[RFR] fix crash "guarantee(sect->end() <= tend) failed: sanity"

[Edward Nevill]

Looks good,

Thanks,
Ed.

On Fri, 2019-06-14 at 17:19 +0000, Sergey Nazarkin wrote:
> Hi,
> 
> please review the fix for the crash caused by arch-specific patch for "8176100: [aarch32] [REDO][REDO] G1 Needs pre barrier on dereference of weak JNI handles”. 
> 
> New instruction was added to src/cpu/aarch32/vm/jniFastGetField_aarch32.cpp without code buffer expansion http://hg.openjdk.java.net/aarch32-port/jdk8u/hotspot/rev/2a07e209249a#l1.8
>