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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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
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package sun.tools.common;

import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.stream.Collectors;

import com.sun.tools.attach.VirtualMachine;
import com.sun.tools.attach.VirtualMachineDescriptor;

import sun.jvmstat.monitor.MonitorException;
import sun.jvmstat.monitor.MonitoredHost;
import sun.jvmstat.monitor.MonitoredVm;
import sun.jvmstat.monitor.MonitoredVmUtil;
import sun.jvmstat.monitor.VmIdentifier;

Class for finding process matching a process argument, excluding tool it self and returning a list containing the process identifiers.
/** * Class for finding process matching a process argument, * excluding tool it self and returning a list containing * the process identifiers. */
public class ProcessArgumentMatcher { private String matchClass; private String singlePid; public ProcessArgumentMatcher(String pidArg) { if (pidArg == null || pidArg.isEmpty()) { throw new IllegalArgumentException("Pid string is invalid"); } if (pidArg.charAt(0) == '-') { throw new IllegalArgumentException("Unrecognized " + pidArg); } try { long pid = Long.parseLong(pidArg); if (pid != 0) { singlePid = String.valueOf(pid); } } catch (NumberFormatException nfe) { matchClass = pidArg; } } private static String getExcludeStringFrom(Class<?> excludeClass) { if (excludeClass == null) { return ""; } Module m = excludeClass.getModule(); if (m.isNamed()) { return m.getName() + "/" + excludeClass.getName(); } return excludeClass.getName(); } private static boolean check(VirtualMachineDescriptor vmd, String excludeClass, String partialMatch) { // Try to get the main class name using (platform specific) ProcessHelper String mainClass = ProcessHelper.getMainClass(vmd.id()); // If the main class name could not be retrieved by ProcessHelper, get it with the attach mechanism if (mainClass == null) { try { 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); } catch (NullPointerException npe) { // 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 false; } catch (MonitorException | URISyntaxException e) { return false; } } if (excludeClass != null && mainClass.equals(excludeClass)) { return false; } if (partialMatch != null && mainClass.indexOf(partialMatch) == -1) { return false; } return true; } private static Collection<VirtualMachineDescriptor> getSingleVMD(String pid) { Collection<VirtualMachineDescriptor> vids = new ArrayList<>(); List<VirtualMachineDescriptor> vmds = VirtualMachine.list(); for (VirtualMachineDescriptor vmd : vmds) { if (check(vmd, null, null)) { if (pid.equals(vmd.id())) { vids.add(vmd); } } } return vids; } private static Collection<VirtualMachineDescriptor> getVMDs(Class<?> excludeClass, String partialMatch) { String excludeCls = getExcludeStringFrom(excludeClass); Collection<VirtualMachineDescriptor> vids = new ArrayList<>(); List<VirtualMachineDescriptor> vmds = VirtualMachine.list(); for (VirtualMachineDescriptor vmd : vmds) { if (check(vmd, excludeCls, partialMatch)) { vids.add(vmd); } } return vids; } public Collection<VirtualMachineDescriptor> getVirtualMachineDescriptors() { if (singlePid != null) { return getSingleVMD(singlePid); } else { return getVMDs(null, matchClass); } } public Collection<String> getVirtualMachinePids(Class<?> excludeClass) { if (singlePid != null) { // There is a bug in AttachProvider, when VM is debuggee-suspended it's not listed by the AttachProvider. // If we are talking about a specific pid, just return it. return List.of(singlePid); } else { return getVMDs(excludeClass, matchClass).stream().map(x -> {return x.id();}).collect(Collectors.toList()); } } }