X-Git-Url: https://perl5.git.perl.org/perl5.git/blobdiff_plain/4e205ed637fa853d115099170e6e11407ca49619..473d7a83d65393ce327ccad2c8d257d8dbf6c6ae:/util.c

diff --git a/util.c b/util.c
index 3294dba..b7e1cce 100644
--- a/util.c
+++ b/util.c
@@ -362,6 +362,8 @@ Perl_delimcpy(pTHX_ register char *to, register const char *toend, register cons
     register I32 tolen;
     PERL_UNUSED_CONTEXT;
 
+    PERL_ARGS_ASSERT_DELIMCPY;
+
     for (tolen = 0; from < fromend; from++, tolen++) {
 	if (*from == '\\') {
 	    if (from[1] != delim) {
@@ -391,6 +393,8 @@ Perl_instr(pTHX_ register const char *big, register const char *little)
     register I32 first;
     PERL_UNUSED_CONTEXT;
 
+    PERL_ARGS_ASSERT_INSTR;
+
     if (!little)
 	return (char*)big;
     first = *little++;
@@ -421,11 +425,12 @@ Perl_instr(pTHX_ register const char *big, register const char *little)
 char *
 Perl_ninstr(pTHX_ const char *big, const char *bigend, const char *little, const char *lend)
 {
+    PERL_ARGS_ASSERT_NINSTR;
     PERL_UNUSED_CONTEXT;
     if (little >= lend)
         return (char*)big;
     {
-        char first = *little++;
+        const char first = *little++;
         const char *s, *x;
         bigend -= lend - little;
     OUTER:
@@ -452,6 +457,8 @@ Perl_rninstr(pTHX_ register const char *big, const char *bigend, const char *lit
     register const char * const littleend = lend;
     PERL_UNUSED_CONTEXT;
 
+    PERL_ARGS_ASSERT_RNINSTR;
+
     if (little >= littleend)
 	return (char*)bigend;
     bigbeg = big;
@@ -501,6 +508,8 @@ Perl_fbm_compile(pTHX_ SV *sv, U32 flags)
     U32 rarest = 0;
     U32 frequency = 256;
 
+    PERL_ARGS_ASSERT_FBM_COMPILE;
+
     if (flags & FBMcf_TAIL) {
 	MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ? mg_find(sv, PERL_MAGIC_utf8) : NULL;
 	sv_catpvs(sv, "\n");		/* Taken into account in fbm_instr() */
@@ -578,6 +587,8 @@ Perl_fbm_instr(pTHX_ unsigned char *big, register unsigned char *bigend, SV *lit
     register STRLEN littlelen = l;
     register const I32 multiline = flags & FBMrf_MULTILINE;
 
+    PERL_ARGS_ASSERT_FBM_INSTR;
+
     if ((STRLEN)(bigend - big) < littlelen) {
 	if ( SvTAIL(littlestr)
 	     && ((STRLEN)(bigend - big) == littlelen - 1)
@@ -781,6 +792,8 @@ Perl_screaminstr(pTHX_ SV *bigstr, SV *littlestr, I32 start_shift, I32 end_shift
     register const unsigned char *littleend;
     I32 found = 0;
 
+    PERL_ARGS_ASSERT_SCREAMINSTR;
+
     assert(SvTYPE(littlestr) == SVt_PVGV);
     assert(SvVALID(littlestr));
 
@@ -864,6 +877,8 @@ Perl_ibcmp(pTHX_ const char *s1, const char *s2, register I32 len)
     register const U8 *b = (const U8 *)s2;
     PERL_UNUSED_CONTEXT;
 
+    PERL_ARGS_ASSERT_IBCMP;
+
     while (len--) {
 	if (*a != *b && *a != PL_fold[*b])
 	    return 1;
@@ -880,6 +895,8 @@ Perl_ibcmp_locale(pTHX_ const char *s1, const char *s2, register I32 len)
     register const U8 *b = (const U8 *)s2;
     PERL_UNUSED_CONTEXT;
 
+    PERL_ARGS_ASSERT_IBCMP_LOCALE;
+
     while (len--) {
 	if (*a != *b && *a != PL_fold_locale[*b])
 	    return 1;
@@ -985,7 +1002,9 @@ char *
 Perl_savesharedpvn(pTHX_ const char *const pv, const STRLEN len)
 {
     char *const newaddr = (char*)PerlMemShared_malloc(len + 1);
-    assert(pv);
+
+    PERL_ARGS_ASSERT_SAVESHAREDPVN;
+
     if (!newaddr) {
 	return write_no_mem();
     }
@@ -1009,6 +1028,8 @@ Perl_savesvpv(pTHX_ SV *sv)
     const char * const pv = SvPV_const(sv, len);
     register char *newaddr;
 
+    PERL_ARGS_ASSERT_SAVESVPV;
+
     ++len;
     Newx(newaddr,len,char);
     return (char *) CopyD(pv,newaddr,len,char);
@@ -1025,7 +1046,7 @@ S_mess_alloc(pTHX)
     XPVMG *any;
 
     if (!PL_dirty)
-	return sv_2mortal(newSVpvs(""));
+	return newSVpvs_flags("", SVs_TEMP);
 
     if (PL_mess_sv)
 	return PL_mess_sv;
@@ -1048,6 +1069,7 @@ Perl_form_nocontext(const char* pat, ...)
     dTHX;
     char *retval;
     va_list args;
+    PERL_ARGS_ASSERT_FORM_NOCONTEXT;
     va_start(args, pat);
     retval = vform(pat, &args);
     va_end(args);
@@ -1080,6 +1102,7 @@ Perl_form(pTHX_ const char* pat, ...)
 {
     char *retval;
     va_list args;
+    PERL_ARGS_ASSERT_FORM;
     va_start(args, pat);
     retval = vform(pat, &args);
     va_end(args);
@@ -1090,6 +1113,7 @@ char *
 Perl_vform(pTHX_ const char *pat, va_list *args)
 {
     SV * const sv = mess_alloc();
+    PERL_ARGS_ASSERT_VFORM;
     sv_vsetpvfn(sv, pat, strlen(pat), args, NULL, 0, NULL);
     return SvPVX(sv);
 }
@@ -1101,6 +1125,7 @@ Perl_mess_nocontext(const char *pat, ...)
     dTHX;
     SV *retval;
     va_list args;
+    PERL_ARGS_ASSERT_MESS_NOCONTEXT;
     va_start(args, pat);
     retval = vmess(pat, &args);
     va_end(args);
@@ -1113,6 +1138,7 @@ Perl_mess(pTHX_ const char *pat, ...)
 {
     SV *retval;
     va_list args;
+    PERL_ARGS_ASSERT_MESS;
     va_start(args, pat);
     retval = vmess(pat, &args);
     va_end(args);
@@ -1125,6 +1151,8 @@ S_closest_cop(pTHX_ const COP *cop, const OP *o)
     dVAR;
     /* Look for PL_op starting from o.  cop is the last COP we've seen. */
 
+    PERL_ARGS_ASSERT_CLOSEST_COP;
+
     if (!o || o == PL_op)
 	return cop;
 
@@ -1158,6 +1186,8 @@ Perl_vmess(pTHX_ const char *pat, va_list *args)
     dVAR;
     SV * const sv = mess_alloc();
 
+    PERL_ARGS_ASSERT_VMESS;
+
     sv_vsetpvfn(sv, pat, strlen(pat), args, NULL, 0, NULL);
     if (!SvCUR(sv) || *(SvEND(sv) - 1) != '\n') {
 	/*
@@ -1199,6 +1229,8 @@ Perl_write_to_stderr(pTHX_ const char* message, int msglen)
     IO *io;
     MAGIC *mg;
 
+    PERL_ARGS_ASSERT_WRITE_TO_STDERR;
+
     if (PL_stderrgv && SvREFCNT(PL_stderrgv) 
 	&& (io = GvIO(PL_stderrgv))
 	&& (mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar))) 
@@ -1216,7 +1248,7 @@ Perl_write_to_stderr(pTHX_ const char* message, int msglen)
 	PUSHMARK(SP);
 	EXTEND(SP,2);
 	PUSHs(SvTIED_obj((SV*)io, mg));
-	PUSHs(sv_2mortal(newSVpvn(message, msglen)));
+	mPUSHp(message, msglen);
 	PUTBACK;
 	call_method("PRINT", G_SCALAR);
 
@@ -1270,8 +1302,7 @@ S_vdie_common(pTHX_ const char *message, STRLEN msglen, I32 utf8, bool warn)
 	    *hook = NULL;
 	}
 	if (warn || message) {
-	    msg = newSVpvn(message, msglen);
-	    SvFLAGS(msg) |= utf8;
+	    msg = newSVpvn_flags(message, msglen, utf8);
 	    SvREADONLY_on(msg);
 	    SAVEFREESV(msg);
 	}
@@ -1354,6 +1385,7 @@ Perl_die_nocontext(const char* pat, ...)
     dTHX;
     OP *o;
     va_list args;
+    PERL_ARGS_ASSERT_DIE_NOCONTEXT;
     va_start(args, pat);
     o = vdie(pat, &args);
     va_end(args);
@@ -1400,6 +1432,7 @@ Perl_croak_nocontext(const char *pat, ...)
 {
     dTHX;
     va_list args;
+    PERL_ARGS_ASSERT_CROAK_NOCONTEXT;
     va_start(args, pat);
     vcroak(pat, &args);
     /* NOTREACHED */
@@ -1446,6 +1479,8 @@ Perl_vwarn(pTHX_ const char* pat, va_list *args)
     const I32 utf8 = SvUTF8(msv);
     const char * const message = SvPV_const(msv, msglen);
 
+    PERL_ARGS_ASSERT_VWARN;
+
     if (PL_warnhook) {
 	if (vdie_common(message, msglen, utf8, TRUE))
 	    return;
@@ -1460,6 +1495,7 @@ Perl_warn_nocontext(const char *pat, ...)
 {
     dTHX;
     va_list args;
+    PERL_ARGS_ASSERT_WARN_NOCONTEXT;
     va_start(args, pat);
     vwarn(pat, &args);
     va_end(args);
@@ -1479,6 +1515,7 @@ void
 Perl_warn(pTHX_ const char *pat, ...)
 {
     va_list args;
+    PERL_ARGS_ASSERT_WARN;
     va_start(args, pat);
     vwarn(pat, &args);
     va_end(args);
@@ -1490,6 +1527,7 @@ Perl_warner_nocontext(U32 err, const char *pat, ...)
 {
     dTHX; 
     va_list args;
+    PERL_ARGS_ASSERT_WARNER_NOCONTEXT;
     va_start(args, pat);
     vwarner(err, pat, &args);
     va_end(args);
@@ -1500,6 +1538,7 @@ void
 Perl_warner(pTHX_ U32  err, const char* pat,...)
 {
     va_list args;
+    PERL_ARGS_ASSERT_WARNER;
     va_start(args, pat);
     vwarner(err, pat, &args);
     va_end(args);
@@ -1509,6 +1548,7 @@ void
 Perl_vwarner(pTHX_ U32  err, const char* pat, va_list* args)
 {
     dVAR;
+    PERL_ARGS_ASSERT_VWARNER;
     if (PL_warnhook == PERL_WARNHOOK_FATAL || ckDEAD(err)) {
 	SV * const msv = vmess(pat, args);
 	STRLEN msglen;
@@ -1590,6 +1630,7 @@ Perl_new_warnings_bitfield(pTHX_ STRLEN *buffer, const char *const bits,
 			   STRLEN size) {
     const MEM_SIZE len_wanted = sizeof(STRLEN) + size;
     PERL_UNUSED_CONTEXT;
+    PERL_ARGS_ASSERT_NEW_WARNINGS_BITFIELD;
 
     buffer = (STRLEN*)
 	(specialWARN(buffer) ?
@@ -1737,6 +1778,8 @@ Perl_setenv_getix(pTHX_ const char *nam)
 {
     register I32 i;
     register const I32 len = strlen(nam);
+
+    PERL_ARGS_ASSERT_SETENV_GETIX;
     PERL_UNUSED_CONTEXT;
 
     for (i = 0; environ[i]; i++) {
@@ -1761,6 +1804,8 @@ Perl_unlnk(pTHX_ const char *f)	/* unlink all versions of a file */
 {
     I32 retries = 0;
 
+    PERL_ARGS_ASSERT_UNLNK;
+
     while (PerlLIO_unlink(f) >= 0)
 	retries++;
     return retries ? 0 : -1;
@@ -1774,6 +1819,8 @@ Perl_my_bcopy(register const char *from,register char *to,register I32 len)
 {
     char * const retval = to;
 
+    PERL_ARGS_ASSERT_MY_BCOPY;
+
     if (from - to >= 0) {
 	while (len--)
 	    *to++ = *from++;
@@ -1795,6 +1842,8 @@ Perl_my_memset(register char *loc, register I32 ch, register I32 len)
 {
     char * const retval = loc;
 
+    PERL_ARGS_ASSERT_MY_MEMSET;
+
     while (len--)
 	*loc++ = ch;
     return retval;
@@ -1808,6 +1857,8 @@ Perl_my_bzero(register char *loc, register I32 len)
 {
     char * const retval = loc;
 
+    PERL_ARGS_ASSERT_MY_BZERO;
+
     while (len--)
 	*loc++ = 0;
     return retval;
@@ -1823,6 +1874,8 @@ Perl_my_memcmp(const char *s1, const char *s2, register I32 len)
     register const U8 *b = (const U8 *)s2;
     register I32 tmp;
 
+    PERL_ARGS_ASSERT_MY_MEMCMP;
+
     while (len--) {
         if ((tmp = *a++ - *b++))
 	    return tmp;
@@ -2206,6 +2259,8 @@ Perl_my_swabn(void *ptr, int n)
     register char *e = s + (n-1);
     register char tc;
 
+    PERL_ARGS_ASSERT_MY_SWABN;
+
     for (n /= 2; n > 0; s++, e--, n--) {
       tc = *s;
       *s = *e;
@@ -2214,7 +2269,7 @@ Perl_my_swabn(void *ptr, int n)
 }
 
 PerlIO *
-Perl_my_popen_list(pTHX_ char *mode, int n, SV **args)
+Perl_my_popen_list(pTHX_ const char *mode, int n, SV **args)
 {
 #if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(OS2) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL) && !defined(NETWARE) && !defined(__LIBCATAMOUNT__)
     dVAR;
@@ -2225,6 +2280,8 @@ Perl_my_popen_list(pTHX_ char *mode, int n, SV **args)
     I32 did_pipes = 0;
     int pp[2];
 
+    PERL_ARGS_ASSERT_MY_POPEN_LIST;
+
     PERL_FLUSHALL_FOR_CHILD;
     This = (*mode == 'w');
     that = !This;
@@ -2365,6 +2422,8 @@ Perl_my_popen(pTHX_ const char *cmd, const char *mode)
     I32 did_pipes = 0;
     int pp[2];
 
+    PERL_ARGS_ASSERT_MY_POPEN;
+
     PERL_FLUSHALL_FOR_CHILD;
 #ifdef OS2
     if (doexec) {
@@ -2513,6 +2572,7 @@ FILE *popen();
 PerlIO *
 Perl_my_popen(pTHX_ const char *cmd, const char *mode)
 {
+    PERL_ARGS_ASSERT_MY_POPEN;
     PERL_FLUSHALL_FOR_CHILD;
     /* Call system's popen() to get a FILE *, then import it.
        used 0 for 2nd parameter to PerlIO_importFILE;
@@ -2598,11 +2658,13 @@ Perl_my_fork(void)
 
 #ifdef DUMP_FDS
 void
-Perl_dump_fds(pTHX_ char *s)
+Perl_dump_fds(pTHX_ const char *const s)
 {
     int fd;
     Stat_t tmpstatbuf;
 
+    PERL_ARGS_ASSERT_DUMP_FDS;
+
     PerlIO_printf(Perl_debug_log,"%s", s);
     for (fd = 0; fd < 32; fd++) {
 	if (PerlLIO_fstat(fd,&tmpstatbuf) >= 0)
@@ -2702,6 +2764,8 @@ Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
     dVAR;
     struct sigaction act;
 
+    PERL_ARGS_ASSERT_RSIGNAL_SAVE;
+
 #ifdef USE_ITHREADS
     /* only "parent" interpreter can diddle signals */
     if (PL_curinterp != aTHX)
@@ -2874,6 +2938,7 @@ Perl_wait4pid(pTHX_ Pid_t pid, int *statusp, int flags)
 {
     dVAR;
     I32 result = 0;
+    PERL_ARGS_ASSERT_WAIT4PID;
     if (!pid)
 	return -1;
 #ifdef PERL_USES_PL_PIDSTATUS
@@ -3004,6 +3069,8 @@ Perl_repeatcpy(pTHX_ register char *to, register const char *from, I32 len, regi
     register const char * const frombase = from;
     PERL_UNUSED_CONTEXT;
 
+    PERL_ARGS_ASSERT_REPEATCPY;
+
     if (len == 1) {
 	register const char c = *from;
 	while (count-- > 0)
@@ -3028,6 +3095,8 @@ Perl_same_dirent(pTHX_ const char *a, const char *b)
     Stat_t tmpstatbuf2;
     SV * const tmpsv = sv_newmortal();
 
+    PERL_ARGS_ASSERT_SAME_DIRENT;
+
     if (fa)
 	fa++;
     else
@@ -3090,6 +3159,8 @@ Perl_find_script(pTHX_ const char *scriptname, bool dosearch,
 #  define MAX_EXT_LEN 0
 #endif
 
+    PERL_ARGS_ASSERT_FIND_SCRIPT;
+
     /*
      * If dosearch is true and if scriptname does not contain path
      * delimiters, search the PATH for scriptname.
@@ -3318,6 +3389,7 @@ void
 Perl_set_context(void *t)
 {
     dVAR;
+    PERL_ARGS_ASSERT_SET_CONTEXT;
 #if defined(USE_ITHREADS)
 #  ifdef I_MACH_CTHREADS
     cthread_set_data(cthread_self(), t);
@@ -3382,6 +3454,7 @@ Perl_getenv_len(pTHX_ const char *env_elem, unsigned long *len)
 {
     char * const env_trans = PerlEnv_getenv(env_elem);
     PERL_UNUSED_CONTEXT;
+    PERL_ARGS_ASSERT_GETENV_LEN;
     if (env_trans)
 	*len = strlen(env_trans);
     return env_trans;
@@ -3679,11 +3752,13 @@ Perl_init_tm(pTHX_ struct tm *ptm)	/* see mktime, strftime and asctime */
 #ifdef HAS_TM_TM_ZONE
     Time_t now;
     const struct tm* my_tm;
+    PERL_ARGS_ASSERT_INIT_TM;
     (void)time(&now);
     my_tm = localtime(&now);
     if (my_tm)
         Copy(my_tm, ptm, 1, struct tm);
 #else
+    PERL_ARGS_ASSERT_INIT_TM;
     PERL_UNUSED_ARG(ptm);
 #endif
 }
@@ -3701,6 +3776,8 @@ Perl_mini_mktime(pTHX_ struct tm *ptm)
     int odd_cent, odd_year;
     PERL_UNUSED_CONTEXT;
 
+    PERL_ARGS_ASSERT_MINI_MKTIME;
+
 #define	DAYS_PER_YEAR	365
 #define	DAYS_PER_QYEAR	(4*DAYS_PER_YEAR+1)
 #define	DAYS_PER_CENT	(25*DAYS_PER_QYEAR-1)
@@ -3895,6 +3972,8 @@ Perl_my_strftime(pTHX_ const char *fmt, int sec, int min, int hour, int mday, in
   struct tm mytm;
   int len;
 
+  PERL_ARGS_ASSERT_MY_STRFTIME;
+
   init_tm(&mytm);	/* XXX workaround - see init_tm() above */
   mytm.tm_sec = sec;
   mytm.tm_min = min;
@@ -4002,6 +4081,8 @@ Perl_getcwd_sv(pTHX_ register SV *sv)
     SvTAINTED_on(sv);
 #endif
 
+    PERL_ARGS_ASSERT_GETCWD_SV;
+
 #ifdef HAS_GETCWD
     {
 	char buf[MAXPATHLEN];
@@ -4174,6 +4255,9 @@ Perl_scan_version(pTHX_ const char *s, SV *rv, bool qv)
     bool vinf = FALSE;
     AV * const av = newAV();
     SV * const hv = newSVrv(rv, "version"); /* create an SV and upgrade the RV */
+
+    PERL_ARGS_ASSERT_SCAN_VERSION;
+
     (void)sv_upgrade(hv, SVt_PVHV); /* needs to be an HV type */
 
     while (isSPACE(*s)) /* leading whitespace is OK */
@@ -4374,6 +4458,7 @@ Perl_new_version(pTHX_ SV *ver)
 {
     dVAR;
     SV * const rv = newSV(0);
+    PERL_ARGS_ASSERT_NEW_VERSION;
     if ( sv_derived_from(ver,"version") ) /* can just copy directly */
     {
 	I32 key;
@@ -4459,6 +4544,8 @@ Perl_upg_version(pTHX_ SV *ver, bool qv)
     const MAGIC *mg;
 #endif
 
+    PERL_ARGS_ASSERT_UPG_VERSION;
+
     if ( SvNOK(ver) && !( SvPOK(ver) && sv_len(ver) == 3 ) )
     {
 	/* may get too much accuracy */ 
@@ -4551,6 +4638,9 @@ bool
 Perl_vverify(pTHX_ SV *vs)
 {
     SV *sv;
+
+    PERL_ARGS_ASSERT_VVERIFY;
+
     if ( SvROK(vs) )
 	vs = SvRV(vs);
 
@@ -4586,6 +4676,9 @@ Perl_vnumify(pTHX_ SV *vs)
     bool alpha = FALSE;
     SV * const sv = newSV(0);
     AV *av;
+
+    PERL_ARGS_ASSERT_VNUMIFY;
+
     if ( SvROK(vs) )
 	vs = SvRV(vs);
 
@@ -4664,6 +4757,9 @@ Perl_vnormal(pTHX_ SV *vs)
     bool alpha = FALSE;
     SV * const sv = newSV(0);
     AV *av;
+
+    PERL_ARGS_ASSERT_VNORMAL;
+
     if ( SvROK(vs) )
 	vs = SvRV(vs);
 
@@ -4719,6 +4815,9 @@ SV *
 Perl_vstringify(pTHX_ SV *vs)
 {
     SV *pv;
+
+    PERL_ARGS_ASSERT_VSTRINGIFY;
+
     if ( SvROK(vs) )
 	vs = SvRV(vs);
     
@@ -4750,6 +4849,9 @@ Perl_vcmp(pTHX_ SV *lhv, SV *rhv)
     I32 left = 0;
     I32 right = 0;
     AV *lav, *rav;
+
+    PERL_ARGS_ASSERT_VCMP;
+
     if ( SvROK(lhv) )
 	lhv = SvRV(lhv);
     if ( SvROK(rhv) )
@@ -5131,6 +5233,8 @@ Perl_parse_unicode_opts(pTHX_ const char **popt)
   const char *p = *popt;
   U32 opt = 0;
 
+  PERL_ARGS_ASSERT_PARSE_UNICODE_OPTS;
+
   if (*p) {
        if (isDIGIT(*p)) {
 	    opt = (U32) atoi(p);
@@ -5310,6 +5414,7 @@ Perl_stashpv_hvname_match(pTHX_ const COP *c, const HV *hv)
     const char * const stashpv = CopSTASHPV(c);
     const char * const name = HvNAME_get(hv);
     PERL_UNUSED_CONTEXT;
+    PERL_ARGS_ASSERT_STASHPV_HVNAME_MATCH;
 
     if (stashpv == name)
 	return TRUE;
@@ -5386,6 +5491,7 @@ Perl_init_global_struct(pTHX)
 void
 Perl_free_global_struct(pTHX_ struct perl_vars *plvarsp)
 {
+    PERL_ARGS_ASSERT_FREE_GLOBAL_STRUCT;
 # ifdef PERL_GLOBAL_STRUCT
 #  ifdef PERL_UNSET_VARS
     PERL_UNSET_VARS(plvarsp);
@@ -5584,6 +5690,7 @@ int
 Perl_my_sprintf(char *buffer, const char* pat, ...)
 {
     va_list args;
+    PERL_ARGS_ASSERT_MY_SPRINTF;
     va_start(args, pat);
     vsprintf(buffer, pat, args);
     va_end(args);
@@ -5609,6 +5716,7 @@ Perl_my_snprintf(char *buffer, const Size_t len, const char *format, ...)
     dTHX;
     int retval;
     va_list ap;
+    PERL_ARGS_ASSERT_MY_SNPRINTF;
     va_start(ap, format);
 #ifdef HAS_VSNPRINTF
     retval = vsnprintf(buffer, len, format, ap);
@@ -5640,6 +5748,9 @@ Perl_my_vsnprintf(char *buffer, const Size_t len, const char *format, va_list ap
     int retval;
 #ifdef NEED_VA_COPY
     va_list apc;
+
+    PERL_ARGS_ASSERT_MY_VSNPRINTF;
+
     Perl_va_copy(ap, apc);
 # ifdef HAS_VSNPRINTF
     retval = vsnprintf(buffer, len, format, apc);
@@ -5729,6 +5840,7 @@ Perl_my_cxt_init(pTHX_ int *index, size_t size)
 {
     dVAR;
     void *p;
+    PERL_ARGS_ASSERT_MY_CXT_INIT;
     if (*index == -1) {
 	/* this module hasn't been allocated an index yet */
 	MUTEX_LOCK(&PL_my_ctx_mutex);
@@ -5763,6 +5875,8 @@ Perl_my_cxt_index(pTHX_ const char *my_cxt_key)
     dVAR;
     int index;
 
+    PERL_ARGS_ASSERT_MY_CXT_INDEX;
+
     for (index = 0; index < PL_my_cxt_index; index++) {
 	const char *key = PL_my_cxt_keys[index];
 	/* try direct pointer compare first - there are chances to success,
@@ -5781,6 +5895,8 @@ Perl_my_cxt_init(pTHX_ const char *my_cxt_key, size_t size)
     void *p;
     int index;
 
+    PERL_ARGS_ASSERT_MY_CXT_INIT;
+
     index = Perl_my_cxt_index(aTHX_ my_cxt_key);
     if (index == -1) {
 	/* this module hasn't been allocated an index yet */
@@ -5867,6 +5983,8 @@ Perl_get_db_sub(pTHX_ SV **svp, CV *cv)
      * it's for informational purposes only.
      */
 
+    PERL_ARGS_ASSERT_GET_DB_SUB;
+
     save_item(dbsv);
     if (!PERLDB_SUB_NN) {
 	GV * const gv = CvGV(cv);
@@ -5914,17 +6032,15 @@ Perl_my_dirfd(pTHX_ DIR * dir) {
 REGEXP *
 Perl_get_re_arg(pTHX_ SV *sv) {
     SV    *tmpsv;
-    MAGIC *mg;
 
     if (sv) {
         if (SvMAGICAL(sv))
             mg_get(sv);
         if (SvROK(sv) &&
             (tmpsv = (SV*)SvRV(sv)) &&            /* assign deliberate */
-            SvTYPE(tmpsv) == SVt_PVMG &&
-            (mg = mg_find(tmpsv, PERL_MAGIC_qr))) /* assign deliberate */
+            SvTYPE(tmpsv) == SVt_REGEXP)
         {
-            return (REGEXP *)mg->mg_obj;
+            return (REGEXP*) tmpsv;
         }
     }