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Re: [PATCH] Fix the atomic_compare_and_exchange_*_rel definitions.
- From: "Tulio Magno Quites Machado Filho" <tuliom at linux dot vnet dot ibm dot com>
- To: Lei Xu <lei dot xu at nxp dot com>, libc-alpha at sourceware dot org
- Cc: scott dot wood at nxp dot com, carlos at systemhalted dot org, sjmunroe at us dot ibm dot com
- Date: Mon, 13 Jun 2016 11:19:00 -0300
- Subject: Re: [PATCH] Fix the atomic_compare_and_exchange_*_rel definitions.
- Authentication-results: sourceware.org; auth=none
- References: <1465723849-12811-1-git-send-email-lei dot xu at nxp dot com>
Hi Lei,
Lei Xu <lei.xu@nxp.com> writes:
> In current code, atomic_compare_and_exchange_*_rel is defined as
> atomic_compare_and_exchange_*_acq, however this is wrong on power arch,
> especially __arch_*_rel has been defined on power arch.
> This has caused segmentation fault issue
> when doing pthread_mutex_lock/unlock operations on PowerPC E6500.
I didn't expect the generic code to affect a PowerPC E6500 build.
It should be using both of the files:
sysdeps/powerpc/atomic-machine.h
sysdeps/powerpc/powerpc32/atomic-machine.h
These files define atomic_compare_and_exchange_val_rel(), which should
prevent from defining the atomic_compare_and_exchange_val_rel() as
atomic_compare_and_exchange_val_acq() in the generic file.
So, there is a chance your build didn't use these files...
How are you configuring your glibc build?
--
Tulio Magno