WebKitTools/Scripts/check-for-exit-time-destructors

#!/usr/bin/perl

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#
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# modification, are permitted provided that the following conditions
# are met:
#
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#     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
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#     its contributors may be used to endorse or promote products derived
#     from this software without specific prior written permission. 
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# "check-for-exit-time-destructors" script for WebKit Open Source Project

# Intended to be invoked from an Xcode build step to check if there are
# any exit-time destructors in a target.

use warnings;
use strict;

use File::Basename;

sub touch($);
sub printFunctions($$);

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 "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 "Could not open $file\n";
        $sawError = 1;
        next;
    }
    my $sawAtExit = 0;
    while (<NM>) {
        if (/^STDOUT:/) {
            $sawAtExit = 1 if /___cxa_atexit/;
        } else {
            print STDERR if $_ ne "nm: no name list\n";
        }
    }
    close NM;
    next unless $sawAtExit;

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

    if ($target eq "WebCore") {
        next if $shortName eq "AccessibilityObject.o";
        next if $shortName eq "AccessibilityRenderObject.o";
        next if $shortName eq "ApplicationCacheStorage.o";
        next if $shortName eq "ApplyStyleCommand.o";
        next if $shortName eq "ArchiveFactory.o";
        next if $shortName eq "CSSMutableStyleDeclaration.o";
        next if $shortName eq "CSSPrimitiveValue.o";
        next if $shortName eq "CSSSelector.o";
        next if $shortName eq "CSSStyleSelector.o";
        next if $shortName eq "CachedImage.o";
        next if $shortName eq "ColorMac.o";
        next if $shortName eq "DOMImplementation.o";
        next if $shortName eq "Document.o";
        next if $shortName eq "EventHandler.o";
        next if $shortName eq "EventHandlerMac.o";
        next if $shortName eq "FTPDirectoryDocument.o";
        next if $shortName eq "FontCache.o";
        next if $shortName eq "FontCacheMac.o";
        next if $shortName eq "FormDataStreamMac.o";
        next if $shortName eq "Frame.o";
        next if $shortName eq "FrameLoader.o";
        next if $shortName eq "FrameMac.o";
        next if $shortName eq "GCController.o";
        next if $shortName eq "GraphicsContextMac.o";
        next if $shortName eq "HTMLButtonElement.o";
        next if $shortName eq "HTMLElement.o";
        next if $shortName eq "HTMLFieldSetElement.o";
        next if $shortName eq "HTMLInputElement.o";
        next if $shortName eq "HTMLInterchange.o";
        next if $shortName eq "HTMLKeygenElement.o";
        next if $shortName eq "HTMLLegendElement.o";
        next if $shortName eq "HTMLOptGroupElement.o";
        next if $shortName eq "HTMLOptionElement.o";
        next if $shortName eq "HTMLParser.o";
        next if $shortName eq "HTMLSelectElement.o";
        next if $shortName eq "HTMLTableElement.o";
        next if $shortName eq "HTMLTextAreaElement.o";
        next if $shortName eq "IconDatabase.o";
        next if $shortName eq "Image.o";
        next if $shortName eq "IndentOutdentCommand.o";
        next if $shortName eq "InspectorController.o";
        next if $shortName eq "JSDOMBinding.o";
        next if $shortName eq "JSHTMLElementWrapperFactory.o";
        next if $shortName eq "JSInspectedObjectWrapper.o";
        next if $shortName eq "JSInspectorCallbackWrapper.o";
        next if $shortName eq "JSSVGAnimatedLength.o";
        next if $shortName eq "JSSVGAnimatedRect.o";
        next if $shortName eq "JSSVGElementWrapperFactory.o";
        next if $shortName eq "JSSVGLength.o";
        next if $shortName eq "JSSVGRect.o";
        next if $shortName eq "JavaScriptDebugServer.o";
        next if $shortName eq "JavaScriptProfile.o";
        next if $shortName eq "JavaScriptProfileNode.o";
        next if $shortName eq "KURL.o";
        next if $shortName eq "LocalStorage.o";
        next if $shortName eq "NetworkStateNotifier.o";
        next if $shortName eq "Page.o";
        next if $shortName eq "PasteboardMac.o";
        next if $shortName eq "RenderBlock.o";
        next if $shortName eq "RenderCounter.o";
        next if $shortName eq "RenderFlexibleBox.o";
        next if $shortName eq "RenderLayer.o";
        next if $shortName eq "RenderListItem.o";
        next if $shortName eq "RenderScrollbarTheme.o";
        next if $shortName eq "RenderStyle.o";
        next if $shortName eq "RenderThemeMac.o";
        next if $shortName eq "ReplaceSelectionCommand.o";
        next if $shortName eq "ResourceResponseMac.o";
        next if $shortName eq "SVGAnimateMotionElement.o";
        next if $shortName eq "SVGAnimationElement.o";
        next if $shortName eq "SVGLangSpace.o";
        next if $shortName eq "SVGResource.o";
        next if $shortName eq "SVGResourceMarker.o";
        next if $shortName eq "SVGSMILElement.o";
        next if $shortName eq "SVGSVGElement.o";
        next if $shortName eq "SVGStyleElement.o";
        next if $shortName eq "SVGTextContentElement.o";
        next if $shortName eq "ScriptElement.o";
        next if $shortName eq "ScrollView.o";
        next if $shortName eq "ScrollbarThemeMac.o";
        next if $shortName eq "SecurityOrigin.o";
        next if $shortName eq "SimpleFontDataMac.o";
        next if $shortName eq "StyleTransformData.o";
        next if $shortName eq "TextEncoding.o";
        next if $shortName eq "ThemeMac.o";
        next if $shortName eq "ThreadCheck.o";
        next if $shortName eq "XMLHttpRequest.o";
        next if $shortName eq "XPathExpressionNode.o";
        next if $shortName eq "XPathParser.o";
        next if $shortName eq "XPathValue.o";
        next if $shortName eq "bidi.o";
        next if $shortName eq "htmlediting.o";
        next if $shortName eq "markup.o";
        next if $shortName eq "runtime_root.o";
    }

    if ($target eq "WebKit") {
        next if $shortName eq "AccessibilityObject.o";
        next if $shortName eq "WebBackForwardList.o";
        next if $shortName eq "WebBaseNetscapePluginStream.o";
        next if $shortName eq "WebHTMLRepresentation.o";
        next if $shortName eq "WebHistoryItem.o";
        next if $shortName eq "WebNSPasteboardExtras.o";
        next if $shortName eq "WebPasteboardHelper.o";
        next if $shortName eq "WebStringTruncator.o";
        next if $shortName eq "WebView.o";
    }

    $sawError = 1 if printFunctions($shortName, $file);
}

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 "Could not open c++filt\n";
        return;
    }
    my $result = <FILT>;
    close FILT;
    chomp $result;
    return $result;
}

sub printFunctions($$)
{
    my ($shortName, $path) = @_;
    if (!open OTOOL, "otool -tV '$path' |") {
        print "Could not open $path\n";
        return 0;
    }
    my %functions;
    my $currentSymbol = "";
    while (<OTOOL>) {
        $currentSymbol = $1 if /^(\w+):$/;
        $functions{demangle($currentSymbol)} = 1 if /___cxa_atexit/;
    }
    close OTOOL;
    my $result = 0;
    for my $function (sort keys %functions) {
        if (!$result) {
            print "$shortName has exit time destructors in it! ($path)\n";
            $result = 1;
        }
        print "    $function\n";
    }
    return $result;
}