X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=proto.h;h=87180355ae32083ef42edeeb8cb6486e706ace9d;hb=c74ace89800a81a764294e9f6eacc04bbed5a568;hp=627b25e3dbe80b9bbd0aae9d4dceefe49d3f9882;hpb=6867be6d47d7be8fc56705e4b65f064d3eef92b7;p=p5sagit%2Fp5-mst-13.2.git

diff --git a/proto.h b/proto.h
index 627b25e..8718035 100644
--- a/proto.h
+++ b/proto.h
@@ -1,4 +1,5 @@
-/*
+/*  -*- buffer-read-only: t -*-
+ *
  *    proto.h
  *
  *    Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999,
@@ -21,10 +22,18 @@ START_EXTERN_C
 PERL_CALLCONV PerlInterpreter*	perl_alloc_using(struct IPerlMem* m, struct IPerlMem* ms, struct IPerlMem* mp, struct IPerlEnv* e, struct IPerlStdIO* io, struct IPerlLIO* lio, struct IPerlDir* d, struct IPerlSock* s, struct IPerlProc* p);
 #endif
 PERL_CALLCONV PerlInterpreter*	perl_alloc(void);
-PERL_CALLCONV void	perl_construct(PerlInterpreter* interp);
-PERL_CALLCONV int	perl_destruct(PerlInterpreter* interp);
-PERL_CALLCONV void	perl_free(PerlInterpreter* interp);
-PERL_CALLCONV int	perl_run(PerlInterpreter* interp);
+PERL_CALLCONV void	perl_construct(PerlInterpreter* interp)
+			__attribute__nonnull__(1);
+
+PERL_CALLCONV int	perl_destruct(PerlInterpreter* interp)
+			__attribute__nonnull__(1);
+
+PERL_CALLCONV void	perl_free(PerlInterpreter* interp)
+			__attribute__nonnull__(1);
+
+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);
 #if defined(USE_ITHREADS)
@@ -34,9 +43,18 @@ PERL_CALLCONV PerlInterpreter*	perl_clone_using(PerlInterpreter *interp, UV flag
 #  endif
 #endif
 
-PERL_CALLCONV Malloc_t	Perl_malloc(MEM_SIZE nbytes);
-PERL_CALLCONV Malloc_t	Perl_calloc(MEM_SIZE elements, MEM_SIZE size);
-PERL_CALLCONV Malloc_t	Perl_realloc(Malloc_t where, MEM_SIZE nbytes);
+PERL_CALLCONV Malloc_t	Perl_malloc(MEM_SIZE nbytes)
+			__attribute__malloc__
+			__attribute__warn_unused_result__;
+
+PERL_CALLCONV Malloc_t	Perl_calloc(MEM_SIZE elements, MEM_SIZE size)
+			__attribute__malloc__
+			__attribute__warn_unused_result__;
+
+PERL_CALLCONV Malloc_t	Perl_realloc(Malloc_t where, MEM_SIZE nbytes)
+			__attribute__malloc__
+			__attribute__warn_unused_result__;
+
 PERL_CALLCONV Free_t	Perl_mfree(Malloc_t where);
 #if defined(MYMALLOC)
 PERL_CALLCONV MEM_SIZE	Perl_malloced_size(void *p);
@@ -58,29 +76,64 @@ 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);
-PERL_CALLCONV bool	Perl_av_exists(pTHX_ AV* ar, I32 key);
-PERL_CALLCONV void	Perl_av_extend(pTHX_ AV* ar, I32 key);
-PERL_CALLCONV AV*	Perl_av_fake(pTHX_ I32 size, SV** svp);
-PERL_CALLCONV SV**	Perl_av_fetch(pTHX_ AV* ar, I32 key, I32 lval);
+PERL_CALLCONV SV*	Perl_av_delete(pTHX_ AV* ar, I32 key, I32 flags)
+			__attribute__warn_unused_result__;
+
+PERL_CALLCONV bool	Perl_av_exists(pTHX_ AV* ar, I32 key)
+			__attribute__warn_unused_result__;
+
+PERL_CALLCONV void	Perl_av_extend(pTHX_ AV* ar, I32 key)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV AV*	Perl_av_fake(pTHX_ I32 size, SV** svp)
+			__attribute__warn_unused_result__
+			__attribute__nonnull__(pTHX_2);
+
+PERL_CALLCONV SV**	Perl_av_fetch(pTHX_ AV* ar, I32 key, I32 lval)
+			__attribute__warn_unused_result__;
+
 PERL_CALLCONV void	Perl_av_fill(pTHX_ AV* ar, I32 fill);
-PERL_CALLCONV I32	Perl_av_len(pTHX_ const AV* ar);
-PERL_CALLCONV AV*	Perl_av_make(pTHX_ I32 size, SV** svp);
-PERL_CALLCONV SV*	Perl_av_pop(pTHX_ AV* ar);
+PERL_CALLCONV I32	Perl_av_len(pTHX_ const AV* ar)
+			__attribute__warn_unused_result__;
+
+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 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);
+PERL_CALLCONV SV*	Perl_av_shift(pTHX_ AV* ar)
+			__attribute__warn_unused_result__;
+
 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 OP*	Perl_bind_match(pTHX_ I32 type, OP* left, OP* pat);
-PERL_CALLCONV OP*	Perl_block_end(pTHX_ I32 floor, OP* seq);
-PERL_CALLCONV I32	Perl_block_gimme(pTHX);
-PERL_CALLCONV int	Perl_block_start(pTHX_ int full);
+PERL_CALLCONV OP*	Perl_bind_match(pTHX_ I32 type, OP* left, OP* pat)
+			__attribute__warn_unused_result__
+			__attribute__nonnull__(pTHX_2)
+			__attribute__nonnull__(pTHX_3);
+
+PERL_CALLCONV OP*	Perl_block_end(pTHX_ I32 floor, OP* seq)
+			__attribute__warn_unused_result__;
+
+PERL_CALLCONV I32	Perl_block_gimme(pTHX)
+			__attribute__warn_unused_result__;
+
+PERL_CALLCONV int	Perl_block_start(pTHX_ int full)
+			__attribute__warn_unused_result__;
+
 PERL_CALLCONV void	Perl_boot_core_UNIVERSAL(pTHX);
 PERL_CALLCONV void	Perl_boot_core_PerlIO(pTHX);
-PERL_CALLCONV void	Perl_call_list(pTHX_ I32 oldscope, AV* av_list);
-PERL_CALLCONV bool	Perl_cando(pTHX_ Mode_t mode, Uid_t effective, Stat_t* statbufp);
+PERL_CALLCONV void	Perl_call_list(pTHX_ I32 oldscope, AV* av_list)
+			__attribute__nonnull__(pTHX_2);
+
+PERL_CALLCONV bool	Perl_cando(pTHX_ Mode_t mode, Uid_t effective, const Stat_t* statbufp)
+			__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);
@@ -89,42 +142,65 @@ PERL_CALLCONV UV	Perl_cast_uv(pTHX_ NV f);
 PERL_CALLCONV I32	Perl_my_chsize(pTHX_ int fd, Off_t length);
 #endif
 PERL_CALLCONV OP*	Perl_convert(pTHX_ I32 optype, I32 flags, OP* o);
-PERL_CALLCONV void	Perl_croak(pTHX_ const char* pat, ...) __attribute__((noreturn))
-	__attribute__format__(__printf__,pTHX_1,pTHX_2);
-PERL_CALLCONV void	Perl_vcroak(pTHX_ const char* pat, va_list* args) __attribute__((noreturn));
+PERL_CALLCONV void	Perl_croak(pTHX_ const char* pat, ...)
+			__attribute__noreturn__
+			__attribute__format__(__printf__,pTHX_1,pTHX_2);
+
+PERL_CALLCONV void	Perl_vcroak(pTHX_ const char* pat, va_list* args)
+			__attribute__noreturn__;
+
 #if defined(PERL_IMPLICIT_CONTEXT)
-PERL_CALLCONV void	Perl_croak_nocontext(const char* pat, ...) __attribute__((noreturn))
-	__attribute__format__(__printf__,1,2);
+PERL_CALLCONV void	Perl_croak_nocontext(const char* pat, ...)
+			__attribute__noreturn__
+			__attribute__format__(__printf__,1,2);
+
 PERL_CALLCONV OP*	Perl_die_nocontext(const char* pat, ...)
-	__attribute__format__(__printf__,1,2);
+			__attribute__format__(__printf__,1,2);
+
 PERL_CALLCONV void	Perl_deb_nocontext(const char* pat, ...)
-	__attribute__format__(__printf__,1,2);
+			__attribute__format__(__printf__,1,2);
+
 PERL_CALLCONV char*	Perl_form_nocontext(const char* pat, ...)
-	__attribute__format__(__printf__,1,2);
+			__attribute__format__(__printf__,1,2);
+
 PERL_CALLCONV void	Perl_load_module_nocontext(U32 flags, SV* name, SV* ver, ...);
 PERL_CALLCONV SV*	Perl_mess_nocontext(const char* pat, ...)
-	__attribute__format__(__printf__,1,2);
+			__attribute__format__(__printf__,1,2);
+
 PERL_CALLCONV void	Perl_warn_nocontext(const char* pat, ...)
-	__attribute__format__(__printf__,1,2);
+			__attribute__format__(__printf__,1,2);
+
 PERL_CALLCONV void	Perl_warner_nocontext(U32 err, const char* pat, ...)
-	__attribute__format__(__printf__,2,3);
+			__attribute__format__(__printf__,2,3);
+
 PERL_CALLCONV SV*	Perl_newSVpvf_nocontext(const char* pat, ...)
-	__attribute__format__(__printf__,1,2);
+			__attribute__format__(__printf__,1,2);
+
 PERL_CALLCONV void	Perl_sv_catpvf_nocontext(SV* sv, const char* pat, ...)
-	__attribute__format__(__printf__,2,3);
+			__attribute__format__(__printf__,2,3);
+
 PERL_CALLCONV void	Perl_sv_setpvf_nocontext(SV* sv, const char* pat, ...)
-	__attribute__format__(__printf__,2,3);
+			__attribute__format__(__printf__,2,3);
+
 PERL_CALLCONV void	Perl_sv_catpvf_mg_nocontext(SV* sv, const char* pat, ...)
-	__attribute__format__(__printf__,2,3);
+			__attribute__format__(__printf__,2,3);
+
 PERL_CALLCONV void	Perl_sv_setpvf_mg_nocontext(SV* sv, const char* pat, ...)
-	__attribute__format__(__printf__,2,3);
+			__attribute__format__(__printf__,2,3);
+
 PERL_CALLCONV int	Perl_fprintf_nocontext(PerlIO* stream, const char* fmt, ...)
-	__attribute__format__(__printf__,2,3);
+			__attribute__format__(__printf__,2,3);
+
 PERL_CALLCONV int	Perl_printf_nocontext(const char* fmt, ...)
-	__attribute__format__(__printf__,1,2);
+			__attribute__format__(__printf__,1,2);
+
 #endif
-PERL_CALLCONV void	Perl_cv_ckproto(pTHX_ const CV* cv, const GV* gv, const char* p);
-PERL_CALLCONV CV*	Perl_cv_clone(pTHX_ CV* proto);
+PERL_CALLCONV void	Perl_cv_ckproto(pTHX_ const CV* cv, const GV* gv, const char* p)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV CV*	Perl_cv_clone(pTHX_ CV* proto)
+			__attribute__nonnull__(pTHX_1);
+
 PERL_CALLCONV SV*	Perl_cv_const_sv(pTHX_ CV* cv);
 PERL_CALLCONV SV*	Perl_op_const_sv(pTHX_ const OP* o, CV* cv);
 PERL_CALLCONV void	Perl_cv_undef(pTHX_ CV* cv);
@@ -132,35 +208,77 @@ PERL_CALLCONV void	Perl_cx_dump(pTHX_ PERL_CONTEXT* cs);
 PERL_CALLCONV SV*	Perl_filter_add(pTHX_ filter_t funcp, SV* datasv);
 PERL_CALLCONV void	Perl_filter_del(pTHX_ filter_t funcp);
 PERL_CALLCONV I32	Perl_filter_read(pTHX_ int idx, SV* buffer, int maxlen);
-PERL_CALLCONV char**	Perl_get_op_descs(pTHX);
-PERL_CALLCONV char**	Perl_get_op_names(pTHX);
-PERL_CALLCONV const char*	Perl_get_no_modify(pTHX);
-PERL_CALLCONV U32*	Perl_get_opargs(pTHX);
-PERL_CALLCONV PPADDR_t*	Perl_get_ppaddr(pTHX);
-PERL_CALLCONV I32	Perl_cxinc(pTHX);
+PERL_CALLCONV char**	Perl_get_op_descs(pTHX)
+			__attribute__warn_unused_result__
+			__attribute__pure__;
+
+PERL_CALLCONV char**	Perl_get_op_names(pTHX)
+			__attribute__warn_unused_result__
+			__attribute__pure__;
+
+PERL_CALLCONV const char*	Perl_get_no_modify(pTHX)
+			__attribute__warn_unused_result__
+			__attribute__pure__;
+
+PERL_CALLCONV U32*	Perl_get_opargs(pTHX)
+			__attribute__warn_unused_result__
+			__attribute__pure__;
+
+PERL_CALLCONV PPADDR_t*	Perl_get_ppaddr(pTHX)
+			__attribute__warn_unused_result__
+			__attribute__pure__;
+
+PERL_CALLCONV I32	Perl_cxinc(pTHX)
+			__attribute__warn_unused_result__;
+
 PERL_CALLCONV void	Perl_deb(pTHX_ const char* pat, ...)
-	__attribute__format__(__printf__,pTHX_1,pTHX_2);
+			__attribute__format__(__printf__,pTHX_1,pTHX_2);
+
 PERL_CALLCONV void	Perl_vdeb(pTHX_ const char* pat, va_list* args);
 PERL_CALLCONV void	Perl_debprofdump(pTHX);
-PERL_CALLCONV I32	Perl_debop(pTHX_ const OP* o);
+PERL_CALLCONV I32	Perl_debop(pTHX_ const OP* o)
+			__attribute__nonnull__(pTHX_1);
+
 PERL_CALLCONV I32	Perl_debstack(pTHX);
 PERL_CALLCONV I32	Perl_debstackptrs(pTHX);
-PERL_CALLCONV char*	Perl_delimcpy(pTHX_ char* to, const char* toend, const char* from, const char* fromend, int delim, I32* retlen);
-PERL_CALLCONV void	Perl_deprecate(pTHX_ const char* s);
-PERL_CALLCONV void	Perl_deprecate_old(pTHX_ const char* s);
+PERL_CALLCONV char*	Perl_delimcpy(pTHX_ char* to, const char* toend, const char* from, const char* fromend, int delim, I32* retlen)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2)
+			__attribute__nonnull__(pTHX_3)
+			__attribute__nonnull__(pTHX_4)
+			__attribute__nonnull__(pTHX_6);
+
+PERL_CALLCONV void	Perl_deprecate(pTHX_ const char* s)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV void	Perl_deprecate_old(pTHX_ const char* s)
+			__attribute__nonnull__(pTHX_1);
+
 PERL_CALLCONV OP*	Perl_die(pTHX_ const char* pat, ...)
-	__attribute__format__(__printf__,pTHX_1,pTHX_2);
+			__attribute__format__(__printf__,pTHX_1,pTHX_2);
+
 PERL_CALLCONV OP*	Perl_vdie(pTHX_ const char* pat, va_list* args);
 PERL_CALLCONV OP*	Perl_die_where(pTHX_ const char* message, STRLEN msglen);
 PERL_CALLCONV void	Perl_dounwind(pTHX_ I32 cxix);
 PERL_CALLCONV bool	Perl_do_aexec(pTHX_ SV* really, SV** mark, SV** sp);
 PERL_CALLCONV bool	Perl_do_aexec5(pTHX_ SV* really, SV** mark, SV** sp, int fd, int flag);
-PERL_CALLCONV int	Perl_do_binmode(pTHX_ PerlIO *fp, int iotype, int mode);
-PERL_CALLCONV void	Perl_do_chop(pTHX_ SV* asv, SV* sv);
-PERL_CALLCONV bool	Perl_do_close(pTHX_ GV* gv, bool not_implicit);
-PERL_CALLCONV bool	Perl_do_eof(pTHX_ GV* gv);
-PERL_CALLCONV bool	Perl_do_exec(pTHX_ char* cmd);
-#if defined(WIN32)
+PERL_CALLCONV int	Perl_do_binmode(pTHX_ PerlIO *fp, int iotype, int mode)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV void	Perl_do_chop(pTHX_ SV* asv, SV* sv)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2);
+
+PERL_CALLCONV bool	Perl_do_close(pTHX_ GV* gv, bool not_implicit)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV bool	Perl_do_eof(pTHX_ GV* gv)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV bool	Perl_do_exec(pTHX_ char* cmd)
+			__attribute__nonnull__(pTHX_1);
+
+#if defined(WIN32) || defined(SYMBIAN)
 PERL_CALLCONV int	Perl_do_aspawn(pTHX_ SV* really, SV** mark, SV** sp);
 PERL_CALLCONV int	Perl_do_spawn(pTHX_ char* cmd);
 PERL_CALLCONV int	Perl_do_spawn_nowait(pTHX_ char* cmd);
@@ -177,7 +295,12 @@ PERL_CALLCONV I32	Perl_do_msgsnd(pTHX_ SV** mark, SV** sp);
 PERL_CALLCONV I32	Perl_do_semop(pTHX_ SV** mark, SV** sp);
 PERL_CALLCONV I32	Perl_do_shmio(pTHX_ I32 optype, SV** mark, SV** sp);
 #endif
-PERL_CALLCONV void	Perl_do_join(pTHX_ SV* sv, SV* del, SV** mark, SV** sp);
+PERL_CALLCONV void	Perl_do_join(pTHX_ SV* sv, SV* del, SV** mark, SV** sp)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2)
+			__attribute__nonnull__(pTHX_3)
+			__attribute__nonnull__(pTHX_4);
+
 PERL_CALLCONV OP*	Perl_do_kv(pTHX);
 PERL_CALLCONV bool	Perl_do_open(pTHX_ GV* gv, char* name, I32 len, int as_raw, int rawmode, int rawperm, PerlIO* supplied_fp);
 PERL_CALLCONV bool	Perl_do_open9(pTHX_ GV *gv, char *name, I32 len, int as_raw, int rawmode, int rawperm, PerlIO *supplied_fp, SV *svs, I32 num);
@@ -191,8 +314,12 @@ PERL_CALLCONV void	Perl_do_sprintf(pTHX_ SV* sv, I32 len, SV** sarg);
 PERL_CALLCONV Off_t	Perl_do_sysseek(pTHX_ GV* gv, Off_t pos, int whence);
 PERL_CALLCONV Off_t	Perl_do_tell(pTHX_ GV* gv);
 PERL_CALLCONV I32	Perl_do_trans(pTHX_ SV* sv);
-PERL_CALLCONV UV	Perl_do_vecget(pTHX_ SV* sv, I32 offset, I32 size);
-PERL_CALLCONV void	Perl_do_vecset(pTHX_ SV* sv);
+PERL_CALLCONV UV	Perl_do_vecget(pTHX_ SV* sv, I32 offset, I32 size)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV void	Perl_do_vecset(pTHX_ SV* sv)
+			__attribute__nonnull__(pTHX_1);
+
 PERL_CALLCONV void	Perl_do_vop(pTHX_ I32 optype, SV* sv, SV* left, SV* right);
 PERL_CALLCONV OP*	Perl_dofile(pTHX_ OP* term);
 PERL_CALLCONV I32	Perl_dowantarray(pTHX);
@@ -206,14 +333,21 @@ PERL_CALLCONV void	Perl_gv_dump(pTHX_ GV* gv);
 PERL_CALLCONV void	Perl_op_dump(pTHX_ const OP* arg);
 PERL_CALLCONV void	Perl_pmop_dump(pTHX_ PMOP* pm);
 PERL_CALLCONV void	Perl_dump_packsubs(pTHX_ const HV* stash);
-PERL_CALLCONV void	Perl_dump_sub(pTHX_ const GV* gv);
+PERL_CALLCONV void	Perl_dump_sub(pTHX_ const GV* gv)
+			__attribute__nonnull__(pTHX_1);
+
 PERL_CALLCONV void	Perl_fbm_compile(pTHX_ SV* sv, U32 flags);
 PERL_CALLCONV char*	Perl_fbm_instr(pTHX_ unsigned char* big, unsigned char* bigend, SV* littlesv, U32 flags);
 PERL_CALLCONV char*	Perl_find_script(pTHX_ const char *scriptname, bool dosearch, const char **search_ext, I32 flags);
-PERL_CALLCONV OP*	Perl_force_list(pTHX_ OP* arg);
-PERL_CALLCONV OP*	Perl_fold_constants(pTHX_ OP* arg);
+PERL_CALLCONV OP*	Perl_force_list(pTHX_ OP* arg)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV OP*	Perl_fold_constants(pTHX_ OP* arg)
+			__attribute__nonnull__(pTHX_1);
+
 PERL_CALLCONV char*	Perl_form(pTHX_ const char* pat, ...)
-	__attribute__format__(__printf__,pTHX_1,pTHX_2);
+			__attribute__format__(__printf__,pTHX_1,pTHX_2);
+
 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);
@@ -228,7 +362,7 @@ 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 void	Perl_gv_check(pTHX_ HV* stash);
 PERL_CALLCONV void	Perl_gv_efullname(pTHX_ SV* sv, const GV* gv);
-/* PERL_CALLCONV void	gv_efullname3(pTHX_ SV* sv, const GV* gv, const char* prefix); */
+/* 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_fetchmeth(pTHX_ HV* stash, const char* name, STRLEN len, I32 level);
@@ -237,7 +371,7 @@ PERL_CALLCONV GV*	Perl_gv_fetchmethod(pTHX_ HV* stash, const char* name);
 PERL_CALLCONV GV*	Perl_gv_fetchmethod_autoload(pTHX_ HV* stash, const char* name, I32 autoload);
 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	gv_fullname3(pTHX_ SV* sv, const GV* gv, const char* prefix); */
+/* 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 HV*	Perl_gv_stashpv(pTHX_ const char* name, I32 create);
@@ -251,90 +385,290 @@ 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 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);
-PERL_CALLCONV I32	Perl_hv_iterinit(pTHX_ HV* tb);
-PERL_CALLCONV char*	Perl_hv_iterkey(pTHX_ HE* entry, I32* retlen);
-PERL_CALLCONV SV*	Perl_hv_iterkeysv(pTHX_ HE* entry);
-PERL_CALLCONV HE*	Perl_hv_iternext(pTHX_ HV* tb);
-PERL_CALLCONV SV*	Perl_hv_iternextsv(pTHX_ HV* hv, char** key, I32* retlen);
-PERL_CALLCONV HE*	Perl_hv_iternext_flags(pTHX_ HV* tb, I32 flags);
-PERL_CALLCONV SV*	Perl_hv_iterval(pTHX_ HV* tb, HE* entry);
-PERL_CALLCONV void	Perl_hv_ksplit(pTHX_ HV* hv, IV newmax);
+PERL_CALLCONV void	Perl_hv_free_ent(pTHX_ HV* hv, HE* entry)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV I32	Perl_hv_iterinit(pTHX_ HV* tb)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV char*	Perl_hv_iterkey(pTHX_ HE* entry, I32* retlen)
+			__attribute__warn_unused_result__
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2);
+
+PERL_CALLCONV SV*	Perl_hv_iterkeysv(pTHX_ HE* entry)
+			__attribute__warn_unused_result__
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV HE*	Perl_hv_iternext(pTHX_ HV* tb)
+			__attribute__warn_unused_result__
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV SV*	Perl_hv_iternextsv(pTHX_ HV* hv, char** key, I32* retlen)
+			__attribute__warn_unused_result__
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2)
+			__attribute__nonnull__(pTHX_3);
+
+PERL_CALLCONV HE*	Perl_hv_iternext_flags(pTHX_ HV* tb, I32 flags)
+			__attribute__warn_unused_result__
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV SV*	Perl_hv_iterval(pTHX_ HV* tb, HE* entry)
+			__attribute__warn_unused_result__
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2);
+
+PERL_CALLCONV void	Perl_hv_ksplit(pTHX_ HV* hv, IV newmax)
+			__attribute__nonnull__(pTHX_1);
+
 PERL_CALLCONV void	Perl_hv_magic(pTHX_ HV* hv, GV* gv, int how);
 PERL_CALLCONV SV**	Perl_hv_store(pTHX_ HV* tb, const char* key, I32 klen, SV* val, U32 hash);
 PERL_CALLCONV HE*	Perl_hv_store_ent(pTHX_ HV* tb, SV* key, SV* val, U32 hash);
 PERL_CALLCONV SV**	Perl_hv_store_flags(pTHX_ HV* tb, const char* key, I32 klen, SV* val, U32 hash, int flags);
 PERL_CALLCONV void	Perl_hv_undef(pTHX_ HV* tb);
-PERL_CALLCONV I32	Perl_ibcmp(pTHX_ const char* a, const char* b, I32 len);
-PERL_CALLCONV I32	Perl_ibcmp_locale(pTHX_ const char* a, const char* b, I32 len);
-PERL_CALLCONV I32	Perl_ibcmp_utf8(pTHX_ const char* a, char **pe1, UV l1, bool u1, const char* b, char **pe2, UV l2, bool u2);
-PERL_CALLCONV bool	Perl_ingroup(pTHX_ Gid_t testgid, Uid_t effective);
-PERL_CALLCONV void	Perl_init_argv_symbols(pTHX_ int argc, char **argv);
+PERL_CALLCONV I32	Perl_ibcmp(pTHX_ const char* a, const char* b, I32 len)
+			__attribute__pure__
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2);
+
+PERL_CALLCONV I32	Perl_ibcmp_locale(pTHX_ const char* a, const char* b, I32 len)
+			__attribute__pure__
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2);
+
+PERL_CALLCONV I32	Perl_ibcmp_utf8(pTHX_ const char* a, char **pe1, UV l1, bool u1, const char* b, char **pe2, UV l2, bool u2)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_5);
+
+PERL_CALLCONV bool	Perl_ingroup(pTHX_ Gid_t testgid, Uid_t effective)
+			__attribute__warn_unused_result__;
+
+PERL_CALLCONV void	Perl_init_argv_symbols(pTHX_ int argc, char **argv)
+			__attribute__nonnull__(pTHX_2);
+
 PERL_CALLCONV void	Perl_init_debugger(pTHX);
 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);
+PERL_CALLCONV char*	Perl_instr(pTHX_ const char* big, const char* little)
+			__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 I32	Perl_is_lvalue_sub(pTHX);
-PERL_CALLCONV U32	Perl_to_uni_upper_lc(pTHX_ U32 c);
-PERL_CALLCONV U32	Perl_to_uni_title_lc(pTHX_ U32 c);
-PERL_CALLCONV U32	Perl_to_uni_lower_lc(pTHX_ U32 c);
-PERL_CALLCONV bool	Perl_is_uni_alnum(pTHX_ UV c);
-PERL_CALLCONV bool	Perl_is_uni_alnumc(pTHX_ UV c);
-PERL_CALLCONV bool	Perl_is_uni_idfirst(pTHX_ UV c);
-PERL_CALLCONV bool	Perl_is_uni_alpha(pTHX_ UV c);
-PERL_CALLCONV bool	Perl_is_uni_ascii(pTHX_ UV c);
-PERL_CALLCONV bool	Perl_is_uni_space(pTHX_ UV c);
-PERL_CALLCONV bool	Perl_is_uni_cntrl(pTHX_ UV c);
-PERL_CALLCONV bool	Perl_is_uni_graph(pTHX_ UV c);
-PERL_CALLCONV bool	Perl_is_uni_digit(pTHX_ UV c);
-PERL_CALLCONV bool	Perl_is_uni_upper(pTHX_ UV c);
-PERL_CALLCONV bool	Perl_is_uni_lower(pTHX_ UV c);
-PERL_CALLCONV bool	Perl_is_uni_print(pTHX_ UV c);
-PERL_CALLCONV bool	Perl_is_uni_punct(pTHX_ UV c);
-PERL_CALLCONV bool	Perl_is_uni_xdigit(pTHX_ UV c);
-PERL_CALLCONV UV	Perl_to_uni_upper(pTHX_ UV c, U8 *p, STRLEN *lenp);
-PERL_CALLCONV UV	Perl_to_uni_title(pTHX_ UV c, U8 *p, STRLEN *lenp);
-PERL_CALLCONV UV	Perl_to_uni_lower(pTHX_ UV c, U8 *p, STRLEN *lenp);
-PERL_CALLCONV UV	Perl_to_uni_fold(pTHX_ UV c, U8 *p, STRLEN *lenp);
-PERL_CALLCONV bool	Perl_is_uni_alnum_lc(pTHX_ UV c);
-PERL_CALLCONV bool	Perl_is_uni_alnumc_lc(pTHX_ UV c);
-PERL_CALLCONV bool	Perl_is_uni_idfirst_lc(pTHX_ UV c);
-PERL_CALLCONV bool	Perl_is_uni_alpha_lc(pTHX_ UV c);
-PERL_CALLCONV bool	Perl_is_uni_ascii_lc(pTHX_ UV c);
-PERL_CALLCONV bool	Perl_is_uni_space_lc(pTHX_ UV c);
-PERL_CALLCONV bool	Perl_is_uni_cntrl_lc(pTHX_ UV c);
-PERL_CALLCONV bool	Perl_is_uni_graph_lc(pTHX_ UV c);
-PERL_CALLCONV bool	Perl_is_uni_digit_lc(pTHX_ UV c);
-PERL_CALLCONV bool	Perl_is_uni_upper_lc(pTHX_ UV c);
-PERL_CALLCONV bool	Perl_is_uni_lower_lc(pTHX_ UV c);
-PERL_CALLCONV bool	Perl_is_uni_print_lc(pTHX_ UV c);
-PERL_CALLCONV bool	Perl_is_uni_punct_lc(pTHX_ UV c);
-PERL_CALLCONV bool	Perl_is_uni_xdigit_lc(pTHX_ UV c);
-PERL_CALLCONV STRLEN	Perl_is_utf8_char(pTHX_ const U8 *p);
-PERL_CALLCONV bool	Perl_is_utf8_string(pTHX_ const U8 *s, STRLEN len);
-PERL_CALLCONV bool	Perl_is_utf8_string_loc(pTHX_ const U8 *s, STRLEN len, const U8 **p);
-PERL_CALLCONV bool	Perl_is_utf8_alnum(pTHX_ const U8 *p);
-PERL_CALLCONV bool	Perl_is_utf8_alnumc(pTHX_ const U8 *p);
-PERL_CALLCONV bool	Perl_is_utf8_idfirst(pTHX_ const U8 *p);
-PERL_CALLCONV bool	Perl_is_utf8_idcont(pTHX_ const U8 *p);
-PERL_CALLCONV bool	Perl_is_utf8_alpha(pTHX_ const U8 *p);
-PERL_CALLCONV bool	Perl_is_utf8_ascii(pTHX_ const U8 *p);
-PERL_CALLCONV bool	Perl_is_utf8_space(pTHX_ const U8 *p);
-PERL_CALLCONV bool	Perl_is_utf8_cntrl(pTHX_ const U8 *p);
-PERL_CALLCONV bool	Perl_is_utf8_digit(pTHX_ const U8 *p);
-PERL_CALLCONV bool	Perl_is_utf8_graph(pTHX_ const U8 *p);
-PERL_CALLCONV bool	Perl_is_utf8_upper(pTHX_ const U8 *p);
-PERL_CALLCONV bool	Perl_is_utf8_lower(pTHX_ const U8 *p);
-PERL_CALLCONV bool	Perl_is_utf8_print(pTHX_ const U8 *p);
-PERL_CALLCONV bool	Perl_is_utf8_punct(pTHX_ const U8 *p);
-PERL_CALLCONV bool	Perl_is_utf8_xdigit(pTHX_ const U8 *p);
-PERL_CALLCONV bool	Perl_is_utf8_mark(pTHX_ const U8 *p);
-PERL_CALLCONV OP*	Perl_jmaybe(pTHX_ OP* arg);
-PERL_CALLCONV I32	Perl_keyword(pTHX_ char* d, I32 len);
+PERL_CALLCONV bool	Perl_is_gv_magical(pTHX_ const char *name, STRLEN len, U32 flags)
+			__attribute__warn_unused_result__;
+
+PERL_CALLCONV I32	Perl_is_lvalue_sub(pTHX)
+			__attribute__warn_unused_result__;
+
+PERL_CALLCONV U32	Perl_to_uni_upper_lc(pTHX_ U32 c)
+			__attribute__warn_unused_result__
+			__attribute__pure__;
+
+PERL_CALLCONV U32	Perl_to_uni_title_lc(pTHX_ U32 c)
+			__attribute__warn_unused_result__
+			__attribute__pure__;
+
+PERL_CALLCONV U32	Perl_to_uni_lower_lc(pTHX_ U32 c)
+			__attribute__warn_unused_result__
+			__attribute__pure__;
+
+PERL_CALLCONV bool	Perl_is_uni_alnum(pTHX_ UV c)
+			__attribute__warn_unused_result__
+			__attribute__pure__;
+
+PERL_CALLCONV bool	Perl_is_uni_alnumc(pTHX_ UV c)
+			__attribute__warn_unused_result__
+			__attribute__pure__;
+
+PERL_CALLCONV bool	Perl_is_uni_idfirst(pTHX_ UV c)
+			__attribute__warn_unused_result__
+			__attribute__pure__;
+
+PERL_CALLCONV bool	Perl_is_uni_alpha(pTHX_ UV c)
+			__attribute__warn_unused_result__
+			__attribute__pure__;
+
+PERL_CALLCONV bool	Perl_is_uni_ascii(pTHX_ UV c)
+			__attribute__warn_unused_result__
+			__attribute__pure__;
+
+PERL_CALLCONV bool	Perl_is_uni_space(pTHX_ UV c)
+			__attribute__warn_unused_result__
+			__attribute__pure__;
+
+PERL_CALLCONV bool	Perl_is_uni_cntrl(pTHX_ UV c)
+			__attribute__warn_unused_result__
+			__attribute__pure__;
+
+PERL_CALLCONV bool	Perl_is_uni_graph(pTHX_ UV c)
+			__attribute__warn_unused_result__
+			__attribute__pure__;
+
+PERL_CALLCONV bool	Perl_is_uni_digit(pTHX_ UV c)
+			__attribute__warn_unused_result__
+			__attribute__pure__;
+
+PERL_CALLCONV bool	Perl_is_uni_upper(pTHX_ UV c)
+			__attribute__warn_unused_result__
+			__attribute__pure__;
+
+PERL_CALLCONV bool	Perl_is_uni_lower(pTHX_ UV c)
+			__attribute__warn_unused_result__
+			__attribute__pure__;
+
+PERL_CALLCONV bool	Perl_is_uni_print(pTHX_ UV c)
+			__attribute__warn_unused_result__
+			__attribute__pure__;
+
+PERL_CALLCONV bool	Perl_is_uni_punct(pTHX_ UV c)
+			__attribute__warn_unused_result__
+			__attribute__pure__;
+
+PERL_CALLCONV bool	Perl_is_uni_xdigit(pTHX_ UV c)
+			__attribute__warn_unused_result__
+			__attribute__pure__;
+
+PERL_CALLCONV UV	Perl_to_uni_upper(pTHX_ UV c, U8 *p, STRLEN *lenp)
+			__attribute__nonnull__(pTHX_2)
+			__attribute__nonnull__(pTHX_3);
+
+PERL_CALLCONV UV	Perl_to_uni_title(pTHX_ UV c, U8 *p, STRLEN *lenp)
+			__attribute__nonnull__(pTHX_2)
+			__attribute__nonnull__(pTHX_3);
+
+PERL_CALLCONV UV	Perl_to_uni_lower(pTHX_ UV c, U8 *p, STRLEN *lenp)
+			__attribute__nonnull__(pTHX_2)
+			__attribute__nonnull__(pTHX_3);
+
+PERL_CALLCONV UV	Perl_to_uni_fold(pTHX_ UV c, U8 *p, STRLEN *lenp)
+			__attribute__nonnull__(pTHX_2)
+			__attribute__nonnull__(pTHX_3);
+
+PERL_CALLCONV bool	Perl_is_uni_alnum_lc(pTHX_ UV c)
+			__attribute__warn_unused_result__
+			__attribute__pure__;
+
+PERL_CALLCONV bool	Perl_is_uni_alnumc_lc(pTHX_ UV c)
+			__attribute__warn_unused_result__
+			__attribute__pure__;
+
+PERL_CALLCONV bool	Perl_is_uni_idfirst_lc(pTHX_ UV c)
+			__attribute__warn_unused_result__
+			__attribute__pure__;
+
+PERL_CALLCONV bool	Perl_is_uni_alpha_lc(pTHX_ UV c)
+			__attribute__warn_unused_result__
+			__attribute__pure__;
+
+PERL_CALLCONV bool	Perl_is_uni_ascii_lc(pTHX_ UV c)
+			__attribute__warn_unused_result__
+			__attribute__pure__;
+
+PERL_CALLCONV bool	Perl_is_uni_space_lc(pTHX_ UV c)
+			__attribute__warn_unused_result__
+			__attribute__pure__;
+
+PERL_CALLCONV bool	Perl_is_uni_cntrl_lc(pTHX_ UV c)
+			__attribute__warn_unused_result__
+			__attribute__pure__;
+
+PERL_CALLCONV bool	Perl_is_uni_graph_lc(pTHX_ UV c)
+			__attribute__warn_unused_result__
+			__attribute__pure__;
+
+PERL_CALLCONV bool	Perl_is_uni_digit_lc(pTHX_ UV c)
+			__attribute__warn_unused_result__
+			__attribute__pure__;
+
+PERL_CALLCONV bool	Perl_is_uni_upper_lc(pTHX_ UV c)
+			__attribute__warn_unused_result__
+			__attribute__pure__;
+
+PERL_CALLCONV bool	Perl_is_uni_lower_lc(pTHX_ UV c)
+			__attribute__warn_unused_result__
+			__attribute__pure__;
+
+PERL_CALLCONV bool	Perl_is_uni_print_lc(pTHX_ UV c)
+			__attribute__warn_unused_result__
+			__attribute__pure__;
+
+PERL_CALLCONV bool	Perl_is_uni_punct_lc(pTHX_ UV c)
+			__attribute__warn_unused_result__
+			__attribute__pure__;
+
+PERL_CALLCONV bool	Perl_is_uni_xdigit_lc(pTHX_ UV c)
+			__attribute__warn_unused_result__
+			__attribute__pure__;
+
+PERL_CALLCONV STRLEN	Perl_is_utf8_char(pTHX_ const U8 *p)
+			__attribute__nonnull__(pTHX_1);
+
+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);
+
+PERL_CALLCONV bool	Perl_is_utf8_alnum(pTHX_ const U8 *p)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV bool	Perl_is_utf8_alnumc(pTHX_ const U8 *p)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV bool	Perl_is_utf8_idfirst(pTHX_ const U8 *p)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV bool	Perl_is_utf8_idcont(pTHX_ const U8 *p)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV bool	Perl_is_utf8_alpha(pTHX_ const U8 *p)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV bool	Perl_is_utf8_ascii(pTHX_ const U8 *p)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV bool	Perl_is_utf8_space(pTHX_ const U8 *p)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV bool	Perl_is_utf8_cntrl(pTHX_ const U8 *p)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV bool	Perl_is_utf8_digit(pTHX_ const U8 *p)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV bool	Perl_is_utf8_graph(pTHX_ const U8 *p)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV bool	Perl_is_utf8_upper(pTHX_ const U8 *p)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV bool	Perl_is_utf8_lower(pTHX_ const U8 *p)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV bool	Perl_is_utf8_print(pTHX_ const U8 *p)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV bool	Perl_is_utf8_punct(pTHX_ const U8 *p)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV bool	Perl_is_utf8_xdigit(pTHX_ const U8 *p)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV bool	Perl_is_utf8_mark(pTHX_ const U8 *p)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV OP*	Perl_jmaybe(pTHX_ OP* arg)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV I32	Perl_keyword(pTHX_ const char* d, I32 len)
+			__attribute__pure__
+			__attribute__nonnull__(pTHX_1);
+
 PERL_CALLCONV void	Perl_leave_scope(pTHX_ I32 base);
 PERL_CALLCONV void	Perl_lex_end(pTHX);
 PERL_CALLCONV void	Perl_lex_start(pTHX_ SV* line);
@@ -348,12 +682,25 @@ PERL_CALLCONV OP*	Perl_listkids(pTHX_ OP* o);
 PERL_CALLCONV void	Perl_load_module(pTHX_ U32 flags, SV* name, SV* ver, ...);
 PERL_CALLCONV void	Perl_vload_module(pTHX_ U32 flags, SV* name, SV* ver, va_list* args);
 PERL_CALLCONV OP*	Perl_localize(pTHX_ OP* arg, I32 lexical);
-PERL_CALLCONV I32	Perl_looks_like_number(pTHX_ SV* sv);
-PERL_CALLCONV UV	Perl_grok_bin(pTHX_ const char* start, STRLEN* len, I32* flags, NV *result);
-PERL_CALLCONV UV	Perl_grok_hex(pTHX_ const char* start, STRLEN* len, I32* flags, NV *result);
-PERL_CALLCONV int	Perl_grok_number(pTHX_ const char *pv, STRLEN len, UV *valuep);
+PERL_CALLCONV I32	Perl_looks_like_number(pTHX_ SV* sv)
+			__attribute__warn_unused_result__
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV UV	Perl_grok_bin(pTHX_ const char* start, STRLEN* len_p, I32* flags, NV *result)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2)
+			__attribute__nonnull__(pTHX_3);
+
+PERL_CALLCONV UV	Perl_grok_hex(pTHX_ const char* start, STRLEN* len_p, I32* flags, NV *result)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2)
+			__attribute__nonnull__(pTHX_3);
+
+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 UV	Perl_grok_oct(pTHX_ const char* start, STRLEN* len, I32* flags, NV *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);
 PERL_CALLCONV int	Perl_magic_clearpack(pTHX_ SV* sv, MAGIC* mg);
@@ -377,7 +724,9 @@ PERL_CALLCONV U32	Perl_magic_len(pTHX_ SV* sv, MAGIC* mg);
 PERL_CALLCONV int	Perl_magic_nextpack(pTHX_ SV* sv, MAGIC* mg, SV* key);
 PERL_CALLCONV U32	Perl_magic_regdata_cnt(pTHX_ SV* sv, MAGIC* mg);
 PERL_CALLCONV int	Perl_magic_regdatum_get(pTHX_ SV* sv, MAGIC* mg);
-PERL_CALLCONV int	Perl_magic_regdatum_set(pTHX_ SV* sv, MAGIC* mg) __attribute__((noreturn));
+PERL_CALLCONV int	Perl_magic_regdatum_set(pTHX_ SV* sv, MAGIC* mg)
+			__attribute__noreturn__;
+
 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);
@@ -411,7 +760,8 @@ PERL_CALLCONV void	Perl_markstack_grow(pTHX);
 PERL_CALLCONV char*	Perl_mem_collxfrm(pTHX_ const char* s, STRLEN len, STRLEN* xlen);
 #endif
 PERL_CALLCONV SV*	Perl_mess(pTHX_ const char* pat, ...)
-	__attribute__format__(__printf__,pTHX_1,pTHX_2);
+			__attribute__format__(__printf__,pTHX_1,pTHX_2);
+
 PERL_CALLCONV SV*	Perl_vmess(pTHX_ const char* pat, va_list* args);
 PERL_CALLCONV void	Perl_qerror(pTHX_ SV* err);
 PERL_CALLCONV void	Perl_sortsv(pTHX_ SV ** array, size_t num_elts, SVCOMPARE_t cmp);
@@ -428,26 +778,45 @@ PERL_CALLCONV void	Perl_mini_mktime(pTHX_ struct tm *pm);
 PERL_CALLCONV OP*	Perl_mod(pTHX_ OP* o, I32 type);
 PERL_CALLCONV int	Perl_mode_from_discipline(pTHX_ SV* discp);
 PERL_CALLCONV char*	Perl_moreswitches(pTHX_ char* s);
-PERL_CALLCONV OP*	Perl_my(pTHX_ OP* o);
-PERL_CALLCONV NV	Perl_my_atof(pTHX_ const char *s);
+PERL_CALLCONV OP*	Perl_my(pTHX_ OP* o)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV NV	Perl_my_atof(pTHX_ const char *s)
+			__attribute__nonnull__(pTHX_1);
+
 #if (!defined(HAS_MEMCPY) && !defined(HAS_BCOPY)) || (!defined(HAS_MEMMOVE) && !defined(HAS_SAFE_MEMCPY) && !defined(HAS_SAFE_BCOPY))
-PERL_CALLCONV char*	Perl_my_bcopy(const char* from, char* to, I32 len);
+PERL_CALLCONV char*	Perl_my_bcopy(const char* from, char* to, I32 len)
+			__attribute__nonnull__(1)
+			__attribute__nonnull__(2);
+
 #endif
 #if !defined(HAS_BZERO) && !defined(HAS_MEMSET)
-PERL_CALLCONV char*	Perl_my_bzero(char* loc, I32 len);
+PERL_CALLCONV char*	Perl_my_bzero(char* loc, I32 len)
+			__attribute__nonnull__(1);
+
 #endif
-PERL_CALLCONV void	Perl_my_exit(pTHX_ U32 status) __attribute__((noreturn));
-PERL_CALLCONV void	Perl_my_failure_exit(pTHX) __attribute__((noreturn));
+PERL_CALLCONV void	Perl_my_exit(pTHX_ U32 status)
+			__attribute__noreturn__;
+
+PERL_CALLCONV void	Perl_my_failure_exit(pTHX)
+			__attribute__noreturn__;
+
 PERL_CALLCONV I32	Perl_my_fflush_all(pTHX);
 PERL_CALLCONV Pid_t	Perl_my_fork(void);
 PERL_CALLCONV void	Perl_atfork_lock(void);
 PERL_CALLCONV void	Perl_atfork_unlock(void);
 PERL_CALLCONV I32	Perl_my_lstat(pTHX);
 #if !defined(HAS_MEMCMP) || !defined(HAS_SANE_MEMCMP)
-PERL_CALLCONV I32	Perl_my_memcmp(const char* s1, const char* s2, I32 len);
+PERL_CALLCONV I32	Perl_my_memcmp(const char* s1, const char* s2, I32 len)
+			__attribute__pure__
+			__attribute__nonnull__(1)
+			__attribute__nonnull__(2);
+
 #endif
 #if !defined(HAS_MEMSET)
-PERL_CALLCONV void*	Perl_my_memset(char* loc, I32 ch, I32 len);
+PERL_CALLCONV void*	Perl_my_memset(char* loc, I32 ch, I32 len)
+			__attribute__nonnull__(1);
+
 #endif
 PERL_CALLCONV I32	Perl_my_pclose(pTHX_ PerlIO* ptr);
 PERL_CALLCONV PerlIO*	Perl_my_popen(pTHX_ char* cmd, char* mode);
@@ -456,84 +825,261 @@ PERL_CALLCONV void	Perl_my_setenv(pTHX_ const char* nam, const char* val);
 PERL_CALLCONV I32	Perl_my_stat(pTHX);
 PERL_CALLCONV char *	Perl_my_strftime(pTHX_ const char *fmt, int sec, int min, int hour, int mday, int mon, int year, int wday, int yday, int isdst);
 #if defined(MYSWAP)
-PERL_CALLCONV short	Perl_my_swap(pTHX_ short s);
-PERL_CALLCONV long	Perl_my_htonl(pTHX_ long l);
-PERL_CALLCONV long	Perl_my_ntohl(pTHX_ long l);
+PERL_CALLCONV short	Perl_my_swap(pTHX_ short s)
+			__attribute__malloc__
+			__attribute__warn_unused_result__
+			__attribute__pure__;
+
+PERL_CALLCONV long	Perl_my_htonl(pTHX_ long l)
+			__attribute__malloc__
+			__attribute__warn_unused_result__
+			__attribute__pure__;
+
+PERL_CALLCONV long	Perl_my_ntohl(pTHX_ long l)
+			__attribute__malloc__
+			__attribute__warn_unused_result__
+			__attribute__pure__;
+
 #endif
 PERL_CALLCONV void	Perl_my_unexec(pTHX);
-PERL_CALLCONV OP*	Perl_newANONLIST(pTHX_ OP* o);
-PERL_CALLCONV OP*	Perl_newANONHASH(pTHX_ OP* o);
+PERL_CALLCONV OP*	Perl_newANONLIST(pTHX_ OP* o)
+			__attribute__malloc__
+			__attribute__warn_unused_result__;
+
+PERL_CALLCONV OP*	Perl_newANONHASH(pTHX_ OP* o)
+			__attribute__malloc__
+			__attribute__warn_unused_result__;
+
 PERL_CALLCONV OP*	Perl_newANONSUB(pTHX_ I32 floor, OP* proto, OP* block);
-PERL_CALLCONV OP*	Perl_newASSIGNOP(pTHX_ I32 flags, OP* left, I32 optype, OP* right);
-PERL_CALLCONV OP*	Perl_newCONDOP(pTHX_ I32 flags, OP* expr, OP* trueop, OP* falseop);
+PERL_CALLCONV OP*	Perl_newASSIGNOP(pTHX_ I32 flags, OP* left, I32 optype, OP* right)
+			__attribute__malloc__
+			__attribute__warn_unused_result__;
+
+PERL_CALLCONV OP*	Perl_newCONDOP(pTHX_ I32 flags, OP* expr, OP* trueop, OP* falseop)
+			__attribute__malloc__
+			__attribute__warn_unused_result__;
+
 PERL_CALLCONV CV*	Perl_newCONSTSUB(pTHX_ HV* stash, const char* name, SV* sv);
 PERL_CALLCONV void	Perl_newFORM(pTHX_ I32 floor, OP* o, OP* block);
-PERL_CALLCONV OP*	Perl_newFOROP(pTHX_ I32 flags, char* label, line_t forline, OP* sclr, OP* expr, OP*block, OP*cont);
-PERL_CALLCONV OP*	Perl_newLOGOP(pTHX_ I32 optype, I32 flags, OP* left, OP* right);
-PERL_CALLCONV OP*	Perl_newLOOPEX(pTHX_ I32 type, OP* label);
-PERL_CALLCONV OP*	Perl_newLOOPOP(pTHX_ I32 flags, I32 debuggable, OP* expr, OP* block);
-PERL_CALLCONV OP*	Perl_newNULLLIST(pTHX);
-PERL_CALLCONV OP*	Perl_newOP(pTHX_ I32 optype, I32 flags);
-PERL_CALLCONV void	Perl_newPROG(pTHX_ OP* o);
-PERL_CALLCONV OP*	Perl_newRANGE(pTHX_ I32 flags, OP* left, OP* right);
-PERL_CALLCONV OP*	Perl_newSLICEOP(pTHX_ I32 flags, OP* subscript, OP* listop);
-PERL_CALLCONV OP*	Perl_newSTATEOP(pTHX_ I32 flags, char* label, OP* o);
+PERL_CALLCONV OP*	Perl_newFOROP(pTHX_ I32 flags, char* label, line_t forline, OP* sclr, OP* expr, OP*block, OP*cont)
+			__attribute__malloc__
+			__attribute__warn_unused_result__;
+
+PERL_CALLCONV OP*	Perl_newLOGOP(pTHX_ I32 optype, I32 flags, OP* left, OP* right)
+			__attribute__malloc__
+			__attribute__warn_unused_result__;
+
+PERL_CALLCONV OP*	Perl_newLOOPEX(pTHX_ I32 type, OP* label)
+			__attribute__malloc__
+			__attribute__warn_unused_result__;
+
+PERL_CALLCONV OP*	Perl_newLOOPOP(pTHX_ I32 flags, I32 debuggable, OP* expr, OP* block)
+			__attribute__malloc__
+			__attribute__warn_unused_result__;
+
+PERL_CALLCONV OP*	Perl_newNULLLIST(pTHX)
+			__attribute__malloc__
+			__attribute__warn_unused_result__;
+
+PERL_CALLCONV OP*	Perl_newOP(pTHX_ I32 optype, I32 flags)
+			__attribute__malloc__
+			__attribute__warn_unused_result__;
+
+PERL_CALLCONV void	Perl_newPROG(pTHX_ OP* o)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV OP*	Perl_newRANGE(pTHX_ I32 flags, OP* left, OP* right)
+			__attribute__malloc__
+			__attribute__warn_unused_result__;
+
+PERL_CALLCONV OP*	Perl_newSLICEOP(pTHX_ I32 flags, OP* subscript, OP* listop)
+			__attribute__malloc__
+			__attribute__warn_unused_result__;
+
+PERL_CALLCONV OP*	Perl_newSTATEOP(pTHX_ I32 flags, char* label, OP* o)
+			__attribute__malloc__
+			__attribute__warn_unused_result__;
+
 PERL_CALLCONV CV*	Perl_newSUB(pTHX_ I32 floor, OP* o, OP* proto, OP* block);
-PERL_CALLCONV CV*	Perl_newXS(pTHX_ const char* name, XSUBADDR_t f, const char* filename);
-PERL_CALLCONV AV*	Perl_newAV(pTHX);
-PERL_CALLCONV OP*	Perl_newAVREF(pTHX_ OP* o);
-PERL_CALLCONV OP*	Perl_newBINOP(pTHX_ I32 type, I32 flags, OP* first, OP* last);
-PERL_CALLCONV OP*	Perl_newCVREF(pTHX_ I32 flags, OP* o);
-PERL_CALLCONV OP*	Perl_newGVOP(pTHX_ I32 type, I32 flags, GV* gv);
-PERL_CALLCONV GV*	Perl_newGVgen(pTHX_ const char* pack);
-PERL_CALLCONV OP*	Perl_newGVREF(pTHX_ I32 type, OP* o);
-PERL_CALLCONV OP*	Perl_newHVREF(pTHX_ OP* o);
-PERL_CALLCONV HV*	Perl_newHV(pTHX);
-PERL_CALLCONV HV*	Perl_newHVhv(pTHX_ HV* hv);
-PERL_CALLCONV IO*	Perl_newIO(pTHX);
-PERL_CALLCONV OP*	Perl_newLISTOP(pTHX_ I32 type, I32 flags, OP* first, OP* last);
-PERL_CALLCONV OP*	Perl_newPADOP(pTHX_ I32 type, I32 flags, SV* sv);
-PERL_CALLCONV OP*	Perl_newPMOP(pTHX_ I32 type, I32 flags);
-PERL_CALLCONV OP*	Perl_newPVOP(pTHX_ I32 type, I32 flags, char* pv);
-PERL_CALLCONV SV*	Perl_newRV(pTHX_ SV* pref);
-PERL_CALLCONV SV*	Perl_newRV_noinc(pTHX_ SV *sv);
-PERL_CALLCONV SV*	Perl_newSV(pTHX_ STRLEN len);
-PERL_CALLCONV OP*	Perl_newSVREF(pTHX_ OP* o);
-PERL_CALLCONV OP*	Perl_newSVOP(pTHX_ I32 type, I32 flags, SV* sv);
-PERL_CALLCONV SV*	Perl_newSViv(pTHX_ IV i);
-PERL_CALLCONV SV*	Perl_newSVuv(pTHX_ UV u);
-PERL_CALLCONV SV*	Perl_newSVnv(pTHX_ NV n);
-PERL_CALLCONV SV*	Perl_newSVpv(pTHX_ const char* s, STRLEN len);
-PERL_CALLCONV SV*	Perl_newSVpvn(pTHX_ const char* s, STRLEN len);
-PERL_CALLCONV SV*	Perl_newSVpvn_share(pTHX_ const char* s, I32 len, U32 hash);
+PERL_CALLCONV CV*	Perl_newXS(pTHX_ const char* name, XSUBADDR_t f, const char* filename)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_3);
+
+PERL_CALLCONV AV*	Perl_newAV(pTHX)
+			__attribute__malloc__
+			__attribute__warn_unused_result__;
+
+PERL_CALLCONV OP*	Perl_newAVREF(pTHX_ OP* o)
+			__attribute__malloc__
+			__attribute__warn_unused_result__
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV OP*	Perl_newBINOP(pTHX_ I32 type, I32 flags, OP* first, OP* last)
+			__attribute__malloc__
+			__attribute__warn_unused_result__;
+
+PERL_CALLCONV OP*	Perl_newCVREF(pTHX_ I32 flags, OP* o)
+			__attribute__malloc__
+			__attribute__warn_unused_result__;
+
+PERL_CALLCONV OP*	Perl_newGVOP(pTHX_ I32 type, I32 flags, GV* gv)
+			__attribute__malloc__
+			__attribute__warn_unused_result__;
+
+PERL_CALLCONV GV*	Perl_newGVgen(pTHX_ const char* pack)
+			__attribute__malloc__
+			__attribute__warn_unused_result__;
+
+PERL_CALLCONV OP*	Perl_newGVREF(pTHX_ I32 type, OP* o)
+			__attribute__malloc__
+			__attribute__warn_unused_result__;
+
+PERL_CALLCONV OP*	Perl_newHVREF(pTHX_ OP* o)
+			__attribute__malloc__
+			__attribute__warn_unused_result__
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV HV*	Perl_newHV(pTHX)
+			__attribute__malloc__
+			__attribute__warn_unused_result__;
+
+PERL_CALLCONV HV*	Perl_newHVhv(pTHX_ HV* hv)
+			__attribute__malloc__
+			__attribute__warn_unused_result__;
+
+PERL_CALLCONV IO*	Perl_newIO(pTHX)
+			__attribute__malloc__
+			__attribute__warn_unused_result__;
+
+PERL_CALLCONV OP*	Perl_newLISTOP(pTHX_ I32 type, I32 flags, OP* first, OP* last)
+			__attribute__malloc__
+			__attribute__warn_unused_result__;
+
+PERL_CALLCONV OP*	Perl_newPADOP(pTHX_ I32 type, I32 flags, SV* sv)
+			__attribute__malloc__
+			__attribute__warn_unused_result__;
+
+PERL_CALLCONV OP*	Perl_newPMOP(pTHX_ I32 type, I32 flags)
+			__attribute__malloc__
+			__attribute__warn_unused_result__;
+
+PERL_CALLCONV OP*	Perl_newPVOP(pTHX_ I32 type, I32 flags, char* pv)
+			__attribute__malloc__
+			__attribute__warn_unused_result__;
+
+PERL_CALLCONV SV*	Perl_newRV(pTHX_ SV* pref)
+			__attribute__malloc__
+			__attribute__warn_unused_result__;
+
+PERL_CALLCONV SV*	Perl_newRV_noinc(pTHX_ SV *sv)
+			__attribute__malloc__
+			__attribute__warn_unused_result__
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV SV*	Perl_newSV(pTHX_ STRLEN len)
+			__attribute__malloc__
+			__attribute__warn_unused_result__;
+
+PERL_CALLCONV OP*	Perl_newSVREF(pTHX_ OP* o)
+			__attribute__malloc__
+			__attribute__warn_unused_result__
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV OP*	Perl_newSVOP(pTHX_ I32 type, I32 flags, SV* sv)
+			__attribute__malloc__
+			__attribute__warn_unused_result__
+			__attribute__nonnull__(pTHX_3);
+
+PERL_CALLCONV SV*	Perl_newSViv(pTHX_ IV i)
+			__attribute__malloc__
+			__attribute__warn_unused_result__;
+
+PERL_CALLCONV SV*	Perl_newSVuv(pTHX_ UV u)
+			__attribute__malloc__
+			__attribute__warn_unused_result__;
+
+PERL_CALLCONV SV*	Perl_newSVnv(pTHX_ NV n)
+			__attribute__malloc__
+			__attribute__warn_unused_result__;
+
+PERL_CALLCONV SV*	Perl_newSVpv(pTHX_ const char* s, STRLEN len)
+			__attribute__malloc__
+			__attribute__warn_unused_result__;
+
+PERL_CALLCONV SV*	Perl_newSVpvn(pTHX_ const char* s, STRLEN len)
+			__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__;
+
 PERL_CALLCONV SV*	Perl_newSVpvf(pTHX_ const char* pat, ...)
-	__attribute__format__(__printf__,pTHX_1,pTHX_2);
+			__attribute__malloc__
+			__attribute__warn_unused_result__
+			__attribute__format__(__printf__,pTHX_1,pTHX_2);
+
 PERL_CALLCONV SV*	Perl_vnewSVpvf(pTHX_ const char* pat, va_list* args);
-PERL_CALLCONV SV*	Perl_newSVrv(pTHX_ SV* rv, const char* classname);
-PERL_CALLCONV SV*	Perl_newSVsv(pTHX_ SV* old);
-PERL_CALLCONV OP*	Perl_newUNOP(pTHX_ I32 type, I32 flags, OP* first);
-PERL_CALLCONV OP*	Perl_newWHILEOP(pTHX_ I32 flags, I32 debuggable, LOOP* loop, I32 whileline, OP* expr, OP* block, OP* cont);
-
-PERL_CALLCONV PERL_SI*	Perl_new_stackinfo(pTHX_ I32 stitems, I32 cxitems);
-PERL_CALLCONV char*	Perl_scan_vstring(pTHX_ const char *vstr, SV *sv);
-PERL_CALLCONV char*	Perl_scan_version(pTHX_ const char *vstr, SV *sv, bool qv);
+PERL_CALLCONV SV*	Perl_newSVrv(pTHX_ SV* rv, const char* classname)
+			__attribute__malloc__
+			__attribute__warn_unused_result__;
+
+PERL_CALLCONV SV*	Perl_newSVsv(pTHX_ SV* old)
+			__attribute__malloc__
+			__attribute__warn_unused_result__;
+
+PERL_CALLCONV OP*	Perl_newUNOP(pTHX_ I32 type, I32 flags, OP* first)
+			__attribute__malloc__
+			__attribute__warn_unused_result__;
+
+PERL_CALLCONV OP*	Perl_newWHILEOP(pTHX_ I32 flags, I32 debuggable, LOOP* loop, I32 whileline, OP* expr, OP* block, OP* cont, I32 has_my)
+			__attribute__malloc__
+			__attribute__warn_unused_result__;
+
+PERL_CALLCONV PERL_SI*	Perl_new_stackinfo(pTHX_ I32 stitems, I32 cxitems)
+			__attribute__malloc__
+			__attribute__warn_unused_result__;
+
+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)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2);
+
 PERL_CALLCONV SV*	Perl_new_version(pTHX_ SV *ver);
 PERL_CALLCONV SV*	Perl_upg_version(pTHX_ SV *ver);
 PERL_CALLCONV SV*	Perl_vnumify(pTHX_ SV *vs);
 PERL_CALLCONV SV*	Perl_vnormal(pTHX_ SV *vs);
 PERL_CALLCONV SV*	Perl_vstringify(pTHX_ SV *vs);
-PERL_CALLCONV int	Perl_vcmp(pTHX_ SV *lvs, SV *rvs);
+PERL_CALLCONV int	Perl_vcmp(pTHX_ SV *lvs, SV *rvs)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2);
+
 PERL_CALLCONV PerlIO*	Perl_nextargv(pTHX_ GV* gv);
-PERL_CALLCONV char*	Perl_ninstr(pTHX_ const char* big, const char* bigend, const char* little, const char* lend);
-PERL_CALLCONV OP*	Perl_oopsCV(pTHX_ OP* o) __attribute__((noreturn));
+PERL_CALLCONV char*	Perl_ninstr(pTHX_ const char* big, const char* bigend, const char* little, const char* lend)
+			__attribute__pure__;
+
+PERL_CALLCONV OP*	Perl_oopsCV(pTHX_ OP* o)
+			__attribute__noreturn__;
+
 PERL_CALLCONV void	Perl_op_free(pTHX_ OP* arg);
 PERL_CALLCONV void	Perl_package(pTHX_ OP* o);
 PERL_CALLCONV PADOFFSET	Perl_pad_alloc(pTHX_ I32 optype, U32 tmptype);
-PERL_CALLCONV PADOFFSET	Perl_allocmy(pTHX_ char* name);
-PERL_CALLCONV PADOFFSET	Perl_pad_findmy(pTHX_ const char* name);
+PERL_CALLCONV PADOFFSET	Perl_allocmy(pTHX_ char* name)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV PADOFFSET	Perl_pad_findmy(pTHX_ const char* name)
+			__attribute__nonnull__(pTHX_1);
+
 PERL_CALLCONV PADOFFSET	Perl_find_rundefsvoffset(pTHX);
-PERL_CALLCONV OP*	Perl_oopsAV(pTHX_ OP* o);
-PERL_CALLCONV OP*	Perl_oopsHV(pTHX_ OP* o);
+PERL_CALLCONV OP*	Perl_oopsAV(pTHX_ OP* o)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV OP*	Perl_oopsHV(pTHX_ OP* o)
+			__attribute__nonnull__(pTHX_1);
+
 PERL_CALLCONV void	Perl_pad_leavemy(pTHX);
 PERL_CALLCONV SV*	Perl_pad_sv(pTHX_ PADOFFSET po);
 PERL_CALLCONV void	Perl_pad_free(pTHX_ PADOFFSET po);
@@ -548,58 +1094,126 @@ PERL_CALLCONV void	Perl_reentrant_free(pTHX);
 PERL_CALLCONV void*	Perl_reentrant_retry(const char*, ...);
 #endif
 PERL_CALLCONV void	Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr);
-PERL_CALLCONV I32	Perl_call_argv(pTHX_ const char* sub_name, I32 flags, char** argv);
-PERL_CALLCONV I32	Perl_call_method(pTHX_ const char* methname, I32 flags);
-PERL_CALLCONV I32	Perl_call_pv(pTHX_ const char* sub_name, I32 flags);
+PERL_CALLCONV I32	Perl_call_argv(pTHX_ const char* sub_name, I32 flags, char** argv)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_3);
+
+PERL_CALLCONV I32	Perl_call_method(pTHX_ const char* methname, I32 flags)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV I32	Perl_call_pv(pTHX_ const char* sub_name, I32 flags)
+			__attribute__nonnull__(pTHX_1);
+
 PERL_CALLCONV I32	Perl_call_sv(pTHX_ SV* sv, I32 flags);
 PERL_CALLCONV void	Perl_despatch_signals(pTHX);
-PERL_CALLCONV SV*	Perl_eval_pv(pTHX_ const char* p, I32 croak_on_error);
-PERL_CALLCONV I32	Perl_eval_sv(pTHX_ SV* sv, I32 flags);
-PERL_CALLCONV SV*	Perl_get_sv(pTHX_ const char* name, I32 create);
-PERL_CALLCONV AV*	Perl_get_av(pTHX_ const char* name, I32 create);
+PERL_CALLCONV SV*	Perl_eval_pv(pTHX_ const char* p, I32 croak_on_error)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV I32	Perl_eval_sv(pTHX_ SV* sv, I32 flags)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV SV*	Perl_get_sv(pTHX_ const char* name, I32 create)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV AV*	Perl_get_av(pTHX_ const char* name, I32 create)
+			__attribute__nonnull__(pTHX_1);
+
 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);
-PERL_CALLCONV void	Perl_new_ctype(pTHX_ char* newctype);
-PERL_CALLCONV void	Perl_new_numeric(pTHX_ char* newcoll);
+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)
+			__attribute__nonnull__(pTHX_1);
+
 PERL_CALLCONV void	Perl_set_numeric_local(pTHX);
 PERL_CALLCONV void	Perl_set_numeric_radix(pTHX);
 PERL_CALLCONV void	Perl_set_numeric_standard(pTHX);
-PERL_CALLCONV void	Perl_require_pv(pTHX_ const char* pv);
-PERL_CALLCONV void	Perl_pack_cat(pTHX_ SV *cat, char *pat, char *patend, SV **beglist, SV **endlist, SV ***next_in_list, U32 flags);
-PERL_CALLCONV void	Perl_packlist(pTHX_ SV *cat, char *pat, char *patend, SV **beglist, SV **endlist);
+PERL_CALLCONV void	Perl_require_pv(pTHX_ const char* pv)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV void	Perl_pack_cat(pTHX_ SV *cat, const char *pat, const char *patend, SV **beglist, SV **endlist, SV ***next_in_list, U32 flags);
+PERL_CALLCONV void	Perl_packlist(pTHX_ SV *cat, const char *pat, const char *patend, SV **beglist, SV **endlist);
 PERL_CALLCONV void	Perl_pidgone(pTHX_ Pid_t pid, int status);
-PERL_CALLCONV void	Perl_pmflag(pTHX_ U32* pmfl, int ch);
-PERL_CALLCONV OP*	Perl_pmruntime(pTHX_ OP* pm, OP* expr, bool isreg);
-PERL_CALLCONV OP*	Perl_pmtrans(pTHX_ OP* o, OP* expr, OP* repl);
+PERL_CALLCONV void	Perl_pmflag(pTHX_ U32* pmfl, int ch)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV OP*	Perl_pmruntime(pTHX_ OP* pm, OP* expr, bool isreg)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2);
+
+PERL_CALLCONV OP*	Perl_pmtrans(pTHX_ OP* o, OP* expr, OP* repl)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2);
+
 PERL_CALLCONV void	Perl_pop_scope(pTHX);
 PERL_CALLCONV OP*	Perl_prepend_elem(pTHX_ I32 optype, OP* head, OP* tail);
 PERL_CALLCONV void	Perl_push_scope(pTHX);
 PERL_CALLCONV OP*	Perl_ref(pTHX_ OP* o, I32 type);
 PERL_CALLCONV OP*	Perl_refkids(pTHX_ OP* o, I32 type);
-PERL_CALLCONV void	Perl_regdump(pTHX_ regexp* r);
-PERL_CALLCONV SV*	Perl_regclass_swash(pTHX_ struct regnode *n, bool doinit, SV **listsvp, SV **altsvp);
-PERL_CALLCONV I32	Perl_pregexec(pTHX_ regexp* prog, char* stringarg, char* strend, char* strbeg, I32 minend, SV* screamer, U32 nosave);
+PERL_CALLCONV void	Perl_regdump(pTHX_ regexp* r)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV SV*	Perl_regclass_swash(pTHX_ const struct regnode *n, bool doinit, SV **listsvp, SV **altsvp);
+PERL_CALLCONV I32	Perl_pregexec(pTHX_ regexp* prog, char* stringarg, char* strend, char* strbeg, I32 minend, SV* screamer, U32 nosave)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2)
+			__attribute__nonnull__(pTHX_3)
+			__attribute__nonnull__(pTHX_4)
+			__attribute__nonnull__(pTHX_6);
+
 PERL_CALLCONV void	Perl_pregfree(pTHX_ struct regexp* r);
-PERL_CALLCONV regexp*	Perl_pregcomp(pTHX_ char* exp, char* xend, PMOP* pm);
+PERL_CALLCONV regexp*	Perl_pregcomp(pTHX_ char* exp, char* xend, PMOP* pm)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2)
+			__attribute__nonnull__(pTHX_3);
+
 PERL_CALLCONV char*	Perl_re_intuit_start(pTHX_ regexp* prog, SV* sv, char* strpos, char* strend, U32 flags, struct re_scream_pos_data_s *data);
 PERL_CALLCONV SV*	Perl_re_intuit_string(pTHX_ regexp* prog);
-PERL_CALLCONV I32	Perl_regexec_flags(pTHX_ regexp* prog, char* stringarg, char* strend, char* strbeg, I32 minend, SV* screamer, void* data, U32 flags);
+PERL_CALLCONV I32	Perl_regexec_flags(pTHX_ regexp* prog, char* stringarg, char* strend, char* strbeg, I32 minend, SV* screamer, void* data, U32 flags)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2)
+			__attribute__nonnull__(pTHX_3)
+			__attribute__nonnull__(pTHX_4);
+
 PERL_CALLCONV regnode*	Perl_regnext(pTHX_ regnode* p);
-PERL_CALLCONV void	Perl_regprop(pTHX_ SV* sv, regnode* o);
-PERL_CALLCONV void	Perl_repeatcpy(pTHX_ char* to, const char* from, I32 len, I32 count);
-PERL_CALLCONV char*	Perl_rninstr(pTHX_ const char* big, const char* bigend, const char* little, const char* lend);
+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)
+			__attribute__nonnull__(pTHX_2);
+
+PERL_CALLCONV char*	Perl_rninstr(pTHX_ const char* big, const char* bigend, const char* little, const char* lend)
+			__attribute__pure__
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2)
+			__attribute__nonnull__(pTHX_3)
+			__attribute__nonnull__(pTHX_4);
+
 PERL_CALLCONV Sighandler_t	Perl_rsignal(pTHX_ int i, Sighandler_t t);
 PERL_CALLCONV int	Perl_rsignal_restore(pTHX_ int i, Sigsave_t* t);
 PERL_CALLCONV int	Perl_rsignal_save(pTHX_ int i, Sighandler_t t1, Sigsave_t* t2);
 PERL_CALLCONV Sighandler_t	Perl_rsignal_state(pTHX_ int i);
-PERL_CALLCONV void	Perl_rxres_free(pTHX_ void** rsp);
-PERL_CALLCONV void	Perl_rxres_restore(pTHX_ void** rsp, REGEXP* prx);
-PERL_CALLCONV void	Perl_rxres_save(pTHX_ void** rsp, REGEXP* prx);
+PERL_CALLCONV void	Perl_rxres_free(pTHX_ void** rsp)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV void	Perl_rxres_restore(pTHX_ void** rsp, REGEXP* prx)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2);
+
+PERL_CALLCONV void	Perl_rxres_save(pTHX_ void** rsp, REGEXP* prx)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2);
+
 #if !defined(HAS_RENAME)
-PERL_CALLCONV I32	Perl_same_dirent(pTHX_ char* a, char* b);
+PERL_CALLCONV I32	Perl_same_dirent(pTHX_ const char* a, const char* b)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2);
+
 #endif
 PERL_CALLCONV char*	Perl_savepv(pTHX_ const char* pv);
 PERL_CALLCONV char*	Perl_savesharedpv(pTHX_ const char* pv);
@@ -624,7 +1238,9 @@ PERL_CALLCONV void	Perl_save_shared_pvref(pTHX_ char** str);
 PERL_CALLCONV void	Perl_save_gp(pTHX_ GV* gv, I32 empty);
 PERL_CALLCONV HV*	Perl_save_hash(pTHX_ GV* gv);
 PERL_CALLCONV void	Perl_save_helem(pTHX_ HV* hv, SV *key, SV **sptr);
-PERL_CALLCONV void	Perl_save_hints(pTHX) __attribute__((noreturn));
+PERL_CALLCONV void	Perl_save_hints(pTHX)
+			__attribute__noreturn__;
+
 PERL_CALLCONV void	Perl_save_hptr(pTHX_ HV** hptr);
 PERL_CALLCONV void	Perl_save_I16(pTHX_ I16* intp);
 PERL_CALLCONV void	Perl_save_I32(pTHX_ I32* intp);
@@ -644,7 +1260,9 @@ PERL_CALLCONV void	Perl_save_re_context(pTHX);
 PERL_CALLCONV void	Perl_save_padsv(pTHX_ PADOFFSET off);
 PERL_CALLCONV void	Perl_save_sptr(pTHX_ SV** sptr);
 PERL_CALLCONV SV*	Perl_save_svref(pTHX_ SV** sptr);
-PERL_CALLCONV SV**	Perl_save_threadsv(pTHX_ PADOFFSET i) __attribute__((noreturn));
+PERL_CALLCONV SV**	Perl_save_threadsv(pTHX_ PADOFFSET i)
+			__attribute__noreturn__;
+
 PERL_CALLCONV OP*	Perl_sawparens(pTHX_ OP* o);
 PERL_CALLCONV OP*	Perl_scalar(pTHX_ OP* o);
 PERL_CALLCONV OP*	Perl_scalarkids(pTHX_ OP* o);
@@ -663,68 +1281,199 @@ PERL_CALLCONV void	Perl_setdefout(pTHX_ GV* gv);
 PERL_CALLCONV HEK*	Perl_share_hek(pTHX_ const char* sv, I32 len, U32 hash);
 PERL_CALLCONV Signal_t	Perl_sighandler(int sig);
 PERL_CALLCONV Signal_t	Perl_csighandler(int sig);
-PERL_CALLCONV SV**	Perl_stack_grow(pTHX_ SV** sp, SV**p, int n);
-PERL_CALLCONV I32	Perl_start_subparse(pTHX_ I32 is_format, U32 flags);
+PERL_CALLCONV SV**	Perl_stack_grow(pTHX_ SV** sp, SV**p, int n)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2);
+
+PERL_CALLCONV I32	Perl_start_subparse(pTHX_ I32 is_format, U32 flags)
+			__attribute__warn_unused_result__;
+
 PERL_CALLCONV void	Perl_sub_crush_depth(pTHX_ CV* cv);
-PERL_CALLCONV bool	Perl_sv_2bool(pTHX_ SV* sv);
-PERL_CALLCONV CV*	Perl_sv_2cv(pTHX_ SV* sv, HV** st, GV** gvp, I32 lref);
-PERL_CALLCONV IO*	Perl_sv_2io(pTHX_ SV* sv);
-/* PERL_CALLCONV IV	sv_2iv(pTHX_ SV* sv); */
-PERL_CALLCONV IV	Perl_sv_2iv_flags(pTHX_ SV* sv, I32 flags);
-PERL_CALLCONV SV*	Perl_sv_2mortal(pTHX_ SV* sv);
-PERL_CALLCONV NV	Perl_sv_2nv(pTHX_ SV* sv);
-/* PERL_CALLCONV char*	sv_2pv(pTHX_ SV* sv, STRLEN* lp); */
-PERL_CALLCONV char*	Perl_sv_2pvutf8(pTHX_ SV* sv, STRLEN* lp);
-PERL_CALLCONV char*	Perl_sv_2pvbyte(pTHX_ SV* sv, STRLEN* lp);
-PERL_CALLCONV char*	Perl_sv_pvn_nomg(pTHX_ SV* sv, STRLEN* lp);
-/* PERL_CALLCONV UV	sv_2uv(pTHX_ SV* sv); */
-PERL_CALLCONV UV	Perl_sv_2uv_flags(pTHX_ SV* sv, I32 flags);
-PERL_CALLCONV IV	Perl_sv_iv(pTHX_ SV* sv);
-PERL_CALLCONV UV	Perl_sv_uv(pTHX_ SV* sv);
-PERL_CALLCONV NV	Perl_sv_nv(pTHX_ SV* sv);
-PERL_CALLCONV char*	Perl_sv_pvn(pTHX_ SV *sv, STRLEN *len);
-PERL_CALLCONV char*	Perl_sv_pvutf8n(pTHX_ SV *sv, STRLEN *len);
-PERL_CALLCONV char*	Perl_sv_pvbyten(pTHX_ SV *sv, STRLEN *len);
-PERL_CALLCONV I32	Perl_sv_true(pTHX_ SV *sv);
-PERL_CALLCONV void	Perl_sv_add_arena(pTHX_ char* ptr, U32 size, U32 flags);
-PERL_CALLCONV int	Perl_sv_backoff(pTHX_ SV* sv);
-PERL_CALLCONV SV*	Perl_sv_bless(pTHX_ SV* sv, HV* stash);
+PERL_CALLCONV bool	Perl_sv_2bool(pTHX_ SV* sv)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV CV*	Perl_sv_2cv(pTHX_ SV* sv, HV** st, GV** gvp, I32 lref)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV IO*	Perl_sv_2io(pTHX_ SV* sv)
+			__attribute__nonnull__(pTHX_1);
+
+/* PERL_CALLCONV IV	sv_2iv(pTHX_ SV* sv)
+			__attribute__nonnull__(pTHX_1); */
+
+PERL_CALLCONV IV	Perl_sv_2iv_flags(pTHX_ SV* sv, I32 flags)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV SV*	Perl_sv_2mortal(pTHX_ SV* sv)
+			__attribute__nonnull__(pTHX_1);
+
+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); */
+
+PERL_CALLCONV char*	Perl_sv_2pv_flags(pTHX_ SV* sv, STRLEN* lp, I32 flags)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2);
+
+PERL_CALLCONV char*	Perl_sv_2pvutf8(pTHX_ SV* sv, STRLEN* lp)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2);
+
+PERL_CALLCONV char*	Perl_sv_2pvbyte(pTHX_ SV* sv, STRLEN* lp)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2);
+
+PERL_CALLCONV char*	Perl_sv_pvn_nomg(pTHX_ SV* sv, STRLEN* lp)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2);
+
+/* PERL_CALLCONV UV	sv_2uv(pTHX_ SV* sv)
+			__attribute__nonnull__(pTHX_1); */
+
+PERL_CALLCONV UV	Perl_sv_2uv_flags(pTHX_ SV* sv, I32 flags)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV IV	Perl_sv_iv(pTHX_ SV* sv)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV UV	Perl_sv_uv(pTHX_ SV* sv)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV NV	Perl_sv_nv(pTHX_ SV* sv)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV char*	Perl_sv_pvn(pTHX_ SV *sv, STRLEN *len)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2);
+
+PERL_CALLCONV char*	Perl_sv_pvutf8n(pTHX_ SV *sv, STRLEN *len)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2);
+
+PERL_CALLCONV char*	Perl_sv_pvbyten(pTHX_ SV *sv, STRLEN *len)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2);
+
+PERL_CALLCONV I32	Perl_sv_true(pTHX_ SV *sv)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV void	Perl_sv_add_arena(pTHX_ char* ptr, U32 size, U32 flags)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV int	Perl_sv_backoff(pTHX_ SV* sv)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV SV*	Perl_sv_bless(pTHX_ SV* sv, HV* stash)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2);
+
 PERL_CALLCONV void	Perl_sv_catpvf(pTHX_ SV* sv, const char* pat, ...)
-	__attribute__format__(__printf__,pTHX_2,pTHX_3);
-PERL_CALLCONV void	Perl_sv_vcatpvf(pTHX_ SV* sv, const char* pat, va_list* args);
-PERL_CALLCONV void	Perl_sv_catpv(pTHX_ SV* sv, const char* ptr);
-/* PERL_CALLCONV void	sv_catpvn(pTHX_ SV* sv, const char* ptr, STRLEN len); */
-/* PERL_CALLCONV void	sv_catsv(pTHX_ SV* dsv, SV* ssv); */
-PERL_CALLCONV void	Perl_sv_chop(pTHX_ SV* sv, char* ptr);
+			__attribute__format__(__printf__,pTHX_2,pTHX_3)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV void	Perl_sv_vcatpvf(pTHX_ SV* sv, const char* pat, va_list* args)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV void	Perl_sv_catpv(pTHX_ SV* sv, const char* ptr)
+			__attribute__nonnull__(pTHX_1);
+
+/* PERL_CALLCONV void	sv_catpvn(pTHX_ SV* sv, const char* ptr, STRLEN len)
+			__attribute__nonnull__(pTHX_1); */
+
+/* PERL_CALLCONV void	sv_catsv(pTHX_ SV* dsv, SV* ssv)
+			__attribute__nonnull__(pTHX_1); */
+
+PERL_CALLCONV void	Perl_sv_chop(pTHX_ SV* sv, const char* ptr)
+			__attribute__nonnull__(pTHX_1);
+
 PERL_CALLCONV I32	Perl_sv_clean_all(pTHX);
 PERL_CALLCONV void	Perl_sv_clean_objs(pTHX);
-PERL_CALLCONV void	Perl_sv_clear(pTHX_ SV* sv);
-PERL_CALLCONV I32	Perl_sv_cmp(pTHX_ SV* sv1, SV* sv2);
-PERL_CALLCONV I32	Perl_sv_cmp_locale(pTHX_ SV* sv1, SV* sv2);
+PERL_CALLCONV void	Perl_sv_clear(pTHX_ SV* sv)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV I32	Perl_sv_cmp(pTHX_ SV* sv1, SV* sv2)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2);
+
+PERL_CALLCONV I32	Perl_sv_cmp_locale(pTHX_ SV* sv1, SV* sv2)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2);
+
 #if defined(USE_LOCALE_COLLATE)
-PERL_CALLCONV char*	Perl_sv_collxfrm(pTHX_ SV* sv, STRLEN* nxp);
-#endif
-PERL_CALLCONV OP*	Perl_sv_compile_2op(pTHX_ SV* sv, OP** startp, const char* code, PAD** padp);
-PERL_CALLCONV int	Perl_getcwd_sv(pTHX_ SV* sv);
-PERL_CALLCONV void	Perl_sv_dec(pTHX_ SV* sv);
-PERL_CALLCONV void	Perl_sv_dump(pTHX_ SV* sv);
-PERL_CALLCONV bool	Perl_sv_derived_from(pTHX_ SV* sv, const char* name);
-PERL_CALLCONV I32	Perl_sv_eq(pTHX_ SV* sv1, SV* sv2);
+PERL_CALLCONV char*	Perl_sv_collxfrm(pTHX_ SV* sv, STRLEN* nxp)
+			__attribute__nonnull__(pTHX_1);
+
+#endif
+PERL_CALLCONV OP*	Perl_sv_compile_2op(pTHX_ SV* sv, OP** startp, const char* code, PAD** padp)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2)
+			__attribute__nonnull__(pTHX_3)
+			__attribute__nonnull__(pTHX_4);
+
+PERL_CALLCONV int	Perl_getcwd_sv(pTHX_ SV* sv)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV void	Perl_sv_dec(pTHX_ SV* sv)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV void	Perl_sv_dump(pTHX_ SV* sv)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV bool	Perl_sv_derived_from(pTHX_ SV* sv, const char* name)
+			__attribute__warn_unused_result__
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2);
+
+PERL_CALLCONV I32	Perl_sv_eq(pTHX_ SV* sv1, SV* sv2)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2);
+
 PERL_CALLCONV void	Perl_sv_free(pTHX_ SV* sv);
-PERL_CALLCONV void	Perl_sv_free2(pTHX_ SV* sv);
+PERL_CALLCONV void	Perl_sv_free2(pTHX_ SV* sv)
+			__attribute__nonnull__(pTHX_1);
+
 PERL_CALLCONV void	Perl_sv_free_arenas(pTHX);
-PERL_CALLCONV char*	Perl_sv_gets(pTHX_ SV* sv, PerlIO* fp, I32 append);
-PERL_CALLCONV char*	Perl_sv_grow(pTHX_ SV* sv, STRLEN newlen);
-PERL_CALLCONV void	Perl_sv_inc(pTHX_ SV* sv);
-PERL_CALLCONV void	Perl_sv_insert(pTHX_ SV* bigsv, STRLEN offset, STRLEN len, const char* little, STRLEN littlelen);
-PERL_CALLCONV int	Perl_sv_isa(pTHX_ SV* sv, const char* name);
-PERL_CALLCONV int	Perl_sv_isobject(pTHX_ SV* sv);
-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);
-PERL_CALLCONV MAGIC *	Perl_sv_magicext(pTHX_ SV* sv, SV* obj, int how, const MGVTBL *vtbl, const char* name, I32 namlen);
-PERL_CALLCONV SV*	Perl_sv_mortalcopy(pTHX_ SV* oldsv);
-PERL_CALLCONV SV*	Perl_sv_newmortal(pTHX);
+PERL_CALLCONV char*	Perl_sv_gets(pTHX_ SV* sv, PerlIO* fp, I32 append)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2);
+
+PERL_CALLCONV char*	Perl_sv_grow(pTHX_ SV* sv, STRLEN newlen)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV void	Perl_sv_inc(pTHX_ SV* sv)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV void	Perl_sv_insert(pTHX_ SV* bigsv, STRLEN offset, STRLEN len, const char* little, STRLEN littlelen)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_4);
+
+PERL_CALLCONV int	Perl_sv_isa(pTHX_ SV* sv, const char* name)
+			__attribute__nonnull__(pTHX_1);
+
+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 void	Perl_sv_magic(pTHX_ SV* sv, SV* obj, int how, const char* name, I32 namlen)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV MAGIC *	Perl_sv_magicext(pTHX_ SV* sv, SV* obj, int how, const MGVTBL *vtbl, const char* name, I32 namlen)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV SV*	Perl_sv_mortalcopy(pTHX_ SV* oldsv)
+			__attribute__nonnull__(pTHX_1);
+
+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);
@@ -734,12 +1483,19 @@ PERL_CALLCONV char*	Perl_sv_pvutf8n_force(pTHX_ SV* sv, STRLEN* lp);
 PERL_CALLCONV char*	Perl_sv_pvbyten_force(pTHX_ SV* sv, STRLEN* lp);
 PERL_CALLCONV char*	Perl_sv_recode_to_utf8(pTHX_ SV* sv, SV *encoding);
 PERL_CALLCONV bool	Perl_sv_cat_decode(pTHX_ SV* dsv, SV *encoding, SV *ssv, int *offset, char* tstr, int tlen);
-PERL_CALLCONV char*	Perl_sv_reftype(pTHX_ const SV* sv, int ob);
-PERL_CALLCONV void	Perl_sv_replace(pTHX_ SV* sv, SV* nsv);
+PERL_CALLCONV char*	Perl_sv_reftype(pTHX_ const SV* sv, int ob)
+			__attribute__warn_unused_result__
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV void	Perl_sv_replace(pTHX_ SV* sv, SV* nsv)
+			__attribute__nonnull__(pTHX_1)
+			__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_setpvf(pTHX_ SV* sv, const char* pat, ...)
-	__attribute__format__(__printf__,pTHX_2,pTHX_3);
+			__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);
@@ -751,54 +1507,116 @@ 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 void	Perl_sv_setpv(pTHX_ SV* sv, const char* ptr);
-PERL_CALLCONV void	Perl_sv_setpvn(pTHX_ SV* sv, const char* ptr, STRLEN len);
+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 int	Perl_sv_unmagic(pTHX_ SV* sv, int type);
-PERL_CALLCONV void	Perl_sv_unref(pTHX_ SV* sv);
-PERL_CALLCONV void	Perl_sv_unref_flags(pTHX_ SV* sv, U32 flags);
-PERL_CALLCONV void	Perl_sv_untaint(pTHX_ SV* sv);
-PERL_CALLCONV bool	Perl_sv_upgrade(pTHX_ SV* sv, U32 mt);
-PERL_CALLCONV void	Perl_sv_usepvn(pTHX_ SV* sv, char* ptr, STRLEN len);
-PERL_CALLCONV void	Perl_sv_vcatpvfn(pTHX_ SV* sv, const char* pat, STRLEN patlen, va_list* args, SV** svargs, I32 svmax, bool *maybe_tainted);
-PERL_CALLCONV void	Perl_sv_vsetpvfn(pTHX_ SV* sv, const char* pat, STRLEN patlen, va_list* args, SV** svargs, I32 svmax, bool *maybe_tainted);
+PERL_CALLCONV int	Perl_sv_unmagic(pTHX_ SV* sv, int type)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV void	Perl_sv_unref(pTHX_ SV* sv)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV void	Perl_sv_unref_flags(pTHX_ SV* sv, U32 flags)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV void	Perl_sv_untaint(pTHX_ SV* sv)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV bool	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)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV void	Perl_sv_vcatpvfn(pTHX_ SV* sv, const char* pat, STRLEN patlen, va_list* args, SV** svargs, I32 svmax, bool *maybe_tainted)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2);
+
+PERL_CALLCONV void	Perl_sv_vsetpvfn(pTHX_ SV* sv, const char* pat, STRLEN patlen, va_list* args, SV** svargs, I32 svmax, bool *maybe_tainted)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2);
+
 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 UV	Perl_to_utf8_case(pTHX_ const U8 *p, U8* ustrp, STRLEN *lenp, SV **swash, const char *normal, const char *special);
-PERL_CALLCONV UV	Perl_to_utf8_lower(pTHX_ const U8 *p, U8* ustrp, STRLEN *lenp);
-PERL_CALLCONV UV	Perl_to_utf8_upper(pTHX_ const U8 *p, U8* ustrp, STRLEN *lenp);
-PERL_CALLCONV UV	Perl_to_utf8_title(pTHX_ const U8 *p, U8* ustrp, STRLEN *lenp);
-PERL_CALLCONV UV	Perl_to_utf8_fold(pTHX_ const U8 *p, U8* ustrp, STRLEN *lenp);
+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);
+
+PERL_CALLCONV UV	Perl_to_utf8_lower(pTHX_ const U8 *p, U8* ustrp, STRLEN *lenp)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2);
+
+PERL_CALLCONV UV	Perl_to_utf8_upper(pTHX_ const U8 *p, U8* ustrp, STRLEN *lenp)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2);
+
+PERL_CALLCONV UV	Perl_to_utf8_title(pTHX_ const U8 *p, U8* ustrp, STRLEN *lenp)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2);
+
+PERL_CALLCONV UV	Perl_to_utf8_fold(pTHX_ const U8 *p, U8* ustrp, STRLEN *lenp)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2);
+
 #if defined(UNLINK_ALL_VERSIONS)
 PERL_CALLCONV I32	Perl_unlnk(pTHX_ char* f);
 #endif
-PERL_CALLCONV I32	Perl_unpack_str(pTHX_ char *pat, char *patend, char *s, char *strbeg, char *strend, char **new_s, I32 ocnt, U32 flags);
-PERL_CALLCONV I32	Perl_unpackstring(pTHX_ char *pat, char *patend, char *s, char *strend, U32 flags);
+PERL_CALLCONV I32	Perl_unpack_str(pTHX_ const char *pat, const char *patend, const char *s, const char *strbeg, const char *strend, char **new_s, I32 ocnt, U32 flags);
+PERL_CALLCONV I32	Perl_unpackstring(pTHX_ const char *pat, const char *patend, const char *s, const char *strend, U32 flags);
 PERL_CALLCONV void	Perl_unsharepvn(pTHX_ const char* sv, I32 len, U32 hash);
 PERL_CALLCONV void	Perl_unshare_hek(pTHX_ HEK* hek);
 PERL_CALLCONV void	Perl_utilize(pTHX_ int aver, I32 floor, OP* version, OP* idop, OP* arg);
 PERL_CALLCONV U8*	Perl_utf16_to_utf8(pTHX_ U8* p, U8 *d, I32 bytelen, I32 *newlen);
 PERL_CALLCONV U8*	Perl_utf16_to_utf8_reversed(pTHX_ U8* p, U8 *d, I32 bytelen, I32 *newlen);
-PERL_CALLCONV STRLEN	Perl_utf8_length(pTHX_ const U8* s, const U8 *e);
-PERL_CALLCONV IV	Perl_utf8_distance(pTHX_ const U8 *a, const U8 *b);
-PERL_CALLCONV U8*	Perl_utf8_hop(pTHX_ U8 *s, I32 off);
-PERL_CALLCONV U8*	Perl_utf8_to_bytes(pTHX_ U8 *s, STRLEN *len);
+PERL_CALLCONV STRLEN	Perl_utf8_length(pTHX_ const U8* s, const U8 *e)
+			__attribute__warn_unused_result__
+			__attribute__pure__
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2);
+
+PERL_CALLCONV IV	Perl_utf8_distance(pTHX_ const U8 *a, const U8 *b)
+			__attribute__warn_unused_result__
+			__attribute__pure__
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2);
+
+PERL_CALLCONV U8*	Perl_utf8_hop(pTHX_ const U8 *s, I32 off)
+			__attribute__warn_unused_result__
+			__attribute__pure__
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV U8*	Perl_utf8_to_bytes(pTHX_ U8 *s, STRLEN *len)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2);
+
 PERL_CALLCONV U8*	Perl_bytes_from_utf8(pTHX_ const U8 *s, STRLEN *len, bool *is_utf8);
 PERL_CALLCONV U8*	Perl_bytes_to_utf8(pTHX_ const U8 *s, STRLEN *len);
 PERL_CALLCONV UV	Perl_utf8_to_uvchr(pTHX_ const U8 *s, STRLEN* retlen);
 PERL_CALLCONV UV	Perl_utf8_to_uvuni(pTHX_ const U8 *s, STRLEN* retlen);
 PERL_CALLCONV UV	Perl_utf8n_to_uvchr(pTHX_ const U8 *s, STRLEN curlen, STRLEN* retlen, U32 flags);
 PERL_CALLCONV UV	Perl_utf8n_to_uvuni(pTHX_ const U8 *s, STRLEN curlen, STRLEN* retlen, U32 flags);
-PERL_CALLCONV U8*	Perl_uvchr_to_utf8(pTHX_ U8 *d, UV uv);
-PERL_CALLCONV U8*	Perl_uvuni_to_utf8(pTHX_ U8 *d, UV uv);
-PERL_CALLCONV U8*	Perl_uvchr_to_utf8_flags(pTHX_ U8 *d, UV uv, UV flags);
-PERL_CALLCONV U8*	Perl_uvuni_to_utf8_flags(pTHX_ U8 *d, UV uv, UV flags);
+PERL_CALLCONV U8*	Perl_uvchr_to_utf8(pTHX_ U8 *d, UV uv)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV U8*	Perl_uvuni_to_utf8(pTHX_ U8 *d, UV uv)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV U8*	Perl_uvchr_to_utf8_flags(pTHX_ U8 *d, UV uv, UV flags)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV U8*	Perl_uvuni_to_utf8_flags(pTHX_ U8 *d, UV uv, UV flags)
+			__attribute__nonnull__(pTHX_1);
+
 PERL_CALLCONV char*	Perl_pv_uni_display(pTHX_ SV *dsv, const U8 *spv, STRLEN len, STRLEN pvlim, UV flags);
-PERL_CALLCONV char*	Perl_sv_uni_display(pTHX_ SV *dsv, SV *ssv, STRLEN pvlim, UV flags);
+PERL_CALLCONV char*	Perl_sv_uni_display(pTHX_ SV *dsv, SV *ssv, STRLEN pvlim, UV flags)
+			__attribute__warn_unused_result__;
+
 PERL_CALLCONV void	Perl_vivify_defelem(pTHX_ SV* sv);
 PERL_CALLCONV void	Perl_vivify_ref(pTHX_ SV* sv, U32 to_what);
 PERL_CALLCONV I32	Perl_wait4pid(pTHX_ Pid_t pid, int* statusp, int flags);
@@ -808,10 +1626,12 @@ PERL_CALLCONV UV	Perl_get_hash_seed(pTHX);
 PERL_CALLCONV void	Perl_report_evil_fh(pTHX_ const GV *gv, const IO *io, I32 op);
 PERL_CALLCONV void	Perl_report_uninit(pTHX_ SV* uninit_sv);
 PERL_CALLCONV void	Perl_warn(pTHX_ const char* pat, ...)
-	__attribute__format__(__printf__,pTHX_1,pTHX_2);
+			__attribute__format__(__printf__,pTHX_1,pTHX_2);
+
 PERL_CALLCONV void	Perl_vwarn(pTHX_ const char* pat, va_list* args);
 PERL_CALLCONV void	Perl_warner(pTHX_ U32 err, const char* pat, ...)
-	__attribute__format__(__printf__,pTHX_2,pTHX_3);
+			__attribute__format__(__printf__,pTHX_2,pTHX_3);
+
 PERL_CALLCONV void	Perl_vwarner(pTHX_ U32 err, const char* pat, va_list* args);
 PERL_CALLCONV void	Perl_watch(pTHX_ char** addr);
 PERL_CALLCONV I32	Perl_whichsig(pTHX_ const char* sig);
@@ -824,23 +1644,36 @@ PERL_CALLCONV int	Perl_yywarn(pTHX_ const char* s);
 PERL_CALLCONV void	Perl_dump_mstats(pTHX_ char* s);
 PERL_CALLCONV int	Perl_get_mstats(pTHX_ perl_mstats_t *buf, int buflen, int level);
 #endif
-PERL_CALLCONV Malloc_t	Perl_safesysmalloc(MEM_SIZE nbytes);
-PERL_CALLCONV Malloc_t	Perl_safesyscalloc(MEM_SIZE elements, MEM_SIZE size);
-PERL_CALLCONV Malloc_t	Perl_safesysrealloc(Malloc_t where, MEM_SIZE nbytes);
+PERL_CALLCONV Malloc_t	Perl_safesysmalloc(MEM_SIZE nbytes)
+			__attribute__malloc__
+			__attribute__warn_unused_result__;
+
+PERL_CALLCONV Malloc_t	Perl_safesyscalloc(MEM_SIZE elements, MEM_SIZE size)
+			__attribute__malloc__
+			__attribute__warn_unused_result__;
+
+PERL_CALLCONV Malloc_t	Perl_safesysrealloc(Malloc_t where, MEM_SIZE nbytes)
+			__attribute__malloc__
+			__attribute__warn_unused_result__;
+
 PERL_CALLCONV Free_t	Perl_safesysfree(Malloc_t where);
 #if defined(PERL_GLOBAL_STRUCT)
 PERL_CALLCONV struct perl_vars *	Perl_GetVars(pTHX);
+PERL_CALLCONV struct perl_vars*	Perl_init_global_struct(pTHX);
+PERL_CALLCONV void	Perl_free_global_struct(pTHX_ struct perl_vars*);
 #endif
 PERL_CALLCONV int	Perl_runops_standard(pTHX);
 PERL_CALLCONV int	Perl_runops_debug(pTHX);
 PERL_CALLCONV void	Perl_sv_catpvf_mg(pTHX_ SV *sv, const char* pat, ...)
-	__attribute__format__(__printf__,pTHX_2,pTHX_3);
+			__attribute__format__(__printf__,pTHX_2,pTHX_3);
+
 PERL_CALLCONV void	Perl_sv_vcatpvf_mg(pTHX_ SV* sv, const char* pat, va_list* args);
 PERL_CALLCONV void	Perl_sv_catpv_mg(pTHX_ SV *sv, const char *ptr);
 PERL_CALLCONV void	Perl_sv_catpvn_mg(pTHX_ SV *sv, const char *ptr, STRLEN len);
 PERL_CALLCONV void	Perl_sv_catsv_mg(pTHX_ SV *dstr, SV *sstr);
 PERL_CALLCONV void	Perl_sv_setpvf_mg(pTHX_ SV *sv, const char* pat, ...)
-	__attribute__format__(__printf__,pTHX_2,pTHX_3);
+			__attribute__format__(__printf__,pTHX_2,pTHX_3);
+
 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);
@@ -853,7 +1686,8 @@ 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);
+			__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);
@@ -881,8 +1715,12 @@ PERL_CALLCONV SV*	Perl_sv_rvweaken(pTHX_ SV *sv);
 PERL_CALLCONV int	Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg);
 PERL_CALLCONV OP*	Perl_newANONATTRSUB(pTHX_ I32 floor, OP *proto, OP *attrs, OP *block);
 PERL_CALLCONV CV*	Perl_newATTRSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block);
-PERL_CALLCONV void	Perl_newMYSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block) __attribute__((noreturn));
-PERL_CALLCONV OP *	Perl_my_attrs(pTHX_ OP *o, OP *attrs);
+PERL_CALLCONV void	Perl_newMYSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block)
+			__attribute__noreturn__;
+
+PERL_CALLCONV OP *	Perl_my_attrs(pTHX_ OP *o, OP *attrs)
+			__attribute__nonnull__(pTHX_1);
+
 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);
@@ -901,9 +1739,16 @@ PERL_CALLCONV void	Perl_rvpv_dup(pTHX_ SV* dstr, SV *sstr, CLONE_PARAMS* param);
 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);
-PERL_CALLCONV void	Perl_ptr_table_store(pTHX_ PTR_TBL_t *tbl, void *oldsv, void *newsv);
-PERL_CALLCONV void	Perl_ptr_table_split(pTHX_ PTR_TBL_t *tbl);
+PERL_CALLCONV void*	Perl_ptr_table_fetch(pTHX_ PTR_TBL_t *tbl, void *sv)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2);
+
+PERL_CALLCONV void	Perl_ptr_table_store(pTHX_ PTR_TBL_t *tbl, void *oldsv, void *newsv)
+			__attribute__nonnull__(pTHX_1);
+
+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);
 #endif
@@ -912,8 +1757,12 @@ PERL_CALLCONV void	Perl_sys_intern_clear(pTHX);
 PERL_CALLCONV void	Perl_sys_intern_init(pTHX);
 #endif
 
-PERL_CALLCONV char *	Perl_custom_op_name(pTHX_ const OP* op);
-PERL_CALLCONV char *	Perl_custom_op_desc(pTHX_ const OP* op);
+PERL_CALLCONV char *	Perl_custom_op_name(pTHX_ const OP* op)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV char *	Perl_custom_op_desc(pTHX_ const OP* op)
+			__attribute__nonnull__(pTHX_1);
+
 
 #if defined(PERL_COPY_ON_WRITE)
 PERL_CALLCONV int	Perl_sv_release_IVX(pTHX_ SV *sv);
@@ -927,30 +1776,45 @@ PERL_CALLCONV int	Perl_nothreadhook(pTHX);
 END_EXTERN_C
 
 #if defined(PERL_IN_DOOP_C) || defined(PERL_DECL_PROT)
-STATIC I32	S_do_trans_simple(pTHX_ SV *sv);
-STATIC I32	S_do_trans_count(pTHX_ SV *sv);
-STATIC I32	S_do_trans_complex(pTHX_ SV *sv);
-STATIC I32	S_do_trans_simple_utf8(pTHX_ SV *sv);
-STATIC I32	S_do_trans_count_utf8(pTHX_ SV *sv);
-STATIC I32	S_do_trans_complex_utf8(pTHX_ SV *sv);
+STATIC I32	S_do_trans_simple(pTHX_ SV *sv)
+			__attribute__nonnull__(pTHX_1);
+
+STATIC I32	S_do_trans_count(pTHX_ SV *sv)
+			__attribute__nonnull__(pTHX_1);
+
+STATIC I32	S_do_trans_complex(pTHX_ SV *sv)
+			__attribute__nonnull__(pTHX_1);
+
+STATIC I32	S_do_trans_simple_utf8(pTHX_ SV *sv)
+			__attribute__nonnull__(pTHX_1);
+
+STATIC I32	S_do_trans_count_utf8(pTHX_ SV *sv)
+			__attribute__nonnull__(pTHX_1);
+
+STATIC I32	S_do_trans_complex_utf8(pTHX_ SV *sv)
+			__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_require_errno(pTHX_ GV *gv);
+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_hfreeentries(pTHX_ HV *hv);
-STATIC void	S_more_he(pTHX);
 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 void	S_hv_notallowed(pTHX_ int flags, const char *key, I32 klen, const char *msg)
+			__attribute__noreturn__;
+
 #endif
 
 #if defined(PERL_IN_MG_C) || defined(PERL_DECL_PROT)
@@ -996,7 +1860,9 @@ STATIC void	S_init_main_stash(pTHX);
 STATIC void	S_init_perllib(pTHX);
 STATIC void	S_init_postdump_symbols(pTHX_ int, char **, char **);
 STATIC void	S_init_predump_symbols(pTHX);
-STATIC void	S_my_exit_jump(pTHX) __attribute__((noreturn));
+STATIC void	S_my_exit_jump(pTHX)
+			__attribute__noreturn__;
+
 STATIC void	S_nuke_stacks(pTHX);
 STATIC void	S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv);
 STATIC void	S_usage(pTHX_ const char *name);
@@ -1005,7 +1871,9 @@ STATIC void	S_validate_suid(pTHX_ const char *validarg, const char *scriptname);
 STATIC int	S_fd_on_nosuid_fs(pTHX_ int fd);
 #  endif
 STATIC void*	S_parse_body(pTHX_ char **env, XSINIT_t xsinit);
-STATIC void	S_run_body(pTHX_ I32 oldscope) __attribute__((noreturn));
+STATIC void	S_run_body(pTHX_ I32 oldscope)
+			__attribute__noreturn__;
+
 STATIC void	S_call_body(pTHX_ const OP *myop, bool is_eval);
 STATIC void*	S_call_list_body(pTHX_ CV *cv);
 #endif
@@ -1015,15 +1883,32 @@ STATIC SV*	S_refto(pTHX_ SV* sv);
 #endif
 
 #if defined(PERL_IN_PP_PACK_C) || defined(PERL_DECL_PROT)
-STATIC I32	S_unpack_rec(pTHX_ tempsym_t* symptr, char *s, char *strbeg, char *strend, char **new_s);
-STATIC SV **	S_pack_rec(pTHX_ SV *cat, tempsym_t* symptr, SV **beglist, SV **endlist);
-STATIC SV*	S_mul128(pTHX_ SV *sv, U8 m);
-STATIC I32	S_measure_struct(pTHX_ tempsym_t* symptr);
-STATIC char *	S_group_end(pTHX_ char *pat, char *patend, char ender);
-STATIC char *	S_get_num(pTHX_ char *ppat, I32 *);
-STATIC bool	S_next_symbol(pTHX_ tempsym_t* symptr);
-STATIC SV*	S_is_an_int(pTHX_ char *s, STRLEN l);
-STATIC int	S_div128(pTHX_ SV *pnum, bool *done);
+STATIC I32	S_unpack_rec(pTHX_ struct tempsym* symptr, const char *s, const char *strbeg, const char *strend, const char **new_s);
+STATIC SV **	S_pack_rec(pTHX_ SV *cat, struct tempsym* symptr, SV **beglist, SV **endlist);
+STATIC SV*	S_mul128(pTHX_ SV *sv, U8 m)
+			__attribute__nonnull__(pTHX_1);
+
+STATIC I32	S_measure_struct(pTHX_ struct tempsym* symptr)
+			__attribute__nonnull__(pTHX_1);
+
+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__nonnull__(pTHX_1);
+
+STATIC int	S_div128(pTHX_ SV *pnum, bool *done)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2);
+
+STATIC const char *	S_group_end(pTHX_ const char *pat, const char *patend, char ender)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2);
+
+STATIC const char *	S_get_num(pTHX_ const char *ppat, I32 *lenptr)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2);
+
 #endif
 
 #if defined(PERL_IN_PP_CTL_C) || defined(PERL_DECL_PROT)
@@ -1033,14 +1918,18 @@ STATIC OP*	S_dofindlabel(pTHX_ OP *o, const char *label, OP **opstack, OP **opli
 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 I32	S_dopoptolabel(pTHX_ const char *label);
+STATIC I32	S_dopoptolabel(pTHX_ const char *label)
+			__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 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 bool	S_path_is_absolute(pTHX_ const char *name);
+STATIC bool	S_path_is_absolute(pTHX_ const char *name)
+			__attribute__nonnull__(pTHX_1);
+
 #endif
 
 #if defined(PERL_IN_PP_HOT_C) || defined(PERL_DECL_PROT)
@@ -1064,7 +1953,10 @@ 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 I32	S_regcurly(pTHX_ char *);
+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 *);
@@ -1085,7 +1977,9 @@ STATIC void	S_cl_and(pTHX_ struct regnode_charclass_class *cl, struct regnode_ch
 STATIC void	S_cl_or(pTHX_ struct RExC_state_t*, struct regnode_charclass_class *cl, struct regnode_charclass_class *or_with);
 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, ...) __attribute__((noreturn));
+STATIC void	S_re_croak2(pTHX_ const char* pat1, const char* pat2, ...)
+			__attribute__noreturn__;
+
 STATIC I32	S_regpposixcc(pTHX_ struct RExC_state_t*, I32 value);
 STATIC void	S_checkposixcc(pTHX_ struct RExC_state_t*);
 
@@ -1093,22 +1987,58 @@ STATIC I32	S_make_trie(pTHX_ struct RExC_state_t*, regnode *startbranch, regnode
 #endif
 
 #if defined(PERL_IN_REGEXEC_C) || defined(PERL_DECL_PROT)
-STATIC I32	S_regmatch(pTHX_ regnode *prog);
-STATIC I32	S_regrepeat(pTHX_ regnode *p, I32 max);
-STATIC I32	S_regrepeat_hard(pTHX_ regnode *p, I32 max, I32 *lp);
-STATIC I32	S_regtry(pTHX_ regexp *prog, char *startpos);
-STATIC bool	S_reginclass(pTHX_ regnode *n, U8 *p, STRLEN *lenp, bool do_utf8sv_is_utf8);
+STATIC I32	S_regmatch(pTHX_ regnode *prog)
+			__attribute__warn_unused_result__
+			__attribute__nonnull__(pTHX_1);
+
+STATIC I32	S_regrepeat(pTHX_ const regnode *p, I32 max)
+			__attribute__warn_unused_result__
+			__attribute__nonnull__(pTHX_1);
+
+STATIC I32	S_regrepeat_hard(pTHX_ regnode *p, I32 max, I32 *lp)
+			__attribute__warn_unused_result__
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_3);
+
+STATIC I32	S_regtry(pTHX_ regexp *prog, char *startpos)
+			__attribute__warn_unused_result__;
+
+STATIC bool	S_reginclass(pTHX_ const regnode *n, const U8 *p, STRLEN *lenp, bool do_utf8sv_is_utf8)
+			__attribute__warn_unused_result__
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2);
+
 STATIC CHECKPOINT	S_regcppush(pTHX_ I32 parenfloor);
 STATIC char*	S_regcppop(pTHX);
 STATIC char*	S_regcp_set_to(pTHX_ I32 ss);
 STATIC void	S_cache_re(pTHX_ regexp *prog);
-STATIC U8*	S_reghop(pTHX_ U8 *pos, I32 off);
-STATIC U8*	S_reghop3(pTHX_ U8 *pos, I32 off, U8 *lim);
-STATIC U8*	S_reghopmaybe(pTHX_ U8 *pos, I32 off);
-STATIC U8*	S_reghopmaybe3(pTHX_ U8 *pos, I32 off, U8 *lim);
-STATIC char*	S_find_byclass(pTHX_ regexp * prog, regnode *c, char *s, char *strend, I32 norun);
-STATIC void	S_to_utf8_substr(pTHX_ regexp * prog);
-STATIC void	S_to_byte_substr(pTHX_ regexp * prog);
+STATIC U8*	S_reghop(pTHX_ U8 *pos, I32 off)
+			__attribute__warn_unused_result__;
+
+STATIC U8*	S_reghop3(pTHX_ U8 *pos, I32 off, U8 *lim)
+			__attribute__warn_unused_result__;
+
+STATIC U8*	S_reghopmaybe(pTHX_ U8 *pos, I32 off)
+			__attribute__warn_unused_result__;
+
+STATIC U8*	S_reghopmaybe3(pTHX_ U8 *pos, I32 off, U8 *lim)
+			__attribute__warn_unused_result__
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_3);
+
+STATIC char*	S_find_byclass(pTHX_ regexp * prog, regnode *c, char *s, const char *strend, I32 norun)
+			__attribute__warn_unused_result__
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2)
+			__attribute__nonnull__(pTHX_3)
+			__attribute__nonnull__(pTHX_4);
+
+STATIC void	S_to_utf8_substr(pTHX_ regexp * prog)
+			__attribute__nonnull__(pTHX_1);
+
+STATIC void	S_to_byte_substr(pTHX_ regexp * prog)
+			__attribute__nonnull__(pTHX_1);
+
 #endif
 
 #if defined(PERL_IN_DUMP_C) || defined(PERL_DECL_PROT)
@@ -1123,20 +2053,6 @@ STATIC SV*	S_save_scalar_at(pTHX_ SV **sptr);
 #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 SV*	S_more_sv(pTHX);
-STATIC void	S_more_xiv(pTHX);
-STATIC void	S_more_xnv(pTHX);
-STATIC void	S_more_xpv(pTHX);
-STATIC void	S_more_xpviv(pTHX);
-STATIC void	S_more_xpvnv(pTHX);
-STATIC void	S_more_xpvcv(pTHX);
-STATIC void	S_more_xpvav(pTHX);
-STATIC void	S_more_xpvhv(pTHX);
-STATIC void	S_more_xpvmg(pTHX);
-STATIC void	S_more_xpvlv(pTHX);
-STATIC void	S_more_xpvbm(pTHX);
-STATIC void	S_more_xrv(pTHX);
-STATIC XPVIV*	S_new_xiv(pTHX);
 STATIC XPVNV*	S_new_xnv(pTHX);
 STATIC XPV*	S_new_xpv(pTHX);
 STATIC XPVIV*	S_new_xpviv(pTHX);
@@ -1145,10 +2061,9 @@ 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);
@@ -1157,27 +2072,47 @@ 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)
+			__attribute__nonnull__(pTHX_2);
+
 #  ifdef DEBUGGING
 STATIC void	S_del_sv(pTHX_ SV *p);
 #  endif
 #  if !defined(NV_PRESERVES_UV)
 STATIC int	S_sv_2iuv_non_preserve(pTHX_ SV *sv, I32 numtype);
 #  endif
-STATIC I32	S_expect_number(pTHX_ char** pattern);
+STATIC I32	S_expect_number(pTHX_ char** pattern)
+			__attribute__warn_unused_result__
+			__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_init(pTHX_ SV *sv, MAGIC **mgp, STRLEN **cachep, I32 i, I32 *offsetp, U8 *s, U8 *start);
+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)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2)
+			__attribute__nonnull__(pTHX_3)
+			__attribute__nonnull__(pTHX_5)
+			__attribute__nonnull__(pTHX_7)
+			__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)
+			__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);
 #endif
@@ -1190,10 +2125,20 @@ STATIC char*	S_force_version(pTHX_ char *start, int guessing);
 STATIC char*	S_force_word(pTHX_ char *start, int token, int check_keyword, int allow_pack, int allow_tick);
 STATIC SV*	S_tokeq(pTHX_ SV *sv);
 STATIC int	S_pending_ident(pTHX);
-STATIC char*	S_scan_const(pTHX_ char *start);
-STATIC char*	S_scan_formline(pTHX_ char *s);
-STATIC char*	S_scan_heredoc(pTHX_ char *s);
-STATIC char*	S_scan_ident(pTHX_ char *s, char *send, char *dest, STRLEN destlen, I32 ck_uni);
+STATIC char*	S_scan_const(pTHX_ char *start)
+			__attribute__nonnull__(pTHX_1);
+
+STATIC char*	S_scan_formline(pTHX_ char *s)
+			__attribute__nonnull__(pTHX_1);
+
+STATIC char*	S_scan_heredoc(pTHX_ char *s)
+			__attribute__nonnull__(pTHX_1);
+
+STATIC char*	S_scan_ident(pTHX_ char *s, const char *send, char *dest, STRLEN destlen, I32 ck_uni)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2)
+			__attribute__nonnull__(pTHX_3);
+
 STATIC char*	S_scan_inputsymbol(pTHX_ char *start);
 STATIC char*	S_scan_pat(pTHX_ char *start, I32 type);
 STATIC char*	S_scan_str(pTHX_ char *start, int keep_quoted, int keep_delims);
@@ -1202,13 +2147,19 @@ STATIC char*	S_scan_trans(pTHX_ char *start);
 STATIC char*	S_scan_word(pTHX_ char *s, char *dest, STRLEN destlen, int allow_package, STRLEN *slp);
 STATIC char*	S_skipspace(pTHX_ char *s);
 STATIC char*	S_swallow_bom(pTHX_ U8 *s);
-STATIC void	S_checkcomma(pTHX_ char *s, char *name, const char *what);
+STATIC void	S_checkcomma(pTHX_ char *s, const char *name, const char *what)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2)
+			__attribute__nonnull__(pTHX_3);
+
 STATIC void	S_force_ident(pTHX_ const char *s, int kind);
 STATIC void	S_incline(pTHX_ char *s);
 STATIC int	S_intuit_method(pTHX_ char *s, GV *gv);
 STATIC int	S_intuit_more(pTHX_ char *s);
 STATIC I32	S_lop(pTHX_ I32 f, int x, char *s);
-STATIC void	S_missingterm(pTHX_ char *s) __attribute__((noreturn));
+STATIC void	S_missingterm(pTHX_ char *s)
+			__attribute__noreturn__;
+
 STATIC void	S_no_op(pTHX_ const char *what, char *s);
 STATIC void	S_set_csh(pTHX);
 STATIC I32	S_sublex_done(pTHX);
@@ -1237,8 +2188,10 @@ STATIC SV*	S_isa_lookup(pTHX_ HV *stash, const char *name, HV *name_stash, int l
 #endif
 
 #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);
 #endif
+#endif
 
 #if defined(PERL_IN_UTIL_C) || defined(PERL_DECL_PROT)
 STATIC COP*	S_closest_cop(pTHX_ COP *cop, OP *o);
@@ -1251,14 +2204,30 @@ STATIC NV	S_mulexp10(NV value, I32 exponent);
 
 START_EXTERN_C
 
-PERL_CALLCONV void	Perl_sv_setsv_flags(pTHX_ SV* dsv, SV* ssv, I32 flags);
-PERL_CALLCONV void	Perl_sv_catpvn_flags(pTHX_ SV* sv, const char* ptr, STRLEN len, I32 flags);
-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);
-PERL_CALLCONV char*	Perl_sv_pvn_force_flags(pTHX_ SV* sv, STRLEN* lp, I32 flags);
-PERL_CALLCONV char*	Perl_sv_2pv_flags(pTHX_ SV* sv, STRLEN* lp, I32 flags);
-PERL_CALLCONV void	Perl_sv_copypv(pTHX_ SV* dsv, SV* ssv);
-PERL_CALLCONV char*	Perl_my_atof2(pTHX_ const char *s, NV* value);
+PERL_CALLCONV void	Perl_sv_setsv_flags(pTHX_ SV* dsv, SV* ssv, I32 flags)
+			__attribute__nonnull__(pTHX_1);
+
+PERL_CALLCONV void	Perl_sv_catpvn_flags(pTHX_ SV* sv, const char* ptr, STRLEN len, I32 flags)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2);
+
+PERL_CALLCONV void	Perl_sv_catsv_flags(pTHX_ SV* dsv, SV* ssv, I32 flags)
+			__attribute__nonnull__(pTHX_1);
+
+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 void	Perl_sv_copypv(pTHX_ SV* dsv, SV* ssv)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2);
+
+PERL_CALLCONV char*	Perl_my_atof2(pTHX_ const char *s, NV* value)
+			__attribute__nonnull__(pTHX_1)
+			__attribute__nonnull__(pTHX_2);
+
 PERL_CALLCONV int	Perl_my_socketpair(int family, int type, int protocol, int fd[2]);
 #ifdef PERL_COPY_ON_WRITE
 PERL_CALLCONV SV*	Perl_sv_setsv_cow(pTHX_ SV* dsv, SV* ssv);
@@ -1298,7 +2267,9 @@ STATIC void	S_deb_stack_n(pTHX_ SV** stack_base, I32 stack_min, I32 stack_max, I
 
 PERL_CALLCONV PADLIST*	Perl_pad_new(pTHX_ int flags);
 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);
+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);
 #ifdef DEBUGGING
@@ -1310,6 +2281,7 @@ PERL_CALLCONV void	Perl_do_dump_pad(pTHX_ I32 level, PerlIO *file, PADLIST *padl
 PERL_CALLCONV void	Perl_pad_fixup_inner_anons(pTHX_ PADLIST *padlist, CV *old_cv, CV *new_cv);
 
 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);
@@ -1317,7 +2289,9 @@ STATIC PADOFFSET	S_pad_findlex(pTHX_ const char *name, const CV* cv, U32 seq, in
 STATIC void	S_cv_dump(pTHX_ const CV *cv, const char *title);
 #  endif
 #endif
-PERL_CALLCONV CV*	Perl_find_runcv(pTHX_ U32 *db_seqp);
+PERL_CALLCONV CV*	Perl_find_runcv(pTHX_ U32 *db_seqp)
+			__attribute__warn_unused_result__;
+
 PERL_CALLCONV void	Perl_free_tied_hv_pool(pTHX);
 #if defined(DEBUGGING)
 PERL_CALLCONV int	Perl_get_debug_opts(pTHX_ const char **s, bool givehelp);
@@ -1333,6 +2307,16 @@ STATIC HE*	S_hv_fetch_common(pTHX_ HV* tb, SV* key_sv, const char* key, STRLEN k
 PERL_CALLCONV void	Perl_hv_clear_placeholders(pTHX_ HV* hb);
 
 PERL_CALLCONV SV*	Perl_hv_scalar(pTHX_ HV* hv);
+PERL_CALLCONV I32*	Perl_hv_riter_p(pTHX_ HV* hv);
+PERL_CALLCONV HE**	Perl_hv_eiter_p(pTHX_ HV* hv);
+PERL_CALLCONV void	Perl_hv_riter_set(pTHX_ HV* hv, I32 riter);
+PERL_CALLCONV void	Perl_hv_eiter_set(pTHX_ HV* hv, HE* eiter);
+PERL_CALLCONV char**	Perl_hv_name_p(pTHX_ HV* hv);
+PERL_CALLCONV void	Perl_hv_name_set(pTHX_ HV* hv, const char *, STRLEN len, int flags);
+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 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);
@@ -1421,3 +2405,4 @@ PERL_CALLCONV bool	Perl_is_gv_magical_sv(pTHX_ SV *name, U32 flags);
 PERL_CALLCONV char*	Perl_savesvpv(pTHX_ SV* sv);
 
 END_EXTERN_C
+/* ex: set ro: */