I get System.OutOfMemoryExceptionin this line of code:
mutex2 = new Mutex(true, "Name2");
Here is the stack:
{"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
This will happen only when I use avatar. Without impersonation (it works on my regular Windows account) it will work fine. The impersonation output looks something like this:
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();
EDIT . I am just creating automated tests for legacy code. I would remove the use of mutexes if I could. I am currently studying SecurityCriticalAttributein the Mutex constructor.
EDIT2 . Here is a complete code example:
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();
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);
}
}
}