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 

    43   MetaspaceIsMetaspaceObjTest() : _lock(NULL), _ms(NULL) {}

    44 

    45   virtual void SetUp() {

    46   }

    47 

    48   virtual void TearDown() {

    49     delete _ms;

    50     delete _lock;

    51   }

    52 

    53   void do_test(Metaspace::MetadataType mdType) {

    54     _lock = new Mutex(Monitor::native, "gtest-IsMetaspaceObjTest-lock", false, Monitor::_safepoint_check_never);

    55     {

    56       MutexLocker 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 

   108 TEST_VM_F(MetaspaceIsMetaspaceObjTest, non_class_space) {

   109   do_test(Metaspace::NonClassType);

   110 }

   111 

   112 TEST_VM_F(MetaspaceIsMetaspaceObjTest, class_space) {

   113   do_test(Metaspace::ClassType);

   114 }

   115