fix: ensure Python backend shm cleanup on forced shutdown#450
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Register parent-owned shm regions for atexit cleanup, remove regions explicitly in TerminateStub, and honor stub-timeout-seconds during stub teardown to avoid orphaned regions when server exit times out.
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What does the PR do?
Fix orphaned
triton_python_backend_shm_region_*files when Python backend stub shutdown exceeds the server exit timeout (seen on IGX-Orin lifecycle CI).Root cause
stub-timeout-secondswas parsed but not used duringTerminateStub.Fix
stub_timeout_secondsthrough stub teardown with bounded wait/kill.RemoveShmRegion()explicitly inTerminateStub.Related PRs
Test plan
L0_backend_python--IGX-Orin, lifecycle PASSED).Checklist
<type>: <description>