/* mg.c
*
* Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- * 2000, 2001, 2002, 2003, by Larry Wall and others
+ * 2000, 2001, 2002, 2003, 2004, 2005 by Larry Wall and others
*
* You may distribute under the terms of either the GNU General Public
* License or the Artistic License, as specified in the README file.
/*
=head1 Magical Functions
+
+"Magic" is special data attached to SV structures in order to give them
+"magical" properties. When any Perl code tries to read from, or assign to,
+an SV marked as magical, it calls the 'get' or 'set' function associated
+with that SV's magic. A get is called prior to reading an SV, in order to
+give it a chance to update its internal value (get on $. writes the line
+number of the last read filehandle into to the SV's IV slot), while
+set is called after an SV has been written to, in order to allow it to make
+use of its changed value (set on $/ copies the SV's new value to the
+PL_rs global variable).
+
+Magic is implemented as a linked list of MAGIC structures attached to the
+SV. Each MAGIC struct holds the type of the magic, a pointer to an array
+of functions that implement the get(), set(), length() etc functions,
+plus space for some flags and pointers. For example, a tied variable has
+a MAGIC structure that contains a pointer to the object associated with the
+tie.
+
*/
#include "EXTERN.h"
Signal_t Perl_csighandler(int sig);
-/* if you only have signal() and it resets on each signal, FAKE_PERSISTENT_SIGNAL_HANDLERS fixes */
-#if !defined(HAS_SIGACTION) && defined(VMS)
-# define FAKE_PERSISTENT_SIGNAL_HANDLERS
-#endif
-/* if we're doing kill() with sys$sigprc on VMS, FAKE_DEFAULT_SIGNAL_HANDLERS */
-#if defined(KILL_BY_SIGPRC)
-# define FAKE_DEFAULT_SIGNAL_HANDLERS
-#endif
+static void restore_magic(pTHX_ const void *p);
+static void unwind_handler_stack(pTHX_ const void *p);
-static void restore_magic(pTHX_ void *p);
-static void unwind_handler_stack(pTHX_ void *p);
+#ifdef __Lynx__
+/* Missing protos on LynxOS */
+void setruid(uid_t id);
+void seteuid(uid_t id);
+void setrgid(uid_t id);
+void setegid(uid_t id);
+#endif
/*
* Use the "DESTRUCTOR" scope cleanup to reinstate magic.
void
Perl_mg_magical(pTHX_ SV *sv)
{
- MAGIC* mg;
+ const MAGIC* mg;
for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
- MGVTBL* vtbl = mg->mg_virtual;
+ const MGVTBL* const vtbl = mg->mg_virtual;
if (vtbl) {
if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP))
SvGMAGICAL_on(sv);
int
Perl_mg_get(pTHX_ SV *sv)
{
- int new = 0;
+ const I32 mgs_ix = SSNEW(sizeof(MGS));
+ const bool was_temp = (bool)SvTEMP(sv);
+ int have_new = 0;
MAGIC *newmg, *head, *cur, *mg;
- I32 mgs_ix = SSNEW(sizeof(MGS));
+ /* guard against sv having being freed midway by holding a private
+ reference. */
+
+ /* 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(sv));
+ if (!was_temp) {
+ SvTEMP_off(sv);
+ }
save_magic(mgs_ix, sv);
newmg = cur = head = mg = SvMAGIC(sv);
while (mg) {
- MGVTBL *vtbl = mg->mg_virtual;
+ const MGVTBL * const vtbl = mg->mg_virtual;
if (!(mg->mg_flags & MGf_GSKIP) && vtbl && vtbl->svt_get) {
CALL_FPTR(vtbl->svt_get)(aTHX_ sv, mg);
- /* guard against sv having been freed */
- if (SvTYPE(sv) == SVTYPEMASK) {
- Perl_croak(aTHX_ "Tied variable freed while still in use");
- }
+ /* guard against magic having been deleted - eg FETCH calling
+ * untie */
+ if (!SvMAGIC(sv))
+ break;
/* Don't restore the flags for this entry if it was deleted. */
if (mg->mg_flags & MGf_GSKIP)
mg = mg->mg_moremagic;
- if (new) {
+ if (have_new) {
/* Have we finished with the new entries we saw? Start again
where we left off (unless there are more new entries). */
if (mg == head) {
- new = 0;
+ have_new = 0;
mg = cur;
head = newmg;
}
}
/* Were any new entries added? */
- if (!new && (newmg = SvMAGIC(sv)) != head) {
- new = 1;
+ if (!have_new && (newmg = SvMAGIC(sv)) != head) {
+ have_new = 1;
cur = mg;
mg = newmg;
}
}
restore_magic(aTHX_ 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;
}
int
Perl_mg_set(pTHX_ SV *sv)
{
- I32 mgs_ix;
+ const I32 mgs_ix = SSNEW(sizeof(MGS));
MAGIC* mg;
MAGIC* nextmg;
- mgs_ix = SSNEW(sizeof(MGS));
save_magic(mgs_ix, sv);
for (mg = SvMAGIC(sv); mg; mg = nextmg) {
- MGVTBL* vtbl = mg->mg_virtual;
+ const MGVTBL* vtbl = mg->mg_virtual;
nextmg = mg->mg_moremagic; /* it may delete itself */
if (mg->mg_flags & MGf_GSKIP) {
mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */
STRLEN len;
for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
- MGVTBL* vtbl = mg->mg_virtual;
+ const MGVTBL * const vtbl = mg->mg_virtual;
if (vtbl && vtbl->svt_len) {
- I32 mgs_ix;
-
- mgs_ix = SSNEW(sizeof(MGS));
+ 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);
}
}
- if (DO_UTF8(sv))
- {
+ if (DO_UTF8(sv)) {
U8 *s = (U8*)SvPV(sv, len);
len = Perl_utf8_length(aTHX_ s, s + len);
}
Perl_mg_size(pTHX_ SV *sv)
{
MAGIC* mg;
- I32 len;
for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
- MGVTBL* vtbl = mg->mg_virtual;
+ const MGVTBL* const vtbl = mg->mg_virtual;
if (vtbl && vtbl->svt_len) {
- I32 mgs_ix;
-
- mgs_ix = SSNEW(sizeof(MGS));
+ const I32 mgs_ix = SSNEW(sizeof(MGS));
+ I32 len;
save_magic(mgs_ix, sv);
/* omit MGf_GSKIP -- not changed here */
len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
switch(SvTYPE(sv)) {
case SVt_PVAV:
- len = AvFILLp((AV *) sv); /* Fallback to non-tied array */
- return len;
+ return AvFILLp((AV *) sv); /* Fallback to non-tied array */
case SVt_PVHV:
/* FIXME */
default:
int
Perl_mg_clear(pTHX_ SV *sv)
{
- I32 mgs_ix;
+ const I32 mgs_ix = SSNEW(sizeof(MGS));
MAGIC* mg;
- mgs_ix = SSNEW(sizeof(MGS));
save_magic(mgs_ix, sv);
for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
- MGVTBL* vtbl = mg->mg_virtual;
+ const MGVTBL* const vtbl = mg->mg_virtual;
/* omit GSKIP -- never set here */
if (vtbl && vtbl->svt_clear)
*/
MAGIC*
-Perl_mg_find(pTHX_ SV *sv, int type)
+Perl_mg_find(pTHX_ const SV *sv, int type)
{
- MAGIC* mg;
- if (!sv)
- return 0;
- for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
- if (mg->mg_type == type)
- return mg;
+ if (sv) {
+ MAGIC *mg;
+ for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
+ if (mg->mg_type == type)
+ return mg;
+ }
}
return 0;
}
int count = 0;
MAGIC* mg;
for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
- MGVTBL* vtbl = mg->mg_virtual;
+ 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);
}
MAGIC* mg;
MAGIC* moremagic;
for (mg = SvMAGIC(sv); mg; mg = moremagic) {
- MGVTBL* vtbl = mg->mg_virtual;
+ 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)
+ if (mg->mg_len > 0 || mg->mg_type == PERL_MAGIC_utf8)
Safefree(mg->mg_ptr);
else if (mg->mg_len == HEf_SVKEY)
SvREFCNT_dec((SV*)mg->mg_ptr);
SvREFCNT_dec(mg->mg_obj);
Safefree(mg);
}
- SvMAGIC(sv) = 0;
+ SvMAGIC_set(sv, NULL);
return 0;
}
-
-#if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
#include <signal.h>
-#endif
U32
Perl_magic_regdata_cnt(pTHX_ SV *sv, MAGIC *mg)
{
- register REGEXP *rx;
+ register const REGEXP *rx;
+ (void)sv;
if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
if (mg->mg_obj) /* @+ */
int
Perl_magic_regdatum_get(pTHX_ SV *sv, MAGIC *mg)
{
- register I32 paren;
- register I32 s;
- register I32 i;
register REGEXP *rx;
- I32 t;
if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
- paren = mg->mg_len;
+ register const I32 paren = mg->mg_len;
+ register I32 s;
+ register I32 t;
if (paren < 0)
return 0;
if (paren <= (I32)rx->nparens &&
(s = rx->startp[paren]) != -1 &&
(t = rx->endp[paren]) != -1)
{
+ register I32 i;
if (mg->mg_obj) /* @+ */
i = t;
else /* @- */
int
Perl_magic_regdatum_set(pTHX_ SV *sv, MAGIC *mg)
{
+ (void)sv; (void)mg;
Perl_croak(aTHX_ PL_no_modify);
/* NOT REACHED */
+#ifndef HASATTRIBUTE
+ /* No __attribute__, so the compiler doesn't know that croak never returns
+ */
return 0;
+#endif
}
U32
{
register I32 paren;
register I32 i;
- register REGEXP *rx;
+ register const REGEXP *rx;
I32 s1, t1;
switch (*mg->mg_ptr) {
}
else {
if (ckWARN(WARN_UNINITIALIZED))
- report_uninit();
+ report_uninit(sv);
}
}
else {
if (ckWARN(WARN_UNINITIALIZED))
- report_uninit();
+ report_uninit(sv);
}
return 0;
case '+':
int
Perl_magic_get(pTHX_ SV *sv, MAGIC *mg)
{
+ dVAR;
register I32 paren;
- register char *s;
+ register char *s = NULL;
register I32 i;
register REGEXP *rx;
case '\004': /* ^D */
sv_setiv(sv, (IV)(PL_debug & DEBUG_MASK));
-#if defined(YYDEBUG) && defined(DEBUGGING)
- PL_yydebug = DEBUG_p_TEST;
-#endif
break;
case '\005': /* ^E */
if (*(mg->mg_ptr+1) == '\0') {
SetLastError(dwErr);
}
#else
- sv_setnv(sv, (NV)errno);
- sv_setpv(sv, errno ? Strerror(errno) : "");
+ {
+ int saveerrno = errno;
+ sv_setnv(sv, (NV)errno);
+ sv_setpv(sv, errno ? Strerror(errno) : "");
+ errno = saveerrno;
+ }
#endif
#endif
#endif
sv_setsv(sv, &PL_sv_undef);
break;
case '\017': /* ^O & ^OPEN */
- if (*(mg->mg_ptr+1) == '\0')
+ if (*(mg->mg_ptr+1) == '\0') {
sv_setpv(sv, PL_osname);
+ SvTAINTED_off(sv);
+ }
else if (strEQ(mg->mg_ptr, "\017PEN")) {
if (!PL_compiling.cop_io)
sv_setsv(sv, &PL_sv_undef);
case '\023': /* ^S */
if (*(mg->mg_ptr+1) == '\0') {
if (PL_lex_state != LEX_NOTPARSING)
- (void)SvOK_off(sv);
+ SvOK_off(sv);
else if (PL_in_eval)
sv_setiv(sv, PL_in_eval & ~(EVAL_INREQUIRE));
else
? (PL_taint_warn || PL_unsafe ? -1 : 1)
: 0);
break;
- case '\025': /* $^UNICODE */
+ case '\025': /* $^UNICODE, $^UTF8LOCALE */
if (strEQ(mg->mg_ptr, "\025NICODE"))
sv_setuv(sv, (UV) PL_unicode);
+ else if (strEQ(mg->mg_ptr, "\025TF8LOCALE"))
+ sv_setuv(sv, (UV) PL_utf8locale);
break;
case '\027': /* ^W & $^WARNING_BITS */
if (*(mg->mg_ptr+1) == '\0')
MAGIC* mg = SvMAGIC(sv);
MAGIC* mgt;
PL_tainted = 1;
- SvMAGIC(sv) = mg->mg_moremagic;
+ SvMAGIC_set(sv, mg->mg_moremagic);
SvTAINT(sv);
if ((mgt = SvMAGIC(sv))) {
mg->mg_moremagic = mgt;
- SvMAGIC(sv) = mg;
+ SvMAGIC_set(sv, mg);
}
} else
SvTAINTED_off(sv);
}
break;
case '^':
- s = IoTOP_NAME(GvIOp(PL_defoutgv));
+ if (GvIOp(PL_defoutgv))
+ s = IoTOP_NAME(GvIOp(PL_defoutgv));
if (s)
sv_setpv(sv,s);
else {
}
break;
case '~':
- s = IoFMT_NAME(GvIOp(PL_defoutgv));
+ if (GvIOp(PL_defoutgv))
+ s = IoFMT_NAME(GvIOp(PL_defoutgv));
if (!s)
s = GvENAME(PL_defoutgv);
sv_setpv(sv,s);
break;
#ifndef lint
case '=':
- sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
+ if (GvIOp(PL_defoutgv))
+ sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
break;
case '-':
- sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
+ if (GvIOp(PL_defoutgv))
+ sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
break;
case '%':
- sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
+ if (GvIOp(PL_defoutgv))
+ sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
break;
#endif
case ':':
WITH_THR(sv_setiv(sv, (IV)PL_curcop->cop_arybase));
break;
case '|':
- sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
+ if (GvIOp(PL_defoutgv))
+ sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
break;
case ',':
break;
int
Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg)
{
+ dVAR;
register char *s;
char *ptr;
STRLEN len, klen;
Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg)
{
STRLEN n_a;
+ (void)sv;
my_setenv(MgPV(mg,n_a),Nullch);
return 0;
}
int
Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg)
{
-#if defined(VMS)
+#if defined(VMS) || defined(EPOC) || defined(SYMBIAN)
Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
#else
if (PL_localizing) {
int
Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg)
{
+ dVAR;
#ifndef PERL_MICRO
-#if defined(VMS) || defined(EPOC)
+#if defined(VMS) || defined(EPOC) || defined(SYMBIAN)
Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
#else
# if defined(PERL_IMPLICIT_SYS) || defined(WIN32)
# endif
{
# ifndef PERL_USE_SAFE_PUTENV
+ if (!PL_use_safe_putenv) {
I32 i;
if (environ == PL_origenviron)
else
for (i = 0; environ[i]; i++)
safesysfree(environ[i]);
+ }
# endif /* PERL_USE_SAFE_PUTENV */
environ[0] = Nullch;
# endif /* PERL_IMPLICIT_SYS || WIN32 */
#endif /* VMS || EPOC */
#endif /* !PERL_MICRO */
+ (void)sv;
+ (void)mg;
return 0;
}
-#if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS)||defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
-static int sig_handlers_initted = 0;
-#endif
-#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
-static int sig_ignoring[SIG_SIZE]; /* which signals we are ignoring */
-#endif
-#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
-static int sig_defaulting[SIG_SIZE];
-#endif
-
#ifndef PERL_MICRO
#ifdef HAS_SIGPROCMASK
static void
Sighandler_t sigstate;
sigstate = rsignal_state(i);
#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
- if (sig_handlers_initted && sig_ignoring[i]) sigstate = SIG_IGN;
+ if (PL_sig_handlers_initted && PL_sig_ignoring[i]) sigstate = SIG_IGN;
#endif
#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
- if (sig_handlers_initted && sig_defaulting[i]) sigstate = SIG_DFL;
+ if (PL_sig_handlers_initted && PL_sig_defaulting[i]) sigstate = SIG_DFL;
#endif
/* cache state so we don't fetch it again */
if(sigstate == SIG_IGN)
/* XXX Some of this code was copied from Perl_magic_setsig. A little
* refactoring might be in order.
*/
- register char *s;
+ dVAR;
STRLEN n_a;
- SV* to_dec;
- s = MgPV(mg,n_a);
+ register const char *s = MgPV(mg,n_a);
+ (void)sv;
if (*s == '_') {
- SV** svp;
+ SV** svp = 0;
if (strEQ(s,"__DIE__"))
svp = &PL_diehook;
else if (strEQ(s,"__WARN__"))
svp = &PL_warnhook;
else
Perl_croak(aTHX_ "No such hook: %s", s);
- if (*svp) {
- to_dec = *svp;
+ if (svp && *svp) {
+ SV *to_dec = *svp;
*svp = 0;
SvREFCNT_dec(to_dec);
}
#endif
PERL_ASYNC_CHECK();
#if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
- if (!sig_handlers_initted) Perl_csighandler_init();
+ if (!PL_sig_handlers_initted) Perl_csighandler_init();
#endif
#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
- sig_defaulting[i] = 1;
+ PL_sig_defaulting[i] = 1;
(void)rsignal(i, PL_csighandlerp);
#else
(void)rsignal(i, SIG_DFL);
PL_psig_name[i]=0;
}
if(PL_psig_ptr[i]) {
- to_dec=PL_psig_ptr[i];
+ SV *to_dec=PL_psig_ptr[i];
PL_psig_ptr[i]=0;
LEAVE;
SvREFCNT_dec(to_dec);
return 0;
}
-void
-Perl_raise_signal(pTHX_ int sig)
+static void
+S_raise_signal(pTHX_ int sig)
{
/* Set a flag to say this signal is pending */
PL_psig_pend[sig]++;
#endif
#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
(void) rsignal(sig, PL_csighandlerp);
- if (sig_ignoring[sig]) return;
+ if (PL_sig_ignoring[sig]) return;
#endif
#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
- if (sig_defaulting[sig])
+ if (PL_sig_defaulting[sig])
#ifdef KILL_BY_SIGPRC
exit((Perl_sig_to_vmscondition(sig)&STS$M_COND_ID)|STS$K_SEVERE|STS$M_INHIB_MSG);
#else
* with risk we may be in malloc() etc. */
(*PL_sighandlerp)(sig);
else
- Perl_raise_signal(aTHX_ sig);
+ S_raise_signal(aTHX_ sig);
}
#if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
Perl_csighandler_init(void)
{
int sig;
- if (sig_handlers_initted) return;
+ if (PL_sig_handlers_initted) return;
for (sig = 1; sig < SIG_SIZE; sig++) {
#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
dTHX;
- sig_defaulting[sig] = 1;
+ PL_sig_defaulting[sig] = 1;
(void) rsignal(sig, PL_csighandlerp);
#endif
#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
- sig_ignoring[sig] = 0;
+ PL_sig_ignoring[sig] = 0;
#endif
}
- sig_handlers_initted = 1;
+ PL_sig_handlers_initted = 1;
}
#endif
int
Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg)
{
- register char *s;
+ dVAR;
I32 i;
SV** svp = 0;
/* Need to be careful with SvREFCNT_dec(), because that can have side
SV* save_sv;
#endif
- s = MgPV(mg,len);
+ register const char *s = MgPV(mg,len);
if (*s == '_') {
if (strEQ(s,"__DIE__"))
svp = &PL_diehook;
#endif
PERL_ASYNC_CHECK();
#if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
- if (!sig_handlers_initted) Perl_csighandler_init();
+ if (!PL_sig_handlers_initted) Perl_csighandler_init();
#endif
#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
- sig_ignoring[i] = 0;
+ PL_sig_ignoring[i] = 0;
#endif
#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
- sig_defaulting[i] = 0;
+ PL_sig_defaulting[i] = 0;
#endif
SvREFCNT_dec(PL_psig_name[i]);
to_dec = PL_psig_ptr[i];
if (strEQ(s,"IGNORE")) {
if (i) {
#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
- sig_ignoring[i] = 1;
+ PL_sig_ignoring[i] = 1;
(void)rsignal(i, PL_csighandlerp);
#else
(void)rsignal(i, SIG_IGN);
if (i)
#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
{
- sig_defaulting[i] = 1;
+ PL_sig_defaulting[i] = 1;
(void)rsignal(i, PL_csighandlerp);
}
#else
int
Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg)
{
+ (void)sv;
+ (void)mg;
PL_sub_generation++;
return 0;
}
int
Perl_magic_setamagic(pTHX_ SV *sv, MAGIC *mg)
{
+ (void)sv;
+ (void)mg;
/* HV_badAMAGIC_on(Sv_STASH(sv)); */
PL_amagic_generation++;
int
Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg)
{
- HV *hv = (HV*)LvTARG(sv);
+ HV * const hv = (HV*)LvTARG(sv);
I32 i = 0;
+ (void)mg;
if (hv) {
(void) hv_iterinit(hv);
int
Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg)
{
+ (void)mg;
if (LvTARG(sv)) {
hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
}
/* caller is responsible for stack switching/cleanup */
STATIC int
-S_magic_methcall(pTHX_ SV *sv, MAGIC *mg, char *meth, I32 flags, int n, SV *val)
+S_magic_methcall(pTHX_ SV *sv, const MAGIC *mg, const char *meth, I32 flags, int n, SV *val)
{
dSP;
}
STATIC int
-S_magic_methpack(pTHX_ SV *sv, MAGIC *mg, char *meth)
+S_magic_methpack(pTHX_ SV *sv, const MAGIC *mg, const char *meth)
{
- dSP;
+ dVAR; dSP;
ENTER;
SAVETMPS;
int
Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg)
{
- magic_methpack(sv,mg,"FETCH");
if (mg->mg_ptr)
mg->mg_flags |= MGf_GSKIP;
+ magic_methpack(sv,mg,"FETCH");
return 0;
}
int
Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg)
{
- dSP;
+ dVAR; dSP;
ENTER;
PUSHSTACKi(PERLSI_MAGIC);
magic_methcall(sv, mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
U32
Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg)
{
- dSP;
+ dVAR; dSP;
U32 retval = 0;
ENTER;
int
Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg)
{
- dSP;
+ dVAR; dSP;
ENTER;
PUSHSTACKi(PERLSI_MAGIC);
call_method("CLEAR", G_SCALAR|G_DISCARD);
POPSTACK;
LEAVE;
+
return 0;
}
int
Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key)
{
- dSP;
- const char *meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
+ dVAR; dSP;
+ const char * const meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
ENTER;
SAVETMPS;
return magic_methpack(sv,mg,"EXISTS");
}
+SV *
+Perl_magic_scalarpack(pTHX_ HV *hv, MAGIC *mg)
+{
+ dVAR; dSP;
+ SV *retval = &PL_sv_undef;
+ SV *tied = SvTIED_obj((SV*)hv, mg);
+ HV *pkg = SvSTASH((SV*)SvRV(tied));
+
+ if (!gv_fetchmethod_autoload(pkg, "SCALAR", FALSE)) {
+ SV *key;
+ if (HvEITER(hv))
+ /* we are in an iteration so the hash cannot be empty */
+ return &PL_sv_yes;
+ /* no xhv_eiter so now use FIRSTKEY */
+ key = sv_newmortal();
+ magic_nextpack((SV*)hv, mg, key);
+ HvEITER(hv) = NULL; /* need to reset iterator */
+ return SvOK(key) ? &PL_sv_yes : &PL_sv_no;
+ }
+
+ /* there is a SCALAR method that we can call */
+ ENTER;
+ PUSHSTACKi(PERLSI_MAGIC);
+ PUSHMARK(SP);
+ EXTEND(SP, 1);
+ PUSHs(tied);
+ PUTBACK;
+
+ if (call_method("SCALAR", G_SCALAR))
+ retval = *PL_stack_sp--;
+ POPSTACK;
+ LEAVE;
+ return retval;
+}
+
int
Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg)
{
return 0;
}
}
- (void)SvOK_off(sv);
+ SvOK_off(sv);
return 0;
}
int
Perl_magic_getglob(pTHX_ SV *sv, MAGIC *mg)
{
+ (void)mg;
if (SvFAKE(sv)) { /* FAKE globs can get coerced */
SvFAKE_off(sv);
gv_efullname3(sv,((GV*)sv), "*");
int
Perl_magic_setglob(pTHX_ SV *sv, MAGIC *mg)
{
- register char *s;
GV* gv;
- STRLEN n_a;
-
+ (void)mg;
+
if (!SvOK(sv))
return 0;
- s = SvPV(sv, n_a);
- if (*s == '*' && s[1])
- s++;
- gv = gv_fetchpv(s,TRUE, SVt_PVGV);
+ gv = gv_fetchsv(sv,TRUE, SVt_PVGV);
if (sv == (SV*)gv)
return 0;
if (GvGP(sv))
Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg)
{
STRLEN len;
- SV *lsv = LvTARG(sv);
- char *tmps = SvPV(lsv,len);
+ SV * const lsv = LvTARG(sv);
+ const char * const tmps = SvPV(lsv,len);
I32 offs = LvTARGOFF(sv);
I32 rem = LvTARGLEN(sv);
+ (void)mg;
if (SvUTF8(lsv))
sv_pos_u2b(lsv, &offs, &rem);
{
STRLEN len;
char *tmps = SvPV(sv, len);
- SV *lsv = LvTARG(sv);
+ SV * const lsv = LvTARG(sv);
I32 lvoff = LvTARGOFF(sv);
I32 lvlen = LvTARGLEN(sv);
+ (void)mg;
if (DO_UTF8(sv)) {
sv_utf8_upgrade(lsv);
sv_pos_u2b(lsv, &lvoff, &lvlen);
sv_insert(lsv, lvoff, lvlen, tmps, len);
+ LvTARGLEN(sv) = sv_len_utf8(sv);
SvUTF8_on(lsv);
}
else if (lsv && SvUTF8(lsv)) {
sv_pos_u2b(lsv, &lvoff, &lvlen);
+ LvTARGLEN(sv) = len;
tmps = (char*)bytes_to_utf8((U8*)tmps, &len);
sv_insert(lsv, lvoff, lvlen, tmps, len);
Safefree(tmps);
}
- else
- sv_insert(lsv, lvoff, lvlen, tmps, len);
+ else {
+ sv_insert(lsv, lvoff, lvlen, tmps, len);
+ LvTARGLEN(sv) = len;
+ }
+
return 0;
}
int
Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg)
{
+ (void)sv;
if (PL_localizing) {
if (PL_localizing == 1)
mg->mg_len <<= 1;
int
Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg)
{
- SV *lsv = LvTARG(sv);
+ SV * const lsv = LvTARG(sv);
+ (void)mg;
if (!lsv) {
- (void)SvOK_off(sv);
+ SvOK_off(sv);
return 0;
}
int
Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg)
{
+ (void)mg;
do_vecset(sv); /* XXX slurp this routine */
return 0;
}
int
Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg)
{
+ (void)mg;
if (LvTARGLEN(sv))
vivify_defelem(sv);
if (LvTARG(sv)) {
AV *av = (AV*)mg->mg_obj;
SV **svp = AvARRAY(av);
I32 i = AvFILLp(av);
+ (void)sv;
+
while (i >= 0) {
- if (svp[i] && svp[i] != &PL_sv_undef) {
+ if (svp[i]) {
if (!SvWEAKREF(svp[i]))
Perl_croak(aTHX_ "panic: magic_killbackrefs");
/* XXX Should we check that it hasn't changed? */
- SvRV(svp[i]) = 0;
- (void)SvOK_off(svp[i]);
+ SvRV_set(svp[i], 0);
+ SvOK_off(svp[i]);
SvWEAKREF_off(svp[i]);
- svp[i] = &PL_sv_undef;
+ svp[i] = Nullsv;
}
i--;
}
int
Perl_magic_setbm(pTHX_ SV *sv, MAGIC *mg)
{
+ (void)mg;
sv_unmagic(sv, PERL_MAGIC_bm);
SvVALID_off(sv);
return 0;
int
Perl_magic_setfm(pTHX_ SV *sv, MAGIC *mg)
{
+ (void)mg;
sv_unmagic(sv, PERL_MAGIC_fm);
SvCOMPILED_off(sv);
return 0;
int
Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg)
{
- struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
+ const struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr;
if (uf && uf->uf_set)
(*uf->uf_set)(aTHX_ uf->uf_index, sv);
int
Perl_magic_setregexp(pTHX_ SV *sv, MAGIC *mg)
{
+ (void)mg;
sv_unmagic(sv, PERL_MAGIC_qr);
return 0;
}
{
regexp *re = (regexp *)mg->mg_obj;
ReREFCNT_dec(re);
+ (void)sv;
return 0;
}
* RenE<eacute> Descartes said "I think not."
* and vanished with a faint plop.
*/
+ (void)sv;
if (mg->mg_ptr) {
Safefree(mg->mg_ptr);
mg->mg_ptr = NULL;
int
Perl_magic_setutf8(pTHX_ SV *sv, MAGIC *mg)
{
+ (void)sv;
Safefree(mg->mg_ptr); /* The mg_ptr holds the pos cache. */
mg->mg_ptr = 0;
mg->mg_len = -1; /* The mg_len holds the len cache. */
int
Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
{
- register char *s;
+ register const char *s;
I32 i;
STRLEN len;
switch (*mg->mg_ptr) {
case '\004': /* ^D */
#ifdef DEBUGGING
s = SvPV_nolen(sv);
- PL_debug = get_debug_opts(&s) | DEBUG_TOP_FLAG;
+ PL_debug = get_debug_opts(&s, 0) | DEBUG_TOP_FLAG;
DEBUG_x(dump_all());
#else
PL_debug = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) | DEBUG_TOP_FLAG;
if (PL_inplace)
Safefree(PL_inplace);
if (SvOK(sv))
- PL_inplace = savepv(SvPV(sv,len));
+ PL_inplace = savesvpv(sv);
else
PL_inplace = Nullch;
break;
case '\017': /* ^O */
if (*(mg->mg_ptr+1) == '\0') {
- if (PL_osname)
+ if (PL_osname) {
Safefree(PL_osname);
- if (SvOK(sv))
- PL_osname = savepv(SvPV(sv,len));
- else
PL_osname = Nullch;
+ }
+ if (SvOK(sv)) {
+ TAINT_PROPER("assigning to $^O");
+ PL_osname = savesvpv(sv);
+ }
}
else if (strEQ(mg->mg_ptr, "\017PEN")) {
if (!PL_compiling.cop_io)
STRLEN len, i;
int accumulate = 0 ;
int any_fatals = 0 ;
- char * ptr = (char*)SvPV(sv, len) ;
+ const char * const ptr = (char*)SvPV(sv, len) ;
for (i = 0 ; i < len ; ++i) {
accumulate |= ptr[i] ;
any_fatals |= (ptr[i] & 0xAA) ;
break;
case '^':
Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
- IoTOP_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,len));
- IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
+ s = IoTOP_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
+ IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv,TRUE, SVt_PVIO);
break;
case '~':
Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
- IoFMT_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,len));
- IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
+ s = IoFMT_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
+ IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv,TRUE, SVt_PVIO);
break;
case '=':
IoPAGE_LEN(GvIOp(PL_defoutgv)) = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
case '#':
if (PL_ofmt)
Safefree(PL_ofmt);
- PL_ofmt = savepv(SvPV(sv,len));
+ PL_ofmt = savesvpv(sv);
break;
case '[':
PL_compiling.cop_arybase = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
#ifdef HAS_SETRESUID
(void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1);
#else
- if (PL_uid == PL_euid) /* special case $< = $> */
+ if (PL_uid == PL_euid) { /* special case $< = $> */
+#ifdef PERL_DARWIN
+ /* workaround for Darwin's setuid peculiarity, cf [perl #24122] */
+ if (PL_uid != 0 && PerlProc_getuid() == 0)
+ (void)PerlProc_setuid(0);
+#endif
(void)PerlProc_setuid(PL_uid);
- else {
+ } else {
PL_uid = PerlProc_getuid();
Perl_croak(aTHX_ "setruid() not implemented");
}
case ')':
#ifdef HAS_SETGROUPS
{
- char *p = SvPV(sv, len);
+ const char *p = SvPV(sv, len);
Groups_t gary[NGROUPS];
while (isSPACE(*p))
{
union pstun un;
s = SvPV(sv, len);
- un.pst_command = s;
+ un.pst_command = (char *)s;
pstat(PSTAT_SETCMD, un, len, 0, 0);
}
#endif
/* PL_origalen is set in perl_parse(). */
s = SvPV_force(sv,len);
- if (len >= (STRLEN)PL_origalen) {
- /* Longer than original, will be truncated. */
- Copy(s, PL_origargv[0], PL_origalen, char);
- PL_origargv[0][PL_origalen - 1] = 0;
+ if (len >= (STRLEN)PL_origalen-1) {
+ /* Longer than original, will be truncated. We assume that
+ * PL_origalen bytes are available. */
+ Copy(s, PL_origargv[0], PL_origalen-1, char);
}
else {
/* Shorter than original, will be padded. */
* --jhi */
(int)' ',
PL_origalen - len - 1);
- for (i = 1; i < PL_origargc; i++)
- PL_origargv[i] = 0;
}
+ PL_origargv[0][PL_origalen-1] = 0;
+ for (i = 1; i < PL_origargc; i++)
+ PL_origargv[i] = 0;
UNLOCK_DOLLARZERO_MUTEX;
break;
#endif
}
I32
-Perl_whichsig(pTHX_ char *sig)
+Perl_whichsig(pTHX_ const char *sig)
{
- register char **sigv;
+ register char* const* sigv;
- for (sigv = PL_sig_name; *sigv; sigv++)
+ for (sigv = (char* const*)PL_sig_name; *sigv; sigv++)
if (strEQ(sig,*sigv))
- return PL_sig_num[sigv - PL_sig_name];
+ return PL_sig_num[sigv - (char* const*)PL_sig_name];
#ifdef SIGCLD
if (strEQ(sig,"CHLD"))
return SIGCLD;
return -1;
}
-#if !defined(PERL_IMPLICIT_CONTEXT)
-static SV* sig_sv;
-#endif
-
Signal_t
Perl_sighandler(int sig)
{
flags |= 1;
if (PL_markstack_ptr < PL_markstack_max - 2)
flags |= 4;
- if (PL_retstack_ix < PL_retstack_max - 2)
- flags |= 8;
if (PL_scopestack_ix < PL_scopestack_max - 3)
flags |= 16;
}
if (flags & 4)
PL_markstack_ptr++; /* Protect mark. */
- if (flags & 8) {
- PL_retstack_ix++;
- PL_retstack[PL_retstack_ix] = NULL;
- }
if (flags & 16)
PL_scopestack_ix += 1;
/* sv_2cv is too complicated, try a simpler variant first: */
sv = SvREFCNT_inc(PL_psig_name[sig]);
flags |= 64;
#if !defined(PERL_IMPLICIT_CONTEXT)
- sig_sv = sv;
+ PL_sig_sv = sv;
#endif
} else {
sv = sv_newmortal();
(void)rsignal(sig, PL_csighandlerp);
#endif
#endif /* !PERL_MICRO */
- Perl_die(aTHX_ Nullformat);
+ DieNull;
}
cleanup:
if (flags & 1)
PL_savestack_ix -= 8; /* Unprotect save in progress. */
if (flags & 4)
PL_markstack_ptr--;
- if (flags & 8)
- PL_retstack_ix--;
if (flags & 16)
PL_scopestack_ix -= 1;
if (flags & 64)
static void
-restore_magic(pTHX_ void *p)
+restore_magic(pTHX_ const void *p)
{
MGS* mgs = SSPTR(PTR2IV(p), MGS*);
SV* sv = mgs->mgs_sv;
if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
{
+#ifdef PERL_COPY_ON_WRITE
+ /* While magic was saved (and off) sv_setsv may well have seen
+ this SV as a prime candidate for COW. */
+ if (SvIsCOW(sv))
+ sv_force_normal(sv);
+#endif
+
if (mgs->mgs_flags)
SvFLAGS(sv) |= mgs->mgs_flags;
else
}
static void
-unwind_handler_stack(pTHX_ void *p)
+unwind_handler_stack(pTHX_ const void *p)
{
- U32 flags = *(U32*)p;
+ dVAR;
+ const U32 flags = *(const U32*)p;
if (flags & 1)
PL_savestack_ix -= 5; /* Unprotect save in progress. */
/* cxstack_ix-- Not needed, die already unwound it. */
#if !defined(PERL_IMPLICIT_CONTEXT)
if (flags & 64)
- SvREFCNT_dec(sig_sv);
+ SvREFCNT_dec(PL_sig_sv);
#endif
}
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