On Tue, 10 Sep 2024 12:03:59 GMT, Thomas Stuefe <stu...@openjdk.org> wrote:
>> src/hotspot/share/oops/compressedKlass.cpp line 214:
>>
>>> 212: ss.print("Class space size (%zu) exceeds the maximum possible size
>>> (%zu)",
>>> 213: len, max_encoding_range_size());
>>> 214: vm_exit_during_initialization(ss.base());
>>
>> Why does this exit and not turn off compressed klass pointers and compact
>> object headers?
>
> This is tricky. We are already deep in initialization and have done a couple
> of decisions based on +UseCompressedClassPointers (e.g. CDS setup). I *think*
> we could still go with -UseCCP, but I wonder whether this is wise.
>
> Note that this error is not new. In the old code, we simply asserted. That
> left us with UB in release builds, which remains unresolved. I simply made
> the error explicit in release too.
Ok, in this case, that's fine if we already asserted. A fatal error is better.
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PR Review Comment: https://git.openjdk.org/jdk/pull/20677#discussion_r1751840556
