view agent/test/jdi/SASanityChecker.java @ 364:919e7959392a

6742641: G1: NullPointerException during GCOld Summary: An update buffer is not processed correctly, which causes roots into the collection set not to be scanned and, hence, for the heap to be corrupted. The cause is that an object is accessed after it has been explicitly deleted, which causes a race. Reviewed-by: jcoomes, ysr
author tonyp
date Mon, 22 Sep 2008 09:56:49 -0400
parents a61af66fc99e
children c18cbe5936b8
line wrap: on
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/*
 * Copyright 2003-2005 Sun Microsystems, Inc.  All Rights Reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 *
 */

import sun.jvm.hotspot.tools.*;
import sun.jvm.hotspot.runtime.*;
import java.io.*;
import java.util.*;
import java.util.jar.*;

/**
This is a sanity checking tool for Serviceability Agent. To use this class,
refer to sasanity.sh script in the current directory.
*/

public class SASanityChecker extends Tool {
  private static final String saJarName;
  private static final Map c2types;

  static {
     saJarName = System.getProperty("SASanityChecker.SAJarName", "sa-jdi.jar");
     c2types = new HashMap();
     Object value = new Object();
     c2types.put("sun.jvm.hotspot.code.ExceptionBlob", value);
     c2types.put("sun.jvm.hotspot.code.DeoptimizationBlob", value);
     c2types.put("sun.jvm.hotspot.code.UncommonTrapBlob", value);

  }

  public void run() {
     String classPath = System.getProperty("java.class.path");
     StringTokenizer st = new StringTokenizer(classPath, File.pathSeparator);
     String saJarPath = null;
     while (st.hasMoreTokens()) {
        saJarPath = st.nextToken();
        if (saJarPath.endsWith(saJarName)) {
           break;
        }
     }

     if (saJarPath == null) {
        throw new RuntimeException(saJarName + " is not the CLASSPATH");
     }

     String cpuDot = "." + VM.getVM().getCPU() + ".";
     String platformDot = "." + VM.getVM().getOS() + "_" + VM.getVM().getCPU() + ".";
     boolean isClient = VM.getVM().isClientCompiler();

     try {
        FileInputStream fis = new FileInputStream(saJarPath);
        JarInputStream jis = new JarInputStream(fis);
        JarEntry je = null;
        while ( (je = jis.getNextJarEntry()) != null) {
           String entryName = je.getName();
           int dotClassIndex = entryName.indexOf(".class");
           if (dotClassIndex == -1) {
              // skip non-.class stuff
              continue;
           }

           entryName = entryName.substring(0, dotClassIndex).replace('/', '.');

           // skip debugger, asm classes, type classes and jdi binding classes
           if (entryName.startsWith("sun.jvm.hotspot.debugger.") ||
               entryName.startsWith("sun.jvm.hotspot.asm.") ||
               entryName.startsWith("sun.jvm.hotspot.type.") ||
               entryName.startsWith("sun.jvm.hotspot.jdi.") ) {
              continue;
           }

           String runtimePkgPrefix = "sun.jvm.hotspot.runtime.";
           int runtimeIndex = entryName.indexOf(runtimePkgPrefix);
           if (runtimeIndex != -1) {
              // look for further dot. if there, it has to be sub-package.
              // in runtime sub-packages include only current platform classes.
              if (entryName.substring(runtimePkgPrefix.length() + 1, entryName.length()).indexOf('.') != -1) {
                 if (entryName.indexOf(cpuDot) == -1 &&
                     entryName.indexOf(platformDot) == -1) {
                    continue;
                 }
              }
           }

           if (isClient) {
              if (c2types.get(entryName) != null) {
                 continue;
              }
           } else {
              if (entryName.equals("sun.jvm.hotspot.c1.Runtime1")) {
                 continue;
              }
           }

           System.out.println("checking " + entryName + " ..");
           // force init of the class to uncover any vmStructs mismatch
           Class.forName(entryName);
        }
     } catch (Exception exp) {
        System.out.println();
        System.out.println("FAILED");
        System.out.println();
        throw new RuntimeException(exp.getMessage());
     }
     System.out.println();
     System.out.println("PASSED");
     System.out.println();
  }

  public static void main(String[] args) {
     SASanityChecker checker = new SASanityChecker();
     checker.start(args);
     checker.stop();
  }
}