JStack.java

/*
 * Copyright (c) 2004, 2013, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
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package sun.jvm.hotspot.tools;

import sun.jvm.hotspot.debugger.JVMDebugger;

public class JStack extends Tool {
    public JStack(boolean mixedMode, boolean concurrentLocks) {
        this.mixedMode = mixedMode;
        this.concurrentLocks = concurrentLocks;
    }

    public JStack() {
        this(true, true);
    }

    public JStack(JVMDebugger d) {
        super(d);
    }

    protected boolean needsJavaPrefix() {
        return false;
    }

    @Override
    public String getName() {
        return "jstack";
    }

    protected void printFlagsUsage() {
       System.out.println("    -l\tto print java.util.concurrent locks");
       System.out.println("    -m\tto print both java and native frames (mixed mode)");
       super.printFlagsUsage();
    }

    public void run() {
        Tool tool = null;
        if (mixedMode) {
            tool = new PStack(false, concurrentLocks);
        } else {
            tool = new StackTrace(false, concurrentLocks);
        }
        tool.setAgent(getAgent());
        tool.setDebugeeType(getDebugeeType());
        tool.run();
    }

    public void runWithArgs(String... args) {
        int used = 0;
        for (int i = 0; i < args.length; i++) {
            if (args[i].equals("-m")) {
                mixedMode = true;
                used++;
            } else if (args[i].equals("-l")) {
                concurrentLocks = true;
                used++;
            }
        }

        if (used != 0) {
            String[] newArgs = new String[args.length - used];
            for (int i = 0; i < newArgs.length; i++) {
                newArgs[i] = args[i + used];
            }
            args = newArgs;
        }

        execute(args);
    }

    public static void main(String[] args) {
        JStack jstack = new JStack();
        jstack.runWithArgs(args);
    }

    private boolean mixedMode;
    private boolean concurrentLocks;
}