Invalid code generated by C2 compiler in OpenJDK 21

[Antoine DESSAIGNE]

Thank you Volker and Andrew for your replies,

Unfortunately, there's no hs_error generated, the code throws a
NullPointerException when it shouldn't.

I can even reproduce it with JDK 23, I took the master of the jdk
repository this morning (commit b31454e3623 to be precise) and it
still fails.

I cannot exclude this method from the JIT as it's used a lot in our application.

I checked many many times the commit to be sure that I have the right
one and I do. It fails almost every time with 10737e168c9 [1] but it
never fails with its parent commit, even after 20 tests.

[1] https://github.com/openjdk/jdk/commit/10737e168c967a08e257927251861bf2c14795ab

Le ven. 15 déc. 2023 à 12:37, Andrew Haley
<aph-open at littlepinkcloud.com> a écrit :
>
> On 12/15/23 10:20, Antoine DESSAIGNE wrote:
> > Do you have an idea of why this is happening? Do you know what test I
> > can run?
>
> First, try to reproduce it with JDK 22 preview.
>
> If you can't provide a reproducer, it's likely that no one will be
> able to fix it now, and you'll have to wait until it gets fixed.
>
> Try: '-XX:CompileCommand=exclude,foo.bar.baz.Classname::badMethodName'
>
> --
> Andrew Haley  (he/him)
> Java Platform Lead Engineer
> Red Hat UK Ltd. <https://www.redhat.com>
> https://keybase.io/andrewhaley
> EAC8 43EB D3EF DB98 CC77 2FAD A5CD 6035 332F A671
>