testing/test-cases/_dyld_is_memory_immutable.dtest/main.c

   1
   2 // BUILD:  $CC foo.c -dynamiclib  -install_name $RUN_DIR/libfoo.dylib -o $BUILD_DIR/libfoo.dylib
   3 // BUILD:  $CC bar.c -dynamiclib  -install_name $RUN_DIR/libbar.dylib -o $BUILD_DIR/libbar.dylib
   4 // BUILD:  $CC main.c -DRUN_DIR="$RUN_DIR" $BUILD_DIR/libfoo.dylib    -o $BUILD_DIR/dyld_immutable_test.exe
   5
   6 // RUN:  ./dyld_immutable_test.exe
   7
   8 #include <stdio.h>
   9 #include <stdlib.h>
  10 #include <dlfcn.h>
  11 #include <string.h>
  12 #include <mach-o/dyld.h>
  13 #include <mach-o/dyld_priv.h>
  14
  15 #if __has_feature(ptrauth_calls)
  16     #include <ptrauth.h>
  17 #endif
  18
  19 static const void* stripPointer(const void* ptr)
  20 {
  21 #if __has_feature(ptrauth_calls)
  22     return __builtin_ptrauth_strip(ptr, ptrauth_key_asia);
  23 #else
  24     return ptr;
  25 #endif
  26 }
  27
  28
  29 typedef const char* (*BarProc)(void);
  30
  31 extern uint32_t _cpu_capabilities;
  32 extern const char* foo();
  33
  34 const char* myStr = "myStr";
  35
  36 int myInt;
  37
  38
  39 int main()
  40 {
  41     printf("[BEGIN] _dyld_is_memory_immutable\n");
  42
  43     if ( !_dyld_is_memory_immutable(myStr, 6) ) {
  44                 printf("[FAIL] _dyld_is_memory_immutable() returned false for string in main executable\n");
  45         return 0;
  46     }
  47
  48     if ( _dyld_is_memory_immutable(strdup("hello"), 6) ) {
  49                 printf("[FAIL] _dyld_is_memory_immutable() returned true for result from strdup()\n");
  50         return 0;
  51     }
  52
  53     if ( _dyld_is_memory_immutable(&myInt, 4) ) {
  54                 printf("[FAIL] _dyld_is_memory_immutable() returned true for global variabe in main executable\n");
  55         return 0;
  56     }
  57
  58     if ( !_dyld_is_memory_immutable(foo(), 4) ) {
  59                 printf("[FAIL] _dyld_is_memory_immutable() returned false for string in statically linked dylib\n");
  60         return 0;
  61     }
  62
  63     if ( !_dyld_is_memory_immutable(stripPointer((void*)&strcpy), 4) ) {
  64                 printf("[FAIL] _dyld_is_memory_immutable() returned false for strcpy function in dyld shared cache\n");
  65         return 0;
  66     }
  67
  68     if ( _dyld_is_memory_immutable(&_cpu_capabilities, 4) ) {
  69                 printf("[FAIL] _dyld_is_memory_immutable() returned true for global variable in shared cache\n");
  70         return 0;
  71     }
  72
  73         void* handle = dlopen(RUN_DIR "/libbar.dylib", RTLD_FIRST);
  74     if ( handle == NULL ) {
  75                 printf("[FAIL] dlopen(libbar.dylib) failed");
  76         return 0;
  77     }
  78
  79     BarProc proc = dlsym(handle, "bar");
  80     if ( proc == NULL ) {
  81                 printf("[FAIL] dlsym(bar) failed\n");
  82         return 0;
  83     }
  84     const char* barStr = (*proc)();
  85     if ( _dyld_is_memory_immutable(barStr, 4) ) {
  86                 printf("[FAIL] _dyld_is_memory_immutable() returned true for string in unloadable dylib\n");
  87         return 0;
  88     }
  89
  90
  91     printf("[PASS] _dyld_is_memory_immutable\n");
  92     return 0;
  93 }
  94