WIP add test case for complex struct

Author: hannes-steffenhagen-diffblue

regression/goto-instrument/replace-function-body-complex-struct/main.c

@@ -0,0 +1,45 @@
+#include <assert.h>
+#include <stdlib.h>
+
+struct ComplexStruct
+{
+  struct
+  {
+    int some_variable;
+    const int some_constant;
+  } struct_contents;
+  union {
+    int some_integer;
+    double some_double;
+  } union_contents;
+  struct ComplexStruct *pointer_contents;
+};
+
+void havoc_complex_struct(struct ComplexStruct *p);
+
+int main(void)
+{
+  struct ComplexStruct child_struct = {{11, 21}, {.some_integer = 31}, NULL};
+  struct ComplexStruct main_struct = {
+    {10, 20}, {.some_double = 13.0}, &child_struct};
+  assert(main_struct.pointer_contents->struct_contents.some_variable == 11);
+  assert(main_struct.struct_contents.some_variable == 10);
+  assert(main_struct.struct_contents.some_constant == 20);
+  assert(
+    main_struct.union_contents.some_double < 14.0 &&
+    main_struct.union_contents.some_double > 12.0);
+
+  havoc_complex_struct(&main_struct);
+
+  // everything (except constants) in the main struct was havocced
+  assert(main_struct.pointer_contents->struct_contents.some_variable == 11);
+  assert(main_struct.struct_contents.some_variable == 10);
+  assert(main_struct.struct_contents.some_constant == 20);
+  assert(
+    main_struct.union_contents.some_double < 14.0 &&
+    main_struct.union_contents.some_double > 12.0);
+  // the child struct was NOT havocced because we can't follow pointers
+  assert(child_struct.struct_contents.some_variable == 11);
+  assert(child_struct.union_contents.some_integer == 31);
+  assert(child_struct.pointer_contents == NULL);
+}

regression/goto-instrument/replace-function-body-complex-struct/test.desc

@@ -0,0 +1,17 @@
+CORE
+main.c
+--replace-function-body 'havoc_complex_struct' --replace-function-body-options 'havoc,params:.*'
+^SIGNAL=0$
+^EXIT=10$
+\[main.assertion.1\] assertion main_struct.pointer_contents->struct_contents.some_variable == 11: SUCCESS
+\[main.assertion.2\] assertion main_struct.struct_contents.some_variable == 10: SUCCESS
+\[main.assertion.3\] assertion main_struct.struct_contents.some_constant == 20: SUCCESS
+\[main.assertion.4\] assertion main_struct.union_contents.some_double < 14.0 && main_struct.union_contents.some_double > 12.0: SUCCESS
+\[main.assertion.5\] assertion main_struct.pointer_contents->struct_contents.some_variable == 11: FAILURE
+\[main.assertion.6\] assertion main_struct.struct_contents.some_variable == 10: FAILURE
+\[main.assertion.7\] assertion main_struct.struct_contents.some_constant == 20: SUCCESS
+\[main.assertion.8\] assertion main_struct.union_contents.some_double < 14.0 && main_struct.union_contents.some_double > 12.0: FAILURE
+\[main.assertion.9\] assertion child_struct.struct_contents.some_variable == 11: SUCCESS
+\[main.assertion.10\] assertion child_struct.union_contents.some_integer == 31: SUCCESS
+\[main.assertion.11\] assertion child_struct.pointer_contents == NULL: SUCCESS
+^VERIFICATION FAILED$