[libfuzzer] Add fuzzer for third_party/hunspell with dictionary.

third_party/hunspell/fuzz/hunspell_fuzzer.cc

Index: third_party/hunspell/fuzz/hunspell_fuzzer.cc
diff --git a/third_party/hunspell/fuzz/hunspell_fuzzer.cc b/third_party/hunspell/fuzz/hunspell_fuzzer.cc
new file mode 100644
index 0000000000000000000000000000000000000000..f91b061fda234fcc227ff0e5d6f21ec2039150c3
--- /dev/null
+++ b/third_party/hunspell/fuzz/hunspell_fuzzer.cc
@@ -0,0 +1,33 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include <stddef.h>
+#include <stdint.h>
+#include <string>
+
+#include "third_party/hunspell/src/hunspell/hunspell.hxx"
+
+#include "third_party/hunspell/fuzz/hunspell_fuzzer_dictionary.h"
+
+static Hunspell* CreateHunspell() {
+  return new Hunspell(
+      reinterpret_cast<const unsigned char*>(kHunspellDictionary),
+      sizeof(kHunspellDictionary));

[please use gerrit instead, 2016/06/02 16:03:50]

When used with expressions (not types), the parens are not necessary:

sizeof kHunspellDicitonary

See http://en.cppreference.com/w/cpp/language/sizeof

[mmoroz, 2016/06/03 13:07:37]

Yeah, but it is absolutely legit since "expression" ~~ "(expression)", § 5.1.1.6
at ISO/IEC 14882:2011.

There is a plenty of ways to make code less readable, good thing that usually we
are not required to follow them :)

+}
+
+// Entry point for LibFuzzer.
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  if (!size)
+    return 0;
+  
+  static Hunspell* hunspell = CreateHunspell();
+  std::string data_string(reinterpret_cast<const char*>(data), size);
+  hunspell->spell(data_string.c_str());
+
+  char** suggestions = nullptr;
+  int suggetion_length = hunspell->suggest(&suggestions, data_string.c_str());
+  hunspell->free_list(&suggestions, suggetion_length);
+
+  return 0;
+}