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/* Symbols with version hash zero should not match any version (bug 29190).
Copyright (C) 2025 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; see the file COPYING.LIB. If
not, see <https://www.gnu.org/licenses/>. */
#include <support/check.h>
#include <support/xdlfcn.h>
#include <stddef.h>
#include <string.h>
static int
do_test (void)
{
void *handle = xdlopen ("tst-version-hash-zero-mod.so", RTLD_NOW);
/* This used to crash because some struct r_found_version entries
with hash zero did not have valid version strings. */
TEST_VERIFY (xdlvsym (handle, "global_variable", "PPPPPPPPPPPP") != NULL);
/* Consistency check. */
TEST_VERIFY (xdlsym (handle, "global_variable")
== xdlvsym (handle, "global_variable", "PPPPPPPPPPPP"));
/* This symbol version is supposed to be missing. */
TEST_VERIFY (dlvsym (handle, "global_variable", "OTHER_VERSION") == NULL);
/* tst-version-hash-zero-refmod.so references
global_variable@@OTHER_VERSION and is expected to fail to load.
dlvsym sets the hidden flag during lookup. Relocation does not,
so this exercises a different failure case. */
TEST_VERIFY_EXIT (dlopen ("tst-version-hash-zero-refmod.so", RTLD_NOW)
== NULL);
const char *message = dlerror ();
if (strstr (message,
": undefined symbol: global_variable, version OTHER_VERSION")
== NULL)
FAIL_EXIT1 ("unexpected dlopen failure: %s", message);
xdlclose (handle);
return 0;
}
#include <support/test-driver.c>
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