unit-tests/test-cases/dyld_is_memory_immutable/main.c

   1 /*
   2  * Copyright (c) 2015 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-o/dyld_priv.h>
  28
  29 #include "test.h" // PASS(), FAIL(), XPASS(), XFAIL()
  30
  31 extern uint32_t _cpu_capabilities;
  32
  33 extern const char* foo();
  34
  35 typedef const char* (*BarProc)(void);
  36
  37 const char* myStr = "myStr";
  38
  39 int myInt;
  40
  41 int main()
  42 {
  43     if ( !_dyld_is_memory_immutable(myStr, 6) ) {
  44                 FAIL("_dyld_is_memory_immutable() returned false for string in main executable");
  45         return EXIT_SUCCESS;
  46     }
  47
  48     if ( _dyld_is_memory_immutable(strdup("hello"), 6) ) {
  49                 FAIL("_dyld_is_memory_immutable() returned true for result from strdup()");
  50         return EXIT_SUCCESS;
  51     }
  52
  53     if ( _dyld_is_memory_immutable(&myInt, 4) ) {
  54                 FAIL("_dyld_is_memory_immutable() returned true for global variabe in main executable");
  55         return EXIT_SUCCESS;
  56     }
  57
  58     if ( !_dyld_is_memory_immutable(foo(), 4) ) {
  59                 FAIL("_dyld_is_memory_immutable() returned false for string in statically linked dylib");
  60         return EXIT_SUCCESS;
  61     }
  62
  63     if ( !_dyld_is_memory_immutable(&strcpy, 4) ) {
  64                 FAIL("_dyld_is_memory_immutable() returned false for function in dyld shared cache");
  65         return EXIT_SUCCESS;
  66     }
  67
  68     if ( _dyld_is_memory_immutable(&_cpu_capabilities, 4) ) {
  69                 FAIL("_dyld_is_memory_immutable() returned true for global variabe in shared cache");
  70         return EXIT_SUCCESS;
  71     }
  72
  73     void* handle = dlopen("libbar.dylib", 0);
  74     if ( handle == NULL ) {
  75                 FAIL("dlopen(libbar.dylib) failed");
  76         return EXIT_SUCCESS;
  77     }
  78
  79     BarProc proc = dlsym(handle, "bar");
  80     if ( proc == NULL ) {
  81                 FAIL("dlsym(bar) failed");
  82         return EXIT_SUCCESS;
  83     }
  84     const char* barStr = (*proc)();
  85     if ( _dyld_is_memory_immutable(barStr, 4) ) {
  86                 FAIL("_dyld_is_memory_immutable() returned true for string in unloadable dylib");
  87         return EXIT_SUCCESS;
  88     }
  89
  90
  91         PASS("_dyld_is_memory_immutable");
  92         return 0;
  93 }