--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/test/tools/javac/lambda/ByteCodeTest.java Thu Sep 26 15:04:15 2013 -0700
@@ -0,0 +1,647 @@
+/*
+ * Copyright (c) 2013, 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 8011738
+ * @author sogoel
+ * @summary Code translation test for Lambda expressions, method references
+ * @run main ByteCodeTest
+ */
+
+import com.sun.tools.classfile.Attribute;
+import com.sun.tools.classfile.BootstrapMethods_attribute;
+import com.sun.tools.classfile.ClassFile;
+import com.sun.tools.classfile.ConstantPool;
+import com.sun.tools.classfile.ConstantPoolException;
+import com.sun.tools.classfile.ConstantPool.*;
+
+import java.io.BufferedWriter;
+import java.io.File;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+
+public class ByteCodeTest {
+
+ static boolean IS_DEBUG = false;
+ public static void main(String[] args) {
+ File classFile = null;
+ int err = 0;
+ boolean verifyResult = false;
+ for(TestCases tc : TestCases.values()) {
+ classFile = getCompiledFile(tc.name(), tc.srcCode);
+ if(classFile == null) { // either testFile or classFile was not created
+ err++;
+ } else {
+ verifyResult = verifyClassFileAttributes(classFile, tc);
+ if(!verifyResult)
+ System.out.println("Bootstrap class file attributes did not match for " + tc.name());
+ }
+ }
+ if(err > 0)
+ throw new RuntimeException("Found " + err + " found");
+ else
+ System.out.println("Test passed");
+ }
+
+ private static boolean verifyClassFileAttributes(File classFile, TestCases tc) {
+ ClassFile c = null;
+ try {
+ c = ClassFile.read(classFile);
+ } catch (IOException | ConstantPoolException e) {
+ e.printStackTrace();
+ }
+ ConstantPoolVisitor cpv = new ConstantPoolVisitor(c, c.constant_pool.size());
+ Map<Integer, String> hm = cpv.getBSMMap();
+
+ List<String> expectedValList = tc.getExpectedArgValues();
+ expectedValList.add(tc.bsmSpecifier.specifier);
+ if(!(hm.values().containsAll(new HashSet<String>(expectedValList)))) {
+ System.out.println("Values do not match");
+ return false;
+ }
+ return true;
+ }
+
+ private static File getCompiledFile(String fname, String srcString) {
+ File testFile = null, classFile = null;
+ boolean isTestFileCreated = true;
+
+ try {
+ testFile = writeTestFile(fname+".java", srcString);
+ } catch(IOException ioe) {
+ isTestFileCreated = false;
+ System.err.println("fail to write" + ioe);
+ }
+
+ if(isTestFileCreated) {
+ try {
+ classFile = compile(testFile);
+ } catch (Error err) {
+ System.err.println("fail compile. Source:\n" + srcString);
+ throw err;
+ }
+ }
+ return classFile;
+ }
+
+ static File writeTestFile(String fname, String source) throws IOException {
+ File f = new File(fname);
+ PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter(f)));
+ out.println(source);
+ out.close();
+ return f;
+ }
+
+ static File compile(File f) {
+ int rc = com.sun.tools.javac.Main.compile(new String[] {
+ "-source", "1.8", "-g", f.getPath() });
+ if (rc != 0)
+ throw new Error("compilation failed. rc=" + rc);
+ String path = f.getPath();
+ return new File(path.substring(0, path.length() - 5) + ".class");
+ }
+
+ static void debugln(String str) {
+ if(IS_DEBUG)
+ System.out.println(str);
+ }
+
+ enum BSMSpecifier {
+ SPECIFIER1("REF_invokeStatic java/lang/invoke/LambdaMetafactory metaFactory " +
+ "(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;" +
+ "Ljava/lang/invoke/MethodHandle;Ljava/lang/invoke/MethodHandle;Ljava/lang/invoke/MethodType;)" +
+ "Ljava/lang/invoke/CallSite;"),
+ SPECIFIER2("REF_invokeStatic java/lang/invoke/LambdaMetafactory altMetaFactory " +
+ "(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;" +
+ "[Ljava/lang/Object;)Ljava/lang/invoke/CallSite;");
+
+ String specifier;
+ private BSMSpecifier(String specifier) {
+ this.specifier = specifier;
+ }
+ }
+
+ enum TestCases {
+ // Single line lambda expression
+ TC1("class TC1 {\n" +
+ " public static void main(String[] args) {\n" +
+ " Object o = (Runnable) () -> { System.out.println(\"hi\");};\n" +
+ " }\n"+
+ "}", BSMSpecifier.SPECIFIER1) {
+
+ @Override
+ List<String> getExpectedArgValues() {
+ List<String> valList = new ArrayList<>();
+ valList.add("REF_invokeInterface java/lang/Runnable run ()V");
+ valList.add("REF_invokeStatic TC1 lambda$0 ()V");
+ valList.add("()V");
+ return valList;
+ }
+ },
+
+ // Lambda expression in a for loop
+ TC2("import java.util.*;\n" +
+ "public class TC2 {\n" +
+ " void TC2_test() {\n" +
+ " List<String> list = new ArrayList<>();\n" +
+ " list.add(\"A\");\n" +
+ " list.add(\"B\");\n" +
+ " list.stream().forEach( s -> { System.out.println(s); } );\n" +
+ " }\n" +
+ " public static void main(String[] args) {\n" +
+ " new TC2().TC2_test();\n" +
+ " }\n" +
+ "}", BSMSpecifier.SPECIFIER1) {
+
+ @Override
+ List<String> getExpectedArgValues() {
+ List<String> valList = new ArrayList<>();
+ valList.add("REF_invokeInterface java/util/function/Consumer accept (Ljava/lang/Object;)V");
+ valList.add("REF_invokeStatic TC2 lambda$0 (Ljava/lang/String;)V");
+ valList.add("(Ljava/lang/String;)V");
+ return valList;
+ }
+ },
+
+ // Lambda initializer
+ TC3("class TC3 {\n" +
+ " interface SAM {\n" +
+ " void m(int i);\n" +
+ " }\n" +
+ " SAM lambda_03 = (int pos) -> { };\n" +
+ "}", BSMSpecifier.SPECIFIER1) {
+
+ @Override
+ List<String> getExpectedArgValues() {
+ List<String> valList = new ArrayList<>();
+ valList.add("REF_invokeInterface TC3$SAM m (I)V");
+ valList.add("REF_invokeStatic TC3 lambda$0 (I)V");
+ valList.add("(I)V");
+ return valList;
+ }
+ },
+
+ // Array initializer
+ TC4("class TC4 {\n" +
+ " interface Block<T> {\n" +
+ " void m(T t);\n" +
+ " }\n" +
+ " void test1() {\n" +
+ " Block<?>[] arr1 = { t -> { }, t -> { } };\n" +
+ " }\n" +
+ "}", BSMSpecifier.SPECIFIER1) {
+
+ @Override
+ List<String> getExpectedArgValues() {
+ List<String> valList = new ArrayList<>();
+ valList.add("REF_invokeInterface TC4$Block m (Ljava/lang/Object;)V");
+ valList.add("REF_invokeStatic TC4 lambda$0 (Ljava/lang/Object;)V");
+ valList.add("(Ljava/lang/Object;)V");
+ valList.add("REF_invokeStatic TC4 lambda$1 (Ljava/lang/Object;)V");
+ return valList;
+ }
+ },
+
+ //Lambda expression as a method arg
+ TC5("class TC5 {\n"+
+ " interface MapFun<T,R> { R m( T n); }\n" +
+ " void meth( MapFun<String,Integer> mf ) {\n" +
+ " assert( mf.m(\"four\") == 4);\n" +
+ " }\n"+
+ " void test(Integer i) {\n" +
+ " meth(s -> { Integer len = s.length(); return len; } );\n" +
+ " }\n"+
+ "}", BSMSpecifier.SPECIFIER1) {
+
+ @Override
+ List<String> getExpectedArgValues() {
+ List<String> valList = new ArrayList<>();
+ valList.add("REF_invokeInterface TC5$MapFun m (Ljava/lang/Object;)Ljava/lang/Object;");
+ valList.add("REF_invokeStatic TC5 lambda$0 (Ljava/lang/String;)Ljava/lang/Integer;");
+ valList.add("(Ljava/lang/String;)Ljava/lang/Integer;");
+ return valList;
+ }
+ },
+
+ //Inner class of Lambda expression
+ TC6("class TC6 {\n" +
+ " interface MapFun<T, R> { R m( T n); }\n" +
+ " MapFun<Class<?>,String> cs;\n" +
+ " void test() {\n" +
+ " cs = c -> {\n" +
+ " class innerClass {\n" +
+ " Class<?> icc;\n" +
+ " innerClass(Class<?> _c) { icc = _c; }\n" +
+ " String getString() { return icc.toString(); }\n" +
+ " }\n" +
+ " return new innerClass(c).getString();\n"+
+ " };\n" +
+ " }\n" +
+ "}\n", BSMSpecifier.SPECIFIER1) {
+
+ @Override
+ List<String> getExpectedArgValues() {
+ List<String> valList = new ArrayList<>();
+ valList.add("REF_invokeInterface TC6$MapFun m (Ljava/lang/Object;)Ljava/lang/Object;");
+ valList.add("REF_invokeSpecial TC6 lambda$0 (Ljava/lang/Class;)Ljava/lang/String;");
+ valList.add("(Ljava/lang/Class;)Ljava/lang/String;");
+ return valList;
+ }
+ },
+
+ // Method reference
+ TC7("class TC7 {\n" +
+ " static interface SAM {\n" +
+ " void m(Integer i);\n" +
+ " }\n" +
+ " void m(Integer i) {}\n" +
+ " SAM s = this::m;\n" +
+ "}\n", BSMSpecifier.SPECIFIER1) {
+
+ @Override
+ List<String> getExpectedArgValues() {
+ List<String> valList = new ArrayList<>();
+ valList.add("REF_invokeInterface TC7$SAM m (Ljava/lang/Integer;)V");
+ valList.add("REF_invokeVirtual TC7 m (Ljava/lang/Integer;)V");
+ valList.add("(Ljava/lang/Integer;)V");
+ return valList;
+ }
+ },
+
+ // Constructor reference
+ TC8("public class TC8 {\n" +
+ " static interface A {Fee<String> m();}\n" +
+ " static class Fee<T> {\n" +
+ " private T t;\n" +
+ " public Fee() {}\n" +
+ " }\n" +
+ " public static void main(String[] args) {\n" +
+ " A a = Fee<String>::new; \n" +
+ " }\n" +
+ "}\n", BSMSpecifier.SPECIFIER1) {
+
+ @Override
+ List<String> getExpectedArgValues() {
+ List<String> valList = new ArrayList<>();
+ valList.add("REF_invokeInterface TC8$A m ()LTC8$Fee;");
+ valList.add("REF_newInvokeSpecial TC8$Fee <init> ()V");
+ valList.add("()LTC8$Fee;");
+ return valList;
+ }
+ },
+
+ // Recursive lambda expression
+ TC9("class TC9 {\n" +
+ " interface Recursive<T, R> { T apply(R n); };\n" +
+ " Recursive<Integer,Integer> factorial;\n" +
+ " void test(Integer j) {\n" +
+ " factorial = i -> { return i == 0 ? 1 : i * factorial.apply( i - 1 ); };\n" +
+ " }\n" +
+ "}\n", BSMSpecifier.SPECIFIER1) {
+
+ @Override
+ List<String> getExpectedArgValues() {
+ List<String> valList = new ArrayList<>();
+ valList.add("REF_invokeInterface TC9$Recursive apply (Ljava/lang/Object;)Ljava/lang/Object;");
+ valList.add("REF_invokeSpecial TC9 lambda$0 (Ljava/lang/Integer;)Ljava/lang/Integer;");
+ valList.add("(Ljava/lang/Integer;)Ljava/lang/Integer;");
+ return valList;
+ }
+ },
+
+ //Serializable Lambda
+ TC10("import java.io.Serializable;\n" +
+ "class TC10 {\n" +
+ " interface Foo { int m(); }\n" +
+ " public static void main(String[] args) {\n" +
+ " Foo f1 = (Foo & Serializable)() -> 3;\n" +
+ " }\n" +
+ "}\n", BSMSpecifier.SPECIFIER2) {
+
+ @Override
+ List<String> getExpectedArgValues() {
+ List<String> valList = new ArrayList<>();
+ valList.add("REF_invokeStatic java/lang/invoke/LambdaMetafactory altMetaFactory (Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;[Ljava/lang/Object;)Ljava/lang/invoke/CallSite;");
+ valList.add("REF_invokeInterface TC10$Foo m ()I");
+ valList.add("REF_invokeStatic TC10 lambda$main$3231c38a$0 ()I");
+ valList.add("()I");
+ valList.add("1");
+ return valList;
+ }
+ };
+
+ String srcCode;
+ BSMSpecifier bsmSpecifier;
+
+ TestCases(String src, BSMSpecifier bsmSpecifier) {
+ this.srcCode = src;
+ // By default, all test cases will have bootstrap method specifier as Lambda.MetaFactory
+ // For serializable lambda test cases, bootstrap method specifier changed to altMetaFactory
+ this.bsmSpecifier = bsmSpecifier;
+ }
+
+ List<String> getExpectedArgValues() {
+ return null;
+ }
+
+ void setSrcCode(String src) {
+ srcCode = src;
+ }
+ }
+
+ static class ConstantPoolVisitor implements ConstantPool.Visitor<String, Integer> {
+ final List<String> slist;
+ final ClassFile cf;
+ final ConstantPool cfpool;
+ final Map<Integer, String> bsmMap;
+
+
+ public ConstantPoolVisitor(ClassFile cf, int size) {
+ slist = new ArrayList<>(size);
+ for (int i = 0 ; i < size; i++) {
+ slist.add(null);
+ }
+ this.cf = cf;
+ this.cfpool = cf.constant_pool;
+ bsmMap = readBSM();
+ }
+
+ public Map<Integer, String> getBSMMap() {
+ return Collections.unmodifiableMap(bsmMap);
+ }
+
+ public String visit(CPInfo c, int index) {
+ return c.accept(this, index);
+ }
+
+ private Map<Integer, String> readBSM() {
+ BootstrapMethods_attribute bsmAttr =
+ (BootstrapMethods_attribute) cf.getAttribute(Attribute.BootstrapMethods);
+ if (bsmAttr != null) {
+ Map<Integer, String> out =
+ new HashMap<>(bsmAttr.bootstrap_method_specifiers.length);
+ for (BootstrapMethods_attribute.BootstrapMethodSpecifier bsms :
+ bsmAttr.bootstrap_method_specifiers) {
+ int index = bsms.bootstrap_method_ref;
+ try {
+ String value = slist.get(index);
+ if (value == null) {
+ value = visit(cfpool.get(index), index);
+ debugln("[SG]: index " + index);
+ debugln("[SG]: value " + value);
+ slist.set(index, value);
+ out.put(index, value);
+ }
+ for (int idx : bsms.bootstrap_arguments) {
+ value = slist.get(idx);
+ if (value == null) {
+ value = visit(cfpool.get(idx), idx);
+ debugln("[SG]: idx " + idx);
+ debugln("[SG]: value " + value);
+ slist.set(idx, value);
+ out.put(idx, value);
+ }
+ }
+ } catch (InvalidIndex ex) {
+ ex.printStackTrace();
+ }
+ }
+ return out;
+ }
+ return new HashMap<>(0);
+ }
+
+ @Override
+ public String visitClass(CONSTANT_Class_info c, Integer p) {
+
+ String value = slist.get(p);
+ if (value == null) {
+ try {
+ value = visit(cfpool.get(c.name_index), c.name_index);
+ slist.set(p, value);
+ } catch (ConstantPoolException ex) {
+ ex.printStackTrace();
+ }
+ }
+ return value;
+ }
+
+ @Override
+ public String visitDouble(CONSTANT_Double_info c, Integer p) {
+
+ String value = slist.get(p);
+ if (value == null) {
+ value = Double.toString(c.value);
+ slist.set(p, value);
+ }
+ return value;
+ }
+
+ @Override
+ public String visitFieldref(CONSTANT_Fieldref_info c, Integer p) {
+
+ String value = slist.get(p);
+ if (value == null) {
+ try {
+ value = visit(cfpool.get(c.class_index), c.class_index);
+ value = value.concat(" " + visit(cfpool.get(c.name_and_type_index),
+ c.name_and_type_index));
+ slist.set(p, value);
+ } catch (ConstantPoolException ex) {
+ ex.printStackTrace();
+ }
+ }
+ return value;
+ }
+
+ @Override
+ public String visitFloat(CONSTANT_Float_info c, Integer p) {
+
+ String value = slist.get(p);
+ if (value == null) {
+ value = Float.toString(c.value);
+ slist.set(p, value);
+ }
+ return value;
+ }
+
+ @Override
+ public String visitInteger(CONSTANT_Integer_info cnstnt, Integer p) {
+
+ String value = slist.get(p);
+ if (value == null) {
+ value = Integer.toString(cnstnt.value);
+ slist.set(p, value);
+ }
+ return value;
+ }
+
+ @Override
+ public String visitInterfaceMethodref(CONSTANT_InterfaceMethodref_info c,
+ Integer p) {
+
+ String value = slist.get(p);
+ if (value == null) {
+ try {
+ value = visit(cfpool.get(c.class_index), c.class_index);
+ value = value.concat(" " +
+ visit(cfpool.get(c.name_and_type_index),
+ c.name_and_type_index));
+ slist.set(p, value);
+ } catch (ConstantPoolException ex) {
+ ex.printStackTrace();
+ }
+ }
+ return value;
+ }
+
+ @Override
+ public String visitInvokeDynamic(CONSTANT_InvokeDynamic_info c, Integer p) {
+
+ String value = slist.get(p);
+ if (value == null) {
+ try {
+ value = bsmMap.get(c.bootstrap_method_attr_index) + " "
+ + visit(cfpool.get(c.name_and_type_index), c.name_and_type_index);
+ slist.set(p, value);
+ } catch (ConstantPoolException ex) {
+ ex.printStackTrace();
+ }
+ }
+ return value;
+ }
+
+ @Override
+ public String visitLong(CONSTANT_Long_info c, Integer p) {
+
+ String value = slist.get(p);
+ if (value == null) {
+ value = Long.toString(c.value);
+ slist.set(p, value);
+ }
+ return value;
+ }
+
+ @Override
+ public String visitNameAndType(CONSTANT_NameAndType_info c, Integer p) {
+
+ String value = slist.get(p);
+ if (value == null) {
+ try {
+ value = visit(cfpool.get(c.name_index), c.name_index);
+ value = value.concat(" " +
+ visit(cfpool.get(c.type_index), c.type_index));
+ slist.set(p, value);
+ } catch (InvalidIndex ex) {
+ ex.printStackTrace();
+ }
+ }
+ return value;
+ }
+
+ @Override
+ public String visitMethodref(CONSTANT_Methodref_info c, Integer p) {
+
+ String value = slist.get(p);
+ if (value == null) {
+ try {
+ value = visit(cfpool.get(c.class_index), c.class_index);
+ value = value.concat(" " +
+ visit(cfpool.get(c.name_and_type_index),
+ c.name_and_type_index));
+ slist.set(p, value);
+ } catch (ConstantPoolException ex) {
+ ex.printStackTrace();
+ }
+ }
+ return value;
+ }
+
+ @Override
+ public String visitMethodHandle(CONSTANT_MethodHandle_info c, Integer p) {
+
+ String value = slist.get(p);
+ if (value == null) {
+ try {
+ value = c.reference_kind.name();
+ value = value.concat(" "
+ + visit(cfpool.get(c.reference_index), c.reference_index));
+ slist.set(p, value);
+ } catch (ConstantPoolException ex) {
+ ex.printStackTrace();
+ }
+ }
+ return value;
+ }
+
+ @Override
+ public String visitMethodType(CONSTANT_MethodType_info c, Integer p) {
+
+ String value = slist.get(p);
+ if (value == null) {
+ try {
+ value = visit(cfpool.get(c.descriptor_index), c.descriptor_index);
+ slist.set(p, value);
+ } catch (ConstantPoolException ex) {
+ ex.printStackTrace();
+ }
+ }
+ return value;
+ }
+
+ @Override
+ public String visitString(CONSTANT_String_info c, Integer p) {
+
+ try {
+ String value = slist.get(p);
+ if (value == null) {
+ value = c.getString();
+ slist.set(p, value);
+ }
+ return value;
+ } catch (ConstantPoolException ex) {
+ throw new RuntimeException("Fatal error", ex);
+ }
+ }
+
+ @Override
+ public String visitUtf8(CONSTANT_Utf8_info cnstnt, Integer p) {
+
+ String value = slist.get(p);
+ if (value == null) {
+ value = cnstnt.value;
+ slist.set(p, value);
+ }
+ return value;
+ }
+ }
+}
+