reactos/rosapps/tests/map_dup_inherit/map_dup_inherit.c

#include <stdio.h>
#include <windows.h>
#include <stdlib.h>
#include <string.h>

/* This tests the ability of the target win32 to create an anonymous file
 * mapping, create a mapping view with MapViewOfFile, and then realize the
 * pages with VirtualAlloc.
 */

int main( int argc, char **argv ) {
  HANDLE file_view;
  void *file_map;
  int *x;

  fprintf( stderr, "%lu: Starting\n", GetCurrentProcessId() );

  if( argc == 2 ) {
    file_map = (void *)atoi(argv[1]);
  } else {
    file_map = CreateFileMapping( INVALID_HANDLE_VALUE,
				  NULL,
				  PAGE_READWRITE | SEC_RESERVE,
				  0, 0x1000, NULL );
    if( !SetHandleInformation( file_map,
			       HANDLE_FLAG_INHERIT,
			       HANDLE_FLAG_INHERIT ) ) {
      fprintf( stderr, "%lu: Could not make handle inheritable.\n",
	       GetCurrentProcessId() );
      return 100;
    }
  }

  if( !file_map ) {
    fprintf( stderr, "%lu: Could not create anonymous file map.\n",
	     GetCurrentProcessId() );
    return 1;
  }

  file_view = MapViewOfFile( file_map,
			     FILE_MAP_WRITE,
			     0,
			     0,
			     0x1000 );

  if( !file_view ) {
    fprintf( stderr, "%lu: Could not map view of file.\n",
	     GetCurrentProcessId() );
    return 2;
  }

  if( !VirtualAlloc( file_view, 0x1000, MEM_COMMIT, PAGE_READWRITE ) ) {
    fprintf( stderr, "%lu: VirtualAlloc failed to realize the page.\n",
	     GetCurrentProcessId() );
    return 3;
  }

  x = (int *)file_view;
  x[0] = 0x12345678;

  if( x[0] != 0x12345678 ) {
    fprintf( stderr, "%lu: Can't write to the memory (%08x != 0x12345678)\n",
	     GetCurrentProcessId(), x[0] );
    return 4;
  }

  if( argc == 1 ) {
    STARTUPINFO si;
    PROCESS_INFORMATION pi;
    char cmdline[1000];

    memset( &si, 0, sizeof( si ) );
    memset( &pi, 0, sizeof( pi ) );

    sprintf(cmdline,"%s %d", argv[0], (int)file_map);
    if( !CreateProcess(NULL, cmdline, NULL, NULL, TRUE, 0, NULL, NULL,
		       &si, &pi ) ) {
      fprintf( stderr, "%lu: Could not create child process.\n",
	       GetCurrentProcessId() );
      return 5;
    }

    if( WaitForSingleObject( pi.hThread, INFINITE ) != WAIT_OBJECT_0 ) {
      fprintf( stderr, "%lu: Failed to wait for child process to terminate.\n",
	       GetCurrentProcessId() );
      return 6;
    }
  }

  return 0;
}