PERL_ARGS_ASSERT_SAVE_MAGIC;
+ /* guard against sv having being freed midway by holding a private
+ reference. */
+ SvREFCNT_inc_simple_void_NN(sv);
+
assert(SvMAGICAL(sv));
/* Turning READONLY off for a copy-on-write scalar (including shared
hash keys) is a bad idea. */
case PERL_MAGIC_rhash:
case PERL_MAGIC_symtab:
case PERL_MAGIC_tied: /* treat as value, so 'local @tied' isn't tied */
+ case PERL_MAGIC_checkcall:
return 0;
default:
return 1;
{
dVAR;
const I32 mgs_ix = SSNEW(sizeof(MGS));
- const bool was_temp = cBOOL(SvTEMP(sv));
bool have_new = 0;
MAGIC *newmg, *head, *cur, *mg;
- /* guard against sv having being freed midway by holding a private
- reference. */
PERL_ARGS_ASSERT_MG_GET;
- /* sv_2mortal has this side effect of turning on the TEMP flag, which can
- cause the SV's buffer to get stolen (and maybe other stuff).
- So restore it.
- */
- sv_2mortal(SvREFCNT_inc_simple_NN(sv));
- if (!was_temp) {
- SvTEMP_off(sv);
- }
-
save_magic(mgs_ix, sv);
/* We must call svt_get(sv, mg) for each valid entry in the linked
MAGIC * const nextmg = mg->mg_moremagic; /* it may delete itself */
if (!(mg->mg_flags & MGf_GSKIP) && vtbl && vtbl->svt_get) {
- CALL_FPTR(vtbl->svt_get)(aTHX_ sv, mg);
+ vtbl->svt_get(aTHX_ sv, mg);
/* guard against magic having been deleted - eg FETCH calling
* untie */
}
restore_magic(INT2PTR(void *, (IV)mgs_ix));
-
- if (SvREFCNT(sv) == 1) {
- /* We hold the last reference to this SV, which implies that the
- SV was deleted as a side effect of the routines we called. */
- SvOK_off(sv);
- }
return 0;
}
if (PL_localizing == 2 && !S_is_container_magic(mg))
continue;
if (vtbl && vtbl->svt_set)
- CALL_FPTR(vtbl->svt_set)(aTHX_ sv, mg);
+ vtbl->svt_set(aTHX_ sv, mg);
}
restore_magic(INT2PTR(void*, (IV)mgs_ix));
const I32 mgs_ix = SSNEW(sizeof(MGS));
save_magic(mgs_ix, sv);
/* omit MGf_GSKIP -- not changed here */
- len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
+ len = vtbl->svt_len(aTHX_ sv, mg);
restore_magic(INT2PTR(void*, (IV)mgs_ix));
return len;
}
I32 len;
save_magic(mgs_ix, sv);
/* omit MGf_GSKIP -- not changed here */
- len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
+ len = vtbl->svt_len(aTHX_ sv, mg);
restore_magic(INT2PTR(void*, (IV)mgs_ix));
return len;
}
nextmg = mg->mg_moremagic; /* it may delete itself */
if (vtbl && vtbl->svt_clear)
- CALL_FPTR(vtbl->svt_clear)(aTHX_ sv, mg);
+ vtbl->svt_clear(aTHX_ sv, mg);
}
restore_magic(INT2PTR(void*, (IV)mgs_ix));
return 0;
}
+MAGIC*
+S_mg_findext_flags(pTHX_ const SV *sv, int type, const MGVTBL *vtbl, U32 flags)
+{
+ PERL_UNUSED_CONTEXT;
+
+ assert(flags <= 1);
+
+ if (sv) {
+ MAGIC *mg;
+
+ for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
+ if (mg->mg_type == type && (!flags || mg->mg_virtual == vtbl)) {
+ return mg;
+ }
+ }
+ }
+
+ return NULL;
+}
+
/*
=for apidoc mg_find
MAGIC*
Perl_mg_find(pTHX_ const SV *sv, int type)
{
- PERL_UNUSED_CONTEXT;
- if (sv) {
- MAGIC *mg;
- for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
- if (mg->mg_type == type)
- return mg;
- }
- }
- return NULL;
+ return S_mg_findext_flags(aTHX_ sv, type, NULL, 0);
+}
+
+/*
+=for apidoc mg_findext
+
+Finds the magic pointer of C<type> with the given C<vtbl> for the C<SV>. See
+C<sv_magicext>.
+
+=cut
+*/
+
+MAGIC*
+Perl_mg_findext(pTHX_ const SV *sv, int type, const MGVTBL *vtbl)
+{
+ return S_mg_findext_flags(aTHX_ sv, type, vtbl, 1);
}
/*
for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
const MGVTBL* const vtbl = mg->mg_virtual;
if ((mg->mg_flags & MGf_COPY) && vtbl->svt_copy){
- count += CALL_FPTR(vtbl->svt_copy)(aTHX_ sv, mg, nsv, key, klen);
+ count += vtbl->svt_copy(aTHX_ sv, mg, nsv, key, klen);
}
else {
const char type = mg->mg_type;
continue;
if ((mg->mg_flags & MGf_LOCAL) && vtbl->svt_local)
- (void)CALL_FPTR(vtbl->svt_local)(aTHX_ nsv, mg);
+ (void)vtbl->svt_local(aTHX_ nsv, mg);
else
sv_magicext(nsv, mg->mg_obj, mg->mg_type, vtbl,
mg->mg_ptr, mg->mg_len);
}
}
+#define mg_free_struct(sv, mg) S_mg_free_struct(aTHX_ sv, mg)
+static void
+S_mg_free_struct(pTHX_ SV *sv, MAGIC *mg)
+{
+ const MGVTBL* const vtbl = mg->mg_virtual;
+ if (vtbl && vtbl->svt_free)
+ vtbl->svt_free(aTHX_ sv, mg);
+ if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
+ if (mg->mg_len > 0 || mg->mg_type == PERL_MAGIC_utf8)
+ Safefree(mg->mg_ptr);
+ else if (mg->mg_len == HEf_SVKEY)
+ SvREFCNT_dec(MUTABLE_SV(mg->mg_ptr));
+ }
+ if (mg->mg_flags & MGf_REFCOUNTED)
+ SvREFCNT_dec(mg->mg_obj);
+ Safefree(mg);
+}
+
/*
=for apidoc mg_free
PERL_ARGS_ASSERT_MG_FREE;
for (mg = SvMAGIC(sv); mg; mg = moremagic) {
- const MGVTBL* const vtbl = mg->mg_virtual;
moremagic = mg->mg_moremagic;
- if (vtbl && vtbl->svt_free)
- CALL_FPTR(vtbl->svt_free)(aTHX_ sv, mg);
- if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
- if (mg->mg_len > 0 || mg->mg_type == PERL_MAGIC_utf8)
- Safefree(mg->mg_ptr);
- else if (mg->mg_len == HEf_SVKEY)
- SvREFCNT_dec(MUTABLE_SV(mg->mg_ptr));
- }
- if (mg->mg_flags & MGf_REFCOUNTED)
- SvREFCNT_dec(mg->mg_obj);
- Safefree(mg);
+ mg_free_struct(sv, mg);
SvMAGIC_set(sv, moremagic);
}
SvMAGIC_set(sv, NULL);
return 0;
}
+/*
+=for apidoc Am|void|mg_free_type|SV *sv|int how
+
+Remove any magic of type I<how> from the SV I<sv>. See L</sv_magic>.
+
+=cut
+*/
+
+void
+Perl_mg_free_type(pTHX_ SV *sv, int how)
+{
+ MAGIC *mg, *prevmg, *moremg;
+ PERL_ARGS_ASSERT_MG_FREE_TYPE;
+ for (prevmg = NULL, mg = SvMAGIC(sv); mg; prevmg = mg, mg = moremg) {
+ MAGIC *newhead;
+ moremg = mg->mg_moremagic;
+ if (mg->mg_type == how) {
+ /* temporarily move to the head of the magic chain, in case
+ custom free code relies on this historical aspect of mg_free */
+ if (prevmg) {
+ prevmg->mg_moremagic = moremg;
+ mg->mg_moremagic = SvMAGIC(sv);
+ SvMAGIC_set(sv, mg);
+ }
+ newhead = mg->mg_moremagic;
+ mg_free_struct(sv, mg);
+ SvMAGIC_set(sv, newhead);
+ mg = prevmg;
+ }
+ }
+ mg_magical(sv);
+}
+
#include <signal.h>
U32
sv_setpvs(sv, "");
SvUTF8_off(sv);
if ((CopHINTS_get(c) & HINT_LEXICAL_IO_IN)) {
- SV *const value = Perl_refcounted_he_fetch(aTHX_
- c->cop_hints_hash,
- 0, "open<", 5, 0, 0);
+ SV *const value = cop_hints_fetch_pvs(c, "open<", 0);
assert(value);
sv_catsv(sv, value);
}
sv_catpvs(sv, "\0");
if ((CopHINTS_get(c) & HINT_LEXICAL_IO_OUT)) {
- SV *const value = Perl_refcounted_he_fetch(aTHX_
- c->cop_hints_hash,
- 0, "open>", 5, 0, 0);
+ SV *const value = cop_hints_fetch_pvs(c, "open>", 0);
assert(value);
sv_catsv(sv, value);
}
switch (*mg->mg_ptr) {
case '\001': /* ^A */
sv_setsv(sv, PL_bodytarget);
+ if (SvTAINTED(PL_bodytarget))
+ SvTAINTED_on(sv);
break;
case '\003': /* ^C, ^CHILD_ERROR_NATIVE */
if (nextchar == '\0') {
case '\006': /* ^F */
sv_setiv(sv, (IV)PL_maxsysfd);
break;
+ case '\007': /* ^GLOBAL_PHASE */
+ if (strEQ(remaining, "LOBAL_PHASE")) {
+ sv_setpvn(sv, PL_phase_names[PL_phase],
+ strlen(PL_phase_names[PL_phase]));
+ }
+ break;
case '\010': /* ^H */
sv_setiv(sv, (IV)PL_hints);
break;
Perl_emulate_cop_io(aTHX_ &PL_compiling, sv);
}
break;
- case '\020':
+ case '\020':
if (nextchar == '\0') { /* ^P */
sv_setiv(sv, (IV)PL_perldb);
} else if (strEQ(remaining, "REMATCH")) { /* $^PREMATCH */
#ifdef VMS
if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
char pathbuf[256], eltbuf[256], *cp, *elt;
- Stat_t sbuf;
int i = 0, j = 0;
my_strlcpy(eltbuf, s, sizeof(eltbuf));
}
#endif
+#if defined HAS_SIGPROCMASK
+static void
+unblock_sigmask(pTHX_ void* newset)
+{
+ sigprocmask(SIG_UNBLOCK, (sigset_t*)newset, NULL);
+}
+#endif
+
void
Perl_despatch_signals(pTHX)
{
for (sig = 1; sig < SIG_SIZE; sig++) {
if (PL_psig_pend[sig]) {
dSAVE_ERRNO;
- PERL_BLOCKSIG_ADD(set, sig);
+#ifdef HAS_SIGPROCMASK
+ /* From sigaction(2) (FreeBSD man page):
+ * | Signal routines normally execute with the signal that
+ * | caused their invocation blocked, but other signals may
+ * | yet occur.
+ * Emulation of this behavior (from within Perl) is enabled
+ * using sigprocmask
+ */
+ int was_blocked;
+ sigset_t newset, oldset;
+
+ sigemptyset(&newset);
+ sigaddset(&newset, sig);
+ sigprocmask(SIG_BLOCK, &newset, &oldset);
+ was_blocked = sigismember(&oldset, sig);
+ if (!was_blocked) {
+ SV* save_sv = newSVpvn((char *)(&newset), sizeof(sigset_t));
+ ENTER;
+ SAVEFREESV(save_sv);
+ SAVEDESTRUCTOR_X(unblock_sigmask, SvPV_nolen(save_sv));
+ }
+#endif
PL_psig_pend[sig] = 0;
- PERL_BLOCKSIG_BLOCK(set);
#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
(*PL_sighandlerp)(sig, NULL, NULL);
#else
(*PL_sighandlerp)(sig);
#endif
- PERL_BLOCKSIG_UNBLOCK(set);
+#ifdef HAS_SIGPROCMASK
+ if (!was_blocked)
+ LEAVE;
+#endif
RESTORE_ERRNO;
}
}
PERL_ARGS_ASSERT_MAGIC_CLEARISA;
/* Bail out if destruction is going on */
- if(PL_dirty) return 0;
+ if(PL_phase == PERL_PHASE_DESTRUCT) return 0;
if (sv)
av_clear(MUTABLE_AV(sv));
- /* XXX Once it's possible, we need to
- detect that our @ISA is aliased in
- other stashes, and act on the stashes
- of all of the aliases */
+ if (SvTYPE(mg->mg_obj) != SVt_PVGV && SvSMAGICAL(mg->mg_obj))
+ /* This occurs with setisa_elem magic, which calls this
+ same function. */
+ mg = mg_find(mg->mg_obj, PERL_MAGIC_isa);
+
+ if (SvTYPE(mg->mg_obj) == SVt_PVAV) { /* multiple stashes */
+ SV **svp = AvARRAY((AV *)mg->mg_obj);
+ I32 items = AvFILLp((AV *)mg->mg_obj) + 1;
+ while (items--) {
+ stash = GvSTASH((GV *)*svp++);
+ if (stash && HvENAME(stash)) mro_isa_changed_in(stash);
+ }
+
+ return 0;
+ }
- /* The first case occurs via setisa,
- the second via setisa_elem, which
- calls this same magic */
stash = GvSTASH(
- SvTYPE(mg->mg_obj) == SVt_PVGV
- ? (const GV *)mg->mg_obj
- : (const GV *)mg_find(mg->mg_obj, PERL_MAGIC_isa)->mg_obj
+ (const GV *)mg->mg_obj
);
- if (stash)
+ /* The stash may have been detached from the symbol table, so check its
+ name before doing anything. */
+ if (stash && HvENAME_get(stash))
mro_isa_changed_in(stash);
return 0;
Invoke a magic method (like FETCH).
-* sv and mg are the tied thinggy and the tie magic;
+* sv and mg are the tied thingy and the tie magic;
* meth is the name of the method to call;
* argc is the number of args (in addition to $self) to pass to the method;
the args themselves are any values following the argc argument.
PERL_ARGS_ASSERT_MAGIC_METHCALL;
ENTER;
+
+ if (flags & G_WRITING_TO_STDERR) {
+ SAVETMPS;
+
+ save_re_context();
+ SAVESPTR(PL_stderrgv);
+ PL_stderrgv = NULL;
+ }
+
PUSHSTACKi(PERLSI_MAGIC);
PUSHMARK(SP);
ret = *PL_stack_sp--;
}
POPSTACK;
+ if (flags & G_WRITING_TO_STDERR)
+ FREETMPS;
LEAVE;
return ret;
}
const char * const remaining = mg->mg_ptr + 1;
I32 i;
STRLEN len;
+ MAGIC *tmg;
PERL_ARGS_ASSERT_MAGIC_SET;
setparen:
if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
CALLREG_NUMBUF_STORE((REGEXP * const)rx,paren,sv);
- break;
} else {
/* Croak with a READONLY error when a numbered match var is
* set without a previous pattern match. Unless it's C<local $1>
Perl_croak_no_modify(aTHX);
}
}
+ break;
case '\001': /* ^A */
sv_setsv(PL_bodytarget, sv);
+ /* mg_set() has temporarily made sv non-magical */
+ if (PL_tainting) {
+ if ((tmg = mg_find(sv,PERL_MAGIC_taint)) && tmg->mg_len & 1)
+ SvTAINTED_on(PL_bodytarget);
+ else
+ SvTAINTED_off(PL_bodytarget);
+ }
break;
case '\003': /* ^C */
PL_minus_c = cBOOL(SvIV(sv));
} else if (strEQ(remaining, "OSTMATCH")) { /* $^POSTMATCH */
goto do_postmatch;
}
+ break;
case '\024': /* ^T */
#ifdef BIG_TIME
PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
Signal_t
#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
-Perl_sighandler(int sig, siginfo_t *sip, void *uap PERL_UNUSED_DECL)
+Perl_sighandler(int sig, siginfo_t *sip, void *uap)
#else
Perl_sighandler(int sig)
#endif
OP *myop = PL_op;
U32 flags = 0;
XPV * const tXpv = PL_Xpv;
+ I32 old_ss_ix = PL_savestack_ix;
- if (PL_savestack_ix + 15 <= PL_savestack_max)
- flags |= 1;
- if (PL_markstack_ptr < PL_markstack_max - 2)
- flags |= 4;
- if (PL_scopestack_ix < PL_scopestack_max - 3)
- flags |= 16;
if (!PL_psig_ptr[sig]) {
PerlIO_printf(Perl_error_log, "Signal SIG%s received, but no signal handler set.\n",
/* Max number of items pushed there is 3*n or 4. We cannot fix
infinity, so we fix 4 (in fact 5): */
- if (flags & 1) {
+ if (PL_savestack_ix + 15 <= PL_savestack_max) {
+ flags |= 1;
PL_savestack_ix += 5; /* Protect save in progress. */
- SAVEDESTRUCTOR_X(S_unwind_handler_stack, (void*)&flags);
+ SAVEDESTRUCTOR_X(S_unwind_handler_stack, NULL);
}
- if (flags & 4)
- PL_markstack_ptr++; /* Protect mark. */
- if (flags & 16)
- PL_scopestack_ix += 1;
/* sv_2cv is too complicated, try a simpler variant first: */
if (!SvROK(PL_psig_ptr[sig]) || !(cv = MUTABLE_CV(SvRV(PL_psig_ptr[sig])))
|| SvTYPE(cv) != SVt_PVCV) {
goto cleanup;
}
- if(PL_psig_name[sig]) {
- sv = SvREFCNT_inc_NN(PL_psig_name[sig]);
- flags |= 64;
-#if !defined(PERL_IMPLICIT_CONTEXT)
- PL_sig_sv = sv;
-#endif
- } else {
- sv = sv_newmortal();
- sv_setpv(sv,PL_sig_name[sig]);
- }
+ sv = PL_psig_name[sig]
+ ? SvREFCNT_inc_NN(PL_psig_name[sig])
+ : newSVpv(PL_sig_name[sig],0);
+ flags |= 8;
+ SAVEFREESV(sv);
+
+ /* make sure our assumption about the size of the SAVEs are correct:
+ * 3 for SAVEDESTRUCTOR_X, 2 for SAVEFREESV */
+ assert(old_ss_ix + 2 + ((flags & 1) ? 3+5 : 0) == PL_savestack_ix);
PUSHSTACKi(PERLSI_SIGNAL);
PUSHMARK(SP);
POPSTACK;
if (SvTRUE(ERRSV)) {
#ifndef PERL_MICRO
-#ifdef HAS_SIGPROCMASK
/* Handler "died", for example to get out of a restart-able read().
* Before we re-do that on its behalf re-enable the signal which was
* blocked by the system when we entered.
*/
- sigset_t set;
- sigemptyset(&set);
- sigaddset(&set,sig);
- sigprocmask(SIG_UNBLOCK, &set, NULL);
+#ifdef HAS_SIGPROCMASK
+#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
+ if (sip || uap)
+#endif
+ {
+ sigset_t set;
+ sigemptyset(&set);
+ sigaddset(&set,sig);
+ sigprocmask(SIG_UNBLOCK, &set, NULL);
+ }
#else
/* Not clear if this will work */
(void)rsignal(sig, SIG_IGN);
die_sv(ERRSV);
}
cleanup:
- if (flags & 1)
- PL_savestack_ix -= 8; /* Unprotect save in progress. */
- if (flags & 4)
- PL_markstack_ptr--;
- if (flags & 16)
- PL_scopestack_ix -= 1;
- if (flags & 64)
+ /* pop any of SAVEFREESV, SAVEDESTRUCTOR_X and "save in progress" */
+ PL_savestack_ix = old_ss_ix;
+ if (flags & 8)
SvREFCNT_dec(sv);
PL_op = myop; /* Apparently not needed... */
assert((popval & SAVE_MASK) == SAVEt_ALLOC);
PL_savestack_ix -= popval >> SAVE_TIGHT_SHIFT;
}
-
+ if (SvREFCNT(sv) == 1) {
+ /* We hold the last reference to this SV, which implies that the
+ SV was deleted as a side effect of the routines we called.
+ So artificially keep it alive a bit longer.
+ We avoid turning on the TEMP flag, which can cause the SV's
+ buffer to get stolen (and maybe other stuff). */
+ int was_temp = SvTEMP(sv);
+ sv_2mortal(sv);
+ if (!was_temp) {
+ SvTEMP_off(sv);
+ }
+ SvOK_off(sv);
+ }
+ else
+ SvREFCNT_dec(sv); /* undo the inc in S_save_magic() */
}
+/* clean up the mess created by Perl_sighandler().
+ * Note that this is only called during an exit in a signal handler;
+ * a die is trapped by the call_sv() and the SAVEDESTRUCTOR_X manually
+ * skipped over. */
+
static void
S_unwind_handler_stack(pTHX_ const void *p)
{
dVAR;
- const U32 flags = *(const U32*)p;
+ PERL_UNUSED_ARG(p);
- PERL_ARGS_ASSERT_UNWIND_HANDLER_STACK;
-
- if (flags & 1)
- PL_savestack_ix -= 5; /* Unprotect save in progress. */
-#if !defined(PERL_IMPLICIT_CONTEXT)
- if (flags & 64)
- SvREFCNT_dec(PL_sig_sv);
-#endif
+ PL_savestack_ix -= 5; /* Unprotect save in progress. */
}
/*
Doing this here saves a lot of doing it manually in perl code (and
forgetting to do it, and consequent subtle errors. */
PL_hints |= HINT_LOCALIZE_HH;
- PL_compiling.cop_hints_hash
- = Perl_refcounted_he_new(aTHX_ PL_compiling.cop_hints_hash, key, sv);
+ CopHINTHASH_set(&PL_compiling,
+ cophh_store_sv(CopHINTHASH_get(&PL_compiling), key, 0, sv, 0));
return 0;
}
PERL_UNUSED_ARG(sv);
PL_hints |= HINT_LOCALIZE_HH;
- PL_compiling.cop_hints_hash
- = Perl_refcounted_he_new(aTHX_ PL_compiling.cop_hints_hash,
- MUTABLE_SV(mg->mg_ptr), &PL_sv_placeholder);
+ CopHINTHASH_set(&PL_compiling,
+ cophh_delete_sv(CopHINTHASH_get(&PL_compiling),
+ MUTABLE_SV(mg->mg_ptr), 0, 0));
return 0;
}
PERL_ARGS_ASSERT_MAGIC_CLEARHINTS;
PERL_UNUSED_ARG(sv);
PERL_UNUSED_ARG(mg);
- if (PL_compiling.cop_hints_hash) {
- Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
- PL_compiling.cop_hints_hash = NULL;
- }
+ cophh_free(CopHINTHASH_get(&PL_compiling));
+ CopHINTHASH_set(&PL_compiling, cophh_new_empty());
return 0;
}
https://perl5.git.perl.org / perl5.git / blobdiff