WASM: lib WASI update

[hamidrezakks]

Hi, Thanks for the great project, github.com/WebAssembly/wasi-libc has been updated recently, can you please update tinygo wasm to the latest wasi-lib?

Bests, KK

[aykevl]

Is there anything that we need from the new libc version? Better features or bug fixes relevant to TinyGo?

I'm not necessarily against updating the library, but I think it needs a bit more justification than that it is the newest version.

[hamidrezakks]

They have updated the MUSL

MUSL release note: 1.2.2 release notes

major changes:

• child restrictions lifted after fork of multithreaded parent

new features:

• _Fork function (POSIX-future)
• reallocarray function (extension from OpenBSD, now widespread)
• gettid function (kernel tid as supported concept)
• SIGEV_THREAD_ID sigevent API (Linux extension)
• tcgetwinsize and tcsetwinsize functions (POSIX-future)

performance:

• faster software sqrt on archs without native sqrt instruction

compatibility:

• realpath no longer depends on procfs availability & accuracy
• time zone parser now always prefers 64-bit tables if present
• crypt_blowfish now supports $2b$ prefix
• res_query now reports errors via h_errno
• set*id and setrlimit are now safe in vforked/cloned child
• setgroups now applies to all threads
• dlopen debugger notification is improved, should work with lldb
• setrlimit no longer needs __synccall broadcast on linux 2.6.36+
• faccessat with AT_EACCESS no longer needs child process on linux 5.8+

bugs fixed:

• buffer overflow and infinite loop errors in wcsnrtombs (CVE-2020-28928)
• sem_close unmapped still-referenced semaphores
• fork of process with active aio could deadlock or crash paren
• pthread_cond_wait was broken with priority-inheritance mutex
• getgrouplist wrongly failed when nscd reported an empty list
• abort could leak modified SIGABRT disposition to fork or posix_spawn child
• regression with mallocng: malloc_usable_size(0) crashed
• readlink wrongly gave EINVAL on zero length dest buffer
• sqrtl was severely inaccurate (not correctly rounded) on ldquad archs
• assert failure wrongly flushed stdio (possible deadlock)
• MUSL_LOCPATH search was broken with multiple components
• missing newline in herror output
• possible deadlock in pthread_exit with pshared mutex or barrier usage
• pthread_mutexattr_getprotocol didn't read back protocol
• v4l2 ioctl translation for pre-time64 kernels didn't work

arch-specific bugs fixed:

• x86_64 longjmp failed to handle 0 argument reliably
• i386 __set_thread_area fallback for pre-2.6 kernels didn't work
• missing O_LARGEFILE macro value on x86_64, x32, mips64
• unpredictable s390x breakage from failure to preserve call-saved registers

[dgryski]

wasi-libc has been updated as part of https://github.com/tinygo-org/tinygo/pull/2224; closing this.