| /* |
| * Copyright (C) 2017 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include <array> |
| |
| #include "adbconnection.h" |
| |
| #include "android-base/endian.h" |
| #include "android-base/stringprintf.h" |
| #include "base/logging.h" |
| #include "base/macros.h" |
| #include "base/mutex.h" |
| #include "java_vm_ext.h" |
| #include "jni_env_ext.h" |
| #include "mirror/throwable.h" |
| #include "nativehelper/ScopedLocalRef.h" |
| #include "runtime-inl.h" |
| #include "runtime_callbacks.h" |
| #include "scoped_thread_state_change-inl.h" |
| #include "well_known_classes.h" |
| |
| #include "jdwp/jdwp_priv.h" |
| |
| #include "fd_transport.h" |
| |
| #include "poll.h" |
| |
| #ifdef ART_TARGET_ANDROID |
| #include "cutils/sockets.h" |
| #endif |
| |
| #include <sys/socket.h> |
| #include <sys/un.h> |
| #include <sys/eventfd.h> |
| #include <jni.h> |
| |
| namespace adbconnection { |
| |
| using dt_fd_forward::kListenStartMessage; |
| using dt_fd_forward::kListenEndMessage; |
| using dt_fd_forward::kAcceptMessage; |
| using dt_fd_forward::kCloseMessage; |
| |
| using android::base::StringPrintf; |
| |
| static constexpr int kEventfdLocked = 0; |
| static constexpr int kEventfdUnlocked = 1; |
| static constexpr int kControlSockSendTimeout = 10; |
| |
| static AdbConnectionState* gState; |
| |
| static bool IsDebuggingPossible() { |
| // TODO We need to do this on IsJdwpAllowed not IsDebuggable in order to support userdebug |
| // workloads. For now we will only allow it when we are debuggable so that testing is easier. |
| return art::Runtime::Current()->IsJavaDebuggable() && art::Dbg::IsJdwpAllowed(); |
| } |
| |
| // Begin running the debugger. |
| void AdbConnectionDebuggerController::StartDebugger() { |
| if (IsDebuggingPossible()) { |
| connection_->StartDebuggerThreads(); |
| } else { |
| LOG(ERROR) << "Not starting debugger since process cannot load the jdwp agent."; |
| } |
| } |
| |
| // The debugger should begin shutting down since the runtime is ending. We don't actually do |
| // anything here. The real shutdown has already happened as far as the agent is concerned. |
| void AdbConnectionDebuggerController::StopDebugger() { } |
| |
| bool AdbConnectionDebuggerController::IsDebuggerConfigured() { |
| return IsDebuggingPossible() && !art::Runtime::Current()->GetJdwpOptions().empty(); |
| } |
| |
| void AdbConnectionDdmCallback::DdmPublishChunk(uint32_t type, |
| const art::ArrayRef<const uint8_t>& data) { |
| connection_->PublishDdmData(type, data); |
| } |
| |
| class ScopedEventFdLock { |
| public: |
| explicit ScopedEventFdLock(int fd) : fd_(fd), data_(0) { |
| TEMP_FAILURE_RETRY(read(fd_, &data_, sizeof(data_))); |
| } |
| |
| ~ScopedEventFdLock() { |
| TEMP_FAILURE_RETRY(write(fd_, &data_, sizeof(data_))); |
| } |
| |
| private: |
| int fd_; |
| uint64_t data_; |
| }; |
| |
| AdbConnectionState::AdbConnectionState(const std::string& agent_name) |
| : agent_name_(agent_name), |
| controller_(this), |
| ddm_callback_(this), |
| sleep_event_fd_(-1), |
| control_sock_(-1), |
| local_agent_control_sock_(-1), |
| remote_agent_control_sock_(-1), |
| adb_connection_socket_(-1), |
| adb_write_event_fd_(-1), |
| shutting_down_(false), |
| agent_loaded_(false), |
| agent_listening_(false), |
| next_ddm_id_(1) { |
| // Setup the addr. |
| control_addr_.controlAddrUn.sun_family = AF_UNIX; |
| control_addr_len_ = sizeof(control_addr_.controlAddrUn.sun_family) + sizeof(kJdwpControlName) - 1; |
| memcpy(control_addr_.controlAddrUn.sun_path, kJdwpControlName, sizeof(kJdwpControlName) - 1); |
| |
| // Add the startup callback. |
| art::ScopedObjectAccess soa(art::Thread::Current()); |
| art::Runtime::Current()->GetRuntimeCallbacks()->AddDebuggerControlCallback(&controller_); |
| } |
| |
| static jobject CreateAdbConnectionThread(art::Thread* thr) { |
| JNIEnv* env = thr->GetJniEnv(); |
| // Move to native state to talk with the jnienv api. |
| art::ScopedThreadStateChange stsc(thr, art::kNative); |
| ScopedLocalRef<jstring> thr_name(env, env->NewStringUTF(kAdbConnectionThreadName)); |
| ScopedLocalRef<jobject> thr_group( |
| env, |
| env->GetStaticObjectField(art::WellKnownClasses::java_lang_ThreadGroup, |
| art::WellKnownClasses::java_lang_ThreadGroup_systemThreadGroup)); |
| return env->NewObject(art::WellKnownClasses::java_lang_Thread, |
| art::WellKnownClasses::java_lang_Thread_init, |
| thr_group.get(), |
| thr_name.get(), |
| /*Priority*/ 0, |
| /*Daemon*/ true); |
| } |
| |
| struct CallbackData { |
| AdbConnectionState* this_; |
| jobject thr_; |
| }; |
| |
| static void* CallbackFunction(void* vdata) { |
| std::unique_ptr<CallbackData> data(reinterpret_cast<CallbackData*>(vdata)); |
| art::Thread* self = art::Thread::Attach(kAdbConnectionThreadName, |
| true, |
| data->thr_); |
| CHECK(self != nullptr) << "threads_being_born_ should have ensured thread could be attached."; |
| // The name in Attach() is only for logging. Set the thread name. This is important so |
| // that the thread is no longer seen as starting up. |
| { |
| art::ScopedObjectAccess soa(self); |
| self->SetThreadName(kAdbConnectionThreadName); |
| } |
| |
| // Release the peer. |
| JNIEnv* env = self->GetJniEnv(); |
| env->DeleteGlobalRef(data->thr_); |
| data->thr_ = nullptr; |
| { |
| // The StartThreadBirth was called in the parent thread. We let the runtime know we are up |
| // before going into the provided code. |
| art::MutexLock mu(self, *art::Locks::runtime_shutdown_lock_); |
| art::Runtime::Current()->EndThreadBirth(); |
| } |
| data->this_->RunPollLoop(self); |
| int detach_result = art::Runtime::Current()->GetJavaVM()->DetachCurrentThread(); |
| CHECK_EQ(detach_result, 0); |
| |
| return nullptr; |
| } |
| |
| void AdbConnectionState::StartDebuggerThreads() { |
| // First do all the final setup we need. |
| CHECK_EQ(adb_write_event_fd_.get(), -1); |
| CHECK_EQ(sleep_event_fd_.get(), -1); |
| CHECK_EQ(local_agent_control_sock_.get(), -1); |
| CHECK_EQ(remote_agent_control_sock_.get(), -1); |
| |
| sleep_event_fd_.reset(eventfd(kEventfdLocked, EFD_CLOEXEC)); |
| CHECK_NE(sleep_event_fd_.get(), -1) << "Unable to create wakeup eventfd."; |
| adb_write_event_fd_.reset(eventfd(kEventfdUnlocked, EFD_CLOEXEC)); |
| CHECK_NE(adb_write_event_fd_.get(), -1) << "Unable to create write-lock eventfd."; |
| |
| { |
| art::ScopedObjectAccess soa(art::Thread::Current()); |
| art::Runtime::Current()->GetRuntimeCallbacks()->AddDdmCallback(&ddm_callback_); |
| } |
| // Setup the socketpair we use to talk to the agent. |
| bool has_sockets; |
| do { |
| has_sockets = android::base::Socketpair(AF_UNIX, |
| SOCK_SEQPACKET | SOCK_CLOEXEC, |
| 0, |
| &local_agent_control_sock_, |
| &remote_agent_control_sock_); |
| } while (!has_sockets && errno == EINTR); |
| if (!has_sockets) { |
| PLOG(FATAL) << "Unable to create socketpair for agent control!"; |
| } |
| |
| // Next start the threads. |
| art::Thread* self = art::Thread::Current(); |
| art::ScopedObjectAccess soa(self); |
| { |
| art::Runtime* runtime = art::Runtime::Current(); |
| art::MutexLock mu(self, *art::Locks::runtime_shutdown_lock_); |
| if (runtime->IsShuttingDownLocked()) { |
| // The runtime is shutting down so we cannot create new threads. This shouldn't really happen. |
| LOG(ERROR) << "The runtime is shutting down when we are trying to start up the debugger!"; |
| return; |
| } |
| runtime->StartThreadBirth(); |
| } |
| ScopedLocalRef<jobject> thr(soa.Env(), CreateAdbConnectionThread(soa.Self())); |
| pthread_t pthread; |
| std::unique_ptr<CallbackData> data(new CallbackData { this, soa.Env()->NewGlobalRef(thr.get()) }); |
| int pthread_create_result = pthread_create(&pthread, |
| nullptr, |
| &CallbackFunction, |
| data.get()); |
| if (pthread_create_result != 0) { |
| // If the create succeeded the other thread will call EndThreadBirth. |
| art::Runtime* runtime = art::Runtime::Current(); |
| soa.Env()->DeleteGlobalRef(data->thr_); |
| LOG(ERROR) << "Failed to create thread for adb-jdwp connection manager!"; |
| art::MutexLock mu(art::Thread::Current(), *art::Locks::runtime_shutdown_lock_); |
| runtime->EndThreadBirth(); |
| return; |
| } |
| data.release(); |
| } |
| |
| static bool FlagsSet(int16_t data, int16_t flags) { |
| return (data & flags) == flags; |
| } |
| |
| void AdbConnectionState::CloseFds() { |
| // Lock the write_event_fd so that concurrent PublishDdms will see that the connection is closed. |
| ScopedEventFdLock lk(adb_write_event_fd_); |
| // shutdown(adb_connection_socket_, SHUT_RDWR); |
| adb_connection_socket_.reset(); |
| } |
| |
| uint32_t AdbConnectionState::NextDdmId() { |
| // Just have a normal counter but always set the sign bit. |
| return (next_ddm_id_++) | 0x80000000; |
| } |
| |
| void AdbConnectionState::PublishDdmData(uint32_t type, const art::ArrayRef<const uint8_t>& data) { |
| // Get the write_event early to fail fast. |
| ScopedEventFdLock lk(adb_write_event_fd_); |
| if (adb_connection_socket_ == -1) { |
| LOG(WARNING) << "Not sending ddms data of type " |
| << StringPrintf("%c%c%c%c", |
| static_cast<char>(type >> 24), |
| static_cast<char>(type >> 16), |
| static_cast<char>(type >> 8), |
| static_cast<char>(type)) << " due to no connection!"; |
| // Adb is not connected. |
| return; |
| } |
| |
| // the adb_write_event_fd_ will ensure that the adb_connection_socket_ will not go away until |
| // after we have sent our data. |
| static constexpr uint32_t kDdmPacketHeaderSize = |
| kJDWPHeaderLen // jdwp command packet size |
| + sizeof(uint32_t) // Type |
| + sizeof(uint32_t); // length |
| std::array<uint8_t, kDdmPacketHeaderSize> pkt; |
| uint8_t* pkt_data = pkt.data(); |
| |
| // Write the length first. |
| *reinterpret_cast<uint32_t*>(pkt_data) = htonl(kDdmPacketHeaderSize + data.size()); |
| pkt_data += sizeof(uint32_t); |
| |
| // Write the id next; |
| *reinterpret_cast<uint32_t*>(pkt_data) = htonl(NextDdmId()); |
| pkt_data += sizeof(uint32_t); |
| |
| // next the flags. (0 for cmd packet because DDMS). |
| *(pkt_data++) = 0; |
| // Now the cmd-set |
| *(pkt_data++) = kJDWPDdmCmdSet; |
| // Now the command |
| *(pkt_data++) = kJDWPDdmCmd; |
| |
| // now the type. |
| *reinterpret_cast<uint32_t*>(pkt_data) = htonl(type); |
| pkt_data += sizeof(uint32_t); |
| |
| // Now the data.size() |
| *reinterpret_cast<uint32_t*>(pkt_data) = htonl(data.size()); |
| pkt_data += sizeof(uint32_t); |
| |
| static uint32_t constexpr kIovSize = 2; |
| struct iovec iovs[kIovSize] = { |
| { pkt.data(), pkt.size() }, |
| { const_cast<uint8_t*>(data.data()), data.size() }, |
| }; |
| // now pkt_header has the header. |
| // use writev to send the actual data. |
| ssize_t res = TEMP_FAILURE_RETRY(writev(adb_connection_socket_, iovs, kIovSize)); |
| if (static_cast<size_t>(res) != (kDdmPacketHeaderSize + data.size())) { |
| PLOG(ERROR) << StringPrintf("Failed to send DDMS packet %c%c%c%c to debugger (%zd of %zu)", |
| static_cast<char>(type >> 24), |
| static_cast<char>(type >> 16), |
| static_cast<char>(type >> 8), |
| static_cast<char>(type), |
| res, data.size() + kDdmPacketHeaderSize); |
| } else { |
| VLOG(jdwp) << StringPrintf("sent DDMS packet %c%c%c%c to debugger %zu", |
| static_cast<char>(type >> 24), |
| static_cast<char>(type >> 16), |
| static_cast<char>(type >> 8), |
| static_cast<char>(type), |
| data.size() + kDdmPacketHeaderSize); |
| } |
| } |
| |
| void AdbConnectionState::SendAgentFds() { |
| // TODO |
| DCHECK(!sent_agent_fds_); |
| char dummy = '!'; |
| union { |
| cmsghdr cm; |
| char buffer[CMSG_SPACE(dt_fd_forward::FdSet::kDataLength)]; |
| } cm_un; |
| iovec iov; |
| iov.iov_base = &dummy; |
| iov.iov_len = 1; |
| |
| msghdr msg; |
| msg.msg_name = nullptr; |
| msg.msg_namelen = 0; |
| msg.msg_iov = &iov; |
| msg.msg_iovlen = 1; |
| msg.msg_flags = 0; |
| msg.msg_control = cm_un.buffer; |
| msg.msg_controllen = sizeof(cm_un.buffer); |
| |
| cmsghdr* cmsg = CMSG_FIRSTHDR(&msg); |
| cmsg->cmsg_len = CMSG_LEN(dt_fd_forward::FdSet::kDataLength); |
| cmsg->cmsg_level = SOL_SOCKET; |
| cmsg->cmsg_type = SCM_RIGHTS; |
| |
| // Duplicate the fds before sending them. |
| android::base::unique_fd read_fd(dup(adb_connection_socket_)); |
| CHECK_NE(read_fd.get(), -1) << "Failed to dup read_fd_: " << strerror(errno); |
| android::base::unique_fd write_fd(dup(adb_connection_socket_)); |
| CHECK_NE(write_fd.get(), -1) << "Failed to dup write_fd: " << strerror(errno); |
| android::base::unique_fd write_lock_fd(dup(adb_write_event_fd_)); |
| CHECK_NE(write_lock_fd.get(), -1) << "Failed to dup write_lock_fd: " << strerror(errno); |
| |
| dt_fd_forward::FdSet { |
| read_fd.get(), write_fd.get(), write_lock_fd.get() |
| }.WriteData(CMSG_DATA(cmsg)); |
| |
| int res = TEMP_FAILURE_RETRY(sendmsg(local_agent_control_sock_, &msg, MSG_EOR)); |
| if (res < 0) { |
| PLOG(ERROR) << "Failed to send agent adb connection fds."; |
| } else { |
| sent_agent_fds_ = true; |
| VLOG(jdwp) << "Fds have been sent to jdwp agent!"; |
| } |
| } |
| |
| android::base::unique_fd AdbConnectionState::ReadFdFromAdb() { |
| // We don't actually care about the data that is sent. We do need to receive something though. |
| char dummy = '!'; |
| union { |
| cmsghdr cm; |
| char buffer[CMSG_SPACE(sizeof(int))]; |
| } cm_un; |
| |
| iovec iov; |
| iov.iov_base = &dummy; |
| iov.iov_len = 1; |
| |
| msghdr msg; |
| msg.msg_name = nullptr; |
| msg.msg_namelen = 0; |
| msg.msg_iov = &iov; |
| msg.msg_iovlen = 1; |
| msg.msg_flags = 0; |
| msg.msg_control = cm_un.buffer; |
| msg.msg_controllen = sizeof(cm_un.buffer); |
| |
| cmsghdr* cmsg = CMSG_FIRSTHDR(&msg); |
| cmsg->cmsg_len = msg.msg_controllen; |
| cmsg->cmsg_level = SOL_SOCKET; |
| cmsg->cmsg_type = SCM_RIGHTS; |
| (reinterpret_cast<int*>(CMSG_DATA(cmsg)))[0] = -1; |
| |
| int rc = TEMP_FAILURE_RETRY(recvmsg(control_sock_, &msg, 0)); |
| |
| if (rc <= 0) { |
| PLOG(WARNING) << "Receiving file descriptor from ADB failed (socket " << control_sock_ << ")"; |
| return android::base::unique_fd(-1); |
| } else { |
| VLOG(jdwp) << "Fds have been received from ADB!"; |
| } |
| |
| return android::base::unique_fd((reinterpret_cast<int*>(CMSG_DATA(cmsg)))[0]); |
| } |
| |
| bool AdbConnectionState::SetupAdbConnection() { |
| int sleep_ms = 500; |
| const int sleep_max_ms = 2*1000; |
| char buff[sizeof(pid_t) + 1]; |
| |
| android::base::unique_fd sock(socket(AF_UNIX, SOCK_SEQPACKET, 0)); |
| if (sock < 0) { |
| PLOG(ERROR) << "Could not create ADB control socket"; |
| return false; |
| } |
| struct timeval timeout; |
| timeout.tv_sec = kControlSockSendTimeout; |
| timeout.tv_usec = 0; |
| setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, &timeout, sizeof(timeout)); |
| snprintf(buff, sizeof(buff), "%04x", getpid()); |
| buff[sizeof(pid_t)] = 0; |
| |
| while (!shutting_down_) { |
| // If adbd isn't running, because USB debugging was disabled or |
| // perhaps the system is restarting it for "adb root", the |
| // connect() will fail. We loop here forever waiting for it |
| // to come back. |
| // |
| // Waking up and polling every couple of seconds is generally a |
| // bad thing to do, but we only do this if the application is |
| // debuggable *and* adbd isn't running. Still, for the sake |
| // of battery life, we should consider timing out and giving |
| // up after a few minutes in case somebody ships an app with |
| // the debuggable flag set. |
| int ret = connect(sock, &control_addr_.controlAddrPlain, control_addr_len_); |
| if (ret == 0) { |
| bool trusted = sock >= 0; |
| #ifdef ART_TARGET_ANDROID |
| // Needed for socket_peer_is_trusted. |
| trusted = trusted && socket_peer_is_trusted(sock); |
| #endif |
| if (!trusted) { |
| LOG(ERROR) << "adb socket is not trusted. Aborting connection."; |
| if (sock >= 0 && shutdown(sock, SHUT_RDWR)) { |
| PLOG(ERROR) << "trouble shutting down socket"; |
| } |
| return false; |
| } |
| /* now try to send our pid to the ADB daemon */ |
| ret = TEMP_FAILURE_RETRY(send(sock, buff, sizeof(pid_t), 0)); |
| if (ret == sizeof(pid_t)) { |
| LOG(INFO) << "PID " << getpid() << " send to adb"; |
| control_sock_ = std::move(sock); |
| return true; |
| } else { |
| PLOG(ERROR) << "Weird, can't send JDWP process pid to ADB. Aborting connection."; |
| return false; |
| } |
| } else { |
| PLOG(ERROR) << "Can't connect to ADB control socket. Will retry."; |
| |
| usleep(sleep_ms * 1000); |
| |
| sleep_ms += (sleep_ms >> 1); |
| if (sleep_ms > sleep_max_ms) { |
| sleep_ms = sleep_max_ms; |
| } |
| } |
| } |
| return false; |
| } |
| |
| void AdbConnectionState::RunPollLoop(art::Thread* self) { |
| CHECK_EQ(self->GetState(), art::kNative); |
| // TODO: Clang prebuilt for r316199 produces bogus thread safety analysis warning for holding both |
| // exclusive and shared lock in the same scope. Remove the assertion as a temporary workaround. |
| // http://b/71769596 |
| // art::Locks::mutator_lock_->AssertNotHeld(self); |
| self->SetState(art::kWaitingInMainDebuggerLoop); |
| // shutting_down_ set by StopDebuggerThreads |
| while (!shutting_down_) { |
| // First get the control_sock_ from adb if we don't have one. We only need to do this once. |
| if (control_sock_ == -1 && !SetupAdbConnection()) { |
| LOG(ERROR) << "Failed to setup adb connection."; |
| return; |
| } |
| while (!shutting_down_ && control_sock_ != -1) { |
| struct pollfd pollfds[4] = { |
| { sleep_event_fd_, POLLIN, 0 }, |
| // -1 as an fd causes it to be ignored by poll |
| { (agent_loaded_ ? local_agent_control_sock_ : -1), POLLIN, 0 }, |
| // Check for the control_sock_ actually going away. Only do this if we don't have an active |
| // connection. |
| { (adb_connection_socket_ == -1 ? control_sock_ : -1), POLLIN | POLLRDHUP, 0 }, |
| // if we have not loaded the agent either the adb_connection_socket_ is -1 meaning we don't |
| // have a real connection yet or the socket through adb needs to be listened to for incoming |
| // data that the agent can handle. |
| { ((!agent_has_socket_ && !sent_agent_fds_) ? adb_connection_socket_ : -1), POLLIN, 0 } |
| }; |
| int res = TEMP_FAILURE_RETRY(poll(pollfds, 4, -1)); |
| if (res < 0) { |
| PLOG(ERROR) << "Failed to poll!"; |
| return; |
| } |
| // We don't actually care about doing this we just use it to wake us up. |
| // const struct pollfd& sleep_event_poll = pollfds[0]; |
| const struct pollfd& agent_control_sock_poll = pollfds[1]; |
| const struct pollfd& control_sock_poll = pollfds[2]; |
| const struct pollfd& adb_socket_poll = pollfds[3]; |
| if (FlagsSet(agent_control_sock_poll.revents, POLLIN)) { |
| DCHECK(agent_loaded_); |
| char buf[257]; |
| res = TEMP_FAILURE_RETRY(recv(local_agent_control_sock_, buf, sizeof(buf) - 1, 0)); |
| if (res < 0) { |
| PLOG(ERROR) << "Failed to read message from agent control socket! Retrying"; |
| continue; |
| } else { |
| buf[res + 1] = '\0'; |
| VLOG(jdwp) << "Local agent control sock has data: " << static_cast<const char*>(buf); |
| } |
| if (memcmp(kListenStartMessage, buf, sizeof(kListenStartMessage)) == 0) { |
| agent_listening_ = true; |
| if (adb_connection_socket_ != -1) { |
| SendAgentFds(); |
| } |
| } else if (memcmp(kListenEndMessage, buf, sizeof(kListenEndMessage)) == 0) { |
| agent_listening_ = false; |
| } else if (memcmp(kCloseMessage, buf, sizeof(kCloseMessage)) == 0) { |
| CloseFds(); |
| agent_has_socket_ = false; |
| } else if (memcmp(kAcceptMessage, buf, sizeof(kAcceptMessage)) == 0) { |
| agent_has_socket_ = true; |
| sent_agent_fds_ = false; |
| } else { |
| LOG(ERROR) << "Unknown message received from debugger! '" << std::string(buf) << "'"; |
| } |
| } else if (FlagsSet(control_sock_poll.revents, POLLIN)) { |
| bool maybe_send_fds = false; |
| { |
| // Hold onto this lock so that concurrent ddm publishes don't try to use an illegal fd. |
| ScopedEventFdLock sefdl(adb_write_event_fd_); |
| android::base::unique_fd new_fd(ReadFdFromAdb()); |
| if (new_fd == -1) { |
| // Something went wrong. We need to retry getting the control socket. |
| PLOG(ERROR) << "Something went wrong getting fds from adb. Retry!"; |
| control_sock_.reset(); |
| break; |
| } else if (adb_connection_socket_ != -1) { |
| // We already have a connection. |
| VLOG(jdwp) << "Ignoring second debugger. Accept then drop!"; |
| if (new_fd >= 0) { |
| new_fd.reset(); |
| } |
| } else { |
| VLOG(jdwp) << "Adb connection established with fd " << new_fd; |
| adb_connection_socket_ = std::move(new_fd); |
| maybe_send_fds = true; |
| } |
| } |
| if (maybe_send_fds && agent_loaded_ && agent_listening_) { |
| VLOG(jdwp) << "Sending fds as soon as we received them."; |
| SendAgentFds(); |
| } |
| } else if (FlagsSet(control_sock_poll.revents, POLLRDHUP)) { |
| // The other end of the adb connection just dropped it. |
| // Reset the connection since we don't have an active socket through the adb server. |
| DCHECK(!agent_has_socket_) << "We shouldn't be doing anything if there is already a " |
| << "connection active"; |
| control_sock_.reset(); |
| break; |
| } else if (FlagsSet(adb_socket_poll.revents, POLLIN)) { |
| DCHECK(!agent_has_socket_); |
| if (!agent_loaded_) { |
| DCHECK(!agent_listening_); |
| // Load the agent now! |
| self->AssertNoPendingException(); |
| art::Runtime::Current()->AttachAgent(/* JNIEnv* */ nullptr, |
| MakeAgentArg(), |
| /* classloader */ nullptr); |
| if (self->IsExceptionPending()) { |
| LOG(ERROR) << "Failed to load agent " << agent_name_; |
| art::ScopedObjectAccess soa(self); |
| self->GetException()->Dump(); |
| self->ClearException(); |
| return; |
| } |
| agent_loaded_ = true; |
| } else if (agent_listening_ && !sent_agent_fds_) { |
| VLOG(jdwp) << "Sending agent fds again on data."; |
| SendAgentFds(); |
| } |
| } else { |
| VLOG(jdwp) << "Woke up poll without anything to do!"; |
| } |
| } |
| } |
| } |
| |
| std::string AdbConnectionState::MakeAgentArg() { |
| // TODO Get this from something user settable? |
| const std::string& opts = art::Runtime::Current()->GetJdwpOptions(); |
| return agent_name_ + "=" + opts + (opts.empty() ? "" : ",") |
| + "transport=dt_fd_forward,address=" + std::to_string(remote_agent_control_sock_); |
| } |
| |
| void AdbConnectionState::StopDebuggerThreads() { |
| // The regular agent system will take care of unloading the agent (if needed). |
| shutting_down_ = true; |
| // Wakeup the poll loop. |
| uint64_t data = 1; |
| TEMP_FAILURE_RETRY(write(sleep_event_fd_, &data, sizeof(data))); |
| } |
| |
| // The plugin initialization function. |
| extern "C" bool ArtPlugin_Initialize() REQUIRES_SHARED(art::Locks::mutator_lock_) { |
| DCHECK(art::Runtime::Current()->GetJdwpProvider() == art::JdwpProvider::kAdbConnection); |
| // TODO Provide some way for apps to set this maybe? |
| gState = new AdbConnectionState(kDefaultJdwpAgentName); |
| CHECK(gState != nullptr); |
| return true; |
| } |
| |
| extern "C" bool ArtPlugin_Deinitialize() { |
| CHECK(gState != nullptr); |
| // Just do this a second time? |
| // TODO I don't think this should be needed. |
| gState->StopDebuggerThreads(); |
| delete gState; |
| return true; |
| } |
| |
| } // namespace adbconnection |