#!/usr/bin/perl -w # # Regenerate (overwriting only if changed): # # embed.h # embedvar.h # global.sym # perlapi.c # perlapi.h # proto.h # # from information stored in # # embed.fnc # intrpvar.h # perlvars.h # regen/opcodes # # Accepts the standard regen_lib -q and -v args. # # This script is normally invoked from regen.pl. require 5.004; # keep this compatible, an old perl is all we may have before # we build the new one use strict; BEGIN { # Get function prototypes require 'regen/regen_lib.pl'; } my $SPLINT = 0; # Turn true for experimental splint support http://www.splint.org my $unflagged_pointers; # # See database of global and static function prototypes in embed.fnc # This is used to generate prototype headers under various configurations, # export symbols lists for different platforms, and macros to provide an # implicit interpreter context argument. # sub do_not_edit ($) { my $file = shift; return read_only_top(lang => ($file =~ /\.[ch]$/ ? 'C' : 'Perl'), file => $file, style => '*', by => 'regen/embed.pl', from => ['data in embed.fnc', 'regen/embed.pl', 'regen/opcodes', 'intrpvar.h', 'perlvars.h'], final => "\nEdit those files and run 'make regen_headers' to effect changes.\n", copyright => [1993 .. 2009]); } # do_not_edit open IN, "embed.fnc" or die $!; my @embed; my (%has_va, %has_nocontext); while () { chomp; next if /^:/; next if /^$/; while (s|\\$||) { $_ .= ; chomp; } s/\s+$//; my @args; if (/^\s*(#|$)/) { @args = $_; } else { @args = split /\s*\|\s*/, $_; my $func = $args[2]; if ($func) { ++$has_va{$func} if $args[-1] =~ /\.\.\./; ++$has_nocontext{$1} if $func =~ /(.*)_nocontext/; } } if (@args == 1 && $args[0] !~ /^#\s*(?:if|ifdef|ifndef|else|endif)/) { die "Illegal line $. '$args[0]' in embed.fnc"; } push @embed, \@args; } open IN, 'regen/opcodes' or die $!; { my %syms; while () { chop; next unless $_; next if /^#/; my (undef, undef, $check) = split /\t+/, $_; ++$syms{$check}; } foreach (keys %syms) { # These are all indirectly referenced by globals.c. push @embed, ['pR', 'OP *', $_, 'NN OP *o']; } } close IN; my (@core, @ext, @api); { # Cluster entries in embed.fnc that have the same #ifdef guards. # Also, split out at the top level the three classes of functions. my @state; my %groups; my $current; foreach (@embed) { if (@$_ > 1) { push @$current, $_; next; } $_->[0] =~ s/^#\s+/#/; $_->[0] =~ /^\S*/; $_->[0] =~ s/^#ifdef\s+(\S+)/#if defined($1)/; $_->[0] =~ s/^#ifndef\s+(\S+)/#if !defined($1)/; if ($_->[0] =~ /^#if\s*(.*)/) { push @state, $1; } elsif ($_->[0] =~ /^#else\s*$/) { die "Unmatched #else in embed.fnc" unless @state; $state[-1] = "!($state[-1])"; } elsif ($_->[0] =~ m!^#endif\s*(?:/\*.*\*/)?$!) { die "Unmatched #endif in embed.fnc" unless @state; pop @state; } else { die "Unhandled pre-processor directive '$_->[0]' in embed.fnc"; } $current = \%groups; # Nested #if blocks are effectively &&ed together # For embed.fnc, ordering withing the && isn't relevant, so we can # sort them to try to group more functions together. my @sorted = sort @state; while (my $directive = shift @sorted) { $current->{$directive} ||= {}; $current = $current->{$directive}; } $current->{''} ||= []; $current = $current->{''}; } sub add_level { my ($level, $indent, $wanted) = @_; my $funcs = $level->{''}; my @entries; if ($funcs) { if (!defined $wanted) { @entries = @$funcs; } else { foreach (@$funcs) { if ($_->[0] =~ /A/) { push @entries, $_ if $wanted eq 'A'; } elsif ($_->[0] =~ /E/) { push @entries, $_ if $wanted eq 'E'; } else { push @entries, $_ if $wanted eq ''; } } } @entries = sort {$a->[2] cmp $b->[2]} @entries; } foreach (sort grep {length $_} keys %$level) { my @conditional = add_level($level->{$_}, $indent . ' ', $wanted); push @entries, ["#${indent}if $_"], @conditional, ["#${indent}endif"] if @conditional; } return @entries; } @core = add_level(\%groups, '', ''); @ext = add_level(\%groups, '', 'E'); @api = add_level(\%groups, '', 'A'); @embed = add_level(\%groups, ''); } # walk table providing an array of components in each line to # subroutine, printing the result sub walk_table (&@) { my ($function, $filename) = @_; my $F; if (ref $filename) { # filehandle $F = $filename; } else { $F = safer_open("$filename-new", $filename); print $F do_not_edit ($filename); } foreach (@embed) { my @outs = &{$function}(@$_); # $function->(@args) is not 5.003 print $F @outs; } unless (ref $filename) { read_only_bottom_close_and_rename($F); } } # generate proto.h { my $pr = safer_open('proto.h-new', 'proto.h'); print $pr do_not_edit ("proto.h"), "START_EXTERN_C\n"; my $ret; foreach (@embed) { if (@$_ == 1) { print $pr "$_->[0]\n"; next; } my ($flags,$retval,$plain_func,@args) = @$_; my @nonnull; my $has_context = ( $flags !~ /n/ ); my $never_returns = ( $flags =~ /r/ ); my $commented_out = ( $flags =~ /m/ ); my $binarycompat = ( $flags =~ /b/ ); my $is_malloc = ( $flags =~ /a/ ); my $can_ignore = ( $flags !~ /R/ ) && !$is_malloc; my @names_of_nn; my $func; my $splint_flags = ""; if ( $SPLINT && !$commented_out ) { $splint_flags .= '/*@noreturn@*/ ' if $never_returns; if ($can_ignore && ($retval ne 'void') && ($retval !~ /\*/)) { $retval .= " /*\@alt void\@*/"; } } if ($flags =~ /([si])/) { my $type = ($1 eq 's') ? "STATIC" : "PERL_STATIC_INLINE"; warn "$func: i and s flags are mutually exclusive" if $flags =~ /s/ && $flags =~ /i/; $retval = "$type $splint_flags$retval"; $func = "S_$plain_func"; } else { $retval = "PERL_CALLCONV $splint_flags$retval"; if ($flags =~ /[bp]/) { $func = "Perl_$plain_func"; } else { $func = $plain_func; } } $ret = "$retval\t$func("; if ( $has_context ) { $ret .= @args ? "pTHX_ " : "pTHX"; } if (@args) { my $n; for my $arg ( @args ) { ++$n; if ( $arg =~ /\*/ && $arg !~ /\b(NN|NULLOK)\b/ ) { warn "$func: $arg needs NN or NULLOK\n"; ++$unflagged_pointers; } my $nn = ( $arg =~ s/\s*\bNN\b\s+// ); push( @nonnull, $n ) if $nn; my $nullok = ( $arg =~ s/\s*\bNULLOK\b\s+// ); # strip NULLOK with no effect # Make sure each arg has at least a type and a var name. # An arg of "int" is valid C, but want it to be "int foo". my $temp_arg = $arg; $temp_arg =~ s/\*//g; $temp_arg =~ s/\s*\bstruct\b\s*/ /g; if ( ($temp_arg ne "...") && ($temp_arg !~ /\w+\s+(\w+)(?:\[\d+\])?\s*$/) ) { warn "$func: $arg ($n) doesn't have a name\n"; } if ( $SPLINT && $nullok && !$commented_out ) { $arg = '/*@null@*/ ' . $arg; } if (defined $1 && $nn && !($commented_out && !$binarycompat)) { push @names_of_nn, $1; } } $ret .= join ", ", @args; } else { $ret .= "void" if !$has_context; } $ret .= ")"; my @attrs; if ( $flags =~ /r/ ) { push @attrs, "__attribute__noreturn__"; } if ( $flags =~ /D/ ) { push @attrs, "__attribute__deprecated__"; } if ( $is_malloc ) { push @attrs, "__attribute__malloc__"; } if ( !$can_ignore ) { push @attrs, "__attribute__warn_unused_result__"; } if ( $flags =~ /P/ ) { push @attrs, "__attribute__pure__"; } if( $flags =~ /f/ ) { my $prefix = $has_context ? 'pTHX_' : ''; my $args = scalar @args; my $pat = $args - 1; my $macro = @nonnull && $nonnull[-1] == $pat ? '__attribute__format__' : '__attribute__format__null_ok__'; push @attrs, sprintf "%s(__printf__,%s%d,%s%d)", $macro, $prefix, $pat, $prefix, $args; } if ( @nonnull ) { my @pos = map { $has_context ? "pTHX_$_" : $_ } @nonnull; push @attrs, map { sprintf( "__attribute__nonnull__(%s)", $_ ) } @pos; } if ( @attrs ) { $ret .= "\n"; $ret .= join( "\n", map { "\t\t\t$_" } @attrs ); } $ret .= ";"; $ret = "/* $ret */" if $commented_out; if (@names_of_nn) { $ret .= "\n#define PERL_ARGS_ASSERT_\U$plain_func\E\t\\\n\t" . join '; ', map "assert($_)", @names_of_nn; } $ret .= @attrs ? "\n\n" : "\n"; print $pr $ret; } print $pr <<'EOF'; #ifdef PERL_CORE # include "pp_proto.h" #endif END_EXTERN_C EOF read_only_bottom_close_and_rename($pr); } # generates global.sym (API export list) { my %seen; sub write_global_sym { if (@_ > 1) { my ($flags,$retval,$func,@args) = @_; if ($flags =~ /[AX]/ && $flags !~ /[xm]/ || $flags =~ /b/) { # public API, so export # If a function is defined twice, for example before and after # an #else, only export its name once. return '' if $seen{$func}++; $func = "Perl_$func" if $flags =~ /[pbX]/; return "$func\n"; } } return ''; } } warn "$unflagged_pointers pointer arguments to clean up\n" if $unflagged_pointers; walk_table(\&write_global_sym, "global.sym"); sub readvars(\%$$@) { my ($syms, $file,$pre,$keep_pre) = @_; local (*FILE, $_); open(FILE, "< $file") or die "embed.pl: Can't open $file: $!\n"; while () { s/[ \t]*#.*//; # Delete comments. if (/PERLVARA?I?S?C?\($pre(\w+)/) { my $sym = $1; $sym = $pre . $sym if $keep_pre; warn "duplicate symbol $sym while processing $file line $.\n" if exists $$syms{$sym}; $$syms{$sym} = $pre || 1; } } close(FILE); } my %intrp; my %globvar; readvars %intrp, 'intrpvar.h','I'; readvars %globvar, 'perlvars.h','G'; my $sym; sub undefine ($) { my ($sym) = @_; "#undef $sym\n"; } sub hide { my ($from, $to, $indent) = @_; $indent = '' unless defined $indent; my $t = int(length("$indent$from") / 8); "#${indent}define $from" . "\t" x ($t < 3 ? 3 - $t : 1) . "$to\n"; } sub bincompat_var ($$) { my ($pfx, $sym) = @_; my $arg = ($pfx eq 'G' ? 'NULL' : 'aTHX'); undefine("PL_$sym") . hide("PL_$sym", "(*Perl_${pfx}${sym}_ptr($arg))"); } sub multon ($$$) { my ($sym,$pre,$ptr) = @_; hide("PL_$sym", "($ptr$pre$sym)"); } sub multoff ($$) { my ($sym,$pre) = @_; return hide("PL_$pre$sym", "PL_$sym"); } my $em = safer_open('embed.h-new', 'embed.h'); print $em do_not_edit ("embed.h"), <<'END'; /* (Doing namespace management portably in C is really gross.) */ /* By defining PERL_NO_SHORT_NAMES (not done by default) the short forms * (like warn instead of Perl_warn) for the API are not defined. * Not defining the short forms is a good thing for cleaner embedding. */ #ifndef PERL_NO_SHORT_NAMES /* Hide global symbols */ END my @az = ('a'..'z'); sub embed_h { my ($guard, $funcs) = @_; print $em "$guard\n" if $guard; my $lines; foreach (@$funcs) { if (@$_ == 1) { my $cond = $_->[0]; # Indent the conditionals if we are wrapped in an #if/#endif pair. $cond =~ s/#(.*)/# $1/ if $guard; $lines .= "$cond\n"; next; } my $ret = ""; my ($flags,$retval,$func,@args) = @$_; unless ($flags =~ /[om]/) { my $args = scalar @args; if ($flags =~ /n/) { if ($flags =~ /s/) { $ret = hide($func,"S_$func"); } elsif ($flags =~ /p/) { $ret = hide($func,"Perl_$func"); } } elsif ($args and $args[$args-1] =~ /\.\.\./) { if ($flags =~ /p/) { # we're out of luck for varargs functions under CPP # So we can only do these macros for no implicit context: $ret = "#ifndef PERL_IMPLICIT_CONTEXT\n" . hide($func,"Perl_$func") . "#endif\n"; } } else { my $alist = join(",", @az[0..$args-1]); $ret = "#define $func($alist)"; my $t = int(length($ret) / 8); $ret .= "\t" x ($t < 4 ? 4 - $t : 1); if ($flags =~ /[si]/) { $ret .= "S_$func(aTHX"; } elsif ($flags =~ /p/) { $ret .= "Perl_$func(aTHX"; } $ret .= "_ " if $alist; $ret .= $alist . ")\n"; } } $lines .= $ret; } # Prune empty #if/#endif pairs. while ($lines =~ s/#\s*if[^\n]+\n#\s*endif\n//) { } # Merge adjacent blocks. while ($lines =~ s/(#ifndef PERL_IMPLICIT_CONTEXT [^\n]+ )#endif #ifndef PERL_IMPLICIT_CONTEXT /$1/) { } print $em $lines; print $em "#endif\n" if $guard; } embed_h('', \@api); embed_h('#if defined(PERL_CORE) || defined(PERL_EXT)', \@ext); embed_h('#ifdef PERL_CORE', \@core); print $em <<'END'; #endif /* #ifndef PERL_NO_SHORT_NAMES */ /* Compatibility stubs. Compile extensions with -DPERL_NOCOMPAT to disable them. */ #if !defined(PERL_CORE) # define sv_setptrobj(rv,ptr,name) sv_setref_iv(rv,name,PTR2IV(ptr)) # define sv_setptrref(rv,ptr) sv_setref_iv(rv,NULL,PTR2IV(ptr)) #endif #if !defined(PERL_CORE) && !defined(PERL_NOCOMPAT) /* Compatibility for various misnamed functions. All functions in the API that begin with "perl_" (not "Perl_") take an explicit interpreter context pointer. The following are not like that, but since they had a "perl_" prefix in previous versions, we provide compatibility macros. */ # define perl_atexit(a,b) call_atexit(a,b) END walk_table { my ($flags,$retval,$func,@args) = @_; return unless $func; return unless $flags =~ /O/; my $alist = join ",", @az[0..$#args]; my $ret = "# define perl_$func($alist)"; my $t = (length $ret) >> 3; $ret .= "\t" x ($t < 5 ? 5 - $t : 1); "$ret$func($alist)\n"; } $em; print $em <<'END'; /* varargs functions can't be handled with CPP macros. :-( This provides a set of compatibility functions that don't take an extra argument but grab the context pointer using the macro dTHX. */ #if defined(PERL_IMPLICIT_CONTEXT) && !defined(PERL_NO_SHORT_NAMES) END foreach (sort keys %has_va) { next unless $has_nocontext{$_}; next if /printf/; # Not clear to me why these are skipped but they are. print $em hide($_, "Perl_${_}_nocontext", " "); } print $em <<'END'; #endif #endif /* !defined(PERL_CORE) && !defined(PERL_NOCOMPAT) */ #if !defined(PERL_IMPLICIT_CONTEXT) /* undefined symbols, point them back at the usual ones */ END foreach (sort keys %has_va) { next unless $has_nocontext{$_}; next if /printf/; # Not clear to me why these are skipped but they are. print $em hide("Perl_${_}_nocontext", "Perl_$_", " "); } print $em <<'END'; #endif END read_only_bottom_close_and_rename($em); $em = safer_open('embedvar.h-new', 'embedvar.h'); print $em do_not_edit ("embedvar.h"), <<'END'; /* (Doing namespace management portably in C is really gross.) */ /* The following combinations of MULTIPLICITY and PERL_IMPLICIT_CONTEXT are supported: 1) none 2) MULTIPLICITY # supported for compatibility 3) MULTIPLICITY && PERL_IMPLICIT_CONTEXT All other combinations of these flags are errors. only #3 is supported directly, while #2 is a special case of #3 (supported by redefining vTHX appropriately). */ #if defined(MULTIPLICITY) /* cases 2 and 3 above */ # if defined(PERL_IMPLICIT_CONTEXT) # define vTHX aTHX # else # define vTHX PERL_GET_INTERP # endif END for $sym (sort keys %intrp) { print $em multon($sym,'I','vTHX->'); } print $em <<'END'; #else /* !MULTIPLICITY */ /* case 1 above */ END for $sym (sort keys %intrp) { print $em multoff($sym,'I'); } print $em <<'END'; END print $em <<'END'; #endif /* MULTIPLICITY */ #if defined(PERL_GLOBAL_STRUCT) END for $sym (sort keys %globvar) { print $em multon($sym, 'G','my_vars->'); print $em multon("G$sym",'', 'my_vars->'); } print $em <<'END'; #else /* !PERL_GLOBAL_STRUCT */ END for $sym (sort keys %globvar) { print $em multoff($sym,'G'); } print $em <<'END'; #endif /* PERL_GLOBAL_STRUCT */ END read_only_bottom_close_and_rename($em); my $capi = safer_open('perlapi.c-new', 'perlapi.c'); my $capih = safer_open('perlapi.h-new', 'perlapi.h'); print $capih do_not_edit ("perlapi.h"), <<'EOT'; /* declare accessor functions for Perl variables */ #ifndef __perlapi_h__ #define __perlapi_h__ #if defined (MULTIPLICITY) && defined (PERL_GLOBAL_STRUCT) START_EXTERN_C #undef PERLVAR #undef PERLVARA #undef PERLVARI #undef PERLVARIC #undef PERLVARISC #define PERLVAR(v,t) EXTERN_C t* Perl_##v##_ptr(pTHX); #define PERLVARA(v,n,t) typedef t PL_##v##_t[n]; \ EXTERN_C PL_##v##_t* Perl_##v##_ptr(pTHX); #define PERLVARI(v,t,i) PERLVAR(v,t) #define PERLVARIC(v,t,i) PERLVAR(v, const t) #define PERLVARISC(v,i) typedef const char PL_##v##_t[sizeof(i)]; \ EXTERN_C PL_##v##_t* Perl_##v##_ptr(pTHX); #include "perlvars.h" #undef PERLVAR #undef PERLVARA #undef PERLVARI #undef PERLVARIC #undef PERLVARISC END_EXTERN_C #if defined(PERL_CORE) /* accessor functions for Perl "global" variables */ /* these need to be mentioned here, or most linkers won't put them in the perl executable */ #ifndef PERL_NO_FORCE_LINK START_EXTERN_C #ifndef DOINIT EXTCONST void * const PL_force_link_funcs[]; #else EXTCONST void * const PL_force_link_funcs[] = { #undef PERLVAR #undef PERLVARA #undef PERLVARI #undef PERLVARIC #define PERLVAR(v,t) (void*)Perl_##v##_ptr, #define PERLVARA(v,n,t) PERLVAR(v,t) #define PERLVARI(v,t,i) PERLVAR(v,t) #define PERLVARIC(v,t,i) PERLVAR(v,t) #define PERLVARISC(v,i) PERLVAR(v,char) /* In Tru64 (__DEC && __osf__) the cc option -std1 causes that one * cannot cast between void pointers and function pointers without * info level warnings. The PL_force_link_funcs[] would cause a few * hundred of those warnings. In code one can circumnavigate this by using * unions that overlay the different pointers, but in declarations one * cannot use this trick. Therefore we just disable the warning here * for the duration of the PL_force_link_funcs[] declaration. */ #if defined(__DECC) && defined(__osf__) #pragma message save #pragma message disable (nonstandcast) #endif #include "perlvars.h" #if defined(__DECC) && defined(__osf__) #pragma message restore #endif #undef PERLVAR #undef PERLVARA #undef PERLVARI #undef PERLVARIC #undef PERLVARISC }; #endif /* DOINIT */ END_EXTERN_C #endif /* PERL_NO_FORCE_LINK */ #else /* !PERL_CORE */ EOT foreach $sym (sort keys %globvar) { print $capih bincompat_var('G',$sym); } print $capih <<'EOT'; #endif /* !PERL_CORE */ #endif /* MULTIPLICITY && PERL_GLOBAL_STRUCT */ #endif /* __perlapi_h__ */ EOT read_only_bottom_close_and_rename($capih); my $warning = do_not_edit ("perlapi.c"); $warning =~ s! \*/\n! * * * Up to the threshold of the door there mounted a flight of twenty-seven * broad stairs, hewn by some unknown art of the same black stone. This * was the only entrance to the tower; ... * * [p.577 of _The Lord of the Rings_, III/x: "The Voice of Saruman"] * */ !; print $capi $warning, <<'EOT'; #include "EXTERN.h" #include "perl.h" #include "perlapi.h" #if defined (MULTIPLICITY) && defined (PERL_GLOBAL_STRUCT) /* accessor functions for Perl "global" variables */ START_EXTERN_C #undef PERLVARI #define PERLVARI(v,t,i) PERLVAR(v,t) #undef PERLVAR #undef PERLVARA #define PERLVAR(v,t) t* Perl_##v##_ptr(pTHX) \ { dVAR; PERL_UNUSED_CONTEXT; return &(PL_##v); } #define PERLVARA(v,n,t) PL_##v##_t* Perl_##v##_ptr(pTHX) \ { dVAR; PERL_UNUSED_CONTEXT; return &(PL_##v); } #undef PERLVARIC #undef PERLVARISC #define PERLVARIC(v,t,i) \ const t* Perl_##v##_ptr(pTHX) \ { PERL_UNUSED_CONTEXT; return (const t *)&(PL_##v); } #define PERLVARISC(v,i) PL_##v##_t* Perl_##v##_ptr(pTHX) \ { dVAR; PERL_UNUSED_CONTEXT; return &(PL_##v); } #include "perlvars.h" #undef PERLVAR #undef PERLVARA #undef PERLVARI #undef PERLVARIC #undef PERLVARISC END_EXTERN_C #endif /* MULTIPLICITY && PERL_GLOBAL_STRUCT */ EOT read_only_bottom_close_and_rename($capi); # ex: set ts=8 sts=4 sw=4 noet: