src/tests/system/runtime_loader/test_suite/dlopen_lookup_order1

   1 #!/bin/sh
   2
   3 # program
   4 #
   5 # dlopen():
   6 # liba.so
   7 # libb.so
   8 # <- libb_dependency.so
   9 #
  10 # Expected: Global lookup: symbol in liba.so supersedes symbol in
  11 # libb_dependency.so.
  12
  13
  14 . ./test_setup
  15
  16
  17 # create liba.so
  18 cat > liba.c << EOI
  19 int a() { return 1; }
  20 EOI
  21
  22 # build
  23 compile_lib -o liba.so liba.c
  24
  25
  26 # create libb_dependency.so
  27 cat > libb_dependency.c << EOI
  28 int a() { return 2; }
  29 EOI
  30
  31 # build
  32 compile_lib -o libb_dependency.so libb_dependency.c
  33
  34
  35 # create libb.so
  36 cat > libb.c << EOI
  37 int b() { return 1; }
  38 EOI
  39
  40 # build
  41 compile_lib -o libb.so libb.c ./libb_dependency.so
  42
  43
  44 # create program
  45 cat > program.c << EOI
  46 #include <dlfcn.h>
  47 #include <stdio.h>
  48 #include <stdlib.h>
  49 int
  50 main()
  51 {
  52         void* liba;
  53         void* libb;
  54         void* self;
  55         int (*a)();
  56
  57         liba = dlopen("./liba.so", RTLD_NOW | RTLD_GLOBAL);
  58         if (liba == NULL) {
  59                 fprintf(stderr, "Error opening liba.so: %s\n", dlerror());
  60                 exit(117);
  61         }
  62
  63         libb = dlopen("./libb.so", RTLD_NOW | RTLD_GLOBAL);
  64         if (libb == NULL) {
  65                 fprintf(stderr, "Error opening libb.so: %s\n", dlerror());
  66                 exit(117);
  67         }
  68
  69         self = dlopen(NULL, RTLD_NOW | RTLD_GLOBAL);
  70         if (self == NULL) {
  71                 fprintf(stderr, "Error opening self: %s\n", dlerror());
  72                 exit(117);
  73         }
  74
  75         a = (int (*)())dlsym(self, "a");
  76         if (a == NULL) {
  77                 fprintf(stderr, "Error getting symbol a: %s\n", dlerror());
  78                 exit(116);
  79         }
  80
  81         return a();
  82 }
  83 EOI
  84
  85 # build
  86 compile_program_dl -o program program.c
  87
  88 # run
  89 test_run_ok ./program 1
  90