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
>>>>
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>>>>
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