diff --git a/src/emu/CMakeLists.txt b/src/emu/CMakeLists.txt
index b18de1a..47bbb21 100644
--- a/src/emu/CMakeLists.txt
+++ b/src/emu/CMakeLists.txt
@@ -43,6 +43,7 @@ add_library(emu STATIC
   nanos6/create.c
   nanos6/event.c
   nanos6/pvt.c
+  nanos6/finish.c
 )
 
 add_executable(ovniemu ovniemu.c)
diff --git a/src/emu/emu.c b/src/emu/emu.c
index 4498b27..881febf 100644
--- a/src/emu/emu.c
+++ b/src/emu/emu.c
@@ -160,9 +160,15 @@ emu_step(struct emu *emu)
 int
 emu_finish(struct emu *emu)
 {
+	if (model_finish(&emu->model, emu) != 0) {
+		err("model_finish failed");
+		return -1;
+	}
+
 	if (recorder_finish(&emu->recorder) != 0) {
 		err("recorder_finish failed");
 		return -1;
 	}
+
 	return 0;
 }
diff --git a/src/emu/model.c b/src/emu/model.c
index d6af3dd..4bda566 100644
--- a/src/emu/model.c
+++ b/src/emu/model.c
@@ -105,3 +105,22 @@ model_event(struct model *model, struct emu *emu, int index)
 
 	return 0;
 }
+
+int
+model_finish(struct model *model, struct emu *emu)
+{
+	for (int i = 0; i < MAX_MODELS; i++) {
+		if (!model->enabled[i])
+			continue;
+
+		struct model_spec *spec = model->spec[i];
+		if (spec->finish == NULL)
+			continue;
+
+		if (spec->finish(emu) != 0) {
+			err("finish failed for model '%c'", (char) i);
+			return -1;
+		}
+	}
+	return 0;
+}
diff --git a/src/emu/model.h b/src/emu/model.h
index c5333d2..f2d821d 100644
--- a/src/emu/model.h
+++ b/src/emu/model.h
@@ -14,6 +14,7 @@ struct model_spec {
 	emu_hook_t *create;
 	emu_hook_t *connect;
 	emu_hook_t *event;
+	emu_hook_t *finish;
 };
 
 #define MAX_MODELS 256
@@ -31,5 +32,6 @@ int model_probe(struct model *model, struct emu *emu);
 int model_create(struct model *model, struct emu *emu);
 int model_connect(struct model *model, struct emu *emu);
 int model_event(struct model *model, struct emu *emu, int index);
+int model_finish(struct model *model, struct emu *emu);
 
 #endif /* MODEL_H */
diff --git a/src/emu/nanos6/finish.c b/src/emu/nanos6/finish.c
new file mode 100644
index 0000000..ce240df
--- /dev/null
+++ b/src/emu/nanos6/finish.c
@@ -0,0 +1,44 @@
+#include "nanos6_priv.h"
+
+static int
+end_lint(struct emu *emu)
+{
+	struct system *sys = &emu->system;
+
+	/* Ensure we run out of subsystem states */
+	for (struct thread *t = sys->threads; t; t = t->gnext) {
+		struct nanos6_thread *th = EXT(t, '6');
+		struct chan *ch = &th->ch[CH_SUBSYSTEM];
+		int stacked = ch->data.stack.n;
+		if (stacked > 0) {
+			struct value top;
+			if (chan_read(ch, &top) != 0) {
+				err("chan_read failed for subsystem");
+				return -1;
+			}
+
+			err("thread %d ended with %d stacked nanos6 subsystems, top=\"%s\"\n",
+					t->tid, stacked, ss_name(top.i));
+			return -1;
+		}
+	}
+
+	return 0;
+}
+
+int
+nanos6_finish(struct emu *emu)
+{
+	if (finish_pvt(emu) != 0) {
+		err("finish_pvt failed");
+		return -1;
+	}
+
+	/* When running in linter mode perform additional checks */
+	if (emu->args.linter_mode && end_lint(emu) != 0) {
+		err("end_lint failed");
+		return -1;
+	}
+
+	return 0;
+}
diff --git a/src/emu/nanos6/nanos6_priv.h b/src/emu/nanos6/nanos6_priv.h
index ddb39c2..7a410b0 100644
--- a/src/emu/nanos6/nanos6_priv.h
+++ b/src/emu/nanos6/nanos6_priv.h
@@ -98,7 +98,10 @@ int nanos6_probe(struct emu *emu);
 int nanos6_create(struct emu *emu);
 int nanos6_connect(struct emu *emu);
 int nanos6_event(struct emu *emu);
+int nanos6_finish(struct emu *emu);
 
 int init_pvt(struct emu *emu);
+int finish_pvt(struct emu *emu);
+const char *ss_name(int ss);
 
 #endif /* NANOS6_PRIV_H */
diff --git a/src/emu/nanos6/probe.c b/src/emu/nanos6/probe.c
index 72befa6..0deb9a6 100644
--- a/src/emu/nanos6/probe.c
+++ b/src/emu/nanos6/probe.c
@@ -7,6 +7,7 @@ struct model_spec model_nanos6 = {
 	.connect = nanos6_connect,
 	.event   = nanos6_event,
 	.probe   = nanos6_probe,
+	.finish  = nanos6_finish,
 };
 
 int
diff --git a/src/emu/nanos6/pvt.c b/src/emu/nanos6/pvt.c
index 94efe83..8f7b429 100644
--- a/src/emu/nanos6/pvt.c
+++ b/src/emu/nanos6/pvt.c
@@ -1,6 +1,12 @@
 #include "nanos6_priv.h"
 
 /* TODO: Assign types on runtime and generate configs */
+
+static const char *pvt_name[CT_MAX] = {
+	[CT_TH]  = "thread",
+	[CT_CPU] = "cpu",
+};
+
 static const int pvt_type[] = {
 	[CH_TASKID]    = 35,
 	[CH_TYPE]      = 36,
@@ -240,3 +246,48 @@ init_pvt(struct emu *emu)
 
 	return 0;
 }
+
+int
+finish_pvt(struct emu *emu)
+{
+	struct system *sys = &emu->system;
+
+	/* Emit task types for all channel types and processes */
+	for (enum chan_type ct = 0; ct < CHAN_MAXTYPE; ct++) {
+		struct pvt *pvt = recorder_find_pvt(&emu->recorder, pvt_name[ct]);
+		if (pvt == NULL) {
+			err("cannot find pvt with name '%s'", pvt_name[ct]);
+			return -1;
+		}
+		struct pcf *pcf = pvt_get_pcf(pvt);
+		long typeid = pvt_type[CH_TYPE];
+		struct pcf_type *pcftype = pcf_find_type(pcf, typeid);
+
+		for (struct proc *p = sys->procs; p; p = p->gnext) {
+			struct nanos6_proc *nanos6proc = EXT(p, '6');
+			struct task_info *info = &nanos6proc->task_info;
+			if (task_create_pcf_types(pcftype, info->types) != 0) {
+				err("task_create_pcf_types failed");
+				return -1;
+			}
+		}
+	}
+
+	return 0;
+}
+
+const char *
+ss_name(int ss)
+{
+	static const char *unknown = "(unknown)";
+	const char *name = unknown;
+	const struct pcf_value_label *pv;
+	for (pv = &nanos6_ss_values[0]; pv->label; pv++) {
+		if (pv->value == ss) {
+			name = pv->label;
+			break;
+		}
+	}
+
+	return name;
+}
diff --git a/src/emu/task.c b/src/emu/task.c
index df438b2..4ce6a27 100644
--- a/src/emu/task.c
+++ b/src/emu/task.c
@@ -5,6 +5,7 @@
 
 #include "uthash.h"
 #include "utlist.h"
+#include "pcf.h"
 
 struct task *
 task_find(struct task *tasks, uint32_t task_id)
@@ -281,24 +282,31 @@ task_type_create(struct task_info *info, uint32_t type_id, const char *label)
 	return 0;
 }
 
-//void
-//task_create_pcf_types(struct pcf_type *pcftype, struct task_type *types)
-//{
-//	/* Emit types for all task types */
-//	for (struct task_type *tt = types; tt != NULL; tt = tt->hh.next) {
-//		struct pcf_value *pcfvalue = pcf_find_value(pcftype, tt->gid);
-//		if (pcfvalue != NULL) {
-//			/* Ensure the label is the same, so we know that
-//			 * no collision occurred */
-//			if (strcmp(pcfvalue->label, tt->label) != 0)
-//				die("collision occurred in task type labels");
-//			else
-//				continue;
-//		}
-//
-//		pcf_add_value(pcftype, tt->gid, tt->label);
-//	}
-//}
+int
+task_create_pcf_types(struct pcf_type *pcftype, struct task_type *types)
+{
+	int ret = 0;
+
+	/* Emit types for all task types */
+	for (struct task_type *tt = types; tt != NULL; tt = tt->hh.next) {
+		struct pcf_value *pcfvalue = pcf_find_value(pcftype, tt->gid);
+		if (pcfvalue != NULL) {
+			/* Ensure the label is the same, so we know that
+			 * no collision occurred */
+			if (strcmp(pcfvalue->label, tt->label) != 0) {
+				err("collision occurred in task type labels: %s and %s",
+						pcfvalue->label, tt->label);
+				ret = -1;
+			} else {
+				continue;
+			}
+		}
+
+		pcf_add_value(pcftype, tt->gid, tt->label);
+	}
+
+	return ret;
+}
 
 struct task *
 task_get_running(struct task_stack *stack)
diff --git a/src/emu/task.h b/src/emu/task.h
index 2047240..e35efd2 100644
--- a/src/emu/task.h
+++ b/src/emu/task.h
@@ -64,7 +64,7 @@ int task_end(struct task_stack *stack, struct task *task);
 struct task_type *task_type_find(struct task_type *types, uint32_t type_id);
 int task_type_create(struct task_info *info, uint32_t type_id, const char *label);
 
-//void task_create_pcf_types(struct pcf_type *pcftype, struct task_type *types);
+int task_create_pcf_types(struct pcf_type *pcftype, struct task_type *types);
 struct task *task_get_running(struct task_stack *stack);
 
 #endif /* TASK_H */
diff --git a/test/emu/nanos6/CMakeLists.txt b/test/emu/nanos6/CMakeLists.txt
index f0e056c..5a6f819 100644
--- a/test/emu/nanos6/CMakeLists.txt
+++ b/test/emu/nanos6/CMakeLists.txt
@@ -7,4 +7,4 @@ ovni_test(nested-tasks-bad.c SHOULD_FAIL
 ovni_test(task-types.c MP)
 ovni_test(blocking.c MP)
 ovni_test(ss-mismatch.c SHOULD_FAIL
-  REGEX "thread [0-9]\\+ ended with 1 extra stacked nanos6 subsystems, top=\"Worker: Looking for work\"")
+  REGEX "thread [0-9]\\+ ended with 1 stacked nanos6 subsystems, top=\"Worker: Looking for work\"")