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
  24 ensure_space(lispobj *start, unsigned long size)
  25 {
  26     if (os_validate((os_vm_address_t)start,(os_vm_size_t)size)==NULL) {
  27         fprintf(stderr,
  28                 "ensure_space: failed to validate %ld bytes at 0x%08lx\n",
  29                 size,
  30                 (unsigned long)start);
  31         exit(1);
  32     }
  33 }
  34
  35 #ifdef HOLES
  36
  37 static os_vm_address_t holes[] = HOLES;
  38
  39 static void
  40 make_holes(void)
  41 {
  42     int i;
  43
  44     for (i = 0; i < sizeof(holes)/sizeof(holes[0]); i++) {
  45         if (os_validate(holes[i], HOLE_SIZE) == NULL) {
  46             fprintf(stderr,
  47                     "make_holes: failed to validate %ld bytes at 0x%08X\n",
  48                     HOLE_SIZE,
  49                     (unsigned long)holes[i]);
  50             exit(1);
  51         }
  52         os_protect(holes[i], HOLE_SIZE, 0);
  53     }
  54 }
  55 #endif
  56
  57 void
  58 validate(void)
  59 {
  60 #ifdef PRINTNOISE
  61         printf("validating memory ...");
  62         fflush(stdout);
  63 #endif
  64
  65         ensure_space( (lispobj *)READ_ONLY_SPACE_START, READ_ONLY_SPACE_SIZE);
  66         ensure_space( (lispobj *)STATIC_SPACE_START   , STATIC_SPACE_SIZE);
  67 #ifdef GENCGC
  68         ensure_space( (lispobj *)DYNAMIC_SPACE_START  , DYNAMIC_SPACE_SIZE);
  69 #else
  70         ensure_space( (lispobj *)DYNAMIC_0_SPACE_START  , DYNAMIC_SPACE_SIZE);
  71         ensure_space( (lispobj *)DYNAMIC_1_SPACE_START  , DYNAMIC_SPACE_SIZE);
  72 #endif
  73         ensure_space( (lispobj *)CONTROL_STACK_START  , CONTROL_STACK_SIZE);
  74         ensure_space( (lispobj *)BINDING_STACK_START  , BINDING_STACK_SIZE);
  75
  76 #ifdef HOLES
  77         make_holes();
  78 #endif
  79
  80 #ifdef PRINTNOISE
  81         printf(" done.\n");
  82 #endif
  83 }