tests/regression/ust/ust-dl/prog.c

   1 /* _GNU_SOURCE is defined by config.h */
   2 #include <dlfcn.h>
   3 #include <stdio.h>
   4 #include <errno.h>
   5 #include <unistd.h>
   6 #include <stdlib.h>
   7
   8 /*
   9  * libfoo has a direct dependency on libbar.
  10  * libbar has a direct dependency on libzzz.
  11  * This test is therefore a mix of dlopen/dlclose and dlmopen/dlclose of
  12  * libfoo, and of its direct dependencies.
  13  */
  14 int main(int argc, char **argv)
  15 {
  16         void *h0, *h2, *h3, *h4;
  17
  18 #ifdef HAVE_DLMOPEN
  19         void *h1;
  20 #endif
  21
  22         char *error;
  23         int (*foo)(void);
  24
  25         h0 = dlopen("libbar.so", RTLD_LAZY);
  26         if (!h0) {
  27                 goto get_error;
  28         }
  29
  30 #ifdef HAVE_DLMOPEN
  31         h1 = dlmopen(LM_ID_BASE, "libfoo.so", RTLD_LAZY);
  32         if (!h1) {
  33                 goto get_error;
  34         }
  35 #endif
  36
  37         h2 = dlopen("libzzz.so", RTLD_LAZY);
  38         if (!h2) {
  39                 goto get_error;
  40         }
  41         h3 = dlopen("libfoo.so", RTLD_LAZY);
  42         if (!h3) {
  43                 goto get_error;
  44         }
  45         h4 = dlopen("libfoo.so", RTLD_LAZY);
  46         if (!h4) {
  47                 goto get_error;
  48         }
  49
  50         foo = dlsym(h3, "foo");
  51         error = dlerror();
  52         if (error != NULL) {
  53                 goto error;
  54         }
  55
  56         foo();
  57
  58         if (dlclose(h0)) {
  59                 goto get_error;
  60         }
  61
  62 #ifdef HAVE_DLMOPEN
  63         if (dlclose(h1)) {
  64                 goto get_error;
  65         }
  66 #endif
  67
  68         if (dlclose(h2)) {
  69                 goto get_error;
  70         }
  71         if (dlclose(h3)) {
  72                 goto get_error;
  73         }
  74         if (dlclose(h4)) {
  75                 goto get_error;
  76         }
  77
  78         exit(EXIT_SUCCESS);
  79
  80 get_error:
  81         error = dlerror();
  82 error:
  83         fprintf(stderr, "%s\n", error);
  84         exit(EXIT_FAILURE);
  85 }