third_party/android_crazy_linker/src/tests/test_load_library_depends.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 (libbar.so) with the linker, which depends on
   7 //   another library (libfoo.so)
   8 // - Find the address of the "Bar" function in libbar.so.
   9 // - Call the Bar() function, which ends up calling Foo() in libfoo.so
  10 // - Close the library.
  11
  12 #include <stdio.h>
  13 #include <crazy_linker.h>
  14
  15 #include "test_util.h"
  16
  17 typedef void (*FunctionPtr)();
  18
  19 int main() {
  20   crazy_context_t* context = crazy_context_create();
  21   crazy_library_t* library;
  22
  23   // DEBUG
  24   crazy_context_set_load_address(context, 0x20000000);
  25
  26   // Load libbar.so
  27   if (!crazy_library_open(&library, "libbar.so", context)) {
  28     Panic("Could not open library: %s\n", crazy_context_get_error(context));
  29   }
  30
  31   // Find the "Bar" symbol.
  32   FunctionPtr bar_func;
  33   if (!crazy_library_find_symbol(
  34            library, "Bar", reinterpret_cast<void**>(&bar_func))) {
  35     Panic("Could not find 'Bar' in libbar.so\n");
  36   }
  37
  38   // Call it.
  39   (*bar_func)();
  40
  41   // Find the "Foo" symbol from libbar.so
  42   FunctionPtr foo_func;
  43   if (!crazy_library_find_symbol(
  44            library, "Foo", reinterpret_cast<void**>(&foo_func))) {
  45     Panic("Could not find 'Foo' from libbar.so\n");
  46   }
  47
  48   // Close the library.
  49   printf("Closing libbar.so\n");
  50   crazy_library_close(library);
  51
  52   crazy_context_destroy(context);
  53
  54   return 0;
  55 }