instanceMirrorKlass.cpp

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
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 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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#include "precompiled.hpp"
#include "classfile/javaClasses.inline.hpp"
#include "gc/shared/collectedHeap.inline.hpp"
#include "memory/iterator.inline.hpp"
#include "memory/oopFactory.hpp"
#include "memory/universe.hpp"
#include "oops/instanceKlass.hpp"
#include "oops/instanceMirrorKlass.hpp"
#include "oops/instanceOop.hpp"
#include "oops/oop.inline.hpp"
#include "oops/symbol.hpp"
#include "runtime/handles.inline.hpp"
#include "utilities/macros.hpp"

int InstanceMirrorKlass::_offset_of_static_fields = 0;

int InstanceMirrorKlass::instance_size(Klass* k) {
  if (k != NULL && k->is_instance_klass()) {
    return align_object_size(size_helper() + InstanceKlass::cast(k)->static_field_size());
  }
  return size_helper();
}

instanceOop InstanceMirrorKlass::allocate_instance(Klass* k, TRAPS) {
  // Query before forming handle.
  int size = instance_size(k);
  assert(size > 0, "total object size must be positive: %d", size);

  // Since mirrors can be variable sized because of the static fields, store
  // the size in the mirror itself.
  return (instanceOop)Universe::heap()->class_allocate(this, size, THREAD);
}

int InstanceMirrorKlass::oop_size(oop obj) const {
  return java_lang_Class::oop_size_raw(obj);
}

int InstanceMirrorKlass::compute_static_oop_field_count(oop obj) {
  Klass* k = java_lang_Class::as_Klass(obj);
  if (k != NULL && k->is_instance_klass()) {
    return InstanceKlass::cast(k)->static_oop_field_count();
  }
  return 0;
}

#if INCLUDE_CDS
void InstanceMirrorKlass::serialize_offsets(SerializeClosure* f) {
  f->do_u4((u4*)&_offset_of_static_fields);
}
#endif