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9f55d2e7c4
The data in the _ns_debug member must be preserved, otherwise _dl_debug_initialize enters an infinite loop. To be conservative, only clear the libc_map member for now, to fix bug 29528. Fixes commitd0e357ff45("elf: Call __libc_early_init for reused namespaces (bug 29528)"), by reverting most of it. Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com> (cherry picked from commit2c42257314) (Conflict in elf/dl-open.c due to missing _r_debug namespace support.)
55 lines
1.8 KiB
C
55 lines
1.8 KiB
C
/* Initialization of libc after dlmopen/dlclose/dlmopen (bug 29528). Main.
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Copyright (C) 2022 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 <support/check.h>
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#include <support/xdlfcn.h>
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/* Run the test multiple times, to check finding a new namespace while
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another namespace is already in use. This used to trigger bug 29600. */
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static void
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recurse (int depth)
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{
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if (depth == 0)
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return;
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printf ("info: running at depth %d\n", depth);
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void *handle = xdlmopen (LM_ID_NEWLM, "tst-dlmopen-twice-mod1.so",
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RTLD_NOW);
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xdlclose (handle);
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handle = xdlmopen (LM_ID_NEWLM, "tst-dlmopen-twice-mod2.so", RTLD_NOW);
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int (*run_check) (void) = xdlsym (handle, "run_check");
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TEST_COMPARE (run_check (), 0);
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recurse (depth - 1);
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xdlclose (handle);
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}
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static int
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do_test (void)
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{
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/* First run the test without nesting. */
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recurse (1);
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/* Then with nesting. The constant needs to be less than the
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internal DL_NNS namespace constant. */
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recurse (10);
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return 0;
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}
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#include <support/test-driver.c>
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