test: Convert tick-* probes to BEGIN probes for default-action test

The tick-* mechanism can be fickle on some platforms.  Do not use
it for this test, which is intended simply to check default actions.

Signed-off-by: Eugene Loh <eugene.loh@oracle.com>
Reviewed-by: Kris Van Hees <kris.van.hees@oracle.com>

test/unittest/actions/default/tst.default.d

@@ -1,6 +1,6 @@
 /*
  * Oracle Linux DTrace.
- * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2020, 2023, Oracle and/or its affiliates. All rights reserved.
  * Licensed under the Universal Permissive License v 1.0 as shown at
  * http://oss.oracle.com/licenses/upl.
  */
@@ -15,30 +15,34 @@
  * SECTION: Actions and Subroutines/default
  */
 
-/* should not trace, but should update n */
+/* should not trace, but should set n=1 */
 BEGIN
 { n = 1; }
 
-/* should trace, "hello world" should appear */
-tick-14
-{ printf("hello world"); }
+/* should trace, "hello world 1" should appear */
+BEGIN
+{ printf("hello world %d", n); }
 
-/* should not trace, but should update n */
-tick-13
+/* should not trace, but should update n+=2 */
+BEGIN
 { n += 2; }
 
-/* should trace */
-tick-12
+/* should trace, and n should be 1+2=3 */
+BEGIN
+{ printf("%d", n); }
+
+/* should trace, but not report anything */
+BEGIN
 { }
 
-/* should not trace, but should update n */
-tick-11
+/* should not trace, but should update n+=4 */
+BEGIN
 { n += 4; }
 
 /* should trace, and n should be 1+2+4=7 */
-tick-10
+BEGIN
 { trace(n); }
 
 /* should trace */
-tick-10
+BEGIN
 { exit(0) }

test/unittest/actions/default/tst.default.r

@@ -1,8 +1,9 @@
                    FUNCTION:NAME
-                        :tick-14 hello world
-                        :tick-12 
-                        :tick-10           7
-                        :tick-10 
+                          :BEGIN hello world 1
+                          :BEGIN 3
+                          :BEGIN 
+                          :BEGIN           7
+                          :BEGIN 
 
 -- @@stderr --
-dtrace: script 'test/unittest/actions/default/tst.default.d' matched 7 probes
+dtrace: script 'test/unittest/actions/default/tst.default.d' matched 8 probes