Mercurial > jdk8-mips64-public > langtools / file revision

 /*

  * Copyright (c) 2009, 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.

  */

 import java.io.*;

 import com.sun.tools.classfile.*;

 /*

  * @test

  * @bug 6843077

  * @summary test that typecasts annotation are emitted if only the cast

  *          expression is optimized away

  */

 public class TypeCasts {

     public static void main(String[] args) throws Exception {

         new TypeCasts().run();

     }

     public void run() throws Exception {

         File javaFile = writeTestFile();

         File classFile = compileTestFile(javaFile);

         ClassFile cf = ClassFile.read(classFile);

         for (Method m: cf.methods) {

             test(cf, m);

         }

         countAnnotations();

         if (errors > 0)

             throw new Exception(errors + " errors found");

         System.out.println("PASSED");

     }

     void test(ClassFile cf, Method m) {

         test(cf, m, Attribute.RuntimeVisibleTypeAnnotations, true);

         test(cf, m, Attribute.RuntimeInvisibleTypeAnnotations, false);

     }

     // test the result of Attributes.getIndex according to expectations

     // encoded in the method's name

     void test(ClassFile cf, Method m, String name, boolean visible) {

         Attribute attr = null;

         Code_attribute cAttr = null;

         int index = m.attributes.getIndex(cf.constant_pool, Attribute.Code);

         if(index!= -1) {

             attr = m.attributes.get(index);

             assert attr instanceof Code_attribute;

             cAttr = (Code_attribute)attr;

             index = cAttr.attributes.getIndex(cf.constant_pool, name);

             if(index!= -1) {

                 attr = cAttr.attributes.get(index);

                 assert attr instanceof RuntimeTypeAnnotations_attribute;

                 RuntimeTypeAnnotations_attribute tAttr = (RuntimeTypeAnnotations_attribute)attr;

                 all += tAttr.annotations.length;

                 if (visible)

                     visibles += tAttr.annotations.length;

                 else

                     invisibles += tAttr.annotations.length;

                }

         }

     }

     File writeTestFile() throws IOException {

         File f = new File("Test.java");

         PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter(f)));

         out.println("import java.lang.annotation.*;");

         out.println("class Test { ");

         out.println("  @Target(ElementType.TYPE_USE) @interface A { }");

         out.println("  void emit() {");

         out.println("    Object o = null;");

         out.println("    String s = null;");

         out.println("    String a0 = (@A String)o;");

         out.println("    Object a1 = (@A Object)o;");

         out.println("    String b0 = (@A String)s;");

         out.println("    Object b1 = (@A Object)s;");

         out.println("  }");

         out.println("  void alldeadcode() {");

         out.println("    Object o = null;");

         out.println("    if (false) {");

         out.println("      String a0 = (@A String)o;");

         out.println("    }");

         out.println("  }");

         out.println("}");

         out.close();

         return f;

     }

     File compileTestFile(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");

     }

     void countAnnotations() {

         int expected_visibles = 0, expected_invisibles = 4;

         int expected_all = expected_visibles + expected_invisibles;

         if (expected_all != all) {

             errors++;

             System.err.println("expected " + expected_all

                     + " annotations but found " + all);

         }

         if (expected_visibles != visibles) {

             errors++;

             System.err.println("expected " + expected_visibles

                     + " visibles annotations but found " + visibles);

         }

         if (expected_invisibles != invisibles) {

             errors++;

             System.err.println("expected " + expected_invisibles

                     + " invisibles annotations but found " + invisibles);

         }

     }

     int errors;

     int all;

     int visibles;

     int invisibles;

 }