91 lines
2.7 KiB
C
91 lines
2.7 KiB
C
/* Bug 11941: Improper assert map->l_init_called in dlclose.
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Copyright (C) 2016-2018 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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/* This is the primary DSO that is loaded by the appliation. This DSO
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then loads a plugin with RTLD_NODELETE. This plugin depends on this
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DSO. This dependency chain means that at application shutdown the
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plugin will be destructed first. Thus by the time this DSO is
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destructed we will be calling dlclose on an object that has already
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been destructed. It is allowed to call dlclose in this way and
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should not assert. */
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#include <stdio.h>
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#include <stdlib.h>
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#include <dlfcn.h>
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/* Plugin to load. */
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static void *plugin_lib = NULL;
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/* Plugin function. */
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static void (*plugin_func) (void);
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#define LIB_PLUGIN "tst-nodelete-dlclose-plugin.so"
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/* This function is never called but the plugin references it.
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We do this to avoid any future --as-needed from removing the
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plugin's DT_NEEDED on this DSO (required for the test). */
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void
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primary_reference (void)
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{
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printf ("INFO: Called primary_reference function.\n");
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}
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void
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primary (void)
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{
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char *error;
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plugin_lib = dlopen (LIB_PLUGIN, RTLD_NOW | RTLD_LOCAL | RTLD_NODELETE);
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if (plugin_lib == NULL)
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{
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printf ("ERROR: Unable to load plugin library.\n");
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exit (EXIT_FAILURE);
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}
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dlerror ();
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plugin_func = (void (*) (void)) dlsym (plugin_lib, "plugin_func");
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error = dlerror ();
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if (error != NULL)
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{
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printf ("ERROR: Unable to find symbol with error \"%s\".",
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error);
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exit (EXIT_FAILURE);
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}
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return;
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}
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__attribute__ ((destructor))
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static void
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primary_dtor (void)
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{
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int ret;
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printf ("INFO: Calling primary destructor.\n");
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/* The destructor runs in the test driver also, which
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hasn't called primary, in that case do nothing. */
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if (plugin_lib == NULL)
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return;
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ret = dlclose (plugin_lib);
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if (ret != 0)
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{
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printf ("ERROR: Calling dlclose failed with \"%s\"\n",
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dlerror ());
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exit (EXIT_FAILURE);
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}
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}
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