dyld/unit-tests/test-cases/dyld-func-lookup/foo.c

   1 /*
   2  * Copyright (c) 2005-2009 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24 #include <stdbool.h>
  25 #include <Availability.h>
  26
  27
  28 // _dyld_func_lookup is only available in 10.5 and earlier
  29 #if defined(__MAC_OS_X_VERSION_MIN_REQUIRED) && (__MAC_OS_X_VERSION_MIN_REQUIRED <= __MAC_10_5)
  30
  31 extern bool _dyld_func_lookup(const char* dyld_func_name, void** address);
  32
  33
  34
  35 bool check_dyld_func_lookup()
  36 {
  37         void* address;
  38
  39         // dlopen does not exist, something is wrong
  40         if ( ! _dyld_func_lookup("__dyld_dlopen", &address) )
  41                 return false;
  42
  43         // if a garbage string returns true, something is wrong
  44         if ( _dyld_func_lookup("blablah", &address) )
  45                 return false;
  46
  47         // looks good
  48         return true;
  49 }
  50
  51 #endif