langtools/test/tools/javac/varargs/7042566/T7042566.java - platform/libcore - Git at Google

 /*
  * Copyright (c) 2011, 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 7042566
  * @summary Unambiguous varargs method calls flagged as ambiguous
  * @library ../../lib
  * @build JavacTestingAbstractThreadedTest
  * @run main T7042566
  */

 import java.io.File;
 import java.net.URI;
 import java.util.Arrays;
 import java.util.Locale;
 import java.util.concurrent.atomic.AtomicInteger;
 import javax.tools.Diagnostic;
 import javax.tools.JavaCompiler;
 import javax.tools.JavaFileObject;
 import javax.tools.SimpleJavaFileObject;
 import javax.tools.ToolProvider;

 import com.sun.source.util.JavacTask;
 import com.sun.tools.classfile.Instruction;
 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.Method;
 import com.sun.tools.javac.util.List;

 public class T7042566
     extends JavacTestingAbstractThreadedTest
     implements Runnable {

     VarargsMethod m1;
     VarargsMethod m2;
     TypeConfiguration actuals;

     T7042566(TypeConfiguration m1_conf, TypeConfiguration m2_conf,
             TypeConfiguration actuals) {
         this.m1 = new VarargsMethod(m1_conf);
         this.m2 = new VarargsMethod(m2_conf);
         this.actuals = actuals;
     }

     @Override
     public void run() {
         int id = checkCount.incrementAndGet();
         final JavaCompiler tool = ToolProvider.getSystemJavaCompiler();
         JavaSource source = new JavaSource(id);
         ErrorChecker ec = new ErrorChecker();
         JavacTask ct = (JavacTask)tool.getTask(null, fm.get(), ec,
                 null, null, Arrays.asList(source));
         ct.call();
         check(source, ec, id);
     }

     void check(JavaSource source, ErrorChecker ec, int id) {
         boolean resolutionError = false;
         VarargsMethod selectedMethod = null;

         boolean m1_applicable = m1.isApplicable(actuals);
         boolean m2_applicable = m2.isApplicable(actuals);

         if (!m1_applicable && !m2_applicable) {
             resolutionError = true;
         } else if (m1_applicable && m2_applicable) {
             //most specific
             boolean m1_moreSpecific = m1.isMoreSpecificThan(m2);
             boolean m2_moreSpecific = m2.isMoreSpecificThan(m1);

             resolutionError = m1_moreSpecific == m2_moreSpecific;
             selectedMethod = m1_moreSpecific ? m1 : m2;
         } else {
             selectedMethod = m1_applicable ?
                 m1 : m2;
         }

         if (ec.errorFound != resolutionError) {
             throw new Error("invalid diagnostics for source:\n" +
                     source.getCharContent(true) +
                     "\nExpected resolution error: " + resolutionError +
                     "\nFound error: " + ec.errorFound +
                     "\nCompiler diagnostics:\n" + ec.printDiags());
         } else if (!resolutionError) {
             verifyBytecode(selectedMethod, source, id);
         }
     }

     void verifyBytecode(VarargsMethod selected, JavaSource source, int id) {
         bytecodeCheckCount.incrementAndGet();
         File compiledTest = new File(String.format("Test%d.class", id));
         try {
             ClassFile cf = ClassFile.read(compiledTest);
             Method testMethod = null;
             for (Method m : cf.methods) {
                 if (m.getName(cf.constant_pool).equals("test")) {
                     testMethod = m;
                     break;
                 }
             }
             if (testMethod == null) {
                 throw new Error("Test method not found");
             }
             Code_attribute ea =
                 (Code_attribute)testMethod.attributes.get(Attribute.Code);
             if (testMethod == null) {
                 throw new Error("Code attribute for test() method not found");
             }

             for (Instruction i : ea.getInstructions()) {
                 if (i.getMnemonic().equals("invokevirtual")) {
                     int cp_entry = i.getUnsignedShort(1);
                     CONSTANT_Methodref_info methRef =
                         (CONSTANT_Methodref_info)cf.constant_pool.get(cp_entry);
                     String type = methRef.getNameAndTypeInfo().getType();
                     String sig = selected.parameterTypes.bytecodeSigStr;
                     if (!type.contains(sig)) {
                         throw new Error("Unexpected type method call: " +
                                         type + "" +
                                         "\nfound: " + sig +
                                         "\n" + source.getCharContent(true));
                     }
                     break;
                 }
             }
         } catch (Exception e) {
             e.printStackTrace();
             throw new Error("error reading " + compiledTest +": " + e);
         }
     }

     class JavaSource extends SimpleJavaFileObject {

         static final String source_template = "class Test#ID {\n" +
                 "   #V1\n" +
                 "   #V2\n" +
                 "   void test() { m(#E); }\n" +
                 "}";

         String source;

         public JavaSource(int id) {
             super(URI.create(String.format("myfo:/Test%d.java", id)),
                     JavaFileObject.Kind.SOURCE);
             source = source_template.replaceAll("#V1", m1.toString())
                     .replaceAll("#V2", m2.toString())
                     .replaceAll("#E", actuals.expressionListStr)
                     .replaceAll("#ID", String.valueOf(id));
         }

         @Override
         public CharSequence getCharContent(boolean ignoreEncodingErrors) {
             return source;
         }
     }

     public static void main(String... args) throws Exception {
         for (TypeConfiguration tconf1 : TypeConfiguration.values()) {
             for (TypeConfiguration tconf2 : TypeConfiguration.values()) {
                 for (TypeConfiguration tconf3 : TypeConfiguration.values()) {
                     pool.execute(new T7042566(tconf1, tconf2, tconf3));
                 }
             }
         }

         outWriter.println("Bytecode checks made: " + bytecodeCheckCount.get());
         checkAfterExec();
     }

     enum TypeKind {
         OBJECT("Object", "(Object)null", "Ljava/lang/Object;"),
         STRING("String", "(String)null", "Ljava/lang/String;");

         String typeString;
         String valueString;
         String bytecodeString;

         TypeKind(String typeString, String valueString, String bytecodeString) {
             this.typeString = typeString;
             this.valueString = valueString;
             this.bytecodeString = bytecodeString;
         }

         boolean isSubtypeOf(TypeKind that) {
             return that == OBJECT ||
                     (that == STRING && this == STRING);
         }
     }

     enum TypeConfiguration {
         A(TypeKind.OBJECT),
         B(TypeKind.STRING),
         AA(TypeKind.OBJECT, TypeKind.OBJECT),
         AB(TypeKind.OBJECT, TypeKind.STRING),
         BA(TypeKind.STRING, TypeKind.OBJECT),
         BB(TypeKind.STRING, TypeKind.STRING),
         AAA(TypeKind.OBJECT, TypeKind.OBJECT, TypeKind.OBJECT),
         AAB(TypeKind.OBJECT, TypeKind.OBJECT, TypeKind.STRING),
         ABA(TypeKind.OBJECT, TypeKind.STRING, TypeKind.OBJECT),
         ABB(TypeKind.OBJECT, TypeKind.STRING, TypeKind.STRING),
         BAA(TypeKind.STRING, TypeKind.OBJECT, TypeKind.OBJECT),
         BAB(TypeKind.STRING, TypeKind.OBJECT, TypeKind.STRING),
         BBA(TypeKind.STRING, TypeKind.STRING, TypeKind.OBJECT),
         BBB(TypeKind.STRING, TypeKind.STRING, TypeKind.STRING);

         List<TypeKind> typeKindList;
         String expressionListStr;
         String parameterListStr;
         String bytecodeSigStr;

         private TypeConfiguration(TypeKind... typeKindList) {
             this.typeKindList = List.from(typeKindList);
             expressionListStr = asExpressionList();
             parameterListStr = asParameterList();
             bytecodeSigStr = asBytecodeString();
         }

         private String asExpressionList() {
             StringBuilder buf = new StringBuilder();
             String sep = "";
             for (TypeKind tk : typeKindList) {
                 buf.append(sep);
                 buf.append(tk.valueString);
                 sep = ",";
             }
             return buf.toString();
         }

         private String asParameterList() {
             StringBuilder buf = new StringBuilder();
             String sep = "";
             int count = 0;
             for (TypeKind arg : typeKindList) {
                 buf.append(sep);
                 buf.append(arg.typeString);
                 if (count == (typeKindList.size() - 1)) {
                     buf.append("...");
                 }
                 buf.append(" ");
                 buf.append("arg" + count++);
                 sep = ",";
             }
             return buf.toString();
         }

         private String asBytecodeString() {
             StringBuilder buf = new StringBuilder();
             int count = 0;
             for (TypeKind arg : typeKindList) {
                 if (count == (typeKindList.size() - 1)) {
                     buf.append("[");
                 }
                 buf.append(arg.bytecodeString);
                 count++;
             }
             return buf.toString();
         }
     }

     static class VarargsMethod {
         TypeConfiguration parameterTypes;

         public VarargsMethod(TypeConfiguration parameterTypes) {
             this.parameterTypes = parameterTypes;
         }

         @Override
         public String toString() {
             return "void m( " + parameterTypes.parameterListStr + ") {}";
         }

         boolean isApplicable(TypeConfiguration that) {
             List<TypeKind> actuals = that.typeKindList;
             List<TypeKind> formals = parameterTypes.typeKindList;
             if ((actuals.size() - formals.size()) < -1)
                 return false; //not enough args
             for (TypeKind actual : actuals) {
                 if (!actual.isSubtypeOf(formals.head))
                     return false; //type mismatch
                 formals = formals.tail.isEmpty() ?
                     formals :
                     formals.tail;
             }
             return true;
         }

         boolean isMoreSpecificThan(VarargsMethod that) {
             List<TypeKind> actuals = parameterTypes.typeKindList;
             List<TypeKind> formals = that.parameterTypes.typeKindList;
             int checks = 0;
             int expectedCheck = Math.max(actuals.size(), formals.size());
             while (checks < expectedCheck) {
                 if (!actuals.head.isSubtypeOf(formals.head))
                     return false; //type mismatch
                 formals = formals.tail.isEmpty() ?
                     formals :
                     formals.tail;
                 actuals = actuals.tail.isEmpty() ?
                     actuals :
                     actuals.tail;
                 checks++;
             }
             return true;
         }
     }

     static class ErrorChecker
         implements javax.tools.DiagnosticListener<JavaFileObject> {

         boolean errorFound;
         List<String> errDiags = List.nil();

         public void report(Diagnostic<? extends JavaFileObject> diagnostic) {
             if (diagnostic.getKind() == Diagnostic.Kind.ERROR) {
                 errDiags = errDiags
                         .append(diagnostic.getMessage(Locale.getDefault()));
                 errorFound = true;
             }
         }

         String printDiags() {
             StringBuilder buf = new StringBuilder();
             for (String s : errDiags) {
                 buf.append(s);
                 buf.append("\n");
             }
             return buf.toString();
         }
     }

     //number of bytecode checks made while running combo tests
     static AtomicInteger bytecodeCheckCount = new AtomicInteger();

 }
	/*
	* Copyright (c) 2011, 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 7042566
	* @summary Unambiguous varargs method calls flagged as ambiguous
	* @library ../../lib
	* @build JavacTestingAbstractThreadedTest
	* @run main T7042566
	*/

	import java.io.File;
	import java.net.URI;
	import java.util.Arrays;
	import java.util.Locale;
	import java.util.concurrent.atomic.AtomicInteger;
	import javax.tools.Diagnostic;
	import javax.tools.JavaCompiler;
	import javax.tools.JavaFileObject;
	import javax.tools.SimpleJavaFileObject;
	import javax.tools.ToolProvider;

	import com.sun.source.util.JavacTask;
	import com.sun.tools.classfile.Instruction;
	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.Method;
	import com.sun.tools.javac.util.List;

	public class T7042566
	extends JavacTestingAbstractThreadedTest
	implements Runnable {

	VarargsMethod m1;
	VarargsMethod m2;
	TypeConfiguration actuals;

	T7042566(TypeConfiguration m1_conf, TypeConfiguration m2_conf,
	TypeConfiguration actuals) {
	this.m1 = new VarargsMethod(m1_conf);
	this.m2 = new VarargsMethod(m2_conf);
	this.actuals = actuals;
	}

	@Override
	public void run() {
	int id = checkCount.incrementAndGet();
	final JavaCompiler tool = ToolProvider.getSystemJavaCompiler();
	JavaSource source = new JavaSource(id);
	ErrorChecker ec = new ErrorChecker();
	JavacTask ct = (JavacTask)tool.getTask(null, fm.get(), ec,
	null, null, Arrays.asList(source));
	ct.call();
	check(source, ec, id);
	}

	void check(JavaSource source, ErrorChecker ec, int id) {
	boolean resolutionError = false;
	VarargsMethod selectedMethod = null;

	boolean m1_applicable = m1.isApplicable(actuals);
	boolean m2_applicable = m2.isApplicable(actuals);

	if (!m1_applicable && !m2_applicable) {
	resolutionError = true;
	} else if (m1_applicable && m2_applicable) {
	//most specific
	boolean m1_moreSpecific = m1.isMoreSpecificThan(m2);
	boolean m2_moreSpecific = m2.isMoreSpecificThan(m1);

	resolutionError = m1_moreSpecific == m2_moreSpecific;
	selectedMethod = m1_moreSpecific ? m1 : m2;
	} else {
	selectedMethod = m1_applicable ?
	m1 : m2;
	}

	if (ec.errorFound != resolutionError) {
	throw new Error("invalid diagnostics for source:\n" +
	source.getCharContent(true) +
	"\nExpected resolution error: " + resolutionError +
	"\nFound error: " + ec.errorFound +
	"\nCompiler diagnostics:\n" + ec.printDiags());
	} else if (!resolutionError) {
	verifyBytecode(selectedMethod, source, id);
	}
	}

	void verifyBytecode(VarargsMethod selected, JavaSource source, int id) {
	bytecodeCheckCount.incrementAndGet();
	File compiledTest = new File(String.format("Test%d.class", id));
	try {
	ClassFile cf = ClassFile.read(compiledTest);
	Method testMethod = null;
	for (Method m : cf.methods) {
	if (m.getName(cf.constant_pool).equals("test")) {
	testMethod = m;
	break;
	}
	}
	if (testMethod == null) {
	throw new Error("Test method not found");
	}
	Code_attribute ea =
	(Code_attribute)testMethod.attributes.get(Attribute.Code);
	if (testMethod == null) {
	throw new Error("Code attribute for test() method not found");
	}

	for (Instruction i : ea.getInstructions()) {
	if (i.getMnemonic().equals("invokevirtual")) {
	int cp_entry = i.getUnsignedShort(1);
	CONSTANT_Methodref_info methRef =
	(CONSTANT_Methodref_info)cf.constant_pool.get(cp_entry);
	String type = methRef.getNameAndTypeInfo().getType();
	String sig = selected.parameterTypes.bytecodeSigStr;
	if (!type.contains(sig)) {
	throw new Error("Unexpected type method call: " +
	type + "" +
	"\nfound: " + sig +
	"\n" + source.getCharContent(true));
	}
	break;
	}
	}
	} catch (Exception e) {
	e.printStackTrace();
	throw new Error("error reading " + compiledTest +": " + e);
	}
	}

	class JavaSource extends SimpleJavaFileObject {

	static final String source_template = "class Test#ID {\n" +
	" #V1\n" +
	" #V2\n" +
	" void test() { m(#E); }\n" +
	"}";

	String source;

	public JavaSource(int id) {
	super(URI.create(String.format("myfo:/Test%d.java", id)),
	JavaFileObject.Kind.SOURCE);
	source = source_template.replaceAll("#V1", m1.toString())
	.replaceAll("#V2", m2.toString())
	.replaceAll("#E", actuals.expressionListStr)
	.replaceAll("#ID", String.valueOf(id));
	}

	@Override
	public CharSequence getCharContent(boolean ignoreEncodingErrors) {
	return source;
	}
	}

	public static void main(String... args) throws Exception {
	for (TypeConfiguration tconf1 : TypeConfiguration.values()) {
	for (TypeConfiguration tconf2 : TypeConfiguration.values()) {
	for (TypeConfiguration tconf3 : TypeConfiguration.values()) {
	pool.execute(new T7042566(tconf1, tconf2, tconf3));
	}
	}
	}

	outWriter.println("Bytecode checks made: " + bytecodeCheckCount.get());
	checkAfterExec();
	}

	enum TypeKind {
	OBJECT("Object", "(Object)null", "Ljava/lang/Object;"),
	STRING("String", "(String)null", "Ljava/lang/String;");

	String typeString;
	String valueString;
	String bytecodeString;

	TypeKind(String typeString, String valueString, String bytecodeString) {
	this.typeString = typeString;
	this.valueString = valueString;
	this.bytecodeString = bytecodeString;
	}

	boolean isSubtypeOf(TypeKind that) {
	return that == OBJECT \|\|
	(that == STRING && this == STRING);
	}
	}

	enum TypeConfiguration {
	A(TypeKind.OBJECT),
	B(TypeKind.STRING),
	AA(TypeKind.OBJECT, TypeKind.OBJECT),
	AB(TypeKind.OBJECT, TypeKind.STRING),
	BA(TypeKind.STRING, TypeKind.OBJECT),
	BB(TypeKind.STRING, TypeKind.STRING),
	AAA(TypeKind.OBJECT, TypeKind.OBJECT, TypeKind.OBJECT),
	AAB(TypeKind.OBJECT, TypeKind.OBJECT, TypeKind.STRING),
	ABA(TypeKind.OBJECT, TypeKind.STRING, TypeKind.OBJECT),
	ABB(TypeKind.OBJECT, TypeKind.STRING, TypeKind.STRING),
	BAA(TypeKind.STRING, TypeKind.OBJECT, TypeKind.OBJECT),
	BAB(TypeKind.STRING, TypeKind.OBJECT, TypeKind.STRING),
	BBA(TypeKind.STRING, TypeKind.STRING, TypeKind.OBJECT),
	BBB(TypeKind.STRING, TypeKind.STRING, TypeKind.STRING);

	List<TypeKind> typeKindList;
	String expressionListStr;
	String parameterListStr;
	String bytecodeSigStr;

	private TypeConfiguration(TypeKind... typeKindList) {
	this.typeKindList = List.from(typeKindList);
	expressionListStr = asExpressionList();
	parameterListStr = asParameterList();
	bytecodeSigStr = asBytecodeString();
	}

	private String asExpressionList() {
	StringBuilder buf = new StringBuilder();
	String sep = "";
	for (TypeKind tk : typeKindList) {
	buf.append(sep);
	buf.append(tk.valueString);
	sep = ",";
	}
	return buf.toString();
	}

	private String asParameterList() {
	StringBuilder buf = new StringBuilder();
	String sep = "";
	int count = 0;
	for (TypeKind arg : typeKindList) {
	buf.append(sep);
	buf.append(arg.typeString);
	if (count == (typeKindList.size() - 1)) {
	buf.append("...");
	}
	buf.append(" ");
	buf.append("arg" + count++);
	sep = ",";
	}
	return buf.toString();
	}

	private String asBytecodeString() {
	StringBuilder buf = new StringBuilder();
	int count = 0;
	for (TypeKind arg : typeKindList) {
	if (count == (typeKindList.size() - 1)) {
	buf.append("[");
	}
	buf.append(arg.bytecodeString);
	count++;
	}
	return buf.toString();
	}
	}

	static class VarargsMethod {
	TypeConfiguration parameterTypes;

	public VarargsMethod(TypeConfiguration parameterTypes) {
	this.parameterTypes = parameterTypes;
	}

	@Override
	public String toString() {
	return "void m( " + parameterTypes.parameterListStr + ") {}";
	}

	boolean isApplicable(TypeConfiguration that) {
	List<TypeKind> actuals = that.typeKindList;
	List<TypeKind> formals = parameterTypes.typeKindList;
	if ((actuals.size() - formals.size()) < -1)
	return false; //not enough args
	for (TypeKind actual : actuals) {
	if (!actual.isSubtypeOf(formals.head))
	return false; //type mismatch
	formals = formals.tail.isEmpty() ?
	formals :
	formals.tail;
	}
	return true;
	}

	boolean isMoreSpecificThan(VarargsMethod that) {
	List<TypeKind> actuals = parameterTypes.typeKindList;
	List<TypeKind> formals = that.parameterTypes.typeKindList;
	int checks = 0;
	int expectedCheck = Math.max(actuals.size(), formals.size());
	while (checks < expectedCheck) {
	if (!actuals.head.isSubtypeOf(formals.head))
	return false; //type mismatch
	formals = formals.tail.isEmpty() ?
	formals :
	formals.tail;
	actuals = actuals.tail.isEmpty() ?
	actuals :
	actuals.tail;
	checks++;
	}
	return true;
	}
	}

	static class ErrorChecker
	implements javax.tools.DiagnosticListener<JavaFileObject> {

	boolean errorFound;
	List<String> errDiags = List.nil();

	public void report(Diagnostic<? extends JavaFileObject> diagnostic) {
	if (diagnostic.getKind() == Diagnostic.Kind.ERROR) {
	errDiags = errDiags
	.append(diagnostic.getMessage(Locale.getDefault()));
	errorFound = true;
	}
	}

	String printDiags() {
	StringBuilder buf = new StringBuilder();
	for (String s : errDiags) {
	buf.append(s);
	buf.append("\n");
	}
	return buf.toString();
	}
	}

	//number of bytecode checks made while running combo tests
	static AtomicInteger bytecodeCheckCount = new AtomicInteger();

	}