`:quit` in the debugger should quit the whole program

(cherry picked from commit 2a8fe9a93837733e9dd9ed5c078734a35b203e14)
Change-Id: I71dadfef6b24d9272b206e9e2c408040559d8a1c

2 files changed, 26 insertions, 0 deletions

diff --git a/src/libutil/exit.cc b/src/libutil/exit.cc
new file mode 100644
index 000000000..73cd8b04e
--- /dev/null
+++ b/src/libutil/exit.cc
@@ -0,0 +1,7 @@
+#include "exit.hh"
+
+namespace nix {
+
+Exit::~Exit() {}
+
+}
diff --git a/src/libutil/exit.hh b/src/libutil/exit.hh
new file mode 100644
index 000000000..55f33e62f
--- /dev/null
+++ b/src/libutil/exit.hh
@@ -0,0 +1,19 @@
+#pragma once
+
+#include <exception>
+
+namespace nix {
+
+/**
+ * Exit the program with a given exit code.
+ */
+class Exit : public std::exception
+{
+public:
+    int status;
+    Exit() : status(0) { }
+    explicit Exit(int status) : status(status) { }
+    virtual ~Exit();
+};
+
+}