C++ (Cpp) Page_entry_matches Exemples

Exemple #1

Fichier : memory.c Projet : crackleware/ocamlcc

int caml_page_table_lookup(void * addr)
{
  uintnat h, e;

  h = Hash(Page(addr));
  /* The first hit is almost always successful, so optimize for this case */
  e = caml_page_table.entries[h];
  if (Page_entry_matches(e, (uintnat)addr)) return e & 0xFF;
  while(1) {
    if (e == 0) return 0;
    h = (h + 1) & caml_page_table.mask;
    e = caml_page_table.entries[h];
    if (Page_entry_matches(e, (uintnat)addr)) return e & 0xFF;
  }
}

Exemple #2

Fichier : memory.c Projet : crackleware/ocamlcc

static int caml_page_table_modify(uintnat page, int toclear, int toset)
{
  uintnat h;

  Assert ((page & ~Page_mask) == 0);

  /* Resize to keep load factor below 1/2 */
  if (caml_page_table.occupancy * 2 >= caml_page_table.size) {
    if (caml_page_table_resize() != 0) return -1;
  }
  h = Hash(Page(page));
  while (1) {
    if (caml_page_table.entries[h] == 0) {
      caml_page_table.entries[h] = page | toset;
      caml_page_table.occupancy++;
      break;
    }
    if (Page_entry_matches(caml_page_table.entries[h], page)) {
      caml_page_table.entries[h] =
        (caml_page_table.entries[h] & ~toclear) | toset;
      break;
    }
    h = (h + 1) & caml_page_table.mask;
  }
  return 0;
}

Exemple #3

Fichier : memory.c Projet : d5nguyenvan/mirage

static int caml_page_table_modify(uintnat page, int toclear, int toset)
{
  uintnat h;

  Assert ((page & ~Page_mask) == 0);

#ifdef USE_STATIC_VMEM
  /* All pages above HYPERVISOR_VIRT_END are part of the OCaml heap */
  if (page >= HYPERVISOR_VIRT_END)
    return 0;
#if 0
  else
    printf("modify: %p %d %d\n", page, toclear, toset);
#endif
#endif
  /* Resize to keep load factor below 1/2 */
  if (caml_page_table.occupancy * 2 >= caml_page_table.size) {
    if (caml_page_table_resize() != 0) return -1;
  }
  h = Hash(Page(page));
  while (1) {
    if (caml_page_table.entries[h] == 0) {
      caml_page_table.entries[h] = page | toset;
      caml_page_table.occupancy++;
      break;
    }
    if (Page_entry_matches(caml_page_table.entries[h], page)) {
      caml_page_table.entries[h] =
        (caml_page_table.entries[h] & ~toclear) | toset;
      break;
    }
    h = (h + 1) & caml_page_table.mask;
  }
  return 0;
}

Exemple #4

Fichier : memory.c Projet : crotsos/mirage

int caml_page_table_lookup(void * addr)
{
#ifdef USE_STATIC_VMEM
  if (addr >= (void *)MAJOR_HEAP_BASE)
    return In_heap;
  else if (addr >= (void *)MINOR_HEAP_BASE)
    return In_young;
  else if ((unsigned long)addr >= mlstart && (unsigned long)addr < mlend)
    return In_static_data;
#endif
  uintnat h, e;

  h = Hash(Page(addr));
  /* The first hit is almost always successful, so optimize for this case */
  e = caml_page_table.entries[h];
  if (Page_entry_matches(e, (uintnat)addr)) return e & 0xFF;
  while(1) {
    if (e == 0) return 0;
    h = (h + 1) & caml_page_table.mask;
    e = caml_page_table.entries[h];
    if (Page_entry_matches(e, (uintnat)addr)) return e & 0xFF;
  }
}

Exemple #5

Fichier : memory.c Projet : d5nguyenvan/mirage

int caml_page_table_lookup(void * addr)
{
#ifdef USE_STATIC_VMEM
  if (addr >= HYPERVISOR_VIRT_END)
    return In_heap;
  if ((unsigned long)addr >= mlstart && (unsigned long)addr < mlend)
    return In_static_data;
  /* XXX need minor heap area also. In_code area is mapped to In_static_data. */
  return 0;
#else
  uintnat h, e;

  h = Hash(Page(addr));
  /* The first hit is almost always successful, so optimize for this case */
  e = caml_page_table.entries[h];
  if (Page_entry_matches(e, (uintnat)addr)) return e & 0xFF;
  while(1) {
    if (e == 0) return 0;
    h = (h + 1) & caml_page_table.mask;
    e = caml_page_table.entries[h];
    if (Page_entry_matches(e, (uintnat)addr)) return e & 0xFF;
  }
#endif
}