Fix race condition in inline static mocking - #213
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InlineStaticMockMaker, StaticMockMethodAdvice, and StaticMockitoSession previously tracked active static mocks using standard HashMap instances. When background threads executed methods on instrumented classes (such as Thread.onSpinWait()) while test threads were concurrently creating or resetting static mocks, iterating over classToMarker.keySet() threw ConcurrentModificationException. Switch internal mock tracking maps to ConcurrentHashMap and sessions list to CopyOnWriteArrayList, and add null safety guards to map lookups to eliminate this race condition.
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InlineStaticMockMaker, StaticMockMethodAdvice, and StaticMockitoSession previously tracked active static mocks using standard HashMap instances. When background threads executed methods on instrumented classes (such as Thread.onSpinWait()) while test threads were concurrently creating or resetting static mocks, iterating over classToMarker.keySet() threw
ConcurrentModificationException.
Switch internal mock tracking maps to ConcurrentHashMap and sessions list to CopyOnWriteArrayList, and add null safety guards to map lookups to eliminate this race condition.