1 /*
   2  * Copyright (c) 2016, 2017, 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 6479237
  27  * @summary Basic test StackTraceElement with class loader names
  28  * @library lib /lib/testlibrary
  29  * @modules jdk.compiler
  30  * @build m1/* WithClassLoaderName
  31  * @run main/othervm m1/com.app.Main
  32  * @run main/othervm WithClassLoaderName
  33  */
  34 
  35 import java.lang.reflect.InvocationTargetException;
  36 import java.lang.reflect.Method;
  37 import java.net.URL;
  38 import java.net.URLClassLoader;
  39 import java.nio.file.Path;
  40 import java.nio.file.Paths;
  41 
  42 import com.app.Utils;
  43 
  44 public class WithClassLoaderName {
  45     private static final String TEST_SRC = System.getProperty("test.src");
  46     private static final String SRC_FILENAME = "WithClassLoaderName.java";
  47 
  48     private static final Path SRC_DIR = Paths.get(TEST_SRC, "src");
  49     private static final Path CLASSES_DIR = Paths.get("classes");
  50     private static final String THROW_EXCEPTION_CLASS = "p.ThrowException";
  51 
  52     public static void main(String... args) throws Exception {
  53         /*
  54          * Test the following frames both have the same class loader name "app"
  55          *   com.app.Test::test
  56          *   WithClassLoaderName::test
  57          */
  58         Utils.verify(WithClassLoaderName.class, "app", "main", SRC_FILENAME);
  59 
  60         /*
  61          * Test StackTraceElement for a class loaded by a named URLClassLoader
  62          */
  63         compile();
  64         testURLClassLoader("myloader");
  65 
  66         // loader name same as application class loader
  67         testURLClassLoader("app");
  68     }
  69 
  70     private static void compile() throws Exception {
  71         boolean rc = CompilerUtils.compile(SRC_DIR, CLASSES_DIR);
  72         if (!rc) {
  73             throw new RuntimeException("compilation fails");
  74         }
  75     }
  76 
  77     public static void testURLClassLoader(String loaderName) throws Exception {
  78         System.err.println("---- test URLClassLoader name: " + loaderName);
  79 
  80         URL[] urls = new URL[] { CLASSES_DIR.toUri().toURL() };
  81         ClassLoader parent = ClassLoader.getSystemClassLoader();
  82         URLClassLoader loader = new URLClassLoader(loaderName, urls, parent);
  83 
  84         Class<?> c = Class.forName(THROW_EXCEPTION_CLASS, true, loader);
  85         Method method = c.getMethod("throwError");
  86         try {
  87             // invoke p.ThrowException::throwError
  88             method.invoke(null);
  89         } catch (InvocationTargetException x) {
  90             Throwable e = x.getCause();
  91             e.printStackTrace();
  92 
  93             StackTraceElement[] stes = e.getStackTrace();
  94             StackWalker.StackFrame[] frames = new StackWalker.StackFrame[] {
  95                 Utils.makeStackFrame(c, "throwError", "ThrowException.java"),
  96                 Utils.makeStackFrame(WithClassLoaderName.class, "testURLClassLoader",
  97                                      SRC_FILENAME),
  98                 Utils.makeStackFrame(WithClassLoaderName.class, "main", SRC_FILENAME),
  99             };
 100 
 101             // p.ThrowException.throwError
 102             Utils.checkFrame(loaderName, frames[0], stes[0]);
 103             // skip reflection frames
 104             int i = 1;
 105             while (i < stes.length) {
 106                 String cn = stes[i].getClassName();
 107                 if (!cn.startsWith("java.lang.reflect.") &&
 108                     !cn.startsWith("jdk.internal.reflect."))
 109                     break;
 110                 i++;
 111             }
 112             // WithClassLoaderName.testURLClassLoader
 113             Utils.checkFrame("app", frames[1], stes[i]);
 114 
 115             // WithClassLoaderName.main
 116             Utils.checkFrame("app", frames[2], stes[i+1]);
 117 
 118         }
 119     }
 120 
 121 }
 122