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ead3cea7d8
The commit b632bdd3 moved the setting of the DF_1_NODELETE flag earlier
in the dl_open_worker function. However when calling dlopen with both
RTLD_NODELETE and RTLD_NOLOAD, the pointer returned by _dl_map_object is
NULL. This condition is checked just after setting the flag, while it
should be done before. Fix that.
Changelog:
[BZ #19810]
* elf/dl-open.c (dl_open_worker): Set DF_1_NODELETE flag later.
* elf/tst-noload.c: New test case.
* elf/Makefile (tests): Add tst-noload.
74 lines
2.0 KiB
C
74 lines
2.0 KiB
C
/* Verify that RTLD_NOLOAD works as expected.
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Copyright (C) 2016 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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#include <dlfcn.h>
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#include <stdio.h>
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#include <gnu/lib-names.h>
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static int
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do_test (void)
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{
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/* Test that no object is loaded with RTLD_NOLOAD. */
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void *h1 = dlopen (LIBM_SO, RTLD_LAZY | RTLD_NOLOAD);
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if (h1 != NULL)
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{
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printf ("h1: DSO has been loaded while it should have not\n");
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return 1;
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}
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/* This used to segfault in some glibc versions. */
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void *h2 = dlopen (LIBM_SO, RTLD_LAZY | RTLD_NOLOAD | RTLD_NODELETE);
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if (h2 != NULL)
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{
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printf ("h2: DSO has been loaded while it should have not\n");
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return 1;
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}
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/* Test that loading an already loaded object returns the same. */
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void *h3 = dlopen (LIBM_SO, RTLD_LAZY);
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if (h3 == NULL)
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{
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printf ("h3: failed to open DSO: %s\n", dlerror ());
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return 1;
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}
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void *h4 = dlopen (LIBM_SO, RTLD_LAZY | RTLD_NOLOAD);
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if (h4 == NULL)
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{
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printf ("h4: failed to open DSO: %s\n", dlerror ());
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return 1;
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}
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if (h4 != h3)
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{
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printf ("h4: should return the same object\n");
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return 1;
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}
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/* Cleanup */
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if (dlclose (h3) != 0)
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{
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printf ("h3: dlclose failed: %s\n", dlerror ());
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return 1;
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}
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return 0;
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}
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#define TEST_FUNCTION do_test ()
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#include "../test-skeleton.c"
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