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/* Check GLIBC_TUNABLES parsing for enable_secure.
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 <array_length.h>
/* The test uses the tunable_env_alias_list size, which is only exported for
ld.so. This will result in a copy of tunable_list and
tunable_env_alias_list, which is ununsed by the test itself. */
#define TUNABLES_INTERNAL 1
#include <dl-tunables.h>
#include <getopt.h>
#include <intprops.h>
#include <stdint.h>
#include <stdlib.h>
#include <support/capture_subprocess.h>
#include <support/check.h>
#include <sys/auxv.h>
#include <unistd.h>
static int restart;
#define CMDLINE_OPTIONS \
{ "restart", no_argument, &restart, 1 },
static const struct test_t
{
const char *env;
const char *extraenv;
bool check_multiple;
int32_t expected_malloc_check;
int32_t expected_enable_secure;
} tests[] =
{
/* Expected tunable format. */
/* Tunables should be ignored if enable_secure is set. */
{
"GLIBC_TUNABLES=glibc.malloc.check=2:glibc.rtld.enable_secure=1",
NULL,
false,
0,
1,
},
/* Tunables should be ignored if enable_secure is set. */
{
"GLIBC_TUNABLES=glibc.rtld.enable_secure=1:glibc.malloc.check=2",
NULL,
false,
0,
1,
},
/* Tunables should be set if enable_secure is unset. */
{
"GLIBC_TUNABLES=glibc.rtld.enable_secure=0:glibc.malloc.check=2",
NULL,
false,
2,
0,
},
/* Tunables should be ignored if enable_secure is set. */
{
"GLIBC_TUNABLES=glibc.malloc.check=2:glibc.rtld.enable_secure=1",
"MALLOC_CHECK_=2",
false,
0,
1,
},
/* Same as before, but with enviroment alias prior GLIBC_TUNABLES. */
{
"MALLOC_CHECK_=2",
"GLIBC_TUNABLES=glibc.malloc.check=2:glibc.rtld.enable_secure=1",
false,
0,
1,
},
/* Tunables should be ignored if enable_secure is set. */
{
"GLIBC_TUNABLES=glibc.rtld.enable_secure=1:glibc.malloc.check=2",
"MALLOC_CHECK_=2",
false,
0,
1,
},
{
"MALLOC_CHECK_=2",
"GLIBC_TUNABLES=glibc.rtld.enable_secure=1:glibc.malloc.check=2",
false,
0,
1,
},
/* Tunables should be set if enable_secure is unset. */
{
"GLIBC_TUNABLES=glibc.rtld.enable_secure=0:glibc.malloc.check=2",
/* Tunable have precedence over the environment variable. */
"MALLOC_CHECK_=1",
false,
2,
0,
},
{
"MALLOC_CHECK_=1",
"GLIBC_TUNABLES=glibc.rtld.enable_secure=0:glibc.malloc.check=2",
/* Tunable have precedence over the environment variable. */
false,
2,
0,
},
/* Tunables should be set if enable_secure is unset. */
{
"GLIBC_TUNABLES=glibc.rtld.enable_secure=0",
/* Tunable have precedence over the environment variable. */
"MALLOC_CHECK_=1",
false,
1,
0,
},
/* Tunables should be set if enable_secure is unset. */
{
"GLIBC_TUNABLES=glibc.rtld.enable_secure=0",
/* Tunable have precedence over the environment variable. */
"MALLOC_CHECK_=1",
false,
1,
0,
},
/* Check with tunables environment variable alias set multiple times. */
{
"GLIBC_TUNABLES=glibc.rtld.enable_secure=1:glibc.malloc.check=2",
"MALLOC_CHECK_=2",
true,
0,
1,
},
/* Tunables should be set if enable_secure is unset. */
{
"GLIBC_TUNABLES=glibc.rtld.enable_secure=0",
/* Tunable have precedence over the environment variable. */
"MALLOC_CHECK_=1",
true,
1,
0,
},
};
static int
handle_restart (int i)
{
if (tests[i].expected_enable_secure == 1)
TEST_COMPARE (1, __libc_enable_secure);
else
TEST_COMPARE (tests[i].expected_enable_secure,
TUNABLE_GET_FULL (glibc, rtld, enable_secure, int32_t,
NULL));
TEST_COMPARE (tests[i].expected_malloc_check,
TUNABLE_GET_FULL (glibc, malloc, check, int32_t, NULL));
return 0;
}
static int
do_test (int argc, char *argv[])
{
/* We must have either:
- One or four parameters left if called initially:
+ path to ld.so optional
+ "--library-path" optional
+ the library path optional
+ the application name
+ the test to check */
TEST_VERIFY_EXIT (argc == 2 || argc == 5);
if (restart)
return handle_restart (atoi (argv[1]));
char nteststr[INT_BUFSIZE_BOUND (int)];
char *spargv[10];
{
int i = 0;
for (; i < argc - 1; i++)
spargv[i] = argv[i + 1];
spargv[i++] = (char *) "--direct";
spargv[i++] = (char *) "--restart";
spargv[i++] = nteststr;
spargv[i] = NULL;
}
enum { tunable_num_env_alias = array_length (tunable_env_alias_list) };
for (int i = 0; i < array_length (tests); i++)
{
snprintf (nteststr, sizeof nteststr, "%d", i);
printf ("[%d] Spawned test for %s\n", i, tests[i].env);
setenv ("GLIBC_TUNABLES", tests[i].env, 1);
char *envp[2 + tunable_num_env_alias + 1] =
{
(char *) tests[i].env,
(char *) tests[i].extraenv,
NULL,
};
if (tests[i].check_multiple)
{
int j;
for (j=0; j < tunable_num_env_alias; j++)
envp[j + 2] = (char *) tests[i].extraenv;
envp[j + 2] = NULL;
}
struct support_capture_subprocess result
= support_capture_subprogram (spargv[0], spargv, envp);
support_capture_subprocess_check (&result, "tst-tunables-enable_secure",
0, sc_allow_stderr);
support_capture_subprocess_free (&result);
}
return 0;
}
#define TEST_FUNCTION_ARGV do_test
#include <support/test-driver.c>
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