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

Tobias Hartmann tobias.hartmann at oracle.com
Fri Jul 28 09:20:55 UTC 2017


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


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