reactos/apps/tests/map_dup_inherit/map_dup_inherit.c

   1 #include <stdio.h>
   2 #include <windows.h>
   3
   4 /* This tests the ability of the target win32 to create an anonymous file
   5  * mapping, create a mapping view with MapViewOfFile, and then realize the
   6  * pages with VirtualAlloc.
   7  */
   8
   9 int main( int argc, char **argv ) {
  10   HANDLE file_view;
  11   void *file_map;
  12   int *x;
  13
  14   fprintf( stderr, "%d: Starting\n", GetCurrentProcessId() );
  15
  16   if( argc == 2 ) {
  17     file_map = atoi(argv[1]);
  18   } else {
  19     file_map = CreateFileMapping( INVALID_HANDLE_VALUE,
  20                                   NULL,
  21                                   PAGE_READWRITE | SEC_RESERVE,
  22                                   0, 0x1000, NULL );
  23     if( !SetHandleInformation( file_map,
  24                                HANDLE_FLAG_INHERIT,
  25                                HANDLE_FLAG_INHERIT ) ) {
  26       fprintf( stderr, "%d: Could not make handle inheritable.\n",
  27                GetCurrentProcessId() );
  28       return 100;
  29     }
  30   }
  31
  32   if( !file_map ) {
  33     fprintf( stderr, "%d: Could not create anonymous file map.\n",
  34              GetCurrentProcessId() );
  35     return 1;
  36   }
  37
  38   file_view = MapViewOfFile( file_map,
  39                              FILE_MAP_WRITE,
  40                              0,
  41                              0,
  42                              0x1000 );
  43
  44   if( !file_view ) {
  45     fprintf( stderr, "%d: Could not map view of file.\n",
  46              GetCurrentProcessId() );
  47     return 2;
  48   }
  49
  50   if( !VirtualAlloc( file_view, 0x1000, MEM_COMMIT, PAGE_READWRITE ) ) {
  51     fprintf( stderr, "%d: VirtualAlloc failed to realize the page.\n",
  52              GetCurrentProcessId() );
  53     return 3;
  54   }
  55
  56   x = (int *)file_view;
  57   x[0] = 0x12345678;
  58
  59   if( x[0] != 0x12345678 ) {
  60     fprintf( stderr, "%d: Can't write to the memory (%08x != 0x12345678)\n",
  61              GetCurrentProcessId() );
  62     return 4;
  63   }
  64
  65   if( argc == 1 ) {
  66     STARTUPINFO si;
  67     PROCESS_INFORMATION pi;
  68     char cmdline[1000];
  69
  70     memset( &si, 0, sizeof( si ) );
  71     memset( &pi, 0, sizeof( pi ) );
  72
  73     sprintf(cmdline,"%s %d", argv[0], (int)file_map);
  74     if( !CreateProcess(NULL, cmdline, NULL, NULL, TRUE, 0, NULL, NULL,
  75                        &si, &pi ) ) {
  76       fprintf( stderr, "%d: Could not create child process.\n",
  77                GetCurrentProcessId() );
  78       return 5;
  79     }
  80
  81     if( WaitForSingleObject( pi.hThread, INFINITE ) != WAIT_OBJECT_0 ) {
  82       fprintf( stderr, "%d: Failed to wait for child process to terminate.\n",
  83                GetCurrentProcessId() );
  84       return 6;
  85     }
  86   }
  87
  88   return 0;
  89 }