nova: use 'Native_cpu' component for thread initialization

Pass the thread type and exception base to core with a 'Native_cpu'
component instead of enhancing the 'Thread_state' class.

Fixes #2298

repos/gems/src/lib/cpu_sampler_platform-nova/native_cpu.cc

@@ -0,0 +1,86 @@
+/*
+ * \brief  NOVA-specific 'Native_cpu' setup
+ * \author Christian Prochaska
+ * \date   2016-05-13
+ */
+
+/*
+ * Copyright (C) 2016-2017 Genode Labs GmbH
+ *
+ * This file is part of the Genode OS framework, which is distributed
+ * under the terms of the GNU Affero General Public License version 3.
+ */
+
+
+/* Genode includes */
+#include <nova_native_cpu/client.h>
+
+/* Cpu_sampler includes */
+#include "cpu_session_component.h"
+#include "cpu_thread_component.h"
+
+
+namespace Cpu_sampler {
+	class Native_cpu_component;
+}
+
+
+using namespace Genode;
+
+
+class Cpu_sampler::Native_cpu_component : public Rpc_object<Nova_native_cpu,
+                                                          Native_cpu_component>
+{
+	private:
+
+		Cpu_session_component &_cpu_session_component;
+		Nova_native_cpu_client _nova_native_cpu;
+
+	public:
+
+		Native_cpu_component(Cpu_session_component &cpu_session_component)
+		: _cpu_session_component(cpu_session_component),
+		  _nova_native_cpu(_cpu_session_component.parent_cpu_session().native_cpu())
+		{
+			_cpu_session_component.thread_ep().manage(this);
+		}
+
+		~Native_cpu_component()
+		{
+			_cpu_session_component.thread_ep().dissolve(this);
+		}
+
+		void thread_type(Thread_capability thread_cap,
+		                 Nova_native_cpu::Thread_type thread_type,
+		                 Nova_native_cpu::Exception_base exception_base) override
+		{
+			auto lambda = [&] (Cpu_sampler::Cpu_thread_component *cpu_thread) {
+				_nova_native_cpu.thread_type(cpu_thread->parent_thread(),
+				                             thread_type, exception_base);
+			};
+
+			_cpu_session_component.thread_ep().apply(thread_cap, lambda);
+		}
+};
+
+
+Capability<Cpu_session::Native_cpu>
+Cpu_sampler::Cpu_session_component::_setup_native_cpu()
+{
+	Native_cpu_component *native_cpu_component =
+		new (_md_alloc) Native_cpu_component(*this);
+
+	return native_cpu_component->cap();
+}
+
+
+void Cpu_sampler::Cpu_session_component::_cleanup_native_cpu()
+{
+	Native_cpu_component *native_cpu_component = nullptr;
+	_thread_ep.apply(_native_cpu_cap,
+	                 [&] (Native_cpu_component *c) { native_cpu_component = c; });
+
+	if (!native_cpu_component) return;
+
+	destroy(_md_alloc, native_cpu_component);
+}

repos/gems/src/lib/cpu_sampler_platform-nova/target.mk

@@ -0,0 +1,2 @@
+TARGET = cpu_sampler_platform-nova
+LIBS   = cpu_sampler_platform-nova