Index: CMakeLists.txt
===================================================================
--- CMakeLists.txt
+++ CMakeLists.txt
@@ -432,4 +432,5 @@
                   "available!")
 else()
   add_subdirectory(test)
+  add_subdirectory(fuzz)
 endif()
Index: fuzz/CMakeLists.txt
===================================================================
--- /dev/null
+++ fuzz/CMakeLists.txt
@@ -0,0 +1,13 @@
+# See http://llvm.org/docs/LibFuzzer.html
+if( LLVM_USE_SANITIZE_COVERAGE )
+  set(LLVM_LINK_COMPONENTS support)
+
+  add_executable(cxa_demangle_fuzzer
+    cxa_demangle_fuzzer.cpp
+    ../src/cxa_demangle.cpp
+    )
+
+  target_link_libraries(cxa_demangle_fuzzer
+    LLVMFuzzer
+    )
+endif()
Index: fuzz/cxa_demangle_fuzzer.cpp
===================================================================
--- /dev/null
+++ fuzz/cxa_demangle_fuzzer.cpp
@@ -0,0 +1,15 @@
+#include <stdint.h>
+#include <stddef.h>
+#include <string.h>
+#include <stdlib.h>
+extern "C" char *
+__cxa_demangle(const char *mangled_name, char *buf, size_t *n, int *status);
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
+  char *str = new char[size+1];
+  memcpy(str, data, size);
+  str[size] = 0;
+  free(__cxa_demangle(str, 0, 0, 0));
+  delete [] str;
+  return 0;
+}