Introduced static refs, supported enums #61
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Signed-off-by: Старцев Матвей <tozarin@yandex.ru>
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UConcreteHeapRefwith negative addresses that could be equal toUSymbolicHeapRefbut notUConcreteHeapRef. Static refs are allocated for class refs, string constants, and enum values in the corresponding static initializer. It is possible to configureJcContextin a special way that all refs allocated in static initializers will receive negative addresses, but for now, as it was mentioned, it is used only for enums.