1 /* 2 * Copyright (C) 2016 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 #ifndef ART_RUNTIME_OBJ_PTR_INL_H_ 18 #define ART_RUNTIME_OBJ_PTR_INL_H_ 19 20 #include "base/bit_utils.h" 21 #include "obj_ptr.h" 22 #include "thread-current-inl.h" 23 24 namespace art { 25 26 template<class MirrorType> 27 inline bool ObjPtr<MirrorType>::IsValid() const { 28 if (!kObjPtrPoisoning || IsNull()) { 29 return true; 30 } 31 return GetCookie() == TrimCookie(Thread::Current()->GetPoisonObjectCookie()); 32 } 33 34 template<class MirrorType> 35 inline void ObjPtr<MirrorType>::AssertValid() const { 36 if (kObjPtrPoisoning) { 37 CHECK(IsValid()) << "Stale object pointer " << PtrUnchecked() << " , expected cookie " 38 << TrimCookie(Thread::Current()->GetPoisonObjectCookie()) << " but got " << GetCookie(); 39 } 40 } 41 42 template<class MirrorType> 43 inline uintptr_t ObjPtr<MirrorType>::Encode(MirrorType* ptr) { 44 uintptr_t ref = reinterpret_cast<uintptr_t>(ptr); 45 DCHECK_ALIGNED(ref, kObjectAlignment); 46 if (kObjPtrPoisoning && ref != 0) { 47 DCHECK_LE(ref, 0xFFFFFFFFU); 48 ref >>= kObjectAlignmentShift; 49 // Put cookie in high bits. 50 Thread* self = Thread::Current(); 51 DCHECK(self != nullptr); 52 ref |= self->GetPoisonObjectCookie() << kCookieShift; 53 } 54 return ref; 55 } 56 57 template<class MirrorType> 58 inline std::ostream& operator<<(std::ostream& os, ObjPtr<MirrorType> ptr) { 59 // May be used for dumping bad pointers, do not use the checked version. 60 return os << ptr.PtrUnchecked(); 61 } 62 63 } // namespace art 64 65 #endif // ART_RUNTIME_OBJ_PTR_INL_H_ 66
