Hi, I think there is an issue for this : https://github.com/emscripten-core/emscripten/issues/11914
On Mon, Aug 17, 2020 at 3:42 PM 'Sam Clegg' via emscripten-discuss < [email protected]> wrote: > > > On Mon, Aug 17, 2020 at 3:28 AM Segmentation Fault Error < > [email protected]> wrote: > >> Should this issue be raised in the emsdk repo? or left aside, until we >> have a final release of the threads feature? >> >> > Thread support in emscripten is officially released and available. If > you find bugs then opening a bug in the emscripten repo (not the emsdk > repo) is probably the right way to go. > > cheers, > sam > > >> On Wednesday, July 29, 2020 at 12:26:14 PM UTC+1 Segmentation Fault Error >> wrote: >> >>> Toying with this concept I realized that some operations cannot be >>> performed if you launch a thread from a Web Worker. >>> >>> A simpler example, following my setup linked in the OP: >>> >>> #include <pthread.h> >>> #include <stdio.h> >>> #include <emscripten.h> >>> >>> void *thread(void *arg) >>> { >>> printf("Hello from thread!\n"); // Execution hangs here if Module is >>> instantiated in a Web Worker >>> return NULL; >>> } >>> >>> EMSCRIPTEN_KEEPALIVE void doSomething() >>> { >>> pthread_t thr; >>> pthread_create(&thr, NULL, thread, NULL); >>> } >>> >>> To me it seems like it gets locked on spawning threads, IO, ... I guess >>> this is not expected behavior, and that this can happen because WASM >>> threads is a WIP feature. Is there anything else I could do here? >>> >>> Cheers, >>> SFE >>> >>> On Friday, July 24, 2020 at 5:35:43 PM UTC+1 [email protected] wrote: >>> >>>> Interesting, so this can use pthreads from the main thread ok, but not >>>> when starting from a pthread? >>>> >>>> That is a less-tested use case, so it's possible you've run into a bug. >>>> Building with -s PTHREADS_DEBUG may help with extra logging. But it may be >>>> best to try to reduce this to a small testcase, as it may need to be >>>> debugged in depth. >>>> >>>> On Thu, Jul 23, 2020 at 7:46 AM Segmentation Fault Error < >>>> [email protected]> wrote: >>>> >>>>> Hello everyone, >>>>> >>>>> >>>>> >>>>> I have been using for a while emscripten to compile a large library. >>>>> Since its operations take long time, I moved the module to a web worker, >>>>> where I can call functions without blocking the UI. And it has worked >>>>> fantastic so far! >>>>> >>>>> >>>>> >>>>> To further improve performance, I then enabled pthreads in the >>>>> toolchain. I noticed then that the execution got stuck. Somehow this issue >>>>> does not occur if the module is executed on the main UI thread, instead of >>>>> the web worker. >>>>> >>>>> >>>>> >>>>> I have left a link below, to the demo code on how to reproduce the >>>>> issue: a function that launches a thread, that launches several threads. >>>>> It >>>>> happens that this second level never gets executed if the function was >>>>> called from a web worker. >>>>> >>>>> >>>>> >>>>> Maybe I am missing something here, any idea? >>>>> >>>>> >>>>> >>>>> Regards, >>>>> >>>>> SFE >>>>> >>>>> Link: >>>>> https://drive.google.com/file/d/1EtkdRBN1Y8QpsRE19BH5AePAD3VLAV6U/view?usp=sharing >>>>> >>>>> -- >>>>> 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 [email protected]. >>>>> To view this discussion on the web visit >>>>> https://groups.google.com/d/msgid/emscripten-discuss/141a16e4-647e-484c-b36a-8db45addaec8o%40googlegroups.com >>>>> <https://groups.google.com/d/msgid/emscripten-discuss/141a16e4-647e-484c-b36a-8db45addaec8o%40googlegroups.com?utm_medium=email&utm_source=footer> >>>>> . >>>>> >>>> -- >> 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 [email protected]. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/emscripten-discuss/df1255b4-7a74-4b00-9ea7-300ec039c5b6n%40googlegroups.com >> <https://groups.google.com/d/msgid/emscripten-discuss/df1255b4-7a74-4b00-9ea7-300ec039c5b6n%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> > -- > 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 [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/emscripten-discuss/CAL_va2-jXJingg7HZehLFFtBG24dT0uijNUo0J%2BZhbq-YKPf6w%40mail.gmail.com > <https://groups.google.com/d/msgid/emscripten-discuss/CAL_va2-jXJingg7HZehLFFtBG24dT0uijNUo0J%2BZhbq-YKPf6w%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > -- 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 [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/emscripten-discuss/CANLCaykTiFLinWjVRd4vNZYJ9_mQERZOG9CeRTtcqrWN%3DBfEBA%40mail.gmail.com.
