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365624e2d2
The assumption behind the assert in activate_nodelete was wrong:
Inconsistency detected by ld.so: dl-open.c: 459: activate_nodelete:
Assertion `!imap->l_init_called || imap->l_type != lt_loaded' failed! (edit)
It can happen that an already-loaded object that is in the local
scope is promoted to NODELETE status, via binding to a unique
symbol.
Similarly, it is possible that such NODELETE promotion occurs to
an already-loaded object from the global scope. This is why the
loop in activate_nodelete has to cover all objects in the namespace
of the new object.
In do_lookup_unique, it could happen that the NODELETE status of
an already-loaded object was overwritten with a pending NODELETE
status. As a result, if dlopen fails, this could cause a loss of
the NODELETE status of the affected object, eventually resulting
in an incorrect unload.
Fixes commit f63b73814f ("Remove all
loaded objects if dlopen fails, ignoring NODELETE [BZ #20839]").
43 lines
1.4 KiB
C++
43 lines
1.4 KiB
C++
/* First module defining a unique symbol (loaded indirectly).
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Copyright (C) 2019 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 "tst-dlopen-nodelete-reloc.h"
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#include <stdbool.h>
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#include <stdio.h>
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#include <unistd.h>
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/* Just a flag here, not used for NODELETE processing. */
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bool may_finalize_mod9 = false;
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/* Explicit instantiation. This produces a unique symbol definition
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which is not referenced by the library itself, so the library is
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not marked NODELETE. */
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template struct unique_symbol<9>;
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static void __attribute__ ((destructor))
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fini (void)
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{
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if (!may_finalize_mod9)
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{
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puts ("error: tst-dlopen-nodelete-reloc-mod9.so destructor"
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" called too early");
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_exit (1);
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}
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}
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