[jdk20] RFR: 8298400: Virtual thread instability when stack overflows

[Ron Pressler]

On Thu, 12 Jan 2023 12:12:42 GMT, Ron Pressler <rpressler at openjdk.org> wrote:

> The stack overflow is detected in the native code and a pending exception is set, but it is not thrown.
> 
> Additionally, the stack overflow detection is changed use StackOverflow::shadow_zone_safe_limit rather than StackOverflow::stack_overflow_limit.

@theRealAph says the remaining failures are a separate ScopedValue bug.

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PR: https://git.openjdk.org/jdk20/pull/101