dlfcn/tststatic2.c

   1 #include <dlfcn.h>
   2 #include <link.h>
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5 #include <string.h>
   6 #include <gnu/lib-names.h>
   7
   8 int
   9 main (void)
  10 {
  11   void *handle = dlopen ("modstatic2-nonexistent.so", RTLD_LAZY);
  12   if (handle == NULL)
  13     printf ("nonexistent: %s\n", dlerror ());
  14   else
  15     exit (1);
  16
  17   handle = dlopen ("modstatic2.so", RTLD_LAZY);
  18   if (handle == NULL)
  19     {
  20       printf ("%s\n", dlerror ());
  21       exit (1);
  22     }
  23
  24   int (*test) (FILE *, int);
  25   test = dlsym (handle, "test");
  26   if (test == NULL)
  27     {
  28       printf ("%s\n", dlerror ());
  29       exit (1);
  30     }
  31
  32   Dl_info info;
  33   int res = dladdr (test, &info);
  34   if (res == 0)
  35     {
  36       puts ("dladdr returned 0");
  37       exit (1);
  38     }
  39   else
  40     {
  41       if (strstr (info.dli_fname, "modstatic2.so") == NULL
  42           || strcmp (info.dli_sname, "test") != 0)
  43         {
  44           printf ("fname %s sname %s\n", info.dli_fname, info.dli_sname);
  45           exit (1);
  46         }
  47       if (info.dli_saddr != (void *) test)
  48         {
  49           printf ("saddr %p != test %p\n", info.dli_saddr, test);
  50           exit (1);
  51         }
  52     }
  53
  54   ElfW(Sym) *sym;
  55   void *symp;
  56   res = dladdr1 (test, &info, &symp, RTLD_DL_SYMENT);
  57   if (res == 0)
  58     {
  59       puts ("dladdr1 returned 0");
  60       exit (1);
  61     }
  62   else
  63     {
  64       if (strstr (info.dli_fname, "modstatic2.so") == NULL
  65           || strcmp (info.dli_sname, "test") != 0)
  66         {
  67           printf ("fname %s sname %s\n", info.dli_fname, info.dli_sname);
  68           exit (1);
  69         }
  70       if (info.dli_saddr != (void *) test)
  71         {
  72           printf ("saddr %p != test %p\n", info.dli_saddr, test);
  73           exit (1);
  74         }
  75       sym = symp;
  76       if (sym == NULL)
  77         {
  78           puts ("sym == NULL\n");
  79           exit (1);
  80         }
  81       if (ELF32_ST_BIND (sym->st_info) != STB_GLOBAL
  82           || ELF32_ST_VISIBILITY (sym->st_other) != STV_DEFAULT)
  83         {
  84           printf ("bind %d visibility %d\n",
  85                   (int) ELF32_ST_BIND (sym->st_info),
  86                   (int) ELF32_ST_VISIBILITY (sym->st_other));
  87           exit (1);
  88         }
  89     }
  90
  91   Lmid_t lmid;
  92   res = dlinfo (handle, RTLD_DI_LMID, &lmid);
  93   if (res != 0)
  94     {
  95       printf ("dlinfo returned %d %s\n", res, dlerror ());
  96       exit (1);
  97     }
  98   else if (lmid != LM_ID_BASE)
  99     {
 100       printf ("lmid %d != %d\n", (int) lmid, (int) LM_ID_BASE);
 101       exit (1);
 102     }
 103
 104   res = test (stdout, 2);
 105   if (res != 4)
 106     {
 107       printf ("Got %i, expected 4\n", res);
 108       exit (1);
 109     }
 110
 111   void *handle2 = dlopen (LIBDL_SO, RTLD_LAZY);
 112   if (handle2 == NULL)
 113     {
 114       printf ("libdl.so: %s\n", dlerror ());
 115       exit (1);
 116     }
 117
 118   if (dlvsym (handle2, "_dlfcn_hook", "GLIBC_PRIVATE") == NULL)
 119     {
 120       printf ("dlvsym: %s\n", dlerror ());
 121       exit (1);
 122     }
 123
 124   void *(*dlsymfn) (void *, const char *);
 125   dlsymfn = dlsym (handle2, "dlsym");
 126   if (dlsymfn == NULL)
 127     {
 128       printf ("dlsym \"dlsym\": %s\n", dlerror ());
 129       exit (1);
 130     }
 131   void *test2 = dlsymfn (handle, "test");
 132   if (test2 == NULL)
 133     {
 134       printf ("%s\n", dlerror ());
 135       exit (1);
 136     }
 137   else if (test2 != (void *) test)
 138     {
 139       printf ("test %p != test2 %p\n", test, test2);
 140       exit (1);
 141     }
 142
 143   dlclose (handle2);
 144   dlclose (handle);
 145
 146   handle = dlmopen (LM_ID_BASE, "modstatic2.so", RTLD_LAZY);
 147   if (handle == NULL)
 148     {
 149       printf ("%s\n", dlerror ());
 150       exit (1);
 151     }
 152   dlclose (handle);
 153
 154   handle = dlmopen (LM_ID_NEWLM, "modstatic2.so", RTLD_LAZY);
 155   if (handle == NULL)
 156     printf ("LM_ID_NEWLM: %s\n", dlerror ());
 157   else
 158     {
 159       puts ("LM_ID_NEWLM unexpectedly succeeded");
 160       exit (1);
 161     }
 162
 163   return 0;
 164 }