#define PERL_IN_OP_C
#include "perl.h"
#include "keywords.h"
+#include "feature.h"
#define CALL_PEEP(o) PL_peepp(aTHX_ o)
#define CALL_RPEEP(o) PL_rpeepp(aTHX_ o)
o->op_ppaddr = PL_ppaddr[type]; \
} STMT_END
-STATIC const char*
+STATIC SV*
S_gv_ename(pTHX_ GV *gv)
{
SV* const tmpsv = sv_newmortal();
PERL_ARGS_ASSERT_GV_ENAME;
gv_efullname3(tmpsv, gv, NULL);
- return SvPV_nolen_const(tmpsv);
+ return tmpsv;
}
STATIC OP *
}
STATIC OP *
-S_too_few_arguments(pTHX_ OP *o, const char *name)
+S_too_few_arguments_sv(pTHX_ OP *o, SV *namesv, U32 flags)
{
- PERL_ARGS_ASSERT_TOO_FEW_ARGUMENTS;
+ PERL_ARGS_ASSERT_TOO_FEW_ARGUMENTS_SV;
+ yyerror_pv(Perl_form(aTHX_ "Not enough arguments for %"SVf, namesv),
+ SvUTF8(namesv) | flags);
+ return o;
+}
- yyerror(Perl_form(aTHX_ "Not enough arguments for %s", name));
+STATIC OP *
+S_too_few_arguments_pv(pTHX_ OP *o, const char* name, U32 flags)
+{
+ PERL_ARGS_ASSERT_TOO_FEW_ARGUMENTS_PV;
+ yyerror_pv(Perl_form(aTHX_ "Not enough arguments for %s", name), flags);
+ return o;
+}
+
+STATIC OP *
+S_too_many_arguments_pv(pTHX_ OP *o, const char *name, U32 flags)
+{
+ PERL_ARGS_ASSERT_TOO_MANY_ARGUMENTS_PV;
+
+ yyerror_pv(Perl_form(aTHX_ "Too many arguments for %s", name), flags);
return o;
}
STATIC OP *
-S_too_many_arguments(pTHX_ OP *o, const char *name)
+S_too_many_arguments_sv(pTHX_ OP *o, SV *namesv, U32 flags)
{
- PERL_ARGS_ASSERT_TOO_MANY_ARGUMENTS;
+ PERL_ARGS_ASSERT_TOO_MANY_ARGUMENTS_SV;
- yyerror(Perl_form(aTHX_ "Too many arguments for %s", name));
+ yyerror_pv(Perl_form(aTHX_ "Too many arguments for %"SVf, SVfARG(namesv)),
+ SvUTF8(namesv) | flags);
return o;
}
STATIC void
-S_bad_type(pTHX_ I32 n, const char *t, const char *name, const OP *kid)
+S_bad_type_pv(pTHX_ I32 n, const char *t, const char *name, U32 flags, const OP *kid)
{
- PERL_ARGS_ASSERT_BAD_TYPE;
+ PERL_ARGS_ASSERT_BAD_TYPE_PV;
+
+ yyerror_pv(Perl_form(aTHX_ "Type of arg %d to %s must be %s (not %s)",
+ (int)n, name, t, OP_DESC(kid)), flags);
+}
- yyerror(Perl_form(aTHX_ "Type of arg %d to %s must be %s (not %s)",
- (int)n, name, t, OP_DESC(kid)));
+STATIC void
+S_bad_type_sv(pTHX_ I32 n, const char *t, SV *namesv, U32 flags, const OP *kid)
+{
+ PERL_ARGS_ASSERT_BAD_TYPE_SV;
+
+ yyerror_pv(Perl_form(aTHX_ "Type of arg %d to %"SVf" must be %s (not %s)",
+ (int)n, SVfARG(namesv), t, OP_DESC(kid)), SvUTF8(namesv) | flags);
}
STATIC void
if (len &&
!(is_our ||
isALPHA(name[1]) ||
- ((flags & SVf_UTF8) && UTF8_IS_START(name[1])) ||
+ ((flags & SVf_UTF8) && isIDFIRST_utf8((U8 *)name+1)) ||
(name[1] == '_' && (*name == '$' || len > 2))))
{
/* name[2] is true if strlen(name) > 2 */
- if (!isPRINT(name[1]) || strchr("\t\n\r\f", name[1])) {
+ if (!(flags & SVf_UTF8 && UTF8_IS_START(name[1]))
+ && (!isPRINT(name[1]) || strchr("\t\n\r\f", name[1]))) {
yyerror(Perl_form(aTHX_ "Can't use global %c^%c%.*s in \"%s\"",
name[0], toCTRL(name[1]), (int)(len - 2), name + 2,
PL_parser->in_my == KEY_state ? "state" : "my"));
} else {
- yyerror(Perl_form(aTHX_ "Can't use global %.*s in \"%s\"", (int) len, name,
- PL_parser->in_my == KEY_state ? "state" : "my"));
+ yyerror_pv(Perl_form(aTHX_ "Can't use global %.*s in \"%s\"", (int) len, name,
+ PL_parser->in_my == KEY_state ? "state" : "my"), flags & SVf_UTF8);
}
}
PERL_ARGS_ASSERT_FORGET_PMOP;
- if (pmstash && !SvIS_FREED(pmstash)) {
+ if (pmstash && !SvIS_FREED(pmstash) && SvMAGICAL(pmstash)) {
MAGIC * const mg = mg_find((const SV *)pmstash, PERL_MAGIC_symtab);
if (mg) {
PMOP **const array = (PMOP**) mg->mg_ptr;
case G_ARRAY: return list(o);
case G_VOID: return scalarvoid(o);
default:
- Perl_croak(aTHX_ "panic: op_contextualize bad context");
+ Perl_croak(aTHX_ "panic: op_contextualize bad context %ld",
+ (long) context);
return o;
}
}
case OP_GGRGID:
case OP_GETLOGIN:
case OP_PROTOTYPE:
+ case OP_RUNCV:
func_ops:
if (!(o->op_private & (OPpLVAL_INTRO|OPpOUR_INTRO)))
/* Otherwise it's "Useless use of grep iterator" */
no_bareword_allowed(o);
else {
if (ckWARN(WARN_VOID)) {
- if (SvOK(sv)) {
- SV* msv = sv_2mortal(Perl_newSVpvf(aTHX_
- "a constant (%"SVf")", sv));
- useless = SvPV_nolen(msv);
- useless_is_utf8 = SvUTF8(msv);
- }
- else
- useless = "a constant (undef)";
/* don't warn on optimised away booleans, eg
* use constant Foo, 5; Foo || print; */
if (cSVOPo->op_private & OPpCONST_SHORTCIRCUIT)
strnEQ(maybe_macro, "ds", 2) ||
strnEQ(maybe_macro, "ig", 2))
useless = NULL;
+ else {
+ SV * const dsv = newSVpvs("");
+ SV* msv = sv_2mortal(Perl_newSVpvf(aTHX_
+ "a constant (%s)",
+ pv_pretty(dsv, maybe_macro, SvCUR(sv), 32, NULL, NULL,
+ PERL_PV_PRETTY_DUMP | PERL_PV_ESCAPE_NOCLEAR | PERL_PV_ESCAPE_UNI_DETECT )));
+ SvREFCNT_dec(dsv);
+ useless = SvPV_nolen(msv);
+ useless_is_utf8 = SvUTF8(msv);
+ }
+ }
+ else if (SvOK(sv)) {
+ SV* msv = sv_2mortal(Perl_newSVpvf(aTHX_
+ "a constant (%"SVf")", sv));
+ useless = SvPV_nolen(msv);
}
+ else
+ useless = "a constant (undef)";
}
}
op_null(o); /* don't execute or even remember it */
key = SvPV_const(*svp, keylen);
if (!hv_fetch(GvHV(*fields), key,
SvUTF8(*svp) ? -(I32)keylen : (I32)keylen, FALSE)) {
- Perl_croak(aTHX_ "No such class field \"%s\" "
- "in variable %s of type %s",
- key, SvPV_nolen_const(lexname), HvNAME_get(SvSTASH(lexname)));
+ Perl_croak(aTHX_ "No such class field \"%"SVf"\" "
+ "in variable %"SVf" of type %"HEKf,
+ SVfARG(*svp), SVfARG(lexname),
+ HEKfARG(HvNAME_HEK(SvSTASH(lexname))));
}
break;
}
key = SvPV_const(*svp, keylen);
if (!hv_fetch(GvHV(*fields), key,
SvUTF8(*svp) ? -(I32)keylen : (I32)keylen, FALSE)) {
- Perl_croak(aTHX_ "No such class field \"%s\" "
- "in variable %s of type %s",
- key, SvPV_nolen(lexname), HvNAME_get(SvSTASH(lexname)));
+ Perl_croak(aTHX_ "No such class field \"%"SVf"\" "
+ "in variable %"SVf" of type %"HEKf,
+ SVfARG(*svp), SVfARG(lexname),
+ HEKfARG(HvNAME_HEK(SvSTASH(lexname))));
}
}
break;
assert( (o->op_flags & OPf_WANT) != OPf_WANT_VOID );
+ if (type == OP_PRTF || type == OP_SPRINTF) type = OP_ENTERSUB;
+
switch (o->op_type) {
case OP_UNDEF:
- localize = 0;
PL_modcount++;
return o;
case OP_STUB:
|(OPpENTERSUB_INARGS * (type == OP_LEAVESUBLV));
PL_modcount = RETURN_UNLIMITED_NUMBER;
if (type == OP_GREPSTART || type == OP_ENTERSUB || type == OP_REFGEN) {
- /* Backward compatibility mode: */
+ /* Potential lvalue context: */
o->op_private |= OPpENTERSUB_INARGS;
break;
}
else { /* Compile-time error message: */
OP *kid = cUNOPo->op_first;
CV *cv;
- OP *okid;
if (kid->op_type != OP_PUSHMARK) {
if (kid->op_type != OP_NULL || kid->op_targ != OP_LIST)
while (kid->op_sibling)
kid = kid->op_sibling;
if (!(kid->op_type == OP_NULL && kid->op_targ == OP_RV2CV)) {
- /* Indirect call */
- if (kid->op_type == OP_METHOD_NAMED
- || kid->op_type == OP_METHOD)
- {
- UNOP *newop;
-
- NewOp(1101, newop, 1, UNOP);
- newop->op_type = OP_RV2CV;
- newop->op_ppaddr = PL_ppaddr[OP_RV2CV];
- newop->op_first = NULL;
- newop->op_next = (OP*)newop;
- kid->op_sibling = (OP*)newop;
- newop->op_private |= OPpLVAL_INTRO;
- newop->op_private &= ~1;
- break;
- }
-
- if (kid->op_type != OP_RV2CV)
- Perl_croak(aTHX_
- "panic: unexpected lvalue entersub "
- "entry via type/targ %ld:%"UVuf,
- (long)kid->op_type, (UV)kid->op_targ);
- kid->op_private |= OPpLVAL_INTRO;
break; /* Postpone until runtime */
}
- okid = kid;
kid = kUNOP->op_first;
if (kid->op_type == OP_NULL && kid->op_targ == OP_RV2SV)
kid = kUNOP->op_first;
"entry via type/targ %ld:%"UVuf,
(long)kid->op_type, (UV)kid->op_targ);
if (kid->op_type != OP_GV) {
- /* Restore RV2CV to check lvalueness */
- restore_2cv:
- if (kid->op_next && kid->op_next != kid) { /* Happens? */
- okid->op_next = kid->op_next;
- kid->op_next = okid;
- }
- else
- okid->op_next = NULL;
- okid->op_type = OP_RV2CV;
- okid->op_targ = 0;
- okid->op_ppaddr = PL_ppaddr[OP_RV2CV];
- okid->op_private |= OPpLVAL_INTRO;
- okid->op_private &= ~1;
break;
}
cv = GvCV(kGVOP_gv);
if (!cv)
- goto restore_2cv;
+ break;
if (CvLVALUE(cv))
break;
}
if (type != OP_LEAVESUBLV)
goto nomod;
break; /* op_lvalue()ing was handled by ck_return() */
+
+ case OP_COREARGS:
+ return o;
}
/* [20011101.069] File test operators interpret OPf_REF to mean that
STATIC bool
S_scalar_mod_type(const OP *o, I32 type)
{
- assert(o || type != OP_SASSIGN);
-
switch (type) {
+ case OP_POS:
case OP_SASSIGN:
- if (o->op_type == OP_RV2GV)
+ if (o && o->op_type == OP_RV2GV)
return FALSE;
/* FALL THROUGH */
case OP_PREINC:
OP *kid;
for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
my_kid(kid, attrs, imopsp);
+ return o;
} else if (type == OP_UNDEF
#ifdef PERL_MAD
|| type == OP_STUB
&& (gv = cGVOPx_gv(cUNOPx(left)->op_first))
? varname(gv, isary ? '@' : '%', 0, NULL, 0, 1)
: NULL
- : varname(NULL, isary ? '@' : '%', left->op_targ, NULL, 0, 1);
+ : varname(
+ (GV *)PL_compcv, isary ? '@' : '%', left->op_targ, NULL, 0, 1
+ );
if (name)
Perl_warner(aTHX_ packWARN(WARN_MISC),
"Applying %s to %"SVf" will act on scalar(%"SVf")",
if (PL_in_eval) {
PERL_CONTEXT *cx;
+ I32 i;
if (PL_eval_root)
return;
PL_eval_root = newUNOP(OP_LEAVEEVAL,
PL_eval_root->op_private |= OPpREFCOUNTED;
OpREFCNT_set(PL_eval_root, 1);
PL_eval_root->op_next = 0;
+ i = PL_savestack_ix;
+ SAVEFREEOP(o);
+ ENTER;
CALL_PEEP(PL_eval_start);
finalize_optree(PL_eval_root);
-
+ LEAVE;
+ PL_savestack_ix = i;
}
else {
if (o->op_type == OP_STUB) {
case OP_SCMP:
case OP_SPRINTF:
/* XXX what about the numeric ops? */
- if (PL_hints & HINT_LOCALE)
+ if (IN_LOCALE_COMPILETIME)
goto nope;
break;
}
else
bits = 8;
- PerlMemShared_free(cPVOPo->op_pv);
- cPVOPo->op_pv = NULL;
-
swash = MUTABLE_SV(swash_init("utf8", "", listsv, bits, none));
#ifdef USE_ITHREADS
cPADOPo->op_padix = pad_alloc(OP_TRANS, SVs_PADTMP);
return o;
}
- tbl = (short*)cPVOPo->op_pv;
+ tbl = (short*)PerlMemShared_calloc(
+ (o->op_private & OPpTRANS_COMPLEMENT) &&
+ !(o->op_private & OPpTRANS_DELETE) ? 258 : 256,
+ sizeof(short));
+ cPVOPo->op_pv = (char*)tbl;
if (complement) {
- Zero(tbl, 256, short);
for (i = 0; i < (I32)tlen; i++)
tbl[t[i]] = -1;
for (i = 0, j = 0; i < 256; i++) {
if (PL_hints & HINT_RE_TAINT)
pmop->op_pmflags |= PMf_RETAINT;
- if (PL_hints & HINT_LOCALE) {
+ if (IN_LOCALE_COMPILETIME) {
set_regex_charset(&(pmop->op_pmflags), REGEX_LOCALE_CHARSET);
}
- else if ((! (PL_hints & HINT_BYTES)) && (PL_hints & HINT_UNI_8_BIT)) {
+ else if ((! (PL_hints & HINT_BYTES))
+ /* Both UNI_8_BIT and locale :not_characters imply Unicode */
+ && (PL_hints & (HINT_UNI_8_BIT|HINT_LOCALE_NOT_CHARS)))
+ {
set_regex_charset(&(pmop->op_pmflags), REGEX_UNICODE_CHARSET);
}
if (PL_hints & HINT_RE_FLAGS) {
Perl_newPVOP(pTHX_ I32 type, I32 flags, char *pv)
{
dVAR;
+ const bool utf8 = cBOOL(flags & SVf_UTF8);
PVOP *pvop;
+ flags &= ~SVf_UTF8;
+
assert((PL_opargs[type] & OA_CLASS_MASK) == OA_PVOP_OR_SVOP
+ || type == OP_RUNCV
|| (PL_opargs[type] & OA_CLASS_MASK) == OA_LOOPEXOP);
NewOp(1101, pvop, 1, PVOP);
pvop->op_pv = pv;
pvop->op_next = (OP*)pvop;
pvop->op_flags = (U8)flags;
+ pvop->op_private = utf8 ? OPpPV_IS_UTF8 : 0;
if (PL_opargs[type] & OA_RETSCALAR)
scalar((OP*)pvop);
if (PL_opargs[type] & OA_TARGET)
newSTATEOP(0, NULL, imop) ));
if (use_version) {
- /* If we request a version >= 5.9.5, load feature.pm with the
+ /* Enable the
* feature bundle that corresponds to the required version. */
use_version = sv_2mortal(new_version(use_version));
+ S_enable_feature_bundle(aTHX_ use_version);
- if (vcmp(use_version,
- sv_2mortal(upg_version(newSVnv(5.009005), FALSE))) >= 0) {
- SV *const importsv = vnormal(use_version);
- *SvPVX_mutable(importsv) = ':';
- ENTER_with_name("load_feature");
- Perl_load_module(aTHX_ 0, newSVpvs("feature"), NULL, importsv, NULL);
- LEAVE_with_name("load_feature");
- }
/* If a version >= 5.11.0 is requested, strictures are on by default! */
if (vcmp(use_version,
sv_2mortal(upg_version(newSVnv(5.011000), FALSE))) >= 0) {
- PL_hints |= (HINT_STRICT_REFS | HINT_STRICT_SUBS | HINT_STRICT_VARS);
+ if (!(PL_hints & HINT_EXPLICIT_STRICT_REFS))
+ PL_hints |= HINT_STRICT_REFS;
+ if (!(PL_hints & HINT_EXPLICIT_STRICT_SUBS))
+ PL_hints |= HINT_STRICT_SUBS;
+ if (!(PL_hints & HINT_EXPLICIT_STRICT_VARS))
+ PL_hints |= HINT_STRICT_VARS;
+ }
+ /* otherwise they are off */
+ else {
+ if (!(PL_hints & HINT_EXPLICIT_STRICT_REFS))
+ PL_hints &= ~HINT_STRICT_REFS;
+ if (!(PL_hints & HINT_EXPLICIT_STRICT_SUBS))
+ PL_hints &= ~HINT_STRICT_SUBS;
+ if (!(PL_hints & HINT_EXPLICIT_STRICT_VARS))
+ PL_hints &= ~HINT_STRICT_VARS;
}
}
Note that the actual module name, not its filename, should be given.
Eg, "Foo::Bar" instead of "Foo/Bar.pm". flags can be any of
PERL_LOADMOD_DENY, PERL_LOADMOD_NOIMPORT, or PERL_LOADMOD_IMPORT_OPS
-(or 0 for no flags). ver, if specified, provides version semantics
+(or 0 for no flags). ver, if specified and not NULL, provides version semantics
similar to C<use Foo::Bar VERSION>. The optional trailing SV*
arguments can be used to specify arguments to the module's import()
method, similar to C<use Foo::Bar VERSION LIST>. They must be
Otherwise at least a single NULL pointer to designate the default
import list is required.
+The reference count for each specified C<SV*> parameter is decremented.
+
=cut */
void
}
if (gv && GvCVu(gv) && GvIMPORTED_CV(gv)) {
- doop = ck_subr(newUNOP(OP_ENTERSUB, OPf_STACKED,
+ doop = newUNOP(OP_ENTERSUB, OPf_STACKED,
op_append_elem(OP_LIST, term,
scalar(newUNOP(OP_RV2CV, 0,
- newGVOP(OP_GV, 0, gv))))));
+ newGVOP(OP_GV, 0, gv)))));
}
else {
doop = newUNOP(OP_DOFILE, 0, scalar(term));
{
dVAR;
const U32 seq = intro_my();
+ const U32 utf8 = flags & SVf_UTF8;
register COP *cop;
+ flags &= ~SVf_UTF8;
+
NewOp(1101, cop, 1, COP);
if (PERLDB_LINE && CopLINE(PL_curcop) && PL_curstash != PL_debstash) {
cop->op_type = OP_DBSTATE;
cop->cop_warnings = DUP_WARNINGS(PL_curcop->cop_warnings);
CopHINTHASH_set(cop, cophh_copy(CopHINTHASH_get(PL_curcop)));
if (label) {
- Perl_cop_store_label(aTHX_ cop, label, strlen(label), 0);
-
+ Perl_cop_store_label(aTHX_ cop, label, strlen(label), utf8);
+
PL_hints |= HINT_BLOCK_SCOPE;
/* It seems that we need to defer freeing this pointer, as other parts
of the grammar end up wanting to copy it after this op has been
if (expr->op_type == OP_READLINE
|| expr->op_type == OP_READDIR
|| expr->op_type == OP_GLOB
+ || expr->op_type == OP_EACH || expr->op_type == OP_AEACH
|| (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB)) {
expr = newUNOP(OP_DEFINED, 0,
newASSIGNOP(0, newDEFSVOP(), 0, expr) );
if (expr->op_type == OP_READLINE
|| expr->op_type == OP_READDIR
|| expr->op_type == OP_GLOB
+ || expr->op_type == OP_EACH || expr->op_type == OP_AEACH
|| (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB)) {
expr = newUNOP(OP_DEFINED, 0,
newASSIGNOP(0, newDEFSVOP(), 0, expr) );
assert((PL_opargs[type] & OA_CLASS_MASK) == OA_LOOPEXOP);
- if (type != OP_GOTO || label->op_type == OP_CONST) {
+ if (type != OP_GOTO) {
/* "last()" means "last" */
if (label->op_type == OP_STUB && (label->op_flags & OPf_PARENS))
o = newOP(type, OPf_SPECIAL);
else {
- o = newPVOP(type, 0, savesharedpv(label->op_type == OP_CONST
- ? SvPV_nolen_const(((SVOP*)label)->op_sv)
- : ""));
+ const_label:
+ o = newPVOP(type,
+ label->op_type == OP_CONST
+ ? SvUTF8(((SVOP*)label)->op_sv)
+ : 0,
+ savesharedpv(label->op_type == OP_CONST
+ ? SvPV_nolen_const(((SVOP*)label)->op_sv)
+ : ""));
}
#ifdef PERL_MAD
op_getmad(label,o,'L');
if (label->op_type == OP_ENTERSUB
&& !(label->op_flags & OPf_STACKED))
label = newUNOP(OP_REFGEN, 0, op_lvalue(label, OP_REFGEN));
+ else if (label->op_type == OP_CONST) {
+ SV * const sv = ((SVOP *)label)->op_sv;
+ STRLEN l;
+ const char *s = SvPV_const(sv,l);
+ if (l == strlen(s)) goto const_label;
+ }
o = newUNOP(type, OPf_STACKED, label);
}
PL_hints |= HINT_BLOCK_SCOPE;
/* This is a default {} block */
enterop->op_first = block;
enterop->op_flags |= OPf_SPECIAL;
+ o ->op_flags |= OPf_SPECIAL;
o->op_next = (OP *) enterop;
}
CV *
Perl_newATTRSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block)
{
+ return newATTRSUB_flags(floor, o, proto, attrs, block, 0);
+}
+
+CV *
+Perl_newATTRSUB_flags(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs,
+ OP *block, U32 flags)
+{
dVAR;
GV *gv;
const char *ps;
|| PL_madskills)
? GV_ADDMULTI : GV_ADDMULTI | GV_NOINIT;
STRLEN namlen = 0;
- const char * const name = o ? SvPV_const(cSVOPo->op_sv, namlen) : NULL;
+ const bool o_is_gv = flags & 1;
+ const char * const name =
+ o ? SvPV_const(o_is_gv ? (SV *)o : cSVOPo->op_sv, namlen) : NULL;
bool has_name;
- bool name_is_utf8 = o ? (SvUTF8(cSVOPo->op_sv) ? 1 : 0) : 0;
+ bool name_is_utf8 = o && !o_is_gv && SvUTF8(cSVOPo->op_sv);
if (proto) {
assert(proto->op_type == OP_CONST);
else
ps = NULL;
- if (name) {
+ if (o_is_gv) {
+ gv = (GV*)o;
+ o = NULL;
+ has_name = TRUE;
+ } else if (name) {
gv = gv_fetchsv(cSVOPo->op_sv, gv_fetch_flags, SVt_PVCV);
has_name = TRUE;
} else if (PERLDB_NAMEANON && CopLINE(PL_curcop)) {
} else if (*name == 'C') {
if (strEQ(name, "CHECK")) {
if (PL_main_start)
+ /* diag_listed_as: Too late to run %s block */
Perl_ck_warner(aTHX_ packWARN(WARN_VOID),
"Too late to run CHECK block");
Perl_av_create_and_unshift_one(aTHX_ &PL_checkav, MUTABLE_SV(cv));
} else if (*name == 'I') {
if (strEQ(name, "INIT")) {
if (PL_main_start)
+ /* diag_listed_as: Too late to run %s block */
Perl_ck_warner(aTHX_ packWARN(WARN_VOID),
"Too late to run INIT block");
Perl_av_create_and_push(aTHX_ &PL_initav, MUTABLE_SV(cv));
}
else if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
/* already defined (or promised) */
- /* Reduntant check that allows us to avoid creating an SV
+ /* Redundant check that allows us to avoid creating an SV
most of the time: */
if (CvCONST(cv) || ckWARN(WARN_REDEFINE)) {
const line_t oldline = CopLINE(PL_curcop);
Perl_newXS(pTHX_ const char *name, XSUBADDR_t subaddr, const char *filename)
{
PERL_ARGS_ASSERT_NEWXS;
- return newXS_flags(name, subaddr, filename, NULL, 0);
+ return newXS_len_flags(
+ name, name ? strlen(name) : 0, subaddr, filename, NULL, NULL, 0
+ );
}
#ifdef PERL_MAD
Perl_warner(aTHX_ packWARN(WARN_REDEFINE),
"Format %"SVf" redefined", SVfARG(cSVOPo->op_sv));
} else {
+ /* diag_listed_as: Format %s redefined */
Perl_warner(aTHX_ packWARN(WARN_REDEFINE),
"Format STDOUT redefined");
}
if (ckWARN(WARN_SYNTAX)) {
const OP *kid = cUNOPo->op_first;
if (kid && (
- is_dollar_bracket(aTHX_ kid)
- || ((kid = kid->op_sibling) && is_dollar_bracket(aTHX_ kid))
+ (
+ is_dollar_bracket(aTHX_ kid)
+ && kid->op_sibling && kid->op_sibling->op_type == OP_CONST
+ )
+ || ( kid->op_type == OP_CONST
+ && (kid = kid->op_sibling) && is_dollar_bracket(aTHX_ kid))
))
Perl_warner(aTHX_ packWARN(WARN_SYNTAX),
"$[ used in %s (did you mean $] ?)", OP_DESC(o));
PERL_ARGS_ASSERT_CK_EOF;
if (o->op_flags & OPf_KIDS) {
+ OP *kid;
if (cLISTOPo->op_first->op_type == OP_STUB) {
OP * const newop
= newUNOP(o->op_type, OPf_SPECIAL, newGVOP(OP_GV, 0, PL_argvgv));
#endif
o = newop;
}
- return ck_fun(o);
+ o = ck_fun(o);
+ kid = cLISTOPo->op_first;
+ if (kid->op_type == OP_RV2GV)
+ kid->op_private |= OPpALLOW_FAKE;
}
return o;
}
op_getmad(oldo,o,'O');
}
o->op_targ = (PADOFFSET)PL_hints;
+ if (o->op_private & OPpEVAL_BYTES) o->op_targ &= ~HINT_UTF8;
if ((PL_hints & HINT_LOCALIZE_HH) != 0
&& !(o->op_private & OPpEVAL_COPHH) && GvHV(PL_hintgv)) {
/* Store a copy of %^H that pp_entereval can pick up. */
MUTABLE_SV(hv_copy_hints_hv(GvHV(PL_hintgv))));
cUNOPo->op_first->op_sibling = hhop;
o->op_private |= OPpEVAL_HAS_HH;
-
- if (!(o->op_private & OPpEVAL_BYTES)
- && FEATURE_IS_ENABLED("unieval"))
- o->op_private |= OPpEVAL_UNICODE;
}
+ if (!(o->op_private & OPpEVAL_BYTES)
+ && FEATURE_UNIEVAL_IS_ENABLED)
+ o->op_private |= OPpEVAL_UNICODE;
return o;
}
&& kidtype != OP_STAT && kidtype != OP_LSTAT) {
o->op_private |= OPpFT_STACKED;
kid->op_private |= OPpFT_STACKING;
+ if (kidtype == OP_FTTTY && (
+ !(kid->op_private & OPpFT_STACKED)
+ || kid->op_private & OPpFT_AFTER_t
+ ))
+ o->op_private |= OPpFT_AFTER_t;
}
}
else {
if (numargs == 1 && !(oa >> 4)
&& kid->op_type == OP_LIST && type != OP_SCALAR)
{
- return too_many_arguments(o,PL_op_desc[type]);
+ return too_many_arguments_pv(o,PL_op_desc[type], 0);
}
scalar(kid);
break;
&& ( !SvROK(cSVOPx_sv(kid))
|| SvTYPE(SvRV(cSVOPx_sv(kid))) != SVt_PVAV )
)
- bad_type(numargs, "array", PL_op_desc[type], kid);
+ bad_type_pv(numargs, "array", PL_op_desc[type], 0, kid);
/* Defer checks to run-time if we have a scalar arg */
if (kid->op_type == OP_RV2AV || kid->op_type == OP_PADAV)
op_lvalue(kid, type);
*tokid = kid;
}
else if (kid->op_type != OP_RV2HV && kid->op_type != OP_PADHV)
- bad_type(numargs, "hash", PL_op_desc[type], kid);
+ bad_type_pv(numargs, "hash", PL_op_desc[type], 0, kid);
op_lvalue(kid, type);
break;
case OA_CVREF:
}
else if (kid->op_type == OP_READLINE) {
/* neophyte patrol: open(<FH>), close(<FH>) etc. */
- bad_type(numargs, "HANDLE", OP_DESC(o), kid);
+ bad_type_pv(numargs, "HANDLE", OP_DESC(o), 0, kid);
}
else {
I32 flags = OPf_SPECIAL;
const char *name = NULL;
STRLEN len = 0;
U32 name_utf8 = 0;
+ bool want_dollar = TRUE;
flags = 0;
/* Set a flag to tell rv2gv to vivify
if (!name) {
name = "__ANONIO__";
len = 10;
+ want_dollar = FALSE;
}
op_lvalue(kid, type);
}
targ = pad_alloc(OP_RV2GV, SVs_PADTMP);
namesv = PAD_SVl(targ);
SvUPGRADE(namesv, SVt_PV);
- if (*name != '$')
+ if (want_dollar && *name != '$')
sv_setpvs(namesv, "$");
sv_catpvn(namesv, name, len);
if ( name_utf8 ) SvUTF8_on(namesv);
scalar(kid);
break;
case OA_SCALARREF:
+ if ((type == OP_UNDEF || type == OP_POS)
+ && numargs == 1 && !(oa >> 4)
+ && kid->op_type == OP_LIST)
+ return too_many_arguments_pv(o,PL_op_desc[type], 0);
op_lvalue(scalar(kid), type);
break;
}
}
#ifdef PERL_MAD
if (kid && kid->op_type != OP_STUB)
- return too_many_arguments(o,OP_DESC(o));
+ return too_many_arguments_pv(o,OP_DESC(o), 0);
o->op_private |= numargs;
#else
/* FIXME - should the numargs move as for the PERL_MAD case? */
o->op_private |= numargs;
if (kid)
- return too_many_arguments(o,OP_DESC(o));
+ return too_many_arguments_pv(o,OP_DESC(o), 0);
#endif
listkids(o);
}
while (oa & OA_OPTIONAL)
oa >>= 4;
if (oa && oa != OA_LIST)
- return too_few_arguments(o,OP_DESC(o));
+ return too_few_arguments_pv(o,OP_DESC(o), 0);
}
return o;
}
else if (!((gv = gv_fetchpvs("glob", GV_NOTQUAL, SVt_PVCV))
&& GvCVu(gv) && GvIMPORTED_CV(gv)))
{
- gv = gv_fetchpvs("CORE::GLOBAL::glob", 0, SVt_PVCV);
+ GV * const * const gvp =
+ (GV **)hv_fetchs(PL_globalstash, "glob", FALSE);
+ gv = gvp ? *gvp : NULL;
}
-#if !defined(PERL_EXTERNAL_GLOB)
- if (!(gv && GvCVu(gv) && GvIMPORTED_CV(gv))) {
- ENTER;
- Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT,
- newSVpvs("File::Glob"), NULL, NULL, NULL);
- LEAVE;
- }
-#endif /* !PERL_EXTERNAL_GLOB */
-
if (gv && GvCVu(gv) && GvIMPORTED_CV(gv)) {
/* convert
* glob
op_append_elem(OP_LIST, o,
scalar(newUNOP(OP_RV2CV, 0,
newGVOP(OP_GV, 0, gv)))));
- o = newUNOP(OP_NULL, 0, ck_subr(o));
+ o = newUNOP(OP_NULL, 0, o);
o->op_targ = OP_GLOB; /* hint at what it used to be: eg in newWHILEOP */
return o;
}
else o->op_flags &= ~OPf_SPECIAL;
+#if !defined(PERL_EXTERNAL_GLOB)
+ if (!PL_globhook) {
+ ENTER;
+ Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT,
+ newSVpvs("File::Glob"), NULL, NULL, NULL);
+ LEAVE;
+ }
+#endif /* !PERL_EXTERNAL_GLOB */
gv = newGVgen("main");
gv_IOadd(gv);
#ifndef PERL_EXTERNAL_GLOB
return o;
kid = cLISTOPo->op_first->op_sibling;
if (kid->op_type != OP_NULL)
- Perl_croak(aTHX_ "panic: ck_grep");
+ Perl_croak(aTHX_ "panic: ck_grep, type=%u", (unsigned) kid->op_type);
kid = kUNOP->op_first;
if (!gwop)
kid = cLISTOPo->op_first->op_sibling;
if (!kid || !kid->op_sibling)
- return too_few_arguments(o,OP_DESC(o));
+ return too_few_arguments_pv(o,OP_DESC(o), 0);
for (kid = kid->op_sibling; kid; kid = kid->op_sibling)
op_lvalue(kid, OP_GREPSTART);
if ((o->op_flags & OPf_KIDS)) {
switch (cUNOPo->op_first->op_type) {
case OP_RV2AV:
- /* This is needed for
- if (defined %stash::)
- to work. Do not break Tk.
- */
- break; /* Globals via GV can be undef */
case OP_PADAV:
case OP_AASSIGN: /* Is this a good idea? */
Perl_ck_warner_d(aTHX_ packWARN(WARN_DEPRECATED),
{
PERL_ARGS_ASSERT_CK_READLINE;
- if (!(o->op_flags & OPf_KIDS)) {
+ if (o->op_flags & OPf_KIDS) {
+ OP *kid = cLISTOPo->op_first;
+ if (kid->op_type == OP_RV2GV) kid->op_private |= OPpALLOW_FAKE;
+ }
+ else {
OP * const newop
= newUNOP(OP_READLINE, 0, newGVOP(OP_GV, 0, PL_argvgv));
#ifdef PERL_MAD
if (!kid)
op_append_elem(o->op_type, o, newDEFSVOP());
+ if (o->op_type == OP_PRTF) return modkids(listkids(o), OP_PRTF);
return listkids(o);
}
#ifndef PERL_MAD
op_free(o);
#endif
- newop = ck_subr(newUNOP(OP_ENTERSUB, OPf_STACKED,
+ newop = newUNOP(OP_ENTERSUB, OPf_STACKED,
op_append_elem(OP_LIST, kid,
scalar(newUNOP(OP_RV2CV, 0,
newGVOP(OP_GV, 0,
- gv))))));
+ gv)))));
op_getmad(o,newop,'O');
return newop;
}
kid->op_next = k;
o->op_flags |= OPf_SPECIAL;
}
- else if (kid->op_type == OP_RV2SV || kid->op_type == OP_PADSV)
- op_null(firstkid);
firstkid = firstkid->op_sibling;
}
kid = cLISTOPo->op_first;
if (kid->op_type != OP_NULL)
- Perl_croak(aTHX_ "panic: ck_split");
+ Perl_croak(aTHX_ "panic: ck_split, type=%u", (unsigned) kid->op_type);
kid = kid->op_sibling;
op_free(cLISTOPo->op_first);
if (kid)
scalar(kid);
if (kid->op_sibling)
- return too_many_arguments(o,OP_DESC(o));
+ return too_many_arguments_pv(o,OP_DESC(o), 0);
return o;
}
if (kid && kid->op_type == OP_MATCH) {
if (ckWARN(WARN_SYNTAX)) {
const REGEXP *re = PM_GETRE(kPMOP);
- const char *pmstr = re ? RX_PRECOMP_const(re) : "STRING";
- const STRLEN len = re ? RX_PRELEN(re) : 6;
+ const SV *msg = re
+ ? newSVpvn_flags( RX_PRECOMP_const(re), RX_PRELEN(re),
+ SVs_TEMP | ( RX_UTF8(re) ? SVf_UTF8 : 0 ) )
+ : newSVpvs_flags( "STRING", SVs_TEMP );
Perl_warner(aTHX_ packWARN(WARN_SYNTAX),
- "/%.*s/ should probably be written as \"%.*s\"",
- (int)len, pmstr, (int)len, pmstr);
+ "/%"SVf"/ should probably be written as \"%"SVf"\"",
+ SVfARG(msg), SVfARG(msg));
}
}
return ck_fun(o);
const char *e = NULL;
PERL_ARGS_ASSERT_CK_ENTERSUB_ARGS_PROTO;
if (SvTYPE(protosv) == SVt_PVCV ? !SvPOK(protosv) : !SvOK(protosv))
- Perl_croak(aTHX_ "panic: ck_entersub_args_proto CV with no proto");
+ Perl_croak(aTHX_ "panic: ck_entersub_args_proto CV with no proto, "
+ "flags=%lx", (unsigned long) SvFLAGS(protosv));
if (SvTYPE(protosv) == SVt_PVCV)
proto = CvPROTO(protosv), proto_len = CvPROTOLEN(protosv);
else proto = SvPV(protosv, proto_len);
o3 = aop;
if (proto >= proto_end)
- return too_many_arguments(entersubop, gv_ename(namegv));
+ return too_many_arguments_sv(entersubop, gv_ename(namegv), 0);
switch (*proto) {
case ';':
continue;
case '_':
/* _ must be at the end */
- if (proto[1] && proto[1] != ';')
+ if (proto[1] && !strchr(";@%", proto[1]))
goto oops;
case '$':
proto++;
proto++;
arg++;
if (o3->op_type != OP_REFGEN && o3->op_type != OP_UNDEF)
- bad_type(arg,
+ bad_type_sv(arg,
arg == 1 ? "block or sub {}" : "sub {}",
- gv_ename(namegv), o3);
+ gv_ename(namegv), 0, o3);
break;
case '*':
/* '*' allows any scalar type, including bareword */
OP_READ, /* not entersub */
OP_LVALUE_NO_CROAK
)) goto wrapref;
- bad_type(arg, Perl_form(aTHX_ "one of %.*s",
+ bad_type_sv(arg, Perl_form(aTHX_ "one of %.*s",
(int)(end - p), p),
- gv_ename(namegv), o3);
+ gv_ename(namegv), 0, o3);
} else
goto oops;
break;
if (o3->op_type == OP_RV2GV)
goto wrapref;
if (!contextclass)
- bad_type(arg, "symbol", gv_ename(namegv), o3);
+ bad_type_sv(arg, "symbol", gv_ename(namegv), 0, o3);
break;
case '&':
if (o3->op_type == OP_ENTERSUB)
goto wrapref;
if (!contextclass)
- bad_type(arg, "subroutine entry", gv_ename(namegv),
+ bad_type_sv(arg, "subroutine entry", gv_ename(namegv), 0,
o3);
break;
case '$':
OP_READ, /* not entersub */
OP_LVALUE_NO_CROAK
)) goto wrapref;
- bad_type(arg, "scalar", gv_ename(namegv), o3);
+ bad_type_sv(arg, "scalar", gv_ename(namegv), 0, o3);
}
break;
case '@':
o3->op_type == OP_PADAV)
goto wrapref;
if (!contextclass)
- bad_type(arg, "array", gv_ename(namegv), o3);
+ bad_type_sv(arg, "array", gv_ename(namegv), 0, o3);
break;
case '%':
if (o3->op_type == OP_RV2HV ||
o3->op_type == OP_PADHV)
goto wrapref;
if (!contextclass)
- bad_type(arg, "hash", gv_ename(namegv), o3);
+ bad_type_sv(arg, "hash", gv_ename(namegv), 0, o3);
break;
wrapref:
{
}
if (!optional && proto_end > proto &&
(*proto != '@' && *proto != '%' && *proto != ';' && *proto != '_'))
- return too_few_arguments(entersubop, gv_ename(namegv));
+ return too_few_arguments_sv(entersubop, gv_ename(namegv), 0);
return entersubop;
}
for (cvop = aop; cvop->op_sibling; cvop = cvop->op_sibling) ;
if (PL_madskills) while (aop != cvop && aop->op_type == OP_STUB) {
aop = aop->op_sibling;
- continue;
}
if (aop != cvop)
- (void)too_many_arguments(entersubop, GvNAME(namegv));
+ (void)too_many_arguments_pv(entersubop, GvNAME(namegv), 0);
op_free(entersubop);
switch(GvNAME(namegv)[2]) {
#ifdef PERL_MAD
if (!PL_madskills || seenarg)
#endif
- (void)too_many_arguments(aop, GvNAME(namegv));
+ (void)too_many_arguments_pv(aop, GvNAME(namegv), 0);
op_free(aop);
}
- return newOP(opnum,0);
+ return opnum == OP_RUNCV
+ ? newPVOP(OP_RUNCV,0,NULL)
+ : newOP(opnum,0);
default:
return convert(opnum,0,aop);
}
SvREFCNT_inc_simple_void_NN(ckobj);
callmg->mg_flags |= MGf_REFCOUNTED;
}
+ callmg->mg_flags |= MGf_COPY;
}
}
}
OP *
+Perl_ck_tell(pTHX_ OP *o)
+{
+ PERL_ARGS_ASSERT_CK_TELL;
+ o = ck_fun(o);
+ if (o->op_flags & OPf_KIDS) {
+ OP *kid = cLISTOPo->op_first;
+ if (kid->op_type == OP_NULL && kid->op_sibling) kid = kid->op_sibling;
+ if (kid->op_type == OP_RV2GV) kid->op_private |= OPpALLOW_FAKE;
+ }
+ return o;
+}
+
+OP *
Perl_ck_each(pTHX_ OP *o)
{
dVAR;
case OP_PADHV:
case OP_PADAV:
name = varname(
- NULL, hash ? '%' : '@', kid->op_targ, NULL, 0, 1
+ (GV *)PL_compcv, hash ? '%' : '@', kid->op_targ,
+ NULL, 0, 1
);
break;
case OP_RV2HV:
return;
assert(cUNOPx(modop)->op_first->op_type == OP_PUSHMARK);
- oright = cUNOPx(modop)->op_first->op_sibling;
+ if (!(oright = cUNOPx(modop)->op_first->op_sibling)) return;
if (modop->op_flags & OPf_STACKED) {
/* skip sort subroutine/block */
firstcop->cop_line = secondcop->cop_line;
#ifdef USE_ITHREADS
firstcop->cop_stashpv = secondcop->cop_stashpv;
+ firstcop->cop_stashlen = secondcop->cop_stashlen;
firstcop->cop_file = secondcop->cop_file;
#else
firstcop->cop_stash = secondcop->cop_stash;
}
break;
+ case OP_RUNCV:
+ if (!(o->op_private & OPpOFFBYONE) && !CvCLONE(PL_compcv)) {
+ SV *sv;
+ if (CvUNIQUE(PL_compcv)) sv = &PL_sv_undef;
+ else {
+ sv = newRV((SV *)PL_compcv);
+ sv_rvweaken(sv);
+ SvREADONLY_on(sv);
+ }
+ o->op_type = OP_CONST;
+ o->op_ppaddr = PL_ppaddr[OP_CONST];
+ o->op_flags |= OPf_SPECIAL;
+ cSVOPo->op_sv = sv;
+ }
+ break;
+
+ case OP_SASSIGN:
+ if (OP_GIMME(o,0) == G_VOID) {
+ OP *right = cBINOP->op_first;
+ if (right) {
+ OP *left = right->op_sibling;
+ if (left->op_type == OP_SUBSTR
+ && (left->op_private & 7) < 4) {
+ op_null(o);
+ cBINOP->op_first = left;
+ right->op_sibling =
+ cBINOPx(left)->op_first->op_sibling;
+ cBINOPx(left)->op_first->op_sibling = right;
+ left->op_private |= OPpSUBSTR_REPL_FIRST;
+ left->op_flags =
+ (o->op_flags & ~OPf_WANT) | OPf_WANT_VOID;
+ }
+ }
+ }
+ break;
+
case OP_CUSTOM: {
Perl_cpeep_t cpeep =
XopENTRY(Perl_custom_op_xop(aTHX_ o), xop_peep);
This function assigns the prototype of the named core function to C<sv>, or
to a new mortal SV if C<sv> is NULL. It returns the modified C<sv>, or
NULL if the core function has no prototype. C<code> is a code as returned
-by C<keyword()>. It must be negative and unequal to -KEY_CORE.
+by C<keyword()>. It must not be equal to 0 or -KEY_CORE.
=cut
*/
PERL_ARGS_ASSERT_CORE_PROTOTYPE;
- assert (code < 0 && code != -KEY_CORE);
+ assert (code && code != -KEY_CORE);
if (!sv) sv = sv_newmortal();
#define retsetpvs(x,y) sv_setpvs(sv, x); if(opnum) *opnum=(y); return sv
- switch (-code) {
+ switch (code < 0 ? -code : code) {
case KEY_and : case KEY_chop: case KEY_chomp:
- case KEY_cmp : case KEY_exec: case KEY_eq :
- case KEY_ge : case KEY_gt : case KEY_le :
- case KEY_lt : case KEY_ne : case KEY_or :
- case KEY_select: case KEY_system: case KEY_x : case KEY_xor:
+ case KEY_cmp : case KEY_defined: case KEY_delete: case KEY_exec :
+ case KEY_exists: case KEY_eq : case KEY_ge : case KEY_goto :
+ case KEY_grep : case KEY_gt : case KEY_last : case KEY_le :
+ case KEY_lt : case KEY_map : case KEY_ne : case KEY_next :
+ case KEY_or : case KEY_print : case KEY_printf: case KEY_qr :
+ case KEY_redo : case KEY_require: case KEY_return: case KEY_say :
+ case KEY_select: case KEY_sort : case KEY_split : case KEY_system:
+ case KEY_x : case KEY_xor :
if (!opnum) return NULL; nullret = TRUE; goto findopnum;
+ case KEY_glob: retsetpvs("_;", OP_GLOB);
case KEY_keys: retsetpvs("+", OP_KEYS);
case KEY_values: retsetpvs("+", OP_VALUES);
case KEY_each: retsetpvs("+", OP_EACH);
case KEY_unshift: retsetpvs("+@", OP_UNSHIFT);
case KEY_pop: retsetpvs(";+", OP_POP);
case KEY_shift: retsetpvs(";+", OP_SHIFT);
+ case KEY_pos: retsetpvs(";\\[$*]", OP_POS);
case KEY_splice:
retsetpvs("+;$$@", OP_SPLICE);
case KEY___FILE__: case KEY___LINE__: case KEY___PACKAGE__:
}
i++;
}
- assert(0); return NULL; /* Should not happen... */
+ return NULL;
found:
defgv = PL_opargs[i] & OA_DEFGV;
oa = PL_opargs[i] >> OASHIFT;
str[n++] = '$';
str[n++] = '@';
str[n++] = '%';
- if (i == OP_LOCK) str[n++] = '&';
+ if (i == OP_LOCK || i == OP_UNDEF) str[n++] = '&';
str[n++] = '*';
str[n++] = ']';
}
onearg:
if (is_handle_constructor(o, 1))
argop->op_private |= OPpCOREARGS_DEREF1;
+ if (scalar_mod_type(NULL, opnum))
+ argop->op_private |= OPpCOREARGS_SCALARMOD;
}
return o;
default:
- o = convert(opnum,0,argop);
+ o = convert(opnum,OPf_SPECIAL*(opnum == OP_GLOB),argop);
if (is_handle_constructor(o, 2))
argop->op_private |= OPpCOREARGS_DEREF2;
- if (scalar_mod_type(NULL, opnum))
- argop->op_private |= OPpCOREARGS_SCALARMOD;
if (opnum == OP_SUBSTR) {
o->op_private |= OPpMAYBE_LVSUB;
return o;
name);
}
+/*
+=head1 Hook manipulation
+
+These functions provide convenient and thread-safe means of manipulating
+hook variables.
+
+=cut
+*/
+
+/*
+=for apidoc Am|void|wrap_op_checker|Optype opcode|Perl_check_t new_checker|Perl_check_t *old_checker_p
+
+Puts a C function into the chain of check functions for a specified op
+type. This is the preferred way to manipulate the L</PL_check> array.
+I<opcode> specifies which type of op is to be affected. I<new_checker>
+is a pointer to the C function that is to be added to that opcode's
+check chain, and I<old_checker_p> points to the storage location where a
+pointer to the next function in the chain will be stored. The value of
+I<new_pointer> is written into the L</PL_check> array, while the value
+previously stored there is written to I<*old_checker_p>.
+
+L</PL_check> is global to an entire process, and a module wishing to
+hook op checking may find itself invoked more than once per process,
+typically in different threads. To handle that situation, this function
+is idempotent. The location I<*old_checker_p> must initially (once
+per process) contain a null pointer. A C variable of static duration
+(declared at file scope, typically also marked C<static> to give
+it internal linkage) will be implicitly initialised appropriately,
+if it does not have an explicit initialiser. This function will only
+actually modify the check chain if it finds I<*old_checker_p> to be null.
+This function is also thread safe on the small scale. It uses appropriate
+locking to avoid race conditions in accessing L</PL_check>.
+
+When this function is called, the function referenced by I<new_checker>
+must be ready to be called, except for I<*old_checker_p> being unfilled.
+In a threading situation, I<new_checker> may be called immediately,
+even before this function has returned. I<*old_checker_p> will always
+be appropriately set before I<new_checker> is called. If I<new_checker>
+decides not to do anything special with an op that it is given (which
+is the usual case for most uses of op check hooking), it must chain the
+check function referenced by I<*old_checker_p>.
+
+If you want to influence compilation of calls to a specific subroutine,
+then use L</cv_set_call_checker> rather than hooking checking of all
+C<entersub> ops.
+
+=cut
+*/
+
+void
+Perl_wrap_op_checker(pTHX_ Optype opcode,
+ Perl_check_t new_checker, Perl_check_t *old_checker_p)
+{
+ dVAR;
+
+ PERL_ARGS_ASSERT_WRAP_OP_CHECKER;
+ if (*old_checker_p) return;
+ OP_CHECK_MUTEX_LOCK;
+ if (!*old_checker_p) {
+ *old_checker_p = PL_check[opcode];
+ PL_check[opcode] = new_checker;
+ }
+ OP_CHECK_MUTEX_UNLOCK;
+}
+
#include "XSUB.h"
/* Efficient sub that returns a constant scalar value. */
https://perl5.git.perl.org / perl5.git / blobdiff