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      1 // Copyright (c) 2013 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 }