mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-24 02:03:35 +08:00
125 lines
3.6 KiB
C
125 lines
3.6 KiB
C
/* Check DTAUDIT and vDSO interaction.
|
|
Copyright (C) 2021-2023 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 <errno.h>
|
|
#include <getopt.h>
|
|
#include <limits.h>
|
|
#include <inttypes.h>
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include <support/capture_subprocess.h>
|
|
#include <support/check.h>
|
|
#include <support/xstdio.h>
|
|
#include <support/support.h>
|
|
#include <sys/auxv.h>
|
|
|
|
static int restart;
|
|
#define CMDLINE_OPTIONS \
|
|
{ "restart", no_argument, &restart, 1 },
|
|
|
|
static uintptr_t vdso_addr;
|
|
|
|
static int
|
|
handle_restart (void)
|
|
{
|
|
fprintf (stderr, "vdso: %p\n", (void*) vdso_addr);
|
|
return 0;
|
|
}
|
|
|
|
static uintptr_t
|
|
parse_address (const char *str)
|
|
{
|
|
void *r;
|
|
TEST_COMPARE (sscanf (str, "%p\n", &r), 1);
|
|
return (uintptr_t) r;
|
|
}
|
|
|
|
static inline bool
|
|
startswith (const char *str, const char *pre)
|
|
{
|
|
size_t lenpre = strlen (pre);
|
|
size_t lenstr = strlen (str);
|
|
return lenstr >= lenpre && memcmp (pre, str, lenpre) == 0;
|
|
}
|
|
|
|
static int
|
|
do_test (int argc, char *argv[])
|
|
{
|
|
vdso_addr = getauxval (AT_SYSINFO_EHDR);
|
|
if (vdso_addr == 0)
|
|
FAIL_UNSUPPORTED ("getauxval (AT_SYSINFO_EHDR) returned 0");
|
|
|
|
/* We must have either:
|
|
- One our fource parameters left if called initially:
|
|
+ path to ld.so optional
|
|
+ "--library-path" optional
|
|
+ the library path optional
|
|
+ the application name */
|
|
if (restart)
|
|
return handle_restart ();
|
|
|
|
char *spargv[9];
|
|
int i = 0;
|
|
for (; i < argc - 1; i++)
|
|
spargv[i] = argv[i + 1];
|
|
spargv[i++] = (char *) "--direct";
|
|
spargv[i++] = (char *) "--restart";
|
|
spargv[i] = NULL;
|
|
|
|
setenv ("LD_AUDIT", "tst-auditmod22.so", 0);
|
|
struct support_capture_subprocess result
|
|
= support_capture_subprogram (spargv[0], spargv);
|
|
support_capture_subprocess_check (&result, "tst-audit22", 0, sc_allow_stderr);
|
|
|
|
/* The respawned process should always print the vDSO address (otherwise it
|
|
will fails as unsupported). However, on some architectures the audit
|
|
module might see the vDSO with l_addr being 0, meaning a fixed mapping
|
|
(linux-gate.so). In this case we don't check its value against
|
|
AT_SYSINFO_EHDR one. */
|
|
uintptr_t vdso_process = 0;
|
|
bool vdso_audit_found = false;
|
|
uintptr_t vdso_audit = 0;
|
|
|
|
FILE *out = fmemopen (result.err.buffer, result.err.length, "r");
|
|
TEST_VERIFY (out != NULL);
|
|
char *buffer = NULL;
|
|
size_t buffer_length = 0;
|
|
while (xgetline (&buffer, &buffer_length, out))
|
|
{
|
|
if (startswith (buffer, "vdso: "))
|
|
vdso_process = parse_address (buffer + strlen ("vdso: "));
|
|
else if (startswith (buffer, "vdso found: "))
|
|
{
|
|
vdso_audit = parse_address (buffer + strlen ("vdso found: "));
|
|
vdso_audit_found = true;
|
|
}
|
|
}
|
|
|
|
TEST_COMPARE (vdso_audit_found, true);
|
|
if (vdso_audit != 0)
|
|
TEST_COMPARE (vdso_process, vdso_audit);
|
|
|
|
free (buffer);
|
|
xfclose (out);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define TEST_FUNCTION_ARGV do_test
|
|
#include <support/test-driver.c>
|