RFR (XS): 8015635: Crash when specifying very large code cache size

[Albert Noll]

Hi,

thanks for reviewing this small patch.

Best,
Albert

jbs: https://jbs.oracle.com/bugs/browse/JDK-8015635
webrev: http://cr.openjdk.java.net/~anoll/8015635/webrev/ 
<http://cr.openjdk.java.net/%7Eanoll/8015635/webrev/>

Problem: A code cache size larger than 2G is not supported and therefore 
results in VM crashes.
Solution: Limit the size of the code cache to at most 2G when arguments 
are checked. If a larger code cache size is specified with 
-XX:ReservedCodeCacheSize=..., the JVM does not start and reports an error.


Best,
Albert

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