d4fea900b
Denis Vlasenko
2007-06-10
Subject
add script which measures stack consumption.
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Makefile.custom+5 -1
| @@ -79,9 +79,13 @@ baseline: busybox_unstripped | |
| objsizes: busybox_unstripped | |
| $(srctree)/scripts/objsizes | |
| + | .PHONY: stksizes |
| + | stksizes: busybox_unstripped |
| + | $(CROSS_COMPILE)objdump -d busybox_unstripped | $(srctree)/scripts/checkstack.pl $(ARCH) |
| + | |
| .PHONY: bigdata | |
| bigdata: busybox_unstripped | |
| - | nm --size-sort busybox_unstripped | grep -vi ' [tr] ' | tail -20 |
| + | $(CROSS_COMPILE)nm --size-sort busybox_unstripped | grep -vi ' [tr] ' |
| # Documentation Targets | |
| .PHONY: doc | |
Makefile.help+2 -0
| @@ -39,4 +39,6 @@ help: | |
| @echo ' release - create a distribution tarball' | |
| @echo ' sizes - show size of all enabled busybox symbols' | |
| @echo ' objsizes - show size of each .o object built' | |
| + | @echo ' bigdata - show data objects, biggest first' |
| + | @echo ' stksizes - show stack users, biggest first' |
| @echo | |
scripts/checkstack.pl+137 -0
| @@ -0,0 +1,137 @@ | |
| + | #!/usr/bin/perl |
| + | |
| + | # Stolen from Linux kernel :) |
| + | |
| + | # Check the stack usage of functions |
| + | # |
| + | # Copyright Joern Engel <[email protected]> |
| + | # Inspired by Linus Torvalds |
| + | # Original idea maybe from Keith Owens |
| + | # s390 port and big speedup by Arnd Bergmann <[email protected]> |
| + | # Mips port by Juan Quintela <[email protected]> |
| + | # IA64 port via Andreas Dilger |
| + | # Arm port by Holger Schurig |
| + | # sh64 port by Paul Mundt |
| + | # Random bits by Matt Mackall <[email protected]> |
| + | # M68k port by Geert Uytterhoeven and Andreas Schwab |
| + | # |
| + | # Usage: |
| + | # objdump -d vmlinux | checkstack.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 eq 'powerpc') { |
| + | $re = qr/.*st[dw]u.*r1,-($x{1,8})\(r1\)/o; |
| + | } elsif ($arch =~ /^s390x?$/) { |
| + | # 11160: a7 fb ff 60 aghi %r15,-160 |
| + | $re = qr/.*ag?hi.*\%r15,-(([0-9]{2}|[3-9])[0-9]{2})/o; |
| + | } elsif ($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; |
| + | my $file, $lastslash; |
| + | |
| + | while (my $line = <STDIN>) { |
| + | if ($line =~ m/$funcre/) { |
| + | $func = $1; |
| + | } |
| + | elsif ($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); |
| + | |
| + | 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"; |
| + | } |
| + | } |
| + | |
| + | print sort bysize @stack; |