hotspot/src/share/vm/ci/ciInstanceKlass.cpp
author coleenp
Sat, 01 Sep 2012 13:25:18 -0400
changeset 13728 882756847a04
parent 12369 48fd3da4025c
child 14477 95e66ea71f71
permissions -rw-r--r--
6964458: Reimplement class meta-data storage to use native memory Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
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/*
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 * Copyright (c) 1999, 2012, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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#include "precompiled.hpp"
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#include "ci/ciField.hpp"
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#include "ci/ciInstance.hpp"
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#include "ci/ciInstanceKlass.hpp"
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#include "ci/ciUtilities.hpp"
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#include "classfile/systemDictionary.hpp"
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#include "memory/allocation.hpp"
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#include "memory/allocation.inline.hpp"
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#include "oops/oop.inline.hpp"
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#include "oops/fieldStreams.hpp"
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#include "runtime/fieldDescriptor.hpp"
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// ciInstanceKlass
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//
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// This class represents a Klass* in the HotSpot virtual machine
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// whose Klass part in an InstanceKlass.
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// ------------------------------------------------------------------
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// ciInstanceKlass::ciInstanceKlass
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//
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// Loaded instance klass.
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ciInstanceKlass::ciInstanceKlass(KlassHandle h_k) :
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  ciKlass(h_k), _non_static_fields(NULL)
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{
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  assert(get_Klass()->oop_is_instance(), "wrong type");
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  assert(get_instanceKlass()->is_loaded(), "must be at least loaded");
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  InstanceKlass* ik = get_instanceKlass();
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  AccessFlags access_flags = ik->access_flags();
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  _flags = ciFlags(access_flags);
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  _has_finalizer = access_flags.has_finalizer();
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  _has_subklass = ik->subklass() != NULL;
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  _init_state = ik->init_state();
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  _nonstatic_field_size = ik->nonstatic_field_size();
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  _has_nonstatic_fields = ik->has_nonstatic_fields();
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  _nonstatic_fields = NULL; // initialized lazily by compute_nonstatic_fields:
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  _implementor = NULL; // we will fill these lazily
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  Thread *thread = Thread::current();
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  if (ciObjectFactory::is_initialized()) {
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    _loader = JNIHandles::make_local(thread, ik->class_loader());
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    _protection_domain = JNIHandles::make_local(thread,
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                                                ik->protection_domain());
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    _is_shared = false;
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  } else {
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    Handle h_loader(thread, ik->class_loader());
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    Handle h_protection_domain(thread, ik->protection_domain());
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    _loader = JNIHandles::make_global(h_loader);
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    _protection_domain = JNIHandles::make_global(h_protection_domain);
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    _is_shared = true;
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  }
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  // Lazy fields get filled in only upon request.
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  _super  = NULL;
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  _java_mirror = NULL;
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  if (is_shared()) {
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    if (h_k() != SystemDictionary::Object_klass()) {
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      super();
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    }
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    //compute_nonstatic_fields();  // done outside of constructor
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  }
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  _field_cache = NULL;
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}
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// Version for unloaded classes:
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ciInstanceKlass::ciInstanceKlass(ciSymbol* name,
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                                 jobject loader, jobject protection_domain)
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  : ciKlass(name, T_OBJECT)
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{
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  assert(name->byte_at(0) != '[', "not an instance klass");
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  _init_state = (InstanceKlass::ClassState)0;
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  _nonstatic_field_size = -1;
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  _has_nonstatic_fields = false;
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  _nonstatic_fields = NULL;
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  _loader = loader;
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  _protection_domain = protection_domain;
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  _is_shared = false;
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  _super = NULL;
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  _java_mirror = NULL;
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  _field_cache = NULL;
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}
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// ------------------------------------------------------------------
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// ciInstanceKlass::compute_shared_is_initialized
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void ciInstanceKlass::compute_shared_init_state() {
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  GUARDED_VM_ENTRY(
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    InstanceKlass* ik = get_instanceKlass();
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    _init_state = ik->init_state();
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  )
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}
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// ------------------------------------------------------------------
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// ciInstanceKlass::compute_shared_has_subklass
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bool ciInstanceKlass::compute_shared_has_subklass() {
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  GUARDED_VM_ENTRY(
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    InstanceKlass* ik = get_instanceKlass();
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    _has_subklass = ik->subklass() != NULL;
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    return _has_subklass;
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  )
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}
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// ------------------------------------------------------------------
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// ciInstanceKlass::loader
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oop ciInstanceKlass::loader() {
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  ASSERT_IN_VM;
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  return JNIHandles::resolve(_loader);
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}
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// ------------------------------------------------------------------
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// ciInstanceKlass::loader_handle
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jobject ciInstanceKlass::loader_handle() {
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  return _loader;
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}
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// ------------------------------------------------------------------
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// ciInstanceKlass::protection_domain
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oop ciInstanceKlass::protection_domain() {
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  ASSERT_IN_VM;
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  return JNIHandles::resolve(_protection_domain);
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}
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// ------------------------------------------------------------------
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// ciInstanceKlass::protection_domain_handle
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jobject ciInstanceKlass::protection_domain_handle() {
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  return _protection_domain;
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}
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// ------------------------------------------------------------------
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// ciInstanceKlass::field_cache
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//
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// Get the field cache associated with this klass.
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ciConstantPoolCache* ciInstanceKlass::field_cache() {
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  if (is_shared()) {
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    return NULL;
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  }
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  if (_field_cache == NULL) {
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    assert(!is_java_lang_Object(), "Object has no fields");
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    Arena* arena = CURRENT_ENV->arena();
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    _field_cache = new (arena) ciConstantPoolCache(arena, 5);
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  }
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  return _field_cache;
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}
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// ------------------------------------------------------------------
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// ciInstanceKlass::get_canonical_holder
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//
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ciInstanceKlass* ciInstanceKlass::get_canonical_holder(int offset) {
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  #ifdef ASSERT
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  if (!(offset >= 0 && offset < layout_helper())) {
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    tty->print("*** get_canonical_holder(%d) on ", offset);
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    this->print();
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    tty->print_cr(" ***");
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  };
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  assert(offset >= 0 && offset < layout_helper(), "offset must be tame");
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  #endif
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  if (offset < instanceOopDesc::base_offset_in_bytes()) {
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    // All header offsets belong properly to java/lang/Object.
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    return CURRENT_ENV->Object_klass();
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  }
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  ciInstanceKlass* self = this;
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  for (;;) {
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    assert(self->is_loaded(), "must be loaded to have size");
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    ciInstanceKlass* super = self->super();
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    if (super == NULL || super->nof_nonstatic_fields() == 0 ||
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        !super->contains_field_offset(offset)) {
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      return self;
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    } else {
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      self = super;  // return super->get_canonical_holder(offset)
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    }
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  }
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}
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// ------------------------------------------------------------------
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// ciInstanceKlass::is_java_lang_Object
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//
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// Is this klass java.lang.Object?
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bool ciInstanceKlass::is_java_lang_Object() const {
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  return equals(CURRENT_ENV->Object_klass());
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}
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// ------------------------------------------------------------------
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// ciInstanceKlass::uses_default_loader
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bool ciInstanceKlass::uses_default_loader() {
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  // Note:  We do not need to resolve the handle or enter the VM
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  // in order to test null-ness.
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  return _loader == NULL;
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}
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// ------------------------------------------------------------------
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// ciInstanceKlass::is_in_package
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//
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// Is this klass in the given package?
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bool ciInstanceKlass::is_in_package(const char* packagename, int len) {
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  // To avoid class loader mischief, this test always rejects application classes.
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  if (!uses_default_loader())
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    return false;
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  GUARDED_VM_ENTRY(
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    return is_in_package_impl(packagename, len);
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  )
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}
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bool ciInstanceKlass::is_in_package_impl(const char* packagename, int len) {
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  ASSERT_IN_VM;
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  // If packagename contains trailing '/' exclude it from the
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  // prefix-test since we test for it explicitly.
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  if (packagename[len - 1] == '/')
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    len--;
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  if (!name()->starts_with(packagename, len))
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    return false;
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  // Test if the class name is something like "java/lang".
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  if ((len + 1) > name()->utf8_length())
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    return false;
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  // Test for trailing '/'
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  if ((char) name()->byte_at(len) != '/')
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    return false;
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  // Make sure it's not actually in a subpackage:
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  if (name()->index_of_at(len+1, "/", 1) >= 0)
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    return false;
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  return true;
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}
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// ------------------------------------------------------------------
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// ciInstanceKlass::print_impl
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//
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// Implementation of the print method.
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void ciInstanceKlass::print_impl(outputStream* st) {
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  ciKlass::print_impl(st);
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  GUARDED_VM_ENTRY(st->print(" loader=0x%x", (address)loader());)
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  if (is_loaded()) {
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    st->print(" loaded=true initialized=%s finalized=%s subklass=%s size=%d flags=",
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              bool_to_str(is_initialized()),
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              bool_to_str(has_finalizer()),
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              bool_to_str(has_subklass()),
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              layout_helper());
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    _flags.print_klass_flags();
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    if (_super) {
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      st->print(" super=");
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      _super->print_name();
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    }
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    if (_java_mirror) {
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      st->print(" mirror=PRESENT");
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    }
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  } else {
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    st->print(" loaded=false");
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  }
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}
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// ------------------------------------------------------------------
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// ciInstanceKlass::super
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//
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// Get the superklass of this klass.
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ciInstanceKlass* ciInstanceKlass::super() {
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  assert(is_loaded(), "must be loaded");
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  if (_super == NULL && !is_java_lang_Object()) {
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    GUARDED_VM_ENTRY(
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      Klass* super_klass = get_instanceKlass()->super();
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      _super = CURRENT_ENV->get_instance_klass(super_klass);
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    )
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  }
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  return _super;
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}
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// ------------------------------------------------------------------
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// ciInstanceKlass::java_mirror
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//
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// Get the instance of java.lang.Class corresponding to this klass.
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// Cache it on this->_java_mirror.
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ciInstance* ciInstanceKlass::java_mirror() {
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  if (is_shared()) {
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    return ciKlass::java_mirror();
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  }
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  if (_java_mirror == NULL) {
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    _java_mirror = ciKlass::java_mirror();
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  }
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  return _java_mirror;
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}
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// ------------------------------------------------------------------
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// ciInstanceKlass::unique_concrete_subklass
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ciInstanceKlass* ciInstanceKlass::unique_concrete_subklass() {
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  if (!is_loaded())     return NULL; // No change if class is not loaded
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  if (!is_abstract())   return NULL; // Only applies to abstract classes.
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  if (!has_subklass())  return NULL; // Must have at least one subklass.
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  VM_ENTRY_MARK;
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  InstanceKlass* ik = get_instanceKlass();
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  Klass* up = ik->up_cast_abstract();
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  assert(up->oop_is_instance(), "must be InstanceKlass");
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  if (ik == up) {
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    return NULL;
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  }
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  return CURRENT_THREAD_ENV->get_instance_klass(up);
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}
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// ------------------------------------------------------------------
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// ciInstanceKlass::has_finalizable_subclass
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bool ciInstanceKlass::has_finalizable_subclass() {
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  if (!is_loaded())     return true;
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  VM_ENTRY_MARK;
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  return Dependencies::find_finalizable_subclass(get_instanceKlass()) != NULL;
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}
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// ------------------------------------------------------------------
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// ciInstanceKlass::get_field_by_offset
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ciField* ciInstanceKlass::get_field_by_offset(int field_offset, bool is_static) {
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  if (!is_static) {
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    for (int i = 0, len = nof_nonstatic_fields(); i < len; i++) {
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      ciField* field = _nonstatic_fields->at(i);
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      int  field_off = field->offset_in_bytes();
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      if (field_off == field_offset)
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        return field;
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      if (field_off > field_offset)
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        break;
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      // could do binary search or check bins, but probably not worth it
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    }
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    return NULL;
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  }
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  VM_ENTRY_MARK;
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  InstanceKlass* k = get_instanceKlass();
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  fieldDescriptor fd;
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  if (!k->find_field_from_offset(field_offset, is_static, &fd)) {
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    return NULL;
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  }
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  ciField* field = new (CURRENT_THREAD_ENV->arena()) ciField(&fd);
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  return field;
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}
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// ------------------------------------------------------------------
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   367
// ciInstanceKlass::get_field_by_name
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parents: 670
diff changeset
   368
ciField* ciInstanceKlass::get_field_by_name(ciSymbol* name, ciSymbol* signature, bool is_static) {
6d700b859b3e 6892658: C2 should optimize some stringbuilder patterns
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parents: 670
diff changeset
   369
  VM_ENTRY_MARK;
13728
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coleenp
parents: 12369
diff changeset
   370
  InstanceKlass* k = get_instanceKlass();
4450
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parents: 670
diff changeset
   371
  fieldDescriptor fd;
13728
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coleenp
parents: 12369
diff changeset
   372
  Klass* def = k->find_field(name->get_symbol(), signature->get_symbol(), is_static, &fd);
4450
6d700b859b3e 6892658: C2 should optimize some stringbuilder patterns
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parents: 670
diff changeset
   373
  if (def == NULL) {
6d700b859b3e 6892658: C2 should optimize some stringbuilder patterns
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parents: 670
diff changeset
   374
    return NULL;
6d700b859b3e 6892658: C2 should optimize some stringbuilder patterns
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parents: 670
diff changeset
   375
  }
6d700b859b3e 6892658: C2 should optimize some stringbuilder patterns
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parents: 670
diff changeset
   376
  ciField* field = new (CURRENT_THREAD_ENV->arena()) ciField(&fd);
6d700b859b3e 6892658: C2 should optimize some stringbuilder patterns
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parents: 670
diff changeset
   377
  return field;
6d700b859b3e 6892658: C2 should optimize some stringbuilder patterns
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parents: 670
diff changeset
   378
}
6d700b859b3e 6892658: C2 should optimize some stringbuilder patterns
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parents: 670
diff changeset
   379
6d700b859b3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 670
diff changeset
   380
// ------------------------------------------------------------------
217
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   381
// ciInstanceKlass::non_static_fields.
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   382
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   383
class NonStaticFieldFiller: public FieldClosure {
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   384
  GrowableArray<ciField*>* _arr;
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   385
  ciEnv* _curEnv;
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   386
public:
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   387
  NonStaticFieldFiller(ciEnv* curEnv, GrowableArray<ciField*>* arr) :
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   388
    _curEnv(curEnv), _arr(arr)
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   389
  {}
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   390
  void do_field(fieldDescriptor* fd) {
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   391
    ciField* field = new (_curEnv->arena()) ciField(fd);
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   392
    _arr->append(field);
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   393
  }
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   394
};
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   395
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   396
GrowableArray<ciField*>* ciInstanceKlass::non_static_fields() {
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   397
  if (_non_static_fields == NULL) {
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   398
    VM_ENTRY_MARK;
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   399
    ciEnv* curEnv = ciEnv::current();
13728
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coleenp
parents: 12369
diff changeset
   400
    InstanceKlass* ik = get_instanceKlass();
10546
e79347eebbc5 7086585: make Java field injection more flexible
never
parents: 8725
diff changeset
   401
    int max_n_fields = ik->java_fields_count();
217
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   402
6180
53c1bf468c81 6973963: SEGV in ciBlock::start_bci() with EA
kvn
parents: 5925
diff changeset
   403
    Arena* arena = curEnv->arena();
217
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   404
    _non_static_fields =
6180
53c1bf468c81 6973963: SEGV in ciBlock::start_bci() with EA
kvn
parents: 5925
diff changeset
   405
      new (arena) GrowableArray<ciField*>(arena, max_n_fields, 0, NULL);
217
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   406
    NonStaticFieldFiller filler(curEnv, _non_static_fields);
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   407
    ik->do_nonstatic_fields(&filler);
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   408
  }
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   409
  return _non_static_fields;
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   410
}
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   411
1
489c9b5090e2 Initial load
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parents:
diff changeset
   412
static int sort_field_by_offset(ciField** a, ciField** b) {
489c9b5090e2 Initial load
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parents:
diff changeset
   413
  return (*a)->offset_in_bytes() - (*b)->offset_in_bytes();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   414
  // (no worries about 32-bit overflow...)
489c9b5090e2 Initial load
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parents:
diff changeset
   415
}
489c9b5090e2 Initial load
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parents:
diff changeset
   416
489c9b5090e2 Initial load
duke
parents:
diff changeset
   417
// ------------------------------------------------------------------
489c9b5090e2 Initial load
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parents:
diff changeset
   418
// ciInstanceKlass::compute_nonstatic_fields
489c9b5090e2 Initial load
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parents:
diff changeset
   419
int ciInstanceKlass::compute_nonstatic_fields() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   420
  assert(is_loaded(), "must be loaded");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   421
489c9b5090e2 Initial load
duke
parents:
diff changeset
   422
  if (_nonstatic_fields != NULL)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   423
    return _nonstatic_fields->length();
489c9b5090e2 Initial load
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parents:
diff changeset
   424
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 217
diff changeset
   425
  if (!has_nonstatic_fields()) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   426
    Arena* arena = CURRENT_ENV->arena();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   427
    _nonstatic_fields = new (arena) GrowableArray<ciField*>(arena, 0, 0, NULL);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   428
    return 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   429
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   430
  assert(!is_java_lang_Object(), "bootstrap OK");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   431
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 217
diff changeset
   432
  // Size in bytes of my fields, including inherited fields.
591
04d2e26e6d69 6703888: Compressed Oops: use the 32-bits gap after klass in a object
kvn
parents: 360
diff changeset
   433
  int fsize = nonstatic_field_size() * heapOopSize;
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 217
diff changeset
   434
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   435
  ciInstanceKlass* super = this->super();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   436
  GrowableArray<ciField*>* super_fields = NULL;
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 217
diff changeset
   437
  if (super != NULL && super->has_nonstatic_fields()) {
591
04d2e26e6d69 6703888: Compressed Oops: use the 32-bits gap after klass in a object
kvn
parents: 360
diff changeset
   438
    int super_fsize  = super->nonstatic_field_size() * heapOopSize;
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 217
diff changeset
   439
    int super_flen   = super->nof_nonstatic_fields();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   440
    super_fields = super->_nonstatic_fields;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   441
    assert(super_flen == 0 || super_fields != NULL, "first get nof_fields");
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 217
diff changeset
   442
    // See if I am no larger than my super; if so, I can use his fields.
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 217
diff changeset
   443
    if (fsize == super_fsize) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 217
diff changeset
   444
      _nonstatic_fields = super_fields;
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 217
diff changeset
   445
      return super_fields->length();
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 217
diff changeset
   446
    }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   447
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   448
489c9b5090e2 Initial load
duke
parents:
diff changeset
   449
  GrowableArray<ciField*>* fields = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   450
  GUARDED_VM_ENTRY({
489c9b5090e2 Initial load
duke
parents:
diff changeset
   451
      fields = compute_nonstatic_fields_impl(super_fields);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   452
    });
489c9b5090e2 Initial load
duke
parents:
diff changeset
   453
489c9b5090e2 Initial load
duke
parents:
diff changeset
   454
  if (fields == NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   455
    // This can happen if this class (java.lang.Class) has invisible fields.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   456
    _nonstatic_fields = super_fields;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   457
    return super_fields->length();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   458
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   459
489c9b5090e2 Initial load
duke
parents:
diff changeset
   460
  int flen = fields->length();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   461
489c9b5090e2 Initial load
duke
parents:
diff changeset
   462
  // Now sort them by offset, ascending.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   463
  // (In principle, they could mix with superclass fields.)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   464
  fields->sort(sort_field_by_offset);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   465
  _nonstatic_fields = fields;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   466
  return flen;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   467
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   468
489c9b5090e2 Initial load
duke
parents:
diff changeset
   469
GrowableArray<ciField*>*
489c9b5090e2 Initial load
duke
parents:
diff changeset
   470
ciInstanceKlass::compute_nonstatic_fields_impl(GrowableArray<ciField*>*
489c9b5090e2 Initial load
duke
parents:
diff changeset
   471
                                               super_fields) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   472
  ASSERT_IN_VM;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   473
  Arena* arena = CURRENT_ENV->arena();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   474
  int flen = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   475
  GrowableArray<ciField*>* fields = NULL;
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 12369
diff changeset
   476
  InstanceKlass* k = get_instanceKlass();
10546
e79347eebbc5 7086585: make Java field injection more flexible
never
parents: 8725
diff changeset
   477
  for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
e79347eebbc5 7086585: make Java field injection more flexible
never
parents: 8725
diff changeset
   478
    if (fs.access_flags().is_static())  continue;
e79347eebbc5 7086585: make Java field injection more flexible
never
parents: 8725
diff changeset
   479
    flen += 1;
e79347eebbc5 7086585: make Java field injection more flexible
never
parents: 8725
diff changeset
   480
  }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   481
10546
e79347eebbc5 7086585: make Java field injection more flexible
never
parents: 8725
diff changeset
   482
  // allocate the array:
e79347eebbc5 7086585: make Java field injection more flexible
never
parents: 8725
diff changeset
   483
  if (flen == 0) {
e79347eebbc5 7086585: make Java field injection more flexible
never
parents: 8725
diff changeset
   484
    return NULL;  // return nothing if none are locally declared
e79347eebbc5 7086585: make Java field injection more flexible
never
parents: 8725
diff changeset
   485
  }
e79347eebbc5 7086585: make Java field injection more flexible
never
parents: 8725
diff changeset
   486
  if (super_fields != NULL) {
e79347eebbc5 7086585: make Java field injection more flexible
never
parents: 8725
diff changeset
   487
    flen += super_fields->length();
e79347eebbc5 7086585: make Java field injection more flexible
never
parents: 8725
diff changeset
   488
  }
e79347eebbc5 7086585: make Java field injection more flexible
never
parents: 8725
diff changeset
   489
  fields = new (arena) GrowableArray<ciField*>(arena, flen, 0, NULL);
e79347eebbc5 7086585: make Java field injection more flexible
never
parents: 8725
diff changeset
   490
  if (super_fields != NULL) {
e79347eebbc5 7086585: make Java field injection more flexible
never
parents: 8725
diff changeset
   491
    fields->appendAll(super_fields);
e79347eebbc5 7086585: make Java field injection more flexible
never
parents: 8725
diff changeset
   492
  }
e79347eebbc5 7086585: make Java field injection more flexible
never
parents: 8725
diff changeset
   493
e79347eebbc5 7086585: make Java field injection more flexible
never
parents: 8725
diff changeset
   494
  for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
e79347eebbc5 7086585: make Java field injection more flexible
never
parents: 8725
diff changeset
   495
    if (fs.access_flags().is_static())  continue;
e79347eebbc5 7086585: make Java field injection more flexible
never
parents: 8725
diff changeset
   496
    fieldDescriptor fd;
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 12369
diff changeset
   497
    fd.initialize(k, fs.index());
10546
e79347eebbc5 7086585: make Java field injection more flexible
never
parents: 8725
diff changeset
   498
    ciField* field = new (arena) ciField(&fd);
e79347eebbc5 7086585: make Java field injection more flexible
never
parents: 8725
diff changeset
   499
    fields->append(field);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   500
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   501
  assert(fields->length() == flen, "sanity");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   502
  return fields;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   503
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   504
489c9b5090e2 Initial load
duke
parents:
diff changeset
   505
// ------------------------------------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
   506
// ciInstanceKlass::find_method
489c9b5090e2 Initial load
duke
parents:
diff changeset
   507
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
   508
// Find a method in this klass.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   509
ciMethod* ciInstanceKlass::find_method(ciSymbol* name, ciSymbol* signature) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   510
  VM_ENTRY_MARK;
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 12369
diff changeset
   511
  InstanceKlass* k = get_instanceKlass();
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   512
  Symbol* name_sym = name->get_symbol();
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   513
  Symbol* sig_sym= signature->get_symbol();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   514
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 12369
diff changeset
   515
  Method* m = k->find_method(name_sym, sig_sym);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   516
  if (m == NULL)  return NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   517
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 12369
diff changeset
   518
  return CURRENT_THREAD_ENV->get_method(m);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   519
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   520
489c9b5090e2 Initial load
duke
parents:
diff changeset
   521
// ------------------------------------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
   522
// ciInstanceKlass::is_leaf_type
489c9b5090e2 Initial load
duke
parents:
diff changeset
   523
bool ciInstanceKlass::is_leaf_type() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   524
  assert(is_loaded(), "must be loaded");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   525
  if (is_shared()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   526
    return is_final();  // approximately correct
489c9b5090e2 Initial load
duke
parents:
diff changeset
   527
  } else {
12369
48fd3da4025c 7154670: The instanceKlass _implementors[] and _nof_implementors are not needed for non-interface klass.
jiangli
parents: 11407
diff changeset
   528
    return !_has_subklass && (nof_implementors() == 0);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   529
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   530
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   531
489c9b5090e2 Initial load
duke
parents:
diff changeset
   532
// ------------------------------------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
   533
// ciInstanceKlass::implementor
489c9b5090e2 Initial load
duke
parents:
diff changeset
   534
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
   535
// Report an implementor of this interface.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   536
// Note that there are various races here, since my copy
489c9b5090e2 Initial load
duke
parents:
diff changeset
   537
// of _nof_implementors might be out of date with respect
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 12369
diff changeset
   538
// to results returned by InstanceKlass::implementor.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   539
// This is OK, since any dependencies we decide to assert
489c9b5090e2 Initial load
duke
parents:
diff changeset
   540
// will be checked later under the Compile_lock.
12369
48fd3da4025c 7154670: The instanceKlass _implementors[] and _nof_implementors are not needed for non-interface klass.
jiangli
parents: 11407
diff changeset
   541
ciInstanceKlass* ciInstanceKlass::implementor() {
48fd3da4025c 7154670: The instanceKlass _implementors[] and _nof_implementors are not needed for non-interface klass.
jiangli
parents: 11407
diff changeset
   542
  ciInstanceKlass* impl = _implementor;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   543
  if (impl == NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   544
    // Go into the VM to fetch the implementor.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   545
    {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   546
      VM_ENTRY_MARK;
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 12369
diff changeset
   547
      Klass* k = get_instanceKlass()->implementor();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   548
      if (k != NULL) {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 12369
diff changeset
   549
        if (k == get_instanceKlass()) {
12369
48fd3da4025c 7154670: The instanceKlass _implementors[] and _nof_implementors are not needed for non-interface klass.
jiangli
parents: 11407
diff changeset
   550
          // More than one implementors. Use 'this' in this case.
48fd3da4025c 7154670: The instanceKlass _implementors[] and _nof_implementors are not needed for non-interface klass.
jiangli
parents: 11407
diff changeset
   551
          impl = this;
48fd3da4025c 7154670: The instanceKlass _implementors[] and _nof_implementors are not needed for non-interface klass.
jiangli
parents: 11407
diff changeset
   552
        } else {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 12369
diff changeset
   553
          impl = CURRENT_THREAD_ENV->get_instance_klass(k);
12369
48fd3da4025c 7154670: The instanceKlass _implementors[] and _nof_implementors are not needed for non-interface klass.
jiangli
parents: 11407
diff changeset
   554
        }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   555
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   556
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   557
    // Memoize this result.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   558
    if (!is_shared()) {
12369
48fd3da4025c 7154670: The instanceKlass _implementors[] and _nof_implementors are not needed for non-interface klass.
jiangli
parents: 11407
diff changeset
   559
      _implementor = impl;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   560
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   561
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   562
  return impl;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   563
}