diff --git a/src/Hooks.cpp b/src/Hooks.cpp
index 0879d614e..dc74d586f 100644
--- a/src/Hooks.cpp
+++ b/src/Hooks.cpp
@@ -49,6 +49,22 @@ void Hooks::initialize ()
 ////////////////////////////////////////////////////////////////////////////////
 void Hooks::onLaunch ()
 {
+  context.timer_hooks.start ();
+
+  // TODO Call all launch hook scripts.
+  // TODO Non-zero exit status terminates launch.
+
+  context.timer_hooks.stop ();
+}
+
+////////////////////////////////////////////////////////////////////////////////
+void Hooks::onExit ()
+{
+  context.timer_hooks.start ();
+
+  // TODO Call all exit hook scripts.
+
+  context.timer_hooks.stop ();
 }
 
 // TODO Time the hook runs.
diff --git a/src/Hooks.h b/src/Hooks.h
index 0af94d765..28d5b6d65 100644
--- a/src/Hooks.h
+++ b/src/Hooks.h
@@ -38,6 +38,7 @@ public:
   void initialize ();
 
   void onLaunch ();
+  void onExit ();
 
 private:
 };