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.jdeps/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 }