--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/runtime/fieldDescriptor.cpp	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,211 @@
+/*
+ * Copyright (c) 1997, 2015, 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/systemDictionary.hpp"
+#include "classfile/vmSymbols.hpp"
+#include "memory/resourceArea.hpp"
+#include "memory/universe.inline.hpp"
+#include "oops/annotations.hpp"
+#include "oops/instanceKlass.hpp"
+#include "oops/oop.inline.hpp"
+#include "oops/fieldStreams.hpp"
+#include "runtime/fieldDescriptor.hpp"
+#include "runtime/handles.inline.hpp"
+#include "runtime/signature.hpp"
+
+
+oop fieldDescriptor::loader() const {
+  return _cp->pool_holder()->class_loader();
+}
+
+Symbol* fieldDescriptor::generic_signature() const {
+  if (!has_generic_signature()) {
+    return NULL;
+  }
+
+  int idx = 0;
+  InstanceKlass* ik = field_holder();
+  for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
+    if (idx == _index) {
+      return fs.generic_signature();
+    } else {
+      idx ++;
+    }
+  }
+  assert(false, "should never happen");
+  return NULL;
+}
+
+AnnotationArray* fieldDescriptor::annotations() const {
+  InstanceKlass* ik = field_holder();
+  Array<AnnotationArray*>* md = ik->fields_annotations();
+  if (md == NULL)
+    return NULL;
+  return md->at(index());
+}
+
+AnnotationArray* fieldDescriptor::type_annotations() const {
+  InstanceKlass* ik = field_holder();
+  Array<AnnotationArray*>* type_annos = ik->fields_type_annotations();
+  if (type_annos == NULL)
+    return NULL;
+  return type_annos->at(index());
+}
+
+constantTag fieldDescriptor::initial_value_tag() const {
+  return constants()->tag_at(initial_value_index());
+}
+
+jint fieldDescriptor::int_initial_value() const {
+  return constants()->int_at(initial_value_index());
+}
+
+jlong fieldDescriptor::long_initial_value() const {
+  return constants()->long_at(initial_value_index());
+}
+
+jfloat fieldDescriptor::float_initial_value() const {
+  return constants()->float_at(initial_value_index());
+}
+
+jdouble fieldDescriptor::double_initial_value() const {
+  return constants()->double_at(initial_value_index());
+}
+
+oop fieldDescriptor::string_initial_value(TRAPS) const {
+  return constants()->uncached_string_at(initial_value_index(), THREAD);
+}
+
+void fieldDescriptor::reinitialize(InstanceKlass* ik, int index) {
+  if (_cp.is_null() || field_holder() != ik) {
+    _cp = constantPoolHandle(Thread::current(), ik->constants());
+    // _cp should now reference ik's constant pool; i.e., ik is now field_holder.
+    assert(field_holder() == ik, "must be already initialized to this class");
+  }
+  FieldInfo* f = ik->field(index);
+  assert(!f->is_internal(), "regular Java fields only");
+
+  _access_flags = accessFlags_from(f->access_flags());
+  guarantee(f->name_index() != 0 && f->signature_index() != 0, "bad constant pool index for fieldDescriptor");
+  _index = index;
+  verify();
+}
+
+#ifndef PRODUCT
+
+void fieldDescriptor::verify() const {
+  if (_cp.is_null()) {
+    assert(_index == badInt, "constructor must be called");  // see constructor
+  } else {
+    assert(_index >= 0, "good index");
+    assert(_index < field_holder()->java_fields_count(), "oob");
+  }
+}
+
+void fieldDescriptor::print_on(outputStream* st) const {
+  access_flags().print_on(st);
+  name()->print_value_on(st);
+  st->print(" ");
+  signature()->print_value_on(st);
+  st->print(" @%d ", offset());
+  if (WizardMode && has_initial_value()) {
+    st->print("(initval ");
+    constantTag t = initial_value_tag();
+    if (t.is_int()) {
+      st->print("int %d)", int_initial_value());
+    } else if (t.is_long()){
+      st->print_jlong(long_initial_value());
+    } else if (t.is_float()){
+      st->print("float %f)", float_initial_value());
+    } else if (t.is_double()){
+      st->print("double %lf)", double_initial_value());
+    }
+  }
+}
+
+void fieldDescriptor::print_on_for(outputStream* st, oop obj) {
+  print_on(st);
+  BasicType ft = field_type();
+  jint as_int = 0;
+  switch (ft) {
+    case T_BYTE:
+      as_int = (jint)obj->byte_field(offset());
+      st->print(" %d", obj->byte_field(offset()));
+      break;
+    case T_CHAR:
+      as_int = (jint)obj->char_field(offset());
+      {
+        jchar c = obj->char_field(offset());
+        as_int = c;
+        st->print(" %c %d", isprint(c) ? c : ' ', c);
+      }
+      break;
+    case T_DOUBLE:
+      st->print(" %lf", obj->double_field(offset()));
+      break;
+    case T_FLOAT:
+      as_int = obj->int_field(offset());
+      st->print(" %f", obj->float_field(offset()));
+      break;
+    case T_INT:
+      as_int = obj->int_field(offset());
+      st->print(" %d", obj->int_field(offset()));
+      break;
+    case T_LONG:
+      st->print(" ");
+      st->print_jlong(obj->long_field(offset()));
+      break;
+    case T_SHORT:
+      as_int = obj->short_field(offset());
+      st->print(" %d", obj->short_field(offset()));
+      break;
+    case T_BOOLEAN:
+      as_int = obj->bool_field(offset());
+      st->print(" %s", obj->bool_field(offset()) ? "true" : "false");
+      break;
+    case T_ARRAY:
+      st->print(" ");
+      NOT_LP64(as_int = obj->int_field(offset()));
+      obj->obj_field(offset())->print_value_on(st);
+      break;
+    case T_OBJECT:
+      st->print(" ");
+      NOT_LP64(as_int = obj->int_field(offset()));
+      obj->obj_field(offset())->print_value_on(st);
+      break;
+    default:
+      ShouldNotReachHere();
+      break;
+  }
+  // Print a hint as to the underlying integer representation. This can be wrong for
+  // pointers on an LP64 machine
+  if (ft == T_LONG || ft == T_DOUBLE LP64_ONLY(|| !is_java_primitive(ft)) ) {
+    st->print(" (%x %x)", obj->int_field(offset()), obj->int_field(offset()+sizeof(jint)));
+  } else if (as_int < 0 || as_int > 9) {
+    st->print(" (%x)", as_int);
+  }
+}
+
+#endif /* PRODUCT */