332 lines
12 KiB
Java
332 lines
12 KiB
Java
/*
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* Copyright (c) 2019, 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 8222949
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* @summary add condy support to javac's pool API
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* @library /tools/javac/lib
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* @enablePreview
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* @modules java.base/jdk.internal.classfile.impl
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* jdk.compiler/com.sun.tools.javac.api
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* jdk.compiler/com.sun.tools.javac.code
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* jdk.compiler/com.sun.tools.javac.file
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* jdk.compiler/com.sun.tools.javac.jvm
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* jdk.compiler/com.sun.tools.javac.tree
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* jdk.compiler/com.sun.tools.javac.util
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* @build combo.ComboTestHelper
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* @run main TestConstantDynamic
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*/
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import java.io.IOException;
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import java.io.InputStream;
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import javax.lang.model.type.TypeKind;
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import javax.tools.JavaFileObject;
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import com.sun.source.tree.*;
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import com.sun.source.util.TaskEvent;
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import com.sun.source.util.TaskListener;
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import com.sun.source.util.TreeScanner;
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import java.lang.classfile.*;
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import java.lang.classfile.attribute.*;
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import java.lang.classfile.constantpool.*;
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import java.lang.classfile.instruction.ConstantInstruction;
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import com.sun.tools.javac.code.Symbol;
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import com.sun.tools.javac.code.Symbol.*;
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import com.sun.tools.javac.code.Symtab;
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import com.sun.tools.javac.code.Type;
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import com.sun.tools.javac.code.Type.ClassType;
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import com.sun.tools.javac.code.Type.MethodType;
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import com.sun.tools.javac.code.Types;
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import com.sun.tools.javac.jvm.PoolConstant.LoadableConstant;
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import com.sun.tools.javac.tree.JCTree.*;
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import com.sun.tools.javac.util.Name;
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import com.sun.tools.javac.util.Names;
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import com.sun.tools.javac.util.List;
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import combo.ComboParameter;
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import combo.ComboTestHelper;
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import combo.ComboInstance;
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import combo.ComboTask.Result;
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import static java.lang.invoke.MethodHandleInfo.REF_invokeStatic;
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public class TestConstantDynamic extends ComboInstance<TestConstantDynamic> {
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enum ConstantType implements ComboParameter {
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STRING("String", "Ljava/lang/String;", Opcode.LDC),
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CLASS("Class<?>", "Ljava/lang/Class;", Opcode.LDC),
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INTEGER("int", "I", Opcode.LDC),
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LONG("long", "J", Opcode.LDC2_W),
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FLOAT("float", "F", Opcode.LDC),
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DOUBLE("double", "D", Opcode.LDC2_W),
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METHOD_HANDLE("MethodHandle", "Ljava/lang/invoke/MethodHandle;", Opcode.LDC),
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METHOD_TYPE("MethodType", "Ljava/lang/invoke/MethodType;", Opcode.LDC);
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String sourceTypeStr;
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String bytecodeTypeStr;
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Opcode opcode;
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ConstantType(String sourceTypeStr, String bytecodeTypeStr, Opcode opcode) {
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this.sourceTypeStr = sourceTypeStr;
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this.bytecodeTypeStr = bytecodeTypeStr;
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this.opcode = opcode;
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}
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@Override
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public String expand(String optParameter) {
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return sourceTypeStr;
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}
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}
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enum Value implements ComboParameter {
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STRING("\"Hello!\""),
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CLASS("null"),
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INTEGER("1"),
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LONG("1L"),
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FLOAT("1.0f"),
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DOUBLE("1.0"),
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METHOD_HANDLE("null"),
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METHOD_TYPE("null");
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String value;
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Value(String value) {
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this.value = value;
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}
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@Override
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public String expand(String optParameter) {
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return value;
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}
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}
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public static void main(String... args) throws Exception {
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new ComboTestHelper<TestConstantDynamic>()
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.withFilter(TestConstantDynamic::redundantTestFilter)
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.withDimension("TYPE", (x, type) -> x.type = type, ConstantType.values())
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.withDimension("VALUE", (x, value) -> x.value = value, Value.values())
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.run(TestConstantDynamic::new);
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}
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ConstantType type;
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Value value;
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boolean redundantTestFilter() {
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return type.name().equals(value.name());
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}
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final String source_template =
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"import java.lang.invoke.*;\n" +
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"import java.lang.invoke.MethodHandles.*;\n" +
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"class Test {\n" +
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" static final #{TYPE} f = #{VALUE};\n" +
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" static #{TYPE} bsm(MethodHandles.Lookup lookup, String name, Class<?> type) {\n" +
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" return f;\n" +
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" }\n" +
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" static void test() {\n" +
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" #{TYPE} i = f;\n" +
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" }\n" +
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"}";
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@Override
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public void doWork() throws IOException {
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newCompilationTask()
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.withOption("-g")
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.withSourceFromTemplate(source_template)
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.withListenerFactory(context -> {
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Symtab syms = Symtab.instance(context);
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Names names = Names.instance(context);
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Types types = Types.instance(context);
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return new Condifier(syms, names, types);
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})
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.generate(this::verifyBytecode);
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}
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void verifyBytecode(Result<Iterable<? extends JavaFileObject>> res) {
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if (res.hasErrors()) {
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fail("Diags found when compiling instance: " + res.compilationInfo());
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return;
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}
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try (InputStream is = res.get().iterator().next().openInputStream()){
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ClassModel cf = ClassFile.of().parse(is.readAllBytes());
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MethodModel testMethod = null;
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for (MethodModel m : cf.methods()) {
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if (m.methodName().equalsString("test")) {
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testMethod = m;
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break;
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}
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}
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if (testMethod == null) {
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fail("Test method not found");
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return;
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}
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CodeAttribute ea = testMethod.findAttribute(Attributes.code()).orElse(null);
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if (ea == null) {
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fail("Code attribute for test() method not found");
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return;
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}
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BootstrapMethodEntry bootstrapMethodEntry = null;
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for (CodeElement i : ea.elementList()) {
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if (i instanceof ConstantInstruction.LoadConstantInstruction lci) {
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ConstantDynamicEntry condyInfo = (ConstantDynamicEntry)lci.constantEntry();
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bootstrapMethodEntry = condyInfo.bootstrap();
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System.out.println("condyInfo.getNameAndTypeInfo().getType() " + condyInfo.type().stringValue());
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if (!condyInfo.type().equalsString(type.bytecodeTypeStr)) {
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fail("type mismatch for ConstantDynamicEntry");
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return;
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}
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if (lci.opcode() != type.opcode) {
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fail("unexpected opcode for constant value: " + lci.opcode());
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return;
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}
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}
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}
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if (bootstrapMethodEntry == null) {
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fail("Missing constantdynamic in generated code");
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return;
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}
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BootstrapMethodsAttribute bsm_attr = cf.findAttribute(Attributes.bootstrapMethods()).orElseThrow();
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if (bsm_attr.bootstrapMethods().size() != 1) {
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fail("Bad number of method specifiers " +
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"in BootstrapMethods attribute");
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return;
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}
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BootstrapMethodEntry bsm_spec =
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bsm_attr.bootstrapMethods().getFirst();
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MethodHandleEntry bsm_handle = bsm_spec.bootstrapMethod();
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if (bsm_handle.kind() != REF_invokeStatic) {
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fail("Bad kind on boostrap method handle");
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return;
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}
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MemberRefEntry bsm_ref = bsm_handle.reference();
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if (!bsm_ref.owner().name().equalsString("Test")) {
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fail("Bad owner of boostrap method");
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return;
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}
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if (!bsm_ref.name().equalsString("bsm")) {
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fail("Bad boostrap method name");
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return;
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}
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if (!bsm_ref.type().equalsString(asBSMSignatureString())) {
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fail("Bad boostrap method type" +
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bsm_ref.type() + " " +
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asBSMSignatureString());
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return;
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}
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LineNumberTableAttribute lnt = ea.findAttribute(Attributes.lineNumberTable()).orElse(null);
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if (lnt == null) {
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fail("No LineNumberTable attribute");
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return;
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}
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if (lnt.lineNumbers().size() != 2) {
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fail("Wrong number of entries in LineNumberTable");
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}
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} catch (Exception e) {
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e.printStackTrace();
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fail("error reading classfile: " + res.compilationInfo());
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}
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}
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String asBSMSignatureString() {
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StringBuilder buf = new StringBuilder();
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buf.append("(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/Class;");
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buf.append(")" + type.bytecodeTypeStr);
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return buf.toString();
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}
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class Condifier extends TreeScanner<Void, Void> implements TaskListener {
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MethodHandleSymbol bsm;
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Symtab syms;
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Names names;
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Types types;
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Condifier(Symtab syms, Names names, Types types) {
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this.syms = syms;
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this.names = names;
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this.types = types;
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}
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@Override
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public void started(TaskEvent e) {
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//do nothing
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}
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@Override
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public void finished(TaskEvent e) {
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if (e.getKind() == TaskEvent.Kind.ANALYZE) {
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scan(e.getCompilationUnit(), null);
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}
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}
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@Override
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public Void visitVariable(VariableTree node, Void p) {
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super.visitVariable(node, p);
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JCVariableDecl tree = (JCVariableDecl)node;
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VarSymbol v = tree.sym;
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if (tree.init != null && v.name.toString().equals("i")) {
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List<Type> bsm_staticArgs = List.of(syms.methodHandleLookupType,
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syms.stringType,
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syms.classType);
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Name bsmName = names.fromString("bsm");
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Symbol.DynamicVarSymbol dynSym = new Symbol.DynamicVarSymbol(bsmName,
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syms.noSymbol,
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bsm,
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v.type,
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new LoadableConstant[0]);
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((JCIdent)tree.init).sym = dynSym;
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((JCIdent)tree.init).name = bsmName;
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}
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return null;
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}
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@Override
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public Void visitMethod(MethodTree node, Void p) {
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super.visitMethod(node, p);
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if (node.getName().toString().equals("bsm")) {
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bsm = ((JCMethodDecl)node).sym.asHandle();
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}
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return null;
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}
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}
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}
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