glibc/elf/tst-dlopen-auditdupmod.c
Florian Weimer 43db5e2c06 elf: Signal RT_CONSISTENT after relocation processing in dlopen (bug 31986)
Previously, a la_activity audit event was generated before
relocation processing completed.  This does did not match what
happened during initial startup in elf/rtld.c (towards the end
of dl_main).  It also caused various problems if an auditor
tried to open the same shared object again using dlmopen:
If it was the directly loaded object, it had a search scope
associated with it, so the early exit in dl_open_worker_begin
was taken even though the object was unrelocated.  This caused
the r_state == RT_CONSISTENT assert to fail.  Avoidance of the
assert also depends on reversing the order of r_state update
and auditor event (already implemented in a previous commit).

At the later point, args->map can be NULL due to failure,
so use the assigned namespace ID instead if that is available.

Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
2024-10-25 16:54:22 +02:00

49 lines
1.6 KiB
C

/* Directly opened test module that gets reopened from the auditor.
Copyright (C) 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/>. */
#include <stdio.h>
#include <stdlib.h>
#include <support/xdlfcn.h>
int auditdupmod_status;
/* Used to check for successful relocation processing. */
int *auditdupmod_status_address = &auditdupmod_status;
static void __attribute__ ((constructor))
init (void)
{
++auditdupmod_status;
printf ("info: tst-dlopen-auditdupmod.so constructor called (status %d)\n",
auditdupmod_status);
}
static void __attribute__ ((destructor))
fini (void)
{
/* The tst-dlopen-auditdup-auditmod.so auditor incremented
auditdupmod_status. */
printf ("info: tst-dlopen-auditdupmod.so destructor called (status %d)\n",
auditdupmod_status);
if (auditdupmod_status != 2)
{
puts ("error: auditdupmod_status == 2 expected");
exit (1);
}
}