1 /*

     2  * Copyright (c) 2019, SAP SE. All rights reserved.

     3  * Copyright (c) 2019 Oracle and/or its affiliates. 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 #include "precompiled.hpp"

    26 

    27 #include "memory/allocation.inline.hpp"

    28 #include "memory/metaspace/classLoaderMetaspace.hpp"

    29 #include "memory/metaspace/virtualSpaceList.hpp"

    30 #include "memory/metaspace.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 

    39 

    40 // Test the cheerful multitude of metaspace-contains-functions.

    41 class MetaspaceIsMetaspaceObjTest {

    42   Mutex* _lock;

    43   ClassLoaderMetaspace* _ms;

    44 

    45 public:

    46 

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

    48   ~MetaspaceIsMetaspaceObjTest() {

    49     delete _ms;

    50     delete _lock;

    51   }

    52 

    53   void do_test(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, 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

    70     const VirtualSpaceList* const vslist =

    71         (mdType == ClassType && Metaspace::using_class_space()) ?

    72          VirtualSpaceList::vslist_class() : VirtualSpaceList::vslist_nonclass();

    73 

    74     ASSERT_TRUE(vslist->contains((MetaWord*)p));

    75 

    76     // A misaligned pointer shall still be recognized by list::contains

    77     ASSERT_TRUE(vslist->contains((MetaWord*)((address)p) + 1));

    78 

    79     // Now for some bogus values

    80     ASSERT_FALSE(MetaspaceObj::is_valid((MetaspaceObj*)NULL));

    81 

    82     // Should exercise various paths in MetaspaceObj::is_valid()

    83     ASSERT_FALSE(MetaspaceObj::is_valid((MetaspaceObj*)1024));

    84     ASSERT_FALSE(MetaspaceObj::is_valid((MetaspaceObj*)8192));

    85 

    86     MetaspaceObj* p_stack = (MetaspaceObj*) &_lock;

    87     ASSERT_FALSE(MetaspaceObj::is_valid(p_stack));

    88 

    89     MetaspaceObj* p_heap = (MetaspaceObj*) os::malloc(41, mtInternal);

    90     ASSERT_FALSE(MetaspaceObj::is_valid(p_heap));

    91     os::free(p_heap);

    92 

    93     // Test Metaspace::contains_xxx

    94     ASSERT_TRUE(Metaspace::contains(p));

    95     ASSERT_TRUE(Metaspace::contains_non_shared(p));

    96 

    97     delete _ms;

    98     _ms = NULL;

    99     delete _lock;

   100     _lock = NULL;

   101   }

   102 

   103 };

   104 

   105 TEST_VM(metaspace, is_metaspace_obj_non_class) {

   106   MetaspaceIsMetaspaceObjTest test;

   107   test.do_test(NonClassType);

   108 }

   109 

   110 TEST_VM(metaspace, is_metaspace_obj_class) {

   111   MetaspaceIsMetaspaceObjTest test;

   112   test.do_test(ClassType);

   113 }

   114