If you are using MEMFS then its contents would (by design) be reset when
you reset your memory.

If you want to preserve data between runs you would need some kind of
persistent store.   Perhaps IDBFS?

On Thu, Feb 9, 2023 at 2:34 PM Ilya Kantor <ilia...@gmail.com> wrote:

> That's a great hint, thank you!
>
> I tried to do so, but bumped into a problem: I need to pass FS from the
> old module to the new one.
> I'm using the most basic default MEMFS.
>
> Any idea how to do it?
>
> Or maybe I should recursively walk and copy files? That's not the most
> elegant solution, but should work.
>
> Kind regards,
> Ilya Kantor
>
> On 9 Feb 2023, at 20:30, 'Sam Clegg' via emscripten-discuss <
> emscripten-discuss@googlegroups.com> wrote:
>
> Hi Ilya,
>
> Emscripten doesn't have any way to do that today (at least not that I know
> of).
>
> Your best bet is probably to use `-sMODULARIZE` and then construct a new
> instance for each time you want to call `main`.   i.e `new MyModule()` each
> time.
>
> cheers,
> sam
>
> On Thu, Feb 9, 2023 at 11:18 AM Ilya Kantor <ilia...@gmail.com> wrote:
>
>> Hello,
>>
>> I use Emscripten to compile a CLI application, and then run its _main
>> many times.
>>
>> The problem is that it expects every call to be "from the scratch", with
>> uninitialized data structures.
>>
>> Right now, e.g. a file has `struct my_type s`, and initializes it on the
>> first run, then it survives till the second run and spoils it.
>>
>> How to re-init WASM, to clear memory for new  runs (start afresh) while
>> keeping FS untouched?
>>
>>
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