Shamelessly copy Josiah

source/lib/json/tests/thirdparty/Fuzzer/test/InitializeTest.cpp

@@ -0,0 +1,28 @@
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+
+// Make sure LLVMFuzzerInitialize is called.
+#include <assert.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+static char *argv0;
+
+extern "C" int LLVMFuzzerInitialize(int *argc, char ***argv) {
+  assert(*argc > 0);
+  argv0 = **argv;
+  fprintf(stderr, "LLVMFuzzerInitialize: %s\n", argv0);
+  return 0;
+}
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
+  if (Size == strlen(argv0) &&
+      !strncmp(reinterpret_cast<const char *>(Data), argv0, Size)) {
+    fprintf(stderr, "BINGO %s\n", argv0);
+    exit(1);
+  }
+  return 0;
+}