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/mutexLocker.inline.hpp"
  29 #include "runtime/os.hpp"
  30 #include "unittest.hpp"
  31 
  32 using namespace metaspace;
  33 
  34 TEST_VM(MetaspaceUtils, reserved) {
  35   size_t reserved = MetaspaceUtils::reserved_bytes();
  36   EXPECT_GT(reserved, 0UL);
  37 
  38   size_t reserved_metadata = MetaspaceUtils::reserved_bytes(Metaspace::NonClassType);
  39   EXPECT_GT(reserved_metadata, 0UL);
  40   EXPECT_LE(reserved_metadata, reserved);
  41 }
  42 
  43 TEST_VM(MetaspaceUtils, reserved_compressed_class_pointers) {
  44   if (!UseCompressedClassPointers) {
  45     return;
  46   }
  47   size_t reserved = MetaspaceUtils::reserved_bytes();
  48   EXPECT_GT(reserved, 0UL);
  49 
  50   size_t reserved_class = MetaspaceUtils::reserved_bytes(Metaspace::ClassType);
  51   EXPECT_GT(reserved_class, 0UL);
  52   EXPECT_LE(reserved_class, reserved);
  53 }
  54 
  55 TEST_VM(MetaspaceUtils, committed) {
  56   size_t committed = MetaspaceUtils::committed_bytes();
  57   EXPECT_GT(committed, 0UL);
  58 
  59   size_t reserved  = MetaspaceUtils::reserved_bytes();
  60   EXPECT_LE(committed, reserved);
  61 
  62   size_t committed_metadata = MetaspaceUtils::committed_bytes(Metaspace::NonClassType);
  63   EXPECT_GT(committed_metadata, 0UL);
  64   EXPECT_LE(committed_metadata, committed);
  65 }
  66 
  67 TEST_VM(MetaspaceUtils, committed_compressed_class_pointers) {
  68   if (!UseCompressedClassPointers) {
  69     return;
  70   }
  71   size_t committed = MetaspaceUtils::committed_bytes();
  72   EXPECT_GT(committed, 0UL);
  73 
  74   size_t committed_class = MetaspaceUtils::committed_bytes(Metaspace::ClassType);
  75   EXPECT_GT(committed_class, 0UL);
  76   EXPECT_LE(committed_class, committed);
  77 }
  78 
  79 TEST_VM(MetaspaceUtils, virtual_space_list_large_chunk) {
  80   VirtualSpaceList* vs_list = new VirtualSpaceList(os::vm_allocation_granularity());
  81   MutexLocker cl(MetaspaceExpand_lock, Mutex::_no_safepoint_check_flag);
  82   // A size larger than VirtualSpaceSize (256k) and add one page to make it _not_ be
  83   // vm_allocation_granularity aligned on Windows.
  84   size_t large_size = (size_t)(2*256*K + (os::vm_page_size() / BytesPerWord));
  85   large_size += (os::vm_page_size() / BytesPerWord);
  86   vs_list->get_new_chunk(large_size, 0);
  87 }