001/*
002 * Copyright (c) 2014, 2014, Oracle and/or its affiliates. All rights reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation.
008 *
009 * This code is distributed in the hope that it will be useful, but WITHOUT
010 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
011 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
012 * version 2 for more details (a copy is included in the LICENSE file that
013 * accompanied this code).
014 *
015 * You should have received a copy of the GNU General Public License version
016 * 2 along with this work; if not, write to the Free Software Foundation,
017 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
018 *
019 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
020 * or visit www.oracle.com if you need additional information or have any
021 * questions.
022 */
023package com.oracle.graal.hotspot.meta;
024
025import jdk.internal.jvmci.hotspot.*;
026import jdk.internal.jvmci.meta.*;
027
028import com.oracle.graal.api.replacements.*;
029import com.oracle.graal.hotspot.*;
030
031public class HotSpotSnippetReflectionProvider implements SnippetReflectionProvider {
032
033    private final HotSpotGraalRuntimeProvider runtime;
034
035    public HotSpotSnippetReflectionProvider(HotSpotGraalRuntimeProvider runtime) {
036        this.runtime = runtime;
037    }
038
039    @Override
040    public JavaConstant forObject(Object object) {
041        return HotSpotObjectConstantImpl.forObject(object);
042    }
043
044    @Override
045    public Object asObject(ResolvedJavaType type, JavaConstant constant) {
046        if (constant.isNull()) {
047            return null;
048        }
049        HotSpotObjectConstant hsConstant = (HotSpotObjectConstant) constant;
050        return hsConstant.asObject(type);
051    }
052
053    @Override
054    public <T> T asObject(Class<T> type, JavaConstant constant) {
055        if (constant.isNull()) {
056            return null;
057        }
058        HotSpotObjectConstant hsConstant = (HotSpotObjectConstant) constant;
059        return hsConstant.asObject(type);
060    }
061
062    @Override
063    public JavaConstant forBoxed(Kind kind, Object value) {
064        return HotSpotObjectConstantImpl.forBoxedValue(kind, value);
065    }
066
067    public Object getSubstitutionGuardParameter(Class<?> type) {
068        if (type.isInstance(runtime)) {
069            return runtime;
070        }
071        if (type.isInstance(runtime.getConfig())) {
072            return runtime.getConfig();
073        }
074        return null;
075    }
076
077    // Lazily initialized
078    private ResolvedJavaType wordTypesType;
079    private ResolvedJavaType runtimeType;
080    private ResolvedJavaType configType;
081
082    public Object getInjectedNodeIntrinsicParameter(ResolvedJavaType type) {
083        // Need to test all fields since there no guarantee under the JMM
084        // about the order in which these fields are written.
085        if (configType == null || wordTypesType == null || configType == null) {
086            MetaAccessProvider metaAccess = runtime.getHostProviders().getMetaAccess();
087            wordTypesType = metaAccess.lookupJavaType(runtime.getHostProviders().getWordTypes().getClass());
088            runtimeType = metaAccess.lookupJavaType(runtime.getClass());
089            configType = metaAccess.lookupJavaType(runtime.getConfig().getClass());
090        }
091
092        if (type.isAssignableFrom(wordTypesType)) {
093            return runtime.getHostProviders().getWordTypes();
094        }
095        if (type.isAssignableFrom(runtimeType)) {
096            return runtime;
097        }
098        if (type.isAssignableFrom(configType)) {
099            return runtime.getConfig();
100        }
101        return null;
102    }
103}