linux-kernel - Re: [PATCH 1/2] tracing/recordmount.pl: optimize offsets-handling

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Date:	Tue, 05 Jan 2010 13:39:11 -0500
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Wolfram Sang <w.sang@...gutronix.de>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] tracing/recordmount.pl: optimize offsets-handling

On Tue, 2010-01-05 at 19:27 +0100, Wolfram Sang wrote:
> - move check for open file in front of the writing loop
> - use perl-constructs to access the array
> 
> Signed-off-by: Wolfram Sang <w.sang@...gutronix.de>
> ---
>  scripts/recordmcount.pl |   18 +++++++++---------
>  1 files changed, 9 insertions(+), 9 deletions(-)
> 
> diff --git a/scripts/recordmcount.pl b/scripts/recordmcount.pl
> index 92f09fe..5de12c7 100755
> --- a/scripts/recordmcount.pl
> +++ b/scripts/recordmcount.pl
> @@ -432,14 +432,14 @@ sub update_funcs
>  
>      # Loop through all the mcount caller offsets and print a reference
>      # to the caller based from the ref_func.
> -    for (my $i=0; $i <= $#offsets; $i++) {
> -	if (!$opened) {
> -	    open(FILE, ">$mcount_s") || die "can't create $mcount_s\n";
> -	    $opened = 1;
> -	    print FILE "\t.section $mcount_section,\"a\",$section_type\n";
> -	    print FILE "\t.align $alignment\n" if (defined($alignment));
> -	}
> -	printf FILE "\t%s %s + %d\n", $type, $ref_func, $offsets[$i] - $offset;
> +    if (!$opened) {
> +	open(FILE, ">$mcount_s") || die "can't create $mcount_s\n";
> +	$opened = 1;
> +	print FILE "\t.section $mcount_section,\"a\",$section_type\n";
> +	print FILE "\t.align $alignment\n" if (defined($alignment));
> +    }
> +    foreach my $cur_offset (@offsets) {
> +	printf FILE "\t%s %s + %d\n", $type, $ref_func, $cur_offset - $offset;
>      }
>  }
>  
> @@ -514,7 +514,7 @@ while (<IN>) {
>      }
>      # is this a call site to mcount? If so, record it to print later
>      if ($text_found && /$mcount_regex/) {
> -	$offsets[$#offsets + 1] = hex $1;
> +	push(@offsets, hex $1);
>      }
>  }
>  

OK, I like this patch. I'll pull it in.

Thanks!

-- Steve



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