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// 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 && mips64
package runtime
import (
"internal/abi"
"internal/goarch"
"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) - goarch.PtrSize,
}
var oset sigset
sigprocmask(_SIG_SETMASK, &sigset_all, &oset)
ret := retryOnEAGAIN(func() int32 {
errno := tfork(¶m, unsafe.Sizeof(param), mp, mp.g0, abi.FuncPCABI0(mstart))
// tfork returns negative errno
return -errno
})
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")
}
}