mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-28 05:21:13 +00:00
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.
|
|
Copyright (C) 2023 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
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
|
|
void
|
|
exported_function (int ignored)
|
|
{
|
|
/* This function is interposed from tst-dlclose-lazy-mod1.so and
|
|
thus never called. */
|
|
abort ();
|
|
}
|
|
|
|
static void __attribute__ ((constructor))
|
|
init (void)
|
|
{
|
|
puts ("info: tst-dlclose-lazy-mod2.so constructor called");
|
|
|
|
/* Trigger lazy binding to the definition in
|
|
tst-dlclose-lazy-mod1.so, but not for
|
|
lazily_bound_exported_function in that module. */
|
|
exported_function (0);
|
|
}
|
|
|
|
static void __attribute__ ((destructor))
|
|
fini (void)
|
|
{
|
|
puts ("info: tst-dlclose-lazy-mod2.so destructor called");
|
|
|
|
/* Trigger the lazily_bound_exported_function call in
|
|
exported_function in tst-dlclose-lazy-mod1.so. */
|
|
exported_function (1);
|
|
}
|