| /* |
| * Copyright (c) 2010, 2017, 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. |
| * |
| * 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 test.java.lang.invoke.lib; |
| |
| import jdk.experimental.bytecode.BasicClassBuilder; |
| import jdk.experimental.bytecode.BasicTypeHelper; |
| import jdk.experimental.bytecode.Flag; |
| import jdk.experimental.bytecode.PoolHelper; |
| import jdk.experimental.bytecode.TypedCodeBuilder; |
| |
| import java.io.FileOutputStream; |
| import java.lang.invoke.MethodHandle; |
| import java.lang.invoke.MethodHandles; |
| import java.lang.invoke.MethodType; |
| import java.util.concurrent.atomic.AtomicInteger; |
| import java.util.function.Consumer; |
| import java.util.function.Function; |
| |
| import static java.lang.invoke.MethodType.fromMethodDescriptorString; |
| import static java.lang.invoke.MethodType.methodType; |
| |
| public class InstructionHelper { |
| |
| static final BasicTypeHelper BTH = new BasicTypeHelper(); |
| |
| static final AtomicInteger COUNT = new AtomicInteger(); |
| |
| static BasicClassBuilder classBuilder(MethodHandles.Lookup l) { |
| String className = l.lookupClass().getCanonicalName().replace('.', '/') + "$Code_" + COUNT.getAndIncrement(); |
| return new BasicClassBuilder(className, 55, 0) |
| .withSuperclass("java/lang/Object") |
| .withMethod("<init>", "()V", M -> |
| M.withFlags(Flag.ACC_PUBLIC) |
| .withCode(TypedCodeBuilder::new, C -> |
| C.aload_0().invokespecial("java/lang/Object", "<init>", "()V", false).return_() |
| )); |
| } |
| |
| public static MethodHandle invokedynamic(MethodHandles.Lookup l, |
| String name, MethodType type, |
| String bsmMethodName, MethodType bsmType, |
| Consumer<PoolHelper.StaticArgListBuilder<String, String, byte[]>> staticArgs) throws Exception { |
| byte[] byteArray = classBuilder(l) |
| .withMethod("m", type.toMethodDescriptorString(), M -> |
| M.withFlags(Flag.ACC_PUBLIC, Flag.ACC_STATIC) |
| .withCode(TypedCodeBuilder::new, |
| C -> { |
| for (int i = 0; i < type.parameterCount(); i++) { |
| C.load(BTH.tag(cref(type.parameterType(i))), i); |
| } |
| C.invokedynamic(name, type.toMethodDescriptorString(), |
| csym(l.lookupClass()), bsmMethodName, bsmType.toMethodDescriptorString(), |
| staticArgs); |
| C.return_(BTH.tag(cref(type.returnType()))); |
| } |
| )) |
| .build(); |
| Class<?> gc = l.defineClass(byteArray); |
| return l.findStatic(gc, "m", type); |
| } |
| |
| public static MethodHandle ldcMethodHandle(MethodHandles.Lookup l, |
| int refKind, Class<?> owner, String name, MethodType type) throws Exception { |
| return ldc(l, MethodHandle.class, |
| P -> P.putHandle(refKind, csym(owner), name, type.toMethodDescriptorString())); |
| } |
| |
| public static MethodHandle ldcDynamicConstant(MethodHandles.Lookup l, |
| String name, Class<?> type, |
| String bsmMethodName, MethodType bsmType, |
| Consumer<PoolHelper.StaticArgListBuilder<String, String, byte[]>> staticArgs) throws Exception { |
| return ldcDynamicConstant(l, name, type, l.lookupClass(), bsmMethodName, bsmType, staticArgs); |
| } |
| |
| public static MethodHandle ldcDynamicConstant(MethodHandles.Lookup l, |
| String name, Class<?> type, |
| Class<?> bsmClass, String bsmMethodName, MethodType bsmType, |
| Consumer<PoolHelper.StaticArgListBuilder<String, String, byte[]>> staticArgs) throws Exception { |
| return ldcDynamicConstant(l, name, cref(type), csym(bsmClass), bsmMethodName, bsmType.toMethodDescriptorString(), staticArgs); |
| } |
| |
| public static MethodHandle ldcDynamicConstant(MethodHandles.Lookup l, |
| String name, String type, |
| String bsmMethodName, String bsmType, |
| Consumer<PoolHelper.StaticArgListBuilder<String, String, byte[]>> staticArgs) throws Exception { |
| return ldcDynamicConstant(l, name, type, csym(l.lookupClass()), bsmMethodName, bsmType, staticArgs); |
| } |
| |
| public static MethodHandle ldcDynamicConstant(MethodHandles.Lookup l, |
| String name, String type, |
| String bsmClass, String bsmMethodName, String bsmType, |
| Consumer<PoolHelper.StaticArgListBuilder<String, String, byte[]>> staticArgs) throws Exception { |
| return ldc(l, type, |
| P -> P.putDynamicConstant(name, type, |
| bsmClass, bsmMethodName, bsmType, |
| staticArgs)); |
| } |
| |
| public static MethodHandle ldc(MethodHandles.Lookup l, |
| Class<?> type, |
| Function<PoolHelper<String, String, byte[]>, Integer> poolFunc) throws Exception { |
| return ldc(l, cref(type), poolFunc); |
| } |
| |
| public static MethodHandle ldc(MethodHandles.Lookup l, |
| String type, |
| Function<PoolHelper<String, String, byte[]>, Integer> poolFunc) throws Exception { |
| String methodType = "()" + type; |
| byte[] byteArray = classBuilder(l) |
| .withMethod("m", "()" + type, M -> |
| M.withFlags(Flag.ACC_PUBLIC, Flag.ACC_STATIC) |
| .withCode(TypedCodeBuilder::new, |
| C -> { |
| C.ldc(null, (P, v) -> poolFunc.apply(P)); |
| C.return_(BTH.tag(type)); |
| } |
| )) |
| .build(); |
| Class<?> gc = l.defineClass(byteArray); |
| return l.findStatic(gc, "m", fromMethodDescriptorString(methodType, l.lookupClass().getClassLoader())); |
| } |
| |
| public static String csym(Class<?> c) { |
| return c.getCanonicalName().replace('.', '/'); |
| } |
| |
| public static String cref(Class<?> c) { |
| return methodType(c).toMethodDescriptorString().substring(2); |
| } |
| } |