[Openmp-dev] Target CUDA RTL --> CUDA error is: an illegal memory access was encountered

[Itaru Kitayama via Openmp-dev]

If I change class Derived's private data to an array of 100 integers, it
executes, but
the first element of the array is reported as 0, instead of 1234. Shouldn't
bitwise copy
work when mapping the pointer to AbsBase class like an array of one?

On Wed, Jan 15, 2020 at 2:32 PM Alexey Bataev <a.bataev at hotmail.com> wrote:

> And it should fail since you're mapping non trivially copyable type.
>
> Best regards,
> Alexey Bataev
>
> 14 янв. 2020 г., в 19:14, Itaru Kitayama <itaru.kitayama at gmail.com>
> написал(а):
>
> 
> This piece of C++ program execution fails at run time.
>
> #include <stdio.h>
>
> class AbsBase {
> public:
>         virtual int f() = 0;
> };
>
> class Derived : public AbsBase {
> private:
>         int *arr = new int[100];
> public:
>         int f() { return arr[0]; }
>         void fillarray() {
>                 arr[0] = 1234;
>         }
> };
>
> int main() {
>         AbsBase *absBase = new Derived();
>         static_cast<Derived*>(absBase)->fillarray();
> #pragma omp target parallel for map(to: absBase[0:1])
>         for (int i=0;i<10;i++) {
>                 Derived d1(*static_cast<Derived*>(absBase));
>                 printf("arr[0] is %d\n", d1.f());
>         }
> }
>
> On Sun, Jan 12, 2020 at 1:45 PM Doerfert, Johannes <jdoerfert at anl.gov>
> wrote:
>
>> On 01/12, Itaru Kitayama wrote:
>> > Do you guys have a timeframe for that feature
>> > Implemented?
>>
>> I do not and I don't know anyone who will drive this right now.
>>
>> As mentioned before, you should be able to "move/copy-create" the
>> elements on the device in order to use virtual functions.
>>
>>
>> > On Sun, Jan 12, 2020 at 12:51 Doerfert, Johannes <jdoerfert at anl.gov>
>> wrote:
>> >
>> > > On 01/11, Alexey Bataev via Openmp-dev wrote:
>> > > > Virtual functions are not supported.
>> > >
>> > > Not yet ;).
>> > >
>> > > We'll get it with 5.1 so we might actually implement it soon. Till
>> then,
>> > > you have to create the object on the device you call the virtual
>> > > function.
>> > >
>>
>> --
>>
>> Johannes Doerfert
>> Researcher
>>
>> Argonne National Laboratory
>> Lemont, IL 60439, USA
>>
>> jdoerfert at anl.gov
>>
>
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