[Openmp-commits] [PATCH] D142399: [Libomptarget] Use the nextgen plugins by default.

Kevin Sala Penad├ęs via Phabricator via Openmp-commits openmp-commits at lists.llvm.org
Mon Jan 23 13:47:13 PST 2023

kevinsala added a comment.

In D142399#4074765 <https://reviews.llvm.org/D142399#4074765>, @jhuber6 wrote:

> @carlo.bertolli @kevinsala The only tests the nextgen plugins fail for me are the following. Any update on getting this resolved? I think we should aim to land this before the fork and then work on deleting the old plugins after.
>   Failed Tests (2):
>     libomptarget :: amdgcn-amd-amdhsa :: mapping/prelock.cpp
>     libomptarget :: amdgcn-amd-amdhsa-LTO :: mapping/prelock.cpp

The patch D141227 <https://reviews.llvm.org/D141227> implements the lock/unlock API. Yesterday I updated the patch with new features. We can merge it if you all find it OK.

Regarding the tests, even with the previous patch applied, they fail in the code line below. Is that line actually valid? We are trying to map an address (`locked`) that cannot be accessed by the host. That pointer is the `agent_ptr` returned by `hsa_amd_memory_lock`. If the plugin tries to access that buffer it will segfault. That's what is probably happening in the nextgen plugin because it tries to call `std::memcpy` on that "host pointer" in `__tgt_rtl_data_submit`.


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