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d0f07f7df8
Previously, after destructors for a DSO have been invoked, ld.so refused to bind against that DSO in all cases. Relax this restriction somewhat if the referencing object is itself a DSO that is being unloaded. This assumes that the symbol reference is not going to be stored anywhere. The situation in the test case can arise fairly easily with C++ and objects that are built with different optimization levels and therefore define different functions with vague linkage. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
50 lines
1.5 KiB
C
50 lines
1.5 KiB
C
/* Lazy binding during dlclose. Indirectly loaded module.
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Copyright (C) 2023 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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<https://www.gnu.org/licenses/>. */
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#include <stdio.h>
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#include <stdlib.h>
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void
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exported_function (int ignored)
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{
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/* This function is interposed from tst-dlclose-lazy-mod1.so and
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thus never called. */
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abort ();
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}
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static void __attribute__ ((constructor))
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init (void)
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{
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puts ("info: tst-dlclose-lazy-mod2.so constructor called");
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/* Trigger lazy binding to the definition in
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tst-dlclose-lazy-mod1.so, but not for
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lazily_bound_exported_function in that module. */
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exported_function (0);
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}
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static void __attribute__ ((destructor))
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fini (void)
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{
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puts ("info: tst-dlclose-lazy-mod2.so destructor called");
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/* Trigger the lazily_bound_exported_function call in
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exported_function in tst-dlclose-lazy-mod1.so. */
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exported_function (1);
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}
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