1 /*

     2  * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 

    24 #include "precompiled.hpp"

    25 #include "memory/metaspace.hpp"

    26 #include "memory/metaspace/virtualSpaceList.hpp"

    27 #include "unittest.hpp"

    28 

    29 using namespace metaspace;

    30 

    31 TEST_VM(MetaspaceUtils, reserved) {

    32   size_t reserved = MetaspaceUtils::reserved_bytes();

    33   EXPECT_GT(reserved, 0UL);

    34 

    35   size_t reserved_metadata = MetaspaceUtils::reserved_bytes(Metaspace::NonClassType);

    36   EXPECT_GT(reserved_metadata, 0UL);

    37   EXPECT_LE(reserved_metadata, reserved);

    38 }

    39 

    40 TEST_VM(MetaspaceUtils, reserved_compressed_class_pointers) {

    41   if (!UseCompressedClassPointers) {

    42     return;

    43   }

    44   size_t reserved = MetaspaceUtils::reserved_bytes();

    45   EXPECT_GT(reserved, 0UL);

    46 

    47   size_t reserved_class = MetaspaceUtils::reserved_bytes(Metaspace::ClassType);

    48   EXPECT_GT(reserved_class, 0UL);

    49   EXPECT_LE(reserved_class, reserved);

    50 }

    51 

    52 TEST_VM(MetaspaceUtils, committed) {

    53   size_t committed = MetaspaceUtils::committed_bytes();

    54   EXPECT_GT(committed, 0UL);

    55 

    56   size_t reserved  = MetaspaceUtils::reserved_bytes();

    57   EXPECT_LE(committed, reserved);

    58 

    59   size_t committed_metadata = MetaspaceUtils::committed_bytes(Metaspace::NonClassType);

    60   EXPECT_GT(committed_metadata, 0UL);

    61   EXPECT_LE(committed_metadata, committed);

    62 }

    63 

    64 TEST_VM(MetaspaceUtils, committed_compressed_class_pointers) {

    65   if (!UseCompressedClassPointers) {

    66     return;

    67   }

    68   size_t committed = MetaspaceUtils::committed_bytes();

    69   EXPECT_GT(committed, 0UL);

    70 

    71   size_t committed_class = MetaspaceUtils::committed_bytes(Metaspace::ClassType);

    72   EXPECT_GT(committed_class, 0UL);

    73   EXPECT_LE(committed_class, committed);

    74 }

    75 

    76 TEST_VM(MetaspaceUtils, virtual_space_list_large_chunk) {

    77   VirtualSpaceList* vs_list = new VirtualSpaceList(os::vm_allocation_granularity());

    78   MutexLockerEx cl(MetaspaceExpand_lock, Mutex::_no_safepoint_check_flag);

    79   // A size larger than VirtualSpaceSize (256k) and add one page to make it _not_ be

    80   // vm_allocation_granularity aligned on Windows.

    81   size_t large_size = (size_t)(2*256*K + (os::vm_page_size() / BytesPerWord));

    82   large_size += (os::vm_page_size() / BytesPerWord);

    83   vs_list->get_new_chunk(large_size, 0);

    84 }