| /* |
| * Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| *com.sun.tools.attach.AttachNotSupportedException |
| |
| * 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. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * 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.tools.jcmd; |
| |
| import java.io.InputStream; |
| import java.io.IOException; |
| import java.io.UnsupportedEncodingException; |
| import java.util.List; |
| import java.util.ArrayList; |
| import java.util.Comparator; |
| import java.net.URISyntaxException; |
| |
| import com.sun.tools.attach.VirtualMachine; |
| import com.sun.tools.attach.VirtualMachineDescriptor; |
| import com.sun.tools.attach.AgentLoadException; |
| import com.sun.tools.attach.AttachNotSupportedException; |
| import sun.tools.attach.HotSpotVirtualMachine; |
| import sun.tools.jstat.JStatLogger; |
| import sun.jvmstat.monitor.Monitor; |
| import sun.jvmstat.monitor.MonitoredHost; |
| import sun.jvmstat.monitor.MonitoredVm; |
| import sun.jvmstat.monitor.MonitoredVmUtil; |
| import sun.jvmstat.monitor.MonitorException; |
| import sun.jvmstat.monitor.VmIdentifier; |
| |
| public class JCmd { |
| public static void main(String[] args) { |
| Arguments arg = null; |
| try { |
| arg = new Arguments(args); |
| } catch (IllegalArgumentException ex) { |
| System.err.println("Error parsing arguments: " + ex.getMessage() |
| + "\n"); |
| Arguments.usage(); |
| System.exit(1); |
| } |
| |
| if (arg.isShowUsage()) { |
| Arguments.usage(); |
| System.exit(1); |
| } |
| |
| if (arg.isListProcesses()) { |
| List<VirtualMachineDescriptor> vmds = VirtualMachine.list(); |
| for (VirtualMachineDescriptor vmd : vmds) { |
| System.out.println(vmd.id() + " " + vmd.displayName()); |
| } |
| System.exit(0); |
| } |
| |
| List<String> pids = new ArrayList<String>(); |
| if (arg.getPid() == 0) { |
| // find all VMs |
| List<VirtualMachineDescriptor> vmds = VirtualMachine.list(); |
| for (VirtualMachineDescriptor vmd : vmds) { |
| if (!isJCmdProcess(vmd)) { |
| pids.add(vmd.id()); |
| } |
| } |
| } else if (arg.getProcessSubstring() != null) { |
| // use the partial class-name match |
| List<VirtualMachineDescriptor> vmds = VirtualMachine.list(); |
| for (VirtualMachineDescriptor vmd : vmds) { |
| if (isJCmdProcess(vmd)) { |
| continue; |
| } |
| try { |
| String mainClass = getMainClass(vmd); |
| if (mainClass != null |
| && mainClass.indexOf(arg.getProcessSubstring()) != -1) { |
| pids.add(vmd.id()); |
| } |
| } catch (MonitorException|URISyntaxException e) { |
| if (e.getMessage() != null) { |
| System.err.println(e.getMessage()); |
| } else { |
| Throwable cause = e.getCause(); |
| if ((cause != null) && (cause.getMessage() != null)) { |
| System.err.println(cause.getMessage()); |
| } else { |
| e.printStackTrace(); |
| } |
| } |
| } |
| } |
| if (pids.isEmpty()) { |
| System.err.println("Could not find any processes matching : '" |
| + arg.getProcessSubstring() + "'"); |
| System.exit(1); |
| } |
| } else if (arg.getPid() == -1) { |
| System.err.println("Invalid pid specified"); |
| System.exit(1); |
| } else { |
| // Use the found pid |
| pids.add(arg.getPid() + ""); |
| } |
| |
| for (String pid : pids) { |
| System.out.println(pid + ":"); |
| if (arg.isListCounters()) { |
| listCounters(pid); |
| } else { |
| try { |
| executeCommandForPid(pid, arg.getCommand()); |
| } catch(Exception ex) { |
| ex.printStackTrace(); |
| } |
| } |
| } |
| } |
| |
| private static void executeCommandForPid(String pid, String command) |
| throws AttachNotSupportedException, IOException, |
| UnsupportedEncodingException { |
| VirtualMachine vm = VirtualMachine.attach(pid); |
| |
| // Cast to HotSpotVirtualMachine as this is an |
| // implementation specific method. |
| HotSpotVirtualMachine hvm = (HotSpotVirtualMachine) vm; |
| String lines[] = command.split("\\n"); |
| for (String line : lines) { |
| if (line.trim().equals("stop")) { |
| break; |
| } |
| try (InputStream in = hvm.executeJCmd(line);) { |
| // read to EOF and just print output |
| byte b[] = new byte[256]; |
| int n; |
| do { |
| n = in.read(b); |
| if (n > 0) { |
| String s = new String(b, 0, n, "UTF-8"); |
| System.out.print(s); |
| } |
| } while (n > 0); |
| } |
| } |
| vm.detach(); |
| } |
| |
| private static void listCounters(String pid) { |
| // Code from JStat (can't call it directly since it does System.exit) |
| VmIdentifier vmId = null; |
| try { |
| vmId = new VmIdentifier(pid); |
| } catch (URISyntaxException e) { |
| System.err.println("Malformed VM Identifier: " + pid); |
| return; |
| } |
| try { |
| MonitoredHost monitoredHost = MonitoredHost.getMonitoredHost(vmId); |
| MonitoredVm monitoredVm = monitoredHost.getMonitoredVm(vmId, -1); |
| JStatLogger logger = new JStatLogger(monitoredVm); |
| logger.printSnapShot("\\w*", // all names |
| new AscendingMonitorComparator(), // comparator |
| false, // not verbose |
| true, // show unsupported |
| System.out); |
| monitoredHost.detach(monitoredVm); |
| } catch (MonitorException ex) { |
| ex.printStackTrace(); |
| } |
| } |
| |
| private static boolean isJCmdProcess(VirtualMachineDescriptor vmd) { |
| try { |
| String mainClass = getMainClass(vmd); |
| return mainClass != null && mainClass.equals(JCmd.class.getName()); |
| } catch (URISyntaxException|MonitorException ex) { |
| return false; |
| } |
| } |
| |
| private static String getMainClass(VirtualMachineDescriptor vmd) |
| throws URISyntaxException, MonitorException { |
| try { |
| String mainClass = null; |
| VmIdentifier vmId = new VmIdentifier(vmd.id()); |
| MonitoredHost monitoredHost = MonitoredHost.getMonitoredHost(vmId); |
| MonitoredVm monitoredVm = monitoredHost.getMonitoredVm(vmId, -1); |
| mainClass = MonitoredVmUtil.mainClass(monitoredVm, true); |
| monitoredHost.detach(monitoredVm); |
| return mainClass; |
| } catch(NullPointerException e) { |
| // There is a potential race, where a running java app is being |
| // queried, unfortunately the java app has shutdown after this |
| // method is started but before getMonitoredVM is called. |
| // If this is the case, then the /tmp/hsperfdata_xxx/pid file |
| // will have disappeared and we will get a NullPointerException. |
| // Handle this gracefully.... |
| return null; |
| } |
| } |
| |
| /** |
| * Class to compare two Monitor objects by name in ascending order. |
| * (from jstat) |
| */ |
| static class AscendingMonitorComparator implements Comparator<Monitor> { |
| |
| public int compare(Monitor m1, Monitor m2) { |
| String name1 = m1.getName(); |
| String name2 = m2.getName(); |
| return name1.compareTo(name2); |
| } |
| } |
| } |