VBoot Reference: Output debug information using debug() instead of fprintf().

src/platform/vboot_reference/tests/firmware_verify_benchmark.c

 /* Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  *
  * Timing benchmark for verifying a firmware image.
  */
 
 #include <stdio.h>
 #include <stdlib.h>
 
@@ skipping 42 matching lines @@
   for (i = 0; i < NUM_SIZES_TO_TEST; ++i)
     firmware_blobs[i] = NULL;
 
   key_size = siglen_map[algorithm] * 8;  /* in bits. */
   snprintf(firmware_sign_key_file, FILE_NAME_SIZE, "testkeys/key_rsa%d.pem",
            key_size);
 
   snprintf(file_name, FILE_NAME_SIZE, "testkeys/key_rsa%d.keyb", key_size);
   firmware_sign_key = BufferFromFile(file_name, &len);
   if (!firmware_sign_key) {
-    fprintf(stderr, "Couldn't read pre-processed firmware signing key.\n");
+    debug("Couldn't read pre-processed firmware signing key.\n");
     error_code = 1;
     goto cleanup;
   }
 
   /* Generate test images. */
   for (i = 0; i < NUM_SIZES_TO_TEST; ++i) {
     firmware_blobs[i] = GenerateTestFirmwareBlob(algorithm,
                                                  firmware_sign_key,
                                                  1,  /* firmware key version. */
                                                  1,  /* firmware version. */
                                                  g_firmware_sizes_to_test[i],
                                                  "testkeys/key_rsa8192.pem",
                                                  firmware_sign_key_file);
     if (!firmware_blobs[i]) {
-      fprintf(stderr, "Couldn't generate test firmware images.\n");
+      debug("Couldn't generate test firmware images.\n");
       error_code = 1;
       goto cleanup;
     }
   }
 
   /* Get pre-processed key used for verification. */
   root_key_blob = BufferFromFile("testkeys/key_rsa8192.keyb", &len);
   if (!root_key_blob) {
-    fprintf(stderr, "Couldn't read pre-processed rootkey.\n");
+    debug("Couldn't read pre-processed rootkey.\n");
     error_code = 1;
     goto cleanup;
   }
 
   /* Now run the timing tests. */
   for (i = 0; i < NUM_SIZES_TO_TEST; ++i) {
     StartTimer(&ct);
     for (j = 0; j < NUM_OPERATIONS; ++j) {
       if (VERIFY_FIRMWARE_SUCCESS !=
           VerifyFirmware(root_key_blob, firmware_blobs[i]))
-        fprintf(stderr, "Warning: Firmware Verification Failed.\n");
+        debug("Warning: Firmware Verification Failed.\n");
     }
     StopTimer(&ct);
     msecs = (float) GetDurationMsecs(&ct) / NUM_OPERATIONS;
     fprintf(stderr,
             "# Firmware (%s, Algo = %s):"
             "\t%.02f ms/verification\n",
             g_firmware_size_labels[i],
             algo_strings[algorithm],
             msecs);
     fprintf(stdout, "ms_firmware_%s_rsa%d_%s:%.02f\n",
@@ skipping 12 matching lines @@
 
 
 int main(int argc, char* argv[]) {
   int i, error_code = 0;
   for (i = 0; i < kNumAlgorithms; ++i) {
     if (0 != (error_code = SpeedTestAlgorithm(i)))
       return error_code;
   }
   return 0;
 }