Oh! Yes, it seems so. Thanks for the link! On Tuesday, August 18, 2020 at 3:09:25 PM UTC+1 [email protected] wrote:
> 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/9646e9d9-9217-474a-91d1-9f4d697bc61dn%40googlegroups.com.
