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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-exit-time-destructors" script for WebKit Open Source Project
     30 
     31 # Intended to be invoked from an Xcode build step to check if there are
     32 # any exit-time destructors in a target.
     33 
     34 use warnings;
     35 use strict;
     36 
     37 use File::Basename;
     38 
     39 sub touch($);
     40 sub printFunctions($$);
     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 $sawAtExit = 0;
     82     my $shortName = $file;
     83     $shortName =~ s/.*\///;
     84 
     85     while (<NM>) {
     86         if (/^STDOUT:/) {
     87             # With GC logging enabled Heap.o may contain finalizers, so we ignore them.
     88             $sawAtExit = 1 if (/___cxa_atexit/ && ($shortName ne "Heap.o"));
     89         } else {
     90             print STDERR if $_ ne "nm: no name list\n";
     91         }
     92     }
     93     close NM;
     94     next unless $sawAtExit;
     95 
     96     $sawError = 1 if printFunctions($shortName, $file);
     97 }
     98 
     99 if ($sawError and !$coverageBuild) {
    100     print "ERROR: Use DEFINE_STATIC_LOCAL from <wtf/StdLibExtras.h>\n";
    101     unlink $executablePath;
    102     exit 1;
    103 }
    104 
    105 touch($buildTimestampPath);
    106 exit 0;
    107 
    108 sub touch($)
    109 {
    110     my ($path) = @_;
    111     open(TOUCH, ">", $path) or die "$!";
    112     close(TOUCH);
    113 }
    114 
    115 sub demangle($)
    116 {
    117     my ($symbol) = @_;
    118     if (!open FILT, "c++filt $symbol |") {
    119         print "ERROR: Could not open c++filt\n";
    120         return;
    121     }
    122     my $result = <FILT>;
    123     close FILT;
    124     chomp $result;
    125     return $result;
    126 }
    127 
    128 sub printFunctions($$)
    129 {
    130     my ($shortName, $path) = @_;
    131     if (!open OTOOL, "otool -tV '$path' |") {
    132         print "WARNING: Could not open $path\n";
    133         return 0;
    134     }
    135     my %functions;
    136     my $currentSymbol = "";
    137     while (<OTOOL>) {
    138         $currentSymbol = $1 if /^(\w+):$/;
    139         next unless $currentSymbol;
    140         $functions{demangle($currentSymbol)} = 1 if /___cxa_atexit/;
    141     }
    142     close OTOOL;
    143     my $result = 0;
    144     for my $function (sort keys %functions) {
    145         if (!$result) {
    146             print "ERROR: $shortName has exit time destructors in it! ($path)\n";
    147             $result = 1;
    148         }
    149         print "ERROR: In function $function\n";
    150     }
    151     return $result;
    152 }
    153