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use Data::Dumper;
sub do_nm
{
my $obj = shift;
open(NM,"nm -p $obj|") || die "Cannot open nm $obj:$!";
$file{$obj} = {};
while (<NM>)
{
if (/\b([A-Z])\b\s*_?(.*)$/)
{
my ($kind,$name) = ($1,$2);
$file{$obj}{$name} = $kind;
if ($kind ne 'U')
{
if (exists($def{$name}) && ($def{$name}[0] ne $kind || $def{$name}[1] ne $obj))
{
warn "$name " . Dumper($def{$name}) . " and [$kind,$obj]\n";
}
$def{$name} = [$kind,$obj];
}
else
{
$ref{$name} = [] unless (exists $ref{$name});
push(@{$ref{$name}},$obj);
}
}
}
close(NM);
}
sub do_need
{
my ($obj,$depth,$why) = @_;
die "No object" unless (defined $obj);
my $hash = $file{$obj};
die "No hash for $obj" unless (defined $hash);
if (exists $need{$obj})
{
push(@{$need{$obj}},[$name,$why]);
$depth{$obj} = $depth if ($depth < $depth{$obj});
}
else
{
$depth{$obj} = $depth;
$need{$obj} = [];
push(@{$need{$obj}},[$name,$why]);
foreach $name (sort keys %$hash)
{
my $kind = $hash->{$name};
if ($kind eq 'U')
{
if (exists $def{$name})
{
my ($kind,$file) = @{$def{$name}};
do_need($file,$depth+1,$obj);
}
else
{
$unres{$name} = [] unless (exists $unres{$name});
push(@{$unres{$name}},$obj);
}
}
}
}
}
1;
|
