RFR: 8291555: Replace stack-locking with fast-locking [v3]

[Fei Yang]

On Fri, 14 Oct 2022 01:19:27 GMT, Fei Yang <fyang at openjdk.org> wrote:

> > Here is the basic support for RISC-V: https://cr.openjdk.java.net/~shade/8291555/riscv-patch-1.patch
> > -- I adapted this from AArch64 changes, and tested it very lightly. @RealFYang, can I leave the testing and follow up fixes to you?
> 
> @shipilev : Sure, I am happy to to that! Thanks for porting this to RISC-V :-)

@shipilev : After applying this on today's jdk master, linux-riscv64 fastdebug fail to build on HiFive Unmatched. I see JVM crash happens during the build process. I suppose you carried out the test with some release build, right?

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PR: https://git.openjdk.org/jdk/pull/10590