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 NO_THREAD_SAFETY_ANALYSIS 25 REQUIRES(!Roles::uninterruptible_) 26 SHARED_REQUIRES(Locks::mutator_lock_) /* EXCLUSIVE_LOCK_FUNCTION(Monitor::monitor_lock_) */ { 27 ScopedQuickEntrypointChecks sqec(self); 28 if (UNLIKELY(obj == nullptr)) { 29 ThrowNullPointerException("Null reference used for synchronization (monitor-enter)"); 30 return -1; // Failure. 31 } else { 32 if (kIsDebugBuild) { 33 obj = obj->MonitorEnter(self); // May block 34 CHECK(self->HoldsLock(obj)); 35 CHECK(!self->IsExceptionPending()); 36 } else { 37 obj->MonitorEnter(self); // May block 38 } 39 return 0; // Success. 40 // Only possible exception is NPE and is handled before entry 41 } 42 } 43 44 extern "C" int artUnlockObjectFromCode(mirror::Object* obj, Thread* self) 45 NO_THREAD_SAFETY_ANALYSIS 46 REQUIRES(!Roles::uninterruptible_) 47 SHARED_REQUIRES(Locks::mutator_lock_) /* UNLOCK_FUNCTION(Monitor::monitor_lock_) */ { 48 ScopedQuickEntrypointChecks sqec(self); 49 if (UNLIKELY(obj == nullptr)) { 50 ThrowNullPointerException("Null reference used for synchronization (monitor-exit)"); 51 return -1; // Failure. 52 } else { 53 // MonitorExit may throw exception. 54 return obj->MonitorExit(self) ? 0 /* Success */ : -1 /* Failure */; 55 } 56 } 57 58 } // namespace art 59
