jdk8-mips64-public/langtools: test/tools/javac/varargs/7042566/T7042566.java@f497fac86cf9 (annotated)

test/tools/javac/varargs/7042566/T7042566.java@f497fac86cf9 (annotated)

test/tools/javac/varargs/7042566/T7042566.java

Thu, 25 Aug 2011 17:18:25 -0700

author: schien
date: Thu, 25 Aug 2011 17:18:25 -0700
changeset 1067: f497fac86cf9
parent 1006: a2d422d480cb
child 1482: 954541f13717
permissions: -rw-r--r--

Added tag jdk8-b02 for changeset b3c059de2a61

 /*
  * Copyright (c) 2011, 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
  */
 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.api.JavacTool;
 import com.sun.tools.javac.util.List;
 import java.io.File;
 import java.net.URI;
 import java.util.Arrays;
 import java.util.Locale;
 import javax.tools.Diagnostic;
 import javax.tools.JavaCompiler;
 import javax.tools.JavaFileObject;
 import javax.tools.SimpleJavaFileObject;
 import javax.tools.StandardJavaFileManager;
 import javax.tools.ToolProvider;
 public class T7042566 {
     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;
     }
     void compileAndCheck() throws Exception {
         final JavaCompiler tool = ToolProvider.getSystemJavaCompiler();
         JavaSource source = new JavaSource();
         ErrorChecker ec = new ErrorChecker();
         JavacTask ct = (JavacTask)tool.getTask(null, fm, ec,
                 null, null, Arrays.asList(source));
         ct.call();
         check(source, ec);
     }
     void check(JavaSource source, ErrorChecker ec) {
         checkCount++;
         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);
         }
     }
     void verifyBytecode(VarargsMethod selected, JavaSource source) {
         bytecodeCheckCount++;
         File compiledTest = new File("Test.class");
         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 {\n" +
                 "   #V1\n" +
                 "   #V2\n" +
                 "   void test() { m(#E); }\n" +
                 "}";
         String source;
         public JavaSource() {
             super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE);
             source = source_template.replaceAll("#V1", m1.toString()).
                     replaceAll("#V2", m2.toString()).
                     replaceAll("#E", actuals.expressionListStr);
         }
         @Override
         public CharSequence getCharContent(boolean ignoreEncodingErrors) {
             return source;
         }
     }
     /** global decls ***/
     // Create a single file manager and reuse it for each compile to save time.
     static StandardJavaFileManager fm = JavacTool.create().getStandardFileManager(null, null, null);
     //statistics
     static int checkCount = 0;
     static int bytecodeCheckCount = 0;
     public static void main(String... args) throws Exception {
         for (TypeConfiguration tconf1 : TypeConfiguration.values()) {
             for (TypeConfiguration tconf2 : TypeConfiguration.values()) {
                 for (TypeConfiguration tconf3 : TypeConfiguration.values()) {
                     new T7042566(tconf1, tconf2, tconf3).compileAndCheck();
                 }
             }
         }
         System.out.println("Total checks made: " + checkCount);
         System.out.println("Bytecode checks made: " + bytecodeCheckCount);
     }
     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();
         }
     }
 }

Mercurial > jdk8-mips64-public > langtools / annotate

test/tools/javac/varargs/7042566/T7042566.java@f497fac86cf9 (annotated)

test/tools/javac/varargs/7042566/T7042566.java