RFR: 8222664: runtime/appcds/sharedStrings/SharedStringsStress.java assert GC active during NoGCVerifier

[Ioi Lam]

Looks good. Thanks for fixing this.

- Ioi

On 4/23/19 12:55 AM, Per Liden wrote:
> Deduplication of Strings must not happen when we're in a safepoint. 
> However, during startup, we fail to block safepoint when calling 
> deduplicate_shared_strings(), which sometimes results in hitting the 
> NoSafepointVerifier assert.
>
> Testing: tier1-3
>
> Bug: https://bugs.openjdk.java.net/browse/JDK-8222664
> Webrev: http://cr.openjdk.java.net/~pliden/8222664/webrev.0
>
> /Per