b632bdd3f7
The DF_1_NODELETE flag is set too late when opening a DSO, due to which, if a DSO is already open, subsequently opening it with RTLD_NODELETE fails to set the DF_1_NODELETE flag. This patch fixes this by setting the flag immediately after bumping the opencount. Verified on x86_64. [BZ #18676] * elf/tst-nodelete-opened.c: New test case. * elf/tst-nodelete-opened-lib.c: New test case module. * elf/Makefile (tests, modules-names): Use them. * elf/dl-open.c (dl_open_worker): Set DF_1_NODELETE flag early.
68 lines
1.8 KiB
C
68 lines
1.8 KiB
C
/* Verify that an already opened DSO opened agained with RTLD_NODELETE actually
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sets the NODELETE flag.
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Copyright (C) 2015 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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int
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do_test (void)
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{
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void *h1 = dlopen ("$ORIGIN/tst-nodelete-opened-lib.so", RTLD_LAZY);
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if (h1 == NULL)
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{
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printf ("h1: failed to open DSO: %s\n", dlerror ());
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return 1;
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}
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void *h2 = dlopen ("$ORIGIN/tst-nodelete-opened-lib.so",
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RTLD_LAZY | RTLD_NODELETE);
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if (h2 == NULL)
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{
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printf ("h2: failed to open DSO: %s\n", dlerror ());
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return 1;
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}
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int *foo = dlsym (h2, "foo_var");
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if (foo == NULL)
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{
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printf ("failed to load symbol foo_var: %s\n", dlerror ());
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return 1;
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}
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if (dlclose (h1) != 0)
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{
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printf ("h1: dlclose failed: %s\n", dlerror ());
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return 1;
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}
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if (dlclose (h2) != 0)
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{
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printf ("h2: dlclose failed: %s\n", dlerror ());
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return 1;
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}
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printf ("foo == %d\n", *foo);
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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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