Yes, I can tell that the pointer is unaligned, I was wondering why I would get a NullReferenceException for an unaligned access. I would assume that mono sets up some handler or something that catches unaligned exceptions? Maybe not?
On Thu, Mar 26, 2015 at 2:23 PM Brandon Perry <bperry.volat...@gmail.com> wrote: > 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 <var...@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....@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 <var...@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....@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@lists.ximian.com >>>>> http://lists.ximian.com/mailman/listinfo/mono-devel-list >>>>> >>>>> >>>> >> >> _______________________________________________ >> Mono-devel-list mailing list >> Mono-devel-list@lists.ximian.com >> http://lists.ximian.com/mailman/listinfo/mono-devel-list >> >> > > > -- > http://volatile-minds.blogspot.com -- blog > http://www.volatileminds.net -- website >
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