[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Libunwind-devel] [RFC][patch] Fix crash in _ULx86_64_tdep_trace whe

From: Paul Pluzhnikov
Subject: Re: [Libunwind-devel] [RFC][patch] Fix crash in _ULx86_64_tdep_trace when sigaltstack is too far away
Date: Fri, 11 Nov 2011 09:51:39 -0800

On Fri, Nov 11, 2011 at 9:46 AM, Lassi Tuura <address@hidden> wrote:
> Hi,
>>> I don't see any major disadvantages for fix 3.
> On second thought... The frame info recorded needs to be cacheable by %rip,
> and will be reused purely by %rip regardless of stack layout.
> If we are recording the real sigcontext_t address, will that still work?
> The original format hoped to be cacheable by recording only a delta from
> the current CFA so it's not dependent on actual stack location - not so
> good an idea with alt stacks as you noticed.

Ah, I see. But we could record delta here as well; just use 62 bits for it.

I'll update the patch shortly.

Paul Pluzhnikov

reply via email to

[Prev in Thread] Current Thread [Next in Thread]