如何使用 powershell 获取线程等待原因？

Question

您好，我已尝试获取线程等待原因来监视线程。但无法得到正确的原因。

Get-Process -ProcessName NpService | Select-Object -ExpandProperty  Threads | Select-Object -Property ID ,  @{Label='WaitReasons';Expression={$.GetStatus(-Property WaitReason)}},  @{N='Current Date';E={ $(Get-Date -Format 'y-M-d H:mm:ss') }} , BasePriority , CurrentPriority , ThreadState , WaitReason , PriorityLevel , TotalProcessorTime , UserProcessorTime , PrivilegedProcessorTime  | ConvertTo-Csv -NoTypeInformation  

我得到了 Enum 的输出。但我需要枚举字符串值。所以我尝试创建一个 Swtich 语句，但我不知道如何从 Select-Object 调用它

 class ThreadStatus {

[string]GetStatus($threadId) {
    Write-Output $threadId
$CustomObj = New-Object -TypeName PSObject
 $Wait_ReasonValue  =""

switch($threadId)
{
    "EventPairHigh" {return "Waiting for event pair high.Event pairs are used to communicate with protected subsystems." ; break}
        "EventPairLow" { return "Waiting for event pair low. Event pairs are used to communicate with protected subsystems." ; break}
        #ExecutionDelay { $Wait_ReasonValue = "Thread execution is delayed." ; break}
        #Executive { $Wait_ReasonValue = "The thread is waiting for the scheduler." ; break}
        #FreePage { $Wait_ReasonValue = "Waiting for a free virtual memory page." ; break}
        #LpcReceive { $Wait_ReasonValue = "Waiting for a local procedure call to arrive."; break}
        #LpcReply { $Wait_ReasonValue = "Waiting for reply to a local procedure call to arrive." ; break}
       # PageIn { $Wait_ReasonPropertyValue = "Waiting for a virtual memory page to arrive in memory." ; break}
        #PageOut { $Wait_ReasonValue = "Waiting for a virtual memory page to be written to disk." ; break}
      #  Suspended { $Wait_ReasonValue = "Thread execution is suspended." ; break}
       # SystemAllocation { $Wait_ReasonValue = "Waiting for a memory allocation for its stack." ; break}
        #Unknown { $Wait_ReasonValue = "Waiting for an unknown reason." ; break}
        #UserRequest { $Wait_ReasonValue = "The thread is waiting for a user request." ; break}
        #VirtualMemory { $Wait_ReasonValue = "Waiting for the system to allocate virtual memory." ; break}

        Default { $Wait_ReasonValue = " " ; break }
        }
         # $CustomObj | Add-Member –MemberType NoteProperty –Name "WaitReason" –Value $Wait_ReasonValue  
        # $CustomObj
        # Write-Output "TEST"
       # Write-Output $Wait_ReasonValue 
        return ""

            }

} $tc = 新对象 -TypeName 线程状态 $tc.GetStatus("EventPairHigdh")

我需要在 Select-Object 中调用以下方法。

 $tc.GetStatus("EventPairHigh")

输出应该是这样的。

 Waiting for event pair high.Event pairs are used to communicate with protected subsystems.

当我尝试以下代码时，我没有得到 Process 的输出。

Get-Process -ProcessName Test | Select-Object @{Label='CMPNAME';Expression={$_.Name}}  -ExpandProperty Threads | Select-Object {$_.Id}

  OUTPUT :
         $_.Id
         -----
         8412
         10460
         10484
         10508
         10520
         10524

Answer 1

我得到了 Enum 的输出。但我需要枚举字符串值。

幸运的是，枚举值很容易转换为字符串：

... | Select-Object -Property ID,@{Label='WaitReasons';Expression={$_.WaitReason -as [string]}}, ...

---

如果你想使用类方法而不将其绑定到类的实例，则需要将其标记为static：

class ThreadStatus {
  static [string] GetStatus([System.Diagnostics.ThreadWaitReason]$threadId){
    ...
  }
}

# Now we can invoke the method like this:
... | Select-Object -Property ID,@{Label='WaitReasons';Expression={[ThreadStatus]::GetStatus($_.WaitReason)}}, ...