How to get reference processing logging?

[Mikael Gerdin]

Hi Andrew,

On 2016-12-07 12:08, Andrew Haley wrote:
> I've tried "-Xlog:gc::ref" and "-Xlog:gc=ref" but neither works.
>
> I want to see this output:
>
>   log_debug(gc, ref)("Ref Counts: Soft: " SIZE_FORMAT " Weak: " SIZE_FORMAT " Final: " SIZE_FORMAT " Phantom: " SIZE_FORMAT,
>                      stats.soft_count(), stats.weak_count(), stats.final_count(), stats.phantom_count());
>   log_develop_trace(gc, ref)("JNI Weak Reference count: " SIZE_FORMAT, count_jni_refs());
>
>
> I tried -Xlog:help and searc hed on the web for information about the
> -Xlog syntax, but no luck.

The -Xlog:help output probably needs an example to cover this case.
The command line you want is
-Xlog:gc+ref=debug
and
-Xlog:gc+ref=trace
respectively.

The tag syntax also allows wildcards, so if you want to see all the 
reference processing logging you could use
-Xlog:ref*=trace

Hope this clarifies it a bit
/Mikael

>
> Thanks,
>
> Andrew.
>