mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-12 19:13:34 +08:00
72 lines
2.1 KiB
C
72 lines
2.1 KiB
C
/* Make sure dlopen/dlclose are not marked as leaf functions.
|
|
|
|
Copyright (C) 2013-2016 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Mike Frysinger <vapier@gentoo.org>
|
|
|
|
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/>. */
|
|
|
|
/* The bug-dl-leaf.c file will call our lib_main directly. We do this to
|
|
keep things simple -- no need to use --export-dynamic with the linker
|
|
or build the main ELF as a PIE.
|
|
|
|
The lib_main func will modify some of its state while dlopening and
|
|
dlclosing the bug-dl-leaf-lib-cb.so library. The constructors and
|
|
destructors in that library will call back into this library to also
|
|
muck with state (the check_val_xxx funcs).
|
|
|
|
If dlclose/dlopen are marked as "leaf" functions, then with newer
|
|
versions of gcc, the state modification won't work correctly. */
|
|
|
|
#include <assert.h>
|
|
#include <dlfcn.h>
|
|
|
|
static int val = 1;
|
|
static int called = 0;
|
|
|
|
void check_val_init (void)
|
|
{
|
|
called = 1;
|
|
assert (val == 2);
|
|
}
|
|
|
|
void check_val_fini (void)
|
|
{
|
|
called = 2;
|
|
assert (val == 4);
|
|
}
|
|
|
|
int lib_main (void)
|
|
{
|
|
int ret;
|
|
void *hdl;
|
|
|
|
/* Make sure the constructor sees the updated val. */
|
|
val = 2;
|
|
hdl = dlopen ("bug-dl-leaf-lib-cb.so", RTLD_GLOBAL | RTLD_LAZY);
|
|
val = 3;
|
|
assert (hdl);
|
|
assert (called == 1);
|
|
|
|
/* Make sure the destructor sees the updated val. */
|
|
val = 4;
|
|
ret = dlclose (hdl);
|
|
val = 5;
|
|
assert (ret == 0);
|
|
assert (called == 2);
|
|
|
|
return !val;
|
|
}
|