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Re: [Qemu-devel] [Bug 932487] [NEW] win32: git rev 59f971d crashes when
From: |
Kevin Wolf |
Subject: |
Re: [Qemu-devel] [Bug 932487] [NEW] win32: git rev 59f971d crashes when accessing disk (coroutine issue) |
Date: |
Thu, 16 Feb 2012 12:15:30 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:10.0) Gecko/20120131 Thunderbird/10.0 |
Am 16.02.2012 12:01, schrieb Paolo Bonzini:
> On 02/16/2012 11:34 AM, Kevin Wolf wrote:
>> Remember that I saw a similar crash a while ago? It was definitely a
>> NULL pointer access somewhere inside SwitchToFiber. I can't remember
>> exactly what came out of it, but I think you and Paolo couldn't
>> reproduce it and I ran out of time for debugging win32 stuff.
>>
>> If I was to debug this, the first thing I would try is that I would dump
>> co->fiber (or actually I seem to remember it was some data structure
>> that is only pointed to by a field in co->fiber) immediately after the
>> coroutine is created (I think it was still okay then) and set a
>> watchpoint on it.
>
> IIRC the problem was that thread-local storage was not thread-local at all.
Ah, right. And we didn't introduce a workaround, so I guess this is the
same thing.
Do newer mingw versions get this right or were you just lucky and we
should look for some kind of workaround?
Kevin
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