// structs and arrays passed as arguments to WASI functions.
//
// Note that the use of an integer type prevents the compiler from tracking
// pointers passed to WASI functions, so we must use KeepAlive to explicitly
// retain the objects that could otherwise be reclaimed by the GC.
type uintptr32 = uint32

// https://github.com/WebAssembly/WASI/blob/a2b96e81c0586125cc4dc79a5be0b78d9a059925/legacy/preview1/docs.md#-size-u32

	// cannot access any information about the socket due to limitations
	// with WASI preview 1 networking, and the WASM runtimes do not log the
	// port when you pre-open a socket. So, we probe for a free port here.
	// Given there's an unavoidable race condition, the test is disabled by
	// default.
	if os.Getenv("GOWASIENABLERACYTEST") != "1" {
		t.Skip("skipping WASI test with unavoidable race condition")
	}
	var host string

		;;
	"wasmtime" | "")
		exec wasmtime run --dir=/ --env PWD="$PWD" --env PATH="$PATH" -W max-wasm-stack=1048576 ${GOWASIRUNTIMEARGS:-} "$1" "${@:2}"
		;;
	*)
		echo "Unknown Go WASI runtime specified: $GOWASIRUNTIME"
		exit 1
		;;

		RIGHT_PATH_REMOVE_DIRECTORY |
		RIGHT_PATH_UNLINK_FILE
)

// https://github.com/WebAssembly/WASI/blob/a2b96e81c0586125cc4dc79a5be0b78d9a059925/legacy/preview1/docs.md#-fd_closefd-fd---result-errno
//
//go:wasmimport wasi_snapshot_preview1 fd_close
//go:noescape
func fd_close(fd int32) Errno

		throw("notewakeup - double wakeup")
	}
	n.key = 1
}

func notesleep(n *note) {
	throw("notesleep not supported by wasi")
}

func notetsleep(n *note, ns int64) bool {
	throw("notetsleep not supported by wasi")
	return false
}

// same as runtime·notetsleep, but called on user g (not g0)
func notetsleepg(n *note, ns int64) bool {
	gp := getg()
	if gp == gp.m.g0 {

	family      int
	sotype      int
	isConnected bool // handshake completed or use of association with peer
	net         string
	laddr       Addr
	raddr       Addr

	// The only networking available in WASI preview 1 is the ability to
	// sock_accept on a pre-opened socket, and then fd_read, fd_write,
	// fd_close, and sock_shutdown on the resulting connection. We
	// intercept applicable netFD calls on this instance, and then pass

// not have a mechanism to to spawn processes so there is no reason for an
// application to take a dependency on this type.
type Rusage struct {
	Utime Timeval
	Stime Timeval
}

// ProcAttr is a placeholder to allow compilation of the [os/exec] package
// because we need Go programs to be portable across platforms. WASI does

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build wasip1

package runtime

import "unsafe"

// WASI network poller.
//
// WASI preview 1 includes a poll_oneoff host function that behaves similarly
// to poll(2) on Linux. Like poll(2), poll_oneoff is level triggered. It
// accepts one or more subscriptions to FD read or write events.
//

package poll

import (
	"internal/byteorder"
	"sync/atomic"
	"syscall"
	"unsafe"
)

type SysFile struct {
	// RefCountPtr is a pointer to the reference count of Sysfd.
	//
	// WASI preview 1 lacks a dup(2) system call. When the os and net packages
	// need to share a file/socket, instead of duplicating the underlying file
	// descriptor, we instead provide a way to copy FD instances and manage the

		idx := uint32(lenHostImports) + uint32(ldr.SymValue(s)>>16) - funcValueOffset
		writeName(ctxt.Out, "_start")       // the wasi entrypoint
		ctxt.Out.WriteByte(0x00)            // func export
		writeUleb128(ctxt.Out, uint64(idx)) // funcidx
		writeName(ctxt.Out, "memory")       // memory in wasi
		ctxt.Out.WriteByte(0x02)            // mem export
		writeUleb128(ctxt.Out, 0)           // memidx
	case "js":