| /* |
| * Copyright (c) 1999, 2013, 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 Klass* in the HotSpot virtual |
| // machine. |
| |
| // ------------------------------------------------------------------ |
| // ciKlass::ciKlass |
| ciKlass::ciKlass(KlassHandle h_k) : ciType(h_k) { |
| assert(get_Klass()->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_Klass()->is_klass(), "wrong type"); |
| _name = name; |
| _layout_helper = Klass::_lh_neutral_value; |
| } |
| |
| // ------------------------------------------------------------------ |
| // ciKlass::ciKlass |
| // |
| // Unloaded klass variant. |
| ciKlass::ciKlass(ciSymbol* name, BasicType bt) : ciType(bt) { |
| _name = name; |
| _layout_helper = Klass::_lh_neutral_value; |
| } |
| |
| // ------------------------------------------------------------------ |
| // ciKlass::is_subtype_of |
| bool ciKlass::is_subtype_of(ciKlass* that) { |
| assert(this->is_loaded(), err_msg("must be loaded: %s", this->name()->as_quoted_ascii())); |
| assert(that->is_loaded(), err_msg("must be loaded: %s", that->name()->as_quoted_ascii())); |
| |
| // Check to see if the klasses are identical. |
| if (this == that) { |
| return true; |
| } |
| |
| VM_ENTRY_MARK; |
| Klass* this_klass = get_Klass(); |
| Klass* that_klass = that->get_Klass(); |
| bool result = this_klass->is_subtype_of(that_klass); |
| |
| return result; |
| } |
| |
| // ------------------------------------------------------------------ |
| // ciKlass::is_subclass_of |
| bool ciKlass::is_subclass_of(ciKlass* that) { |
| assert(this->is_loaded(), err_msg("must be loaded: %s", this->name()->as_quoted_ascii())); |
| assert(that->is_loaded(), err_msg("must be loaded: %s", that->name()->as_quoted_ascii())); |
| |
| VM_ENTRY_MARK; |
| Klass* this_klass = get_Klass(); |
| Klass* that_klass = that->get_Klass(); |
| bool result = this_klass->is_subclass_of(that_klass); |
| |
| return result; |
| } |
| |
| // ------------------------------------------------------------------ |
| // ciKlass::super_depth |
| juint ciKlass::super_depth() { |
| assert(is_loaded(), "must be loaded"); |
| |
| 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"); |
| |
| 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"); |
| |
| VM_ENTRY_MARK; |
| Klass* this_klass = get_Klass(); |
| Klass* super = this_klass->primary_super_of_depth(i); |
| return (super != NULL) ? CURRENT_THREAD_ENV->get_klass(super) : NULL; |
| } |
| |
| // ------------------------------------------------------------------ |
| // ciKlass::can_be_primary_super |
| bool ciKlass::can_be_primary_super() { |
| assert(is_loaded(), "must be loaded"); |
| |
| 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"); |
| // 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_klass(lca); |
| |
| 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_instance(java_mirror); |
| ) |
| } |
| |
| // ------------------------------------------------------------------ |
| // 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); |
| } |