[11u] RFR 8223186: HotSpot compile warnings from GCC 9

[Severin Gehwolf]

Hi Martin,

On Mon, 2021-01-18 at 18:34 -0300, Martin Balao wrote:
> Hi,
> 
> I'd like to propose an 11u backport of JDK-8223186 [1]:
> 
> Webrev.00:
> 
>  * http://cr.openjdk.java.net/~mbalao/webrevs/8223186/8223186.webrev.11u.00/
> 
> jdk/jdk patch does not apply cleanly because of the following
> conflicts:
> 
>  * src/hotspot/share/compiler/disassembler.cpp
>   * 11u has JDK-8222079 [2] applied, which includes the changes
> introduced by JDK-8223186 and a change that supersedes JDK-8223186 in
> the _nm field. No change to apply in the 11u backport.
> 
>  * src/hotspot/share/gc/shared/ptrQueue.cpp
>   * 11u does not have JDK-8154343 [3] applied, so the file is located
> in
> src/hotspot/share/gc/g1/ptrQueue.cpp.
>   * The 'strncpy' function fixed by JDK-8223186 is introduced by
> JDK-8212826 [4] but the latter is not available in 11u. JDK-8212826
> is
> not fundamental or related to JDK-8223186, so I believe we should not
> backport it at this time as its dependency. No change to apply in the
> 11u backport.
> 
> Testing: no regressions found while building with GCC 9.2.1 in my local
> enviornment.

Looks good to me.

Thanks,
Severin

> Thanks,
> Martin.-
> 
> --
> [1] - https://bugs.openjdk.java.net/browse/JDK-8223186
> [2] - https://bugs.openjdk.java.net/browse/JDK-8222079
> [3] - https://bugs.openjdk.java.net/browse/JDK-8154343
> [4] - https://bugs.openjdk.java.net/browse/JDK-8212826
>