RFR: 8314831: NMT tests ignore vm flags

[Mikhailo Seledtsov]

On Wed, 6 Sep 2023 02:49:40 GMT, Mikhailo Seledtsov <mseledtsov at openjdk.org> wrote:

> Some NMT tests do not pass Java/JVM test command line options (flags) to the child process. Such tests should be examined and broken down into 2 categories:
>   - a test intentionally does not pass flags to child process - mark such tests with "@requires vm.flagless"
>   - tests did not pass flags to child process by mistake - fix them to use the right ProcessTools method that passes test flags to child process
> 
> For details see the JBS issue, including on how the tests were assigned to each category and the reasoning behind it.

To answer a question from Thomas: Are createTestJVM and createJavaProcessBuilder equivalent?

The difference is that createTestJVM() will pass the main/parent JVM command line flags to the child JVM, while createJavaProcessBuilder() will not.

-------------

PR Comment: https://git.openjdk.org/jdk/pull/15576#issuecomment-1708824300