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#!/usr/bin/perl |
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# |
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# check_db_symbols - print some statistics about the direct binding |
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# status of symbols of a given binary |
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# |
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|
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use strict; |
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use warnings; |
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|
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################################################################### |
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# Useful functions |
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################################################################### |
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|
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my $ELFDUMP_BIN = '/usr/ccs/bin/elfdump'; |
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|
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# Returns the list of symbols bind flags for a given binary |
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# as a hash where symbol name is the key and flag is the value |
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sub get_symbols_flags { |
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my ($binary) = @_; |
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my %symbol_flags_of; |
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|
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local $ENV{'LANG'} = 'C'; |
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open( my $elfdump, '-|', "$ELFDUMP_BIN -y $binary" ) |
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or die "ERROR: Can't analyze $binary with elfdump !"; |
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while ( my $line = <$elfdump> ) { |
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chomp($line); |
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next if not( |
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$line =~ m{ |
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\[(?<index>\d+)\]\s+ |
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(?<flags>\S+)\s+ |
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(?:(?<boundto> |
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\[\d+\]\s(?<soname>\S+) |
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|<self>)\s+)? |
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(?<symbol>\S+) |
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}x |
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); |
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|
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my $soname = defined $+{'soname'} ? $+{'soname'} : '<self>'; |
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$symbol_flags_of{$soname}{ $+{'symbol'} } = $+{'flags'}; |
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} |
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close($elfdump); |
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|
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return ( \%symbol_flags_of ); |
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} |
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|
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my $LDD_BIN = '/usr/bin/ldd'; |
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|
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# Find the real location of libraries against which the given |
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# binary is linked. |
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# Returns a hash where soname is the key and real path is the value |
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sub get_libraries_location { |
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my ($binary) = @_; |
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my %library_location; |
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|
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local $ENV{'LANG'} = 'C'; |
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open( my $ldd, '-|', "$LDD_BIN $binary" ) |
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or die "ERROR: Can't analyze $binary with elfdump !"; |
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while ( my $line = <$ldd> ) { |
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my ( $soname, $library_path ) = ( |
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$line =~ m{\s*(\S+) # soname |
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(?:\s+=>\s+ |
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(\S+))? # library path |
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}x |
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); |
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|
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# (file not found) case |
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if ( not defined($library_path) ) { |
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$library_path = $soname; |
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$soname = ( split( /\//, $soname ) )[-1] |
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|
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} |
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elsif ( $library_path eq '(file' ) { |
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$library_path = undef; |
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} |
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$library_location{$soname} = $library_path; |
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} |
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close($ldd); |
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|
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return ( \%library_location ); |
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} |
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|
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sub usage { |
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my ($exit_code) = @_; |
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print <<'EOF'; |
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Usage: check_db_symbols BINARY |
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Print some statistics about the direct binding status of symbols of a given binary |
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|
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EOF |
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exit($exit_code); |
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} |
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|
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################################################################### |
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# Main program |
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################################################################### |
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|
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if ( @ARGV < 1 ) { |
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usage(1); |
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} |
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|
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my $binary = $ARGV[0]; |
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|
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if ( !-f $binary ) { |
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print STDERR "ERROR: $binary file doesn't exist !!\n\n"; |
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exit(2); |
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} |
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|
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my $library_location_of = get_libraries_location($binary); |
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my $symbol_flags_of = get_symbols_flags($binary); |
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|
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printf( |
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"\n%-20s %10s %10s %10s\n", |
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( |
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'Library', |
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'Directly bound', |
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'Not directly bound', |
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'Not directly bindable' |
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) |
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); |
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|
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my @unfound_libraries; |
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foreach my $soname ( keys( %{$symbol_flags_of} ) ) { |
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next if ( $soname eq '<self>' ); |
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|
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my %symbol_counts = ( |
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directly_bound => 0, |
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not_directly_bound => 0, |
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non_directly_bindable => 0, |
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); |
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|
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my $library_location = $library_location_of->{$soname}; |
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if ( not defined($library_location) ) { |
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push( @unfound_libraries, $soname ); |
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next; |
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} |
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my $soname_symbol_flags_for = get_symbols_flags($library_location); |
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|
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foreach my $symbol ( keys( %{ $symbol_flags_of->{$soname} } ) ) { |
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my $flag = $symbol_flags_of->{$soname}{$symbol}; |
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if ( $flag =~ /B/ ) { |
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$symbol_counts{directly_bound}++; |
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} |
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else { |
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if ( $soname_symbol_flags_for->{'<self>'}{$symbol} =~ /N/ ) { |
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$symbol_counts{non_directly_bindable}++; |
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} |
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else { |
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$symbol_counts{not_directly_bound}++; |
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} |
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} |
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} |
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printf( |
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"%-20s %10i %10i %10i\n", |
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( |
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$soname, |
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@symbol_counts{ |
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'directly_bound', 'not_directly_bound', |
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'non_directly_bindable' |
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} |
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) |
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); |
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} |
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|
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if (@unfound_libraries) { |
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print <<'EOF'; |
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|
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The following libraries were not found, please make sure |
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I can find them next time by setting LD_LIBRARY_PATH adequately: |
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EOF |
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print( "\t" . join( ', ', @unfound_libraries ) . "\n" ); |
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} |
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|
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print "\n"; |
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|
