src/runtime/validate.c

   1 /*
   2  * memory validation
   3  */
   4
   5 /*
   6  * This software is part of the SBCL system. See the README file for
   7  * more information.
   8  *
   9  * This software is derived from the CMU CL system, which was
  10  * written at Carnegie Mellon University and released into the
  11  * public domain. The software is in the public domain and is
  12  * provided with absolutely no warranty. See the COPYING and CREDITS
  13  * files for more information.
  14  */
  15
  16 #include <stdio.h>
  17 #include "runtime.h"
  18 #include "os.h"
  19 #include "globals.h"
  20 #include "sbcl.h"
  21 #include "validate.h"
  22
  23 static void ensure_space(lispobj *start, unsigned long size)
  24 {
  25     if (os_validate((os_vm_address_t)start,(os_vm_size_t)size)==NULL) {
  26         fprintf(stderr,
  27                 "ensure_space: failed to validate %ld bytes at 0x%08X\n",
  28                 size,
  29                 (unsigned long)start);
  30         exit(1);
  31     }
  32 }
  33
  34 #ifdef HOLES
  35
  36 static os_vm_address_t holes[] = HOLES;
  37
  38 static void make_holes(void)
  39 {
  40     int i;
  41
  42     for (i = 0; i < sizeof(holes)/sizeof(holes[0]); i++) {
  43         if (os_validate(holes[i], HOLE_SIZE) == NULL) {
  44             fprintf(stderr,
  45                     "make_holes: failed to validate %ld bytes at 0x%08X\n",
  46                     HOLE_SIZE,
  47                     (unsigned long)holes[i]);
  48             exit(1);
  49         }
  50         os_protect(holes[i], HOLE_SIZE, 0);
  51     }
  52 }
  53 #endif
  54
  55 void validate(void)
  56 {
  57 #ifdef PRINTNOISE
  58         printf("validating memory ...");
  59         fflush(stdout);
  60 #endif
  61
  62         ensure_space(READ_ONLY_SPACE_START, READ_ONLY_SPACE_SIZE);
  63         ensure_space(STATIC_SPACE_START   , STATIC_SPACE_SIZE);
  64         ensure_space(DYNAMIC_SPACE_START  , DYNAMIC_SPACE_SIZE);
  65         ensure_space(CONTROL_STACK_START  , CONTROL_STACK_SIZE);
  66         ensure_space(BINDING_STACK_START  , BINDING_STACK_SIZE);
  67
  68 #ifdef HOLES
  69         make_holes();
  70 #endif
  71
  72 #ifdef PRINTNOISE
  73         printf(" done.\n");
  74 #endif
  75 }