On Wed, Oct 12, 2022 at 2:22 AM Floh <[email protected]> wrote: > PS: what would be *really* nice is a way to query the current and 'high > water mark' stack sizes (only in debug mode, or with a specific build > option), to get an idea how much stack a program/thread is using, instead > of depending on trial-and-error. >
The current value is accessible via ` emscripten_stack_get_current` defined in `emscripten/stack.h`: https://github.com/emscripten-core/emscripten/blob/main/system/include/emscripten/stack.h Tracking the high water mark could be done with same binaryen pass that currently implement STACK_OVERFLOW_CHECK.. but it's not something we do at this point. > On Tuesday, 11 October 2022 at 17:27:07 UTC+2 [email protected] wrote: > >> On Tue, Oct 11, 2022 at 12:13 AM Floh <[email protected]> wrote: >> >>> My C code is still quite stack heavy, because a lot of my code >>> essentially uses the stack as per-frame arena allocator ;) But I guess as >>> long as there's a compiler/linker option to set the stack size I think it's >>> fine. >>> >>> Will a stack overflow cause a proper runtime error, or will this result >>> 'undefined behaviour'? >>> >> >> The plan is to enable `STACK_OVERFLOW_CHECK=2` in debug (-O0) builds >> (currently we just use `STACK_OVERFLOW_CHECK=1`). This should give >> precise errors at the point of overflow. >> >> >>> On Tuesday, 11 October 2022 at 01:34:07 UTC+2 [email protected] wrote: >>> >>>> Bumping this discussion because I'm taking a look at landing this once >>>> again. >>>> >>>> In answer to the pthread question: Yes I'm planning on changing the >>>> default for both the main thread and pthreads (The plan is to make them the >>>> same by default). >>>> >>>> On Fri, Jul 9, 2021 at 3:24 AM 'Maksim Ivanov' via emscripten-discuss < >>>> [email protected]> wrote: >>>> >>>>> One question: Will this planned change only affect is only for the >>>>> main thread? In case there's no change for background threads (e.g., >>>>> created via pthreads), it'll be useful to mention it somewhere. >>>>> >>>>> On Thursday, May 27, 2021 at 2:01:11 PM UTC+2 jj wrote: >>>>> >>>>>> ke 19. toukok. 2021 klo 11.27 Floh ([email protected]) kirjoitti: >>>>>> > 1 MB is quite certainly ok (but might be a problem for code with >>>>>> lots of recursions?), but I think 64 KByte is asking for trouble ;) >>>>>> >>>>>> Btw, I would recommend you to try how small you can go. I would be >>>>>> surprised if you are running into issues with 64KB today. (recursions >>>>>> won't increase to this limit, unless the recursing functions have >>>>>> locals that have their addresses taken) >>>>>> >>>>> -- >>>>> >>>> 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/d7c00f7e-6bc2-4ae8-ae2d-0353ae4cff80n%40googlegroups.com >>>>> <https://groups.google.com/d/msgid/emscripten-discuss/d7c00f7e-6bc2-4ae8-ae2d-0353ae4cff80n%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/7c70d4dc-d14b-4282-9a82-1c1e08393dd0n%40googlegroups.com >>> <https://groups.google.com/d/msgid/emscripten-discuss/7c70d4dc-d14b-4282-9a82-1c1e08393dd0n%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/218eec81-edce-45b7-b061-a1d57f381d3an%40googlegroups.com > <https://groups.google.com/d/msgid/emscripten-discuss/218eec81-edce-45b7-b061-a1d57f381d3an%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-SucsJ%2B8w%2BkqPBXqQUr%2B%3DBz3B%3DzKnhKw952Y-1Cz8cVQ%40mail.gmail.com.
