#!/usr/bin/env perl # # %CopyrightBegin% # # Copyright Ericsson AB 1999-2012. All Rights Reserved. # # The contents of this file are subject to the Erlang Public License, # Version 1.1, (the "License"); you may not use this file except in # compliance with the License. You should have received a copy of the # Erlang Public License along with this software. If not, it can be # retrieved online at http://www.erlang.org/. # # Software distributed under the License is distributed on an "AS IS" # basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See # the License for the specific language governing rights and limitations # under the License. # # %CopyrightEnd% # use strict; use File::Basename; # # Description: # Packages one erlang module in a form that can be preloaded (C source # for Unix or resource script for Windows). The output is written to # standard output. # # Usage: # make_preload [ Options ] file.{jam,beam} # # Options: # -rc Produce a resource script rather than C source. # # Author: # Bjorn Gustavsson # my $gen_rc = 0; my $gen_old = 0; my $windres = 0; my $msys = 0; my $file; my $progname = basename($0); while (@ARGV && $ARGV[0] =~ /^-(\w+)/) { my $opt = shift; if ($opt eq '-rc') { $gen_rc = 1; } elsif ($opt eq '-windres') { $windres = 1; } elsif ($opt eq '-msys') { $msys = 1; } elsif ($opt eq '-old') { $gen_old = 1; } else { usage("bad option: $opt"); } } print header(); my @modules; my $num = 1; foreach $file (@ARGV) { local($/); usage("not a beam file") unless $file =~ /\.beam$/; my $module = basename($file, ".beam"); if ($gen_rc) { my $win_file; if ($msys) { ($win_file) = split("\n", `(msys2win_path.sh $file)`); } else { ($win_file) = split("\n", `(cygpath -d $file 2>/dev/null || cygpath -w $file)`); } $win_file =~ s&\\&\\\\&g; print "$num ERLANG_CODE \"$win_file\"\n"; push(@modules, " ", -s $file, "L, $num, ", length($module), ",\"$module\",\n"); $num++; } else { my $i; my $comment = ''; open(FILE, $file) or error("failed to read $file: $!"); binmode(FILE); $_ = <FILE>; $_ = beam_strip($_); close(FILE); push(@modules, " {\"$module\", " . length($_) . ", preloaded_$module},\n"); print "unsigned preloaded_size_$module = ", length($_), ";\n"; print "unsigned char preloaded_$module", "[] = {\n"; for ($i = 0; $i < length($_); $i++) { if ($i % 8 == 0 && $comment ne '') { $comment =~ s@/\*@..@g; # Comment start -- avoid warning. $comment =~ s@\*/@..@g; # Comment terminator. print " /* $comment */\n "; $comment = ''; } my $c = ord(substr($_, $i, 1)); printf("0x%02x,", $c); $comment .= (32 <= $c && $c < 127) ? chr($c) : '.'; } $comment =~ s@\*/@..@g; # Comment terminator. print " " x (8-($i % 8)), " /* $comment */\n};\n"; } } if ($windres) { $modules[$#modules] =~ s/,$//; } if ($gen_rc) { print "#include <beam.rc>\n"; $num--; print "\n0 ERLANG_DICT\n"; print "BEGIN\n"; print " $num,\n"; print @modules; print "END\n"; } elsif ($gen_old) { print "struct {\n"; print " char* name;\n"; print " int size;\n"; print " unsigned char* code;\n"; print "} pre_loaded[] = {\n"; foreach (@modules) { print; } print " {0, 0, 0}\n"; print "};\n"; } sub usage { warn "$progname: ", @_, "\n"; die "usage: $progname -o output-directory file.{jam,beam}\n"; } sub error { die "$progname: ", @_, "\n"; } sub beam_strip { my($beam) = @_; my $size_left = length($beam); my %chunk; my %needed_chunk = ('Code' => 1, 'Atom' => 1, 'ImpT' => 1, 'ExpT' => 1, 'StrT' => 1, 'FunT' => 1, 'LitT' => 1); die "can't read Beam files for OTP R4 or earlier (sorry)" if $beam =~ /^\x7fBEAM!/; # # Read and verify the head of the IFF file. # my ($id, $size, $beam_id) = unpack("a4Na4", $beam); return $beam # It might be compressed. unless $id eq 'FOR1'; # die "not a BEAM file: no IFF 'FOR1' chunk" # unless $id eq 'FOR1'; $size_left -= 8; die "form size $size greater than size ", $size_left, " of module" if $size > $size_left; $size_left -= 4; die "not a BEAM file: IFF form type is not 'BEAM'" unless $beam_id eq 'BEAM'; # # Read all IFF chunks. # $beam = substr($beam, 12, $size_left); while ($size_left > 0) { ($id, $size) = unpack("a4N", $beam); $size_left -= 8; die "chunk size $size greater than size ", $size_left, " of module" if $size > $size_left; $size = 4*int(($size+3)/4); $chunk{$id} = substr($beam, 0, 8+$size); $beam = substr($beam, 8+$size); $size_left = length($beam); } # # Create a new beam file with only the useful chunk types. # my @chunks; foreach (sort keys %chunk) { push(@chunks, $chunk{$_}) if $needed_chunk{$_}; } $beam = join('', @chunks); join('', "FOR1", pack("N", length($beam)+4), "BEAM", $beam); } sub header { my $time = localtime; <<END; /* * DO NOT EDIT THIS FILE. It was automatically generated * by the `$progname' program on $time. */ END }