1 /*

     2  * Copyright (c) 2018, 2019, 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 "runtime/mutexLocker.hpp"

    28 #include "runtime/os.hpp"

    29 #include "unittest.hpp"

    30 

    31 using namespace metaspace;

    32 

    33 TEST_VM(MetaspaceUtils, reserved) {

    34   size_t reserved = MetaspaceUtils::reserved_bytes();

    35   EXPECT_GT(reserved, 0UL);

    36 

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

    38   EXPECT_GT(reserved_metadata, 0UL);

    39   EXPECT_LE(reserved_metadata, reserved);

    40 }

    41 

    42 TEST_VM(MetaspaceUtils, reserved_compressed_class_pointers) {

    43   if (!UseCompressedClassPointers) {

    44     return;

    45   }

    46   size_t reserved = MetaspaceUtils::reserved_bytes();

    47   EXPECT_GT(reserved, 0UL);

    48 

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

    50   EXPECT_GT(reserved_class, 0UL);

    51   EXPECT_LE(reserved_class, reserved);

    52 }

    53 

    54 TEST_VM(MetaspaceUtils, committed) {

    55   size_t committed = MetaspaceUtils::committed_bytes();

    56   EXPECT_GT(committed, 0UL);

    57 

    58   size_t reserved  = MetaspaceUtils::reserved_bytes();

    59   EXPECT_LE(committed, reserved);

    60 

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

    62   EXPECT_GT(committed_metadata, 0UL);

    63   EXPECT_LE(committed_metadata, committed);

    64 }

    65 

    66 TEST_VM(MetaspaceUtils, committed_compressed_class_pointers) {

    67   if (!UseCompressedClassPointers) {

    68     return;

    69   }

    70   size_t committed = MetaspaceUtils::committed_bytes();

    71   EXPECT_GT(committed, 0UL);

    72 

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

    74   EXPECT_GT(committed_class, 0UL);

    75   EXPECT_LE(committed_class, committed);

    76 }

    77 

    78 TEST_VM(MetaspaceUtils, virtual_space_list_large_chunk) {

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

    80   MutexLocker cl(MetaspaceExpand_lock, Mutex::_no_safepoint_check_flag);

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

    82   // vm_allocation_granularity aligned on Windows.

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

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

    85   vs_list->get_new_chunk(large_size, 0);

    86 }