RFR: 8303921: serviceability/sa/UniqueVtableTest.java timed out

[Daniel D. Daugherty]

On Tue, 14 Mar 2023 22:05:44 GMT, Alex Menkov <amenkov at openjdk.org> wrote:

> The change:
> - updates UniqueVtableTest to follow standard SA way - attach to target from subprocess and use SATestUtils.addPrivilegesIfNeeded for the subprocess;
> - updates several tests in the same directory to resolve NoClassDefFoundError failures; It's known JTReg issue that "@build" actions for part of used shared classes may cause intermittent NoClassDefFoundError in other tests which use the same shared library classpath.
> 
> Tested: 100 runs on all platforms, no failures

test/hotspot/jtreg/serviceability/sa/UniqueVtableTest.java line 34:

> 32:  *          jdk.hotspot.agent/sun.jvm.hotspot.types.basic
> 33:  *
> 34:  * @run driver UniqueVtableTest

The other tests you touched in this PR use:
`@run main/othervm ...`
so why did this one have to change to:
`@run driver ...`

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PR: https://git.openjdk.org/jdk/pull/13030