service_runtime/nacl_ldt_unittest.c

   1 /*
   2  * Copyright 2008, Google Inc.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are
   7  * met:
   8  *
   9  *     * Redistributions of source code must retain the above copyright
  10  * notice, this list of conditions and the following disclaimer.
  11  *     * Redistributions in binary form must reproduce the above
  12  * copyright notice, this list of conditions and the following disclaimer
  13  * in the documentation and/or other materials provided with the
  14  * distribution.
  15  *     * Neither the name of Google Inc. nor the names of its
  16  * contributors may be used to endorse or promote products derived from
  17  * this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  20  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  21  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  22  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  23  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  24  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  25  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  29  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 /*
  33  * Test code for NaCl local descriptor table (LDT) managment
  34  */
  35 #include <stdio.h>
  36 #include "native_client/service_runtime/nacl_ldt.h"
  37
  38 #if defined (HAVE_SDL)
  39 #include <SDL.h>
  40 #endif
  41
  42 int main(int argc, char* argv[]) {
  43   uint16_t a, b, c, d, e;
  44   /* Initialize LDT services. */
  45   NaClLdtInit();
  46
  47   /* Data, not read only */
  48   a = NaClLdtAllocatePageSelector(NACL_LDT_DESCRIPTOR_DATA, 0, 0, 0x000ff);
  49   printf("a = %0x\n", a);
  50   NaClLdtPrintSelector(a);
  51
  52   /* Data, read only */
  53   b = NaClLdtAllocatePageSelector(NACL_LDT_DESCRIPTOR_DATA, 1, 0, 0x000ff);
  54   printf("b = %0x\n", b);
  55   NaClLdtPrintSelector(b);
  56
  57   /* Data, read only */
  58   c = NaClLdtAllocatePageSelector(NACL_LDT_DESCRIPTOR_DATA, 1, 0, 0x000ff);
  59   printf("c = %0x\n", c);
  60   NaClLdtPrintSelector(c);
  61
  62   /* Delete b */
  63   NaClLdtDeleteSelector(b);
  64   printf("b (after deletion) = %0x\n", b);
  65   NaClLdtPrintSelector(b);
  66
  67   /* Since there is only one thread, d should grab slot previously holding b */
  68   d = NaClLdtAllocatePageSelector(NACL_LDT_DESCRIPTOR_DATA, 1, 0, 0x000ff);
  69   printf("d = %0x\n", d);
  70   NaClLdtPrintSelector(d);
  71
  72   /* Code selector */
  73   e = NaClLdtAllocatePageSelector(NACL_LDT_DESCRIPTOR_CODE, 1, 0, 0x000ff);
  74   printf("e (code) = %0x\n", e);
  75   NaClLdtPrintSelector(e);
  76
  77   /* Shut down LDT services. */
  78   NaClLdtFini();
  79   return 0;
  80 }