mirror of https://github.com/golang/go.git
47 lines
1.3 KiB
Go
47 lines
1.3 KiB
Go
// Copyright 2011 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 openbsd && !386 && openbsd && !amd64 && openbsd && !arm64
|
|
// +build openbsd,!386,openbsd,!amd64,openbsd,!arm64
|
|
|
|
package runtime
|
|
|
|
import (
|
|
"runtime/internal/sys"
|
|
"unsafe"
|
|
)
|
|
|
|
//go:noescape
|
|
func tfork(param *tforkt, psize uintptr, mm *m, gg *g, fn uintptr) int32
|
|
|
|
// May run with m.p==nil, so write barriers are not allowed.
|
|
//go:nowritebarrier
|
|
func newosproc(mp *m) {
|
|
stk := unsafe.Pointer(mp.g0.stack.hi)
|
|
if false {
|
|
print("newosproc stk=", stk, " m=", mp, " g=", mp.g0, " id=", mp.id, " ostk=", &mp, "\n")
|
|
}
|
|
|
|
// Stack pointer must point inside stack area (as marked with MAP_STACK),
|
|
// rather than at the top of it.
|
|
param := tforkt{
|
|
tf_tcb: unsafe.Pointer(&mp.tls[0]),
|
|
tf_tid: nil, // minit will record tid
|
|
tf_stack: uintptr(stk) - sys.PtrSize,
|
|
}
|
|
|
|
var oset sigset
|
|
sigprocmask(_SIG_SETMASK, &sigset_all, &oset)
|
|
ret := tfork(¶m, unsafe.Sizeof(param), mp, mp.g0, funcPC(mstart))
|
|
sigprocmask(_SIG_SETMASK, &oset, nil)
|
|
|
|
if ret < 0 {
|
|
print("runtime: failed to create new OS thread (have ", mcount()-1, " already; errno=", -ret, ")\n")
|
|
if ret == -_EAGAIN {
|
|
println("runtime: may need to increase max user processes (ulimit -p)")
|
|
}
|
|
throw("runtime.newosproc")
|
|
}
|
|
}
|