time: add wasip1 support

Fixes #58141

Co-authored-by: Richard Musiol <neelance@gmail.com>
Co-authored-by: Achille Roussel <achille.roussel@gmail.com>
Co-authored-by: Julien Fabre <ju.pryz@gmail.com>
Co-authored-by: Evan Phoenix <evan@phx.io>
Change-Id: I51dabbf17b8f5540c964f90223d18457f6f9fbef
Reviewed-on: https://go-review.googlesource.com/c/go/+/483236
Run-TryBot: Johan Brandhorst-Satzkorn <johan.brandhorst@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
Auto-Submit: Johan Brandhorst-Satzkorn <johan.brandhorst@gmail.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>

src/time/sys_unix.go

@@ -2,18 +2,26 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build unix || (js && wasm)
+//go:build unix || (js && wasm) || wasip1
 
 package time
 
 import (
 	"errors"
+	"runtime"
 	"syscall"
 )
 
 // for testing: whatever interrupts a sleep
 func interrupt() {
-	syscall.Kill(syscall.Getpid(), syscall.SIGCHLD)
+	// There is no mechanism in wasi to interrupt the call to poll_oneoff
+	// used to implement runtime.usleep so this function does nothing, which
+	// somewhat defeats the purpose of TestSleep but we are still better off
+	// validating that time elapses when the process calls time.Sleep than
+	// skipping the test altogether.
+	if runtime.GOOS != "wasip1" {
+		syscall.Kill(syscall.Getpid(), syscall.SIGCHLD)
+	}
 }
 
 func open(name string) (uintptr, error) {

src/time/zoneinfo_wasip1.go

@@ -0,0 +1,12 @@
+// Copyright 2023 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package time
+
+// in wasip1 zoneinfo is managed by the runtime.
+var platformZoneSources = []string{}
+
+func initLocal() {
+	localLoc.name = "Local"
+}