checkstack: pull from upstream
merge upstream changes Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
This commit is contained in:
Bernhard Reutner-Fischer
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f59739a663
@ -1,10 +1,11 @@
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#!/usr/bin/perl
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#!/usr/bin/env perl
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# SPDX-License-Identifier: GPL-2.0
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# Stolen from Linux kernel :)
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# Check the stack usage of functions
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#
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# Copyright Joern Engel <joern@wh.fh-wedel.de>
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# Copyright Joern Engel <joern@lazybastard.org>
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# Inspired by Linus Torvalds
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# Original idea maybe from Keith Owens
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# s390 port and big speedup by Arnd Bergmann <arnd@bergmann-dalldorf.de>
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@ -14,41 +15,57 @@
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# sh64 port by Paul Mundt
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# Random bits by Matt Mackall <mpm@selenic.com>
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# M68k port by Geert Uytterhoeven and Andreas Schwab
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# blackfin port by Alex Landau
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# AArch64, PARISC ports by Kyle McMartin
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# sparc port by Martin Habets <errandir_news@mph.eclipse.co.uk>
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# ppc64le port by Breno Leitao <leitao@debian.org>
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#
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# Usage:
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# objdump -d vmlinux | checkstack.pl [arch]
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# objdump -d vmlinux | scripts/checkstack.pl [arch]
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#
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# TODO : Port to all architectures (one regex per arch)
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use strict;
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# check for arch
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#
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# $re is used for two matches:
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# $& (whole re) matches the complete objdump line with the stack growth
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# $1 (first bracket) matches the size of the stack growth
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#
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# $dre is similar, but for dynamic stack reductions:
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# $& (whole re) matches the complete objdump line with the stack growth
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# $1 (first bracket) matches the dynamic amount of the stack growth
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#
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# use anything else and feel the pain ;)
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my (@stack, $re, $x, $xs);
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my (@stack, $re, $dre, $x, $xs, $funcre);
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{
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my $arch = shift;
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if ($arch eq "") {
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$arch = `uname -m`;
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1 while chomp $arch;
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chomp($arch);
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}
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$x = "[0-9a-f]"; # hex character
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$xs = "[0-9a-f ]"; # hex character or space
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if ($arch eq 'arm') {
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$funcre = qr/^$x* <(.*)>:$/;
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if ($arch eq 'aarch64') {
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#ffffffc0006325cc: a9bb7bfd stp x29, x30, [sp, #-80]!
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#a110: d11643ff sub sp, sp, #0x590
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$re = qr/^.*stp.*sp, \#-([0-9]{1,8})\]\!/o;
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$dre = qr/^.*sub.*sp, sp, #(0x$x{1,8})/o;
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} elsif ($arch eq 'arm') {
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#c0008ffc: e24dd064 sub sp, sp, #100 ; 0x64
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$re = qr/.*sub.*sp, sp, #(([0-9]{2}|[3-9])[0-9]{2})/o;
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} elsif ($arch =~ /^x86(_64)?$/ || $arch =~ /^i[3456]86$/) {
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#c0105234: 81 ec ac 05 00 00 sub $0x5ac,%esp
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# or
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# 2f60: 48 81 ec e8 05 00 00 sub $0x5e8,%rsp
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$re = qr/^.*[as][du][db] \$(0x$x{1,8}),\%(e|r)sp$/o;
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$dre = qr/^.*[as][du][db] (%.*),\%(e|r)sp$/o;
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} elsif ($arch eq 'blackfin') {
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# 52: 00 e8 03 00 LINK 0xc;
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$re = qr/.*LINK (0x$x{1,5});$/o;
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} elsif ($arch =~ /^i[3456]86$/) {
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#c0105234: 81 ec ac 05 00 00 sub $0x5ac,%esp
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$re = qr/^.*[as][du][db] \$(0x$x{1,8}),\%esp$/o;
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} elsif ($arch eq 'x86_64') {
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# 2f60: 48 81 ec e8 05 00 00 sub $0x5e8,%rsp
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$re = qr/^.*[as][du][db] \$(0x$x{1,8}),\%rsp$/o;
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} elsif ($arch eq 'ia64') {
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#e0000000044011fc: 01 0f fc 8c adds r12=-384,r12
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$re = qr/.*adds.*r12=-(([0-9]{2}|[3-9])[0-9]{2}),r12/o;
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@ -62,42 +79,43 @@ my (@stack, $re, $x, $xs);
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} elsif ($arch eq 'mips') {
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#88003254: 27bdffe0 addiu sp,sp,-32
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$re = qr/.*addiu.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o;
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} elsif ($arch eq 'ppc') {
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#c00029f4: 94 21 ff 30 stwu r1,-208(r1)
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$re = qr/.*stwu.*r1,-($x{1,8})\(r1\)/o;
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} elsif ($arch eq 'ppc64') {
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#XXX
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$re = qr/.*stdu.*r1,-($x{1,8})\(r1\)/o;
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} elsif ($arch eq 'powerpc') {
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} elsif ($arch eq 'nios2') {
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#25a8: defffb04 addi sp,sp,-20
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$re = qr/.*addi.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o;
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} elsif ($arch eq 'openrisc') {
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# c000043c: 9c 21 fe f0 l.addi r1,r1,-272
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$re = qr/.*l\.addi.*r1,r1,-(([0-9]{2}|[3-9])[0-9]{2})/o;
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} elsif ($arch eq 'parisc' || $arch eq 'parisc64') {
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$re = qr/.*ldo ($x{1,8})\(sp\),sp/o;
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} elsif ($arch eq 'powerpc' || $arch =~ /^ppc(64)?(le)?$/ ) {
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# powerpc : 94 21 ff 30 stwu r1,-208(r1)
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# ppc64(le) : 81 ff 21 f8 stdu r1,-128(r1)
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$re = qr/.*st[dw]u.*r1,-($x{1,8})\(r1\)/o;
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} elsif ($arch =~ /^s390x?$/) {
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# 11160: a7 fb ff 60 aghi %r15,-160
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$re = qr/.*ag?hi.*\%r15,-(([0-9]{2}|[3-9])[0-9]{2})/o;
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# or
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# 100092: e3 f0 ff c8 ff 71 lay %r15,-56(%r15)
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$re = qr/.*(?:lay|ag?hi).*\%r15,-(([0-9]{2}|[3-9])[0-9]{2})
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(?:\(\%r15\))?$/ox;
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} elsif ($arch =~ /^sh64$/) {
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#XXX: we only check for the immediate case presently,
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# though we will want to check for the movi/sub
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# pair for larger users. -- PFM.
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#a00048e0: d4fc40f0 addi.l r15,-240,r15
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$re = qr/.*addi\.l.*r15,-(([0-9]{2}|[3-9])[0-9]{2}),r15/o;
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} elsif ($arch eq 'sparc' || $arch eq 'sparc64') {
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# f0019d10: 9d e3 bf 90 save %sp, -112, %sp
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$re = qr/.*save.*%sp, -(([0-9]{2}|[3-9])[0-9]{2}), %sp/o;
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} else {
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print("wrong or unknown architecture\n");
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print("wrong or unknown architecture \"$arch\"\n");
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exit
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}
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}
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sub bysize($) {
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my ($asize, $bsize);
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($asize = $a) =~ s/.*: *(.*)$/$1/;
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($bsize = $b) =~ s/.*: *(.*)$/$1/;
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$bsize <=> $asize
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}
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#
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# main()
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#
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my $funcre = qr/^$x* <(.*)>:$/;
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my $func;
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my $file, $lastslash;
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my ($func, $file, $lastslash);
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while (my $line = <STDIN>) {
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if ($line =~ m/$funcre/) {
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@ -137,6 +155,31 @@ while (my $line = <STDIN>) {
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next if ($size < 100);
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push @stack, "$intro$size\n";
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}
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elsif (defined $dre && $line =~ m/$dre/) {
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my $size = "Dynamic ($1)";
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next if $line !~ m/^($xs*)/;
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my $addr = $1;
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$addr =~ s/ /0/g;
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$addr = "0x$addr";
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#bbox: was: my $intro = "$addr $func [$file]:";
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my $intro = "$func [$file]:";
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my $padlen = 56 - length($intro);
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while ($padlen > 0) {
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$intro .= ' ';
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$padlen -= 8;
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}
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push @stack, "$intro$size\n";
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}
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}
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print sort bysize @stack;
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sub bysize($) {
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my ($asize, $bsize);
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($asize = $a) =~ s/.*: *(.*)$/$1/;
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($bsize = $b) =~ s/.*: *(.*)$/$1/;
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$bsize <=> $asize
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}
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# Sort output by size (last field)
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print sort { ($b =~ /:\t*(\d+)$/)[0] <=> ($a =~ /:\t*(\d+)$/)[0] } @stack;
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