| /* |
| * Copyright (c) 2014, 2018, 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 vm.mlvm.cp.share; |
| |
| import jdk.internal.org.objectweb.asm.ClassWriter; |
| import jdk.internal.org.objectweb.asm.ClassWriterExt; |
| import jdk.internal.org.objectweb.asm.Handle; |
| import jdk.internal.org.objectweb.asm.MethodVisitor; |
| import jdk.internal.org.objectweb.asm.Opcodes; |
| import jdk.internal.org.objectweb.asm.Type; |
| |
| import vm.mlvm.share.ClassfileGenerator; |
| import vm.mlvm.share.Env; |
| |
| public class GenManyIndyCorrectBootstrap extends GenFullCP { |
| |
| /** |
| * Generates a class file and writes it to a file |
| * @see vm.mlvm.share.ClassfileGenerator |
| * @param args Parameters for ClassfileGenerator.main() method |
| */ |
| public static void main(String[] args) { |
| ClassfileGenerator.main(args); |
| } |
| |
| /** |
| * Creates static init method, which constructs a call site object, which refers to the target method |
| * and invokes Dummy.setMH() on this call site |
| * @param cw Class writer object |
| */ |
| @Override |
| protected void createClassInitMethod(ClassWriter cw) { |
| MethodVisitor mw = cw.visitMethod( |
| Opcodes.ACC_PUBLIC + Opcodes.ACC_STATIC, |
| STATIC_INIT_METHOD_NAME, INIT_METHOD_SIGNATURE, |
| null, |
| new String[0]); |
| |
| mw.visitMethodInsn(Opcodes.INVOKESTATIC, JLI_METHODHANDLES, "lookup", "()" + fd(JLI_METHODHANDLES_LOOKUP)); |
| mw.visitLdcInsn(Type.getObjectType(fullClassName)); |
| mw.visitLdcInsn(TARGET_METHOD_NAME); |
| mw.visitLdcInsn(TARGET_METHOD_SIGNATURE); |
| mw.visitLdcInsn(Type.getObjectType(fullClassName)); |
| mw.visitMethodInsn(Opcodes.INVOKEVIRTUAL, JL_CLASS, |
| "getClassLoader", "()" + fd(JL_CLASSLOADER)); |
| mw.visitMethodInsn(Opcodes.INVOKESTATIC, JLI_METHODTYPE, |
| "fromMethodDescriptorString", "(" + fd(JL_STRING) + fd(JL_CLASSLOADER) + ")" + fd(JLI_METHODTYPE)); |
| mw.visitMethodInsn(Opcodes.INVOKEVIRTUAL, JLI_METHODHANDLES_LOOKUP, |
| "findStatic", "(" + fd(JL_CLASS) + fd(JL_STRING) + fd(JLI_METHODTYPE) + ")" + fd(JLI_METHODHANDLE)); |
| mw.visitMethodInsn(Opcodes.INVOKESTATIC, NEW_INVOKE_SPECIAL_CLASS_NAME, |
| "setMH", "(" + fd(JLI_METHODHANDLE) + ")V"); |
| |
| finishMethodCode(mw); |
| } |
| |
| /** |
| * Disables invoke dynamic CP entry caching and generate default common data |
| * @param cw Class writer object |
| */ |
| @Override |
| protected void generateCommonData(ClassWriterExt cw) { |
| cw.setCacheInvokeDynamic(false); |
| super.generateCommonData(cw); |
| } |
| |
| /** |
| * Generates an invokedynamic instruction (plus CP entry) |
| * which has a valid reference kind in the CP method handle entry for the bootstrap method |
| * @param cw Class writer object |
| * @param mw Method writer object |
| */ |
| @Override |
| protected void generateCPEntryData(ClassWriter cw, MethodVisitor mw) { |
| Handle bsm; |
| if (Env.getRNG().nextBoolean()) { |
| bsm = new Handle(Opcodes.H_NEWINVOKESPECIAL, |
| NEW_INVOKE_SPECIAL_CLASS_NAME, |
| INIT_METHOD_NAME, |
| NEW_INVOKE_SPECIAL_BOOTSTRAP_METHOD_SIGNATURE); |
| } else { |
| bsm = new Handle(Opcodes.H_INVOKESTATIC, |
| this.fullClassName, |
| BOOTSTRAP_METHOD_NAME, |
| BOOTSTRAP_METHOD_SIGNATURE); |
| } |
| mw.visitInvokeDynamicInsn(TARGET_METHOD_NAME, |
| TARGET_METHOD_SIGNATURE, |
| bsm); |
| } |
| } |