RFR: 8286940: [IR Framework] Allow IR tests to build and use Whitebox without -DSkipWhiteBoxInstall=true

[Vladimir Kozlov]

On Wed, 25 May 2022 08:17:17 GMT, Christian Hagedorn <chagedorn at openjdk.org> wrote:

> Currently, the IR framework always tries to install the Whitebox by moving the Whitebox class file to the JTreg class path. However, when a test already builds the Whitebox and uses it as part of the test, we cannot access it on certain platforms. On Windows, for example, we'll get the following exception:
> 
> Caused by: java.nio.file.FileSystemException: sun\hotspot\WhiteBox.class: The process cannot access the file because it is being used by another process
> 
> To mitigate this problem, one can specify `-DSkipWhiteBoxInstall=true` which was already done in [JDK-8283187](https://bugs.openjdk.java.net/browse/JDK-8283187). But this is not a good solution as the user should not need to worry about the inner workings of the IR framework.
> 
> I propose to get rid of this flag by reworking the Whitebox installation process.
> 
> Thanks,
> Christian

Good.

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Marked as reviewed by kvn (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/8879