frontends: datatypes: add new xref function (#2099)

Signed-off-by: David Korczynski <david@adalogics.com>

src/fuzz_introspector/frontends/datatypes.py

@@ -186,6 +186,15 @@ def get_cross_references(self, src_func: Any) -> list[Any]:
 
         return xrefs
 
+    def get_cross_references_by_name(self, function_name) -> list[Any]:
+        """Get cross reference functions by a target function name."""
+        xrefs = []
+        for func in self.all_functions:
+            for callsite in func.base_callsites:
+                if callsite[0] == function_name:
+                    xrefs.append(func)
+        return xrefs
+
     def find_function_by_name(self, target_function_name, only_exact_match):
         """Helper function to find the matching function."""
         for function in self.all_functions: