#!/usr/bin/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;
    }
}
id=2ad5d52d42810bed95100a3d912679d8864421ec'>tree</a><a class='active' href='/cgit.cgi/linux/net-next.git/commit/include/net/iucv/af_iucv.h?id=2ad5d52d42810bed95100a3d912679d8864421ec'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/include/net/iucv/af_iucv.h?id=2ad5d52d42810bed95100a3d912679d8864421ec'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/include/net/iucv/af_iucv.h'>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=2ad5d52d42810bed95100a3d912679d8864421ec'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include?id=2ad5d52d42810bed95100a3d912679d8864421ec'>include</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/net?id=2ad5d52d42810bed95100a3d912679d8864421ec'>net</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/net/iucv?id=2ad5d52d42810bed95100a3d912679d8864421ec'>iucv</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/net/iucv/af_iucv.h?id=2ad5d52d42810bed95100a3d912679d8864421ec'>af_iucv.h</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='2ad5d52d42810bed95100a3d912679d8864421ec'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Helge Deller &lt;deller@gmx.de&gt;</td><td class='right'>2017-01-28 11:52:02 +0100</td></tr>
<tr><th>committer</th><td>Helge Deller &lt;deller@gmx.de&gt;</td><td class='right'>2017-01-28 21:54:23 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/net/iucv/af_iucv.h?id=2ad5d52d42810bed95100a3d912679d8864421ec'>2ad5d52d42810bed95100a3d912679d8864421ec</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/net/iucv/af_iucv.h?id=2ad5d52d42810bed95100a3d912679d8864421ec'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=2ad5d52d42810bed95100a3d912679d8864421ec'>7f93e2f906b1c86f5b76c0f4c0978d41a8a29861</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include/net/iucv/af_iucv.h?id=2ad5d52d42810bed95100a3d912679d8864421ec'>include/net/iucv/af_iucv.h</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/net/iucv/af_iucv.h?id=83b5d1e3d3013dbf90645a5d07179d018c8243fa'>83b5d1e3d3013dbf90645a5d07179d018c8243fa</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/net/iucv/af_iucv.h?id=2ad5d52d42810bed95100a3d912679d8864421ec&amp;id2=83b5d1e3d3013dbf90645a5d07179d018c8243fa'>diff</a>)</td></tr></table>
<div class='commit-subject'>parisc: Don't use BITS_PER_LONG in userspace-exported swab.h header</div><div class='commit-msg'>In swab.h the "#if BITS_PER_LONG &gt; 32" breaks compiling userspace programs if
BITS_PER_LONG is #defined by userspace with the sizeof() compiler builtin.

Solve this problem by using __BITS_PER_LONG instead.  Since we now
#include asm/bitsperlong.h avoid further potential userspace pollution
by moving the #define of SHIFT_PER_LONG to bitops.h which is not
exported to userspace.

This patch unbreaks compiling qemu on hppa/parisc.

Signed-off-by: Helge Deller &lt;deller@gmx.de&gt;
Cc: &lt;stable@vger.kernel.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=2ad5d52d42810bed95100a3d912679d8864421ec'>Diffstat</a> (limited to 'include/net/iucv/af_iucv.h')</div><table summary='diffstat' class='diffstat'>