2c4ae3b0a4
Содержимое пина, зафиксированного в go.mod sing-box-lx, одним коммитом без истории. Полная история SagerNet/gvisor — 1.45 ГБ и клонируется в каждой CI-джобе; наша дельта — одна вставка в одну функцию, история для неё не нужна. Module path github.com/sagernet/gvisor сохранён намеренно: на него опирается replace-директива суперпроекта. Патч поверх — отдельным коммитом, чтобы дельта читалась одним git show и переносилась на новый пин копированием. SPECS/TASKS/048-GVISOR_HANDSHAKE_NIL_CRASH
82 lines
2.3 KiB
Go
82 lines
2.3 KiB
Go
// Copyright 2025 The gVisor Authors.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
// Package gomaxprocs synchronizes adjustments to GOMAXPROCS. When this package
|
|
// is active (i.e. after the first call to SetBase), it sets the value of
|
|
// GOMAXPROCS to a "base" value (which should be set by a single goroutine,
|
|
// without races) plus a non-negative "temporary" value (which may be
|
|
// concurrently increased or decreased by multiple goroutines).
|
|
//
|
|
// Note that changing GOMAXPROCS stops the world, so callers should adjust
|
|
// GOMAXPROCS infrequently.
|
|
//
|
|
// TODO: Add gomaxprocs.Get() and check that other gVisor packages don't call
|
|
// runtime.GOMAXPROCS() at all.
|
|
package gomaxprocs
|
|
|
|
import (
|
|
"runtime"
|
|
|
|
"github.com/sagernet/gvisor/pkg/log"
|
|
)
|
|
|
|
var (
|
|
mu gomaxprocsMutex
|
|
// +checklocks:mu
|
|
base int
|
|
// +checklocks:mu
|
|
temp int
|
|
)
|
|
|
|
// SetBase sets base GOMAXPROCS.
|
|
func SetBase(n int) {
|
|
if n < 1 {
|
|
log.Traceback("Invalid base GOMAXPROCS: %d", n)
|
|
return
|
|
}
|
|
mu.Lock()
|
|
defer mu.Unlock()
|
|
oldBase := base
|
|
base = n
|
|
updateRuntime(oldBase, temp)
|
|
}
|
|
|
|
// Add adds n temporary GOMAXPROCS. n may be negative; callers should call Add
|
|
// with negative n to remove temporary GOMAXPROCS when they are no longer
|
|
// needed.
|
|
func Add(n int) {
|
|
mu.Lock()
|
|
defer mu.Unlock()
|
|
t := temp + n
|
|
if t < 0 {
|
|
log.Traceback("gomaxprocs.Add(%d) would cause temp to become %d", n, t)
|
|
return
|
|
}
|
|
oldTemp := temp
|
|
temp = t
|
|
if base != 0 {
|
|
updateRuntime(base, oldTemp)
|
|
}
|
|
}
|
|
|
|
// +checklocks:mu
|
|
func updateRuntime(oldBase, oldTemp int) {
|
|
n := base + temp
|
|
log.Debugf("Setting GOMAXPROCS to %d", n)
|
|
got := runtime.GOMAXPROCS(n)
|
|
if want := oldBase + oldTemp; oldBase != 0 && got != want {
|
|
// Something changed GOMAXPROCS outside of our control.
|
|
log.Warningf("Previous GOMAXPROCS was %d, expected %d = %d + %d", got, want, oldBase, oldTemp)
|
|
}
|
|
}
|