It could be a bug in chrome. I would try to narrow it down and file a testcase for them.
On Thu, Oct 29, 2015 at 3:58 PM, Pau Ballart <[email protected]> wrote: > The chrome debugger says: > [image: Imatge inserida 1] > And the Firefox: > [image: Imatge inserida 2] > > 2015-10-29 15:49 GMT-07:00 Pau Ballart <[email protected]>: > >> Hello, >> >> I've been working hard with my implementation and I almost got it. >> I'd say it's working fine in Safari but I got a DOM exception in Chrome >> and Firefox and I have no idea why. the DOM Exception doesn't give any >> message nor error code... >> The error happens when inside my C code i have an EM_ASM_ARGS() block and >> inside this I use the Javascript WebCrypto API to decrypt the image. The >> think is the same decrypt method works when I use it outside emscripten in >> a normal webpage and inside emscripten it works with Safari! But why it >> doesn't work in Chrome? >> >> Thanks >> >> 2015-10-20 21:24 GMT-07:00 Alon Zakai <[email protected]>: >> >>> Yes, malloc the space, and memcpy the contents to that space. >>> >>> On Tue, Oct 20, 2015 at 8:20 PM, Pau Ballart <[email protected]> wrote: >>> >>>> I did some tries with no success. >>>> If I have this declaration: >>>> *int p3stuff(char *imgUrl, unsigned char *wrappedkey);* >>>> How can I make sure the contents of imgUrl will persist even out of the >>>> scope? >>>> Because it's a pointer so maybe I need to malloc first the space and >>>> then memcpy the contents? >>>> Suppose I have a global var like this *char *imageUrl;* I'd be very >>>> thankful if you can provide me an example. >>>> >>>> 2015-10-20 15:57 GMT-07:00 Alon Zakai <[email protected]>: >>>> >>>>> Yes, if you want something to live beyond the current function call, >>>>> you should use malloc(). That will only be reused after you call free() on >>>>> it. >>>>> >>>>> On Tue, Oct 20, 2015 at 3:51 PM, Pau Ballart <[email protected]> >>>>> wrote: >>>>> >>>>>> Updated to 1.35 but same problem... >>>>>> Maybe the question to formulate would be: How can I save in a >>>>>> global/static variable some information so that I can acces it later in >>>>>> the >>>>>> callback function and make sure it's not overwritten? >>>>>> What do you think about using malloc() somehow? Would it work? >>>>>> >>>>>> 2015-10-20 14:18 GMT-07:00 Alon Zakai <[email protected]>: >>>>>> >>>>>>> Might be worth trying current master (or incoming) then, which is >>>>>>> now 1.35.0. >>>>>>> >>>>>>> On Tue, Oct 20, 2015 at 2:16 PM, Pau Ballart <[email protected]> >>>>>>> wrote: >>>>>>> >>>>>>>> $ emcc -v >>>>>>>> emcc (Emscripten gcc/clang-like replacement + linker emulating GNU >>>>>>>> ld) 1.34.8 >>>>>>>> clang version 3.7.0 >>>>>>>> Target: x86_64-apple-darwin15.0.0 >>>>>>>> Thread model: posix >>>>>>>> INFO root: (Emscripten: Running sanity checks) >>>>>>>> >>>>>>>> 2015-10-20 14:05 GMT-07:00 Alon Zakai <[email protected]>: >>>>>>>> >>>>>>>>> One possible issue is that if those values are on the stack, and >>>>>>>>> the scope exits, then that stack memory might be reused. For example >>>>>>>>> this >>>>>>>>> is unsafe: >>>>>>>>> >>>>>>>>> { >>>>>>>>> char buffer[100]; >>>>>>>>> // write into buffer >>>>>>>>> emscripten_async_wget(..., (void*)buffer); >>>>>>>>> } >>>>>>>>> >>>>>>>>> The buffer will be released before the async callback occurs, and >>>>>>>>> other data might be written into it before the callback reads from it. >>>>>>>>> >>>>>>>>> Which version of emscripten are you using, btw? I remember a while >>>>>>>>> back we had a bug around this. >>>>>>>>> >>>>>>>>> On Tue, Oct 20, 2015 at 1:36 PM, Pau Ballart <[email protected]> >>>>>>>>> wrote: >>>>>>>>> >>>>>>>>>> Hello, >>>>>>>>>> >>>>>>>>>> After some research and some refactor I did the following: >>>>>>>>>> >>>>>>>>>> - In my p3stuff function I >>>>>>>>>> call emscripten_set_main_loop(wait_wgets, 0, 0); so the >>>>>>>>>> application is not >>>>>>>>>> terminated. >>>>>>>>>> - In wait_wgets I call the emscripten_async_wget(imageUrl, >>>>>>>>>> path, onLoaded, onError); only the first time the method is >>>>>>>>>> called. >>>>>>>>>> - In the onLoaded callback I >>>>>>>>>> call emscripten_cancel_main_loop(); and then I call my c code >>>>>>>>>> that perform >>>>>>>>>> the jpeg stuff. >>>>>>>>>> >>>>>>>>>> Problem is: >>>>>>>>>> the p3stuff function has 2 arguments: int p3stuff(char *imgUrl, >>>>>>>>>> unsigned char *wrappedkey) >>>>>>>>>> When it's called i have two global variables unsigned char >>>>>>>>>> *wrappedKey; and char *imageUrl; which are assigned with the >>>>>>>>>> argument like >>>>>>>>>> that: >>>>>>>>>> >>>>>>>>>> wrappedKey = wrappedkey; >>>>>>>>>> imageUrl = imgUrl; >>>>>>>>>> >>>>>>>>>> I do that in order to access the image url from the wait_wgets() >>>>>>>>>> or the wrapped key from the onLoaded callback but I think there is >>>>>>>>>> some >>>>>>>>>> memory management problems cause if I print the url just before >>>>>>>>>> calling >>>>>>>>>> emscripten_async_wget the imageUrl variable content is completely >>>>>>>>>> rubbish >>>>>>>>>> but id I don't print anything it works. >>>>>>>>>> >>>>>>>>>> So how can I use the global variables in C in order to not get >>>>>>>>>> overwritten? Maybe using malloc, or memcopy? >>>>>>>>>> >>>>>>>>>> Thanks, >>>>>>>>>> >>>>>>>>>> Pau >>>>>>>>>> >>>>>>>>>> 2015-10-19 10:53 GMT-07:00 Pau Ballart <[email protected]>: >>>>>>>>>> >>>>>>>>>>> Okay I will try the async version and let you know. >>>>>>>>>>> >>>>>>>>>>> Thanks >>>>>>>>>>> >>>>>>>>>>> 2015-10-17 19:37 GMT-07:00 Alon Zakai <[email protected]>: >>>>>>>>>>> >>>>>>>>>>>> The only tricky thing with emscripten_wget is that as mentioned >>>>>>>>>>>> in the docs, >>>>>>>>>>>> >>>>>>>>>>>> >>>>>>>>>>>> http://kripken.github.io/emscripten-site/docs/api_reference/emscripten.h.html#c.emscripten_wget >>>>>>>>>>>> >>>>>>>>>>>> it requires the ASYNCIFY option. It's easier in general to use >>>>>>>>>>>> the async version, emscripten_async_wget, which does not require >>>>>>>>>>>> ASYNCIFY. >>>>>>>>>>>> >>>>>>>>>>>> >>>>>>>>>>>> On Sat, Oct 17, 2015 at 10:47 AM, Pau Ballart < >>>>>>>>>>>> [email protected]> wrote: >>>>>>>>>>>> >>>>>>>>>>>>> I think the php code is correct so I'm just trying to download >>>>>>>>>>>>> an image and process it's data but I think I'm missing something >>>>>>>>>>>>> about the >>>>>>>>>>>>> lifecycle or wget function because I get unexpected exit errors. >>>>>>>>>>>>> >>>>>>>>>>>>> So I'd like to know if the emscripten_wget(imgUrl, path); is >>>>>>>>>>>>> correct because I have the weirdest behaviour ever that depending >>>>>>>>>>>>> on the >>>>>>>>>>>>> p3stuff function param "wrappedkey" the download succeeds or >>>>>>>>>>>>> not. >>>>>>>>>>>>> >>>>>>>>>>>>> 2015-10-15 17:07 GMT-07:00 Alon Zakai <[email protected]>: >>>>>>>>>>>>> >>>>>>>>>>>>>> I see you have >>>>>>>>>>>>>> >>>>>>>>>>>>>> P3Func = Module.cwrap('p3stuff', 'number', ['string', >>>>>>>>>>>>>> 'string']); >>>>>>>>>>>>>> >>>>>>>>>>>>>> which looks good. You can then call it with something like >>>>>>>>>>>>>> >>>>>>>>>>>>>> result = P3Func('first', 'second'); >>>>>>>>>>>>>> >>>>>>>>>>>>>> which I see you are doing. What part of that are you trying >>>>>>>>>>>>>> to improve? >>>>>>>>>>>>>> >>>>>>>>>>>>>> >>>>>>>>>>>>>> On Thu, Oct 15, 2015 at 12:59 PM, Pau Ballart < >>>>>>>>>>>>>> [email protected]> wrote: >>>>>>>>>>>>>> >>>>>>>>>>>>>>> Okay so the php is just calling a function I declared. >>>>>>>>>>>>>>> Because I need to pass the image url as an argument and a key, >>>>>>>>>>>>>>> I don't know >>>>>>>>>>>>>>> how to do it using the main function so I changed the main >>>>>>>>>>>>>>> function for >>>>>>>>>>>>>>> this one with the two arguments and then called this function >>>>>>>>>>>>>>> from my php >>>>>>>>>>>>>>> code. >>>>>>>>>>>>>>> Is there a better way to call emscripten passing parameters? >>>>>>>>>>>>>>> >>>>>>>>>>>>>>> Thanks. >>>>>>>>>>>>>>> >>>>>>>>>>>>>>> 2015-10-15 12:55 GMT-07:00 Alon Zakai <[email protected]>: >>>>>>>>>>>>>>> >>>>>>>>>>>>>>>> It would be good to focus the question more, it's hard to >>>>>>>>>>>>>>>> tell what the core issue is. Try to reduce the problem to just >>>>>>>>>>>>>>>> one concrete >>>>>>>>>>>>>>>> thing, like just loading a file, and doing it without that >>>>>>>>>>>>>>>> custom PHP >>>>>>>>>>>>>>>> script, for example. >>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>> On Thu, Oct 15, 2015 at 12:27 PM, Pau Ballart < >>>>>>>>>>>>>>>> [email protected]> wrote: >>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>> Hello developers, >>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>> I'm starting a project and I'm new at Javascript and >>>>>>>>>>>>>>>>> emscripten. I'm trying to download some image data from a >>>>>>>>>>>>>>>>> server and then >>>>>>>>>>>>>>>>> process it using some c functions I already have working. I >>>>>>>>>>>>>>>>> asked this >>>>>>>>>>>>>>>>> question in Stackoverflow so I share you the link and maybe >>>>>>>>>>>>>>>>> one of you can >>>>>>>>>>>>>>>>> help me. >>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>> http://stackoverflow.com/questions/33087205/emscripten-code-for-image-data-download-using-emscripten-wget-or-emscripten-asyn >>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>> Thank you, >>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>> Pau B >>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>> -- >>>>>>>>>>>>>>>>> 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]. >>>>>>>>>>>>>>>>> For more options, visit https://groups.google.com/d/optout >>>>>>>>>>>>>>>>> . >>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>> -- >>>>>>>>>>>>>>>> You received this message because you are subscribed to a >>>>>>>>>>>>>>>> topic in the Google Groups "emscripten-discuss" group. >>>>>>>>>>>>>>>> To unsubscribe from this topic, visit >>>>>>>>>>>>>>>> https://groups.google.com/d/topic/emscripten-discuss/BEb-1mjDvZI/unsubscribe >>>>>>>>>>>>>>>> . >>>>>>>>>>>>>>>> To unsubscribe from this group and all its topics, send an >>>>>>>>>>>>>>>> email to [email protected]. >>>>>>>>>>>>>>>> For more options, visit https://groups.google.com/d/optout. >>>>>>>>>>>>>>>> >>>>>>>>>>>>>>> >>>>>>>>>>>>>>> >>>>>>>>>>>>>>> >>>>>>>>>>>>>>> -- >>>>>>>>>>>>>>> Pau Ballart >>>>>>>>>>>>>>> >>>>>>>>>>>>>>> -- >>>>>>>>>>>>>>> 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]. >>>>>>>>>>>>>>> For more options, visit https://groups.google.com/d/optout. >>>>>>>>>>>>>>> >>>>>>>>>>>>>> >>>>>>>>>>>>>> -- >>>>>>>>>>>>>> You received this message because you are subscribed to a >>>>>>>>>>>>>> topic in the Google Groups "emscripten-discuss" group. >>>>>>>>>>>>>> To unsubscribe from this topic, visit >>>>>>>>>>>>>> https://groups.google.com/d/topic/emscripten-discuss/BEb-1mjDvZI/unsubscribe >>>>>>>>>>>>>> . >>>>>>>>>>>>>> To unsubscribe from this group and all its topics, send an >>>>>>>>>>>>>> email to [email protected]. >>>>>>>>>>>>>> For more options, visit https://groups.google.com/d/optout. >>>>>>>>>>>>>> >>>>>>>>>>>>> >>>>>>>>>>>>> >>>>>>>>>>>>> >>>>>>>>>>>>> -- >>>>>>>>>>>>> Pau Ballart >>>>>>>>>>>>> >>>>>>>>>>>>> -- >>>>>>>>>>>>> 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]. >>>>>>>>>>>>> For more options, visit https://groups.google.com/d/optout. >>>>>>>>>>>>> >>>>>>>>>>>> >>>>>>>>>>>> -- >>>>>>>>>>>> You received this message because you are subscribed to a topic >>>>>>>>>>>> in the Google Groups "emscripten-discuss" group. >>>>>>>>>>>> To unsubscribe from this topic, visit >>>>>>>>>>>> https://groups.google.com/d/topic/emscripten-discuss/BEb-1mjDvZI/unsubscribe >>>>>>>>>>>> . >>>>>>>>>>>> To unsubscribe from this group and all its topics, send an >>>>>>>>>>>> email to [email protected]. >>>>>>>>>>>> For more options, visit https://groups.google.com/d/optout. >>>>>>>>>>>> >>>>>>>>>>> >>>>>>>>>>> >>>>>>>>>>> >>>>>>>>>>> -- >>>>>>>>>>> Pau Ballart >>>>>>>>>>> >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> -- >>>>>>>>>> Pau Ballart >>>>>>>>>> >>>>>>>>>> -- >>>>>>>>>> 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]. >>>>>>>>>> For more options, visit https://groups.google.com/d/optout. >>>>>>>>>> >>>>>>>>> >>>>>>>>> -- >>>>>>>>> You received this message because you are subscribed to a topic in >>>>>>>>> the Google Groups "emscripten-discuss" group. >>>>>>>>> To unsubscribe from this topic, visit >>>>>>>>> https://groups.google.com/d/topic/emscripten-discuss/BEb-1mjDvZI/unsubscribe >>>>>>>>> . >>>>>>>>> To unsubscribe from this group and all its topics, send an email >>>>>>>>> to [email protected]. >>>>>>>>> For more options, visit https://groups.google.com/d/optout. >>>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> -- >>>>>>>> Pau Ballart >>>>>>>> >>>>>>>> -- >>>>>>>> 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]. >>>>>>>> For more options, visit https://groups.google.com/d/optout. >>>>>>>> >>>>>>> >>>>>>> -- >>>>>>> You received this message because you are subscribed to a topic in >>>>>>> the Google Groups "emscripten-discuss" group. >>>>>>> To unsubscribe from this topic, visit >>>>>>> https://groups.google.com/d/topic/emscripten-discuss/BEb-1mjDvZI/unsubscribe >>>>>>> . >>>>>>> To unsubscribe from this group and all its topics, send an email to >>>>>>> [email protected]. >>>>>>> For more options, visit https://groups.google.com/d/optout. >>>>>>> >>>>>> >>>>>> >>>>>> >>>>>> -- >>>>>> Pau Ballart >>>>>> >>>>>> -- >>>>>> 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]. >>>>>> For more options, visit https://groups.google.com/d/optout. >>>>>> >>>>> >>>>> -- >>>>> You received this message because you are subscribed to a topic in the >>>>> Google Groups "emscripten-discuss" group. >>>>> To unsubscribe from this topic, visit >>>>> https://groups.google.com/d/topic/emscripten-discuss/BEb-1mjDvZI/unsubscribe >>>>> . >>>>> To unsubscribe from this group and all its topics, send an email to >>>>> [email protected]. >>>>> For more options, visit https://groups.google.com/d/optout. >>>>> >>>> >>>> >>>> >>>> -- >>>> Pau Ballart >>>> >>>> -- >>>> 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]. >>>> For more options, visit https://groups.google.com/d/optout. >>>> >>> >>> -- >>> You received this message because you are subscribed to a topic in the >>> Google Groups "emscripten-discuss" group. >>> To unsubscribe from this topic, visit >>> https://groups.google.com/d/topic/emscripten-discuss/BEb-1mjDvZI/unsubscribe >>> . >>> To unsubscribe from this group and all its topics, send an email to >>> [email protected]. >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> >> >> -- >> Pau Ballart >> > > > > -- > Pau Ballart > > -- > 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]. > 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 [email protected]. For more options, visit https://groups.google.com/d/optout.
