[foreign-memaccess+abi] RFR: 8287516: Implement fallback Linker [v2]

[Jorn Vernee]

On Thu, 19 Jan 2023 10:55:45 GMT, Maurizio Cimadamore <mcimadamore at openjdk.org> wrote:

> The code looks good and easy to follow - good job! I'm a bit worried re. testing: given that libffi is not included in a regular JDK build, we don't have ways to test this in our CI, which seems bad (how do we detect regressions?).

WRT testing, I think we have access to libffi internally, and should be able to request it in our task definition, which would allow running with `-Djdk.internal.foreign.CABI=FALLBACK` in order to test this.

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PR: https://git.openjdk.org/panama-foreign/pull/770