190 lines
7.6 KiB
Java
190 lines
7.6 KiB
Java
/*
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* Copyright (c) 2013, 2024, 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.
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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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* @test
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* @bug 8027232
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* @library /test/lib/
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* @modules jdk.zipfs
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* @enablePreview
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* @compile LambdaAsm.java
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* @run main/othervm LambdaAsm
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* @summary ensures that j.l.i.InvokerByteCodeGenerator and Class-File API
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* generate bytecodes with correct constant pool references
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*/
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import java.io.IOException;
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import java.lang.classfile.Attributes;
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import java.lang.classfile.ClassFile;
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import java.lang.classfile.ClassModel;
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import java.lang.classfile.Opcode;
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import java.lang.classfile.attribute.CodeAttribute;
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import java.lang.classfile.constantpool.ConstantPool;
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import java.lang.classfile.constantpool.MethodRefEntry;
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import java.lang.classfile.instruction.InvokeInstruction;
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import java.lang.constant.ClassDesc;
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import java.lang.constant.MethodTypeDesc;
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import java.nio.charset.Charset;
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import java.nio.file.Files;
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import java.util.ArrayList;
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import java.nio.file.DirectoryStream;
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import java.nio.file.Path;
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import jdk.test.lib.compiler.CompilerUtils;
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import jdk.test.lib.process.OutputAnalyzer;
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import static java.lang.constant.ConstantDescs.*;
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import static java.lang.classfile.ClassFile.*;
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import static java.nio.file.Files.*;
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import static jdk.test.lib.process.ProcessTools.*;
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public class LambdaAsm {
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static final Path DUMP_LAMBDA_PROXY_CLASS_FILES = Path.of("DUMP_LAMBDA_PROXY_CLASS_FILES");
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static final Path SRC = Path.of("src");
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static final Path CLASSES = Path.of("classes");
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static void init() throws Exception {
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emitCode();
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CompilerUtils.compile(SRC, CLASSES);
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OutputAnalyzer outputAnalyzer = executeProcess(createTestJavaProcessBuilder(
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"-Djdk.invoke.LambdaMetafactory.dumpProxyClassFiles=true",
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"-cp", CLASSES.toString(), "A"));
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outputAnalyzer.shouldHaveExitValue(0);
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}
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static void emitCode() throws IOException {
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ArrayList<String> scratch = new ArrayList<>();
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scratch.add("import java.util.function.*;");
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scratch.add("class A {");
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scratch.add(" interface I {");
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scratch.add(" default Supplier<Integer> a() { return () -> 1; }");
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scratch.add(" default Supplier<Integer> b(int i) { return () -> i; }");
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scratch.add(" default Supplier<Integer> c(int i) { return () -> m(i); }");
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scratch.add(" int m(int i);");
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scratch.add(" static Integer d() { return 0; }");
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scratch.add(" }");
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scratch.add(" static class C implements I {");
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scratch.add(" public int m(int i) { return i;}");
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scratch.add(" }");
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scratch.add(" public static void main(String[] args) {");
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scratch.add(" I i = new C();");
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scratch.add(" i.a();");
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scratch.add(" i.b(1);");
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scratch.add(" i.c(1);");
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scratch.add(" I.d();");
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scratch.add(" }");
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scratch.add("}");
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Path testFile = SRC.resolve("A.java");
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Files.createDirectories(SRC);
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Files.write(testFile, scratch, Charset.defaultCharset());
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}
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static void checkMethod(String cname, String mname, ConstantPool cp,
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CodeAttribute code) throws IllegalArgumentException {
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for (var inst : code) {
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if (inst instanceof InvokeInstruction inv && (inv.opcode() == Opcode.INVOKESPECIAL
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|| inv.opcode() == Opcode.INVOKEINTERFACE)) {
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var ref = inv.method();
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System.out.println("Verifying " + cname + ":" + mname +
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" instruction:" + inv.opcode() + " index @" + ref.index());
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if (ref instanceof MethodRefEntry) {
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throw new RuntimeException("unexpected CP type expected "
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+ "InterfaceMethodRef, got MethodRef, " + cname
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+ ", " + mname);
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}
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}
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}
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}
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static int checkMethod(ClassModel cf, String mthd) throws Exception {
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if (cf.majorVersion() < 52) {
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throw new RuntimeException("unexpected class file version, in "
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+ cf.thisClass().asInternalName() + "expected 52, got "
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+ cf.majorVersion());
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}
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int count = 0;
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for (var m : cf.methods()) {
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String mname = m.methodName().stringValue();
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if (mname.equals(mthd)) {
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for (var a : m.findAttributes(Attributes.code())) {
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count++;
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checkMethod(cf.thisClass().asInternalName(), mname,
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cf.constantPool(), a);
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}
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}
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}
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return count;
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}
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static void verifyInvokerBytecodeGenerator() throws Exception {
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int count = 0;
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int mcount = 0;
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try (DirectoryStream<Path> ds = newDirectoryStream(DUMP_LAMBDA_PROXY_CLASS_FILES,
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// filter in lambda proxy classes
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"A$I$$Lambda.*.class")) {
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for (Path p : ds) {
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System.out.println(p.toFile());
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ClassModel cm = ClassFile.of().parse(p);
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// Check those methods implementing Supplier.get
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mcount += checkMethod(cm, "get");
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count++;
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}
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}
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if (count < 3) {
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throw new RuntimeException("unexpected number of files, "
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+ "expected atleast 3 files, but got only " + count);
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}
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if (mcount < 3) {
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throw new RuntimeException("unexpected number of methods, "
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+ "expected atleast 3 methods, but got only " + mcount);
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}
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}
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static void verifyASM() throws Exception {
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var functionDesc = ClassDesc.ofInternalName("java/util/function/Function");
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byte[] carray = ClassFile.of().build(ClassDesc.of("X"), clb -> clb
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.withVersion(JAVA_8_VERSION, 0)
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.withFlags(ACC_PUBLIC)
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.withSuperclass(CD_Object)
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.withMethodBody("foo", MTD_void, ACC_STATIC, cob -> cob
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.invokestatic(functionDesc, "identity", MethodTypeDesc.of(functionDesc), true)
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)
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);
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// for debugging
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// write((new File("X.class")).toPath(), carray, CREATE, TRUNCATE_EXISTING);
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// verify using javap/classfile reader
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ClassModel cm = ClassFile.of().parse(carray);
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int mcount = checkMethod(cm, "foo");
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if (mcount < 1) {
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throw new RuntimeException("unexpected method count, expected 1" +
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"but got " + mcount);
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}
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}
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public static void main(String... args) throws Exception {
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init();
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verifyInvokerBytecodeGenerator();
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verifyASM();
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}
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}
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