On Thu, 1 Jun 2023 08:58:23 GMT, SUN Guoyun <[email protected]> wrote:
>> command: make test CONF=fastdebug JTREG="VM_OPTIONS=-Xcomp"
>> TEST=gc/TestAllocHumongousFragment.java
>> error info:
>>
>> Caused by: java.lang.NullPointerException: Cannot invoke
>> "sun.util.locale.BaseLocale.getVariant()" because "base" is null
>> at java.base/java.util.Locale.forLanguageTag(Locale.java:1802)
>> at
>> java.base/sun.util.cldr.CLDRBaseLocaleDataMetaInfo.<clinit>(CLDRBaseLocaleDataMetaInfo.java:41)
>> ... 24 more
>>
>> Note that the test runs with -XX:ShenandoahGCHeuristics=aggressive
>> -XX:+ShenandoahOOMDuringEvacALot and SoftReferences are involved
>> (LocaleObjectCache uses SoftReferences, used by printf method called in
>> getRandomInstance(Utils.java:511)).
>>
>> Maybe we have to deal with the case where the getBaseLocale() return value
>> is null. the call stack is:
>>
>> at
>> java.base/sun.util.locale.LocaleObjectCache.get(LocaleObjectCache.java:64)
>> at java.base/sun.util.locale.BaseLocale.getInstance(BaseLocale.java:169)
>> at
>> java.base/sun.util.locale.InternalLocaleBuilder.getBaseLocale(InternalLocaleBuilder.java:524)
>> at java.base/java.util.Locale.forLanguageTag(Locale.java:1874)
>>
>> in LocaleObjectCache.java:64
>>
>> 62 if (key == null || newVal == null) {
>>
>> 63 // subclass must return non-null key/value object
>>
>> 64 return null; // run here
>> 65 }
>
> SUN Guoyun has refreshed the contents of this pull request, and previous
> commits have been removed. The incremental views will show differences
> compared to the previous content of the PR. The pull request contains one new
> commit since the last revision:
>
> 8289220: Locale.forLanguageTag throws NPE due to soft ref used in locale
> cache being cleared
As to the patch, would you please elaborate on your changes more? To me, it is
simply inlining `Key.normalize(key)` content into `Cache.createObject()`, and
not sure how it prevents the issue in which the referent got GC'ed during the
reference creation and use.
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PR Comment: https://git.openjdk.org/jdk/pull/14211#issuecomment-1572826469
