unit-tests/test-cases/dlopen-zero/main.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 <stdio.h>  // fprintf(), NULL
  24 #include <stdlib.h> // exit(), EXIT_SUCCESS
  25 #include <dlfcn.h>
  26
  27 #include "test.h" // PASS(), FAIL(), XPASS(), XFAIL()
  28
  29
  30 int foo()
  31 {
  32         return 42;
  33 }
  34
  35
  36 int main()
  37 {
  38         // passing NULL as path to dlopen() has the special meaning of
  39         // "get handle to main executable"
  40         void* handle = dlopen(NULL, RTLD_LAZY);
  41         if ( handle == NULL ) {
  42                 FAIL("dlopen(NULL, RTLD_LAZY) failed");
  43                 exit(1);
  44         }
  45
  46         // make sure we find "foo" in this main executable
  47         void* sym = dlsym(handle, "foo");
  48         if ( sym == NULL ) {
  49                 FAIL("dlsym(handle, \"foo\") failed");
  50                 exit(1);
  51         }
  52         if ( sym != &foo ) {
  53                 FAIL("dlsym(handle, \"foo\") returned wrong address");
  54                 exit(1);
  55         }
  56
  57         PASS("dlopen-zero");
  58         return EXIT_SUCCESS;
  59 }