mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-25 22:40:05 +00:00
93 lines
2.4 KiB
C
93 lines
2.4 KiB
C
/* TLS modid gap reuse regression test for bug 29039.
|
|
Copyright (C) 2023-2024 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
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <stdio.h>
|
|
#include <dlfcn.h>
|
|
#include <pthread.h>
|
|
#include <support/xdlfcn.h>
|
|
#include <support/xthread.h>
|
|
#include <support/check.h>
|
|
|
|
static void *mod[3];
|
|
#define MOD(i) "tst-tlsgap-mod" #i ".so"
|
|
static const char *modname[3] = { MOD(0), MOD(1), MOD(2) };
|
|
#undef MOD
|
|
|
|
static void
|
|
open_mod (int i)
|
|
{
|
|
mod[i] = xdlopen (modname[i], RTLD_LAZY);
|
|
printf ("open %s\n", modname[i]);
|
|
}
|
|
|
|
static void
|
|
close_mod (int i)
|
|
{
|
|
xdlclose (mod[i]);
|
|
mod[i] = NULL;
|
|
printf ("close %s\n", modname[i]);
|
|
}
|
|
|
|
static void
|
|
access_mod (int i, const char *sym)
|
|
{
|
|
int *(*f) (void) = xdlsym (mod[i], sym);
|
|
int *p = f ();
|
|
printf ("access %s: %s() = %p\n", modname[i], sym, p);
|
|
TEST_VERIFY_EXIT (p != NULL);
|
|
++*p;
|
|
}
|
|
|
|
static void *
|
|
start (void *arg)
|
|
{
|
|
/* The DTV generation is at the last dlopen of mod0 and the
|
|
entry for mod1 is NULL. */
|
|
|
|
open_mod (1); /* Reuse modid of mod1. Uses dynamic TLS. */
|
|
|
|
/* DTV is unchanged: dlopen only updates the DTV to the latest
|
|
generation if static TLS is allocated for a loaded module.
|
|
|
|
With bug 29039, the TLSDESC relocation in mod1 uses the old
|
|
dlclose generation of mod1 instead of the new dlopen one so
|
|
DTV is not updated on TLS access. */
|
|
|
|
access_mod (1, "f1");
|
|
|
|
return arg;
|
|
}
|
|
|
|
static int
|
|
do_test (void)
|
|
{
|
|
open_mod (0);
|
|
open_mod (1);
|
|
open_mod (2);
|
|
close_mod (0);
|
|
close_mod (1); /* Create modid gap at mod1. */
|
|
open_mod (0); /* Reuse modid of mod0, bump generation count. */
|
|
|
|
/* Create a thread where DTV of mod1 is NULL. */
|
|
pthread_t t = xpthread_create (NULL, start, NULL);
|
|
xpthread_join (t);
|
|
return 0;
|
|
}
|
|
|
|
#include <support/test-driver.c>
|