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

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



Best regards,


-----Original Message-----
From: Jonathan Wakely []
Sent: Wednesday, November 26, 2014 5:33 PM
To: Thomas Preud'homme
Cc: Tony Wang;;; aph-; Richard Earnshaw; Ramana Radhakrishnan;
Subject: Re: [Patch, ARM, ping1] Fix PR target/56846

On 26/11/14 17:23 -0000, Thomas Preud'homme wrote:

I'm OK with backporting it if a release manager approves it.

-----Original Message-----
From: [mailto:gcc-patches-] On Behalf Of Thomas Preud'homme
Sent: Wednesday, November 19, 2014 6:00 PM
To: Tony Wang;;; aph-; Richard Earnshaw; Ramana Radhakrishnan;
Subject: RE: [Patch ARM] Fix PR target/56846

From: [mailto:gcc-patches-] On Behalf Of Tony Wang

Hi all,

The bug is reported at, and itâs about
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
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

Is it ok for backport?

Best regards,


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