C++ oop::is_symbol方法代码示例

void symbolTable::switch_pointers(oop from, oop to) {
  if (! from->is_symbol()) return;
  assert(to->is_symbol(),
         "cannot replace a symbol with a non-symbol");

  symbolTableEntry* e;
  FOR_ALL_ENTRIES(e) {
    symbolOop* addr;
    FOR_ALL_SYMBOL_ADDR(e, addr, SWITCH_POINTERS_TEMPLATE(addr));
  }
}

int symbolKlass::oop_adjust_pointers(oop obj) {
  assert(obj->is_symbol(), "should be symbol");
  symbolOop s = symbolOop(obj);
  // Get size before changing pointers.
  // Don't call size() or oop_size() since that is a virtual call.
  int size = s->object_size();
  // Performance tweak: We skip iterating over the klass pointer since we
  // know that Universe::symbolKlassObj never moves.
  return size;
}

int symbolKlass::oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr) {
  assert(obj->is_symbol(), "object must be symbol");
  symbolOop s = symbolOop(obj);
  // Get size before changing pointers.
  // Don't call size() or oop_size() since that is a virtual call.
  int size = s->object_size();
  // Performance tweak: We skip iterating over the klass pointer since we
  // know that Universe::symbolKlassObj never moves.
  return size;
}

PRIM_DECL_2(behaviorPrimitives::methodFor, oop receiver, oop selector) {
  PROLOGUE_2("methodFor", receiver, selector);
  ASSERT_RECEIVER;

  if (!selector->is_symbol())
    return markSymbol(vmSymbols::first_argument_has_wrong_type());

  methodOop m = klassOop(receiver)->klass_part()->lookup(symbolOop(selector));
  if (m) return m;
  return markSymbol(vmSymbols::not_found());
}

object_type ClassifyObjectClosure::classify_object(oop obj, bool count) {
  object_type type = unknown_type;

  Klass* k = obj->blueprint();

  if (k->as_klassOop() == SystemDictionary::Object_klass()) {
    tty->print_cr("Found the class!");
  }

  if (count) {
    k->set_alloc_count(k->alloc_count() + 1);
  }

  if (obj->is_instance()) {
    if (k->oop_is_instanceRef()) {
      type = instanceRef_type;
    } else {
      type = instance_type;
    }
  } else if (obj->is_typeArray()) {
    type = typeArray_type;
  } else if (obj->is_objArray()) {
    type = objArray_type;
  } else if (obj->is_symbol()) {
    type = symbol_type;
  } else if (obj->is_klass()) {
    Klass* k = ((klassOop)obj)->klass_part();
    if (k->oop_is_instance()) {
      type = instanceKlass_type;
    } else {
      type = klass_type;
    }
  } else if (obj->is_method()) {
    type = method_type;
  } else if (obj->is_constMethod()) {
    type = constMethod_type;
  } else if (obj->is_methodData()) {
    ShouldNotReachHere();
  } else if (obj->is_constantPool()) {
    type = constantPool_type;
  } else if (obj->is_constantPoolCache()) {
    type = constantPoolCache_type;
  } else if (obj->is_compiledICHolder()) {
    type = compiledICHolder_type;
  } else {
    ShouldNotReachHere();
  }

  assert(type != unknown_type, "found object of unknown type.");
  return type;
}

void symbolKlass::oop_follow_contents(oop obj) {
  assert (obj->is_symbol(), "object must be symbol");
  // Performance tweak: We skip iterating over the klass pointer since we 
  // know that Universe::symbolKlassObj never moves.
  // Note: do not follow next link here (see SymbolTable::follow_contents)
}

bool symbolKlass::oop_is_parsable(oop obj) const {
  assert(obj->is_symbol(),"must be a symbol");
  symbolOop s = symbolOop(obj);
  return s->object_is_parsable();
}

int symbolKlass::oop_size(oop obj) const { 
  assert(obj->is_symbol(),"must be a symbol");
  symbolOop s = symbolOop(obj);
  int size = s->object_size();
  return size; 
}

void symbolKlass::oop_copy_contents(PSPromotionManager* pm, oop obj) {
  assert(obj->is_symbol(), "should be symbol");
}

int symbolKlass::oop_update_pointers(ParCompactionManager* cm, oop obj,
                                     HeapWord* beg_addr, HeapWord* end_addr) {
  assert(obj->is_symbol(), "should be symbol");
  return symbolOop(obj)->object_size();
}