From 3a76313bfbbd344cd4588da4314901882a609ecf Mon Sep 17 00:00:00 2001 From: Andrew Morton Date: Fri, 28 May 2004 20:56:36 -0700 Subject: [PATCH] Add `make checkstack' target MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Jorn Engel Adds a `make checkstack' target. This disassembles and parses vmlinux and *.ko, generating a sorted list of stack hogs, eg: 0xc0100663 huft_build: 1456 0xc01022d3 huft_build: 1456 0xc0103127 inflate_dynamic: 1328 0xc0101487 inflate_dynamic: 1324 0xc010131f inflate_fixed: 1168 0xc0102fb7 inflate_fixed: 1168 0x00000003 sha512_transform: 984 0xc024aee3 Vpd: 952 0x00000003 twofish_setkey: 804 0x000060c3 isd200_action: 792 0x0000e6cb nfsd4_proc_compound: 760 0xc0249087 SkPnmiGetStruct: 712 .... Supported architectures are alleged to be arm, x86, ia64, mips, mips64, ppc, ppc64 and s390x. Signed-off-by: Jörn Engel Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- scripts/checkstack.pl | 101 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 101 insertions(+) create mode 100644 scripts/checkstack.pl (limited to 'scripts/checkstack.pl') diff --git a/scripts/checkstack.pl b/scripts/checkstack.pl new file mode 100644 index 000000000000..e16d5d0fb0ea --- /dev/null +++ b/scripts/checkstack.pl @@ -0,0 +1,101 @@ +#!/usr/bin/perl + +# Check the stack usage of functions +# +# Copyright Joern Engel +# Inspired by Linus Torvalds +# Original idea maybe from Keith Owens +# s390 port and big speedup by Arnd Bergmann +# Mips port by Juan Quintela +# IA64 port via Andreas Dilger +# Arm port by Holger Schurig +# Random bits by Matt Mackall +# +# Usage: +# objdump -d vmlinux | stackcheck_ppc.pl [arch] +# +# TODO : Port to all architectures (one regex per arch) + +# check for arch +# +# $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 +# +# use anything else and feel the pain ;) +{ + my $arch = shift; + if ($arch eq "") { + $arch = `uname -m`; + } + + $x = "[0-9a-f]"; # hex character + $xs = "[0-9a-f ]"; # hex character or space + if ($arch =~ /^arm$/) { + #c0008ffc: e24dd064 sub sp, sp, #100 ; 0x64 + $re = qr/.*sub.*sp, sp, #(([0-9]{2}|[3-9])[0-9]{2})/o; + } elsif ($arch =~ /^i[3456]86$/) { + #c0105234: 81 ec ac 05 00 00 sub $0x5ac,%esp + $re = qr/^.*sub \$(0x$x{3,5}),\%esp$/o; + } elsif ($arch =~ /^ia64$/) { + #e0000000044011fc: 01 0f fc 8c adds r12=-384,r12 + $re = qr/.*adds.*r12=-(([0-9]{2}|[3-9])[0-9]{2}),r12/o; + } elsif ($arch =~ /^mips64$/) { + #8800402c: 67bdfff0 daddiu sp,sp,-16 + $re = qr/.*daddiu.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o; + } elsif ($arch =~ /^mips$/) { + #88003254: 27bdffe0 addiu sp,sp,-32 + $re = qr/.*addiu.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o; + } elsif ($arch =~ /^ppc$/) { + #c00029f4: 94 21 ff 30 stwu r1,-208(r1) + $re = qr/.*stwu.*r1,-($x{3,5})\(r1\)/o; + } elsif ($arch =~ /^ppc64$/) { + #XXX + $re = qr/.*stdu.*r1,-($x{3,5})\(r1\)/o; + } elsif ($arch =~ /^s390x?$/) { + # 11160: a7 fb ff 60 aghi %r15,-160 + $re = qr/.*ag?hi.*\%r15,-(([0-9]{2}|[3-9])[0-9]{2})/o; + } else { + print("wrong or unknown architecture\n"); + exit + } +} + +sub bysize($) { + ($asize = $a) =~ s/.* +(.*)$/$1/; + ($bsize = $b) =~ s/.* +(.*)$/$1/; + $bsize <=> $asize +} + +# +# main() +# +$funcre = qr/^$x* \<(.*)\>:$/; +while ($line = ) { + if ($line =~ m/$funcre/) { + $func = $1; + } + if ($line =~ m/$re/) { + my $size = $1; + $size = hex($size) if ($size =~ /^0x/); + + $line =~ m/^($xs*).*/; + my $addr = $1; + $addr =~ s/ /0/g; + $addr = "0x$addr"; + + my $intro = "$addr $func:"; + my $padlen = 56 - length($intro); + while ($padlen > 0) { + $intro .= ' '; + $padlen -= 8; + } + $stack[@stack] = "$intro$size\n"; + } +} + +@sortedstack = sort bysize @stack; + +foreach $i (@sortedstack) { + print("$i"); +} -- cgit v1.2.3