1 /*
2 * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2020 SAP SE. All rights reserved.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #include "precompiled.hpp"
27 #include "memory/allocation.inline.hpp"
28 #include "memory/classLoaderMetaspace.hpp"
29 #include "memory/metaspace.hpp"
30 #include "memory/metaspace/virtualSpaceList.hpp"
31 #include "runtime/mutex.hpp"
32 #include "runtime/mutexLocker.hpp"
33 #include "runtime/os.hpp"
34 #include "unittest.hpp"
35
36 using namespace metaspace;
37
38 // Test the cheerful multitude of metaspace-contains-functions.
39 class MetaspaceIsMetaspaceObjTest {
40 Mutex* _lock;
41 ClassLoaderMetaspace* _ms;
42
43 public:
44
MetaspaceIsMetaspaceObjTest()45 MetaspaceIsMetaspaceObjTest() : _lock(NULL), _ms(NULL) {}
~MetaspaceIsMetaspaceObjTest()46 ~MetaspaceIsMetaspaceObjTest() {
47 delete _ms;
48 delete _lock;
49 }
50
do_test(Metaspace::MetadataType mdType)51 void do_test(Metaspace::MetadataType mdType) {
52 _lock = new Mutex(Monitor::native, "gtest-IsMetaspaceObjTest-lock", false, Monitor::_safepoint_check_never);
53 {
54 MutexLocker ml(_lock, Mutex::_no_safepoint_check_flag);
55 _ms = new ClassLoaderMetaspace(_lock, Metaspace::StandardMetaspaceType);
56 }
57
58 const MetaspaceObj* p = (MetaspaceObj*) _ms->allocate(42, mdType);
59
60 // Test MetaspaceObj::is_metaspace_object
61 ASSERT_TRUE(MetaspaceObj::is_valid(p));
62
63 // A misaligned object shall not be recognized
64 const MetaspaceObj* p_misaligned = (MetaspaceObj*)((address)p) + 1;
65 ASSERT_FALSE(MetaspaceObj::is_valid(p_misaligned));
66
67 // Test VirtualSpaceList::contains
68 const VirtualSpaceList* const vslist =
69 (mdType == Metaspace::ClassType && Metaspace::using_class_space()) ?
70 VirtualSpaceList::vslist_class() : VirtualSpaceList::vslist_nonclass();
71
72 ASSERT_TRUE(vslist->contains((MetaWord*)p));
73
74 // A misaligned pointer shall still be recognized by list::contains
75 ASSERT_TRUE(vslist->contains((MetaWord*)((address)p) + 1));
76
77 // Now for some bogus values
78 ASSERT_FALSE(MetaspaceObj::is_valid((MetaspaceObj*)NULL));
79
80 // Should exercise various paths in MetaspaceObj::is_valid()
81 ASSERT_FALSE(MetaspaceObj::is_valid((MetaspaceObj*)1024));
82 ASSERT_FALSE(MetaspaceObj::is_valid((MetaspaceObj*)8192));
83
84 MetaspaceObj* p_stack = (MetaspaceObj*) &_lock;
85 ASSERT_FALSE(MetaspaceObj::is_valid(p_stack));
86
87 MetaspaceObj* p_heap = (MetaspaceObj*) os::malloc(41, mtInternal);
88 ASSERT_FALSE(MetaspaceObj::is_valid(p_heap));
89 os::free(p_heap);
90
91 // Test Metaspace::contains_xxx
92 ASSERT_TRUE(Metaspace::contains(p));
93 ASSERT_TRUE(Metaspace::contains_non_shared(p));
94
95 delete _ms;
96 _ms = NULL;
97 delete _lock;
98 _lock = NULL;
99 }
100
101 };
102
TEST_VM(metaspace,is_metaspace_obj_non_class)103 TEST_VM(metaspace, is_metaspace_obj_non_class) {
104 MetaspaceIsMetaspaceObjTest test;
105 test.do_test(Metaspace::NonClassType);
106 }
107
TEST_VM(metaspace,is_metaspace_obj_class)108 TEST_VM(metaspace, is_metaspace_obj_class) {
109 MetaspaceIsMetaspaceObjTest test;
110 test.do_test(Metaspace::ClassType);
111 }
112
113