Known Emscripten issue to report upstream

[tiran]

A ticket to collect issues and bugs with Emscripten. We want to report them upstream eventually.

• [x] Emscripten defines IPPROTO_SCTP, but socket(AF_INET, SOCK_STREAM, IPPROTO_SCTP) causes an abort, https://github.com/emscripten-core/emscripten/pull/16479
• [x] clock_nanosleep(CLOCK_MONOTONIC, TIMER_ABSTIME, &timeout_abs, NULL) does not work as expected, causes time.sleep to hang forever. nanosleep(&timeout_ts, NULL) works. https://github.com/emscripten-core/emscripten/issues/16453
• [X] freeaddrinfo crash https://github.com/emscripten-core/emscripten/issues/16081
• [X] strftime mishandles quoted percent, https://github.com/emscripten-core/emscripten/issues/16155
• [x] week number of strftime("%U") and %W wrong https://github.com/emscripten-core/emscripten/issues/16156
• [ ] mkfifo() and mknod() create regular file https://github.com/emscripten-core/emscripten/issues/16158
• [x] opendir / open(O_DIRECTORY) leaks file directory https://github.com/emscripten-core/emscripten/issues/16452
• [X] msync() on anonymous mapping fails, https://github.com/emscripten-core/emscripten/issues/16350
• [ ] fstat does not work on pipes, https://github.com/emscripten-core/emscripten/issues/16414 and https://github.com/python/cpython/pull/31770
• [ ] fstat does not work on unlinked file
• [x] Blocking socket accept() fails with TypeError: Cannot read property 'stream' of undefined, https://github.com/emscripten-core/emscripten/issues/16047
• [x] utimensat sets wrong atime and mtime, https://github.com/emscripten-core/emscripten/issues/16458
• [ ] umask is stubbed
• [ ] select does not support non-NULL exceptfds, crashes with assertion error. CPython workaround https://github.com/python/cpython/pull/31865
• [X] strftime %V issue, https://github.com/emscripten-core/emscripten/pull/16494

[emmatyping]

I'm actually surprised a nanosecond timer works at all considering the spectre mitigations

[tiran]

• freeaddrinfo crash https://github.com/emscripten-core/emscripten/issues/16081

[tiran]

• strftime mishandles quoted percent, https://github.com/emscripten-core/emscripten/issues/16155

[brettcannon]

Did the two initial issues get reported upstream? Based on how they already fixed the last two issues Christian reported it seems the Emscripten folks are quick to fix things.

[tiran]

Did the two initial issues get reported upstream? Based on how they already fixed the last two issues Christian reported it seems the Emscripten folks are quick to fix things.

No, I haven't had time to create simple reproducers in C for the two initial bugs.