1 /*
2 * Copyright (c) 2016, 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/allocation.inline.hpp"
26 #include "memory/metaspace.hpp"
27 #include "memory/metaspace/virtualSpaceList.hpp"
28 #include "runtime/mutex.hpp"
29 #include "runtime/mutexLocker.hpp"
30 #include "runtime/os.hpp"
31 #include "unittest.hpp"
32
33 using namespace metaspace;
34
35
36 // Test the cheerful multitude of metaspace-contains-functions.
37 class MetaspaceIsMetaspaceObjTest : public ::testing::Test {
38 Mutex* _lock;
39 ClassLoaderMetaspace* _ms;
40
41 public:
42
MetaspaceIsMetaspaceObjTest()43 MetaspaceIsMetaspaceObjTest() : _lock(NULL), _ms(NULL) {}
44
SetUp()45 virtual void SetUp() {
46 }
47
TearDown()48 virtual void TearDown() {
49 delete _ms;
50 delete _lock;
51 }
52
do_test(Metaspace::MetadataType mdType)53 void do_test(Metaspace::MetadataType mdType) {
54 _lock = new Mutex(Monitor::native, "gtest-IsMetaspaceObjTest-lock", false, Monitor::_safepoint_check_never);
55 {
56 MutexLockerEx ml(_lock, Mutex::_no_safepoint_check_flag);
57 _ms = new ClassLoaderMetaspace(_lock, Metaspace::StandardMetaspaceType);
58 }
59
60 const MetaspaceObj* p = (MetaspaceObj*) _ms->allocate(42, mdType);
61
62 // Test MetaspaceObj::is_metaspace_object
63 ASSERT_TRUE(MetaspaceObj::is_valid(p));
64
65 // A misaligned object shall not be recognized
66 const MetaspaceObj* p_misaligned = (MetaspaceObj*)((address)p) + 1;
67 ASSERT_FALSE(MetaspaceObj::is_valid(p_misaligned));
68
69 // Test VirtualSpaceList::contains and find_enclosing_space
70 VirtualSpaceList* list = Metaspace::space_list();
71 if (mdType == Metaspace::ClassType && Metaspace::using_class_space()) {
72 list = Metaspace::class_space_list();
73 }
74 ASSERT_TRUE(list->contains(p));
75 VirtualSpaceNode* const n = list->find_enclosing_space(p);
76 ASSERT_TRUE(n != NULL);
77 ASSERT_TRUE(n->contains(p));
78
79 // A misaligned pointer shall be recognized by list::contains
80 ASSERT_TRUE(list->contains((address)p) + 1);
81
82 // Now for some bogus values
83 ASSERT_FALSE(MetaspaceObj::is_valid((MetaspaceObj*)NULL));
84
85 // Should exercise various paths in MetaspaceObj::is_valid()
86 ASSERT_FALSE(MetaspaceObj::is_valid((MetaspaceObj*)1024));
87 ASSERT_FALSE(MetaspaceObj::is_valid((MetaspaceObj*)8192));
88
89 MetaspaceObj* p_stack = (MetaspaceObj*) &_lock;
90 ASSERT_FALSE(MetaspaceObj::is_valid(p_stack));
91
92 MetaspaceObj* p_heap = (MetaspaceObj*) os::malloc(41, mtInternal);
93 ASSERT_FALSE(MetaspaceObj::is_valid(p_heap));
94 os::free(p_heap);
95
96 // Test Metaspace::contains_xxx
97 ASSERT_TRUE(Metaspace::contains(p));
98 ASSERT_TRUE(Metaspace::contains_non_shared(p));
99
100 delete _ms;
101 _ms = NULL;
102 delete _lock;
103 _lock = NULL;
104 }
105
106 };
107
TEST_VM_F(MetaspaceIsMetaspaceObjTest,non_class_space)108 TEST_VM_F(MetaspaceIsMetaspaceObjTest, non_class_space) {
109 do_test(Metaspace::NonClassType);
110 }
111
TEST_VM_F(MetaspaceIsMetaspaceObjTest,class_space)112 TEST_VM_F(MetaspaceIsMetaspaceObjTest, class_space) {
113 do_test(Metaspace::ClassType);
114 }
115
116