#!/usr/bin/perl
+
# Check the stack usage of functions
#
-# Copyright Joern Engel <joern@wh.fh-wedel.de>
+# Copyright Joern Engel <joern@lazybastard.org>
# Inspired by Linus Torvalds
# Original idea maybe from Keith Owens
# s390 port and big speedup by Arnd Bergmann <arnd@bergmann-dalldorf.de>
-# Modified to have simpler output format by Dan Kegel
+# Mips port by Juan Quintela <quintela@mandrakesoft.com>
+# IA64 port via Andreas Dilger
+# Arm port by Holger Schurig
+# sh64 port by Paul Mundt
+# Random bits by Matt Mackall <mpm@selenic.com>
+# M68k port by Geert Uytterhoeven and Andreas Schwab
+# AVR32 port by Haavard Skinnemoen <hskinnemoen@atmel.com>
+# PARISC port by Kyle McMartin <kyle@parisc-linux.org>
+# sparc port by Martin Habets <errandir_news@mph.eclipse.co.uk>
#
# Usage:
-# objdump -d vmlinux | stackcheck.pl [arch]
+# objdump -d vmlinux | scripts/checkstack.pl [arch]
#
# find <moduledir> -name "*.o" | while read M; do
# objdump -d $M | perl ~/checkstack.pl <arch> | \
# sed "s/^/`basename $M`: /" ; done | \
# awk '/esp/ { print $5, $2, $4 }' | sort -nr
-
# TODO : Port to all architectures (one regex per arch)
# check for arch
-#
-# $re is used for three matches:
+#
+# $re is used for two matches:
+# $& (whole re) matches the complete objdump line with the stack growth
+# $1 (first bracket) matches the size of the stack growth
+#
+# $dre is similar, but for dynamic stack redutions:
# $& (whole re) matches the complete objdump line with the stack growth
-# $1 (first bracket) matches the code that will be displayed in the output
-# $2 (second bracket) matches the size of the stack growth
+# $1 (first bracket) matches the dynamic amount of the stack growth
#
# use anything else and feel the pain ;)
+my (@stack, $re, $dre, $x, $xs);
{
my $arch = shift;
- $x = "[0-9a-f]{2,5}"; # hex number >= 256
- $d = "([0-9]{2}|[2-9])[0-9]{2}"; # decimal number >= 200
if ($arch eq "") {
$arch = `uname -m`;
+ chomp($arch);
}
- if ($arch =~ /^i[3456]86$/) {
+
+ $x = "[0-9a-f]"; # hex character
+ $xs = "[0-9a-f ]"; # hex character or space
+ if ($arch eq 'arm') {
+ #c0008ffc: e24dd064 sub sp, sp, #100 ; 0x64
+ $re = qr/.*sub.*sp, sp, #(([0-9]{2}|[3-9])[0-9]{2})/o;
+ } elsif ($arch eq 'avr32') {
+ #8000008a: 20 1d sub sp,4
+ #80000ca8: fa cd 05 b0 sub sp,sp,1456
+ $re = qr/^.*sub.*sp.*,([0-9]{1,8})/o;
+ } elsif ($arch =~ /^i[3456]86$/) {
#c0105234: 81 ec ac 05 00 00 sub $0x5ac,%esp
- $re = qr/^.*(sub \$(0x$x),\%esp)$/o;
- $todec = sub { return hex($_[0]); };
- } elsif ($arch =~ 'x86_64') {
+ $re = qr/^.*[as][du][db] \$(0x$x{1,8}),\%esp$/o;
+ $dre = qr/^.*[as][du][db] (%.*),\%esp$/o;
+ } elsif ($arch eq 'x86_64') {
# 2f60: 48 81 ec e8 05 00 00 sub $0x5e8,%rsp
- $re = qr/^.*(add \$(0x$x),\%rsp)$/o;
- $todec = sub { return hex($_[0]); };
- } elsif ($arch =~ /^ia64$/) {
+ $re = qr/^.*[as][du][db] \$(0x$x{1,8}),\%rsp$/o;
+ $dre = qr/^.*[as][du][db] (\%.*),\%rsp$/o;
+ } elsif ($arch eq 'ia64') {
#e0000000044011fc: 01 0f fc 8c adds r12=-384,r12
- $re = qr/.*(adds.*r12=-($d),r12)/o;
- $todec = sub { return $_[0]; };
- } elsif ($arch =~ /^mips64$/) {
+ $re = qr/.*adds.*r12=-(([0-9]{2}|[3-9])[0-9]{2}),r12/o;
+ } elsif ($arch eq 'm68k') {
+ # 2b6c: 4e56 fb70 linkw %fp,#-1168
+ # 1df770: defc ffe4 addaw #-28,%sp
+ $re = qr/.*(?:linkw %fp,|addaw )#-([0-9]{1,4})(?:,%sp)?$/o;
+ } elsif ($arch eq 'mips64') {
#8800402c: 67bdfff0 daddiu sp,sp,-16
- $re = qr/.*(daddiu.*sp,sp,-($d))/o;
- $todec = sub { return $_[0]; };
- } elsif ($arch =~ /^mips$/) {
+ $re = qr/.*daddiu.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o;
+ } elsif ($arch eq 'mips') {
#88003254: 27bdffe0 addiu sp,sp,-32
- $re = qr/.*(addiu.*sp,sp,-($d))/o;
- $todec = sub { return $_[0]; };
- } elsif ($arch =~ /^ppc$/) {
+ $re = qr/.*addiu.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o;
+ } elsif ($arch eq 'parisc' || $arch eq 'parisc64') {
+ $re = qr/.*ldo ($x{1,8})\(sp\),sp/o;
+ } elsif ($arch eq 'ppc') {
#c00029f4: 94 21 ff 30 stwu r1,-208(r1)
- $re = qr/.*(stwu.*r1,-($x)\(r1\))/o;
- $todec = sub { return hex($_[0]); };
+ $re = qr/.*stwu.*r1,-($x{1,8})\(r1\)/o;
+ } elsif ($arch eq 'ppc64') {
+ #XXX
+ $re = qr/.*stdu.*r1,-($x{1,8})\(r1\)/o;
+ } elsif ($arch eq 'powerpc') {
+ $re = qr/.*st[dw]u.*r1,-($x{1,8})\(r1\)/o;
} elsif ($arch =~ /^s390x?$/) {
# 11160: a7 fb ff 60 aghi %r15,-160
- $re = qr/.*(ag?hi.*\%r15,-($d))/o;
- $todec = sub { return $_[0]; };
+ # or
+ # 100092: e3 f0 ff c8 ff 71 lay %r15,-56(%r15)
+ $re = qr/.*(?:lay|ag?hi).*\%r15,-(([0-9]{2}|[3-9])[0-9]{2})
+ (?:\(\%r15\))?$/ox;
+ } elsif ($arch =~ /^sh64$/) {
+ #XXX: we only check for the immediate case presently,
+ # though we will want to check for the movi/sub
+ # pair for larger users. -- PFM.
+ #a00048e0: d4fc40f0 addi.l r15,-240,r15
+ $re = qr/.*addi\.l.*r15,-(([0-9]{2}|[3-9])[0-9]{2}),r15/o;
+ } elsif ($arch =~ /^blackfin$/) {
+ # 0: 00 e8 38 01 LINK 0x4e0;
+ $re = qr/.*[[:space:]]LINK[[:space:]]*(0x$x{1,8})/o;
+ } elsif ($arch eq 'sparc' || $arch eq 'sparc64') {
+ # f0019d10: 9d e3 bf 90 save %sp, -112, %sp
+ $re = qr/.*save.*%sp, -(([0-9]{2}|[3-9])[0-9]{2}), %sp/o;
} else {
- print "Usage: objdump -d vmlinux | checkstack.pl [arch]\n";
- print "where arch is i386, ia64, mips, mips64, ppc, or s390\n";
- print "Each output line gives a function's stack usage, name\n";
- print "Lines are output in order of decreasing stack usage\n";
- die("wrong or unknown architecture\n");
+ print("wrong or unknown architecture \"$arch\"\n");
+ exit
}
}
-$funcre = qr/^[0-9a-f]* \<(.*)\>:$/;
-while ($line = <STDIN>) {
+sub bysize($) {
+ my ($asize, $bsize);
+ ($asize = $a) =~ s/.*: *(.*)$/$1/;
+ ($bsize = $b) =~ s/.*: *(.*)$/$1/;
+ $bsize <=> $asize
+}
+
+#
+# main()
+#
+my $funcre = qr/^$x* <(.*)>:$/;
+my $func;
+my $file, $lastslash;
+
+while (my $line = <STDIN>) {
if ($line =~ m/$funcre/) {
- ($func = $line) =~ s/$funcre/\1/;
- chomp($func);
+ $func = $1;
}
- if ($line =~ m/$re/) {
- push(@stack, &$todec($2)." ".$func);
- # don't expect more than one stack allocation per function
- $func .= " ** bug **";
+ elsif ($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 ($size =~ /^0x/);
+
+ if ($size > 0xf0000000) {
+ $size = - $size;
+ $size += 0x80000000;
+ $size += 0x80000000;
+ }
+ next if ($size > 0x10000000);
-foreach (sort { $b - $a } (@stack)) {
- print $_."\n";
+ next if $line !~ m/^($xs*)/;
+ my $addr = $1;
+ $addr =~ s/ /0/g;
+ $addr = "0x$addr";
+
+# my $intro = "$addr $func [$file]:";
+# my $padlen = 56 - length($intro);
+# while ($padlen > 0) {
+# $intro .= ' ';
+# $padlen -= 8;
+# }
+# next if ($size < 100);
+# push @stack, "$intro$size\n";
+ push @stack, "$size $file:$func\n";
+ }
+ elsif (defined $dre && $line =~ m/$dre/) {
+ my $size = "Dynamic ($1)";
+
+ next if $line !~ m/^($xs*)/;
+ my $addr = $1;
+ $addr =~ s/ /0/g;
+ $addr = "0x$addr";
+
+# my $intro = "$addr $func [$file]:";
+# my $padlen = 56 - length($intro);
+# while ($padlen > 0) {
+# $intro .= ' ';
+# $padlen -= 8;
+# }
+# push @stack, "$intro$size\n";
+ push @stack, "$size $file:$func\n";
+ }
}
+
+print sort bysize @stack;
git://git.whamcloud.com / fs / lustre-release.git / blobdiff