fonttools: extend and clean-up (#9929)

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

projects/fonttools/fuzz_compile.py

@@ -47,7 +47,7 @@ def TestOneInput(data):
 
 def main():
   atheris.instrument_all()
-  atheris.Setup(sys.argv, TestOneInput, enable_python_coverage=True)
+  atheris.Setup(sys.argv, TestOneInput)
   atheris.Fuzz()
 
 

projects/fonttools/fuzz_ttfont.py

@@ -38,7 +38,7 @@ def TestOneInput(data):
 
 def main():
   atheris.instrument_all()
-  atheris.Setup(sys.argv, TestOneInput, enable_python_coverage=True)
+  atheris.Setup(sys.argv, TestOneInput)
   atheris.Fuzz()
 
 

projects/fonttools/fuzz_ttfont_save.py

@@ -0,0 +1,45 @@
+#!/usr/bin/python3
+# Copyright 2023 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import io
+import sys
+import atheris
+
+from fontTools import ttLib
+from fontTools.ttLib import TTFont
+import xml
+
+
+def TestOneInput(data):
+  randfile = "/tmp/random2.ttx"
+  with open(randfile, "wb") as f:
+    f.write(data)
+  try:
+    otf = TTFont(randfile)
+  except Exception:
+    return
+
+  # The idea to check here is that does not throw an issue when being loaded
+  # should be save-able.
+  otf.saveXML('/tmp/saved_font.xml')
+
+def main():
+  atheris.instrument_all()
+  atheris.Setup(sys.argv, TestOneInput)
+  atheris.Fuzz()
+
+
+if __name__ == "__main__":
+  main()

projects/fonttools/fuzz_woff2.py

@@ -39,7 +39,7 @@ def TestOneInput(data):
 
 def main():
   atheris.instrument_all()
-  atheris.Setup(sys.argv, TestOneInput, enable_python_coverage=True)
+  atheris.Setup(sys.argv, TestOneInput)
   atheris.Fuzz()