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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 22:20:36 (GMT)
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 22:20:36 (GMT)
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /scripts/checkstack.pl
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'scripts/checkstack.pl')
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diff --git a/scripts/checkstack.pl b/scripts/checkstack.pl
new file mode 100644
index 0000000..dadfa20
--- /dev/null
+++ b/scripts/checkstack.pl
@@ -0,0 +1,123 @@
+#!/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
+# sh64 port by Paul Mundt
+# Random bits by Matt Mackall <mpm@selenic.com>
+# M68k port by Geert Uytterhoeven and Andreas Schwab
+#
+# Usage:
+# objdump -d vmlinux | stackcheck.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 (@stack, $re, $x, $xs);
+{
+ 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 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 =~ /^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 eq 'x86_64') {
+ # 2f60: 48 81 ec e8 05 00 00 sub $0x5e8,%rsp
+ $re = qr/^.*[as][du][db] \$(0x$x{1,8}),\%rsp$/o;
+ } elsif ($arch eq '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 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
+ $re = qr/.*daddiu.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o;
+ } elsif ($arch eq 'mips') {
+ #88003254: 27bdffe0 addiu sp,sp,-32
+ $re = qr/.*addiu.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o;
+ } elsif ($arch eq 'ppc') {
+ #c00029f4: 94 21 ff 30 stwu r1,-208(r1)
+ $re = qr/.*stwu.*r1,-($x{1,8})\(r1\)/o;
+ } elsif ($arch eq 'ppc64') {
+ #XXX
+ $re = qr/.*stdu.*r1,-($x{1,8})\(r1\)/o;
+ } elsif ($arch =~ /^s390x?$/) {
+ # 11160: a7 fb ff 60 aghi %r15,-160
+ $re = qr/.*ag?hi.*\%r15,-(([0-9]{2}|[3-9])[0-9]{2})/o;
+ } elsif ($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
+ $re = qr/.*addi\.l.*r15,-(([0-9]{2}|[3-9])[0-9]{2}),r15/o;
+ } else {
+ print("wrong or unknown architecture\n");
+ exit
+ }
+}
+
+sub bysize($) {
+ my ($asize, $bsize);
+ ($asize = $a) =~ s/.*: *(.*)$/$1/;
+ ($bsize = $b) =~ s/.*: *(.*)$/$1/;
+ $bsize <=> $asize
+}
+
+#
+# main()
+#
+my $funcre = qr/^$x* <(.*)>:$/;
+my $func;
+while (my $line = <STDIN>) {
+ if ($line =~ m/$funcre/) {
+ $func = $1;
+ }
+ if ($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);
+
+ next if $line !~ m/^($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);
+ push @stack, "$intro$size\n";
+ }
+}
+
+print sort bysize @stack;

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