Hi Jakob,

I changed my code a little bit to open a Debugger. Yet I still have two issues.

On 6/21/20 5:53 PM, Robert Withers wrote:

You can load the following and run the tests.

Installer ss project: 'Cryptography'; install: 'PromisesLocal'.

The latest PromisesLocal-rww.2.mcz  has the changes. You can load with the above Installer doIt.

I got a little lost in capturing exceptions, within the Vat's event loop #processSends. I have tickled my implementation a little to try and get the Vat event thread to throw an exception, which presents a Debugger. I have been unable to pop up the Debugger on the error, but the promise does get smashed.

I removed catch-all error handling from the PriorityVat>>#processSends. I then added to the error handling in EventualMessageSend>>#value to open a debugger after smashing the resolver.


    | value |
    [value := receiver
        perform: selector
        withArguments: (self collectArguments: arguments)
        inSuperclass: receiver class.
    self resolver notNil
        ifTrue: [ self resolver resolve: value ] ]
            on: Exception
            do: [:ex |
                self resolver notNil
                    ifTrue: [self resolver smash: ex].
                Processor activeProcess signalException: ex].

I have a couple of issues with this:

  1. When I close the debugger, the EventualProcess with the stack that ended up in this exception is terminated. I would need this process to restart and continue, after clearing the stack from this exception. I am unsure how to make that happen. Any suggestions are MOST WELCOME!
  2. The stack in the Debugger is not opened on the stack frame that causes the failure. I would like to rewind the stack to the bolded line, where the exception is produced, in this case it would be the method: ZeroDivide(Exception)>>signal. Is this not where the Debugger should be opened? Again, I am unsure how to do this and all suggestions are MOST WELCOME!

--- The full stack ---
[] in EventualMessageSend>>value
[] in Context>>handleSignal:
[] in EventualMessageSend>>value
[] in EventualProcess>>setupContext