Merge pull request #9135 from liamwhite/service-thread-event

kernel: invert session request handling flow

src/core/hle/ipc_helpers.h

@@ -86,13 +86,13 @@ public:
         u32 num_domain_objects{};
         const bool always_move_handles{
             (static_cast<u32>(flags) & static_cast<u32>(Flags::AlwaysMoveHandles)) != 0};
-        if (!ctx.Session()->GetSessionRequestManager()->IsDomain() || always_move_handles) {
+        if (!ctx.GetManager()->IsDomain() || always_move_handles) {
             num_handles_to_move = num_objects_to_move;
         } else {
             num_domain_objects = num_objects_to_move;
         }
 
-        if (ctx.Session()->GetSessionRequestManager()->IsDomain()) {
+        if (ctx.GetManager()->IsDomain()) {
             raw_data_size +=
                 static_cast<u32>(sizeof(DomainMessageHeader) / sizeof(u32) + num_domain_objects);
             ctx.write_size += num_domain_objects;
@@ -125,8 +125,7 @@ public:
         if (!ctx.IsTipc()) {
             AlignWithPadding();
 
-            if (ctx.Session()->GetSessionRequestManager()->IsDomain() &&
+            if (ctx.GetManager()->IsDomain() && ctx.HasDomainMessageHeader()) {
-                ctx.HasDomainMessageHeader()) {
                 IPC::DomainMessageHeader domain_header{};
                 domain_header.num_objects = num_domain_objects;
                 PushRaw(domain_header);
@@ -146,18 +145,18 @@ public:
 
     template <class T>
     void PushIpcInterface(std::shared_ptr<T> iface) {
-        if (context->Session()->GetSessionRequestManager()->IsDomain()) {
+        if (context->GetManager()->IsDomain()) {
             context->AddDomainObject(std::move(iface));
         } else {
             kernel.CurrentProcess()->GetResourceLimit()->Reserve(
                 Kernel::LimitableResource::Sessions, 1);
 
             auto* session = Kernel::KSession::Create(kernel);
-            session->Initialize(nullptr, iface->GetServiceName(),
+            session->Initialize(nullptr, iface->GetServiceName());
+            iface->RegisterSession(&session->GetServerSession(),
                                    std::make_shared<Kernel::SessionRequestManager>(kernel));
 
             context->AddMoveObject(&session->GetClientSession());
-            iface->ClientConnected(&session->GetServerSession());
         }
     }
 
@@ -387,7 +386,7 @@ public:
 
     template <class T>
     std::weak_ptr<T> PopIpcInterface() {
-        ASSERT(context->Session()->GetSessionRequestManager()->IsDomain());
+        ASSERT(context->GetManager()->IsDomain());
         ASSERT(context->GetDomainMessageHeader().input_object_count > 0);
         return context->GetDomainHandler<T>(Pop<u32>() - 1);
     }

src/core/hle/kernel/hle_ipc.cpp

@@ -16,6 +16,7 @@
 #include "core/hle/kernel/k_auto_object.h"
 #include "core/hle/kernel/k_handle_table.h"
 #include "core/hle/kernel/k_process.h"
+#include "core/hle/kernel/k_server_port.h"
 #include "core/hle/kernel/k_server_session.h"
 #include "core/hle/kernel/k_thread.h"
 #include "core/hle/kernel/kernel.h"
@@ -35,7 +36,21 @@ SessionRequestHandler::SessionRequestHandler(KernelCore& kernel_, const char* se
 }
 
 SessionRequestHandler::~SessionRequestHandler() {
-    kernel.ReleaseServiceThread(service_thread);
+    kernel.ReleaseServiceThread(service_thread.lock());
+}
+
+void SessionRequestHandler::AcceptSession(KServerPort* server_port) {
+    auto* server_session = server_port->AcceptSession();
+    ASSERT(server_session != nullptr);
+
+    RegisterSession(server_session, std::make_shared<SessionRequestManager>(kernel));
+}
+
+void SessionRequestHandler::RegisterSession(KServerSession* server_session,
+                                            std::shared_ptr<SessionRequestManager> manager) {
+    manager->SetSessionHandler(shared_from_this());
+    service_thread.lock()->RegisterServerSession(server_session, manager);
+    server_session->Close();
 }
 
 SessionRequestManager::SessionRequestManager(KernelCore& kernel_) : kernel{kernel_} {}
@@ -92,7 +107,7 @@ Result SessionRequestManager::HandleDomainSyncRequest(KServerSession* server_ses
     }
 
     // Set domain handlers in HLE context, used for domain objects (IPC interfaces) as inputs
-    context.SetSessionRequestManager(server_session->GetSessionRequestManager());
+    ASSERT(context.GetManager().get() == this);
 
     // If there is a DomainMessageHeader, then this is CommandType "Request"
     const auto& domain_message_header = context.GetDomainMessageHeader();
@@ -130,31 +145,6 @@ Result SessionRequestManager::HandleDomainSyncRequest(KServerSession* server_ses
     return ResultSuccess;
 }
 
-Result SessionRequestManager::QueueSyncRequest(KSession* parent,
-                                               std::shared_ptr<HLERequestContext>&& context) {
-    // Ensure we have a session request handler
-    if (this->HasSessionRequestHandler(*context)) {
-        if (auto strong_ptr = this->GetServiceThread().lock()) {
-            strong_ptr->QueueSyncRequest(*parent, std::move(context));
-        } else {
-            ASSERT_MSG(false, "strong_ptr is nullptr!");
-        }
-    } else {
-        ASSERT_MSG(false, "handler is invalid!");
-    }
-
-    return ResultSuccess;
-}
-
-void SessionRequestHandler::ClientConnected(KServerSession* session) {
-    session->GetSessionRequestManager()->SetSessionHandler(shared_from_this());
-
-    // Ensure our server session is tracked globally.
-    kernel.RegisterServerObject(session);
-}
-
-void SessionRequestHandler::ClientDisconnected(KServerSession* session) {}
-
 HLERequestContext::HLERequestContext(KernelCore& kernel_, Core::Memory::Memory& memory_,
                                      KServerSession* server_session_, KThread* thread_)
     : server_session(server_session_), thread(thread_), kernel{kernel_}, memory{memory_} {
@@ -214,7 +204,7 @@ void HLERequestContext::ParseCommandBuffer(const KHandleTable& handle_table, u32
         // Padding to align to 16 bytes
         rp.AlignWithPadding();
 
-        if (Session()->GetSessionRequestManager()->IsDomain() &&
+        if (GetManager()->IsDomain() &&
             ((command_header->type == IPC::CommandType::Request ||
               command_header->type == IPC::CommandType::RequestWithContext) ||
              !incoming)) {
@@ -223,7 +213,7 @@ void HLERequestContext::ParseCommandBuffer(const KHandleTable& handle_table, u32
             if (incoming || domain_message_header) {
                 domain_message_header = rp.PopRaw<IPC::DomainMessageHeader>();
             } else {
-                if (Session()->GetSessionRequestManager()->IsDomain()) {
+                if (GetManager()->IsDomain()) {
                     LOG_WARNING(IPC, "Domain request has no DomainMessageHeader!");
                 }
             }
@@ -316,12 +306,11 @@ Result HLERequestContext::WriteToOutgoingCommandBuffer(KThread& requesting_threa
     // Write the domain objects to the command buffer, these go after the raw untranslated data.
     // TODO(Subv): This completely ignores C buffers.
 
-    if (server_session->GetSessionRequestManager()->IsDomain()) {
+    if (GetManager()->IsDomain()) {
         current_offset = domain_offset - static_cast<u32>(outgoing_domain_objects.size());
         for (auto& object : outgoing_domain_objects) {
-            server_session->GetSessionRequestManager()->AppendDomainHandler(std::move(object));
+            GetManager()->AppendDomainHandler(std::move(object));
-            cmd_buf[current_offset++] = static_cast<u32_le>(
+            cmd_buf[current_offset++] = static_cast<u32_le>(GetManager()->DomainHandlerCount());
-                server_session->GetSessionRequestManager()->DomainHandlerCount());
         }
     }
 

src/core/hle/kernel/hle_ipc.h

@@ -45,11 +45,13 @@ class KAutoObject;
 class KernelCore;
 class KEvent;
 class KHandleTable;
+class KServerPort;
 class KProcess;
 class KServerSession;
 class KThread;
 class KReadableEvent;
 class KSession;
+class SessionRequestManager;
 class ServiceThread;
 
 enum class ThreadWakeupReason;
@@ -76,19 +78,9 @@ public:
     virtual Result HandleSyncRequest(Kernel::KServerSession& session,
                                      Kernel::HLERequestContext& context) = 0;
 
-    /**
+    void AcceptSession(KServerPort* server_port);
-     * Signals that a client has just connected to this HLE handler and keeps the
+    void RegisterSession(KServerSession* server_session,
-     * associated ServerSession alive for the duration of the connection.
+                         std::shared_ptr<SessionRequestManager> manager);
-     * @param server_session Owning pointer to the ServerSession associated with the connection.
-     */
-    void ClientConnected(KServerSession* session);
-
-    /**
-     * Signals that a client has just disconnected from this HLE handler and releases the
-     * associated ServerSession.
-     * @param server_session ServerSession associated with the connection.
-     */
-    void ClientDisconnected(KServerSession* session);
 
     std::weak_ptr<ServiceThread> GetServiceThread() const {
         return service_thread;
@@ -170,7 +162,6 @@ public:
 
     Result HandleDomainSyncRequest(KServerSession* server_session, HLERequestContext& context);
     Result CompleteSyncRequest(KServerSession* server_session, HLERequestContext& context);
-    Result QueueSyncRequest(KSession* parent, std::shared_ptr<HLERequestContext>&& context);
 
 private:
     bool convert_to_domain{};
@@ -350,11 +341,11 @@ public:
 
     template <typename T>
     std::shared_ptr<T> GetDomainHandler(std::size_t index) const {
-        return std::static_pointer_cast<T>(manager.lock()->DomainHandler(index).lock());
+        return std::static_pointer_cast<T>(GetManager()->DomainHandler(index).lock());
     }
 
     void SetSessionRequestManager(std::weak_ptr<SessionRequestManager> manager_) {
-        manager = std::move(manager_);
+        manager = manager_;
     }
 
     std::string Description() const;
@@ -363,6 +354,10 @@ public:
         return *thread;
     }
 
+    std::shared_ptr<SessionRequestManager> GetManager() const {
+        return manager.lock();
+    }
+
 private:
     friend class IPC::ResponseBuilder;
 
@@ -396,7 +391,7 @@ private:
     u32 handles_offset{};
     u32 domain_offset{};
 
-    std::weak_ptr<SessionRequestManager> manager;
+    std::weak_ptr<SessionRequestManager> manager{};
 
     KernelCore& kernel;
     Core::Memory::Memory& memory;

src/core/hle/kernel/k_client_port.cpp

@@ -58,8 +58,7 @@ bool KClientPort::IsSignaled() const {
     return num_sessions < max_sessions;
 }
 
-Result KClientPort::CreateSession(KClientSession** out,
+Result KClientPort::CreateSession(KClientSession** out) {
-                                  std::shared_ptr<SessionRequestManager> session_manager) {
     // Reserve a new session from the resource limit.
     KScopedResourceReservation session_reservation(kernel.CurrentProcess()->GetResourceLimit(),
                                                    LimitableResource::Sessions);
@@ -104,7 +103,7 @@ Result KClientPort::CreateSession(KClientSession** out,
     }
 
     // Initialize the session.
-    session->Initialize(this, parent->GetName(), session_manager);
+    session->Initialize(this, parent->GetName());
 
     // Commit the session reservation.
     session_reservation.Commit();

src/core/hle/kernel/k_client_port.h

@@ -52,8 +52,7 @@ public:
     void Destroy() override;
     bool IsSignaled() const override;
 
-    Result CreateSession(KClientSession** out,
+    Result CreateSession(KClientSession** out);
-                         std::shared_ptr<SessionRequestManager> session_manager = nullptr);
 
 private:
     std::atomic<s32> num_sessions{};

src/core/hle/kernel/k_port.cpp

@@ -57,12 +57,6 @@ Result KPort::EnqueueSession(KServerSession* session) {
 
     server.EnqueueSession(session);
 
-    if (auto session_ptr = server.GetSessionRequestHandler().lock()) {
-        session_ptr->ClientConnected(server.AcceptSession());
-    } else {
-        ASSERT(false);
-    }
-
     return ResultSuccess;
 }
 

src/core/hle/kernel/k_server_port.cpp

@@ -61,12 +61,6 @@ void KServerPort::Destroy() {
 
     // Close our reference to our parent.
     parent->Close();
-
-    // Release host emulation members.
-    session_handler.reset();
-
-    // Ensure that the global list tracking server objects does not hold on to a reference.
-    kernel.UnregisterServerObject(this);
 }
 
 bool KServerPort::IsSignaled() const {

src/core/hle/kernel/k_server_port.h

@@ -27,24 +27,6 @@ public:
 
     void Initialize(KPort* parent_port_, std::string&& name_);
 
-    /// Whether or not this server port has an HLE handler available.
-    bool HasSessionRequestHandler() const {
-        return !session_handler.expired();
-    }
-
-    /// Gets the HLE handler for this port.
-    SessionRequestHandlerWeakPtr GetSessionRequestHandler() const {
-        return session_handler;
-    }
-
-    /**
-     * Sets the HLE handler template for the port. ServerSessions crated by connecting to this port
-     * will inherit a reference to this handler.
-     */
-    void SetSessionHandler(SessionRequestHandlerWeakPtr&& handler) {
-        session_handler = std::move(handler);
-    }
-
     void EnqueueSession(KServerSession* pending_session);
 
     KServerSession* AcceptSession();
@@ -65,7 +47,6 @@ private:
     void CleanupSessions();
 
     SessionList session_list;
-    SessionRequestHandlerWeakPtr session_handler;
     KPort* parent{};
 };
 

src/core/hle/kernel/k_server_session.cpp

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2019 yuzu Emulator Project
+// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <tuple>
@@ -33,12 +33,10 @@ KServerSession::KServerSession(KernelCore& kernel_)
 
 KServerSession::~KServerSession() = default;
 
-void KServerSession::Initialize(KSession* parent_session_, std::string&& name_,
+void KServerSession::Initialize(KSession* parent_session_, std::string&& name_) {
-                                std::shared_ptr<SessionRequestManager> manager_) {
     // Set member variables.
     parent = parent_session_;
     name = std::move(name_);
-    manager = manager_;
 }
 
 void KServerSession::Destroy() {
@@ -47,18 +45,99 @@ void KServerSession::Destroy() {
     this->CleanupRequests();
 
     parent->Close();
-
-    // Release host emulation members.
-    manager.reset();
-
-    // Ensure that the global list tracking server objects does not hold on to a reference.
-    kernel.UnregisterServerObject(this);
 }
 
 void KServerSession::OnClientClosed() {
-    if (manager && manager->HasSessionHandler()) {
+    KScopedLightLock lk{m_lock};
-        manager->SessionHandler().ClientDisconnected(this);
+
+    // Handle any pending requests.
+    KSessionRequest* prev_request = nullptr;
+    while (true) {
+        // Declare variables for processing the request.
+        KSessionRequest* request = nullptr;
+        KEvent* event = nullptr;
+        KThread* thread = nullptr;
+        bool cur_request = false;
+        bool terminate = false;
+
+        // Get the next request.
+        {
+            KScopedSchedulerLock sl{kernel};
+
+            if (m_current_request != nullptr && m_current_request != prev_request) {
+                // Set the request, open a reference as we process it.
+                request = m_current_request;
+                request->Open();
+                cur_request = true;
+
+                // Get thread and event for the request.
+                thread = request->GetThread();
+                event = request->GetEvent();
+
+                // If the thread is terminating, handle that.
+                if (thread->IsTerminationRequested()) {
+                    request->ClearThread();
+                    request->ClearEvent();
+                    terminate = true;
                 }
+
+                prev_request = request;
+            } else if (!m_request_list.empty()) {
+                // Pop the request from the front of the list.
+                request = std::addressof(m_request_list.front());
+                m_request_list.pop_front();
+
+                // Get thread and event for the request.
+                thread = request->GetThread();
+                event = request->GetEvent();
+            }
+        }
+
+        // If there are no requests, we're done.
+        if (request == nullptr) {
+            break;
+        }
+
+        // All requests must have threads.
+        ASSERT(thread != nullptr);
+
+        // Ensure that we close the request when done.
+        SCOPE_EXIT({ request->Close(); });
+
+        // If we're terminating, close a reference to the thread and event.
+        if (terminate) {
+            thread->Close();
+            if (event != nullptr) {
+                event->Close();
+            }
+        }
+
+        // If we need to, reply.
+        if (event != nullptr && !cur_request) {
+            // There must be no mappings.
+            ASSERT(request->GetSendCount() == 0);
+            ASSERT(request->GetReceiveCount() == 0);
+            ASSERT(request->GetExchangeCount() == 0);
+
+            // // Get the process and page table.
+            // KProcess *client_process = thread->GetOwnerProcess();
+            // auto &client_pt = client_process->GetPageTable();
+
+            // // Reply to the request.
+            // ReplyAsyncError(client_process, request->GetAddress(), request->GetSize(),
+            //                 ResultSessionClosed);
+
+            // // Unlock the buffer.
+            // // NOTE: Nintendo does not check the result of this.
+            // client_pt.UnlockForIpcUserBuffer(request->GetAddress(), request->GetSize());
+
+            // Signal the event.
+            event->Signal();
+        }
+    }
+
+    // Notify.
+    this->NotifyAvailable(ResultSessionClosed);
 }
 
 bool KServerSession::IsSignaled() const {
@@ -73,24 +152,6 @@ bool KServerSession::IsSignaled() const {
     return !m_request_list.empty() && m_current_request == nullptr;
 }
 
-Result KServerSession::QueueSyncRequest(KThread* thread, Core::Memory::Memory& memory) {
-    u32* cmd_buf{reinterpret_cast<u32*>(memory.GetPointer(thread->GetTLSAddress()))};
-    auto context = std::make_shared<HLERequestContext>(kernel, memory, this, thread);
-
-    context->PopulateFromIncomingCommandBuffer(kernel.CurrentProcess()->GetHandleTable(), cmd_buf);
-
-    return manager->QueueSyncRequest(parent, std::move(context));
-}
-
-Result KServerSession::CompleteSyncRequest(HLERequestContext& context) {
-    Result result = manager->CompleteSyncRequest(this, context);
-
-    // The calling thread is waiting for this request to complete, so wake it up.
-    context.GetThread().EndWait(result);
-
-    return result;
-}
-
 Result KServerSession::OnRequest(KSessionRequest* request) {
     // Create the wait queue.
     ThreadQueueImplForKServerSessionRequest wait_queue{kernel};
@@ -105,13 +166,6 @@ Result KServerSession::OnRequest(KSessionRequest* request) {
         // Check that we're not terminating.
         R_UNLESS(!GetCurrentThread(kernel).IsTerminationRequested(), ResultTerminationRequested);
 
-        if (manager) {
-            // HLE request.
-            auto& memory{kernel.System().Memory()};
-            this->QueueSyncRequest(GetCurrentThreadPointer(kernel), memory);
-        } else {
-            // Non-HLE request.
-
         // Get whether we're empty.
         const bool was_empty = m_request_list.empty();
 
@@ -123,7 +177,6 @@ Result KServerSession::OnRequest(KSessionRequest* request) {
         if (was_empty) {
             this->NotifyAvailable();
         }
-        }
 
         // If we have a request event, this is asynchronous, and we don't need to wait.
         R_SUCCEED_IF(request->GetEvent() != nullptr);
@@ -136,7 +189,7 @@ Result KServerSession::OnRequest(KSessionRequest* request) {
     return GetCurrentThread(kernel).GetWaitResult();
 }
 
-Result KServerSession::SendReply() {
+Result KServerSession::SendReply(bool is_hle) {
     // Lock the session.
     KScopedLightLock lk{m_lock};
 
@@ -171,6 +224,10 @@ Result KServerSession::SendReply() {
     Result result = ResultSuccess;
     if (!closed) {
         // If we're not closed, send the reply.
+        if (is_hle) {
+            // HLE servers write directly to a pointer to the thread command buffer. Therefore
+            // the reply has already been written in this case.
+        } else {
             Core::Memory::Memory& memory{kernel.System().Memory()};
             KThread* server_thread{GetCurrentThreadPointer(kernel)};
             UNIMPLEMENTED_IF(server_thread->GetOwnerProcess() != client_thread->GetOwnerProcess());
@@ -178,6 +235,7 @@ Result KServerSession::SendReply() {
             auto* src_msg_buffer = memory.GetPointer(server_thread->GetTLSAddress());
             auto* dst_msg_buffer = memory.GetPointer(client_message);
             std::memcpy(dst_msg_buffer, src_msg_buffer, client_buffer_size);
+        }
     } else {
         result = ResultSessionClosed;
     }
@@ -223,7 +281,8 @@ Result KServerSession::SendReply() {
     return result;
 }
 
-Result KServerSession::ReceiveRequest() {
+Result KServerSession::ReceiveRequest(std::shared_ptr<HLERequestContext>* out_context,
+                                      std::weak_ptr<SessionRequestManager> manager) {
     // Lock the session.
     KScopedLightLock lk{m_lock};
 
@@ -267,12 +326,22 @@ Result KServerSession::ReceiveRequest() {
 
     // Receive the message.
     Core::Memory::Memory& memory{kernel.System().Memory()};
+    if (out_context != nullptr) {
+        // HLE request.
+        u32* cmd_buf{reinterpret_cast<u32*>(memory.GetPointer(client_message))};
+        *out_context = std::make_shared<HLERequestContext>(kernel, memory, this, client_thread);
+        (*out_context)->SetSessionRequestManager(manager);
+        (*out_context)
+            ->PopulateFromIncomingCommandBuffer(client_thread->GetOwnerProcess()->GetHandleTable(),
+                                                cmd_buf);
+    } else {
         KThread* server_thread{GetCurrentThreadPointer(kernel)};
         UNIMPLEMENTED_IF(server_thread->GetOwnerProcess() != client_thread->GetOwnerProcess());
 
         auto* src_msg_buffer = memory.GetPointer(client_message);
         auto* dst_msg_buffer = memory.GetPointer(server_thread->GetTLSAddress());
         std::memcpy(dst_msg_buffer, src_msg_buffer, client_buffer_size);
+    }
 
     // We succeeded.
     return ResultSuccess;

src/core/hle/kernel/k_server_session.h

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2019 yuzu Emulator Project
+// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #pragma once
@@ -16,21 +16,11 @@
 #include "core/hle/kernel/k_synchronization_object.h"
 #include "core/hle/result.h"
 
-namespace Core::Memory {
-class Memory;
-}
-
-namespace Core::Timing {
-class CoreTiming;
-struct EventType;
-} // namespace Core::Timing
-
 namespace Kernel {
 
 class HLERequestContext;
 class KernelCore;
 class KSession;
-class SessionRequestHandler;
 class SessionRequestManager;
 class KThread;
 
@@ -46,8 +36,7 @@ public:
 
     void Destroy() override;
 
-    void Initialize(KSession* parent_session_, std::string&& name_,
+    void Initialize(KSession* parent_session_, std::string&& name_);
-                    std::shared_ptr<SessionRequestManager> manager_);
 
     KSession* GetParent() {
         return parent;
@@ -60,32 +49,20 @@ public:
     bool IsSignaled() const override;
     void OnClientClosed();
 
-    /// Gets the session request manager, which forwards requests to the underlying service
-    std::shared_ptr<SessionRequestManager>& GetSessionRequestManager() {
-        return manager;
-    }
-
     /// TODO: flesh these out to match the real kernel
     Result OnRequest(KSessionRequest* request);
-    Result SendReply();
+    Result SendReply(bool is_hle = false);
-    Result ReceiveRequest();
+    Result ReceiveRequest(std::shared_ptr<HLERequestContext>* out_context = nullptr,
+                          std::weak_ptr<SessionRequestManager> manager = {});
+
+    Result SendReplyHLE() {
+        return SendReply(true);
+    }
 
 private:
     /// Frees up waiting client sessions when this server session is about to die
     void CleanupRequests();
 
-    /// Queues a sync request from the emulated application.
-    Result QueueSyncRequest(KThread* thread, Core::Memory::Memory& memory);
-
-    /// Completes a sync request from the emulated application.
-    Result CompleteSyncRequest(HLERequestContext& context);
-
-    /// This session's HLE request handlers; if nullptr, this is not an HLE server
-    std::shared_ptr<SessionRequestManager> manager;
-
-    /// When set to True, converts the session to a domain at the end of the command
-    bool convert_to_domain{};
-
     /// KSession that owns this KServerSession
     KSession* parent{};
 

src/core/hle/kernel/k_session.cpp

@@ -13,8 +13,7 @@ KSession::KSession(KernelCore& kernel_)
     : KAutoObjectWithSlabHeapAndContainer{kernel_}, server{kernel_}, client{kernel_} {}
 KSession::~KSession() = default;
 
-void KSession::Initialize(KClientPort* port_, const std::string& name_,
+void KSession::Initialize(KClientPort* port_, const std::string& name_) {
-                          std::shared_ptr<SessionRequestManager> manager_) {
     // Increment reference count.
     // Because reference count is one on creation, this will result
     // in a reference count of two. Thus, when both server and client are closed
@@ -26,7 +25,7 @@ void KSession::Initialize(KClientPort* port_, const std::string& name_,
     KAutoObject::Create(std::addressof(client));
 
     // Initialize our sub sessions.
-    server.Initialize(this, name_ + ":Server", manager_);
+    server.Initialize(this, name_ + ":Server");
     client.Initialize(this, name_ + ":Client");
 
     // Set state and name.

src/core/hle/kernel/k_session.h

@@ -21,8 +21,7 @@ public:
     explicit KSession(KernelCore& kernel_);
     ~KSession() override;
 
-    void Initialize(KClientPort* port_, const std::string& name_,
+    void Initialize(KClientPort* port_, const std::string& name_);
-                    std::shared_ptr<SessionRequestManager> manager_ = nullptr);
 
     void Finalize() override;
 

src/core/hle/kernel/kernel.cpp

@@ -60,7 +60,6 @@ struct KernelCore::Impl {
         global_scheduler_context = std::make_unique<Kernel::GlobalSchedulerContext>(kernel);
         global_handle_table = std::make_unique<Kernel::KHandleTable>(kernel);
         global_handle_table->Initialize(KHandleTable::MaxTableSize);
-        default_service_thread = CreateServiceThread(kernel, "DefaultServiceThread");
 
         is_phantom_mode_for_singlecore = false;
 
@@ -86,6 +85,8 @@ struct KernelCore::Impl {
         }
 
         RegisterHostThread();
+
+        default_service_thread = CreateServiceThread(kernel, "DefaultServiceThread");
     }
 
     void InitializeCores() {
@@ -184,17 +185,6 @@ struct KernelCore::Impl {
     }
 
     void CloseServices() {
-        // Close all open server sessions and ports.
-        std::unordered_set<KAutoObject*> server_objects_;
-        {
-            std::scoped_lock lk(server_objects_lock);
-            server_objects_ = server_objects;
-            server_objects.clear();
-        }
-        for (auto* server_object : server_objects_) {
-            server_object->Close();
-        }
-
         // Ensures all service threads gracefully shutdown.
         ClearServiceThreads();
     }
@@ -346,6 +336,8 @@ struct KernelCore::Impl {
         return this_id;
     }
 
+    static inline thread_local bool is_phantom_mode_for_singlecore{false};
+
     bool IsPhantomModeForSingleCore() const {
         return is_phantom_mode_for_singlecore;
     }
@@ -698,24 +690,21 @@ struct KernelCore::Impl {
             return {};
         }
 
-        KClientPort* port = &search->second(system.ServiceManager(), system);
+        return &search->second(system.ServiceManager(), system);
-        RegisterServerObject(&port->GetParent()->GetServerPort());
-        return port;
     }
 
-    void RegisterServerObject(KAutoObject* server_object) {
+    void RegisterNamedServiceHandler(std::string name, KServerPort* server_port) {
-        std::scoped_lock lk(server_objects_lock);
+        auto search = service_interface_handlers.find(name);
-        server_objects.insert(server_object);
+        if (search == service_interface_handlers.end()) {
+            return;
         }
 
-    void UnregisterServerObject(KAutoObject* server_object) {
+        search->second(system.ServiceManager(), server_port);
-        std::scoped_lock lk(server_objects_lock);
-        server_objects.erase(server_object);
     }
 
     std::weak_ptr<Kernel::ServiceThread> CreateServiceThread(KernelCore& kernel,
                                                              const std::string& name) {
-        auto service_thread = std::make_shared<Kernel::ServiceThread>(kernel, 1, name);
+        auto service_thread = std::make_shared<Kernel::ServiceThread>(kernel, name);
 
         service_threads_manager.QueueWork(
             [this, service_thread]() { service_threads.emplace(service_thread); });
@@ -745,7 +734,6 @@ struct KernelCore::Impl {
         service_thread_barrier.Sync();
     }
 
-    std::mutex server_objects_lock;
     std::mutex registered_objects_lock;
     std::mutex registered_in_use_objects_lock;
 
@@ -774,8 +762,8 @@ struct KernelCore::Impl {
     /// Map of named ports managed by the kernel, which can be retrieved using
     /// the ConnectToPort SVC.
     std::unordered_map<std::string, ServiceInterfaceFactory> service_interface_factory;
+    std::unordered_map<std::string, ServiceInterfaceHandlerFn> service_interface_handlers;
     NamedPortTable named_ports;
-    std::unordered_set<KAutoObject*> server_objects;
     std::unordered_set<KAutoObject*> registered_objects;
     std::unordered_set<KAutoObject*> registered_in_use_objects;
 
@@ -814,7 +802,6 @@ struct KernelCore::Impl {
 
     bool is_multicore{};
     std::atomic_bool is_shutting_down{};
-    bool is_phantom_mode_for_singlecore{};
     u32 single_core_thread_id{};
 
     std::array<u64, Core::Hardware::NUM_CPU_CORES> svc_ticks{};
@@ -981,16 +968,17 @@ void KernelCore::RegisterNamedService(std::string name, ServiceInterfaceFactory&
     impl->service_interface_factory.emplace(std::move(name), factory);
 }
 
+void KernelCore::RegisterInterfaceForNamedService(std::string name,
+                                                  ServiceInterfaceHandlerFn&& handler) {
+    impl->service_interface_handlers.emplace(std::move(name), handler);
+}
+
 KClientPort* KernelCore::CreateNamedServicePort(std::string name) {
     return impl->CreateNamedServicePort(std::move(name));
 }
 
-void KernelCore::RegisterServerObject(KAutoObject* server_object) {
+void KernelCore::RegisterNamedServiceHandler(std::string name, KServerPort* server_port) {
-    impl->RegisterServerObject(server_object);
+    impl->RegisterNamedServiceHandler(std::move(name), server_port);
-}
-
-void KernelCore::UnregisterServerObject(KAutoObject* server_object) {
-    impl->UnregisterServerObject(server_object);
 }
 
 void KernelCore::RegisterKernelObject(KAutoObject* object) {

src/core/hle/kernel/kernel.h

@@ -45,6 +45,7 @@ class KPort;
 class KProcess;
 class KResourceLimit;
 class KScheduler;
+class KServerPort;
 class KServerSession;
 class KSession;
 class KSessionRequest;
@@ -63,6 +64,8 @@ class TimeManager;
 using ServiceInterfaceFactory =
     std::function<KClientPort&(Service::SM::ServiceManager&, Core::System&)>;
 
+using ServiceInterfaceHandlerFn = std::function<void(Service::SM::ServiceManager&, KServerPort*)>;
+
 namespace Init {
 struct KSlabResourceCounts;
 }
@@ -192,16 +195,14 @@ public:
     /// Registers a named HLE service, passing a factory used to open a port to that service.
     void RegisterNamedService(std::string name, ServiceInterfaceFactory&& factory);
 
+    /// Registers a setup function for the named HLE service.
+    void RegisterInterfaceForNamedService(std::string name, ServiceInterfaceHandlerFn&& handler);
+
     /// Opens a port to a service previously registered with RegisterNamedService.
     KClientPort* CreateNamedServicePort(std::string name);
 
-    /// Registers a server session or port with the gobal emulation state, to be freed on shutdown.
+    /// Accepts a session on a port created by CreateNamedServicePort.
-    /// This is necessary because we do not emulate processes for HLE sessions and ports.
+    void RegisterNamedServiceHandler(std::string name, KServerPort* server_port);
-    void RegisterServerObject(KAutoObject* server_object);
-
-    /// Unregisters a server session or port previously registered with RegisterServerSession when
-    /// it was destroyed during the current emulation session.
-    void UnregisterServerObject(KAutoObject* server_object);
 
     /// Registers all kernel objects with the global emulation state, this is purely for tracking
     /// leaks after emulation has been shutdown.

src/core/hle/kernel/service_thread.cpp

@@ -1,15 +1,18 @@
-// SPDX-FileCopyrightText: Copyright 2020 yuzu Emulator Project
+// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
-#include <condition_variable>
 #include <functional>
+#include <map>
 #include <mutex>
 #include <thread>
 #include <vector>
-#include <queue>
 
 #include "common/scope_exit.h"
 #include "common/thread.h"
+#include "core/hle/ipc_helpers.h"
+#include "core/hle/kernel/hle_ipc.h"
+#include "core/hle/kernel/k_event.h"
+#include "core/hle/kernel/k_scoped_resource_reservation.h"
 #include "core/hle/kernel/k_session.h"
 #include "core/hle/kernel/k_thread.h"
 #include "core/hle/kernel/kernel.h"
@@ -19,101 +22,198 @@ namespace Kernel {
 
 class ServiceThread::Impl final {
 public:
-    explicit Impl(KernelCore& kernel, std::size_t num_threads, const std::string& name);
+    explicit Impl(KernelCore& kernel, const std::string& service_name);
     ~Impl();
 
-    void QueueSyncRequest(KSession& session, std::shared_ptr<HLERequestContext>&& context);
+    void WaitAndProcessImpl();
+    void SessionClosed(KServerSession* server_session,
+                       std::shared_ptr<SessionRequestManager> manager);
+    void LoopProcess();
+
+    void RegisterServerSession(KServerSession* session,
+                               std::shared_ptr<SessionRequestManager> manager);
 
 private:
-    std::vector<std::jthread> threads;
+    KernelCore& kernel;
-    std::queue<std::function<void()>> requests;
+
-    std::mutex queue_mutex;
+    std::jthread m_thread;
-    std::condition_variable_any condition;
+    std::mutex m_session_mutex;
-    const std::string service_name;
+    std::map<KServerSession*, std::shared_ptr<SessionRequestManager>> m_sessions;
+    KEvent* m_wakeup_event;
+    KProcess* m_process;
+    std::atomic<bool> m_shutdown_requested;
+    const std::string m_service_name;
 };
 
-ServiceThread::Impl::Impl(KernelCore& kernel, std::size_t num_threads, const std::string& name)
+void ServiceThread::Impl::WaitAndProcessImpl() {
-    : service_name{name} {
+    // Create local list of waitable sessions.
-    for (std::size_t i = 0; i < num_threads; ++i) {
+    std::vector<KSynchronizationObject*> objs;
-        threads.emplace_back([this, &kernel](std::stop_token stop_token) {
+    std::vector<std::shared_ptr<SessionRequestManager>> managers;
-            Common::SetCurrentThreadName(std::string{service_name}.c_str());
 
-            // Wait for first request before trying to acquire a render context
     {
-                std::unique_lock lock{queue_mutex};
+        // Lock to get the set.
-                condition.wait(lock, stop_token, [this] { return !requests.empty(); });
+        std::scoped_lock lk{m_session_mutex};
+
+        // Reserve the needed quantity.
+        objs.reserve(m_sessions.size() + 1);
+        managers.reserve(m_sessions.size());
+
+        // Copy to our local list.
+        for (const auto& [session, manager] : m_sessions) {
+            objs.push_back(session);
+            managers.push_back(manager);
         }
 
-            if (stop_token.stop_requested()) {
+        // Insert the wakeup event at the end.
+        objs.push_back(&m_wakeup_event->GetReadableEvent());
+    }
+
+    // Wait on the list of sessions.
+    s32 index{-1};
+    Result rc = KSynchronizationObject::Wait(kernel, &index, objs.data(),
+                                             static_cast<s32>(objs.size()), -1);
+    ASSERT(!rc.IsFailure());
+
+    // If this was the wakeup event, clear it and finish.
+    if (index >= static_cast<s64>(objs.size() - 1)) {
+        m_wakeup_event->Clear();
         return;
     }
 
-            // Allocate a dummy guest thread for this host thread.
+    // This event is from a server session.
+    auto* server_session = static_cast<KServerSession*>(objs[index]);
+    auto& manager = managers[index];
+
+    // Fetch the HLE request context.
+    std::shared_ptr<HLERequestContext> context;
+    rc = server_session->ReceiveRequest(&context, manager);
+
+    // If the session was closed, handle that.
+    if (rc == ResultSessionClosed) {
+        SessionClosed(server_session, manager);
+
+        // Finish.
+        return;
+    }
+
+    // TODO: handle other cases
+    ASSERT(rc == ResultSuccess);
+
+    // Perform the request.
+    Result service_rc = manager->CompleteSyncRequest(server_session, *context);
+
+    // Reply to the client.
+    rc = server_session->SendReplyHLE();
+
+    if (rc == ResultSessionClosed || service_rc == IPC::ERR_REMOTE_PROCESS_DEAD) {
+        SessionClosed(server_session, manager);
+        return;
+    }
+
+    // TODO: handle other cases
+    ASSERT(rc == ResultSuccess);
+    ASSERT(service_rc == ResultSuccess);
+}
+
+void ServiceThread::Impl::SessionClosed(KServerSession* server_session,
+                                        std::shared_ptr<SessionRequestManager> manager) {
+    {
+        // Lock to get the set.
+        std::scoped_lock lk{m_session_mutex};
+
+        // Erase the session.
+        ASSERT(m_sessions.erase(server_session) == 1);
+    }
+
+    // Close our reference to the server session.
+    server_session->Close();
+}
+
+void ServiceThread::Impl::LoopProcess() {
+    Common::SetCurrentThreadName(m_service_name.c_str());
+
     kernel.RegisterHostThread();
 
-            while (true) {
+    while (!m_shutdown_requested.load()) {
-                std::function<void()> task;
+        WaitAndProcessImpl();
-
-                {
-                    std::unique_lock lock{queue_mutex};
-                    condition.wait(lock, stop_token, [this] { return !requests.empty(); });
-
-                    if (stop_token.stop_requested()) {
-                        return;
-                    }
-
-                    if (requests.empty()) {
-                        continue;
-                    }
-
-                    task = std::move(requests.front());
-                    requests.pop();
-                }
-
-                task();
-            }
-        });
     }
 }
 
-void ServiceThread::Impl::QueueSyncRequest(KSession& session,
+void ServiceThread::Impl::RegisterServerSession(KServerSession* server_session,
-                                           std::shared_ptr<HLERequestContext>&& context) {
+                                                std::shared_ptr<SessionRequestManager> manager) {
-    {
+    // Open the server session.
-        std::unique_lock lock{queue_mutex};
-
-        auto* server_session{&session.GetServerSession()};
-
-        // Open a reference to the session to ensure it is not closes while the service request
-        // completes asynchronously.
     server_session->Open();
 
-        requests.emplace([server_session, context{std::move(context)}]() {
+    {
-            // Close the reference.
+        // Lock to get the set.
-            SCOPE_EXIT({ server_session->Close(); });
+        std::scoped_lock lk{m_session_mutex};
 
-            // Complete the service request.
+        // Insert the session and manager.
-            server_session->CompleteSyncRequest(*context);
+        m_sessions[server_session] = manager;
-        });
     }
-    condition.notify_one();
+
+    // Signal the wakeup event.
+    m_wakeup_event->Signal();
 }
 
 ServiceThread::Impl::~Impl() {
-    condition.notify_all();
+    // Shut down the processing thread.
-    for (auto& thread : threads) {
+    m_shutdown_requested.store(true);
-        thread.request_stop();
+    m_wakeup_event->Signal();
-        thread.join();
+    m_thread.join();
+
+    // Lock mutex.
+    m_session_mutex.lock();
+
+    // Close all remaining sessions.
+    for (const auto& [server_session, manager] : m_sessions) {
+        server_session->Close();
     }
+
+    // Destroy remaining managers.
+    m_sessions.clear();
+
+    // Close event.
+    m_wakeup_event->GetReadableEvent().Close();
+    m_wakeup_event->Close();
+
+    // Close process.
+    m_process->Close();
 }
 
-ServiceThread::ServiceThread(KernelCore& kernel, std::size_t num_threads, const std::string& name)
+ServiceThread::Impl::Impl(KernelCore& kernel_, const std::string& service_name)
-    : impl{std::make_unique<Impl>(kernel, num_threads, name)} {}
+    : kernel{kernel_}, m_service_name{service_name} {
+    // Initialize process.
+    m_process = KProcess::Create(kernel);
+    KProcess::Initialize(m_process, kernel.System(), service_name,
+                         KProcess::ProcessType::KernelInternal, kernel.GetSystemResourceLimit());
+
+    // Reserve a new event from the process resource limit
+    KScopedResourceReservation event_reservation(m_process, LimitableResource::Events);
+    ASSERT(event_reservation.Succeeded());
+
+    // Initialize event.
+    m_wakeup_event = KEvent::Create(kernel);
+    m_wakeup_event->Initialize(m_process);
+
+    // Commit the event reservation.
+    event_reservation.Commit();
+
+    // Register the event.
+    KEvent::Register(kernel, m_wakeup_event);
+
+    // Start thread.
+    m_thread = std::jthread([this] { LoopProcess(); });
+}
+
+ServiceThread::ServiceThread(KernelCore& kernel, const std::string& name)
+    : impl{std::make_unique<Impl>(kernel, name)} {}
 
 ServiceThread::~ServiceThread() = default;
 
-void ServiceThread::QueueSyncRequest(KSession& session,
+void ServiceThread::RegisterServerSession(KServerSession* session,
-                                     std::shared_ptr<HLERequestContext>&& context) {
+                                          std::shared_ptr<SessionRequestManager> manager) {
-    impl->QueueSyncRequest(session, std::move(context));
+    impl->RegisterServerSession(session, manager);
 }
 
 } // namespace Kernel

src/core/hle/kernel/service_thread.h

@@ -11,13 +11,15 @@ namespace Kernel {
 class HLERequestContext;
 class KernelCore;
 class KSession;
+class SessionRequestManager;
 
 class ServiceThread final {
 public:
-    explicit ServiceThread(KernelCore& kernel, std::size_t num_threads, const std::string& name);
+    explicit ServiceThread(KernelCore& kernel, const std::string& name);
     ~ServiceThread();
 
-    void QueueSyncRequest(KSession& session, std::shared_ptr<HLERequestContext>&& context);
+    void RegisterServerSession(KServerSession* session,
+                               std::shared_ptr<SessionRequestManager> manager);
 
 private:
     class Impl;

src/core/hle/kernel/svc.cpp

@@ -24,6 +24,7 @@
 #include "core/hle/kernel/k_memory_block.h"
 #include "core/hle/kernel/k_memory_layout.h"
 #include "core/hle/kernel/k_page_table.h"
+#include "core/hle/kernel/k_port.h"
 #include "core/hle/kernel/k_process.h"
 #include "core/hle/kernel/k_readable_event.h"
 #include "core/hle/kernel/k_resource_limit.h"
@@ -382,9 +383,9 @@ static Result ConnectToNamedPort(Core::System& system, Handle* out, VAddr port_n
 
     // Create a session.
     KClientSession* session{};
-    R_TRY(port->CreateSession(std::addressof(session),
+    R_TRY(port->CreateSession(std::addressof(session)));
-                              std::make_shared<SessionRequestManager>(kernel)));
+
-    port->Close();
+    kernel.RegisterNamedServiceHandler(port_name, &port->GetParent()->GetServerPort());
 
     // Register the session in the table, close the extra reference.
     handle_table.Register(*out, session);

src/core/hle/service/service.cpp

@@ -99,6 +99,12 @@ ServiceFrameworkBase::ServiceFrameworkBase(Core::System& system_, const char* se
 ServiceFrameworkBase::~ServiceFrameworkBase() {
     // Wait for other threads to release access before destroying
     const auto guard = LockService();
+
+    if (named_port != nullptr) {
+        named_port->GetClientPort().Close();
+        named_port->GetServerPort().Close();
+        named_port = nullptr;
+    }
 }
 
 void ServiceFrameworkBase::InstallAsService(SM::ServiceManager& service_manager) {
@@ -113,15 +119,16 @@ void ServiceFrameworkBase::InstallAsService(SM::ServiceManager& service_manager)
 Kernel::KClientPort& ServiceFrameworkBase::CreatePort() {
     const auto guard = LockService();
 
+    if (named_port == nullptr) {
         ASSERT(!service_registered);
 
-    auto* port = Kernel::KPort::Create(kernel);
+        named_port = Kernel::KPort::Create(kernel);
-    port->Initialize(max_sessions, false, service_name);
+        named_port->Initialize(max_sessions, false, service_name);
-    port->GetServerPort().SetSessionHandler(shared_from_this());
 
         service_registered = true;
+    }
 
-    return port->GetClientPort();
+    return named_port->GetClientPort();
 }
 
 void ServiceFrameworkBase::RegisterHandlersBase(const FunctionInfoBase* functions, std::size_t n) {
@@ -199,7 +206,6 @@ Result ServiceFrameworkBase::HandleSyncRequest(Kernel::KServerSession& session,
     switch (ctx.GetCommandType()) {
     case IPC::CommandType::Close:
     case IPC::CommandType::TIPC_Close: {
-        session.Close();
         IPC::ResponseBuilder rb{ctx, 2};
         rb.Push(ResultSuccess);
         result = IPC::ERR_REMOTE_PROCESS_DEAD;
@@ -244,6 +250,7 @@ Services::Services(std::shared_ptr<SM::ServiceManager>& sm, Core::System& system
     system.GetFileSystemController().CreateFactories(*system.GetFilesystem(), false);
 
     system.Kernel().RegisterNamedService("sm:", SM::ServiceManager::InterfaceFactory);
+    system.Kernel().RegisterInterfaceForNamedService("sm:", SM::ServiceManager::SessionHandler);
 
     Account::InstallInterfaces(system);
     AM::InstallInterfaces(*sm, *nv_flinger, system);

src/core/hle/service/service.h

@@ -20,6 +20,7 @@ class System;
 namespace Kernel {
 class HLERequestContext;
 class KClientPort;
+class KPort;
 class KServerSession;
 class ServiceThread;
 } // namespace Kernel
@@ -98,6 +99,9 @@ protected:
     /// Identifier string used to connect to the service.
     std::string service_name;
 
+    /// Port used by ManageNamedPort.
+    Kernel::KPort* named_port{};
+
 private:
     template <typename T>
     friend class ServiceFramework;

src/core/hle/service/sm/sm.cpp

@@ -23,7 +23,13 @@ constexpr Result ERR_INVALID_NAME(ErrorModule::SM, 6);
 constexpr Result ERR_SERVICE_NOT_REGISTERED(ErrorModule::SM, 7);
 
 ServiceManager::ServiceManager(Kernel::KernelCore& kernel_) : kernel{kernel_} {}
-ServiceManager::~ServiceManager() = default;
+
+ServiceManager::~ServiceManager() {
+    for (auto& [name, port] : service_ports) {
+        port->GetClientPort().Close();
+        port->GetServerPort().Close();
+    }
+}
 
 void ServiceManager::InvokeControlRequest(Kernel::HLERequestContext& context) {
     controller_interface->InvokeRequest(context);
@@ -43,6 +49,10 @@ Kernel::KClientPort& ServiceManager::InterfaceFactory(ServiceManager& self, Core
     return self.sm_interface->CreatePort();
 }
 
+void ServiceManager::SessionHandler(ServiceManager& self, Kernel::KServerPort* server_port) {
+    self.sm_interface->AcceptSession(server_port);
+}
+
 Result ServiceManager::RegisterService(std::string name, u32 max_sessions,
                                        Kernel::SessionRequestHandlerPtr handler) {
 
@@ -53,7 +63,11 @@ Result ServiceManager::RegisterService(std::string name, u32 max_sessions,
         return ERR_ALREADY_REGISTERED;
     }
 
-    registered_services.emplace(std::move(name), handler);
+    auto* port = Kernel::KPort::Create(kernel);
+    port->Initialize(ServerSessionCountMax, false, name);
+
+    service_ports.emplace(name, port);
+    registered_services.emplace(name, handler);
 
     return ResultSuccess;
 }
@@ -68,24 +82,20 @@ Result ServiceManager::UnregisterService(const std::string& name) {
     }
 
     registered_services.erase(iter);
+    service_ports.erase(name);
+
     return ResultSuccess;
 }
 
 ResultVal<Kernel::KPort*> ServiceManager::GetServicePort(const std::string& name) {
     CASCADE_CODE(ValidateServiceName(name));
-    auto it = registered_services.find(name);
+    auto it = service_ports.find(name);
-    if (it == registered_services.end()) {
+    if (it == service_ports.end()) {
         LOG_ERROR(Service_SM, "Server is not registered! service={}", name);
         return ERR_SERVICE_NOT_REGISTERED;
     }
 
-    auto* port = Kernel::KPort::Create(kernel);
+    return it->second;
-
-    port->Initialize(ServerSessionCountMax, false, name);
-    auto handler = it->second;
-    port->GetServerPort().SetSessionHandler(std::move(handler));
-
-    return port;
 }
 
 /**
@@ -144,24 +154,20 @@ ResultVal<Kernel::KClientSession*> SM::GetServiceImpl(Kernel::HLERequestContext&
 
     // Find the named port.
     auto port_result = service_manager.GetServicePort(name);
-    if (port_result.Failed()) {
+    auto service = service_manager.GetService<Kernel::SessionRequestHandler>(name);
+    if (port_result.Failed() || !service) {
         LOG_ERROR(Service_SM, "called service={} -> error 0x{:08X}", name, port_result.Code().raw);
         return port_result.Code();
     }
     auto& port = port_result.Unwrap();
-    SCOPE_EXIT({
-        port->GetClientPort().Close();
-        port->GetServerPort().Close();
-    });
 
     // Create a new session.
     Kernel::KClientSession* session{};
-    if (const auto result = port->GetClientPort().CreateSession(
+    if (const auto result = port->GetClientPort().CreateSession(&session); result.IsError()) {
-            std::addressof(session), std::make_shared<Kernel::SessionRequestManager>(kernel));
-        result.IsError()) {
         LOG_ERROR(Service_SM, "called service={} -> error 0x{:08X}", name, result.raw);
         return result;
     }
+    service->AcceptSession(&port->GetServerPort());
 
     LOG_DEBUG(Service_SM, "called service={} -> session={}", name, session->GetId());
 

src/core/hle/service/sm/sm.h

@@ -51,6 +51,7 @@ private:
 class ServiceManager {
 public:
     static Kernel::KClientPort& InterfaceFactory(ServiceManager& self, Core::System& system);
+    static void SessionHandler(ServiceManager& self, Kernel::KServerPort* server_port);
 
     explicit ServiceManager(Kernel::KernelCore& kernel_);
     ~ServiceManager();
@@ -78,6 +79,7 @@ private:
 
     /// Map of registered services, retrieved using GetServicePort.
     std::unordered_map<std::string, Kernel::SessionRequestHandlerPtr> registered_services;
+    std::unordered_map<std::string, Kernel::KPort*> service_ports;
 
     /// Kernel context
     Kernel::KernelCore& kernel;

src/core/hle/service/sm/sm_controller.cpp

@@ -15,10 +15,9 @@
 namespace Service::SM {
 
 void Controller::ConvertCurrentObjectToDomain(Kernel::HLERequestContext& ctx) {
-    ASSERT_MSG(!ctx.Session()->GetSessionRequestManager()->IsDomain(),
+    ASSERT_MSG(!ctx.GetManager()->IsDomain(), "Session is already a domain");
-               "Session is already a domain");
     LOG_DEBUG(Service, "called, server_session={}", ctx.Session()->GetId());
-    ctx.Session()->GetSessionRequestManager()->ConvertToDomainOnRequestEnd();
+    ctx.GetManager()->ConvertToDomainOnRequestEnd();
 
     IPC::ResponseBuilder rb{ctx, 3};
     rb.Push(ResultSuccess);
@@ -29,9 +28,7 @@ void Controller::CloneCurrentObject(Kernel::HLERequestContext& ctx) {
     LOG_DEBUG(Service, "called");
 
     auto& process = *ctx.GetThread().GetOwnerProcess();
-    auto& parent_session = *ctx.Session()->GetParent();
+    auto session_manager = ctx.GetManager();
-    auto& session_manager = parent_session.GetServerSession().GetSessionRequestManager();
-    auto& session_handler = session_manager->SessionHandler();
 
     // FIXME: this is duplicated from the SVC, it should just call it instead
     // once this is a proper process
@@ -46,13 +43,14 @@ void Controller::CloneCurrentObject(Kernel::HLERequestContext& ctx) {
     ASSERT(session != nullptr);
 
     // Initialize the session.
-    session->Initialize(nullptr, parent_session.GetName(), session_manager);
+    session->Initialize(nullptr, "");
 
     // Commit the session reservation.
     session_reservation.Commit();
 
-    // Register the session.
+    // Register with manager.
-    session_handler.ClientConnected(&session->GetServerSession());
+    session_manager->SessionHandler().RegisterSession(&session->GetServerSession(),
+                                                      session_manager);
 
     // We succeeded.
     IPC::ResponseBuilder rb{ctx, 2, 0, 1, IPC::ResponseBuilder::Flags::AlwaysMoveHandles};