Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/tools/Tool.java @ 11060:068b406e307f
7060111: race condition in VMError::report_and_die()
Reviewed-by: zgu, coleenp
Contributed-by: volker.simonis@gmail.com
author | fparain |
---|---|
date | Mon, 01 Jul 2013 09:13:19 +0000 |
parents | 38ea2efa32a7 |
children | 7fe6ef09d242 |
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/* * Copyright (c) 2002, 2004, 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. * */ package sun.jvm.hotspot.tools; import java.io.PrintStream; import java.util.Hashtable; import sun.jvm.hotspot.*; import sun.jvm.hotspot.runtime.*; import sun.jvm.hotspot.debugger.*; // generic command line or GUI tool. // override run & code main as shown below. public abstract class Tool implements Runnable { private HotSpotAgent agent; private JVMDebugger jvmDebugger; private int debugeeType; // debugeeType is one of constants below protected static final int DEBUGEE_PID = 0; protected static final int DEBUGEE_CORE = 1; protected static final int DEBUGEE_REMOTE = 2; public Tool() { } public Tool(JVMDebugger d) { jvmDebugger = d; } public String getName() { return getClass().getName(); } protected boolean needsJavaPrefix() { return true; } protected void setAgent(HotSpotAgent a) { agent = a; } protected void setDebugeeType(int dt) { debugeeType = dt; } protected HotSpotAgent getAgent() { return agent; } protected int getDebugeeType() { return debugeeType; } protected void printUsage() { String name = null; if (needsJavaPrefix()) { name = "java " + getName(); } else { name = getName(); } System.out.println("Usage: " + name + " [option] <pid>"); System.out.println("\t\t(to connect to a live java process)"); System.out.println(" or " + name + " [option] <executable> <core>"); System.out.println("\t\t(to connect to a core file)"); System.out.println(" or " + name + " [option] [server_id@]<remote server IP or hostname>"); System.out.println("\t\t(to connect to a remote debug server)"); System.out.println(); System.out.println("where option must be one of:"); printFlagsUsage(); } protected void printFlagsUsage() { System.out.println(" -h | -help\tto print this help message"); } protected void usage() { printUsage(); } /* Derived class main should be of the following form: public static void main(String[] args) { <derived class> obj = new <derived class>; obj.start(args); } */ protected void stop() { if (agent != null) { agent.detach(); } } protected void start(String[] args) { if ((args.length < 1) || (args.length > 2)) { usage(); return; } // Attempt to handle -h or -help or some invalid flag if (args[0].startsWith("-")) { usage(); } PrintStream err = System.err; int pid = 0; String coreFileName = null; String executableName = null; String remoteServer = null; switch (args.length) { case 1: try { pid = Integer.parseInt(args[0]); debugeeType = DEBUGEE_PID; } catch (NumberFormatException e) { // try remote server remoteServer = args[0]; debugeeType = DEBUGEE_REMOTE; } break; case 2: executableName = args[0]; coreFileName = args[1]; debugeeType = DEBUGEE_CORE; break; default: usage(); } agent = new HotSpotAgent(); try { switch (debugeeType) { case DEBUGEE_PID: err.println("Attaching to process ID " + pid + ", please wait..."); agent.attach(pid); break; case DEBUGEE_CORE: err.println("Attaching to core " + coreFileName + " from executable " + executableName + ", please wait..."); agent.attach(executableName, coreFileName); break; case DEBUGEE_REMOTE: err.println("Attaching to remote server " + remoteServer + ", please wait..."); agent.attach(remoteServer); break; } } catch (DebuggerException e) { switch (debugeeType) { case DEBUGEE_PID: err.print("Error attaching to process: "); break; case DEBUGEE_CORE: err.print("Error attaching to core file: "); break; case DEBUGEE_REMOTE: err.print("Error attaching to remote server: "); break; } if (e.getMessage() != null) { err.print(e.getMessage()); e.printStackTrace(); } err.println(); return; } err.println("Debugger attached successfully."); startInternal(); } // When using an existing JVMDebugger. public void start() { if (jvmDebugger == null) { throw new RuntimeException("Tool.start() called with no JVMDebugger set."); } agent = new HotSpotAgent(); agent.attach(jvmDebugger); startInternal(); } // Remains of the start mechanism, common to both start methods. private void startInternal() { PrintStream err = System.err; VM vm = VM.getVM(); if (vm.isCore()) { err.println("Core build detected."); } else if (vm.isClientCompiler()) { err.println("Client compiler detected."); } else if (vm.isServerCompiler()) { err.println("Server compiler detected."); } else { throw new RuntimeException("Fatal error: " + "should have been able to detect core/C1/C2 build"); } String version = vm.getVMRelease(); if (version != null) { err.print("JVM version is "); err.println(version); } run(); } }