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 }