mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-21 20:40:05 +00:00
d0e357ff45
libc_map is never reset to NULL, neither during dlclose nor on a dlopen call which reuses the namespace structure. As a result, if a namespace is reused, its libc is not initialized properly. The most visible result is a crash in the <ctype.h> functions. To prevent similar bugs on namespace reuse from surfacing, unconditionally initialize the chosen namespace to zero using memset.
38 lines
1.3 KiB
C
38 lines
1.3 KiB
C
/* Initialization of libc after dlmopen/dlclose/dlmopen (bug 29528). Module 1.
|
|
Copyright (C) 2022 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 <stdio.h>
|
|
|
|
static void __attribute__ ((constructor))
|
|
init (void)
|
|
{
|
|
puts ("info: tst-dlmopen-twice-mod1.so loaded");
|
|
fflush (stdout);
|
|
}
|
|
|
|
static void __attribute__ ((destructor))
|
|
fini (void)
|
|
{
|
|
puts ("info: tst-dlmopen-twice-mod1.so about to be unloaded");
|
|
fflush (stdout);
|
|
}
|
|
|
|
/* Large allocation. The second module does not have this, so it
|
|
should load libc at a different address. */
|
|
char large_allocate[16 * 1024 * 1024];
|