RFR: 8377797: Remove SA support for MethodData and the printmdo command [v3]

[Vladimir Kozlov]

On Fri, 13 Feb 2026 18:24:57 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

>> This change removes MethodData code copied into SA that's out of date for the valhalla repo.
>> 
>> Tested with tier1-3.
>
> Coleen Phillimore has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Remove the doc.

I often use VM flag like this `-XX:CompileCommand=print,java.lang.String::length ` to see JIT compiled code assembly and corresponding MDO with profiling information:


------------------------------------------------------------------------
java.lang.String::length()I
  interpreter_invocation_count:         292
  invocation_counter:                   292
  backedge_counter:                       0
  decompile_count:                        0
  mdo size: 328 bytes

   0 fast_aaccess_0
   1 fast_agetfield 9 <java/lang/String.value:[B>
   4 arraylength
   5 fast_aload_0
   6 invokevirtual 322 <java/lang/String.coder()B>
   9 ishr
  10 ireturn
------------------------------------------------------------------------

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PR Comment: https://git.openjdk.org/jdk/pull/29693#issuecomment-3915941336