linux-kernel - Re: [PATCH 52/52] perf tools: Add support for 32-bit compatibility VDSOs

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Message-ID: <20140723130525.GA17252@krava.brq.redhat.com>
Date:	Wed, 23 Jul 2014 15:05:25 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	Adrian Hunter <adrian.hunter@...el.com>
Cc:	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	linux-kernel@...r.kernel.org, David Ahern <dsahern@...il.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Namhyung Kim <namhyung@...il.com>,
	Paul Mackerras <paulus@...ba.org>,
	Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH 52/52] perf tools: Add support for 32-bit compatibility
 VDSOs

On Tue, Jul 22, 2014 at 04:18:01PM +0300, Adrian Hunter wrote:
> 'perf record' post-processes the event stream  to create
> a list of build-ids for object files for which sample
> events have been recorded.  That results in those object
> files being recorded in the build-id cache.
> 
> In the case of VDSO, perf tools reads it from memory
> and copies it into a temporary file, which as decribed
> above, gets added to the build-id cache.
> 
> Then when the perf.data file is processed by other
> tools, the build-id of VDSO is listed in the perf.data
> file and the VDSO can be read from the build-id cache.
> In that case the name of the map, the short name of the
> DSO, and the entry in the build-id cache are all
> "[vdso]".
> 

heya,
I reviewed vdso changes:

perf tools: Pass machine to vdso__dso_findnew()
perf tools: Group VDSO global variables into a structure
perf tools: Fix the lifetime of the VDSO temporary file
perf tools: Add vdso__new()
perf tools: Separate the VDSO map name from the VDSO dso name
perf tools: Build programs to copy 32-bit compatibility VDSOs
perf tools: Add dso__type()
perf tools: Add thread parameter to vdso__dso_findnew()
perf tools: Add support for 32-bit compatibility VDSOs

apart from small comments for above patches:

Acked-by: Jiri Olsa <jolsa@...hat.com>

Arnaldo,
I can handle those if needed, please let me know

thanks,
jirka
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