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/*
* Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
#include "precompiled.hpp"
#include "memory/allocation.inline.hpp"
#include "memory/metaspace.hpp"
#include "memory/metaspace/virtualSpaceList.hpp"
#include "runtime/mutex.hpp"
#include "runtime/mutexLocker.hpp"
#include "runtime/os.hpp"
#include "unittest.hpp"
using namespace metaspace;
// Test the cheerful multitude of metaspace-contains-functions.
class MetaspaceIsMetaspaceObjTest : public ::testing::Test {
Mutex* _lock;
ClassLoaderMetaspace* _ms;
public:
MetaspaceIsMetaspaceObjTest() : _lock(NULL), _ms(NULL) {}
virtual void SetUp() {
}
virtual void TearDown() {
delete _ms;
delete _lock;
}
void do_test(Metaspace::MetadataType mdType) {
_lock = new Mutex(Monitor::native, "gtest-IsMetaspaceObjTest-lock", false, Monitor::_safepoint_check_never);
{
MutexLockerEx ml(_lock, Mutex::_no_safepoint_check_flag);
_ms = new ClassLoaderMetaspace(_lock, Metaspace::StandardMetaspaceType);
}
const MetaspaceObj* p = (MetaspaceObj*) _ms->allocate(42, mdType);
// Test MetaspaceObj::is_metaspace_object
ASSERT_TRUE(MetaspaceObj::is_valid(p));
// A misaligned object shall not be recognized
const MetaspaceObj* p_misaligned = (MetaspaceObj*)((address)p) + 1;
ASSERT_FALSE(MetaspaceObj::is_valid(p_misaligned));
// Test VirtualSpaceList::contains and find_enclosing_space
VirtualSpaceList* list = Metaspace::space_list();
if (mdType == Metaspace::ClassType && Metaspace::using_class_space()) {
list = Metaspace::class_space_list();
}
ASSERT_TRUE(list->contains(p));
VirtualSpaceNode* const n = list->find_enclosing_space(p);
ASSERT_TRUE(n != NULL);
ASSERT_TRUE(n->contains(p));
// A misaligned pointer shall be recognized by list::contains
ASSERT_TRUE(list->contains((address)p) + 1);
// Now for some bogus values
ASSERT_FALSE(MetaspaceObj::is_valid((MetaspaceObj*)NULL));
// Should exercise various paths in MetaspaceObj::is_valid()
ASSERT_FALSE(MetaspaceObj::is_valid((MetaspaceObj*)1024));
ASSERT_FALSE(MetaspaceObj::is_valid((MetaspaceObj*)8192));
MetaspaceObj* p_stack = (MetaspaceObj*) &_lock;
ASSERT_FALSE(MetaspaceObj::is_valid(p_stack));
MetaspaceObj* p_heap = (MetaspaceObj*) os::malloc(41, mtInternal);
ASSERT_FALSE(MetaspaceObj::is_valid(p_heap));
os::free(p_heap);
// Test Metaspace::contains_xxx
ASSERT_TRUE(Metaspace::contains(p));
ASSERT_TRUE(Metaspace::contains_non_shared(p));
delete _ms;
_ms = NULL;
delete _lock;
_lock = NULL;
}
};
TEST_VM_F(MetaspaceIsMetaspaceObjTest, non_class_space) {
do_test(Metaspace::NonClassType);
}
TEST_VM_F(MetaspaceIsMetaspaceObjTest, class_space) {
do_test(Metaspace::ClassType);
}
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