replace ckWARN macros with functions

[perl5.git] / proto.h

diff --git a/proto.h b/proto.h
index 8f8ab0a..fb8bc8a 100644 (file)
--- a/proto.h
+++ b/proto.h
@@ -35,7 +35,9 @@ PERL_CALLCONV int     perl_run(PerlInterpreter* interp)
                        __attribute__nonnull__(1);
 
 PERL_CALLCONV int      perl_parse(PerlInterpreter* interp, XSINIT_t xsinit, int argc, char** argv, char** env);
-PERL_CALLCONV bool     Perl_doing_taint(int argc, char** argv, char** env);
+PERL_CALLCONV bool     Perl_doing_taint(int argc, char** argv, char** env)
+                       __attribute__warn_unused_result__;
+
 #if defined(USE_ITHREADS)
 PERL_CALLCONV PerlInterpreter* perl_clone(PerlInterpreter* interp, UV flags);
 #  if defined(PERL_IMPLICIT_SYS)
@@ -57,7 +59,9 @@ PERL_CALLCONV Malloc_t        Perl_realloc(Malloc_t where, MEM_SIZE nbytes)
 
 PERL_CALLCONV Free_t   Perl_mfree(Malloc_t where);
 #if defined(MYMALLOC)
-PERL_CALLCONV MEM_SIZE Perl_malloced_size(void *p);
+PERL_CALLCONV MEM_SIZE Perl_malloced_size(void *p)
+                       __attribute__warn_unused_result__;
+
 #endif
 
 PERL_CALLCONV void*    Perl_get_context(void);
@@ -76,9 +80,7 @@ PERL_CALLCONV OP*     Perl_append_list(pTHX_ I32 optype, LISTOP* first, LISTOP* last
 PERL_CALLCONV I32      Perl_apply(pTHX_ I32 type, SV** mark, SV** sp);
 PERL_CALLCONV void     Perl_apply_attrs_string(pTHX_ const char *stashpv, CV *cv, const char *attrstr, STRLEN len);
 PERL_CALLCONV void     Perl_av_clear(pTHX_ AV* ar);
-PERL_CALLCONV SV*      Perl_av_delete(pTHX_ AV* ar, I32 key, I32 flags)
-                       __attribute__warn_unused_result__;
-
+PERL_CALLCONV SV*      Perl_av_delete(pTHX_ AV* ar, I32 key, I32 flags);
 PERL_CALLCONV bool     Perl_av_exists(pTHX_ AV* ar, I32 key)
                        __attribute__warn_unused_result__;
 
@@ -100,9 +102,7 @@ PERL_CALLCONV AV*   Perl_av_make(pTHX_ I32 size, SV** svp)
                        __attribute__warn_unused_result__
                        __attribute__nonnull__(pTHX_2);
 
-PERL_CALLCONV SV*      Perl_av_pop(pTHX_ AV* ar)
-                       __attribute__warn_unused_result__;
-
+PERL_CALLCONV SV*      Perl_av_pop(pTHX_ AV* ar);
 PERL_CALLCONV void     Perl_av_push(pTHX_ AV* ar, SV* val);
 PERL_CALLCONV void     Perl_av_reify(pTHX_ AV* ar);
 PERL_CALLCONV SV*      Perl_av_shift(pTHX_ AV* ar)
@@ -111,6 +111,7 @@ PERL_CALLCONV SV*   Perl_av_shift(pTHX_ AV* ar)
 PERL_CALLCONV SV**     Perl_av_store(pTHX_ AV* ar, I32 key, SV* val);
 PERL_CALLCONV void     Perl_av_undef(pTHX_ AV* ar);
 PERL_CALLCONV void     Perl_av_unshift(pTHX_ AV* ar, I32 num);
+PERL_CALLCONV SV**     Perl_av_arylen_p(pTHX_ AV* av);
 PERL_CALLCONV OP*      Perl_bind_match(pTHX_ I32 type, OP* left, OP* pat)
                        __attribute__warn_unused_result__
                        __attribute__nonnull__(pTHX_2)
@@ -134,14 +135,26 @@ PERL_CALLCONV bool        Perl_cando(pTHX_ Mode_t mode, Uid_t effective, const Stat_t*
                        __attribute__warn_unused_result__
                        __attribute__nonnull__(pTHX_3);
 
-PERL_CALLCONV U32      Perl_cast_ulong(pTHX_ NV f);
-PERL_CALLCONV I32      Perl_cast_i32(pTHX_ NV f);
-PERL_CALLCONV IV       Perl_cast_iv(pTHX_ NV f);
-PERL_CALLCONV UV       Perl_cast_uv(pTHX_ NV f);
+PERL_CALLCONV U32      Perl_cast_ulong(pTHX_ NV f)
+                       __attribute__warn_unused_result__;
+
+PERL_CALLCONV I32      Perl_cast_i32(pTHX_ NV f)
+                       __attribute__warn_unused_result__;
+
+PERL_CALLCONV IV       Perl_cast_iv(pTHX_ NV f)
+                       __attribute__warn_unused_result__;
+
+PERL_CALLCONV UV       Perl_cast_uv(pTHX_ NV f)
+                       __attribute__warn_unused_result__;
+
 #if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE) && defined(F_FREESP)
-PERL_CALLCONV I32      Perl_my_chsize(pTHX_ int fd, Off_t length);
+PERL_CALLCONV I32      Perl_my_chsize(pTHX_ int fd, Off_t length)
+                       __attribute__warn_unused_result__;
+
 #endif
-PERL_CALLCONV OP*      Perl_convert(pTHX_ I32 optype, I32 flags, OP* o);
+PERL_CALLCONV OP*      Perl_convert(pTHX_ I32 optype, I32 flags, OP* o)
+                       __attribute__warn_unused_result__;
+
 PERL_CALLCONV void     Perl_croak(pTHX_ const char* pat, ...)
                        __attribute__noreturn__
                        __attribute__format__(__printf__,pTHX_1,pTHX_2);
@@ -352,19 +365,33 @@ PERL_CALLCONV char*       Perl_vform(pTHX_ const char* pat, va_list* args);
 PERL_CALLCONV void     Perl_free_tmps(pTHX);
 PERL_CALLCONV OP*      Perl_gen_constant_list(pTHX_ OP* o);
 #if !defined(HAS_GETENV_LEN)
-PERL_CALLCONV char*    Perl_getenv_len(pTHX_ const char* key, unsigned long *len);
+PERL_CALLCONV char*    Perl_getenv_len(pTHX_ const char* key, unsigned long *len)
+                       __attribute__nonnull__(pTHX_1)
+                       __attribute__nonnull__(pTHX_2);
+
 #endif
 PERL_CALLCONV void     Perl_gp_free(pTHX_ GV* gv);
 PERL_CALLCONV GP*      Perl_gp_ref(pTHX_ GP* gp);
-PERL_CALLCONV GV*      Perl_gv_AVadd(pTHX_ GV* gv);
-PERL_CALLCONV GV*      Perl_gv_HVadd(pTHX_ GV* gv);
-PERL_CALLCONV GV*      Perl_gv_IOadd(pTHX_ GV* gv);
-PERL_CALLCONV GV*      Perl_gv_autoload4(pTHX_ HV* stash, const char* name, STRLEN len, I32 method);
+PERL_CALLCONV GV*      Perl_gv_AVadd(pTHX_ GV* gv)
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV GV*      Perl_gv_HVadd(pTHX_ GV* gv)
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV GV*      Perl_gv_IOadd(pTHX_ GV* gv)
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV GV*      Perl_gv_autoload4(pTHX_ HV* stash, const char* name, STRLEN len, I32 method)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_2);
+
 PERL_CALLCONV void     Perl_gv_check(pTHX_ HV* stash);
 PERL_CALLCONV void     Perl_gv_efullname(pTHX_ SV* sv, const GV* gv);
 /* PERL_CALLCONV void  Perl_gv_efullname3(pTHX_ SV* sv, const GV* gv, const char* prefix); */
 PERL_CALLCONV void     Perl_gv_efullname4(pTHX_ SV* sv, const GV* gv, const char* prefix, bool keepmain);
-PERL_CALLCONV GV*      Perl_gv_fetchfile(pTHX_ const char* name);
+PERL_CALLCONV GV*      Perl_gv_fetchfile(pTHX_ const char* name)
+                       __attribute__nonnull__(pTHX_1);
+
 PERL_CALLCONV GV*      Perl_gv_fetchmeth(pTHX_ HV* stash, const char* name, STRLEN len, I32 level);
 PERL_CALLCONV GV*      Perl_gv_fetchmeth_autoload(pTHX_ HV* stash, const char* name, STRLEN len, I32 level);
 PERL_CALLCONV GV*      Perl_gv_fetchmethod(pTHX_ HV* stash, const char* name);
@@ -373,7 +400,10 @@ PERL_CALLCONV GV*  Perl_gv_fetchpv(pTHX_ const char* name, I32 add, I32 sv_type);
 PERL_CALLCONV void     Perl_gv_fullname(pTHX_ SV* sv, const GV* gv);
 /* PERL_CALLCONV void  Perl_gv_fullname3(pTHX_ SV* sv, const GV* gv, const char* prefix); */
 PERL_CALLCONV void     Perl_gv_fullname4(pTHX_ SV* sv, const GV* gv, const char* prefix, bool keepmain);
-PERL_CALLCONV void     Perl_gv_init(pTHX_ GV* gv, HV* stash, const char* name, STRLEN len, int multi);
+PERL_CALLCONV void     Perl_gv_init(pTHX_ GV* gv, HV* stash, const char* name, STRLEN len, int multi)
+                       __attribute__nonnull__(pTHX_1)
+                       __attribute__nonnull__(pTHX_3);
+
 PERL_CALLCONV HV*      Perl_gv_stashpv(pTHX_ const char* name, I32 create);
 PERL_CALLCONV HV*      Perl_gv_stashpvn(pTHX_ const char* name, U32 namelen, I32 create);
 PERL_CALLCONV HV*      Perl_gv_stashsv(pTHX_ SV* sv, I32 create);
@@ -381,8 +411,12 @@ PERL_CALLCONV void Perl_hv_clear(pTHX_ HV* tb);
 PERL_CALLCONV void     Perl_hv_delayfree_ent(pTHX_ HV* hv, HE* entry);
 PERL_CALLCONV SV*      Perl_hv_delete(pTHX_ HV* tb, const char* key, I32 klen, I32 flags);
 PERL_CALLCONV SV*      Perl_hv_delete_ent(pTHX_ HV* tb, SV* key, I32 flags, U32 hash);
-PERL_CALLCONV bool     Perl_hv_exists(pTHX_ HV* tb, const char* key, I32 klen);
-PERL_CALLCONV bool     Perl_hv_exists_ent(pTHX_ HV* tb, SV* key, U32 hash);
+PERL_CALLCONV bool     Perl_hv_exists(pTHX_ HV* tb, const char* key, I32 klen)
+                       __attribute__warn_unused_result__;
+
+PERL_CALLCONV bool     Perl_hv_exists_ent(pTHX_ HV* tb, SV* key, U32 hash)
+                       __attribute__warn_unused_result__;
+
 PERL_CALLCONV SV**     Perl_hv_fetch(pTHX_ HV* tb, const char* key, I32 klen, I32 lval);
 PERL_CALLCONV HE*      Perl_hv_fetch_ent(pTHX_ HV* tb, SV* key, I32 lval, U32 hash);
 PERL_CALLCONV void     Perl_hv_free_ent(pTHX_ HV* hv, HE* entry)
@@ -452,15 +486,22 @@ PERL_CALLCONV void        Perl_init_stacks(pTHX);
 PERL_CALLCONV void     Perl_init_tm(pTHX_ struct tm *ptm);
 PERL_CALLCONV U32      Perl_intro_my(pTHX);
 PERL_CALLCONV char*    Perl_instr(pTHX_ const char* big, const char* little)
+                       __attribute__warn_unused_result__
                        __attribute__pure__
                        __attribute__nonnull__(pTHX_1)
                        __attribute__nonnull__(pTHX_2);
 
-PERL_CALLCONV bool     Perl_io_close(pTHX_ IO* io, bool not_implicit);
-PERL_CALLCONV OP*      Perl_invert(pTHX_ OP* cmd);
-PERL_CALLCONV bool     Perl_is_gv_magical(pTHX_ const char *name, STRLEN len, U32 flags)
+PERL_CALLCONV bool     Perl_io_close(pTHX_ IO* io, bool not_implicit)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV OP*      Perl_invert(pTHX_ OP* cmd)
                        __attribute__warn_unused_result__;
 
+PERL_CALLCONV bool     Perl_is_gv_magical(pTHX_ const char *name, STRLEN len, U32 flags)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
 PERL_CALLCONV I32      Perl_is_lvalue_sub(pTHX)
                        __attribute__warn_unused_result__;
 
@@ -611,55 +652,73 @@ PERL_CALLCONV bool        Perl_is_utf8_string(pTHX_ const U8 *s, STRLEN len)
                        __attribute__nonnull__(pTHX_1);
 
 PERL_CALLCONV bool     Perl_is_utf8_string_loc(pTHX_ const U8 *s, STRLEN len, const U8 **p)
-                       __attribute__nonnull__(pTHX_1)
-                       __attribute__nonnull__(pTHX_3);
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV bool     Perl_is_utf8_string_loclen(pTHX_ const U8 *s, STRLEN len, const U8 **ep, STRLEN *el)
+                       __attribute__nonnull__(pTHX_1);
 
 PERL_CALLCONV bool     Perl_is_utf8_alnum(pTHX_ const U8 *p)
+                       __attribute__warn_unused_result__
                        __attribute__nonnull__(pTHX_1);
 
 PERL_CALLCONV bool     Perl_is_utf8_alnumc(pTHX_ const U8 *p)
+                       __attribute__warn_unused_result__
                        __attribute__nonnull__(pTHX_1);
 
 PERL_CALLCONV bool     Perl_is_utf8_idfirst(pTHX_ const U8 *p)
+                       __attribute__warn_unused_result__
                        __attribute__nonnull__(pTHX_1);
 
 PERL_CALLCONV bool     Perl_is_utf8_idcont(pTHX_ const U8 *p)
+                       __attribute__warn_unused_result__
                        __attribute__nonnull__(pTHX_1);
 
 PERL_CALLCONV bool     Perl_is_utf8_alpha(pTHX_ const U8 *p)
+                       __attribute__warn_unused_result__
                        __attribute__nonnull__(pTHX_1);
 
 PERL_CALLCONV bool     Perl_is_utf8_ascii(pTHX_ const U8 *p)
+                       __attribute__warn_unused_result__
                        __attribute__nonnull__(pTHX_1);
 
 PERL_CALLCONV bool     Perl_is_utf8_space(pTHX_ const U8 *p)
+                       __attribute__warn_unused_result__
                        __attribute__nonnull__(pTHX_1);
 
 PERL_CALLCONV bool     Perl_is_utf8_cntrl(pTHX_ const U8 *p)
+                       __attribute__warn_unused_result__
                        __attribute__nonnull__(pTHX_1);
 
 PERL_CALLCONV bool     Perl_is_utf8_digit(pTHX_ const U8 *p)
+                       __attribute__warn_unused_result__
                        __attribute__nonnull__(pTHX_1);
 
 PERL_CALLCONV bool     Perl_is_utf8_graph(pTHX_ const U8 *p)
+                       __attribute__warn_unused_result__
                        __attribute__nonnull__(pTHX_1);
 
 PERL_CALLCONV bool     Perl_is_utf8_upper(pTHX_ const U8 *p)
+                       __attribute__warn_unused_result__
                        __attribute__nonnull__(pTHX_1);
 
 PERL_CALLCONV bool     Perl_is_utf8_lower(pTHX_ const U8 *p)
+                       __attribute__warn_unused_result__
                        __attribute__nonnull__(pTHX_1);
 
 PERL_CALLCONV bool     Perl_is_utf8_print(pTHX_ const U8 *p)
+                       __attribute__warn_unused_result__
                        __attribute__nonnull__(pTHX_1);
 
 PERL_CALLCONV bool     Perl_is_utf8_punct(pTHX_ const U8 *p)
+                       __attribute__warn_unused_result__
                        __attribute__nonnull__(pTHX_1);
 
 PERL_CALLCONV bool     Perl_is_utf8_xdigit(pTHX_ const U8 *p)
+                       __attribute__warn_unused_result__
                        __attribute__nonnull__(pTHX_1);
 
 PERL_CALLCONV bool     Perl_is_utf8_mark(pTHX_ const U8 *p)
+                       __attribute__warn_unused_result__
                        __attribute__nonnull__(pTHX_1);
 
 PERL_CALLCONV OP*      Perl_jmaybe(pTHX_ OP* arg)
@@ -699,7 +758,9 @@ PERL_CALLCONV UV    Perl_grok_hex(pTHX_ const char* start, STRLEN* len_p, I32* flag
 PERL_CALLCONV int      Perl_grok_number(pTHX_ const char *pv, STRLEN len, UV *valuep)
                        __attribute__nonnull__(pTHX_1);
 
-PERL_CALLCONV bool     Perl_grok_numeric_radix(pTHX_ const char **sp, const char *send);
+PERL_CALLCONV bool     Perl_grok_numeric_radix(pTHX_ const char **sp, const char *send)
+                       __attribute__warn_unused_result__;
+
 PERL_CALLCONV UV       Perl_grok_oct(pTHX_ const char* start, STRLEN* len_p, I32* flags, NV *result);
 PERL_CALLCONV int      Perl_magic_clearenv(pTHX_ SV* sv, MAGIC* mg);
 PERL_CALLCONV int      Perl_magic_clear_all_env(pTHX_ SV* sv, MAGIC* mg);
@@ -709,7 +770,10 @@ PERL_CALLCONV int  Perl_magic_existspack(pTHX_ SV* sv, MAGIC* mg);
 PERL_CALLCONV int      Perl_magic_freeregexp(pTHX_ SV* sv, MAGIC* mg);
 PERL_CALLCONV int      Perl_magic_freeovrld(pTHX_ SV* sv, MAGIC* mg);
 PERL_CALLCONV int      Perl_magic_get(pTHX_ SV* sv, MAGIC* mg);
-PERL_CALLCONV int      Perl_magic_getarylen(pTHX_ SV* sv, MAGIC* mg);
+PERL_CALLCONV int      Perl_magic_getarylen(pTHX_ SV* sv, const MAGIC* mg)
+                       __attribute__nonnull__(pTHX_1)
+                       __attribute__nonnull__(pTHX_2);
+
 PERL_CALLCONV int      Perl_magic_getdefelem(pTHX_ SV* sv, MAGIC* mg);
 PERL_CALLCONV int      Perl_magic_getglob(pTHX_ SV* sv, MAGIC* mg);
 PERL_CALLCONV int      Perl_magic_getnkeys(pTHX_ SV* sv, MAGIC* mg);
@@ -730,11 +794,9 @@ PERL_CALLCONV int  Perl_magic_regdatum_set(pTHX_ SV* sv, MAGIC* mg)
 PERL_CALLCONV int      Perl_magic_set(pTHX_ SV* sv, MAGIC* mg);
 PERL_CALLCONV int      Perl_magic_setamagic(pTHX_ SV* sv, MAGIC* mg);
 PERL_CALLCONV int      Perl_magic_setarylen(pTHX_ SV* sv, MAGIC* mg);
+PERL_CALLCONV int      Perl_magic_freearylen_p(pTHX_ SV* sv, MAGIC* mg);
 PERL_CALLCONV int      Perl_magic_setbm(pTHX_ SV* sv, MAGIC* mg);
 PERL_CALLCONV int      Perl_magic_setdbline(pTHX_ SV* sv, MAGIC* mg);
-#if defined(USE_LOCALE_COLLATE)
-PERL_CALLCONV int      Perl_magic_setcollxfrm(pTHX_ SV* sv, MAGIC* mg);
-#endif
 PERL_CALLCONV int      Perl_magic_setdefelem(pTHX_ SV* sv, MAGIC* mg);
 PERL_CALLCONV int      Perl_magic_setenv(pTHX_ SV* sv, MAGIC* mg);
 PERL_CALLCONV int      Perl_magic_setfm(pTHX_ SV* sv, MAGIC* mg);
@@ -757,6 +819,7 @@ PERL_CALLCONV int   Perl_magic_wipepack(pTHX_ SV* sv, MAGIC* mg);
 PERL_CALLCONV void     Perl_magicname(pTHX_ const char* sym, const char* name, I32 namlen);
 PERL_CALLCONV void     Perl_markstack_grow(pTHX);
 #if defined(USE_LOCALE_COLLATE)
+PERL_CALLCONV int      Perl_magic_setcollxfrm(pTHX_ SV* sv, MAGIC* mg);
 PERL_CALLCONV char*    Perl_mem_collxfrm(pTHX_ const char* s, STRLEN len, STRLEN* xlen);
 #endif
 PERL_CALLCONV SV*      Perl_mess(pTHX_ const char* pat, ...)
@@ -767,6 +830,7 @@ PERL_CALLCONV void  Perl_qerror(pTHX_ SV* err);
 PERL_CALLCONV void     Perl_sortsv(pTHX_ SV ** array, size_t num_elts, SVCOMPARE_t cmp);
 PERL_CALLCONV int      Perl_mg_clear(pTHX_ SV* sv);
 PERL_CALLCONV int      Perl_mg_copy(pTHX_ SV* sv, SV* nsv, const char* key, I32 klen);
+PERL_CALLCONV void     Perl_mg_localize(pTHX_ SV* sv, SV* nsv);
 PERL_CALLCONV MAGIC*   Perl_mg_find(pTHX_ const SV* sv, int type);
 PERL_CALLCONV int      Perl_mg_free(pTHX_ SV* sv);
 PERL_CALLCONV int      Perl_mg_get(pTHX_ SV* sv);
@@ -969,7 +1033,8 @@ PERL_CALLCONV OP*  Perl_newPVOP(pTHX_ I32 type, I32 flags, char* pv)
 
 PERL_CALLCONV SV*      Perl_newRV(pTHX_ SV* pref)
                        __attribute__malloc__
-                       __attribute__warn_unused_result__;
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
 
 PERL_CALLCONV SV*      Perl_newRV_noinc(pTHX_ SV *sv)
                        __attribute__malloc__
@@ -1010,6 +1075,10 @@ PERL_CALLCONV SV*        Perl_newSVpvn(pTHX_ const char* s, STRLEN len)
                        __attribute__malloc__
                        __attribute__warn_unused_result__;
 
+PERL_CALLCONV SV*      Perl_newSVhek(pTHX_ const HEK *hek)
+                       __attribute__malloc__
+                       __attribute__warn_unused_result__;
+
 PERL_CALLCONV SV*      Perl_newSVpvn_share(pTHX_ const char* s, I32 len, U32 hash)
                        __attribute__malloc__
                        __attribute__warn_unused_result__;
@@ -1022,7 +1091,8 @@ PERL_CALLCONV SV* Perl_newSVpvf(pTHX_ const char* pat, ...)
 PERL_CALLCONV SV*      Perl_vnewSVpvf(pTHX_ const char* pat, va_list* args);
 PERL_CALLCONV SV*      Perl_newSVrv(pTHX_ SV* rv, const char* classname)
                        __attribute__malloc__
-                       __attribute__warn_unused_result__;
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
 
 PERL_CALLCONV SV*      Perl_newSVsv(pTHX_ SV* old)
                        __attribute__malloc__
@@ -1044,7 +1114,7 @@ PERL_CALLCONV char*       Perl_scan_vstring(pTHX_ const char *vstr, SV *sv)
                        __attribute__nonnull__(pTHX_1)
                        __attribute__nonnull__(pTHX_2);
 
-PERL_CALLCONV char*    Perl_scan_version(pTHX_ const char *vstr, SV *sv, bool qv)
+PERL_CALLCONV const char*      Perl_scan_version(pTHX_ const char *vstr, SV *sv, bool qv)
                        __attribute__nonnull__(pTHX_1)
                        __attribute__nonnull__(pTHX_2);
 
@@ -1075,9 +1145,11 @@ PERL_CALLCONV PADOFFSET  Perl_pad_findmy(pTHX_ const char* name)
 
 PERL_CALLCONV PADOFFSET        Perl_find_rundefsvoffset(pTHX);
 PERL_CALLCONV OP*      Perl_oopsAV(pTHX_ OP* o)
+                       __attribute__warn_unused_result__
                        __attribute__nonnull__(pTHX_1);
 
 PERL_CALLCONV OP*      Perl_oopsHV(pTHX_ OP* o)
+                       __attribute__warn_unused_result__
                        __attribute__nonnull__(pTHX_1);
 
 PERL_CALLCONV void     Perl_pad_leavemy(pTHX);
@@ -1122,15 +1194,11 @@ PERL_CALLCONV HV*       Perl_get_hv(pTHX_ const char* name, I32 create);
 PERL_CALLCONV CV*      Perl_get_cv(pTHX_ const char* name, I32 create);
 PERL_CALLCONV int      Perl_init_i18nl10n(pTHX_ int printwarn);
 PERL_CALLCONV int      Perl_init_i18nl14n(pTHX_ int printwarn);
-PERL_CALLCONV void     Perl_new_collate(pTHX_ char* newcoll)
-                       __attribute__nonnull__(pTHX_1);
-
-PERL_CALLCONV void     Perl_new_ctype(pTHX_ char* newctype)
-                       __attribute__nonnull__(pTHX_1);
-
-PERL_CALLCONV void     Perl_new_numeric(pTHX_ char* newcoll)
+PERL_CALLCONV void     Perl_new_collate(pTHX_ const char* newcoll);
+PERL_CALLCONV void     Perl_new_ctype(pTHX_ const char* newctype)
                        __attribute__nonnull__(pTHX_1);
 
+PERL_CALLCONV void     Perl_new_numeric(pTHX_ const char* newcoll);
 PERL_CALLCONV void     Perl_set_numeric_local(pTHX);
 PERL_CALLCONV void     Perl_set_numeric_radix(pTHX);
 PERL_CALLCONV void     Perl_set_numeric_standard(pTHX);
@@ -1181,7 +1249,10 @@ PERL_CALLCONV I32        Perl_regexec_flags(pTHX_ regexp* prog, char* stringarg, char*
                        __attribute__nonnull__(pTHX_3)
                        __attribute__nonnull__(pTHX_4);
 
-PERL_CALLCONV regnode* Perl_regnext(pTHX_ regnode* p);
+PERL_CALLCONV regnode* Perl_regnext(pTHX_ regnode* p)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
 PERL_CALLCONV void     Perl_regprop(pTHX_ SV* sv, const regnode* o);
 PERL_CALLCONV void     Perl_repeatcpy(pTHX_ char* to, const char* from, I32 len, I32 count)
                        __attribute__nonnull__(pTHX_1)
@@ -1215,9 +1286,25 @@ PERL_CALLCONV I32        Perl_same_dirent(pTHX_ const char* a, const char* b)
                        __attribute__nonnull__(pTHX_2);
 
 #endif
-PERL_CALLCONV char*    Perl_savepv(pTHX_ const char* pv);
-PERL_CALLCONV char*    Perl_savesharedpv(pTHX_ const char* pv);
-PERL_CALLCONV char*    Perl_savepvn(pTHX_ const char* pv, I32 len);
+PERL_CALLCONV char*    Perl_savepv(pTHX_ const char* pv)
+                       __attribute__malloc__
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV char*    Perl_savepvn(pTHX_ const char* pv, I32 len)
+                       __attribute__malloc__
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV char*    Perl_savesharedpv(pTHX_ const char* pv)
+                       __attribute__malloc__
+                       __attribute__warn_unused_result__;
+
+PERL_CALLCONV char*    Perl_savesvpv(pTHX_ SV* sv)
+                       __attribute__malloc__
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
 PERL_CALLCONV void     Perl_savestack_grow(pTHX);
 PERL_CALLCONV void     Perl_savestack_grow_cnt(pTHX_ I32 need);
 PERL_CALLCONV void     Perl_save_aelem(pTHX_ const AV* av, I32 idx, SV **sptr);
@@ -1311,24 +1398,19 @@ PERL_CALLCONV NV        Perl_sv_2nv(pTHX_ SV* sv)
                        __attribute__nonnull__(pTHX_1);
 
 /* PERL_CALLCONV char* sv_2pv(pTHX_ SV* sv, STRLEN* lp)
-                       __attribute__nonnull__(pTHX_1)
-                       __attribute__nonnull__(pTHX_2); */
+                       __attribute__nonnull__(pTHX_1); */
 
 PERL_CALLCONV char*    Perl_sv_2pv_flags(pTHX_ SV* sv, STRLEN* lp, I32 flags)
-                       __attribute__nonnull__(pTHX_1)
-                       __attribute__nonnull__(pTHX_2);
+                       __attribute__nonnull__(pTHX_1);
 
 PERL_CALLCONV char*    Perl_sv_2pvutf8(pTHX_ SV* sv, STRLEN* lp)
-                       __attribute__nonnull__(pTHX_1)
-                       __attribute__nonnull__(pTHX_2);
+                       __attribute__nonnull__(pTHX_1);
 
 PERL_CALLCONV char*    Perl_sv_2pvbyte(pTHX_ SV* sv, STRLEN* lp)
-                       __attribute__nonnull__(pTHX_1)
-                       __attribute__nonnull__(pTHX_2);
+                       __attribute__nonnull__(pTHX_1);
 
 PERL_CALLCONV char*    Perl_sv_pvn_nomg(pTHX_ SV* sv, STRLEN* lp)
-                       __attribute__nonnull__(pTHX_1)
-                       __attribute__nonnull__(pTHX_2);
+                       __attribute__nonnull__(pTHX_1);
 
 /* PERL_CALLCONV UV    sv_2uv(pTHX_ SV* sv)
                        __attribute__nonnull__(pTHX_1); */
@@ -1404,7 +1486,8 @@ PERL_CALLCONV I32 Perl_sv_cmp_locale(pTHX_ SV* sv1, SV* sv2)
 
 #if defined(USE_LOCALE_COLLATE)
 PERL_CALLCONV char*    Perl_sv_collxfrm(pTHX_ SV* sv, STRLEN* nxp)
-                       __attribute__nonnull__(pTHX_1);
+                       __attribute__nonnull__(pTHX_1)
+                       __attribute__nonnull__(pTHX_2);
 
 #endif
 PERL_CALLCONV OP*      Perl_sv_compile_2op(pTHX_ SV* sv, OP** startp, const char* code, PAD** padp)
@@ -1456,12 +1539,8 @@ PERL_CALLCONV int        Perl_sv_isa(pTHX_ SV* sv, const char* name)
 PERL_CALLCONV int      Perl_sv_isobject(pTHX_ SV* sv)
                        __attribute__nonnull__(pTHX_1);
 
-PERL_CALLCONV STRLEN   Perl_sv_len(pTHX_ SV* sv)
-                       __attribute__nonnull__(pTHX_1);
-
-PERL_CALLCONV STRLEN   Perl_sv_len_utf8(pTHX_ SV* sv)
-                       __attribute__nonnull__(pTHX_1);
-
+PERL_CALLCONV STRLEN   Perl_sv_len(pTHX_ SV* sv);
+PERL_CALLCONV STRLEN   Perl_sv_len_utf8(pTHX_ SV* sv);
 PERL_CALLCONV void     Perl_sv_magic(pTHX_ SV* sv, SV* obj, int how, const char* name, I32 namlen)
                        __attribute__nonnull__(pTHX_1);
 
@@ -1469,15 +1548,20 @@ PERL_CALLCONV MAGIC *   Perl_sv_magicext(pTHX_ SV* sv, SV* obj, int how, const MGV
                        __attribute__nonnull__(pTHX_1);
 
 PERL_CALLCONV SV*      Perl_sv_mortalcopy(pTHX_ SV* oldsv)
-                       __attribute__nonnull__(pTHX_1);
+                       __attribute__malloc__
+                       __attribute__warn_unused_result__;
 
 PERL_CALLCONV SV*      Perl_sv_newmortal(pTHX)
                        __attribute__warn_unused_result__;
 
 PERL_CALLCONV SV*      Perl_sv_newref(pTHX_ SV* sv);
 PERL_CALLCONV char*    Perl_sv_peek(pTHX_ SV* sv);
-PERL_CALLCONV void     Perl_sv_pos_u2b(pTHX_ SV* sv, I32* offsetp, I32* lenp);
-PERL_CALLCONV void     Perl_sv_pos_b2u(pTHX_ SV* sv, I32* offsetp);
+PERL_CALLCONV void     Perl_sv_pos_u2b(pTHX_ SV* sv, I32* offsetp, I32* lenp)
+                       __attribute__nonnull__(pTHX_2);
+
+PERL_CALLCONV void     Perl_sv_pos_b2u(pTHX_ SV* sv, I32* offsetp)
+                       __attribute__nonnull__(pTHX_2);
+
 /* PERL_CALLCONV char* sv_pvn_force(pTHX_ SV* sv, STRLEN* lp); */
 PERL_CALLCONV char*    Perl_sv_pvutf8n_force(pTHX_ SV* sv, STRLEN* lp);
 PERL_CALLCONV char*    Perl_sv_pvbyten_force(pTHX_ SV* sv, STRLEN* lp);
@@ -1492,27 +1576,35 @@ PERL_CALLCONV void      Perl_sv_replace(pTHX_ SV* sv, SV* nsv)
                        __attribute__nonnull__(pTHX_2);
 
 PERL_CALLCONV void     Perl_sv_report_used(pTHX);
-PERL_CALLCONV void     Perl_sv_reset(pTHX_ const char* s, HV* stash);
+PERL_CALLCONV void     Perl_sv_reset(pTHX_ const char* s, HV* stash)
+                       __attribute__nonnull__(pTHX_1);
+
 PERL_CALLCONV void     Perl_sv_setpvf(pTHX_ SV* sv, const char* pat, ...)
                        __attribute__format__(__printf__,pTHX_2,pTHX_3);
 
 PERL_CALLCONV void     Perl_sv_vsetpvf(pTHX_ SV* sv, const char* pat, va_list* args);
 PERL_CALLCONV void     Perl_sv_setiv(pTHX_ SV* sv, IV num);
-PERL_CALLCONV void     Perl_sv_setpviv(pTHX_ SV* sv, IV num);
+PERL_CALLCONV void     Perl_sv_setpviv(pTHX_ SV* sv, IV num)
+                       __attribute__nonnull__(pTHX_1);
+
 PERL_CALLCONV void     Perl_sv_setuv(pTHX_ SV* sv, UV num);
 PERL_CALLCONV void     Perl_sv_setnv(pTHX_ SV* sv, NV num);
 PERL_CALLCONV SV*      Perl_sv_setref_iv(pTHX_ SV* rv, const char* classname, IV iv);
 PERL_CALLCONV SV*      Perl_sv_setref_uv(pTHX_ SV* rv, const char* classname, UV uv);
 PERL_CALLCONV SV*      Perl_sv_setref_nv(pTHX_ SV* rv, const char* classname, NV nv);
 PERL_CALLCONV SV*      Perl_sv_setref_pv(pTHX_ SV* rv, const char* classname, void* pv);
-PERL_CALLCONV SV*      Perl_sv_setref_pvn(pTHX_ SV* rv, const char* classname, char* pv, STRLEN n);
+PERL_CALLCONV SV*      Perl_sv_setref_pvn(pTHX_ SV* rv, const char* classname, const char* pv, STRLEN n)
+                       __attribute__nonnull__(pTHX_3);
+
 PERL_CALLCONV void     Perl_sv_setpv(pTHX_ SV* sv, const char* ptr);
 PERL_CALLCONV void     Perl_sv_setpvn(pTHX_ SV* sv, const char* ptr, STRLEN len)
                        __attribute__nonnull__(pTHX_1);
 
 /* PERL_CALLCONV void  sv_setsv(pTHX_ SV* dsv, SV* ssv); */
 PERL_CALLCONV void     Perl_sv_taint(pTHX_ SV* sv);
-PERL_CALLCONV bool     Perl_sv_tainted(pTHX_ SV* sv);
+PERL_CALLCONV bool     Perl_sv_tainted(pTHX_ SV* sv)
+                       __attribute__warn_unused_result__;
+
 PERL_CALLCONV int      Perl_sv_unmagic(pTHX_ SV* sv, int type)
                        __attribute__nonnull__(pTHX_1);
 
@@ -1525,7 +1617,7 @@ PERL_CALLCONV void        Perl_sv_unref_flags(pTHX_ SV* sv, U32 flags)
 PERL_CALLCONV void     Perl_sv_untaint(pTHX_ SV* sv)
                        __attribute__nonnull__(pTHX_1);
 
-PERL_CALLCONV bool     Perl_sv_upgrade(pTHX_ SV* sv, U32 mt)
+PERL_CALLCONV void     Perl_sv_upgrade(pTHX_ SV* sv, U32 mt)
                        __attribute__nonnull__(pTHX_1);
 
 PERL_CALLCONV void     Perl_sv_usepvn(pTHX_ SV* sv, char* ptr, STRLEN len)
@@ -1543,7 +1635,9 @@ PERL_CALLCONV NV  Perl_str_to_version(pTHX_ SV *sv);
 PERL_CALLCONV SV*      Perl_swash_init(pTHX_ const char* pkg, const char* name, SV* listsv, I32 minbits, I32 none);
 PERL_CALLCONV UV       Perl_swash_fetch(pTHX_ SV *sv, const U8 *ptr, bool do_utf8);
 PERL_CALLCONV void     Perl_taint_env(pTHX);
-PERL_CALLCONV void     Perl_taint_proper(pTHX_ const char* f, const char* s);
+PERL_CALLCONV void     Perl_taint_proper(pTHX_ const char* f, const char* s)
+                       __attribute__nonnull__(pTHX_2);
+
 PERL_CALLCONV UV       Perl_to_utf8_case(pTHX_ const U8 *p, U8* ustrp, STRLEN *lenp, SV **swash, const char *normal, const char *special)
                        __attribute__nonnull__(pTHX_1)
                        __attribute__nonnull__(pTHX_2);
@@ -1676,7 +1770,9 @@ PERL_CALLCONV void        Perl_sv_setpvf_mg(pTHX_ SV *sv, const char* pat, ...)
 
 PERL_CALLCONV void     Perl_sv_vsetpvf_mg(pTHX_ SV* sv, const char* pat, va_list* args);
 PERL_CALLCONV void     Perl_sv_setiv_mg(pTHX_ SV *sv, IV i);
-PERL_CALLCONV void     Perl_sv_setpviv_mg(pTHX_ SV *sv, IV iv);
+PERL_CALLCONV void     Perl_sv_setpviv_mg(pTHX_ SV *sv, IV iv)
+                       __attribute__nonnull__(pTHX_1);
+
 PERL_CALLCONV void     Perl_sv_setuv_mg(pTHX_ SV *sv, UV u);
 PERL_CALLCONV void     Perl_sv_setnv_mg(pTHX_ SV *sv, NV num);
 PERL_CALLCONV void     Perl_sv_setpv_mg(pTHX_ SV *sv, const char *ptr);
@@ -1686,16 +1782,33 @@ PERL_CALLCONV void      Perl_sv_usepvn_mg(pTHX_ SV *sv, char *ptr, STRLEN len);
 PERL_CALLCONV MGVTBL*  Perl_get_vtbl(pTHX_ int vtbl_id);
 PERL_CALLCONV char*    Perl_pv_display(pTHX_ SV *dsv, const char *pv, STRLEN cur, STRLEN len, STRLEN pvlim);
 PERL_CALLCONV void     Perl_dump_indent(pTHX_ I32 level, PerlIO *file, const char* pat, ...)
-                       __attribute__format__(__printf__,pTHX_3,pTHX_4);
-
-PERL_CALLCONV void     Perl_dump_vindent(pTHX_ I32 level, PerlIO *file, const char* pat, va_list *args);
-PERL_CALLCONV void     Perl_do_gv_dump(pTHX_ I32 level, PerlIO *file, const char *name, GV *sv);
-PERL_CALLCONV void     Perl_do_gvgv_dump(pTHX_ I32 level, PerlIO *file, const char *name, GV *sv);
-PERL_CALLCONV void     Perl_do_hv_dump(pTHX_ I32 level, PerlIO *file, const char *name, HV *sv);
-PERL_CALLCONV void     Perl_do_magic_dump(pTHX_ I32 level, PerlIO *file, const MAGIC *mg, I32 nest, I32 maxnest, bool dumpops, STRLEN pvlim);
-PERL_CALLCONV void     Perl_do_op_dump(pTHX_ I32 level, PerlIO *file, const OP *o);
-PERL_CALLCONV void     Perl_do_pmop_dump(pTHX_ I32 level, PerlIO *file, const PMOP *pm);
-PERL_CALLCONV void     Perl_do_sv_dump(pTHX_ I32 level, PerlIO *file, SV *sv, I32 nest, I32 maxnest, bool dumpops, STRLEN pvlim);
+                       __attribute__format__(__printf__,pTHX_3,pTHX_4)
+                       __attribute__nonnull__(pTHX_2);
+
+PERL_CALLCONV void     Perl_dump_vindent(pTHX_ I32 level, PerlIO *file, const char* pat, va_list *args)
+                       __attribute__nonnull__(pTHX_2);
+
+PERL_CALLCONV void     Perl_do_gv_dump(pTHX_ I32 level, PerlIO *file, const char *name, GV *sv)
+                       __attribute__nonnull__(pTHX_2);
+
+PERL_CALLCONV void     Perl_do_gvgv_dump(pTHX_ I32 level, PerlIO *file, const char *name, GV *sv)
+                       __attribute__nonnull__(pTHX_2);
+
+PERL_CALLCONV void     Perl_do_hv_dump(pTHX_ I32 level, PerlIO *file, const char *name, HV *sv)
+                       __attribute__nonnull__(pTHX_2);
+
+PERL_CALLCONV void     Perl_do_magic_dump(pTHX_ I32 level, PerlIO *file, const MAGIC *mg, I32 nest, I32 maxnest, bool dumpops, STRLEN pvlim)
+                       __attribute__nonnull__(pTHX_2);
+
+PERL_CALLCONV void     Perl_do_op_dump(pTHX_ I32 level, PerlIO *file, const OP *o)
+                       __attribute__nonnull__(pTHX_2);
+
+PERL_CALLCONV void     Perl_do_pmop_dump(pTHX_ I32 level, PerlIO *file, const PMOP *pm)
+                       __attribute__nonnull__(pTHX_2);
+
+PERL_CALLCONV void     Perl_do_sv_dump(pTHX_ I32 level, PerlIO *file, SV *sv, I32 nest, I32 maxnest, bool dumpops, STRLEN pvlim)
+                       __attribute__nonnull__(pTHX_2);
+
 PERL_CALLCONV void     Perl_magic_dump(pTHX_ const MAGIC *mg);
 PERL_CALLCONV void     Perl_reginitcolors(pTHX);
 PERL_CALLCONV char*    Perl_sv_2pv_nolen(pTHX_ SV* sv);
@@ -1723,34 +1836,87 @@ PERL_CALLCONV OP *      Perl_my_attrs(pTHX_ OP *o, OP *attrs)
 
 PERL_CALLCONV void     Perl_boot_core_xsutils(pTHX);
 #if defined(USE_ITHREADS)
-PERL_CALLCONV PERL_CONTEXT*    Perl_cx_dup(pTHX_ PERL_CONTEXT* cx, I32 ix, I32 max, CLONE_PARAMS* param);
-PERL_CALLCONV PERL_SI* Perl_si_dup(pTHX_ PERL_SI* si, CLONE_PARAMS* param);
-PERL_CALLCONV ANY*     Perl_ss_dup(pTHX_ PerlInterpreter* proto_perl, CLONE_PARAMS* param);
-PERL_CALLCONV void*    Perl_any_dup(pTHX_ void* v, PerlInterpreter* proto_perl);
-PERL_CALLCONV HE*      Perl_he_dup(pTHX_ HE* e, bool shared, CLONE_PARAMS* param);
-PERL_CALLCONV REGEXP*  Perl_re_dup(pTHX_ REGEXP* r, CLONE_PARAMS* param);
-PERL_CALLCONV PerlIO*  Perl_fp_dup(pTHX_ PerlIO* fp, char type, CLONE_PARAMS* param);
-PERL_CALLCONV DIR*     Perl_dirp_dup(pTHX_ DIR* dp);
-PERL_CALLCONV GP*      Perl_gp_dup(pTHX_ GP* gp, CLONE_PARAMS* param);
-PERL_CALLCONV MAGIC*   Perl_mg_dup(pTHX_ MAGIC* mg, CLONE_PARAMS* param);
-PERL_CALLCONV SV*      Perl_sv_dup(pTHX_ SV* sstr, CLONE_PARAMS* param);
-PERL_CALLCONV void     Perl_rvpv_dup(pTHX_ SV* dstr, SV *sstr, CLONE_PARAMS* param);
-#if defined(HAVE_INTERP_INTERN)
-PERL_CALLCONV void     Perl_sys_intern_dup(pTHX_ struct interp_intern* src, struct interp_intern* dst);
-#endif
-PERL_CALLCONV PTR_TBL_t*       Perl_ptr_table_new(pTHX);
-PERL_CALLCONV void*    Perl_ptr_table_fetch(pTHX_ PTR_TBL_t *tbl, void *sv)
-                       __attribute__nonnull__(pTHX_1)
+PERL_CALLCONV PERL_CONTEXT*    Perl_cx_dup(pTHX_ PERL_CONTEXT* cx, I32 ix, I32 max, CLONE_PARAMS* param)
+                       __attribute__malloc__
+                       __attribute__warn_unused_result__;
+
+PERL_CALLCONV PERL_SI* Perl_si_dup(pTHX_ PERL_SI* si, CLONE_PARAMS* param)
+                       __attribute__malloc__
+                       __attribute__warn_unused_result__;
+
+PERL_CALLCONV ANY*     Perl_ss_dup(pTHX_ PerlInterpreter* proto_perl, CLONE_PARAMS* param)
+                       __attribute__malloc__
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV void*    Perl_any_dup(pTHX_ void* v, const PerlInterpreter* proto_perl)
+                       __attribute__malloc__
+                       __attribute__warn_unused_result__
                        __attribute__nonnull__(pTHX_2);
 
-PERL_CALLCONV void     Perl_ptr_table_store(pTHX_ PTR_TBL_t *tbl, void *oldsv, void *newsv)
+PERL_CALLCONV HE*      Perl_he_dup(pTHX_ HE* e, bool shared, CLONE_PARAMS* param)
+                       __attribute__malloc__
+                       __attribute__warn_unused_result__;
+
+PERL_CALLCONV HEK*     Perl_hek_dup(pTHX_ HEK* e, CLONE_PARAMS* param)
+                       __attribute__malloc__
+                       __attribute__warn_unused_result__;
+
+PERL_CALLCONV REGEXP*  Perl_re_dup(pTHX_ const REGEXP* r, CLONE_PARAMS* param)
+                       __attribute__malloc__
+                       __attribute__warn_unused_result__;
+
+PERL_CALLCONV PerlIO*  Perl_fp_dup(pTHX_ PerlIO* fp, char type, CLONE_PARAMS* param)
+                       __attribute__malloc__
+                       __attribute__warn_unused_result__;
+
+PERL_CALLCONV DIR*     Perl_dirp_dup(pTHX_ DIR* dp)
+                       __attribute__malloc__
+                       __attribute__warn_unused_result__;
+
+PERL_CALLCONV GP*      Perl_gp_dup(pTHX_ GP* gp, CLONE_PARAMS* param)
+                       __attribute__malloc__
+                       __attribute__warn_unused_result__;
+
+PERL_CALLCONV MAGIC*   Perl_mg_dup(pTHX_ MAGIC* mg, CLONE_PARAMS* param)
+                       __attribute__malloc__
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV SV*      Perl_sv_dup(pTHX_ SV* sstr, CLONE_PARAMS* param)
+                       __attribute__malloc__
+                       __attribute__warn_unused_result__
                        __attribute__nonnull__(pTHX_1);
 
+PERL_CALLCONV void     Perl_rvpv_dup(pTHX_ SV* dstr, SV *sstr, CLONE_PARAMS* param)
+                       __attribute__nonnull__(pTHX_1)
+                       __attribute__nonnull__(pTHX_2);
+
+PERL_CALLCONV PTR_TBL_t*       Perl_ptr_table_new(pTHX)
+                       __attribute__malloc__
+                       __attribute__warn_unused_result__;
+
+PERL_CALLCONV void*    Perl_ptr_table_fetch(pTHX_ PTR_TBL_t *tbl, const void *sv)
+                       __attribute__malloc__
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1)
+                       __attribute__nonnull__(pTHX_2);
+
+PERL_CALLCONV void     Perl_ptr_table_store(pTHX_ PTR_TBL_t *tbl, const void *oldsv, void *newsv)
+                       __attribute__nonnull__(pTHX_1)
+                       __attribute__nonnull__(pTHX_3);
+
 PERL_CALLCONV void     Perl_ptr_table_split(pTHX_ PTR_TBL_t *tbl)
                        __attribute__nonnull__(pTHX_1);
 
 PERL_CALLCONV void     Perl_ptr_table_clear(pTHX_ PTR_TBL_t *tbl);
 PERL_CALLCONV void     Perl_ptr_table_free(pTHX_ PTR_TBL_t *tbl);
+#  if defined(HAVE_INTERP_INTERN)
+PERL_CALLCONV void     Perl_sys_intern_dup(pTHX_ struct interp_intern* src, struct interp_intern* dst)
+                       __attribute__nonnull__(pTHX_1)
+                       __attribute__nonnull__(pTHX_2);
+
+#  endif
 #endif
 #if defined(HAVE_INTERP_INTERN)
 PERL_CALLCONV void     Perl_sys_intern_clear(pTHX);
@@ -1758,13 +1924,15 @@ PERL_CALLCONV void      Perl_sys_intern_init(pTHX);
 #endif
 
 PERL_CALLCONV char *   Perl_custom_op_name(pTHX_ const OP* op)
+                       __attribute__warn_unused_result__
                        __attribute__nonnull__(pTHX_1);
 
 PERL_CALLCONV char *   Perl_custom_op_desc(pTHX_ const OP* op)
+                       __attribute__warn_unused_result__
                        __attribute__nonnull__(pTHX_1);
 
 
-#if defined(PERL_COPY_ON_WRITE)
+#if defined(PERL_OLD_COPY_ON_WRITE)
 PERL_CALLCONV int      Perl_sv_release_IVX(pTHX_ SV *sv);
 #endif
 
@@ -1777,75 +1945,325 @@ END_EXTERN_C
 
 #if defined(PERL_IN_DOOP_C) || defined(PERL_DECL_PROT)
 STATIC I32     S_do_trans_simple(pTHX_ SV *sv)
+                       __attribute__warn_unused_result__
                        __attribute__nonnull__(pTHX_1);
 
 STATIC I32     S_do_trans_count(pTHX_ SV *sv)
+                       __attribute__warn_unused_result__
                        __attribute__nonnull__(pTHX_1);
 
 STATIC I32     S_do_trans_complex(pTHX_ SV *sv)
+                       __attribute__warn_unused_result__
                        __attribute__nonnull__(pTHX_1);
 
 STATIC I32     S_do_trans_simple_utf8(pTHX_ SV *sv)
+                       __attribute__warn_unused_result__
                        __attribute__nonnull__(pTHX_1);
 
 STATIC I32     S_do_trans_count_utf8(pTHX_ SV *sv)
+                       __attribute__warn_unused_result__
                        __attribute__nonnull__(pTHX_1);
 
 STATIC I32     S_do_trans_complex_utf8(pTHX_ SV *sv)
+                       __attribute__warn_unused_result__
                        __attribute__nonnull__(pTHX_1);
 
 #endif
 
 #if defined(PERL_IN_GV_C) || defined(PERL_DECL_PROT)
-STATIC void    S_gv_init_sv(pTHX_ GV *gv, I32 sv_type);
+STATIC void    S_gv_init_sv(pTHX_ GV *gv, I32 sv_type)
+                       __attribute__nonnull__(pTHX_1);
+
 STATIC void    S_require_errno(pTHX_ GV *gv)
                        __attribute__nonnull__(pTHX_1);
 
 #endif
 
 #if defined(PERL_IN_HV_C) || defined(PERL_DECL_PROT)
-STATIC void    S_hsplit(pTHX_ HV *hv);
+STATIC void    S_hsplit(pTHX_ HV *hv)
+                       __attribute__nonnull__(pTHX_1);
+
 STATIC void    S_hfreeentries(pTHX_ HV *hv);
-STATIC HE*     S_new_he(pTHX);
-STATIC void    S_del_he(pTHX_ HE *p);
-STATIC HEK*    S_save_hek_flags(pTHX_ const char *str, I32 len, U32 hash, int flags);
-STATIC void    S_hv_magic_check(pTHX_ HV *hv, bool *needs_copy, bool *needs_store);
-STATIC void    S_unshare_hek_or_pvn(pTHX_ HEK* hek, const char* sv, I32 len, U32 hash);
-STATIC HEK*    S_share_hek_flags(pTHX_ const char* sv, I32 len, U32 hash, int flags);
-STATIC void    S_hv_notallowed(pTHX_ int flags, const char *key, I32 klen, const char *msg)
-                       __attribute__noreturn__;
+STATIC HE*     S_new_he(pTHX)
+                       __attribute__malloc__
+                       __attribute__warn_unused_result__;
 
-#endif
+STATIC void    S_del_he(pTHX_ HE *p)
+                       __attribute__nonnull__(pTHX_1);
 
-#if defined(PERL_IN_MG_C) || defined(PERL_DECL_PROT)
-STATIC void    S_save_magic(pTHX_ I32 mgs_ix, SV *sv);
-STATIC int     S_magic_methpack(pTHX_ SV *sv, const MAGIC *mg, const char *meth);
-STATIC int     S_magic_methcall(pTHX_ SV *sv, const MAGIC *mg, const char *meth, I32 f, int n, SV *val);
-#endif
+STATIC HEK*    S_save_hek_flags(pTHX_ const char *str, I32 len, U32 hash, int flags)
+                       __attribute__malloc__
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
 
-#if defined(PERL_IN_OP_C) || defined(PERL_DECL_PROT)
-STATIC I32     S_list_assignment(pTHX_ const OP *o);
-STATIC void    S_bad_type(pTHX_ I32 n, const char *t, const char *name, const OP *kid);
-STATIC void    S_cop_free(pTHX_ COP *cop);
-STATIC OP*     S_modkids(pTHX_ OP *o, I32 type);
-STATIC void    S_no_bareword_allowed(pTHX_ const OP *o);
-STATIC OP*     S_no_fh_allowed(pTHX_ OP *o);
-STATIC OP*     S_scalarboolean(pTHX_ OP *o);
-STATIC OP*     S_too_few_arguments(pTHX_ OP *o, const char* name);
-STATIC OP*     S_too_many_arguments(pTHX_ OP *o, const char* name);
-STATIC OP*     S_newDEFSVOP(pTHX);
-STATIC OP*     S_new_logop(pTHX_ I32 type, I32 flags, OP **firstp, OP **otherp);
-STATIC void    S_simplify_sort(pTHX_ OP *o);
-STATIC bool    S_is_handle_constructor(pTHX_ const OP *o, I32 argnum);
-STATIC char*   S_gv_ename(pTHX_ GV *gv);
-STATIC bool    S_scalar_mod_type(pTHX_ const OP *o, I32 type);
-STATIC OP *    S_my_kid(pTHX_ OP *o, OP *attrs, OP **imopsp);
-STATIC OP *    S_dup_attrlist(pTHX_ OP *o);
+STATIC void    S_hv_magic_check(pTHX_ HV *hv, bool *needs_copy, bool *needs_store)
+                       __attribute__nonnull__(pTHX_1)
+                       __attribute__nonnull__(pTHX_2)
+                       __attribute__nonnull__(pTHX_3);
+
+STATIC void    S_unshare_hek_or_pvn(pTHX_ const HEK* hek, const char* str, I32 len, U32 hash);
+STATIC HEK*    S_share_hek_flags(pTHX_ const char* sv, I32 len, U32 hash, int flags)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+STATIC void    S_hv_notallowed(pTHX_ int flags, const char *key, I32 klen, const char *msg)
+                       __attribute__noreturn__
+                       __attribute__nonnull__(pTHX_2)
+                       __attribute__nonnull__(pTHX_4);
+
+STATIC struct xpvhv_aux*       S_hv_auxinit(pTHX_ HV *hv)
+                       __attribute__nonnull__(pTHX_1);
+
+STATIC SV*     S_hv_delete_common(pTHX_ HV* tb, SV* key_sv, const char* key, STRLEN klen, int k_flags, I32 d_flags, U32 hash);
+STATIC HE*     S_hv_fetch_common(pTHX_ HV* tb, SV* key_sv, const char* key, STRLEN klen, int flags, int action, SV* val, U32 hash);
+#endif
+
+#if defined(PERL_IN_MG_C) || defined(PERL_DECL_PROT)
+STATIC void    S_save_magic(pTHX_ I32 mgs_ix, SV *sv)
+                       __attribute__nonnull__(pTHX_2);
+
+STATIC int     S_magic_methpack(pTHX_ SV *sv, const MAGIC *mg, const char *meth)
+                       __attribute__nonnull__(pTHX_1)
+                       __attribute__nonnull__(pTHX_2)
+                       __attribute__nonnull__(pTHX_3);
+
+STATIC int     S_magic_methcall(pTHX_ SV *sv, const MAGIC *mg, const char *meth, I32 f, int n, SV *val)
+                       __attribute__nonnull__(pTHX_1)
+                       __attribute__nonnull__(pTHX_2)
+                       __attribute__nonnull__(pTHX_3);
+
+STATIC void    S_restore_magic(pTHX_ const void *p)
+                       __attribute__nonnull__(pTHX_1);
+
+STATIC void    S_unwind_handler_stack(pTHX_ const void *p)
+                       __attribute__nonnull__(pTHX_1);
+
+
+#endif
+
+#if defined(PERL_IN_OP_C) || defined(PERL_DECL_PROT)
+PERL_CALLCONV OP*      Perl_ck_anoncode(pTHX_ OP *o)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV OP*      Perl_ck_bitop(pTHX_ OP *o)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV OP*      Perl_ck_concat(pTHX_ OP *o)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV OP*      Perl_ck_defined(pTHX_ OP *o)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV OP*      Perl_ck_delete(pTHX_ OP *o)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV OP*      Perl_ck_die(pTHX_ OP *o)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV OP*      Perl_ck_eof(pTHX_ OP *o)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV OP*      Perl_ck_eval(pTHX_ OP *o)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV OP*      Perl_ck_exec(pTHX_ OP *o)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV OP*      Perl_ck_exists(pTHX_ OP *o)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV OP*      Perl_ck_exit(pTHX_ OP *o)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV OP*      Perl_ck_ftst(pTHX_ OP *o)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV OP*      Perl_ck_fun(pTHX_ OP *o)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV OP*      Perl_ck_glob(pTHX_ OP *o)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV OP*      Perl_ck_grep(pTHX_ OP *o)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV OP*      Perl_ck_index(pTHX_ OP *o)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV OP*      Perl_ck_join(pTHX_ OP *o)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV OP*      Perl_ck_lengthconst(pTHX_ OP *o)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV OP*      Perl_ck_lfun(pTHX_ OP *o)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV OP*      Perl_ck_listiob(pTHX_ OP *o)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV OP*      Perl_ck_match(pTHX_ OP *o)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV OP*      Perl_ck_method(pTHX_ OP *o)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV OP*      Perl_ck_null(pTHX_ OP *o)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV OP*      Perl_ck_open(pTHX_ OP *o)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV OP*      Perl_ck_repeat(pTHX_ OP *o)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV OP*      Perl_ck_require(pTHX_ OP *o)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV OP*      Perl_ck_retarget(pTHX_ OP *o)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV OP*      Perl_ck_return(pTHX_ OP *o)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV OP*      Perl_ck_rfun(pTHX_ OP *o)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV OP*      Perl_ck_rvconst(pTHX_ OP *o)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV OP*      Perl_ck_sassign(pTHX_ OP *o)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV OP*      Perl_ck_select(pTHX_ OP *o)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV OP*      Perl_ck_shift(pTHX_ OP *o)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV OP*      Perl_ck_sort(pTHX_ OP *o)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV OP*      Perl_ck_spair(pTHX_ OP *o)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV OP*      Perl_ck_split(pTHX_ OP *o)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV OP*      Perl_ck_subr(pTHX_ OP *o)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV OP*      Perl_ck_substr(pTHX_ OP *o)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV OP*      Perl_ck_svconst(pTHX_ OP *o)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV OP*      Perl_ck_trunc(pTHX_ OP *o)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV OP*      Perl_ck_unpack(pTHX_ OP *o)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+STATIC bool    S_is_handle_constructor(pTHX_ const OP *o, I32 numargs)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+STATIC I32     S_is_list_assignment(pTHX_ const OP *o)
+                       __attribute__warn_unused_result__;
+
+STATIC void    S_cop_free(pTHX_ COP *cop)
+                       __attribute__nonnull__(pTHX_1);
+
+STATIC OP*     S_modkids(pTHX_ OP *o, I32 type);
+STATIC OP*     S_scalarboolean(pTHX_ OP *o)
+                       __attribute__nonnull__(pTHX_1);
+
+STATIC OP*     S_newDEFSVOP(pTHX)
+                       __attribute__warn_unused_result__;
+
+STATIC OP*     S_new_logop(pTHX_ I32 type, I32 flags, OP **firstp, OP **otherp)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_3)
+                       __attribute__nonnull__(pTHX_4);
+
+STATIC void    S_simplify_sort(pTHX_ OP *o)
+                       __attribute__nonnull__(pTHX_1);
+
+STATIC const char*     S_gv_ename(pTHX_ GV *gv);
+STATIC bool    S_scalar_mod_type(pTHX_ const OP *o, I32 type);
+STATIC OP *    S_my_kid(pTHX_ OP *o, OP *attrs, OP **imopsp);
+STATIC OP *    S_dup_attrlist(pTHX_ OP *o);
 STATIC void    S_apply_attrs(pTHX_ HV *stash, SV *target, OP *attrs, bool for_my);
 STATIC void    S_apply_attrs_my(pTHX_ HV *stash, OP *target, OP *attrs, OP **imopsp);
+STATIC void    S_bad_type(pTHX_ I32 n, const char *t, const char *name, const OP *kid)
+                       __attribute__nonnull__(pTHX_2)
+                       __attribute__nonnull__(pTHX_3)
+                       __attribute__nonnull__(pTHX_4);
+
+STATIC void    S_no_bareword_allowed(pTHX_ const OP *o)
+                       __attribute__nonnull__(pTHX_1);
+
+STATIC OP*     S_no_fh_allowed(pTHX_ OP *o)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+STATIC OP*     S_too_few_arguments(pTHX_ OP *o, const char* name)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1)
+                       __attribute__nonnull__(pTHX_2);
+
+STATIC OP*     S_too_many_arguments(pTHX_ OP *o, const char* name)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1)
+                       __attribute__nonnull__(pTHX_2);
+
 #endif
 #if defined(PL_OP_SLAB_ALLOC)
-PERL_CALLCONV void*    Perl_Slab_Alloc(pTHX_ int m, size_t sz);
+PERL_CALLCONV void*    Perl_Slab_Alloc(pTHX_ int m, size_t sz)
+                       __attribute__warn_unused_result__;
+
 PERL_CALLCONV void     Perl_Slab_Free(pTHX_ void *op);
 #endif
 
@@ -1879,7 +2297,9 @@ STATIC void*      S_call_list_body(pTHX_ CV *cv);
 #endif
 
 #if defined(PERL_IN_PP_C) || defined(PERL_DECL_PROT)
-STATIC SV*     S_refto(pTHX_ SV* sv);
+STATIC SV*     S_refto(pTHX_ SV* sv)
+                       __attribute__warn_unused_result__;
+
 #endif
 
 #if defined(PERL_IN_PP_PACK_C) || defined(PERL_DECL_PROT)
@@ -1895,6 +2315,7 @@ STATIC bool       S_next_symbol(pTHX_ struct tempsym* symptr)
                        __attribute__nonnull__(pTHX_1);
 
 STATIC SV*     S_is_an_int(pTHX_ const char *s, STRLEN l)
+                       __attribute__warn_unused_result__
                        __attribute__nonnull__(pTHX_1);
 
 STATIC int     S_div128(pTHX_ SV *pnum, bool *done)
@@ -1912,69 +2333,169 @@ STATIC const char *    S_get_num(pTHX_ const char *ppat, I32 *lenptr)
 #endif
 
 #if defined(PERL_IN_PP_CTL_C) || defined(PERL_DECL_PROT)
-STATIC OP*     S_docatch(pTHX_ OP *o);
-STATIC void*   S_docatch_body(pTHX);
-STATIC OP*     S_dofindlabel(pTHX_ OP *o, const char *label, OP **opstack, OP **oplimit);
-STATIC OP*     S_doparseform(pTHX_ SV *sv);
-STATIC bool    S_num_overflow(NV value, I32 fldsize, I32 frcsize);
-STATIC I32     S_dopoptoeval(pTHX_ I32 startingblock);
+STATIC OP*     S_docatch(pTHX_ OP *o)
+                       __attribute__warn_unused_result__;
+
+STATIC void    S_docatch_body(pTHX);
+STATIC OP*     S_dofindlabel(pTHX_ OP *o, const char *label, OP **opstack, OP **oplimit)
+                       __attribute__warn_unused_result__;
+
+STATIC OP*     S_doparseform(pTHX_ SV *sv)
+                       __attribute__warn_unused_result__;
+
+STATIC bool    S_num_overflow(NV value, I32 fldsize, I32 frcsize)
+                       __attribute__warn_unused_result__;
+
+STATIC I32     S_dopoptoeval(pTHX_ I32 startingblock)
+                       __attribute__warn_unused_result__;
+
 STATIC I32     S_dopoptolabel(pTHX_ const char *label)
+                       __attribute__warn_unused_result__
                        __attribute__nonnull__(pTHX_1);
 
-STATIC I32     S_dopoptoloop(pTHX_ I32 startingblock);
-STATIC I32     S_dopoptosub(pTHX_ I32 startingblock);
-STATIC I32     S_dopoptosub_at(pTHX_ PERL_CONTEXT* cxstk, I32 startingblock);
+STATIC I32     S_dopoptoloop(pTHX_ I32 startingblock)
+                       __attribute__warn_unused_result__;
+
+STATIC I32     S_dopoptosub(pTHX_ I32 startingblock)
+                       __attribute__warn_unused_result__;
+
+STATIC I32     S_dopoptosub_at(pTHX_ const PERL_CONTEXT* cxstk, I32 startingblock)
+                       __attribute__warn_unused_result__;
+
 STATIC void    S_save_lines(pTHX_ AV *array, SV *sv);
-STATIC OP*     S_doeval(pTHX_ int gimme, OP** startop, CV* outside, U32 seq);
-STATIC PerlIO *        S_doopen_pm(pTHX_ const char *name, const char *mode);
+STATIC OP*     S_doeval(pTHX_ int gimme, OP** startop, CV* outside, U32 seq)
+                       __attribute__warn_unused_result__;
+
+STATIC PerlIO *        S_doopen_pm(pTHX_ const char *name, const char *mode)
+                       __attribute__warn_unused_result__;
+
 STATIC bool    S_path_is_absolute(pTHX_ const char *name)
+                       __attribute__warn_unused_result__
                        __attribute__nonnull__(pTHX_1);
 
 #endif
 
 #if defined(PERL_IN_PP_HOT_C) || defined(PERL_DECL_PROT)
-STATIC void    S_do_oddball(pTHX_ HV *hash, SV **relem, SV **firstrelem);
-STATIC CV*     S_get_db_sub(pTHX_ SV **svp, CV *cv);
-STATIC SV*     S_method_common(pTHX_ SV* meth, U32* hashp);
+STATIC void    S_do_oddball(pTHX_ HV *hash, SV **relem, SV **firstrelem)
+                       __attribute__nonnull__(pTHX_1)
+                       __attribute__nonnull__(pTHX_2)
+                       __attribute__nonnull__(pTHX_3);
+
+STATIC CV*     S_get_db_sub(pTHX_ SV **svp, CV *cv)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1)
+                       __attribute__nonnull__(pTHX_2);
+
+STATIC SV*     S_method_common(pTHX_ SV* meth, U32* hashp)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
 #endif
 
 #if defined(PERL_IN_PP_SYS_C) || defined(PERL_DECL_PROT)
-STATIC OP*     S_doform(pTHX_ CV *cv, GV *gv, OP *retop);
-STATIC int     S_emulate_eaccess(pTHX_ const char* path, Mode_t mode);
+STATIC OP*     S_doform(pTHX_ CV *cv, GV *gv, OP *retop)
+                       __attribute__nonnull__(pTHX_1)
+                       __attribute__nonnull__(pTHX_2)
+                       __attribute__nonnull__(pTHX_3);
+
+STATIC int     S_emulate_eaccess(pTHX_ const char* path, Mode_t mode)
+                       __attribute__nonnull__(pTHX_1);
+
 #  if !defined(HAS_MKDIR) || !defined(HAS_RMDIR)
-STATIC int     S_dooneliner(pTHX_ char *cmd, char *filename);
+STATIC int     S_dooneliner(pTHX_ const char *cmd, const char *filename)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1)
+                       __attribute__nonnull__(pTHX_2);
+
 #  endif
 #endif
 
 #if defined(PERL_IN_REGCOMP_C) || defined(PERL_DECL_PROT)
-STATIC regnode*        S_reg(pTHX_ struct RExC_state_t*, I32, I32 *);
-STATIC regnode*        S_reganode(pTHX_ struct RExC_state_t*, U8, U32);
-STATIC regnode*        S_regatom(pTHX_ struct RExC_state_t*, I32 *);
-STATIC regnode*        S_regbranch(pTHX_ struct RExC_state_t*, I32 *, I32);
-STATIC void    S_reguni(pTHX_ struct RExC_state_t*, UV, char *, STRLEN*);
-STATIC regnode*        S_regclass(pTHX_ struct RExC_state_t*);
+STATIC regnode*        S_reg(pTHX_ struct RExC_state_t *state, I32 paren, I32 *flagp)
+                       __attribute__nonnull__(pTHX_1)
+                       __attribute__nonnull__(pTHX_3);
+
+STATIC regnode*        S_reganode(pTHX_ struct RExC_state_t *state, U8 op, U32 arg)
+                       __attribute__nonnull__(pTHX_1);
+
+STATIC regnode*        S_regatom(pTHX_ struct RExC_state_t *state, I32 *flagp)
+                       __attribute__nonnull__(pTHX_1)
+                       __attribute__nonnull__(pTHX_2);
+
+STATIC regnode*        S_regbranch(pTHX_ struct RExC_state_t *state, I32 *flagp, I32 first)
+                       __attribute__nonnull__(pTHX_1)
+                       __attribute__nonnull__(pTHX_2);
+
+STATIC void    S_reguni(pTHX_ const struct RExC_state_t *state, UV uv, char *s, STRLEN *lenp)
+                       __attribute__nonnull__(pTHX_1)
+                       __attribute__nonnull__(pTHX_3)
+                       __attribute__nonnull__(pTHX_4);
+
+STATIC regnode*        S_regclass(pTHX_ struct RExC_state_t *state)
+                       __attribute__nonnull__(pTHX_1);
+
 STATIC I32     S_regcurly(pTHX_ const char *)
                        __attribute__warn_unused_result__
                        __attribute__nonnull__(pTHX_1);
 
-STATIC regnode*        S_reg_node(pTHX_ struct RExC_state_t*, U8);
-STATIC regnode*        S_regpiece(pTHX_ struct RExC_state_t*, I32 *);
-STATIC void    S_reginsert(pTHX_ struct RExC_state_t*, U8, regnode *);
-STATIC void    S_regoptail(pTHX_ struct RExC_state_t*, regnode *, regnode *);
-STATIC void    S_regtail(pTHX_ struct RExC_state_t*, regnode *, regnode *);
-STATIC char*   S_regwhite(pTHX_ char *, char *);
-STATIC char*   S_nextchar(pTHX_ struct RExC_state_t*);
+STATIC regnode*        S_reg_node(pTHX_ struct RExC_state_t *state, U8 op)
+                       __attribute__nonnull__(pTHX_1);
+
+STATIC regnode*        S_regpiece(pTHX_ struct RExC_state_t *state, I32 *flagp)
+                       __attribute__nonnull__(pTHX_1)
+                       __attribute__nonnull__(pTHX_2);
+
+STATIC void    S_reginsert(pTHX_ struct RExC_state_t *state, U8 op, regnode *opnd)
+                       __attribute__nonnull__(pTHX_1)
+                       __attribute__nonnull__(pTHX_3);
+
+STATIC void    S_regoptail(pTHX_ struct RExC_state_t *state, regnode *p, regnode *val)
+                       __attribute__nonnull__(pTHX_1)
+                       __attribute__nonnull__(pTHX_2)
+                       __attribute__nonnull__(pTHX_3);
+
+STATIC void    S_regtail(pTHX_ struct RExC_state_t *state, regnode *p, regnode *val)
+                       __attribute__nonnull__(pTHX_1)
+                       __attribute__nonnull__(pTHX_2)
+                       __attribute__nonnull__(pTHX_3);
+
+STATIC char*   S_regwhite(pTHX_ char *p, const char *e)
+                       __attribute__nonnull__(pTHX_1)
+                       __attribute__nonnull__(pTHX_2);
+
+STATIC char*   S_nextchar(pTHX_ struct RExC_state_t*)
+                       __attribute__nonnull__(pTHX_1);
+
 #  ifdef DEBUGGING
 STATIC regnode*        S_dumpuntil(pTHX_ regnode *start, regnode *node, regnode *last, SV* sv, I32 l);
-STATIC void    S_put_byte(pTHX_ SV* sv, int c);
+STATIC void    S_put_byte(pTHX_ SV* sv, int c)
+                       __attribute__nonnull__(pTHX_1);
+
 #  endif
 STATIC void    S_scan_commit(pTHX_ struct RExC_state_t*, struct scan_data_t *data);
-STATIC void    S_cl_anything(pTHX_ struct RExC_state_t*, struct regnode_charclass_class *cl);
-STATIC int     S_cl_is_anything(pTHX_ struct regnode_charclass_class *cl);
-STATIC void    S_cl_init(pTHX_ struct RExC_state_t*, struct regnode_charclass_class *cl);
-STATIC void    S_cl_init_zero(pTHX_ struct RExC_state_t*, struct regnode_charclass_class *cl);
-STATIC void    S_cl_and(pTHX_ struct regnode_charclass_class *cl, struct regnode_charclass_class *and_with);
-STATIC void    S_cl_or(pTHX_ struct RExC_state_t*, struct regnode_charclass_class *cl, struct regnode_charclass_class *or_with);
+STATIC void    S_cl_anything(pTHX_ struct RExC_state_t*, struct regnode_charclass_class *cl)
+                       __attribute__nonnull__(pTHX_1)
+                       __attribute__nonnull__(pTHX_2);
+
+STATIC int     S_cl_is_anything(pTHX_ const struct regnode_charclass_class *cl)
+                       __attribute__nonnull__(pTHX_1);
+
+STATIC void    S_cl_init(pTHX_ struct RExC_state_t*, struct regnode_charclass_class *cl)
+                       __attribute__nonnull__(pTHX_1)
+                       __attribute__nonnull__(pTHX_2);
+
+STATIC void    S_cl_init_zero(pTHX_ struct RExC_state_t*, struct regnode_charclass_class *cl)
+                       __attribute__nonnull__(pTHX_1)
+                       __attribute__nonnull__(pTHX_2);
+
+STATIC void    S_cl_and(pTHX_ struct regnode_charclass_class *cl, const struct regnode_charclass_class *and_with)
+                       __attribute__nonnull__(pTHX_1);
+
+STATIC void    S_cl_or(pTHX_ struct RExC_state_t*, struct regnode_charclass_class *cl, const struct regnode_charclass_class *or_with)
+                       __attribute__nonnull__(pTHX_1)
+                       __attribute__nonnull__(pTHX_2)
+                       __attribute__nonnull__(pTHX_3);
+
 STATIC I32     S_study_chunk(pTHX_ struct RExC_state_t*, regnode **scanp, I32 *deltap, regnode *last, struct scan_data_t *data, U32 flags, U32 depth);
 STATIC I32     S_add_data(pTHX_ struct RExC_state_t*, I32 n, const char *s);
 STATIC void    S_re_croak2(pTHX_ const char* pat1, const char* pat2, ...)
@@ -2050,43 +2571,38 @@ STATIC void     S_debprof(pTHX_ const OP *o);
 STATIC SV*     S_save_scalar_at(pTHX_ SV **sptr);
 #endif
 
+#if defined(PERL_IN_GV_C) || defined(PERL_IN_SV_C) || defined(PERL_IN_PAD_C) || defined(PERL_DECL_PROT)
+PERL_CALLCONV void     Perl_sv_add_backref(pTHX_ SV *tsv, SV *sv)
+                       __attribute__nonnull__(pTHX_1)
+                       __attribute__nonnull__(pTHX_2);
+
+#endif
+
 #if defined(PERL_IN_SV_C) || defined(PERL_DECL_PROT)
-STATIC IV      S_asIV(pTHX_ SV* sv);
-STATIC UV      S_asUV(pTHX_ SV* sv);
-STATIC XPVIV*  S_new_xiv(pTHX);
-STATIC XPVNV*  S_new_xnv(pTHX);
-STATIC XPV*    S_new_xpv(pTHX);
-STATIC XPVIV*  S_new_xpviv(pTHX);
-STATIC XPVNV*  S_new_xpvnv(pTHX);
-STATIC XPVCV*  S_new_xpvcv(pTHX);
-STATIC XPVAV*  S_new_xpvav(pTHX);
-STATIC XPVHV*  S_new_xpvhv(pTHX);
-STATIC XPVMG*  S_new_xpvmg(pTHX);
-STATIC XPVGV*  S_new_xpvgv(pTHX);
-STATIC XPVLV*  S_new_xpvlv(pTHX);
-STATIC XPVBM*  S_new_xpvbm(pTHX);
-STATIC XRV*    S_new_xrv(pTHX);
-STATIC void    S_del_xiv(pTHX_ XPVIV* p);
-STATIC void    S_del_xnv(pTHX_ XPVNV* p);
-STATIC void    S_del_xpv(pTHX_ XPV* p);
-STATIC void    S_del_xpviv(pTHX_ XPVIV* p);
-STATIC void    S_del_xpvnv(pTHX_ XPVNV* p);
-STATIC void    S_del_xpvcv(pTHX_ XPVCV* p);
-STATIC void    S_del_xpvav(pTHX_ XPVAV* p);
-STATIC void    S_del_xpvhv(pTHX_ XPVHV* p);
-STATIC void    S_del_xpvmg(pTHX_ XPVMG* p);
-STATIC void    S_del_xpvgv(pTHX_ XPVGV* p);
-STATIC void    S_del_xpvlv(pTHX_ XPVLV* p);
-STATIC void    S_del_xpvbm(pTHX_ XPVBM* p);
-STATIC void    S_del_xrv(pTHX_ XRV* p);
-STATIC void    S_sv_unglob(pTHX_ SV* sv);
-STATIC void    S_not_a_number(pTHX_ SV *sv);
-STATIC I32     S_visit(pTHX_ SVFUNC_t f, U32 flags, U32 mask);
-STATIC void    S_sv_add_backref(pTHX_ SV *tsv, SV *sv);
-STATIC void    S_sv_del_backref(pTHX_ SV *sv);
-STATIC SV *    S_varname(pTHX_ GV *gv, const char *gvtype, PADOFFSET targ, SV *keyname, I32 aindex, int subscript_type)
+STATIC IV      S_asIV(pTHX_ SV* sv)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+STATIC UV      S_asUV(pTHX_ SV* sv)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+STATIC void    S_sv_unglob(pTHX_ SV* sv)
+                       __attribute__nonnull__(pTHX_1);
+
+STATIC void    S_not_a_number(pTHX_ SV *sv)
+                       __attribute__nonnull__(pTHX_1);
+
+STATIC I32     S_visit(pTHX_ SVFUNC_t f, U32 flags, U32 mask)
+                       __attribute__nonnull__(pTHX_1);
+
+STATIC void    S_sv_del_backref(pTHX_ SV *target, SV *ref)
+                       __attribute__nonnull__(pTHX_1)
                        __attribute__nonnull__(pTHX_2);
 
+STATIC SV *    S_varname(pTHX_ GV *gv, const char gvtype, PADOFFSET targ, SV *keyname, I32 aindex, int subscript_type)
+                       __attribute__warn_unused_result__;
+
 #  ifdef DEBUGGING
 STATIC void    S_del_sv(pTHX_ SV *p);
 #  endif
@@ -2098,10 +2614,7 @@ STATIC I32       S_expect_number(pTHX_ char** pattern)
                        __attribute__nonnull__(pTHX_1);
 
 #
-#  if defined(USE_ITHREADS)
-STATIC SV*     S_gv_share(pTHX_ SV *sv, CLONE_PARAMS *param);
-#  endif
-STATIC bool    S_utf8_mg_pos(pTHX_ SV *sv, MAGIC **mgp, STRLEN **cachep, I32 i, I32 *offsetp, I32 uoff, U8 **sp, U8 *start, U8 *send)
+STATIC bool    S_utf8_mg_pos(pTHX_ SV *sv, MAGIC **mgp, STRLEN **cachep, I32 i, I32 *offsetp, I32 uoff, const U8 **sp, const U8 *start, const U8 *send)
                        __attribute__nonnull__(pTHX_1)
                        __attribute__nonnull__(pTHX_2)
                        __attribute__nonnull__(pTHX_3)
@@ -2110,15 +2623,15 @@ STATIC bool     S_utf8_mg_pos(pTHX_ SV *sv, MAGIC **mgp, STRLEN **cachep, I32 i, I32
                        __attribute__nonnull__(pTHX_8)
                        __attribute__nonnull__(pTHX_9);
 
-STATIC bool    S_utf8_mg_pos_init(pTHX_ SV *sv, MAGIC **mgp, STRLEN **cachep, I32 i, I32 offsetp, U8 *s, U8 *start)
+STATIC bool    S_utf8_mg_pos_init(pTHX_ SV *sv, MAGIC **mgp, STRLEN **cachep, I32 i, I32 offsetp, const U8 *s, const U8 *start)
                        __attribute__nonnull__(pTHX_1)
                        __attribute__nonnull__(pTHX_2)
                        __attribute__nonnull__(pTHX_3)
                        __attribute__nonnull__(pTHX_6)
                        __attribute__nonnull__(pTHX_7);
 
-#if defined(PERL_COPY_ON_WRITE)
-STATIC void    S_sv_release_COW(pTHX_ SV *sv, char *pvx, STRLEN cur, STRLEN len, U32 hash, SV *after);
+#if defined(PERL_OLD_COPY_ON_WRITE)
+STATIC void    S_sv_release_COW(pTHX_ SV *sv, const char *pvx, STRLEN len, SV *after);
 #endif
 #endif
 
@@ -2193,12 +2706,16 @@ STATIC SV*      S_isa_lookup(pTHX_ HV *stash, const char *name, HV *name_stash, int l
 
 #if defined(PERL_IN_LOCALE_C) || defined(PERL_DECL_PROT)
 #if defined(USE_LOCALE_NUMERIC) || defined(USE_LOCALE_COLLATE)
-STATIC char*   S_stdize_locale(pTHX_ char* locs);
+STATIC char*   S_stdize_locale(pTHX_ char* locs)
+                       __attribute__nonnull__(pTHX_1);
+
 #endif
 #endif
 
 #if defined(PERL_IN_UTIL_C) || defined(PERL_DECL_PROT)
-STATIC COP*    S_closest_cop(pTHX_ COP *cop, OP *o);
+STATIC COP*    S_closest_cop(pTHX_ COP *cop, const OP *o)
+                       __attribute__nonnull__(pTHX_1);
+
 STATIC SV*     S_mess_alloc(pTHX);
 #endif
 
@@ -2206,6 +2723,12 @@ STATIC SV*       S_mess_alloc(pTHX);
 STATIC NV      S_mulexp10(NV value, I32 exponent);
 #endif
 
+#if defined(PERL_IN_UTF8_C) || defined(PERL_DECL_PROT)
+STATIC STRLEN  S_is_utf8_char_slow(pTHX_ const U8 *s, const STRLEN len)
+                       __attribute__nonnull__(pTHX_1);
+
+#endif
+
 START_EXTERN_C
 
 PERL_CALLCONV void     Perl_sv_setsv_flags(pTHX_ SV* dsv, SV* ssv, I32 flags)
@@ -2221,9 +2744,7 @@ PERL_CALLCONV void        Perl_sv_catsv_flags(pTHX_ SV* dsv, SV* ssv, I32 flags)
 PERL_CALLCONV STRLEN   Perl_sv_utf8_upgrade_flags(pTHX_ SV *sv, I32 flags)
                        __attribute__nonnull__(pTHX_1);
 
-PERL_CALLCONV char*    Perl_sv_pvn_force_flags(pTHX_ SV* sv, STRLEN* lp, I32 flags)
-                       __attribute__nonnull__(pTHX_2);
-
+PERL_CALLCONV char*    Perl_sv_pvn_force_flags(pTHX_ SV* sv, STRLEN* lp, I32 flags);
 PERL_CALLCONV void     Perl_sv_copypv(pTHX_ SV* dsv, SV* ssv)
                        __attribute__nonnull__(pTHX_1)
                        __attribute__nonnull__(pTHX_2);
@@ -2233,31 +2754,39 @@ PERL_CALLCONV char*     Perl_my_atof2(pTHX_ const char *s, NV* value)
                        __attribute__nonnull__(pTHX_2);
 
 PERL_CALLCONV int      Perl_my_socketpair(int family, int type, int protocol, int fd[2]);
-#ifdef PERL_COPY_ON_WRITE
+#ifdef PERL_OLD_COPY_ON_WRITE
 PERL_CALLCONV SV*      Perl_sv_setsv_cow(pTHX_ SV* dsv, SV* ssv);
 #endif
 
 #if defined(USE_PERLIO) && !defined(USE_SFIO)
-PERL_CALLCONV int      Perl_PerlIO_close(pTHX_ PerlIO *);
-PERL_CALLCONV int      Perl_PerlIO_fill(pTHX_ PerlIO *);
-PERL_CALLCONV int      Perl_PerlIO_fileno(pTHX_ PerlIO *);
-PERL_CALLCONV int      Perl_PerlIO_eof(pTHX_ PerlIO *);
-PERL_CALLCONV int      Perl_PerlIO_error(pTHX_ PerlIO *);
-PERL_CALLCONV int      Perl_PerlIO_flush(pTHX_ PerlIO *);
-PERL_CALLCONV void     Perl_PerlIO_clearerr(pTHX_ PerlIO *);
-PERL_CALLCONV void     Perl_PerlIO_set_cnt(pTHX_ PerlIO *, int);
-PERL_CALLCONV void     Perl_PerlIO_set_ptrcnt(pTHX_ PerlIO *, STDCHAR *, int);
-PERL_CALLCONV void     Perl_PerlIO_setlinebuf(pTHX_ PerlIO *);
-PERL_CALLCONV SSize_t  Perl_PerlIO_read(pTHX_ PerlIO *, void *, Size_t);
-PERL_CALLCONV SSize_t  Perl_PerlIO_write(pTHX_ PerlIO *, const void *, Size_t);
-PERL_CALLCONV SSize_t  Perl_PerlIO_unread(pTHX_ PerlIO *, const void *, Size_t);
-PERL_CALLCONV Off_t    Perl_PerlIO_tell(pTHX_ PerlIO *);
-PERL_CALLCONV int      Perl_PerlIO_seek(pTHX_ PerlIO *, Off_t, int);
-
-PERL_CALLCONV STDCHAR *        Perl_PerlIO_get_base(pTHX_ PerlIO *);
-PERL_CALLCONV STDCHAR *        Perl_PerlIO_get_ptr(pTHX_ PerlIO *);
-PERL_CALLCONV int      Perl_PerlIO_get_bufsiz(pTHX_ PerlIO *);
-PERL_CALLCONV int      Perl_PerlIO_get_cnt(pTHX_ PerlIO *);
+PERL_CALLCONV int      Perl_PerlIO_close(pTHX_ PerlIO *f);
+PERL_CALLCONV int      Perl_PerlIO_fill(pTHX_ PerlIO *f);
+PERL_CALLCONV int      Perl_PerlIO_fileno(pTHX_ PerlIO *f);
+PERL_CALLCONV int      Perl_PerlIO_eof(pTHX_ PerlIO *f);
+PERL_CALLCONV int      Perl_PerlIO_error(pTHX_ PerlIO *f);
+PERL_CALLCONV int      Perl_PerlIO_flush(pTHX_ PerlIO *f);
+PERL_CALLCONV void     Perl_PerlIO_clearerr(pTHX_ PerlIO *f);
+PERL_CALLCONV void     Perl_PerlIO_set_cnt(pTHX_ PerlIO *f, int cnt);
+PERL_CALLCONV void     Perl_PerlIO_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR *ptr, int cnt)
+                       __attribute__nonnull__(pTHX_2);
+
+PERL_CALLCONV void     Perl_PerlIO_setlinebuf(pTHX_ PerlIO *f);
+PERL_CALLCONV SSize_t  Perl_PerlIO_read(pTHX_ PerlIO *f, void *buf, Size_t count)
+                       __attribute__nonnull__(pTHX_2);
+
+PERL_CALLCONV SSize_t  Perl_PerlIO_write(pTHX_ PerlIO *f, const void *buf, Size_t count)
+                       __attribute__nonnull__(pTHX_2);
+
+PERL_CALLCONV SSize_t  Perl_PerlIO_unread(pTHX_ PerlIO *f, const void *buf, Size_t count)
+                       __attribute__nonnull__(pTHX_2);
+
+PERL_CALLCONV Off_t    Perl_PerlIO_tell(pTHX_ PerlIO *f);
+PERL_CALLCONV int      Perl_PerlIO_seek(pTHX_ PerlIO *f, Off_t offset, int whence);
+
+PERL_CALLCONV STDCHAR *        Perl_PerlIO_get_base(pTHX_ PerlIO *f);
+PERL_CALLCONV STDCHAR *        Perl_PerlIO_get_ptr(pTHX_ PerlIO *f);
+PERL_CALLCONV int      Perl_PerlIO_get_bufsiz(pTHX_ PerlIO *f);
+PERL_CALLCONV int      Perl_PerlIO_get_cnt(pTHX_ PerlIO *f);
 
 PERL_CALLCONV PerlIO * Perl_PerlIO_stdin(pTHX);
 PERL_CALLCONV PerlIO * Perl_PerlIO_stdout(pTHX);
@@ -2269,28 +2798,47 @@ PERL_CALLCONV void      Perl_deb_stack_all(pTHX);
 STATIC void    S_deb_stack_n(pTHX_ SV** stack_base, I32 stack_min, I32 stack_max, I32 mark_min, I32 mark_max);
 #endif
 
-PERL_CALLCONV PADLIST* Perl_pad_new(pTHX_ int flags);
+PERL_CALLCONV PADLIST* Perl_pad_new(pTHX_ int flags)
+                       __attribute__malloc__
+                       __attribute__warn_unused_result__;
+
 PERL_CALLCONV void     Perl_pad_undef(pTHX_ CV* cv);
 PERL_CALLCONV PADOFFSET        Perl_pad_add_name(pTHX_ const char *name, HV* typestash, HV* ourstash, bool clone)
                        __attribute__nonnull__(pTHX_1);
 
 PERL_CALLCONV PADOFFSET        Perl_pad_add_anon(pTHX_ SV* sv, OPCODE op_type);
-PERL_CALLCONV void     Perl_pad_check_dup(pTHX_ const char* name, bool is_our, const HV* ourstash);
+PERL_CALLCONV void     Perl_pad_check_dup(pTHX_ const char* name, bool is_our, const HV* ourstash)
+                       __attribute__nonnull__(pTHX_1)
+                       __attribute__nonnull__(pTHX_3);
+
 #ifdef DEBUGGING
-PERL_CALLCONV void     Perl_pad_setsv(pTHX_ PADOFFSET po, SV* sv);
+PERL_CALLCONV void     Perl_pad_setsv(pTHX_ PADOFFSET po, SV* sv)
+                       __attribute__nonnull__(pTHX_2);
+
 #endif
 PERL_CALLCONV void     Perl_pad_block_start(pTHX_ int full);
 PERL_CALLCONV void     Perl_pad_tidy(pTHX_ padtidy_type type);
-PERL_CALLCONV void     Perl_do_dump_pad(pTHX_ I32 level, PerlIO *file, PADLIST *padlist, int full);
-PERL_CALLCONV void     Perl_pad_fixup_inner_anons(pTHX_ PADLIST *padlist, CV *old_cv, CV *new_cv);
+PERL_CALLCONV void     Perl_do_dump_pad(pTHX_ I32 level, PerlIO *file, PADLIST *padlist, int full)
+                       __attribute__nonnull__(pTHX_2);
+
+PERL_CALLCONV void     Perl_pad_fixup_inner_anons(pTHX_ PADLIST *padlist, CV *old_cv, CV *new_cv)
+                       __attribute__nonnull__(pTHX_1);
+
+
+PERL_CALLCONV void     Perl_pad_push(pTHX_ PADLIST *padlist, int depth)
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV HV*      Perl_pad_compname_type(pTHX_ const PADOFFSET po)
+                       __attribute__warn_unused_result__;
 
-PERL_CALLCONV void     Perl_pad_push(pTHX_ PADLIST *padlist, int depth);
-PERL_CALLCONV HV*      Perl_pad_compname_type(pTHX_ const PADOFFSET po);
 
 #if defined(PERL_IN_PAD_C) || defined(PERL_DECL_PROT)
 STATIC PADOFFSET       S_pad_findlex(pTHX_ const char *name, const CV* cv, U32 seq, int warn, SV** out_capture, SV** out_name_sv, int *out_flags);
 #  if defined(DEBUGGING)
-STATIC void    S_cv_dump(pTHX_ const CV *cv, const char *title);
+STATIC void    S_cv_dump(pTHX_ const CV *cv, const char *title)
+                       __attribute__nonnull__(pTHX_1)
+                       __attribute__nonnull__(pTHX_2);
+
 #  endif
 #endif
 PERL_CALLCONV CV*      Perl_find_runcv(pTHX_ U32 *db_seqp)
@@ -2301,22 +2849,50 @@ PERL_CALLCONV void      Perl_free_tied_hv_pool(pTHX);
 PERL_CALLCONV int      Perl_get_debug_opts(pTHX_ const char **s, bool givehelp);
 #endif
 PERL_CALLCONV void     Perl_save_set_svflags(pTHX_ SV* sv, U32 mask, U32 val);
-PERL_CALLCONV void     Perl_hv_assert(pTHX_ HV* tb);
+PERL_CALLCONV void     Perl_hv_assert(pTHX_ HV* tb)
+                       __attribute__nonnull__(pTHX_1);
 
-#if defined(PERL_IN_HV_C) || defined(PERL_DECL_PROT)
-STATIC SV*     S_hv_delete_common(pTHX_ HV* tb, SV* key_sv, const char* key, STRLEN klen, int k_flags, I32 d_flags, U32 hash);
-STATIC HE*     S_hv_fetch_common(pTHX_ HV* tb, SV* key_sv, const char* key, STRLEN klen, int flags, int action, SV* val, U32 hash);
-#endif
 
-PERL_CALLCONV void     Perl_hv_clear_placeholders(pTHX_ HV* hb);
+PERL_CALLCONV SV*      Perl_hv_scalar(pTHX_ HV* hv)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV I32*     Perl_hv_riter_p(pTHX_ HV* hv)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV HE**     Perl_hv_eiter_p(pTHX_ HV* hv)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
 
-PERL_CALLCONV SV*      Perl_hv_scalar(pTHX_ HV* hv);
+PERL_CALLCONV void     Perl_hv_riter_set(pTHX_ HV* hv, I32 riter)
+                       __attribute__nonnull__(pTHX_1);
 
-PERL_CALLCONV I32*     Perl_hv_placeholders_p(pTHX_ HV* hv);
-PERL_CALLCONV I32      Perl_hv_placeholders_get(pTHX_ HV* hv);
-PERL_CALLCONV void     Perl_hv_placeholders_set(pTHX_ HV* hv, I32 ph);
+PERL_CALLCONV void     Perl_hv_eiter_set(pTHX_ HV* hv, HE* eiter)
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV void     Perl_hv_name_set(pTHX_ HV* hv, const char *name, I32 len, int flags)
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV void     Perl_hv_clear_placeholders(pTHX_ HV* hb)
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV I32*     Perl_hv_placeholders_p(pTHX_ HV* hv)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV I32      Perl_hv_placeholders_get(pTHX_ HV* hv)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV void     Perl_hv_placeholders_set(pTHX_ HV* hv, I32 ph)
+                       __attribute__nonnull__(pTHX_1);
+
+
+PERL_CALLCONV SV*      Perl_magic_scalarpack(pTHX_ HV* hv, MAGIC* mg)
+                       __attribute__nonnull__(pTHX_1)
+                       __attribute__nonnull__(pTHX_2);
 
-PERL_CALLCONV SV*      Perl_magic_scalarpack(pTHX_ HV* hv, MAGIC*      mg);
 #ifdef PERL_IN_SV_C
 STATIC SV*     S_find_uninit_var(pTHX_ OP* obase, SV* uninit_sv, bool top);
 #endif
@@ -2399,9 +2975,35 @@ PERL_CALLCONV void       Perl_my_swabn(void* ptr, int n);
 
 PERL_CALLCONV GV*      Perl_gv_fetchpvn_flags(pTHX_ const char* name, STRLEN len, I32 flags, I32 sv_type);
 PERL_CALLCONV GV*      Perl_gv_fetchsv(pTHX_ SV *name, I32 flags, I32 sv_type);
-PERL_CALLCONV bool     Perl_is_gv_magical_sv(pTHX_ SV *name, U32 flags);
+PERL_CALLCONV bool     Perl_is_gv_magical_sv(pTHX_ SV *name, U32 flags)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1);
+
+
+PERL_CALLCONV bool     Perl_stashpv_hvname_match(pTHX_ const COP *cop, const HV *hv)
+                       __attribute__warn_unused_result__
+                       __attribute__nonnull__(pTHX_1)
+                       __attribute__nonnull__(pTHX_2);
+
+
+#ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
+PERL_CALLCONV void     Perl_dump_sv_child(pTHX_ SV *sv);
+#endif
+
+#ifdef PERL_DONT_CREATE_GVSV
+PERL_CALLCONV GV*      Perl_gv_SVadd(pTHX_ GV* gv)
+                       __attribute__nonnull__(pTHX_1);
+
+#endif
+PERL_CALLCONV bool     Perl_ckwarn(pTHX_ U32 w);
+PERL_CALLCONV bool     Perl_ckwarn_d(pTHX_ U32 w);
+
+PERL_CALLCONV void     Perl_offer_nice_chunk(pTHX_ void *chunk, U32 chunk_size)
+                       __attribute__nonnull__(pTHX_1);
 
-PERL_CALLCONV char*    Perl_savesvpv(pTHX_ SV* sv);
 
 END_EXTERN_C
+/*
+ * ex: set ts=8 sts=4 sw=4 noet:
+ */
 /* ex: set ro: */