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e756ad4556
This PR adresses the following issue : `ProcessLoader.ActiveApplication` could return invalid results when `_latestPid` pointed to a process that no longer existed in the kernel's process table. The original exception path was commented out and bypassed (by sh0inx?) with `GetValueOrDefault` to prevent UI lockups, but this only resolved the symptoms without fixing the root cause. This was due to sevral factors : - `_latestPid` was never reset or validated against the actual process state - ProcessLoader maintained its own `_processesByPid` dictionary separate from the kernel's `KernelContext.Processes` - No cleanups happened when processes exited or were terminated - ProcessLoader state could drift out of sync with the kernel process table **Solution/Fixes** - Validate` _latestPid` against the kernel process table before returning `ActiveApplication` - Check process state (Exited/Exiting) and automatically clear stale references - Add thread-safe cleanup methods (`ClearProcess`, `ClearAllProcesses`) - Integrate `ClearAllProcesses` into Switch.Dispose for proper shutdown cleanup - Add warning logs when stale PID is detected and cleared for debugging **Code Changes**: - `ProcessLoader.cs`: Add `_pidLock`, update `ActiveApplication` with validation, add cleanup methods - `Switch.cs`: Call `Processes.ClearAllProcesses()` in Dispose() Reviewed-on: https://git.ryujinx.app/projects/Ryubing/pulls/102