Рабочий пример CreateJobObject/SetInformationJobObject pinvoke в .net?
Я пытаюсь собрать рабочий пример pinvoke'ing CreateJobObject и SetInformationJobObject. Через различные поисковые запросы (включая российские и китайские сообщения!) Я объединил следующий код. Я думаю, что определение JOBOBJECT_BASIC_LIMIT_INFORMATION изменяется на платформе (32/64-бит). Кажется, что работает CreateJobObject/AssignProcessToJobObject. Ошибка SetInformationJobObject - с ошибкой 24 или 87.
Process myProcess // POPULATED SOMEWHERE ELSE
// Create Job & assign this process and another process to the job
IntPtr jobHandle = CreateJobObject( null , null );
AssignProcessToJobObject( jobHandle , myProcess.Handle );
AssignProcessToJobObject( jobHandle , Process.GetCurrentProcess().Handle );
// Ensure that killing one process kills the others
JOBOBJECT_BASIC_LIMIT_INFORMATION limits = new JOBOBJECT_BASIC_LIMIT_INFORMATION();
limits.LimitFlags = (short)LimitFlags.JOB_OBJECT_LIMIT_KILL_ON_JOB_CLOSE;
IntPtr pointerToJobLimitInfo = Marshal.AllocHGlobal( Marshal.SizeOf( limits ) );
Marshal.StructureToPtr( limits , pointerToJobLimitInfo , false );
SetInformationJobObject( job , JOBOBJECTINFOCLASS.JobObjectBasicLimitInformation , pionterToJobLimitInfo , ( uint )Marshal.SizeOf( limits ) )
...
[DllImport( "kernel32.dll" , EntryPoint = "CreateJobObjectW" , CharSet = CharSet.Unicode )]
public static extern IntPtr CreateJobObject( SecurityAttributes JobAttributes , string lpName );
public class SecurityAttributes
{
public int nLength; //Useless field = 0
public IntPtr pSecurityDescriptor; //хз))
public bool bInheritHandle; //Возможность наследования
public SecurityAttributes()
{
this.bInheritHandle = true;
this.nLength = 0;
this.pSecurityDescriptor = IntPtr.Zero;
}
}
[DllImport( "kernel32.dll" )]
static extern bool SetInformationJobObject( IntPtr hJob , JOBOBJECTINFOCLASS JobObjectInfoClass , IntPtr lpJobObjectInfo , uint cbJobObjectInfoLength );
public enum JOBOBJECTINFOCLASS
{
JobObjectAssociateCompletionPortInformation = 7 ,
JobObjectBasicLimitInformation = 2 ,
JobObjectBasicUIRestrictions = 4 ,
JobObjectEndOfJobTimeInformation = 6 ,
JobObjectExtendedLimitInformation = 9 ,
JobObjectSecurityLimitInformation = 5
}
[StructLayout( LayoutKind.Sequential )]
struct JOBOBJECT_BASIC_LIMIT_INFORMATION
{
public Int64 PerProcessUserTimeLimit;
public Int64 PerJobUserTimeLimit;
public Int16 LimitFlags;
public UIntPtr MinimumWorkingSetSize;
public UIntPtr MaximumWorkingSetSize;
public Int16 ActiveProcessLimit;
public Int64 Affinity;
public Int16 PriorityClass;
public Int16 SchedulingClass;
}
public enum LimitFlags
{
JOB_OBJECT_LIMIT_ACTIVE_PROCESS = 0x00000008 ,
JOB_OBJECT_LIMIT_AFFINITY = 0x00000010 ,
JOB_OBJECT_LIMIT_BREAKAWAY_OK = 0x00000800 ,
JOB_OBJECT_LIMIT_DIE_ON_UNHANDLED_EXCEPTION = 0x00000400 ,
JOB_OBJECT_LIMIT_JOB_MEMORY = 0x00000200 ,
JOB_OBJECT_LIMIT_JOB_TIME = 0x00000004 ,
JOB_OBJECT_LIMIT_KILL_ON_JOB_CLOSE = 0x00002000 ,
JOB_OBJECT_LIMIT_PRESERVE_JOB_TIME = 0x00000040 ,
JOB_OBJECT_LIMIT_PRIORITY_CLASS = 0x00000020 ,
JOB_OBJECT_LIMIT_PROCESS_MEMORY = 0x00000100 ,
JOB_OBJECT_LIMIT_PROCESS_TIME = 0x00000002 ,
JOB_OBJECT_LIMIT_SCHEDULING_CLASS = 0x00000080 ,
JOB_OBJECT_LIMIT_SILENT_BREAKAWAY_OK = 0x00001000 ,
JOB_OBJECT_LIMIT_WORKINGSET = 0x00000001
}
[DllImport( "kernel32.dll" )]
[return: MarshalAs( UnmanagedType.Bool )]
static extern bool AssignProcessToJobObject( IntPtr hJob , IntPtr hProcess );
[StructLayout( LayoutKind.Sequential )]
public struct SECURITY_ATTRIBUTES
{
public int nLength;
public IntPtr lpSecurityDescriptor;
public int bInheritHandle;
}
Ответы
Ответ 1
Это может быть немного поздно, но все же.
Я попробовал все примеры здесь, но никто не работал у меня в 32 и 64-битном режиме одновременно. Наконец, я должен был сам изучить все подписи и создать соответствующие подпрограммы PInvoke. Я думаю, кто-то еще мог бы найти это полезным.
Отказ от ответственности: решение основано на ответе Matt Howells.
using System;
using System.Diagnostics;
using System.Runtime.InteropServices;
namespace JobManagement
{
public class Job : IDisposable
{
[DllImport("kernel32.dll", CharSet = CharSet.Unicode)]
static extern IntPtr CreateJobObject(IntPtr a, string lpName);
[DllImport("kernel32.dll")]
static extern bool SetInformationJobObject(IntPtr hJob, JobObjectInfoType infoType, IntPtr lpJobObjectInfo, UInt32 cbJobObjectInfoLength);
[DllImport("kernel32.dll", SetLastError = true)]
static extern bool AssignProcessToJobObject(IntPtr job, IntPtr process);
[DllImport("kernel32.dll", SetLastError = true)]
[return: MarshalAs(UnmanagedType.Bool)]
static extern bool CloseHandle(IntPtr hObject);
private IntPtr handle;
private bool disposed;
public Job()
{
handle = CreateJobObject(IntPtr.Zero, null);
var info = new JOBOBJECT_BASIC_LIMIT_INFORMATION
{
LimitFlags = 0x2000
};
var extendedInfo = new JOBOBJECT_EXTENDED_LIMIT_INFORMATION
{
BasicLimitInformation = info
};
int length = Marshal.SizeOf(typeof(JOBOBJECT_EXTENDED_LIMIT_INFORMATION));
IntPtr extendedInfoPtr = Marshal.AllocHGlobal(length);
Marshal.StructureToPtr(extendedInfo, extendedInfoPtr, false);
if (!SetInformationJobObject(handle, JobObjectInfoType.ExtendedLimitInformation, extendedInfoPtr, (uint)length))
throw new Exception(string.Format("Unable to set information. Error: {0}", Marshal.GetLastWin32Error()));
}
public void Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
}
private void Dispose(bool disposing)
{
if (disposed)
return;
if (disposing) { }
Close();
disposed = true;
}
public void Close()
{
CloseHandle(handle);
handle = IntPtr.Zero;
}
public bool AddProcess(IntPtr processHandle)
{
return AssignProcessToJobObject(handle, processHandle);
}
public bool AddProcess(int processId)
{
return AddProcess(Process.GetProcessById(processId).Handle);
}
}
#region Helper classes
[StructLayout(LayoutKind.Sequential)]
struct IO_COUNTERS
{
public UInt64 ReadOperationCount;
public UInt64 WriteOperationCount;
public UInt64 OtherOperationCount;
public UInt64 ReadTransferCount;
public UInt64 WriteTransferCount;
public UInt64 OtherTransferCount;
}
[StructLayout(LayoutKind.Sequential)]
struct JOBOBJECT_BASIC_LIMIT_INFORMATION
{
public Int64 PerProcessUserTimeLimit;
public Int64 PerJobUserTimeLimit;
public UInt32 LimitFlags;
public UIntPtr MinimumWorkingSetSize;
public UIntPtr MaximumWorkingSetSize;
public UInt32 ActiveProcessLimit;
public UIntPtr Affinity;
public UInt32 PriorityClass;
public UInt32 SchedulingClass;
}
[StructLayout(LayoutKind.Sequential)]
public struct SECURITY_ATTRIBUTES
{
public UInt32 nLength;
public IntPtr lpSecurityDescriptor;
public Int32 bInheritHandle;
}
[StructLayout(LayoutKind.Sequential)]
struct JOBOBJECT_EXTENDED_LIMIT_INFORMATION
{
public JOBOBJECT_BASIC_LIMIT_INFORMATION BasicLimitInformation;
public IO_COUNTERS IoInfo;
public UIntPtr ProcessMemoryLimit;
public UIntPtr JobMemoryLimit;
public UIntPtr PeakProcessMemoryUsed;
public UIntPtr PeakJobMemoryUsed;
}
public enum JobObjectInfoType
{
AssociateCompletionPortInformation = 7,
BasicLimitInformation = 2,
BasicUIRestrictions = 4,
EndOfJobTimeInformation = 6,
ExtendedLimitInformation = 9,
SecurityLimitInformation = 5,
GroupInformation = 11
}
#endregion
}
Ответ 2
Существует сообщение, в котором используется apis, который вы пытаетесь использовать.
Возможно, вы сможете получить некоторое представление оттуда.
Убить дочерний процесс, когда родительский процесс убит
Ответ 3
Подводя итог, подписи, поставленные Александром Езутовым, работают как на x86, так и на x64. Подписи Matt Howells используют несколько UInt32, когда вместо этого следует использовать UIntPtr. Я использовал следующую подпись P/Invoke для CloseHandle, которая, кажется, работает нормально:
[DllImport("kernel32.dll", SetLastError = true)]
static extern bool CloseHandle(IntPtr hObject);
В app.manifest должно быть добавлено следующее сообщение:
<compatibility xmlns="urn:schemas-microsoft-com:compatibility.v1">
<application>
<!-- A list of all Windows versions that this application is designed to work with. Windows will automatically select the most compatible environment.-->
<!--The ID below indicates application support for Windows Vista -->
<supportedOS Id="{e2011457-1546-43c5-a5fe-008deee3d3f0}"/>
<!--The ID below indicates application support for Windows 7 -->
<supportedOS Id="{35138b9a-5d96-4fbd-8e2d-a2440225f93a}"/>
</application>
и, наконец, это не сработает (по крайней мере, под Win 7) при запуске из Visual Studio. Родительский процесс должен быть запущен из проводника Windows.
Ответ 4
Улучшение ответа Alexander, здесь версия, использующая SafeHandle
. Это CriticalFinalizerObject
, что делает работу с ручками намного более безопасной..NET API (например, класс Process
) всегда используют SafeHandle
с P/Invoke вместо IntPtr
s.
internal sealed class ChildProcessManager : IDisposable
{
private SafeJobHandle _handle;
private bool _disposed;
public ChildProcessManager()
{
_handle = new SafeJobHandle(CreateJobObject(IntPtr.Zero, null));
var info = new JOBOBJECT_BASIC_LIMIT_INFORMATION
{
LimitFlags = 0x2000
};
var extendedInfo = new JOBOBJECT_EXTENDED_LIMIT_INFORMATION
{
BasicLimitInformation = info
};
var length = Marshal.SizeOf(typeof(JOBOBJECT_EXTENDED_LIMIT_INFORMATION));
var extendedInfoPtr = Marshal.AllocHGlobal(length);
Marshal.StructureToPtr(extendedInfo, extendedInfoPtr, false);
if (!SetInformationJobObject(_handle, JobObjectInfoType.ExtendedLimitInformation, extendedInfoPtr,
(uint)length))
{
throw new InvalidOperationException($"Unable to set information. Error: {Marshal.GetLastWin32Error()}");
}
}
public void Dispose()
{
if (_disposed) return;
_handle.Dispose();
_handle = null;
_disposed = true;
}
private void ValidateDisposed()
{
if (_disposed) throw new ObjectDisposedException(nameof(ChildProcessManager));
}
public void AddProcess(SafeProcessHandle processHandle)
{
ValidateDisposed();
if (!AssignProcessToJobObject(_handle, processHandle))
{
throw new InvalidOperationException("Unable to add the process");
}
}
public void AddProcess(Process process)
{
AddProcess(process.SafeHandle);
}
public void AddProcess(int processId)
{
using (var process = Process.GetProcessById(processId))
{
AddProcess(process);
}
}
#region Safe Handle
// ReSharper disable once ClassNeverInstantiated.Local
private sealed class SafeJobHandle : SafeHandleZeroOrMinusOneIsInvalid
{
public SafeJobHandle(IntPtr handle) : base(true)
{
SetHandle(handle);
}
protected override bool ReleaseHandle()
{
return CloseHandle(handle);
}
[DllImport("kernel32", SetLastError = true)]
[ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
private static extern bool CloseHandle(IntPtr hObject);
}
#endregion
#region Win32
// ReSharper disable InconsistentNaming
[DllImport("kernel32", CharSet = CharSet.Unicode)]
private static extern IntPtr CreateJobObject(IntPtr a, string lpName);
[DllImport("kernel32")]
private static extern bool SetInformationJobObject(SafeJobHandle hJob, JobObjectInfoType infoType, IntPtr lpJobObjectInfo, uint cbJobObjectInfoLength);
[DllImport("kernel32", SetLastError = true)]
private static extern bool AssignProcessToJobObject(SafeJobHandle job, SafeProcessHandle process);
[StructLayout(LayoutKind.Sequential)]
internal struct IO_COUNTERS
{
public ulong ReadOperationCount;
public ulong WriteOperationCount;
public ulong OtherOperationCount;
public ulong ReadTransferCount;
public ulong WriteTransferCount;
public ulong OtherTransferCount;
}
[StructLayout(LayoutKind.Sequential)]
internal struct JOBOBJECT_BASIC_LIMIT_INFORMATION
{
public long PerProcessUserTimeLimit;
public long PerJobUserTimeLimit;
public uint LimitFlags;
public UIntPtr MinimumWorkingSetSize;
public UIntPtr MaximumWorkingSetSize;
public uint ActiveProcessLimit;
public UIntPtr Affinity;
public uint PriorityClass;
public uint SchedulingClass;
}
[StructLayout(LayoutKind.Sequential)]
public struct SECURITY_ATTRIBUTES
{
public uint nLength;
public IntPtr lpSecurityDescriptor;
public int bInheritHandle;
}
[StructLayout(LayoutKind.Sequential)]
internal struct JOBOBJECT_EXTENDED_LIMIT_INFORMATION
{
public JOBOBJECT_BASIC_LIMIT_INFORMATION BasicLimitInformation;
public IO_COUNTERS IoInfo;
public UIntPtr ProcessMemoryLimit;
public UIntPtr JobMemoryLimit;
public UIntPtr PeakProcessMemoryUsed;
public UIntPtr PeakJobMemoryUsed;
}
public enum JobObjectInfoType
{
AssociateCompletionPortInformation = 7,
BasicLimitInformation = 2,
BasicUIRestrictions = 4,
EndOfJobTimeInformation = 6,
ExtendedLimitInformation = 9,
SecurityLimitInformation = 5,
GroupInformation = 11
}
// ReSharper restore InconsistentNaming
#endregion
}