On Tue, 20 Oct 2026 06:30:42 GMT, Yasumasa Suenaga <[email protected]> wrote:
>> Valhalla introduced flattened value object, however SA cannot dump it into
>> heapdump e.g. `jhsdb jmap --binaryheap`.
>> Actually HeapHprofBinWriter.java has following lines. Hence the user cannot
>> check flattened object from heapdump generated by SA.
>>
>>
>> case JVM_SIGNATURE_CLASS:
>> case JVM_SIGNATURE_ARRAY: {
>> if (field.isFlat()) {
>> // FIXME - we don't handle flattened fields yet. Just treat
>> them
>> // as a null reference. See JDK-8381370.
>> writeObjectID(null);
>>
>>
>> This PR addressed it.
>>
>> ---------
>> - [x] I confirm that I make this contribution in accordance with the
>> [OpenJDK Interim AI Policy](https://openjdk.org/legal/ai).
>
> Yasumasa Suenaga has updated the pull request incrementally with one
> additional commit since the last revision:
>
> Use getFieldHolder() rather than getKlass()
Heap dumper in HotSpot would defer dump flattened objects, and would give
sequential ID. This PR follows its manner.
-------------
PR Comment: https://git.openjdk.org/jdk/pull/33395#issuecomment-6304796412
