RFR: 8311846: Resolve duplicate 'Thread' related symbols with JDK static linking

[Andrew Haley]

On Wed, 17 Jan 2024 00:14:58 GMT, Jiangli Zhou <jiangli at openjdk.org> wrote:

> Please review this PR with a simple solution for resolving duplicate `Thread` symbol issue. In https://github.com/openjdk/jdk/pull/14808 comments, there was an alternative suggestion to redefine the symbol at build time, such as  using`-DThread=HotSpotThread`. That would not address issues when symbol were references as string literals. https://github.com/openjdk/jdk/pull/14808 also discussed using namespace for hotspot code, which can have multiple benefits/motivations. We could explore further using namespace with more consensus on that approach.
> 
> Contributed by Chuck Rasbold and @jianglizhou.

Hooboy, this is an ugly solution, with some nasty side effects such as confusing error mesasges for developers and a very confusing debugger experience. Let's try to find a solution with a smaller blast radius.

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PR Comment: https://git.openjdk.org/jdk/pull/17456#issuecomment-1895486108