llvm

e1e4bc8d - [SYCL][Windows] Don't do backend calls in DLL_PROCESS_DETACH (#22277)

[SYCL][Windows] Don't do backend calls in DLL_PROCESS_DETACH (#22277) In Windows, ExitProcess kills spawned threads before calling DLL_PROCESS_DETACH. This can lead to issues if the backend relies on threads. https://learn.microsoft.com/en-us/windows/win32/api/processthreadsapi/nf-processthreadsapi-exitprocess This MS devblog recommends that DLL_PROCESS_DETACH should be as minimal as possible. https://devblogs.microsoft.com/oldnewthing/20120105-00/?p=8683 Additionally, if helper threads are forcibly terminated this can prevent the stdout buffer from being flushed, so add explicit flushing of the stdout buffer after the threads are killed. Only cleanup early if L0 is not being used, otherwise `UR_L0_LEAKS_DEBUG` will break. Also extends the functionality to other libraries that may contain SYCL objects through the `Managed` class.