diff -r 90c86cc933f3 -r 630417cc8add util/style/verifiers.py
--- a/util/style/verifiers.py	Tue Mar 29 10:16:23 2016 +0100
+++ b/util/style/verifiers.py	Tue Mar 29 10:16:25 2016 +0100
@@ -348,6 +348,20 @@
     def fix_line(self, line):
         pass
 
+class ControlCharacters(LineVerifier):
+    languages = set(('C', 'C++', 'swig', 'python', 'asm', 'isa', 'scons'))
+    test_name = 'control character'
+    opt_name = 'ascii'
+
+    valid = ('\n', '\t')
+    invalid = "".join([chr(i) for i in range(0, 0x20) if chr(i) not in valid])
+
+    def check_line(self, line):
+        return self.fix_line(line) == line
+
+    def fix_line(self, line):
+        return line.translate(None, ControlCharacters.invalid)
+
 class BoolCompare(LineVerifier):
     languages = set(('C', 'C++', 'python'))
     test_name = 'boolean comparison'