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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 <utils/KeyedVector.h>
#include <utils/String8.h>
#include <utils/String16.h>
#include <utils/threads.h>
#include <pthread.h>
// ---------------------------------------------------------------------------
namespace android {
class IPCThreadState;
class ProcessState : public virtual RefBase
{
public:
static sp<ProcessState> self();
static sp<ProcessState> selfOrNull();
/* initWithDriver() can be used to configure libbinder to use
* a different binder driver dev node. It must be called *before*
* any call to ProcessState::self(). The default is /dev/vndbinder
* for processes built with the VNDK and /dev/binder for those
* which are not.
*
* If this is called with nullptr, the behavior is the same as selfOrNull.
*/
static sp<ProcessState> initWithDriver(const char *driver);
sp<IBinder> getContextObject(const sp<IBinder>& caller);
void startThreadPool();
bool becomeContextManager();
sp<IBinder> getStrongProxyForHandle(int32_t handle);
void expungeHandle(int32_t handle, IBinder* binder);
void spawnPooledThread(bool isMain);
status_t setThreadPoolMaxThreadCount(size_t maxThreads);
status_t enableOnewaySpamDetection(bool enable);
void giveThreadPoolName();
String8 getDriverName();
ssize_t getKernelReferences(size_t count, uintptr_t* buf);
// Only usable by the context manager.
// This refcount includes:
// 1. Strong references to the node by this and other processes
// 2. Temporary strong references held by the kernel during a
// transaction on the node.
// It does NOT include local strong references to the node
ssize_t getStrongRefCountForNode(const sp<BpBinder>& binder);
enum class CallRestriction {
// all calls okay
NONE,
// log when calls are blocking
ERROR_IF_NOT_ONEWAY,
// abort process on blocking calls
FATAL_IF_NOT_ONEWAY,
};
// Sets calling restrictions for all transactions in this process. This must be called
// before any threads are spawned.
void setCallRestriction(CallRestriction restriction);
private:
static sp<ProcessState> init(const char *defaultDriver, bool requireDefault);
friend class IPCThreadState;
friend class sp<ProcessState>;
explicit ProcessState(const char* driver);
~ProcessState();
ProcessState(const ProcessState& o);
ProcessState& operator=(const ProcessState& o);
String8 makeBinderThreadName();
struct handle_entry {
IBinder* binder;
RefBase::weakref_type* refs;
};
handle_entry* lookupHandleLocked(int32_t handle);
String8 mDriverName;
int mDriverFD;
void* mVMStart;
// Protects thread count and wait variables below.
pthread_mutex_t mThreadCountLock;
// Broadcast whenever mWaitingForThreads > 0
pthread_cond_t mThreadCountDecrement;
// Number of binder threads current executing a command.
size_t mExecutingThreadsCount;
// Number of threads calling IPCThreadState::blockUntilThreadAvailable()
size_t mWaitingForThreads;
// Maximum number for binder threads allowed for this process.
size_t mMaxThreads;
// Time when thread pool was emptied
int64_t mStarvationStartTimeMs;
mutable Mutex mLock; // protects everything below.
Vector<handle_entry>mHandleToObject;
bool mThreadPoolStarted;
volatile int32_t mThreadPoolSeq;
CallRestriction mCallRestriction;
};
} // namespace android
// ---------------------------------------------------------------------------
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