[fuzz] Move from fuzz/ to tests/fuzz/

tests/fuzz/regression_driver.c

@@ -0,0 +1,69 @@
+/**
+ * Copyright (c) 2016-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+
+#include "fuzz.h"
+#include "fuzz_helpers.h"
+#include "util.h"
+#include <stddef.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+int main(int argc, char const **argv) {
+  size_t const kMaxFileSize = (size_t)1 << 20;
+  int const kFollowLinks = 1;
+  char *fileNamesBuf = NULL;
+  char const **files = argv + 1;
+  unsigned numFiles = argc - 1;
+  uint8_t *buffer = NULL;
+  size_t bufferSize = 0;
+  unsigned i;
+  int ret;
+
+#ifdef UTIL_HAS_CREATEFILELIST
+  files = UTIL_createFileList(files, numFiles, &fileNamesBuf, &numFiles,
+                              kFollowLinks);
+  FUZZ_ASSERT(files);
+#endif
+
+  for (i = 0; i < numFiles; ++i) {
+    char const *fileName = files[i];
+    size_t const fileSize = UTIL_getFileSize(fileName);
+    size_t readSize;
+    FILE *file;
+
+    /* Check that it is a regular file, and that the fileSize is valid */
+    FUZZ_ASSERT_MSG(UTIL_isRegFile(fileName), fileName);
+    FUZZ_ASSERT_MSG(fileSize <= kMaxFileSize, fileName);
+    /* Ensure we have a large enough buffer allocated */
+    if (fileSize > bufferSize) {
+      free(buffer);
+      buffer = (uint8_t *)malloc(fileSize);
+      FUZZ_ASSERT_MSG(buffer, fileName);
+      bufferSize = fileSize;
+    }
+    /* Open the file */
+    file = fopen(fileName, "rb");
+    FUZZ_ASSERT_MSG(file, fileName);
+    /* Read the file */
+    readSize = fread(buffer, 1, fileSize, file);
+    FUZZ_ASSERT_MSG(readSize == fileSize, fileName);
+    /* Close the file */
+    fclose(file);
+    /* Run the fuzz target */
+    LLVMFuzzerTestOneInput(buffer, fileSize);
+  }
+
+  ret = 0;
+  free(buffer);
+#ifdef UTIL_HAS_CREATEFILELIST
+  UTIL_freeFileList(files, fileNamesBuf);
+#endif
+  return ret;
+}