add a missing property to the Task class

Obviews would fail to load on larger files when RocqStat was running it, the error messages it would throw were:

4-10-03 11:07:35,864 - DEBUG - controllers.PyObviewsCtrl - [OBVIEWS] INFO: server mode enabled.
2024-10-03 11:07:35,875 - DEBUG - controllers.PyObviewsCtrl - [OBVIEWS] Traceback (most recent call last):
2024-10-03 11:07:35,875 - DEBUG - controllers.PyObviewsCtrl - [OBVIEWS] File "/home/alex/work/rocqstat-ng/external/obviews/bin/obviews.py", line 1659, in <module>
2024-10-03 11:07:35,875 - DEBUG - controllers.PyObviewsCtrl - [OBVIEWS] main()
2024-10-03 11:07:35,875 - DEBUG - controllers.PyObviewsCtrl - [OBVIEWS] File "/home/alex/work/rocqstat-ng/external/obviews/bin/obviews.py", line 1646, in main
2024-10-03 11:07:35,875 - DEBUG - controllers.PyObviewsCtrl - [OBVIEWS] stat.ensure_load()
2024-10-03 11:07:35,875 - DEBUG - controllers.PyObviewsCtrl - [OBVIEWS] File "/home/alex/work/rocqstat-ng/external/obviews/bin/obviews.py", line 1166, in ensure_load
2024-10-03 11:07:35,875 - DEBUG - controllers.PyObviewsCtrl - [OBVIEWS] self.load()
2024-10-03 11:07:35,875 - DEBUG - controllers.PyObviewsCtrl - [OBVIEWS] File "/home/alex/work/rocqstat-ng/external/obviews/bin/obviews.py", line 1153, in load
2024-10-03 11:07:35,875 - DEBUG - controllers.PyObviewsCtrl - [OBVIEWS] self.task.collect(self,
2024-10-03 11:07:35,875 - DEBUG - controllers.PyObviewsCtrl - [OBVIEWS] File "/home/alex/work/rocqstat-ng/external/obviews/bin/obviews.py", line 991, in collect
2024-10-03 11:07:35,875 - DEBUG - controllers.PyObviewsCtrl - [OBVIEWS] g.collect(id, val, addr, size, ctx, self)
2024-10-03 11:07:35,875 - DEBUG - controllers.PyObviewsCtrl - [OBVIEWS] File "/home/alex/work/rocqstat-ng/external/obviews/bin/obviews.py", line 903, in collect
2024-10-03 11:07:35,875 - DEBUG - controllers.PyObviewsCtrl - [OBVIEWS] b.collect(id, val, addr, size, task)
2024-10-03 11:07:35,875 - DEBUG - controllers.PyObviewsCtrl - [OBVIEWS] File "/home/alex/work/rocqstat-ng/external/obviews/bin/obviews.py", line 820, in collect
2024-10-03 11:07:35,875 - DEBUG - controllers.PyObviewsCtrl - [OBVIEWS] if task.sview != None:
2024-10-03 11:07:35,876 - DEBUG - controllers.PyObviewsCtrl - [OBVIEWS] AttributeError: 'Task' object has no attribute 'sview'. Did you mean: 'views'

As far as I can tell, the sview attribute is expected in multiple places but not defined anywhere, so this PR defines it with a default value of None. I'm not sure what the sview attribute represents, or why it only becomes an issue when running Obviews on large binary/trace files through Rocqstat.

The command that causes this error is python -u /home/alex/work/rocqstat-ng/external/obviews/bin/obviews.py --serve --datadir /home/alex/work/rocqstat-ng/external/obviews/data/obviews /home/alex/work/rocqstat-ng/statemate/statemate_arm_cortex_M7.elf statemate_main, and if I run that manually through my terminal it works just fine, which furthers my confusion. I'm going to try to understand what the hell is going on but if someone has a better idea than I do, please let me know.

statinf-otawa / obviews

add a missing property to the Task class #35