[Patch, ARM, ping1] Fix PR target/56846

[Ramana Radhakrishnan]

On 27/11/14 09:34, Richard Biener wrote:
> On Thu, 27 Nov 2014, Thomas Preud'homme wrote:
>
>> Thanks. Ccing release manager for their opinion.
>
> It doesn't look ARM specific and frankly I have not too much expertise
> in this area.  The patch has been on trunk for more than two months
> though so I guess it is ok to backport.
>

It is ARM specific because the whole thing sits in a #ifdef 
__ARM_EABI_UNWINDER__ in eh_personality.cc.

regards
Ramana

> Richard.
>
>> Best regards,
>>
>> Thomas
>>
>>> -----Original Message-----
>>> From: Jonathan Wakely [mailto:jwakely@redhat.com]
>>> Sent: Wednesday, November 26, 2014 5:33 PM
>>> To: Thomas Preud'homme
>>> Cc: Tony Wang; gcc-patches@gcc.gnu.org; dan@debian.org; aph-
>>> gcc@littlepinkcloud.com; Richard Earnshaw; Ramana Radhakrishnan;
>>> libstdc++@gcc.gnu.org
>>> Subject: Re: [Patch, ARM, ping1] Fix PR target/56846
>>>
>>> On 26/11/14 17:23 -0000, Thomas Preud'homme wrote:
>>>> Ping?
>>>
>>> I'm OK with backporting it if a release manager approves it.
>>>
>>>
>>>>> -----Original Message-----
>>>>> From: gcc-patches-owner@gcc.gnu.org [mailto:gcc-patches-
>>>>> owner@gcc.gnu.org] On Behalf Of Thomas Preud'homme
>>>>> Sent: Wednesday, November 19, 2014 6:00 PM
>>>>> To: Tony Wang; gcc-patches@gcc.gnu.org; dan@debian.org; aph-
>>>>> gcc@littlepinkcloud.com; Richard Earnshaw; Ramana Radhakrishnan;
>>>>> libstdc++@gcc.gnu.org
>>>>> Subject: RE: [Patch ARM] Fix PR target/56846
>>>>>
>>>>>> From: gcc-patches-owner@gcc.gnu.org [mailto:gcc-patches-
>>>>>> owner@gcc.gnu.org] On Behalf Of Tony Wang
>>>>>>
>>>>>
>>>>>>
>>>>>> Hi all,
>>>>>>
>>>>>> The bug is reported at
>>>>>> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56846, and it’s about
>>> the
>>>>>> problem that
>>>>>> when exception handler is involved in the function, then
>>>>>> _Unwind_Backtrace function will run into deadloop on
>>>>>> arm target.
>>>>>
>>>>> The patch (in r215101) can be backported without any change on 4.8
>>> and
>>>>> 4.9 branches. I checked in QEMU with and without the patch on both
>>>>> branches and it indeed solves the problem.
>>>>>
>>>>> Testsuite run without regression when compiled with arm-none-eabi
>>>>> cross compiler and executed on QEMU emulating Cortex-M3.
>>>>>
>>>>> I also bootstrapped gcc on x86_64-linux-gnu and run the testsuite
>>>>> without
>>>>> regressions.
>>>>>
>>>>> Is it ok for backport?
>>>>>
>>>>> Best regards,
>>>>>
>>>>> Thomas
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>>
>>
>>
>>
>>
>>
>