[jdk8u-dev] RFR: 8360869: jcstress is able to crash jdk8 on aarch64 with jfr on

[Andrew John Hughes]

On Mon, 15 Sep 2025 16:00:26 GMT, Jiří Vaněk <jvanek at openjdk.org> wrote:

> We are seeing rare crashes in jcstress with jdk8 on aarch64 with jfron. Those crashes are real, however we were not able to reproduce with builds on gcc 5 and up. The real culprint was not found. but gcc version on aarch64 should be checked.  Ideal version seems 7, but I'm not that bold.
> 
> I think this change must be accompanied by regenerating  `generated-configure` but am not sure with process on it.

I would move the `AC_MSG_RESULT` earlier i.e.
~~~
      AC_MSG_RESULT([found ($COMPILER_VERSION_NUMBER])
      if test $COMPILER_VERSION_NUMBER_MAJOR -lt 5; then
        AC_MSG_ERROR([GCC < 5 is known to lead to incorrect compilation on aarch64. See JDK-8360869.])
      fi
~~~

And yes, configure needs to be regenerated at present.

I've removed the approval request. This should only be done after successful review and with a comment as to why it is suitable for inclusion. Easier way is with the `/approval request` command.

-------------

Changes requested by andrew (Reviewer).

PR Review: https://git.openjdk.org/jdk8u-dev/pull/697#pullrequestreview-3232159871