Integrate LLVM's libfuzzer engine with JerryScript (#2898)

JerryScript-DCO-1.0-Signed-off-by: Renata Hodovan reni@inf.u-szeged.hu

jerry-main/CMakeLists.txt

@@ -54,6 +54,12 @@ macro(jerry_create_executable JERRY_NAME)
   install(TARGETS ${JERRY_NAME} DESTINATION bin)
 endmacro()
 
+# Jerry with libfuzzer support
+if(JERRY_LIBFUZZER)
+  jerry_create_executable("jerry-libfuzzer" "libfuzzer.c")
+  target_link_libraries("jerry-libfuzzer" jerry-port-default)
+endif()
+
 # Jerry standalones
 if(JERRY_CMDLINE)
   jerry_create_executable("jerry" "main-unix.c" "cli.c")

jerry-main/libfuzzer.c

@@ -0,0 +1,39 @@
+/* Copyright JS Foundation and other contributors, http://js.foundation
+ *
+ * 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.
+ */
+
+#include "jerryscript.h"
+
+
+int LLVMFuzzerTestOneInput (const uint8_t *data, size_t size)
+{
+  jerry_init (JERRY_INIT_EMPTY);
+
+  if (jerry_is_valid_utf8_string ((jerry_char_t *) data, (jerry_size_t) size))
+  {
+    jerry_value_t parse_value = jerry_parse (NULL, 0, (jerry_char_t *) data, size, JERRY_PARSE_NO_OPTS);
+
+    if (!jerry_value_is_error (parse_value))
+    {
+      jerry_value_t run_value = jerry_run (parse_value);
+      jerry_release_value (run_value);
+    }
+
+    jerry_release_value (parse_value);
+  }
+
+  jerry_cleanup ();
+
+  return 0;
+} /* LLVMFuzzerTestOneInput */