/* * Copyright (c) 1999, 2009, 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 "incls/_precompiled.incl" #include "incls/_ciKlass.cpp.incl" // 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(); symbolOop klass_name = k->name(); assert(klass_name != NULL, "wrong ciKlass constructor"); _name = CURRENT_ENV->get_object(klass_name)->as_symbol(); } // ------------------------------------------------------------------ // 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); }