RFR: 8140611: aarch64: jtreg test jdk/tools/pack200/UnpackerMemoryTest.java SEGVs

[Edward Nevill]

Hi,

Please review the following webrev

http://cr.openjdk.java.net/~enevill/8140611/webrev/

JIRA Issue: https://bugs.openjdk.java.net/browse/JDK-8140611

Summary: The UnpackerMemoryTest SEGVs in jni_GetStringUTFChars.

The problem is that c_rarg3 is a really bad choice for a tmp register since at this point the native arguments have been loaded into registers. (I confess guilt for this).

'lr' is a much better choice for the tmp register. We know this is free because we are just about to do a 'rt_call' which clobbers lr in any case.

Thanks for the review,
Ed.