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, *h1, *h2, *h3, *h4;
  17         char *error;
  18         int (*foo)(void);
  19
  20         h0 = dlopen("libbar.so", RTLD_LAZY);
  21         if (!h0) {
  22                 goto get_error;
  23         }
  24         h1 = dlmopen(LM_ID_BASE, "libfoo.so", RTLD_LAZY);
  25         if (!h1) {
  26                 goto get_error;
  27         }
  28         h2 = dlopen("libzzz.so", RTLD_LAZY);
  29         if (!h2) {
  30                 goto get_error;
  31         }
  32         h3 = dlopen("libfoo.so", RTLD_LAZY);
  33         if (!h3) {
  34                 goto get_error;
  35         }
  36         h4 = dlopen("libfoo.so", RTLD_LAZY);
  37         if (!h4) {
  38                 goto get_error;
  39         }
  40
  41         foo = dlsym(h1, "foo");
  42         error = dlerror();
  43         if (error != NULL) {
  44                 goto error;
  45         }
  46
  47         foo();
  48
  49         if (dlclose(h0)) {
  50                 goto get_error;
  51         }
  52         if (dlclose(h1)) {
  53                 goto get_error;
  54         }
  55         if (dlclose(h2)) {
  56                 goto get_error;
  57         }
  58         if (dlclose(h3)) {
  59                 goto get_error;
  60         }
  61         if (dlclose(h4)) {
  62                 goto get_error;
  63         }
  64
  65         exit(EXIT_SUCCESS);
  66
  67 get_error:
  68         error = dlerror();
  69 error:
  70         fprintf(stderr, "%s\n", error);
  71         exit(EXIT_FAILURE);
  72 }