-#!/usr/bin/perl
+#!/usr/bin/env perl
+# SPDX-License-Identifier: GPL-2.0
# Check the stack usage of functions
#
# sh64 port by Paul Mundt
# Random bits by Matt Mackall <mpm@selenic.com>
# M68k port by Geert Uytterhoeven and Andreas Schwab
-# AVR32 port by Haavard Skinnemoen <hskinnemoen@atmel.com>
-# PARISC port by Kyle McMartin <kyle@parisc-linux.org>
+# AArch64, PARISC ports by Kyle McMartin
# sparc port by Martin Habets <errandir_news@mph.eclipse.co.uk>
+# ppc64le port by Breno Leitao <leitao@debian.org>
+# riscv port by Wadim Mueller <wafgo01@gmail.com>
#
# Usage:
# objdump -d vmlinux | scripts/checkstack.pl [arch]
#
-# find <moduledir> -name "*.o" | while read M; do
-# objdump -d $M | perl ~/checkstack.pl <arch> | \
-# sed "s/^/`basename $M`: /" ; done | \
-# awk '/esp/ { print $5, $2, $4 }' | sort -nr
# TODO : Port to all architectures (one regex per arch)
+use strict;
+
# 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 dynamic amount of the stack growth
#
+# $sub: subroutine for special handling to check stack usage.
+#
# use anything else and feel the pain ;)
-my (@stack, $re, $dre, $x, $xs);
+my (@stack, $re, $dre, $sub, $x, $xs, $funcre, $min_stack);
{
my $arch = shift;
if ($arch eq "") {
chomp($arch);
}
+ $min_stack = shift;
+ if ($min_stack eq "" || $min_stack !~ /^\d+$/) {
+ $min_stack = 100;
+ }
+
$x = "[0-9a-f]"; # hex character
$xs = "[0-9a-f ]"; # hex character or space
- if ($arch eq 'arm') {
+ $funcre = qr/^$x* <(.*)>:$/;
+ if ($arch =~ '^(aarch|arm)64$') {
+ #ffffffc0006325cc: a9bb7bfd stp x29, x30, [sp, #-80]!
+ #a110: d11643ff sub sp, sp, #0x590
+ $re = qr/^.*stp.*sp, \#-([0-9]{1,8})\]\!/o;
+ $dre = qr/^.*sub.*sp, sp, #(0x$x{1,8})/o;
+ } elsif ($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$/) {
+ $re = qr/.*sub.*sp, sp, #([0-9]{1,4})/o;
+ $sub = \&arm_push_handling;
+ } elsif ($arch =~ /^x86(_64)?$/ || $arch =~ /^i[3456]86$/) {
#c0105234: 81 ec ac 05 00 00 sub $0x5ac,%esp
- $re = qr/^.*[as][du][db] \$(0x$x{1,8}),\%esp$/o;
- $dre = qr/^.*[as][du][db] (%.*),\%esp$/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;
+ # or
+ # 2f60: 48 81 ec e8 05 00 00 sub $0x5e8,%rsp
+ $re = qr/^.*[as][du][db] \$(0x$x{1,8}),\%(e|r)sp$/o;
+ $dre = qr/^.*[as][du][db] (%.*),\%(e|r)sp$/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 'mips') {
#88003254: 27bdffe0 addiu sp,sp,-32
$re = qr/.*addiu.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o;
+ } elsif ($arch eq 'nios2') {
+ #25a8: defffb04 addi sp,sp,-20
+ $re = qr/.*addi.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o;
+ } elsif ($arch eq 'openrisc') {
+ # c000043c: 9c 21 fe f0 l.addi r1,r1,-272
+ $re = qr/.*l\.addi.*r1,r1,-(([0-9]{2}|[3-9])[0-9]{2})/o;
} elsif ($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{1,8})\(r1\)/o;
- } elsif ($arch eq 'ppc64') {
- #XXX
- $re = qr/.*stdu.*r1,-($x{1,8})\(r1\)/o;
- } elsif ($arch eq 'powerpc') {
+ } elsif ($arch eq 'powerpc' || $arch =~ /^ppc(64)?(le)?$/ ) {
+ # powerpc : 94 21 ff 30 stwu r1,-208(r1)
+ # ppc64(le) : 81 ff 21 f8 stdu r1,-128(r1)
$re = qr/.*st[dw]u.*r1,-($x{1,8})\(r1\)/o;
} elsif ($arch =~ /^s390x?$/) {
# 11160: a7 fb ff 60 aghi %r15,-160
# 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
$re = qr/.*save.*%sp, -(([0-9]{2}|[3-9])[0-9]{2}), %sp/o;
+ } elsif ($arch =~ /^riscv(64)?$/) {
+ #ffffffff8036e868: c2010113 addi sp,sp,-992
+ $re = qr/.*addi.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o;
} else {
print("wrong or unknown architecture \"$arch\"\n");
exit
}
}
-sub bysize($) {
- my ($asize, $bsize);
- ($asize = $a) =~ s/.*: *(.*)$/$1/;
- ($bsize = $b) =~ s/.*: *(.*)$/$1/;
- $bsize <=> $asize
+#
+# To count stack usage of push {*, fp, ip, lr, pc} instruction in ARM,
+# if FRAME POINTER is enabled.
+# e.g. c01f0d48: e92ddff0 push {r4, r5, r6, r7, r8, r9, sl, fp, ip, lr, pc}
+#
+sub arm_push_handling {
+ my $regex = qr/.*push.*fp, ip, lr, pc}/o;
+ my $size = 0;
+ my $line_arg = shift;
+
+ if ($line_arg =~ m/$regex/) {
+ $size = $line_arg =~ tr/,//;
+ $size = ($size + 1) * 4;
+ }
+
+ return $size;
}
#
# main()
#
-my $funcre = qr/^$x* <(.*)>:$/;
-my $func;
-my $file, $lastslash;
+my ($func, $file, $lastslash, $total_size, $addr, $intro);
+
+$total_size = 0;
while (my $line = <STDIN>) {
if ($line =~ m/$funcre/) {
$func = $1;
+ next if $line !~ m/^($xs*)/;
+ if ($total_size > $min_stack) {
+ push @stack, "$intro$total_size\n";
+ }
+
+ $addr = $1;
+ $addr =~ s/ /0/g;
+ $addr = "0x$addr";
+
+ $intro = "$addr $func [$file]:";
+ my $padlen = 56 - length($intro);
+ while ($padlen > 0) {
+ $intro .= ' ';
+ $padlen -= 8;
+ }
+
+ $total_size = 0;
}
elsif ($line =~ m/(.*):\s*file format/) {
$file = $1;
}
next if ($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";
- push @stack, "$size $file:$func\n";
+ $total_size += $size;
}
elsif (defined $dre && $line =~ m/$dre/) {
- my $size = "Dynamic ($1)";
+ my $size = $1;
- next if $line !~ m/^($xs*)/;
- my $addr = $1;
- $addr =~ s/ /0/g;
- $addr = "0x$addr";
+ $size = hex($size) if ($size =~ /^0x/);
+ $total_size += $size;
+ }
+ elsif (defined $sub) {
+ my $size = &$sub($line);
-# 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";
+ $total_size += $size;
}
}
+if ($total_size > $min_stack) {
+ push @stack, "$intro$total_size\n";
+}
-print sort bysize @stack;
+# Sort output by size (last field)
+print sort { ($b =~ /:\t*(\d+)$/)[0] <=> ($a =~ /:\t*(\d+)$/)[0] } @stack;
git://git.whamcloud.com / fs / lustre-release.git / blobdiff