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A previous commit introduced a bug to `interpreter_clear()`: it set `interp->ceval.instrumentation_version` to 0, without making the corresponding change to `tstate->eval_breaker` (which holds a thread-local copy of the version). After this happens, Python code can still run due to object finalizers during a GC, and the version check in bytecodes.c will see a different result than the one in instrumentation.c causing an infinite loop. The fix itself is straightforward: clear `tstate->eval_breaker` when clearing `interp->ceval.instrumentation_version`.
30 lines
727 B
Python
30 lines
727 B
Python
#!/usr/bin/env python3
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# gh-115832: An object destructor running during the final GC of interpreter
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# shutdown triggered an infinite loop in the instrumentation code.
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import sys
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class CallableCycle:
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def __init__(self):
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self._cycle = self
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def __del__(self):
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pass
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def __call__(self, code, instruction_offset):
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pass
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def tracefunc(frame, event, arg):
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pass
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def main():
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tool_id = sys.monitoring.PROFILER_ID
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event_id = sys.monitoring.events.PY_START
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sys.monitoring.use_tool_id(tool_id, "test profiler")
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sys.monitoring.set_events(tool_id, event_id)
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sys.monitoring.register_callback(tool_id, event_id, CallableCycle())
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if __name__ == "__main__":
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sys.exit(main())
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