RFR: 8033441: print line numbers with -XX:+PrintOptoAssembly [v2]

[Jie Fu]

On Wed, 18 Nov 2020 21:42:23 GMT, Jason Tatton <github.com+70893615+jasontatton-aws at openjdk.org> wrote:

>> Hi all,
>> 
>> Here is a patch which adds line number information to the `-XX:+PrintOptoAssembly` cmd line option output.
>> 
>> A new unit test is provided for this functionality. Note that the build must have debugging enabled for the test to be relevant and enabled.
>> 
>> Here is an example output:-
>> before:
>>         # Tryme::foo @ bci:3  L[0]=_ STK[0]=#NULL STK[1]=#Ptr0x0000ffff340089c0
>> 
>> after:
>>         # Tryme::foo @ bci:3 (line 12)  L[0]=_ STK[0]=#NULL STK[1]=#Ptr0x0000ffff1008fd80
>> 
>> Testing:
>> I have run tier 1/2 on linux on x86 and aarch64. With a `--enable-debug` build.
>
> Jason Tatton has updated the pull request incrementally with one additional commit since the last revision:
> 
>   refactored linenumber output to print_method_with_lineno method and tweaked unit test

It's helpful for debugging.
LGTM
Thanks.

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Marked as reviewed by jiefu (Committer).

PR: https://git.openjdk.java.net/jdk/pull/1272