1 /* 2 * Copyright (C) 2005 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 ANDROID_BPBINDER_H 18 #define ANDROID_BPBINDER_H 19 20 #include <binder/IBinder.h> 21 #include <utils/KeyedVector.h> 22 #include <utils/Mutex.h> 23 #include <utils/threads.h> 24 25 #include <unordered_map> 26 27 // --------------------------------------------------------------------------- 28 namespace android { 29 30 using binder_proxy_limit_callback = void(*)(int); 31 32 class BpBinder : public IBinder 33 { 34 public: 35 static BpBinder* create(int32_t handle); 36 37 inline int32_t handle() const { return mHandle; } 38 39 virtual const String16& getInterfaceDescriptor() const; 40 virtual bool isBinderAlive() const; 41 virtual status_t pingBinder(); 42 virtual status_t dump(int fd, const Vector<String16>& args); 43 44 virtual status_t transact( uint32_t code, 45 const Parcel& data, 46 Parcel* reply, 47 uint32_t flags = 0); 48 49 virtual status_t linkToDeath(const sp<DeathRecipient>& recipient, 50 void* cookie = NULL, 51 uint32_t flags = 0); 52 virtual status_t unlinkToDeath( const wp<DeathRecipient>& recipient, 53 void* cookie = NULL, 54 uint32_t flags = 0, 55 wp<DeathRecipient>* outRecipient = NULL); 56 57 virtual void attachObject( const void* objectID, 58 void* object, 59 void* cleanupCookie, 60 object_cleanup_func func); 61 virtual void* findObject(const void* objectID) const; 62 virtual void detachObject(const void* objectID); 63 64 virtual BpBinder* remoteBinder(); 65 66 status_t setConstantData(const void* data, size_t size); 67 void sendObituary(); 68 69 static uint32_t getBinderProxyCount(uint32_t uid); 70 static void getCountByUid(Vector<uint32_t>& uids, Vector<uint32_t>& counts); 71 static void enableCountByUid(); 72 static void disableCountByUid(); 73 static void setCountByUidEnabled(bool enable); 74 static void setLimitCallback(binder_proxy_limit_callback cb); 75 static void setBinderProxyCountWatermarks(int high, int low); 76 77 class ObjectManager 78 { 79 public: 80 ObjectManager(); 81 ~ObjectManager(); 82 83 void attach( const void* objectID, 84 void* object, 85 void* cleanupCookie, 86 IBinder::object_cleanup_func func); 87 void* find(const void* objectID) const; 88 void detach(const void* objectID); 89 90 void kill(); 91 92 private: 93 ObjectManager(const ObjectManager&); 94 ObjectManager& operator=(const ObjectManager&); 95 96 struct entry_t 97 { 98 void* object; 99 void* cleanupCookie; 100 IBinder::object_cleanup_func func; 101 }; 102 103 KeyedVector<const void*, entry_t> mObjects; 104 }; 105 106 protected: 107 BpBinder(int32_t handle,int32_t trackedUid); 108 virtual ~BpBinder(); 109 virtual void onFirstRef(); 110 virtual void onLastStrongRef(const void* id); 111 virtual bool onIncStrongAttempted(uint32_t flags, const void* id); 112 113 private: 114 const int32_t mHandle; 115 116 struct Obituary { 117 wp<DeathRecipient> recipient; 118 void* cookie; 119 uint32_t flags; 120 }; 121 122 void reportOneDeath(const Obituary& obit); 123 bool isDescriptorCached() const; 124 125 mutable Mutex mLock; 126 volatile int32_t mAlive; 127 volatile int32_t mObitsSent; 128 Vector<Obituary>* mObituaries; 129 ObjectManager mObjects; 130 Parcel* mConstantData; 131 mutable String16 mDescriptorCache; 132 int32_t mTrackedUid; 133 134 static Mutex sTrackingLock; 135 static std::unordered_map<int32_t,uint32_t> sTrackingMap; 136 static int sNumTrackedUids; 137 static std::atomic_bool sCountByUidEnabled; 138 static binder_proxy_limit_callback sLimitCallback; 139 static uint32_t sBinderProxyCountHighWatermark; 140 static uint32_t sBinderProxyCountLowWatermark; 141 static bool sBinderProxyThrottleCreate; 142 }; 143 144 }; // namespace android 145 146 // --------------------------------------------------------------------------- 147 148 #endif // ANDROID_BPBINDER_H 149
