Assert.cs source code in C# .NET

Source code for the .NET framework in C#



/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / clr / src / BCL / System / Diagnostics / Assert.cs / 1305376 / Assert.cs

                            // ==++== 
//   Copyright (c) Microsoft Corporation.  All rights reserved.
// ==--== 
namespace System.Diagnostics {
    using System; 
    using System.Security.Permissions; 
    using System.IO;
    using System.Reflection; 
    using System.Runtime.CompilerServices;
    using System.Runtime.Versioning;
    using System.Diagnostics.Contracts;
    // Class which handles code asserts.  Asserts are used to explicitly protect
    // assumptions made in the code.  In general if an assert fails, it indicates 
    // a program bug so is immediately called to the attention of the user. 
    // Only static data members, does not need to be marked with the serializable attribute
    internal static class Assert 
        private const int COR_E_FAILFAST = unchecked((int) 0x80131623);
        private static AssertFilter[] ListOfFilters;
        private static int iNumOfFilters; 
        private static int iFilterArraySize;
        static Assert() 
            Assert.AddFilter(new DefaultFilter()); 

        // AddFilter adds a new assert filter. This replaces the current
        // filter, unless the filter returns FailContinue. 
        internal static void AddFilter(AssertFilter filter) 
            if (iFilterArraySize <= iNumOfFilters)
                AssertFilter[] newFilterArray = new AssertFilter[iFilterArraySize+2];

                if (iNumOfFilters > 0)
                    Array.Copy(ListOfFilters, newFilterArray, iNumOfFilters); 

                iFilterArraySize += 2; 
                ListOfFilters = newFilterArray;

            ListOfFilters [iNumOfFilters++] = filter;
        // Called when an assertion is being made.
        [ResourceConsumption(ResourceScope.Process, ResourceScope.Process)]
        internal static void Check(bool condition, String conditionString, String message) 
            if (!condition)
                Fail (conditionString, message); 
        [System.Security.SecuritySafeCritical]  // auto-generated
        [ResourceConsumption(ResourceScope.Machine, ResourceScope.Process)]
        internal static void Fail(String conditionString, String message)
            // get the stacktrace 
            StackTrace st = new StackTrace();
            // Run through the list of filters backwards (the last filter in the list 
            // is the default filter. So we're guaranteed that there will be atleast
            // one filter to handle the assert. 

            int iTemp = iNumOfFilters;
            while (iTemp > 0)

                AssertFilters iResult = ListOfFilters [--iTemp].AssertFailure (conditionString, message, st); 
                if (iResult == AssertFilters.FailDebug)
                    if (Debugger.IsAttached == true)
                        if (Debugger.Launch() == false)
                            throw new InvalidOperationException( 

                else if (iResult == AssertFilters.FailTerminate)
                    // Hack: Until we figure out whether we'll include escalation policy in Silverlight,
                    // just call Exit for now. 
                    // This assert dialog will be common for code contract failures.  If a code contract failure
                    // occurs on an end user machine, we believe the right experience is to do a FailFast, which 
                    // will report this error via Watson, so someone could theoretically fix the bug.
                    // However, in CLR v4, Environment.FailFast when a debugger is attached gives you an MDA 
                    // saying you've hit a bug in the runtime or unsafe managed code, and this is most likely caused 
                    // by heap corruption or a stack imbalance from COM Interop or P/Invoke.  That extremely
                    // misleading error isn't right, and we can temporarily work around this by using Environment.Exit 
                    // if a debugger is attached.  The right fix is to plumb FailFast correctly through our native
                    // Watson code, adding in a TypeOfReportedError for fatal managed errors.  We may want a contract-
                    // specific code path as well, using COR_E_CODECONTRACTFAILED.
                    if (Debugger.IsAttached) 
                else if (iResult == AssertFilters.FailIgnore)

                // If none of the above, it means that the Filter returned FailContinue. 
                // So invoke the next filter.
      // Called when an assert happens.
      [System.Security.SecurityCritical]  // auto-generated
      internal extern static int ShowDefaultAssertDialog(String conditionString, String message, String stackTrace); 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.


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