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 21namespace art { 22 23extern "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 43extern "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