[Offload] Fix segfault when looking for host device name (#141632)

Summary:
This is done using the generic device into pointe, but no such thing
exists for the host device, leading to a segfault. This patch fixes that
for now, but in the future we should probably be more careful in general
handling the possibility that the handle is null everywhere.

Fixes: https://github.com/llvm/llvm-project/issues/141434

1 files changed, 6 insertions, 0 deletions

diff --git a/offload/liboffload/src/OffloadImpl.cpp b/offload/liboffload/src/OffloadImpl.cpp
index c6f64d218cd2..f2a02d1cff94 100644
--- a/offload/liboffload/src/OffloadImpl.cpp
+++ b/offload/liboffload/src/OffloadImpl.cpp
@@ -230,6 +230,12 @@ Error olGetDeviceInfoImplDetail(ol_device_handle_t Device,
   // Find the info if it exists under any of the given names
   auto GetInfo = [&](std::vector<std::string> Names) {
     InfoQueueTy DevInfo;
+    if (Device == HostDevice())
+      return std::string("Host");
+
+    if (!Device->Device)
+      return std::string("");
+
     if (auto Err = Device->Device->obtainInfoImpl(DevInfo))
       return std::string("");