[15] RFR(S): 8247421: [TESTBUG] ReturnBlobToWrongHeapTest.java failed allocating blob

[Nils Eliasson]

Thank you Vladimir!

// Nils

On 2020-06-12 22:39, Vladimir Kozlov wrote:
> Good.
>
> Thanks,
> Vladimir
>
> On 6/12/20 12:37 PM, Nils Eliasson wrote:
>> Hi,
>>
>> This tries to fill up one segment of the code cache with large blobs, 
>> and then fill up the rest with small code blobs. In one test run the 
>> large code blob happened to fill up the code heap precisely, leaving 
>> no room for any small code blob. That made the test fail.
>>
>> "CodeHeap 'non-profiled nmethods': size=11248Kb used=11248Kb 
>> max_used=11248Kb free=0Kb
>>   bounds [0x0000000116701000, 0x00000001171fd000, 0x00000001171fd000]"
>>
>> My fix allocates one small blob first, then continues on with the 
>> large blobs, and finally filling up the rest with small blobs. In 
>> that way there are always a small blob allocated.
>>
>> Bug: https://bugs.openjdk.java.net/browse/JDK-8247421
>> Webrev: http://cr.openjdk.java.net/~neliasso/8247421/webrev.01/
>>
>> Please review,
>> Nils Eliasson