unit-tests/test-cases/dlsym-RTLD_DEFAULT/foo.c

   1 /*
   2  * Copyright (c) 2005 Apple Computer, 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 <string.h>
  24 #include <dlfcn.h>
  25 #include <stdlib.h> // exit(), EXIT_SUCCESS
  26
  27 #include "test.h" // PASS(), FAIL(), XPASS(), XFAIL()
  28
  29 char* strdup(const char* str)
  30 {
  31         return "from foo";
  32 }
  33
  34 typedef char* (*strdupProc)(const char* str);
  35
  36
  37 void myinit() __attribute__((constructor));
  38 void myinit()
  39 {
  40         strdupProc sym = (strdupProc)dlsym(RTLD_DEFAULT, "strdup");
  41         if ( sym == NULL ) {
  42                 FAIL("dlsym(RTLD_DEFAULT, \"strdup\") failed");
  43                 exit(0);
  44         }
  45
  46         const char* result = (*sym)("hello");
  47         if ( strcmp(result, "from main") != 0 ) {
  48                 FAIL("dlsym(RTLD_DEFAULT, \"strdup\") returned wrong strdup: %s", result);
  49                 exit(0);
  50         }
  51
  52 }