exception stack trace

pvDataApp/test/testBaseException.cpp

@@ -13,6 +13,29 @@
 
 using namespace epics::pvData;
 
+struct Unroller
+{
+    template <int N>
+    void unroll(double d) {
+        unroll<N-1>(d);
+    }
+};
+
+template<>
+void Unroller::unroll<0>(double d) {
+    THROW_BASE_EXCEPTION("the root cause");
+}
+
+void internalTestBaseException(int unused = 0)
+{
+    try {
+        // NOTE: 5, 4, 3, 2, 1 calls will be optimized and not shown
+        Unroller().unroll<5>(42.0);
+    } catch (BaseException *be3) {
+        THROW_BASE_EXCEPTION_CAUSE("exception 1", be3);
+    }
+}
+
 void testBaseException() {
     printf("testBaseException... ");
 
@@ -26,13 +49,9 @@ void testBaseException() {
 
     try {
         try {
-            try {
-                THROW_BASE_EXCEPTION("the root cause");
-            } catch (BaseException *be3) {
-                THROW_BASE_EXCEPTION_CAUSE("exception 1", be3);
-            }
+            internalTestBaseException();
         } catch (BaseException *be2) {
-            THROW_BASE_EXCEPTION_CAUSE("excepton 2", be2);
+            THROW_BASE_EXCEPTION_CAUSE("exception 2", be2);
         }
     } catch (BaseException *be) {
         std::string str;