elf/tst-audit25b.c

   1 /* Check LD_AUDIT and LD_BIND_NOW.
   2    Copyright (C) 2022-2023 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 <errno.h>
  21 #include <getopt.h>
  22 #include <limits.h>
  23 #include <inttypes.h>
  24 #include <string.h>
  25 #include <stdlib.h>
  26 #include <support/capture_subprocess.h>
  27 #include <support/check.h>
  28 #include <support/xstdio.h>
  29 #include <support/support.h>
  30 #include <sys/auxv.h>
  31
  32 #include "tst-audit25.h"
  33
  34 static int restart;
  35 #define CMDLINE_OPTIONS \
  36   { "restart", no_argument, &restart, 1 },
  37
  38 void tst_audit25mod1_func1 (void);
  39 void tst_audit25mod1_func2 (void);
  40 void tst_audit25mod2_func1 (void);
  41 void tst_audit25mod2_func2 (void);
  42
  43 static int
  44 handle_restart (void)
  45 {
  46   tst_audit25mod1_func1 ();
  47   tst_audit25mod1_func2 ();
  48   tst_audit25mod2_func1 ();
  49   tst_audit25mod2_func2 ();
  50
  51   return 0;
  52 }
  53
  54 static int
  55 do_test (int argc, char *argv[])
  56 {
  57   /* We must have either:
  58      - One or four parameters left if called initially:
  59        + path to ld.so         optional
  60        + "--library-path"      optional
  61        + the library path      optional
  62        + the application name  */
  63
  64   if (restart)
  65     return handle_restart ();
  66
  67   setenv ("LD_AUDIT", "tst-auditmod25.so", 0);
  68
  69   char *spargv[9];
  70   int i = 0;
  71   for (; i < argc - 1; i++)
  72     spargv[i] = argv[i + 1];
  73   spargv[i++] = (char *) "--direct";
  74   spargv[i++] = (char *) "--restart";
  75   spargv[i] = NULL;
  76
  77   {
  78     struct support_capture_subprocess result
  79       = support_capture_subprogram (spargv[0], spargv);
  80     support_capture_subprocess_check (&result, "tst-audit25a", 0,
  81                                       sc_allow_stderr);
  82
  83     /* tst-audit25a and tst-audit25mod1 are built with -Wl,-z,now, but
  84        tst-audit25mod2 is built with -Wl,-z,lazy.  So only
  85        tst_audit25mod4_func1 (called by tst_audit25mod2_func1) should not
  86        have LA_SYMB_NOPLTENTER | LA_SYMB_NOPLTEXIT.  */
  87     const char *expected[] =
  88       {
  89         "la_symbind: tst_audit25mod3_func1 1\n",
  90         "la_symbind: tst_audit25mod1_func1 1\n",
  91         "la_symbind: tst_audit25mod2_func1 1\n",
  92         "la_symbind: tst_audit25mod1_func2 1\n",
  93         "la_symbind: tst_audit25mod2_func2 1\n",
  94         "la_symbind: tst_audit25mod4_func1 0\n",
  95       };
  96     compare_output (result.err.buffer, result.err.length,
  97                     expected, array_length(expected));
  98
  99     support_capture_subprocess_free (&result);
 100   }
 101
 102   {
 103     setenv ("LD_BIND_NOW", "1", 0);
 104     struct support_capture_subprocess result
 105       = support_capture_subprogram (spargv[0], spargv);
 106     support_capture_subprocess_check (&result, "tst-audit25a", 0,
 107                                       sc_allow_stderr);
 108
 109     /* With LD_BIND_NOW all symbols are expected to have
 110        LA_SYMB_NOPLTENTER | LA_SYMB_NOPLTEXIT.  Also the resolution
 111        order is done in breadth-first order.  */
 112     const char *expected[] =
 113       {
 114         "la_symbind: tst_audit25mod4_func1 1\n",
 115         "la_symbind: tst_audit25mod3_func1 1\n",
 116         "la_symbind: tst_audit25mod1_func1 1\n",
 117         "la_symbind: tst_audit25mod2_func1 1\n",
 118         "la_symbind: tst_audit25mod1_func2 1\n",
 119         "la_symbind: tst_audit25mod2_func2 1\n",
 120       };
 121     compare_output (result.err.buffer, result.err.length,
 122                     expected, array_length(expected));
 123
 124     support_capture_subprocess_free (&result);
 125   }
 126
 127   return 0;
 128 }
 129
 130 #define TEST_FUNCTION_ARGV do_test
 131 #include <support/test-driver.c>