OpenJDK / jdk / hs
changeset 40259:439673b634a9
8163814: JDK build has been failing after 8163373
Reviewed-by: mchung
author | redestad |
---|---|
date | Wed, 10 Aug 2016 22:49:05 +0200 |
parents | e6ba2e5c7a29 |
children | 4e69b50ccd97 |
files | jdk/src/java.base/share/classes/java/lang/invoke/GenerateJLIClassesHelper.java |
diffstat | 1 files changed, 85 insertions(+), 0 deletions(-) [+] |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/jdk/src/java.base/share/classes/java/lang/invoke/GenerateJLIClassesHelper.java Wed Aug 10 22:49:05 2016 +0200 @@ -0,0 +1,85 @@ +/* + * Copyright (c) 2016, Oracle and/or its affiliates. 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. Oracle designates this + * particular file as subject to the "Classpath" exception as provided + * by Oracle in the LICENSE file that accompanied this code. + * + * 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +package java.lang.invoke; + +import java.util.Map; +import jdk.internal.org.objectweb.asm.ClassWriter; +import jdk.internal.org.objectweb.asm.Opcodes; + +/** + * Helper class to assist the GenerateJLIClassesPlugin to get access to + * generate classes ahead of time. + */ +class GenerateJLIClassesHelper { + + static byte[] generateDMHClassBytes(String className, + MethodType[] methodTypes, int[] types) { + LambdaForm[] forms = new LambdaForm[methodTypes.length]; + for (int i = 0; i < forms.length; i++) { + forms[i] = DirectMethodHandle.makePreparedLambdaForm(methodTypes[i], + types[i]); + methodTypes[i] = forms[i].methodType(); + } + return generateCodeBytesForLFs(className, forms, methodTypes); + } + + /* + * Generate customized code for a set of LambdaForms of specified types into + * a class with a specified name. + */ + private static byte[] generateCodeBytesForLFs(String className, + LambdaForm[] forms, MethodType[] types) { + assert(forms.length == types.length); + + ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS + ClassWriter.COMPUTE_FRAMES); + cw.visit(Opcodes.V1_8, Opcodes.ACC_PRIVATE + Opcodes.ACC_FINAL + Opcodes.ACC_SUPER, + className, null, InvokerBytecodeGenerator.INVOKER_SUPER_NAME, null); + cw.visitSource(className.substring(className.lastIndexOf('/') + 1), null); + for (int i = 0; i < forms.length; i++) { + InvokerBytecodeGenerator g + = new InvokerBytecodeGenerator(className, forms[i], types[i]); + g.setClassWriter(cw); + g.addMethod(); + } + return cw.toByteArray(); + } + + static Map.Entry<String, byte[]> generateConcreteBMHClassBytes( + final String types) { + for (char c : types.toCharArray()) { + if ("LIJFD".indexOf(c) < 0) { + throw new IllegalArgumentException("All characters must " + + "correspond to a basic field type: LIJFD"); + } + } + String shortTypes = LambdaForm.shortenSignature(types); + final String className = + BoundMethodHandle.Factory.speciesInternalClassName(shortTypes); + return Map.entry(className, + BoundMethodHandle.Factory.generateConcreteBMHClassBytes( + shortTypes, types, className)); + } +}