Multi-threaded application: Application (main loop) freezes after about 1 min of interactions

[sophonet]

Hi,

in an attempt to turn my single-threaded web application running in a browser into a multi-threaded one, I am stuck because of an issue which is hard to debug: When interacting with the canvas, events are passed to a rendering thread using a queue. This all works fine up to a situation in which the main event loop freezes (about a minute of clicking/dragging). I have added a couple of debug print statements and have noticed that this happens at different locations in the code, not at always the same one, and not at a particular one.

Interacting with web assembly via direct function calls (and not via interactions/main event loop) crashes as well, probably due to corrupt memory. The problem even occurs when limiting the number of threads to e.g. 4.

There are no messages printed, and turning on PTHREADS_DEBUG also does not reveal something interesting. Overall Memory usage was about 120 MB, which should be doable in a browser.

Any advice how to continue debugging?

Thanks and best regards,

Sophonet