WIP add test for union with const members

Author: hannes-steffenhagen-diffblue

regression/goto-instrument/replace-function-body-union-with-const-member/main.c

@@ -0,0 +1,25 @@
+#include <assert.h>
+
+union WithConstMember {
+  int non_const;
+  const int is_const;
+};
+
+union WithConstMember globalUnion;
+void havoc_union(union WithConstMember *u);
+
+int main(void)
+{
+  union WithConstMember paramUnion;
+  globalUnion.non_const = 10;
+  paramUnion.non_const = 20;
+  assert(globalUnion.non_const == 10);
+  assert(globalUnion.is_const == 10);
+  assert(paramUnion.non_const == 20);
+  assert(paramUnion.is_const == 20);
+  havoc_union(&paramUnion);
+  assert(globalUnion.non_const == 10);
+  assert(globalUnion.is_const == 10);
+  assert(paramUnion.non_const == 20);
+  assert(paramUnion.is_const == 20);
+}

regression/goto-instrument/replace-function-body-union-with-const-member/test.desc

@@ -0,0 +1,14 @@
+CORE
+main.c
+--replace-function-body 'havoc_union' --replace-function-body-options 'havoc,params:.*,globals:(?!__).*'
+^SIGNAL=0$
+^EXIT=10$
+^\[main.assertion.1\] assertion globalUnion.non_const == 10: SUCCESS$
+^\[main.assertion.2\] assertion globalUnion.is_const == 10: SUCCESS$
+^\[main.assertion.3\] assertion paramUnion.non_const == 20: SUCCESS$
+^\[main.assertion.4\] assertion paramUnion.is_const == 20: SUCCESS$
+^\[main.assertion.5\] assertion globalUnion.non_const == 10: FAILURE$
+^\[main.assertion.6\] assertion globalUnion.is_const == 10: FAILURE$
+^\[main.assertion.7\] assertion paramUnion.non_const == 20: FAILURE$
+^\[main.assertion.8\] assertion paramUnion.is_const == 20: FAILURE$
+^VERIFICATION FAILED$