/// <summary>
/// Creates threads dump and try to mimic JVM stack trace as much as possible to allow existing analytics tools to be used
/// </summary>
/// <param name="threadMxBean"> bean to use for thread dump </param>
/// <param name="systemProperties"> dumped vm system properties </param>
/// <returns> string that contains thread dump </returns>
public static string ThreadDump(ThreadMXBean threadMxBean, Properties systemProperties)
{
ThreadInfo[] threadInfos = threadMxBean.dumpAllThreads(true, true);
// Reproduce JVM stack trace as far as possible to allow existing analytics tools to be used
string vmName = systemProperties.getProperty("java.vm.name");
string vmVersion = systemProperties.getProperty("java.vm.version");
string vmInfoString = systemProperties.getProperty("java.vm.info");
StringBuilder sb = new StringBuilder();
sb.Append(string.Format("Full thread dump {0} ({1} {2}):\n\n", vmName, vmVersion, vmInfoString));
foreach (ThreadInfo threadInfo in threadInfos)
{
sb.Append(string.Format("\"{0}\" #{1:D}\n", threadInfo.ThreadName, threadInfo.ThreadId));
sb.Append(" java.lang.Thread.State: ").Append(threadInfo.ThreadState).Append("\n");
StackTraceElement[] stackTrace = threadInfo.StackTrace;
for (int i = 0; i < stackTrace.Length; i++)
{
StackTraceElement e = stackTrace[i];
sb.Append("\tat ").Append(e.ToString()).Append('\n');
// First stack element info can be found in the thread state
if (i == 0 && threadInfo.LockInfo != null)
{
Thread.State ts = threadInfo.ThreadState;
switch (ts)
{
case BLOCKED:
sb.Append("\t- blocked on ").Append(threadInfo.LockInfo).Append('\n');
break;
case WAITING:
sb.Append("\t- waiting on ").Append(threadInfo.LockInfo).Append('\n');
break;
case TIMED_WAITING:
sb.Append("\t- waiting on ").Append(threadInfo.LockInfo).Append('\n');
break;
default:
break;
}
}
foreach (MonitorInfo mi in threadInfo.LockedMonitors)
{
if (mi.LockedStackDepth == i)
{
sb.Append("\t- locked ").Append(mi).Append('\n');
}
}
}
}
return(sb.ToString());
}
/*
* Constructs a <tt>ThreadInfo</tt> object from a
* {@link CompositeData CompositeData}.
*/
private ThreadInfo(CompositeData cd)
{
ThreadInfoCompositeData ticd = ThreadInfoCompositeData.getInstance(cd);
ThreadId_Renamed = ticd.threadId();
ThreadName_Renamed = ticd.threadName();
BlockedTime_Renamed = ticd.blockedTime();
BlockedCount_Renamed = ticd.blockedCount();
WaitedTime_Renamed = ticd.waitedTime();
WaitedCount_Renamed = ticd.waitedCount();
LockName_Renamed = ticd.lockName();
LockOwnerId_Renamed = ticd.lockOwnerId();
LockOwnerName_Renamed = ticd.lockOwnerName();
ThreadState_Renamed = ticd.threadState();
Suspended_Renamed = ticd.suspended();
InNative_Renamed = ticd.inNative();
StackTrace_Renamed = ticd.stackTrace();
// 6.0 attributes
if (ticd.CurrentVersion)
{
@lock = ticd.lockInfo();
LockedMonitors_Renamed = ticd.lockedMonitors();
LockedSynchronizers_Renamed = ticd.lockedSynchronizers();
}
else
{
// lockInfo is a new attribute added in 1.6 ThreadInfo
// If cd is a 5.0 version, construct the LockInfo object
// from the lockName value.
if (LockName_Renamed != null)
{
String[] result = LockName_Renamed.Split("@");
if (result.Length == 2)
{
int identityHashCode = Convert.ToInt32(result[1], 16);
@lock = new LockInfo(result[0], identityHashCode);
}
else
{
Debug.Assert(result.Length == 2);
@lock = null;
}
}
else
{
@lock = null;
}
LockedMonitors_Renamed = EMPTY_MONITORS;
LockedSynchronizers_Renamed = EMPTY_SYNCS;
}
}
/// <summary>Print all of the thread's information and stack traces.</summary>
/// <param name="stream">the stream to</param>
/// <param name="title">a string title for the stack trace</param>
public static void PrintThreadInfo(TextWriter stream, string title)
{
lock (typeof(ReflectionUtils))
{
int StackDepth = 20;
bool contention = threadBean.IsThreadContentionMonitoringEnabled();
long[] threadIds = threadBean.GetAllThreadIds();
stream.WriteLine("Process Thread Dump: " + title);
stream.WriteLine(threadIds.Length + " active threads");
foreach (long tid in threadIds)
{
ThreadInfo info = threadBean.GetThreadInfo(tid, StackDepth);
if (info == null)
{
stream.WriteLine(" Inactive");
continue;
}
stream.WriteLine("Thread " + GetTaskName(info.GetThreadId(), info.GetThreadName()
) + ":");
Thread.State state = info.GetThreadState();
stream.WriteLine(" State: " + state);
stream.WriteLine(" Blocked count: " + info.GetBlockedCount());
stream.WriteLine(" Waited count: " + info.GetWaitedCount());
if (contention)
{
stream.WriteLine(" Blocked time: " + info.GetBlockedTime());
stream.WriteLine(" Waited time: " + info.GetWaitedTime());
}
if (state == Thread.State.Waiting)
{
stream.WriteLine(" Waiting on " + info.GetLockName());
}
else
{
if (state == Thread.State.Blocked)
{
stream.WriteLine(" Blocked on " + info.GetLockName());
stream.WriteLine(" Blocked by " + GetTaskName(info.GetLockOwnerId(), info.GetLockOwnerName
()));
}
}
stream.WriteLine(" Stack:");
foreach (StackTraceElement frame in info.GetStackTrace())
{
stream.WriteLine(" " + frame.ToString());
}
}
stream.Flush();
}
}
public static void AwaitThreadState(Thread thread, long maxWaitMillis, Thread.State first, params Thread.State[] rest)
{
EnumSet <Thread.State> set = EnumSet.of(first, rest);
long deadline = maxWaitMillis + DateTimeHelper.CurrentUnixTimeMillis();
Thread.State currentState;
do
{
currentState = thread.State;
if (DateTimeHelper.CurrentUnixTimeMillis() > deadline)
{
throw new AssertionError("Timed out waiting for thread state of <" + set + ">: " + thread + " (state = " + thread.State + ")");
}
} while (!set.contains(currentState));
}
/// <summary>
/// Initialize ThreadInfo object
/// </summary>
/// <param name="t"> Thread </param>
/// <param name="state"> Thread state </param>
/// <param name="lockObj"> Object on which the thread is blocked </param>
/// <param name="lockOwner"> the thread holding the lock </param>
/// <param name="blockedCount"> Number of times blocked to enter a lock </param>
/// <param name="blockedTime"> Approx time blocked to enter a lock </param>
/// <param name="waitedCount"> Number of times waited on a lock </param>
/// <param name="waitedTime"> Approx time waited on a lock </param>
/// <param name="stackTrace"> Thread stack trace </param>
/// <param name="lockedMonitors"> List of locked monitors </param>
/// <param name="lockedSynchronizers"> List of locked synchronizers </param>
private void Initialize(Thread t, int state, Object lockObj, Thread lockOwner, long blockedCount, long blockedTime, long waitedCount, long waitedTime, StackTraceElement[] stackTrace, MonitorInfo[] lockedMonitors, LockInfo[] lockedSynchronizers)
{
this.ThreadId_Renamed = t.Id;
this.ThreadName_Renamed = t.Name;
this.ThreadState_Renamed = ManagementFactoryHelper.toThreadState(state);
this.Suspended_Renamed = ManagementFactoryHelper.isThreadSuspended(state);
this.InNative_Renamed = ManagementFactoryHelper.isThreadRunningNative(state);
this.BlockedCount_Renamed = blockedCount;
this.BlockedTime_Renamed = blockedTime;
this.WaitedCount_Renamed = waitedCount;
this.WaitedTime_Renamed = waitedTime;
if (lockObj == null)
{
this.@lock = null;
this.LockName_Renamed = null;
}
else
{
this.@lock = new LockInfo(lockObj);
this.LockName_Renamed = @lock.ClassName + '@' + @lock.IdentityHashCode.ToString("x");
}
if (lockOwner == null)
{
this.LockOwnerId_Renamed = -1;
this.LockOwnerName_Renamed = null;
}
else
{
this.LockOwnerId_Renamed = lockOwner.Id;
this.LockOwnerName_Renamed = lockOwner.Name;
}
if (stackTrace == null)
{
this.StackTrace_Renamed = NO_STACK_TRACE;
}
else
{
this.StackTrace_Renamed = stackTrace;
}
this.LockedMonitors_Renamed = lockedMonitors;
this.LockedSynchronizers_Renamed = lockedSynchronizers;
}
private void DoThreadUpdates()
{
ThreadMXBean threadMXBean = ManagementFactory.GetThreadMXBean();
long[] threadIds = threadMXBean.GetAllThreadIds();
ThreadInfo[] threadInfos = threadMXBean.GetThreadInfo(threadIds, 0);
int threadsNew = 0;
int threadsRunnable = 0;
int threadsBlocked = 0;
int threadsWaiting = 0;
int threadsTimedWaiting = 0;
int threadsTerminated = 0;
foreach (ThreadInfo threadInfo in threadInfos)
{
// threadInfo is null if the thread is not alive or doesn't exist
if (threadInfo == null)
{
continue;
}
Thread.State state = threadInfo.GetThreadState();
if (state == Thread.State.New)
{
threadsNew++;
}
else
{
if (state == Thread.State.Runnable)
{
threadsRunnable++;
}
else
{
if (state == Thread.State.Blocked)
{
threadsBlocked++;
}
else
{
if (state == Thread.State.Waiting)
{
threadsWaiting++;
}
else
{
if (state == Thread.State.TimedWaiting)
{
threadsTimedWaiting++;
}
else
{
if (state == Thread.State.Terminated)
{
threadsTerminated++;
}
}
}
}
}
}
}
metrics.SetMetric("threadsNew", threadsNew);
metrics.SetMetric("threadsRunnable", threadsRunnable);
metrics.SetMetric("threadsBlocked", threadsBlocked);
metrics.SetMetric("threadsWaiting", threadsWaiting);
metrics.SetMetric("threadsTimedWaiting", threadsTimedWaiting);
metrics.SetMetric("threadsTerminated", threadsTerminated);
}
/// <summary>
/// Returns a string representation of this thread info.
/// The format of this string depends on the implementation.
/// The returned string will typically include
/// the <seealso cref="#getThreadName thread name"/>,
/// the <seealso cref="#getThreadId thread ID"/>,
/// its <seealso cref="#getThreadState state"/>,
/// and a <seealso cref="#getStackTrace stack trace"/> if any.
/// </summary>
/// <returns> a string representation of this thread info. </returns>
public override String ToString()
{
StringBuilder sb = new StringBuilder("\"" + ThreadName + "\"" + " Id=" + ThreadId + " " + ThreadState);
if (LockName != null)
{
sb.Append(" on " + LockName);
}
if (LockOwnerName != null)
{
sb.Append(" owned by \"" + LockOwnerName + "\" Id=" + LockOwnerId);
}
if (Suspended)
{
sb.Append(" (suspended)");
}
if (InNative)
{
sb.Append(" (in native)");
}
sb.Append('\n');
int i = 0;
for (; i < StackTrace_Renamed.Length && i < MAX_FRAMES; i++)
{
StackTraceElement ste = StackTrace_Renamed[i];
sb.Append("\tat " + ste.ToString());
sb.Append('\n');
if (i == 0 && LockInfo != null)
{
Thread.State ts = ThreadState;
switch (ts.InnerEnumValue())
{
case Thread.State.InnerEnum.BLOCKED:
sb.Append("\t- blocked on " + LockInfo);
sb.Append('\n');
break;
case Thread.State.InnerEnum.WAITING:
sb.Append("\t- waiting on " + LockInfo);
sb.Append('\n');
break;
case Thread.State.InnerEnum.TIMED_WAITING:
sb.Append("\t- waiting on " + LockInfo);
sb.Append('\n');
break;
default:
break;
}
}
foreach (MonitorInfo mi in LockedMonitors_Renamed)
{
if (mi.LockedStackDepth == i)
{
sb.Append("\t- locked " + mi);
sb.Append('\n');
}
}
}
if (i < StackTrace_Renamed.Length)
{
sb.Append("\t...");
sb.Append('\n');
}
LockInfo[] locks = LockedSynchronizers;
if (locks.Length > 0)
{
sb.Append("\n\tNumber of locked synchronizers = " + locks.Length);
sb.Append('\n');
foreach (LockInfo li in locks)
{
sb.Append("\t- " + li);
sb.Append('\n');
}
}
sb.Append('\n');
return(sb.ToString());
}
public override bool Test(Thread thread)
{
Thread.State threadState = thread.State;
SeenStates.Add(threadState);
return(PossibleStates.Contains(threadState));
}
