Debugging spawned child processes

[Nathan Hoyt]

I recently discovered Theseus, and it has intrigued me right away. I was trying to debug some nodejs code that spawns child processes, when I encountered the error message:

[node-theseus] notice: node-theseus cannot instrument spawned processes yet

I tried reviewing the source of node-theseus and fondue, but it was not immediately apparent why. Is this something that would be extremely difficult to do, or has it simply not been implemented yet? I plan to take a stab at adding this functionality, but it would be nice to hear your thoughts on the issue.

Thanks, Nathan

[Tom Lieber]

Good question! Two main reasons:

1) There are a few ways to create child processes and I’m not familiar enough with them to handle them well. I couldn’t say which methods to focus on, or say how to discretely infect the child process with fondue. I’d just be guessing if I did it myself. If you have a pet project you want to get working, then you’re in a better position to do it than me, but I can help. :)

2) When I started Theseus, there wasn’t any way to start a WebSocket server in Brackets, so node-theseus starts the server and Brackets tries to connect to it periodically. This would have to be reversed if there were multiple node-theseus processes.

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Tom Lieber
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