jdk8-mips64-public/hotspot: src/share/vm/ci/ciKlass.cpp@3582bf76420e (annotated)

src/share/vm/ci/ciKlass.cpp@3582bf76420e (annotated)

src/share/vm/ci/ciKlass.cpp

Thu, 27 Jan 2011 16:11:27 -0800

author: coleenp
date: Thu, 27 Jan 2011 16:11:27 -0800
changeset 2497: 3582bf76420e
parent 2314: f95d63e2154a
child 2708: 1d1603768966
permissions: -rw-r--r--

6990754: Use native memory and reference counting to implement SymbolTable
Summary: move symbols from permgen into C heap and reference count them
Reviewed-by: never, acorn, jmasa, stefank

 /*
  * Copyright (c) 1999, 2010, 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 "ci/ciKlass.hpp"
 #include "ci/ciSymbol.hpp"
 #include "ci/ciUtilities.hpp"
 #include "oops/oop.inline.hpp"
 // ciKlass
 //
 // This class represents a klassOop in the HotSpot virtual
 // machine.
 // ------------------------------------------------------------------
 // ciKlass::ciKlass
 ciKlass::ciKlass(KlassHandle h_k) : ciType(h_k) {
   assert(get_oop()->is_klass(), "wrong type");
   Klass* k = get_Klass();
   _layout_helper = k->layout_helper();
   Symbol* klass_name = k->name();
   assert(klass_name != NULL, "wrong ciKlass constructor");
   _name = CURRENT_ENV->get_symbol(klass_name);
 }
 // ------------------------------------------------------------------
 // ciKlass::ciKlass
 //
 // Nameless klass variant.
 ciKlass::ciKlass(KlassHandle h_k, ciSymbol* name) : ciType(h_k) {
   assert(get_oop()->is_klass(), "wrong type");
   _name = name;
   _layout_helper = Klass::_lh_neutral_value;
 }
 // ------------------------------------------------------------------
 // ciKlass::ciKlass
 //
 // Unloaded klass variant.
 ciKlass::ciKlass(ciSymbol* name, ciKlass* klass) : ciType(klass) {
   _name = name;
   _layout_helper = Klass::_lh_neutral_value;
 }
 // ------------------------------------------------------------------
 // ciKlass::is_subtype_of
 bool ciKlass::is_subtype_of(ciKlass* that) {
   assert(is_loaded() && that->is_loaded(), "must be loaded");
   assert(is_java_klass() && that->is_java_klass(), "must be java klasses");
   // Check to see if the klasses are identical.
   if (this == that) {
     return true;
   }
   VM_ENTRY_MARK;
   Klass* this_klass = get_Klass();
   klassOop that_klass = that->get_klassOop();
   bool result = this_klass->is_subtype_of(that_klass);
   return result;
 }
 // ------------------------------------------------------------------
 // ciKlass::is_subclass_of
 bool ciKlass::is_subclass_of(ciKlass* that) {
   assert(is_loaded() && that->is_loaded(), "must be loaded");
   assert(is_java_klass() && that->is_java_klass(), "must be java klasses");
   // Check to see if the klasses are identical.
   VM_ENTRY_MARK;
   Klass* this_klass = get_Klass();
   klassOop that_klass = that->get_klassOop();
   bool result = this_klass->is_subclass_of(that_klass);
   return result;
 }
 // ------------------------------------------------------------------
 // ciKlass::super_depth
 juint ciKlass::super_depth() {
   assert(is_loaded(), "must be loaded");
   assert(is_java_klass(), "must be java klasses");
   VM_ENTRY_MARK;
   Klass* this_klass = get_Klass();
   return this_klass->super_depth();
 }
 // ------------------------------------------------------------------
 // ciKlass::super_check_offset
 juint ciKlass::super_check_offset() {
   assert(is_loaded(), "must be loaded");
   assert(is_java_klass(), "must be java klasses");
   VM_ENTRY_MARK;
   Klass* this_klass = get_Klass();
   return this_klass->super_check_offset();
 }
 // ------------------------------------------------------------------
 // ciKlass::super_of_depth
 ciKlass* ciKlass::super_of_depth(juint i) {
   assert(is_loaded(), "must be loaded");
   assert(is_java_klass(), "must be java klasses");
   VM_ENTRY_MARK;
   Klass* this_klass = get_Klass();
   klassOop super = this_klass->primary_super_of_depth(i);
   return (super != NULL) ? CURRENT_THREAD_ENV->get_object(super)->as_klass() : NULL;
 }
 // ------------------------------------------------------------------
 // ciKlass::can_be_primary_super
 bool ciKlass::can_be_primary_super() {
   assert(is_loaded(), "must be loaded");
   assert(is_java_klass(), "must be java klasses");
   VM_ENTRY_MARK;
   Klass* this_klass = get_Klass();
   return this_klass->can_be_primary_super();
 }
 // ------------------------------------------------------------------
 // ciKlass::least_common_ancestor
 //
 // Get the shared parent of two klasses.
 //
 // Implementation note: this method currently goes "over the wall"
 // and does all of the work on the VM side.  It could be rewritten
 // to use the super() method and do all of the work (aside from the
 // lazy computation of super()) in native mode.  This may be
 // worthwhile if the compiler is repeatedly requesting the same lca
 // computation or possibly if most of the superklasses have already
 // been created as ciObjects anyway.  Something to think about...
 ciKlass*
 ciKlass::least_common_ancestor(ciKlass* that) {
   assert(is_loaded() && that->is_loaded(), "must be loaded");
   assert(is_java_klass() && that->is_java_klass(), "must be java klasses");
   // Check to see if the klasses are identical.
   if (this == that) {
     return this;
   }
   VM_ENTRY_MARK;
   Klass* this_klass = get_Klass();
   Klass* that_klass = that->get_Klass();
   Klass* lca        = this_klass->LCA(that_klass);
   // Many times the LCA will be either this_klass or that_klass.
   // Treat these as special cases.
   if (lca == that_klass) {
     return that;
   }
   if (this_klass == lca) {
     return this;
   }
   // Create the ciInstanceKlass for the lca.
   ciKlass* result =
     CURRENT_THREAD_ENV->get_object(lca->as_klassOop())->as_klass();
   return result;
 }
 // ------------------------------------------------------------------
 // ciKlass::find_klass
 //
 // Find a klass using this klass's class loader.
 ciKlass* ciKlass::find_klass(ciSymbol* klass_name) {
   assert(is_loaded(), "cannot find_klass through an unloaded klass");
   return CURRENT_ENV->get_klass_by_name(this,
                                         klass_name, false);
 }
 // ------------------------------------------------------------------
 // ciKlass::java_mirror
 //
 // Get the instance of java.lang.Class corresponding to this klass.
 // If it is an unloaded instance or array klass, return an unloaded
 // mirror object of type Class.
 ciInstance* ciKlass::java_mirror() {
   GUARDED_VM_ENTRY(
     if (!is_loaded())
       return ciEnv::current()->get_unloaded_klass_mirror(this);
     oop java_mirror = get_Klass()->java_mirror();
     return CURRENT_ENV->get_object(java_mirror)->as_instance();
   )
 }
 // ------------------------------------------------------------------
 // ciKlass::modifier_flags
 jint ciKlass::modifier_flags() {
   assert(is_loaded(), "not loaded");
   GUARDED_VM_ENTRY(
     return get_Klass()->modifier_flags();
   )
 }
 // ------------------------------------------------------------------
 // ciKlass::access_flags
 jint ciKlass::access_flags() {
   assert(is_loaded(), "not loaded");
   GUARDED_VM_ENTRY(
     return get_Klass()->access_flags().as_int();
   )
 }
 // ------------------------------------------------------------------
 // ciKlass::print_impl
 //
 // Implementation of the print method
 void ciKlass::print_impl(outputStream* st) {
   st->print(" name=");
   print_name_on(st);
 }
 // ------------------------------------------------------------------
 // ciKlass::print_name
 //
 // Print the name of this klass
 void ciKlass::print_name_on(outputStream* st) {
   name()->print_symbol_on(st);
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/ci/ciKlass.cpp@3582bf76420e (annotated)

src/share/vm/ci/ciKlass.cpp