unit-tests/test-cases/shared-cache-symlink/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 <stdint.h>
  24 #include <stdio.h>  // fprintf(), NULL
  25 #include <stdlib.h> // exit(), EXIT_SUCCESS
  26 #include <string.h>
  27 #include <dlfcn.h>
  28 #include <mach-o/dyld.h>
  29
  30 #include "test.h" // PASS(), FAIL(), XPASS(), XFAIL()
  31
  32 // libz.1.dylib should be in the shared cache
  33 // libz.dylib is a symlink to libz.dylib
  34 // we want to verify that dlopening the symlink name will use the one in the shared cache
  35
  36
  37 int main()
  38 {
  39         void* libzHandle = dlopen("/usr/lib/libz.dylib", RTLD_LAZY);
  40         if ( libzHandle == NULL ) {
  41                 FAIL("shared-cache-symlink: dlopen(/usr/lib/libz.dylib, RTLD_LAZY) failed: %s", dlerror());
  42                 return EXIT_SUCCESS;
  43         }
  44
  45         // get address of strcmp()
  46         void* sym = dlsym(libzHandle, "inflate");
  47         if ( sym == NULL ) {
  48                 FAIL("shared-cache-symlink: dlsym(handle, \"inflate\") failed");
  49                 return EXIT_SUCCESS;
  50         }
  51
  52         Dl_info info;
  53         if ( dladdr(sym, &info) == 0 ) {
  54                 FAIL("shared-cache-symlink: dladdr(sym, xx) failed");
  55                 return EXIT_SUCCESS;
  56         }
  57
  58         const struct mach_header* mh = (struct mach_header*)info.dli_fbase;
  59         if ( mh->flags & 0x80000000 )
  60                 PASS("shared-cache-symlink");
  61         else
  62                 FAIL("shared-cache-symlink: libz.dylib not loaded from shared cache");
  63
  64         return EXIT_SUCCESS;
  65 }