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glibc/elf/tst-dlsym-error.c
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/* Test error reporting for dlsym, dlvsym failures. | |
Copyright (C) 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 <gnu/lib-names.h> | |
#include <stdio.h> | |
#include <stdlib.h> | |
#include <string.h> | |
/* Used to disambiguate symbol names. */ | |
static int counter; | |
static void | |
test_one (void *handle, const char *name, void *(func) (void *, const char *), | |
const char *suffix) | |
{ | |
++counter; | |
char symbol[32]; | |
snprintf (symbol, sizeof (symbol), "no_such_symbol_%d", counter); | |
char *expected_message; | |
if (asprintf (&expected_message, ": undefined symbol: %s%s", | |
symbol, suffix) < 0) | |
{ | |
printf ("error: asprintf: %m\n"); | |
abort (); | |
} | |
void *addr = func (handle, symbol); | |
if (addr != NULL) | |
{ | |
printf ("error: %s: found symbol \"no_such_symbol\"\n", name); | |
abort (); | |
} | |
const char *message = dlerror (); | |
if (message == NULL) | |
{ | |
printf ("error: %s: missing error message\n", name); | |
abort (); | |
} | |
const char *message_without_path = strchrnul (message, ':'); | |
if (strcmp (message_without_path, expected_message) != 0) | |
{ | |
printf ("error: %s: unexpected error message: %s\n", name, message); | |
abort (); | |
} | |
free (expected_message); | |
message = dlerror (); | |
if (message != NULL) | |
{ | |
printf ("error: %s: unexpected error message: %s\n", name, message); | |
abort (); | |
} | |
} | |
static void | |
test_handles (const char *name, void *(func) (void *, const char *), | |
const char *suffix) | |
{ | |
test_one (RTLD_DEFAULT, name, func, suffix); | |
test_one (RTLD_NEXT, name, func, suffix); | |
void *handle = dlopen (LIBC_SO, RTLD_LAZY); | |
if (handle == NULL) | |
{ | |
printf ("error: cannot dlopen %s: %s\n", LIBC_SO, dlerror ()); | |
abort (); | |
} | |
test_one (handle, name, func, suffix); | |
dlclose (handle); | |
} | |
static void * | |
dlvsym_no_such_version (void *handle, const char *name) | |
{ | |
return dlvsym (handle, name, "NO_SUCH_VERSION"); | |
} | |
static void * | |
dlvsym_glibc_private (void *handle, const char *name) | |
{ | |
return dlvsym (handle, name, "GLIBC_PRIVATE"); | |
} | |
static int | |
do_test (void) | |
{ | |
test_handles ("dlsym", dlsym, ""); | |
test_handles ("dlvsym", dlvsym_no_such_version, | |
", version NO_SUCH_VERSION"); | |
test_handles ("dlvsym", dlvsym_glibc_private, | |
", version GLIBC_PRIVATE"); | |
return 0; | |
} | |
#define TEST_FUNCTION do_test () | |
#include "../test-skeleton.c" |