glibc/stdlib/tst-tls-atexit-lib.c

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/* Verify that DSO is unloaded only if its TLS objects are destroyed - the DSO.
Copyright (C) 2013-2016 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 <stdlib.h>
extern void *__dso_handle;
typedef struct
{
void *val;
} A;
/* We only care about the destructor. */
void A_dtor (void *obj)
{
((A *)obj)->val = obj;
}
void reg_dtor (void)
{
static __thread A b;
__cxa_thread_atexit_impl (A_dtor, &b, __dso_handle);
}