[lworld] RFR: 8327636: [lworld] Make primitive wrappers be value class if preview feature is enabled [v2]

[Chen Liang]

On Fri, 8 Mar 2024 04:56:15 GMT, Mandy Chung <mchung at openjdk.org> wrote:

>> src/java.base/share/classes/sun/invoke/util/VerifyAccess.java line 212:
>> 
>>> 210: 
>>> 211:             // exports are not setup during early VM initialization
>>> 212:             if (!jdk.internal.misc.VM.isModuleSystemInited()) {
>> 
>> Should we merge this and the `lookupModule == null` early startup cases, and `assert lookupModule == refModule && refModule == Object.class.getModule()` can become `assert lookupModule == refModule && (refModule == null || refModule == Object.class.getModule())`?
>
> It can be simpler:
> 
> 
>             // early VM startup case, java.base not defined or module system not initialized
>             if (lookupModule == null || !jdk.internal.misc.VM.isModuleSystemInited()) {
>                 assert lookupModule == refModule;
>                 return true;
>             }

Can `Class::getModule` ever return `null` after module system is initialized? If not we can omit the `lookupModule == null` check.

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PR Review Comment: https://git.openjdk.org/valhalla/pull/1040#discussion_r1517169212