/* * Copyright (c) 2013, 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. * * 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. /* * @test * @bug 8027232 * @summary ensures that j.l.i.InvokerByteCodeGenerator and ASM visitMethodInsn * generate bytecodes with correct constant pool references * @modules java.base/jdk.internal.org.objectweb.asm * jdk.jdeps/com.sun.tools.classfile * jdk.zipfs * @compile -XDignore.symbol.file LambdaAsm.java LUtils.java * @run main/othervm LambdaAsm import com.sun.tools.classfile.Attribute;import com.sun.tools.classfile.ClassFile;import com.sun.tools.classfile.Code_attribute;import com.sun.tools.classfile.ConstantPool;import com.sun.tools.classfile.ConstantPool.CPInfo;import com.sun.tools.classfile.Instruction;import com.sun.tools.classfile.Method;import java.io.ByteArrayInputStream;import java.io.File;import java.util.ArrayList;import java.nio.file.DirectoryStream;import java.nio.file.Path;import jdk.internal.org.objectweb.asm.ClassWriter;import jdk.internal.org.objectweb.asm.MethodVisitor;import static java.nio.file.Files.*;import static jdk.internal.org.objectweb.asm.Opcodes.*;public class LambdaAsm {static final File TestFile = new File("A.java" );static void init() {"-Djdk.internal.lambda.dumpProxyClasses=." ,"-cp" , "." , "A" );if (tr.exitValue != 0) {"Error: " + tr.toString());throw new RuntimeException("could not create proxy classes" );static void emitCode() {new ArrayList<>();"import java.util.function.*;" );"class A {" );" interface I {" );" default Supplier a() { return () -> 1; }" );" default Supplier b(int i) { return () -> i; }" );" default Supplier c(int i) { return () -> m(i); }" );" int m(int i);" );" static Integer d() { return 0; }" );" }" );" static class C implements I {" );" public int m(int i) { return i;}" );" }" );" public static void main(String[] args) {" );" I i = new C();" );" i.a();" );" i.b(1);" );" i.c(1);" );" I.d();" );" }" );"}" );static void checkMethod(String cname, String mname, ConstantPool cp,throws ConstantPool.InvalidIndex {for (Instruction i : code.getInstructions()) {if ("invokespecial" .equals(iname)"invokestatic" .equals(iname)) {int idx = i.getByte(2);"Verifying " + cname + ":" + mname +" instruction:" + iname + " index @" + idx);if (cpinfo instanceof ConstantPool.CONSTANT_Methodref_info) {throw new RuntimeException("unexpected CP type expected " "InterfaceMethodRef, got MethodRef, " + cname", " + mname);static int checkMethod(ClassFile cf, String mthd) throws Exception {if (cf.major_version < 52) {throw new RuntimeException("unexpected class file version, in " "expected 52, got " + cf.major_version);int count = 0;for (Method m : cf.methods) {if (mname.equals(mthd)) {for (Attribute a : m.attributes) {if ("Code" .equals(a.getName(cf.constant_pool))) {return count;static void verifyInvokerBytecodeGenerator() throws Exception {int count = 0;int mcount = 0;try (DirectoryStream<Path> ds = newDirectoryStream(new File("." ).toPath(),// filter in lambda proxy classes "A$I$$Lambda$*.class" )) {for (Path p : ds) {// Check those methods implementing Supplier.get "get" );if (count < 3) {throw new RuntimeException("unexpected number of files, " "expected atleast 3 files, but got only " + count);if (mcount < 3) {throw new RuntimeException("unexpected number of methods, " "expected atleast 3 methods, but got only " + mcount);static void verifyASM() throws Exception {new ClassWriter(0);"X" , null , "java/lang/Object" , null );"foo" ,"()V" , null , null );"java/util/function/Function.class" ,"identity" , "()Ljava/util/function/Function;" , true );RETURN );byte [] carray = cw.toByteArray();// for debugging // write((new File("X.class")).toPath(), carray, CREATE, TRUNCATE_EXISTING); // verify using javap/classfile reader new ByteArrayInputStream(carray));int mcount = checkMethod(cf, "foo" );if (mcount < 1) {throw new RuntimeException("unexpected method count, expected 1" +"but got " + mcount);public static void main(String... args) throws Exception {quality 87%
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