1 /*
   2  * Copyright (c) 2010, 2015, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /*
  25  * @test
  26  * @bug 6943289
  27  * @summary  Project Coin: Improved Exception Handling for Java (aka 'multicatch')
  28  * @modules jdk.compiler/com.sun.tools.classfile
  29  * @run main Pos05
  30  */
  31 
  32 import com.sun.tools.classfile.Attribute;
  33 import com.sun.tools.classfile.ClassFile;
  34 import com.sun.tools.classfile.Code_attribute;
  35 import com.sun.tools.classfile.Code_attribute.Exception_data;
  36 import com.sun.tools.classfile.Method;
  37 import java.io.*;
  38 
  39 public class Pos05 {
  40 
  41     static class Pos05sub {
  42 
  43         class A extends Exception {}
  44         class B extends Exception {}
  45         class C extends Exception {}
  46 
  47         void test(boolean b1, boolean b2) {
  48             try {
  49                 if (b1) {
  50                     throw new A();
  51                 }
  52                 else if (b2) {
  53                     throw new B();
  54                 }
  55                 else {
  56                     throw new C();
  57                 }
  58             }
  59             catch (final A | B | C ex) {
  60                 System.out.println("Exception caught");
  61             }
  62         }
  63     }
  64 
  65     static final int TYPES_IN_MULTICATCH = 3;
  66     static final String SUBTEST_NAME = Pos05sub.class.getName() + ".class";
  67     static final String TEST_METHOD_NAME = "test";
  68 
  69     public static void main(String... args) throws Exception {
  70         new Pos05().run();
  71     }
  72 
  73     public void run() throws Exception {
  74         String workDir = System.getProperty("test.classes");
  75         File compiledTest = new File(workDir, SUBTEST_NAME);
  76         verifyMulticatchExceptionRanges(compiledTest);
  77     }
  78 
  79     void verifyMulticatchExceptionRanges(File f) {
  80         System.err.println("verify: " + f);
  81         try {
  82             int count = 0;
  83             ClassFile cf = ClassFile.read(f);
  84             Method testMethod = null;
  85             for (Method m : cf.methods) {
  86                 if (m.getName(cf.constant_pool).equals(TEST_METHOD_NAME)) {
  87                     testMethod = m;
  88                     break;
  89                 }
  90             }
  91             if (testMethod == null) {
  92                 throw new Error("Test method not found");
  93             }
  94             Code_attribute ea = (Code_attribute)testMethod.attributes.get(Attribute.Code);
  95             if (testMethod == null) {
  96                 throw new Error("Code attribute for test() method not found");
  97             }
  98             Exception_data firstExceptionTable = null;
  99             for (int i = 0 ; i < ea.exception_table_length; i++) {
 100                 if (firstExceptionTable == null) {
 101                     firstExceptionTable = ea.exception_table[i];
 102                 }
 103                 if (ea.exception_table[i].handler_pc != firstExceptionTable.handler_pc ||
 104                         ea.exception_table[i].start_pc != firstExceptionTable.start_pc ||
 105                         ea.exception_table[i].end_pc != firstExceptionTable.end_pc) {
 106                     throw new Error("Multiple overlapping catch clause found in generated code");
 107                 }
 108                 count++;
 109             }
 110             if (count != TYPES_IN_MULTICATCH) {
 111                 throw new Error("Wrong number of exception data found: " + count);
 112             }
 113         } catch (Exception e) {
 114             e.printStackTrace();
 115             throw new Error("error reading " + f +": " + e);
 116         }
 117     }
 118 }