Resolve the executable path on Mac OS when sym-linked

runtime/bin/platform_win.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "platform/globals.h"
 #if defined(TARGET_OS_WINDOWS)
 
+#include "bin/file.h"
 #include "bin/platform.h"
 #include "bin/log.h"
 #include "bin/socket.h"
 #include "bin/utils.h"
 
 
 namespace dart {
 namespace bin {
 
 bool Platform::Initialize() {
@@ skipping 72 matching lines @@
   // Ensure no last error before calling GetModuleFileNameW.
   SetLastError(ERROR_SUCCESS);
   // Get the required length of the buffer.
   int path_length = GetModuleFileNameW(NULL, tmp_buffer, kTmpBufferSize);
   if (GetLastError() != ERROR_SUCCESS) {
     free(tmp_buffer);
     return NULL;
   }
   char* path = StringUtils::WideToUtf8(tmp_buffer);
   free(tmp_buffer);
-  return path;
+  // Return the canonical path as the returned path might contain symlinks.
+  char* canon_path = File::GetCanonicalPath(path);
+  free(path);
+  return canon_path;
 }
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_WINDOWS)