Auto Play + endless loops = bad

[grable0]

Auto Play has locked me out of a small project because of an endless loop in a Verilog file leaving the tab locked. I can force enter other platforms by modifying the url fine, but whenever i enter that platform again the project runs and the tab locks up, making it inaccessible.

[grable0]

It happened again :( Im not sure if its directly Auto Play, since im sure i pressed pause before editing yet another Verilog for loop. Ah well, now im locked out of both Verilog platforms... It was fun while it lasted lol.

[sehugg]

You can hack the URL in the address bar to choose any other file, or a brand new file, and get back into Verilog.

BTW what's the Verilog code that caused the lock-up?

[grable0]

Thanks, that worked :) At least i can continue using it now, although the project i changed and any files part of it still causes it to lock up.

Both times i was in the process of changing a for loop.

First one, from going forwards to backwards, i changed the INIT, then TEST, then it locked up. from for( integer i = 0; i < 32; i = i + 1) to for( integer i = 32 - 1; i >= 0; i = i + 1)

Second one i was again messing with a for loop, but this time i renamed the loop variable and accidentally ended up with this: for( integer i = 0; i < 32; i = i + 1) i = ~i; Another endless loop.

edit: Both times was inside an initial block btw.

Annoying for sure.. but thats what you get with instant feedback lol

Maybe add some top-level tick counter that the frontend can check now and then to see if its running correctly. Thats what i did when this prompted me to roll my own crappy desktop version of a vga verilator display haha.

[sehugg]

Verilator compiles directly to JS, so there's not a good way to detect when the code has stalled. Moving the simulation to a Worker would be one option -- big architecture change though. Another is to (somehow?) detect the JS hanging on a previous run and set a flag that disables auto-start. Or just always disable auto-start, but that's no fun :)

Probably be good to have an "autostart=0" flag just so you can delete/edit the existing file, in any case.