linux-kernel - Re: [PATCH] perf report: Fix sort__sym

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Message-ID: <5582090E.5060209@fb.com>
Date:	Wed, 17 Jun 2015 16:55:58 -0700
From:	Yannick Brosseau <scientist@...com>
To:	Jeff Epler <jepler@...ythonic.net>
CC:	<acme@...nel.org>, <mingo@...hat.com>, <paulus@...ba.org>,
	<a.p.zijlstra@...llo.nl>, <jolsa@...nel.org>, <ak@...ux.intel.com>,
	<linux-kernel@...r.kernel.org>, <kernel-team@...com>
Subject: Re: [PATCH] perf report: Fix sort__sym_cmp to also compare end of
 symbol

On 06/17/2015 04:53 PM, Jeff Epler wrote:
> On Wed, Jun 17, 2015 at 04:41:10PM -0700, Yannick Brosseau wrote:
>> When using a map file from a JIT, due to memory reuse, we can
>> obtain multiple symbols with the same start address but a different
>> length.
> Is there some reason it's impossible for the reused memory to have the
> same length / end address?
>
It's possible that they are the same, and in that case the function
returns 0.
The patch is adding the handling of the case where they are different.


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