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> 43edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 44c0c1092183ceb38dd4d70d2732dd3a743fefd567Rebecca Schultz Zavin#define BINDER_VM_SIZE ((1*1024*1024) - (4096 *2)) 45edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 46edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 47edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project// --------------------------------------------------------------------------- 48edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 49edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectnamespace android { 50edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 51edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project// Global variables 52edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectint mArgC; 53edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectconst char* const* mArgV; 54edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectint mArgLen; 55edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 56edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectclass PoolThread : public Thread 57edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 58edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectpublic: 59edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project PoolThread(bool isMain) 60edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project : mIsMain(isMain) 61edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project { 62edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 63edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 64edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectprotected: 65edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project virtual bool threadLoop() 66edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project { 67edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project IPCThreadState::self()->joinThreadPool(mIsMain); 68edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return false; 69edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 70edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 71edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project const bool mIsMain; 72edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project}; 73edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 74edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectsp<ProcessState> ProcessState::self() 75edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 76e8db871de7b26bf4fe7ae8d400c4a2c503cfe3a2Mathias Agopian Mutex::Autolock _l(gProcessMutex); 77e8db871de7b26bf4fe7ae8d400c4a2c503cfe3a2Mathias Agopian if (gProcess != NULL) { 78e8db871de7b26bf4fe7ae8d400c4a2c503cfe3a2Mathias Agopian return gProcess; 79e8db871de7b26bf4fe7ae8d400c4a2c503cfe3a2Mathias Agopian } 80e8db871de7b26bf4fe7ae8d400c4a2c503cfe3a2Mathias Agopian gProcess = new ProcessState; 81edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return gProcess; 82edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 83edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 84edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid ProcessState::setContextObject(const sp<IBinder>& object) 85edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 86edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project setContextObject(object, String16("default")); 87edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 88edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 89edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectsp<IBinder> ProcessState::getContextObject(const sp<IBinder>& caller) 90edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 91e16986cae281f118ecd563c384b7f6e5a4b937b5Jeff Brown return getStrongProxyForHandle(0); 92edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 93edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 94edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid ProcessState::setContextObject(const sp<IBinder>& object, const String16& name) 95edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 96edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project AutoMutex _l(mLock); 97edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mContexts.add(name, object); 98edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 99edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 100edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectsp<IBinder> ProcessState::getContextObject(const String16& name, const sp<IBinder>& caller) 101edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 102edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mLock.lock(); 103edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project sp<IBinder> object( 104edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mContexts.indexOfKey(name) >= 0 ? mContexts.valueFor(name) : NULL); 105edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mLock.unlock(); 106edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 107edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project //printf("Getting context object %s for %p\n", String8(name).string(), caller.get()); 108edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 109edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (object != NULL) return object; 110edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 111edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Don't attempt to retrieve contexts if we manage them 112edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (mManagesContexts) { 113e6f43ddce78d6846af12550ff9193c5c6fe5844bSteve Block ALOGE("getContextObject(%s) failed, but we manage the contexts!\n", 114edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project String8(name).string()); 115edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return NULL; 116edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 117edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 118edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project IPCThreadState* ipc = IPCThreadState::self(); 119edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project { 120edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project Parcel data, reply; 121edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // no interface token on this magic transaction 122edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project data.writeString16(name); 123edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project data.writeStrongBinder(caller); 124edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project status_t result = ipc->transact(0 /*magic*/, 0, data, &reply, 0); 125edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (result == NO_ERROR) { 126edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project object = reply.readStrongBinder(); 127edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 128edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 129edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 130edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project ipc->flushCommands(); 131edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 132edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (object != NULL) setContextObject(object, name); 133edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return object; 134edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 135edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 136edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid ProcessState::startThreadPool() 137edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 138edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project AutoMutex _l(mLock); 139edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (!mThreadPoolStarted) { 140edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mThreadPoolStarted = true; 141edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project spawnPooledThread(true); 142edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 143edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 144edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 145edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectbool ProcessState::isContextManager(void) const 146edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 147edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return mManagesContexts; 148edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 149edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 150edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectbool ProcessState::becomeContextManager(context_check_func checkFunc, void* userData) 151edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 152edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (!mManagesContexts) { 153edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project AutoMutex _l(mLock); 154edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mBinderContextCheckFunc = checkFunc; 155edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mBinderContextUserData = userData; 156e16986cae281f118ecd563c384b7f6e5a4b937b5Jeff Brown 157e16986cae281f118ecd563c384b7f6e5a4b937b5Jeff Brown int dummy = 0; 158e16986cae281f118ecd563c384b7f6e5a4b937b5Jeff Brown status_t result = ioctl(mDriverFD, BINDER_SET_CONTEXT_MGR, &dummy); 159e16986cae281f118ecd563c384b7f6e5a4b937b5Jeff Brown if (result == 0) { 160edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mManagesContexts = true; 161e16986cae281f118ecd563c384b7f6e5a4b937b5Jeff Brown } else if (result == -1) { 162e16986cae281f118ecd563c384b7f6e5a4b937b5Jeff Brown mBinderContextCheckFunc = NULL; 163e16986cae281f118ecd563c384b7f6e5a4b937b5Jeff Brown mBinderContextUserData = NULL; 164e6f43ddce78d6846af12550ff9193c5c6fe5844bSteve Block ALOGE("Binder ioctl to become context manager failed: %s\n", strerror(errno)); 165edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 166edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 167edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return mManagesContexts; 168edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 169edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 170edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source ProjectProcessState::handle_entry* ProcessState::lookupHandleLocked(int32_t handle) 171edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 172edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project const size_t N=mHandleToObject.size(); 173edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (N <= (size_t)handle) { 174edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project handle_entry e; 175edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project e.binder = NULL; 176edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project e.refs = NULL; 177edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project status_t err = mHandleToObject.insertAt(e, N, handle+1-N); 178edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (err < NO_ERROR) return NULL; 179edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 180edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return &mHandleToObject.editItemAt(handle); 181edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 182edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 183edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectsp<IBinder> ProcessState::getStrongProxyForHandle(int32_t handle) 184edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 185edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project sp<IBinder> result; 186edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 187edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project AutoMutex _l(mLock); 188edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 189edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project handle_entry* e = lookupHandleLocked(handle); 190edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 191edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (e != NULL) { 192edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // We need to create a new BpBinder if there isn't currently one, OR we 193edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // are unable to acquire a weak reference on this current one. See comment 194edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // in getWeakProxyForHandle() for more info about this. 195edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project IBinder* b = e->binder; 196edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (b == NULL || !e->refs->attemptIncWeak(this)) { 197a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor if (handle == 0) { 198a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // Special case for context manager... 199a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // The context manager is the only object for which we create 200a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // a BpBinder proxy without already holding a reference. 201a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // Perform a dummy transaction to ensure the context manager 202a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // is registered before we create the first local reference 203a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // to it (which will occur when creating the BpBinder). 204a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // If a local reference is created for the BpBinder when the 205a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // context manager is not present, the driver will fail to 206a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // provide a reference to the context manager, but the 207a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // driver API does not return status. 208a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // 209a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // Note that this is not race-free if the context manager 210a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // dies while this code runs. 211a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // 212a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // TODO: add a driver API to wait for context manager, or 213a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // stop special casing handle 0 for context manager and add 214a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // a driver API to get a handle to the context manager with 215a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor // proper reference counting. 216a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor 217a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor Parcel data; 218a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor status_t status = IPCThreadState::self()->transact( 219a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor 0, IBinder::PING_TRANSACTION, data, NULL, 0); 220a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor if (status == DEAD_OBJECT) 221a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor return NULL; 222a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor } 223a7b0f04aaf7f04a9617dbbc839b1aaa6f20ca6d6Todd Poynor 224edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project b = new BpBinder(handle); 225edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project e->binder = b; 226edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (b) e->refs = b->getWeakRefs(); 227edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project result = b; 228edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } else { 229edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // This little bit of nastyness is to allow us to add a primary 230edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // reference to the remote proxy when this team doesn't have one 231edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // but another team is sending the handle to us. 232edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project result.force_set(b); 233edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project e->refs->decWeak(this); 234edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 235edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 236edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 237edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return result; 238edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 239edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 240edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectwp<IBinder> ProcessState::getWeakProxyForHandle(int32_t handle) 241edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 242edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project wp<IBinder> result; 243edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 244edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project AutoMutex _l(mLock); 245edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 246edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project handle_entry* e = lookupHandleLocked(handle); 247edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 248edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (e != NULL) { 249edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // We need to create a new BpBinder if there isn't currently one, OR we 250edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // are unable to acquire a weak reference on this current one. The 251edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // attemptIncWeak() is safe because we know the BpBinder destructor will always 252edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // call expungeHandle(), which acquires the same lock we are holding now. 253edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // We need to do this because there is a race condition between someone 254edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // releasing a reference on this BpBinder, and a new reference on its handle 255edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // arriving from the driver. 256edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project IBinder* b = e->binder; 257edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (b == NULL || !e->refs->attemptIncWeak(this)) { 258edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project b = new BpBinder(handle); 259edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project result = b; 260edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project e->binder = b; 261edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (b) e->refs = b->getWeakRefs(); 262edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } else { 263edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project result = b; 264edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project e->refs->decWeak(this); 265edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 266edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 267edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 268edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return result; 269edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 270edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 271edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid ProcessState::expungeHandle(int32_t handle, IBinder* binder) 272edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 273edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project AutoMutex _l(mLock); 274edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 275edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project handle_entry* e = lookupHandleLocked(handle); 276edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 277edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // This handle may have already been replaced with a new BpBinder 278edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // (if someone failed the AttemptIncWeak() above); we don't want 279edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // to overwrite it. 280edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (e && e->binder == binder) e->binder = NULL; 281edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 282edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 283edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid ProcessState::setArgs(int argc, const char* const argv[]) 284edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 285edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mArgC = argc; 286edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mArgV = (const char **)argv; 287edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 288edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mArgLen = 0; 289edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project for (int i=0; i<argc; i++) { 290edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mArgLen += strlen(argv[i]) + 1; 291edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 292edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mArgLen--; 293edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 294edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 295edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectint ProcessState::getArgC() const 296edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 297edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return mArgC; 298edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 299edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 300edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectconst char* const* ProcessState::getArgV() const 301edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 302edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return mArgV; 303edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 304edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 305edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid ProcessState::setArgV0(const char* txt) 306edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 307edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (mArgV != NULL) { 308edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project strncpy((char*)mArgV[0], txt, mArgLen); 309edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project set_process_name(txt); 310edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 311edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 312edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 313e3e43b384e0603e5883b501cdb169641fab8fea2Mathias AgopianString8 ProcessState::makeBinderThreadName() { 314e3e43b384e0603e5883b501cdb169641fab8fea2Mathias Agopian int32_t s = android_atomic_add(1, &mThreadPoolSeq); 315e3e43b384e0603e5883b501cdb169641fab8fea2Mathias Agopian String8 name; 316e3e43b384e0603e5883b501cdb169641fab8fea2Mathias Agopian name.appendFormat("Binder_%X", s); 317e3e43b384e0603e5883b501cdb169641fab8fea2Mathias Agopian return name; 318e3e43b384e0603e5883b501cdb169641fab8fea2Mathias Agopian} 319e3e43b384e0603e5883b501cdb169641fab8fea2Mathias Agopian 320edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid ProcessState::spawnPooledThread(bool isMain) 321edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 322edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (mThreadPoolStarted) { 323e3e43b384e0603e5883b501cdb169641fab8fea2Mathias Agopian String8 name = makeBinderThreadName(); 324e3e43b384e0603e5883b501cdb169641fab8fea2Mathias Agopian ALOGV("Spawning new pooled thread, name=%s\n", name.string()); 325edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project sp<Thread> t = new PoolThread(isMain); 326e3e43b384e0603e5883b501cdb169641fab8fea2Mathias Agopian t->run(name.string()); 327edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 328edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 329edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 3301b80f793d2328dd94a151411a1cc3a676121ffc7Mathias Agopianstatus_t ProcessState::setThreadPoolMaxThreadCount(size_t maxThreads) { 3311b80f793d2328dd94a151411a1cc3a676121ffc7Mathias Agopian status_t result = NO_ERROR; 3321b80f793d2328dd94a151411a1cc3a676121ffc7Mathias Agopian if (ioctl(mDriverFD, BINDER_SET_MAX_THREADS, &maxThreads) == -1) { 3331b80f793d2328dd94a151411a1cc3a676121ffc7Mathias Agopian result = -errno; 3341b80f793d2328dd94a151411a1cc3a676121ffc7Mathias Agopian ALOGE("Binder ioctl to set max threads failed: %s", strerror(-result)); 3351b80f793d2328dd94a151411a1cc3a676121ffc7Mathias Agopian } 3361b80f793d2328dd94a151411a1cc3a676121ffc7Mathias Agopian return result; 3371b80f793d2328dd94a151411a1cc3a676121ffc7Mathias Agopian} 3381b80f793d2328dd94a151411a1cc3a676121ffc7Mathias Agopian 339e3e43b384e0603e5883b501cdb169641fab8fea2Mathias Agopianvoid ProcessState::giveThreadPoolName() { 340e3e43b384e0603e5883b501cdb169641fab8fea2Mathias Agopian androidSetThreadName( makeBinderThreadName().string() ); 341e3e43b384e0603e5883b501cdb169641fab8fea2Mathias Agopian} 342e3e43b384e0603e5883b501cdb169641fab8fea2Mathias Agopian 343edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstatic int open_driver() 344edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 345edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int fd = open("/dev/binder", O_RDWR); 346edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (fd >= 0) { 347edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project fcntl(fd, F_SETFD, FD_CLOEXEC); 348edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int vers; 349edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project status_t result = ioctl(fd, BINDER_VERSION, &vers); 350edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (result == -1) { 351e6f43ddce78d6846af12550ff9193c5c6fe5844bSteve Block ALOGE("Binder ioctl to obtain version failed: %s", strerror(errno)); 352edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project close(fd); 353edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project fd = -1; 354edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 355edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (result != 0 || vers != BINDER_CURRENT_PROTOCOL_VERSION) { 356e6f43ddce78d6846af12550ff9193c5c6fe5844bSteve Block ALOGE("Binder driver protocol does not match user space protocol!"); 357edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project close(fd); 358edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project fd = -1; 359edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 360edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project size_t maxThreads = 15; 361edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project result = ioctl(fd, BINDER_SET_MAX_THREADS, &maxThreads); 362edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (result == -1) { 363e6f43ddce78d6846af12550ff9193c5c6fe5844bSteve Block ALOGE("Binder ioctl to set max threads failed: %s", strerror(errno)); 364edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 365edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } else { 36632397c1cd3327905173b36baa6fd1c579bc328ffSteve Block ALOGW("Opening '/dev/binder' failed: %s\n", strerror(errno)); 367edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 368edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return fd; 369edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 370edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 371edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source ProjectProcessState::ProcessState() 372edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project : mDriverFD(open_driver()) 373edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project , mVMStart(MAP_FAILED) 374edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project , mManagesContexts(false) 375edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project , mBinderContextCheckFunc(NULL) 376edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project , mBinderContextUserData(NULL) 377edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project , mThreadPoolStarted(false) 378edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project , mThreadPoolSeq(1) 379edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 380edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (mDriverFD >= 0) { 381edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // XXX Ideally, there should be a specific define for whether we 382edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // have mmap (or whether we could possibly have the kernel module 383edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // availabla). 384edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#if !defined(HAVE_WIN32_IPC) 385edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // mmap the binder, providing a chunk of virtual address space to receive transactions. 386edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mVMStart = mmap(0, BINDER_VM_SIZE, PROT_READ, MAP_PRIVATE | MAP_NORESERVE, mDriverFD, 0); 387edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (mVMStart == MAP_FAILED) { 388edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // *sigh* 389e6f43ddce78d6846af12550ff9193c5c6fe5844bSteve Block ALOGE("Using /dev/binder failed: unable to mmap transaction memory.\n"); 390edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project close(mDriverFD); 391edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mDriverFD = -1; 392edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 393edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#else 394edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mDriverFD = -1; 395edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#endif 396edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 397e16986cae281f118ecd563c384b7f6e5a4b937b5Jeff Brown 398e16986cae281f118ecd563c384b7f6e5a4b937b5Jeff Brown LOG_ALWAYS_FATAL_IF(mDriverFD < 0, "Binder driver could not be opened. Terminating."); 399edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 400edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 401edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source ProjectProcessState::~ProcessState() 402edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 403edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 404edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 405edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project}; // namespace android 406