Crash with "assert(number_of_codes <= 256) failed: too many bytecodes"

Karen Kinnear karen.kinnear at oracle.com
Fri Jul 28 14:07:03 UTC 2017


Tobias,

Frederic said that he would work on the cleaner vgetfield removal when he gets back if that is helpful - he was hoping
to work on it with you - since it obviously needs JIT changes as well.

thanks
Karen

> On Jul 28, 2017, at 9:29 AM, Maurizio Cimadamore <maurizio.cimadamore at oracle.com> wrote:
> 
> Whohoo - thanks for looking after my breakages :-)
> 
> Maurizio
> 
> 
> On 28/07/17 13:56, Tobias Hartmann wrote:
>> All tests passed. I've pushed the changes.
>> 
>> With Mandy's fix for 8185148, the repo should be stable again.
>> 
>> Best regards,
>> Tobias
>> 
>> On 28.07.2017 11:20, Tobias Hartmann wrote:
>>> On 28.07.2017 10:57, Tobias Hartmann wrote:
>>>> (2) Oop map generation is broken because there is no way to determine if the _getfield bytecode accesses a value type field.
>>>> -> I had to temporarily disable verification. See changes in generateOopMap.cpp/hpp. Checking itr->raw_code() == Bytecodes::_vgetfield is not sufficient and also a constant pool lookup does not work in all cases.
>>>> Any ideas on how to fix this?
>>> Okay, using the 'CellTypeState::refOrValueType' hack should do the job:
>>> http://cr.openjdk.java.net/~thartmann/valhalla/vt_prototype/webrev.36.hs/src/share/vm/oops/generateOopMap.cpp.sdiff.html
>>> 
>>> Best regards,
>>> Tobias
>>> 
> 



More information about the valhalla-dev mailing list