unit-tests/test-cases/image-slide/main.c

   1 /*
   2  * Copyright (c) 2008 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 <stdlib.h> // EXIT_SUCCESS
  24 #include <mach-o/dyld.h>
  25 #include <mach-o/dyld_priv.h>
  26 #include <dlfcn.h>
  27
  28 #include "test.h"
  29
  30 extern void foo();
  31
  32 intptr_t findSlide(const struct mach_header* mh)
  33 {
  34         int count = _dyld_image_count();
  35         for(int i=0; i < count; ++i) {
  36                 if ( mh == _dyld_get_image_header(i) ) {
  37                         return _dyld_get_image_vmaddr_slide(i);
  38                 }
  39         }
  40         return -1;
  41 }
  42
  43
  44 int
  45 main()
  46 {
  47         // find mach_header for libfoo.dylib
  48         const struct mach_header* mh;
  49         Dl_info info;
  50         if ( dladdr(&foo, &info) ) {
  51                 mh = info.dli_fbase;
  52         }
  53         else {
  54                 FAIL("dladdr() could not find foo()");
  55                 exit(0);
  56         }
  57
  58
  59         intptr_t slide1 = _dyld_get_image_slide(mh);
  60         intptr_t slide2 = findSlide(mh);
  61         if ( slide1 == slide2 )
  62                 PASS("image-slide");
  63         else
  64                 FAIL("image-slide: 0x%lX != 0x%lX", slide1, slide2);
  65
  66         return EXIT_SUCCESS;
  67 }
  68
  69