third_party/android_crazy_linker/src/tests/test_dl_wrappers.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 // A crazy linker test to:
   6 // - Load a library (libzoo.so) with the linker.
   7 // - Find the address of the "Zoo" function in libzoo.so.
   8 // - Call the Zoo() function, which will use dlopen() / dlsym() to
   9 //   find libbar.so (which depends on libfoo.so).
  10 // - Close the library.
  11
  12 // This tests the dlopen/dlsym/dlclose wrappers provided by the crazy
  13 // linker to loaded libraries.
  14
  15 #include <stdio.h>
  16 #include <crazy_linker.h>
  17
  18 #include "test_util.h"
  19
  20 typedef bool (*FunctionPtr)();
  21
  22 int main() {
  23   crazy_context_t* context = crazy_context_create();
  24   crazy_library_t* library;
  25
  26   // Load libzoo.so
  27   if (!crazy_library_open(&library, "libzoo.so", context)) {
  28     Panic("Could not open library: %s\n", crazy_context_get_error(context));
  29   }
  30
  31   // Find the "Zoo" symbol.
  32   FunctionPtr zoo_func;
  33   if (!crazy_library_find_symbol(
  34            library, "Zoo", reinterpret_cast<void**>(&zoo_func))) {
  35     Panic("Could not find 'Zoo' in libzoo.so\n");
  36   }
  37
  38   // Call it.
  39   bool ret = (*zoo_func)();
  40   if (!ret)
  41     Panic("'Zoo' function failed!");
  42
  43   // Close the library.
  44   printf("Closing libzoo.so\n");
  45   crazy_library_close(library);
  46
  47   crazy_context_destroy(context);
  48
  49   return 0;
  50 }