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/* Common code for tst-dlopen-tlsmodid, tst-dlopen-tlsmodid-pie,
tst-dlopen-tlsmodid-container.
Verify that incorrectly dlopen()ing an executable without
__RTLD_OPENEXEC does not cause assertion in ld.so, and that it
actually results in an error.
Copyright (C) 2014-2024 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/>. */
/* Before including this file, the macro TST_DLOPEN_TLSMODID_PATH must
be defined, to specify the path used for the open operation. */
#include <dlfcn.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <support/check.h>
#include <support/support.h>
#include <support/xthread.h>
__thread int x;
void *
fn (void *p)
{
return p;
}
/* Call dlopen and check that fails with an error message indicating
an attempt to open an ET_EXEC or PIE object. */
static void
check_dlopen_failure (void)
{
void *handle = dlopen (TST_DLOPEN_TLSMODID_PATH, RTLD_LAZY);
if (handle != NULL)
FAIL_EXIT1 ("dlopen succeeded unexpectedly: %s", TST_DLOPEN_TLSMODID_PATH);
const char *message = dlerror ();
TEST_VERIFY_EXIT (message != NULL);
if ((strstr (message,
"cannot dynamically load position-independent executable")
== NULL)
&& strstr (message, "cannot dynamically load executable") == NULL)
FAIL_EXIT1 ("invalid dlopen error message: \"%s\"", message);
}
static int
do_test (int argc, char *argv[])
{
int j;
for (j = 0; j < 100; ++j)
{
pthread_t thr;
check_dlopen_failure ();
/* We create threads to force TLS allocation, which triggers
the original bug i.e. running out of surplus slotinfo entries
for TLS. */
thr = xpthread_create (NULL, fn, NULL);
xpthread_join (thr);
}
check_dlopen_failure ();
return 0;
}
#define TEST_FUNCTION_ARGV do_test
#include <support/test-driver.c>
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