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 19edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <cutils/process_name.h> 20edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 21c5b2c0bf8007562536b822eb060fc54a01f8e08bMathias Agopian#include <binder/ProcessState.h> 22edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 23edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <utils/Atomic.h> 24c5b2c0bf8007562536b822eb060fc54a01f8e08bMathias Agopian#include <binder/BpBinder.h> 25c5b2c0bf8007562536b822eb060fc54a01f8e08bMathias Agopian#include <binder/IPCThreadState.h> 26edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <utils/Log.h> 27edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <utils/String8.h> 28c5b2c0bf8007562536b822eb060fc54a01f8e08bMathias Agopian#include <binder/IServiceManager.h> 29edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <utils/String8.h> 30edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <utils/threads.h> 31edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 32208059f67ed2dd9fa025e07fcb6954d3cb61c79eMathias Agopian#include <private/binder/binder_module.h> 33208059f67ed2dd9fa025e07fcb6954d3cb61c79eMathias Agopian#include <private/binder/Static.h> 34edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 35edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <errno.h> 36edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <fcntl.h> 37edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <stdio.h> 38edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <stdlib.h> 39edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <unistd.h> 40edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <sys/ioctl.h> 41edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <sys/mman.h> 42edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <sys/stat.h> 43a082fa8a6bd4303d5a5921133746f9e2856ab0d4Philip Cuadra#include <sys/types.h> 44edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 45c0c1092183ceb38dd4d70d2732dd3a743fefd567Rebecca Schultz Zavin#define BINDER_VM_SIZE ((1*1024*1024) - (4096 *2)) 46376b822728c582a9deb26ce339deb5204ae4d22eWale Ogunwale#define DEFAULT_MAX_BINDER_THREADS 15 47edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 48a082fa8a6bd4303d5a5921133746f9e2856ab0d4Philip Cuadra// ------------------------------------------------------------------------- 49edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 50edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectnamespace android { 51376b822728c582a9deb26ce339deb5204ae4d22eWale Ogunwale 52edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectclass PoolThread : public Thread 53edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 54edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectpublic: 55edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project PoolThread(bool isMain) 56edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project : mIsMain(isMain) 57edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project { 58edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 59edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 60edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectprotected: 61edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project virtual bool threadLoop() 62edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project { 63edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project IPCThreadState::self()->joinThreadPool(mIsMain); 64edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return false; 65edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 66edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 67edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project const bool mIsMain; 68edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project}; 69edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 70edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectsp<ProcessState> ProcessState::self() 71edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 72e8db871de7b26bf4fe7ae8d400c4a2c503cfe3a2Mathias Agopian Mutex::Autolock _l(gProcessMutex); 73e8db871de7b26bf4fe7ae8d400c4a2c503cfe3a2Mathias Agopian if (gProcess != NULL) { 74e8db871de7b26bf4fe7ae8d400c4a2c503cfe3a2Mathias Agopian return gProcess; 75e8db871de7b26bf4fe7ae8d400c4a2c503cfe3a2Mathias Agopian } 76e8db871de7b26bf4fe7ae8d400c4a2c503cfe3a2Mathias Agopian gProcess = new ProcessState; 77edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return gProcess; 78edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 79edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 80edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid ProcessState::setContextObject(const sp<IBinder>& object) 81edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 82edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project setContextObject(object, String16("default")); 83edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 84edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 856f4f3ab36c5ed1df84eb3a9f7475f0ac42952f58Colin Crosssp<IBinder> ProcessState::getContextObject(const sp<IBinder>& /*caller*/) 86edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 87e16986cae281f118ecd563c384b7f6e5a4b937b5Jeff Brown return getStrongProxyForHandle(0); 88edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 89edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 90edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid ProcessState::setContextObject(const sp<IBinder>& object, const String16& name) 91edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 92edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project AutoMutex _l(mLock); 93edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mContexts.add(name, object); 94edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 95edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 96edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectsp<IBinder> ProcessState::getContextObject(const String16& name, const sp<IBinder>& caller) 97edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 98edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mLock.lock(); 99edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project sp<IBinder> object( 100edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mContexts.indexOfKey(name) >= 0 ? mContexts.valueFor(name) : NULL); 101edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mLock.unlock(); 102edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 103edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project //printf("Getting context object %s for %p\n", String8(name).string(), caller.get()); 104edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 105edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (object != NULL) return object; 106edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 107edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Don't attempt to retrieve contexts if we manage them 108edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (mManagesContexts) { 109e6f43ddce78d6846af12550ff9193c5c6fe5844bSteve Block ALOGE("getContextObject(%s) failed, but we manage the contexts!\n", 110edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project String8(name).string()); 111edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return NULL; 112edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 113edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 114edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project IPCThreadState* ipc = IPCThreadState::self(); 115edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project { 116edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project Parcel data, reply; 117edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // no interface token on this magic transaction 118edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project data.writeString16(name); 119edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project data.writeStrongBinder(caller); 120edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project status_t result = ipc->transact(0 /*magic*/, 0, data, &reply, 0); 121edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (result == NO_ERROR) { 122edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project object = reply.readStrongBinder(); 123edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 124edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 125edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 126edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project ipc->flushCommands(); 127edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 128edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (object != NULL) setContextObject(object, name); 129edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return object; 130edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 131edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 132edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid ProcessState::startThreadPool() 133edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 134edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project AutoMutex _l(mLock); 135edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (!mThreadPoolStarted) { 136edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mThreadPoolStarted = true; 137edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project spawnPooledThread(true); 138edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 139edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 140edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 141edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectbool ProcessState::isContextManager(void) const 142edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 143edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return mManagesContexts; 144edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 145edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 146edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectbool ProcessState::becomeContextManager(context_check_func checkFunc, void* userData) 147edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 148edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (!mManagesContexts) { 149edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project AutoMutex _l(mLock); 150edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mBinderContextCheckFunc = checkFunc; 151edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mBinderContextUserData = userData; 152e16986cae281f118ecd563c384b7f6e5a4b937b5Jeff Brown 153e16986cae281f118ecd563c384b7f6e5a4b937b5Jeff Brown int dummy = 0; 154e16986cae281f118ecd563c384b7f6e5a4b937b5Jeff Brown status_t result = ioctl(mDriverFD, BINDER_SET_CONTEXT_MGR, &dummy); 155e16986cae281f118ecd563c384b7f6e5a4b937b5Jeff Brown if (result == 0) { 156edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mManagesContexts = true; 157e16986cae281f118ecd563c384b7f6e5a4b937b5Jeff Brown } else if (result == -1) { 158e16986cae281f118ecd563c384b7f6e5a4b937b5Jeff Brown mBinderContextCheckFunc = NULL; 159e16986cae281f118ecd563c384b7f6e5a4b937b5Jeff Brown mBinderContextUserData = NULL; 160e6f43ddce78d6846af12550ff9193c5c6fe5844bSteve Block ALOGE("Binder ioctl to become context manager failed: %s\n", strerror(errno)); 161edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 162edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 163edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return mManagesContexts; 164edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 165edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 166edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source ProjectProcessState::handle_entry* ProcessState::lookupHandleLocked(int32_t handle) 167edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 168edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project const size_t N=mHandleToObject.size(); 169edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (N <= (size_t)handle) { 170edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project handle_entry e; 171edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project e.binder = NULL; 172edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project e.refs = NULL; 173edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project status_t err = mHandleToObject.insertAt(e, N, handle+1-N); 174edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (err < NO_ERROR) return NULL; 175edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 176edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return &mHandleToObject.editItemAt(handle); 177edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 178edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 179edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectsp<IBinder> ProcessState::getStrongProxyForHandle(int32_t handle) 180edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 181edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project sp<IBinder> result; 182edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 183edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project AutoMutex _l(mLock); 184edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 185edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project handle_entry* e = lookupHandleLocked(handle); 186edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 187edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (e != NULL) { 188edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // We need to create a new BpBinder if there isn't currently one, OR we 189edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // are unable to acquire a weak reference on this current one. See comment 190edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // in getWeakProxyForHandle() for more info about this. 191edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project IBinder* b = e->binder; 192edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (b == NULL || !e->refs->attemptIncWeak(this)) { 193a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor if (handle == 0) { 194a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // Special case for context manager... 195a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // The context manager is the only object for which we create 196a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // a BpBinder proxy without already holding a reference. 197a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // Perform a dummy transaction to ensure the context manager 198a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // is registered before we create the first local reference 199a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // to it (which will occur when creating the BpBinder). 200a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // If a local reference is created for the BpBinder when the 201a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // context manager is not present, the driver will fail to 202a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // provide a reference to the context manager, but the 203a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // driver API does not return status. 204a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // 205a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // Note that this is not race-free if the context manager 206a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // dies while this code runs. 207a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // 208a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // TODO: add a driver API to wait for context manager, or 209a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // stop special casing handle 0 for context manager and add 210a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // a driver API to get a handle to the context manager with 211a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // proper reference counting. 212a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor 213a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor Parcel data; 214a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor status_t status = IPCThreadState::self()->transact( 215a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor 0, IBinder::PING_TRANSACTION, data, NULL, 0); 216a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor if (status == DEAD_OBJECT) 217a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor return NULL; 218a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor } 219a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor 220edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project b = new BpBinder(handle); 221edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project e->binder = b; 222edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (b) e->refs = b->getWeakRefs(); 223edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project result = b; 224edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } else { 225edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // This little bit of nastyness is to allow us to add a primary 226edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // reference to the remote proxy when this team doesn't have one 227edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // but another team is sending the handle to us. 228edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project result.force_set(b); 229edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project e->refs->decWeak(this); 230edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 231edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 232edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 233edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return result; 234edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 235edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 236edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectwp<IBinder> ProcessState::getWeakProxyForHandle(int32_t handle) 237edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 238edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project wp<IBinder> result; 239edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 240edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project AutoMutex _l(mLock); 241edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 242edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project handle_entry* e = lookupHandleLocked(handle); 243edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 244edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (e != NULL) { 245edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // We need to create a new BpBinder if there isn't currently one, OR we 246edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // are unable to acquire a weak reference on this current one. The 247edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // attemptIncWeak() is safe because we know the BpBinder destructor will always 248edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // call expungeHandle(), which acquires the same lock we are holding now. 249edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // We need to do this because there is a race condition between someone 250edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // releasing a reference on this BpBinder, and a new reference on its handle 251edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // arriving from the driver. 252edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project IBinder* b = e->binder; 253edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (b == NULL || !e->refs->attemptIncWeak(this)) { 254edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project b = new BpBinder(handle); 255edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project result = b; 256edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project e->binder = b; 257edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (b) e->refs = b->getWeakRefs(); 258edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } else { 259edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project result = b; 260edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project e->refs->decWeak(this); 261edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 262edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 263edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 264edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return result; 265edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 266edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 267edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid ProcessState::expungeHandle(int32_t handle, IBinder* binder) 268edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 269edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project AutoMutex _l(mLock); 270edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 271edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project handle_entry* e = lookupHandleLocked(handle); 272edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 273edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // This handle may have already been replaced with a new BpBinder 274edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // (if someone failed the AttemptIncWeak() above); we don't want 275edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // to overwrite it. 276edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (e && e->binder == binder) e->binder = NULL; 277edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 278edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 279e3e43b384e0603e5883b501cdb169641fab8fea2Mathias AgopianString8 ProcessState::makeBinderThreadName() { 280e3e43b384e0603e5883b501cdb169641fab8fea2Mathias Agopian int32_t s = android_atomic_add(1, &mThreadPoolSeq); 281a082fa8a6bd4303d5a5921133746f9e2856ab0d4Philip Cuadra pid_t pid = getpid(); 282e3e43b384e0603e5883b501cdb169641fab8fea2Mathias Agopian String8 name; 283a082fa8a6bd4303d5a5921133746f9e2856ab0d4Philip Cuadra name.appendFormat("Binder:%d_%X", pid, s); 284e3e43b384e0603e5883b501cdb169641fab8fea2Mathias Agopian return name; 285e3e43b384e0603e5883b501cdb169641fab8fea2Mathias Agopian} 286e3e43b384e0603e5883b501cdb169641fab8fea2Mathias Agopian 287edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid ProcessState::spawnPooledThread(bool isMain) 288edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 289edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (mThreadPoolStarted) { 290e3e43b384e0603e5883b501cdb169641fab8fea2Mathias Agopian String8 name = makeBinderThreadName(); 291e3e43b384e0603e5883b501cdb169641fab8fea2Mathias Agopian ALOGV("Spawning new pooled thread, name=%s\n", name.string()); 292edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project sp<Thread> t = new PoolThread(isMain); 293e3e43b384e0603e5883b501cdb169641fab8fea2Mathias Agopian t->run(name.string()); 294edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 295edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 296edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 2971b80f793d2328dd94a151411a1cc3a676121ffc7Mathias Agopianstatus_t ProcessState::setThreadPoolMaxThreadCount(size_t maxThreads) { 2981b80f793d2328dd94a151411a1cc3a676121ffc7Mathias Agopian status_t result = NO_ERROR; 299376b822728c582a9deb26ce339deb5204ae4d22eWale Ogunwale if (ioctl(mDriverFD, BINDER_SET_MAX_THREADS, &maxThreads) != -1) { 300376b822728c582a9deb26ce339deb5204ae4d22eWale Ogunwale mMaxThreads = maxThreads; 301376b822728c582a9deb26ce339deb5204ae4d22eWale Ogunwale } else { 3021b80f793d2328dd94a151411a1cc3a676121ffc7Mathias Agopian result = -errno; 3031b80f793d2328dd94a151411a1cc3a676121ffc7Mathias Agopian ALOGE("Binder ioctl to set max threads failed: %s", strerror(-result)); 3041b80f793d2328dd94a151411a1cc3a676121ffc7Mathias Agopian } 3051b80f793d2328dd94a151411a1cc3a676121ffc7Mathias Agopian return result; 3061b80f793d2328dd94a151411a1cc3a676121ffc7Mathias Agopian} 3071b80f793d2328dd94a151411a1cc3a676121ffc7Mathias Agopian 308e3e43b384e0603e5883b501cdb169641fab8fea2Mathias Agopianvoid ProcessState::giveThreadPoolName() { 309e3e43b384e0603e5883b501cdb169641fab8fea2Mathias Agopian androidSetThreadName( makeBinderThreadName().string() ); 310e3e43b384e0603e5883b501cdb169641fab8fea2Mathias Agopian} 311e3e43b384e0603e5883b501cdb169641fab8fea2Mathias Agopian 312edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstatic int open_driver() 313edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 3140fe7ce375ed6c9fcd86b8bb3a836bc37c9740831Nick Kralevich int fd = open("/dev/binder", O_RDWR | O_CLOEXEC); 315edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (fd >= 0) { 31678181df1efee04bb861893714d8b11a24243153fJin Wei int vers = 0; 317edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project status_t result = ioctl(fd, BINDER_VERSION, &vers); 318edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (result == -1) { 319e6f43ddce78d6846af12550ff9193c5c6fe5844bSteve Block ALOGE("Binder ioctl to obtain version failed: %s", strerror(errno)); 320edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project close(fd); 321edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project fd = -1; 322edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 323edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (result != 0 || vers != BINDER_CURRENT_PROTOCOL_VERSION) { 324e6f43ddce78d6846af12550ff9193c5c6fe5844bSteve Block ALOGE("Binder driver protocol does not match user space protocol!"); 325edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project close(fd); 326edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project fd = -1; 327edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 328376b822728c582a9deb26ce339deb5204ae4d22eWale Ogunwale size_t maxThreads = DEFAULT_MAX_BINDER_THREADS; 329edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project result = ioctl(fd, BINDER_SET_MAX_THREADS, &maxThreads); 330edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (result == -1) { 331e6f43ddce78d6846af12550ff9193c5c6fe5844bSteve Block ALOGE("Binder ioctl to set max threads failed: %s", strerror(errno)); 332edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 333edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } else { 33432397c1cd3327905173b36baa6fd1c579bc328ffSteve Block ALOGW("Opening '/dev/binder' failed: %s\n", strerror(errno)); 335edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 336edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return fd; 337edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 338edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 339edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source ProjectProcessState::ProcessState() 340edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project : mDriverFD(open_driver()) 341edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project , mVMStart(MAP_FAILED) 342376b822728c582a9deb26ce339deb5204ae4d22eWale Ogunwale , mThreadCountLock(PTHREAD_MUTEX_INITIALIZER) 343376b822728c582a9deb26ce339deb5204ae4d22eWale Ogunwale , mThreadCountDecrement(PTHREAD_COND_INITIALIZER) 344376b822728c582a9deb26ce339deb5204ae4d22eWale Ogunwale , mExecutingThreadsCount(0) 345376b822728c582a9deb26ce339deb5204ae4d22eWale Ogunwale , mMaxThreads(DEFAULT_MAX_BINDER_THREADS) 34696e8322f4d11af8538d6d0db5f1a11338b8aee9dColin Cross , mStarvationStartTimeMs(0) 347edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project , mManagesContexts(false) 348edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project , mBinderContextCheckFunc(NULL) 349edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project , mBinderContextUserData(NULL) 350edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project , mThreadPoolStarted(false) 351edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project , mThreadPoolSeq(1) 352edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 353edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (mDriverFD >= 0) { 354edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // mmap the binder, providing a chunk of virtual address space to receive transactions. 355edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mVMStart = mmap(0, BINDER_VM_SIZE, PROT_READ, MAP_PRIVATE | MAP_NORESERVE, mDriverFD, 0); 356edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (mVMStart == MAP_FAILED) { 357edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // *sigh* 358e6f43ddce78d6846af12550ff9193c5c6fe5844bSteve Block ALOGE("Using /dev/binder failed: unable to mmap transaction memory.\n"); 359edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project close(mDriverFD); 360edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mDriverFD = -1; 361edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 362edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 363e16986cae281f118ecd563c384b7f6e5a4b937b5Jeff Brown 364e16986cae281f118ecd563c384b7f6e5a4b937b5Jeff Brown LOG_ALWAYS_FATAL_IF(mDriverFD < 0, "Binder driver could not be opened. Terminating."); 365edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 366edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 367edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source ProjectProcessState::~ProcessState() 368edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 369edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 370edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 371edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project}; // namespace android 372