Code:
/ 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. // [ResourceExposure(ResourceScope.None)] [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 [ResourceExposure(ResourceScope.Process)] [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) Debugger.Break(); else { if (Debugger.Launch() == false) { throw new InvalidOperationException( Environment.GetResourceString("InvalidOperation_DebuggerLaunchFailed")); } } break; } else if (iResult == AssertFilters.FailTerminate) { #if FEATURE_CORECLR // Hack: Until we figure out whether we'll include escalation policy in Silverlight, // just call Exit for now. Environment.Exit(COR_E_FAILFAST); #else // 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) Environment.Exit(COR_E_FAILFAST); else Environment.FailFast(message); #endif } else if (iResult == AssertFilters.FailIgnore) break; // 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 [ResourceExposure(ResourceScope.Process)] [MethodImplAttribute(MethodImplOptions.InternalCall)] 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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