linux-kernel - [PATCH 1/4] scripts/checkstack.pl: don't display $dre as different entity

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Date:   Thu, 30 Apr 2020 18:19:29 +0530
From:   Maninder Singh <maninder1.s@...sung.com>
To:     yamada.masahiro@...ionext.com, george_davis@...tor.com
Cc:     linux-kernel@...r.kernel.org, a.sahrawat@...sung.com,
        Maninder Singh <maninder1.s@...sung.com>,
        Vaneet Narang <v.narang@...sung.com>
Subject: [PATCH 1/4] scripts/checkstack.pl: don't display $dre as different
 entity

currnetly script prints stack usage for functions
in two ways:($re and $dre)

dre breaks sorting mechanism.
0xffffa00011f26f88 sunxi_mux_clk_setup.isra.0 [vmlinux]:Dynamic (0x140)
..
0xffffa00011f27210 sunxi_divs_clk_setup [vmlinux]:      Dynamic (0x1d0)

so we can print it in decimal only.

Also address before function name is changed to function
start address rather than stack consumption address.
Because in next patch, arm has two ways to use stack
which can be clubbed and printed in one function only.

All symbols whose stack by adding(re and dre) is greater than
100, will be printed.

0xffffa00011f2720c0 sunxi_divs_clk_setup [vmlinux]:     464
...
0xffffa00011f26f840 sunxi_mux_clk_setup.isra.0 [vmlinux]:320

Signed-off-by: Vaneet Narang <v.narang@...sung.com>
Signed-off-by: Maninder Singh <maninder1.s@...sung.com>
---
 scripts/checkstack.pl | 52 +++++++++++++++++++++++++--------------------------
 1 file changed, 25 insertions(+), 27 deletions(-)

diff --git a/scripts/checkstack.pl b/scripts/checkstack.pl
index 371bd17..412c459 100755
--- a/scripts/checkstack.pl
+++ b/scripts/checkstack.pl
@@ -109,11 +109,28 @@ my (@stack, $re, $dre, $x, $xs, $funcre);
 #
 # main()
 #
-my ($func, $file, $lastslash);
+my ($func, $file, $lastslash, $total_size, $addr, $intro);
 
 while (my $line = <STDIN>) {
 	if ($line =~ m/$funcre/) {
+		if ($total_size > 100) {
+			push @stack, "$intro$total_size\n";
+		}
+
 		$func = $1;
+		next if $line !~ m/^($xs*)/;
+		$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;
@@ -134,37 +151,18 @@ while (my $line = <STDIN>) {
 		}
 		next if ($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";
+		$total_size = $total_size + $size
 	}
 	elsif (defined $dre && $line =~ m/$dre/) {
-		my $size = "Dynamic ($1)";
-
-		next if $line !~ m/^($xs*)/;
-		my $addr = $1;
-		$addr =~ s/ /0/g;
-		$addr = "0x$addr";
+		my $size = $1;
 
-		my $intro = "$addr $func [$file]:";
-		my $padlen = 56 - length($intro);
-		while ($padlen > 0) {
-			$intro .= '	';
-			$padlen -= 8;
-		}
-		push @stack, "$intro$size\n";
+		$size = hex($size) if ($size =~ /^0x/);
+		$total_size = $total_size + $size
 	}
 }
+if ($total_size > 100) {
+	push @stack, "$intro$total_size\n";
+}
 
 # Sort output by size (last field)
 print sort { ($b =~ /:\t*(\d+)$/)[0] <=> ($a =~ /:\t*(\d+)$/)[0] } @stack;
-- 
1.9.1