mirror of
https://github.com/torvalds/linux
synced 2024-07-21 10:35:42 +00:00
cb77f0d623
The default NetBSD package manager is pkgsrc and it installs Perl along other third party programs under custom and configurable prefix. The default prefix for binary prebuilt packages is /usr/pkg, and the Perl executable lands in /usr/pkg/bin/perl. This change switches "/usr/bin/perl" to "/usr/bin/env perl" as it's the most portable solution that should work for almost everybody. Perl's executable is detected automatically. This change switches -w option passed to the executable with more modern "use warnings;" approach. There is no functional change to the default behavior. While there, drop "require 5" from scripts/namespace.pl (Perl from 1994?). Signed-off-by: Kamil Rytarowski <n54@gmx.com> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
60 lines
1.8 KiB
Perl
Executable file
60 lines
1.8 KiB
Perl
Executable file
#!/usr/bin/env perl
|
|
|
|
# Read two files produced by the stackusage script, and show the
|
|
# delta between them.
|
|
#
|
|
# Currently, only shows changes for functions listed in both files. We
|
|
# could add an option to show also functions which have vanished or
|
|
# appeared (which would often be due to gcc making other inlining
|
|
# decisions).
|
|
#
|
|
# Another possible option would be a minimum absolute value for the
|
|
# delta.
|
|
#
|
|
# A third possibility is for sorting by delta, but that can be
|
|
# achieved by piping to sort -k5,5g.
|
|
|
|
sub read_stack_usage_file {
|
|
my %su;
|
|
my $f = shift;
|
|
open(my $fh, '<', $f)
|
|
or die "cannot open $f: $!";
|
|
while (<$fh>) {
|
|
chomp;
|
|
my ($file, $func, $size, $type) = split;
|
|
# Old versions of gcc (at least 4.7) have an annoying quirk in
|
|
# that a (static) function whose name has been changed into
|
|
# for example ext4_find_unwritten_pgoff.isra.11 will show up
|
|
# in the .su file with a name of just "11". Since such a
|
|
# numeric suffix is likely to change across different
|
|
# commits/compilers/.configs or whatever else we're trying to
|
|
# tweak, we can't really track those functions, so we just
|
|
# silently skip them.
|
|
#
|
|
# Newer gcc (at least 5.0) report the full name, so again,
|
|
# since the suffix is likely to change, we strip it.
|
|
next if $func =~ m/^[0-9]+$/;
|
|
$func =~ s/\..*$//;
|
|
# Line numbers are likely to change; strip those.
|
|
$file =~ s/:[0-9]+$//;
|
|
$su{"${file}\t${func}"} = {size => $size, type => $type};
|
|
}
|
|
close($fh);
|
|
return \%su;
|
|
}
|
|
|
|
@ARGV == 2
|
|
or die "usage: $0 <old> <new>";
|
|
|
|
my $old = read_stack_usage_file($ARGV[0]);
|
|
my $new = read_stack_usage_file($ARGV[1]);
|
|
my @common = sort grep {exists $new->{$_}} keys %$old;
|
|
for (@common) {
|
|
my $x = $old->{$_}{size};
|
|
my $y = $new->{$_}{size};
|
|
my $delta = $y - $x;
|
|
if ($delta) {
|
|
printf "%s\t%d\t%d\t%+d\n", $_, $x, $y, $delta;
|
|
}
|
|
}
|