author | redestad |
Thu, 19 Sep 2019 23:38:50 +0200 | |
changeset 58238 | 3386b9a8ef4d |
parent 57939 | e8ba7e4f4190 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2016, 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. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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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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||
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package java.lang.invoke; |
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import jdk.internal.org.objectweb.asm.ClassWriter; |
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import jdk.internal.org.objectweb.asm.Opcodes; |
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import sun.invoke.util.Wrapper; |
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import java.util.ArrayList; |
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import java.util.HashSet; |
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import java.util.Map; |
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import static java.lang.invoke.MethodTypeForm.LF_INVINTERFACE; |
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import static java.lang.invoke.MethodTypeForm.LF_INVVIRTUAL; |
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/** |
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* Helper class to assist the GenerateJLIClassesPlugin to get access to |
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* generate classes ahead of time. |
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*/ |
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class GenerateJLIClassesHelper { |
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static byte[] generateBasicFormsClassBytes(String className) { |
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ArrayList<LambdaForm> forms = new ArrayList<>(); |
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ArrayList<String> names = new ArrayList<>(); |
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HashSet<String> dedupSet = new HashSet<>(); |
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for (LambdaForm.BasicType type : LambdaForm.BasicType.values()) { |
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LambdaForm zero = LambdaForm.zeroForm(type); |
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String name = zero.kind.defaultLambdaName |
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+ "_" + zero.returnType().basicTypeChar(); |
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if (dedupSet.add(name)) { |
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names.add(name); |
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forms.add(zero); |
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} |
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LambdaForm identity = LambdaForm.identityForm(type); |
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name = identity.kind.defaultLambdaName |
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+ "_" + identity.returnType().basicTypeChar(); |
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if (dedupSet.add(name)) { |
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names.add(name); |
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forms.add(identity); |
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} |
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} |
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return generateCodeBytesForLFs(className, |
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names.toArray(new String[0]), |
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forms.toArray(new LambdaForm[0])); |
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} |
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static byte[] generateDirectMethodHandleHolderClassBytes(String className, |
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MethodType[] methodTypes, int[] types) { |
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ArrayList<LambdaForm> forms = new ArrayList<>(); |
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ArrayList<String> names = new ArrayList<>(); |
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for (int i = 0; i < methodTypes.length; i++) { |
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// invokeVirtual and invokeInterface must have a leading Object |
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// parameter, i.e., the receiver |
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if (types[i] == LF_INVVIRTUAL || types[i] == LF_INVINTERFACE) { |
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if (methodTypes[i].parameterCount() < 1 || |
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methodTypes[i].parameterType(0) != Object.class) { |
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throw new InternalError("Invalid method type for " + |
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(types[i] == LF_INVVIRTUAL ? "invokeVirtual" : "invokeInterface") + |
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" DMH, needs at least two leading reference arguments: " + |
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methodTypes[i]); |
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} |
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} |
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LambdaForm form = DirectMethodHandle.makePreparedLambdaForm(methodTypes[i], types[i]); |
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forms.add(form); |
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names.add(form.kind.defaultLambdaName); |
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} |
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for (Wrapper wrapper : Wrapper.values()) { |
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if (wrapper == Wrapper.VOID) { |
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continue; |
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} |
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for (byte b = DirectMethodHandle.AF_GETFIELD; b < DirectMethodHandle.AF_LIMIT; b++) { |
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int ftype = DirectMethodHandle.ftypeKind(wrapper.primitiveType()); |
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LambdaForm form = DirectMethodHandle |
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.makePreparedFieldLambdaForm(b, /*isVolatile*/false, ftype); |
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if (form.kind != LambdaForm.Kind.GENERIC) { |
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forms.add(form); |
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names.add(form.kind.defaultLambdaName); |
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} |
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// volatile |
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form = DirectMethodHandle |
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.makePreparedFieldLambdaForm(b, /*isVolatile*/true, ftype); |
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if (form.kind != LambdaForm.Kind.GENERIC) { |
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forms.add(form); |
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names.add(form.kind.defaultLambdaName); |
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} |
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} |
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} |
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return generateCodeBytesForLFs(className, |
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names.toArray(new String[0]), |
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forms.toArray(new LambdaForm[0])); |
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} |
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static byte[] generateDelegatingMethodHandleHolderClassBytes(String className, |
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MethodType[] methodTypes) { |
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HashSet<MethodType> dedupSet = new HashSet<>(); |
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ArrayList<LambdaForm> forms = new ArrayList<>(); |
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ArrayList<String> names = new ArrayList<>(); |
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for (int i = 0; i < methodTypes.length; i++) { |
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// generate methods representing the DelegatingMethodHandle |
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if (dedupSet.add(methodTypes[i])) { |
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// reinvokers are variant with the associated SpeciesData |
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// and shape of the target LF, but we can easily pregenerate |
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// the basic reinvokers associated with Species_L. Ultimately we |
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// may want to consider pregenerating more of these, which will |
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// require an even more complex naming scheme |
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LambdaForm reinvoker = makeReinvokerFor(methodTypes[i]); |
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forms.add(reinvoker); |
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String speciesSig = BoundMethodHandle.speciesDataFor(reinvoker).key(); |
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assert(speciesSig.equals("L")); |
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names.add(reinvoker.kind.defaultLambdaName + "_" + speciesSig); |
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|
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LambdaForm delegate = makeDelegateFor(methodTypes[i]); |
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forms.add(delegate); |
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names.add(delegate.kind.defaultLambdaName); |
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} |
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} |
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return generateCodeBytesForLFs(className, |
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names.toArray(new String[0]), |
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forms.toArray(new LambdaForm[0])); |
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} |
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static byte[] generateInvokersHolderClassBytes(String className, |
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MethodType[] invokerMethodTypes, MethodType[] callSiteMethodTypes) { |
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|
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HashSet<MethodType> dedupSet = new HashSet<>(); |
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ArrayList<LambdaForm> forms = new ArrayList<>(); |
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ArrayList<String> names = new ArrayList<>(); |
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int[] types = { |
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MethodTypeForm.LF_EX_LINKER, |
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MethodTypeForm.LF_EX_INVOKER, |
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MethodTypeForm.LF_GEN_LINKER, |
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MethodTypeForm.LF_GEN_INVOKER |
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}; |
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|
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for (int i = 0; i < invokerMethodTypes.length; i++) { |
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// generate methods representing invokers of the specified type |
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if (dedupSet.add(invokerMethodTypes[i])) { |
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for (int type : types) { |
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LambdaForm invokerForm = Invokers.invokeHandleForm(invokerMethodTypes[i], |
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/*customized*/false, type); |
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forms.add(invokerForm); |
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names.add(invokerForm.kind.defaultLambdaName); |
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} |
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} |
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} |
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|
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dedupSet = new HashSet<>(); |
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for (int i = 0; i < callSiteMethodTypes.length; i++) { |
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// generate methods representing invokers of the specified type |
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if (dedupSet.add(callSiteMethodTypes[i])) { |
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LambdaForm callSiteForm = Invokers.callSiteForm(callSiteMethodTypes[i], true); |
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forms.add(callSiteForm); |
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names.add(callSiteForm.kind.defaultLambdaName); |
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|
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LambdaForm methodHandleForm = Invokers.callSiteForm(callSiteMethodTypes[i], false); |
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forms.add(methodHandleForm); |
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names.add(methodHandleForm.kind.defaultLambdaName); |
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} |
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} |
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return generateCodeBytesForLFs(className, |
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names.toArray(new String[0]), |
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forms.toArray(new LambdaForm[0])); |
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} |
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|
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/* |
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* Generate customized code for a set of LambdaForms of specified types into |
|
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* a class with a specified name. |
|
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*/ |
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private static byte[] generateCodeBytesForLFs(String className, |
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String[] names, LambdaForm[] forms) { |
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|
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ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS + ClassWriter.COMPUTE_FRAMES); |
|
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cw.visit(Opcodes.V1_8, Opcodes.ACC_PRIVATE + Opcodes.ACC_FINAL + Opcodes.ACC_SUPER, |
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className, null, InvokerBytecodeGenerator.INVOKER_SUPER_NAME, null); |
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cw.visitSource(className.substring(className.lastIndexOf('/') + 1), null); |
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|
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for (int i = 0; i < forms.length; i++) { |
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addMethod(className, names[i], forms[i], |
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forms[i].methodType(), cw); |
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} |
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return cw.toByteArray(); |
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} |
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private static void addMethod(String className, String methodName, LambdaForm form, |
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MethodType type, ClassWriter cw) { |
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InvokerBytecodeGenerator g |
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= new InvokerBytecodeGenerator(className, methodName, form, type); |
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g.setClassWriter(cw); |
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g.addMethod(); |
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} |
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|
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private static LambdaForm makeReinvokerFor(MethodType type) { |
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MethodHandle emptyHandle = MethodHandles.empty(type); |
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return DelegatingMethodHandle.makeReinvokerForm(emptyHandle, |
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MethodTypeForm.LF_REBIND, |
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BoundMethodHandle.speciesData_L(), |
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BoundMethodHandle.speciesData_L().getterFunction(0)); |
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} |
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|
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private static LambdaForm makeDelegateFor(MethodType type) { |
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MethodHandle handle = MethodHandles.empty(type); |
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return DelegatingMethodHandle.makeReinvokerForm( |
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handle, |
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MethodTypeForm.LF_DELEGATE, |
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DelegatingMethodHandle.class, |
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DelegatingMethodHandle.NF_getTarget); |
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} |
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@SuppressWarnings({"rawtypes", "unchecked"}) |
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static Map.Entry<String, byte[]> generateConcreteBMHClassBytes(final String types) { |
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for (char c : types.toCharArray()) { |
239 |
if ("LIJFD".indexOf(c) < 0) { |
|
240 |
throw new IllegalArgumentException("All characters must " |
|
241 |
+ "correspond to a basic field type: LIJFD"); |
|
242 |
} |
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243 |
} |
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final BoundMethodHandle.SpeciesData species = BoundMethodHandle.SPECIALIZER.findSpecies(types); |
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final String className = species.speciesCode().getName(); |
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final ClassSpecializer.Factory factory = BoundMethodHandle.SPECIALIZER.factory(); |
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final byte[] code = factory.generateConcreteSpeciesCodeFile(className, species); |
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return Map.entry(className.replace('.', '/'), code); |
40259 | 249 |
} |
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250 |
|
40259 | 251 |
} |