I've seen on OS X and iOS that sometimes at startup if the browser is not able to allocate the Emscripten heap, it is possible that it just crashes the whole browser, instead of being able to gracefully throw a JS exception. This is quite annoying, but unfortunately don't have a solution, except to try to minimise memory usage and the heap size to a smaller one. If it crashes in some other location after startup, then it could be some other type of bug.
2017-01-10 23:22 GMT+02:00 Brion Vibber <br...@pobox.com>: > I get some intermittent crashes in iOS Safari with my projects, but a lot > less than I used to (it's improved lately). I find a crash in Safari > usually means one of two things: > > 1) You allocated too much memory and the process died > or > 2) Bug in Apple's JIT compiler > > If you allocate a large amount of memory for the asm.js code, it's a real > possibility to simply run out of RAM -- especially on older 32-bit devices. > You're already using memory for the code itself, its parse tree, and its > compilation, plus the heap allocated for the emscripten code, so usage > might be higher than you think. > > (Sadly you can't debug the Safari process with Apple's developer tools, > but you should be able to check the process's memory usage with a suitable > system view in Instruments.) > > If memory usage is low, try to find a reproducible test case and report it > to Apple. This may be tricky if you have a lot of code going on, > unfortunately. :( > > Even if it's not a small case, if it's consistent that'll help a *lot* in > hopefully getting a response from Apple. I recommend you also copy-paste > the report to Open Radar - https://openradar.appspot.com/faq - since > Apple's bug database is not public, and this can help other developers > searching for similar problems. > > -- brion > > On Fri, Jan 6, 2017 at 7:24 AM, Brian Gavin <bgavi...@gmail.com> wrote: > >> Hello, >> I have an ASMJS app that runs well on everything but on the IPad. When >> I run it on the IPad sometimes we get random crashes with it. Has anyone >> else had this problem and been able to fix it? I tried playing with some >> optimization flag and other linker setting but they did not seem to help. >> I seems like Safari on the IPad either does not like ASMJS or large >> javscript files. >> >> Thanks >> Brian Gavin >> >> -- >> You received this message because you are subscribed to the Google Groups >> "emscripten-discuss" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to emscripten-discuss+unsubscr...@googlegroups.com. >> For more options, visit https://groups.google.com/d/optout. >> > > -- > You received this message because you are subscribed to the Google Groups > "emscripten-discuss" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to emscripten-discuss+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "emscripten-discuss" group. To unsubscribe from this group and stop receiving emails from it, send an email to emscripten-discuss+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
