src/tests/system/runtime_loader/test_suite/dlopen_lookup_next1

   1 #!/bin/sh
   2
   3 # program
   4 #
   5 # dlopen():
   6 # libe.so
   7 # liba.so
   8 # <- libb.so
   9 #    <- libd.so
  10 #
  11 # Expected: dlsym(RTLD_NEXT) finds symbol in order libe.so, liba.so, libb.so,
  12 # libd.so
  13
  14
  15 . ./test_setup
  16
  17
  18 # create libd.so
  19 cat > libd.c << EOI
  20 int a() { return 1; }
  21 EOI
  22
  23 # build
  24 compile_lib -o libd.so libd.c
  25
  26
  27 # create libb.so
  28 cat > libb.c << EOI
  29 #define __USE_GNU
  30 #include <dlfcn.h>
  31 int
  32 a()
  33 {
  34         int (*nextA)();
  35         *(void**)&nextA = dlsym(RTLD_NEXT, "a");
  36         return (nextA != 0 ? nextA() : 0) + 2;
  37 }
  38 EOI
  39
  40 # build
  41 compile_lib_dl -o libb.so libb.c ./libd.so
  42
  43
  44 # create liba.so
  45 cat > liba.c << EOI
  46 #include <dlfcn.h>
  47 int
  48 a()
  49 {
  50         int (*nextA)();
  51         *(void**)&nextA = dlsym(RTLD_NEXT, "a");
  52         return (nextA != 0 ? nextA() : 0) + 4;
  53 }
  54 EOI
  55
  56 # build
  57 compile_lib_dl -o liba.so liba.c ./libb.so
  58
  59
  60 # create libe.so
  61 cat > libe.c << EOI
  62 #include <dlfcn.h>
  63 int
  64 a()
  65 {
  66         int (*nextA)();
  67         *(void**)&nextA = dlsym(RTLD_NEXT, "a");
  68         return (nextA != 0 ? nextA() : 0) + 8;
  69 }
  70 EOI
  71
  72 # build
  73 compile_lib_dl -o libe.so libe.c
  74
  75
  76 # create program
  77 cat > program.c << EOI
  78 #include <dlfcn.h>
  79 #include <stdio.h>
  80 #include <stdlib.h>
  81
  82 int
  83 a()
  84 {
  85         int (*nextA)();
  86         *(void**)&nextA = dlsym(RTLD_NEXT, "a");
  87         return (nextA != 0 ? nextA() : 0) + 16;
  88 }
  89
  90 int
  91 main()
  92 {
  93         void* liba;
  94         void* libe;
  95         void* self;
  96
  97         libe = dlopen("./libe.so", RTLD_NOW | RTLD_GLOBAL);
  98         if (libe == NULL) {
  99                 fprintf(stderr, "Error opening libe.so: %s\n", dlerror());
 100                 exit(117);
 101         }
 102
 103         liba = dlopen("./liba.so", RTLD_NOW | RTLD_GLOBAL);
 104         if (liba == NULL) {
 105                 fprintf(stderr, "Error opening liba.so: %s\n", dlerror());
 106                 exit(117);
 107         }
 108
 109         return a();
 110 }
 111 EOI
 112
 113 # build
 114 compile_program_dl -o program program.c
 115
 116 # run
 117 test_run_ok ./program 31