= buv) { | |
1566 | result = auv - buv; | |
1567 | /* Must get smaller */ | |
1568 | if (result <= auv) | |
1569 | result_good = 1; | |
1570 | } else { | |
1571 | result = buv - auv; | |
1572 | if (result <= buv) { | |
1573 | /* result really should be -(auv-buv). as its negation | |
1574 | of true value, need to swap our result flag */ | |
1575 | auvok = !auvok; | |
1576 | result_good = 1; | |
28e5dec8 JH |
1577 | } |
1578 | } | |
7dca457a NC |
1579 | } else { |
1580 | /* Signs same */ | |
1581 | result = auv + buv; | |
1582 | if (result >= auv) | |
1583 | result_good = 1; | |
1584 | } | |
1585 | if (result_good) { | |
1586 | SP--; | |
1587 | if (auvok) | |
28e5dec8 | 1588 | SETu( result ); |
7dca457a NC |
1589 | else { |
1590 | /* Negate result */ | |
1591 | if (result <= (UV)IV_MIN) | |
53e2bfb7 DM |
1592 | SETi(result == (UV)IV_MIN |
1593 | ? IV_MIN : -(IV)result); | |
7dca457a NC |
1594 | else { |
1595 | /* result valid, but out of range for IV. */ | |
1596 | SETn( -(NV)result ); | |
28e5dec8 JH |
1597 | } |
1598 | } | |
7dca457a NC |
1599 | RETURN; |
1600 | } /* Overflow, drop through to NVs. */ | |
28e5dec8 JH |
1601 | } |
1602 | } | |
230ee21f DM |
1603 | |
1604 | #else | |
1605 | useleft = USE_LEFT(svl); | |
28e5dec8 | 1606 | #endif |
230ee21f | 1607 | |
a0d0e21e | 1608 | { |
6f1401dc | 1609 | NV value = SvNV_nomg(svr); |
4efa5a16 | 1610 | (void)POPs; |
28e5dec8 JH |
1611 | if (!useleft) { |
1612 | /* left operand is undef, treat as zero. + 0.0 is identity. */ | |
1613 | SETn(value); | |
1614 | RETURN; | |
1615 | } | |
6f1401dc | 1616 | SETn( value + SvNV_nomg(svl) ); |
28e5dec8 | 1617 | RETURN; |
a0d0e21e LW |
1618 | } |
1619 | } | |
1620 | ||
b1c05ba5 DM |
1621 | |
1622 | /* also used for: pp_aelemfast_lex() */ | |
1623 | ||
a0d0e21e LW |
1624 | PP(pp_aelemfast) |
1625 | { | |
20b7effb | 1626 | dSP; |
93bad3fd | 1627 | AV * const av = PL_op->op_type == OP_AELEMFAST_LEX |
8f878375 | 1628 | ? MUTABLE_AV(PAD_SV(PL_op->op_targ)) : GvAVn(cGVOP_gv); |
a3b680e6 | 1629 | const U32 lval = PL_op->op_flags & OPf_MOD; |
7e169e84 DM |
1630 | const I8 key = (I8)PL_op->op_private; |
1631 | SV** svp; | |
1632 | SV *sv; | |
1633 | ||
1634 | assert(SvTYPE(av) == SVt_PVAV); | |
1635 | ||
f4484b87 DM |
1636 | EXTEND(SP, 1); |
1637 | ||
7e169e84 DM |
1638 | /* inlined av_fetch() for simple cases ... */ |
1639 | if (!SvRMAGICAL(av) && key >= 0 && key <= AvFILLp(av)) { | |
1640 | sv = AvARRAY(av)[key]; | |
9fb994be | 1641 | if (sv) { |
7e169e84 DM |
1642 | PUSHs(sv); |
1643 | RETURN; | |
1644 | } | |
1645 | } | |
1646 | ||
1647 | /* ... else do it the hard way */ | |
1648 | svp = av_fetch(av, key, lval); | |
1649 | sv = (svp ? *svp : &PL_sv_undef); | |
b024352e DM |
1650 | |
1651 | if (UNLIKELY(!svp && lval)) | |
7e169e84 | 1652 | DIE(aTHX_ PL_no_aelem, (int)key); |
b024352e | 1653 | |
39cf747a | 1654 | if (!lval && SvRMAGICAL(av) && SvGMAGICAL(sv)) /* see note in pp_helem() */ |
fd69380d | 1655 | mg_get(sv); |
be6c24e0 | 1656 | PUSHs(sv); |
a0d0e21e LW |
1657 | RETURN; |
1658 | } | |
1659 | ||
1660 | PP(pp_join) | |
1661 | { | |
20b7effb | 1662 | dSP; dMARK; dTARGET; |
a0d0e21e LW |
1663 | MARK++; |
1664 | do_join(TARG, *MARK, MARK, SP); | |
1665 | SP = MARK; | |
1666 | SETs(TARG); | |
1667 | RETURN; | |
1668 | } | |
1669 | ||
a0d0e21e LW |
1670 | /* Oversized hot code. */ |
1671 | ||
b1c05ba5 DM |
1672 | /* also used for: pp_say() */ |
1673 | ||
a0d0e21e LW |
1674 | PP(pp_print) |
1675 | { | |
20b7effb | 1676 | dSP; dMARK; dORIGMARK; |
eb578fdb | 1677 | PerlIO *fp; |
236988e4 | 1678 | MAGIC *mg; |
159b6efe NC |
1679 | GV * const gv |
1680 | = (PL_op->op_flags & OPf_STACKED) ? MUTABLE_GV(*++MARK) : PL_defoutgv; | |
9c9f25b8 | 1681 | IO *io = GvIO(gv); |
5b468f54 | 1682 | |
9c9f25b8 | 1683 | if (io |
ad64d0ec | 1684 | && (mg = SvTIED_mg((const SV *)io, PERL_MAGIC_tiedscalar))) |
5b468f54 | 1685 | { |
01bb7c6d | 1686 | had_magic: |
68dc0745 | 1687 | if (MARK == ORIGMARK) { |
1c846c1f | 1688 | /* If using default handle then we need to make space to |
a60c0954 NIS |
1689 | * pass object as 1st arg, so move other args up ... |
1690 | */ | |
4352c267 | 1691 | MEXTEND(SP, 1); |
68dc0745 | 1692 | ++MARK; |
1693 | Move(MARK, MARK + 1, (SP - MARK) + 1, SV*); | |
1694 | ++SP; | |
1695 | } | |
3e0cb5de | 1696 | return Perl_tied_method(aTHX_ SV_CONST(PRINT), mark - 1, MUTABLE_SV(io), |
94bc412f NC |
1697 | mg, |
1698 | (G_SCALAR | TIED_METHOD_ARGUMENTS_ON_STACK | |
1699 | | (PL_op->op_type == OP_SAY | |
1700 | ? TIED_METHOD_SAY : 0)), sp - mark); | |
236988e4 | 1701 | } |
9c9f25b8 | 1702 | if (!io) { |
68b590d9 | 1703 | if ( gv && GvEGVx(gv) && (io = GvIO(GvEGV(gv))) |
ad64d0ec | 1704 | && (mg = SvTIED_mg((const SV *)io, PERL_MAGIC_tiedscalar))) |
01bb7c6d | 1705 | goto had_magic; |
51087808 | 1706 | report_evil_fh(gv); |
93189314 | 1707 | SETERRNO(EBADF,RMS_IFI); |
a0d0e21e LW |
1708 | goto just_say_no; |
1709 | } | |
1710 | else if (!(fp = IoOFP(io))) { | |
7716c5c5 NC |
1711 | if (IoIFP(io)) |
1712 | report_wrongway_fh(gv, '<'); | |
51087808 | 1713 | else |
7716c5c5 | 1714 | report_evil_fh(gv); |
93189314 | 1715 | SETERRNO(EBADF,IoIFP(io)?RMS_FAC:RMS_IFI); |
a0d0e21e LW |
1716 | goto just_say_no; |
1717 | } | |
1718 | else { | |
e23d9e2f | 1719 | SV * const ofs = GvSV(PL_ofsgv); /* $, */ |
a0d0e21e | 1720 | MARK++; |
e23d9e2f | 1721 | if (ofs && (SvGMAGICAL(ofs) || SvOK(ofs))) { |
a0d0e21e LW |
1722 | while (MARK <= SP) { |
1723 | if (!do_print(*MARK, fp)) | |
1724 | break; | |
1725 | MARK++; | |
1726 | if (MARK <= SP) { | |
e23d9e2f CS |
1727 | /* don't use 'ofs' here - it may be invalidated by magic callbacks */ |
1728 | if (!do_print(GvSV(PL_ofsgv), fp)) { | |
a0d0e21e LW |
1729 | MARK--; |
1730 | break; | |
1731 | } | |
1732 | } | |
1733 | } | |
1734 | } | |
1735 | else { | |
1736 | while (MARK <= SP) { | |
1737 | if (!do_print(*MARK, fp)) | |
1738 | break; | |
1739 | MARK++; | |
1740 | } | |
1741 | } | |
1742 | if (MARK <= SP) | |
1743 | goto just_say_no; | |
1744 | else { | |
cfc4a7da GA |
1745 | if (PL_op->op_type == OP_SAY) { |
1746 | if (PerlIO_write(fp, "\n", 1) == 0 || PerlIO_error(fp)) | |
1747 | goto just_say_no; | |
1748 | } | |
1749 | else if (PL_ors_sv && SvOK(PL_ors_sv)) | |
7889fe52 | 1750 | if (!do_print(PL_ors_sv, fp)) /* $\ */ |
a0d0e21e LW |
1751 | goto just_say_no; |
1752 | ||
1753 | if (IoFLAGS(io) & IOf_FLUSH) | |
760ac839 | 1754 | if (PerlIO_flush(fp) == EOF) |
a0d0e21e LW |
1755 | goto just_say_no; |
1756 | } | |
1757 | } | |
1758 | SP = ORIGMARK; | |
e52fd6f4 | 1759 | XPUSHs(&PL_sv_yes); |
a0d0e21e LW |
1760 | RETURN; |
1761 | ||
1762 | just_say_no: | |
1763 | SP = ORIGMARK; | |
e52fd6f4 | 1764 | XPUSHs(&PL_sv_undef); |
a0d0e21e LW |
1765 | RETURN; |
1766 | } | |
1767 | ||
b1c05ba5 | 1768 | |
aa36782f DM |
1769 | /* do the common parts of pp_padhv() and pp_rv2hv() |
1770 | * It assumes the caller has done EXTEND(SP, 1) or equivalent. | |
af3b1cba | 1771 | * 'is_keys' indicates the OPpPADHV_ISKEYS/OPpRV2HV_ISKEYS flag is set. |
e84e4286 DM |
1772 | * 'has_targ' indicates that the op has a target - this should |
1773 | * be a compile-time constant so that the code can constant-folded as | |
1774 | * appropriate | |
aa36782f DM |
1775 | * */ |
1776 | ||
1777 | PERL_STATIC_INLINE OP* | |
e84e4286 | 1778 | S_padhv_rv2hv_common(pTHX_ HV *hv, U8 gimme, bool is_keys, bool has_targ) |
aa36782f | 1779 | { |
e80717e7 DM |
1780 | bool is_tied; |
1781 | bool is_bool; | |
e1ad5d4c | 1782 | MAGIC *mg; |
aa36782f | 1783 | dSP; |
e80717e7 DM |
1784 | IV i; |
1785 | SV *sv; | |
aa36782f DM |
1786 | |
1787 | assert(PL_op->op_type == OP_PADHV || PL_op->op_type == OP_RV2HV); | |
1788 | ||
1789 | if (gimme == G_ARRAY) { | |
8dc9003f | 1790 | hv_pushkv(hv, 3); |
af3b1cba | 1791 | return NORMAL; |
aa36782f DM |
1792 | } |
1793 | ||
1794 | if (is_keys) | |
1795 | /* 'keys %h' masquerading as '%h': reset iterator */ | |
1796 | (void)hv_iterinit(hv); | |
1797 | ||
6f2dc9a6 DM |
1798 | if (gimme == G_VOID) |
1799 | return NORMAL; | |
1800 | ||
e80717e7 DM |
1801 | is_bool = ( PL_op->op_private & OPpTRUEBOOL |
1802 | || ( PL_op->op_private & OPpMAYBE_TRUEBOOL | |
1803 | && block_gimme() == G_VOID)); | |
1804 | is_tied = SvRMAGICAL(hv) && (mg = mg_find(MUTABLE_SV(hv), PERL_MAGIC_tied)); | |
1805 | ||
1806 | if (UNLIKELY(is_tied)) { | |
1807 | if (is_keys && !is_bool) { | |
1808 | i = 0; | |
1809 | while (hv_iternext(hv)) | |
1810 | i++; | |
1811 | goto push_i; | |
1812 | } | |
1813 | else { | |
1814 | sv = magic_scalarpack(hv, mg); | |
1815 | goto push_sv; | |
1816 | } | |
3cd2c7d4 | 1817 | } |
e80717e7 DM |
1818 | else { |
1819 | i = HvUSEDKEYS(hv); | |
1820 | if (is_bool) { | |
1821 | sv = i ? &PL_sv_yes : &PL_sv_zero; | |
1822 | push_sv: | |
1823 | PUSHs(sv); | |
1824 | } | |
1825 | else { | |
1826 | push_i: | |
e84e4286 DM |
1827 | if (has_targ) { |
1828 | dTARGET; | |
1829 | PUSHi(i); | |
1830 | } | |
1831 | else | |
6f2dc9a6 DM |
1832 | if (is_keys) { |
1833 | /* parent op should be an unused OP_KEYS whose targ we can | |
1834 | * use */ | |
1835 | dTARG; | |
1836 | OP *k; | |
1837 | ||
1838 | assert(!OpHAS_SIBLING(PL_op)); | |
1839 | k = PL_op->op_sibparent; | |
1840 | assert(k->op_type == OP_KEYS); | |
1841 | TARG = PAD_SV(k->op_targ); | |
1842 | PUSHi(i); | |
1843 | } | |
1844 | else | |
e84e4286 | 1845 | mPUSHi(i); |
aa36782f | 1846 | } |
aa36782f DM |
1847 | } |
1848 | ||
1849 | PUTBACK; | |
1850 | return NORMAL; | |
1851 | } | |
1852 | ||
1853 | ||
e855b461 DM |
1854 | /* This is also called directly by pp_lvavref. */ |
1855 | PP(pp_padav) | |
1856 | { | |
1857 | dSP; dTARGET; | |
1858 | U8 gimme; | |
1859 | assert(SvTYPE(TARG) == SVt_PVAV); | |
1860 | if (UNLIKELY( PL_op->op_private & OPpLVAL_INTRO )) | |
1861 | if (LIKELY( !(PL_op->op_private & OPpPAD_STATE) )) | |
1862 | SAVECLEARSV(PAD_SVl(PL_op->op_targ)); | |
1863 | EXTEND(SP, 1); | |
1864 | ||
1865 | if (PL_op->op_flags & OPf_REF) { | |
1866 | PUSHs(TARG); | |
1867 | RETURN; | |
1868 | } | |
1869 | else if (PL_op->op_private & OPpMAYBE_LVSUB) { | |
1870 | const I32 flags = is_lvalue_sub(); | |
1871 | if (flags && !(flags & OPpENTERSUB_INARGS)) { | |
1872 | if (GIMME_V == G_SCALAR) | |
1873 | /* diag_listed_as: Can't return %s to lvalue scalar context */ | |
1874 | Perl_croak(aTHX_ "Can't return array to lvalue scalar context"); | |
1875 | PUSHs(TARG); | |
1876 | RETURN; | |
1877 | } | |
1878 | } | |
1879 | ||
1880 | gimme = GIMME_V; | |
0b5aba47 DM |
1881 | if (gimme == G_ARRAY) |
1882 | return S_pushav(aTHX_ (AV*)TARG); | |
327c9b9e DM |
1883 | |
1884 | if (gimme == G_SCALAR) { | |
e855b461 DM |
1885 | const SSize_t maxarg = AvFILL(MUTABLE_AV(TARG)) + 1; |
1886 | if (!maxarg) | |
1887 | PUSHs(&PL_sv_zero); | |
1888 | else if (PL_op->op_private & OPpTRUEBOOL) | |
1889 | PUSHs(&PL_sv_yes); | |
1890 | else | |
1891 | mPUSHi(maxarg); | |
1892 | } | |
1893 | RETURN; | |
1894 | } | |
1895 | ||
1896 | ||
1897 | PP(pp_padhv) | |
1898 | { | |
1899 | dSP; dTARGET; | |
1900 | U8 gimme; | |
e855b461 DM |
1901 | |
1902 | assert(SvTYPE(TARG) == SVt_PVHV); | |
e855b461 DM |
1903 | if (UNLIKELY( PL_op->op_private & OPpLVAL_INTRO )) |
1904 | if (LIKELY( !(PL_op->op_private & OPpPAD_STATE) )) | |
1905 | SAVECLEARSV(PAD_SVl(PL_op->op_targ)); | |
1906 | ||
aa36782f DM |
1907 | EXTEND(SP, 1); |
1908 | ||
1909 | if (PL_op->op_flags & OPf_REF) { | |
1910 | PUSHs(TARG); | |
e855b461 | 1911 | RETURN; |
aa36782f | 1912 | } |
e855b461 DM |
1913 | else if (PL_op->op_private & OPpMAYBE_LVSUB) { |
1914 | const I32 flags = is_lvalue_sub(); | |
1915 | if (flags && !(flags & OPpENTERSUB_INARGS)) { | |
1916 | if (GIMME_V == G_SCALAR) | |
1917 | /* diag_listed_as: Can't return %s to lvalue scalar context */ | |
1918 | Perl_croak(aTHX_ "Can't return hash to lvalue scalar context"); | |
aa36782f | 1919 | PUSHs(TARG); |
e855b461 DM |
1920 | RETURN; |
1921 | } | |
1922 | } | |
1923 | ||
1924 | gimme = GIMME_V; | |
e855b461 | 1925 | |
aa36782f | 1926 | return S_padhv_rv2hv_common(aTHX_ (HV*)TARG, gimme, |
e84e4286 DM |
1927 | cBOOL(PL_op->op_private & OPpPADHV_ISKEYS), |
1928 | 0 /* has_targ*/); | |
e855b461 DM |
1929 | } |
1930 | ||
1931 | ||
b1c05ba5 | 1932 | /* also used for: pp_rv2hv() */ |
bdaf10a5 | 1933 | /* also called directly by pp_lvavref */ |
b1c05ba5 | 1934 | |
a0d0e21e LW |
1935 | PP(pp_rv2av) |
1936 | { | |
20b7effb | 1937 | dSP; dTOPss; |
1c23e2bd | 1938 | const U8 gimme = GIMME_V; |
13c59d41 MH |
1939 | static const char an_array[] = "an ARRAY"; |
1940 | static const char a_hash[] = "a HASH"; | |
bdaf10a5 FC |
1941 | const bool is_pp_rv2av = PL_op->op_type == OP_RV2AV |
1942 | || PL_op->op_type == OP_LVAVREF; | |
d83b45b8 | 1943 | const svtype type = is_pp_rv2av ? SVt_PVAV : SVt_PVHV; |
a0d0e21e | 1944 | |
9026059d | 1945 | SvGETMAGIC(sv); |
a0d0e21e | 1946 | if (SvROK(sv)) { |
5d9574c1 | 1947 | if (UNLIKELY(SvAMAGIC(sv))) { |
93d7320b | 1948 | sv = amagic_deref_call(sv, is_pp_rv2av ? to_av_amg : to_hv_amg); |
93d7320b | 1949 | } |
17ab7946 | 1950 | sv = SvRV(sv); |
5d9574c1 | 1951 | if (UNLIKELY(SvTYPE(sv) != type)) |
dcbac5bb | 1952 | /* diag_listed_as: Not an ARRAY reference */ |
13c59d41 | 1953 | DIE(aTHX_ "Not %s reference", is_pp_rv2av ? an_array : a_hash); |
5d9574c1 DM |
1954 | else if (UNLIKELY(PL_op->op_flags & OPf_MOD |
1955 | && PL_op->op_private & OPpLVAL_INTRO)) | |
3da99855 | 1956 | Perl_croak(aTHX_ "%s", PL_no_localize_ref); |
a0d0e21e | 1957 | } |
5d9574c1 | 1958 | else if (UNLIKELY(SvTYPE(sv) != type)) { |
67955e0c | 1959 | GV *gv; |
1c846c1f | 1960 | |
6e592b3a | 1961 | if (!isGV_with_GP(sv)) { |
13c59d41 | 1962 | gv = Perl_softref2xv(aTHX_ sv, is_pp_rv2av ? an_array : a_hash, |
dc3c76f8 NC |
1963 | type, &sp); |
1964 | if (!gv) | |
1965 | RETURN; | |
35cd451c GS |
1966 | } |
1967 | else { | |
159b6efe | 1968 | gv = MUTABLE_GV(sv); |
a0d0e21e | 1969 | } |
ad64d0ec | 1970 | sv = is_pp_rv2av ? MUTABLE_SV(GvAVn(gv)) : MUTABLE_SV(GvHVn(gv)); |
533c011a | 1971 | if (PL_op->op_private & OPpLVAL_INTRO) |
ad64d0ec | 1972 | sv = is_pp_rv2av ? MUTABLE_SV(save_ary(gv)) : MUTABLE_SV(save_hash(gv)); |
9f527363 FC |
1973 | } |
1974 | if (PL_op->op_flags & OPf_REF) { | |
17ab7946 | 1975 | SETs(sv); |
a0d0e21e | 1976 | RETURN; |
9f527363 | 1977 | } |
5d9574c1 | 1978 | else if (UNLIKELY(PL_op->op_private & OPpMAYBE_LVSUB)) { |
40c94d11 FC |
1979 | const I32 flags = is_lvalue_sub(); |
1980 | if (flags && !(flags & OPpENTERSUB_INARGS)) { | |
cde874ca | 1981 | if (gimme != G_ARRAY) |
042560a6 | 1982 | goto croak_cant_return; |
17ab7946 | 1983 | SETs(sv); |
78f9721b | 1984 | RETURN; |
40c94d11 | 1985 | } |
a0d0e21e LW |
1986 | } |
1987 | ||
17ab7946 | 1988 | if (is_pp_rv2av) { |
502c6561 | 1989 | AV *const av = MUTABLE_AV(sv); |
0b5aba47 | 1990 | |
96913b52 | 1991 | if (gimme == G_ARRAY) { |
d5524600 DM |
1992 | SP--; |
1993 | PUTBACK; | |
0b5aba47 | 1994 | return S_pushav(aTHX_ av); |
1c846c1f | 1995 | } |
0b5aba47 DM |
1996 | |
1997 | if (gimme == G_SCALAR) { | |
c70927a6 | 1998 | const SSize_t maxarg = AvFILL(av) + 1; |
7be75ccf DM |
1999 | if (PL_op->op_private & OPpTRUEBOOL) |
2000 | SETs(maxarg ? &PL_sv_yes : &PL_sv_zero); | |
2001 | else { | |
2002 | dTARGET; | |
2003 | SETi(maxarg); | |
2004 | } | |
93965878 | 2005 | } |
7be75ccf DM |
2006 | } |
2007 | else { | |
aa36782f DM |
2008 | SP--; PUTBACK; |
2009 | return S_padhv_rv2hv_common(aTHX_ (HV*)sv, gimme, | |
e84e4286 DM |
2010 | cBOOL(PL_op->op_private & OPpRV2HV_ISKEYS), |
2011 | 1 /* has_targ*/); | |
17ab7946 | 2012 | } |
be85d344 | 2013 | RETURN; |
042560a6 NC |
2014 | |
2015 | croak_cant_return: | |
2016 | Perl_croak(aTHX_ "Can't return %s to lvalue scalar context", | |
2017 | is_pp_rv2av ? "array" : "hash"); | |
77e217c6 | 2018 | RETURN; |
a0d0e21e LW |
2019 | } |
2020 | ||
10c8fecd | 2021 | STATIC void |
fb8f4cf8 | 2022 | S_do_oddball(pTHX_ SV **oddkey, SV **firstkey) |
10c8fecd | 2023 | { |
7918f24d NC |
2024 | PERL_ARGS_ASSERT_DO_ODDBALL; |
2025 | ||
fb8f4cf8 | 2026 | if (*oddkey) { |
6d822dc4 | 2027 | if (ckWARN(WARN_MISC)) { |
a3b680e6 | 2028 | const char *err; |
fb8f4cf8 RZ |
2029 | if (oddkey == firstkey && |
2030 | SvROK(*oddkey) && | |
2031 | (SvTYPE(SvRV(*oddkey)) == SVt_PVAV || | |
2032 | SvTYPE(SvRV(*oddkey)) == SVt_PVHV)) | |
10c8fecd | 2033 | { |
a3b680e6 | 2034 | err = "Reference found where even-sized list expected"; |
10c8fecd GS |
2035 | } |
2036 | else | |
a3b680e6 | 2037 | err = "Odd number of elements in hash assignment"; |
f1f66076 | 2038 | Perl_warner(aTHX_ packWARN(WARN_MISC), "%s", err); |
10c8fecd | 2039 | } |
6d822dc4 | 2040 | |
10c8fecd GS |
2041 | } |
2042 | } | |
2043 | ||
a5f48505 DM |
2044 | |
2045 | /* Do a mark and sweep with the SVf_BREAK flag to detect elements which | |
2046 | * are common to both the LHS and RHS of an aassign, and replace them | |
2047 | * with copies. All these copies are made before the actual list assign is | |
2048 | * done. | |
2049 | * | |
2050 | * For example in ($a,$b) = ($b,$a), assigning the value of the first RHS | |
2051 | * element ($b) to the first LH element ($a), modifies $a; when the | |
2052 | * second assignment is done, the second RH element now has the wrong | |
2053 | * value. So we initially replace the RHS with ($b, mortalcopy($a)). | |
2054 | * Note that we don't need to make a mortal copy of $b. | |
2055 | * | |
2056 | * The algorithm below works by, for every RHS element, mark the | |
2057 | * corresponding LHS target element with SVf_BREAK. Then if the RHS | |
2058 | * element is found with SVf_BREAK set, it means it would have been | |
2059 | * modified, so make a copy. | |
2060 | * Note that by scanning both LHS and RHS in lockstep, we avoid | |
2061 | * unnecessary copies (like $b above) compared with a naive | |
2062 | * "mark all LHS; copy all marked RHS; unmark all LHS". | |
2063 | * | |
2064 | * If the LHS element is a 'my' declaration' and has a refcount of 1, then | |
2065 | * it can't be common and can be skipped. | |
ebc643ce DM |
2066 | * |
2067 | * On DEBUGGING builds it takes an extra boolean, fake. If true, it means | |
2068 | * that we thought we didn't need to call S_aassign_copy_common(), but we | |
2069 | * have anyway for sanity checking. If we find we need to copy, then panic. | |
a5f48505 DM |
2070 | */ |
2071 | ||
2072 | PERL_STATIC_INLINE void | |
2073 | S_aassign_copy_common(pTHX_ SV **firstlelem, SV **lastlelem, | |
ebc643ce DM |
2074 | SV **firstrelem, SV **lastrelem |
2075 | #ifdef DEBUGGING | |
2076 | , bool fake | |
2077 | #endif | |
2078 | ) | |
a5f48505 DM |
2079 | { |
2080 | dVAR; | |
2081 | SV **relem; | |
2082 | SV **lelem; | |
2083 | SSize_t lcount = lastlelem - firstlelem + 1; | |
2084 | bool marked = FALSE; /* have we marked any LHS with SVf_BREAK ? */ | |
2085 | bool const do_rc1 = cBOOL(PL_op->op_private & OPpASSIGN_COMMON_RC1); | |
beb08a1e | 2086 | bool copy_all = FALSE; |
a5f48505 DM |
2087 | |
2088 | assert(!PL_in_clean_all); /* SVf_BREAK not already in use */ | |
2089 | assert(firstlelem < lastlelem); /* at least 2 LH elements */ | |
2090 | assert(firstrelem < lastrelem); /* at least 2 RH elements */ | |
2091 | ||
ebc643ce DM |
2092 | |
2093 | lelem = firstlelem; | |
a5f48505 DM |
2094 | /* we never have to copy the first RH element; it can't be corrupted |
2095 | * by assigning something to the corresponding first LH element. | |
2096 | * So this scan does in a loop: mark LHS[N]; test RHS[N+1] | |
2097 | */ | |
ebc643ce | 2098 | relem = firstrelem + 1; |
a5f48505 DM |
2099 | |
2100 | for (; relem <= lastrelem; relem++) { | |
2101 | SV *svr; | |
2102 | ||
2103 | /* mark next LH element */ | |
2104 | ||
2105 | if (--lcount >= 0) { | |
2106 | SV *svl = *lelem++; | |
2107 | ||
2108 | if (UNLIKELY(!svl)) {/* skip AV alias marker */ | |
2109 | assert (lelem <= lastlelem); | |
2110 | svl = *lelem++; | |
2111 | lcount--; | |
2112 | } | |
2113 | ||
2114 | assert(svl); | |
beb08a1e TC |
2115 | if (SvSMAGICAL(svl)) { |
2116 | copy_all = TRUE; | |
2117 | } | |
a5f48505 DM |
2118 | if (SvTYPE(svl) == SVt_PVAV || SvTYPE(svl) == SVt_PVHV) { |
2119 | if (!marked) | |
2120 | return; | |
2121 | /* this LH element will consume all further args; | |
2122 | * no need to mark any further LH elements (if any). | |
2123 | * But we still need to scan any remaining RHS elements; | |
2124 | * set lcount negative to distinguish from lcount == 0, | |
2125 | * so the loop condition continues being true | |
2126 | */ | |
2127 | lcount = -1; | |
2128 | lelem--; /* no need to unmark this element */ | |
2129 | } | |
94a5f659 | 2130 | else if (!(do_rc1 && SvREFCNT(svl) == 1) && !SvIMMORTAL(svl)) { |
a5f48505 DM |
2131 | SvFLAGS(svl) |= SVf_BREAK; |
2132 | marked = TRUE; | |
2133 | } | |
2134 | else if (!marked) { | |
2135 | /* don't check RH element if no SVf_BREAK flags set yet */ | |
2136 | if (!lcount) | |
2137 | break; | |
2138 | continue; | |
2139 | } | |
2140 | } | |
2141 | ||
2142 | /* see if corresponding RH element needs copying */ | |
2143 | ||
2144 | assert(marked); | |
2145 | svr = *relem; | |
2146 | assert(svr); | |
2147 | ||
5c1db569 | 2148 | if (UNLIKELY(SvFLAGS(svr) & (SVf_BREAK|SVs_GMG) || copy_all)) { |
1050723f | 2149 | U32 brk = (SvFLAGS(svr) & SVf_BREAK); |
a5f48505 | 2150 | |
ebc643ce DM |
2151 | #ifdef DEBUGGING |
2152 | if (fake) { | |
9ae0115f | 2153 | /* op_dump(PL_op); */ |
ebc643ce DM |
2154 | Perl_croak(aTHX_ |
2155 | "panic: aassign skipped needed copy of common RH elem %" | |
2156 | UVuf, (UV)(relem - firstrelem)); | |
2157 | } | |
2158 | #endif | |
2159 | ||
a5f48505 DM |
2160 | TAINT_NOT; /* Each item is independent */ |
2161 | ||
2162 | /* Dear TODO test in t/op/sort.t, I love you. | |
2163 | (It's relying on a panic, not a "semi-panic" from newSVsv() | |
2164 | and then an assertion failure below.) */ | |
2165 | if (UNLIKELY(SvIS_FREED(svr))) { | |
2166 | Perl_croak(aTHX_ "panic: attempt to copy freed scalar %p", | |
2167 | (void*)svr); | |
2168 | } | |
2169 | /* avoid break flag while copying; otherwise COW etc | |
2170 | * disabled... */ | |
2171 | SvFLAGS(svr) &= ~SVf_BREAK; | |
2172 | /* Not newSVsv(), as it does not allow copy-on-write, | |
8c1e192f DM |
2173 | resulting in wasteful copies. |
2174 | Also, we use SV_NOSTEAL in case the SV is used more than | |
2175 | once, e.g. (...) = (f())[0,0] | |
2176 | Where the same SV appears twice on the RHS without a ref | |
2177 | count bump. (Although I suspect that the SV won't be | |
2178 | stealable here anyway - DAPM). | |
2179 | */ | |
a5f48505 DM |
2180 | *relem = sv_mortalcopy_flags(svr, |
2181 | SV_GMAGIC|SV_DO_COW_SVSETSV|SV_NOSTEAL); | |
2182 | /* ... but restore afterwards in case it's needed again, | |
2183 | * e.g. ($a,$b,$c) = (1,$a,$a) | |
2184 | */ | |
1050723f | 2185 | SvFLAGS(svr) |= brk; |
a5f48505 DM |
2186 | } |
2187 | ||
2188 | if (!lcount) | |
2189 | break; | |
2190 | } | |
2191 | ||
2192 | if (!marked) | |
2193 | return; | |
2194 | ||
2195 | /*unmark LHS */ | |
2196 | ||
2197 | while (lelem > firstlelem) { | |
2198 | SV * const svl = *(--lelem); | |
2199 | if (svl) | |
2200 | SvFLAGS(svl) &= ~SVf_BREAK; | |
2201 | } | |
2202 | } | |
2203 | ||
2204 | ||
2205 | ||
a0d0e21e LW |
2206 | PP(pp_aassign) |
2207 | { | |
27da23d5 | 2208 | dVAR; dSP; |
3280af22 NIS |
2209 | SV **lastlelem = PL_stack_sp; |
2210 | SV **lastrelem = PL_stack_base + POPMARK; | |
2211 | SV **firstrelem = PL_stack_base + POPMARK + 1; | |
a0d0e21e LW |
2212 | SV **firstlelem = lastrelem + 1; |
2213 | ||
eb578fdb KW |
2214 | SV **relem; |
2215 | SV **lelem; | |
1c23e2bd | 2216 | U8 gimme; |
a68090fe DM |
2217 | /* PL_delaymagic is restored by JUMPENV_POP on dieing, so we |
2218 | * only need to save locally, not on the save stack */ | |
2219 | U16 old_delaymagic = PL_delaymagic; | |
ebc643ce DM |
2220 | #ifdef DEBUGGING |
2221 | bool fake = 0; | |
2222 | #endif | |
5637b936 | 2223 | |
3280af22 | 2224 | PL_delaymagic = DM_DELAY; /* catch simultaneous items */ |
a0d0e21e LW |
2225 | |
2226 | /* If there's a common identifier on both sides we have to take | |
2227 | * special care that assigning the identifier on the left doesn't | |
2228 | * clobber a value on the right that's used later in the list. | |
2229 | */ | |
acdea6f0 | 2230 | |
beb08a1e TC |
2231 | /* at least 2 LH and RH elements, or commonality isn't an issue */ |
2232 | if (firstlelem < lastlelem && firstrelem < lastrelem) { | |
5c1db569 TC |
2233 | for (relem = firstrelem+1; relem <= lastrelem; relem++) { |
2234 | if (SvGMAGICAL(*relem)) | |
2235 | goto do_scan; | |
2236 | } | |
beb08a1e TC |
2237 | for (lelem = firstlelem; lelem <= lastlelem; lelem++) { |
2238 | if (*lelem && SvSMAGICAL(*lelem)) | |
2239 | goto do_scan; | |
a5f48505 | 2240 | } |
beb08a1e TC |
2241 | if ( PL_op->op_private & (OPpASSIGN_COMMON_SCALAR|OPpASSIGN_COMMON_RC1) ) { |
2242 | if (PL_op->op_private & OPpASSIGN_COMMON_RC1) { | |
2243 | /* skip the scan if all scalars have a ref count of 1 */ | |
2244 | for (lelem = firstlelem; lelem <= lastlelem; lelem++) { | |
8b0c3377 | 2245 | SV *sv = *lelem; |
beb08a1e TC |
2246 | if (!sv || SvREFCNT(sv) == 1) |
2247 | continue; | |
2248 | if (SvTYPE(sv) != SVt_PVAV && SvTYPE(sv) != SVt_PVAV) | |
2249 | goto do_scan; | |
2250 | break; | |
2251 | } | |
2252 | } | |
2253 | else { | |
2254 | do_scan: | |
2255 | S_aassign_copy_common(aTHX_ | |
2256 | firstlelem, lastlelem, firstrelem, lastrelem | |
ebc643ce | 2257 | #ifdef DEBUGGING |
beb08a1e | 2258 | , fake |
ebc643ce | 2259 | #endif |
beb08a1e TC |
2260 | ); |
2261 | } | |
a5f48505 | 2262 | } |
a0d0e21e | 2263 | } |
ebc643ce DM |
2264 | #ifdef DEBUGGING |
2265 | else { | |
2266 | /* on debugging builds, do the scan even if we've concluded we | |
2267 | * don't need to, then panic if we find commonality. Note that the | |
2268 | * scanner assumes at least 2 elements */ | |
2269 | if (firstlelem < lastlelem && firstrelem < lastrelem) { | |
2270 | fake = 1; | |
2271 | goto do_scan; | |
2272 | } | |
2273 | } | |
2274 | #endif | |
a0d0e21e | 2275 | |
a5f48505 | 2276 | gimme = GIMME_V; |
a0d0e21e LW |
2277 | relem = firstrelem; |
2278 | lelem = firstlelem; | |
10c8fecd | 2279 | |
8b0c3377 DM |
2280 | if (relem > lastrelem) |
2281 | goto no_relems; | |
2282 | ||
2283 | /* first lelem loop while there are still relems */ | |
5d9574c1 | 2284 | while (LIKELY(lelem <= lastlelem)) { |
bdaf10a5 | 2285 | bool alias = FALSE; |
8b0c3377 DM |
2286 | SV *lsv = *lelem++; |
2287 | ||
c73f612f DM |
2288 | TAINT_NOT; /* Each item stands on its own, taintwise. */ |
2289 | ||
8b0c3377 DM |
2290 | assert(relem <= lastrelem); |
2291 | if (UNLIKELY(!lsv)) { | |
bdaf10a5 | 2292 | alias = TRUE; |
8b0c3377 DM |
2293 | lsv = *lelem++; |
2294 | ASSUME(SvTYPE(lsv) == SVt_PVAV); | |
bdaf10a5 | 2295 | } |
a5f48505 | 2296 | |
8b0c3377 DM |
2297 | switch (SvTYPE(lsv)) { |
2298 | case SVt_PVAV: { | |
2299 | SV **svp; | |
2300 | SSize_t i; | |
2301 | SSize_t tmps_base; | |
2302 | SSize_t nelems = lastrelem - relem + 1; | |
b09ed995 | 2303 | AV *ary = MUTABLE_AV(lsv); |
8b0c3377 DM |
2304 | |
2305 | /* Assigning to an aggregate is tricky. First there is the | |
2306 | * issue of commonality, e.g. @a = ($a[0]). Since the | |
2307 | * stack isn't refcounted, clearing @a prior to storing | |
2308 | * elements will free $a[0]. Similarly with | |
2309 | * sub FETCH { $status[$_[1]] } @status = @tied[0,1]; | |
2310 | * | |
2311 | * The way to avoid these issues is to make the copy of each | |
2312 | * SV (and we normally store a *copy* in the array) *before* | |
2313 | * clearing the array. But this has a problem in that | |
2314 | * if the code croaks during copying, the not-yet-stored copies | |
2315 | * could leak. One way to avoid this is to make all the copies | |
2316 | * mortal, but that's quite expensive. | |
2317 | * | |
2318 | * The current solution to these issues is to use a chunk | |
2319 | * of the tmps stack as a temporary refcounted-stack. SVs | |
2320 | * will be put on there during processing to avoid leaks, | |
2321 | * but will be removed again before the end of this block, | |
2322 | * so free_tmps() is never normally called. Also, the | |
2323 | * sv_refcnt of the SVs doesn't have to be manipulated, since | |
2324 | * the ownership of 1 reference count is transferred directly | |
2325 | * from the tmps stack to the AV when the SV is stored. | |
2326 | * | |
2327 | * We disarm slots in the temps stack by storing PL_sv_undef | |
2328 | * there: it doesn't matter if that SV's refcount is | |
2329 | * repeatedly decremented during a croak. But usually this is | |
2330 | * only an interim measure. By the end of this code block | |
2331 | * we try where possible to not leave any PL_sv_undef's on the | |
2332 | * tmps stack e.g. by shuffling newer entries down. | |
2333 | * | |
2334 | * There is one case where we don't copy: non-magical | |
2335 | * SvTEMP(sv)'s with a ref count of 1. The only owner of these | |
2336 | * is on the tmps stack, so its safe to directly steal the SV | |
2337 | * rather than copying. This is common in things like function | |
2338 | * returns, map etc, which all return a list of such SVs. | |
2339 | * | |
2340 | * Note however something like @a = (f())[0,0], where there is | |
2341 | * a danger of the same SV being shared: this avoided because | |
2342 | * when the SV is stored as $a[0], its ref count gets bumped, | |
2343 | * so the RC==1 test fails and the second element is copied | |
2344 | * instead. | |
2345 | * | |
2346 | * We also use one slot in the tmps stack to hold an extra | |
2347 | * ref to the array, to ensure it doesn't get prematurely | |
2348 | * freed. Again, this is removed before the end of this block. | |
2349 | * | |
2350 | * Note that OPpASSIGN_COMMON_AGG is used to flag a possible | |
2351 | * @a = ($a[0]) case, but the current implementation uses the | |
2352 | * same algorithm regardless, so ignores that flag. (It *is* | |
2353 | * used in the hash branch below, however). | |
2354 | */ | |
2355 | ||
2356 | /* Reserve slots for ary, plus the elems we're about to copy, | |
2357 | * then protect ary and temporarily void the remaining slots | |
2358 | * with &PL_sv_undef */ | |
2359 | EXTEND_MORTAL(nelems + 1); | |
2360 | PL_tmps_stack[++PL_tmps_ix] = SvREFCNT_inc_simple_NN(ary); | |
2361 | tmps_base = PL_tmps_ix + 1; | |
2362 | for (i = 0; i < nelems; i++) | |
2363 | PL_tmps_stack[tmps_base + i] = &PL_sv_undef; | |
2364 | PL_tmps_ix += nelems; | |
2365 | ||
2366 | /* Make a copy of each RHS elem and save on the tmps_stack | |
2367 | * (or pass through where we can optimise away the copy) */ | |
2368 | ||
2369 | if (UNLIKELY(alias)) { | |
2370 | U32 lval = (gimme == G_ARRAY) | |
2371 | ? (PL_op->op_flags & OPf_MOD || LVRET) : 0; | |
a5f48505 | 2372 | for (svp = relem; svp <= lastrelem; svp++) { |
8b0c3377 DM |
2373 | SV *rsv = *svp; |
2374 | ||
2375 | SvGETMAGIC(rsv); | |
2376 | if (!SvROK(rsv)) | |
2377 | DIE(aTHX_ "Assigned value is not a reference"); | |
2378 | if (SvTYPE(SvRV(rsv)) > SVt_PVLV) | |
2379 | /* diag_listed_as: Assigned value is not %s reference */ | |
2380 | DIE(aTHX_ | |
2381 | "Assigned value is not a SCALAR reference"); | |
2382 | if (lval) | |
2383 | *svp = rsv = sv_mortalcopy(rsv); | |
2384 | /* XXX else check for weak refs? */ | |
2385 | rsv = SvREFCNT_inc_NN(SvRV(rsv)); | |
2386 | assert(tmps_base <= PL_tmps_max); | |
2387 | PL_tmps_stack[tmps_base++] = rsv; | |
a5f48505 | 2388 | } |
a5f48505 | 2389 | } |
8b0c3377 DM |
2390 | else { |
2391 | for (svp = relem; svp <= lastrelem; svp++) { | |
2392 | SV *rsv = *svp; | |
a5f48505 | 2393 | |
8b0c3377 DM |
2394 | if (SvTEMP(rsv) && !SvGMAGICAL(rsv) && SvREFCNT(rsv) == 1) { |
2395 | /* can skip the copy */ | |
2396 | SvREFCNT_inc_simple_void_NN(rsv); | |
2397 | SvTEMP_off(rsv); | |
2398 | } | |
a5f48505 | 2399 | else { |
8b0c3377 DM |
2400 | SV *nsv; |
2401 | /* do get before newSV, in case it dies and leaks */ | |
2402 | SvGETMAGIC(rsv); | |
2403 | nsv = newSV(0); | |
8c1e192f DM |
2404 | /* see comment in S_aassign_copy_common about |
2405 | * SV_NOSTEAL */ | |
8b0c3377 DM |
2406 | sv_setsv_flags(nsv, rsv, |
2407 | (SV_DO_COW_SVSETSV|SV_NOSTEAL)); | |
2408 | rsv = *svp = nsv; | |
a5f48505 | 2409 | } |
8b0c3377 DM |
2410 | |
2411 | assert(tmps_base <= PL_tmps_max); | |
2412 | PL_tmps_stack[tmps_base++] = rsv; | |
2413 | } | |
2414 | } | |
2415 | ||
2416 | if (SvRMAGICAL(ary) || AvFILLp(ary) >= 0) /* may be non-empty */ | |
2417 | av_clear(ary); | |
2418 | ||
2419 | /* store in the array, the SVs that are in the tmps stack */ | |
2420 | ||
2421 | tmps_base -= nelems; | |
2422 | ||
80c1439f | 2423 | if (SvMAGICAL(ary) || SvREADONLY(ary) || !AvREAL(ary)) { |
8b0c3377 DM |
2424 | /* for arrays we can't cheat with, use the official API */ |
2425 | av_extend(ary, nelems - 1); | |
2426 | for (i = 0; i < nelems; i++) { | |
2427 | SV **svp = &(PL_tmps_stack[tmps_base + i]); | |
2428 | SV *rsv = *svp; | |
2429 | /* A tied store won't take ownership of rsv, so keep | |
2430 | * the 1 refcnt on the tmps stack; otherwise disarm | |
2431 | * the tmps stack entry */ | |
2432 | if (av_store(ary, i, rsv)) | |
2433 | *svp = &PL_sv_undef; | |
2434 | /* av_store() may have added set magic to rsv */; | |
2435 | SvSETMAGIC(rsv); | |
2436 | } | |
2437 | /* disarm ary refcount: see comments below about leak */ | |
2438 | PL_tmps_stack[tmps_base - 1] = &PL_sv_undef; | |
2439 | } | |
2440 | else { | |
2441 | /* directly access/set the guts of the AV */ | |
2442 | SSize_t fill = nelems - 1; | |
2443 | if (fill > AvMAX(ary)) | |
2444 | av_extend_guts(ary, fill, &AvMAX(ary), &AvALLOC(ary), | |
2445 | &AvARRAY(ary)); | |
2446 | AvFILLp(ary) = fill; | |
2447 | Copy(&(PL_tmps_stack[tmps_base]), AvARRAY(ary), nelems, SV*); | |
2448 | /* Quietly remove all the SVs from the tmps stack slots, | |
2449 | * since ary has now taken ownership of the refcnt. | |
2450 | * Also remove ary: which will now leak if we die before | |
2451 | * the SvREFCNT_dec_NN(ary) below */ | |
2452 | if (UNLIKELY(PL_tmps_ix >= tmps_base + nelems)) | |
2453 | Move(&PL_tmps_stack[tmps_base + nelems], | |
2454 | &PL_tmps_stack[tmps_base - 1], | |
2455 | PL_tmps_ix - (tmps_base + nelems) + 1, | |
2456 | SV*); | |
2457 | PL_tmps_ix -= (nelems + 1); | |
2458 | } | |
2459 | ||
5d9574c1 | 2460 | if (UNLIKELY(PL_delaymagic & DM_ARRAY_ISA)) |
8b0c3377 | 2461 | /* its assumed @ISA set magic can't die and leak ary */ |
ad64d0ec | 2462 | SvSETMAGIC(MUTABLE_SV(ary)); |
8b0c3377 DM |
2463 | SvREFCNT_dec_NN(ary); |
2464 | ||
2465 | relem = lastrelem + 1; | |
2466 | goto no_relems; | |
a5f48505 DM |
2467 | } |
2468 | ||
10c8fecd | 2469 | case SVt_PVHV: { /* normal hash */ |
8b0c3377 DM |
2470 | |
2471 | SV **svp; | |
2472 | bool dirty_tmps; | |
2473 | SSize_t i; | |
2474 | SSize_t tmps_base; | |
2475 | SSize_t nelems = lastrelem - relem + 1; | |
b09ed995 | 2476 | HV *hash = MUTABLE_HV(lsv); |
8b0c3377 DM |
2477 | |
2478 | if (UNLIKELY(nelems & 1)) { | |
2479 | do_oddball(lastrelem, relem); | |
2480 | /* we have firstlelem to reuse, it's not needed any more */ | |
2481 | *++lastrelem = &PL_sv_undef; | |
2482 | nelems++; | |
2483 | } | |
2484 | ||
2485 | /* See the SVt_PVAV branch above for a long description of | |
2486 | * how the following all works. The main difference for hashes | |
2487 | * is that we treat keys and values separately (and have | |
2488 | * separate loops for them): as for arrays, values are always | |
2489 | * copied (except for the SvTEMP optimisation), since they | |
2490 | * need to be stored in the hash; while keys are only | |
2491 | * processed where they might get prematurely freed or | |
2492 | * whatever. */ | |
2493 | ||
2494 | /* tmps stack slots: | |
2495 | * * reserve a slot for the hash keepalive; | |
2496 | * * reserve slots for the hash values we're about to copy; | |
2497 | * * preallocate for the keys we'll possibly copy or refcount bump | |
2498 | * later; | |
2499 | * then protect hash and temporarily void the remaining | |
2500 | * value slots with &PL_sv_undef */ | |
2501 | EXTEND_MORTAL(nelems + 1); | |
2502 | ||
2503 | /* convert to number of key/value pairs */ | |
2504 | nelems >>= 1; | |
2505 | ||
2506 | PL_tmps_stack[++PL_tmps_ix] = SvREFCNT_inc_simple_NN(hash); | |
2507 | tmps_base = PL_tmps_ix + 1; | |
2508 | for (i = 0; i < nelems; i++) | |
2509 | PL_tmps_stack[tmps_base + i] = &PL_sv_undef; | |
2510 | PL_tmps_ix += nelems; | |
2511 | ||
2512 | /* Make a copy of each RHS hash value and save on the tmps_stack | |
2513 | * (or pass through where we can optimise away the copy) */ | |
2514 | ||
2515 | for (svp = relem + 1; svp <= lastrelem; svp += 2) { | |
2516 | SV *rsv = *svp; | |
2517 | ||
2518 | if (SvTEMP(rsv) && !SvGMAGICAL(rsv) && SvREFCNT(rsv) == 1) { | |
2519 | /* can skip the copy */ | |
2520 | SvREFCNT_inc_simple_void_NN(rsv); | |
2521 | SvTEMP_off(rsv); | |
2522 | } | |
2523 | else { | |
2524 | SV *nsv; | |
2525 | /* do get before newSV, in case it dies and leaks */ | |
2526 | SvGETMAGIC(rsv); | |
2527 | nsv = newSV(0); | |
2528 | /* see comment in S_aassign_copy_common about | |
2529 | * SV_NOSTEAL */ | |
2530 | sv_setsv_flags(nsv, rsv, | |
2531 | (SV_DO_COW_SVSETSV|SV_NOSTEAL)); | |
2532 | rsv = *svp = nsv; | |
1c4ea384 RZ |
2533 | } |
2534 | ||
8b0c3377 DM |
2535 | assert(tmps_base <= PL_tmps_max); |
2536 | PL_tmps_stack[tmps_base++] = rsv; | |
2537 | } | |
2538 | tmps_base -= nelems; | |
a5f48505 | 2539 | |
a5f48505 | 2540 | |
8b0c3377 DM |
2541 | /* possibly protect keys */ |
2542 | ||
2543 | if (UNLIKELY(gimme == G_ARRAY)) { | |
2544 | /* handle e.g. | |
2545 | * @a = ((%h = ($$r, 1)), $r = "x"); | |
2546 | * $_++ for %h = (1,2,3,4); | |
2547 | */ | |
2548 | EXTEND_MORTAL(nelems); | |
2549 | for (svp = relem; svp <= lastrelem; svp += 2) | |
2550 | *svp = sv_mortalcopy_flags(*svp, | |
2551 | SV_GMAGIC|SV_DO_COW_SVSETSV|SV_NOSTEAL); | |
2552 | } | |
2553 | else if (PL_op->op_private & OPpASSIGN_COMMON_AGG) { | |
2554 | /* for possible commonality, e.g. | |
2555 | * %h = ($h{a},1) | |
2556 | * avoid premature freeing RHS keys by mortalising | |
2557 | * them. | |
2558 | * For a magic element, make a copy so that its magic is | |
2559 | * called *before* the hash is emptied (which may affect | |
2560 | * a tied value for example). | |
2561 | * In theory we should check for magic keys in all | |
2562 | * cases, not just under OPpASSIGN_COMMON_AGG, but in | |
2563 | * practice, !OPpASSIGN_COMMON_AGG implies only | |
2564 | * constants or padtmps on the RHS. | |
2565 | */ | |
2566 | EXTEND_MORTAL(nelems); | |
2567 | for (svp = relem; svp <= lastrelem; svp += 2) { | |
2568 | SV *rsv = *svp; | |
2569 | if (UNLIKELY(SvGMAGICAL(rsv))) { | |
2570 | SSize_t n; | |
a5f48505 DM |
2571 | *svp = sv_mortalcopy_flags(*svp, |
2572 | SV_GMAGIC|SV_DO_COW_SVSETSV|SV_NOSTEAL); | |
8b0c3377 DM |
2573 | /* allow other branch to continue pushing |
2574 | * onto tmps stack without checking each time */ | |
2575 | n = (lastrelem - relem) >> 1; | |
2576 | EXTEND_MORTAL(n); | |
a5f48505 | 2577 | } |
8b0c3377 DM |
2578 | else |
2579 | PL_tmps_stack[++PL_tmps_ix] = | |
2580 | SvREFCNT_inc_simple_NN(rsv); | |
a5f48505 | 2581 | } |
8b0c3377 | 2582 | } |
a5f48505 | 2583 | |
8b0c3377 DM |
2584 | if (SvRMAGICAL(hash) || HvUSEDKEYS(hash)) |
2585 | hv_clear(hash); | |
a5f48505 | 2586 | |
8b0c3377 DM |
2587 | /* now assign the keys and values to the hash */ |
2588 | ||
2589 | dirty_tmps = FALSE; | |
2590 | ||
2591 | if (UNLIKELY(gimme == G_ARRAY)) { | |
2592 | /* @a = (%h = (...)) etc */ | |
2593 | SV **svp; | |
2594 | SV **topelem = relem; | |
2595 | ||
2596 | for (i = 0, svp = relem; svp <= lastrelem; i++, svp++) { | |
2597 | SV *key = *svp++; | |
2598 | SV *val = *svp; | |
2599 | /* remove duplicates from list we return */ | |
2600 | if (!hv_exists_ent(hash, key, 0)) { | |
2601 | /* copy key back: possibly to an earlier | |
2602 | * stack location if we encountered dups earlier, | |
2603 | * The values will be updated later | |
2604 | */ | |
2605 | *topelem = key; | |
2606 | topelem += 2; | |
632b9d6f | 2607 | } |
8b0c3377 DM |
2608 | /* A tied store won't take ownership of val, so keep |
2609 | * the 1 refcnt on the tmps stack; otherwise disarm | |
2610 | * the tmps stack entry */ | |
2611 | if (hv_store_ent(hash, key, val, 0)) | |
2612 | PL_tmps_stack[tmps_base + i] = &PL_sv_undef; | |
2613 | else | |
2614 | dirty_tmps = TRUE; | |
2615 | /* hv_store_ent() may have added set magic to val */; | |
2616 | SvSETMAGIC(val); | |
2617 | } | |
2618 | if (topelem < svp) { | |
1c4ea384 RZ |
2619 | /* at this point we have removed the duplicate key/value |
2620 | * pairs from the stack, but the remaining values may be | |
2621 | * wrong; i.e. with (a 1 a 2 b 3) on the stack we've removed | |
2622 | * the (a 2), but the stack now probably contains | |
2623 | * (a <freed> b 3), because { hv_save(a,1); hv_save(a,2) } | |
2624 | * obliterates the earlier key. So refresh all values. */ | |
8b0c3377 DM |
2625 | lastrelem = topelem - 1; |
2626 | while (relem < lastrelem) { | |
1c4ea384 RZ |
2627 | HE *he; |
2628 | he = hv_fetch_ent(hash, *relem++, 0, 0); | |
2629 | *relem++ = (he ? HeVAL(he) : &PL_sv_undef); | |
2630 | } | |
2631 | } | |
8b0c3377 DM |
2632 | } |
2633 | else { | |
2634 | SV **svp; | |
2635 | for (i = 0, svp = relem; svp <= lastrelem; i++, svp++) { | |
2636 | SV *key = *svp++; | |
2637 | SV *val = *svp; | |
2638 | if (hv_store_ent(hash, key, val, 0)) | |
2639 | PL_tmps_stack[tmps_base + i] = &PL_sv_undef; | |
2640 | else | |
2641 | dirty_tmps = TRUE; | |
2642 | /* hv_store_ent() may have added set magic to val */; | |
2643 | SvSETMAGIC(val); | |
2644 | } | |
2645 | } | |
2646 | ||
2647 | if (dirty_tmps) { | |
2648 | /* there are still some 'live' recounts on the tmps stack | |
2649 | * - usually caused by storing into a tied hash. So let | |
2650 | * free_tmps() do the proper but slow job later. | |
2651 | * Just disarm hash refcount: see comments below about leak | |
2652 | */ | |
2653 | PL_tmps_stack[tmps_base - 1] = &PL_sv_undef; | |
2654 | } | |
2655 | else { | |
2656 | /* Quietly remove all the SVs from the tmps stack slots, | |
2657 | * since hash has now taken ownership of the refcnt. | |
2658 | * Also remove hash: which will now leak if we die before | |
2659 | * the SvREFCNT_dec_NN(hash) below */ | |
2660 | if (UNLIKELY(PL_tmps_ix >= tmps_base + nelems)) | |
2661 | Move(&PL_tmps_stack[tmps_base + nelems], | |
2662 | &PL_tmps_stack[tmps_base - 1], | |
2663 | PL_tmps_ix - (tmps_base + nelems) + 1, | |
2664 | SV*); | |
2665 | PL_tmps_ix -= (nelems + 1); | |
2666 | } | |
2667 | ||
2668 | SvREFCNT_dec_NN(hash); | |
2669 | ||
2670 | relem = lastrelem + 1; | |
2671 | goto no_relems; | |
2672 | } | |
2673 | ||
a0d0e21e | 2674 | default: |
8b0c3377 | 2675 | if (!SvIMMORTAL(lsv)) { |
d24e3eb1 DM |
2676 | SV *ref; |
2677 | ||
8b0c3377 DM |
2678 | if (UNLIKELY( |
2679 | SvTEMP(lsv) && !SvSMAGICAL(lsv) && SvREFCNT(lsv) == 1 && | |
2680 | (!isGV_with_GP(lsv) || SvFAKE(lsv)) && ckWARN(WARN_MISC) | |
2681 | )) | |
2682 | Perl_warner(aTHX_ | |
2683 | packWARN(WARN_MISC), | |
2684 | "Useless assignment to a temporary" | |
2685 | ); | |
d24e3eb1 DM |
2686 | |
2687 | /* avoid freeing $$lsv if it might be needed for further | |
2688 | * elements, e.g. ($ref, $foo) = (1, $$ref) */ | |
2689 | if ( SvROK(lsv) | |
2690 | && ( ((ref = SvRV(lsv)), SvREFCNT(ref)) == 1) | |
2691 | && lelem <= lastlelem | |
2692 | ) { | |
2693 | SSize_t ix; | |
2694 | SvREFCNT_inc_simple_void_NN(ref); | |
2695 | /* an unrolled sv_2mortal */ | |
2696 | ix = ++PL_tmps_ix; | |
2697 | if (UNLIKELY(ix >= PL_tmps_max)) | |
2698 | /* speculatively grow enough to cover other | |
2699 | * possible refs */ | |
67c3640a | 2700 | (void)tmps_grow_p(ix + (lastlelem - lelem)); |
d24e3eb1 DM |
2701 | PL_tmps_stack[ix] = ref; |
2702 | } | |
2703 | ||
8b0c3377 DM |
2704 | sv_setsv(lsv, *relem); |
2705 | *relem = lsv; | |
2706 | SvSETMAGIC(lsv); | |
2707 | } | |
2708 | if (++relem > lastrelem) | |
2709 | goto no_relems; | |
a0d0e21e | 2710 | break; |
8b0c3377 DM |
2711 | } /* switch */ |
2712 | } /* while */ | |
2713 | ||
2714 | ||
2715 | no_relems: | |
2716 | ||
2717 | /* simplified lelem loop for when there are no relems left */ | |
2718 | while (LIKELY(lelem <= lastlelem)) { | |
2719 | SV *lsv = *lelem++; | |
c73f612f DM |
2720 | |
2721 | TAINT_NOT; /* Each item stands on its own, taintwise. */ | |
2722 | ||
8b0c3377 DM |
2723 | if (UNLIKELY(!lsv)) { |
2724 | lsv = *lelem++; | |
2725 | ASSUME(SvTYPE(lsv) == SVt_PVAV); | |
a0d0e21e | 2726 | } |
8b0c3377 DM |
2727 | |
2728 | switch (SvTYPE(lsv)) { | |
2729 | case SVt_PVAV: | |
b09ed995 DM |
2730 | if (SvRMAGICAL(lsv) || AvFILLp((SV*)lsv) >= 0) { |
2731 | av_clear((AV*)lsv); | |
8b0c3377 | 2732 | if (UNLIKELY(PL_delaymagic & DM_ARRAY_ISA)) |
b09ed995 | 2733 | SvSETMAGIC(lsv); |
8b0c3377 DM |
2734 | } |
2735 | break; | |
2736 | ||
2737 | case SVt_PVHV: | |
b09ed995 DM |
2738 | if (SvRMAGICAL(lsv) || HvUSEDKEYS((HV*)lsv)) |
2739 | hv_clear((HV*)lsv); | |
8b0c3377 DM |
2740 | break; |
2741 | ||
2742 | default: | |
2743 | if (!SvIMMORTAL(lsv)) { | |
e03e82a0 | 2744 | sv_set_undef(lsv); |
8b0c3377 | 2745 | SvSETMAGIC(lsv); |
b09ed995 | 2746 | *relem++ = lsv; |
8b0c3377 DM |
2747 | } |
2748 | break; | |
2749 | } /* switch */ | |
2750 | } /* while */ | |
2751 | ||
c73f612f DM |
2752 | TAINT_NOT; /* result of list assign isn't tainted */ |
2753 | ||
5d9574c1 | 2754 | if (UNLIKELY(PL_delaymagic & ~DM_DELAY)) { |
985213f2 | 2755 | /* Will be used to set PL_tainting below */ |
dfff4baf BF |
2756 | Uid_t tmp_uid = PerlProc_getuid(); |
2757 | Uid_t tmp_euid = PerlProc_geteuid(); | |
2758 | Gid_t tmp_gid = PerlProc_getgid(); | |
2759 | Gid_t tmp_egid = PerlProc_getegid(); | |
985213f2 | 2760 | |
b469f1e0 | 2761 | /* XXX $> et al currently silently ignore failures */ |
3280af22 | 2762 | if (PL_delaymagic & DM_UID) { |
a0d0e21e | 2763 | #ifdef HAS_SETRESUID |
b469f1e0 JH |
2764 | PERL_UNUSED_RESULT( |
2765 | setresuid((PL_delaymagic & DM_RUID) ? PL_delaymagic_uid : (Uid_t)-1, | |
2766 | (PL_delaymagic & DM_EUID) ? PL_delaymagic_euid : (Uid_t)-1, | |
2767 | (Uid_t)-1)); | |
d1a21e44 | 2768 | #elif defined(HAS_SETREUID) |
b469f1e0 JH |
2769 | PERL_UNUSED_RESULT( |
2770 | setreuid((PL_delaymagic & DM_RUID) ? PL_delaymagic_uid : (Uid_t)-1, | |
2771 | (PL_delaymagic & DM_EUID) ? PL_delaymagic_euid : (Uid_t)-1)); | |
d1a21e44 | 2772 | #else |
56febc5e | 2773 | # ifdef HAS_SETRUID |
b28d0864 | 2774 | if ((PL_delaymagic & DM_UID) == DM_RUID) { |
b469f1e0 | 2775 | PERL_UNUSED_RESULT(setruid(PL_delaymagic_uid)); |
b28d0864 | 2776 | PL_delaymagic &= ~DM_RUID; |
a0d0e21e | 2777 | } |
56febc5e AD |
2778 | # endif /* HAS_SETRUID */ |
2779 | # ifdef HAS_SETEUID | |
b28d0864 | 2780 | if ((PL_delaymagic & DM_UID) == DM_EUID) { |
b469f1e0 | 2781 | PERL_UNUSED_RESULT(seteuid(PL_delaymagic_euid)); |
b28d0864 | 2782 | PL_delaymagic &= ~DM_EUID; |
a0d0e21e | 2783 | } |
56febc5e | 2784 | # endif /* HAS_SETEUID */ |
b28d0864 | 2785 | if (PL_delaymagic & DM_UID) { |
985213f2 | 2786 | if (PL_delaymagic_uid != PL_delaymagic_euid) |
cea2e8a9 | 2787 | DIE(aTHX_ "No setreuid available"); |
b469f1e0 | 2788 | PERL_UNUSED_RESULT(PerlProc_setuid(PL_delaymagic_uid)); |
a0d0e21e | 2789 | } |
56febc5e | 2790 | #endif /* HAS_SETRESUID */ |
04783dc7 | 2791 | |
985213f2 AB |
2792 | tmp_uid = PerlProc_getuid(); |
2793 | tmp_euid = PerlProc_geteuid(); | |
a0d0e21e | 2794 | } |
b469f1e0 | 2795 | /* XXX $> et al currently silently ignore failures */ |
3280af22 | 2796 | if (PL_delaymagic & DM_GID) { |
a0d0e21e | 2797 | #ifdef HAS_SETRESGID |
b469f1e0 JH |
2798 | PERL_UNUSED_RESULT( |
2799 | setresgid((PL_delaymagic & DM_RGID) ? PL_delaymagic_gid : (Gid_t)-1, | |
2800 | (PL_delaymagic & DM_EGID) ? PL_delaymagic_egid : (Gid_t)-1, | |
2801 | (Gid_t)-1)); | |
d1a21e44 | 2802 | #elif defined(HAS_SETREGID) |
b469f1e0 JH |
2803 | PERL_UNUSED_RESULT( |
2804 | setregid((PL_delaymagic & DM_RGID) ? PL_delaymagic_gid : (Gid_t)-1, | |
2805 | (PL_delaymagic & DM_EGID) ? PL_delaymagic_egid : (Gid_t)-1)); | |
d1a21e44 | 2806 | #else |
56febc5e | 2807 | # ifdef HAS_SETRGID |
b28d0864 | 2808 | if ((PL_delaymagic & DM_GID) == DM_RGID) { |
b469f1e0 | 2809 | PERL_UNUSED_RESULT(setrgid(PL_delaymagic_gid)); |
b28d0864 | 2810 | PL_delaymagic &= ~DM_RGID; |
a0d0e21e | 2811 | } |
56febc5e AD |
2812 | # endif /* HAS_SETRGID */ |
2813 | # ifdef HAS_SETEGID | |
b28d0864 | 2814 | if ((PL_delaymagic & DM_GID) == DM_EGID) { |
b469f1e0 | 2815 | PERL_UNUSED_RESULT(setegid(PL_delaymagic_egid)); |
b28d0864 | 2816 | PL_delaymagic &= ~DM_EGID; |
a0d0e21e | 2817 | } |
56febc5e | 2818 | # endif /* HAS_SETEGID */ |
b28d0864 | 2819 | if (PL_delaymagic & DM_GID) { |
985213f2 | 2820 | if (PL_delaymagic_gid != PL_delaymagic_egid) |
cea2e8a9 | 2821 | DIE(aTHX_ "No setregid available"); |
b469f1e0 | 2822 | PERL_UNUSED_RESULT(PerlProc_setgid(PL_delaymagic_gid)); |
a0d0e21e | 2823 | } |
56febc5e | 2824 | #endif /* HAS_SETRESGID */ |
04783dc7 | 2825 | |
985213f2 AB |
2826 | tmp_gid = PerlProc_getgid(); |
2827 | tmp_egid = PerlProc_getegid(); | |
a0d0e21e | 2828 | } |
284167a5 | 2829 | TAINTING_set( TAINTING_get | (tmp_uid && (tmp_euid != tmp_uid || tmp_egid != tmp_gid)) ); |
9a9b5ec9 DM |
2830 | #ifdef NO_TAINT_SUPPORT |
2831 | PERL_UNUSED_VAR(tmp_uid); | |
2832 | PERL_UNUSED_VAR(tmp_euid); | |
2833 | PERL_UNUSED_VAR(tmp_gid); | |
2834 | PERL_UNUSED_VAR(tmp_egid); | |
2835 | #endif | |
a0d0e21e | 2836 | } |
a68090fe | 2837 | PL_delaymagic = old_delaymagic; |
54310121 | 2838 | |
54310121 | 2839 | if (gimme == G_VOID) |
2840 | SP = firstrelem - 1; | |
2841 | else if (gimme == G_SCALAR) { | |
54310121 | 2842 | SP = firstrelem; |
b09ed995 | 2843 | EXTEND(SP,1); |
7b394f12 DM |
2844 | if (PL_op->op_private & OPpASSIGN_TRUEBOOL) |
2845 | SETs((firstlelem - firstrelem) ? &PL_sv_yes : &PL_sv_zero); | |
2846 | else { | |
2847 | dTARGET; | |
2848 | SETi(firstlelem - firstrelem); | |
2849 | } | |
54310121 | 2850 | } |
b09ed995 DM |
2851 | else |
2852 | SP = relem - 1; | |
08aeb9f7 | 2853 | |
54310121 | 2854 | RETURN; |
a0d0e21e LW |
2855 | } |
2856 | ||
8782bef2 GB |
2857 | PP(pp_qr) |
2858 | { | |
20b7effb | 2859 | dSP; |
eb578fdb | 2860 | PMOP * const pm = cPMOP; |
fe578d7f | 2861 | REGEXP * rx = PM_GETRE(pm); |
196a02af DM |
2862 | regexp *prog = ReANY(rx); |
2863 | SV * const pkg = RXp_ENGINE(prog)->qr_package(aTHX_ (rx)); | |
c4420975 | 2864 | SV * const rv = sv_newmortal(); |
d63c20f2 DM |
2865 | CV **cvp; |
2866 | CV *cv; | |
288b8c02 NC |
2867 | |
2868 | SvUPGRADE(rv, SVt_IV); | |
c2123ae3 NC |
2869 | /* For a subroutine describing itself as "This is a hacky workaround" I'm |
2870 | loathe to use it here, but it seems to be the right fix. Or close. | |
2871 | The key part appears to be that it's essential for pp_qr to return a new | |
2872 | object (SV), which implies that there needs to be an effective way to | |
2873 | generate a new SV from the existing SV that is pre-compiled in the | |
2874 | optree. */ | |
2875 | SvRV_set(rv, MUTABLE_SV(reg_temp_copy(NULL, rx))); | |
288b8c02 NC |
2876 | SvROK_on(rv); |
2877 | ||
8d919b0a | 2878 | cvp = &( ReANY((REGEXP *)SvRV(rv))->qr_anoncv); |
5d9574c1 | 2879 | if (UNLIKELY((cv = *cvp) && CvCLONE(*cvp))) { |
d63c20f2 | 2880 | *cvp = cv_clone(cv); |
fc2b2dca | 2881 | SvREFCNT_dec_NN(cv); |
d63c20f2 DM |
2882 | } |
2883 | ||
288b8c02 | 2884 | if (pkg) { |
f815daf2 | 2885 | HV *const stash = gv_stashsv(pkg, GV_ADD); |
fc2b2dca | 2886 | SvREFCNT_dec_NN(pkg); |
288b8c02 NC |
2887 | (void)sv_bless(rv, stash); |
2888 | } | |
2889 | ||
196a02af | 2890 | if (UNLIKELY(RXp_ISTAINTED(prog))) { |
e08e52cf | 2891 | SvTAINTED_on(rv); |
9274aefd DM |
2892 | SvTAINTED_on(SvRV(rv)); |
2893 | } | |
c8c13c22 JB |
2894 | XPUSHs(rv); |
2895 | RETURN; | |
8782bef2 GB |
2896 | } |
2897 | ||
a0d0e21e LW |
2898 | PP(pp_match) |
2899 | { | |
20b7effb | 2900 | dSP; dTARG; |
eb578fdb | 2901 | PMOP *pm = cPMOP; |
d65afb4b | 2902 | PMOP *dynpm = pm; |
eb578fdb | 2903 | const char *s; |
5c144d81 | 2904 | const char *strend; |
99a90e59 | 2905 | SSize_t curpos = 0; /* initial pos() or current $+[0] */ |
a0d0e21e | 2906 | I32 global; |
7fadf4a7 | 2907 | U8 r_flags = 0; |
5c144d81 | 2908 | const char *truebase; /* Start of string */ |
eb578fdb | 2909 | REGEXP *rx = PM_GETRE(pm); |
196a02af | 2910 | regexp *prog = ReANY(rx); |
b3eb6a9b | 2911 | bool rxtainted; |
1c23e2bd | 2912 | const U8 gimme = GIMME_V; |
a0d0e21e | 2913 | STRLEN len; |
a3b680e6 | 2914 | const I32 oldsave = PL_savestack_ix; |
e60df1fa | 2915 | I32 had_zerolen = 0; |
b1422d62 | 2916 | MAGIC *mg = NULL; |
a0d0e21e | 2917 | |
533c011a | 2918 | if (PL_op->op_flags & OPf_STACKED) |
a0d0e21e LW |
2919 | TARG = POPs; |
2920 | else { | |
9399c607 DM |
2921 | if (ARGTARG) |
2922 | GETTARGET; | |
2923 | else { | |
2924 | TARG = DEFSV; | |
2925 | } | |
a0d0e21e LW |
2926 | EXTEND(SP,1); |
2927 | } | |
d9f424b2 | 2928 | |
c277df42 | 2929 | PUTBACK; /* EVAL blocks need stack_sp. */ |
69dc4b30 FC |
2930 | /* Skip get-magic if this is a qr// clone, because regcomp has |
2931 | already done it. */ | |
196a02af | 2932 | truebase = prog->mother_re |
69dc4b30 FC |
2933 | ? SvPV_nomg_const(TARG, len) |
2934 | : SvPV_const(TARG, len); | |
f1d31338 | 2935 | if (!truebase) |
2269b42e | 2936 | DIE(aTHX_ "panic: pp_match"); |
f1d31338 | 2937 | strend = truebase + len; |
196a02af | 2938 | rxtainted = (RXp_ISTAINTED(prog) || |
284167a5 | 2939 | (TAINT_get && (pm->op_pmflags & PMf_RETAINT))); |
9212bbba | 2940 | TAINT_NOT; |
a0d0e21e | 2941 | |
6c864ec2 | 2942 | /* We need to know this in case we fail out early - pos() must be reset */ |
de0df3c0 MH |
2943 | global = dynpm->op_pmflags & PMf_GLOBAL; |
2944 | ||
d65afb4b | 2945 | /* PMdf_USED is set after a ?? matches once */ |
c737faaf YO |
2946 | if ( |
2947 | #ifdef USE_ITHREADS | |
2948 | SvREADONLY(PL_regex_pad[pm->op_pmoffset]) | |
2949 | #else | |
2950 | pm->op_pmflags & PMf_USED | |
2951 | #endif | |
2952 | ) { | |
e5dc5375 | 2953 | DEBUG_r(PerlIO_printf(Perl_debug_log, "?? already matched once")); |
de0df3c0 | 2954 | goto nope; |
a0d0e21e LW |
2955 | } |
2956 | ||
5585e758 | 2957 | /* handle the empty pattern */ |
196a02af | 2958 | if (!RX_PRELEN(rx) && PL_curpm && !prog->mother_re) { |
5585e758 YO |
2959 | if (PL_curpm == PL_reg_curpm) { |
2960 | if (PL_curpm_under) { | |
2961 | if (PL_curpm_under == PL_reg_curpm) { | |
2962 | Perl_croak(aTHX_ "Infinite recursion via empty pattern"); | |
2963 | } else { | |
2964 | pm = PL_curpm_under; | |
2965 | } | |
2966 | } | |
2967 | } else { | |
2968 | pm = PL_curpm; | |
2969 | } | |
2970 | rx = PM_GETRE(pm); | |
196a02af | 2971 | prog = ReANY(rx); |
a0d0e21e | 2972 | } |
d65afb4b | 2973 | |
196a02af | 2974 | if (RXp_MINLEN(prog) >= 0 && (STRLEN)RXp_MINLEN(prog) > len) { |
75d43e96 | 2975 | DEBUG_r(PerlIO_printf(Perl_debug_log, "String shorter than min possible regex match (%" |
147e3846 | 2976 | UVuf " < %" IVdf ")\n", |
196a02af | 2977 | (UV)len, (IV)RXp_MINLEN(prog))); |
de0df3c0 | 2978 | goto nope; |
e5dc5375 | 2979 | } |
c277df42 | 2980 | |
8ef97b0e | 2981 | /* get pos() if //g */ |
de0df3c0 | 2982 | if (global) { |
b1422d62 | 2983 | mg = mg_find_mglob(TARG); |
8ef97b0e | 2984 | if (mg && mg->mg_len >= 0) { |
25fdce4a | 2985 | curpos = MgBYTEPOS(mg, TARG, truebase, len); |
8ef97b0e DM |
2986 | /* last time pos() was set, it was zero-length match */ |
2987 | if (mg->mg_flags & MGf_MINMATCH) | |
2988 | had_zerolen = 1; | |
2989 | } | |
a0d0e21e | 2990 | } |
8ef97b0e | 2991 | |
6e240d0b | 2992 | #ifdef PERL_SAWAMPERSAND |
196a02af | 2993 | if ( RXp_NPARENS(prog) |
6502e081 | 2994 | || PL_sawampersand |
196a02af | 2995 | || (RXp_EXTFLAGS(prog) & (RXf_EVAL_SEEN|RXf_PMf_KEEPCOPY)) |
5b0e71e9 | 2996 | || (dynpm->op_pmflags & PMf_KEEPCOPY) |
6e240d0b FC |
2997 | ) |
2998 | #endif | |
2999 | { | |
6502e081 DM |
3000 | r_flags |= (REXEC_COPY_STR|REXEC_COPY_SKIP_PRE); |
3001 | /* in @a =~ /(.)/g, we iterate multiple times, but copy the buffer | |
3002 | * only on the first iteration. Therefore we need to copy $' as well | |
3003 | * as $&, to make the rest of the string available for captures in | |
3004 | * subsequent iterations */ | |
3005 | if (! (global && gimme == G_ARRAY)) | |
3006 | r_flags |= REXEC_COPY_SKIP_POST; | |
3007 | }; | |
5b0e71e9 DM |
3008 | #ifdef PERL_SAWAMPERSAND |
3009 | if (dynpm->op_pmflags & PMf_KEEPCOPY) | |
3010 | /* handle KEEPCOPY in pmop but not rx, eg $r=qr/a/; /$r/p */ | |
3011 | r_flags &= ~(REXEC_COPY_SKIP_PRE|REXEC_COPY_SKIP_POST); | |
3012 | #endif | |
22e551b9 | 3013 | |
f1d31338 DM |
3014 | s = truebase; |
3015 | ||
d7be1480 | 3016 | play_it_again: |
985afbc1 | 3017 | if (global) |
03c83e26 | 3018 | s = truebase + curpos; |
f722798b | 3019 | |
77da2310 | 3020 | if (!CALLREGEXEC(rx, (char*)s, (char *)strend, (char*)truebase, |
03c83e26 | 3021 | had_zerolen, TARG, NULL, r_flags)) |
03b6c93d | 3022 | goto nope; |
77da2310 NC |
3023 | |
3024 | PL_curpm = pm; | |
985afbc1 | 3025 | if (dynpm->op_pmflags & PMf_ONCE) |
c737faaf | 3026 | #ifdef USE_ITHREADS |
77da2310 | 3027 | SvREADONLY_on(PL_regex_pad[dynpm->op_pmoffset]); |
c737faaf | 3028 | #else |
77da2310 | 3029 | dynpm->op_pmflags |= PMf_USED; |
c737faaf | 3030 | #endif |
a0d0e21e | 3031 | |
72311751 | 3032 | if (rxtainted) |
196a02af DM |
3033 | RXp_MATCH_TAINTED_on(prog); |
3034 | TAINT_IF(RXp_MATCH_TAINTED(prog)); | |
35c2ccc3 DM |
3035 | |
3036 | /* update pos */ | |
3037 | ||
3038 | if (global && (gimme != G_ARRAY || (dynpm->op_pmflags & PMf_CONTINUE))) { | |
b1422d62 | 3039 | if (!mg) |
35c2ccc3 | 3040 | mg = sv_magicext_mglob(TARG); |
196a02af DM |
3041 | MgBYTEPOS_set(mg, TARG, truebase, RXp_OFFS(prog)[0].end); |
3042 | if (RXp_ZERO_LEN(prog)) | |
adf51885 DM |
3043 | mg->mg_flags |= MGf_MINMATCH; |
3044 | else | |
3045 | mg->mg_flags &= ~MGf_MINMATCH; | |
35c2ccc3 DM |
3046 | } |
3047 | ||
196a02af | 3048 | if ((!RXp_NPARENS(prog) && !global) || gimme != G_ARRAY) { |
bf9dff51 DM |
3049 | LEAVE_SCOPE(oldsave); |
3050 | RETPUSHYES; | |
3051 | } | |
3052 | ||
88ab22af DM |
3053 | /* push captures on stack */ |
3054 | ||
bf9dff51 | 3055 | { |
196a02af | 3056 | const I32 nparens = RXp_NPARENS(prog); |
a3b680e6 | 3057 | I32 i = (global && !nparens) ? 1 : 0; |
a0d0e21e | 3058 | |
c277df42 | 3059 | SPAGAIN; /* EVAL blocks could move the stack. */ |
ffc61ed2 JH |
3060 | EXTEND(SP, nparens + i); |
3061 | EXTEND_MORTAL(nparens + i); | |
3062 | for (i = !i; i <= nparens; i++) { | |
a0d0e21e | 3063 | PUSHs(sv_newmortal()); |
196a02af DM |
3064 | if (LIKELY((RXp_OFFS(prog)[i].start != -1) |
3065 | && RXp_OFFS(prog)[i].end != -1 )) | |
5d9574c1 | 3066 | { |
196a02af DM |
3067 | const I32 len = RXp_OFFS(prog)[i].end - RXp_OFFS(prog)[i].start; |
3068 | const char * const s = RXp_OFFS(prog)[i].start + truebase; | |
3069 | if (UNLIKELY( RXp_OFFS(prog)[i].end < 0 | |
3070 | || RXp_OFFS(prog)[i].start < 0 | |
3071 | || len < 0 | |
3072 | || len > strend - s) | |
3073 | ) | |
5637ef5b | 3074 | DIE(aTHX_ "panic: pp_match start/end pointers, i=%ld, " |
147e3846 | 3075 | "start=%ld, end=%ld, s=%p, strend=%p, len=%" UVuf, |
196a02af DM |
3076 | (long) i, (long) RXp_OFFS(prog)[i].start, |
3077 | (long)RXp_OFFS(prog)[i].end, s, strend, (UV) len); | |
a0d0e21e | 3078 | sv_setpvn(*SP, s, len); |
cce850e4 | 3079 | if (DO_UTF8(TARG) && is_utf8_string((U8*)s, len)) |
a197cbdd | 3080 | SvUTF8_on(*SP); |
a0d0e21e LW |
3081 | } |
3082 | } | |
3083 | if (global) { | |
196a02af DM |
3084 | curpos = (UV)RXp_OFFS(prog)[0].end; |
3085 | had_zerolen = RXp_ZERO_LEN(prog); | |
c277df42 | 3086 | PUTBACK; /* EVAL blocks may use stack */ |
cf93c79d | 3087 | r_flags |= REXEC_IGNOREPOS | REXEC_NOT_FIRST; |
a0d0e21e LW |
3088 | goto play_it_again; |
3089 | } | |
4633a7c4 | 3090 | LEAVE_SCOPE(oldsave); |
a0d0e21e LW |
3091 | RETURN; |
3092 | } | |
e5964223 | 3093 | NOT_REACHED; /* NOTREACHED */ |
a0d0e21e | 3094 | |
7b52d656 | 3095 | nope: |
d65afb4b | 3096 | if (global && !(dynpm->op_pmflags & PMf_CONTINUE)) { |
b1422d62 DM |
3097 | if (!mg) |
3098 | mg = mg_find_mglob(TARG); | |
3099 | if (mg) | |
3100 | mg->mg_len = -1; | |
a0d0e21e | 3101 | } |
4633a7c4 | 3102 | LEAVE_SCOPE(oldsave); |
a0d0e21e LW |
3103 | if (gimme == G_ARRAY) |
3104 | RETURN; | |
3105 | RETPUSHNO; | |
3106 | } | |
3107 | ||
3108 | OP * | |
864dbfa3 | 3109 | Perl_do_readline(pTHX) |
a0d0e21e | 3110 | { |
20b7effb | 3111 | dSP; dTARGETSTACKED; |
eb578fdb | 3112 | SV *sv; |
a0d0e21e LW |
3113 | STRLEN tmplen = 0; |
3114 | STRLEN offset; | |
760ac839 | 3115 | PerlIO *fp; |
eb578fdb KW |
3116 | IO * const io = GvIO(PL_last_in_gv); |
3117 | const I32 type = PL_op->op_type; | |
1c23e2bd | 3118 | const U8 gimme = GIMME_V; |
a0d0e21e | 3119 | |
6136c704 | 3120 | if (io) { |
50db69d8 | 3121 | const MAGIC *const mg = SvTIED_mg((const SV *)io, PERL_MAGIC_tiedscalar); |
6136c704 | 3122 | if (mg) { |
3e0cb5de | 3123 | Perl_tied_method(aTHX_ SV_CONST(READLINE), SP, MUTABLE_SV(io), mg, gimme, 0); |
6136c704 | 3124 | if (gimme == G_SCALAR) { |
50db69d8 NC |
3125 | SPAGAIN; |
3126 | SvSetSV_nosteal(TARG, TOPs); | |
3127 | SETTARG; | |
6136c704 | 3128 | } |
50db69d8 | 3129 | return NORMAL; |
0b7c7b4f | 3130 | } |
e79b0511 | 3131 | } |
4608196e | 3132 | fp = NULL; |
a0d0e21e LW |
3133 | if (io) { |
3134 | fp = IoIFP(io); | |
3135 | if (!fp) { | |
3136 | if (IoFLAGS(io) & IOf_ARGV) { | |
3137 | if (IoFLAGS(io) & IOf_START) { | |
a0d0e21e | 3138 | IoLINES(io) = 0; |
b9f2b683 | 3139 | if (av_tindex(GvAVn(PL_last_in_gv)) < 0) { |
1d7c1841 | 3140 | IoFLAGS(io) &= ~IOf_START; |
d5eb9a46 | 3141 | do_open6(PL_last_in_gv, "-", 1, NULL, NULL, 0); |
4bac9ae4 | 3142 | SvTAINTED_off(GvSVn(PL_last_in_gv)); /* previous tainting irrelevant */ |
76f68e9b | 3143 | sv_setpvs(GvSVn(PL_last_in_gv), "-"); |
3280af22 | 3144 | SvSETMAGIC(GvSV(PL_last_in_gv)); |
a2008d6d GS |
3145 | fp = IoIFP(io); |
3146 | goto have_fp; | |
a0d0e21e LW |
3147 | } |
3148 | } | |
157fb5a1 | 3149 | fp = nextargv(PL_last_in_gv, PL_op->op_flags & OPf_SPECIAL); |
a0d0e21e | 3150 | if (!fp) { /* Note: fp != IoIFP(io) */ |
3280af22 | 3151 | (void)do_close(PL_last_in_gv, FALSE); /* now it does*/ |
a0d0e21e LW |
3152 | } |
3153 | } | |
0d44d22b NC |
3154 | else if (type == OP_GLOB) |
3155 | fp = Perl_start_glob(aTHX_ POPs, io); | |
a0d0e21e LW |
3156 | } |
3157 | else if (type == OP_GLOB) | |
3158 | SP--; | |
7716c5c5 | 3159 | else if (IoTYPE(io) == IoTYPE_WRONLY) { |
a5390457 | 3160 | report_wrongway_fh(PL_last_in_gv, '>'); |
a00b5bd3 | 3161 | } |
a0d0e21e LW |
3162 | } |
3163 | if (!fp) { | |
041457d9 | 3164 | if ((!io || !(IoFLAGS(io) & IOf_START)) |
de7dabb6 TC |
3165 | && ckWARN(WARN_CLOSED) |
3166 | && type != OP_GLOB) | |
041457d9 | 3167 | { |
de7dabb6 | 3168 | report_evil_fh(PL_last_in_gv); |
3f4520fe | 3169 | } |
54310121 | 3170 | if (gimme == G_SCALAR) { |
79628082 | 3171 | /* undef TARG, and push that undefined value */ |
ba92458f | 3172 | if (type != OP_RCATLINE) { |
3773545d | 3173 | sv_set_undef(TARG); |
ba92458f | 3174 | } |
a0d0e21e LW |
3175 | PUSHTARG; |
3176 | } | |
3177 | RETURN; | |
3178 | } | |
a2008d6d | 3179 | have_fp: |
54310121 | 3180 | if (gimme == G_SCALAR) { |
a0d0e21e | 3181 | sv = TARG; |
0f722b55 RGS |
3182 | if (type == OP_RCATLINE && SvGMAGICAL(sv)) |
3183 | mg_get(sv); | |
48de12d9 RGS |
3184 | if (SvROK(sv)) { |
3185 | if (type == OP_RCATLINE) | |
5668452f | 3186 | SvPV_force_nomg_nolen(sv); |
48de12d9 RGS |
3187 | else |
3188 | sv_unref(sv); | |
3189 | } | |
f7877b28 | 3190 | else if (isGV_with_GP(sv)) { |
5668452f | 3191 | SvPV_force_nomg_nolen(sv); |
f7877b28 | 3192 | } |
862a34c6 | 3193 | SvUPGRADE(sv, SVt_PV); |
a0d0e21e | 3194 | tmplen = SvLEN(sv); /* remember if already alloced */ |
e3918bb7 | 3195 | if (!tmplen && !SvREADONLY(sv) && !SvIsCOW(sv)) { |
f72e8700 JJ |
3196 | /* try short-buffering it. Please update t/op/readline.t |
3197 | * if you change the growth length. | |
3198 | */ | |
3199 | Sv_Grow(sv, 80); | |
3200 | } | |
2b5e58c4 AMS |
3201 | offset = 0; |
3202 | if (type == OP_RCATLINE && SvOK(sv)) { | |
3203 | if (!SvPOK(sv)) { | |
5668452f | 3204 | SvPV_force_nomg_nolen(sv); |
2b5e58c4 | 3205 | } |
a0d0e21e | 3206 | offset = SvCUR(sv); |
2b5e58c4 | 3207 | } |
a0d0e21e | 3208 | } |
54310121 | 3209 | else { |
561b68a9 | 3210 | sv = sv_2mortal(newSV(80)); |
54310121 | 3211 | offset = 0; |
3212 | } | |
fbad3eb5 | 3213 | |
3887d568 AP |
3214 | /* This should not be marked tainted if the fp is marked clean */ |
3215 | #define MAYBE_TAINT_LINE(io, sv) \ | |
3216 | if (!(IoFLAGS(io) & IOf_UNTAINT)) { \ | |
3217 | TAINT; \ | |
3218 | SvTAINTED_on(sv); \ | |
3219 | } | |
3220 | ||
684bef36 | 3221 | /* delay EOF state for a snarfed empty file */ |
fbad3eb5 | 3222 | #define SNARF_EOF(gimme,rs,io,sv) \ |
684bef36 | 3223 | (gimme != G_SCALAR || SvCUR(sv) \ |
b9fee9ba | 3224 | || (IoFLAGS(io) & IOf_NOLINE) || !RsSNARF(rs)) |
fbad3eb5 | 3225 | |
a0d0e21e | 3226 | for (;;) { |
09e8efcc | 3227 | PUTBACK; |
fbad3eb5 | 3228 | if (!sv_gets(sv, fp, offset) |
2d726892 TF |
3229 | && (type == OP_GLOB |
3230 | || SNARF_EOF(gimme, PL_rs, io, sv) | |
3231 | || PerlIO_error(fp))) | |
fbad3eb5 | 3232 | { |
760ac839 | 3233 | PerlIO_clearerr(fp); |
a0d0e21e | 3234 | if (IoFLAGS(io) & IOf_ARGV) { |
157fb5a1 | 3235 | fp = nextargv(PL_last_in_gv, PL_op->op_flags & OPf_SPECIAL); |
a0d0e21e LW |
3236 | if (fp) |
3237 | continue; | |
3280af22 | 3238 | (void)do_close(PL_last_in_gv, FALSE); |
a0d0e21e LW |
3239 | } |
3240 | else if (type == OP_GLOB) { | |
a2a5de95 NC |
3241 | if (!do_close(PL_last_in_gv, FALSE)) { |
3242 | Perl_ck_warner(aTHX_ packWARN(WARN_GLOB), | |
3243 | "glob failed (child exited with status %d%s)", | |
3244 | (int)(STATUS_CURRENT >> 8), | |
3245 | (STATUS_CURRENT & 0x80) ? ", core dumped" : ""); | |
4eb79ab5 | 3246 | } |
a0d0e21e | 3247 | } |
54310121 | 3248 | if (gimme == G_SCALAR) { |
ba92458f AE |
3249 | if (type != OP_RCATLINE) { |
3250 | SV_CHECK_THINKFIRST_COW_DROP(TARG); | |
0c34ef67 | 3251 | SvOK_off(TARG); |
ba92458f | 3252 | } |
09e8efcc | 3253 | SPAGAIN; |
a0d0e21e LW |
3254 | PUSHTARG; |
3255 | } | |
3887d568 | 3256 | MAYBE_TAINT_LINE(io, sv); |
a0d0e21e LW |
3257 | RETURN; |
3258 | } | |
3887d568 | 3259 | MAYBE_TAINT_LINE(io, sv); |
a0d0e21e | 3260 | IoLINES(io)++; |
b9fee9ba | 3261 | IoFLAGS(io) |= IOf_NOLINE; |
71be2cbc | 3262 | SvSETMAGIC(sv); |
09e8efcc | 3263 | SPAGAIN; |
a0d0e21e | 3264 | XPUSHs(sv); |
a0d0e21e | 3265 | if (type == OP_GLOB) { |
349d4f2f | 3266 | const char *t1; |
45a23732 | 3267 | Stat_t statbuf; |
a0d0e21e | 3268 | |
3280af22 | 3269 | if (SvCUR(sv) > 0 && SvCUR(PL_rs) > 0) { |
6136c704 | 3270 | char * const tmps = SvEND(sv) - 1; |
aa07b2f6 | 3271 | if (*tmps == *SvPVX_const(PL_rs)) { |
c07a80fd | 3272 | *tmps = '\0'; |
b162af07 | 3273 | SvCUR_set(sv, SvCUR(sv) - 1); |
c07a80fd | 3274 | } |
3275 | } | |
349d4f2f | 3276 | for (t1 = SvPVX_const(sv); *t1; t1++) |
b51c3e77 CB |
3277 | #ifdef __VMS |
3278 | if (strchr("*%?", *t1)) | |
3279 | #else | |
7ad1e72d | 3280 | if (strchr("$&*(){}[]'\";\\|?<>~`", *t1)) |
b51c3e77 | 3281 | #endif |
a0d0e21e | 3282 | break; |
45a23732 | 3283 | if (*t1 && PerlLIO_lstat(SvPVX_const(sv), &statbuf) < 0) { |
a0d0e21e LW |
3284 | (void)POPs; /* Unmatched wildcard? Chuck it... */ |
3285 | continue; | |
3286 | } | |
2d79bf7f | 3287 | } else if (SvUTF8(sv)) { /* OP_READLINE, OP_RCATLINE */ |
d4c19fe8 AL |
3288 | if (ckWARN(WARN_UTF8)) { |
3289 | const U8 * const s = (const U8*)SvPVX_const(sv) + offset; | |
3290 | const STRLEN len = SvCUR(sv) - offset; | |
3291 | const U8 *f; | |
3292 | ||
3293 | if (!is_utf8_string_loc(s, len, &f)) | |
3294 | /* Emulate :encoding(utf8) warning in the same case. */ | |
3295 | Perl_warner(aTHX_ packWARN(WARN_UTF8), | |
3296 | "utf8 \"\\x%02X\" does not map to Unicode", | |
3297 | f < (U8*)SvEND(sv) ? *f : 0); | |
3298 | } | |
a0d0e21e | 3299 | } |
54310121 | 3300 | if (gimme == G_ARRAY) { |
a0d0e21e | 3301 | if (SvLEN(sv) - SvCUR(sv) > 20) { |
1da4ca5f | 3302 | SvPV_shrink_to_cur(sv); |
a0d0e21e | 3303 | } |
561b68a9 | 3304 | sv = sv_2mortal(newSV(80)); |
a0d0e21e LW |
3305 | continue; |
3306 | } | |
54310121 | 3307 | else if (gimme == G_SCALAR && !tmplen && SvLEN(sv) - SvCUR(sv) > 80) { |
a0d0e21e | 3308 | /* try to reclaim a bit of scalar space (only on 1st alloc) */ |
d5b5861b NC |
3309 | const STRLEN new_len |
3310 | = SvCUR(sv) < 60 ? 80 : SvCUR(sv)+40; /* allow some slop */ | |
1da4ca5f | 3311 | SvPV_renew(sv, new_len); |
a0d0e21e LW |
3312 | } |
3313 | RETURN; | |
3314 | } | |
3315 | } | |
3316 | ||
a0d0e21e LW |
3317 | PP(pp_helem) |
3318 | { | |
20b7effb | 3319 | dSP; |
760ac839 | 3320 | HE* he; |
ae77835f | 3321 | SV **svp; |
c445ea15 | 3322 | SV * const keysv = POPs; |
85fbaab2 | 3323 | HV * const hv = MUTABLE_HV(POPs); |
a3b680e6 AL |
3324 | const U32 lval = PL_op->op_flags & OPf_MOD || LVRET; |
3325 | const U32 defer = PL_op->op_private & OPpLVAL_DEFER; | |
be6c24e0 | 3326 | SV *sv; |
92970b93 | 3327 | const bool localizing = PL_op->op_private & OPpLVAL_INTRO; |
d30e492c | 3328 | bool preeminent = TRUE; |
a0d0e21e | 3329 | |
6dfc73ea S |
3330 | if (SvTYPE(hv) != SVt_PVHV) |
3331 | RETPUSHUNDEF; | |
d4c19fe8 | 3332 | |
92970b93 | 3333 | if (localizing) { |
d4c19fe8 AL |
3334 | MAGIC *mg; |
3335 | HV *stash; | |
d30e492c VP |
3336 | |
3337 | /* If we can determine whether the element exist, | |
3338 | * Try to preserve the existenceness of a tied hash | |
3339 | * element by using EXISTS and DELETE if possible. | |
3340 | * Fallback to FETCH and STORE otherwise. */ | |
2c5f48c2 | 3341 | if (SvCANEXISTDELETE(hv)) |
d30e492c | 3342 | preeminent = hv_exists_ent(hv, keysv, 0); |
d4c19fe8 | 3343 | } |
d30e492c | 3344 | |
5f9d7e2b | 3345 | he = hv_fetch_ent(hv, keysv, lval && !defer, 0); |
d4c19fe8 | 3346 | svp = he ? &HeVAL(he) : NULL; |
a0d0e21e | 3347 | if (lval) { |
746f6409 | 3348 | if (!svp || !*svp || *svp == &PL_sv_undef) { |
68dc0745 | 3349 | SV* lv; |
3350 | SV* key2; | |
2d8e6c8d | 3351 | if (!defer) { |
be2597df | 3352 | DIE(aTHX_ PL_no_helem_sv, SVfARG(keysv)); |
2d8e6c8d | 3353 | } |
68dc0745 | 3354 | lv = sv_newmortal(); |
3355 | sv_upgrade(lv, SVt_PVLV); | |
3356 | LvTYPE(lv) = 'y'; | |
6136c704 | 3357 | sv_magic(lv, key2 = newSVsv(keysv), PERL_MAGIC_defelem, NULL, 0); |
fc2b2dca | 3358 | SvREFCNT_dec_NN(key2); /* sv_magic() increments refcount */ |
0ad694a7 | 3359 | LvTARG(lv) = SvREFCNT_inc_simple_NN(hv); |
68dc0745 | 3360 | LvTARGLEN(lv) = 1; |
3361 | PUSHs(lv); | |
3362 | RETURN; | |
3363 | } | |
92970b93 | 3364 | if (localizing) { |
6881372e | 3365 | if (HvNAME_get(hv) && isGV_or_RVCV(*svp)) |
159b6efe | 3366 | save_gp(MUTABLE_GV(*svp), !(PL_op->op_flags & OPf_SPECIAL)); |
47cfc530 VP |
3367 | else if (preeminent) |
3368 | save_helem_flags(hv, keysv, svp, | |
3369 | (PL_op->op_flags & OPf_SPECIAL) ? 0 : SAVEf_SETMAGIC); | |
3370 | else | |
3371 | SAVEHDELETE(hv, keysv); | |
5f05dabc | 3372 | } |
9026059d GG |
3373 | else if (PL_op->op_private & OPpDEREF) { |
3374 | PUSHs(vivify_ref(*svp, PL_op->op_private & OPpDEREF)); | |
3375 | RETURN; | |
3376 | } | |
a0d0e21e | 3377 | } |
746f6409 | 3378 | sv = (svp && *svp ? *svp : &PL_sv_undef); |
fd69380d DM |
3379 | /* Originally this did a conditional C<sv = sv_mortalcopy(sv)>; this |
3380 | * was to make C<local $tied{foo} = $tied{foo}> possible. | |
3381 | * However, it seems no longer to be needed for that purpose, and | |
3382 | * introduced a new bug: stuff like C<while ($hash{taintedval} =~ /.../g> | |
3383 | * would loop endlessly since the pos magic is getting set on the | |
3384 | * mortal copy and lost. However, the copy has the effect of | |
3385 | * triggering the get magic, and losing it altogether made things like | |
3386 | * c<$tied{foo};> in void context no longer do get magic, which some | |
3387 | * code relied on. Also, delayed triggering of magic on @+ and friends | |
3388 | * meant the original regex may be out of scope by now. So as a | |
3389 | * compromise, do the get magic here. (The MGf_GSKIP flag will stop it | |
3390 | * being called too many times). */ | |
39cf747a | 3391 | if (!lval && SvRMAGICAL(hv) && SvGMAGICAL(sv)) |
fd69380d | 3392 | mg_get(sv); |
be6c24e0 | 3393 | PUSHs(sv); |
a0d0e21e LW |
3394 | RETURN; |
3395 | } | |
3396 | ||
fedf30e1 DM |
3397 | |
3398 | /* a stripped-down version of Perl_softref2xv() for use by | |
3399 | * pp_multideref(), which doesn't use PL_op->op_flags */ | |
3400 | ||
f9db5646 | 3401 | STATIC GV * |
fedf30e1 DM |
3402 | S_softref2xv_lite(pTHX_ SV *const sv, const char *const what, |
3403 | const svtype type) | |
3404 | { | |
3405 | if (PL_op->op_private & HINT_STRICT_REFS) { | |
3406 | if (SvOK(sv)) | |
3407 | Perl_die(aTHX_ PL_no_symref_sv, sv, | |
3408 | (SvPOKp(sv) && SvCUR(sv)>32 ? "..." : ""), what); | |
3409 | else | |
3410 | Perl_die(aTHX_ PL_no_usym, what); | |
3411 | } | |
3412 | if (!SvOK(sv)) | |
3413 | Perl_die(aTHX_ PL_no_usym, what); | |
3414 | return gv_fetchsv_nomg(sv, GV_ADD, type); | |
3415 | } | |
3416 | ||
3417 | ||
79815f56 DM |
3418 | /* Handle one or more aggregate derefs and array/hash indexings, e.g. |
3419 | * $h->{foo} or $a[0]{$key}[$i] or f()->[1] | |
fedf30e1 DM |
3420 | * |
3421 | * op_aux points to an array of unions of UV / IV / SV* / PADOFFSET. | |
79815f56 DM |
3422 | * Each of these either contains a set of actions, or an argument, such as |
3423 | * an IV to use as an array index, or a lexical var to retrieve. | |
3424 | * Several actions re stored per UV; we keep shifting new actions off the | |
3425 | * one UV, and only reload when it becomes zero. | |
fedf30e1 DM |
3426 | */ |
3427 | ||
3428 | PP(pp_multideref) | |
3429 | { | |
3430 | SV *sv = NULL; /* init to avoid spurious 'may be used uninitialized' */ | |
3431 | UNOP_AUX_item *items = cUNOP_AUXx(PL_op)->op_aux; | |
3432 | UV actions = items->uv; | |
3433 | ||
3434 | assert(actions); | |
3435 | /* this tells find_uninit_var() where we're up to */ | |
3436 | PL_multideref_pc = items; | |
3437 | ||
3438 | while (1) { | |
3439 | /* there are three main classes of action; the first retrieve | |
3440 | * the initial AV or HV from a variable or the stack; the second | |
3441 | * does the equivalent of an unrolled (/DREFAV, rv2av, aelem), | |
3442 | * the third an unrolled (/DREFHV, rv2hv, helem). | |
3443 | */ | |
3444 | switch (actions & MDEREF_ACTION_MASK) { | |
3445 | ||
3446 | case MDEREF_reload: | |
3447 | actions = (++items)->uv; | |
3448 | continue; | |
3449 | ||
3450 | case MDEREF_AV_padav_aelem: /* $lex[...] */ | |
3451 | sv = PAD_SVl((++items)->pad_offset); | |
3452 | goto do_AV_aelem; | |
3453 | ||
3454 | case MDEREF_AV_gvav_aelem: /* $pkg[...] */ | |
3455 | sv = UNOP_AUX_item_sv(++items); | |
3456 | assert(isGV_with_GP(sv)); | |
3457 | sv = (SV*)GvAVn((GV*)sv); | |
3458 | goto do_AV_aelem; | |
3459 | ||
3460 | case MDEREF_AV_pop_rv2av_aelem: /* expr->[...] */ | |
3461 | { | |
3462 | dSP; | |
3463 | sv = POPs; | |
3464 | PUTBACK; | |
3465 | goto do_AV_rv2av_aelem; | |
3466 | } | |
3467 | ||
3468 | case MDEREF_AV_gvsv_vivify_rv2av_aelem: /* $pkg->[...] */ | |
3469 | sv = UNOP_AUX_item_sv(++items); | |
3470 | assert(isGV_with_GP(sv)); | |
3471 | sv = GvSVn((GV*)sv); | |
3472 | goto do_AV_vivify_rv2av_aelem; | |
3473 | ||
3474 | case MDEREF_AV_padsv_vivify_rv2av_aelem: /* $lex->[...] */ | |
3475 | sv = PAD_SVl((++items)->pad_offset); | |
3476 | /* FALLTHROUGH */ | |
3477 | ||
3478 | do_AV_vivify_rv2av_aelem: | |
3479 | case MDEREF_AV_vivify_rv2av_aelem: /* vivify, ->[...] */ | |
3480 | /* this is the OPpDEREF action normally found at the end of | |
3481 | * ops like aelem, helem, rv2sv */ | |
3482 | sv = vivify_ref(sv, OPpDEREF_AV); | |
3483 | /* FALLTHROUGH */ | |
3484 | ||
3485 | do_AV_rv2av_aelem: | |
3486 | /* this is basically a copy of pp_rv2av when it just has the | |
3487 | * sKR/1 flags */ | |
3488 | SvGETMAGIC(sv); | |
3489 | if (LIKELY(SvROK(sv))) { | |
3490 | if (UNLIKELY(SvAMAGIC(sv))) { | |
3491 | sv = amagic_deref_call(sv, to_av_amg); | |
3492 | } | |
3493 | sv = SvRV(sv); | |
3494 | if (UNLIKELY(SvTYPE(sv) != SVt_PVAV)) | |
3495 | DIE(aTHX_ "Not an ARRAY reference"); | |
3496 | } | |
3497 | else if (SvTYPE(sv) != SVt_PVAV) { | |
3498 | if (!isGV_with_GP(sv)) | |
3499 | sv = (SV*)S_softref2xv_lite(aTHX_ sv, "an ARRAY", SVt_PVAV); | |
3500 | sv = MUTABLE_SV(GvAVn((GV*)sv)); | |
3501 | } | |
3502 | /* FALLTHROUGH */ | |
3503 | ||
3504 | do_AV_aelem: | |
3505 | { | |
3506 | /* retrieve the key; this may be either a lexical or package | |
3507 | * var (whose index/ptr is stored as an item) or a signed | |
3508 | * integer constant stored as an item. | |
3509 | */ | |
3510 | SV *elemsv; | |
3511 | IV elem = 0; /* to shut up stupid compiler warnings */ | |
3512 | ||
3513 | ||
3514 | assert(SvTYPE(sv) == SVt_PVAV); | |
3515 | ||
3516 | switch (actions & MDEREF_INDEX_MASK) { | |
3517 | case MDEREF_INDEX_none: | |
3518 | goto finish; | |
3519 | case MDEREF_INDEX_const: | |
3520 | elem = (++items)->iv; | |
3521 | break; | |
3522 | case MDEREF_INDEX_padsv: | |
3523 | elemsv = PAD_SVl((++items)->pad_offset); | |
3524 | goto check_elem; | |
3525 | case MDEREF_INDEX_gvsv: | |
3526 | elemsv = UNOP_AUX_item_sv(++items); | |
3527 | assert(isGV_with_GP(elemsv)); | |
3528 | elemsv = GvSVn((GV*)elemsv); | |
3529 | check_elem: | |
3530 | if (UNLIKELY(SvROK(elemsv) && !SvGAMAGIC(elemsv) | |
3531 | && ckWARN(WARN_MISC))) | |
3532 | Perl_warner(aTHX_ packWARN(WARN_MISC), | |
147e3846 | 3533 | "Use of reference \"%" SVf "\" as array index", |
fedf30e1 DM |
3534 | SVfARG(elemsv)); |
3535 | /* the only time that S_find_uninit_var() needs this | |
3536 | * is to determine which index value triggered the | |
3537 | * undef warning. So just update it here. Note that | |
3538 | * since we don't save and restore this var (e.g. for | |
3539 | * tie or overload execution), its value will be | |
3540 | * meaningless apart from just here */ | |
3541 | PL_multideref_pc = items; | |
3542 | elem = SvIV(elemsv); | |
3543 | break; | |
3544 | } | |
3545 | ||
3546 | ||
3547 | /* this is basically a copy of pp_aelem with OPpDEREF skipped */ | |
3548 | ||
3549 | if (!(actions & MDEREF_FLAG_last)) { | |
3550 | SV** svp = av_fetch((AV*)sv, elem, 1); | |
3551 | if (!svp || ! (sv=*svp)) | |
3552 | DIE(aTHX_ PL_no_aelem, elem); | |
3553 | break; | |
3554 | } | |
3555 | ||
3556 | if (PL_op->op_private & | |
3557 | (OPpMULTIDEREF_EXISTS|OPpMULTIDEREF_DELETE)) | |
3558 | { | |
3559 | if (PL_op->op_private & OPpMULTIDEREF_EXISTS) { | |
3560 | sv = av_exists((AV*)sv, elem) ? &PL_sv_yes : &PL_sv_no; | |
3561 | } | |
3562 | else { | |
3563 | I32 discard = (GIMME_V == G_VOID) ? G_DISCARD : 0; | |
3564 | sv = av_delete((AV*)sv, elem, discard); | |
3565 | if (discard) | |
3566 | return NORMAL; | |
3567 | if (!sv) | |
3568 | sv = &PL_sv_undef; | |
3569 | } | |
3570 | } | |
3571 | else { | |
3572 | const U32 lval = PL_op->op_flags & OPf_MOD || LVRET; | |
3573 | const U32 defer = PL_op->op_private & OPpLVAL_DEFER; | |
3574 | const bool localizing = PL_op->op_private & OPpLVAL_INTRO; | |
3575 | bool preeminent = TRUE; | |
3576 | AV *const av = (AV*)sv; | |
3577 | SV** svp; | |
3578 | ||
3579 | if (UNLIKELY(localizing)) { | |
3580 | MAGIC *mg; | |
3581 | HV *stash; | |
3582 | ||
3583 | /* If we can determine whether the element exist, | |
3584 | * Try to preserve the existenceness of a tied array | |
3585 | * element by using EXISTS and DELETE if possible. | |
3586 | * Fallback to FETCH and STORE otherwise. */ | |
3587 | if (SvCANEXISTDELETE(av)) | |
3588 | preeminent = av_exists(av, elem); | |
3589 | } | |
3590 | ||
3591 | svp = av_fetch(av, elem, lval && !defer); | |
3592 | ||
3593 | if (lval) { | |
3594 | if (!svp || !(sv = *svp)) { | |
3595 | IV len; | |
3596 | if (!defer) | |
3597 | DIE(aTHX_ PL_no_aelem, elem); | |
3598 | len = av_tindex(av); | |
9ef753fe FC |
3599 | /* Resolve a negative index that falls within |
3600 | * the array. Leave it negative it if falls | |
3601 | * outside the array. */ | |
3602 | if (elem < 0 && len + elem >= 0) | |
3603 | elem = len + elem; | |
3604 | if (elem >= 0 && elem <= len) | |
3605 | /* Falls within the array. */ | |
3606 | sv = av_nonelem(av,elem); | |
3607 | else | |
3608 | /* Falls outside the array. If it is neg- | |
3609 | ative, magic_setdefelem will use the | |
3610 | index for error reporting. */ | |
3611 | sv = sv_2mortal(newSVavdefelem(av,elem,1)); | |
fedf30e1 DM |
3612 | } |
3613 | else { | |
3614 | if (UNLIKELY(localizing)) { | |
3615 | if (preeminent) { | |
3616 | save_aelem(av, elem, svp); | |
3617 | sv = *svp; /* may have changed */ | |
3618 | } | |
3619 | else | |
3620 | SAVEADELETE(av, elem); | |
3621 | } | |
3622 | } | |
3623 | } | |
3624 | else { | |
3625 | sv = (svp ? *svp : &PL_sv_undef); | |
3626 | /* see note in pp_helem() */ | |
3627 | if (SvRMAGICAL(av) && SvGMAGICAL(sv)) | |
3628 | mg_get(sv); | |
3629 | } | |
3630 | } | |
3631 | ||
3632 | } | |
3633 | finish: | |
3634 | { | |
3635 | dSP; | |
3636 | XPUSHs(sv); | |
3637 | RETURN; | |
3638 | } | |
3639 | /* NOTREACHED */ | |
3640 | ||
3641 | ||
3642 | ||
3643 | ||
3644 | case MDEREF_HV_padhv_helem: /* $lex{...} */ | |
3645 | sv = PAD_SVl((++items)->pad_offset); | |
3646 | goto do_HV_helem; | |
3647 | ||
3648 | case MDEREF_HV_gvhv_helem: /* $pkg{...} */ | |
3649 | sv = UNOP_AUX_item_sv(++items); | |
3650 | assert(isGV_with_GP(sv)); | |
3651 | sv = (SV*)GvHVn((GV*)sv); | |
3652 | goto do_HV_helem; | |
3653 | ||
3654 | case MDEREF_HV_pop_rv2hv_helem: /* expr->{...} */ | |
3655 | { | |
3656 | dSP; | |
3657 | sv = POPs; | |
3658 | PUTBACK; | |
3659 | goto do_HV_rv2hv_helem; | |
3660 | } | |
3661 | ||
3662 | case MDEREF_HV_gvsv_vivify_rv2hv_helem: /* $pkg->{...} */ | |
3663 | sv = UNOP_AUX_item_sv(++items); | |
3664 | assert(isGV_with_GP(sv)); | |
3665 | sv = GvSVn((GV*)sv); | |
3666 | goto do_HV_vivify_rv2hv_helem; | |
3667 | ||
3668 | case MDEREF_HV_padsv_vivify_rv2hv_helem: /* $lex->{...} */ | |
3669 | sv = PAD_SVl((++items)->pad_offset); | |
3670 | /* FALLTHROUGH */ | |
3671 | ||
3672 | do_HV_vivify_rv2hv_helem: | |
3673 | case MDEREF_HV_vivify_rv2hv_helem: /* vivify, ->{...} */ | |
3674 | /* this is the OPpDEREF action normally found at the end of | |
3675 | * ops like aelem, helem, rv2sv */ | |
3676 | sv = vivify_ref(sv, OPpDEREF_HV); | |
3677 | /* FALLTHROUGH */ | |
3678 | ||
3679 | do_HV_rv2hv_helem: | |
3680 | /* this is basically a copy of pp_rv2hv when it just has the | |
3681 | * sKR/1 flags (and pp_rv2hv is aliased to pp_rv2av) */ | |
3682 | ||
3683 | SvGETMAGIC(sv); | |
3684 | if (LIKELY(SvROK(sv))) { | |
3685 | if (UNLIKELY(SvAMAGIC(sv))) { | |
3686 | sv = amagic_deref_call(sv, to_hv_amg); | |
3687 | } | |
3688 | sv = SvRV(sv); | |
3689 | if (UNLIKELY(SvTYPE(sv) != SVt_PVHV)) | |
3690 | DIE(aTHX_ "Not a HASH reference"); | |
3691 | } | |
3692 | else if (SvTYPE(sv) != SVt_PVHV) { | |
3693 | if (!isGV_with_GP(sv)) | |
3694 | sv = (SV*)S_softref2xv_lite(aTHX_ sv, "a HASH", SVt_PVHV); | |
3695 | sv = MUTABLE_SV(GvHVn((GV*)sv)); | |
3696 | } | |
3697 | /* FALLTHROUGH */ | |
3698 | ||
3699 | do_HV_helem: | |
3700 | { | |
3701 | /* retrieve the key; this may be either a lexical / package | |
3702 | * var or a string constant, whose index/ptr is stored as an | |
3703 | * item | |
3704 | */ | |
3705 | SV *keysv = NULL; /* to shut up stupid compiler warnings */ | |
3706 | ||
3707 | assert(SvTYPE(sv) == SVt_PVHV); | |
3708 | ||
3709 | switch (actions & MDEREF_INDEX_MASK) { | |
3710 | case MDEREF_INDEX_none: | |
3711 | goto finish; | |
3712 | ||
3713 | case MDEREF_INDEX_const: | |
3714 | keysv = UNOP_AUX_item_sv(++items); | |
3715 | break; | |
3716 | ||
3717 | case MDEREF_INDEX_padsv: | |
3718 | keysv = PAD_SVl((++items)->pad_offset); | |
3719 | break; | |
3720 | ||
3721 | case MDEREF_INDEX_gvsv: | |
3722 | keysv = UNOP_AUX_item_sv(++items); | |
3723 | keysv = GvSVn((GV*)keysv); | |
3724 | break; | |
3725 | } | |
3726 | ||
3727 | /* see comment above about setting this var */ | |
3728 | PL_multideref_pc = items; | |
3729 | ||
3730 | ||
3731 | /* ensure that candidate CONSTs have been HEKified */ | |
3732 | assert( ((actions & MDEREF_INDEX_MASK) != MDEREF_INDEX_const) | |
3733 | || SvTYPE(keysv) >= SVt_PVMG | |
3734 | || !SvOK(keysv) | |
3735 | || SvROK(keysv) | |
3736 | || SvIsCOW_shared_hash(keysv)); | |
3737 | ||
3738 | /* this is basically a copy of pp_helem with OPpDEREF skipped */ | |
3739 | ||
3740 | if (!(actions & MDEREF_FLAG_last)) { | |
3741 | HE *he = hv_fetch_ent((HV*)sv, keysv, 1, 0); | |
3742 | if (!he || !(sv=HeVAL(he)) || sv == &PL_sv_undef) | |
3743 | DIE(aTHX_ PL_no_helem_sv, SVfARG(keysv)); | |
3744 | break; | |
3745 | } | |
3746 | ||
3747 | if (PL_op->op_private & | |
3748 | (OPpMULTIDEREF_EXISTS|OPpMULTIDEREF_DELETE)) | |
3749 | { | |
3750 | if (PL_op->op_private & OPpMULTIDEREF_EXISTS) { | |
3751 | sv = hv_exists_ent((HV*)sv, keysv, 0) | |
3752 | ? &PL_sv_yes : &PL_sv_no; | |
3753 | } | |
3754 | else { | |
3755 | I32 discard = (GIMME_V == G_VOID) ? G_DISCARD : 0; | |
3756 | sv = hv_delete_ent((HV*)sv, keysv, discard, 0); | |
3757 | if (discard) | |
3758 | return NORMAL; | |
3759 | if (!sv) | |
3760 | sv = &PL_sv_undef; | |
3761 | } | |
3762 | } | |
3763 | else { | |
3764 | const U32 lval = PL_op->op_flags & OPf_MOD || LVRET; | |
3765 | const U32 defer = PL_op->op_private & OPpLVAL_DEFER; | |
3766 | const bool localizing = PL_op->op_private & OPpLVAL_INTRO; | |
3767 | bool preeminent = TRUE; | |
3768 | SV **svp; | |
3769 | HV * const hv = (HV*)sv; | |
3770 | HE* he; | |
3771 | ||
3772 | if (UNLIKELY(localizing)) { | |
3773 | MAGIC *mg; | |
3774 | HV *stash; | |
3775 | ||
3776 | /* If we can determine whether the element exist, | |
3777 | * Try to preserve the existenceness of a tied hash | |
3778 | * element by using EXISTS and DELETE if possible. | |
3779 | * Fallback to FETCH and STORE otherwise. */ | |
3780 | if (SvCANEXISTDELETE(hv)) | |
3781 | preeminent = hv_exists_ent(hv, keysv, 0); | |
3782 | } | |
3783 | ||
3784 | he = hv_fetch_ent(hv, keysv, lval && !defer, 0); | |
3785 | svp = he ? &HeVAL(he) : NULL; | |
3786 | ||
3787 | ||
3788 | if (lval) { | |
3789 | if (!svp || !(sv = *svp) || sv == &PL_sv_undef) { | |
3790 | SV* lv; | |
3791 | SV* key2; | |
3792 | if (!defer) | |
3793 | DIE(aTHX_ PL_no_helem_sv, SVfARG(keysv)); | |
3794 | lv = sv_newmortal(); | |
3795 | sv_upgrade(lv, SVt_PVLV); | |
3796 | LvTYPE(lv) = 'y'; | |
3797 | sv_magic(lv, key2 = newSVsv(keysv), | |
3798 | PERL_MAGIC_defelem, NULL, 0); | |
3799 | /* sv_magic() increments refcount */ | |
3800 | SvREFCNT_dec_NN(key2); | |
0ad694a7 | 3801 | LvTARG(lv) = SvREFCNT_inc_simple_NN(hv); |
fedf30e1 DM |
3802 | LvTARGLEN(lv) = 1; |
3803 | sv = lv; | |
3804 | } | |
3805 | else { | |
3806 | if (localizing) { | |
a35c9018 | 3807 | if (HvNAME_get(hv) && isGV_or_RVCV(sv)) |
fedf30e1 DM |
3808 | save_gp(MUTABLE_GV(sv), |
3809 | !(PL_op->op_flags & OPf_SPECIAL)); | |
3810 | else if (preeminent) { | |
3811 | save_helem_flags(hv, keysv, svp, | |
3812 | (PL_op->op_flags & OPf_SPECIAL) | |
3813 | ? 0 : SAVEf_SETMAGIC); | |
3814 | sv = *svp; /* may have changed */ | |
3815 | } | |
3816 | else | |
3817 | SAVEHDELETE(hv, keysv); | |
3818 | } | |
3819 | } | |
3820 | } | |
3821 | else { | |
3822 | sv = (svp && *svp ? *svp : &PL_sv_undef); | |
3823 | /* see note in pp_helem() */ | |
3824 | if (SvRMAGICAL(hv) && SvGMAGICAL(sv)) | |
3825 | mg_get(sv); | |
3826 | } | |
3827 | } | |
3828 | goto finish; | |
3829 | } | |
3830 | ||
3831 | } /* switch */ | |
3832 | ||
3833 | actions >>= MDEREF_SHIFT; | |
3834 | } /* while */ | |
3835 | /* NOTREACHED */ | |
3836 | } | |
3837 | ||
3838 | ||
a0d0e21e LW |
3839 | PP(pp_iter) |
3840 | { | |
eb578fdb | 3841 | PERL_CONTEXT *cx; |
7d6c2cef | 3842 | SV *oldsv; |
1d7c1841 | 3843 | SV **itersvp; |
a0d0e21e | 3844 | |
84f05d57 JH |
3845 | SV *sv; |
3846 | AV *av; | |
3847 | IV ix; | |
3848 | IV inc; | |
3849 | ||
4ebe6e95 | 3850 | cx = CX_CUR(); |
1d7c1841 | 3851 | itersvp = CxITERVAR(cx); |
4b5c941e | 3852 | assert(itersvp); |
a48ce6be DM |
3853 | |
3854 | switch (CxTYPE(cx)) { | |
17c91640 | 3855 | |
b552b52c DM |
3856 | case CXt_LOOP_LAZYSV: /* string increment */ |
3857 | { | |
3858 | SV* cur = cx->blk_loop.state_u.lazysv.cur; | |
3859 | SV *end = cx->blk_loop.state_u.lazysv.end; | |
3860 | /* If the maximum is !SvOK(), pp_enteriter substitutes PL_sv_no. | |
3861 | It has SvPVX of "" and SvCUR of 0, which is what we want. */ | |
3862 | STRLEN maxlen = 0; | |
3863 | const char *max = SvPV_const(end, maxlen); | |
d6c970c7 AC |
3864 | if (DO_UTF8(end) && IN_UNI_8_BIT) |
3865 | maxlen = sv_len_utf8_nomg(end); | |
5d9574c1 | 3866 | if (UNLIKELY(SvNIOK(cur) || SvCUR(cur) > maxlen)) |
8a1f10dd | 3867 | goto retno; |
b552b52c DM |
3868 | |
3869 | oldsv = *itersvp; | |
6d3ca00e DM |
3870 | /* NB: on the first iteration, oldsv will have a ref count of at |
3871 | * least 2 (one extra from blk_loop.itersave), so the GV or pad | |
3872 | * slot will get localised; on subsequent iterations the RC==1 | |
3873 | * optimisation may kick in and the SV will be reused. */ | |
3874 | if (oldsv && LIKELY(SvREFCNT(oldsv) == 1 && !SvMAGICAL(oldsv))) { | |
b552b52c DM |
3875 | /* safe to reuse old SV */ |
3876 | sv_setsv(oldsv, cur); | |
a48ce6be | 3877 | } |
b552b52c DM |
3878 | else |
3879 | { | |
3880 | /* we need a fresh SV every time so that loop body sees a | |
3881 | * completely new SV for closures/references to work as | |
3882 | * they used to */ | |
3883 | *itersvp = newSVsv(cur); | |
6d3ca00e | 3884 | SvREFCNT_dec(oldsv); |
b552b52c DM |
3885 | } |
3886 | if (strEQ(SvPVX_const(cur), max)) | |
3887 | sv_setiv(cur, 0); /* terminate next time */ | |
3888 | else | |
3889 | sv_inc(cur); | |
3890 | break; | |
3891 | } | |
a48ce6be | 3892 | |
fcef60b4 DM |
3893 | case CXt_LOOP_LAZYIV: /* integer increment */ |
3894 | { | |
3895 | IV cur = cx->blk_loop.state_u.lazyiv.cur; | |
5d9574c1 | 3896 | if (UNLIKELY(cur > cx->blk_loop.state_u.lazyiv.end)) |
8a1f10dd | 3897 | goto retno; |
7f61b687 | 3898 | |
fcef60b4 | 3899 | oldsv = *itersvp; |
6d3ca00e DM |
3900 | /* see NB comment above */ |
3901 | if (oldsv && LIKELY(SvREFCNT(oldsv) == 1 && !SvMAGICAL(oldsv))) { | |
eaa5c2d6 | 3902 | /* safe to reuse old SV */ |
47b96a1e DM |
3903 | |
3904 | if ( (SvFLAGS(oldsv) & (SVTYPEMASK|SVf_THINKFIRST|SVf_IVisUV)) | |
3905 | == SVt_IV) | |
3906 | { | |
3907 | /* Cheap SvIOK_only(). | |
3908 | * Assert that flags which SvIOK_only() would test or | |
3909 | * clear can't be set, because we're SVt_IV */ | |
3910 | assert(!(SvFLAGS(oldsv) & | |
3911 | (SVf_OOK|SVf_UTF8|(SVf_OK & ~(SVf_IOK|SVp_IOK))))); | |
3912 | SvFLAGS(oldsv) |= (SVf_IOK|SVp_IOK); | |
3913 | /* SvIV_set() where sv_any points to head */ | |
3914 | oldsv->sv_u.svu_iv = cur; | |
3915 | ||
3916 | } | |
3917 | else | |
3918 | sv_setiv(oldsv, cur); | |
eaa5c2d6 | 3919 | } |
1c846c1f | 3920 | else |
eaa5c2d6 GA |
3921 | { |
3922 | /* we need a fresh SV every time so that loop body sees a | |
3923 | * completely new SV for closures/references to work as they | |
3924 | * used to */ | |
fcef60b4 | 3925 | *itersvp = newSViv(cur); |
6d3ca00e | 3926 | SvREFCNT_dec(oldsv); |
eaa5c2d6 | 3927 | } |
a2309040 | 3928 | |
5d9574c1 | 3929 | if (UNLIKELY(cur == IV_MAX)) { |
cdc1aa42 NC |
3930 | /* Handle end of range at IV_MAX */ |
3931 | cx->blk_loop.state_u.lazyiv.end = IV_MIN; | |
3932 | } else | |
3933 | ++cx->blk_loop.state_u.lazyiv.cur; | |
a48ce6be | 3934 | break; |
fcef60b4 | 3935 | } |
a48ce6be | 3936 | |
93661e56 DM |
3937 | case CXt_LOOP_LIST: /* for (1,2,3) */ |
3938 | ||
3939 | assert(OPpITER_REVERSED == 2); /* so inc becomes -1 or 1 */ | |
d6139ec4 | 3940 | inc = (IV)1 - (IV)(PL_op->op_private & OPpITER_REVERSED); |
93661e56 DM |
3941 | ix = (cx->blk_loop.state_u.stack.ix += inc); |
3942 | if (UNLIKELY(inc > 0 | |
3943 | ? ix > cx->blk_oldsp | |
3944 | : ix <= cx->blk_loop.state_u.stack.basesp) | |
3945 | ) | |
8a1f10dd | 3946 | goto retno; |
93661e56 DM |
3947 | |
3948 | sv = PL_stack_base[ix]; | |
3949 | av = NULL; | |
3950 | goto loop_ary_common; | |
3951 | ||
3952 | case CXt_LOOP_ARY: /* for (@ary) */ | |
3953 | ||
3954 | av = cx->blk_loop.state_u.ary.ary; | |
d6139ec4 | 3955 | inc = (IV)1 - (IV)(PL_op->op_private & OPpITER_REVERSED); |
93661e56 DM |
3956 | ix = (cx->blk_loop.state_u.ary.ix += inc); |
3957 | if (UNLIKELY(inc > 0 | |
3958 | ? ix > AvFILL(av) | |
3959 | : ix < 0) | |
3960 | ) | |
8a1f10dd | 3961 | goto retno; |
de080daa | 3962 | |
9d1ee8e0 | 3963 | if (UNLIKELY(SvRMAGICAL(av))) { |
a8a20bb6 DM |
3964 | SV * const * const svp = av_fetch(av, ix, FALSE); |
3965 | sv = svp ? *svp : NULL; | |
3966 | } | |
3967 | else { | |
3968 | sv = AvARRAY(av)[ix]; | |
de080daa | 3969 | } |
ef3e5ea9 | 3970 | |
93661e56 DM |
3971 | loop_ary_common: |
3972 | ||
d39c26a6 FC |
3973 | if (UNLIKELY(cx->cx_type & CXp_FOR_LVREF)) { |
3974 | SvSetMagicSV(*itersvp, sv); | |
3975 | break; | |
3976 | } | |
3977 | ||
5d9574c1 DM |
3978 | if (LIKELY(sv)) { |
3979 | if (UNLIKELY(SvIS_FREED(sv))) { | |
f38aa882 DM |
3980 | *itersvp = NULL; |
3981 | Perl_croak(aTHX_ "Use of freed value in iteration"); | |
3982 | } | |
60779a30 | 3983 | if (SvPADTMP(sv)) { |
8e079c2a | 3984 | sv = newSVsv(sv); |
60779a30 | 3985 | } |
8e079c2a FC |
3986 | else { |
3987 | SvTEMP_off(sv); | |
3988 | SvREFCNT_inc_simple_void_NN(sv); | |
3989 | } | |
de080daa | 3990 | } |
93661e56 | 3991 | else if (av) { |
199f858d | 3992 | sv = newSVavdefelem(av, ix, 0); |
de080daa | 3993 | } |
a600f7e6 FC |
3994 | else |
3995 | sv = &PL_sv_undef; | |
a0d0e21e | 3996 | |
de080daa DM |
3997 | oldsv = *itersvp; |
3998 | *itersvp = sv; | |
3999 | SvREFCNT_dec(oldsv); | |
de080daa | 4000 | break; |
a48ce6be DM |
4001 | |
4002 | default: | |
4003 | DIE(aTHX_ "panic: pp_iter, type=%u", CxTYPE(cx)); | |
4004 | } | |
8a1f10dd | 4005 | |
f75ab299 | 4006 | /* Try to bypass pushing &PL_sv_yes and calling pp_and(); instead |
7c114860 DM |
4007 | * jump straight to the AND op's op_other */ |
4008 | assert(PL_op->op_next->op_type == OP_AND); | |
f75ab299 AC |
4009 | if (PL_op->op_next->op_ppaddr == Perl_pp_and) { |
4010 | return cLOGOPx(PL_op->op_next)->op_other; | |
4011 | } | |
4012 | else { | |
4013 | /* An XS module has replaced the op_ppaddr, so fall back to the slow, | |
4014 | * obvious way. */ | |
4015 | /* pp_enteriter should have pre-extended the stack */ | |
4016 | EXTEND_SKIP(PL_stack_sp, 1); | |
4017 | *++PL_stack_sp = &PL_sv_yes; | |
4018 | return PL_op->op_next; | |
4019 | } | |
7c114860 DM |
4020 | |
4021 | retno: | |
f75ab299 | 4022 | /* Try to bypass pushing &PL_sv_no and calling pp_and(); instead |
7c114860 DM |
4023 | * jump straight to the AND op's op_next */ |
4024 | assert(PL_op->op_next->op_type == OP_AND); | |
8a1f10dd | 4025 | /* pp_enteriter should have pre-extended the stack */ |
87058c31 | 4026 | EXTEND_SKIP(PL_stack_sp, 1); |
7c114860 DM |
4027 | /* we only need this for the rare case where the OP_AND isn't |
4028 | * in void context, e.g. $x = do { for (..) {...} }; | |
f75ab299 AC |
4029 | * (or for when an XS module has replaced the op_ppaddr) |
4030 | * but it's cheaper to just push it rather than testing first | |
7c114860 DM |
4031 | */ |
4032 | *++PL_stack_sp = &PL_sv_no; | |
f75ab299 AC |
4033 | if (PL_op->op_next->op_ppaddr == Perl_pp_and) { |
4034 | return PL_op->op_next->op_next; | |
4035 | } | |
4036 | else { | |
4037 | /* An XS module has replaced the op_ppaddr, so fall back to the slow, | |
4038 | * obvious way. */ | |
4039 | return PL_op->op_next; | |
4040 | } | |
a0d0e21e LW |
4041 | } |
4042 | ||
7c114860 | 4043 | |
ef07e810 DM |
4044 | /* |
4045 | A description of how taint works in pattern matching and substitution. | |
4046 | ||
284167a5 S |
4047 | This is all conditional on NO_TAINT_SUPPORT not being defined. Under |
4048 | NO_TAINT_SUPPORT, taint-related operations should become no-ops. | |
4049 | ||
4e19c54b | 4050 | While the pattern is being assembled/concatenated and then compiled, |
284167a5 S |
4051 | PL_tainted will get set (via TAINT_set) if any component of the pattern |
4052 | is tainted, e.g. /.*$tainted/. At the end of pattern compilation, | |
4053 | the RXf_TAINTED flag is set on the pattern if PL_tainted is set (via | |
1738e041 DM |
4054 | TAINT_get). It will also be set if any component of the pattern matches |
4055 | based on locale-dependent behavior. | |
ef07e810 | 4056 | |
0ab462a6 DM |
4057 | When the pattern is copied, e.g. $r = qr/..../, the SV holding the ref to |
4058 | the pattern is marked as tainted. This means that subsequent usage, such | |
284167a5 S |
4059 | as /x$r/, will set PL_tainted using TAINT_set, and thus RXf_TAINTED, |
4060 | on the new pattern too. | |
ef07e810 | 4061 | |
272d35c9 | 4062 | RXf_TAINTED_SEEN is used post-execution by the get magic code |
ef07e810 DM |
4063 | of $1 et al to indicate whether the returned value should be tainted. |
4064 | It is the responsibility of the caller of the pattern (i.e. pp_match, | |
4065 | pp_subst etc) to set this flag for any other circumstances where $1 needs | |
4066 | to be tainted. | |
4067 | ||
4068 | The taint behaviour of pp_subst (and pp_substcont) is quite complex. | |
4069 | ||
4070 | There are three possible sources of taint | |
4071 | * the source string | |
4072 | * the pattern (both compile- and run-time, RXf_TAINTED / RXf_TAINTED_SEEN) | |
4073 | * the replacement string (or expression under /e) | |
4074 | ||
4075 | There are four destinations of taint and they are affected by the sources | |
4076 | according to the rules below: | |
4077 | ||
4078 | * the return value (not including /r): | |
4079 | tainted by the source string and pattern, but only for the | |
4080 | number-of-iterations case; boolean returns aren't tainted; | |
4081 | * the modified string (or modified copy under /r): | |
4082 | tainted by the source string, pattern, and replacement strings; | |
4083 | * $1 et al: | |
4084 | tainted by the pattern, and under 'use re "taint"', by the source | |
4085 | string too; | |
4086 | * PL_taint - i.e. whether subsequent code (e.g. in a /e block) is tainted: | |
4087 | should always be unset before executing subsequent code. | |
4088 | ||
4089 | The overall action of pp_subst is: | |
4090 | ||
4091 | * at the start, set bits in rxtainted indicating the taint status of | |
4092 | the various sources. | |
4093 | ||
4094 | * After each pattern execution, update the SUBST_TAINT_PAT bit in | |
4095 | rxtainted if RXf_TAINTED_SEEN has been set, to indicate that the | |
4096 | pattern has subsequently become tainted via locale ops. | |
4097 | ||
4098 | * If control is being passed to pp_substcont to execute a /e block, | |
4099 | save rxtainted in the CXt_SUBST block, for future use by | |
4100 | pp_substcont. | |
4101 | ||
4102 | * Whenever control is being returned to perl code (either by falling | |
4103 | off the "end" of pp_subst/pp_substcont, or by entering a /e block), | |
4104 | use the flag bits in rxtainted to make all the appropriate types of | |
0ab462a6 DM |
4105 | destination taint visible; e.g. set RXf_TAINTED_SEEN so that $1 |
4106 | et al will appear tainted. | |
ef07e810 DM |
4107 | |
4108 | pp_match is just a simpler version of the above. | |
4109 | ||
4110 | */ | |
4111 | ||
a0d0e21e LW |
4112 | PP(pp_subst) |
4113 | { | |
20b7effb | 4114 | dSP; dTARG; |
eb578fdb | 4115 | PMOP *pm = cPMOP; |
a0d0e21e | 4116 | PMOP *rpm = pm; |
eb578fdb | 4117 | char *s; |
a0d0e21e | 4118 | char *strend; |
5c144d81 | 4119 | const char *c; |
a0d0e21e | 4120 | STRLEN clen; |
3c6ef0a5 FC |
4121 | SSize_t iters = 0; |
4122 | SSize_t maxiters; | |
a0d0e21e | 4123 | bool once; |
ef07e810 DM |
4124 | U8 rxtainted = 0; /* holds various SUBST_TAINT_* flag bits. |
4125 | See "how taint works" above */ | |
a0d0e21e | 4126 | char *orig; |
1ed74d04 | 4127 | U8 r_flags; |
eb578fdb | 4128 | REGEXP *rx = PM_GETRE(pm); |
196a02af | 4129 | regexp *prog = ReANY(rx); |
a0d0e21e LW |
4130 | STRLEN len; |
4131 | int force_on_match = 0; | |
0bcc34c2 | 4132 | const I32 oldsave = PL_savestack_ix; |
792b2c16 | 4133 | STRLEN slen; |
26a74523 | 4134 | bool doutf8 = FALSE; /* whether replacement is in utf8 */ |
db2c6cb3 | 4135 | #ifdef PERL_ANY_COW |
106d9a13 | 4136 | bool was_cow; |
ed252734 | 4137 | #endif |
a0714e2c | 4138 | SV *nsv = NULL; |
b770e143 | 4139 | /* known replacement string? */ |
eb578fdb | 4140 | SV *dstr = (pm->op_pmflags & PMf_CONST) ? POPs : NULL; |
a0d0e21e | 4141 | |
f410a211 NC |
4142 | PERL_ASYNC_CHECK(); |
4143 | ||
533c011a | 4144 | if (PL_op->op_flags & OPf_STACKED) |
a0d0e21e LW |
4145 | TARG = POPs; |
4146 | else { | |
9399c607 DM |
4147 | if (ARGTARG) |
4148 | GETTARGET; | |
4149 | else { | |
4150 | TARG = DEFSV; | |
4151 | } | |
a0d0e21e | 4152 | EXTEND(SP,1); |
1c846c1f | 4153 | } |
d9f424b2 | 4154 | |
64534138 | 4155 | SvGETMAGIC(TARG); /* must come before cow check */ |
db2c6cb3 | 4156 | #ifdef PERL_ANY_COW |
106d9a13 DM |
4157 | /* note that a string might get converted to COW during matching */ |
4158 | was_cow = cBOOL(SvIsCOW(TARG)); | |
ed252734 | 4159 | #endif |
d13a5d3b TC |
4160 | if (!(rpm->op_pmflags & PMf_NONDESTRUCT)) { |
4161 | #ifndef PERL_ANY_COW | |
4162 | if (SvIsCOW(TARG)) | |
4163 | sv_force_normal_flags(TARG,0); | |
4164 | #endif | |
4165 | if ((SvREADONLY(TARG) | |
4166 | || ( ((SvTYPE(TARG) == SVt_PVGV && isGV_with_GP(TARG)) | |
4167 | || SvTYPE(TARG) > SVt_PVLV) | |
4168 | && !(SvTYPE(TARG) == SVt_PVGV && SvFAKE(TARG))))) | |
4169 | Perl_croak_no_modify(); | |
4170 | } | |
8ec5e241 NIS |
4171 | PUTBACK; |
4172 | ||
6ac6605d DM |
4173 | orig = SvPV_nomg(TARG, len); |
4174 | /* note we don't (yet) force the var into being a string; if we fail | |
92711104 | 4175 | * to match, we leave as-is; on successful match however, we *will* |
6ac6605d | 4176 | * coerce into a string, then repeat the match */ |
4499db73 | 4177 | if (!SvPOKp(TARG) || SvTYPE(TARG) == SVt_PVGV || SvVOK(TARG)) |
a0d0e21e | 4178 | force_on_match = 1; |
20be6587 DM |
4179 | |
4180 | /* only replace once? */ | |
4181 | once = !(rpm->op_pmflags & PMf_GLOBAL); | |
4182 | ||
ef07e810 | 4183 | /* See "how taint works" above */ |
284167a5 | 4184 | if (TAINTING_get) { |
20be6587 DM |
4185 | rxtainted = ( |
4186 | (SvTAINTED(TARG) ? SUBST_TAINT_STR : 0) | |
196a02af | 4187 | | (RXp_ISTAINTED(prog) ? SUBST_TAINT_PAT : 0) |
20be6587 | 4188 | | ((pm->op_pmflags & PMf_RETAINT) ? SUBST_TAINT_RETAINT : 0) |
5e501dc5 DM |
4189 | | (( (once && !(rpm->op_pmflags & PMf_NONDESTRUCT)) |
4190 | || (PL_op->op_private & OPpTRUEBOOL)) ? SUBST_TAINT_BOOLRET : 0)); | |
20be6587 DM |
4191 | TAINT_NOT; |
4192 | } | |
a12c0f56 | 4193 | |
a0d0e21e | 4194 | force_it: |
6ac6605d DM |
4195 | if (!pm || !orig) |
4196 | DIE(aTHX_ "panic: pp_subst, pm=%p, orig=%p", pm, orig); | |
a0d0e21e | 4197 | |
6ac6605d DM |
4198 | strend = orig + len; |
4199 | slen = DO_UTF8(TARG) ? utf8_length((U8*)orig, (U8*)strend) : len; | |
792b2c16 JH |
4200 | maxiters = 2 * slen + 10; /* We can match twice at each |
4201 | position, once with zero-length, | |
4202 | second time with non-zero. */ | |
a0d0e21e | 4203 | |
794826f4 | 4204 | /* handle the empty pattern */ |
196a02af | 4205 | if (!RX_PRELEN(rx) && PL_curpm && !prog->mother_re) { |
5585e758 YO |
4206 | if (PL_curpm == PL_reg_curpm) { |
4207 | if (PL_curpm_under) { | |
4208 | if (PL_curpm_under == PL_reg_curpm) { | |
4209 | Perl_croak(aTHX_ "Infinite recursion via empty pattern"); | |
4210 | } else { | |
4211 | pm = PL_curpm_under; | |
4212 | } | |
4213 | } | |
4214 | } else { | |
4215 | pm = PL_curpm; | |
4216 | } | |
4217 | rx = PM_GETRE(pm); | |
196a02af | 4218 | prog = ReANY(rx); |
a0d0e21e | 4219 | } |
6502e081 | 4220 | |
6e240d0b | 4221 | #ifdef PERL_SAWAMPERSAND |
196a02af | 4222 | r_flags = ( RXp_NPARENS(prog) |
6502e081 | 4223 | || PL_sawampersand |
196a02af | 4224 | || (RXp_EXTFLAGS(prog) & (RXf_EVAL_SEEN|RXf_PMf_KEEPCOPY)) |
5b0e71e9 | 4225 | || (rpm->op_pmflags & PMf_KEEPCOPY) |
6502e081 DM |
4226 | ) |
4227 | ? REXEC_COPY_STR | |
4228 | : 0; | |
6e240d0b FC |
4229 | #else |
4230 | r_flags = REXEC_COPY_STR; | |
4231 | #endif | |
7fba1cd6 | 4232 | |
0395280b | 4233 | if (!CALLREGEXEC(rx, orig, strend, orig, 0, TARG, NULL, r_flags)) |
8b64c330 | 4234 | { |
5e79dfb9 DM |
4235 | SPAGAIN; |
4236 | PUSHs(rpm->op_pmflags & PMf_NONDESTRUCT ? TARG : &PL_sv_no); | |
4237 | LEAVE_SCOPE(oldsave); | |
4238 | RETURN; | |
4239 | } | |
1754320d FC |
4240 | PL_curpm = pm; |
4241 | ||
71be2cbc | 4242 | /* known replacement string? */ |
f272994b | 4243 | if (dstr) { |
8514a05a JH |
4244 | /* replacement needing upgrading? */ |
4245 | if (DO_UTF8(TARG) && !doutf8) { | |
db79b45b | 4246 | nsv = sv_newmortal(); |
4a176938 | 4247 | SvSetSV(nsv, dstr); |
8df0e7a2 | 4248 | sv_utf8_upgrade(nsv); |
5c144d81 | 4249 | c = SvPV_const(nsv, clen); |
4a176938 JH |
4250 | doutf8 = TRUE; |
4251 | } | |
4252 | else { | |
5c144d81 | 4253 | c = SvPV_const(dstr, clen); |
4a176938 | 4254 | doutf8 = DO_UTF8(dstr); |
8514a05a | 4255 | } |
bb933b9b | 4256 | |
c4f4b223 | 4257 | if (UNLIKELY(TAINT_get)) |
bb933b9b | 4258 | rxtainted |= SUBST_TAINT_REPL; |
f272994b A |
4259 | } |
4260 | else { | |
6136c704 | 4261 | c = NULL; |
f272994b A |
4262 | doutf8 = FALSE; |
4263 | } | |
4264 | ||
71be2cbc | 4265 | /* can do inplace substitution? */ |
ed252734 | 4266 | if (c |
db2c6cb3 | 4267 | #ifdef PERL_ANY_COW |
106d9a13 | 4268 | && !was_cow |
ed252734 | 4269 | #endif |
196a02af | 4270 | && (I32)clen <= RXp_MINLENRET(prog) |
9cefd268 FC |
4271 | && ( once |
4272 | || !(r_flags & REXEC_COPY_STR) | |
196a02af | 4273 | || (!SvGMAGICAL(dstr) && !(RXp_EXTFLAGS(prog) & RXf_EVAL_SEEN)) |
9cefd268 | 4274 | ) |
196a02af | 4275 | && !(RXp_EXTFLAGS(prog) & RXf_NO_INPLACE_SUBST) |
8ca8a454 NC |
4276 | && (!doutf8 || SvUTF8(TARG)) |
4277 | && !(rpm->op_pmflags & PMf_NONDESTRUCT)) | |
8b030b38 | 4278 | { |
ec911639 | 4279 | |
db2c6cb3 | 4280 | #ifdef PERL_ANY_COW |
106d9a13 | 4281 | /* string might have got converted to COW since we set was_cow */ |
ed252734 | 4282 | if (SvIsCOW(TARG)) { |
f7a8268c | 4283 | if (!force_on_match) |
ed252734 | 4284 | goto have_a_cow; |
f7a8268c | 4285 | assert(SvVOK(TARG)); |
ed252734 NC |
4286 | } |
4287 | #endif | |
71be2cbc | 4288 | if (force_on_match) { |
6ac6605d DM |
4289 | /* redo the first match, this time with the orig var |
4290 | * forced into being a string */ | |
71be2cbc | 4291 | force_on_match = 0; |
6ac6605d | 4292 | orig = SvPV_force_nomg(TARG, len); |
71be2cbc | 4293 | goto force_it; |
4294 | } | |
39b40493 | 4295 | |
71be2cbc | 4296 | if (once) { |
c67ab8f2 | 4297 | char *d, *m; |
196a02af | 4298 | if (RXp_MATCH_TAINTED(prog)) /* run time pattern taint, eg locale */ |
20be6587 | 4299 | rxtainted |= SUBST_TAINT_PAT; |
196a02af DM |
4300 | m = orig + RXp_OFFS(prog)[0].start; |
4301 | d = orig + RXp_OFFS(prog)[0].end; | |
71be2cbc | 4302 | s = orig; |
4303 | if (m - s > strend - d) { /* faster to shorten from end */ | |
2ec7214c | 4304 | I32 i; |
71be2cbc | 4305 | if (clen) { |
4306 | Copy(c, m, clen, char); | |
4307 | m += clen; | |
a0d0e21e | 4308 | } |
71be2cbc | 4309 | i = strend - d; |
4310 | if (i > 0) { | |
4311 | Move(d, m, i, char); | |
4312 | m += i; | |
a0d0e21e | 4313 | } |
71be2cbc | 4314 | *m = '\0'; |
4315 | SvCUR_set(TARG, m - s); | |
4316 | } | |
2ec7214c DM |
4317 | else { /* faster from front */ |
4318 | I32 i = m - s; | |
71be2cbc | 4319 | d -= clen; |
2ec7214c DM |
4320 | if (i > 0) |
4321 | Move(s, d - i, i, char); | |
71be2cbc | 4322 | sv_chop(TARG, d-i); |
71be2cbc | 4323 | if (clen) |
c947cd8d | 4324 | Copy(c, d, clen, char); |
71be2cbc | 4325 | } |
8ec5e241 | 4326 | SPAGAIN; |
8ca8a454 | 4327 | PUSHs(&PL_sv_yes); |
71be2cbc | 4328 | } |
4329 | else { | |
c67ab8f2 | 4330 | char *d, *m; |
196a02af | 4331 | d = s = RXp_OFFS(prog)[0].start + orig; |
71be2cbc | 4332 | do { |
2b25edcf | 4333 | I32 i; |
5d9574c1 | 4334 | if (UNLIKELY(iters++ > maxiters)) |
cea2e8a9 | 4335 | DIE(aTHX_ "Substitution loop"); |
196a02af DM |
4336 | /* run time pattern taint, eg locale */ |
4337 | if (UNLIKELY(RXp_MATCH_TAINTED(prog))) | |
20be6587 | 4338 | rxtainted |= SUBST_TAINT_PAT; |
196a02af | 4339 | m = RXp_OFFS(prog)[0].start + orig; |
155aba94 | 4340 | if ((i = m - s)) { |
71be2cbc | 4341 | if (s != d) |
4342 | Move(s, d, i, char); | |
4343 | d += i; | |
a0d0e21e | 4344 | } |
71be2cbc | 4345 | if (clen) { |
4346 | Copy(c, d, clen, char); | |
4347 | d += clen; | |
4348 | } | |
196a02af | 4349 | s = RXp_OFFS(prog)[0].end + orig; |
7ce41e5c FC |
4350 | } while (CALLREGEXEC(rx, s, strend, orig, |
4351 | s == m, /* don't match same null twice */ | |
f722798b | 4352 | TARG, NULL, |
d5e7783a | 4353 | REXEC_NOT_FIRST|REXEC_IGNOREPOS|REXEC_FAIL_ON_UNDERFLOW)); |
71be2cbc | 4354 | if (s != d) { |
2b25edcf | 4355 | I32 i = strend - s; |
aa07b2f6 | 4356 | SvCUR_set(TARG, d - SvPVX_const(TARG) + i); |
71be2cbc | 4357 | Move(s, d, i+1, char); /* include the NUL */ |
a0d0e21e | 4358 | } |
8ec5e241 | 4359 | SPAGAIN; |
04d59685 | 4360 | assert(iters); |
7b394f12 | 4361 | if (PL_op->op_private & OPpTRUEBOOL) |
04d59685 | 4362 | PUSHs(&PL_sv_yes); |
7b394f12 DM |
4363 | else |
4364 | mPUSHi(iters); | |
a0d0e21e LW |
4365 | } |
4366 | } | |
ff6e92e8 | 4367 | else { |
1754320d | 4368 | bool first; |
c67ab8f2 | 4369 | char *m; |
1754320d | 4370 | SV *repl; |
a0d0e21e | 4371 | if (force_on_match) { |
6ac6605d DM |
4372 | /* redo the first match, this time with the orig var |
4373 | * forced into being a string */ | |
a0d0e21e | 4374 | force_on_match = 0; |
0c1438a1 NC |
4375 | if (rpm->op_pmflags & PMf_NONDESTRUCT) { |
4376 | /* I feel that it should be possible to avoid this mortal copy | |
4377 | given that the code below copies into a new destination. | |
4378 | However, I suspect it isn't worth the complexity of | |
4379 | unravelling the C<goto force_it> for the small number of | |
4380 | cases where it would be viable to drop into the copy code. */ | |
4381 | TARG = sv_2mortal(newSVsv(TARG)); | |
4382 | } | |
6ac6605d | 4383 | orig = SvPV_force_nomg(TARG, len); |
a0d0e21e LW |
4384 | goto force_it; |
4385 | } | |
db2c6cb3 | 4386 | #ifdef PERL_ANY_COW |
ed252734 NC |
4387 | have_a_cow: |
4388 | #endif | |
196a02af | 4389 | if (RXp_MATCH_TAINTED(prog)) /* run time pattern taint, eg locale */ |
20be6587 | 4390 | rxtainted |= SUBST_TAINT_PAT; |
1754320d | 4391 | repl = dstr; |
196a02af | 4392 | s = RXp_OFFS(prog)[0].start + orig; |
0395280b DM |
4393 | dstr = newSVpvn_flags(orig, s-orig, |
4394 | SVs_TEMP | (DO_UTF8(TARG) ? SVf_UTF8 : 0)); | |
a0d0e21e | 4395 | if (!c) { |
eb578fdb | 4396 | PERL_CONTEXT *cx; |
8ec5e241 | 4397 | SPAGAIN; |
0395280b | 4398 | m = orig; |
20be6587 DM |
4399 | /* note that a whole bunch of local vars are saved here for |
4400 | * use by pp_substcont: here's a list of them in case you're | |
4401 | * searching for places in this sub that uses a particular var: | |
4402 | * iters maxiters r_flags oldsave rxtainted orig dstr targ | |
4403 | * s m strend rx once */ | |
490576d1 | 4404 | CX_PUSHSUBST(cx); |
20e98b0f | 4405 | RETURNOP(cPMOP->op_pmreplrootu.op_pmreplroot); |
a0d0e21e | 4406 | } |
1754320d | 4407 | first = TRUE; |
a0d0e21e | 4408 | do { |
5d9574c1 | 4409 | if (UNLIKELY(iters++ > maxiters)) |
cea2e8a9 | 4410 | DIE(aTHX_ "Substitution loop"); |
196a02af | 4411 | if (UNLIKELY(RXp_MATCH_TAINTED(prog))) |
20be6587 | 4412 | rxtainted |= SUBST_TAINT_PAT; |
196a02af | 4413 | if (RXp_MATCH_COPIED(prog) && RXp_SUBBEG(prog) != orig) { |
c67ab8f2 DM |
4414 | char *old_s = s; |
4415 | char *old_orig = orig; | |
196a02af | 4416 | assert(RXp_SUBOFFSET(prog) == 0); |
c67ab8f2 | 4417 | |
196a02af | 4418 | orig = RXp_SUBBEG(prog); |
c67ab8f2 DM |
4419 | s = orig + (old_s - old_orig); |
4420 | strend = s + (strend - old_s); | |
a0d0e21e | 4421 | } |
196a02af | 4422 | m = RXp_OFFS(prog)[0].start + orig; |
64534138 | 4423 | sv_catpvn_nomg_maybeutf8(dstr, s, m - s, DO_UTF8(TARG)); |
196a02af | 4424 | s = RXp_OFFS(prog)[0].end + orig; |
1754320d FC |
4425 | if (first) { |
4426 | /* replacement already stringified */ | |
4427 | if (clen) | |
64534138 | 4428 | sv_catpvn_nomg_maybeutf8(dstr, c, clen, doutf8); |
1754320d FC |
4429 | first = FALSE; |
4430 | } | |
4431 | else { | |
8df0e7a2 | 4432 | sv_catsv(dstr, repl); |
1754320d | 4433 | } |
a0d0e21e LW |
4434 | if (once) |
4435 | break; | |
ff27773b KW |
4436 | } while (CALLREGEXEC(rx, s, strend, orig, |
4437 | s == m, /* Yields minend of 0 or 1 */ | |
d5e7783a DM |
4438 | TARG, NULL, |
4439 | REXEC_NOT_FIRST|REXEC_IGNOREPOS|REXEC_FAIL_ON_UNDERFLOW)); | |
aba224f7 | 4440 | assert(strend >= s); |
64534138 | 4441 | sv_catpvn_nomg_maybeutf8(dstr, s, strend - s, DO_UTF8(TARG)); |
748a9306 | 4442 | |
8ca8a454 NC |
4443 | if (rpm->op_pmflags & PMf_NONDESTRUCT) { |
4444 | /* From here on down we're using the copy, and leaving the original | |
4445 | untouched. */ | |
4446 | TARG = dstr; | |
4447 | SPAGAIN; | |
4448 | PUSHs(dstr); | |
4449 | } else { | |
db2c6cb3 | 4450 | #ifdef PERL_ANY_COW |
8ca8a454 NC |
4451 | /* The match may make the string COW. If so, brilliant, because |
4452 | that's just saved us one malloc, copy and free - the regexp has | |
4453 | donated the old buffer, and we malloc an entirely new one, rather | |
4454 | than the regexp malloc()ing a buffer and copying our original, | |
4455 | only for us to throw it away here during the substitution. */ | |
4456 | if (SvIsCOW(TARG)) { | |
4457 | sv_force_normal_flags(TARG, SV_COW_DROP_PV); | |
4458 | } else | |
ed252734 | 4459 | #endif |
8ca8a454 NC |
4460 | { |
4461 | SvPV_free(TARG); | |
4462 | } | |
4463 | SvPV_set(TARG, SvPVX(dstr)); | |
4464 | SvCUR_set(TARG, SvCUR(dstr)); | |
4465 | SvLEN_set(TARG, SvLEN(dstr)); | |
64534138 | 4466 | SvFLAGS(TARG) |= SvUTF8(dstr); |
8ca8a454 | 4467 | SvPV_set(dstr, NULL); |
748a9306 | 4468 | |
8ca8a454 | 4469 | SPAGAIN; |
c352ee5f | 4470 | if (PL_op->op_private & OPpTRUEBOOL) |
04d59685 | 4471 | PUSHs(&PL_sv_yes); |
c352ee5f DM |
4472 | else |
4473 | mPUSHi(iters); | |
8ca8a454 NC |
4474 | } |
4475 | } | |
4476 | ||
4477 | if (!(rpm->op_pmflags & PMf_NONDESTRUCT)) { | |
4478 | (void)SvPOK_only_UTF8(TARG); | |
a0d0e21e | 4479 | } |
20be6587 | 4480 | |
ef07e810 | 4481 | /* See "how taint works" above */ |
284167a5 | 4482 | if (TAINTING_get) { |
20be6587 DM |
4483 | if ((rxtainted & SUBST_TAINT_PAT) || |
4484 | ((rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_RETAINT)) == | |
4485 | (SUBST_TAINT_STR|SUBST_TAINT_RETAINT)) | |
4486 | ) | |
196a02af | 4487 | (RXp_MATCH_TAINTED_on(prog)); /* taint $1 et al */ |
20be6587 DM |
4488 | |
4489 | if (!(rxtainted & SUBST_TAINT_BOOLRET) | |
4490 | && (rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_PAT)) | |
4491 | ) | |
4492 | SvTAINTED_on(TOPs); /* taint return value */ | |
4493 | else | |
4494 | SvTAINTED_off(TOPs); /* may have got tainted earlier */ | |
4495 | ||
4496 | /* needed for mg_set below */ | |
284167a5 S |
4497 | TAINT_set( |
4498 | cBOOL(rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_PAT|SUBST_TAINT_REPL)) | |
4499 | ); | |
20be6587 DM |
4500 | SvTAINT(TARG); |
4501 | } | |
4502 | SvSETMAGIC(TARG); /* PL_tainted must be correctly set for this mg_set */ | |
4503 | TAINT_NOT; | |
f1a76097 DM |
4504 | LEAVE_SCOPE(oldsave); |
4505 | RETURN; | |
a0d0e21e LW |
4506 | } |
4507 | ||
4508 | PP(pp_grepwhile) | |
4509 | { | |
20b7effb | 4510 | dSP; |
f4c975aa | 4511 | dPOPss; |
a0d0e21e | 4512 | |
f4c975aa | 4513 | if (SvTRUE_NN(sv)) |
3280af22 NIS |
4514 | PL_stack_base[PL_markstack_ptr[-1]++] = PL_stack_base[*PL_markstack_ptr]; |
4515 | ++*PL_markstack_ptr; | |
b2a2a901 | 4516 | FREETMPS; |
d343c3ef | 4517 | LEAVE_with_name("grep_item"); /* exit inner scope */ |
a0d0e21e LW |
4518 | |
4519 | /* All done yet? */ | |
5d9574c1 | 4520 | if (UNLIKELY(PL_stack_base + *PL_markstack_ptr > SP)) { |
a0d0e21e | 4521 | I32 items; |
1c23e2bd | 4522 | const U8 gimme = GIMME_V; |
a0d0e21e | 4523 | |
d343c3ef | 4524 | LEAVE_with_name("grep"); /* exit outer scope */ |
a0d0e21e | 4525 | (void)POPMARK; /* pop src */ |
3280af22 | 4526 | items = --*PL_markstack_ptr - PL_markstack_ptr[-1]; |
a0d0e21e | 4527 | (void)POPMARK; /* pop dst */ |
3280af22 | 4528 | SP = PL_stack_base + POPMARK; /* pop original mark */ |
54310121 | 4529 | if (gimme == G_SCALAR) { |
7b394f12 | 4530 | if (PL_op->op_private & OPpTRUEBOOL) |
e3ad3bbc | 4531 | PUSHs(items ? &PL_sv_yes : &PL_sv_zero); |
7b394f12 | 4532 | else { |
7cc47870 | 4533 | dTARGET; |
e3ad3bbc | 4534 | PUSHi(items); |
7b394f12 | 4535 | } |
a0d0e21e | 4536 | } |
54310121 | 4537 | else if (gimme == G_ARRAY) |
4538 | SP += items; | |
a0d0e21e LW |
4539 | RETURN; |
4540 | } | |
4541 | else { | |
4542 | SV *src; | |
4543 | ||
d343c3ef | 4544 | ENTER_with_name("grep_item"); /* enter inner scope */ |
1d7c1841 | 4545 | SAVEVPTR(PL_curpm); |
a0d0e21e | 4546 | |
6cae08a8 | 4547 | src = PL_stack_base[TOPMARK]; |
60779a30 | 4548 | if (SvPADTMP(src)) { |
6cae08a8 | 4549 | src = PL_stack_base[TOPMARK] = sv_mortalcopy(src); |
a0ed822e FC |
4550 | PL_tmps_floor++; |
4551 | } | |
a0d0e21e | 4552 | SvTEMP_off(src); |
ffd49c98 | 4553 | DEFSV_set(src); |
a0d0e21e LW |
4554 | |
4555 | RETURNOP(cLOGOP->op_other); | |
4556 | } | |
4557 | } | |
4558 | ||
799da9d7 | 4559 | /* leave_adjust_stacks(): |
f7a874b8 | 4560 | * |
e02ce34b DM |
4561 | * Process a scope's return args (in the range from_sp+1 .. PL_stack_sp), |
4562 | * positioning them at to_sp+1 onwards, and do the equivalent of a | |
4563 | * FREEMPS and TAINT_NOT. | |
4564 | * | |
f7a874b8 DM |
4565 | * Not intended to be called in void context. |
4566 | * | |
799da9d7 DM |
4567 | * When leaving a sub, eval, do{} or other scope, the things that need |
4568 | * doing to process the return args are: | |
f7a874b8 | 4569 | * * in scalar context, only return the last arg (or PL_sv_undef if none); |
799da9d7 DM |
4570 | * * for the types of return that return copies of their args (such |
4571 | * as rvalue sub return), make a mortal copy of every return arg, | |
4572 | * except where we can optimise the copy away without it being | |
4573 | * semantically visible; | |
4574 | * * make sure that the arg isn't prematurely freed; in the case of an | |
4575 | * arg not copied, this may involve mortalising it. For example, in | |
f7a874b8 DM |
4576 | * C<sub f { my $x = ...; $x }>, $x would be freed when we do |
4577 | * CX_LEAVE_SCOPE(cx) unless it's protected or copied. | |
4578 | * | |
799da9d7 DM |
4579 | * What condition to use when deciding whether to pass the arg through |
4580 | * or make a copy, is determined by the 'pass' arg; its valid values are: | |
4581 | * 0: rvalue sub/eval exit | |
4582 | * 1: other rvalue scope exit | |
4583 | * 2: :lvalue sub exit in rvalue context | |
4584 | * 3: :lvalue sub exit in lvalue context and other lvalue scope exits | |
4585 | * | |
f7a874b8 | 4586 | * There is a big issue with doing a FREETMPS. We would like to free any |
799da9d7 | 4587 | * temps created by the last statement which the sub executed, rather than |
f7a874b8 DM |
4588 | * leaving them for the caller. In a situation where a sub call isn't |
4589 | * soon followed by a nextstate (e.g. nested recursive calls, a la | |
4590 | * fibonacci()), temps can accumulate, causing memory and performance | |
4591 | * issues. | |
4592 | * | |
4593 | * On the other hand, we don't want to free any TEMPs which are keeping | |
799da9d7 DM |
4594 | * alive any return args that we skipped copying; nor do we wish to undo |
4595 | * any mortalising done here. | |
f7a874b8 DM |
4596 | * |
4597 | * The solution is to split the temps stack frame into two, with a cut | |
4598 | * point delineating the two halves. We arrange that by the end of this | |
4599 | * function, all the temps stack frame entries we wish to keep are in the | |
799da9d7 | 4600 | * range PL_tmps_floor+1.. tmps_base-1, while the ones to free now are in |
f7a874b8 DM |
4601 | * the range tmps_base .. PL_tmps_ix. During the course of this |
4602 | * function, tmps_base starts off as PL_tmps_floor+1, then increases | |
4603 | * whenever we find or create a temp that we know should be kept. In | |
4604 | * general the stuff above tmps_base is undecided until we reach the end, | |
4605 | * and we may need a sort stage for that. | |
4606 | * | |
4607 | * To determine whether a TEMP is keeping a return arg alive, every | |
4608 | * arg that is kept rather than copied and which has the SvTEMP flag | |
4609 | * set, has the flag temporarily unset, to mark it. At the end we scan | |
799da9d7 | 4610 | * the temps stack frame above the cut for entries without SvTEMP and |
f7a874b8 | 4611 | * keep them, while turning SvTEMP on again. Note that if we die before |
799da9d7 | 4612 | * the SvTEMPs flags are set again, its safe: at worst, subsequent use of |
f7a874b8 DM |
4613 | * those SVs may be slightly less efficient. |
4614 | * | |
4615 | * In practice various optimisations for some common cases mean we can | |
4616 | * avoid most of the scanning and swapping about with the temps stack. | |
4617 | */ | |
4618 | ||
799da9d7 | 4619 | void |
1c23e2bd | 4620 | Perl_leave_adjust_stacks(pTHX_ SV **from_sp, SV **to_sp, U8 gimme, int pass) |
a0d0e21e | 4621 | { |
263e0548 | 4622 | dVAR; |
20b7effb | 4623 | dSP; |
f7a874b8 DM |
4624 | SSize_t tmps_base; /* lowest index into tmps stack that needs freeing now */ |
4625 | SSize_t nargs; | |
4626 | ||
799da9d7 DM |
4627 | PERL_ARGS_ASSERT_LEAVE_ADJUST_STACKS; |
4628 | ||
f7a874b8 DM |
4629 | TAINT_NOT; |
4630 | ||
4631 | if (gimme == G_ARRAY) { | |
e02ce34b DM |
4632 | nargs = SP - from_sp; |
4633 | from_sp++; | |
f7a874b8 DM |
4634 | } |
4635 | else { | |
4636 | assert(gimme == G_SCALAR); | |
e02ce34b | 4637 | if (UNLIKELY(from_sp >= SP)) { |
f7a874b8 | 4638 | /* no return args */ |
e02ce34b | 4639 | assert(from_sp == SP); |
f7a874b8 DM |
4640 | EXTEND(SP, 1); |
4641 | *++SP = &PL_sv_undef; | |
e02ce34b | 4642 | to_sp = SP; |
f7a874b8 DM |
4643 | nargs = 0; |
4644 | } | |
4645 | else { | |
4646 | from_sp = SP; | |
4647 | nargs = 1; | |
4648 | } | |
4649 | } | |
4650 | ||
4651 | /* common code for G_SCALAR and G_ARRAY */ | |
4652 | ||
4653 | tmps_base = PL_tmps_floor + 1; | |
4654 | ||
4655 | assert(nargs >= 0); | |
4656 | if (nargs) { | |
4657 | /* pointer version of tmps_base. Not safe across temp stack | |
4658 | * reallocs. */ | |
4659 | SV **tmps_basep; | |
4660 | ||
4661 | EXTEND_MORTAL(nargs); /* one big extend for worst-case scenario */ | |
4662 | tmps_basep = PL_tmps_stack + tmps_base; | |
f7a874b8 DM |
4663 | |
4664 | /* process each return arg */ | |
4665 | ||
4666 | do { | |
4667 | SV *sv = *from_sp++; | |
4668 | ||
4669 | assert(PL_tmps_ix + nargs < PL_tmps_max); | |
3645bb38 DM |
4670 | #ifdef DEBUGGING |
4671 | /* PADTMPs with container set magic shouldn't appear in the | |
4672 | * wild. This assert is more important for pp_leavesublv(), | |
4673 | * but by testing for it here, we're more likely to catch | |
4674 | * bad cases (what with :lvalue subs not being widely | |
4675 | * deployed). The two issues are that for something like | |
4676 | * sub :lvalue { $tied{foo} } | |
4677 | * or | |
4678 | * sub :lvalue { substr($foo,1,2) } | |
4679 | * pp_leavesublv() will croak if the sub returns a PADTMP, | |
4680 | * and currently functions like pp_substr() return a mortal | |
4681 | * rather than using their PADTMP when returning a PVLV. | |
4682 | * This is because the PVLV will hold a ref to $foo, | |
4683 | * so $foo would get delayed in being freed while | |
4684 | * the PADTMP SV remained in the PAD. | |
4685 | * So if this assert fails it means either: | |
4686 | * 1) there is pp code similar to pp_substr that is | |
4687 | * returning a PADTMP instead of a mortal, and probably | |
4688 | * needs fixing, or | |
5d9c1c9a | 4689 | * 2) pp_leavesublv is making unwarranted assumptions |
3645bb38 DM |
4690 | * about always croaking on a PADTMP |
4691 | */ | |
4692 | if (SvPADTMP(sv) && SvSMAGICAL(sv)) { | |
4693 | MAGIC *mg; | |
4694 | for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) { | |
4695 | assert(PERL_MAGIC_TYPE_IS_VALUE_MAGIC(mg->mg_type)); | |
4696 | } | |
4697 | } | |
4698 | #endif | |
f7a874b8 | 4699 | |
799da9d7 DM |
4700 | if ( |
4701 | pass == 0 ? (SvTEMP(sv) && !SvMAGICAL(sv) && SvREFCNT(sv) == 1) | |
4702 | : pass == 1 ? ((SvTEMP(sv) || SvPADTMP(sv)) && !SvMAGICAL(sv) && SvREFCNT(sv) == 1) | |
4703 | : pass == 2 ? (!SvPADTMP(sv)) | |
4704 | : 1) | |
4705 | { | |
4706 | /* pass through: skip copy for logic or optimisation | |
4707 | * reasons; instead mortalise it, except that ... */ | |
e02ce34b | 4708 | *++to_sp = sv; |
f7a874b8 | 4709 | |
799da9d7 DM |
4710 | if (SvTEMP(sv)) { |
4711 | /* ... since this SV is an SvTEMP , we don't need to | |
4712 | * re-mortalise it; instead we just need to ensure | |
4713 | * that its existing entry in the temps stack frame | |
4714 | * ends up below the cut and so avoids being freed | |
4715 | * this time round. We mark it as needing to be kept | |
4716 | * by temporarily unsetting SvTEMP; then at the end, | |
4717 | * we shuffle any !SvTEMP entries on the tmps stack | |
4718 | * back below the cut. | |
4719 | * However, there's a significant chance that there's | |
4720 | * a 1:1 correspondence between the first few (or all) | |
4721 | * elements in the return args stack frame and those | |
4722 | * in the temps stack frame; e,g.: | |
4723 | * sub f { ....; map {...} .... }, | |
4724 | * or if we're exiting multiple scopes and one of the | |
4725 | * inner scopes has already made mortal copies of each | |
4726 | * return arg. | |
4727 | * | |
4728 | * If so, this arg sv will correspond to the next item | |
4729 | * on the tmps stack above the cut, and so can be kept | |
4730 | * merely by moving the cut boundary up one, rather | |
4731 | * than messing with SvTEMP. If all args are 1:1 then | |
4732 | * we can avoid the sorting stage below completely. | |
977d0c81 DM |
4733 | * |
4734 | * If there are no items above the cut on the tmps | |
4735 | * stack, then the SvTEMP must comne from an item | |
4736 | * below the cut, so there's nothing to do. | |
799da9d7 | 4737 | */ |
977d0c81 DM |
4738 | if (tmps_basep <= &PL_tmps_stack[PL_tmps_ix]) { |
4739 | if (sv == *tmps_basep) | |
4740 | tmps_basep++; | |
4741 | else | |
4742 | SvTEMP_off(sv); | |
4743 | } | |
799da9d7 | 4744 | } |
75bc488d | 4745 | else if (!SvPADTMP(sv)) { |
799da9d7 | 4746 | /* mortalise arg to avoid it being freed during save |
75bc488d | 4747 | * stack unwinding. Pad tmps don't need mortalising as |
977d0c81 DM |
4748 | * they're never freed. This is the equivalent of |
4749 | * sv_2mortal(SvREFCNT_inc(sv)), except that: | |
799da9d7 DM |
4750 | * * it assumes that the temps stack has already been |
4751 | * extended; | |
4752 | * * it puts the new item at the cut rather than at | |
4753 | * ++PL_tmps_ix, moving the previous occupant there | |
4754 | * instead. | |
4755 | */ | |
4756 | if (!SvIMMORTAL(sv)) { | |
977d0c81 | 4757 | SvREFCNT_inc_simple_void_NN(sv); |
799da9d7 | 4758 | SvTEMP_on(sv); |
977d0c81 DM |
4759 | /* Note that if there's nothing above the cut, |
4760 | * this copies the garbage one slot above | |
4761 | * PL_tmps_ix onto itself. This is harmless (the | |
4762 | * stack's already been extended), but might in | |
4763 | * theory trigger warnings from tools like ASan | |
4764 | */ | |
799da9d7 DM |
4765 | PL_tmps_stack[++PL_tmps_ix] = *tmps_basep; |
4766 | *tmps_basep++ = sv; | |
4767 | } | |
4768 | } | |
f7a874b8 DM |
4769 | } |
4770 | else { | |
4771 | /* Make a mortal copy of the SV. | |
4772 | * The following code is the equivalent of sv_mortalcopy() | |
4773 | * except that: | |
4774 | * * it assumes the temps stack has already been extended; | |
4775 | * * it optimises the copying for some simple SV types; | |
4776 | * * it puts the new item at the cut rather than at | |
4777 | * ++PL_tmps_ix, moving the previous occupant there | |
4778 | * instead. | |
4779 | */ | |
4780 | SV *newsv = newSV(0); | |
4781 | ||
4782 | PL_tmps_stack[++PL_tmps_ix] = *tmps_basep; | |
4783 | /* put it on the tmps stack early so it gets freed if we die */ | |
4784 | *tmps_basep++ = newsv; | |
e02ce34b | 4785 | *++to_sp = newsv; |
f7a874b8 DM |
4786 | |
4787 | if (SvTYPE(sv) <= SVt_IV) { | |
4788 | /* arg must be one of undef, IV/UV, or RV: skip | |
4789 | * sv_setsv_flags() and do the copy directly */ | |
4790 | U32 dstflags; | |
4791 | U32 srcflags = SvFLAGS(sv); | |
4792 | ||
4793 | assert(!SvGMAGICAL(sv)); | |
4794 | if (srcflags & (SVf_IOK|SVf_ROK)) { | |
4795 | SET_SVANY_FOR_BODYLESS_IV(newsv); | |
4796 | ||
4797 | if (srcflags & SVf_ROK) { | |
4798 | newsv->sv_u.svu_rv = SvREFCNT_inc(SvRV(sv)); | |
4799 | /* SV type plus flags */ | |
4800 | dstflags = (SVt_IV|SVf_ROK|SVs_TEMP); | |
4801 | } | |
4802 | else { | |
4803 | /* both src and dst are <= SVt_IV, so sv_any | |
4804 | * points to the head; so access the heads | |
4805 | * directly rather than going via sv_any. | |
4806 | */ | |
4807 | assert( &(sv->sv_u.svu_iv) | |
4808 | == &(((XPVIV*) SvANY(sv))->xiv_iv)); | |
4809 | assert( &(newsv->sv_u.svu_iv) | |
4810 | == &(((XPVIV*) SvANY(newsv))->xiv_iv)); | |
4811 | newsv->sv_u.svu_iv = sv->sv_u.svu_iv; | |
4812 | /* SV type plus flags */ | |
4813 | dstflags = (SVt_IV|SVf_IOK|SVp_IOK|SVs_TEMP | |
4814 | |(srcflags & SVf_IVisUV)); | |
4815 | } | |
4816 | } | |
4817 | else { | |
4818 | assert(!(srcflags & SVf_OK)); | |
4819 | dstflags = (SVt_NULL|SVs_TEMP); /* SV type plus flags */ | |
4820 | } | |
4821 | SvFLAGS(newsv) = dstflags; | |
4822 | ||
4823 | } | |
4824 | else { | |
4825 | /* do the full sv_setsv() */ | |
4826 | SSize_t old_base; | |
4827 | ||
4828 | SvTEMP_on(newsv); | |
4829 | old_base = tmps_basep - PL_tmps_stack; | |
4830 | SvGETMAGIC(sv); | |
4831 | sv_setsv_flags(newsv, sv, SV_DO_COW_SVSETSV); | |
799da9d7 | 4832 | /* the mg_get or sv_setsv might have created new temps |
f7a874b8 DM |
4833 | * or realloced the tmps stack; regrow and reload */ |
4834 | EXTEND_MORTAL(nargs); | |
4835 | tmps_basep = PL_tmps_stack + old_base; | |
4836 | TAINT_NOT; /* Each item is independent */ | |
4837 | } | |
4838 | ||
4839 | } | |
4840 | } while (--nargs); | |
4841 | ||
4842 | /* If there are any temps left above the cut, we need to sort | |
4843 | * them into those to keep and those to free. The only ones to | |
4844 | * keep are those for which we've temporarily unset SvTEMP. | |
4845 | * Work inwards from the two ends at tmps_basep .. PL_tmps_ix, | |
4846 | * swapping pairs as necessary. Stop when we meet in the middle. | |
4847 | */ | |
4848 | { | |
4849 | SV **top = PL_tmps_stack + PL_tmps_ix; | |
4850 | while (tmps_basep <= top) { | |
4851 | SV *sv = *top; | |
4852 | if (SvTEMP(sv)) | |
4853 | top--; | |
4854 | else { | |
4855 | SvTEMP_on(sv); | |
4856 | *top = *tmps_basep; | |
4857 | *tmps_basep = sv; | |
4858 | tmps_basep++; | |
4859 | } | |
4860 | } | |
4861 | } | |
4862 | ||
4863 | tmps_base = tmps_basep - PL_tmps_stack; | |
4864 | } | |
4865 | ||
e02ce34b | 4866 | PL_stack_sp = to_sp; |
f7a874b8 DM |
4867 | |
4868 | /* unrolled FREETMPS() but using tmps_base-1 rather than PL_tmps_floor */ | |
4869 | while (PL_tmps_ix >= tmps_base) { | |
4870 | SV* const sv = PL_tmps_stack[PL_tmps_ix--]; | |
4871 | #ifdef PERL_POISON | |
4872 | PoisonWith(PL_tmps_stack + PL_tmps_ix + 1, 1, SV *, 0xAB); | |
4873 | #endif | |
4874 | if (LIKELY(sv)) { | |
4875 | SvTEMP_off(sv); | |
4876 | SvREFCNT_dec_NN(sv); /* note, can modify tmps_ix!!! */ | |
4877 | } | |
4878 | } | |
4879 | } | |
4880 | ||
4881 | ||
c349b9a0 DM |
4882 | /* also tail-called by pp_return */ |
4883 | ||
f7a874b8 DM |
4884 | PP(pp_leavesub) |
4885 | { | |
1c23e2bd | 4886 | U8 gimme; |
eb578fdb | 4887 | PERL_CONTEXT *cx; |
f7a874b8 | 4888 | SV **oldsp; |
5da525e9 | 4889 | OP *retop; |
a0d0e21e | 4890 | |
4ebe6e95 | 4891 | cx = CX_CUR(); |
61d3b95a DM |
4892 | assert(CxTYPE(cx) == CXt_SUB); |
4893 | ||
4894 | if (CxMULTICALL(cx)) { | |
1f0ba93b DM |
4895 | /* entry zero of a stack is always PL_sv_undef, which |
4896 | * simplifies converting a '()' return into undef in scalar context */ | |
4897 | assert(PL_stack_sp > PL_stack_base || *PL_stack_base == &PL_sv_undef); | |
9850bf21 | 4898 | return 0; |
1f0ba93b | 4899 | } |
9850bf21 | 4900 | |
61d3b95a | 4901 | gimme = cx->blk_gimme; |
f7a874b8 | 4902 | oldsp = PL_stack_base + cx->blk_oldsp; /* last arg of previous frame */ |
1c846c1f | 4903 | |
f7a874b8 DM |
4904 | if (gimme == G_VOID) |
4905 | PL_stack_sp = oldsp; | |
4906 | else | |
e02ce34b | 4907 | leave_adjust_stacks(oldsp, oldsp, gimme, 0); |
1c846c1f | 4908 | |
2f450c1b | 4909 | CX_LEAVE_SCOPE(cx); |
a73d8813 | 4910 | cx_popsub(cx); /* Stack values are safe: release CV and @_ ... */ |
ed8ff0f3 | 4911 | cx_popblock(cx); |
5da525e9 DM |
4912 | retop = cx->blk_sub.retop; |
4913 | CX_POP(cx); | |
a0d0e21e | 4914 | |
5da525e9 | 4915 | return retop; |
a0d0e21e LW |
4916 | } |
4917 | ||
6e45d846 DM |
4918 | |
4919 | /* clear (if possible) or abandon the current @_. If 'abandon' is true, | |
4920 | * forces an abandon */ | |
4921 | ||
4922 | void | |
4923 | Perl_clear_defarray(pTHX_ AV* av, bool abandon) | |
4924 | { | |
4925 | const SSize_t fill = AvFILLp(av); | |
4926 | ||
4927 | PERL_ARGS_ASSERT_CLEAR_DEFARRAY; | |
4928 | ||
656457d0 | 4929 | if (LIKELY(!abandon && SvREFCNT(av) == 1 && !SvMAGICAL(av))) { |
c3d969bf | 4930 | av_clear(av); |
656457d0 DM |
4931 | AvREIFY_only(av); |
4932 | } | |
c3d969bf | 4933 | else { |
656457d0 DM |
4934 | AV *newav = newAV(); |
4935 | av_extend(newav, fill); | |
4936 | AvREIFY_only(newav); | |
4937 | PAD_SVl(0) = MUTABLE_SV(newav); | |
c3d969bf | 4938 | SvREFCNT_dec_NN(av); |
c3d969bf | 4939 | } |
6e45d846 DM |
4940 | } |
4941 | ||
4942 | ||
a0d0e21e LW |
4943 | PP(pp_entersub) |
4944 | { | |
20b7effb | 4945 | dSP; dPOPss; |
a0d0e21e | 4946 | GV *gv; |
eb578fdb KW |
4947 | CV *cv; |
4948 | PERL_CONTEXT *cx; | |
8ae997c5 | 4949 | I32 old_savestack_ix; |
a0d0e21e | 4950 | |
f5719c02 | 4951 | if (UNLIKELY(!sv)) |
1ff56747 DM |
4952 | goto do_die; |
4953 | ||
4954 | /* Locate the CV to call: | |
4955 | * - most common case: RV->CV: f(), $ref->(): | |
4956 | * note that if a sub is compiled before its caller is compiled, | |
4957 | * the stash entry will be a ref to a CV, rather than being a GV. | |
4958 | * - second most common case: CV: $ref->method() | |
4959 | */ | |
4960 | ||
4961 | /* a non-magic-RV -> CV ? */ | |
4962 | if (LIKELY( (SvFLAGS(sv) & (SVf_ROK|SVs_GMG)) == SVf_ROK)) { | |
4963 | cv = MUTABLE_CV(SvRV(sv)); | |
4964 | if (UNLIKELY(SvOBJECT(cv))) /* might be overloaded */ | |
4965 | goto do_ref; | |
4966 | } | |
4967 | else | |
4968 | cv = MUTABLE_CV(sv); | |
4969 | ||
4970 | /* a CV ? */ | |
4971 | if (UNLIKELY(SvTYPE(cv) != SVt_PVCV)) { | |
4972 | /* handle all the weird cases */ | |
313107ce | 4973 | switch (SvTYPE(sv)) { |
1ff56747 DM |
4974 | case SVt_PVLV: |
4975 | if (!isGV_with_GP(sv)) | |
4976 | goto do_default; | |
4977 | /* FALLTHROUGH */ | |
313107ce | 4978 | case SVt_PVGV: |
1ff56747 DM |
4979 | cv = GvCVu((const GV *)sv); |
4980 | if (UNLIKELY(!cv)) { | |
313107ce DM |
4981 | HV *stash; |
4982 | cv = sv_2cv(sv, &stash, &gv, 0); | |
1ff56747 DM |
4983 | if (!cv) { |
4984 | old_savestack_ix = PL_savestack_ix; | |
4985 | goto try_autoload; | |
4986 | } | |
313107ce DM |
4987 | } |
4988 | break; | |
1ff56747 | 4989 | |
313107ce | 4990 | default: |
1ff56747 | 4991 | do_default: |
313107ce DM |
4992 | SvGETMAGIC(sv); |
4993 | if (SvROK(sv)) { | |
1ff56747 DM |
4994 | do_ref: |
4995 | if (UNLIKELY(SvAMAGIC(sv))) { | |
313107ce DM |
4996 | sv = amagic_deref_call(sv, to_cv_amg); |
4997 | /* Don't SPAGAIN here. */ | |
4998 | } | |
4999 | } | |
5000 | else { | |
5001 | const char *sym; | |
5002 | STRLEN len; | |
1ff56747 | 5003 | if (UNLIKELY(!SvOK(sv))) |
313107ce | 5004 | DIE(aTHX_ PL_no_usym, "a subroutine"); |
1ff56747 | 5005 | |
313107ce DM |
5006 | sym = SvPV_nomg_const(sv, len); |
5007 | if (PL_op->op_private & HINT_STRICT_REFS) | |
5008 | DIE(aTHX_ "Can't use string (\"%" SVf32 "\"%s) as a subroutine ref while \"strict refs\" in use", sv, len>32 ? "..." : ""); | |
5009 | cv = get_cvn_flags(sym, len, GV_ADD|SvUTF8(sv)); | |
5010 | break; | |
5011 | } | |
5012 | cv = MUTABLE_CV(SvRV(sv)); | |
1ff56747 | 5013 | if (LIKELY(SvTYPE(cv) == SVt_PVCV)) |
313107ce | 5014 | break; |
924ba076 | 5015 | /* FALLTHROUGH */ |
313107ce DM |
5016 | case SVt_PVHV: |
5017 | case SVt_PVAV: | |
1ff56747 | 5018 | do_die: |
313107ce | 5019 | DIE(aTHX_ "Not a CODE reference"); |
313107ce | 5020 | } |
f5719c02 | 5021 | } |
a0d0e21e | 5022 | |
8ae997c5 | 5023 | /* At this point we want to save PL_savestack_ix, either by doing a |
a73d8813 | 5024 | * cx_pushsub(), or for XS, doing an ENTER. But we don't yet know the final |
8ae997c5 | 5025 | * CV we will be using (so we don't know whether its XS, so we can't |
a73d8813 | 5026 | * cx_pushsub() or ENTER yet), and determining cv may itself push stuff on |
8ae997c5 DM |
5027 | * the save stack. So remember where we are currently on the save |
5028 | * stack, and later update the CX or scopestack entry accordingly. */ | |
5029 | old_savestack_ix = PL_savestack_ix; | |
a0d0e21e | 5030 | |
f29834c6 DM |
5031 | /* these two fields are in a union. If they ever become separate, |
5032 | * we have to test for both of them being null below */ | |
9a28816a | 5033 | assert(cv); |
f29834c6 DM |
5034 | assert((void*)&CvROOT(cv) == (void*)&CvXSUB(cv)); |
5035 | while (UNLIKELY(!CvROOT(cv))) { | |
2f349aa0 NC |
5036 | GV* autogv; |
5037 | SV* sub_name; | |
5038 | ||
5039 | /* anonymous or undef'd function leaves us no recourse */ | |
ae77754a | 5040 | if (CvLEXICAL(cv) && CvHASGV(cv)) |
147e3846 | 5041 | DIE(aTHX_ "Undefined subroutine &%" SVf " called", |
ecf05a58 | 5042 | SVfARG(cv_name(cv, NULL, 0))); |
ae77754a | 5043 | if (CvANON(cv) || !CvHASGV(cv)) { |
2f349aa0 | 5044 | DIE(aTHX_ "Undefined subroutine called"); |
7d2057d8 | 5045 | } |
2f349aa0 NC |
5046 | |
5047 | /* autoloaded stub? */ | |
ae77754a | 5048 | if (cv != GvCV(gv = CvGV(cv))) { |
2f349aa0 NC |
5049 | cv = GvCV(gv); |
5050 | } | |
5051 | /* should call AUTOLOAD now? */ | |
5052 | else { | |
7b52d656 | 5053 | try_autoload: |
b4b431d9 | 5054 | autogv = gv_autoload_pvn(GvSTASH(gv), GvNAME(gv), GvNAMELEN(gv), |
1de22db2 FC |
5055 | (GvNAMEUTF8(gv) ? SVf_UTF8 : 0) |
5056 | |(PL_op->op_flags & OPf_REF | |
5057 | ? GV_AUTOLOAD_ISMETHOD | |
5058 | : 0)); | |
b4b431d9 | 5059 | cv = autogv ? GvCV(autogv) : NULL; |
2f349aa0 | 5060 | } |
b4b431d9 DM |
5061 | if (!cv) { |
5062 | sub_name = sv_newmortal(); | |
5063 | gv_efullname3(sub_name, gv, NULL); | |
147e3846 | 5064 | DIE(aTHX_ "Undefined subroutine &%" SVf " called", SVfARG(sub_name)); |
b4b431d9 | 5065 | } |
a0d0e21e LW |
5066 | } |
5067 | ||
4f25d042 DM |
5068 | /* unrolled "CvCLONE(cv) && ! CvCLONED(cv)" */ |
5069 | if (UNLIKELY((CvFLAGS(cv) & (CVf_CLONE|CVf_CLONED)) == CVf_CLONE)) | |
654c6d71 DM |
5070 | DIE(aTHX_ "Closure prototype called"); |
5071 | ||
f5719c02 DM |
5072 | if (UNLIKELY((PL_op->op_private & OPpENTERSUB_DB) && GvCV(PL_DBsub) |
5073 | && !CvNODEBUG(cv))) | |
5074 | { | |
005a8a35 | 5075 | Perl_get_db_sub(aTHX_ &sv, cv); |
a9ef256d NC |
5076 | if (CvISXSUB(cv)) |
5077 | PL_curcopdb = PL_curcop; | |
1ad62f64 BR |
5078 | if (CvLVALUE(cv)) { |
5079 | /* check for lsub that handles lvalue subroutines */ | |
07b605e5 | 5080 | cv = GvCV(gv_fetchpvs("DB::lsub", GV_ADDMULTI, SVt_PVCV)); |
1ad62f64 BR |
5081 | /* if lsub not found then fall back to DB::sub */ |
5082 | if (!cv) cv = GvCV(PL_DBsub); | |
5083 | } else { | |
5084 | cv = GvCV(PL_DBsub); | |
5085 | } | |
a9ef256d | 5086 | |
ccafdc96 RGS |
5087 | if (!cv || (!CvXSUB(cv) && !CvSTART(cv))) |
5088 | DIE(aTHX_ "No DB::sub routine defined"); | |
67caa1fe | 5089 | } |
a0d0e21e | 5090 | |
aed2304a | 5091 | if (!(CvISXSUB(cv))) { |
f1025168 | 5092 | /* This path taken at least 75% of the time */ |
a0d0e21e | 5093 | dMARK; |
c53244ca | 5094 | PADLIST *padlist; |
3689ad62 | 5095 | I32 depth; |
44dd5d49 | 5096 | bool hasargs; |
1c23e2bd | 5097 | U8 gimme; |
f5719c02 | 5098 | |
20448bad DM |
5099 | /* keep PADTMP args alive throughout the call (we need to do this |
5100 | * because @_ isn't refcounted). Note that we create the mortals | |
5101 | * in the caller's tmps frame, so they won't be freed until after | |
5102 | * we return from the sub. | |
5103 | */ | |
91bab027 | 5104 | { |
20448bad DM |
5105 | SV **svp = MARK; |
5106 | while (svp < SP) { | |
5107 | SV *sv = *++svp; | |
5108 | if (!sv) | |
5109 | continue; | |
5110 | if (SvPADTMP(sv)) | |
5111 | *svp = sv = sv_mortalcopy(sv); | |
5112 | SvTEMP_off(sv); | |
5113 | } | |
5114 | } | |
5115 | ||
801bbf61 | 5116 | gimme = GIMME_V; |
ed8ff0f3 | 5117 | cx = cx_pushblock(CXt_SUB, gimme, MARK, old_savestack_ix); |
44dd5d49 | 5118 | hasargs = cBOOL(PL_op->op_flags & OPf_STACKED); |
a73d8813 | 5119 | cx_pushsub(cx, cv, PL_op->op_next, hasargs); |
8ae997c5 | 5120 | |
c53244ca | 5121 | padlist = CvPADLIST(cv); |
d2af2719 | 5122 | if (UNLIKELY((depth = ++CvDEPTH(cv)) >= 2)) |
3689ad62 | 5123 | pad_push(padlist, depth); |
3689ad62 | 5124 | PAD_SET_CUR_NOSAVE(padlist, depth); |
f5719c02 | 5125 | if (LIKELY(hasargs)) { |
10533ace | 5126 | AV *const av = MUTABLE_AV(PAD_SVl(0)); |
bdf02c57 DM |
5127 | SSize_t items; |
5128 | AV **defavp; | |
5129 | ||
bdf02c57 DM |
5130 | defavp = &GvAV(PL_defgv); |
5131 | cx->blk_sub.savearray = *defavp; | |
5132 | *defavp = MUTABLE_AV(SvREFCNT_inc_simple_NN(av)); | |
a0d0e21e | 5133 | |
72f28af4 DM |
5134 | /* it's the responsibility of whoever leaves a sub to ensure |
5135 | * that a clean, empty AV is left in pad[0]. This is normally | |
a73d8813 | 5136 | * done by cx_popsub() */ |
72f28af4 DM |
5137 | assert(!AvREAL(av) && AvFILLp(av) == -1); |
5138 | ||
5139 | items = SP - MARK; | |
f5719c02 | 5140 | if (UNLIKELY(items - 1 > AvMAX(av))) { |
77d27ef6 | 5141 | SV **ary = AvALLOC(av); |
77d27ef6 | 5142 | Renew(ary, items, SV*); |
00195859 | 5143 | AvMAX(av) = items - 1; |
77d27ef6 SF |
5144 | AvALLOC(av) = ary; |
5145 | AvARRAY(av) = ary; | |
5146 | } | |
5147 | ||
f14cf363 TC |
5148 | if (items) |
5149 | Copy(MARK+1,AvARRAY(av),items,SV*); | |
93965878 | 5150 | AvFILLp(av) = items - 1; |
a0d0e21e | 5151 | } |
f5719c02 DM |
5152 | if (UNLIKELY((cx->blk_u16 & OPpENTERSUB_LVAL_MASK) == OPpLVAL_INTRO && |
5153 | !CvLVALUE(cv))) | |
147e3846 | 5154 | DIE(aTHX_ "Can't modify non-lvalue subroutine call of &%" SVf, |
0f948285 | 5155 | SVfARG(cv_name(cv, NULL, 0))); |
4a925ff6 GS |
5156 | /* warning must come *after* we fully set up the context |
5157 | * stuff so that __WARN__ handlers can safely dounwind() | |
5158 | * if they want to | |
5159 | */ | |
3689ad62 | 5160 | if (UNLIKELY(depth == PERL_SUB_DEPTH_WARN |
f5719c02 DM |
5161 | && ckWARN(WARN_RECURSION) |
5162 | && !(PERLDB_SUB && cv == GvCV(PL_DBsub)))) | |
4a925ff6 | 5163 | sub_crush_depth(cv); |
a0d0e21e LW |
5164 | RETURNOP(CvSTART(cv)); |
5165 | } | |
f1025168 | 5166 | else { |
de935cc9 | 5167 | SSize_t markix = TOPMARK; |
71d19c37 | 5168 | bool is_scalar; |
f1025168 | 5169 | |
8ae997c5 DM |
5170 | ENTER; |
5171 | /* pretend we did the ENTER earlier */ | |
5172 | PL_scopestack[PL_scopestack_ix - 1] = old_savestack_ix; | |
5173 | ||
b479c9f2 | 5174 | SAVETMPS; |
3a76ca88 | 5175 | PUTBACK; |
f1025168 | 5176 | |
f5719c02 | 5177 | if (UNLIKELY(((PL_op->op_private |
490576d1 | 5178 | & CX_PUSHSUB_GET_LVALUE_MASK(Perl_is_lvalue_sub) |
4587c532 | 5179 | ) & OPpENTERSUB_LVAL_MASK) == OPpLVAL_INTRO && |
f5719c02 | 5180 | !CvLVALUE(cv))) |
147e3846 | 5181 | DIE(aTHX_ "Can't modify non-lvalue subroutine call of &%" SVf, |
0f948285 | 5182 | SVfARG(cv_name(cv, NULL, 0))); |
4587c532 | 5183 | |
44dd5d49 | 5184 | if (UNLIKELY(!(PL_op->op_flags & OPf_STACKED) && GvAV(PL_defgv))) { |
3a76ca88 RGS |
5185 | /* Need to copy @_ to stack. Alternative may be to |
5186 | * switch stack to @_, and copy return values | |
5187 | * back. This would allow popping @_ in XSUB, e.g.. XXXX */ | |
5188 | AV * const av = GvAV(PL_defgv); | |
ad39f3a2 | 5189 | const SSize_t items = AvFILL(av) + 1; |
3a76ca88 RGS |
5190 | |
5191 | if (items) { | |
dd2a7f90 | 5192 | SSize_t i = 0; |
ad39f3a2 | 5193 | const bool m = cBOOL(SvRMAGICAL(av)); |
3a76ca88 RGS |
5194 | /* Mark is at the end of the stack. */ |
5195 | EXTEND(SP, items); | |
dd2a7f90 | 5196 | for (; i < items; ++i) |
ad39f3a2 FC |
5197 | { |
5198 | SV *sv; | |
5199 | if (m) { | |
5200 | SV ** const svp = av_fetch(av, i, 0); | |
5201 | sv = svp ? *svp : NULL; | |
5202 | } | |
5203 | else sv = AvARRAY(av)[i]; | |
5204 | if (sv) SP[i+1] = sv; | |
dd2a7f90 | 5205 | else { |
7406cffe | 5206 | SP[i+1] = av_nonelem(av, i); |
dd2a7f90 | 5207 | } |
ad39f3a2 | 5208 | } |
3a76ca88 RGS |
5209 | SP += items; |
5210 | PUTBACK ; | |
5211 | } | |
5212 | } | |
3455055f FC |
5213 | else { |
5214 | SV **mark = PL_stack_base + markix; | |
de935cc9 | 5215 | SSize_t items = SP - mark; |
3455055f FC |
5216 | while (items--) { |
5217 | mark++; | |
60779a30 | 5218 | if (*mark && SvPADTMP(*mark)) { |
3455055f | 5219 | *mark = sv_mortalcopy(*mark); |
60779a30 | 5220 | } |
3455055f FC |
5221 | } |
5222 | } | |
3a76ca88 | 5223 | /* We assume first XSUB in &DB::sub is the called one. */ |
f5719c02 | 5224 | if (UNLIKELY(PL_curcopdb)) { |
3a76ca88 RGS |
5225 | SAVEVPTR(PL_curcop); |
5226 | PL_curcop = PL_curcopdb; | |
5227 | PL_curcopdb = NULL; | |
5228 | } | |
5229 | /* Do we need to open block here? XXXX */ | |
72df79cf | 5230 | |
71d19c37 DM |
5231 | /* calculate gimme here as PL_op might get changed and then not |
5232 | * restored until the LEAVE further down */ | |
5233 | is_scalar = (GIMME_V == G_SCALAR); | |
5234 | ||
72df79cf GF |
5235 | /* CvXSUB(cv) must not be NULL because newXS() refuses NULL xsub address */ |
5236 | assert(CvXSUB(cv)); | |
16c91539 | 5237 | CvXSUB(cv)(aTHX_ cv); |
3a76ca88 | 5238 | |
cfbdacd3 TC |
5239 | #if defined DEBUGGING && !defined DEBUGGING_RE_ONLY |
5240 | /* This duplicates the check done in runops_debug(), but provides more | |
5241 | * information in the common case of the fault being with an XSUB. | |
5242 | * | |
5243 | * It should also catch an XSUB pushing more than it extends | |
5244 | * in scalar context. | |
5245 | */ | |
5246 | if (PL_curstackinfo->si_stack_hwm < PL_stack_sp - PL_stack_base) | |
5247 | Perl_croak_nocontext( | |
5248 | "panic: XSUB %s::%s (%s) failed to extend arg stack: " | |
5249 | "base=%p, sp=%p, hwm=%p\n", | |
5250 | HvNAME(GvSTASH(CvGV(cv))), GvNAME(CvGV(cv)), CvFILE(cv), | |
5251 | PL_stack_base, PL_stack_sp, | |
5252 | PL_stack_base + PL_curstackinfo->si_stack_hwm); | |
5253 | #endif | |
3a76ca88 | 5254 | /* Enforce some sanity in scalar context. */ |
71d19c37 | 5255 | if (is_scalar) { |
89a18b40 DM |
5256 | SV **svp = PL_stack_base + markix + 1; |
5257 | if (svp != PL_stack_sp) { | |
5258 | *svp = svp > PL_stack_sp ? &PL_sv_undef : *PL_stack_sp; | |
5259 | PL_stack_sp = svp; | |
5260 | } | |
3a76ca88 | 5261 | } |
a57c6685 | 5262 | LEAVE; |
f1025168 NC |
5263 | return NORMAL; |
5264 | } | |
a0d0e21e LW |
5265 | } |
5266 | ||
44a8e56a | 5267 | void |
864dbfa3 | 5268 | Perl_sub_crush_depth(pTHX_ CV *cv) |
44a8e56a | 5269 | { |
7918f24d NC |
5270 | PERL_ARGS_ASSERT_SUB_CRUSH_DEPTH; |
5271 | ||
44a8e56a | 5272 | if (CvANON(cv)) |
9014280d | 5273 | Perl_warner(aTHX_ packWARN(WARN_RECURSION), "Deep recursion on anonymous subroutine"); |
44a8e56a | 5274 | else { |
147e3846 | 5275 | Perl_warner(aTHX_ packWARN(WARN_RECURSION), "Deep recursion on subroutine \"%" SVf "\"", |
ecf05a58 | 5276 | SVfARG(cv_name(cv,NULL,0))); |
44a8e56a | 5277 | } |
5278 | } | |
5279 | ||
4fa06845 DM |
5280 | |
5281 | ||
5282 | /* like croak, but report in context of caller */ | |
5283 | ||
5284 | void | |
5285 | Perl_croak_caller(const char *pat, ...) | |
5286 | { | |
5287 | dTHX; | |
5288 | va_list args; | |
5289 | const PERL_CONTEXT *cx = caller_cx(0, NULL); | |
5290 | ||
5291 | /* make error appear at call site */ | |
5292 | assert(cx); | |
5293 | PL_curcop = cx->blk_oldcop; | |
5294 | ||
5295 | va_start(args, pat); | |
5296 | vcroak(pat, &args); | |
5297 | NOT_REACHED; /* NOTREACHED */ | |
5298 | va_end(args); | |
5299 | } | |
5300 | ||
5301 | ||
a0d0e21e LW |
5302 | PP(pp_aelem) |
5303 | { | |
20b7effb | 5304 | dSP; |
a0d0e21e | 5305 | SV** svp; |
a3b680e6 | 5306 | SV* const elemsv = POPs; |
d804643f | 5307 | IV elem = SvIV(elemsv); |
502c6561 | 5308 | AV *const av = MUTABLE_AV(POPs); |
e1ec3a88 | 5309 | const U32 lval = PL_op->op_flags & OPf_MOD || LVRET; |
bbfdc870 | 5310 | const U32 defer = PL_op->op_private & OPpLVAL_DEFER; |
4ad10a0b VP |
5311 | const bool localizing = PL_op->op_private & OPpLVAL_INTRO; |
5312 | bool preeminent = TRUE; | |
be6c24e0 | 5313 | SV *sv; |
a0d0e21e | 5314 | |
5d9574c1 | 5315 | if (UNLIKELY(SvROK(elemsv) && !SvGAMAGIC(elemsv) && ckWARN(WARN_MISC))) |
95b63a38 | 5316 | Perl_warner(aTHX_ packWARN(WARN_MISC), |
147e3846 | 5317 | "Use of reference \"%" SVf "\" as array index", |
be2597df | 5318 | SVfARG(elemsv)); |
5d9574c1 | 5319 | if (UNLIKELY(SvTYPE(av) != SVt_PVAV)) |
a0d0e21e | 5320 | RETPUSHUNDEF; |
4ad10a0b | 5321 | |
5d9574c1 | 5322 | if (UNLIKELY(localizing)) { |
4ad10a0b VP |
5323 | MAGIC *mg; |
5324 | HV *stash; | |
5325 | ||
5326 | /* If we can determine whether the element exist, | |
5327 | * Try to preserve the existenceness of a tied array | |
5328 | * element by using EXISTS and DELETE if possible. | |
5329 | * Fallback to FETCH and STORE otherwise. */ | |
5330 | if (SvCANEXISTDELETE(av)) | |
5331 | preeminent = av_exists(av, elem); | |
5332 | } | |
5333 | ||
68dc0745 | 5334 | svp = av_fetch(av, elem, lval && !defer); |
a0d0e21e | 5335 | if (lval) { |
2b573ace | 5336 | #ifdef PERL_MALLOC_WRAP |
2b573ace | 5337 | if (SvUOK(elemsv)) { |
a9c4fd4e | 5338 | const UV uv = SvUV(elemsv); |
2b573ace JH |
5339 | elem = uv > IV_MAX ? IV_MAX : uv; |
5340 | } | |
5341 | else if (SvNOK(elemsv)) | |
5342 | elem = (IV)SvNV(elemsv); | |
a3b680e6 | 5343 | if (elem > 0) { |
814eedc8 | 5344 | MEM_WRAP_CHECK_s(elem,SV*,"Out of memory during array extend"); |
a3b680e6 | 5345 | } |
2b573ace | 5346 | #endif |
ce0d59fd | 5347 | if (!svp || !*svp) { |
bbfdc870 | 5348 | IV len; |
68dc0745 | 5349 | if (!defer) |
cea2e8a9 | 5350 | DIE(aTHX_ PL_no_aelem, elem); |
b9f2b683 | 5351 | len = av_tindex(av); |
9ef753fe FC |
5352 | /* Resolve a negative index that falls within the array. Leave |
5353 | it negative it if falls outside the array. */ | |
5354 | if (elem < 0 && len + elem >= 0) | |
5355 | elem = len + elem; | |
5356 | if (elem >= 0 && elem <= len) | |
5357 | /* Falls within the array. */ | |
5358 | PUSHs(av_nonelem(av,elem)); | |
5359 | else | |
5360 | /* Falls outside the array. If it is negative, | |
5361 | magic_setdefelem will use the index for error reporting. | |
5362 | */ | |
5363 | mPUSHs(newSVavdefelem(av, elem, 1)); | |
68dc0745 | 5364 | RETURN; |
5365 | } | |
5d9574c1 | 5366 | if (UNLIKELY(localizing)) { |
4ad10a0b VP |
5367 | if (preeminent) |
5368 | save_aelem(av, elem, svp); | |
5369 | else | |
5370 | SAVEADELETE(av, elem); | |
5371 | } | |
9026059d GG |
5372 | else if (PL_op->op_private & OPpDEREF) { |
5373 | PUSHs(vivify_ref(*svp, PL_op->op_private & OPpDEREF)); | |
5374 | RETURN; | |
5375 | } | |
a0d0e21e | 5376 | } |
3280af22 | 5377 | sv = (svp ? *svp : &PL_sv_undef); |
39cf747a | 5378 | if (!lval && SvRMAGICAL(av) && SvGMAGICAL(sv)) /* see note in pp_helem() */ |
fd69380d | 5379 | mg_get(sv); |
be6c24e0 | 5380 | PUSHs(sv); |
a0d0e21e LW |
5381 | RETURN; |
5382 | } | |
5383 | ||
9026059d | 5384 | SV* |
864dbfa3 | 5385 | Perl_vivify_ref(pTHX_ SV *sv, U32 to_what) |
02a9e968 | 5386 | { |
7918f24d NC |
5387 | PERL_ARGS_ASSERT_VIVIFY_REF; |
5388 | ||
5b295bef | 5389 | SvGETMAGIC(sv); |
02a9e968 CS |
5390 | if (!SvOK(sv)) { |
5391 | if (SvREADONLY(sv)) | |
cb077ed2 | 5392 | Perl_croak_no_modify(); |
43230e26 | 5393 | prepare_SV_for_RV(sv); |
68dc0745 | 5394 | switch (to_what) { |
5f05dabc | 5395 | case OPpDEREF_SV: |
561b68a9 | 5396 | SvRV_set(sv, newSV(0)); |
5f05dabc | 5397 | break; |
5398 | case OPpDEREF_AV: | |
ad64d0ec | 5399 | SvRV_set(sv, MUTABLE_SV(newAV())); |
5f05dabc | 5400 | break; |
5401 | case OPpDEREF_HV: | |
ad64d0ec | 5402 | SvRV_set(sv, MUTABLE_SV(newHV())); |
5f05dabc | 5403 | break; |
5404 | } | |
02a9e968 CS |
5405 | SvROK_on(sv); |
5406 | SvSETMAGIC(sv); | |
7e482323 | 5407 | SvGETMAGIC(sv); |
02a9e968 | 5408 | } |
9026059d GG |
5409 | if (SvGMAGICAL(sv)) { |
5410 | /* copy the sv without magic to prevent magic from being | |
5411 | executed twice */ | |
5412 | SV* msv = sv_newmortal(); | |
5413 | sv_setsv_nomg(msv, sv); | |
5414 | return msv; | |
5415 | } | |
5416 | return sv; | |
02a9e968 CS |
5417 | } |
5418 | ||
7d6c333c | 5419 | PERL_STATIC_INLINE HV * |
5420 | S_opmethod_stash(pTHX_ SV* meth) | |
f5d5a27c | 5421 | { |
a0d0e21e | 5422 | SV* ob; |
56304f61 | 5423 | HV* stash; |
b55b14d0 | 5424 | |
d648ffcb | 5425 | SV* const sv = PL_stack_base + TOPMARK == PL_stack_sp |
147e3846 | 5426 | ? (Perl_croak(aTHX_ "Can't call method \"%" SVf "\" without a " |
f226e9be FC |
5427 | "package or object reference", SVfARG(meth)), |
5428 | (SV *)NULL) | |
5429 | : *(PL_stack_base + TOPMARK + 1); | |
f5d5a27c | 5430 | |
7d6c333c | 5431 | PERL_ARGS_ASSERT_OPMETHOD_STASH; |
d648ffcb | 5432 | |
5d9574c1 | 5433 | if (UNLIKELY(!sv)) |
7156e69a | 5434 | undefined: |
147e3846 | 5435 | Perl_croak(aTHX_ "Can't call method \"%" SVf "\" on an undefined value", |
a214957f | 5436 | SVfARG(meth)); |
4f1b7578 | 5437 | |
d648ffcb | 5438 | if (UNLIKELY(SvGMAGICAL(sv))) mg_get(sv); |
5439 | else if (SvIsCOW_shared_hash(sv)) { /* MyClass->meth() */ | |
5440 | stash = gv_stashsv(sv, GV_CACHE_ONLY); | |
7d6c333c | 5441 | if (stash) return stash; |
d648ffcb | 5442 | } |
5443 | ||
a0d0e21e | 5444 | if (SvROK(sv)) |
ad64d0ec | 5445 | ob = MUTABLE_SV(SvRV(sv)); |
7156e69a | 5446 | else if (!SvOK(sv)) goto undefined; |
a77c16f7 FC |
5447 | else if (isGV_with_GP(sv)) { |
5448 | if (!GvIO(sv)) | |
147e3846 | 5449 | Perl_croak(aTHX_ "Can't call method \"%" SVf "\" " |
a77c16f7 FC |
5450 | "without a package or object reference", |
5451 | SVfARG(meth)); | |
5452 | ob = sv; | |
5453 | if (SvTYPE(ob) == SVt_PVLV && LvTYPE(ob) == 'y') { | |
5454 | assert(!LvTARGLEN(ob)); | |
5455 | ob = LvTARG(ob); | |
5456 | assert(ob); | |
5457 | } | |
5458 | *(PL_stack_base + TOPMARK + 1) = sv_2mortal(newRV(ob)); | |
5459 | } | |
a0d0e21e | 5460 | else { |
89269094 | 5461 | /* this isn't a reference */ |
a0d0e21e | 5462 | GV* iogv; |
f937af42 | 5463 | STRLEN packlen; |
89269094 | 5464 | const char * const packname = SvPV_nomg_const(sv, packlen); |
d283e876 | 5465 | const U32 packname_utf8 = SvUTF8(sv); |
5466 | stash = gv_stashpvn(packname, packlen, packname_utf8 | GV_CACHE_ONLY); | |
7d6c333c | 5467 | if (stash) return stash; |
081fc587 | 5468 | |
89269094 | 5469 | if (!(iogv = gv_fetchpvn_flags( |
d283e876 | 5470 | packname, packlen, packname_utf8, SVt_PVIO |
da6b625f | 5471 | )) || |
ad64d0ec | 5472 | !(ob=MUTABLE_SV(GvIO(iogv)))) |
a0d0e21e | 5473 | { |
af09ea45 | 5474 | /* this isn't the name of a filehandle either */ |
89269094 | 5475 | if (!packlen) |
834a4ddd | 5476 | { |
147e3846 | 5477 | Perl_croak(aTHX_ "Can't call method \"%" SVf "\" " |
7156e69a FC |
5478 | "without a package or object reference", |
5479 | SVfARG(meth)); | |
834a4ddd | 5480 | } |
af09ea45 | 5481 | /* assume it's a package name */ |
d283e876 | 5482 | stash = gv_stashpvn(packname, packlen, packname_utf8); |
7d6c333c | 5483 | if (stash) return stash; |
5484 | else return MUTABLE_HV(sv); | |
a0d0e21e | 5485 | } |
af09ea45 | 5486 | /* it _is_ a filehandle name -- replace with a reference */ |
ad64d0ec | 5487 | *(PL_stack_base + TOPMARK + 1) = sv_2mortal(newRV(MUTABLE_SV(iogv))); |
a0d0e21e LW |
5488 | } |
5489 | ||
1f3ffe4c | 5490 | /* if we got here, ob should be an object or a glob */ |
f0d43078 | 5491 | if (!ob || !(SvOBJECT(ob) |
a77c16f7 | 5492 | || (isGV_with_GP(ob) |
159b6efe | 5493 | && (ob = MUTABLE_SV(GvIO((const GV *)ob))) |
f0d43078 GS |
5494 | && SvOBJECT(ob)))) |
5495 | { | |
147e3846 | 5496 | Perl_croak(aTHX_ "Can't call method \"%" SVf "\" on unblessed reference", |
323dbd00 | 5497 | SVfARG((SvPOK(meth) && SvPVX(meth) == PL_isa_DOES) |
b375e37b BF |
5498 | ? newSVpvs_flags("DOES", SVs_TEMP) |
5499 | : meth)); | |
f0d43078 | 5500 | } |
a0d0e21e | 5501 | |
7d6c333c | 5502 | return SvSTASH(ob); |
5503 | } | |
5504 | ||
5505 | PP(pp_method) | |
5506 | { | |
5507 | dSP; | |
5508 | GV* gv; | |
5509 | HV* stash; | |
5510 | SV* const meth = TOPs; | |
5511 | ||
5512 | if (SvROK(meth)) { | |
5513 | SV* const rmeth = SvRV(meth); | |
5514 | if (SvTYPE(rmeth) == SVt_PVCV) { | |
5515 | SETs(rmeth); | |
5516 | RETURN; | |
5517 | } | |
5518 | } | |
a0d0e21e | 5519 | |
7d6c333c | 5520 | stash = opmethod_stash(meth); |
af09ea45 | 5521 | |
7d6c333c | 5522 | gv = gv_fetchmethod_sv_flags(stash, meth, GV_AUTOLOAD|GV_CROAK); |
5523 | assert(gv); | |
5524 | ||
5525 | SETs(isGV(gv) ? MUTABLE_SV(GvCV(gv)) : MUTABLE_SV(gv)); | |
5526 | RETURN; | |
5527 | } | |
5528 | ||
810bd8b7 | 5529 | #define METHOD_CHECK_CACHE(stash,cache,meth) \ |
5530 | const HE* const he = hv_fetch_ent(cache, meth, 0, 0); \ | |
5531 | if (he) { \ | |
5532 | gv = MUTABLE_GV(HeVAL(he)); \ | |
5533 | if (isGV(gv) && GvCV(gv) && (!GvCVGEN(gv) || GvCVGEN(gv) \ | |
5534 | == (PL_sub_generation + HvMROMETA(stash)->cache_gen))) \ | |
5535 | { \ | |
5536 | XPUSHs(MUTABLE_SV(GvCV(gv))); \ | |
5537 | RETURN; \ | |
5538 | } \ | |
5539 | } \ | |
5540 | ||
7d6c333c | 5541 | PP(pp_method_named) |
5542 | { | |
5543 | dSP; | |
5544 | GV* gv; | |
5545 | SV* const meth = cMETHOPx_meth(PL_op); | |
5546 | HV* const stash = opmethod_stash(meth); | |
5547 | ||
5548 | if (LIKELY(SvTYPE(stash) == SVt_PVHV)) { | |
810bd8b7 | 5549 | METHOD_CHECK_CACHE(stash, stash, meth); |
f5d5a27c CS |
5550 | } |
5551 | ||
7d6c333c | 5552 | gv = gv_fetchmethod_sv_flags(stash, meth, GV_AUTOLOAD|GV_CROAK); |
256d1bb2 | 5553 | assert(gv); |
9b9d0b15 | 5554 | |
7d6c333c | 5555 | XPUSHs(isGV(gv) ? MUTABLE_SV(GvCV(gv)) : MUTABLE_SV(gv)); |
5556 | RETURN; | |
5557 | } | |
5558 | ||
5559 | PP(pp_method_super) | |
5560 | { | |
5561 | dSP; | |
5562 | GV* gv; | |
5563 | HV* cache; | |
5564 | SV* const meth = cMETHOPx_meth(PL_op); | |
5565 | HV* const stash = CopSTASH(PL_curcop); | |
5566 | /* Actually, SUPER doesn't need real object's (or class') stash at all, | |
5567 | * as it uses CopSTASH. However, we must ensure that object(class) is | |
5568 | * correct (this check is done by S_opmethod_stash) */ | |
5569 | opmethod_stash(meth); | |
5570 | ||
5571 | if ((cache = HvMROMETA(stash)->super)) { | |
810bd8b7 | 5572 | METHOD_CHECK_CACHE(stash, cache, meth); |
5573 | } | |
5574 | ||
5575 | gv = gv_fetchmethod_sv_flags(stash, meth, GV_AUTOLOAD|GV_CROAK|GV_SUPER); | |
5576 | assert(gv); | |
5577 | ||
5578 | XPUSHs(isGV(gv) ? MUTABLE_SV(GvCV(gv)) : MUTABLE_SV(gv)); | |
5579 | RETURN; | |
5580 | } | |
5581 | ||
5582 | PP(pp_method_redir) | |
5583 | { | |
5584 | dSP; | |
5585 | GV* gv; | |
5586 | SV* const meth = cMETHOPx_meth(PL_op); | |
5587 | HV* stash = gv_stashsv(cMETHOPx_rclass(PL_op), 0); | |
5588 | opmethod_stash(meth); /* not used but needed for error checks */ | |
5589 | ||
5590 | if (stash) { METHOD_CHECK_CACHE(stash, stash, meth); } | |
5591 | else stash = MUTABLE_HV(cMETHOPx_rclass(PL_op)); | |
5592 | ||
5593 | gv = gv_fetchmethod_sv_flags(stash, meth, GV_AUTOLOAD|GV_CROAK); | |
5594 | assert(gv); | |
5595 | ||
5596 | XPUSHs(isGV(gv) ? MUTABLE_SV(GvCV(gv)) : MUTABLE_SV(gv)); | |
5597 | RETURN; | |
5598 | } | |
5599 | ||
5600 | PP(pp_method_redir_super) | |
5601 | { | |
5602 | dSP; | |
5603 | GV* gv; | |
5604 | HV* cache; | |
5605 | SV* const meth = cMETHOPx_meth(PL_op); | |
5606 | HV* stash = gv_stashsv(cMETHOPx_rclass(PL_op), 0); | |
5607 | opmethod_stash(meth); /* not used but needed for error checks */ | |
5608 | ||
5609 | if (UNLIKELY(!stash)) stash = MUTABLE_HV(cMETHOPx_rclass(PL_op)); | |
5610 | else if ((cache = HvMROMETA(stash)->super)) { | |
5611 | METHOD_CHECK_CACHE(stash, cache, meth); | |
7d6c333c | 5612 | } |
5613 | ||
5614 | gv = gv_fetchmethod_sv_flags(stash, meth, GV_AUTOLOAD|GV_CROAK|GV_SUPER); | |
5615 | assert(gv); | |
5616 | ||
5617 | XPUSHs(isGV(gv) ? MUTABLE_SV(GvCV(gv)) : MUTABLE_SV(gv)); | |
5618 | RETURN; | |
a0d0e21e | 5619 | } |
241d1a3b NC |
5620 | |
5621 | /* | |
14d04a33 | 5622 | * ex: set ts=8 sts=4 sw=4 et: |
37442d52 | 5623 | */ |