[8u] RFR: 8244225: stringop-overflow warning on strncpy call from compile_the_world_in

[Severin Gehwolf]

Hi,

Could I please get a review of this 8u backport? The JDK 11u patch
doesn't apply cleanly since string_ends_with() function isn't in 8u.
Therefore, the context is different enough for the patch to not apply
cleanly. This is in a NOT_PRODUCT() path of the VM and should be low
risk. I'm proposing this for review for JDK 8u parity.

Bug: https://bugs.openjdk.java.net/browse/JDK-8244225
webrev: https://cr.openjdk.java.net/~sgehwolf/webrevs/JDK-8244225/01/webrev/

Testing: Manual on a fastdebug build of the JVM. Compiling classLoader.o
         with -Wstringop-overflow. Warning present before the fix and it's
         gone after.

Thoughts? I'm not sure if this is worth the churn of doing the
backport, though.

Thanks,
Severin