--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/oops/arrayKlass.cpp	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,246 @@
+/*
+ * Copyright (c) 1997, 2017, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#include "precompiled.hpp"
+#include "classfile/javaClasses.hpp"
+#include "classfile/systemDictionary.hpp"
+#include "classfile/vmSymbols.hpp"
+#include "gc/shared/collectedHeap.inline.hpp"
+#include "gc/shared/gcLocker.hpp"
+#include "jvmtifiles/jvmti.h"
+#include "memory/metaspaceClosure.hpp"
+#include "memory/resourceArea.hpp"
+#include "memory/universe.inline.hpp"
+#include "oops/arrayKlass.hpp"
+#include "oops/arrayOop.hpp"
+#include "oops/instanceKlass.hpp"
+#include "oops/objArrayOop.hpp"
+#include "oops/oop.inline.hpp"
+
+int ArrayKlass::static_size(int header_size) {
+  // size of an array klass object
+  assert(header_size <= InstanceKlass::header_size(), "bad header size");
+  // If this assert fails, see comments in base_create_array_klass.
+  header_size = InstanceKlass::header_size();
+  int vtable_len = Universe::base_vtable_size();
+  int size = header_size + vtable_len;
+  return align_metadata_size(size);
+}
+
+
+Klass* ArrayKlass::java_super() const {
+  if (super() == NULL)  return NULL;  // bootstrap case
+  // Array klasses have primary supertypes which are not reported to Java.
+  // Example super chain:  String[][] -> Object[][] -> Object[] -> Object
+  return SystemDictionary::Object_klass();
+}
+
+
+oop ArrayKlass::multi_allocate(int rank, jint* sizes, TRAPS) {
+  ShouldNotReachHere();
+  return NULL;
+}
+
+// find field according to JVM spec 5.4.3.2, returns the klass in which the field is defined
+Klass* ArrayKlass::find_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const {
+  // There are no fields in an array klass but look to the super class (Object)
+  assert(super(), "super klass must be present");
+  return super()->find_field(name, sig, fd);
+}
+
+Method* ArrayKlass::uncached_lookup_method(const Symbol* name,
+                                           const Symbol* signature,
+                                           OverpassLookupMode overpass_mode) const {
+  // There are no methods in an array klass but the super class (Object) has some
+  assert(super(), "super klass must be present");
+  // Always ignore overpass methods in superclasses, although technically the
+  // super klass of an array, (j.l.Object) should not have
+  // any overpass methods present.
+  return super()->uncached_lookup_method(name, signature, Klass::skip_overpass);
+}
+
+ArrayKlass::ArrayKlass(Symbol* name) :
+  _dimension(1),
+  _higher_dimension(NULL),
+  _lower_dimension(NULL) {
+    // Arrays don't add any new methods, so their vtable is the same size as
+    // the vtable of klass Object.
+    set_vtable_length(Universe::base_vtable_size());
+    set_name(name);
+    set_super(Universe::is_bootstrapping() ? (Klass*)NULL : SystemDictionary::Object_klass());
+    set_layout_helper(Klass::_lh_neutral_value);
+    set_is_cloneable(); // All arrays are considered to be cloneable (See JLS 20.1.5)
+    TRACE_INIT_ID(this);
+}
+
+
+// Initialization of vtables and mirror object is done separatly from base_create_array_klass,
+// since a GC can happen. At this point all instance variables of the ArrayKlass must be setup.
+void ArrayKlass::complete_create_array_klass(ArrayKlass* k, Klass* super_klass, ModuleEntry* module_entry, TRAPS) {
+  ResourceMark rm(THREAD);
+  k->initialize_supers(super_klass, CHECK);
+  k->vtable().initialize_vtable(false, CHECK);
+
+  // During bootstrapping, before java.base is defined, the module_entry may not be present yet.
+  // These classes will be put on a fixup list and their module fields will be patched once
+  // java.base is defined.
+  assert((module_entry != NULL) || ((module_entry == NULL) && !ModuleEntryTable::javabase_defined()),
+         "module entry not available post " JAVA_BASE_NAME " definition");
+  oop module = (module_entry != NULL) ? module_entry->module() : (oop)NULL;
+  java_lang_Class::create_mirror(k, Handle(THREAD, k->class_loader()), Handle(THREAD, module), Handle(), CHECK);
+}
+
+GrowableArray<Klass*>* ArrayKlass::compute_secondary_supers(int num_extra_slots) {
+  // interfaces = { cloneable_klass, serializable_klass };
+  assert(num_extra_slots == 0, "sanity of primitive array type");
+  // Must share this for correct bootstrapping!
+  set_secondary_supers(Universe::the_array_interfaces_array());
+  return NULL;
+}
+
+bool ArrayKlass::compute_is_subtype_of(Klass* k) {
+  // An array is a subtype of Serializable, Clonable, and Object
+  return    k == SystemDictionary::Object_klass()
+         || k == SystemDictionary::Cloneable_klass()
+         || k == SystemDictionary::Serializable_klass();
+}
+
+objArrayOop ArrayKlass::allocate_arrayArray(int n, int length, TRAPS) {
+  if (length < 0) {
+    THROW_0(vmSymbols::java_lang_NegativeArraySizeException());
+  }
+  if (length > arrayOopDesc::max_array_length(T_ARRAY)) {
+    report_java_out_of_memory("Requested array size exceeds VM limit");
+    JvmtiExport::post_array_size_exhausted();
+    THROW_OOP_0(Universe::out_of_memory_error_array_size());
+  }
+  int size = objArrayOopDesc::object_size(length);
+  Klass* k = array_klass(n+dimension(), CHECK_0);
+  ArrayKlass* ak = ArrayKlass::cast(k);
+  objArrayOop o =
+    (objArrayOop)CollectedHeap::array_allocate(ak, size, length, CHECK_0);
+  // initialization to NULL not necessary, area already cleared
+  return o;
+}
+
+void ArrayKlass::array_klasses_do(void f(Klass* k, TRAPS), TRAPS) {
+  Klass* k = this;
+  // Iterate over this array klass and all higher dimensions
+  while (k != NULL) {
+    f(k, CHECK);
+    k = ArrayKlass::cast(k)->higher_dimension();
+  }
+}
+
+void ArrayKlass::array_klasses_do(void f(Klass* k)) {
+  Klass* k = this;
+  // Iterate over this array klass and all higher dimensions
+  while (k != NULL) {
+    f(k);
+    k = ArrayKlass::cast(k)->higher_dimension();
+  }
+}
+
+// JVM support
+
+jint ArrayKlass::compute_modifier_flags(TRAPS) const {
+  return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
+}
+
+// JVMTI support
+
+jint ArrayKlass::jvmti_class_status() const {
+  return JVMTI_CLASS_STATUS_ARRAY;
+}
+
+void ArrayKlass::metaspace_pointers_do(MetaspaceClosure* it) {
+  Klass::metaspace_pointers_do(it);
+
+  ResourceMark rm;
+  log_trace(cds)("Iter(ArrayKlass): %p (%s)", this, external_name());
+
+  // need to cast away volatile
+  it->push((Klass**)&_higher_dimension);
+  it->push((Klass**)&_lower_dimension);
+}
+
+void ArrayKlass::remove_unshareable_info() {
+  Klass::remove_unshareable_info();
+  if (_higher_dimension != NULL) {
+    ArrayKlass *ak = ArrayKlass::cast(higher_dimension());
+    ak->remove_unshareable_info();
+  }
+}
+
+void ArrayKlass::remove_java_mirror() {
+  Klass::remove_java_mirror();
+  if (_higher_dimension != NULL) {
+    ArrayKlass *ak = ArrayKlass::cast(higher_dimension());
+    ak->remove_java_mirror();
+  }
+}
+
+void ArrayKlass::restore_unshareable_info(ClassLoaderData* loader_data, Handle protection_domain, TRAPS) {
+  assert(loader_data == ClassLoaderData::the_null_class_loader_data(), "array classes belong to null loader");
+  Klass::restore_unshareable_info(loader_data, protection_domain, CHECK);
+  // Klass recreates the component mirror also
+
+  if (_higher_dimension != NULL) {
+    ArrayKlass *ak = ArrayKlass::cast(higher_dimension());
+    ak->restore_unshareable_info(loader_data, protection_domain, CHECK);
+  }
+}
+
+// Printing
+
+void ArrayKlass::print_on(outputStream* st) const {
+  assert(is_klass(), "must be klass");
+  Klass::print_on(st);
+}
+
+void ArrayKlass::print_value_on(outputStream* st) const {
+  assert(is_klass(), "must be klass");
+  for(int index = 0; index < dimension(); index++) {
+    st->print("[]");
+  }
+}
+
+void ArrayKlass::oop_print_on(oop obj, outputStream* st) {
+  assert(obj->is_array(), "must be array");
+  Klass::oop_print_on(obj, st);
+  st->print_cr(" - length: %d", arrayOop(obj)->length());
+}
+
+
+// Verification
+
+void ArrayKlass::verify_on(outputStream* st) {
+  Klass::verify_on(st);
+}
+
+void ArrayKlass::oop_verify_on(oop obj, outputStream* st) {
+  guarantee(obj->is_array(), "must be array");
+  arrayOop a = arrayOop(obj);
+  guarantee(a->length() >= 0, "array with negative length?");
+}