Shorten thread names exceeding the 15-char Linux pthread_setname_np limit

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

@@ -1160,7 +1160,7 @@ namespace CorUnix
             reinterpret_cast<CPalSynchronizationManager*>(pArg);
         CPalThread * pthrWorker = InternalGetCurrentThread();
 
-        SetThreadDescription(PAL_GetCurrentThread(), W(".NET SynchManager"));
+        SetThreadDescription(PAL_GetCurrentThread(), W(".NET Sync Mgr"));
 
         while (!fWorkerIsDone)
         {

src/coreclr/vm/eepolicy.cpp

@@ -715,7 +715,7 @@ void DECLSPEC_NORETURN EEPolicy::HandleFatalStackOverflow(EXCEPTION_POINTERS *pE
 
         DisplayStackOverflowException();
 
-        HandleHolder stackDumpThreadHandle = Thread::CreateUtilityThread(Thread::StackSize_Small, LogStackOverflowStackTraceThread, GetThreadNULLOk(), W(".NET Stack overflow trace logger"));
+        HandleHolder stackDumpThreadHandle = Thread::CreateUtilityThread(Thread::StackSize_Small, LogStackOverflowStackTraceThread, GetThreadNULLOk(), W(".NET SO Tracer"));
         if (stackDumpThreadHandle != INVALID_HANDLE_VALUE)
         {
             // Wait for the stack trace logging completion

src/coreclr/vm/excep.cpp

@@ -3430,7 +3430,7 @@ CreateCrashDumpIfEnabled(bool stackoverflow)
     {
         if (stackoverflow)
         {
-            HandleHolder createDumpThreadHandle = Thread::CreateUtilityThread(Thread::StackSize_Small, (LPTHREAD_START_ROUTINE)LaunchCreateDump, (void*)createDumpCommandLine, W(".NET Stack overflow create dump"));
+            HandleHolder createDumpThreadHandle = Thread::CreateUtilityThread(Thread::StackSize_Small, (LPTHREAD_START_ROUTINE)LaunchCreateDump, (void*)createDumpCommandLine, W(".NET SO Dumper"));
             if (createDumpThreadHandle != INVALID_HANDLE_VALUE)
             {
                 // Wait for the dump to be generated

src/coreclr/vm/tieredcompilation.cpp

@@ -398,7 +398,7 @@ void TieredCompilationManager::CreateBackgroundWorker()
     #endif
         newThread->SetBackground(true);
 
-        if (!newThread->CreateNewThread(0, BackgroundWorkerBootstrapper0, newThread, W(".NET Tiered Compilation Worker")))
+        if (!newThread->CreateNewThread(0, BackgroundWorkerBootstrapper0, newThread, W(".NET Tiered JIT")))
         {
             newThread->DecExternalCount(false);
             ThrowOutOfMemory();

src/libraries/System.Private.CoreLib/src/System/Threading/PortableThreadPool.IO.Windows.cs

@@ -227,7 +227,7 @@ public IOCompletionPoller(nint port)
 
                 _thread.IsThreadPoolThread = true;
                 _thread.IsBackground = true;
-                _thread.Name = ".NET ThreadPool IO";
+                _thread.Name = ".NET TP I/O";
 
                 // Thread pool threads must start in the default execution context without transferring the context, so
                 // using UnsafeStart() instead of Start()

src/libraries/System.Private.CoreLib/src/System/Threading/Tasks/ThreadPoolTaskScheduler.cs

@@ -49,7 +49,7 @@ protected internal override void QueueTask(Task task)
                 new Thread(s_longRunningThreadWork)
                 {
                     IsBackground = true,
-                    Name = ".NET Long Running Task"
+                    Name = ".NET Long Task"
                 }.UnsafeStart(task);
             }
             else

src/mono/browser/runtime/pthreads/worker-thread.ts

@@ -152,7 +152,7 @@ export function mono_wasm_pthread_on_pthread_attached (pthread_id: PThreadPtr, t
         // FIXME: this is a hack to get constant length thread names
         monoThreadInfo.threadName = name;
         monoThreadInfo.isTimer = name == ".NET Timer";
-        monoThreadInfo.isLongRunning = name == ".NET Long Running Task";
+        monoThreadInfo.isLongRunning = name == ".NET Long Task";
         monoThreadInfo.isThreadPoolGate = name == ".NET TP Gate";
         update_thread_info();
         currentWorkerThreadEvents.dispatchEvent(makeWorkerThreadEvent(dotnetPthreadAttached, pthread_self));