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