[PATCH] checkstack: print module names
Finding "init_module" high stack usage problems is challenging when there
are over 1600 "init_module" functions in the kernel tree, so make
checkstack.pl print out the filename where the stack usage occurs. This is
useful for code built as loadable modules.
For built-in code, it just prints the kernel image file name, like
"vmlinux". Examples:
(before patch:)
0x0000000d callback: 1928
0xffffffff81678c09 huft_build: 1560
0x0018 init_module: 1512
(after patch:)
0x0000000d callback [divacapi]: 1928
0xffffffff81678c09 huft_build [vmlinux]: 1560
0x0018 init_module [hdaps]: 1512
Also change one if-series to use elsif to cut down on unneeded tests.
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Acked-by: Joern Engel <joern@wh.fh-wedel.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/scripts/checkstack.pl b/scripts/checkstack.pl
index dadfa20..b349246 100755
--- a/scripts/checkstack.pl
+++ b/scripts/checkstack.pl
@@ -89,11 +89,21 @@
#
my $funcre = qr/^$x* <(.*)>:$/;
my $func;
+my $file, $lastslash;
+
while (my $line = <STDIN>) {
if ($line =~ m/$funcre/) {
$func = $1;
}
- if ($line =~ m/$re/) {
+ elsif ($line =~ m/(.*):\s*file format/) {
+ $file = $1;
+ $file =~ s/\.ko//;
+ $lastslash = rindex($file, "/");
+ if ($lastslash != -1) {
+ $file = substr($file, $lastslash + 1);
+ }
+ }
+ elsif ($line =~ m/$re/) {
my $size = $1;
$size = hex($size) if ($size =~ /^0x/);
@@ -109,7 +119,7 @@
$addr =~ s/ /0/g;
$addr = "0x$addr";
- my $intro = "$addr $func:";
+ my $intro = "$addr $func [$file]:";
my $padlen = 56 - length($intro);
while ($padlen > 0) {
$intro .= ' ';