From: Adrian Hunter <adrian.hunter@intel.com>
To: Vladimir Nikulichev <nvs@tbricks.com>, Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Paul Mackerras <paulus@samba.org>, Ingo Molnar <mingo@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
"linux-perf-users@vger.kernel.org"
<linux-perf-users@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] perf tools: Adjust symbols in VDSO
Date: Thu, 17 Apr 2014 11:46:42 +0300 [thread overview]
Message-ID: <534F94F2.7020402@intel.com> (raw)
In-Reply-To: <web-7508803@mx2.tbricks.com>
On 04/11/2014 05:25 PM, Vladimir Nikulichev wrote:
> perf tools: Adjust symbols in VDSO
>
> pert-report doesn't resolve function names in VDSO:
>
> $ perf report --stdio -g flat,0.0,15,callee --sort pid
> ...
> 8.76%
> 0x7fff6b1fe861
> __gettimeofday
> ACE_OS::gettimeofday()
> ...
>
> In this case symbol values should be adjusted the same way as for executables,
> relocatable objects and prelinked libraries.
>
> After fix:
>
> $ perf report --stdio -g flat,0.0,15,callee --sort pid
> ...
> 8.76%
> __vdso_gettimeofday
> __gettimeofday
> ACE_OS::gettimeofday()
>
> Signed-off-by: Vladimir Nikulichev <nvs@tbricks.com>
Annotation still doesn't work. but this is a start, so:
Reviewed-by: Adrian Hunter <adrian.hunter@intel.com>
>
> diff --git a/tools/perf/util/symbol-elf.c b/tools/perf/util/symbol-elf.c
> index 3b7dbf5..6864661 100644
> --- a/tools/perf/util/symbol-elf.c
> +++ b/tools/perf/util/symbol-elf.c
> @@ -6,6 +6,7 @@
> #include <inttypes.h>
>
> #include "symbol.h"
> +#include "vdso.h"
> #include <symbol/kallsyms.h>
> #include "debug.h"
>
> @@ -618,6 +619,7 @@ int symsrc__init(struct symsrc *ss, struct dso *dso,
> const char *name,
> GElf_Shdr shdr;
> ss->adjust_symbols = (ehdr.e_type == ET_EXEC ||
> ehdr.e_type == ET_REL ||
> + is_vdso_map(dso->short_name) ||
> elf_section_by_name(elf, &ehdr, &shdr,
> ".gnu.prelink_undo",
> NULL) != NULL);
next prev parent reply other threads:[~2014-04-17 8:47 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-11 14:25 [PATCH] perf tools: Adjust symbols in VDSO Vladimir Nikulichev
2014-04-17 8:46 ` Adrian Hunter [this message]
-- strict thread matches above, loose matches on Subject: below --
2014-04-11 13:19 Vladimir Nikulichev
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