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