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/*
* Copyright (C) 2005 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include <binder/IBinder.h>
#include <binder/RpcAddress.h>
#include <utils/KeyedVector.h>
#include <utils/Mutex.h>
#include <utils/threads.h>
#include <unordered_map>
#include <variant>
// ---------------------------------------------------------------------------
namespace android {
class RpcSession;
class RpcState;
namespace internal {
class Stability;
}
class ProcessState;
using binder_proxy_limit_callback = void(*)(int);
class BpBinder : public IBinder
{
public:
static sp<BpBinder> create(int32_t handle);
static sp<BpBinder> create(const sp<RpcSession>& session, const RpcAddress& address);
/**
* Return value:
* true - this is associated with a socket RpcSession
* false - (usual) binder over e.g. /dev/binder
*/
bool isRpcBinder() const;
virtual const String16& getInterfaceDescriptor() const;
virtual bool isBinderAlive() const;
virtual status_t pingBinder();
virtual status_t dump(int fd, const Vector<String16>& args);
// NOLINTNEXTLINE(google-default-arguments)
virtual status_t transact( uint32_t code,
const Parcel& data,
Parcel* reply,
uint32_t flags = 0) final;
// NOLINTNEXTLINE(google-default-arguments)
virtual status_t linkToDeath(const sp<DeathRecipient>& recipient,
void* cookie = nullptr,
uint32_t flags = 0);
// NOLINTNEXTLINE(google-default-arguments)
virtual status_t unlinkToDeath( const wp<DeathRecipient>& recipient,
void* cookie = nullptr,
uint32_t flags = 0,
wp<DeathRecipient>* outRecipient = nullptr);
virtual void attachObject( const void* objectID,
void* object,
void* cleanupCookie,
object_cleanup_func func) final;
virtual void* findObject(const void* objectID) const final;
virtual void detachObject(const void* objectID) final;
virtual BpBinder* remoteBinder();
void sendObituary();
static uint32_t getBinderProxyCount(uint32_t uid);
static void getCountByUid(Vector<uint32_t>& uids, Vector<uint32_t>& counts);
static void enableCountByUid();
static void disableCountByUid();
static void setCountByUidEnabled(bool enable);
static void setLimitCallback(binder_proxy_limit_callback cb);
static void setBinderProxyCountWatermarks(int high, int low);
class ObjectManager
{
public:
ObjectManager();
~ObjectManager();
void attach( const void* objectID,
void* object,
void* cleanupCookie,
IBinder::object_cleanup_func func);
void* find(const void* objectID) const;
void detach(const void* objectID);
void kill();
private:
ObjectManager(const ObjectManager&);
ObjectManager& operator=(const ObjectManager&);
struct entry_t
{
void* object;
void* cleanupCookie;
IBinder::object_cleanup_func func;
};
KeyedVector<const void*, entry_t> mObjects;
};
class PrivateAccessorForId {
private:
friend class BpBinder;
friend class ::android::Parcel;
friend class ::android::ProcessState;
friend class ::android::RpcState;
explicit PrivateAccessorForId(const BpBinder* binder) : mBinder(binder) {}
// valid if !isRpcBinder
int32_t binderHandle() const { return mBinder->binderHandle(); }
// valid if isRpcBinder
const RpcAddress& rpcAddress() const { return mBinder->rpcAddress(); }
const sp<RpcSession>& rpcSession() const { return mBinder->rpcSession(); }
const BpBinder* mBinder;
};
const PrivateAccessorForId getPrivateAccessorForId() const {
return PrivateAccessorForId(this);
}
private:
friend PrivateAccessorForId;
friend class sp<BpBinder>;
struct BinderHandle {
int32_t handle;
};
struct RpcHandle {
sp<RpcSession> session;
RpcAddress address;
};
using Handle = std::variant<BinderHandle, RpcHandle>;
int32_t binderHandle() const;
const RpcAddress& rpcAddress() const;
const sp<RpcSession>& rpcSession() const;
explicit BpBinder(Handle&& handle);
BpBinder(BinderHandle&& handle, int32_t trackedUid);
explicit BpBinder(RpcHandle&& handle);
virtual ~BpBinder();
virtual void onFirstRef();
virtual void onLastStrongRef(const void* id);
virtual bool onIncStrongAttempted(uint32_t flags, const void* id);
friend ::android::internal::Stability;
int32_t mStability;
Handle mHandle;
struct Obituary {
wp<DeathRecipient> recipient;
void* cookie;
uint32_t flags;
};
void reportOneDeath(const Obituary& obit);
bool isDescriptorCached() const;
mutable Mutex mLock;
volatile int32_t mAlive;
volatile int32_t mObitsSent;
Vector<Obituary>* mObituaries;
ObjectManager mObjects;
mutable String16 mDescriptorCache;
int32_t mTrackedUid;
static Mutex sTrackingLock;
static std::unordered_map<int32_t,uint32_t> sTrackingMap;
static int sNumTrackedUids;
static std::atomic_bool sCountByUidEnabled;
static binder_proxy_limit_callback sLimitCallback;
static uint32_t sBinderProxyCountHighWatermark;
static uint32_t sBinderProxyCountLowWatermark;
static bool sBinderProxyThrottleCreate;
};
} // namespace android
// ---------------------------------------------------------------------------
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