jdk

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/*
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 * Copyright (c) 2020, 2021, Oracle and/or its affiliates. All rights reserved.
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 * Copyright (c) 2020 SAP SE. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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#include "precompiled.hpp"
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#include "memory/metaspace.hpp"
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#include "memory/metaspaceUtils.hpp"
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#include "unittest.hpp"
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TEST_VM(MetaspaceUtils, reserved) {
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  size_t reserved = MetaspaceUtils::reserved_bytes();
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  EXPECT_GT(reserved, 0UL);
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  size_t reserved_metadata = MetaspaceUtils::reserved_bytes(Metaspace::NonClassType);
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  EXPECT_GT(reserved_metadata, 0UL);
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  EXPECT_LE(reserved_metadata, reserved);
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}
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TEST_VM(MetaspaceUtils, reserved_compressed_class_pointers) {
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  if (!UseCompressedClassPointers) {
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    return;
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  }
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  size_t reserved = MetaspaceUtils::reserved_bytes();
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  EXPECT_GT(reserved, 0UL);
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  size_t reserved_class = MetaspaceUtils::reserved_bytes(Metaspace::ClassType);
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  EXPECT_GT(reserved_class, 0UL);
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  EXPECT_LE(reserved_class, reserved);
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}
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TEST_VM(MetaspaceUtils, committed) {
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  size_t committed = MetaspaceUtils::committed_bytes();
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  EXPECT_GT(committed, 0UL);
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  size_t reserved  = MetaspaceUtils::reserved_bytes();
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  EXPECT_LE(committed, reserved);
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  size_t committed_metadata = MetaspaceUtils::committed_bytes(Metaspace::NonClassType);
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  EXPECT_GT(committed_metadata, 0UL);
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  EXPECT_LE(committed_metadata, committed);
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}
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TEST_VM(MetaspaceUtils, committed_compressed_class_pointers) {
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  if (!UseCompressedClassPointers) {
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    return;
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  }
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  size_t committed = MetaspaceUtils::committed_bytes();
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  EXPECT_GT(committed, 0UL);
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  size_t committed_class = MetaspaceUtils::committed_bytes(Metaspace::ClassType);
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  EXPECT_GT(committed_class, 0UL);
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  EXPECT_LE(committed_class, committed);
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}
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TEST_VM(MetaspaceUtils, non_compressed_class_pointers) {
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  if (UseCompressedClassPointers) {
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    return;
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  }
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  size_t committed_class = MetaspaceUtils::committed_bytes(Metaspace::ClassType);
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  EXPECT_EQ(committed_class, 0UL);
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  size_t used_class = MetaspaceUtils::used_bytes(Metaspace::ClassType);
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  EXPECT_EQ(used_class, 0UL);
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  size_t reserved_class = MetaspaceUtils::reserved_bytes(Metaspace::ClassType);
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  EXPECT_EQ(reserved_class, 0UL);
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}
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static void check_metaspace_stats_are_consistent(const MetaspaceStats& stats) {
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  EXPECT_LE(stats.committed(), stats.reserved());
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  EXPECT_LE(stats.used(), stats.committed());
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}
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static void check_metaspace_stats_are_not_null(const MetaspaceStats& stats) {
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  EXPECT_GT(stats.reserved(), 0UL);
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  EXPECT_GT(stats.committed(), 0UL);
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  EXPECT_GT(stats.used(), 0UL);
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}
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TEST_VM(MetaspaceUtils, get_statistics) {
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  MetaspaceCombinedStats combined_stats = MetaspaceUtils::get_combined_statistics();
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  check_metaspace_stats_are_not_null(combined_stats);
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  check_metaspace_stats_are_consistent(combined_stats);
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  check_metaspace_stats_are_not_null(combined_stats.non_class_space_stats());
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  check_metaspace_stats_are_consistent(combined_stats.non_class_space_stats());
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  if (UseCompressedClassPointers) {
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    check_metaspace_stats_are_not_null(combined_stats.class_space_stats());
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    check_metaspace_stats_are_consistent(combined_stats.class_space_stats());
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  } else {
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    // if we don't have a class space, combined stats should equal non-class stats
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    EXPECT_EQ(combined_stats.non_class_space_stats().reserved(), combined_stats.reserved());
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    EXPECT_EQ(combined_stats.non_class_space_stats().committed(), combined_stats.committed());
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    EXPECT_EQ(combined_stats.non_class_space_stats().used(), combined_stats.used());
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  }
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}
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