3 # Stolen from Linux kernel :)
5 # Check the stack usage of functions
7 # Copyright Joern Engel <joern@wh.fh-wedel.de>
8 # Inspired by Linus Torvalds
9 # Original idea maybe from Keith Owens
10 # s390 port and big speedup by Arnd Bergmann <arnd@bergmann-dalldorf.de>
11 # Mips port by Juan Quintela <quintela@mandrakesoft.com>
12 # IA64 port via Andreas Dilger
13 # Arm port by Holger Schurig
14 # sh64 port by Paul Mundt
15 # Random bits by Matt Mackall <mpm@selenic.com>
16 # M68k port by Geert Uytterhoeven and Andreas Schwab
19 # objdump -d vmlinux | checkstack.pl [arch]
21 # TODO : Port to all architectures (one regex per arch)
25 # $re is used for two matches:
26 # $& (whole re) matches the complete objdump line with the stack growth
27 # $1 (first bracket) matches the size of the stack growth
29 # use anything else and feel the pain ;)
30 my (@stack, $re, $x, $xs);
37 $x = "[0-9a-f]"; # hex character
38 $xs = "[0-9a-f ]"; # hex character or space
40 #c0008ffc: e24dd064 sub sp, sp, #100 ; 0x64
41 $re = qr/.*sub.*sp, sp, #(([0-9]{2}|[3-9])[0-9]{2})/o;
42 } elsif ($arch =~ /^i[3456]86$/) {
43 #c0105234: 81 ec ac 05 00 00 sub $0x5ac,%esp
44 $re = qr/^.*[as][du][db] \$(0x$x{1,8}),\%esp$/o;
45 } elsif ($arch eq 'x86_64') {
46 # 2f60: 48 81 ec e8 05 00 00 sub $0x5e8,%rsp
47 $re = qr/^.*[as][du][db] \$(0x$x{1,8}),\%rsp$/o;
48 } elsif ($arch eq 'ia64') {
49 #e0000000044011fc: 01 0f fc 8c adds r12=-384,r12
50 $re = qr/.*adds.*r12=-(([0-9]{2}|[3-9])[0-9]{2}),r12/o;
51 } elsif ($arch eq 'm68k') {
52 # 2b6c: 4e56 fb70 linkw %fp,#-1168
53 # 1df770: defc ffe4 addaw #-28,%sp
54 $re = qr/.*(?:linkw %fp,|addaw )#-([0-9]{1,4})(?:,%sp)?$/o;
55 } elsif ($arch eq 'mips64') {
56 #8800402c: 67bdfff0 daddiu sp,sp,-16
57 $re = qr/.*daddiu.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o;
58 } elsif ($arch eq 'mips') {
59 #88003254: 27bdffe0 addiu sp,sp,-32
60 $re = qr/.*addiu.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o;
61 } elsif ($arch eq 'ppc') {
62 #c00029f4: 94 21 ff 30 stwu r1,-208(r1)
63 $re = qr/.*stwu.*r1,-($x{1,8})\(r1\)/o;
64 } elsif ($arch eq 'ppc64') {
66 $re = qr/.*stdu.*r1,-($x{1,8})\(r1\)/o;
67 } elsif ($arch eq 'powerpc') {
68 $re = qr/.*st[dw]u.*r1,-($x{1,8})\(r1\)/o;
69 } elsif ($arch =~ /^s390x?$/) {
70 # 11160: a7 fb ff 60 aghi %r15,-160
71 $re = qr/.*ag?hi.*\%r15,-(([0-9]{2}|[3-9])[0-9]{2})/o;
72 } elsif ($arch =~ /^sh64$/) {
73 #XXX: we only check for the immediate case presently,
74 # though we will want to check for the movi/sub
75 # pair for larger users. -- PFM.
76 #a00048e0: d4fc40f0 addi.l r15,-240,r15
77 $re = qr/.*addi\.l.*r15,-(([0-9]{2}|[3-9])[0-9]{2}),r15/o;
79 print("wrong or unknown architecture\n");
86 ($asize = $a) =~ s/.*: *(.*)$/$1/;
87 ($bsize = $b) =~ s/.*: *(.*)$/$1/;
94 my $funcre = qr/^$x* <(.*)>:$/;
98 while (my $line = <STDIN>) {
99 if ($line =~ m/$funcre/) {
102 elsif ($line =~ m/(.*):\s*file format/) {
105 $lastslash = rindex($file, "/");
106 if ($lastslash != -1) {
107 $file = substr($file, $lastslash + 1);
110 elsif ($line =~ m/$re/) {
112 $size = hex($size) if ($size =~ /^0x/);
114 if ($size > 0xf0000000) {
119 next if ($size > 0x10000000);
121 next if $line !~ m/^($xs*)/;
126 my $intro = "$addr $func [$file]:";
127 my $padlen = 56 - length($intro);
128 while ($padlen > 0) {
132 next if ($size < 100);
133 push @stack, "$intro$size\n";
137 print sort bysize @stack;