author | kvn |
Wed, 01 May 2019 12:31:29 -0700 | |
changeset 54669 | ad45b3802d4e |
parent 50858 | 2d3e99a72541 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2009, 2019, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package jdk.vm.ci.hotspot; |
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import static jdk.vm.ci.hotspot.HotSpotJVMCIRuntime.runtime; |
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import jdk.vm.ci.meta.Assumptions; |
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import jdk.vm.ci.meta.JavaConstant; |
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import jdk.vm.ci.meta.JavaKind; |
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import jdk.vm.ci.meta.ResolvedJavaType; |
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/** |
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* Represents a constant non-{@code null} object reference, within the compiler and across the |
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* compiler/runtime interface. |
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*/ |
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abstract class HotSpotObjectConstantImpl implements HotSpotObjectConstant { |
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protected final boolean compressed; |
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HotSpotObjectConstantImpl(boolean compressed) { |
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this.compressed = compressed; |
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} |
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@Override |
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public JavaKind getJavaKind() { |
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return JavaKind.Object; |
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} |
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@Override |
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public boolean isCompressed() { |
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return compressed; |
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} |
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@Override |
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public abstract JavaConstant compress(); |
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@Override |
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public abstract JavaConstant uncompress(); |
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@Override |
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public HotSpotResolvedObjectType getType() { |
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return runtime().reflection.getType(this); |
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} |
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@Override |
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public abstract int getIdentityHashCode(); |
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@Override |
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public JavaConstant getCallSiteTarget(Assumptions assumptions) { |
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if (runtime().getCallSite().isInstance(this)) { |
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HotSpotObjectConstantImpl target = (HotSpotObjectConstantImpl) runtime().getHostJVMCIBackend().getConstantReflection().readFieldValue( |
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HotSpotMethodHandleAccessProvider.Internals.instance().callSiteTargetField, this); |
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if (!runtime().getConstantCallSite().isInstance(this)) { |
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if (assumptions == null) { |
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return null; |
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} |
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assumptions.record(new Assumptions.CallSiteTargetValue(this, target)); |
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} |
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return target; |
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} |
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return null; |
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} |
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@Override |
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public boolean isInternedString() { |
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return runtime().compilerToVm.isInternedString(this); |
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} |
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@Override |
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public <T> T asObject(Class<T> type) { |
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return runtime().reflection.asObject(this, type); |
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} |
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@Override |
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public Object asObject(ResolvedJavaType type) { |
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return runtime().reflection.asObject(this, (HotSpotResolvedJavaType) type); |
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} |
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@Override |
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public boolean isNull() { |
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return false; |
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} |
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@Override |
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public boolean isDefaultForKind() { |
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return false; |
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} |
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@Override |
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public Object asBoxedPrimitive() { |
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throw new IllegalArgumentException(); |
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} |
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@Override |
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public int asInt() { |
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throw new IllegalArgumentException(); |
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} |
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@Override |
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public boolean asBoolean() { |
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throw new IllegalArgumentException(); |
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} |
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@Override |
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public long asLong() { |
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throw new IllegalArgumentException(); |
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} |
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@Override |
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public float asFloat() { |
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throw new IllegalArgumentException(); |
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} |
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@Override |
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public double asDouble() { |
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throw new IllegalArgumentException(); |
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} |
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@Override |
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public boolean equals(Object o) { |
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if (o == this) { |
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return true; |
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} else if (o instanceof HotSpotObjectConstantImpl) { |
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HotSpotObjectConstantImpl other = (HotSpotObjectConstantImpl) o; |
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return runtime().reflection.equals(this, other); |
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} |
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return false; |
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} |
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@Override |
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public int hashCode() { |
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return getIdentityHashCode(); |
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} |
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@Override |
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public String toValueString() { |
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if (runtime().getJavaLangString().isInstance(this)) { |
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return "\"" + runtime().reflection.asString(this) + "\""; |
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} else { |
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return runtime().reflection.formatString(this); |
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} |
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} |
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@Override |
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public String toString() { |
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return (compressed ? "NarrowOop" : getJavaKind().getJavaName()) + "[" + runtime().reflection.formatString(this) + "]"; |
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} |
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public JavaConstant readFieldValue(HotSpotResolvedJavaField field, boolean isVolatile) { |
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return runtime().reflection.readFieldValue(this, field, isVolatile); |
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} |
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public ResolvedJavaType asJavaType() { |
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return runtime().reflection.asJavaType(this); |
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} |
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} |