This issue was reported by huangjia@loongson.cn

When dumping the info of heap region, the description for "OA" and "CA" seems to be lost.
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[4.544s][error][gc,verify] Heap Regions: E=young(eden), S=young(survivor), O=old, HS=humongous(starts), HC=humongous(continues), CS=collection set, F=free, A=archive, TAMS=top-at-mark-start (previous, next)
[4.544s][error][gc,verify] | 0|0x000000060c800000, 0x000000060c900000, 0x000000060c900000|100%| O| |TAMS 0x000000060c900000, 0x000000060c800000| Untracked
[4.544s][error][gc,verify] | 1|0x000000060c900000, 0x000000060c937a00, 0x000000060ca00000| 21%| O| |TAMS 0x000000060c937a00, 0x000000060c900000| Untracked
[4.544s][error][gc,verify] | 2|0x000000060ca00000, 0x000000060ca00000, 0x000000060cb00000| 0%| F| |TAMS 0x000000060ca00000, 0x000000060ca00000| Untracked
[4.544s][error][gc,verify] | 3|0x000000060cb00000, 0x000000060cb00000, 0x000000060cc00000| 0%| F| |TAMS 0x000000060cb00000, 0x000000060cb00000| Untracked
[4.544s][error][gc,verify] | 4|0x000000060cc00000, 0x000000060cc00000, 0x000000060cd00000| 0%| F| |TAMS 0x000000060cc00000, 0x000000060cc00000| Untracked
[4.544s][error][gc,verify] | 5|0x000000060cd00000, 0x000000060cd2ade8, 0x000000060ce00000| 16%| S|CS|TAMS 0x000000060cd00000, 0x000000060cd00000| Complete
[4.544s][error][gc,verify] | 6|0x000000060ce00000, 0x000000060ce00000, 0x000000060cf00000| 0%| F| |TAMS 0x000000060ce00000, 0x000000060ce00000| Untracked
[4.544s][error][gc,verify] | 7|0x000000060cf00000, 0x000000060cf98410, 0x000000060d000000| 59%| E| |TAMS 0x000000060cf00000, 0x000000060cf00000| Complete
[4.544s][error][gc,verify] |7990|0x00000007ffe00000, 0x00000007ffe54000, 0x00000007fff00000| 32%|OA| |TAMS 0x00000007ffe54000, 0x00000007ffe00000| Untracked
[4.544s][error][gc,verify] |7991|0x00000007fff00000, 0x00000007fff70000, 0x0000000800000000| 43%|CA| |TAMS 0x00000007fff70000, 0x00000007fff00000| Untracked
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It might be better to add them by the following fix
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diff -r 778fc2dcbdaa src/hotspot/share/gc/g1/g1CollectedHeap.cpp
--- a/src/hotspot/share/gc/g1/g1CollectedHeap.cpp Wed Sep 18 20:49:13 2019 -0400
+++ b/src/hotspot/share/gc/g1/g1CollectedHeap.cpp Thu Sep 19 11:47:07 2019 +0800
@@ -2378,6 +2378,7 @@
   st->print_cr("Heap Regions: E=young(eden), S=young(survivor), O=old, "
                "HS=humongous(starts), HC=humongous(continues), "
                "CS=collection set, F=free, A=archive, "
+ "OA=open archive, CA=closed archive, "
                "TAMS=top-at-mark-start (previous, next)");
   PrintRegionClosure blk(st);
   heap_region_iterate(&blk);
-----------------------------------

- After the patch
-----------------------------------
[5.036s][error][gc,verify] Heap Regions: E=young(eden), S=young(survivor), O=old, HS=humongous(starts), HC=humongous(continues), CS=collection set, F=free, A=archive, OA=open archive, CA=closed archive, TAMS=top-at-mark-start (previous, next)
[5.036s][error][gc,verify] | 0|0x000000060c800000, 0x000000060c900000, 0x000000060c900000|100%| O| |TAMS 0x000000060c900000, 0x000000060c800000| Untracked
[5.036s][error][gc,verify] | 1|0x000000060c900000, 0x000000060c939c00, 0x000000060ca00000| 22%| O| |TAMS 0x000000060c939c00, 0x000000060c900000| Untracked
[5.036s][error][gc,verify] | 2|0x000000060ca00000, 0x000000060ca00000, 0x000000060cb00000| 0%| F| |TAMS 0x000000060ca00000, 0x000000060ca00000| Untracked
[5.036s][error][gc,verify] | 3|0x000000060cb00000, 0x000000060cb00000, 0x000000060cc00000| 0%| F| |TAMS 0x000000060cb00000, 0x000000060cb00000| Untracked
[5.036s][error][gc,verify] | 4|0x000000060cc00000, 0x000000060cc00000, 0x000000060cd00000| 0%| F| |TAMS 0x000000060cc00000, 0x000000060cc00000| Untracked
[5.036s][error][gc,verify] | 5|0x000000060cd00000, 0x000000060cd25170, 0x000000060ce00000| 14%| S|CS|TAMS 0x000000060cd00000, 0x000000060cd00000| Complete
[5.036s][error][gc,verify] | 6|0x000000060ce00000, 0x000000060ce00000, 0x000000060cf00000| 0%| F| |TAMS 0x000000060ce00000, 0x000000060ce00000| Untracked
[5.036s][error][gc,verify] | 7|0x000000060cf00000, 0x000000060cf98390, 0x000000060d000000| 59%| E| |TAMS 0x000000060cf00000, 0x000000060cf00000| Complete
[5.036s][error][gc,verify] |7990|0x00000007ffe00000, 0x00000007ffe54000, 0x00000007fff00000| 32%|OA| |TAMS 0x00000007ffe54000, 0x00000007ffe00000| Untracked
[5.036s][error][gc,verify] |7991|0x00000007fff00000, 0x00000007fff70000, 0x0000000800000000| 43%|CA| |TAMS 0x00000007fff70000, 0x00000007fff00000| Untracked
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