Closed
Description
env
go version go1.24.0 linux/amd64
tinygo version 0.37.0 linux/amd64 (using go version go1.24.0 and LLVM version 19.1.2)
example code
greet_wasm.go
package main
import (
"fmt"
"runtime"
"time"
)
// main is required for TinyGo to compile to Wasm.
func main() {}
//go:wasmexport greet
func _greet() {
go func() {
fmt.Println(time.Now(), "wasm call host func log")
for i := 0; i < 10; i++ {
runtime.Gosched()
fmt.Println(time.Now(), "sleep", i)
time.Sleep(time.Second)
runtime.Gosched()
}
fmt.Println(time.Now(), "wasm end call host func log")
}()
fmt.Println(time.Now(), "start go sched")
runtime.Gosched()
time.Sleep(time.Second * 3)
fmt.Println(time.Now(), "wasm greet exit")
}
greet.go
package main
import (
"context"
"crypto/rand"
_ "embed"
"fmt"
"log"
"os"
"github.com/tetratelabs/wazero"
"github.com/tetratelabs/wazero/imports/wasi_snapshot_preview1"
)
func main() {
greetWasm, _ := os.ReadFile(os.Args[1])
// Choose the context to use for function calls.
ctx := context.Background()
// Create a new WebAssembly Runtime.
r := wazero.NewRuntime(ctx)
defer r.Close(ctx) // This closes everything this Runtime created.
// Instantiate a Go-defined module named "env" that exports a function to
// log to the console.
_, err := r.NewHostModuleBuilder("env").
Instantiate(ctx)
if err != nil {
log.Panicln(err)
}
wasi_snapshot_preview1.MustInstantiate(ctx, r)
conf := wazero.NewModuleConfig().WithStartFunctions("_initialize").
WithStdout(os.Stdout).
WithStderr(os.Stderr).
WithStdin(os.Stdin).
WithRandSource(rand.Reader).
WithSysNanosleep().
WithSysNanotime().
WithSysWalltime()
mod, err := r.InstantiateWithConfig(ctx, greetWasm, conf)
if err != nil {
log.Panicln(err)
}
greet := mod.ExportedFunction("greet")
_, err = greet.Call(ctx)
if err != nil {
log.Panicln(err)
}
fmt.Println("call exit")
}build wasm
GOOS=wasip1 GOARCH=wasm go build -x -buildmode=c-shared -o greet_go.wasm greet_wasm.go
tinygo build -x -target=wasip1 -buildmode=c-shared -o greet_tinygo.wasm greet_wasm.go
run code
✗ go run ./greet.go greet_go.wasm
2025-04-26 09:26:46.872942035 +0000 UTC m=+0.000078673 start go sched
2025-04-26 09:26:46.873053476 +0000 UTC m=+0.000189942 wasm call host func log
2025-04-26 09:26:46.873128772 +0000 UTC m=+0.000265139 sleep 0
2025-04-26 09:26:47.873372779 +0000 UTC m=+1.000509331 sleep 1
2025-04-26 09:26:48.873640519 +0000 UTC m=+2.000777271 sleep 2
2025-04-26 09:26:49.873695106 +0000 UTC m=+3.000832630 wasm greet exit
call exit
go run ./greet.go greet_tinygo.wasm
2025-04-26 09:26:56.587587118 +0000 UTC m=+1745659616.587587119 start go sched
2025-04-26 09:26:56.587619849 +0000 UTC m=+1745659616.587619850 wasm call host func log
2025-04-26 09:26:56.587631859 +0000 UTC m=+1745659616.587631860 sleep 0
2025-04-26 09:26:57.588717987 +0000 UTC m=+1745659617.588717988 sleep 1
2025-04-26 09:26:58.588576017 +0000 UTC m=+1745659618.588576018 sleep 2
2025-04-26 09:26:59.588550816 +0000 UTC m=+1745659619.588550817 wasm greet exit
2025-04-26 09:26:59.588612372 +0000 UTC m=+1745659619.588612373 sleep 3
2025-04-26 09:27:00.589590637 +0000 UTC m=+1745659620.589590638 sleep 4
2025-04-26 09:27:01.590820044 +0000 UTC m=+1745659621.590820045 sleep 5
2025-04-26 09:27:02.591662457 +0000 UTC m=+1745659622.591662458 sleep 6
2025-04-26 09:27:03.592701553 +0000 UTC m=+1745659623.592701554 sleep 7
2025-04-26 09:27:04.592851337 +0000 UTC m=+1745659624.592851338 sleep 8
2025-04-26 09:27:05.593621511 +0000 UTC m=+1745659625.593621512 sleep 9
2025-04-26 09:27:06.594576024 +0000 UTC m=+1745659626.594576025 wasm end call host func log
call exit
hope
i need wasm exit not block other goroutinue by tinygo build