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/* Global-scope DSO mapping test with a static executable (BZ #15022).
Copyright (C) 2013-2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <dlfcn.h>
#include <stddef.h>
#include <stdio.h>
#define MAGIC0 0
#define MAGIC1 0x5500ffaa
#define MAGIC2 0xaaff0055
/* Mapping a DSO into the global scope used to crash in static
executables. Check that it succeeds and then that symbols from
the DSO can be accessed and operate as expected. */
static int
do_test (void)
{
unsigned int (*getfoo) (void);
void (*setfoo) (unsigned int);
unsigned int *foop;
unsigned int foo;
void *handle;
/* Try to map a module into the global scope. */
handle = dlopen ("modstatic3.so", RTLD_LAZY | RTLD_GLOBAL);
if (handle == NULL)
{
printf ("dlopen (modstatic3.so): %s\n", dlerror ());
return 1;
}
/* Get at its symbols. */
foop = dlsym (handle, "foo");
if (foop == NULL)
{
printf ("dlsym (foo): %s\n", dlerror ());
return 1;
}
getfoo = dlsym (handle, "getfoo");
if (getfoo == NULL)
{
printf ("dlsym (getfoo): %s\n", dlerror ());
return 1;
}
setfoo = dlsym (handle, "setfoo");
if (setfoo == NULL)
{
printf ("dlsym (setfoo): %s\n", dlerror ());
return 1;
}
/* Make sure the view of the initial state is consistent. */
foo = *foop;
if (foo != MAGIC0)
{
printf ("*foop: got %#x, expected %#x\n", foo, MAGIC0);
return 1;
}
foo = getfoo ();
if (foo != MAGIC0)
{
printf ("getfoo: got %#x, expected %#x\n", foo, MAGIC0);
return 1;
}
/* Likewise with one change to its state. */
setfoo (MAGIC1);
foo = *foop;
if (foo != MAGIC1)
{
printf ("*foop: got %#x, expected %#x\n", foo, MAGIC1);
return 1;
}
foo = getfoo ();
if (foo != MAGIC1)
{
printf ("getfoo: got %#x, expected %#x\n", foo, MAGIC1);
return 1;
}
/* And with another. */
setfoo (MAGIC2);
foo = *foop;
if (foo != MAGIC2)
{
printf ("*foop: got %#x, expected %#x\n", foo, MAGIC2);
return 1;
}
foo = getfoo ();
if (foo != MAGIC2)
{
printf ("getfoo: got %#x, expected %#x\n", foo, MAGIC2);
return 1;
}
/* All done, clean up. */
getfoo = NULL;
setfoo = NULL;
foop = NULL;
dlclose (handle);
return 0;
}
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"
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