testing/test-cases/read-only-data.dtest/foo.c

   1 #include <stdio.h>
   2 #include <string.h>
   3 #include <stdbool.h>
   4 #include <stdlib.h>
   5 #include <mach/mach.h>
   6 #include <mach/vm_region.h>
   7 #include <dlfcn.h>
   8
   9 const void* const funcs[] = { &malloc, &free, &strcmp, &printf };
  10
  11 bool isReadOnly(const void* addr)
  12 {
  13     mach_port_t                     objName;
  14     vm_address_t                    testAddr = (vm_address_t)addr;
  15     vm_size_t                       regionSize;
  16     vm_region_basic_info_data_64_t  info;
  17     mach_msg_type_number_t          len = VM_REGION_BASIC_INFO_COUNT_64;
  18     kern_return_t err = vm_region_64(mach_task_self(), &testAddr, &regionSize, VM_REGION_BASIC_INFO_64, (vm_region_info_t)&info, &len, &objName);
  19
  20     if ( err == 0 ) {
  21         if ( info.protection & VM_PROT_WRITE )
  22             return false;
  23         return true;
  24     }
  25     return false;
  26 }
  27
  28
  29
  30 #if BUNDLE
  31 bool testBundle()
  32 {
  33     return isReadOnly(&funcs[1]);
  34 }
  35 #else
  36 bool testLib()
  37 {
  38     return isReadOnly(&funcs[1]);
  39 }
  40 #endif
  41