rosapps/tests/map_dup_inherit/map_dup_inherit.c

   1 #include <stdio.h>
   2 #include <windows.h>
   3 #include <stdlib.h>
   4 #include <string.h>
   5
   6 /* This tests the ability of the target win32 to create an anonymous file
   7  * mapping, create a mapping view with MapViewOfFile, and then realize the
   8  * pages with VirtualAlloc.
   9  */
  10
  11 int main( int argc, char **argv ) {
  12   HANDLE file_view;
  13   void *file_map;
  14   int *x;
  15
  16   fprintf( stderr, "%lu: Starting\n", GetCurrentProcessId() );
  17
  18   if( argc == 2 ) {
  19     file_map = (void *)atoi(argv[1]);
  20   } else {
  21     file_map = CreateFileMapping( INVALID_HANDLE_VALUE,
  22                                   NULL,
  23                                   PAGE_READWRITE | SEC_RESERVE,
  24                                   0, 0x1000, NULL );
  25     if( !SetHandleInformation( file_map,
  26                                HANDLE_FLAG_INHERIT,
  27                                HANDLE_FLAG_INHERIT ) ) {
  28       fprintf( stderr, "%lu: Could not make handle inheritable.\n",
  29                GetCurrentProcessId() );
  30       return 100;
  31     }
  32   }
  33
  34   if( !file_map ) {
  35     fprintf( stderr, "%lu: Could not create anonymous file map.\n",
  36              GetCurrentProcessId() );
  37     return 1;
  38   }
  39
  40   file_view = MapViewOfFile( file_map,
  41                              FILE_MAP_WRITE,
  42                              0,
  43                              0,
  44                              0x1000 );
  45
  46   if( !file_view ) {
  47     fprintf( stderr, "%lu: Could not map view of file.\n",
  48              GetCurrentProcessId() );
  49     return 2;
  50   }
  51
  52   if( !VirtualAlloc( file_view, 0x1000, MEM_COMMIT, PAGE_READWRITE ) ) {
  53     fprintf( stderr, "%lu: VirtualAlloc failed to realize the page.\n",
  54              GetCurrentProcessId() );
  55     return 3;
  56   }
  57
  58   x = (int *)file_view;
  59   x[0] = 0x12345678;
  60
  61   if( x[0] != 0x12345678 ) {
  62     fprintf( stderr, "%lu: Can't write to the memory (%08x != 0x12345678)\n",
  63              GetCurrentProcessId(), x[0] );
  64     return 4;
  65   }
  66
  67   if( argc == 1 ) {
  68     STARTUPINFO si;
  69     PROCESS_INFORMATION pi;
  70     char cmdline[1000];
  71
  72     memset( &si, 0, sizeof( si ) );
  73     memset( &pi, 0, sizeof( pi ) );
  74
  75     sprintf(cmdline,"%s %d", argv[0], (int)file_map);
  76     if( !CreateProcess(NULL, cmdline, NULL, NULL, TRUE, 0, NULL, NULL,
  77                        &si, &pi ) ) {
  78       fprintf( stderr, "%lu: Could not create child process.\n",
  79                GetCurrentProcessId() );
  80       return 5;
  81     }
  82
  83     if( WaitForSingleObject( pi.hThread, INFINITE ) != WAIT_OBJECT_0 ) {
  84       fprintf( stderr, "%lu: Failed to wait for child process to terminate.\n",
  85                GetCurrentProcessId() );
  86       return 6;
  87     }
  88   }
  89
  90   return 0;
  91 }