linux-kernel - Re: [PATCH] gcov: fix memory allocation problem in gcov_info

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Message-ID: <5305C249.3080502@linux.vnet.ibm.com>
Date:	Thu, 20 Feb 2014 09:52:25 +0100
From:	Peter Oberparleiter <oberpar@...ux.vnet.ibm.com>
To:	Yuan Pengfei <coolypf@...com>
CC:	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] gcov: fix memory allocation problem in gcov_info_dup

On 19.02.2014 11:38, Yuan Pengfei wrote:
> Using -fprofile-values is one case that will cause the memory allocation
> problem. More changes are needed to fully support -fprofile-values. I
> submit this patch first because I think it is obvious and does no harm.
>> I'm unaware of any user of -fprofile-values in the kernel. Are you
>> trying to extend gcov-kernel to also support -fprofile-values? I would
>> expect that additional changes to the .gcda file creation logic are
>> required to fully support this GCC option.

If there is a way to trigger the problem of gcov_info.values == NULL
using the existing gcov-kernel infrastructure then I agree that this
should be fixed. If not, then I would rather see the suggested change as
part of a patch series that enables other profiling types.

-- 
Peter Oberparleiter
Linux on System z Development - IBM Germany

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