Guard GCIdMark against nested calls

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    • Type: Enhancement
    • Resolution: Fixed
    • Priority: P4
    • 18
    • Affects Version/s: 18
    • Component/s: hotspot
    • gc
    • b14

      `GCIdMark::_previous_gc_id` is used to support nested GC ids. However, GC ids are never nested.

      Drop that field and add assertions against nested calls.

            Assignee:
            Albert Yang
            Reporter:
            Albert Yang
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