From 77b74f5d95626422f59b508cd2b355135ed256ca Mon Sep 17 00:00:00 2001
From: Liam <byteslice@airmail.cc>
Date: Sun, 30 Oct 2022 22:22:14 -0400
Subject: sm:: avoid excessive port recreation

---
 src/core/hle/service/service.cpp | 10 ++++++----
 src/core/hle/service/sm/sm.cpp   | 31 +++++++++++++++++--------------
 src/core/hle/service/sm/sm.h     |  1 +
 3 files changed, 24 insertions(+), 18 deletions(-)

diff --git a/src/core/hle/service/service.cpp b/src/core/hle/service/service.cpp
index 6a64c6005..5ab41c0c4 100644
--- a/src/core/hle/service/service.cpp
+++ b/src/core/hle/service/service.cpp
@@ -119,12 +119,14 @@ void ServiceFrameworkBase::InstallAsService(SM::ServiceManager& service_manager)
 Kernel::KClientPort& ServiceFrameworkBase::CreatePort() {
     const auto guard = LockService();
 
-    ASSERT(!service_registered);
+    if (named_port == nullptr) {
+        ASSERT(!service_registered);
 
-    named_port = Kernel::KPort::Create(kernel);
-    named_port->Initialize(max_sessions, false, service_name);
+        named_port = Kernel::KPort::Create(kernel);
+        named_port->Initialize(max_sessions, false, service_name);
 
-    service_registered = true;
+        service_registered = true;
+    }
 
     return named_port->GetClientPort();
 }
diff --git a/src/core/hle/service/sm/sm.cpp b/src/core/hle/service/sm/sm.cpp
index c1f535d71..84720094f 100644
--- a/src/core/hle/service/sm/sm.cpp
+++ b/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);
@@ -57,7 +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;
 }
@@ -72,23 +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);
-    if (it == registered_services.end()) {
+    auto it = service_ports.find(name);
+    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);
-
-    port->Initialize(ServerSessionCountMax, false, name);
-    auto handler = it->second;
-
-    return port;
+    return it->second;
 }
 
 /**
@@ -153,10 +160,6 @@ ResultVal<Kernel::KClientSession*> SM::GetServiceImpl(Kernel::HLERequestContext&
         return port_result.Code();
     }
     auto& port = port_result.Unwrap();
-    SCOPE_EXIT({
-        port->GetClientPort().Close();
-        port->GetServerPort().Close();
-    });
 
     // Create a new session.
     Kernel::KClientSession* session{};
diff --git a/src/core/hle/service/sm/sm.h b/src/core/hle/service/sm/sm.h
index cfe370652..02a5dde9e 100644
--- a/src/core/hle/service/sm/sm.h
+++ b/src/core/hle/service/sm/sm.h
@@ -79,6 +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;
-- 
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