ProcessState.cpp revision c5b2c0bf8007562536b822eb060fc54a01f8e08b
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 44edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#define BINDER_VM_SIZE (1*1024*1024) 45edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 46edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstatic bool gSingleProcess = false; 47edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 48edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 49edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project// --------------------------------------------------------------------------- 50edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 51edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectnamespace android { 52edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 53edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project// Global variables 54edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectint mArgC; 55edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectconst char* const* mArgV; 56edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectint mArgLen; 57edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 58edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectclass PoolThread : public Thread 59edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 60edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectpublic: 61edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project PoolThread(bool isMain) 62edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project : mIsMain(isMain) 63edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project { 64edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 65edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 66edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectprotected: 67edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project virtual bool threadLoop() 68edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project { 69edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project IPCThreadState::self()->joinThreadPool(mIsMain); 70edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return false; 71edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 72edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 73edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project const bool mIsMain; 74edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project}; 75edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 76edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectsp<ProcessState> ProcessState::self() 77edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 78edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (gProcess != NULL) return gProcess; 79edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 80edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project AutoMutex _l(gProcessMutex); 81edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (gProcess == NULL) gProcess = new ProcessState; 82edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return gProcess; 83edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 84edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 85edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid ProcessState::setSingleProcess(bool singleProcess) 86edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 87edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project gSingleProcess = singleProcess; 88edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 89edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 90edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 91edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid ProcessState::setContextObject(const sp<IBinder>& object) 92edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 93edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project setContextObject(object, String16("default")); 94edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 95edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 96edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectsp<IBinder> ProcessState::getContextObject(const sp<IBinder>& caller) 97edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 98edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (supportsProcesses()) { 99edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return getStrongProxyForHandle(0); 100edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } else { 101edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return getContextObject(String16("default"), caller); 102edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 103edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 104edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 105edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid ProcessState::setContextObject(const sp<IBinder>& object, const String16& name) 106edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 107edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project AutoMutex _l(mLock); 108edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mContexts.add(name, object); 109edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 110edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 111edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectsp<IBinder> ProcessState::getContextObject(const String16& name, const sp<IBinder>& caller) 112edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 113edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mLock.lock(); 114edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project sp<IBinder> object( 115edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mContexts.indexOfKey(name) >= 0 ? mContexts.valueFor(name) : NULL); 116edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mLock.unlock(); 117edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 118edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project //printf("Getting context object %s for %p\n", String8(name).string(), caller.get()); 119edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 120edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (object != NULL) return object; 121edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 122edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Don't attempt to retrieve contexts if we manage them 123edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (mManagesContexts) { 124edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project LOGE("getContextObject(%s) failed, but we manage the contexts!\n", 125edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project String8(name).string()); 126edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return NULL; 127edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 128edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 129edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project IPCThreadState* ipc = IPCThreadState::self(); 130edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project { 131edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project Parcel data, reply; 132edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // no interface token on this magic transaction 133edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project data.writeString16(name); 134edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project data.writeStrongBinder(caller); 135edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project status_t result = ipc->transact(0 /*magic*/, 0, data, &reply, 0); 136edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (result == NO_ERROR) { 137edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project object = reply.readStrongBinder(); 138edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 139edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 140edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 141edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project ipc->flushCommands(); 142edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 143edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (object != NULL) setContextObject(object, name); 144edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return object; 145edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 146edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 147edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectbool ProcessState::supportsProcesses() const 148edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 149edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return mDriverFD >= 0; 150edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 151edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 152edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid ProcessState::startThreadPool() 153edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 154edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project AutoMutex _l(mLock); 155edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (!mThreadPoolStarted) { 156edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mThreadPoolStarted = true; 157edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project spawnPooledThread(true); 158edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 159edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 160edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 161edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectbool ProcessState::isContextManager(void) const 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 Projectbool ProcessState::becomeContextManager(context_check_func checkFunc, void* userData) 167edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 168edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (!mManagesContexts) { 169edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project AutoMutex _l(mLock); 170edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mBinderContextCheckFunc = checkFunc; 171edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mBinderContextUserData = userData; 172edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (mDriverFD >= 0) { 173edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int dummy = 0; 174edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#if defined(HAVE_ANDROID_OS) 175edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project status_t result = ioctl(mDriverFD, BINDER_SET_CONTEXT_MGR, &dummy); 176edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#else 177edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project status_t result = INVALID_OPERATION; 178edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#endif 179edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (result == 0) { 180edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mManagesContexts = true; 181edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } else if (result == -1) { 182edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mBinderContextCheckFunc = NULL; 183edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mBinderContextUserData = NULL; 184edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project LOGE("Binder ioctl to become context manager failed: %s\n", strerror(errno)); 185edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 186edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } else { 187edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // If there is no driver, our only world is the local 188edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // process so we can always become the context manager there. 189edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mManagesContexts = true; 190edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 191edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 192edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return mManagesContexts; 193edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 194edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 195edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source ProjectProcessState::handle_entry* ProcessState::lookupHandleLocked(int32_t handle) 196edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 197edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project const size_t N=mHandleToObject.size(); 198edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (N <= (size_t)handle) { 199edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project handle_entry e; 200edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project e.binder = NULL; 201edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project e.refs = NULL; 202edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project status_t err = mHandleToObject.insertAt(e, N, handle+1-N); 203edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (err < NO_ERROR) return NULL; 204edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 205edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return &mHandleToObject.editItemAt(handle); 206edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 207edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 208edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectsp<IBinder> ProcessState::getStrongProxyForHandle(int32_t handle) 209edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 210edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project sp<IBinder> result; 211edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 212edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project AutoMutex _l(mLock); 213edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 214edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project handle_entry* e = lookupHandleLocked(handle); 215edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 216edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (e != NULL) { 217edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // We need to create a new BpBinder if there isn't currently one, OR we 218edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // are unable to acquire a weak reference on this current one. See comment 219edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // in getWeakProxyForHandle() for more info about this. 220edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project IBinder* b = e->binder; 221edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (b == NULL || !e->refs->attemptIncWeak(this)) { 222edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project b = new BpBinder(handle); 223edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project e->binder = b; 224edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (b) e->refs = b->getWeakRefs(); 225edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project result = b; 226edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } else { 227edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // This little bit of nastyness is to allow us to add a primary 228edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // reference to the remote proxy when this team doesn't have one 229edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // but another team is sending the handle to us. 230edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project result.force_set(b); 231edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project e->refs->decWeak(this); 232edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 233edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 234edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 235edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return result; 236edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 237edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 238edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectwp<IBinder> ProcessState::getWeakProxyForHandle(int32_t handle) 239edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 240edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project wp<IBinder> result; 241edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 242edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project AutoMutex _l(mLock); 243edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 244edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project handle_entry* e = lookupHandleLocked(handle); 245edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 246edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (e != NULL) { 247edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // We need to create a new BpBinder if there isn't currently one, OR we 248edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // are unable to acquire a weak reference on this current one. The 249edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // attemptIncWeak() is safe because we know the BpBinder destructor will always 250edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // call expungeHandle(), which acquires the same lock we are holding now. 251edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // We need to do this because there is a race condition between someone 252edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // releasing a reference on this BpBinder, and a new reference on its handle 253edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // arriving from the driver. 254edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project IBinder* b = e->binder; 255edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (b == NULL || !e->refs->attemptIncWeak(this)) { 256edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project b = new BpBinder(handle); 257edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project result = b; 258edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project e->binder = b; 259edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (b) e->refs = b->getWeakRefs(); 260edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } else { 261edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project result = b; 262edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project e->refs->decWeak(this); 263edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 264edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 265edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 266edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return result; 267edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 268edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 269edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid ProcessState::expungeHandle(int32_t handle, IBinder* binder) 270edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 271edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project AutoMutex _l(mLock); 272edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 273edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project handle_entry* e = lookupHandleLocked(handle); 274edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 275edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // This handle may have already been replaced with a new BpBinder 276edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // (if someone failed the AttemptIncWeak() above); we don't want 277edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // to overwrite it. 278edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (e && e->binder == binder) e->binder = NULL; 279edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 280edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 281edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid ProcessState::setArgs(int argc, const char* const argv[]) 282edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 283edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mArgC = argc; 284edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mArgV = (const char **)argv; 285edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 286edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mArgLen = 0; 287edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project for (int i=0; i<argc; i++) { 288edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mArgLen += strlen(argv[i]) + 1; 289edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 290edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mArgLen--; 291edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 292edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 293edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectint ProcessState::getArgC() const 294edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 295edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return mArgC; 296edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 297edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 298edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectconst char* const* ProcessState::getArgV() const 299edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 300edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return mArgV; 301edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 302edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 303edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid ProcessState::setArgV0(const char* txt) 304edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 305edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (mArgV != NULL) { 306edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project strncpy((char*)mArgV[0], txt, mArgLen); 307edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project set_process_name(txt); 308edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 309edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 310edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 311edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid ProcessState::spawnPooledThread(bool isMain) 312edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 313edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (mThreadPoolStarted) { 314edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int32_t s = android_atomic_add(1, &mThreadPoolSeq); 315edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project char buf[32]; 316edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project sprintf(buf, "Binder Thread #%d", s); 317edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project LOGV("Spawning new pooled thread, name=%s\n", buf); 318edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project sp<Thread> t = new PoolThread(isMain); 319edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project t->run(buf); 320edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 321edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 322edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 323edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstatic int open_driver() 324edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 325edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (gSingleProcess) { 326edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return -1; 327edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 328edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 329edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int fd = open("/dev/binder", O_RDWR); 330edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (fd >= 0) { 331edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project fcntl(fd, F_SETFD, FD_CLOEXEC); 332edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int vers; 333edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#if defined(HAVE_ANDROID_OS) 334edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project status_t result = ioctl(fd, BINDER_VERSION, &vers); 335edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#else 336edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project status_t result = -1; 337edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project errno = EPERM; 338edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#endif 339edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (result == -1) { 340edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project LOGE("Binder ioctl to obtain version failed: %s", strerror(errno)); 341edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project close(fd); 342edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project fd = -1; 343edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 344edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (result != 0 || vers != BINDER_CURRENT_PROTOCOL_VERSION) { 345edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project LOGE("Binder driver protocol does not match user space protocol!"); 346edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project close(fd); 347edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project fd = -1; 348edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 349edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#if defined(HAVE_ANDROID_OS) 350edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project size_t maxThreads = 15; 351edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project result = ioctl(fd, BINDER_SET_MAX_THREADS, &maxThreads); 352edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (result == -1) { 353edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project LOGE("Binder ioctl to set max threads failed: %s", strerror(errno)); 354edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 355edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#endif 356edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 357edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } else { 358edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project LOGW("Opening '/dev/binder' failed: %s\n", strerror(errno)); 359edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 360edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return fd; 361edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 362edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 363edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source ProjectProcessState::ProcessState() 364edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project : mDriverFD(open_driver()) 365edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project , mVMStart(MAP_FAILED) 366edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project , mManagesContexts(false) 367edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project , mBinderContextCheckFunc(NULL) 368edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project , mBinderContextUserData(NULL) 369edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project , mThreadPoolStarted(false) 370edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project , mThreadPoolSeq(1) 371edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 372edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (mDriverFD >= 0) { 373edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // XXX Ideally, there should be a specific define for whether we 374edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // have mmap (or whether we could possibly have the kernel module 375edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // availabla). 376edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#if !defined(HAVE_WIN32_IPC) 377edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // mmap the binder, providing a chunk of virtual address space to receive transactions. 378edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mVMStart = mmap(0, BINDER_VM_SIZE, PROT_READ, MAP_PRIVATE | MAP_NORESERVE, mDriverFD, 0); 379edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (mVMStart == MAP_FAILED) { 380edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // *sigh* 381edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project LOGE("Using /dev/binder failed: unable to mmap transaction memory.\n"); 382edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project close(mDriverFD); 383edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mDriverFD = -1; 384edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 385edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#else 386edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mDriverFD = -1; 387edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#endif 388edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 389edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (mDriverFD < 0) { 390edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Need to run without the driver, starting our own thread pool. 391edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 392edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 393edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 394edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source ProjectProcessState::~ProcessState() 395edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 396edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 397edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 398edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project}; // namespace android 399