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 /*
  17  * $Header$
  18  */
  19
  20 #include <stdio.h>
  21 #include "runtime.h"
  22 #include "os.h"
  23 #include "globals.h"
  24 #include "sbcl.h"
  25 #include "validate.h"
  26
  27 static void ensure_space(lispobj *start, unsigned long size)
  28 {
  29     if (os_validate((os_vm_address_t)start,(os_vm_size_t)size)==NULL) {
  30         fprintf(stderr,
  31                 "ensure_space: failed to validate %ld bytes at 0x%08X\n",
  32                 size,
  33                 (unsigned long)start);
  34         exit(1);
  35     }
  36 }
  37
  38 #ifdef HOLES
  39
  40 static os_vm_address_t holes[] = HOLES;
  41
  42 static void make_holes(void)
  43 {
  44     int i;
  45
  46     for (i = 0; i < sizeof(holes)/sizeof(holes[0]); i++) {
  47         if (os_validate(holes[i], HOLE_SIZE) == NULL) {
  48             fprintf(stderr,
  49                     "make_holes: failed to validate %ld bytes at 0x%08X\n",
  50                     HOLE_SIZE,
  51                     (unsigned long)holes[i]);
  52             exit(1);
  53         }
  54         os_protect(holes[i], HOLE_SIZE, 0);
  55     }
  56 }
  57 #endif
  58
  59 void validate(void)
  60 {
  61 #ifdef PRINTNOISE
  62         printf("validating memory ...");
  63         fflush(stdout);
  64 #endif
  65
  66         ensure_space(READ_ONLY_SPACE_START, READ_ONLY_SPACE_SIZE);
  67
  68         ensure_space(STATIC_SPACE_START, STATIC_SPACE_SIZE);
  69
  70         ensure_space(DYNAMIC_SPACE_START, DYNAMIC_SPACE_SIZE);
  71
  72         control_stack = (lispobj *) CONTROL_STACK_START;
  73 #ifdef __i386__
  74         control_stack_end = (lispobj *) (CONTROL_STACK_START
  75                                          + CONTROL_STACK_SIZE);
  76 #endif
  77         ensure_space(control_stack, CONTROL_STACK_SIZE);
  78
  79         ensure_space(BINDING_STACK_START, BINDING_STACK_SIZE);
  80
  81 #ifdef HOLES
  82         make_holes();
  83 #endif
  84
  85 #ifdef PRINTNOISE
  86         printf(" done.\n");
  87 #endif
  88 }