base: do not allow unnamed threads

fix #901

base/include/base/thread.h

@@ -403,7 +403,7 @@ namespace Genode {
 			 *
 			 * \param name  thread name (for debugging)
 			 */
-			explicit Thread(const char *name = "<noname>")
+			explicit Thread(const char *name)
 			: Thread_base(name, STACK_SIZE) { }
 	};
 }

base/src/test/affinity/main.cc

@@ -76,7 +76,7 @@ int main(int argc, char **argv)
 	/* construct the thread objects */
 	for (unsigned i = 0; i < cpus.total(); i++)
 		threads[i] = new (env()->heap())
-		             Spinning_thread(cpus.location_of_index(i), "thread");
+		             Spinning_thread(cpus.location_of_index(i), "spinning_thread");
 
 	/* wait until all threads are up and running */
 	for (unsigned i = 0; i < cpus.total(); i++)

base/src/test/lifetime/main.cc

@@ -156,7 +156,7 @@ struct Destruct_thread : Genode::Thread<4096>
 		PLOG("thread: destruction completed, job done");
 	}
 
-	Destruct_thread(Object *obj) : obj(obj) { }
+	Destruct_thread(Object *obj) : Thread("object_destructor"), obj(obj) { }
 };
 
 

base/src/test/rm_nested/main.cc

@@ -50,6 +50,7 @@ class Local_fault_handler : public Thread<4096>
 
 		Local_fault_handler(Rm_session *rm_session, Signal_receiver *receiver)
 		:
+			Thread("local_fault_handler"),
 			_rm_session(rm_session), _receiver(receiver)
 		{ }