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      1 #!/usr/bin/perl
      2 
      3 # Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.
      4 #
      5 # Redistribution and use in source and binary forms, with or without
      6 # modification, are permitted provided that the following conditions
      7 # are met:
      8 #
      9 # 1.  Redistributions of source code must retain the above copyright
     10 #     notice, this list of conditions and the following disclaimer. 
     11 # 2.  Redistributions in binary form must reproduce the above copyright
     12 #     notice, this list of conditions and the following disclaimer in the
     13 #     documentation and/or other materials provided with the distribution. 
     14 # 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
     15 #     its contributors may be used to endorse or promote products derived
     16 #     from this software without specific prior written permission. 
     17 #
     18 # THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
     19 # EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     20 # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     21 # DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
     22 # DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     23 # (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     24 # LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
     25 # ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     26 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     27 # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     28 
     29 # "check-for-global-initializers" script for WebKit Open Source Project
     30 
     31 # Intended to be invoked from an Xcode build step to check if there are
     32 # any global initializers in a target.
     33 
     34 use warnings;
     35 use strict;
     36 
     37 use File::Basename;
     38 
     39 sub touch($);
     40 sub demangle($);
     41 
     42 my $arch = $ENV{'CURRENT_ARCH'};
     43 my $configuration = $ENV{'CONFIGURATION'};
     44 my $target = $ENV{'TARGET_NAME'};
     45 my $variant = $ENV{'CURRENT_VARIANT'};
     46 my $coverageBuild = $ENV{'WEBKIT_COVERAGE_BUILD'};
     47 my $debugRoot = $ENV{'WEBKIT_DEBUG_ROOT'};
     48 
     49 $arch = $ENV{'NATIVE_ARCH'} if !$arch; # for Xcode 2.1, which does not have CURRENT_ARCH
     50 $variant = "normal" if !$variant; # for Xcode 2.1, which does not have CURRENT_VARIANT
     51 
     52 my $executablePath = "$ENV{'TARGET_BUILD_DIR'}/$ENV{'EXECUTABLE_PATH'}";
     53 
     54 my $buildTimestampPath = $ENV{'TARGET_TEMP_DIR'} . "/" . basename($0) . ".timestamp";
     55 my $buildTimestampAge = -M $buildTimestampPath;
     56 my $scriptAge = -M $0;
     57 
     58 my $list = $ENV{"LINK_FILE_LIST_${variant}_${arch}"};
     59 
     60 if (!open LIST, $list) {
     61     print "ERROR: Could not open $list\n";
     62     exit 1;
     63 }
     64 
     65 my @files = <LIST>;
     66 chomp @files;
     67 close LIST;
     68 
     69 my $sawError = 0;
     70 
     71 for my $file (sort @files) {
     72     if (defined $buildTimestampAge && $buildTimestampAge < $scriptAge) {
     73         my $fileAge = -M $file;
     74         next if defined $fileAge && $fileAge > $buildTimestampAge;
     75     }
     76     if (!open NM, "(nm '$file' | sed 's/^/STDOUT:/') 2>&1 |") {
     77         print "ERROR: Could not open $file\n";
     78         $sawError = 1;
     79         next;
     80     }
     81     my $sawGlobal = 0;
     82     my @globals;
     83     while (<NM>) {
     84         if (/^STDOUT:/) {
     85             my $line = $_;
     86             if ($line =~ /__GLOBAL__I(.+)$/) {
     87                 $sawGlobal = 1;
     88                 push(@globals, demangle($1));
     89             }
     90         } else {
     91             print STDERR if $_ ne "nm: no name list\n";
     92         }
     93     }
     94     close NM;
     95     if ($sawGlobal) {
     96         my $shortName = $file;
     97         $shortName =~ s/.*\///;
     98 
     99         # Special cases for files that have initializers in debug builds.
    100         if ($configuration eq "Debug" or $variant eq "debug" or $debugRoot) {
    101             if ($target eq "JavaScriptCore") {
    102                 next if $shortName eq "AllInOneFile.o";
    103                 next if $shortName eq "Opcode.o";
    104                 next if $shortName eq "Structure.o";
    105                 next if $shortName eq "nodes.o";
    106             }
    107             if ($target eq "WebCore") {
    108                 next if $shortName eq "BidiRun.o";
    109                 next if $shortName eq "CachedPage.o";
    110                 next if $shortName eq "CachedResource.o";
    111                 next if $shortName eq "FEGaussianBlur.o";
    112                 next if $shortName eq "Frame.o";
    113                 next if $shortName eq "JSCustomSQLTransactionCallback.o";
    114                 next if $shortName eq "JSLazyEventListener.o";
    115                 next if $shortName eq "Node.o";
    116                 next if $shortName eq "Page.o";
    117                 next if $shortName eq "Range.o";
    118                 next if $shortName eq "RenderObject.o";
    119                 next if $shortName eq "SVGElementInstance.o";
    120                 next if $shortName eq "SubresourceLoader.o";
    121                 next if $shortName eq "XMLHttpRequest.o";
    122             }
    123             if ($target eq "WebKit") {
    124                 next if $shortName eq "HostedNetscapePluginStream.o";
    125                 next if $shortName eq "NetscapePluginInstanceProxy.o";
    126             }
    127             if ($target eq "WebKit2") {
    128                 next if $shortName eq "WebContext.o";
    129                 next if $shortName eq "WebFrame.o";
    130                 next if $shortName eq "WebPage.o";
    131                 next if $shortName eq "WebPageProxy.o";
    132             }
    133         }
    134 
    135         print "ERROR: $shortName has one or more global initializers in it! ($file), near @globals\n";
    136         $sawError = 1;
    137     }
    138 }
    139 
    140 if ($sawError and !$coverageBuild) {
    141     unlink $executablePath;
    142     exit 1;
    143 }
    144 
    145 touch($buildTimestampPath);
    146 exit 0;
    147 
    148 sub touch($)
    149 {
    150     my ($path) = @_;
    151     open(TOUCH, ">", $path) or die "$!";
    152     close(TOUCH);
    153 }
    154 
    155 sub demangle($)
    156 {
    157     my ($symbol) = @_;
    158     if (!open FILT, "c++filt $symbol |") {
    159         print "ERROR: Could not open c++filt\n";
    160         return;
    161     }
    162     my $result = <FILT>;
    163     close FILT;
    164     chomp $result;
    165     return $result;
    166 }
    167 
    168