mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-21 20:40:05 +00:00
43db5e2c06
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>
101 lines
3.0 KiB
C
101 lines
3.0 KiB
C
/* Auditor that opens again an object that just has been opened.
|
|
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 <dlfcn.h>
|
|
#include <link.h>
|
|
#include <stdbool.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
unsigned int
|
|
la_version (unsigned int v)
|
|
{
|
|
return LAV_CURRENT;
|
|
}
|
|
|
|
static bool trigger_on_la_activity;
|
|
|
|
unsigned int
|
|
la_objopen (struct link_map *map, Lmid_t lmid, uintptr_t *cookie)
|
|
{
|
|
printf ("info: la_objopen: \"%s\"\n", map->l_name);
|
|
if (strstr (map->l_name, "/tst-dlopen-auditdupmod.so") != NULL)
|
|
trigger_on_la_activity = true;
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
la_activity (uintptr_t *cookie, unsigned int flag)
|
|
{
|
|
static unsigned int calls;
|
|
++calls;
|
|
printf ("info: la_activity: call %u (flag %u)\n", calls, flag);
|
|
fflush (stdout);
|
|
if (trigger_on_la_activity)
|
|
{
|
|
/* Avoid triggering on the dlmopen call below. */
|
|
static bool recursion;
|
|
if (recursion)
|
|
return;
|
|
recursion = true;
|
|
|
|
puts ("info: about to dlmopen tst-dlopen-auditdupmod.so");
|
|
fflush (stdout);
|
|
void *handle = dlmopen (LM_ID_BASE, "tst-dlopen-auditdupmod.so",
|
|
RTLD_NOW);
|
|
if (handle == NULL)
|
|
{
|
|
printf ("error: dlmopen: %s\n", dlerror ());
|
|
fflush (stdout);
|
|
_exit (1);
|
|
}
|
|
|
|
/* Check that the constructor has run. */
|
|
int *status = dlsym (handle, "auditdupmod_status");
|
|
if (status == NULL)
|
|
{
|
|
printf ("error: dlsym: %s\n", dlerror ());
|
|
fflush (stdout);
|
|
_exit (1);
|
|
}
|
|
printf ("info: auditdupmod_status == %d\n", *status);
|
|
if (*status != 1)
|
|
{
|
|
puts ("error: auditdupmod_status == 1 expected");
|
|
fflush (stdout);
|
|
_exit (1);
|
|
}
|
|
/* Checked in the destructor and the main program. */
|
|
++*status;
|
|
printf ("info: auditdupmod_status == %d\n", *status);
|
|
|
|
/* Check that the module has been relocated. */
|
|
int **status_address = dlsym (handle, "auditdupmod_status_address");
|
|
if (status_address == NULL || *status_address != status)
|
|
{
|
|
puts ("error: invalid auditdupmod_status address in"
|
|
" tst-dlopen-auditdupmod.so");
|
|
fflush (stdout);
|
|
_exit (1);
|
|
}
|
|
|
|
fflush (stdout);
|
|
}
|
|
}
|