time.Sleep does not work

[mathetake]

With the following code:

// override
func (ctx faultInjection) OnHttpRequestHeaders(int, bool) types.Action {
	if time.Now().UnixNano()%100 < 5 {
		time.Sleep(time.Millisecond * 500)
		proxywasm.LogInfo("sleep for 500 milliseconds...")
	}
	return types.ActionContinue
}

we have the following compile error

tinygo build -o ./examples/fault_injection/main.go.wasm -target=wasi -wasm-abi=generic ./examples/fault_injection/main.go
panic: trying to make exported function async: proxy_on_request_headers

goroutine 1 [running]:
github.com/tinygo-org/tinygo/transform.(*coroutineLoweringPass).findAsyncFuncs(0xc003e7b040)
        /home/circleci/project/transform/coroutines.go:186 +0xa64
github.com/tinygo-org/tinygo/transform.(*coroutineLoweringPass).load(0xc003e7b040, 0x20, 0x7f79bca925f0)
        /home/circleci/project/transform/coroutines.go:305 +0x36c
github.com/tinygo-org/tinygo/transform.LowerCoroutines(0x838d8b0, 0x838d801, 0x0, 0x0)
        /home/circleci/project/transform/coroutines.go:70 +0x15f
github.com/tinygo-org/tinygo/transform.Optimize(0x838d8b0, 0xc000267dd0, 0x2, 0x2, 0x5, 0x0, 0x0, 0x0)
        /home/circleci/project/transform/optimizer.go:120 +0xef0
github.com/tinygo-org/tinygo/builder.Build(0x7ffe3611dae1, 0x22, 0x7ffe3611da9a, 0x27, 0xc000267dd0, 0xc003e7bba8, 0x0, 0x0)
        /home/circleci/project/builder/build.go:109 +0x337a
main.Build(0x7ffe3611dae1, 0x22, 0x7ffe3611da9a, 0x27, 0xc0002a8000, 0x0, 0x12)
        /home/circleci/project/main.go:99 +0xc5
main.main()
        /home/circleci/project/main.go:909 +0x2071
make: *** [Makefile:10: build.example] Error 2

This seems something to do with scheduler

[mathetake]

Or maybe unresolvable with the current TinyGo

[mathetake]

With -scheduler=none compiler option, we can compile the above code but get the other error:

Failed to load Wasm module due to a missing import: wasi_unstable.clock_time_get
Failed to load Wasm module due to a missing import: wasi_unstable.poll_oneoff

seems like V8 does not expose these WASI functions

[mathetake]

there's nothing we can do in SDK so I'm closing this