Set names to runtime internal threads

src/coreclr/debug/ee/rcthread.cpp

@@ -1311,6 +1311,11 @@ void DebuggerRCThread::TemporaryHelperThreadMainLoop()
 
     DebuggerRCThread* t = (DebuggerRCThread*)g_pRCThread;
 
+    if (FAILED(SetThreadName(t->m_thread, W(".NET Debugger"))))
+    {
+        LOG((LF_CORDB, LL_INFO10000, "DebuggerRCThread name set failed\n"));
+    }
+
     t->ThreadProc(); // this thread is local, go and become the helper
 
     return 0;
@@ -1366,7 +1371,6 @@ HRESULT DebuggerRCThread::Start(void)
         {
             LOG((LF_CORDB, LL_EVERYTHING, "DebuggerRCThread failed, err=%d\n", GetLastError()));
             hr = HRESULT_FROM_GetLastError();
-
         }
         else
         {

src/coreclr/debug/shared/dbgtransportsession.cpp

@@ -1227,6 +1227,8 @@ void DbgTransportSession::InitSessionState()
 // instance method version defined below for convenience in the implementation.
 DWORD WINAPI DbgTransportSession::TransportWorkerStatic(LPVOID pvContext)
 {
+    SetThreadName(GetCurrentThread(), W(".NET DebugPipe"));
+
     ((DbgTransportSession*)pvContext)->TransportWorker();
 
     // Nobody looks at this result, the choice of 0 is arbitrary.

src/coreclr/pal/src/synchmgr/synchmanager.cpp

@@ -1707,6 +1707,10 @@ namespace CorUnix
             reinterpret_cast<CPalSynchronizationManager*>(pArg);
         CPalThread * pthrWorker = InternalGetCurrentThread();
 
+        InternalSetThreadDescription(pthrWorker,
+                                     PAL_GetCurrentThread(),
+                                     W(".NET SynchManager"));
+
         while (!fWorkerIsDone)
         {
             LONG lProcessCount;

src/coreclr/vm/eventing/eventpipe/ep-rt-coreclr.h

@@ -2047,6 +2047,14 @@ ep_rt_thread_create (
 	return result;
 }
 
+static
+inline
+void
+ep_rt_set_server_name()
+{
+	::SetThreadName(GetCurrentThread(), W(".NET EventPipe"));
+}
+
 static
 inline
 void

src/libraries/System.Private.CoreLib/src/System/Threading/PortableThreadPool.GateThread.cs

@@ -239,7 +239,7 @@ private static void CreateGateThread(PortableThreadPool threadPoolInstance)
                     {
                         IsThreadPoolThread = true,
                         IsBackground = true,
-                        Name = ".NET ThreadPool Gate"
+                        Name = ".NET TP Gate"
                     };
                     gateThread.UnsafeStart();
                 }

src/libraries/System.Private.CoreLib/src/System/Threading/PortableThreadPool.WaitThread.cs

@@ -187,7 +187,7 @@ public WaitThread()
                 {
                     IsThreadPoolThread = true,
                     IsBackground = true,
-                    Name = ".NET ThreadPool Wait"
+                    Name = ".NET TP Wait"
                 };
                 waitThread.UnsafeStart();
             }

src/libraries/System.Private.CoreLib/src/System/Threading/ThreadPoolWorkQueue.cs

@@ -1355,7 +1355,7 @@ internal static void PerformWaitOrTimerCallback(_ThreadPoolWaitOrTimerCallback h
 
     public static partial class ThreadPool
     {
-        internal const string WorkerThreadName = ".NET ThreadPool Worker";
+        internal const string WorkerThreadName = ".NET TP Worker";
 
         internal static readonly ThreadPoolWorkQueue s_workQueue = new ThreadPoolWorkQueue();
 

src/mono/mono/eventpipe/ep-rt-mono.h

@@ -1359,6 +1359,14 @@ ep_rt_thread_create (
 	return false;
 }
 
+static
+inline
+void
+ep_rt_set_server_name()
+{
+	mono_native_thread_set_name(mono_native_thread_id_get(), ".NET EventPipe");
+}
+
 static
 inline
 void

src/native/eventpipe/ds-server.c

@@ -116,6 +116,8 @@ EP_RT_DEFINE_THREAD_FUNC (server_thread)
 {
 	EP_ASSERT (server_volatile_load_shutting_down_state () || ds_ipc_stream_factory_has_active_ports ());
 
+	ep_rt_set_server_name();
+
 	if (!ds_ipc_stream_factory_has_active_ports ()) {
 #ifndef DS_IPC_DISABLE_LISTEN_PORTS
 		DS_LOG_ERROR_0 ("Diagnostics IPC listener was undefined");
@@ -256,7 +258,7 @@ ds_server_shutdown (void)
 void
 ds_server_pause_for_diagnostics_monitor (void)
 {
-    _is_paused_for_startup = true;
+	_is_paused_for_startup = true;
 
 	if (ds_ipc_stream_factory_any_suspended_ports ()) {
 		EP_ASSERT (ep_rt_wait_event_is_valid (&_server_resume_runtime_startup_event));
@@ -278,7 +280,7 @@ ds_server_resume_runtime_startup (void)
 	ds_ipc_stream_factory_resume_current_port ();
 	if (!ds_ipc_stream_factory_any_suspended_ports () && ep_rt_wait_event_is_valid (&_server_resume_runtime_startup_event)) {
 		ep_rt_wait_event_set (&_server_resume_runtime_startup_event);
-        _is_paused_for_startup = false;
+		_is_paused_for_startup = false;
 	}
 }
 

src/native/eventpipe/ep-rt.h

@@ -566,6 +566,10 @@ ep_rt_thread_create (
 	EventPipeThreadType thread_type,
 	void *id);
 
+static
+void
+ep_rt_set_server_name (void);
+
 static
 void
 ep_rt_thread_sleep (uint64_t ns);

src/native/libs/System.Native/pal_signal.c

@@ -313,6 +313,14 @@ static void* SignalHandlerLoop(void* arg)
     free(arg);
     assert(pipeFd >= 0);
 
+    char* threadName = ".NET SigHandler";
+#if defined(__linux__) || defined(__FreeBSD__)
+    pthread_setname_np(pthread_self(), threadName);
+#endif
+#if defined(__APPLE__)
+    pthread_setname_np(threadName);
+#endif
+
     // Continually read a signal code from the signal pipe and process it,
     // until the pipe is closed.
     while (true)