1 /*
   2  * Copyright (c) 2014, 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 8033930 8033913
  27  * @summary bad formatting of StackMapTable entries
  28  * @modules jdk.compiler
  29  */
  30 
  31 import java.io.*;
  32 import java.util.*;
  33 
  34 public class StackMapTableTest {
  35     public static void main(String... args) throws Exception {
  36         new StackMapTableTest().run();
  37     }
  38 
  39     void run() throws Exception {
  40         String testClasses = System.getProperty("test.classes");
  41         String out = javap("-v", "-classpath", testClasses, A.class.getName());
  42 
  43         String nl = System.getProperty("line.separator");
  44         out = out.replaceAll(nl, "\n");
  45 
  46         if (out.contains("\n\n\n"))
  47             error("double blank line found");
  48 
  49         String expect =
  50             "      StackMapTable: number_of_entries = 2\n" +
  51             "        frame_type = 252 /* append */\n" +
  52             "          offset_delta = 2\n" +
  53             "          locals = [ int ]\n" +
  54             "        frame_type = 250 /* chop */\n" +
  55             "          offset_delta = 18\n";
  56         if (!out.contains(expect))
  57             error("expected text not found");
  58 
  59         if (errors > 0)
  60             throw new Exception(errors + " errors found");
  61     }
  62 
  63     String javap(String... args) throws Exception {
  64         StringWriter sw = new StringWriter();
  65         PrintWriter out = new PrintWriter(sw);
  66         int rc = com.sun.tools.javap.Main.run(args, out);
  67         out.close();
  68         System.out.println(sw.toString());
  69         if (rc < 0)
  70             throw new Exception("javap exited, rc=" + rc);
  71         return sw.toString();
  72     }
  73 
  74     void error(String msg) {
  75         System.out.println("Error: " + msg);
  76         errors++;
  77     }
  78 
  79     int errors;
  80 
  81     /** Simple test class to run through javap. */
  82     public class A {
  83         public void a() {
  84             for (int i = 0; i < 10; i++) {
  85                 System.out.println(i);
  86             }
  87         }
  88         public void b() {
  89         }
  90         public void c() {
  91         }
  92     }
  93 }