prometheus/vendor/github.com/petermattis/goid/goid_go1.5.go

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// Copyright 2016 Peter Mattis.
//
// 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. See the AUTHORS file
// for names of contributors.
// +build amd64 amd64p32 arm
// +build go1.5,!go1.6
package goid
import "unsafe"
// Just enough of the structs from runtime/runtime2.go to get the offset to goid.
// See https://github.com/golang/go/blob/release-branch.go1.5/src/runtime/runtime2.go
type stack struct {
lo uintptr
hi uintptr
}
type gobuf struct {
sp uintptr
pc uintptr
g uintptr
ctxt uintptr
ret uintptr
lr uintptr
bp uintptr
}
type g struct {
stack stack
stackguard0 uintptr
stackguard1 uintptr
_panic uintptr
_defer uintptr
m uintptr
stackAlloc uintptr
sched gobuf
syscallsp uintptr
syscallpc uintptr
stkbar []uintptr
stkbarPos uintptr
param unsafe.Pointer
atomicstatus uint32
stackLock uint32
goid int64 // Here it is!
}
// Backdoor access to runtime·getg().
func getg() uintptr // in goid_go1.5plus.s
func Get() int64 {
gg := (*g)(unsafe.Pointer(getg()))
return gg.goid
}