RFR: 8280029: G1: "Overflow during reference processing, can not continue" on x86_32

[Thomas Schatzl]

On Mon, 17 Jan 2022 14:10:33 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

> The fix looks good. However, bailing out with markstack overflow while the used mark stack size is still way below `MarkStackSizeMax` is still quite counterintuitive.

That's true, and I was looking through the code a bit why we need to do that (bailing out before `MarkStackSizeMax`), but could not find a reason actually; but I probably didn't look for too long. It looks like that that case is simply not implemented :(

I will file an issue, referencing this CR for a test case.

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PR: https://git.openjdk.java.net/jdk/pull/7109