unit-tests/test-cases/dlclose-terminator-dlclose/foo.c

   1 /*
   2  * Copyright (c) 2007 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 #include <stddef.h>
  24 #include <dlfcn.h>
  25
  26
  27 // <rdar://problem/5366233> Leopard (9a499): dyld crash with recursive calls to dlclose()
  28
  29 static void* handle = NULL;
  30
  31 static void __attribute__((constructor)) myinit()
  32 {
  33         handle = dlopen("libbar.dylib", RTLD_LAZY);
  34 }
  35
  36 static void __attribute__((destructor)) myterm()
  37 {
  38         // myterm() is called within dlclose.
  39         // now call dlclose() on another (chainded dylib) to test dlclose is re-entrant
  40         if ( handle != NULL )
  41                 dlclose(handle);
  42 }
  43
  44
  45 int foo()
  46 {
  47         return 10;
  48 }