123 lines
4.4 KiB
Perl
Executable File
123 lines
4.4 KiB
Perl
Executable File
#!/usr/bin/env perl
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# Copyright (C) 2006-2008, 2010, 2013, 2015 Apple Inc. All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
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# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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# DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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# ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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# "check-for-weak-vtables-and-externals" script for WebKit Open Source Project
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# Intended to be invoked from an Xcode build step to check if there are
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# any weak vtables or weak externals in a target.
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use warnings;
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use strict;
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use File::Basename;
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use File::Spec;
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use FindBin;
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use lib $FindBin::Bin;
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use webkitdirs;
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sub touch($);
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my $arch = $ENV{'CURRENT_ARCH'};
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my $configuration = $ENV{'CONFIGURATION'};
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my $target = $ENV{'TARGET_NAME'};
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my $coverageBuild = $ENV{'WEBKIT_COVERAGE_BUILD'};
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my $debugRoot = $ENV{'WEBKIT_DEBUG_ROOT'};
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my $executablePath = "$ENV{'TARGET_BUILD_DIR'}/$ENV{'EXECUTABLE_PATH'}";
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my $buildTimestampPath = $ENV{'TARGET_TEMP_DIR'} . "/" . basename($0) . ".timestamp";
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my $buildTimestampAge = -M $buildTimestampPath;
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my $executablePathAge = -M $executablePath;
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my $sawError = 0;
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if (!defined $executablePathAge || !defined $buildTimestampAge || $executablePathAge < $buildTimestampAge) {
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if (!open NM, "(nm -m '$executablePath' | sed 's/^/STDOUT:/') 2>&1 |") {
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print "ERROR: Could not open $executablePath\n";
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$sawError = 1;
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next;
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}
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my @weakVTableClasses = ();
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my @weakExternalSymbols = ();
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while (<NM>) {
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if (/^STDOUT:/) {
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# Ignore undefined, RTTI and typeinfo symbols.
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next if /\bundefined\b/ or /\b__ZT[IS]/;
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# ASan compiler-rt calls into __asan_mapping_offset and __asan_mapping_scale
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next if /\b___asan/;
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# Ignore weak symbols present when compiling with coverage enabled.
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next if /\b(___llvm_profile_filename|___llvm_profile_raw_version|_lprofDirMode)/ && coverageIsEnabled();
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if (/weak external vtable for (.*)$/) {
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push @weakVTableClasses, $1;
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} elsif (/weak external (.*)$/) {
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push @weakExternalSymbols, $1;
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}
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} else {
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print STDERR if $_ ne "nm: no name list\n";
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}
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}
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close NM;
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my $shortName = $executablePath;
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$shortName =~ s/.*\///;
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if (@weakVTableClasses) {
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print "ERROR: $shortName has a weak vtable in it ($executablePath)\n";
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print "ERROR: Fix by making sure the first virtual function in each of these classes is not an inline:\n";
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for my $class (sort @weakVTableClasses) {
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print "ERROR: class $class\n";
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}
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$sawError = 1;
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}
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if (@weakExternalSymbols) {
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print "ERROR: $shortName has a weak external symbol in it ($executablePath)\n";
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print "ERROR: A weak external symbol is generated when a symbol is defined in multiple compilation units and is also marked as being exported from the library.\n";
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print "ERROR: A common cause of weak external symbols is when an inline function is listed in the linker export file.\n";
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for my $symbol (sort @weakExternalSymbols) {
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print "ERROR: symbol $symbol\n";
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}
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$sawError = 1;
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}
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}
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if ($sawError and !$coverageBuild) {
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unlink $executablePath;
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exit 1;
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}
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touch($buildTimestampPath);
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exit 0;
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sub touch($)
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{
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my ($path) = @_;
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open(TOUCH, ">", $path) or die "$!";
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close(TOUCH);
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}
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