RFR (M): 8015324 : Create tests for CDS feature

[Mikhailo Seledtsov]

Greetings, 

 

Could you, please, review this change? 

 

Webrev: 

   http://cr.openjdk.java.net/~ctornqvi/webrev/8015324/webrev.00/

 

Overview: 

This is a first round of tests for the CDS feature. Specifically, testing how this 

feature works with varying ObjectAlignmentInBytes command line option, since this option

has an impact on the CDS function. 

 

Details: 

One positive test - making sure that CDS archive can be created and loaded at varying

practical values of ObjectAlignmentInBytes. 

 

Second test is negative - making sure VM fails gracefully when loading CDS archive at

object alignment that is different from what was used for archive creation, and reports error correctly.

 

Also some improvements to the test utilities relevant for this test - 

courtesy of Christian. 

 

 

This change is sponsored by Christian. 

 

Thank you,

Misha
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