1 /*
2  * Copyright (C) 2012 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #include "callee_save_frame.h"
18 #include "common_throws.h"
19 #include "mirror/object-inl.h"
20 
21 namespace art {
22 
artLockObjectFromCode(mirror::Object * obj,Thread * self)23 extern "C" int artLockObjectFromCode(mirror::Object* obj, Thread* self)
24     SHARED_LOCKS_REQUIRED(Locks::mutator_lock_)
25     NO_THREAD_SAFETY_ANALYSIS /* EXCLUSIVE_LOCK_FUNCTION(Monitor::monitor_lock_) */ {
26   ScopedQuickEntrypointChecks sqec(self);
27   if (UNLIKELY(obj == nullptr)) {
28     ThrowNullPointerException("Null reference used for synchronization (monitor-enter)");
29     return -1;  // Failure.
30   } else {
31     if (kIsDebugBuild) {
32       obj = obj->MonitorEnter(self);  // May block
33       CHECK(self->HoldsLock(obj));
34       CHECK(!self->IsExceptionPending());
35     } else {
36       obj->MonitorEnter(self);  // May block
37     }
38     return 0;  // Success.
39     // Only possible exception is NPE and is handled before entry
40   }
41 }
42 
artUnlockObjectFromCode(mirror::Object * obj,Thread * self)43 extern "C" int artUnlockObjectFromCode(mirror::Object* obj, Thread* self)
44     SHARED_LOCKS_REQUIRED(Locks::mutator_lock_)
45     NO_THREAD_SAFETY_ANALYSIS /* UNLOCK_FUNCTION(Monitor::monitor_lock_) */ {
46   ScopedQuickEntrypointChecks sqec(self);
47   if (UNLIKELY(obj == nullptr)) {
48     ThrowNullPointerException("Null reference used for synchronization (monitor-exit)");
49     return -1;  // Failure.
50   } else {
51     // MonitorExit may throw exception.
52     return obj->MonitorExit(self) ? 0 /* Success */ : -1 /* Failure */;
53   }
54 }
55 
56 }  // namespace art
57