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Meinrad Recheis

2009-Feb-17 22:36 UTC

[Ironruby-core] hosting: howto get the nice ruby backtrace on exception thrown from ruby?

hello,

I am now currently using this ugly hack to get a reasonable (let''s say
user
friendly) exception backtrace from an error in executed code:

        public object Execute(string code, ScriptScope scope)
        {
            code = @"begin
_=(
"+code+@"
)
rescue Exception
self.__message__=$!.message.to_clr_string
self.__backtrace__ = $!.backtrace
throw
end";
            object result = null;
            try
            {
                LogManager.GetLogger("Ruby").Debug("\r\n" +
code);
                result = m_engine.Execute(code, scope);

            }
            catch (Exception e)
            {
                var backtrace
scope.GetVariable<RubyArray>("__backtrace__");
                string msg =
scope.GetVariable<string>("__message__")
+"\r\n" + string.Join("\r\n", backtrace.Select(s =>
s.ToString()).ToArray());

                LogManager.GetLogger("Ruby").Error(msg);
            }
            return result;
        }
Even though it seems to work well I am absolutely not satisfied with it. Is
there a better way to do this?
-- henon
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Meinrad Recheis

2009-Feb-18 09:24 UTC

head link

[Ironruby-core] hosting: howto get the nice ruby backtrace on exception thrown from ruby?

I''ve given it some thought. I would like to avoid wrapping the code in
"begin - rescue" and instead catch the exception in c#. Then just send
the
ruby methods "message" and "backtrace" to the
Ruby-exception-object from C#.
How would that be done?
Any other hints?-- Henon

On Tue, Feb 17, 2009 at 11:36 PM, Meinrad Recheis <meinrad.recheis at
gmail.com> wrote:
> hello,
>
> I am now currently using this ugly hack to get a reasonable (let''s
say user
> friendly) exception backtrace from an error in executed code:
>
>         public object Execute(string code, ScriptScope scope)
>         {
>             code = @"begin
> _=(
> "+code+@"
> )
> rescue Exception
> self.__message__=$!.message.to_clr_string
> self.__backtrace__ = $!.backtrace
> throw
> end";
>             object result = null;
>             try
>             {
>                
LogManager.GetLogger("Ruby").Debug("\r\n" + code);
>                 result = m_engine.Execute(code, scope);
>
>             }
>             catch (Exception e)
>             {
>                 var backtrace >
scope.GetVariable<RubyArray>("__backtrace__");
>                 string msg =
scope.GetVariable<string>("__message__")
> +"\r\n" + string.Join("\r\n", backtrace.Select(s =>
> s.ToString()).ToArray());
>
>                 LogManager.GetLogger("Ruby").Error(msg);
>             }
>             return result;
>         }
> Even though it seems to work well I am absolutely not satisfied with it. Is
> there a better way to do this?
> -- henon
>-------------- next part --------------
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Tomas Matousek

2009-Feb-19 02:30 UTC

head link

[Ironruby-core] hosting: howto get the nice ruby backtrace on exception thrown from ruby?

You can use ExceptionService:

        var engine = Ruby.CreateEngine();
        try {
            engine.Execute(@"
def foo
  goo
end

def goo
  raise ''hello''
end

foo
");
        } catch (Exception e) {
            var exceptionService =
engine.GetService<ExceptionOperations>();
            string message, typeName;
            exceptionService.GetExceptionMessage(e, out message, out typeName);
            Console.WriteLine(message);
            Console.WriteLine(typeName);
            Console.WriteLine(exceptionService.FormatException(e));
        }

The current implementation is not ideal. If you''re missing some
features on the service let us know. We might consider adding them.

Tomas

From: ironruby-core-bounces at rubyforge.org [mailto:ironruby-core-bounces at
rubyforge.org] On Behalf Of Meinrad Recheis
Sent: Wednesday, February 18, 2009 1:25 AM
To: ironruby-core
Subject: Re: [Ironruby-core] hosting: howto get the nice ruby backtrace on
exception thrown from ruby?

I''ve given it some thought. I would like to avoid wrapping the code in
"begin - rescue" and instead catch the exception in c#. Then just send
the ruby methods "message" and "backtrace" to the
Ruby-exception-object from C#. How would that be done?
Any other hints?
-- Henon
On Tue, Feb 17, 2009 at 11:36 PM, Meinrad Recheis <meinrad.recheis at
gmail.com<mailto:meinrad.recheis at gmail.com>> wrote:
hello,

I am now currently using this ugly hack to get a reasonable (let''s say
user friendly) exception backtrace from an error in executed code:
        public object Execute(string code, ScriptScope scope)
        {
            code = @"begin
_=(
"+code+@"
)
rescue Exception
self.__message__=$!.message.to_clr_string
self.__backtrace__ = $!.backtrace
throw
end";
            object result = null;
            try
            {
                LogManager.GetLogger("Ruby").Debug("\r\n" +
code);
                result = m_engine.Execute(code, scope);

            }
            catch (Exception e)
            {
                var backtrace =
scope.GetVariable<RubyArray>("__backtrace__");
                string msg =
scope.GetVariable<string>("__message__") +"\r\n" +
string.Join("\r\n", backtrace.Select(s => s.ToString()).ToArray());

                LogManager.GetLogger("Ruby").Error(msg);
            }
            return result;
        }

Even though it seems to work well I am absolutely not satisfied with it. Is
there a better way to do this?
-- henon

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Meinrad Recheis

2009-Feb-19 09:06 UTC

head link

[Ironruby-core] hosting: howto get the nice ruby backtrace on exception thrown from ruby?

Thanks Thomas, thats very good. As for a suggestion about ExceptionService
features: It would be quite useful to retrieve the exception backtrace as
string[] in order to be able format it to one''s needs. For instance, I
like
using the VisualStudio error parser to be able to jump from the backtrace in
the output right into the right line in the source file (see my blog post:
http://www.eqqon.com/index.php/Navigating_in_Exception_Stack_Traces_in_Visual_C-Sharp).
To do that, currently, I would need to parse the formatted backtrace and
re-format it. No big deal. Just would be nice to have.

Cheers,
-- henon

On Thu, Feb 19, 2009 at 3:30 AM, Tomas Matousek <
Tomas.Matousek at microsoft.com> wrote:
>  You can use ExceptionService:
>
>
>
>         var engine = Ruby.CreateEngine();
>
>         try {
>
>             engine.Execute(@"
>
> def foo
>
>   goo
>
> end
>
>
>
> def goo
>
>   raise ''hello''
>
> end
>
>
>
> foo
>
> ");
>
>         } catch (Exception e) {
>
>             var exceptionService = engine.GetService<ExceptionOperations
> >();
>
>             string message, typeName;
>
>             exceptionService.GetExceptionMessage(e, out message,
outtypeName);
>
>             Console.WriteLine(message);
>
>             Console.WriteLine(typeName);
>
>             Console.WriteLine(exceptionService.FormatException(e));
>
>         }
>
>
>
> The current implementation is not ideal. If you''re missing some
features on
> the service let us know. We might consider adding them.
>
>
>
> Tomas
>
>
>
> *From:* ironruby-core-bounces at rubyforge.org [mailto:
> ironruby-core-bounces at rubyforge.org] *On Behalf Of *Meinrad Recheis
> *Sent:* Wednesday, February 18, 2009 1:25 AM
> *To:* ironruby-core
> *Subject:* Re: [Ironruby-core] hosting: howto get the nice ruby backtrace
> on exception thrown from ruby?
>
>
>
> I''ve given it some thought. I would like to avoid wrapping the
code in
> "begin - rescue" and instead catch the exception in c#. Then just
send the
> ruby methods "message" and "backtrace" to the
Ruby-exception-object from C#.
> How would that be done?
> Any other hints?
>
> -- Henon
>
> On Tue, Feb 17, 2009 at 11:36 PM, Meinrad Recheis <
> meinrad.recheis at gmail.com> wrote:
>
> hello,
>
> I am now currently using this ugly hack to get a reasonable (let''s
say user
> friendly) exception backtrace from an error in executed code:
>
>         public object Execute(string code, ScriptScope scope)
>
>         {
>
>             code = @"begin
>
> _=(
>
> "+code+@"
>
> )
>
> rescue Exception
>
> self.__message__=$!.message.to_clr_string
>
> self.__backtrace__ = $!.backtrace
>
> throw
>
> end";
>
>             object result = null;
>
>             try
>
>             {
>
>                
LogManager.GetLogger("Ruby").Debug("\r\n" + code);
>
>                 result = m_engine.Execute(code, scope);
>
>
>
>             }
>
>             catch (Exception e)
>
>             {
>
>                 var backtrace >
scope.GetVariable<RubyArray>("__backtrace__");
>
>                 string msg =
scope.GetVariable<string>("__message__")
> +"\r\n" + string.Join("\r\n", backtrace.Select(s =>
> s.ToString()).ToArray());
>
>
>
>                 LogManager.GetLogger("Ruby").Error(msg);
>
>             }
>
>             return result;
>
>         }
>
>
>
> Even though it seems to work well I am absolutely not satisfied with it. Is
> there a better way to do this?
> -- henon
>
>
>
> _______________________________________________
> Ironruby-core mailing list
> Ironruby-core at rubyforge.org
> http://rubyforge.org/mailman/listinfo/ironruby-core
>
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Tomas Matousek

2009-Feb-19 17:10 UTC

head link

[Ironruby-core] hosting: howto get the nice ruby backtrace on exception thrown from ruby?

I completely agree with that. I think we should add a method GetStackTrace()
that returns an instance of some StackTrace class, which is an array of
StackFrames, where StackFrame is some struct/class that contains method name,
file name and line number.

Tomas

From: ironruby-core-bounces at rubyforge.org [mailto:ironruby-core-bounces at
rubyforge.org] On Behalf Of Meinrad Recheis
Sent: Thursday, February 19, 2009 1:06 AM
To: ironruby-core at rubyforge.org
Subject: Re: [Ironruby-core] hosting: howto get the nice ruby backtrace on
exception thrown from ruby?

Thanks Thomas, thats very good. As for a suggestion about ExceptionService
features: It would be quite useful to retrieve the exception backtrace as
string[] in order to be able format it to one''s needs. For instance, I
like using the VisualStudio error parser to be able to jump from the backtrace
in the output right into the right line in the source file (see my blog post:
http://www.eqqon.com/index.php/Navigating_in_Exception_Stack_Traces_in_Visual_C-Sharp).
To do that, currently, I would need to parse the formatted backtrace and
re-format it. No big deal. Just would be nice to have.

Cheers,
-- henon

On Thu, Feb 19, 2009 at 3:30 AM, Tomas Matousek <Tomas.Matousek at
microsoft.com<mailto:Tomas.Matousek at microsoft.com>> wrote:

You can use ExceptionService:



        var engine = Ruby.CreateEngine();

        try {

            engine.Execute(@"

def foo

  goo

end



def goo

  raise ''hello''

end



foo

");

        } catch (Exception e) {

            var exceptionService =
engine.GetService<ExceptionOperations>();

            string message, typeName;

            exceptionService.GetExceptionMessage(e, out message, out typeName);

            Console.WriteLine(message);

            Console.WriteLine(typeName);

            Console.WriteLine(exceptionService.FormatException(e));

        }



The current implementation is not ideal. If you''re missing some
features on the service let us know. We might consider adding them.



Tomas



From: ironruby-core-bounces at rubyforge.org<mailto:ironruby-core-bounces at
rubyforge.org> [mailto:ironruby-core-bounces at
rubyforge.org<mailto:ironruby-core-bounces at rubyforge.org>] On Behalf Of
Meinrad Recheis
Sent: Wednesday, February 18, 2009 1:25 AM
To: ironruby-core
Subject: Re: [Ironruby-core] hosting: howto get the nice ruby backtrace on
exception thrown from ruby?



I''ve given it some thought. I would like to avoid wrapping the code in
"begin - rescue" and instead catch the exception in c#. Then just send
the ruby methods "message" and "backtrace" to the
Ruby-exception-object from C#. How would that be done?
Any other hints?

-- Henon

On Tue, Feb 17, 2009 at 11:36 PM, Meinrad Recheis <meinrad.recheis at
gmail.com<mailto:meinrad.recheis at gmail.com>> wrote:

hello,

I am now currently using this ugly hack to get a reasonable (let''s say
user friendly) exception backtrace from an error in executed code:

        public object Execute(string code, ScriptScope scope)

        {

            code = @"begin

_=(

"+code+@"

)

rescue Exception

self.__message__=$!.message.to_clr_string

self.__backtrace__ = $!.backtrace

throw

end";

            object result = null;

            try

            {

                LogManager.GetLogger("Ruby").Debug("\r\n" +
code);

                result = m_engine.Execute(code, scope);



            }

            catch (Exception e)

            {

                var backtrace =
scope.GetVariable<RubyArray>("__backtrace__");

                string msg =
scope.GetVariable<string>("__message__") +"\r\n" +
string.Join("\r\n", backtrace.Select(s => s.ToString()).ToArray());



                LogManager.GetLogger("Ruby").Error(msg);

            }

            return result;

        }



Even though it seems to work well I am absolutely not satisfied with it. Is
there a better way to do this?
-- henon



_______________________________________________
Ironruby-core mailing list
Ironruby-core at rubyforge.org<mailto:Ironruby-core at rubyforge.org>
http://rubyforge.org/mailman/listinfo/ironruby-core

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Ironruby core - Feb 2009 - hosting: howto get the nice ruby backtrace on exception thrown from ruby?

[Ironruby-core] hosting: howto get the nice ruby backtrace on exception thrown from ruby?

[Ironruby-core] hosting: howto get the nice ruby backtrace on exception thrown from ruby?

[Ironruby-core] hosting: howto get the nice ruby backtrace on exception thrown from ruby?

[Ironruby-core] hosting: howto get the nice ruby backtrace on exception thrown from ruby?

[Ironruby-core] hosting: howto get the nice ruby backtrace on exception thrown from ruby?