50 lines
1.7 KiB
C
50 lines
1.7 KiB
C
/* Check that dlfcn errors are reported properly after dlmopen.
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Copyright (C) 2021-2022 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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<http://www.gnu.org/licenses/>. */
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#include <stddef.h>
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#include <string.h>
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#include <support/check.h>
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#include <support/xdlfcn.h>
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static int
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do_test (void)
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{
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void *handle = xdlmopen (LM_ID_NEWLM, "tst-dlmopen-dlerror-mod.so",
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RTLD_NOW);
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void (*call_dlsym) (const char *name) = xdlsym (handle, "call_dlsym");
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void (*call_dlopen) (const char *name) = xdlsym (handle, "call_dlopen");
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/* Iterate over various name lengths. This changes the size of
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error messages allocated by ld.so and has been shown to trigger
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detectable heap corruption if malloc/free calls in different
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namespaces are mixed. */
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char buffer[2048];
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char *buffer_end = &buffer[sizeof (buffer) - 2];
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for (char *p = stpcpy (buffer, "does not exist "); p < buffer_end; ++p)
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{
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p[0] = 'X';
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p[1] = '\0';
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call_dlsym (buffer);
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call_dlopen (buffer);
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}
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return 0;
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}
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#include <support/test-driver.c>
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