unit-tests/test-cases/dlopen-RTLD_NODELETE/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 <string.h>
  26 #include <dlfcn.h>
  27
  28 #include "test.h" // PASS(), FAIL(), XPASS(), XFAIL()
  29
  30
  31 ///
  32 /// This tests that RTLD_NODELETE prevents an image from being unloaded
  33 ///
  34
  35 static int trySO(const char* path)
  36 {       // main links against libfoo.dylib so it should already be loaded
  37         void* handle = dlopen(path, RTLD_NODELETE);
  38         if ( handle == NULL ) {
  39                 const char* msg = dlerror();
  40                 FAIL("dlopen(\"%s\" RTLD_NODELETE) failed but it should have worked: %s", path, msg);
  41                 exit(0);
  42         }
  43         void* sym = dlsym(handle, "foo");
  44         if ( sym == NULL ) {
  45                 const char* msg = dlerror();
  46                 FAIL("dlsym(handle, \"foo\") failed but it should have worked: %s", msg);
  47                 exit(0);
  48         }
  49
  50         int result = dlclose(handle);
  51         if ( result != 0 ) {
  52                 if ( result == 1 ) {
  53                         // panther dyld returns 1 if you try to dlclose() a dylib
  54                         XFAIL("dlclose(handle[%s]) returned %d", path, result);
  55                 }
  56                 else {
  57                         FAIL("dlclose(handle) returned %d", result);
  58                         exit(0);
  59                 }
  60         }
  61
  62         // now try to access foo.  If .so was unmapped, this will bus error
  63         return *((int*)sym);
  64 }
  65
  66
  67 int main()
  68 {
  69         trySO("test.bundle");
  70         trySO("test.dylib");
  71
  72         PASS("dlopen-RTLD_NODELETE");
  73         return 0;
  74 }