unit-tests/test-cases/dlclose-unmap/main.c

   1 /*
   2  * Copyright (c) 2005-2009 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 <stdio.h>  // fprintf(), NULL
  24 #include <stdlib.h> // exit(), EXIT_SUCCESS
  25 #include <string.h>
  26 #include <dlfcn.h>
  27 #include <mach/mach.h>
  28
  29 #include "test.h" // PASS(), FAIL(), XPASS(), XFAIL()
  30
  31
  32 ///
  33 /// This tests that dlclose() actually unmmaps the image
  34 ///
  35
  36 static void trySO(const char* path)
  37 {
  38         void* handle = dlopen(path, RTLD_LAZY);
  39         if ( handle == NULL ) {
  40                 const char* msg = dlerror();
  41                 FAIL("dlopen(\"%s\" RTLD_LAZY) failed but it should have worked: %s", path, msg);
  42                 exit(0);
  43         }
  44         void* sym = dlsym(handle, "foo");
  45         if ( sym == NULL ) {
  46                 const char* msg = dlerror();
  47                 FAIL("dlsym(handle, \"foo\") failed but it should have worked: %s", msg);
  48                 exit(0);
  49         }
  50
  51         int result = dlclose(handle);
  52         if ( result != 0 ) {
  53                 FAIL("dlclose(handle) returned %d", result);
  54                 exit(0);
  55         }
  56
  57         // now try to create a page where foo() was
  58         vm_address_t addr = ((uintptr_t)sym) & (-4096);
  59         kern_return_t r = vm_allocate(mach_task_self(), &addr, 4096, VM_FLAGS_FIXED);
  60         if ( r != KERN_SUCCESS )  {
  61                 FAIL("dlclose-unmap: could not allocate page where SO was previously mapped", result);
  62                 exit(0);
  63         }
  64 }
  65
  66
  67 int main()
  68 {
  69         trySO("test.bundle");
  70         trySO("test.dylib");
  71
  72         PASS("dlclose-unmap");
  73         return 0;
  74 }