ProcessState.cpp revision e8db871de7b26bf4fe7ae8d400c4a2c503cfe3a2
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)) { 197edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project b = new BpBinder(handle); 198edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project e->binder = b; 199edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (b) e->refs = b->getWeakRefs(); 200edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project result = b; 201edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } else { 202edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // This little bit of nastyness is to allow us to add a primary 203edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // reference to the remote proxy when this team doesn't have one 204edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // but another team is sending the handle to us. 205edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project result.force_set(b); 206edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project e->refs->decWeak(this); 207edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 208edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 209edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 210edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return result; 211edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 212edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 213edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectwp<IBinder> ProcessState::getWeakProxyForHandle(int32_t handle) 214edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 215edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project wp<IBinder> result; 216edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 217edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project AutoMutex _l(mLock); 218edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 219edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project handle_entry* e = lookupHandleLocked(handle); 220edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 221edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (e != NULL) { 222edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // We need to create a new BpBinder if there isn't currently one, OR we 223edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // are unable to acquire a weak reference on this current one. The 224edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // attemptIncWeak() is safe because we know the BpBinder destructor will always 225edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // call expungeHandle(), which acquires the same lock we are holding now. 226edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // We need to do this because there is a race condition between someone 227edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // releasing a reference on this BpBinder, and a new reference on its handle 228edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // arriving from the driver. 229edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project IBinder* b = e->binder; 230edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (b == NULL || !e->refs->attemptIncWeak(this)) { 231edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project b = new BpBinder(handle); 232edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project result = b; 233edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project e->binder = b; 234edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (b) e->refs = b->getWeakRefs(); 235edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } else { 236edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project result = b; 237edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project e->refs->decWeak(this); 238edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 239edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 240edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 241edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return result; 242edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 243edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 244edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid ProcessState::expungeHandle(int32_t handle, IBinder* binder) 245edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 246edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project AutoMutex _l(mLock); 247edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 248edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project handle_entry* e = lookupHandleLocked(handle); 249edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 250edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // This handle may have already been replaced with a new BpBinder 251edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // (if someone failed the AttemptIncWeak() above); we don't want 252edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // to overwrite it. 253edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (e && e->binder == binder) e->binder = NULL; 254edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 255edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 256edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid ProcessState::setArgs(int argc, const char* const argv[]) 257edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 258edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mArgC = argc; 259edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mArgV = (const char **)argv; 260edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 261edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mArgLen = 0; 262edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project for (int i=0; i<argc; i++) { 263edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mArgLen += strlen(argv[i]) + 1; 264edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 265edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mArgLen--; 266edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 267edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 268edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectint ProcessState::getArgC() const 269edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 270edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return mArgC; 271edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 272edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 273edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectconst char* const* ProcessState::getArgV() const 274edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 275edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return mArgV; 276edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 277edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 278edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid ProcessState::setArgV0(const char* txt) 279edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 280edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (mArgV != NULL) { 281edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project strncpy((char*)mArgV[0], txt, mArgLen); 282edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project set_process_name(txt); 283edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 284edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 285edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 286edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid ProcessState::spawnPooledThread(bool isMain) 287edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 288edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (mThreadPoolStarted) { 289edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int32_t s = android_atomic_add(1, &mThreadPoolSeq); 290102d539a4c6e70ec2403bfd2bfef3a3373da15acGlenn Kasten char buf[16]; 291102d539a4c6e70ec2403bfd2bfef3a3373da15acGlenn Kasten snprintf(buf, sizeof(buf), "Binder_%X", s); 2926807e59e0ff943cc6225d46e3c33a8a7eae9b3d7Steve Block ALOGV("Spawning new pooled thread, name=%s\n", buf); 293edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project sp<Thread> t = new PoolThread(isMain); 294edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project t->run(buf); 295edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 296edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 297edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 298edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstatic int open_driver() 299edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 300edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int fd = open("/dev/binder", O_RDWR); 301edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (fd >= 0) { 302edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project fcntl(fd, F_SETFD, FD_CLOEXEC); 303edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int vers; 304edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project status_t result = ioctl(fd, BINDER_VERSION, &vers); 305edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (result == -1) { 306e6f43ddce78d6846af12550ff9193c5c6fe5844bSteve Block ALOGE("Binder ioctl to obtain version failed: %s", strerror(errno)); 307edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project close(fd); 308edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project fd = -1; 309edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 310edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (result != 0 || vers != BINDER_CURRENT_PROTOCOL_VERSION) { 311e6f43ddce78d6846af12550ff9193c5c6fe5844bSteve Block ALOGE("Binder driver protocol does not match user space protocol!"); 312edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project close(fd); 313edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project fd = -1; 314edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 315edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project size_t maxThreads = 15; 316edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project result = ioctl(fd, BINDER_SET_MAX_THREADS, &maxThreads); 317edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (result == -1) { 318e6f43ddce78d6846af12550ff9193c5c6fe5844bSteve Block ALOGE("Binder ioctl to set max threads failed: %s", strerror(errno)); 319edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 320edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } else { 32132397c1cd3327905173b36baa6fd1c579bc328ffSteve Block ALOGW("Opening '/dev/binder' failed: %s\n", strerror(errno)); 322edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 323edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return fd; 324edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 325edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 326edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source ProjectProcessState::ProcessState() 327edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project : mDriverFD(open_driver()) 328edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project , mVMStart(MAP_FAILED) 329edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project , mManagesContexts(false) 330edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project , mBinderContextCheckFunc(NULL) 331edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project , mBinderContextUserData(NULL) 332edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project , mThreadPoolStarted(false) 333edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project , mThreadPoolSeq(1) 334edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 335edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (mDriverFD >= 0) { 336edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // XXX Ideally, there should be a specific define for whether we 337edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // have mmap (or whether we could possibly have the kernel module 338edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // availabla). 339edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#if !defined(HAVE_WIN32_IPC) 340edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // mmap the binder, providing a chunk of virtual address space to receive transactions. 341edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mVMStart = mmap(0, BINDER_VM_SIZE, PROT_READ, MAP_PRIVATE | MAP_NORESERVE, mDriverFD, 0); 342edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (mVMStart == MAP_FAILED) { 343edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // *sigh* 344e6f43ddce78d6846af12550ff9193c5c6fe5844bSteve Block ALOGE("Using /dev/binder failed: unable to mmap transaction memory.\n"); 345edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project close(mDriverFD); 346edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mDriverFD = -1; 347edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 348edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#else 349edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mDriverFD = -1; 350edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#endif 351edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 352e16986cae281f118ecd563c384b7f6e5a4b937b5Jeff Brown 353e16986cae281f118ecd563c384b7f6e5a4b937b5Jeff Brown LOG_ALWAYS_FATAL_IF(mDriverFD < 0, "Binder driver could not be opened. Terminating."); 354edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 355edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 356edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source ProjectProcessState::~ProcessState() 357edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 358edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 359edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 360edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project}; // namespace android 361