Exception stack is corrupt when catching and storing the exception

[Morten Herman Langkjaer]

i have som code that does e number of operatoins, if any exception occurs
during the execution path, the exception is stored in a list, and in another
place, the errors are logged. for example, method a calls b, that calls c. c
throws an exception, that b stores. When using the exception.ToString(), only
method b and c appears in the stack trace. Sine the method is called from
several locations, i cannot find the execution paths without attaching a
debugger. Is this a feature/bug in the framework. Can anyone help me get the
full stack trace.

i have created a simple application that proves the problem, it is written
in C#, and is a console application. try reviewing the following:
using System;
using System.Diagnostics;

namespace testStack
{
class Program
{
static void Main(string[] args)
{
try
{
StoredErrorThrower();
}
catch( Exception e )
{
Console.Out.WriteLine();
Console.Out.WriteLine("Non stored exception stack trace");
Console.Out.WriteLine();
Console.Out.WriteLine(e);
}

Console.Out.WriteLine();
Console.Out.WriteLine();
Console.Out.WriteLine("Stored Exception stack trace:");
Console.Out.WriteLine();
Console.Out.WriteLine(error);

Console.Out.WriteLine();
Console.Out.WriteLine();
Console.Out.WriteLine("Stack frame from the stored exception handler");
Console.Out.WriteLine(frame);

}

private static void StoredErrorThrower()
{
try
{
throw new Exception("error");
}
catch( Exception e )
{
frame = new StackTrace();
error = e;
}
throw new Exception("error");
}
private static Exception error;
private static StackTrace frame;
}
}

 

[dlm@bypsoft]

Hi Morten,

have you tried to get full stack, debugging your code with SOS extensions enabled? With stack related commands (!clrstack, !dumpstack, !clrstack -p, !clrstack -l) you should get full picture of what's going on.

Best regards,
dlm@bypsoft
Compare SQL Server, MySQL and Oracle for free - DBTyP.NET
www.bypsoft.com

 

[Morten Herman Langkjaer]

The issue occurs in some production code, but i cant seem to reproduce the
exact error in my debug envorinment. Therefore i want to collect the errors
and then log them afterwards. But i can't seem to have full stack trace
logged, unless i create a new instance of the StackTrace class, bu sincte the
exceptions are a part of the public interface, i cannot just introduce the
combination of StackTrace and Exception without changing the interface.
Therefore i would like to know if there is any way to change the way .NET
calculate the stackTrace to enable full stack logging always.

Hi Morten,

have you tried to get full stack, debugging your code with SOS extensions enabled? With stack related commands (!clrstack, !dumpstack, !clrstack -p, !clrstack -l) you should get full picture of what's going on.

Best regards,
dlm@bypsoft
Compare SQL Server, MySQL and Oracle for free - DBTyP.NET
www.bypsoft.com

i have som code that does e number of operatoins, if any exception occurs
during the execution path, the exception is stored in a list, and in another
place, the errors are logged. for example, method a calls b, that calls c. c
throws an exception, that b stores. When using the exception.ToString(), only
method b and c appears in the stack trace. Sine the method is called from
several locations, i cannot find the execution paths without attaching a
debugger. Is this a feature/bug in the framework. Can anyone help me get the
full stack trace.

i have created a simple application that proves the problem, it is written
in C#, and is a console application. try reviewing the following:
using System;
using System.Diagnostics;

namespace testStack
{
class Program
{
static void Main(string[] args)
{
try
{
StoredErrorThrower();
}
catch( Exception e )
{
Console.Out.WriteLine();
Console.Out.WriteLine("Non stored exception stack trace");
Console.Out.WriteLine();
Console.Out.WriteLine(e);
}

Console.Out.WriteLine();
Console.Out.WriteLine();
Console.Out.WriteLine("Stored Exception stack trace:");
Console.Out.WriteLine();
Console.Out.WriteLine(error);

Console.Out.WriteLine();
Console.Out.WriteLine();
Console.Out.WriteLine("Stack frame from the stored exception handler");
Console.Out.WriteLine(frame);

}

private static void StoredErrorThrower()
{
try
{
throw new Exception("error");
}
catch( Exception e )
{
frame = new StackTrace();
error = e;
}
throw new Exception("error");
}
private static Exception error;
private static StackTrace frame;
}
}