4 # findrfuncs: find reentrant variants of functions used in an executable.
5 # Requires a functional "nm -u". Searches headers in /usr/include
6 # to find available *_r functions and looks for non-reentrant
7 # variants used in the supplied executable.
10 # gsar@ActiveState.com
12 # Hacked to automatically find the executable and shared objects.
20 my @INCDIRS = qw(/usr/include);
24 if (open(CONFIG, "config.sh")) {
26 my $CONFIG = <CONFIG>;
27 $SO = $1 if $CONFIG =~ /^so='(\w+)'/m;
28 $EXE = $1 if $CONFIG =~ /^_exe='\.(\w+)'/m;
31 push @EXES, "perl$EXE";
33 find(sub {push @EXES, $File::Find::name if /.$SO$/}, '.' );
37 if ($^O eq 'dec_osf') {
44 return unless -f $File::Find::name;
45 open my $F, "<$File::Find::name"
46 or die "Can't open $File::Find::name: $!";
48 while (defined ($line = <$F>)) {
49 if ($line =~ /\b(\w+_r)\b/) {
50 #warn "$1 => $File::Find::name\n";
51 $rfuncs{$1} = $File::Find::name;
57 # delete bogus symbols grepped out of comments and such
58 delete $rfuncs{setlocale_r} if $^O eq 'linux';
63 for my $sym (`$NMU $exe`) {
65 $sym =~ s/^\s+[Uu]\s+//;
68 $sym =~ s/\@.*\z//; # remove @@GLIBC_2.0 etc
70 if (exists $rfuncs{"${sym}_r"} && ! $syms{"$sym:$exe"}++) {
76 print "\nFollowing symbols in $exe have reentrant versions:\n";
78 print "$sym => $sym" . "_r (in file " . $rfuncs{"${sym}_r"} . ")\n";