elf/tst-tunables-enable_secure.c

   1 /* Check GLIBC_TUNABLES parsing for enable_secure.
   2    Copyright (C) 2024 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <array_length.h>
  20 #include <dl-tunables.h>
  21 #include <getopt.h>
  22 #include <intprops.h>
  23 #include <stdint.h>
  24 #include <stdlib.h>
  25 #include <support/capture_subprocess.h>
  26 #include <support/check.h>
  27 #include <sys/auxv.h>
  28 #include <unistd.h>
  29
  30 static int restart;
  31 #define CMDLINE_OPTIONS \
  32   { "restart", no_argument, &restart, 1 },
  33
  34 static const struct test_t
  35 {
  36   const char *env;
  37   int32_t expected_malloc_check;
  38   int32_t expected_enable_secure;
  39 } tests[] =
  40 {
  41   /* Expected tunable format.  */
  42   /* Tunables should be ignored if enable_secure is set. */
  43   {
  44     "glibc.malloc.check=2:glibc.rtld.enable_secure=1",
  45     0,
  46     1,
  47   },
  48   /* Tunables should be ignored if enable_secure is set. */
  49   {
  50     "glibc.rtld.enable_secure=1:glibc.malloc.check=2",
  51     0,
  52     1,
  53   },
  54   /* Tunables should be set if enable_secure is unset. */
  55   {
  56     "glibc.rtld.enable_secure=0:glibc.malloc.check=2",
  57     2,
  58     0,
  59   },
  60 };
  61
  62 static int
  63 handle_restart (int i)
  64 {
  65   if (tests[i].expected_enable_secure == 1)
  66     {
  67       TEST_COMPARE (1, __libc_enable_secure);
  68     }
  69   else
  70     {
  71       TEST_COMPARE (tests[i].expected_malloc_check,
  72                     TUNABLE_GET_FULL (glibc, malloc, check, int32_t, NULL));
  73       TEST_COMPARE (tests[i].expected_enable_secure,
  74                     TUNABLE_GET_FULL (glibc, rtld, enable_secure, int32_t,
  75                     NULL));
  76     }
  77   return 0;
  78 }
  79
  80 static int
  81 do_test (int argc, char *argv[])
  82 {
  83   /* We must have either:
  84      - One or four parameters left if called initially:
  85        + path to ld.so         optional
  86        + "--library-path"      optional
  87        + the library path      optional
  88        + the application name
  89        + the test to check  */
  90
  91   TEST_VERIFY_EXIT (argc == 2 || argc == 5);
  92
  93   if (restart)
  94     return handle_restart (atoi (argv[1]));
  95
  96   char nteststr[INT_BUFSIZE_BOUND (int)];
  97
  98   char *spargv[10];
  99   {
 100     int i = 0;
 101     for (; i < argc - 1; i++)
 102       spargv[i] = argv[i + 1];
 103     spargv[i++] = (char *) "--direct";
 104     spargv[i++] = (char *) "--restart";
 105     spargv[i++] = nteststr;
 106     spargv[i] = NULL;
 107   }
 108
 109   for (int i = 0; i < array_length (tests); i++)
 110     {
 111       snprintf (nteststr, sizeof nteststr, "%d", i);
 112
 113       printf ("[%d] Spawned test for %s\n", i, tests[i].env);
 114       setenv ("GLIBC_TUNABLES", tests[i].env, 1);
 115       struct support_capture_subprocess result
 116         = support_capture_subprogram (spargv[0], spargv);
 117       support_capture_subprocess_check (&result, "tst-tunables-enable_secure",
 118                                         0, sc_allow_stderr);
 119       support_capture_subprocess_free (&result);
 120     }
 121
 122   return 0;
 123 }
 124
 125 #define TEST_FUNCTION_ARGV do_test
 126 #include <support/test-driver.c>