129 lines
3.0 KiB
C
129 lines
3.0 KiB
C
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/* Global-scope DSO mapping test with a static executable (BZ #15022).
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Copyright (C) 2013-2022 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 <dlfcn.h>
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#include <stddef.h>
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#include <stdio.h>
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#define MAGIC0 0
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#define MAGIC1 0x5500ffaa
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#define MAGIC2 0xaaff0055
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/* Mapping a DSO into the global scope used to crash in static
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executables. Check that it succeeds and then that symbols from
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the DSO can be accessed and operate as expected. */
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static int
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do_test (void)
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{
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unsigned int (*getfoo) (void);
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void (*setfoo) (unsigned int);
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unsigned int *foop;
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unsigned int foo;
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void *handle;
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/* Try to map a module into the global scope. */
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handle = dlopen ("modstatic3.so", RTLD_LAZY | RTLD_GLOBAL);
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if (handle == NULL)
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{
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printf ("dlopen (modstatic3.so): %s\n", dlerror ());
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return 1;
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}
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/* Get at its symbols. */
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foop = dlsym (handle, "foo");
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if (foop == NULL)
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{
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printf ("dlsym (foo): %s\n", dlerror ());
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return 1;
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}
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getfoo = dlsym (handle, "getfoo");
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if (getfoo == NULL)
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{
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printf ("dlsym (getfoo): %s\n", dlerror ());
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return 1;
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}
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setfoo = dlsym (handle, "setfoo");
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if (setfoo == NULL)
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{
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printf ("dlsym (setfoo): %s\n", dlerror ());
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return 1;
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}
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/* Make sure the view of the initial state is consistent. */
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foo = *foop;
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if (foo != MAGIC0)
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{
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printf ("*foop: got %#x, expected %#x\n", foo, MAGIC0);
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return 1;
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}
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foo = getfoo ();
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if (foo != MAGIC0)
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{
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printf ("getfoo: got %#x, expected %#x\n", foo, MAGIC0);
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return 1;
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}
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/* Likewise with one change to its state. */
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setfoo (MAGIC1);
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foo = *foop;
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if (foo != MAGIC1)
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{
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printf ("*foop: got %#x, expected %#x\n", foo, MAGIC1);
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return 1;
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}
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foo = getfoo ();
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if (foo != MAGIC1)
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{
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printf ("getfoo: got %#x, expected %#x\n", foo, MAGIC1);
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return 1;
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}
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/* And with another. */
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setfoo (MAGIC2);
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foo = *foop;
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if (foo != MAGIC2)
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{
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printf ("*foop: got %#x, expected %#x\n", foo, MAGIC2);
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return 1;
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}
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foo = getfoo ();
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if (foo != MAGIC2)
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{
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printf ("getfoo: got %#x, expected %#x\n", foo, MAGIC2);
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return 1;
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}
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/* All done, clean up. */
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getfoo = NULL;
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setfoo = NULL;
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foop = NULL;
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dlclose (handle);
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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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