RFR: 8318834: s390x: Debug builds are missing debug helpers

[Aleksey Shipilev]

On Wed, 25 Oct 2023 17:26:13 GMT, Andrew Haley <aph at openjdk.org> wrote:

> On s390x only, HotSpot is built by GCC with -ffunction-sections.
> This means that debug helpers such as ps() and pfl() are not available. These helpers are extremely useful in debugging, so it makes no sense to omit them from debug builds.

The comment in the block says:


    # do this on s390x also for libjvm (where serviceability agent is not supported)


...which I read as "if we enable this, SA would break". Does `serviceability/sa` pass in both release and fastdebug with this change?

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PR Review: https://git.openjdk.org/jdk/pull/16365#pullrequestreview-1698009433