The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2005 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #define LOG_TAG "ProcessState" |
| 18 | |
Mathias Agopian | c5b2c0b | 2009-05-19 19:08:10 -0700 | [diff] [blame] | 19 | #include <binder/ProcessState.h> |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 20 | |
Mathias Agopian | c5b2c0b | 2009-05-19 19:08:10 -0700 | [diff] [blame] | 21 | #include <binder/BpBinder.h> |
| 22 | #include <binder/IPCThreadState.h> |
Steven Moreland | 2716e11 | 2018-02-23 14:57:20 -0800 | [diff] [blame] | 23 | #include <binder/IServiceManager.h> |
Steven Moreland | c709dd8 | 2019-08-05 20:30:14 -0700 | [diff] [blame] | 24 | #include <binder/Stability.h> |
Steven Moreland | 2716e11 | 2018-02-23 14:57:20 -0800 | [diff] [blame] | 25 | #include <cutils/atomic.h> |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 26 | #include <utils/Log.h> |
| 27 | #include <utils/String8.h> |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 28 | #include <utils/threads.h> |
| 29 | |
Mathias Agopian | 208059f | 2009-05-18 15:08:03 -0700 | [diff] [blame] | 30 | #include <private/binder/binder_module.h> |
Steven Moreland | a4853cd | 2019-07-12 15:44:37 -0700 | [diff] [blame] | 31 | #include "Static.h" |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 32 | |
| 33 | #include <errno.h> |
| 34 | #include <fcntl.h> |
| 35 | #include <stdio.h> |
| 36 | #include <stdlib.h> |
| 37 | #include <unistd.h> |
| 38 | #include <sys/ioctl.h> |
| 39 | #include <sys/mman.h> |
| 40 | #include <sys/stat.h> |
Philip Cuadra | a082fa8 | 2016-04-08 10:29:14 -0700 | [diff] [blame] | 41 | #include <sys/types.h> |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 42 | |
Steven Moreland | 072cc7e | 2019-07-12 21:01:54 +0000 | [diff] [blame] | 43 | #define BINDER_VM_SIZE ((1 * 1024 * 1024) - sysconf(_SC_PAGE_SIZE) * 2) |
Wale Ogunwale | 376b822 | 2015-04-13 16:16:10 -0700 | [diff] [blame] | 44 | #define DEFAULT_MAX_BINDER_THREADS 15 |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 45 | |
Martijn Coenen | 7bca77a | 2019-03-13 11:51:08 +0000 | [diff] [blame] | 46 | #ifdef __ANDROID_VNDK__ |
| 47 | const char* kDefaultDriver = "/dev/vndbinder"; |
| 48 | #else |
Steven Moreland | 2ae2f5e | 2018-07-06 13:02:53 -0700 | [diff] [blame] | 49 | const char* kDefaultDriver = "/dev/binder"; |
Martijn Coenen | 7bca77a | 2019-03-13 11:51:08 +0000 | [diff] [blame] | 50 | #endif |
Steven Moreland | 2ae2f5e | 2018-07-06 13:02:53 -0700 | [diff] [blame] | 51 | |
Philip Cuadra | a082fa8 | 2016-04-08 10:29:14 -0700 | [diff] [blame] | 52 | // ------------------------------------------------------------------------- |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 53 | |
| 54 | namespace android { |
Wale Ogunwale | 376b822 | 2015-04-13 16:16:10 -0700 | [diff] [blame] | 55 | |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 56 | class PoolThread : public Thread |
| 57 | { |
| 58 | public: |
Chih-Hung Hsieh | e2347b7 | 2016-04-25 15:41:05 -0700 | [diff] [blame] | 59 | explicit PoolThread(bool isMain) |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 60 | : mIsMain(isMain) |
| 61 | { |
| 62 | } |
Jooyung Han | 1b228f4 | 2020-01-30 13:41:12 +0900 | [diff] [blame] | 63 | |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 64 | protected: |
| 65 | virtual bool threadLoop() |
| 66 | { |
| 67 | IPCThreadState::self()->joinThreadPool(mIsMain); |
| 68 | return false; |
| 69 | } |
Jooyung Han | 1b228f4 | 2020-01-30 13:41:12 +0900 | [diff] [blame] | 70 | |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 71 | const bool mIsMain; |
| 72 | }; |
| 73 | |
| 74 | sp<ProcessState> ProcessState::self() |
| 75 | { |
Mathias Agopian | e8db871 | 2012-04-16 19:30:56 -0700 | [diff] [blame] | 76 | Mutex::Autolock _l(gProcessMutex); |
Yi Kong | fdd8da9 | 2018-06-07 17:52:27 -0700 | [diff] [blame] | 77 | if (gProcess != nullptr) { |
Mathias Agopian | e8db871 | 2012-04-16 19:30:56 -0700 | [diff] [blame] | 78 | return gProcess; |
| 79 | } |
Steven Moreland | 072cc7e | 2019-07-12 21:01:54 +0000 | [diff] [blame] | 80 | gProcess = new ProcessState(kDefaultDriver); |
Martijn Coenen | 55d871c | 2017-03-21 15:56:40 -0700 | [diff] [blame] | 81 | return gProcess; |
| 82 | } |
| 83 | |
| 84 | sp<ProcessState> ProcessState::initWithDriver(const char* driver) |
| 85 | { |
| 86 | Mutex::Autolock _l(gProcessMutex); |
Yi Kong | fdd8da9 | 2018-06-07 17:52:27 -0700 | [diff] [blame] | 87 | if (gProcess != nullptr) { |
Iliyan Malchev | ed1ffe0 | 2017-04-14 00:34:57 -0700 | [diff] [blame] | 88 | // Allow for initWithDriver to be called repeatedly with the same |
| 89 | // driver. |
| 90 | if (!strcmp(gProcess->getDriverName().c_str(), driver)) { |
| 91 | return gProcess; |
| 92 | } |
Martijn Coenen | 55d871c | 2017-03-21 15:56:40 -0700 | [diff] [blame] | 93 | LOG_ALWAYS_FATAL("ProcessState was already initialized."); |
| 94 | } |
Steven Moreland | 376a559 | 2017-12-19 15:42:16 -0800 | [diff] [blame] | 95 | |
| 96 | if (access(driver, R_OK) == -1) { |
| 97 | ALOGE("Binder driver %s is unavailable. Using /dev/binder instead.", driver); |
| 98 | driver = "/dev/binder"; |
| 99 | } |
| 100 | |
Steven Moreland | 072cc7e | 2019-07-12 21:01:54 +0000 | [diff] [blame] | 101 | gProcess = new ProcessState(driver); |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 102 | return gProcess; |
| 103 | } |
| 104 | |
Steven Moreland | 072cc7e | 2019-07-12 21:01:54 +0000 | [diff] [blame] | 105 | sp<ProcessState> ProcessState::selfOrNull() |
| 106 | { |
Colin Cross | 9d45ccc | 2017-06-20 17:48:33 -0700 | [diff] [blame] | 107 | Mutex::Autolock _l(gProcessMutex); |
| 108 | return gProcess; |
| 109 | } |
| 110 | |
Colin Cross | 6f4f3ab | 2014-02-05 17:42:44 -0800 | [diff] [blame] | 111 | sp<IBinder> ProcessState::getContextObject(const sp<IBinder>& /*caller*/) |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 112 | { |
Steven Moreland | c709dd8 | 2019-08-05 20:30:14 -0700 | [diff] [blame] | 113 | sp<IBinder> context = getStrongProxyForHandle(0); |
| 114 | |
Steven Moreland | 8d93a71 | 2020-02-19 15:16:15 -0800 | [diff] [blame] | 115 | if (context == nullptr) { |
| 116 | ALOGW("Not able to get context object on %s.", mDriverName.c_str()); |
| 117 | } |
| 118 | |
Steven Moreland | c709dd8 | 2019-08-05 20:30:14 -0700 | [diff] [blame] | 119 | // The root object is special since we get it directly from the driver, it is never |
| 120 | // written by Parcell::writeStrongBinder. |
| 121 | internal::Stability::tryMarkCompilationUnit(context.get()); |
| 122 | |
| 123 | return context; |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 124 | } |
| 125 | |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 126 | void ProcessState::startThreadPool() |
| 127 | { |
| 128 | AutoMutex _l(mLock); |
| 129 | if (!mThreadPoolStarted) { |
| 130 | mThreadPoolStarted = true; |
| 131 | spawnPooledThread(true); |
| 132 | } |
| 133 | } |
| 134 | |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 135 | bool ProcessState::becomeContextManager(context_check_func checkFunc, void* userData) |
| 136 | { |
Steven Moreland | 4411d71 | 2019-07-12 14:02:53 -0700 | [diff] [blame] | 137 | AutoMutex _l(mLock); |
| 138 | mBinderContextCheckFunc = checkFunc; |
| 139 | mBinderContextUserData = userData; |
Jeff Brown | e16986c | 2011-07-08 18:52:57 -0700 | [diff] [blame] | 140 | |
Steven Moreland | 4411d71 | 2019-07-12 14:02:53 -0700 | [diff] [blame] | 141 | flat_binder_object obj { |
| 142 | .flags = FLAT_BINDER_FLAG_TXN_SECURITY_CTX, |
| 143 | }; |
Steven Moreland | 3085a47 | 2018-12-26 13:59:23 -0800 | [diff] [blame] | 144 | |
Steven Moreland | 4411d71 | 2019-07-12 14:02:53 -0700 | [diff] [blame] | 145 | int result = ioctl(mDriverFD, BINDER_SET_CONTEXT_MGR_EXT, &obj); |
Steven Moreland | 3085a47 | 2018-12-26 13:59:23 -0800 | [diff] [blame] | 146 | |
Steven Moreland | 4411d71 | 2019-07-12 14:02:53 -0700 | [diff] [blame] | 147 | // fallback to original method |
| 148 | if (result != 0) { |
| 149 | android_errorWriteLog(0x534e4554, "121035042"); |
Steven Moreland | 3085a47 | 2018-12-26 13:59:23 -0800 | [diff] [blame] | 150 | |
Steven Moreland | 4411d71 | 2019-07-12 14:02:53 -0700 | [diff] [blame] | 151 | int dummy = 0; |
| 152 | result = ioctl(mDriverFD, BINDER_SET_CONTEXT_MGR, &dummy); |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 153 | } |
Steven Moreland | 4411d71 | 2019-07-12 14:02:53 -0700 | [diff] [blame] | 154 | |
| 155 | if (result == -1) { |
| 156 | mBinderContextCheckFunc = nullptr; |
| 157 | mBinderContextUserData = nullptr; |
| 158 | ALOGE("Binder ioctl to become context manager failed: %s\n", strerror(errno)); |
| 159 | } |
| 160 | |
| 161 | return result == 0; |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 162 | } |
| 163 | |
Colin Cross | 9d45ccc | 2017-06-20 17:48:33 -0700 | [diff] [blame] | 164 | // Get references to userspace objects held by the kernel binder driver |
| 165 | // Writes up to count elements into buf, and returns the total number |
| 166 | // of references the kernel has, which may be larger than count. |
| 167 | // buf may be NULL if count is 0. The pointers returned by this method |
| 168 | // should only be used for debugging and not dereferenced, they may |
| 169 | // already be invalid. |
| 170 | ssize_t ProcessState::getKernelReferences(size_t buf_count, uintptr_t* buf) |
| 171 | { |
Colin Cross | 9d45ccc | 2017-06-20 17:48:33 -0700 | [diff] [blame] | 172 | binder_node_debug_info info = {}; |
| 173 | |
Yi Kong | fdd8da9 | 2018-06-07 17:52:27 -0700 | [diff] [blame] | 174 | uintptr_t* end = buf ? buf + buf_count : nullptr; |
Colin Cross | 9d45ccc | 2017-06-20 17:48:33 -0700 | [diff] [blame] | 175 | size_t count = 0; |
| 176 | |
| 177 | do { |
| 178 | status_t result = ioctl(mDriverFD, BINDER_GET_NODE_DEBUG_INFO, &info); |
| 179 | if (result < 0) { |
| 180 | return -1; |
| 181 | } |
| 182 | if (info.ptr != 0) { |
| 183 | if (buf && buf < end) |
| 184 | *buf++ = info.ptr; |
| 185 | count++; |
| 186 | if (buf && buf < end) |
| 187 | *buf++ = info.cookie; |
| 188 | count++; |
| 189 | } |
| 190 | } while (info.ptr != 0); |
| 191 | |
| 192 | return count; |
| 193 | } |
| 194 | |
Jon Spivack | 902e6fc | 2019-10-18 21:22:37 -0700 | [diff] [blame] | 195 | // Queries the driver for the current strong reference count of the node |
| 196 | // that the handle points to. Can only be used by the servicemanager. |
| 197 | // |
| 198 | // Returns -1 in case of failure, otherwise the strong reference count. |
| 199 | ssize_t ProcessState::getStrongRefCountForNodeByHandle(int32_t handle) { |
| 200 | binder_node_info_for_ref info; |
| 201 | memset(&info, 0, sizeof(binder_node_info_for_ref)); |
| 202 | |
| 203 | info.handle = handle; |
| 204 | |
| 205 | status_t result = ioctl(mDriverFD, BINDER_GET_NODE_INFO_FOR_REF, &info); |
| 206 | |
| 207 | if (result != OK) { |
| 208 | static bool logged = false; |
| 209 | if (!logged) { |
| 210 | ALOGW("Kernel does not support BINDER_GET_NODE_INFO_FOR_REF."); |
| 211 | logged = true; |
| 212 | } |
| 213 | return -1; |
| 214 | } |
| 215 | |
| 216 | return info.strong_count; |
| 217 | } |
| 218 | |
Steven Moreland | 7732a09 | 2019-01-02 17:54:16 -0800 | [diff] [blame] | 219 | void ProcessState::setCallRestriction(CallRestriction restriction) { |
Steven Moreland | 28723ae | 2019-04-01 18:52:30 -0700 | [diff] [blame] | 220 | LOG_ALWAYS_FATAL_IF(IPCThreadState::selfOrNull() != nullptr, |
| 221 | "Call restrictions must be set before the threadpool is started."); |
Steven Moreland | 7732a09 | 2019-01-02 17:54:16 -0800 | [diff] [blame] | 222 | |
| 223 | mCallRestriction = restriction; |
| 224 | } |
| 225 | |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 226 | ProcessState::handle_entry* ProcessState::lookupHandleLocked(int32_t handle) |
| 227 | { |
| 228 | const size_t N=mHandleToObject.size(); |
| 229 | if (N <= (size_t)handle) { |
| 230 | handle_entry e; |
Yi Kong | fdd8da9 | 2018-06-07 17:52:27 -0700 | [diff] [blame] | 231 | e.binder = nullptr; |
| 232 | e.refs = nullptr; |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 233 | status_t err = mHandleToObject.insertAt(e, N, handle+1-N); |
Yi Kong | fdd8da9 | 2018-06-07 17:52:27 -0700 | [diff] [blame] | 234 | if (err < NO_ERROR) return nullptr; |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 235 | } |
| 236 | return &mHandleToObject.editItemAt(handle); |
| 237 | } |
| 238 | |
| 239 | sp<IBinder> ProcessState::getStrongProxyForHandle(int32_t handle) |
| 240 | { |
| 241 | sp<IBinder> result; |
| 242 | |
| 243 | AutoMutex _l(mLock); |
| 244 | |
| 245 | handle_entry* e = lookupHandleLocked(handle); |
| 246 | |
Yi Kong | fdd8da9 | 2018-06-07 17:52:27 -0700 | [diff] [blame] | 247 | if (e != nullptr) { |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 248 | // We need to create a new BpBinder if there isn't currently one, OR we |
Steven Moreland | e171d62 | 2019-07-17 16:06:01 -0700 | [diff] [blame] | 249 | // are unable to acquire a weak reference on this current one. The |
| 250 | // attemptIncWeak() is safe because we know the BpBinder destructor will always |
| 251 | // call expungeHandle(), which acquires the same lock we are holding now. |
| 252 | // We need to do this because there is a race condition between someone |
| 253 | // releasing a reference on this BpBinder, and a new reference on its handle |
| 254 | // arriving from the driver. |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 255 | IBinder* b = e->binder; |
Yi Kong | fdd8da9 | 2018-06-07 17:52:27 -0700 | [diff] [blame] | 256 | if (b == nullptr || !e->refs->attemptIncWeak(this)) { |
Todd Poynor | a7b0f04 | 2013-06-18 17:25:37 -0700 | [diff] [blame] | 257 | if (handle == 0) { |
| 258 | // Special case for context manager... |
| 259 | // The context manager is the only object for which we create |
| 260 | // a BpBinder proxy without already holding a reference. |
| 261 | // Perform a dummy transaction to ensure the context manager |
| 262 | // is registered before we create the first local reference |
| 263 | // to it (which will occur when creating the BpBinder). |
| 264 | // If a local reference is created for the BpBinder when the |
| 265 | // context manager is not present, the driver will fail to |
| 266 | // provide a reference to the context manager, but the |
| 267 | // driver API does not return status. |
| 268 | // |
| 269 | // Note that this is not race-free if the context manager |
| 270 | // dies while this code runs. |
| 271 | // |
| 272 | // TODO: add a driver API to wait for context manager, or |
| 273 | // stop special casing handle 0 for context manager and add |
| 274 | // a driver API to get a handle to the context manager with |
| 275 | // proper reference counting. |
| 276 | |
| 277 | Parcel data; |
| 278 | status_t status = IPCThreadState::self()->transact( |
Yi Kong | fdd8da9 | 2018-06-07 17:52:27 -0700 | [diff] [blame] | 279 | 0, IBinder::PING_TRANSACTION, data, nullptr, 0); |
Todd Poynor | a7b0f04 | 2013-06-18 17:25:37 -0700 | [diff] [blame] | 280 | if (status == DEAD_OBJECT) |
Yi Kong | fdd8da9 | 2018-06-07 17:52:27 -0700 | [diff] [blame] | 281 | return nullptr; |
Todd Poynor | a7b0f04 | 2013-06-18 17:25:37 -0700 | [diff] [blame] | 282 | } |
| 283 | |
Michael Wachenschwanz | 2d34990 | 2017-08-15 00:57:14 -0700 | [diff] [blame] | 284 | b = BpBinder::create(handle); |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 285 | e->binder = b; |
| 286 | if (b) e->refs = b->getWeakRefs(); |
| 287 | result = b; |
| 288 | } else { |
| 289 | // This little bit of nastyness is to allow us to add a primary |
| 290 | // reference to the remote proxy when this team doesn't have one |
| 291 | // but another team is sending the handle to us. |
| 292 | result.force_set(b); |
| 293 | e->refs->decWeak(this); |
| 294 | } |
| 295 | } |
| 296 | |
| 297 | return result; |
| 298 | } |
| 299 | |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 300 | void ProcessState::expungeHandle(int32_t handle, IBinder* binder) |
| 301 | { |
| 302 | AutoMutex _l(mLock); |
Jooyung Han | 1b228f4 | 2020-01-30 13:41:12 +0900 | [diff] [blame] | 303 | |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 304 | handle_entry* e = lookupHandleLocked(handle); |
| 305 | |
| 306 | // This handle may have already been replaced with a new BpBinder |
| 307 | // (if someone failed the AttemptIncWeak() above); we don't want |
| 308 | // to overwrite it. |
Yi Kong | fdd8da9 | 2018-06-07 17:52:27 -0700 | [diff] [blame] | 309 | if (e && e->binder == binder) e->binder = nullptr; |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 310 | } |
| 311 | |
Mathias Agopian | e3e43b3 | 2013-03-07 15:34:28 -0800 | [diff] [blame] | 312 | String8 ProcessState::makeBinderThreadName() { |
| 313 | int32_t s = android_atomic_add(1, &mThreadPoolSeq); |
Philip Cuadra | a082fa8 | 2016-04-08 10:29:14 -0700 | [diff] [blame] | 314 | pid_t pid = getpid(); |
Mathias Agopian | e3e43b3 | 2013-03-07 15:34:28 -0800 | [diff] [blame] | 315 | String8 name; |
Philip Cuadra | a082fa8 | 2016-04-08 10:29:14 -0700 | [diff] [blame] | 316 | name.appendFormat("Binder:%d_%X", pid, s); |
Mathias Agopian | e3e43b3 | 2013-03-07 15:34:28 -0800 | [diff] [blame] | 317 | return name; |
| 318 | } |
| 319 | |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 320 | void ProcessState::spawnPooledThread(bool isMain) |
| 321 | { |
| 322 | if (mThreadPoolStarted) { |
Mathias Agopian | e3e43b3 | 2013-03-07 15:34:28 -0800 | [diff] [blame] | 323 | String8 name = makeBinderThreadName(); |
| 324 | ALOGV("Spawning new pooled thread, name=%s\n", name.string()); |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 325 | sp<Thread> t = new PoolThread(isMain); |
Mathias Agopian | e3e43b3 | 2013-03-07 15:34:28 -0800 | [diff] [blame] | 326 | t->run(name.string()); |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 327 | } |
| 328 | } |
| 329 | |
Mathias Agopian | 1b80f79 | 2012-04-17 16:11:08 -0700 | [diff] [blame] | 330 | status_t ProcessState::setThreadPoolMaxThreadCount(size_t maxThreads) { |
Steven Moreland | 1fdb98b | 2020-03-06 21:42:12 +0000 | [diff] [blame] | 331 | LOG_ALWAYS_FATAL_IF(mThreadPoolStarted && maxThreads < mMaxThreads, |
| 332 | "Binder threadpool cannot be shrunk after starting"); |
Mathias Agopian | 1b80f79 | 2012-04-17 16:11:08 -0700 | [diff] [blame] | 333 | status_t result = NO_ERROR; |
Wale Ogunwale | 376b822 | 2015-04-13 16:16:10 -0700 | [diff] [blame] | 334 | if (ioctl(mDriverFD, BINDER_SET_MAX_THREADS, &maxThreads) != -1) { |
| 335 | mMaxThreads = maxThreads; |
| 336 | } else { |
Mathias Agopian | 1b80f79 | 2012-04-17 16:11:08 -0700 | [diff] [blame] | 337 | result = -errno; |
| 338 | ALOGE("Binder ioctl to set max threads failed: %s", strerror(-result)); |
| 339 | } |
| 340 | return result; |
| 341 | } |
| 342 | |
Mathias Agopian | e3e43b3 | 2013-03-07 15:34:28 -0800 | [diff] [blame] | 343 | void ProcessState::giveThreadPoolName() { |
| 344 | androidSetThreadName( makeBinderThreadName().string() ); |
| 345 | } |
| 346 | |
Iliyan Malchev | 3206224 | 2017-04-10 14:06:11 -0700 | [diff] [blame] | 347 | String8 ProcessState::getDriverName() { |
| 348 | return mDriverName; |
| 349 | } |
| 350 | |
Martijn Coenen | 55d871c | 2017-03-21 15:56:40 -0700 | [diff] [blame] | 351 | static int open_driver(const char *driver) |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 352 | { |
Martijn Coenen | 55d871c | 2017-03-21 15:56:40 -0700 | [diff] [blame] | 353 | int fd = open(driver, O_RDWR | O_CLOEXEC); |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 354 | if (fd >= 0) { |
Jin Wei | 78181df | 2012-10-18 17:00:48 +0800 | [diff] [blame] | 355 | int vers = 0; |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 356 | status_t result = ioctl(fd, BINDER_VERSION, &vers); |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 357 | if (result == -1) { |
Steve Block | e6f43dd | 2012-01-06 19:20:56 +0000 | [diff] [blame] | 358 | ALOGE("Binder ioctl to obtain version failed: %s", strerror(errno)); |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 359 | close(fd); |
| 360 | fd = -1; |
| 361 | } |
| 362 | if (result != 0 || vers != BINDER_CURRENT_PROTOCOL_VERSION) { |
Greg Hartman | 67ac00f | 2017-01-03 16:54:59 -0800 | [diff] [blame] | 363 | ALOGE("Binder driver protocol(%d) does not match user space protocol(%d)! ioctl() return value: %d", |
| 364 | vers, BINDER_CURRENT_PROTOCOL_VERSION, result); |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 365 | close(fd); |
| 366 | fd = -1; |
| 367 | } |
Wale Ogunwale | 376b822 | 2015-04-13 16:16:10 -0700 | [diff] [blame] | 368 | size_t maxThreads = DEFAULT_MAX_BINDER_THREADS; |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 369 | result = ioctl(fd, BINDER_SET_MAX_THREADS, &maxThreads); |
| 370 | if (result == -1) { |
Steve Block | e6f43dd | 2012-01-06 19:20:56 +0000 | [diff] [blame] | 371 | ALOGE("Binder ioctl to set max threads failed: %s", strerror(errno)); |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 372 | } |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 373 | } else { |
Martijn Coenen | 55d871c | 2017-03-21 15:56:40 -0700 | [diff] [blame] | 374 | ALOGW("Opening '%s' failed: %s\n", driver, strerror(errno)); |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 375 | } |
| 376 | return fd; |
| 377 | } |
| 378 | |
Steven Moreland | 072cc7e | 2019-07-12 21:01:54 +0000 | [diff] [blame] | 379 | ProcessState::ProcessState(const char *driver) |
Iliyan Malchev | 3206224 | 2017-04-10 14:06:11 -0700 | [diff] [blame] | 380 | : mDriverName(String8(driver)) |
| 381 | , mDriverFD(open_driver(driver)) |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 382 | , mVMStart(MAP_FAILED) |
Wale Ogunwale | 376b822 | 2015-04-13 16:16:10 -0700 | [diff] [blame] | 383 | , mThreadCountLock(PTHREAD_MUTEX_INITIALIZER) |
| 384 | , mThreadCountDecrement(PTHREAD_COND_INITIALIZER) |
| 385 | , mExecutingThreadsCount(0) |
| 386 | , mMaxThreads(DEFAULT_MAX_BINDER_THREADS) |
Colin Cross | 96e8322 | 2016-04-15 14:29:55 -0700 | [diff] [blame] | 387 | , mStarvationStartTimeMs(0) |
Yi Kong | fdd8da9 | 2018-06-07 17:52:27 -0700 | [diff] [blame] | 388 | , mBinderContextCheckFunc(nullptr) |
| 389 | , mBinderContextUserData(nullptr) |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 390 | , mThreadPoolStarted(false) |
| 391 | , mThreadPoolSeq(1) |
Steven Moreland | 7732a09 | 2019-01-02 17:54:16 -0800 | [diff] [blame] | 392 | , mCallRestriction(CallRestriction::NONE) |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 393 | { |
Steven Moreland | b6d0e76 | 2019-11-15 00:51:42 -0800 | [diff] [blame] | 394 | |
| 395 | // TODO(b/139016109): enforce in build system |
Jooyung Han | 1b228f4 | 2020-01-30 13:41:12 +0900 | [diff] [blame] | 396 | #if defined(__ANDROID_APEX__) |
Steven Moreland | b6d0e76 | 2019-11-15 00:51:42 -0800 | [diff] [blame] | 397 | LOG_ALWAYS_FATAL("Cannot use libbinder in APEX (only system.img libbinder) since it is not stable."); |
| 398 | #endif |
| 399 | |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 400 | if (mDriverFD >= 0) { |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 401 | // mmap the binder, providing a chunk of virtual address space to receive transactions. |
Steven Moreland | 072cc7e | 2019-07-12 21:01:54 +0000 | [diff] [blame] | 402 | mVMStart = mmap(nullptr, BINDER_VM_SIZE, PROT_READ, MAP_PRIVATE | MAP_NORESERVE, mDriverFD, 0); |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 403 | if (mVMStart == MAP_FAILED) { |
| 404 | // *sigh* |
Steven Moreland | 376a559 | 2017-12-19 15:42:16 -0800 | [diff] [blame] | 405 | ALOGE("Using %s failed: unable to mmap transaction memory.\n", mDriverName.c_str()); |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 406 | close(mDriverFD); |
| 407 | mDriverFD = -1; |
Iliyan Malchev | 3206224 | 2017-04-10 14:06:11 -0700 | [diff] [blame] | 408 | mDriverName.clear(); |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 409 | } |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 410 | } |
Jeff Brown | e16986c | 2011-07-08 18:52:57 -0700 | [diff] [blame] | 411 | |
Steven Moreland | 8c78e2e | 2019-07-10 16:13:12 -0700 | [diff] [blame] | 412 | LOG_ALWAYS_FATAL_IF(mDriverFD < 0, "Binder driver '%s' could not be opened. Terminating.", driver); |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 413 | } |
| 414 | |
| 415 | ProcessState::~ProcessState() |
| 416 | { |
zhongjie | ff40578 | 2016-03-09 15:05:04 +0800 | [diff] [blame] | 417 | if (mDriverFD >= 0) { |
| 418 | if (mVMStart != MAP_FAILED) { |
Steven Moreland | 072cc7e | 2019-07-12 21:01:54 +0000 | [diff] [blame] | 419 | munmap(mVMStart, BINDER_VM_SIZE); |
zhongjie | ff40578 | 2016-03-09 15:05:04 +0800 | [diff] [blame] | 420 | } |
| 421 | close(mDriverFD); |
| 422 | } |
| 423 | mDriverFD = -1; |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 424 | } |
Jooyung Han | 1b228f4 | 2020-01-30 13:41:12 +0900 | [diff] [blame] | 425 | |
Steven Moreland | 61ff849 | 2019-09-26 16:05:45 -0700 | [diff] [blame] | 426 | } // namespace android |