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 
main()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 }