1 /*
2 * Copyright (c) 2002, 2010, 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
25 #include "precompiled.hpp"
26 #include "gc_implementation/concurrentMarkSweep/cmsLockVerifier.hpp"
27 #include "gc_implementation/concurrentMarkSweep/concurrentMarkSweepThread.hpp"
28 #include "runtime/vmThread.hpp"
29
30 ///////////// Locking verification specific to CMS //////////////
31 // Much like "assert_lock_strong()", except that it relaxes the
32 // assertion somewhat for the parallel GC case, where VM thread
33 // or the CMS thread might hold the lock on behalf of the parallel
34 // threads. The second argument is in support of an extra locking
35 // check for CFL spaces' free list locks.
36 #ifndef PRODUCT
37 void CMSLockVerifier::assert_locked(const Mutex* lock,
38 const Mutex* p_lock1,
39 const Mutex* p_lock2) {
40 if (!Universe::is_fully_initialized()) {
41 return;
42 }
43
44 Thread* myThread = Thread::current();
45
46 if (lock == NULL) { // a "lock-free" structure, e.g. MUT, protected by CMS token
47 assert(p_lock1 == NULL && p_lock2 == NULL, "Unexpected caller error");
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1 /*
2 * Copyright (c) 2002, 2015, 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
25 #include "precompiled.hpp"
26 #include "gc/cms/cmsLockVerifier.hpp"
27 #include "gc/cms/concurrentMarkSweepThread.hpp"
28 #include "runtime/vmThread.hpp"
29
30 ///////////// Locking verification specific to CMS //////////////
31 // Much like "assert_lock_strong()", except that it relaxes the
32 // assertion somewhat for the parallel GC case, where VM thread
33 // or the CMS thread might hold the lock on behalf of the parallel
34 // threads. The second argument is in support of an extra locking
35 // check for CFL spaces' free list locks.
36 #ifndef PRODUCT
37 void CMSLockVerifier::assert_locked(const Mutex* lock,
38 const Mutex* p_lock1,
39 const Mutex* p_lock2) {
40 if (!Universe::is_fully_initialized()) {
41 return;
42 }
43
44 Thread* myThread = Thread::current();
45
46 if (lock == NULL) { // a "lock-free" structure, e.g. MUT, protected by CMS token
47 assert(p_lock1 == NULL && p_lock2 == NULL, "Unexpected caller error");
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