RFR(XS): https://bugs.openjdk.java.net/browse/JDK-8240840

[Yumin Qi]

Calvin
   Thanks!

Yumin

On 3/10/20 2:20 PM, Calvin Cheung wrote:
> Looks good.
>
> thanks,
> Calvin
>
> On 3/10/20 2:11 PM, Yumin Qi wrote:
>> Hi,
>>   I just pushed 8240691: 
>> https://bugs.openjdk.java.net/browse/JDK-8240691 but wrongly included 
>> changes in whitbox.cpp which should not change in this bug. Instead 
>> it is for bug 8240563.
>>
>> --- a/src/hotspot/share/prims/whitebox.cpp    Tue Mar 10 20:51:09 
>> 2020 +0300
>> +++ b/src/hotspot/share/prims/whitebox.cpp    Tue Mar 10 11:52:53 
>> 2020 -0700
>> @@ -1990,12 +1990,6 @@
>>
>>  WB_ENTRY(jboolean, WB_IsCDSIncludedInVmBuild(JNIEnv* env))
>>  #if INCLUDE_CDS
>> -# ifdef _LP64
>> -    if (!UseCompressedOops || !UseCompressedClassPointers) {
>> -      // On 64-bit VMs, CDS is supported only with compressed 
>> oops/pointers
>> -      return false;
>> -    }
>> -# endif // _LP64
>>    return true;
>>  #else
>>    return false;
>>
>> Now I need add it back since it will fail other two test cases:
>> test/hotspot/jtreg/runtime/cds/appcds/CommandLineFlagComboNegative.java
>> test/hotspot/jtreg/runtime/cds/appcds/TestZGCWithCDS.java
>>
>> The diff for roll back is:
>>  WB_ENTRY(jboolean, WB_IsCDSIncludedInVmBuild(JNIEnv* env))
>>  #if INCLUDE_CDS
>> +# ifdef _LP64
>> +    if (!UseCompressedOops || !UseCompressedClassPointers) {
>> +      // On 64-bit VMs, CDS is supported only with compressed 
>> oops/pointers
>> +      return false;
>> +    }
>> +# endif // _LP64
>>    return true;
>>  #else
>>    return false;
>>
>> Seek approval for this accidental change.
>>
>> Thanks
>> Yumin