mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-25 06:20:06 +00:00
f63b73814f
This introduces a “pending NODELETE” state in the link map, which is flipped to the persistent NODELETE state late in dlopen, via activate_nodelete. During initial relocation, symbol binding records pending NODELETE state only. dlclose ignores pending NODELETE state. Taken together, this results that a partially completed dlopen is rolled back completely because new NODELETE mappings are unloaded. Tested on x86_64-linux-gnu and i386-linux-gnu. Change-Id: Ib2a3d86af6f92d75baca65431d74783ee0dbc292
80 lines
2.9 KiB
C
80 lines
2.9 KiB
C
/* Test dlopen rollback after failures involving NODELETE objects (bug 20839).
|
|
Copyright (C) 2019 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/>. */
|
|
|
|
#include <dlfcn.h>
|
|
#include <errno.h>
|
|
#include <gnu/lib-names.h>
|
|
#include <stddef.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <support/check.h>
|
|
#include <support/xdlfcn.h>
|
|
|
|
static int
|
|
do_test (void)
|
|
{
|
|
/* This test uses libpthread as the canonical NODELETE module. If
|
|
libpthread is no longer NODELETE because it has been merged into
|
|
libc, the test needs to be updated. */
|
|
TEST_VERIFY (dlsym (NULL, "pthread_create") == NULL);
|
|
|
|
/* This is expected to fail because of the missing dependency. */
|
|
puts ("info: attempting to load tst-dlopenfailmod1.so");
|
|
TEST_VERIFY (dlopen ("tst-dlopenfailmod1.so", RTLD_LAZY) == NULL);
|
|
const char *message = dlerror ();
|
|
TEST_COMPARE_STRING (message,
|
|
"tst-dlopenfail-missingmod.so:"
|
|
" cannot open shared object file:"
|
|
" No such file or directory");
|
|
|
|
/* Do not probe for the presence of libpthread at this point because
|
|
that might trigger relocation if bug 20839 is present, obscuring
|
|
a subsequent crash. */
|
|
|
|
/* This is expected to succeed. */
|
|
puts ("info: loading tst-dlopenfailmod2.so");
|
|
void *handle = xdlopen ("tst-dlopenfailmod2.so", RTLD_NOW);
|
|
xdlclose (handle);
|
|
|
|
/* libpthread should remain loaded. */
|
|
TEST_VERIFY (dlopen (LIBPTHREAD_SO, RTLD_LAZY | RTLD_NOLOAD) != NULL);
|
|
TEST_VERIFY (dlsym (NULL, "pthread_create") == NULL);
|
|
|
|
/* We can make libpthread global, and then the symbol should become
|
|
available. */
|
|
TEST_VERIFY (dlopen (LIBPTHREAD_SO, RTLD_LAZY | RTLD_GLOBAL) != NULL);
|
|
TEST_VERIFY (dlsym (NULL, "pthread_create") != NULL);
|
|
|
|
/* sem_open is sufficiently complex to depend on relocations. */
|
|
void *(*sem_open_ptr) (const char *, int flag, ...)
|
|
= dlsym (NULL, "sem_open");
|
|
if (sem_open_ptr == NULL)
|
|
/* Hurd does not implement sem_open. */
|
|
puts ("warning: sem_open not found, further testing not possible");
|
|
else
|
|
{
|
|
errno = 0;
|
|
TEST_VERIFY (sem_open_ptr ("/", 0) == NULL);
|
|
TEST_COMPARE (errno, EINVAL);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#include <support/test-driver.c>
|