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llvm-project/clang/tools/scan-build/libexec/ccc-analyzer

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#!/usr/bin/env perl
#
# The LLVM Compiler Infrastructure
#
# This file is distributed under the University of Illinois Open Source
# License. See LICENSE.TXT for details.
#
##===----------------------------------------------------------------------===##
#
# A script designed to interpose between the build system and gcc. It invokes
# both gcc and the static analyzer.
#
##===----------------------------------------------------------------------===##
use strict;
use warnings;
use FindBin;
use Cwd qw/ getcwd abs_path /;
use File::Temp qw/ tempfile /;
use File::Path qw / mkpath /;
use File::Basename;
use Text::ParseWords;
##===----------------------------------------------------------------------===##
# List form 'system' with STDOUT and STDERR captured.
##===----------------------------------------------------------------------===##
sub silent_system {
my $HtmlDir = shift;
my $Command = shift;
# Save STDOUT and STDERR and redirect to a temporary file.
open OLDOUT, ">&", \*STDOUT;
open OLDERR, ">&", \*STDERR;
my ($TmpFH, $TmpFile) = tempfile("temp_buf_XXXXXX",
DIR => $HtmlDir,
UNLINK => 1);
open(STDOUT, ">$TmpFile");
open(STDERR, ">&", \*STDOUT);
# Invoke 'system', STDOUT and STDERR are output to a temporary file.
system $Command, @_;
# Restore STDOUT and STDERR.
open STDOUT, ">&", \*OLDOUT;
open STDERR, ">&", \*OLDERR;
return $TmpFH;
}
##===----------------------------------------------------------------------===##
# Compiler command setup.
##===----------------------------------------------------------------------===##
# Search in the PATH if the compiler exists
sub SearchInPath {
my $file = shift;
foreach my $dir (split (':', $ENV{PATH})) {
if (-x "$dir/$file") {
return 1;
}
}
return 0;
}
my $Compiler;
my $Clang;
my $DefaultCCompiler;
my $DefaultCXXCompiler;
my $IsCXX;
my $AnalyzerTarget;
# If on OSX, use xcrun to determine the SDK root.
my $UseXCRUN = 0;
if (`uname -a` =~ m/Darwin/) {
$DefaultCCompiler = 'clang';
$DefaultCXXCompiler = 'clang++';
# Older versions of OSX do not have xcrun to
# query the SDK location.
if (-x "/usr/bin/xcrun") {
$UseXCRUN = 1;
}
} else {
$DefaultCCompiler = 'gcc';
$DefaultCXXCompiler = 'g++';
}
if ($FindBin::Script =~ /c\+\+-analyzer/) {
$Compiler = $ENV{'CCC_CXX'};
if (!defined $Compiler || (! -x $Compiler && ! SearchInPath($Compiler))) { $Compiler = $DefaultCXXCompiler; }
$Clang = $ENV{'CLANG_CXX'};
if (!defined $Clang || ! -x $Clang) { $Clang = 'clang++'; }
$IsCXX = 1
}
else {
$Compiler = $ENV{'CCC_CC'};
if (!defined $Compiler || (! -x $Compiler && ! SearchInPath($Compiler))) { $Compiler = $DefaultCCompiler; }
$Clang = $ENV{'CLANG'};
if (!defined $Clang || ! -x $Clang) { $Clang = 'clang'; }
$IsCXX = 0
}
$AnalyzerTarget = $ENV{'CLANG_ANALYZER_TARGET'};
##===----------------------------------------------------------------------===##
# Cleanup.
##===----------------------------------------------------------------------===##
my $ReportFailures = $ENV{'CCC_REPORT_FAILURES'};
if (!defined $ReportFailures) { $ReportFailures = 1; }
my $CleanupFile;
my $ResultFile;
# Remove any stale files at exit.
END {
if (defined $ResultFile && -z $ResultFile) {
unlink($ResultFile);
}
if (defined $CleanupFile) {
unlink($CleanupFile);
}
}
##----------------------------------------------------------------------------##
# Process Clang Crashes.
##----------------------------------------------------------------------------##
sub GetPPExt {
my $Lang = shift;
if ($Lang =~ /objective-c\+\+/) { return ".mii" };
if ($Lang =~ /objective-c/) { return ".mi"; }
if ($Lang =~ /c\+\+/) { return ".ii"; }
return ".i";
}
# Set this to 1 if we want to include 'parser rejects' files.
my $IncludeParserRejects = 0;
my $ParserRejects = "Parser Rejects";
my $AttributeIgnored = "Attribute Ignored";
my $OtherError = "Other Error";
sub ProcessClangFailure {
my ($Clang, $Lang, $file, $Args, $HtmlDir, $ErrorType, $ofile) = @_;
my $Dir = "$HtmlDir/failures";
mkpath $Dir;
my $prefix = "clang_crash";
if ($ErrorType eq $ParserRejects) {
$prefix = "clang_parser_rejects";
}
elsif ($ErrorType eq $AttributeIgnored) {
$prefix = "clang_attribute_ignored";
}
elsif ($ErrorType eq $OtherError) {
$prefix = "clang_other_error";
}
# Generate the preprocessed file with Clang.
my ($PPH, $PPFile) = tempfile( $prefix . "_XXXXXX",
SUFFIX => GetPPExt($Lang),
DIR => $Dir);
close ($PPH);
system $Clang, @$Args, "-E", "-o", $PPFile;
# Create the info file.
open (OUT, ">", "$PPFile.info.txt") or die "Cannot open $PPFile.info.txt\n";
print OUT abs_path($file), "\n";
print OUT "$ErrorType\n";
print OUT "@$Args\n";
close OUT;
`uname -a >> $PPFile.info.txt 2>&1`;
`"$Compiler" -v >> $PPFile.info.txt 2>&1`;
rename($ofile, "$PPFile.stderr.txt");
return (basename $PPFile);
}
##----------------------------------------------------------------------------##
# Running the analyzer.
##----------------------------------------------------------------------------##
sub GetCCArgs {
my $HtmlDir = shift;
my $mode = shift;
my $Args = shift;
my $line;
my $OutputStream = silent_system($HtmlDir, $Clang, "-###", $mode, @$Args);
while (<$OutputStream>) {
next if (!/\s"?-cc1"?\s/);
$line = $_;
}
die "could not find clang line\n" if (!defined $line);
# Strip leading and trailing whitespace characters.
$line =~ s/^\s+|\s+$//g;
my @items = quotewords('\s+', 0, $line);
my $cmd = shift @items;
die "cannot find 'clang' in 'clang' command\n" if (!($cmd =~ /clang/));
return \@items;
}
sub Analyze {
my ($Clang, $OriginalArgs, $AnalyzeArgs, $Lang, $Output, $Verbose, $HtmlDir,
$file) = @_;
my @Args = @$OriginalArgs;
my $Cmd;
my @CmdArgs;
my @CmdArgsSansAnalyses;
if ($Lang =~ /header/) {
exit 0 if (!defined ($Output));
$Cmd = 'cp';
push @CmdArgs, $file;
# Remove the PCH extension.
$Output =~ s/[.]gch$//;
push @CmdArgs, $Output;
@CmdArgsSansAnalyses = @CmdArgs;
}
else {
$Cmd = $Clang;
# Create arguments for doing regular parsing.
my $SyntaxArgs = GetCCArgs($HtmlDir, "-fsyntax-only", \@Args);
@CmdArgsSansAnalyses = @$SyntaxArgs;
# Create arguments for doing static analysis.
if (defined $ResultFile) {
push @Args, '-o', $ResultFile;
}
elsif (defined $HtmlDir) {
push @Args, '-o', $HtmlDir;
}
if ($Verbose) {
push @Args, "-Xclang", "-analyzer-display-progress";
}
foreach my $arg (@$AnalyzeArgs) {
push @Args, "-Xclang", $arg;
}
# Display Ubiviz graph?
if (defined $ENV{'CCC_UBI'}) {
push @Args, "-Xclang", "-analyzer-viz-egraph-ubigraph";
}
if (defined $AnalyzerTarget) {
push @Args, "-target", $AnalyzerTarget;
}
my $AnalysisArgs = GetCCArgs($HtmlDir, "--analyze", \@Args);
@CmdArgs = @$AnalysisArgs;
}
my @PrintArgs;
my $dir;
if ($Verbose) {
$dir = getcwd();
print STDERR "\n[LOCATION]: $dir\n";
push @PrintArgs,"'$Cmd'";
foreach my $arg (@CmdArgs) {
push @PrintArgs,"\'$arg\'";
}
}
if ($Verbose == 1) {
# We MUST print to stderr. Some clients use the stdout output of
# gcc for various purposes.
print STDERR join(' ', @PrintArgs);
print STDERR "\n";
}
elsif ($Verbose == 2) {
print STDERR "#SHELL (cd '$dir' && @PrintArgs)\n";
}
# Save STDOUT and STDERR of clang to a temporary file and reroute
# all clang output to ccc-analyzer's STDERR.
# We save the output file in the 'crashes' directory if clang encounters
# any problems with the file.
my ($ofh, $ofile) = tempfile("clang_output_XXXXXX", DIR => $HtmlDir);
my $OutputStream = silent_system($HtmlDir, $Cmd, @CmdArgs);
while ( <$OutputStream> ) {
print $ofh $_;
print STDERR $_;
}
my $Result = $?;
close $ofh;
# Did the command die because of a signal?
if ($ReportFailures) {
if ($Result & 127 and $Cmd eq $Clang and defined $HtmlDir) {
ProcessClangFailure($Clang, $Lang, $file, \@CmdArgsSansAnalyses,
$HtmlDir, "Crash", $ofile);
}
elsif ($Result) {
if ($IncludeParserRejects && !($file =~/conftest/)) {
ProcessClangFailure($Clang, $Lang, $file, \@CmdArgsSansAnalyses,
$HtmlDir, $ParserRejects, $ofile);
} else {
ProcessClangFailure($Clang, $Lang, $file, \@CmdArgsSansAnalyses,
$HtmlDir, $OtherError, $ofile);
}
}
else {
# Check if there were any unhandled attributes.
if (open(CHILD, $ofile)) {
my %attributes_not_handled;
# Don't flag warnings about the following attributes that we
# know are currently not supported by Clang.
$attributes_not_handled{"cdecl"} = 1;
my $ppfile;
while (<CHILD>) {
next if (! /warning: '([^\']+)' attribute ignored/);
# Have we already spotted this unhandled attribute?
next if (defined $attributes_not_handled{$1});
$attributes_not_handled{$1} = 1;
# Get the name of the attribute file.
my $dir = "$HtmlDir/failures";
my $afile = "$dir/attribute_ignored_$1.txt";
# Only create another preprocessed file if the attribute file
# doesn't exist yet.
next if (-e $afile);
# Add this file to the list of files that contained this attribute.
# Generate a preprocessed file if we haven't already.
if (!(defined $ppfile)) {
$ppfile = ProcessClangFailure($Clang, $Lang, $file,
\@CmdArgsSansAnalyses,
$HtmlDir, $AttributeIgnored, $ofile);
}
mkpath $dir;
open(AFILE, ">$afile");
print AFILE "$ppfile\n";
close(AFILE);
}
close CHILD;
}
}
}
unlink($ofile);
}
##----------------------------------------------------------------------------##
# Lookup tables.
##----------------------------------------------------------------------------##
my %CompileOptionMap = (
'-nostdinc' => 0,
'-include' => 1,
'-idirafter' => 1,
'-imacros' => 1,
'-iprefix' => 1,
'-iquote' => 1,
'-iwithprefix' => 1,
'-iwithprefixbefore' => 1
);
my %LinkerOptionMap = (
'-framework' => 1,
'-fobjc-link-runtime' => 0
);
my %CompilerLinkerOptionMap = (
'-Wwrite-strings' => 0,
'-ftrapv-handler' => 1, # specifically call out separated -f flag
'-mios-simulator-version-min' => 0, # This really has 1 argument, but always has '='
'-isysroot' => 1,
'-arch' => 1,
'-m32' => 0,
'-m64' => 0,
'-stdlib' => 0, # This is really a 1 argument, but always has '='
'--sysroot' => 1,
'-target' => 1,
'-v' => 0,
'-mmacosx-version-min' => 0, # This is really a 1 argument, but always has '='
'-miphoneos-version-min' => 0 # This is really a 1 argument, but always has '='
);
my %IgnoredOptionMap = (
'-MT' => 1, # Ignore these preprocessor options.
'-MF' => 1,
'-fsyntax-only' => 0,
'-save-temps' => 0,
'-install_name' => 1,
'-exported_symbols_list' => 1,
'-current_version' => 1,
'-compatibility_version' => 1,
'-init' => 1,
'-e' => 1,
'-seg1addr' => 1,
'-bundle_loader' => 1,
'-multiply_defined' => 1,
'-sectorder' => 3,
'--param' => 1,
'-u' => 1,
'--serialize-diagnostics' => 1
);
my %LangMap = (
'c' => $IsCXX ? 'c++' : 'c',
'cp' => 'c++',
'cpp' => 'c++',
'cxx' => 'c++',
'txx' => 'c++',
'cc' => 'c++',
'C' => 'c++',
'ii' => 'c++-cpp-output',
'i' => $IsCXX ? 'c++-cpp-output' : 'c-cpp-output',
'm' => 'objective-c',
'mi' => 'objective-c-cpp-output',
'mm' => 'objective-c++',
'mii' => 'objective-c++-cpp-output',
);
my %UniqueOptions = (
'-isysroot' => 0
);
##----------------------------------------------------------------------------##
# Languages accepted.
##----------------------------------------------------------------------------##
my %LangsAccepted = (
"objective-c" => 1,
"c" => 1,
"c++" => 1,
"objective-c++" => 1,
"c-cpp-output" => 1,
"objective-c-cpp-output" => 1,
"c++-cpp-output" => 1
);
##----------------------------------------------------------------------------##
# Main Logic.
##----------------------------------------------------------------------------##
my $Action = 'link';
my @CompileOpts;
my @LinkOpts;
my @Files;
my $Lang;
my $Output;
my %Uniqued;
# Forward arguments to gcc.
my $Status = system($Compiler,@ARGV);
if (defined $ENV{'CCC_ANALYZER_LOG'}) {
print STDERR "$Compiler @ARGV\n";
}
if ($Status) { exit($Status >> 8); }
# Get the analysis options.
my $Analyses = $ENV{'CCC_ANALYZER_ANALYSIS'};
# Get the plugins to load.
my $Plugins = $ENV{'CCC_ANALYZER_PLUGINS'};
# Get the store model.
my $StoreModel = $ENV{'CCC_ANALYZER_STORE_MODEL'};
# Get the constraints engine.
my $ConstraintsModel = $ENV{'CCC_ANALYZER_CONSTRAINTS_MODEL'};
#Get the internal stats setting.
my $InternalStats = $ENV{'CCC_ANALYZER_INTERNAL_STATS'};
# Get the output format.
my $OutputFormat = $ENV{'CCC_ANALYZER_OUTPUT_FORMAT'};
if (!defined $OutputFormat) { $OutputFormat = "html"; }
# Get the config options.
my $ConfigOptions = $ENV{'CCC_ANALYZER_CONFIG'};
# Determine the level of verbosity.
my $Verbose = 0;
if (defined $ENV{'CCC_ANALYZER_VERBOSE'}) { $Verbose = 1; }
if (defined $ENV{'CCC_ANALYZER_LOG'}) { $Verbose = 2; }
# Get the HTML output directory.
my $HtmlDir = $ENV{'CCC_ANALYZER_HTML'};
my %DisabledArchs = ('ppc' => 1, 'ppc64' => 1);
my %ArchsSeen;
my $HadArch = 0;
my $HasSDK = 0;
# Process the arguments.
foreach (my $i = 0; $i < scalar(@ARGV); ++$i) {
my $Arg = $ARGV[$i];
my ($ArgKey) = split /=/,$Arg,2;
# Be friendly to "" in the argument list.
if (!defined($ArgKey)) {
next;
}
# Modes ccc-analyzer supports
if ($Arg =~ /^-(E|MM?)$/) { $Action = 'preprocess'; }
elsif ($Arg eq '-c') { $Action = 'compile'; }
elsif ($Arg =~ /^-print-prog-name/) { exit 0; }
# Specially handle duplicate cases of -arch
if ($Arg eq "-arch") {
my $arch = $ARGV[$i+1];
# We don't want to process 'ppc' because of Clang's lack of support
# for Altivec (also some #defines won't likely be defined correctly, etc.)
if (!(defined $DisabledArchs{$arch})) { $ArchsSeen{$arch} = 1; }
$HadArch = 1;
++$i;
next;
}
# On OSX/iOS, record if an SDK path was specified. This
# is innocuous for other platforms, so the check just happens.
if ($Arg =~ /^-isysroot/) {
$HasSDK = 1;
}
# Options with possible arguments that should pass through to compiler.
if (defined $CompileOptionMap{$ArgKey}) {
my $Cnt = $CompileOptionMap{$ArgKey};
push @CompileOpts,$Arg;
while ($Cnt > 0) { ++$i; --$Cnt; push @CompileOpts, $ARGV[$i]; }
next;
}
# Handle the case where there isn't a space after -iquote
if ($Arg =~ /^-iquote.*/) {
push @CompileOpts,$Arg;
next;
}
# Options with possible arguments that should pass through to linker.
if (defined $LinkerOptionMap{$ArgKey}) {
my $Cnt = $LinkerOptionMap{$ArgKey};
push @LinkOpts,$Arg;
while ($Cnt > 0) { ++$i; --$Cnt; push @LinkOpts, $ARGV[$i]; }
next;
}
# Options with possible arguments that should pass through to both compiler
# and the linker.
if (defined $CompilerLinkerOptionMap{$ArgKey}) {
my $Cnt = $CompilerLinkerOptionMap{$ArgKey};
# Check if this is an option that should have a unique value, and if so
# determine if the value was checked before.
if ($UniqueOptions{$Arg}) {
if (defined $Uniqued{$Arg}) {
$i += $Cnt;
next;
}
$Uniqued{$Arg} = 1;
}
push @CompileOpts,$Arg;
push @LinkOpts,$Arg;
while ($Cnt > 0) {
++$i; --$Cnt;
push @CompileOpts, $ARGV[$i];
push @LinkOpts, $ARGV[$i];
}
next;
}
# Ignored options.
if (defined $IgnoredOptionMap{$ArgKey}) {
my $Cnt = $IgnoredOptionMap{$ArgKey};
while ($Cnt > 0) {
++$i; --$Cnt;
}
next;
}
# Compile mode flags.
if ($Arg =~ /^-(?:[DIU]|isystem)(.*)$/) {
my $Tmp = $Arg;
if ($1 eq '') {
# FIXME: Check if we are going off the end.
++$i;
$Tmp = $Arg . $ARGV[$i];
}
push @CompileOpts,$Tmp;
next;
}
if ($Arg =~ /^-m.*/) {
push @CompileOpts,$Arg;
next;
}
# Language.
if ($Arg eq '-x') {
$Lang = $ARGV[$i+1];
++$i; next;
}
# Output file.
if ($Arg eq '-o') {
++$i;
$Output = $ARGV[$i];
next;
}
# Get the link mode.
if ($Arg =~ /^-[l,L,O]/) {
if ($Arg eq '-O') { push @LinkOpts,'-O1'; }
elsif ($Arg eq '-Os') { push @LinkOpts,'-O2'; }
else { push @LinkOpts,$Arg; }
# Must pass this along for the __OPTIMIZE__ macro
if ($Arg =~ /^-O/) { push @CompileOpts,$Arg; }
next;
}
if ($Arg =~ /^-std=/) {
push @CompileOpts,$Arg;
next;
}
# Get the compiler/link mode.
if ($Arg =~ /^-F(.+)$/) {
my $Tmp = $Arg;
if ($1 eq '') {
# FIXME: Check if we are going off the end.
++$i;
$Tmp = $Arg . $ARGV[$i];
}
push @CompileOpts,$Tmp;
push @LinkOpts,$Tmp;
next;
}
# Input files.
if ($Arg eq '-filelist') {
# FIXME: Make sure we aren't walking off the end.
open(IN, $ARGV[$i+1]);
while (<IN>) { s/\015?\012//; push @Files,$_; }
close(IN);
++$i;
next;
}
if ($Arg =~ /^-f/) {
push @CompileOpts,$Arg;
push @LinkOpts,$Arg;
next;
}
# Handle -Wno-. We don't care about extra warnings, but
# we should suppress ones that we don't want to see.
if ($Arg =~ /^-Wno-/) {
push @CompileOpts, $Arg;
next;
}
# Handle -Xclang some-arg. Add both arguments to the compiler options.
if ($Arg =~ /^-Xclang$/) {
# FIXME: Check if we are going off the end.
++$i;
push @CompileOpts, $Arg;
push @CompileOpts, $ARGV[$i];
next;
}
if (!($Arg =~ /^-/)) {
push @Files, $Arg;
next;
}
}
# If we are on OSX and have an installation where the
# default SDK is inferred by xcrun use xcrun to infer
# the SDK.
if (not $HasSDK and $UseXCRUN) {
my $sdk = `/usr/bin/xcrun --show-sdk-path -sdk macosx`;
chomp $sdk;
push @CompileOpts, "-isysroot", $sdk;
}
if ($Action eq 'compile' or $Action eq 'link') {
my @Archs = keys %ArchsSeen;
# Skip the file if we don't support the architectures specified.
exit 0 if ($HadArch && scalar(@Archs) == 0);
foreach my $file (@Files) {
# Determine the language for the file.
my $FileLang = $Lang;
if (!defined($FileLang)) {
# Infer the language from the extension.
if ($file =~ /[.]([^.]+)$/) {
$FileLang = $LangMap{$1};
}
}
# FileLang still not defined? Skip the file.
next if (!defined $FileLang);
# Language not accepted?
next if (!defined $LangsAccepted{$FileLang});
my @CmdArgs;
my @AnalyzeArgs;
if ($FileLang ne 'unknown') {
push @CmdArgs, '-x', $FileLang;
}
if (defined $StoreModel) {
push @AnalyzeArgs, "-analyzer-store=$StoreModel";
}
if (defined $ConstraintsModel) {
push @AnalyzeArgs, "-analyzer-constraints=$ConstraintsModel";
}
if (defined $InternalStats) {
push @AnalyzeArgs, "-analyzer-stats";
}
if (defined $Analyses) {
push @AnalyzeArgs, split '\s+', $Analyses;
}
if (defined $Plugins) {
push @AnalyzeArgs, split '\s+', $Plugins;
}
if (defined $OutputFormat) {
push @AnalyzeArgs, "-analyzer-output=" . $OutputFormat;
if ($OutputFormat =~ /plist/) {
# Change "Output" to be a file.
my ($h, $f) = tempfile("report-XXXXXX", SUFFIX => ".plist",
DIR => $HtmlDir);
$ResultFile = $f;
# If the HtmlDir is not set, we should clean up the plist files.
if (!defined $HtmlDir || -z $HtmlDir) {
$CleanupFile = $f;
}
}
}
if (defined $ConfigOptions) {
push @AnalyzeArgs, split '\s+', $ConfigOptions;
}
push @CmdArgs, @CompileOpts;
push @CmdArgs, $file;
if (scalar @Archs) {
foreach my $arch (@Archs) {
my @NewArgs;
push @NewArgs, '-arch', $arch;
push @NewArgs, @CmdArgs;
Analyze($Clang, \@NewArgs, \@AnalyzeArgs, $FileLang, $Output,
$Verbose, $HtmlDir, $file);
}
}
else {
Analyze($Clang, \@CmdArgs, \@AnalyzeArgs, $FileLang, $Output,
$Verbose, $HtmlDir, $file);
}
}
}
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