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// Copyright 2018 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.
//go:build js && wasm
package runtime
import (
"unsafe"
)
func exit(code int32)
func write1(fd uintptr, p unsafe.Pointer, n int32) int32 {
if fd > 2 {
throw("runtime.write to fd > 2 is unsupported")
}
wasmWrite(fd, p, n)
return n
}
// Stubs so tests can link correctly. These should never be called.
func open(name *byte, mode, perm int32) int32 { panic("not implemented") }
func closefd(fd int32) int32 { panic("not implemented") }
func read(fd int32, p unsafe.Pointer, n int32) int32 { panic("not implemented") }
//go:noescape
func wasmWrite(fd uintptr, p unsafe.Pointer, n int32)
func usleep(usec uint32)
//go:nosplit
func usleep_no_g(usec uint32) {
usleep(usec)
}
func exitThread(wait *uint32)
type mOS struct{}
func osyield()
//go:nosplit
func osyield_no_g() {
osyield()
}
const _SIGSEGV = 0xb
func sigpanic() {
g := getg()
if !canpanic(g) {
throw("unexpected signal during runtime execution")
}
// js only invokes the exception handler for memory faults.
g.sig = _SIGSEGV
panicmem()
}
type sigset struct{}
// Called to initialize a new m (including the bootstrap m).
// Called on the parent thread (main thread in case of bootstrap), can allocate memory.
func mpreinit(mp *m) {
mp.gsignal = malg(32 * 1024)
mp.gsignal.m = mp
}
//go:nosplit
func sigsave(p *sigset) {
}
//go:nosplit
func msigrestore(sigmask sigset) {
}
//go:nosplit
//go:nowritebarrierrec
func clearSignalHandlers() {
}
//go:nosplit
func sigblock(exiting bool) {
}
// Called to initialize a new m (including the bootstrap m).
// Called on the new thread, cannot allocate memory.
func minit() {
}
// Called from dropm to undo the effect of an minit.
func unminit() {
}
// Called from exitm, but not from drop, to undo the effect of thread-owned
// resources in minit, semacreate, or elsewhere. Do not take locks after calling this.
func mdestroy(mp *m) {
}
func osinit() {
ncpu = 1
getg().m.procid = 2
physPageSize = 64 * 1024
}
// wasm has no signals
const _NSIG = 0
func signame(sig uint32) string {
return ""
}
func crash() {
*(*int32)(nil) = 0
}
func getRandomData(r []byte)
func goenvs() {
goenvs_unix()
}
func initsig(preinit bool) {
}
// May run with m.p==nil, so write barriers are not allowed.
//go:nowritebarrier
func newosproc(mp *m) {
panic("newosproc: not implemented")
}
func setProcessCPUProfiler(hz int32) {}
func setThreadCPUProfiler(hz int32) {}
func sigdisable(uint32) {}
func sigenable(uint32) {}
func sigignore(uint32) {}
//go:linkname os_sigpipe os.sigpipe
func os_sigpipe() {
throw("too many writes on closed pipe")
}
//go:nosplit
func cputicks() int64 {
// Currently cputicks() is used in blocking profiler and to seed runtime·fastrand().
// runtime·nanotime() is a poor approximation of CPU ticks that is enough for the profiler.
return nanotime()
}
//go:linkname syscall_now syscall.now
func syscall_now() (sec int64, nsec int32) {
sec, nsec, _ = time_now()
return
}
// gsignalStack is unused on js.
type gsignalStack struct{}
const preemptMSupported = false
func preemptM(mp *m) {
// No threads, so nothing to do.
}
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