dlfcn/tst-dlinfo.c

   1 /* Test for dlinfo.
   2    Copyright (C) 2003-2019 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 <dlfcn.h>
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <error.h>
  23
  24 #define TEST_FUNCTION do_test ()
  25
  26 static int
  27 do_test (void)
  28 {
  29   int status = 0;
  30
  31   void *handle = dlopen ("glreflib3.so", RTLD_NOW);
  32   if (handle == NULL)
  33     error (EXIT_FAILURE, 0, "cannot load: glreflib1.so: %s", dlerror ());
  34
  35 #define TRY(req, arg)                                                         \
  36   if (dlinfo (handle, req, arg) != 0)                                         \
  37     {                                                                         \
  38       printf ("dlinfo failed for %s: %s\n", #req, dlerror ());                \
  39       status = 1;                                                             \
  40     }                                                                         \
  41   else
  42
  43   struct link_map *l;
  44   TRY (RTLD_DI_LINKMAP, &l)
  45     {
  46       if (l != handle)
  47         {
  48           printf ("bogus link_map? %p != %p\n", l, handle);
  49           status = 1;
  50         }
  51     }
  52
  53   char origin[8192];            /* >= PATH_MAX, in theory */
  54   TRY (RTLD_DI_ORIGIN, origin)
  55     {
  56       printf ("origin: %s\n", origin);
  57     }
  58
  59   Dl_serinfo counts;
  60   TRY (RTLD_DI_SERINFOSIZE, &counts)
  61     {
  62       Dl_serinfo *buf = alloca (counts.dls_size);
  63       buf->dls_cnt = counts.dls_cnt;
  64       buf->dls_size = counts.dls_size;
  65       printf ("%u library directories\n", buf->dls_cnt);
  66       TRY (RTLD_DI_SERINFO, buf)
  67         {
  68           if (counts.dls_cnt != buf->dls_cnt)
  69             {
  70               printf ("??? became %u library directories\n", buf->dls_cnt);
  71               status = 1;
  72             }
  73           for (unsigned int i = 0; i < buf->dls_cnt; ++i)
  74             printf ("\t%#02x\t%s\n",
  75                     buf->dls_serpath[i].dls_flags,
  76                     buf->dls_serpath[i].dls_name);
  77         }
  78     }
  79
  80   unsigned long int lmid = 0xdeadbeefUL;
  81   if (dlinfo (handle, RTLD_DI_LMID, &lmid) != 0)
  82     printf ("dlinfo refuses RTLD_DI_LMID: %s\n", dlerror ());
  83   else
  84     {
  85       printf ("dlinfo RTLD_DI_LMID worked? %#lx\n", lmid);
  86       status = lmid == 0xdeadbeefUL;
  87     }
  88
  89 #undef TRY
  90   dlclose (handle);
  91
  92   return status;
  93 }
  94
  95 #include "../test-skeleton.c"