mirror of https://go.googlesource.com/go
52 lines
1.4 KiB
Go
52 lines
1.4 KiB
Go
// Copyright 2011 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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//go:build openbsd && mips64
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package runtime
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import (
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"internal/abi"
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"internal/goarch"
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"unsafe"
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)
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//go:noescape
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func tfork(param *tforkt, psize uintptr, mm *m, gg *g, fn uintptr) int32
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// May run with m.p==nil, so write barriers are not allowed.
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//
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//go:nowritebarrier
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func newosproc(mp *m) {
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stk := unsafe.Pointer(mp.g0.stack.hi)
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if false {
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print("newosproc stk=", stk, " m=", mp, " g=", mp.g0, " id=", mp.id, " ostk=", &mp, "\n")
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}
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// Stack pointer must point inside stack area (as marked with MAP_STACK),
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// rather than at the top of it.
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param := tforkt{
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tf_tcb: unsafe.Pointer(&mp.tls[0]),
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tf_tid: nil, // minit will record tid
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tf_stack: uintptr(stk) - goarch.PtrSize,
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}
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var oset sigset
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sigprocmask(_SIG_SETMASK, &sigset_all, &oset)
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ret := retryOnEAGAIN(func() int32 {
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errno := tfork(¶m, unsafe.Sizeof(param), mp, mp.g0, abi.FuncPCABI0(mstart))
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// tfork returns negative errno
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return -errno
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})
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sigprocmask(_SIG_SETMASK, &oset, nil)
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if ret != 0 {
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print("runtime: failed to create new OS thread (have ", mcount()-1, " already; errno=", ret, ")\n")
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if ret == _EAGAIN {
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println("runtime: may need to increase max user processes (ulimit -p)")
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}
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throw("runtime.newosproc")
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}
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}
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