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

Maurizio Cimadamore maurizio.cimadamore at oracle.com
Thu Jul 27 15:58:11 UTC 2017


Wait - if you update these opcodes, then we need to update bytecode 
library as well - see

jdk.experimental.bytecode.Opcode

Maurizio


On 27/07/17 16:31, Tobias Hartmann wrote:
> Hi,
>
> seems like this is due to:
> http://hg.openjdk.java.net/valhalla/valhalla/hotspot/rev/dbb31857c4d4
>
> If I count correctly, adding _vgetfield at the end 'causes number_of_codes' to be 257 and thus we fail.
>
> We should reset the value type bytecode numbers:
>
> diff -r 5cd8d5559192 src/share/vm/interpreter/bytecodes.hpp
> --- a/src/share/vm/interpreter/bytecodes.hpp	Thu Jul 27 16:00:00 2017 +0100
> +++ b/src/share/vm/interpreter/bytecodes.hpp	Thu Jul 27 17:23:40 2017 +0200
> @@ -248,11 +248,11 @@
>       _vstore               = 204, // 0xcc
>       _vaload               = 205, // 0xcd
>       _vastore              = 206, // 0xce
> -    _vreturn              = 210, // 0xd2
> -    _vdefault             = 214, // 0xd6
> -    _vwithfield           = 215, // 0xd7
> -    _vbox                 = 216, // 0xd6
> -    _vunbox               = 217, // 0xd7
> +    _vreturn              = 207, // 0xcf
> +    _vdefault             = 208, // 0xd0
> +    _vwithfield           = 209, // 0xd1
> +    _vbox                 = 210, // 0xd2
> +    _vunbox               = 211, // 0xd3
>   
>       number_of_java_codes,
>
> Thanks,
> Tobias



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