jdk-24/test/hotspot/gtest/gc/x/test_xLiveMap.cpp

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * This code is free software; you can redistribute it and/or modify it
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 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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#include "precompiled.hpp"
#include "gc/x/xLiveMap.inline.hpp"
#include "unittest.hpp"

class XLiveMapTest : public ::testing::Test {
protected:
  static void strongly_live_for_large_xpage() {
    // Large XPages only have room for one object.
    XLiveMap livemap(1);

    bool inc_live;
    uintptr_t object = 0u;

    // Mark the object strong.
    livemap.set(object, false /* finalizable */, inc_live);

    // Check that both bits are in the same segment.
    ASSERT_EQ(livemap.index_to_segment(0), livemap.index_to_segment(1));

    // Check that the object was marked.
    ASSERT_TRUE(livemap.get(0));

    // Check that the object was strongly marked.
    ASSERT_TRUE(livemap.get(1));

    ASSERT_TRUE(inc_live);
  }
};

TEST_F(XLiveMapTest, strongly_live_for_large_xpage) {
  strongly_live_for_large_xpage();
}