【发布时间】：2016-12-14 10:35:34
【问题描述】：
我在这行代码中得到了System.OutOfMemoryException：
mutex2 = new Mutex(true, "Name2");
这是堆栈跟踪：
{"Exception of type 'System.OutOfMemoryException' was thrown."}
at Microsoft.Win32.Win32Native.CreateMutex(SECURITY_ATTRIBUTES lpSecurityAttributes, Boolean initialOwner, String name)
at System.Threading.Mutex.CreateMutexHandle(Boolean initiallyOwned, String name, SECURITY_ATTRIBUTES securityAttribute, SafeWaitHandle& mutexHandle)
at System.Threading.Mutex.MutexTryCodeHelper.MutexTryCode(Object userData)
at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData)
at System.Threading.Mutex.CreateMutexWithGuaranteedCleanup(Boolean initiallyOwned, String name, Boolean& createdNew, SECURITY_ATTRIBUTES secAttrs)
at System.Threading.Mutex..ctor(Boolean initiallyOwned, String name, Boolean& createdNew, MutexSecurity mutexSecurity)
at System.Threading.Mutex..ctor(Boolean initiallyOwned, String name)
at Foo.FooDefinitions.FooManager.FooForm.FooForm_Load(Object sender, EventArgs e) in c:\tfs\DWS\TRUNK\DEV\FooDefinitions\FooManager\FooForm.cs:line 92
只有在我使用模拟时才会发生。如果没有模拟（在我的普通 Windows 帐户上运行），它将运行良好。模仿是这样的：
if (!NativeMethods.LogonUser(userName, domainName, password, 2, 0, ref this._tokenHandle)) // [DllImport("advapi32.dll", SetLastError = true, CharSet = CharSet.Auto)]
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
this._impersonatedUser = new WindowsIdentity(this._tokenHandle).Impersonate();
编辑：为了详细说明，我正在对遗留代码创建自动化测试。如果可以的话，我会删除互斥锁的使用。我目前正在调查 Mutex 构造函数上的SecurityCriticalAttribute。
EDIT2：这是完整的代码示例：
using Microsoft.VisualStudio.TestTools.UnitTesting;
using System;
using System.ComponentModel;
using System.Net;
using System.Runtime.InteropServices;
using System.Security.Principal;
using System.Threading;
namespace ReinierDG.MutexTesting
{
[TestClass]
public class MutexTest
{
[TestMethod]
public void CreateMutexUnderImpersonation()
{
var credentials = new NetworkCredential("testagent", "secretpassword");
var tokenHandle = new IntPtr();
if (!NativeMethods.LogonUser(credentials.UserName, credentials.Domain, credentials.Password, 2, 0, ref tokenHandle))
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
var impersonatedUser = new WindowsIdentity(tokenHandle).Impersonate();
// this will run indefinately or untill memory is full with 1 cpu core at 100%
var mutex = new Mutex(true, "test");
}
internal static class NativeMethods
{
[DllImport("advapi32.dll", SetLastError = true, CharSet = CharSet.Auto)]
internal static extern bool LogonUser([MarshalAs(UnmanagedType.LPWStr)]string lpszUsername, [MarshalAs(UnmanagedType.LPWStr)]string lpszDomain, [MarshalAs(UnmanagedType.LPWStr)]string lpszPassword, int dwLogonType, int dwLogonProvider, ref IntPtr phToken);
}
}
}
【问题讨论】：
标签： c# .net out-of-memory mutex impersonation