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 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 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
