RFR(XXS): 8227338: templateInterpreter.cpp: copy_table() needs to be safer

[serguei.spitsyn at oracle.com]

Hi Dan,

This looks good to me as far as just discussed the atomic copy is 
considered to be a separate issue.

Thanks,
Serguei


On 7/6/19 06:53, Daniel D. Daugherty wrote:
> Greetings,
>
> During the code review for the following fix:
>
>     JDK-8227117 normal interpreter table is not restored after single 
> stepping with TLH
>     https://bugs.openjdk.java.net/browse/JDK-8227117
>
> Erik O. noticed a potential race with templateInterpreter.cpp: 
> copy_table()
> depending on C++ compiler optimizations. The following bug is being used
> to fix this issue:
>
>     JDK-8227338 templateInterpreter.cpp: copy_table() needs to be safer
>     https://bugs.openjdk.java.net/browse/JDK-8227338
>
> Here's the webrev URL:
>
>     http://cr.openjdk.java.net/~dcubed/8227338-webrev/0_for_jdk14/
>
> This fix has been tested via Mach5 Tier[1-3] on Oracle's usual platforms.
> Mach5 tier[4-6] is running now. It has also been tested with the manual
> jdb test from JDK-8227117 using 'release' and 'fastdebug' bits.
>
> Thanks, in advance, for questions, comments or suggestions.
>
> Dan