This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / scripts / checkstack.pl

diff --git a/scripts/checkstack.pl b/scripts/checkstack.pl
new file mode 100644 (file)
index 0000000..df85c66
--- /dev/null
+++ b/scripts/checkstack.pl
@@ -0,0 +1,108 @@
+#!/usr/bin/perl
+
+#      Check the stack usage of functions
+#
+#      Copyright Joern Engel <joern@wh.fh-wedel.de>
+#      Inspired by Linus Torvalds
+#      Original idea maybe from Keith Owens
+#      s390 port and big speedup by Arnd Bergmann <arnd@bergmann-dalldorf.de>
+#      Mips port by Juan Quintela <quintela@mandrakesoft.com>
+#      IA64 port via Andreas Dilger
+#      Arm port by Holger Schurig
+#      Random bits by Matt Mackall <mpm@selenic.com>
+#
+#      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
+               $re = qr/^.*[as][du][db]    \$(0x$x{1,8}),\%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{1,8})\(r1\)/o;
+       } elsif ($arch =~ /^ppc64$/) {
+               #XXX
+               $re = qr/.*stdu.*r1,-($x{1,8})\(r1\)/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 ($line = <STDIN>) {
+       if ($line =~ m/$funcre/) {
+               $func = $1;
+       }
+       if ($line =~ m/$re/) {
+               my $size = $1;
+               $size = hex($size) if ($size =~ /^0x/);
+
+               if ($size > 0x80000000) {
+                       $size = - $size;
+                       $size += 0x80000000;
+                       $size += 0x80000000;
+               }
+
+               $line =~ m/^($xs*).*/;
+               my $addr = $1;
+               $addr =~ s/ /0/g;
+               $addr = "0x$addr";
+
+               my $intro = "$addr $func:";
+               my $padlen = 56 - length($intro);
+               while ($padlen > 0) {
+                       $intro .= '     ';
+                       $padlen -= 8;
+               }
+               next if ($size < 100);
+               $stack[@stack] = "$intro$size\n";
+       }
+}
+
+@sortedstack = sort bysize @stack;
+
+foreach $i (@sortedstack) {
+       print("$i");
+}