Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2017 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 | #include <array> |
| 18 | |
| 19 | #include "adbconnection.h" |
| 20 | |
| 21 | #include "android-base/endian.h" |
| 22 | #include "android-base/stringprintf.h" |
Andreas Gampe | dfcd82c | 2018-10-16 20:22:37 -0700 | [diff] [blame] | 23 | #include "base/file_utils.h" |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 24 | #include "base/logging.h" |
| 25 | #include "base/macros.h" |
| 26 | #include "base/mutex.h" |
Elliott Hughes | c2efd4d | 2018-10-25 13:14:55 -0700 | [diff] [blame] | 27 | #include "base/socket_peer_is_trusted.h" |
Vladimir Marko | a3ad0cd | 2018-05-04 10:06:38 +0100 | [diff] [blame] | 28 | #include "jni/java_vm_ext.h" |
| 29 | #include "jni/jni_env_ext.h" |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 30 | #include "mirror/throwable.h" |
Orion Hodson | d41c759 | 2019-01-27 09:25:47 +0000 | [diff] [blame] | 31 | #include "nativehelper/scoped_local_ref.h" |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 32 | #include "runtime-inl.h" |
| 33 | #include "runtime_callbacks.h" |
| 34 | #include "scoped_thread_state_change-inl.h" |
| 35 | #include "well_known_classes.h" |
| 36 | |
| 37 | #include "jdwp/jdwp_priv.h" |
| 38 | |
| 39 | #include "fd_transport.h" |
| 40 | |
| 41 | #include "poll.h" |
| 42 | |
Alex Light | 15b8113 | 2018-01-24 13:29:07 -0800 | [diff] [blame] | 43 | #include <sys/ioctl.h> |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 44 | #include <sys/socket.h> |
| 45 | #include <sys/un.h> |
| 46 | #include <sys/eventfd.h> |
| 47 | #include <jni.h> |
| 48 | |
| 49 | namespace adbconnection { |
| 50 | |
Alex Light | 15b8113 | 2018-01-24 13:29:07 -0800 | [diff] [blame] | 51 | // Messages sent from the transport |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 52 | using dt_fd_forward::kListenStartMessage; |
| 53 | using dt_fd_forward::kListenEndMessage; |
| 54 | using dt_fd_forward::kAcceptMessage; |
| 55 | using dt_fd_forward::kCloseMessage; |
| 56 | |
Alex Light | 15b8113 | 2018-01-24 13:29:07 -0800 | [diff] [blame] | 57 | // Messages sent to the transport |
| 58 | using dt_fd_forward::kPerformHandshakeMessage; |
| 59 | using dt_fd_forward::kSkipHandshakeMessage; |
| 60 | |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 61 | using android::base::StringPrintf; |
| 62 | |
Alex Light | 15b8113 | 2018-01-24 13:29:07 -0800 | [diff] [blame] | 63 | static constexpr const char kJdwpHandshake[14] = { |
| 64 | 'J', 'D', 'W', 'P', '-', 'H', 'a', 'n', 'd', 's', 'h', 'a', 'k', 'e' |
| 65 | }; |
| 66 | |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 67 | static constexpr int kEventfdLocked = 0; |
| 68 | static constexpr int kEventfdUnlocked = 1; |
| 69 | static constexpr int kControlSockSendTimeout = 10; |
| 70 | |
Alex Light | 15b8113 | 2018-01-24 13:29:07 -0800 | [diff] [blame] | 71 | static constexpr size_t kPacketHeaderLen = 11; |
| 72 | static constexpr off_t kPacketSizeOff = 0; |
| 73 | static constexpr off_t kPacketIdOff = 4; |
| 74 | static constexpr off_t kPacketCommandSetOff = 9; |
| 75 | static constexpr off_t kPacketCommandOff = 10; |
| 76 | |
| 77 | static constexpr uint8_t kDdmCommandSet = 199; |
| 78 | static constexpr uint8_t kDdmChunkCommand = 1; |
| 79 | |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 80 | static AdbConnectionState* gState; |
| 81 | |
| 82 | static bool IsDebuggingPossible() { |
Alex Light | 2ce6fc8 | 2017-12-18 16:42:36 -0800 | [diff] [blame] | 83 | return art::Dbg::IsJdwpAllowed(); |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 84 | } |
| 85 | |
| 86 | // Begin running the debugger. |
| 87 | void AdbConnectionDebuggerController::StartDebugger() { |
| 88 | if (IsDebuggingPossible()) { |
| 89 | connection_->StartDebuggerThreads(); |
| 90 | } else { |
| 91 | LOG(ERROR) << "Not starting debugger since process cannot load the jdwp agent."; |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | // The debugger should begin shutting down since the runtime is ending. We don't actually do |
| 96 | // anything here. The real shutdown has already happened as far as the agent is concerned. |
| 97 | void AdbConnectionDebuggerController::StopDebugger() { } |
| 98 | |
| 99 | bool AdbConnectionDebuggerController::IsDebuggerConfigured() { |
| 100 | return IsDebuggingPossible() && !art::Runtime::Current()->GetJdwpOptions().empty(); |
| 101 | } |
| 102 | |
| 103 | void AdbConnectionDdmCallback::DdmPublishChunk(uint32_t type, |
| 104 | const art::ArrayRef<const uint8_t>& data) { |
| 105 | connection_->PublishDdmData(type, data); |
| 106 | } |
| 107 | |
| 108 | class ScopedEventFdLock { |
| 109 | public: |
| 110 | explicit ScopedEventFdLock(int fd) : fd_(fd), data_(0) { |
| 111 | TEMP_FAILURE_RETRY(read(fd_, &data_, sizeof(data_))); |
| 112 | } |
| 113 | |
| 114 | ~ScopedEventFdLock() { |
| 115 | TEMP_FAILURE_RETRY(write(fd_, &data_, sizeof(data_))); |
| 116 | } |
| 117 | |
| 118 | private: |
| 119 | int fd_; |
| 120 | uint64_t data_; |
| 121 | }; |
| 122 | |
| 123 | AdbConnectionState::AdbConnectionState(const std::string& agent_name) |
| 124 | : agent_name_(agent_name), |
| 125 | controller_(this), |
| 126 | ddm_callback_(this), |
| 127 | sleep_event_fd_(-1), |
| 128 | control_sock_(-1), |
| 129 | local_agent_control_sock_(-1), |
| 130 | remote_agent_control_sock_(-1), |
| 131 | adb_connection_socket_(-1), |
| 132 | adb_write_event_fd_(-1), |
| 133 | shutting_down_(false), |
| 134 | agent_loaded_(false), |
| 135 | agent_listening_(false), |
Alex Light | 15b8113 | 2018-01-24 13:29:07 -0800 | [diff] [blame] | 136 | agent_has_socket_(false), |
| 137 | sent_agent_fds_(false), |
| 138 | performed_handshake_(false), |
| 139 | notified_ddm_active_(false), |
Alex Light | d6f9d85 | 2018-01-25 11:26:28 -0800 | [diff] [blame] | 140 | next_ddm_id_(1), |
| 141 | started_debugger_threads_(false) { |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 142 | // Setup the addr. |
| 143 | control_addr_.controlAddrUn.sun_family = AF_UNIX; |
| 144 | control_addr_len_ = sizeof(control_addr_.controlAddrUn.sun_family) + sizeof(kJdwpControlName) - 1; |
| 145 | memcpy(control_addr_.controlAddrUn.sun_path, kJdwpControlName, sizeof(kJdwpControlName) - 1); |
| 146 | |
| 147 | // Add the startup callback. |
| 148 | art::ScopedObjectAccess soa(art::Thread::Current()); |
| 149 | art::Runtime::Current()->GetRuntimeCallbacks()->AddDebuggerControlCallback(&controller_); |
| 150 | } |
| 151 | |
| 152 | static jobject CreateAdbConnectionThread(art::Thread* thr) { |
| 153 | JNIEnv* env = thr->GetJniEnv(); |
| 154 | // Move to native state to talk with the jnienv api. |
| 155 | art::ScopedThreadStateChange stsc(thr, art::kNative); |
| 156 | ScopedLocalRef<jstring> thr_name(env, env->NewStringUTF(kAdbConnectionThreadName)); |
| 157 | ScopedLocalRef<jobject> thr_group( |
| 158 | env, |
| 159 | env->GetStaticObjectField(art::WellKnownClasses::java_lang_ThreadGroup, |
| 160 | art::WellKnownClasses::java_lang_ThreadGroup_systemThreadGroup)); |
| 161 | return env->NewObject(art::WellKnownClasses::java_lang_Thread, |
| 162 | art::WellKnownClasses::java_lang_Thread_init, |
| 163 | thr_group.get(), |
| 164 | thr_name.get(), |
Andreas Gampe | 9b031f7 | 2018-10-04 11:03:34 -0700 | [diff] [blame] | 165 | /*Priority=*/ 0, |
| 166 | /*Daemon=*/ true); |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 167 | } |
| 168 | |
| 169 | struct CallbackData { |
| 170 | AdbConnectionState* this_; |
| 171 | jobject thr_; |
| 172 | }; |
| 173 | |
| 174 | static void* CallbackFunction(void* vdata) { |
| 175 | std::unique_ptr<CallbackData> data(reinterpret_cast<CallbackData*>(vdata)); |
Alex Light | d6f9d85 | 2018-01-25 11:26:28 -0800 | [diff] [blame] | 176 | CHECK(data->this_ == gState); |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 177 | art::Thread* self = art::Thread::Attach(kAdbConnectionThreadName, |
| 178 | true, |
| 179 | data->thr_); |
| 180 | CHECK(self != nullptr) << "threads_being_born_ should have ensured thread could be attached."; |
| 181 | // The name in Attach() is only for logging. Set the thread name. This is important so |
| 182 | // that the thread is no longer seen as starting up. |
| 183 | { |
| 184 | art::ScopedObjectAccess soa(self); |
| 185 | self->SetThreadName(kAdbConnectionThreadName); |
| 186 | } |
| 187 | |
| 188 | // Release the peer. |
| 189 | JNIEnv* env = self->GetJniEnv(); |
| 190 | env->DeleteGlobalRef(data->thr_); |
| 191 | data->thr_ = nullptr; |
| 192 | { |
| 193 | // The StartThreadBirth was called in the parent thread. We let the runtime know we are up |
| 194 | // before going into the provided code. |
| 195 | art::MutexLock mu(self, *art::Locks::runtime_shutdown_lock_); |
| 196 | art::Runtime::Current()->EndThreadBirth(); |
| 197 | } |
| 198 | data->this_->RunPollLoop(self); |
| 199 | int detach_result = art::Runtime::Current()->GetJavaVM()->DetachCurrentThread(); |
| 200 | CHECK_EQ(detach_result, 0); |
| 201 | |
Alex Light | d6f9d85 | 2018-01-25 11:26:28 -0800 | [diff] [blame] | 202 | // Get rid of the connection |
| 203 | gState = nullptr; |
| 204 | delete data->this_; |
| 205 | |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 206 | return nullptr; |
| 207 | } |
| 208 | |
| 209 | void AdbConnectionState::StartDebuggerThreads() { |
| 210 | // First do all the final setup we need. |
| 211 | CHECK_EQ(adb_write_event_fd_.get(), -1); |
| 212 | CHECK_EQ(sleep_event_fd_.get(), -1); |
| 213 | CHECK_EQ(local_agent_control_sock_.get(), -1); |
| 214 | CHECK_EQ(remote_agent_control_sock_.get(), -1); |
| 215 | |
| 216 | sleep_event_fd_.reset(eventfd(kEventfdLocked, EFD_CLOEXEC)); |
| 217 | CHECK_NE(sleep_event_fd_.get(), -1) << "Unable to create wakeup eventfd."; |
| 218 | adb_write_event_fd_.reset(eventfd(kEventfdUnlocked, EFD_CLOEXEC)); |
| 219 | CHECK_NE(adb_write_event_fd_.get(), -1) << "Unable to create write-lock eventfd."; |
| 220 | |
| 221 | { |
| 222 | art::ScopedObjectAccess soa(art::Thread::Current()); |
| 223 | art::Runtime::Current()->GetRuntimeCallbacks()->AddDdmCallback(&ddm_callback_); |
| 224 | } |
| 225 | // Setup the socketpair we use to talk to the agent. |
| 226 | bool has_sockets; |
| 227 | do { |
| 228 | has_sockets = android::base::Socketpair(AF_UNIX, |
| 229 | SOCK_SEQPACKET | SOCK_CLOEXEC, |
| 230 | 0, |
| 231 | &local_agent_control_sock_, |
| 232 | &remote_agent_control_sock_); |
| 233 | } while (!has_sockets && errno == EINTR); |
| 234 | if (!has_sockets) { |
| 235 | PLOG(FATAL) << "Unable to create socketpair for agent control!"; |
| 236 | } |
| 237 | |
| 238 | // Next start the threads. |
| 239 | art::Thread* self = art::Thread::Current(); |
| 240 | art::ScopedObjectAccess soa(self); |
| 241 | { |
| 242 | art::Runtime* runtime = art::Runtime::Current(); |
| 243 | art::MutexLock mu(self, *art::Locks::runtime_shutdown_lock_); |
| 244 | if (runtime->IsShuttingDownLocked()) { |
| 245 | // The runtime is shutting down so we cannot create new threads. This shouldn't really happen. |
| 246 | LOG(ERROR) << "The runtime is shutting down when we are trying to start up the debugger!"; |
| 247 | return; |
| 248 | } |
| 249 | runtime->StartThreadBirth(); |
| 250 | } |
| 251 | ScopedLocalRef<jobject> thr(soa.Env(), CreateAdbConnectionThread(soa.Self())); |
Andreas Gampe | afaf7f8 | 2018-10-16 11:32:38 -0700 | [diff] [blame] | 252 | // Note: Using pthreads instead of std::thread to not abort when the thread cannot be |
| 253 | // created (exception support required). |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 254 | pthread_t pthread; |
| 255 | std::unique_ptr<CallbackData> data(new CallbackData { this, soa.Env()->NewGlobalRef(thr.get()) }); |
Alex Light | d6f9d85 | 2018-01-25 11:26:28 -0800 | [diff] [blame] | 256 | started_debugger_threads_ = true; |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 257 | int pthread_create_result = pthread_create(&pthread, |
| 258 | nullptr, |
| 259 | &CallbackFunction, |
| 260 | data.get()); |
| 261 | if (pthread_create_result != 0) { |
Alex Light | d6f9d85 | 2018-01-25 11:26:28 -0800 | [diff] [blame] | 262 | started_debugger_threads_ = false; |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 263 | // If the create succeeded the other thread will call EndThreadBirth. |
| 264 | art::Runtime* runtime = art::Runtime::Current(); |
| 265 | soa.Env()->DeleteGlobalRef(data->thr_); |
| 266 | LOG(ERROR) << "Failed to create thread for adb-jdwp connection manager!"; |
| 267 | art::MutexLock mu(art::Thread::Current(), *art::Locks::runtime_shutdown_lock_); |
| 268 | runtime->EndThreadBirth(); |
| 269 | return; |
| 270 | } |
Andreas Gampe | afaf7f8 | 2018-10-16 11:32:38 -0700 | [diff] [blame] | 271 | data.release(); // NOLINT pthreads API. |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 272 | } |
| 273 | |
| 274 | static bool FlagsSet(int16_t data, int16_t flags) { |
| 275 | return (data & flags) == flags; |
| 276 | } |
| 277 | |
| 278 | void AdbConnectionState::CloseFds() { |
Alex Light | 15b8113 | 2018-01-24 13:29:07 -0800 | [diff] [blame] | 279 | { |
| 280 | // Lock the write_event_fd so that concurrent PublishDdms will see that the connection is |
| 281 | // closed. |
| 282 | ScopedEventFdLock lk(adb_write_event_fd_); |
| 283 | // shutdown(adb_connection_socket_, SHUT_RDWR); |
| 284 | adb_connection_socket_.reset(); |
| 285 | } |
| 286 | |
| 287 | // If we didn't load anything we will need to do the handshake again. |
| 288 | performed_handshake_ = false; |
| 289 | |
| 290 | // If the agent isn't loaded we might need to tell ddms code the connection is closed. |
| 291 | if (!agent_loaded_ && notified_ddm_active_) { |
Andreas Gampe | 9b031f7 | 2018-10-04 11:03:34 -0700 | [diff] [blame] | 292 | NotifyDdms(/*active=*/false); |
Alex Light | 15b8113 | 2018-01-24 13:29:07 -0800 | [diff] [blame] | 293 | } |
| 294 | } |
| 295 | |
| 296 | void AdbConnectionState::NotifyDdms(bool active) { |
| 297 | art::ScopedObjectAccess soa(art::Thread::Current()); |
| 298 | DCHECK_NE(notified_ddm_active_, active); |
| 299 | notified_ddm_active_ = active; |
| 300 | if (active) { |
| 301 | art::Dbg::DdmConnected(); |
| 302 | } else { |
| 303 | art::Dbg::DdmDisconnected(); |
| 304 | } |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 305 | } |
| 306 | |
| 307 | uint32_t AdbConnectionState::NextDdmId() { |
| 308 | // Just have a normal counter but always set the sign bit. |
| 309 | return (next_ddm_id_++) | 0x80000000; |
| 310 | } |
| 311 | |
| 312 | void AdbConnectionState::PublishDdmData(uint32_t type, const art::ArrayRef<const uint8_t>& data) { |
Alex Light | 15b8113 | 2018-01-24 13:29:07 -0800 | [diff] [blame] | 313 | SendDdmPacket(NextDdmId(), DdmPacketType::kCmd, type, data); |
| 314 | } |
| 315 | |
| 316 | void AdbConnectionState::SendDdmPacket(uint32_t id, |
| 317 | DdmPacketType packet_type, |
| 318 | uint32_t type, |
| 319 | art::ArrayRef<const uint8_t> data) { |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 320 | // Get the write_event early to fail fast. |
| 321 | ScopedEventFdLock lk(adb_write_event_fd_); |
| 322 | if (adb_connection_socket_ == -1) { |
Alex Light | a17cc2e | 2018-02-02 13:56:14 -0800 | [diff] [blame] | 323 | VLOG(jdwp) << "Not sending ddms data of type " |
| 324 | << StringPrintf("%c%c%c%c", |
| 325 | static_cast<char>(type >> 24), |
| 326 | static_cast<char>(type >> 16), |
| 327 | static_cast<char>(type >> 8), |
| 328 | static_cast<char>(type)) << " due to no connection!"; |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 329 | // Adb is not connected. |
| 330 | return; |
| 331 | } |
| 332 | |
| 333 | // the adb_write_event_fd_ will ensure that the adb_connection_socket_ will not go away until |
| 334 | // after we have sent our data. |
| 335 | static constexpr uint32_t kDdmPacketHeaderSize = |
| 336 | kJDWPHeaderLen // jdwp command packet size |
| 337 | + sizeof(uint32_t) // Type |
| 338 | + sizeof(uint32_t); // length |
Alex Light | 15b8113 | 2018-01-24 13:29:07 -0800 | [diff] [blame] | 339 | alignas(sizeof(uint32_t)) std::array<uint8_t, kDdmPacketHeaderSize> pkt; |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 340 | uint8_t* pkt_data = pkt.data(); |
| 341 | |
| 342 | // Write the length first. |
| 343 | *reinterpret_cast<uint32_t*>(pkt_data) = htonl(kDdmPacketHeaderSize + data.size()); |
| 344 | pkt_data += sizeof(uint32_t); |
| 345 | |
| 346 | // Write the id next; |
Alex Light | 15b8113 | 2018-01-24 13:29:07 -0800 | [diff] [blame] | 347 | *reinterpret_cast<uint32_t*>(pkt_data) = htonl(id); |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 348 | pkt_data += sizeof(uint32_t); |
| 349 | |
| 350 | // next the flags. (0 for cmd packet because DDMS). |
Alex Light | 15b8113 | 2018-01-24 13:29:07 -0800 | [diff] [blame] | 351 | *(pkt_data++) = static_cast<uint8_t>(packet_type); |
| 352 | switch (packet_type) { |
| 353 | case DdmPacketType::kCmd: { |
| 354 | // Now the cmd-set |
| 355 | *(pkt_data++) = kJDWPDdmCmdSet; |
| 356 | // Now the command |
| 357 | *(pkt_data++) = kJDWPDdmCmd; |
| 358 | break; |
| 359 | } |
| 360 | case DdmPacketType::kReply: { |
| 361 | // This is the error code bytes which are all 0 |
| 362 | *(pkt_data++) = 0; |
| 363 | *(pkt_data++) = 0; |
| 364 | } |
| 365 | } |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 366 | |
Alex Light | 15b8113 | 2018-01-24 13:29:07 -0800 | [diff] [blame] | 367 | // These are at unaligned addresses so we need to do them manually. |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 368 | // now the type. |
Alex Light | 15b8113 | 2018-01-24 13:29:07 -0800 | [diff] [blame] | 369 | uint32_t net_type = htonl(type); |
| 370 | memcpy(pkt_data, &net_type, sizeof(net_type)); |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 371 | pkt_data += sizeof(uint32_t); |
| 372 | |
| 373 | // Now the data.size() |
Alex Light | 15b8113 | 2018-01-24 13:29:07 -0800 | [diff] [blame] | 374 | uint32_t net_len = htonl(data.size()); |
| 375 | memcpy(pkt_data, &net_len, sizeof(net_len)); |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 376 | pkt_data += sizeof(uint32_t); |
| 377 | |
| 378 | static uint32_t constexpr kIovSize = 2; |
| 379 | struct iovec iovs[kIovSize] = { |
| 380 | { pkt.data(), pkt.size() }, |
| 381 | { const_cast<uint8_t*>(data.data()), data.size() }, |
| 382 | }; |
| 383 | // now pkt_header has the header. |
| 384 | // use writev to send the actual data. |
| 385 | ssize_t res = TEMP_FAILURE_RETRY(writev(adb_connection_socket_, iovs, kIovSize)); |
| 386 | if (static_cast<size_t>(res) != (kDdmPacketHeaderSize + data.size())) { |
| 387 | PLOG(ERROR) << StringPrintf("Failed to send DDMS packet %c%c%c%c to debugger (%zd of %zu)", |
| 388 | static_cast<char>(type >> 24), |
| 389 | static_cast<char>(type >> 16), |
| 390 | static_cast<char>(type >> 8), |
| 391 | static_cast<char>(type), |
| 392 | res, data.size() + kDdmPacketHeaderSize); |
| 393 | } else { |
| 394 | VLOG(jdwp) << StringPrintf("sent DDMS packet %c%c%c%c to debugger %zu", |
| 395 | static_cast<char>(type >> 24), |
| 396 | static_cast<char>(type >> 16), |
| 397 | static_cast<char>(type >> 8), |
| 398 | static_cast<char>(type), |
| 399 | data.size() + kDdmPacketHeaderSize); |
| 400 | } |
| 401 | } |
| 402 | |
Alex Light | 15b8113 | 2018-01-24 13:29:07 -0800 | [diff] [blame] | 403 | void AdbConnectionState::SendAgentFds(bool require_handshake) { |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 404 | DCHECK(!sent_agent_fds_); |
Alex Light | 15b8113 | 2018-01-24 13:29:07 -0800 | [diff] [blame] | 405 | const char* message = require_handshake ? kPerformHandshakeMessage : kSkipHandshakeMessage; |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 406 | union { |
| 407 | cmsghdr cm; |
| 408 | char buffer[CMSG_SPACE(dt_fd_forward::FdSet::kDataLength)]; |
| 409 | } cm_un; |
| 410 | iovec iov; |
Alex Light | 15b8113 | 2018-01-24 13:29:07 -0800 | [diff] [blame] | 411 | iov.iov_base = const_cast<char*>(message); |
| 412 | iov.iov_len = strlen(message) + 1; |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 413 | |
| 414 | msghdr msg; |
| 415 | msg.msg_name = nullptr; |
| 416 | msg.msg_namelen = 0; |
| 417 | msg.msg_iov = &iov; |
| 418 | msg.msg_iovlen = 1; |
| 419 | msg.msg_flags = 0; |
| 420 | msg.msg_control = cm_un.buffer; |
| 421 | msg.msg_controllen = sizeof(cm_un.buffer); |
| 422 | |
| 423 | cmsghdr* cmsg = CMSG_FIRSTHDR(&msg); |
| 424 | cmsg->cmsg_len = CMSG_LEN(dt_fd_forward::FdSet::kDataLength); |
| 425 | cmsg->cmsg_level = SOL_SOCKET; |
| 426 | cmsg->cmsg_type = SCM_RIGHTS; |
| 427 | |
| 428 | // Duplicate the fds before sending them. |
Andreas Gampe | dfcd82c | 2018-10-16 20:22:37 -0700 | [diff] [blame] | 429 | android::base::unique_fd read_fd(art::DupCloexec(adb_connection_socket_)); |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 430 | CHECK_NE(read_fd.get(), -1) << "Failed to dup read_fd_: " << strerror(errno); |
Andreas Gampe | dfcd82c | 2018-10-16 20:22:37 -0700 | [diff] [blame] | 431 | android::base::unique_fd write_fd(art::DupCloexec(adb_connection_socket_)); |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 432 | CHECK_NE(write_fd.get(), -1) << "Failed to dup write_fd: " << strerror(errno); |
Andreas Gampe | dfcd82c | 2018-10-16 20:22:37 -0700 | [diff] [blame] | 433 | android::base::unique_fd write_lock_fd(art::DupCloexec(adb_write_event_fd_)); |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 434 | CHECK_NE(write_lock_fd.get(), -1) << "Failed to dup write_lock_fd: " << strerror(errno); |
| 435 | |
| 436 | dt_fd_forward::FdSet { |
| 437 | read_fd.get(), write_fd.get(), write_lock_fd.get() |
| 438 | }.WriteData(CMSG_DATA(cmsg)); |
| 439 | |
| 440 | int res = TEMP_FAILURE_RETRY(sendmsg(local_agent_control_sock_, &msg, MSG_EOR)); |
| 441 | if (res < 0) { |
| 442 | PLOG(ERROR) << "Failed to send agent adb connection fds."; |
| 443 | } else { |
| 444 | sent_agent_fds_ = true; |
| 445 | VLOG(jdwp) << "Fds have been sent to jdwp agent!"; |
| 446 | } |
| 447 | } |
| 448 | |
| 449 | android::base::unique_fd AdbConnectionState::ReadFdFromAdb() { |
| 450 | // We don't actually care about the data that is sent. We do need to receive something though. |
| 451 | char dummy = '!'; |
| 452 | union { |
| 453 | cmsghdr cm; |
| 454 | char buffer[CMSG_SPACE(sizeof(int))]; |
| 455 | } cm_un; |
| 456 | |
| 457 | iovec iov; |
| 458 | iov.iov_base = &dummy; |
| 459 | iov.iov_len = 1; |
| 460 | |
| 461 | msghdr msg; |
| 462 | msg.msg_name = nullptr; |
| 463 | msg.msg_namelen = 0; |
| 464 | msg.msg_iov = &iov; |
| 465 | msg.msg_iovlen = 1; |
| 466 | msg.msg_flags = 0; |
| 467 | msg.msg_control = cm_un.buffer; |
| 468 | msg.msg_controllen = sizeof(cm_un.buffer); |
| 469 | |
| 470 | cmsghdr* cmsg = CMSG_FIRSTHDR(&msg); |
| 471 | cmsg->cmsg_len = msg.msg_controllen; |
| 472 | cmsg->cmsg_level = SOL_SOCKET; |
| 473 | cmsg->cmsg_type = SCM_RIGHTS; |
| 474 | (reinterpret_cast<int*>(CMSG_DATA(cmsg)))[0] = -1; |
| 475 | |
| 476 | int rc = TEMP_FAILURE_RETRY(recvmsg(control_sock_, &msg, 0)); |
| 477 | |
| 478 | if (rc <= 0) { |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 479 | return android::base::unique_fd(-1); |
| 480 | } else { |
| 481 | VLOG(jdwp) << "Fds have been received from ADB!"; |
| 482 | } |
| 483 | |
| 484 | return android::base::unique_fd((reinterpret_cast<int*>(CMSG_DATA(cmsg)))[0]); |
| 485 | } |
| 486 | |
| 487 | bool AdbConnectionState::SetupAdbConnection() { |
| 488 | int sleep_ms = 500; |
| 489 | const int sleep_max_ms = 2*1000; |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 490 | |
Alex Light | 54f535a | 2018-06-04 14:14:19 -0700 | [diff] [blame] | 491 | android::base::unique_fd sock(socket(AF_UNIX, SOCK_SEQPACKET | SOCK_CLOEXEC, 0)); |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 492 | if (sock < 0) { |
| 493 | PLOG(ERROR) << "Could not create ADB control socket"; |
| 494 | return false; |
| 495 | } |
| 496 | struct timeval timeout; |
| 497 | timeout.tv_sec = kControlSockSendTimeout; |
| 498 | timeout.tv_usec = 0; |
| 499 | setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, &timeout, sizeof(timeout)); |
Josh Gao | 4b49bb7 | 2018-02-12 15:06:42 -0800 | [diff] [blame] | 500 | int32_t pid = getpid(); |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 501 | |
| 502 | while (!shutting_down_) { |
| 503 | // If adbd isn't running, because USB debugging was disabled or |
| 504 | // perhaps the system is restarting it for "adb root", the |
| 505 | // connect() will fail. We loop here forever waiting for it |
| 506 | // to come back. |
| 507 | // |
| 508 | // Waking up and polling every couple of seconds is generally a |
| 509 | // bad thing to do, but we only do this if the application is |
| 510 | // debuggable *and* adbd isn't running. Still, for the sake |
| 511 | // of battery life, we should consider timing out and giving |
| 512 | // up after a few minutes in case somebody ships an app with |
| 513 | // the debuggable flag set. |
| 514 | int ret = connect(sock, &control_addr_.controlAddrPlain, control_addr_len_); |
| 515 | if (ret == 0) { |
Elliott Hughes | c2efd4d | 2018-10-25 13:14:55 -0700 | [diff] [blame] | 516 | bool trusted = sock >= 0 && art::SocketPeerIsTrusted(sock); |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 517 | if (!trusted) { |
| 518 | LOG(ERROR) << "adb socket is not trusted. Aborting connection."; |
| 519 | if (sock >= 0 && shutdown(sock, SHUT_RDWR)) { |
| 520 | PLOG(ERROR) << "trouble shutting down socket"; |
| 521 | } |
| 522 | return false; |
| 523 | } |
| 524 | /* now try to send our pid to the ADB daemon */ |
Josh Gao | 4b49bb7 | 2018-02-12 15:06:42 -0800 | [diff] [blame] | 525 | ret = TEMP_FAILURE_RETRY(send(sock, &pid, sizeof(pid), 0)); |
| 526 | if (ret == sizeof(pid)) { |
| 527 | VLOG(jdwp) << "PID " << pid << " sent to adb"; |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 528 | control_sock_ = std::move(sock); |
| 529 | return true; |
| 530 | } else { |
| 531 | PLOG(ERROR) << "Weird, can't send JDWP process pid to ADB. Aborting connection."; |
| 532 | return false; |
| 533 | } |
| 534 | } else { |
Alex Light | d925867 | 2018-02-12 14:47:16 -0800 | [diff] [blame] | 535 | if (VLOG_IS_ON(jdwp)) { |
| 536 | PLOG(ERROR) << "Can't connect to ADB control socket. Will retry."; |
| 537 | } |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 538 | |
| 539 | usleep(sleep_ms * 1000); |
| 540 | |
| 541 | sleep_ms += (sleep_ms >> 1); |
| 542 | if (sleep_ms > sleep_max_ms) { |
| 543 | sleep_ms = sleep_max_ms; |
| 544 | } |
| 545 | } |
| 546 | } |
| 547 | return false; |
| 548 | } |
| 549 | |
| 550 | void AdbConnectionState::RunPollLoop(art::Thread* self) { |
Alex Light | d6f9d85 | 2018-01-25 11:26:28 -0800 | [diff] [blame] | 551 | CHECK_NE(agent_name_, ""); |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 552 | CHECK_EQ(self->GetState(), art::kNative); |
Ziang Wan | 92db59b | 2019-07-22 21:19:24 +0000 | [diff] [blame^] | 553 | art::Locks::mutator_lock_->AssertNotHeld(self); |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 554 | self->SetState(art::kWaitingInMainDebuggerLoop); |
| 555 | // shutting_down_ set by StopDebuggerThreads |
| 556 | while (!shutting_down_) { |
| 557 | // First get the control_sock_ from adb if we don't have one. We only need to do this once. |
| 558 | if (control_sock_ == -1 && !SetupAdbConnection()) { |
| 559 | LOG(ERROR) << "Failed to setup adb connection."; |
| 560 | return; |
| 561 | } |
| 562 | while (!shutting_down_ && control_sock_ != -1) { |
Alex Light | 15b8113 | 2018-01-24 13:29:07 -0800 | [diff] [blame] | 563 | bool should_listen_on_connection = !agent_has_socket_ && !sent_agent_fds_; |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 564 | struct pollfd pollfds[4] = { |
| 565 | { sleep_event_fd_, POLLIN, 0 }, |
| 566 | // -1 as an fd causes it to be ignored by poll |
| 567 | { (agent_loaded_ ? local_agent_control_sock_ : -1), POLLIN, 0 }, |
| 568 | // Check for the control_sock_ actually going away. Only do this if we don't have an active |
| 569 | // connection. |
| 570 | { (adb_connection_socket_ == -1 ? control_sock_ : -1), POLLIN | POLLRDHUP, 0 }, |
| 571 | // if we have not loaded the agent either the adb_connection_socket_ is -1 meaning we don't |
| 572 | // have a real connection yet or the socket through adb needs to be listened to for incoming |
Alex Light | 15b8113 | 2018-01-24 13:29:07 -0800 | [diff] [blame] | 573 | // data that the agent or this plugin can handle. |
| 574 | { should_listen_on_connection ? adb_connection_socket_ : -1, POLLIN | POLLRDHUP, 0 } |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 575 | }; |
| 576 | int res = TEMP_FAILURE_RETRY(poll(pollfds, 4, -1)); |
| 577 | if (res < 0) { |
| 578 | PLOG(ERROR) << "Failed to poll!"; |
| 579 | return; |
| 580 | } |
| 581 | // We don't actually care about doing this we just use it to wake us up. |
| 582 | // const struct pollfd& sleep_event_poll = pollfds[0]; |
| 583 | const struct pollfd& agent_control_sock_poll = pollfds[1]; |
| 584 | const struct pollfd& control_sock_poll = pollfds[2]; |
| 585 | const struct pollfd& adb_socket_poll = pollfds[3]; |
| 586 | if (FlagsSet(agent_control_sock_poll.revents, POLLIN)) { |
| 587 | DCHECK(agent_loaded_); |
| 588 | char buf[257]; |
| 589 | res = TEMP_FAILURE_RETRY(recv(local_agent_control_sock_, buf, sizeof(buf) - 1, 0)); |
| 590 | if (res < 0) { |
| 591 | PLOG(ERROR) << "Failed to read message from agent control socket! Retrying"; |
| 592 | continue; |
| 593 | } else { |
| 594 | buf[res + 1] = '\0'; |
| 595 | VLOG(jdwp) << "Local agent control sock has data: " << static_cast<const char*>(buf); |
| 596 | } |
| 597 | if (memcmp(kListenStartMessage, buf, sizeof(kListenStartMessage)) == 0) { |
| 598 | agent_listening_ = true; |
| 599 | if (adb_connection_socket_ != -1) { |
Andreas Gampe | 9b031f7 | 2018-10-04 11:03:34 -0700 | [diff] [blame] | 600 | SendAgentFds(/*require_handshake=*/ !performed_handshake_); |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 601 | } |
| 602 | } else if (memcmp(kListenEndMessage, buf, sizeof(kListenEndMessage)) == 0) { |
| 603 | agent_listening_ = false; |
| 604 | } else if (memcmp(kCloseMessage, buf, sizeof(kCloseMessage)) == 0) { |
| 605 | CloseFds(); |
| 606 | agent_has_socket_ = false; |
| 607 | } else if (memcmp(kAcceptMessage, buf, sizeof(kAcceptMessage)) == 0) { |
| 608 | agent_has_socket_ = true; |
| 609 | sent_agent_fds_ = false; |
Alex Light | 15b8113 | 2018-01-24 13:29:07 -0800 | [diff] [blame] | 610 | // We will only ever do the handshake once so reset this. |
| 611 | performed_handshake_ = false; |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 612 | } else { |
| 613 | LOG(ERROR) << "Unknown message received from debugger! '" << std::string(buf) << "'"; |
| 614 | } |
| 615 | } else if (FlagsSet(control_sock_poll.revents, POLLIN)) { |
| 616 | bool maybe_send_fds = false; |
| 617 | { |
| 618 | // Hold onto this lock so that concurrent ddm publishes don't try to use an illegal fd. |
| 619 | ScopedEventFdLock sefdl(adb_write_event_fd_); |
| 620 | android::base::unique_fd new_fd(ReadFdFromAdb()); |
| 621 | if (new_fd == -1) { |
| 622 | // Something went wrong. We need to retry getting the control socket. |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 623 | control_sock_.reset(); |
| 624 | break; |
| 625 | } else if (adb_connection_socket_ != -1) { |
| 626 | // We already have a connection. |
| 627 | VLOG(jdwp) << "Ignoring second debugger. Accept then drop!"; |
| 628 | if (new_fd >= 0) { |
| 629 | new_fd.reset(); |
| 630 | } |
| 631 | } else { |
| 632 | VLOG(jdwp) << "Adb connection established with fd " << new_fd; |
| 633 | adb_connection_socket_ = std::move(new_fd); |
| 634 | maybe_send_fds = true; |
| 635 | } |
| 636 | } |
| 637 | if (maybe_send_fds && agent_loaded_ && agent_listening_) { |
| 638 | VLOG(jdwp) << "Sending fds as soon as we received them."; |
Alex Light | 15b8113 | 2018-01-24 13:29:07 -0800 | [diff] [blame] | 639 | // The agent was already loaded so this must be after a disconnection. Therefore have the |
| 640 | // transport perform the handshake. |
Andreas Gampe | 9b031f7 | 2018-10-04 11:03:34 -0700 | [diff] [blame] | 641 | SendAgentFds(/*require_handshake=*/ true); |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 642 | } |
| 643 | } else if (FlagsSet(control_sock_poll.revents, POLLRDHUP)) { |
| 644 | // The other end of the adb connection just dropped it. |
| 645 | // Reset the connection since we don't have an active socket through the adb server. |
| 646 | DCHECK(!agent_has_socket_) << "We shouldn't be doing anything if there is already a " |
| 647 | << "connection active"; |
| 648 | control_sock_.reset(); |
| 649 | break; |
| 650 | } else if (FlagsSet(adb_socket_poll.revents, POLLIN)) { |
| 651 | DCHECK(!agent_has_socket_); |
| 652 | if (!agent_loaded_) { |
Alex Light | 15b8113 | 2018-01-24 13:29:07 -0800 | [diff] [blame] | 653 | HandleDataWithoutAgent(self); |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 654 | } else if (agent_listening_ && !sent_agent_fds_) { |
| 655 | VLOG(jdwp) << "Sending agent fds again on data."; |
Alex Light | 15b8113 | 2018-01-24 13:29:07 -0800 | [diff] [blame] | 656 | // Agent was already loaded so it can deal with the handshake. |
Andreas Gampe | 9b031f7 | 2018-10-04 11:03:34 -0700 | [diff] [blame] | 657 | SendAgentFds(/*require_handshake=*/ true); |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 658 | } |
Alex Light | 15b8113 | 2018-01-24 13:29:07 -0800 | [diff] [blame] | 659 | } else if (FlagsSet(adb_socket_poll.revents, POLLRDHUP)) { |
| 660 | DCHECK(!agent_has_socket_); |
| 661 | CloseFds(); |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 662 | } else { |
| 663 | VLOG(jdwp) << "Woke up poll without anything to do!"; |
| 664 | } |
| 665 | } |
| 666 | } |
| 667 | } |
| 668 | |
Alex Light | 15b8113 | 2018-01-24 13:29:07 -0800 | [diff] [blame] | 669 | static uint32_t ReadUint32AndAdvance(/*in-out*/uint8_t** in) { |
| 670 | uint32_t res; |
| 671 | memcpy(&res, *in, sizeof(uint32_t)); |
| 672 | *in = (*in) + sizeof(uint32_t); |
| 673 | return ntohl(res); |
| 674 | } |
| 675 | |
| 676 | void AdbConnectionState::HandleDataWithoutAgent(art::Thread* self) { |
| 677 | DCHECK(!agent_loaded_); |
| 678 | DCHECK(!agent_listening_); |
| 679 | // TODO Should we check in some other way if we are userdebug/eng? |
| 680 | CHECK(art::Dbg::IsJdwpAllowed()); |
| 681 | // We try to avoid loading the agent which is expensive. First lets just perform the handshake. |
| 682 | if (!performed_handshake_) { |
| 683 | PerformHandshake(); |
| 684 | return; |
| 685 | } |
| 686 | // Read the packet header to figure out if it is one we can handle. We only 'peek' into the stream |
| 687 | // to see if it's one we can handle. This doesn't change the state of the socket. |
| 688 | alignas(sizeof(uint32_t)) uint8_t packet_header[kPacketHeaderLen]; |
| 689 | ssize_t res = TEMP_FAILURE_RETRY(recv(adb_connection_socket_.get(), |
| 690 | packet_header, |
| 691 | sizeof(packet_header), |
| 692 | MSG_PEEK)); |
| 693 | // We want to be very careful not to change the socket state until we know we succeeded. This will |
| 694 | // let us fall-back to just loading the agent and letting it deal with everything. |
| 695 | if (res <= 0) { |
| 696 | // Close the socket. We either hit EOF or an error. |
| 697 | if (res < 0) { |
| 698 | PLOG(ERROR) << "Unable to peek into adb socket due to error. Closing socket."; |
| 699 | } |
| 700 | CloseFds(); |
| 701 | return; |
| 702 | } else if (res < static_cast<int>(kPacketHeaderLen)) { |
| 703 | LOG(ERROR) << "Unable to peek into adb socket. Loading agent to handle this. Only read " << res; |
| 704 | AttachJdwpAgent(self); |
| 705 | return; |
| 706 | } |
| 707 | uint32_t full_len = ntohl(*reinterpret_cast<uint32_t*>(packet_header + kPacketSizeOff)); |
| 708 | uint32_t pkt_id = ntohl(*reinterpret_cast<uint32_t*>(packet_header + kPacketIdOff)); |
| 709 | uint8_t pkt_cmd_set = packet_header[kPacketCommandSetOff]; |
| 710 | uint8_t pkt_cmd = packet_header[kPacketCommandOff]; |
| 711 | if (pkt_cmd_set != kDdmCommandSet || |
| 712 | pkt_cmd != kDdmChunkCommand || |
| 713 | full_len < kPacketHeaderLen) { |
| 714 | VLOG(jdwp) << "Loading agent due to jdwp packet that cannot be handled by adbconnection."; |
| 715 | AttachJdwpAgent(self); |
| 716 | return; |
| 717 | } |
| 718 | uint32_t avail = -1; |
| 719 | res = TEMP_FAILURE_RETRY(ioctl(adb_connection_socket_.get(), FIONREAD, &avail)); |
| 720 | if (res < 0) { |
| 721 | PLOG(ERROR) << "Failed to determine amount of readable data in socket! Closing connection"; |
| 722 | CloseFds(); |
| 723 | return; |
| 724 | } else if (avail < full_len) { |
| 725 | LOG(WARNING) << "Unable to handle ddm command in adbconnection due to insufficent data. " |
| 726 | << "Expected " << full_len << " bytes but only " << avail << " are readable. " |
| 727 | << "Loading jdwp agent to deal with this."; |
| 728 | AttachJdwpAgent(self); |
| 729 | return; |
| 730 | } |
| 731 | // Actually read the data. |
| 732 | std::vector<uint8_t> full_pkt; |
| 733 | full_pkt.resize(full_len); |
| 734 | res = TEMP_FAILURE_RETRY(recv(adb_connection_socket_.get(), full_pkt.data(), full_len, 0)); |
| 735 | if (res < 0) { |
| 736 | PLOG(ERROR) << "Failed to recv data from adb connection. Closing connection"; |
| 737 | CloseFds(); |
| 738 | return; |
| 739 | } |
| 740 | DCHECK_EQ(memcmp(full_pkt.data(), packet_header, sizeof(packet_header)), 0); |
| 741 | size_t data_size = full_len - kPacketHeaderLen; |
| 742 | if (data_size < (sizeof(uint32_t) * 2)) { |
| 743 | // This is an error (the data isn't long enough) but to match historical behavior we need to |
| 744 | // ignore it. |
| 745 | return; |
| 746 | } |
| 747 | uint8_t* ddm_data = full_pkt.data() + kPacketHeaderLen; |
| 748 | uint32_t ddm_type = ReadUint32AndAdvance(&ddm_data); |
| 749 | uint32_t ddm_len = ReadUint32AndAdvance(&ddm_data); |
| 750 | if (ddm_len > data_size - (2 * sizeof(uint32_t))) { |
| 751 | // This is an error (the data isn't long enough) but to match historical behavior we need to |
| 752 | // ignore it. |
| 753 | return; |
| 754 | } |
| 755 | |
| 756 | if (!notified_ddm_active_) { |
Andreas Gampe | 9b031f7 | 2018-10-04 11:03:34 -0700 | [diff] [blame] | 757 | NotifyDdms(/*active=*/ true); |
Alex Light | 15b8113 | 2018-01-24 13:29:07 -0800 | [diff] [blame] | 758 | } |
| 759 | uint32_t reply_type; |
| 760 | std::vector<uint8_t> reply; |
| 761 | if (!art::Dbg::DdmHandleChunk(self->GetJniEnv(), |
| 762 | ddm_type, |
| 763 | art::ArrayRef<const jbyte>(reinterpret_cast<const jbyte*>(ddm_data), |
| 764 | ddm_len), |
| 765 | /*out*/&reply_type, |
| 766 | /*out*/&reply)) { |
| 767 | // To match historical behavior we don't send any response when there is no data to reply with. |
| 768 | return; |
| 769 | } |
| 770 | SendDdmPacket(pkt_id, |
| 771 | DdmPacketType::kReply, |
| 772 | reply_type, |
| 773 | art::ArrayRef<const uint8_t>(reply)); |
| 774 | } |
| 775 | |
| 776 | void AdbConnectionState::PerformHandshake() { |
| 777 | CHECK(!performed_handshake_); |
| 778 | // Check to make sure we are able to read the whole handshake. |
| 779 | uint32_t avail = -1; |
| 780 | int res = TEMP_FAILURE_RETRY(ioctl(adb_connection_socket_.get(), FIONREAD, &avail)); |
| 781 | if (res < 0 || avail < sizeof(kJdwpHandshake)) { |
| 782 | if (res < 0) { |
| 783 | PLOG(ERROR) << "Failed to determine amount of readable data for handshake!"; |
| 784 | } |
| 785 | LOG(WARNING) << "Closing connection to broken client."; |
| 786 | CloseFds(); |
| 787 | return; |
| 788 | } |
| 789 | // Perform the handshake. |
| 790 | char handshake_msg[sizeof(kJdwpHandshake)]; |
| 791 | res = TEMP_FAILURE_RETRY(recv(adb_connection_socket_.get(), |
| 792 | handshake_msg, |
| 793 | sizeof(handshake_msg), |
| 794 | MSG_DONTWAIT)); |
| 795 | if (res < static_cast<int>(sizeof(kJdwpHandshake)) || |
| 796 | strncmp(handshake_msg, kJdwpHandshake, sizeof(kJdwpHandshake)) != 0) { |
| 797 | if (res < 0) { |
| 798 | PLOG(ERROR) << "Failed to read handshake!"; |
| 799 | } |
| 800 | LOG(WARNING) << "Handshake failed!"; |
| 801 | CloseFds(); |
| 802 | return; |
| 803 | } |
| 804 | // Send the handshake back. |
| 805 | res = TEMP_FAILURE_RETRY(send(adb_connection_socket_.get(), |
| 806 | kJdwpHandshake, |
| 807 | sizeof(kJdwpHandshake), |
| 808 | 0)); |
| 809 | if (res < static_cast<int>(sizeof(kJdwpHandshake))) { |
| 810 | PLOG(ERROR) << "Failed to send jdwp-handshake response."; |
| 811 | CloseFds(); |
| 812 | return; |
| 813 | } |
| 814 | performed_handshake_ = true; |
| 815 | } |
| 816 | |
| 817 | void AdbConnectionState::AttachJdwpAgent(art::Thread* self) { |
Alex Light | bd2a4e2 | 2018-04-17 09:07:37 -0700 | [diff] [blame] | 818 | art::Runtime* runtime = art::Runtime::Current(); |
Alex Light | 15b8113 | 2018-01-24 13:29:07 -0800 | [diff] [blame] | 819 | self->AssertNoPendingException(); |
Andreas Gampe | 9b031f7 | 2018-10-04 11:03:34 -0700 | [diff] [blame] | 820 | runtime->AttachAgent(/* env= */ nullptr, |
Alex Light | bd2a4e2 | 2018-04-17 09:07:37 -0700 | [diff] [blame] | 821 | MakeAgentArg(), |
Andreas Gampe | 9b031f7 | 2018-10-04 11:03:34 -0700 | [diff] [blame] | 822 | /* class_loader= */ nullptr); |
Alex Light | 15b8113 | 2018-01-24 13:29:07 -0800 | [diff] [blame] | 823 | if (self->IsExceptionPending()) { |
| 824 | LOG(ERROR) << "Failed to load agent " << agent_name_; |
| 825 | art::ScopedObjectAccess soa(self); |
| 826 | self->GetException()->Dump(); |
| 827 | self->ClearException(); |
| 828 | return; |
| 829 | } |
| 830 | agent_loaded_ = true; |
| 831 | } |
| 832 | |
Alex Light | 81f75c3 | 2018-01-26 09:46:32 -0800 | [diff] [blame] | 833 | bool ContainsArgument(const std::string& opts, const char* arg) { |
| 834 | return opts.find(arg) != std::string::npos; |
| 835 | } |
| 836 | |
| 837 | bool ValidateJdwpOptions(const std::string& opts) { |
| 838 | bool res = true; |
| 839 | // The adbconnection plugin requires that the jdwp agent be configured as a 'server' because that |
| 840 | // is what adb expects and otherwise we will hit a deadlock as the poll loop thread stops waiting |
| 841 | // for the fd's to be passed down. |
| 842 | if (ContainsArgument(opts, "server=n")) { |
| 843 | res = false; |
| 844 | LOG(ERROR) << "Cannot start jdwp debugging with server=n from adbconnection."; |
| 845 | } |
| 846 | // We don't start the jdwp agent until threads are already running. It is far too late to suspend |
| 847 | // everything. |
| 848 | if (ContainsArgument(opts, "suspend=y")) { |
| 849 | res = false; |
| 850 | LOG(ERROR) << "Cannot use suspend=y with late-init jdwp."; |
| 851 | } |
| 852 | return res; |
| 853 | } |
| 854 | |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 855 | std::string AdbConnectionState::MakeAgentArg() { |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 856 | const std::string& opts = art::Runtime::Current()->GetJdwpOptions(); |
Alex Light | 81f75c3 | 2018-01-26 09:46:32 -0800 | [diff] [blame] | 857 | DCHECK(ValidateJdwpOptions(opts)); |
| 858 | // TODO Get agent_name_ from something user settable? |
| 859 | return agent_name_ + "=" + opts + (opts.empty() ? "" : ",") + |
| 860 | "ddm_already_active=" + (notified_ddm_active_ ? "y" : "n") + "," + |
| 861 | // See the comment above for why we need to be server=y. Since the agent defaults to server=n |
| 862 | // we will add it if it wasn't already present for the convenience of the user. |
| 863 | (ContainsArgument(opts, "server=y") ? "" : "server=y,") + |
| 864 | // See the comment above for why we need to be suspend=n. Since the agent defaults to |
| 865 | // suspend=y we will add it if it wasn't already present. |
Alex Light | 5ebdc88 | 2018-06-04 16:42:30 -0700 | [diff] [blame] | 866 | (ContainsArgument(opts, "suspend=n") ? "" : "suspend=n,") + |
Alex Light | 81f75c3 | 2018-01-26 09:46:32 -0800 | [diff] [blame] | 867 | "transport=dt_fd_forward,address=" + std::to_string(remote_agent_control_sock_); |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 868 | } |
| 869 | |
| 870 | void AdbConnectionState::StopDebuggerThreads() { |
| 871 | // The regular agent system will take care of unloading the agent (if needed). |
| 872 | shutting_down_ = true; |
| 873 | // Wakeup the poll loop. |
| 874 | uint64_t data = 1; |
Alex Light | d6f9d85 | 2018-01-25 11:26:28 -0800 | [diff] [blame] | 875 | if (sleep_event_fd_ != -1) { |
| 876 | TEMP_FAILURE_RETRY(write(sleep_event_fd_, &data, sizeof(data))); |
| 877 | } |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 878 | } |
| 879 | |
| 880 | // The plugin initialization function. |
| 881 | extern "C" bool ArtPlugin_Initialize() REQUIRES_SHARED(art::Locks::mutator_lock_) { |
| 882 | DCHECK(art::Runtime::Current()->GetJdwpProvider() == art::JdwpProvider::kAdbConnection); |
| 883 | // TODO Provide some way for apps to set this maybe? |
Alex Light | d6f9d85 | 2018-01-25 11:26:28 -0800 | [diff] [blame] | 884 | DCHECK(gState == nullptr); |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 885 | gState = new AdbConnectionState(kDefaultJdwpAgentName); |
Alex Light | 81f75c3 | 2018-01-26 09:46:32 -0800 | [diff] [blame] | 886 | return ValidateJdwpOptions(art::Runtime::Current()->GetJdwpOptions()); |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 887 | } |
| 888 | |
| 889 | extern "C" bool ArtPlugin_Deinitialize() { |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 890 | gState->StopDebuggerThreads(); |
Alex Light | d6f9d85 | 2018-01-25 11:26:28 -0800 | [diff] [blame] | 891 | if (!gState->DebuggerThreadsStarted()) { |
| 892 | // If debugger threads were started then those threads will delete the state once they are done. |
| 893 | delete gState; |
| 894 | } |
Alex Light | fbf9670 | 2017-12-14 13:27:13 -0800 | [diff] [blame] | 895 | return true; |
| 896 | } |
| 897 | |
| 898 | } // namespace adbconnection |