RFR: 8267908: linux: thread_native_entry can scribble on stack frame

[Xin Liu]

On Tue, 8 Jun 2021 02:02:55 GMT, David Holmes <dholmes at openjdk.org> wrote:

> Please review this trivial fix to ensure we do not try to alloca zero bytes.
> 
> Thanks,
> David

When random is 1, that store is still safe because c++ std says sizeof char is 1.

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PR: https://git.openjdk.java.net/jdk/pull/4407