#!/usr/bin/perl

# Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.

#

# Redistribution and use in source and binary forms, with or without

# modification, are permitted provided that the following conditions

# are met:

#

# 1.  Redistributions of source code must retain the above copyright

#     notice, this list of conditions and the following disclaimer. 

# 2.  Redistributions in binary form must reproduce the above copyright

#     notice, this list of conditions and the following disclaimer in the

#     documentation and/or other materials provided with the distribution. 

# 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of

#     its contributors may be used to endorse or promote products derived

#     from this software without specific prior written permission. 

#

# THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY

# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

# DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY

# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND

# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

# "check-for-global-initializers" script for WebKit Open Source Project

# Intended to be invoked from an Xcode build step to check if there are

# any global initializers in a target.

use warnings;

use strict;

use File::Basename;

sub touch($);

sub demangle($);

my $arch = $ENV{'CURRENT_ARCH'};

my $configuration = $ENV{'CONFIGURATION'};

my $target = $ENV{'TARGET_NAME'};

my $variant = $ENV{'CURRENT_VARIANT'};

my $coverageBuild = $ENV{'WEBKIT_COVERAGE_BUILD'};

my $debugRoot = $ENV{'WEBKIT_DEBUG_ROOT'};

$arch = $ENV{'NATIVE_ARCH'} if !$arch; # for Xcode 2.1, which does not have CURRENT_ARCH

$variant = "normal" if !$variant; # for Xcode 2.1, which does not have CURRENT_VARIANT

my $executablePath = "$ENV{'TARGET_BUILD_DIR'}/$ENV{'EXECUTABLE_PATH'}";

my $buildTimestampPath = $ENV{'TARGET_TEMP_DIR'} . "/" . basename($0) . ".timestamp";

my $buildTimestampAge = -M $buildTimestampPath;

my $scriptAge = -M $0;

my $list = $ENV{"LINK_FILE_LIST_${variant}_${arch}"};

if (!open LIST, $list) {

    print "ERROR: Could not open $list\n";

    exit 1;

}

my @files = <LIST>;

chomp @files;

close LIST;

my $sawError = 0;

for my $file (sort @files) {

    if (defined $buildTimestampAge && $buildTimestampAge < $scriptAge) {

        my $fileAge = -M $file;

        next if defined $fileAge && $fileAge > $buildTimestampAge;

    }

    if (!open NM, "(nm '$file' | sed 's/^/STDOUT:/') 2>&1 |") {

        print "ERROR: Could not open $file\n";

        $sawError = 1;

        next;

    }

    my $sawGlobal = 0;

    my @globals;

    while (<NM>) {

        if (/^STDOUT:/) {

            my $line = $_;

            if ($line =~ /__GLOBAL__I(.+)$/) {

                $sawGlobal = 1;

                push(@globals, demangle($1));

            }

        } else {

            print STDERR if $_ ne "nm: no name list\n";

        }

    }

    close NM;

    if ($sawGlobal) {

        my $shortName = $file;

        $shortName =~ s/.*\///;

        # Special cases for files that have initializers in debug builds.

        if ($configuration eq "Debug" or $variant eq "debug" or $debugRoot) {

            if ($target eq "JavaScriptCore") {

                next if $shortName eq "AllInOneFile.o";

                next if $shortName eq "Opcode.o";

                next if $shortName eq "Structure.o";

                next if $shortName eq "nodes.o";

            }

            if ($target eq "WebCore") {

                next if $shortName eq "CachedPage.o";

                next if $shortName eq "CachedResource.o";

                next if $shortName eq "Frame.o";

                next if $shortName eq "JSCustomSQLTransactionCallback.o";

                next if $shortName eq "JSLazyEventListener.o";

                next if $shortName eq "Node.o";

                next if $shortName eq "Page.o";

                next if $shortName eq "Range.o";

                next if $shortName eq "BidiRun.o";

                next if $shortName eq "RenderObject.o";

                next if $shortName eq "SubresourceLoader.o";

                next if $shortName eq "SVGElementInstance.o";

                next if $shortName eq "XMLHttpRequest.o";

            }

            if ($target eq "WebKit") {

                next if $shortName eq "HostedNetscapePluginStream.o";

                next if $shortName eq "NetscapePluginInstanceProxy.o";

            }

        }

        print "ERROR: $shortName has one or more global initializers in it! ($file), near @globals\n";

        $sawError = 1;

    }

}

if ($sawError and !$coverageBuild) {

    unlink $executablePath;

    exit 1;

}

touch($buildTimestampPath);

exit 0;

sub touch($)

{

    my ($path) = @_;

    open(TOUCH, ">", $path) or die "$!";

    close(TOUCH);

}

sub demangle($)

{

    my ($symbol) = @_;

    if (!open FILT, "c++filt $symbol |") {

        print "ERROR: Could not open c++filt\n";

        return;

    }

    my $result = <FILT>;

    close FILT;

    chomp $result;

    return $result;

}