--- old/test/hotspot/gtest/gc/z/test_zPhysicalMemory.cpp	2020-05-18 23:08:39.028971907 +0200
+++ new/test/hotspot/gtest/gc/z/test_zPhysicalMemory.cpp	2020-05-18 23:08:38.693961040 +0200
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016, 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2016, 2020, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -26,8 +26,8 @@
 #include "unittest.hpp"
 
 TEST(ZPhysicalMemoryTest, copy) {
-  const ZPhysicalMemorySegment seg0(0, 100);
-  const ZPhysicalMemorySegment seg1(200, 100);
+  const ZPhysicalMemorySegment seg0(0, 100, true);
+  const ZPhysicalMemorySegment seg1(200, 100, true);
 
   ZPhysicalMemory pmem0;
   pmem0.add_segment(seg0);
@@ -52,13 +52,13 @@
 }
 
 TEST(ZPhysicalMemoryTest, segments) {
-  const ZPhysicalMemorySegment seg0(0, 1);
-  const ZPhysicalMemorySegment seg1(1, 1);
-  const ZPhysicalMemorySegment seg2(2, 1);
-  const ZPhysicalMemorySegment seg3(3, 1);
-  const ZPhysicalMemorySegment seg4(4, 1);
-  const ZPhysicalMemorySegment seg5(5, 1);
-  const ZPhysicalMemorySegment seg6(6, 1);
+  const ZPhysicalMemorySegment seg0(0, 1, true);
+  const ZPhysicalMemorySegment seg1(1, 1, true);
+  const ZPhysicalMemorySegment seg2(2, 1, true);
+  const ZPhysicalMemorySegment seg3(3, 1, true);
+  const ZPhysicalMemorySegment seg4(4, 1, true);
+  const ZPhysicalMemorySegment seg5(5, 1, true);
+  const ZPhysicalMemorySegment seg6(6, 1, true);
 
   ZPhysicalMemory pmem0;
   EXPECT_EQ(pmem0.nsegments(), 0u);
@@ -116,9 +116,9 @@
 TEST(ZPhysicalMemoryTest, split) {
   ZPhysicalMemory pmem;
 
-  pmem.add_segment(ZPhysicalMemorySegment(0, 10));
-  pmem.add_segment(ZPhysicalMemorySegment(10, 10));
-  pmem.add_segment(ZPhysicalMemorySegment(30, 10));
+  pmem.add_segment(ZPhysicalMemorySegment(0, 10, true));
+  pmem.add_segment(ZPhysicalMemorySegment(10, 10, true));
+  pmem.add_segment(ZPhysicalMemorySegment(30, 10, true));
   EXPECT_EQ(pmem.nsegments(), 2u);
   EXPECT_EQ(pmem.size(), 30u);
 
@@ -140,3 +140,63 @@
   EXPECT_EQ(pmem.nsegments(), 0u);
   EXPECT_EQ(pmem.size(), 0u);
 }
+
+TEST(ZPhysicalMemoryTest, split_committed) {
+  ZPhysicalMemory pmem0;
+  pmem0.add_segment(ZPhysicalMemorySegment(0, 10, true));
+  pmem0.add_segment(ZPhysicalMemorySegment(10, 10, false));
+  pmem0.add_segment(ZPhysicalMemorySegment(20, 10, true));
+  pmem0.add_segment(ZPhysicalMemorySegment(30, 10, false));
+  EXPECT_EQ(pmem0.nsegments(), 4u);
+  EXPECT_EQ(pmem0.size(), 40u);
+
+  ZPhysicalMemory pmem1 = pmem0.split_committed();
+  EXPECT_EQ(pmem0.nsegments(), 2u);
+  EXPECT_EQ(pmem0.size(), 20u);
+  EXPECT_EQ(pmem1.nsegments(), 2u);
+  EXPECT_EQ(pmem1.size(), 20u);
+}
+
+TEST(ZPhysicalMemoryTest, transfer0) {
+  ZPhysicalMemory pmem0;
+  ZPhysicalMemory pmem1;
+
+  pmem0.add_segment(ZPhysicalMemorySegment(10, 10, true));
+  pmem0.add_segment(ZPhysicalMemorySegment(30, 10, true));
+  pmem0.add_segment(ZPhysicalMemorySegment(50, 10, true));
+  EXPECT_EQ(pmem0.nsegments(), 3u);
+  EXPECT_EQ(pmem0.size(), 30u);
+
+  pmem1.add_segment(ZPhysicalMemorySegment(20, 10, true));
+  pmem1.add_segment(ZPhysicalMemorySegment(40, 10, true));
+  pmem1.add_segment(ZPhysicalMemorySegment(60, 10, true));
+  EXPECT_EQ(pmem1.nsegments(), 3u);
+  EXPECT_EQ(pmem1.size(), 30u);
+
+  pmem0.transfer_segments(pmem1);
+  EXPECT_EQ(pmem0.nsegments(), 1u);
+  EXPECT_EQ(pmem0.size(), 60u);
+  EXPECT_TRUE(pmem1.is_null());
+}
+
+TEST(ZPhysicalMemoryTest, transfer1) {
+  ZPhysicalMemory pmem0;
+  ZPhysicalMemory pmem1;
+
+  pmem0.add_segment(ZPhysicalMemorySegment(10, 10, true));
+  pmem0.add_segment(ZPhysicalMemorySegment(30, 10, true));
+  pmem0.add_segment(ZPhysicalMemorySegment(50, 10, true));
+  EXPECT_EQ(pmem0.nsegments(), 3u);
+  EXPECT_EQ(pmem0.size(), 30u);
+
+  pmem1.add_segment(ZPhysicalMemorySegment(20, 10, false));
+  pmem1.add_segment(ZPhysicalMemorySegment(40, 10, false));
+  pmem1.add_segment(ZPhysicalMemorySegment(60, 10, false));
+  EXPECT_EQ(pmem1.nsegments(), 3u);
+  EXPECT_EQ(pmem1.size(), 30u);
+
+  pmem0.transfer_segments(pmem1);
+  EXPECT_EQ(pmem0.nsegments(), 6u);
+  EXPECT_EQ(pmem0.size(), 60u);
+  EXPECT_TRUE(pmem1.is_null());
+}