src/tests/system/runtime_loader/test_suite/dlopen_resolve_order1

   1 #!/bin/sh
   2
   3 # program
   4 #
   5 # dlopen():
   6 # libb.so
   7 # liba.so
   8 #
   9 # Expected: Undefined symbol in liba.so resolves to symbol in program, not
  10 # to symbol in libb.so.
  11
  12
  13 . ./test_setup
  14
  15
  16 # create liba.so
  17 cat > liba.c << EOI
  18 extern int b();
  19 int a() { return b(); }
  20 EOI
  21
  22 # build
  23 compile_lib -o liba.so liba.c
  24
  25
  26 # create libb.so
  27 cat > libb.c << EOI
  28 int b() { return 2; }
  29 EOI
  30
  31 # build
  32 compile_lib -o libb.so libb.c
  33
  34
  35 # create program
  36 cat > program.c << EOI
  37 #include <dlfcn.h>
  38 #include <stdio.h>
  39 #include <stdlib.h>
  40
  41 int b() { return 1; }
  42
  43 int
  44 main()
  45 {
  46         void* liba;
  47         void* libb;
  48         int (*a)();
  49
  50         libb = dlopen("./libb.so", RTLD_NOW | RTLD_GLOBAL);
  51         if (libb == NULL) {
  52                 fprintf(stderr, "Error opening libb.so: %s\n", dlerror());
  53                 exit(117);
  54         }
  55
  56         liba = dlopen("./liba.so", RTLD_NOW | RTLD_GLOBAL);
  57         if (liba == NULL) {
  58                 fprintf(stderr, "Error opening liba.so: %s\n", dlerror());
  59                 exit(117);
  60         }
  61
  62         a = (int (*)())dlsym(liba, "a");
  63         if (a == NULL) {
  64                 fprintf(stderr, "Error getting symbol a: %s\n", dlerror());
  65                 exit(116);
  66         }
  67
  68         return a();
  69 }
  70 EOI
  71
  72 # build
  73 compile_lib_dl -o program program.c
  74
  75 # run
  76 test_run_ok ./program 1
  77