Support exceptionOptions in setExceptionBreakpoints to catch arbitrary exception classes via DAP

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Evaluación

Dificultad
4/5
Tiempo estimado
3-5 días
Aptitud para principiantes
55/100
Tipo de issue
Nueva funcionalidad
Claridad
Bastante claro
Estado de actividad
Tranquilo
Stack tecnológico
ruby
Área
devtools

Línea de trabajo

Start with lib/debug/server_dap.rb around the supportsExceptionOptions capability and compare the setExceptionBreakpoints handling with the DAP specification. Trace how exception filters are represented, then verify that arbitrary exception classes can be requested through DAP without changing the existing any and RuntimeError behavior.

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Descripción

Your proposal

I'd like to catch exceptions of an arbitrary class via DAP (Debug Adapter Protocol), just like the console UI's catch MyError command.
Currently it is not possible to catch exceptions by specifying an arbitrary class via DAP.
I believe this can be achieved by handling the exceptionOptions argument of the setExceptionBreakpoints request and enabling the corresponding capability.

Reference: setExceptionBreakpoints in the DAP specification
https://microsoft.github.io/debug-adapter-protocol//specification.html

supportsExceptionOptions is listed as "Will be supported" in https://github.com/ruby/debug/blob/6510cfbc7496c55ebbefa437a25c17ca58f7c5eb/lib/debug/server_dap.rb#L169

Additional context

Background:
While developing an MCP server for the debug gem, I ran into the problem that catching an exception of a specific class is not possible via DAP.
rira100000000/debug-mcp

The standard filters are only two: any (all exceptions) and RuntimeError, so currently the only choices are catching every error or catching only RuntimeError.
With any, every Exception is caught — including ones raised internally by frameworks such as Rails — which produces a lot of noise before you reach the exception you actually care about.

Lenguaje dominante
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