Mercurial > hg > graal-jvmci-8
view src/share/vm/ci/ciNullObject.hpp @ 989:148e5441d916
6863023: need non-perm oops in code cache for JSR 292
Summary: Make a special root-list for those few nmethods which might contain non-perm oops.
Reviewed-by: twisti, kvn, never, jmasa, ysr
author | jrose |
---|---|
date | Tue, 15 Sep 2009 21:53:47 -0700 |
parents | a61af66fc99e |
children | c18cbe5936b8 |
line wrap: on
line source
/* * Copyright 1999-2000 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. * */ // ciNullObject // // This class represents a null reference in the VM. class ciNullObject : public ciObject { CI_PACKAGE_ACCESS private: ciNullObject() : ciObject() {} const char* type_string() { return "ciNullObject"; } void print_impl(outputStream* st); public: // Is this ciObject a Java Language Object? That is, // is the ciObject an instance or an array bool is_java_object() { return true; } // What kind of ciObject is this? bool is_null_object() const { return true; } bool is_classless() const { return true; } // Get the distinguished instance of this klass. static ciNullObject* make(); };