linux-kernel - Re: perf archive warning

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Message-ID: <20110302085355.GA9857@hpt.nay.redhat.com>
Date:	Wed, 2 Mar 2011 16:53:55 +0800
From:	Han Pingtian <phan@...hat.com>
To:	Lin Ming <ming.m.lin@...el.com>
Cc:	linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>
Subject: Re: perf archive warning

On Wed, Mar 02, 2011 at 04:29:41PM +0800, Lin Ming wrote:
> > 
> > root@...el-s3e36-01 perf]# ./perf-archive
> > tar: .build-id/b2/370e39ea2898c6e11c188e2f3879e4e3d6d1ef: Cannot stat:
> > No such file or directory
> > tar: .build-id/b2/370e39ea2898c6e11c188e2f3879e4e3d6d1ef: Cannot stat:
> > No such file or directory
> > tar: Exiting with failure status due to previous errors
> 
> kernel.kallsyms is not created successfully in the buildid-cache.
> Could you have a try below patch?
> 
> diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
> index 72c124d..d3b5062 100644
> --- a/tools/perf/util/header.c
> +++ b/tools/perf/util/header.c
> @@ -271,11 +271,16 @@ int build_id_cache__add_s(const char *sbuild_id, const char *debugdir,
>  			  const char *name, bool is_kallsyms)
>  {
>  	const size_t size = PATH_MAX;
> -	char *realname = realpath(name, NULL),
> +	char *realname,
>  	     *filename = malloc(size),
>  	     *linkname = malloc(size), *targetname;
>  	int len, err = -1;
>  
> +	if (is_kallsyms)
> +		realname = (char *)name;
> +	else
> +		realname = realpath(name, NULL);
> +
>  	if (realname == NULL || filename == NULL || linkname == NULL)
>  		goto out_free;
>  
> @@ -307,7 +312,8 @@ int build_id_cache__add_s(const char *sbuild_id, const char *debugdir,
>  	if (symlink(targetname, linkname) == 0)
>  		err = 0;
>  out_free:
> -	free(realname);
> +	if (!is_kallsyms)
> +		free(realname);
>  	free(filename);
>  	free(linkname);
>  	return err;
> 
The patch didn't fix this problem. 
> 
> > Now please run:
> > 
> > $ tar xvf perf.data.tar.bz2 -C ~/.debug
> > 
> > wherever you need to run 'perf report' on.
> > [root@...el-s3e36-01 perf]# ./perf --version
> > perf version 2.6.38.rc6.166.g493f33
> > [root@...el-s3e36-01 perf]# ./perf buildid-list
> > b2370e39ea2898c6e11c188e2f3879e4e3d6d1ef [kernel.kallsyms]
> > dd95cb496ebc4ed922eeb5640965f1243fcfcd9a
> > /lib/modules/2.6.32-118.el6.x86_64/kernel/fs/ext4/ext4.ko
> > 9e1aca88b83308cec7574d74975fa6f7d654c96e /lib64/libc-2.12.so
> > d880be15bf992b5fbcc629e6bbf1c747a928ddd5 /lib64/libglib-2.0.so.0.2200.5
> > d1b2ca4e1ec8f81ba820e5f1375d960107ac7e50 /usr/lib64/libstdc++.so.6.0.13
> > [root@...el-s3e36-01 perf]#
> > 
> > --
> > Han Pingtian
> > Quality Engineer
> > hpt @ #kernel-qe
> > Red Hat, Inc
> > Freedom ... courage ... Commitment ... ACCOUNTABILITY
> > --
> > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> > the body of a message to majordomo@...r.kernel.org
> > More majordomo info at  http://vger.kernel.org/majordomo-info.html
> > Please read the FAQ at  http://www.tux.org/lkml/
> 

-- 
Han Pingtian
Quality Engineer
hpt @ #kernel-qe
Red Hat, Inc
Freedom ... courage ... Commitment ... ACCOUNTABILITY
--
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