Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Wed, 5 Mar 2003 12:03:32 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 5 Mar 2003 12:03:32 -0500 Received: from wohnheim.fh-wedel.de ([195.37.86.122]:17366 "EHLO wohnheim.fh-wedel.de") by vger.kernel.org with ESMTP id ; Wed, 5 Mar 2003 12:03:29 -0500 Date: Wed, 5 Mar 2003 18:14:01 +0100 From: =?iso-8859-1?Q?J=F6rn?= Engel To: linux-kernel@vger.kernel.org Subject: Re: [PATCH] add checkstack Makefile target Message-ID: <20030305171401.GA24165@wohnheim.fh-wedel.de> References: <20030303211647.GA25205@wohnheim.fh-wedel.de> <20030304070304.GP4579@actcom.co.il> <20030304072443.GA5503@wohnheim.fh-wedel.de> <20030304102121.GC6583@wohnheim.fh-wedel.de> <20030304105739.GD6583@wohnheim.fh-wedel.de> <20030304190854.GA1917@mars.ravnborg.org> <20030305145149.GA7509@wohnheim.fh-wedel.de> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20030305145149.GA7509@wohnheim.fh-wedel.de> User-Agent: Mutt/1.3.28i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3408 Lines: 120 Yet another version: - Arch dependent code is reduced to one regular expression. - Much shorter. - A tiny bit faster. Still, Keith' code beats the crap out of mine, speed-wise. J?rn -- Rules of Optimization: Rule 1: Don't do it. Rule 2 (for experts only): Don't do it yet. -- M.A. Jackson diff -Naur linux-2.5.63/arch/i386/Makefile linux-2.5.63-csb1/arch/i386/Makefile --- linux-2.5.63/arch/i386/Makefile Mon Feb 24 20:05:15 2003 +++ linux-2.5.63-csb1/arch/i386/Makefile Wed Mar 5 14:18:51 2003 @@ -124,3 +124,6 @@ echo ' install to $$(INSTALL_PATH) and run lilo' endef +checkstack: vmlinux + $(OBJDUMP) -d vmlinux | \ + scripts/checkstack.pl $(ARCH) diff -Naur linux-2.5.63/arch/ppc/Makefile linux-2.5.63-csb1/arch/ppc/Makefile --- linux-2.5.63/arch/ppc/Makefile Mon Feb 24 20:05:06 2003 +++ linux-2.5.63-csb1/arch/ppc/Makefile Wed Mar 5 14:18:38 2003 @@ -109,3 +109,7 @@ CLEAN_FILES += include/asm-$(ARCH)/offsets.h.tmp \ include/asm-$(ARCH)/offsets.h \ arch/$(ARCH)/kernel/asm-offsets.s + +checkstack: vmlinux + $(OBJDUMP) -d vmlinux | \ + scripts/checkstack.pl $(ARCH) diff -Naur linux-2.5.63/scripts/checkstack.pl linux-2.5.63-csb1/scripts/checkstack.pl --- linux-2.5.63/scripts/checkstack.pl Thu Jan 1 01:00:00 1970 +++ linux-2.5.63-csb1/scripts/checkstack.pl Wed Mar 5 18:04:19 2003 @@ -0,0 +1,75 @@ +#!/usr/bin/perl + +# Check the stack usage of functions +# +# Copyright Joern Engel +# Inspired by Linus Torvalds +# Original idea maybe from Keith Owens +# +# Usage: +# objdump -d vmlinux | \ +# stackcheck_ppc.pl +# +# TODO : Port to all architectures (one regex per arch) +# Speed this puppy up + +# check for arch +# +# $re is used for three matches: +# $& (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 +# +# use anything else and feel the pain ;) +{ + my $arch = shift; + $x = "[0-9a-f]"; # hex character + $X = "[0-9a-fA-F]"; # hex character + if ($arch =~ /^i386$/) { + #c0105234: 81 ec ac 05 00 00 sub $0x5ac,%esp + $re = qr/^$x{8}:\t.. .. .. .. .. .. \t(sub \$(0x$x{3,5}),\%esp)$/o; + } elsif ($arch =~ /^ppc$/) { + #c00029f4: 94 21 ff 30 stwu r1,-208(r1) + $re = qr/.*(stwu.*r1,-($x{3,5})$r1$)/o; + } else { + print "wrong or unknown architecture\n"; + exit + } +} + +sub bysize($) { + ($asize = $a) =~ s/$re/\2/; + ($bsize = $b) =~ s/$re/\2/; + $bsize <=> $asize +} + +# +# main() +# +while (defined($line = )) { + if ($line =~ m/$re/) { + (my $addr = $line) =~ s/^($x{8}).*/0x\1/o; + chomp($addr); + + my $ksymoops = `ksymoops -v vmlinux -m System.map -K -L -O -A $addr | \ + tail -2 | head -1`; + (my $func = $ksymoops) =~ s/^Adhoc [0-9a-f]{8} (<.*>)/\1/; + chomp($func); + + my $intro = "$addr $func:"; + my $padlen = 56 - length($intro); + while ($padlen > 0) { + $intro .= ' '; + $padlen -= 8; + } + (my $code = $line) =~ s/$re/\1/; + + $stack[@stack] = "$intro $code"; + } +} + +@sortedstack = sort bysize @stack; + +foreach $i (@sortedstack) { + print("$i"); +} - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/