1 files changed, 39 insertions, 0 deletions
diff --git a/dlfcn/libc_dlerror_result.c b/dlfcn/libc_dlerror_result.c
new file mode 100644
index 0000000000..99747186b9
--- /dev/null
+++ b/dlfcn/libc_dlerror_result.c
@@ -0,0 +1,39 @@
+/* Thread-local variable holding the dlerror result.
+   Copyright (C) 2021 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <dlerror.h>
+
+/* This pointer is either NULL, dl_action_result_malloc_failed (), or
+   has been allocated using malloc by the namespace that also contains
+   this instance of the thread-local variable.  */
+__thread struct dl_action_result *__libc_dlerror_result attribute_tls_model_ie;
+
+/* Called during thread shutdown to free resources.  */
+void
+__libc_dlerror_result_free (void)
+{
+  if (__libc_dlerror_result != NULL)
+    {
+      if (__libc_dlerror_result != dl_action_result_malloc_failed)
+        {
+          dl_action_result_errstring_free (__libc_dlerror_result);
+          free (__libc_dlerror_result);
+        }
+      __libc_dlerror_result = NULL;
+    }
+}