RFR: 8335977: Deoptimization fails with assert "object should be reallocated already"

[Tobias Hartmann]

On Mon, 21 Oct 2024 20:27:10 GMT, Cesar Soares Lucas <cslucas at openjdk.org> wrote:

> Please, review this patch to fix an issue that may occur when serializing debug information related to reduce allocation merges. The problem happens when there are more than one JVMS in a `uncommon_trap` and a _younger_ JVMS doesn't have the RAM inputs as a local/expression/monitor but an older JVMS does. In that situation the loop at line 1173 of output.cpp will set the `is_root` property of the ObjectValue to `false` when processing the younger JVMS even though it may have been set to `true` when visiting the older JVMS.
> 
> Tested on: 
>  - Win, Mac & Linux tier1-4 on x64 & Aarch64.
>  - CTW with some thousands of jars.

I executed some extended testing. All green.

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PR Comment: https://git.openjdk.org/jdk/pull/21624#issuecomment-2430956271