[Openmp-dev] Non overlapping memory segments

[Rokos, Georgios via Openmp-dev]

Hi Ye,

Yes, it’s safe to assume so. If the user code tries to map a new memory region which extends into an already mapped memory region, then libomptarget will error out and won’t perform the new mapping. The only case where such an extension into already mapped data is allowed is when the mapping is implicit, but in that case no new mapping is created actually, i.e. the library reuses the existing entry in HostDataToTargetMap to perform address translation.

George

From: Openmp-dev <openmp-dev-bounces at lists.llvm.org> On Behalf Of Ye Luo via Openmp-dev
Sent: Thursday, 18 June, 2020 06:18
To: via Openmp-dev <openmp-dev at lists.llvm.org>
Subject: [Openmp-dev] Non overlapping memory segments

Hi all,
Can I safely assume no overlapping memory segments stored in HostDataToTargetMap in libomptarget?
Best,
Ye
===================
Ye Luo, Ph.D.
Computational Science Division & Leadership Computing Facility
Argonne National Laboratory
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