[Mono-dev] NRE when using pointers on armhf

[Brandon Perry]

Could also cast to an IntPtr and check the Size property, which would
return the number of bytes in the pointer?

https://msdn.microsoft.com/en-us/library/system.intptr.size%28v=vs.110%29.aspx

Might be misunderstanding the issue though.

On Thu, Mar 26, 2015 at 4:20 PM, Zoltan Varga <vargaz at gmail.com> wrote:

> Hi,
>
>   You can check whenever the pointer is aligned by converting it into an
> int.
>
>              Zoltan
>
> On Thu, Mar 26, 2015 at 4:53 PM, Slide <slide.o.mix at gmail.com> wrote:
>
>> That's a good point! Can you tell me where in the mono code that the
>> unaligned accesses are handled? I'd just like to confirm.
>>
>> Thanks!
>>
>> slide
>>
>> On Thu, Mar 26, 2015 at 1:13 PM Zoltan Varga <vargaz at gmail.com> wrote:
>>
>>> Hi,
>>>
>>>  arm might require aligned reads, i.e. 'p' should be 4 byte aligned in
>>> this case.
>>>
>>>           Zoltan
>>>
>>> On Thu, Mar 26, 2015 at 3:28 PM, Slide <slide.o.mix at gmail.com> wrote:
>>>
>>>> I am trying to compile and use the ZeroC Ice remoting library for armhf
>>>> to run on my RaPi 2. The compilation goes fine, but when running the test
>>>> suite I am getting a NullReferenceException on the pointer assignment in
>>>> the following code:
>>>>
>>>> fixed(byte* p = &_bytes[_position])
>>>> {
>>>>     *((float*)p) = _valBytes.floatVal; // exception here
>>>> }
>>>>
>>>> This same code works on x86_64, so I am assuming there is something
>>>> that is missing in the armhf implementation.
>>>>
>>>> Is there something I can do to debug what might be missing and provide
>>>> a patch? I've never done work on the mono runtime itself.
>>>>
>>>> Thanks,
>>>>
>>>> slide
>>>>
>>>>
>>>> _______________________________________________
>>>> Mono-devel-list mailing list
>>>> Mono-devel-list at lists.ximian.com
>>>> http://lists.ximian.com/mailman/listinfo/mono-devel-list
>>>>
>>>>
>>>
>
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