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glibc/dlfcn/tststatic3.c
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/* Global-scope DSO mapping test with a static executable (BZ #15022). | |
Copyright (C) 2013-2016 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 | |
<http://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" |