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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
namespace System.Diagnostics {
using System;
using System.IO;
using System.Reflection;
using System.Runtime.CompilerServices;
using System.Runtime.Versioning;
using System.Diagnostics.Contracts;
using System.Diagnostics.CodeAnalysis;
// 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
{
internal const int COR_E_FAILFAST = unchecked((int) 0x80131623);
private static AssertFilter Filter;
static Assert()
{
Filter = new DefaultFilter();
}
// Called when an assertion is being made.
//
internal static void Check(bool condition, String conditionString, String message)
{
if (!condition)
{
Fail (conditionString, message, null, COR_E_FAILFAST);
}
}
internal static void Fail(String conditionString, String message)
{
Fail(conditionString, message, null, COR_E_FAILFAST);
}
internal static void Fail(String conditionString, String message, String windowTitle, int exitCode)
{
Fail(conditionString, message, windowTitle, exitCode, StackTrace.TraceFormat.Normal, 0);
}
internal static void Fail(String conditionString, String message, int exitCode, StackTrace.TraceFormat stackTraceFormat)
{
Fail(conditionString, message, null, exitCode, stackTraceFormat, 0);
}
internal static void Fail(String conditionString, String message, String windowTitle, int exitCode, StackTrace.TraceFormat stackTraceFormat, int numStackFramesToSkip)
{
// get the stacktrace
StackTrace st = new StackTrace(numStackFramesToSkip, true);
AssertFilters iResult = Filter.AssertFailure (conditionString, message, st, stackTraceFormat, windowTitle);
if (iResult == AssertFilters.FailDebug)
{
if (Debugger.IsAttached == true)
Debugger.Break();
else
{
if (Debugger.Launch() == false)
{
throw new InvalidOperationException(
Environment.GetResourceString("InvalidOperation_DebuggerLaunchFailed"));
}
}
}
else if (iResult == AssertFilters.FailTerminate)
{
// We want to exit the Silverlight application, after displaying a message.
// Our best known way to emulate this is to exit the process with a known
// error code. Jolt may not be prepared for an appdomain to be unloaded.
Environment._Exit(exitCode);
}
}
// Called when an assert happens.
// windowTitle can be null.
[MethodImplAttribute(MethodImplOptions.InternalCall)]
internal extern static int ShowDefaultAssertDialog(String conditionString, String message, String stackTrace, String windowTitle);
}
}
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