RFR: 8033441: print line numbers with -XX:+PrintOptoAssembly

[Jason Tatton]

On Tue, 17 Nov 2020 19:31:25 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.

> Two code snippets are same logic. Maybe it's a good idea to have a private member function.
> you can treat this as an optional suggestion.
>

Thanks Xin, I have refactored the code to use a private member function as advised

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