third_party/android_crazy_linker/src/tests/zoo.cpp

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include <dlfcn.h>
   6 #include <stdio.h>
   7
   8 extern "C" bool Zoo() {
   9   printf("%s: Entering\n", __FUNCTION__);
  10   void* bar_lib = dlopen("libbar.so", RTLD_NOW);
  11   if (!bar_lib) {
  12     fprintf(stderr, "Could not libbar.so: %s\n", dlerror());
  13     return false;
  14   }
  15   printf("%s: Opened libbar.so @%p\n", __FUNCTION__, bar_lib);
  16
  17   void (*bar_func)();
  18
  19   bar_func = reinterpret_cast<void (*)()>(dlsym(bar_lib, "Bar"));
  20   if (!bar_func) {
  21     fprintf(stderr, "Could not find 'Bar' symbol in libbar.so\n");
  22     return false;
  23   }
  24   printf("%s: Found 'Bar' symbol at @%p\n", __FUNCTION__, bar_func);
  25
  26   // Call it.
  27   printf("%s: Calling Bar()\n", __FUNCTION__);
  28   (*bar_func)();
  29
  30   printf("%s: Closing libbar.so\n", __FUNCTION__);
  31   dlclose(bar_lib);
  32
  33   printf("%s: Exiting\n", __FUNCTION__);
  34   return true;
  35 }