ProcessState.cpp revision 67ac00f7689d04bb617cba55b3adefd780391bac
1edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project/* 2edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * Copyright (C) 2005 The Android Open Source Project 3edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * 4edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * Licensed under the Apache License, Version 2.0 (the "License"); 5edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * you may not use this file except in compliance with the License. 6edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * You may obtain a copy of the License at 7edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * 8edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 9edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * 10edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * Unless required by applicable law or agreed to in writing, software 11edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 12edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * See the License for the specific language governing permissions and 14edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * limitations under the License. 15edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project */ 16edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 17edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#define LOG_TAG "ProcessState" 18edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 19c5b2c0bf8007562536b822eb060fc54a01f8e08bMathias Agopian#include <binder/ProcessState.h> 20edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 21edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <utils/Atomic.h> 22c5b2c0bf8007562536b822eb060fc54a01f8e08bMathias Agopian#include <binder/BpBinder.h> 23c5b2c0bf8007562536b822eb060fc54a01f8e08bMathias Agopian#include <binder/IPCThreadState.h> 24edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <utils/Log.h> 25edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <utils/String8.h> 26c5b2c0bf8007562536b822eb060fc54a01f8e08bMathias Agopian#include <binder/IServiceManager.h> 27edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <utils/String8.h> 28edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <utils/threads.h> 29edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 30208059f67ed2dd9fa025e07fcb6954d3cb61c79eMathias Agopian#include <private/binder/binder_module.h> 31208059f67ed2dd9fa025e07fcb6954d3cb61c79eMathias Agopian#include <private/binder/Static.h> 32edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 33edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <errno.h> 34edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <fcntl.h> 35edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <stdio.h> 36edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <stdlib.h> 37edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <unistd.h> 38edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <sys/ioctl.h> 39edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <sys/mman.h> 40edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <sys/stat.h> 41a082fa8a6bd4303d5a5921133746f9e2856ab0d4Philip Cuadra#include <sys/types.h> 42edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 43c0c1092183ceb38dd4d70d2732dd3a743fefd567Rebecca Schultz Zavin#define BINDER_VM_SIZE ((1*1024*1024) - (4096 *2)) 44376b822728c582a9deb26ce339deb5204ae4d22eWale Ogunwale#define DEFAULT_MAX_BINDER_THREADS 15 45edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 46a082fa8a6bd4303d5a5921133746f9e2856ab0d4Philip Cuadra// ------------------------------------------------------------------------- 47edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 48edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectnamespace android { 49376b822728c582a9deb26ce339deb5204ae4d22eWale Ogunwale 50edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectclass PoolThread : public Thread 51edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 52edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectpublic: 53e2347b7953f70232541bdc1b392230d6231aaeb9Chih-Hung Hsieh explicit PoolThread(bool isMain) 54edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project : mIsMain(isMain) 55edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project { 56edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 57edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 58edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectprotected: 59edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project virtual bool threadLoop() 60edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project { 61edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project IPCThreadState::self()->joinThreadPool(mIsMain); 62edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return false; 63edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 64edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 65edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project const bool mIsMain; 66edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project}; 67edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 68edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectsp<ProcessState> ProcessState::self() 69edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 70e8db871de7b26bf4fe7ae8d400c4a2c503cfe3a2Mathias Agopian Mutex::Autolock _l(gProcessMutex); 71e8db871de7b26bf4fe7ae8d400c4a2c503cfe3a2Mathias Agopian if (gProcess != NULL) { 72e8db871de7b26bf4fe7ae8d400c4a2c503cfe3a2Mathias Agopian return gProcess; 73e8db871de7b26bf4fe7ae8d400c4a2c503cfe3a2Mathias Agopian } 74e8db871de7b26bf4fe7ae8d400c4a2c503cfe3a2Mathias Agopian gProcess = new ProcessState; 75edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return gProcess; 76edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 77edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 78edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid ProcessState::setContextObject(const sp<IBinder>& object) 79edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 80edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project setContextObject(object, String16("default")); 81edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 82edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 836f4f3ab36c5ed1df84eb3a9f7475f0ac42952f58Colin Crosssp<IBinder> ProcessState::getContextObject(const sp<IBinder>& /*caller*/) 84edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 85e16986cae281f118ecd563c384b7f6e5a4b937b5Jeff Brown return getStrongProxyForHandle(0); 86edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 87edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 88edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid ProcessState::setContextObject(const sp<IBinder>& object, const String16& name) 89edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 90edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project AutoMutex _l(mLock); 91edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mContexts.add(name, object); 92edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 93edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 94edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectsp<IBinder> ProcessState::getContextObject(const String16& name, const sp<IBinder>& caller) 95edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 96edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mLock.lock(); 97edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project sp<IBinder> object( 98edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mContexts.indexOfKey(name) >= 0 ? mContexts.valueFor(name) : NULL); 99edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mLock.unlock(); 100edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 101edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project //printf("Getting context object %s for %p\n", String8(name).string(), caller.get()); 102edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 103edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (object != NULL) return object; 104edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 105edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Don't attempt to retrieve contexts if we manage them 106edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (mManagesContexts) { 107e6f43ddce78d6846af12550ff9193c5c6fe5844bSteve Block ALOGE("getContextObject(%s) failed, but we manage the contexts!\n", 108edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project String8(name).string()); 109edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return NULL; 110edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 111edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 112edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project IPCThreadState* ipc = IPCThreadState::self(); 113edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project { 114edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project Parcel data, reply; 115edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // no interface token on this magic transaction 116edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project data.writeString16(name); 117edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project data.writeStrongBinder(caller); 118edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project status_t result = ipc->transact(0 /*magic*/, 0, data, &reply, 0); 119edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (result == NO_ERROR) { 120edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project object = reply.readStrongBinder(); 121edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 122edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 123edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 124edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project ipc->flushCommands(); 125edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 126edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (object != NULL) setContextObject(object, name); 127edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return object; 128edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 129edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 130edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid ProcessState::startThreadPool() 131edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 132edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project AutoMutex _l(mLock); 133edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (!mThreadPoolStarted) { 134edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mThreadPoolStarted = true; 135edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project spawnPooledThread(true); 136edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 137edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 138edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 139edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectbool ProcessState::isContextManager(void) const 140edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 141edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return mManagesContexts; 142edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 143edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 144edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectbool ProcessState::becomeContextManager(context_check_func checkFunc, void* userData) 145edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 146edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (!mManagesContexts) { 147edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project AutoMutex _l(mLock); 148edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mBinderContextCheckFunc = checkFunc; 149edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mBinderContextUserData = userData; 150e16986cae281f118ecd563c384b7f6e5a4b937b5Jeff Brown 151e16986cae281f118ecd563c384b7f6e5a4b937b5Jeff Brown int dummy = 0; 152e16986cae281f118ecd563c384b7f6e5a4b937b5Jeff Brown status_t result = ioctl(mDriverFD, BINDER_SET_CONTEXT_MGR, &dummy); 153e16986cae281f118ecd563c384b7f6e5a4b937b5Jeff Brown if (result == 0) { 154edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mManagesContexts = true; 155e16986cae281f118ecd563c384b7f6e5a4b937b5Jeff Brown } else if (result == -1) { 156e16986cae281f118ecd563c384b7f6e5a4b937b5Jeff Brown mBinderContextCheckFunc = NULL; 157e16986cae281f118ecd563c384b7f6e5a4b937b5Jeff Brown mBinderContextUserData = NULL; 158e6f43ddce78d6846af12550ff9193c5c6fe5844bSteve Block ALOGE("Binder ioctl to become context manager failed: %s\n", strerror(errno)); 159edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 160edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 161edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return mManagesContexts; 162edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 163edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 164edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source ProjectProcessState::handle_entry* ProcessState::lookupHandleLocked(int32_t handle) 165edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 166edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project const size_t N=mHandleToObject.size(); 167edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (N <= (size_t)handle) { 168edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project handle_entry e; 169edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project e.binder = NULL; 170edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project e.refs = NULL; 171edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project status_t err = mHandleToObject.insertAt(e, N, handle+1-N); 172edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (err < NO_ERROR) return NULL; 173edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 174edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return &mHandleToObject.editItemAt(handle); 175edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 176edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 177edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectsp<IBinder> ProcessState::getStrongProxyForHandle(int32_t handle) 178edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 179edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project sp<IBinder> result; 180edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 181edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project AutoMutex _l(mLock); 182edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 183edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project handle_entry* e = lookupHandleLocked(handle); 184edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 185edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (e != NULL) { 186edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // We need to create a new BpBinder if there isn't currently one, OR we 187edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // are unable to acquire a weak reference on this current one. See comment 188edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // in getWeakProxyForHandle() for more info about this. 189edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project IBinder* b = e->binder; 190edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (b == NULL || !e->refs->attemptIncWeak(this)) { 191a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor if (handle == 0) { 192a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // Special case for context manager... 193a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // The context manager is the only object for which we create 194a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // a BpBinder proxy without already holding a reference. 195a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // Perform a dummy transaction to ensure the context manager 196a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // is registered before we create the first local reference 197a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // to it (which will occur when creating the BpBinder). 198a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // If a local reference is created for the BpBinder when the 199a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // context manager is not present, the driver will fail to 200a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // provide a reference to the context manager, but the 201a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // driver API does not return status. 202a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // 203a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // Note that this is not race-free if the context manager 204a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // dies while this code runs. 205a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // 206a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // TODO: add a driver API to wait for context manager, or 207a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // stop special casing handle 0 for context manager and add 208a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // a driver API to get a handle to the context manager with 209a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // proper reference counting. 210a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor 211a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor Parcel data; 212a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor status_t status = IPCThreadState::self()->transact( 213a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor 0, IBinder::PING_TRANSACTION, data, NULL, 0); 214a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor if (status == DEAD_OBJECT) 215a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor return NULL; 216a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor } 217a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor 218edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project b = new BpBinder(handle); 219edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project e->binder = b; 220edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (b) e->refs = b->getWeakRefs(); 221edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project result = b; 222edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } else { 223edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // This little bit of nastyness is to allow us to add a primary 224edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // reference to the remote proxy when this team doesn't have one 225edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // but another team is sending the handle to us. 226edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project result.force_set(b); 227edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project e->refs->decWeak(this); 228edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 229edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 230edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 231edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return result; 232edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 233edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 234edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectwp<IBinder> ProcessState::getWeakProxyForHandle(int32_t handle) 235edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 236edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project wp<IBinder> result; 237edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 238edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project AutoMutex _l(mLock); 239edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 240edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project handle_entry* e = lookupHandleLocked(handle); 241edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 242edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (e != NULL) { 243edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // We need to create a new BpBinder if there isn't currently one, OR we 244edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // are unable to acquire a weak reference on this current one. The 245edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // attemptIncWeak() is safe because we know the BpBinder destructor will always 246edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // call expungeHandle(), which acquires the same lock we are holding now. 247edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // We need to do this because there is a race condition between someone 248edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // releasing a reference on this BpBinder, and a new reference on its handle 249edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // arriving from the driver. 250edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project IBinder* b = e->binder; 251edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (b == NULL || !e->refs->attemptIncWeak(this)) { 252edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project b = new BpBinder(handle); 253edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project result = b; 254edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project e->binder = b; 255edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (b) e->refs = b->getWeakRefs(); 256edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } else { 257edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project result = b; 258edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project e->refs->decWeak(this); 259edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 260edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 261edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 262edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return result; 263edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 264edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 265edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid ProcessState::expungeHandle(int32_t handle, IBinder* binder) 266edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 267edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project AutoMutex _l(mLock); 268edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 269edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project handle_entry* e = lookupHandleLocked(handle); 270edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 271edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // This handle may have already been replaced with a new BpBinder 272edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // (if someone failed the AttemptIncWeak() above); we don't want 273edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // to overwrite it. 274edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (e && e->binder == binder) e->binder = NULL; 275edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 276edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 277e3e43b384e0603e5883b501cdb169641fab8fea2Mathias AgopianString8 ProcessState::makeBinderThreadName() { 278e3e43b384e0603e5883b501cdb169641fab8fea2Mathias Agopian int32_t s = android_atomic_add(1, &mThreadPoolSeq); 279a082fa8a6bd4303d5a5921133746f9e2856ab0d4Philip Cuadra pid_t pid = getpid(); 280e3e43b384e0603e5883b501cdb169641fab8fea2Mathias Agopian String8 name; 281a082fa8a6bd4303d5a5921133746f9e2856ab0d4Philip Cuadra name.appendFormat("Binder:%d_%X", pid, s); 282e3e43b384e0603e5883b501cdb169641fab8fea2Mathias Agopian return name; 283e3e43b384e0603e5883b501cdb169641fab8fea2Mathias Agopian} 284e3e43b384e0603e5883b501cdb169641fab8fea2Mathias Agopian 285edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid ProcessState::spawnPooledThread(bool isMain) 286edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 287edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (mThreadPoolStarted) { 288e3e43b384e0603e5883b501cdb169641fab8fea2Mathias Agopian String8 name = makeBinderThreadName(); 289e3e43b384e0603e5883b501cdb169641fab8fea2Mathias Agopian ALOGV("Spawning new pooled thread, name=%s\n", name.string()); 290edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project sp<Thread> t = new PoolThread(isMain); 291e3e43b384e0603e5883b501cdb169641fab8fea2Mathias Agopian t->run(name.string()); 292edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 293edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 294edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 2951b80f793d2328dd94a151411a1cc3a676121ffc7Mathias Agopianstatus_t ProcessState::setThreadPoolMaxThreadCount(size_t maxThreads) { 2961b80f793d2328dd94a151411a1cc3a676121ffc7Mathias Agopian status_t result = NO_ERROR; 297376b822728c582a9deb26ce339deb5204ae4d22eWale Ogunwale if (ioctl(mDriverFD, BINDER_SET_MAX_THREADS, &maxThreads) != -1) { 298376b822728c582a9deb26ce339deb5204ae4d22eWale Ogunwale mMaxThreads = maxThreads; 299376b822728c582a9deb26ce339deb5204ae4d22eWale Ogunwale } else { 3001b80f793d2328dd94a151411a1cc3a676121ffc7Mathias Agopian result = -errno; 3011b80f793d2328dd94a151411a1cc3a676121ffc7Mathias Agopian ALOGE("Binder ioctl to set max threads failed: %s", strerror(-result)); 3021b80f793d2328dd94a151411a1cc3a676121ffc7Mathias Agopian } 3031b80f793d2328dd94a151411a1cc3a676121ffc7Mathias Agopian return result; 3041b80f793d2328dd94a151411a1cc3a676121ffc7Mathias Agopian} 3051b80f793d2328dd94a151411a1cc3a676121ffc7Mathias Agopian 306e3e43b384e0603e5883b501cdb169641fab8fea2Mathias Agopianvoid ProcessState::giveThreadPoolName() { 307e3e43b384e0603e5883b501cdb169641fab8fea2Mathias Agopian androidSetThreadName( makeBinderThreadName().string() ); 308e3e43b384e0603e5883b501cdb169641fab8fea2Mathias Agopian} 309e3e43b384e0603e5883b501cdb169641fab8fea2Mathias Agopian 310edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstatic int open_driver() 311edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 3120fe7ce375ed6c9fcd86b8bb3a836bc37c9740831Nick Kralevich int fd = open("/dev/binder", O_RDWR | O_CLOEXEC); 313edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (fd >= 0) { 31478181df1efee04bb861893714d8b11a24243153fJin Wei int vers = 0; 315edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project status_t result = ioctl(fd, BINDER_VERSION, &vers); 316edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (result == -1) { 317e6f43ddce78d6846af12550ff9193c5c6fe5844bSteve Block ALOGE("Binder ioctl to obtain version failed: %s", strerror(errno)); 318edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project close(fd); 319edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project fd = -1; 320edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 321edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (result != 0 || vers != BINDER_CURRENT_PROTOCOL_VERSION) { 32267ac00f7689d04bb617cba55b3adefd780391bacGreg Hartman ALOGE("Binder driver protocol(%d) does not match user space protocol(%d)! ioctl() return value: %d", 32367ac00f7689d04bb617cba55b3adefd780391bacGreg Hartman vers, BINDER_CURRENT_PROTOCOL_VERSION, result); 324edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project close(fd); 325edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project fd = -1; 326edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 327376b822728c582a9deb26ce339deb5204ae4d22eWale Ogunwale size_t maxThreads = DEFAULT_MAX_BINDER_THREADS; 328edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project result = ioctl(fd, BINDER_SET_MAX_THREADS, &maxThreads); 329edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (result == -1) { 330e6f43ddce78d6846af12550ff9193c5c6fe5844bSteve Block ALOGE("Binder ioctl to set max threads failed: %s", strerror(errno)); 331edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 332edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } else { 33332397c1cd3327905173b36baa6fd1c579bc328ffSteve Block ALOGW("Opening '/dev/binder' failed: %s\n", strerror(errno)); 334edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 335edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return fd; 336edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 337edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 338edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source ProjectProcessState::ProcessState() 339edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project : mDriverFD(open_driver()) 340edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project , mVMStart(MAP_FAILED) 341376b822728c582a9deb26ce339deb5204ae4d22eWale Ogunwale , mThreadCountLock(PTHREAD_MUTEX_INITIALIZER) 342376b822728c582a9deb26ce339deb5204ae4d22eWale Ogunwale , mThreadCountDecrement(PTHREAD_COND_INITIALIZER) 343376b822728c582a9deb26ce339deb5204ae4d22eWale Ogunwale , mExecutingThreadsCount(0) 344376b822728c582a9deb26ce339deb5204ae4d22eWale Ogunwale , mMaxThreads(DEFAULT_MAX_BINDER_THREADS) 34596e8322f4d11af8538d6d0db5f1a11338b8aee9dColin Cross , mStarvationStartTimeMs(0) 346edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project , mManagesContexts(false) 347edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project , mBinderContextCheckFunc(NULL) 348edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project , mBinderContextUserData(NULL) 349edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project , mThreadPoolStarted(false) 350edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project , mThreadPoolSeq(1) 351edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 352edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (mDriverFD >= 0) { 353edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // mmap the binder, providing a chunk of virtual address space to receive transactions. 354edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mVMStart = mmap(0, BINDER_VM_SIZE, PROT_READ, MAP_PRIVATE | MAP_NORESERVE, mDriverFD, 0); 355edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (mVMStart == MAP_FAILED) { 356edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // *sigh* 357e6f43ddce78d6846af12550ff9193c5c6fe5844bSteve Block ALOGE("Using /dev/binder failed: unable to mmap transaction memory.\n"); 358edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project close(mDriverFD); 359edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mDriverFD = -1; 360edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 361edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 362e16986cae281f118ecd563c384b7f6e5a4b937b5Jeff Brown 363e16986cae281f118ecd563c384b7f6e5a4b937b5Jeff Brown LOG_ALWAYS_FATAL_IF(mDriverFD < 0, "Binder driver could not be opened. Terminating."); 364edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 365edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 366edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source ProjectProcessState::~ProcessState() 367edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 368ff405785386ed8bdee50c4afdc4a4f9a73bcb81ezhongjie if (mDriverFD >= 0) { 369ff405785386ed8bdee50c4afdc4a4f9a73bcb81ezhongjie if (mVMStart != MAP_FAILED) { 370ff405785386ed8bdee50c4afdc4a4f9a73bcb81ezhongjie munmap(mVMStart, BINDER_VM_SIZE); 371ff405785386ed8bdee50c4afdc4a4f9a73bcb81ezhongjie } 372ff405785386ed8bdee50c4afdc4a4f9a73bcb81ezhongjie close(mDriverFD); 373ff405785386ed8bdee50c4afdc4a4f9a73bcb81ezhongjie } 374ff405785386ed8bdee50c4afdc4a4f9a73bcb81ezhongjie mDriverFD = -1; 375edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 376edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 377edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project}; // namespace android 378