# Create global symbol declarations, transfer vector, and
# linker options files for PerlShr.
#
# Input:
# $cflags - command line qualifiers passed to cc when preprocesing perl.h
# Note: A rather simple-minded attempt is made to restore quotes to
# a /Define clause - use with care.
# $objsuffix - file type (including '.') used for object files.
# $libperl - Perl object library.
# $extnames - package names for static extensions (used to generate
# linker options file entries for boot functions)
# $rtlopt - name of options file specifying RTLs to which PerlShr.Exe
# must be linked
#
# Output:
# PerlShr_Attr.Opt - linker options file which speficies that global vars
# be placed in NOSHR,WRT psects. Use when linking any object files
# against PerlShr.Exe, since cc places global vars in SHR,WRT psects
# by default.
# PerlShr_Bld.Opt - declares universal symbols for PerlShr.Exe
# Perlshr_Gbl*.Mar, Perlshr_Gbl*.Obj (VAX only) - declares global symbols
# for global vars (done here because gcc can't globaldef) and creates
# transfer vectors for routines on a VAX.
# PerlShr_Gbl.Opt (VAX only) - list of PerlShr_Gbl*.Obj, used for input
# to the linker when building PerlShr.Exe.
#
# To do:
# - figure out a good way to collect global vars in one psect, given that
# we can't use globaldef because of gcc.
# - then, check for existing files and preserve symbol and transfer vector
# order for upward compatibility
# - then, add GSMATCH to options file - but how do we insure that new
# library has everything old one did
# (i.e. /Define=DEBUGGING,EMBED,MULTIPLICITY)?
#
# Author: Charles Bailey bailey@genetics.upenn.edu
require 5.000;
$debug = $ENV{'GEN_SHRFLS_DEBUG'};
print "gen_shrfls.pl Rev. 14-Dec-1997\n" if $debug;
if ($ARGV[0] eq '-f') {
open(INP,$ARGV[1]) or die "Can't read input file $ARGV[1]: $!\n";
print "Input taken from file $ARGV[1]\n" if $debug;
@ARGV = ();
while (<INP>) {
chomp;
push(@ARGV,split(/\|/,$_));
}
close INP;
print "Read input data | ",join(' | ',@ARGV)," |\n" if $debug > 1;
}
$cc_cmd = shift @ARGV;
# Someday, we'll have $GetSyI built into perl . . .
$isvax = `\$ Write Sys\$Output F\$GetSyI(\"HW_MODEL\")` <= 1024;
print "\$isvax: \\$isvax\\\n" if $debug;
print "Input \$cc_cmd: \\$cc_cmd\\\n" if $debug;
$docc = ($cc_cmd !~ /^~~/);
print "\$docc = $docc\n" if $debug;
if ($docc) {
if (-f 'perl.h') { $dir = '[]'; }
elsif (-f '[-]perl.h') { $dir = '[-]'; }
else { die "$0: Can't find perl.h\n"; }
# Go see if debugging is enabled in config.h
$config = $dir . "config.h";
open CONFIG, "< $config";
while(<CONFIG>) {
$debugging_enabled++ if /define\s+DEBUGGING/;
$hide_mymalloc++ if /define\s+EMBEDMYMALLOC/;
$use_mymalloc++ if /define\s+MYMALLOC/;
}
# put quotes back onto defines - they were removed by DCL on the way in
if (($prefix,$defines,$suffix) =
($cc_cmd =~ m#(.*)/Define=(.*?)([/\s].*)#i)) {
$defines =~ s/^\((.*)\)$/$1/;
$debugging_enabled ||= $defines =~ /\bDEBUGGING\b/;
@defines = split(/,/,$defines);
$cc_cmd = "$prefix/Define=(" . join(',',grep($_ = "\"$_\"",@defines))
. ')' . $suffix;
}
print "Filtered \$cc_cmd: \\$cc_cmd\\\n" if $debug;
# check for gcc - if present, we'll need to use MACRO hack to
# define global symbols for shared variables
$isvaxc = 0;
$isgcc = `$cc_cmd _nla0:/Version` =~ /GNU/
or 0; # make debug output nice
$isvaxc = (!$isgcc && $isvax &&
# Check exit status too, in case message is shut off
(`$cc_cmd /prefix=all _nla0:` =~ /IVQUAL/ || $? == 0x38240))
or 0; # again, make debug output nice
print "\$isgcc: $isgcc\n" if $debug;
print "\$isvaxc: $isvaxc\n" if $debug;
print "\$debugging_enabled: $debugging_enabled\n" if $debug;
}
else {
($junk,$junk,$cpp_file,$cc_cmd) = split(/~~/,$cc_cmd,4);
$isgcc = $cc_cmd =~ /case_hack/i
or 0; # for nice debug output
$isvaxc = (!$isgcc && $cc_cmd !~ /standard=/i)
or 0; # again, for nice debug output
$debugging_enabled = $cc_cmd =~ /\bdebugging\b/i;
print "\$isgcc: \\$isgcc\\\n" if $debug;
print "\$isvaxc: \\$isvaxc\\\n" if $debug;
print "\$debugging_enabled: \\$debugging_enabled\\\n" if $debug;
print "Not running cc, preprocesor output in \\$cpp_file\\\n" if $debug;
}
$objsuffix = shift @ARGV;
print "\$objsuffix: \\$objsuffix\\\n" if $debug;
$dbgprefix = shift @ARGV;
print "\$dbgprefix: \\$dbgprefix\\\n" if $debug;
$olbsuffix = shift @ARGV;
print "\$olbsuffix: \\$olbsuffix\\\n" if $debug;
$libperl = "${dbgprefix}libperl$olbsuffix";
$extnames = shift @ARGV;
print "\$extnames: \\$extnames\\\n" if $debug;
$rtlopt = shift @ARGV;
print "\$rtlopt: \\$rtlopt\\\n" if $debug;
# This part gets tricky. VAXC creates global symbols for each of the
# constants in an enum if that enum is ever used as the data type of a
# global[dr]ef. We have to detect enums which are used in this way, so we
# can set up the constants as universal symbols, since anything which
# #includes perl.h will want to resolve these global symbols.
# We're using a weak test here - we basically know that the only enums
# we need to handle now are the big one in opcode.h, and the
# "typedef enum { ... } expectation" in perl.h, so we hard code
# appropriate tests below. Since we can't know in general whether a given
# enum will be used elsewhere in a globaldef, it's hard to decide a
# priori whether its constants need to be treated as global symbols.
sub scan_enum {
my($line) = @_;
return unless $isvaxc;
return unless /^\s+(OP|X)/; # we only want opcode and expectation enums
print "\tchecking for enum constant\n" if $debug > 1;
$line =~ s#/\*.+##;
$line =~ s/,?\s*\n?$//;
print "\tfiltered to \\$line\\\n" if $debug > 1;
if ($line =~ /(\w+)$/) {
print "\tconstant name is \\$1\\\n" if $debug > 1;
$enums{$1}++;
}
}
sub scan_var {
my($line) = @_;
my($const) = $line =~ /^EXTCONST/;
print "\tchecking for global variable\n" if $debug > 1;
$line =~ s/\s*EXT/EXT/;
$line =~ s/INIT\s*\(.*\)//;
$line =~ s/\[.*//;
$line =~ s/=.*//;
$line =~ s/\W*;?\s*$//;
$line =~ s/\W*\)\s*\(.*$//; # closing paren for args stripped in previous stmt
print "\tfiltered to \\$line\\\n" if $debug > 1;
if ($line =~ /(\w+)$/) {
print "\tvar name is \\$1\\" . ($const ? ' (const)' : '') . "\n" if $debug > 1;
if ($const) { $cvars{$1}++; }
else { $vars{$1}++; }
}
if ($isvaxc) {
my($type) = $line =~ /^\s*EXT\w*\s+(\w+)/;
print "\tchecking for use of enum (type is \"$type\")\n" if $debug > 2;
if ($type eq 'expectation') {
$used_expectation_enum++;
print "\tsaw global use of enum \"expectation\"\n" if $debug > 1;
}
if ($type eq 'opcode') {
$used_opcode_enum++;
print "\tsaw global use of enum \"opcode\"\n" if $debug > 1;
}
}
}
sub scan_func {
my($line) = @_;
print "\tchecking for global routine\n" if $debug > 1;
if ( $line =~ /(\w+)\s+\(/ ) {
print "\troutine name is \\$1\\\n" if $debug > 1;
if ($1 eq 'main' || $1 eq 'perl_init_ext') {
print "\tskipped\n" if $debug > 1;
}
else { $fcns{$1}++ }
}
}
# Go add some right up front if we need 'em
if ($use_mymalloc) {
$fcns{'Perl_malloc'}++;
$fcns{'Perl_calloc'}++;
$fcns{'Perl_realloc'}++;
$fcns{'Perl_myfree'}++;
}
$used_expectation_enum = $used_opcode_enum = 0; # avoid warnings
if ($docc) {
open(CPP,"${cc_cmd}/NoObj/PreProc=Sys\$Output ${dir}perl.h|")
or die "$0: Can't preprocess ${dir}perl.h: $!\n";
}
else {
open(CPP,"$cpp_file") or die "$0: Can't read preprocessed file $cpp_file: $!\n";
}
%checkh = map { $_,1 } qw( thread bytecode byterun proto );
$ckfunc = 0;
LINE: while (<CPP>) {
while (/^#.*vmsish\.h/i .. /^#.*perl\.h/i) {
while (/__VMS_PROTOTYPES__/i .. /__VMS_SEPYTOTORP__/i) {
print "vms_proto>> $_" if $debug > 2;
if (/^\s*EXT/) { &scan_var($_); }
else { &scan_func($_); }
last LINE unless defined($_ = <CPP>);
}
print "vmsish.h>> $_" if $debug > 2;
if (/^\s*EXT/) { &scan_var($_); }
last LINE unless defined($_ = <CPP>);
}
while (/^#.*opcode\.h/i .. /^#.*perl\.h/i) {
print "opcode.h>> $_" if $debug > 2;
if (/^OP \*\s/) { &scan_func($_); }
if (/^\s*EXT/) { &scan_var($_); }
if (/^\s+OP_/) { &scan_enum($_); }
last LINE unless defined($_ = <CPP>);
}
while (/^typedef enum/ .. /^\s*\}/) {
print "global enum>> $_" if $debug > 2;
&scan_enum($_);
last LINE unless defined($_ = <CPP>);
}
# Check for transition to new header file
if (/^# \d+ "(\S+)"/) {
my $spec = $1;
# Pull name from library module or header filespec
$spec =~ /^(\w+)$/ or $spec =~ /(\w+)\.h/i;
my $name = lc $1;
$ckfunc = exists $checkh{$name} ? 1 : 0;
$scanname = $name if $ckfunc;
print "Header file transition: ckfunc = $ckfunc for $name.h\n" if $debug > 1;
}
if ($ckfunc) {
print "$scanname>> $_" if $debug > 2;
if (/\s*^EXT/) { &scan_var($_); }
else { &scan_func($_); }
}
else {
print $_ if $debug > 3 && ($debug > 5 || length($_));
if (/^\s*EXT/) { &scan_var($_); }
}
}
close CPP;
# Kluge to determine whether we need to add EMBED prefix to
# symbols read from local list. vmsreaddirversions() is a VMS-
# specific function whose Perl_ prefix is added in vmsish.h
# if EMBED is #defined.
$embed = exists($fcns{'Perl_vmsreaddirversions'}) ? 'Perl_' : '';
while (<DATA>) {
next if /^#/;
s/\s+#.*\n//;
next if /^\s*$/;
($key,$array) = split('=',$_);
$key = "$embed$key";
print "Adding $key to \%$array list\n" if $debug > 1;
${$array}{$key}++;
}
if ($debugging_enabled and $isgcc) { $vars{'colors'}++ }
foreach (split /\s+/, $extnames) {
my($pkgname) = $_;
$pkgname =~ s/::/__/g;
$fcns{"boot_$pkgname"}++;
print "Adding boot_$pkgname to \%fcns (for extension $_)\n" if $debug;
}
# If we're using VAXC, fold in the names of the constants for enums
# we've seen as the type of global vars.
if ($isvaxc) {
foreach (keys %enums) {
if (/^OP/) {
$vars{$_}++ if $used_opcode_enum;
next;
}
if (/^X/) {
$vars{$_}++ if $used_expectation_enum;
next;
}
print STDERR "Unrecognized enum constant \"$_\" ignored\n";
}
}
elsif ($isgcc) {
# gcc creates this as a SHR,WRT psect in globals.c, but we
# don't see it in the perl.h scan, since it's only declared
# if DOINIT is #defined. Bleah. It's cheaper to just add
# it by hand than to add /Define=DOINIT to the preprocessing
# run and wade through all the extra junk.
$vars{"${embed}Error"}++;
}
# Eventually, we'll check against existing copies here, so we can add new
# symbols to an existing options file in an upwardly-compatible manner.
$marord++;
open(OPTBLD,">${dir}${dbgprefix}perlshr_bld.opt")
or die "$0: Can't write to ${dir}${dbgprefix}perlshr_bld.opt: $!\n";
if ($isvax) {
open(MAR,">${dir}perlshr_gbl${marord}.mar")
or die "$0: Can't write to ${dir}perlshr_gbl${marord}.mar: $!\n";
print MAR "\t.title perlshr_gbl$marord\n";
}
unless ($isgcc) {
print OPTBLD "PSECT_ATTR=\$GLOBAL_RO_VARS,PIC,NOEXE,RD,NOWRT,SHR\n";
print OPTBLD "PSECT_ATTR=\$GLOBAL_RW_VARS,PIC,NOEXE,RD,WRT,NOSHR\n";
}
foreach $var (sort (keys %vars,keys %cvars)) {
if ($isvax) { print OPTBLD "UNIVERSAL=$var\n"; }
else { print OPTBLD "SYMBOL_VECTOR=($var=DATA)\n"; }
# This hack brought to you by the lack of a globaldef in gcc.
if ($isgcc) {
if ($count++ > 200) { # max 254 psects/file
print MAR "\t.end\n";
close MAR;
$marord++;
open(MAR,">${dir}perlshr_gbl${marord}.mar")
or die "$0: Can't write to ${dir}perlshr_gbl${marord}.mar: $!\n";
print MAR "\t.title perlshr_gbl$marord\n";
$count = 0;
}
print MAR "\t.psect ${var},long,pic,ovr,rd,wrt,noexe,noshr\n";
print MAR "\t${var}:: .blkl 1\n";
}
}
print MAR "\t.psect \$transfer_vec,pic,rd,nowrt,exe,shr\n" if ($isvax);
foreach $func (sort keys %fcns) {
if ($isvax) {
print MAR "\t.transfer $func\n";
print MAR "\t.mask $func\n";
print MAR "\tjmp G\^${func}+2\n";
}
else { print OPTBLD "SYMBOL_VECTOR=($func=PROCEDURE)\n"; }
}
if ($isvax) {
print MAR "\t.end\n";
close MAR;
}
open(OPTATTR,">${dir}perlshr_attr.opt")
or die "$0: Can't write to ${dir}perlshr_attr.opt: $!\n";
if ($isvaxc) {
print OPTATTR "PSECT_ATTR=\$CHAR_STRING_CONSTANTS,PIC,SHR,NOEXE,RD,NOWRT\n";
}
elsif ($isgcc) {
foreach $var (sort keys %cvars) {
print OPTATTR "PSECT_ATTR=${var},PIC,OVR,RD,NOEXE,NOWRT,SHR\n";
}
foreach $var (sort keys %vars) {
print OPTATTR "PSECT_ATTR=${var},PIC,OVR,RD,NOEXE,WRT,NOSHR\n";
}
}
else {
print OPTATTR "! No additional linker directives are needed when using DECC\n";
}
close OPTATTR;
$incstr = 'perl,globals';
if ($isvax) {
$drvrname = "Compile_shrmars.tmp_".time;
open (DRVR,">$drvrname") or die "$0: Can't write to $drvrname: $!\n";
print DRVR "\$ Set NoOn\n";
print DRVR "\$ Delete/NoLog/NoConfirm $drvrname;\n";
print DRVR "\$ old_proc_vfy = F\$Environment(\"VERIFY_PROCEDURE\")\n";
print DRVR "\$ old_img_vfy = F\$Environment(\"VERIFY_IMAGE\")\n";
print DRVR "\$ MCR $^X -e \"\$ENV{'LIBPERL_RDT'} = (stat('$libperl'))[9]\"\n";
print DRVR "\$ Set Verify\n";
print DRVR "\$ If F\$Search(\"$libperl\").eqs.\"\" Then Library/Object/Create $libperl\n";
do {
push(@symfiles,"perlshr_gbl$marord");
print DRVR "\$ Macro/NoDebug/Object=PerlShr_Gbl${marord}$objsuffix PerlShr_Gbl$marord.Mar\n";
print DRVR "\$ Library/Object/Replace/Log $libperl PerlShr_Gbl${marord}$objsuffix\n";
} while (--$marord);
# We had to have a working miniperl to run this program; it's probably the
# one we just built. It depended on LibPerl, which will be changed when
# the PerlShr_Gbl* modules get inserted, so miniperl will be out of date,
# and so, therefore, will all of its dependents . . .
# We touch LibPerl here so it'll be back 'in date', and we won't rebuild
# miniperl etc., and therefore LibPerl, the next time we invoke MM[KS].
print DRVR "\$ old_proc_vfy = F\$Verify(old_proc_vfy,old_img_vfy)\n";
print DRVR "\$ MCR $^X -e \"utime 0, \$ENV{'LIBPERL_RDT'}, '$libperl'\"\n";
close DRVR;
}
# Initial hack to permit building of compatible shareable images for a
# given version of Perl.
if ($ENV{PERLSHR_USE_GSMATCH}) {
my $major = int($] * 1000) & 0xFF; # range 0..255
my $minor = int(($] * 1000 - $major) * 100 + 0.5) & 0xFF; # range 0..255
print OPTBLD "GSMATCH=LEQUAL,$major,$minor\n";
print OPTBLD 'CLUSTER=$$TRANSFER_VECTOR,,',
map(",$_$objsuffix",@symfiles), "\n";
}
elsif (@symfiles) { $incstr .= ',' . join(',',@symfiles); }
# Include object modules and RTLs in options file
# Linker wants /Include and /Library on different lines
print OPTBLD "$libperl/Include=($incstr)\n";
print OPTBLD "$libperl/Library\n";
open(RTLOPT,$rtlopt) or die "$0: Can't read options file $rtlopt: $!\n";
while (<RTLOPT>) { print OPTBLD; }
close RTLOPT;
close OPTBLD;
exec "\$ \@$drvrname" if $isvax;
__END__
# Oddball cases, so we can keep the perl.h scan above simple
regkind=vars # declared in regcomp.h
simple=vars # declared in regcomp.h
varies=vars # declared in regcomp.h
watchaddr=vars # declared in run.c
watchok=vars # declared in run.c
yychar=vars # generated by byacc in perly.c
yycheck=vars # generated by byacc in perly.c
yydebug=vars # generated by byacc in perly.c
yydefred=vars # generated by byacc in perly.c
yydgoto=vars # generated by byacc in perly.c
yyerrflag=vars # generated by byacc in perly.c
yygindex=vars # generated by byacc in perly.c
yylen=vars # generated by byacc in perly.c
yylhs=vars # generated by byacc in perly.c
yylval=vars # generated by byacc in perly.c
yyname=vars # generated by byacc in perly.c
yynerrs=vars # generated by byacc in perly.c
yyrindex=vars # generated by byacc in perly.c
yyrule=vars # generated by byacc in perly.c
yysindex=vars # generated by byacc in perly.c
yytable=vars # generated by byacc in perly.c
yyval=vars # generated by byacc in perly.c