add script which measures stack consumption.

Current top users: 0x08052f52 uncompress []: 393312 0x080c8a58 input_tab []: 82104 0x08092d5b ifaddrlist []: 32828 0x08056163 loadfont_main []: 32796 0x0806e508 colon []: 16532 0x08056095 do_loadfont []: 16400 0x0806da70 place_cursor []: 16388 0x080792e8 login_main []: 9176 393 kb of stack??? OMG...
author: Denis Vlasenko <vda.linux@googlemail.com> 2007-06-10 00:54:27 +0000
committer: Denis Vlasenko <vda.linux@googlemail.com> 2007-06-10 00:54:27 +0000
commit: d4fea900bdb92d7bba71348a40cb00b6748a8ecc (patch)
tree: 9f09ec44b1c7ee387e5bab1c499361ae7bc08573 /scripts/checkstack.pl
parent: 77e44d60e698c2164f610072e9f7e2bacefdd589 (diff)
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1 files changed, 137 insertions, 0 deletions
diff --git a/scripts/checkstack.pl b/scripts/checkstack.pl
new file mode 100755
index 000000000..41454ceb1
--- /dev/null
+++ b/scripts/checkstack.pl
@@ -0,0 +1,137 @@
+#!/usr/bin/perl
+# Stolen from Linux kernel :)
+#       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 | 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;
author	Denis Vlasenko <vda.linux@googlemail.com>	2007-06-10 00:54:27 +0000
committer	Denis Vlasenko <vda.linux@googlemail.com>	2007-06-10 00:54:27 +0000
commit	d4fea900bdb92d7bba71348a40cb00b6748a8ecc (patch)
tree	9f09ec44b1c7ee387e5bab1c499361ae7bc08573 /scripts/checkstack.pl
parent	77e44d60e698c2164f610072e9f7e2bacefdd589 (diff)
download	busybox-w32-d4fea900bdb92d7bba71348a40cb00b6748a8ecc.tar.gz busybox-w32-d4fea900bdb92d7bba71348a40cb00b6748a8ecc.tar.bz2 busybox-w32-d4fea900bdb92d7bba71348a40cb00b6748a8ecc.zip

diff --git a/scripts/checkstack.pl b/scripts/checkstack.pl new file mode 100755 index 000000000..41454ceb1 --- /dev/null +++ b/scripts/checkstack.pl
@@ -0,0 +1,137 @@
	1	#!/usr/bin/perl
	2
	3	# Stolen from Linux kernel :)
	4
	5	# Check the stack usage of functions
	6	#
	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
	17	#
	18	# Usage:
	19	# objdump -d vmlinux \| checkstack.pl [arch]
	20	#
	21	# TODO : Port to all architectures (one regex per arch)
	22
	23	# check for arch
	24	#
	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
	28	#
	29	# use anything else and feel the pain ;)
	30	my (@stack, $re, $x, $xs);
	31	{
	32	my $arch = shift;
	33	if ($arch eq "") {
	34	$arch = `uname -m`;
	35	}
	36
	37	$x = "[0-9a-f]"; # hex character
	38	$xs = "[0-9a-f ]"; # hex character or space
	39	if ($arch eq 'arm') {
	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') {
	65	#XXX
	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	$re = qr/.addi\.l.r15,-(([0-9]{2}\|[3-9])[0-9]{2}),r15/o;
	78	} else {
	79	print("wrong or unknown architecture\n");
	80	exit
	81	}
	82	}
	83
	84	sub bysize($) {
	85	my ($asize, $bsize);
	86	($asize = $a) =~ s/.: (.*)$/$1/;
	87	($bsize = $b) =~ s/.: (.*)$/$1/;
	88	$bsize <=> $asize
	89	}
	90
	91	#
	92	# main()
	93	#
	94	my $funcre = qr/^$x* <(.*)>:$/;
	95	my $func;
	96	my $file, $lastslash;
	97
	98	while (my $line = <STDIN>) {
	99	if ($line =~ m/$funcre/) {
	100	$func = $1;
	101	}
	102	elsif ($line =~ m/(.):\sfile format/) {
	103	$file = $1;
	104	$file =~ s/\.ko//;
	105	$lastslash = rindex($file, "/");
	106	if ($lastslash != -1) {
	107	$file = substr($file, $lastslash + 1);
	108	}
	109	}
	110	elsif ($line =~ m/$re/) {
	111	my $size = $1;
	112	$size = hex($size) if ($size =~ /^0x/);
	113
	114	if ($size > 0xf0000000) {
	115	$size = - $size;
	116	$size += 0x80000000;
	117	$size += 0x80000000;
	118	}
	119	next if ($size > 0x10000000);
	120
	121	next if $line !~ m/^($xs*)/;
	122	my $addr = $1;
	123	$addr =~ s/ /0/g;
	124	$addr = "0x$addr";
	125
	126	my $intro = "$addr $func [$file]:";
	127	my $padlen = 56 - length($intro);
	128	while ($padlen > 0) {
	129	$intro .= ' ';
	130	$padlen -= 8;
	131	}
	132	next if ($size < 100);
	133	push @stack, "$intro$size\n";
	134	}
	135	}
	136
	137	print sort bysize @stack;