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// Copyright 2020 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.
// +build go1.12
// +build !go1.17
// Check type signatures when updating Go version.
// Package goid provides the Get function.
package goid
// Get returns the ID of the current goroutine.
func Get() int64 {
return getg().goid
}
// Structs from Go runtime. These may change in the future and require
// updating. These structs are currently the same on both AMD64 and ARM64,
// but may diverge in the future.
type stack struct {
lo uintptr
hi uintptr
}
type gobuf struct {
sp uintptr
pc uintptr
g uintptr
ctxt uintptr
ret uint64
lr uintptr
bp uintptr
}
type g struct {
stack stack
stackguard0 uintptr
stackguard1 uintptr
_panic uintptr
_defer uintptr
m uintptr
sched gobuf
syscallsp uintptr
syscallpc uintptr
stktopsp uintptr
param uintptr
atomicstatus uint32
stackLock uint32
goid int64
// More fields...
//
// We only use goid and the fields before it are only listed to
// calculate the correct offset.
}
// Defined in assembly. This can't use go:linkname since runtime.getg() isn't a
// real function, it's a compiler intrinsic.
func getg() *g
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