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135 lines
5.1 KiB
135 lines
5.1 KiB
4 months ago
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/*
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* Copyright (C) 2005 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ANDROID_HARDWARE_PROCESS_STATE_H
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#define ANDROID_HARDWARE_PROCESS_STATE_H
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#include <hwbinder/IBinder.h>
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#include <utils/KeyedVector.h>
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#include <utils/String8.h>
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#include <utils/String16.h>
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#include <utils/threads.h>
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#include <pthread.h>
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// WARNING: this code is part of libhwbinder, a fork of libbinder. Generally,
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// this means that it is only relevant to HIDL. Any AIDL- or libbinder-specific
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// code should not try to use these things.
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// ---------------------------------------------------------------------------
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namespace android {
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namespace hardware {
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class IPCThreadState;
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class ProcessState : public virtual RefBase
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{
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public:
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static sp<ProcessState> self();
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static sp<ProcessState> selfOrNull();
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// Note: don't call self() or selfOrNull() before initWithMmapSize()
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// with '0' as an argument, this is the same as selfOrNull
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static sp<ProcessState> initWithMmapSize(size_t mmapSize); // size in bytes
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void startThreadPool();
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sp<IBinder> getContextObject(const sp<IBinder>& /*caller*/);
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// only call once, without creating a pool
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void becomeContextManager();
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sp<IBinder> getStrongProxyForHandle(int32_t handle);
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wp<IBinder> getWeakProxyForHandle(int32_t handle);
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void expungeHandle(int32_t handle, IBinder* binder);
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void spawnPooledThread(bool isMain);
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status_t setThreadPoolConfiguration(size_t maxThreads, bool callerJoinsPool);
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status_t enableOnewaySpamDetection(bool enable);
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size_t getMaxThreads();
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void giveThreadPoolName();
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ssize_t getKernelReferences(size_t count, uintptr_t* buf);
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// This refcount includes:
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// 1. Strong references to the node by this and other processes
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// 2. Temporary strong references held by the kernel during a
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// transaction on the node.
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// It does NOT include local strong references to the node
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ssize_t getStrongRefCountForNodeByHandle(int32_t handle);
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size_t getMmapSize();
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enum class CallRestriction {
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// all calls okay
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NONE,
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// log when calls are blocking
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ERROR_IF_NOT_ONEWAY,
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// abort process on blocking calls
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FATAL_IF_NOT_ONEWAY,
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};
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// Sets calling restrictions for all transactions in this process. This must be called
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// before any threads are spawned.
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void setCallRestriction(CallRestriction restriction);
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private:
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static sp<ProcessState> init(size_t mmapSize, bool requireMmapSize);
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friend class IPCThreadState;
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explicit ProcessState(size_t mmapSize);
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~ProcessState();
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ProcessState(const ProcessState& o);
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ProcessState& operator=(const ProcessState& o);
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String8 makeBinderThreadName();
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struct handle_entry {
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IBinder* binder;
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RefBase::weakref_type* refs;
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};
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handle_entry* lookupHandleLocked(int32_t handle);
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int mDriverFD;
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void* mVMStart;
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// Protects thread count variable below.
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pthread_mutex_t mThreadCountLock;
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// Number of binder threads current executing a command.
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size_t mExecutingThreadsCount;
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// Maximum number for binder threads allowed for this process.
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size_t mMaxThreads;
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// Time when thread pool was emptied
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int64_t mStarvationStartTimeMs;
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mutable Mutex mLock; // protects everything below.
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Vector<handle_entry>mHandleToObject;
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String8 mRootDir;
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bool mThreadPoolStarted;
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bool mSpawnThreadOnStart;
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volatile int32_t mThreadPoolSeq;
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const size_t mMmapSize;
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CallRestriction mCallRestriction;
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};
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} // namespace hardware
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} // namespace android
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// ---------------------------------------------------------------------------
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#endif // ANDROID_HARDWARE_PROCESS_STATE_H
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