X-Git-Url: https://git.whamcloud.com/?a=blobdiff_plain;f=build%2Fcheckstack.pl;h=d35b58aec492de91627d2eaaf5230c7a9db83de8;hb=02e966562db2781c7ee5b033ea104cd38f83dced;hp=3504e96ac63cedf1cd5c439dec4483e44c660a0c;hpb=c3df928cd9f2ff66449954c49ae2ed8a3bcf68d0;p=fs%2Flustre-release.git diff --git a/build/checkstack.pl b/build/checkstack.pl index 3504e96..d35b58a 100644 --- a/build/checkstack.pl +++ b/build/checkstack.pl @@ -1,83 +1,182 @@ #!/usr/bin/perl + # Check the stack usage of functions # -# Copyright Joern Engel +# Copyright Joern Engel # Inspired by Linus Torvalds # Original idea maybe from Keith Owens # s390 port and big speedup by Arnd Bergmann -# Modified to have simpler output format by Dan Kegel +# Mips port by Juan Quintela +# IA64 port via Andreas Dilger +# Arm port by Holger Schurig +# sh64 port by Paul Mundt +# Random bits by Matt Mackall +# M68k port by Geert Uytterhoeven and Andreas Schwab +# AVR32 port by Haavard Skinnemoen +# PARISC port by Kyle McMartin +# sparc port by Martin Habets # # Usage: -# objdump -d vmlinux | stackcheck.pl [arch] +# objdump -d vmlinux | scripts/checkstack.pl [arch] # # find -name "*.o" | while read M; do # objdump -d $M | perl ~/checkstack.pl | \ # 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]{3,5}"; # 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 ($arch =~ /^ia64$/) { + $re = qr/^.*[as][du][db] \$(0x$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 + $re = qr/^.*[as][du][db] \$(0x$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 ($line = ) { +sub bysize($) { + 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 $line = ) { if ($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;