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hotspot/src/share/vm/oops/objArrayKlass.hpp

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+/*
+ * Copyright 1997-2007 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+// objArrayKlass is the klass for objArrays
+
+class objArrayKlass : public arrayKlass {
+  friend class VMStructs;
+ private:
+  klassOop _element_klass;            // The klass of the elements of this array type
+  klassOop _bottom_klass;             // The one-dimensional type (instanceKlass or typeArrayKlass)
+ public:
+  // Instance variables
+  klassOop element_klass() const      { return _element_klass; }
+  void set_element_klass(klassOop k)  { oop_store_without_check((oop*) &_element_klass, (oop) k); }
+  oop* element_klass_addr()           { return (oop*)&_element_klass; }
+
+  klassOop bottom_klass() const       { return _bottom_klass; }
+  void set_bottom_klass(klassOop k)   { oop_store_without_check((oop*) &_bottom_klass, (oop) k); }
+  oop* bottom_klass_addr()            { return (oop*)&_bottom_klass; }
+
+  // Compiler/Interpreter offset
+  static int element_klass_offset_in_bytes() { return offset_of(objArrayKlass, _element_klass); }
+
+  // Dispatched operation
+  bool can_be_primary_super_slow() const;
+  objArrayOop compute_secondary_supers(int num_extra_slots, TRAPS);
+  bool compute_is_subtype_of(klassOop k);
+  bool oop_is_objArray_slow()  const  { return true; }
+  int oop_size(oop obj) const;
+  int klass_oop_size() const          { return object_size(); }
+
+  // Allocation
+  DEFINE_ALLOCATE_PERMANENT(objArrayKlass);
+  objArrayOop allocate(int length, TRAPS);
+  oop multi_allocate(int rank, jint* sizes, TRAPS);
+
+  // Copying
+  void  copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS);
+
+  // Compute protection domain
+  oop protection_domain() { return Klass::cast(bottom_klass())->protection_domain(); }
+  // Compute class loader
+  oop class_loader() const { return Klass::cast(bottom_klass())->class_loader(); }
+
+ protected:
+  // Returns the objArrayKlass for n'th dimension.
+  virtual klassOop array_klass_impl(bool or_null, int n, TRAPS);
+
+  // Returns the array class with this class as element type.
+  virtual klassOop array_klass_impl(bool or_null, TRAPS);
+
+ public:
+  // Casting from klassOop
+  static objArrayKlass* cast(klassOop k) {
+    assert(k->klass_part()->oop_is_objArray_slow(), "cast to objArrayKlass");
+    return (objArrayKlass*) k->klass_part();
+  }
+
+  // Sizing
+  static int header_size()                { return oopDesc::header_size() + sizeof(objArrayKlass)/HeapWordSize; }
+  int object_size() const                 { return arrayKlass::object_size(header_size()); }
+
+  // Initialization (virtual from Klass)
+  void initialize(TRAPS);
+
+  // Garbage collection
+  void oop_follow_contents(oop obj);
+  int  oop_adjust_pointers(oop obj);
+
+  // Parallel Scavenge and Parallel Old
+  PARALLEL_GC_DECLS
+
+  // Iterators
+  int oop_oop_iterate(oop obj, OopClosure* blk) {
+    return oop_oop_iterate_v(obj, blk);
+  }
+  int oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr) {
+    return oop_oop_iterate_v_m(obj, blk, mr);
+  }
+#define ObjArrayKlass_OOP_OOP_ITERATE_DECL(OopClosureType, nv_suffix)   \
+  int oop_oop_iterate##nv_suffix(oop obj, OopClosureType* blk);         \
+  int oop_oop_iterate##nv_suffix##_m(oop obj, OopClosureType* blk,      \
+                                     MemRegion mr);
+
+  ALL_OOP_OOP_ITERATE_CLOSURES_1(ObjArrayKlass_OOP_OOP_ITERATE_DECL)
+  ALL_OOP_OOP_ITERATE_CLOSURES_3(ObjArrayKlass_OOP_OOP_ITERATE_DECL)
+
+  // JVM support
+  jint compute_modifier_flags(TRAPS) const;
+
+ private:
+   static klassOop array_klass_impl   (objArrayKlassHandle this_oop, bool or_null, int n, TRAPS);
+
+#ifndef PRODUCT
+ public:
+  // Printing
+  void oop_print_on      (oop obj, outputStream* st);
+  void oop_print_value_on(oop obj, outputStream* st);
+#endif
+
+ public:
+  // Verification
+  const char* internal_name() const;
+  void oop_verify_on(oop obj, outputStream* st);
+  void oop_verify_old_oop(oop obj, oop* p, bool allow_dirty);
+
+};