Validate MessageHeader before using

mojo/public/tests/test_support_private.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "mojo/public/tests/test_support_private.h"
 
 #include <assert.h>
-#include <stddef.h>
 #include <stdio.h>
+#include <stdlib.h>
 
 static mojo::test::TestSupport* g_test_support = NULL;
 
 extern "C" {
 
 void MojoTestSupportLogPerfResult(const char* test_name,
                                   double value,
                                   const char* units) {
   if (g_test_support)
     g_test_support->LogPerfResult(test_name, value, units);
   else
     printf("[no test runner]\t%s\t%g\t%s\n", test_name, value, units);
 }
 
+FILE* MojoTestSupportOpenSourceRootRelativeFile(const char* relative_path) {
+  if (g_test_support)
+    return g_test_support->OpenSourceRootRelativeFile(relative_path);
+  printf("[no test runner]\n");
+  return NULL;
+}
+
+char** MojoTestSupportEnumerateSourceRootRelativeDirectory(
+    const char* relative_path) {
+  if (g_test_support)
+    return g_test_support->EnumerateSourceRootRelativeDirectory(relative_path);
+
+  printf("[no test runner]\n");
+
+  // Return empty list:
+  char** rv = static_cast<char**>(calloc(1, sizeof(char*)));
+  rv[0] = NULL;
+  return rv;
+}
+
 }  // extern "C"
 
 namespace mojo {
 namespace test {
 
 TestSupport::~TestSupport() {
 }
 
 // static
 void TestSupport::Init(TestSupport* test_support) {
   assert(!g_test_support);
   g_test_support = test_support;
 }
 
 // static
 TestSupport* TestSupport::Get() {
   return g_test_support;
 }
 
 // static
 void TestSupport::Reset() {
   g_test_support = NULL;
 }
 
 }  // namespace test
 }  // namespace mojo