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[SYCL][Unit] Fix crash when user sets ONEAPI_DEVICE_SELECTOR in shell #22684

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Merged
againull merged 1 commit into from
Jul 21, 2026
Merged

[SYCL][Unit] Fix crash when user sets ONEAPI_DEVICE_SELECTOR in shell #22684

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14 changes: 14 additions & 0 deletions sycl/unittests/helpers/UrMock.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -562,6 +562,20 @@ template <sycl::backend Backend = backend::opencl> class UrMock {
/// This ensures UR is setup for adapter mocking and also injects our default
/// entry-point overrides into the mock adapter.
UrMock() {
// Device selector env vars are read into a process-wide cache on first
// use (see SYCLConfig<ONEAPI_DEVICE_SELECTOR>::get()). If left set in the
// ambient environment, they filter out the mock adapter's device (which
// reports itself as `Backend`, opencl by default) and every mock-based
// test aborts with "No device of requested type available". Clear them
// before any SYCL runtime code can read them.
#ifdef _WIN32
_putenv_s("ONEAPI_DEVICE_SELECTOR", "");
_putenv_s("SYCL_DEVICE_FILTER", "");
#else
unsetenv("ONEAPI_DEVICE_SELECTOR");
unsetenv("SYCL_DEVICE_FILTER");
#endif

if constexpr (Backend == backend::opencl) {
// Some tests use the interop handles, so we need to ensure the mock
// OpenCL library is loaded.
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