| /* Test error reporting for dlsym, dlvsym failures. |
| Copyright (C) 2016-2018 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; |
| } |
| |
| |
| #include <support/test-driver.c> |