jdk-24/test/hotspot/gtest/gc/z/test_zPhysicalMemory.cpp

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 2 along with this work; if not, write to the Free Software Foundation,
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#include "precompiled.hpp"
#include "gc/z/zPhysicalMemory.inline.hpp"
#include "unittest.hpp"

TEST(ZPhysicalMemoryTest, copy) {
  const ZPhysicalMemorySegment seg0(0, 100, true);
  const ZPhysicalMemorySegment seg1(200, 100, true);

  ZPhysicalMemory pmem0;
  pmem0.add_segment(seg0);
  EXPECT_EQ(pmem0.nsegments(), 1);
  EXPECT_EQ(pmem0.segment(0).size(), 100u);

  ZPhysicalMemory pmem1;
  pmem1.add_segment(seg0);
  pmem1.add_segment(seg1);
  EXPECT_EQ(pmem1.nsegments(), 2);
  EXPECT_EQ(pmem1.segment(0).size(), 100u);
  EXPECT_EQ(pmem1.segment(1).size(), 100u);

  ZPhysicalMemory pmem2(pmem0);
  EXPECT_EQ(pmem2.nsegments(), 1);
  EXPECT_EQ(pmem2.segment(0).size(), 100u);

  pmem2 = pmem1;
  EXPECT_EQ(pmem2.nsegments(), 2);
  EXPECT_EQ(pmem2.segment(0).size(), 100u);
  EXPECT_EQ(pmem2.segment(1).size(), 100u);
}

TEST(ZPhysicalMemoryTest, add) {
  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(), 0);
  EXPECT_EQ(pmem0.is_null(), true);

  ZPhysicalMemory pmem1;
  pmem1.add_segment(seg0);
  pmem1.add_segment(seg1);
  pmem1.add_segment(seg2);
  pmem1.add_segment(seg3);
  pmem1.add_segment(seg4);
  pmem1.add_segment(seg5);
  pmem1.add_segment(seg6);
  EXPECT_EQ(pmem1.nsegments(), 1);
  EXPECT_EQ(pmem1.segment(0).size(), 7u);
  EXPECT_EQ(pmem1.is_null(), false);

  ZPhysicalMemory pmem2;
  pmem2.add_segment(seg0);
  pmem2.add_segment(seg1);
  pmem2.add_segment(seg2);
  pmem2.add_segment(seg4);
  pmem2.add_segment(seg5);
  pmem2.add_segment(seg6);
  EXPECT_EQ(pmem2.nsegments(), 2);
  EXPECT_EQ(pmem2.segment(0).size(), 3u);
  EXPECT_EQ(pmem2.segment(1).size(), 3u);
  EXPECT_EQ(pmem2.is_null(), false);

  ZPhysicalMemory pmem3;
  pmem3.add_segment(seg0);
  pmem3.add_segment(seg2);
  pmem3.add_segment(seg3);
  pmem3.add_segment(seg4);
  pmem3.add_segment(seg6);
  EXPECT_EQ(pmem3.nsegments(), 3);
  EXPECT_EQ(pmem3.segment(0).size(), 1u);
  EXPECT_EQ(pmem3.segment(1).size(), 3u);
  EXPECT_EQ(pmem3.segment(2).size(), 1u);
  EXPECT_EQ(pmem3.is_null(), false);

  ZPhysicalMemory pmem4;
  pmem4.add_segment(seg0);
  pmem4.add_segment(seg2);
  pmem4.add_segment(seg4);
  pmem4.add_segment(seg6);
  EXPECT_EQ(pmem4.nsegments(), 4);
  EXPECT_EQ(pmem4.segment(0).size(), 1u);
  EXPECT_EQ(pmem4.segment(1).size(), 1u);
  EXPECT_EQ(pmem4.segment(2).size(), 1u);
  EXPECT_EQ(pmem4.segment(3).size(), 1u);
  EXPECT_EQ(pmem4.is_null(), false);
}

TEST(ZPhysicalMemoryTest, remove) {
  ZPhysicalMemory pmem;

  pmem.add_segment(ZPhysicalMemorySegment(10, 10, true));
  pmem.add_segment(ZPhysicalMemorySegment(30, 10, true));
  pmem.add_segment(ZPhysicalMemorySegment(50, 10, true));
  EXPECT_EQ(pmem.nsegments(), 3);
  EXPECT_EQ(pmem.size(), 30u);
  EXPECT_FALSE(pmem.is_null());

  pmem.remove_segments();
  EXPECT_EQ(pmem.nsegments(), 0);
  EXPECT_EQ(pmem.size(), 0u);
  EXPECT_TRUE(pmem.is_null());
}

TEST(ZPhysicalMemoryTest, split) {
  ZPhysicalMemory pmem;

  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(), 2);
  EXPECT_EQ(pmem.size(), 30u);

  ZPhysicalMemory pmem0 = pmem.split(1);
  EXPECT_EQ(pmem0.nsegments(), 1);
  EXPECT_EQ(pmem0.size(), 1u);
  EXPECT_EQ(pmem.nsegments(), 2);
  EXPECT_EQ(pmem.size(), 29u);

  ZPhysicalMemory pmem1 = pmem.split(25);
  EXPECT_EQ(pmem1.nsegments(), 2);
  EXPECT_EQ(pmem1.size(), 25u);
  EXPECT_EQ(pmem.nsegments(), 1);
  EXPECT_EQ(pmem.size(), 4u);

  ZPhysicalMemory pmem2 = pmem.split(4);
  EXPECT_EQ(pmem2.nsegments(), 1);
  EXPECT_EQ(pmem2.size(), 4u);
  EXPECT_EQ(pmem.nsegments(), 0);
  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(), 4);
  EXPECT_EQ(pmem0.size(), 40u);

  ZPhysicalMemory pmem1 = pmem0.split_committed();
  EXPECT_EQ(pmem0.nsegments(), 2);
  EXPECT_EQ(pmem0.size(), 20u);
  EXPECT_EQ(pmem1.nsegments(), 2);
  EXPECT_EQ(pmem1.size(), 20u);
}