Mercurial > hg > truffle
diff src/share/vm/ci/ciKlass.cpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | dd57230ba8fe |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/ci/ciKlass.cpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,235 @@ +/* + * Copyright 1999-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.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 +ciInstance* ciKlass::java_mirror() { + GUARDED_VM_ENTRY( + 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); +}