RFR: 8327247: C2 uses up to 2GB of RAM to compile complex string concat in extreme cases [v2]

[Claes Redestad]

On Fri, 26 Apr 2024 02:36:22 GMT, Chen Liang <liach at openjdk.org> wrote:

> Also a side note for backport: ClassFileDumper exists only since JDK 21, so for earlier backports you need to use an alternative dumping method or remove dumping ability.

Yes, original code used ProxyClassDumper, which was renamed/reworked in 21 by [JDK-8304846](https://bugs.openjdk.org/browse/JDK-8304846). I think we've gone as far as we can code-wise in ensuring this is cleanly backportable to at least 21. I'll add a comment about ProxyClassDumper.

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PR Comment: https://git.openjdk.org/jdk/pull/18953#issuecomment-2078910803