1 /*
 2  * Copyright (c) 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 
25 #include "precompiled.hpp"
26 #include "code/codeBehaviours.hpp"
27 #include "runtime/mutexLocker.hpp"
28 #include "runtime/safepoint.hpp"
29 
30 CompiledICProtectionBehaviour* CompiledICProtectionBehaviour::_current = NULL;
31 
32 bool DefaultICProtectionBehaviour::lock(CompiledMethod* method) {
33   if (CompiledIC_lock->owned_by_self()) {
34     return false;
35   }
36   CompiledIC_lock->lock();
37   return true;
38 }
39 
40 void DefaultICProtectionBehaviour::unlock(CompiledMethod* method) {
41   CompiledIC_lock->unlock();
42 }
43 
44 bool DefaultICProtectionBehaviour::is_safe(CompiledMethod* method) {
45   return SafepointSynchronize::is_at_safepoint() || CompiledIC_lock->owned_by_self();
46 }