RFR (XS) 8247860: Shenandoah: add update watermark line in rich assert failure message

[Roman Kennke]

Looks good!

Roman

On Thu, 2020-06-18 at 18:23 +0200, Aleksey Shipilev wrote:
> RFE:
>   https://bugs.openjdk.java.net/browse/JDK-8247860
> 
> Patch:
> 
> diff -r dbd95dd97289
> src/hotspot/share/gc/shenandoah/shenandoahAsserts.cpp
> --- a/src/hotspot/share/gc/shenandoah/shenandoahAsserts.cpp     Tue
> Jun 16 15:18:58 2020 -0400
> +++ b/src/hotspot/share/gc/shenandoah/shenandoahAsserts.cpp     Thu
> Jun 18 18:23:27 2020 +0200
> @@ -68,4 +68,5 @@
>    msg.append("  " PTR_FORMAT " - klass " PTR_FORMAT " %s\n",
> p2i(obj), p2i(obj->klass()),
> obj->klass()->external_name());
>    msg.append("    %3s allocated after mark start\n", ctx-
> >allocated_after_mark_start(obj) ? "" :
> "not");
> +  msg.append("    %3s after update
> watermark\n",     cast_from_oop<HeapWord*>(obj) >=
> r->get_update_watermark() ? "" : "not");
>    msg.append("    %3s marked \n",                    ctx-
> >is_marked(obj) ? "" : "not");
>    msg.append("    %3s in collection set\n",          heap-
> >in_collection_set(obj) ? "" : "not");
> 
> Testing: hotspot_gc_shenandoah
>