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,StackReference<mirror::ArtMethod> * sp)23 extern "C" int artLockObjectFromCode(mirror::Object* obj, Thread* self,
24 StackReference<mirror::ArtMethod>* sp)
25 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_)
26 NO_THREAD_SAFETY_ANALYSIS /* EXCLUSIVE_LOCK_FUNCTION(Monitor::monitor_lock_) */ {
27 FinishCalleeSaveFrameSetup(self, sp, Runtime::kRefsOnly);
28 if (UNLIKELY(obj == NULL)) {
29 ThrowLocation throw_location(self->GetCurrentLocationForThrow());
30 ThrowNullPointerException(&throw_location,
31 "Null reference used for synchronization (monitor-enter)");
32 return -1; // Failure.
33 } else {
34 if (kIsDebugBuild) {
35 obj = obj->MonitorEnter(self); // May block
36 CHECK(self->HoldsLock(obj));
37 CHECK(!self->IsExceptionPending());
38 } else {
39 obj->MonitorEnter(self); // May block
40 }
41 return 0; // Success.
42 // Only possible exception is NPE and is handled before entry
43 }
44 }
45
artUnlockObjectFromCode(mirror::Object * obj,Thread * self,StackReference<mirror::ArtMethod> * sp)46 extern "C" int artUnlockObjectFromCode(mirror::Object* obj, Thread* self,
47 StackReference<mirror::ArtMethod>* sp)
48 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_)
49 NO_THREAD_SAFETY_ANALYSIS /* UNLOCK_FUNCTION(Monitor::monitor_lock_) */ {
50 FinishCalleeSaveFrameSetup(self, sp, Runtime::kRefsOnly);
51 if (UNLIKELY(obj == NULL)) {
52 ThrowLocation throw_location(self->GetCurrentLocationForThrow());
53 ThrowNullPointerException(&throw_location,
54 "Null reference used for synchronization (monitor-exit)");
55 return -1; // Failure.
56 } else {
57 // MonitorExit may throw exception.
58 return obj->MonitorExit(self) ? 0 /* Success */ : -1 /* Failure */;
59 }
60 }
61
62 } // namespace art
63