mirror of
https://github.com/rocky-linux/peridot.git
synced 2024-11-01 04:41:22 +00:00
94 lines
2.6 KiB
Go
94 lines
2.6 KiB
Go
/*
|
|
Copyright 2018 The Kubernetes 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 naming
|
|
|
|
import (
|
|
"fmt"
|
|
"regexp"
|
|
goruntime "runtime"
|
|
"runtime/debug"
|
|
"strconv"
|
|
"strings"
|
|
)
|
|
|
|
// GetNameFromCallsite walks back through the call stack until we find a caller from outside of the ignoredPackages
|
|
// it returns back a shortpath/filename:line to aid in identification of this reflector when it starts logging
|
|
func GetNameFromCallsite(ignoredPackages ...string) string {
|
|
name := "????"
|
|
const maxStack = 10
|
|
for i := 1; i < maxStack; i++ {
|
|
_, file, line, ok := goruntime.Caller(i)
|
|
if !ok {
|
|
file, line, ok = extractStackCreator()
|
|
if !ok {
|
|
break
|
|
}
|
|
i += maxStack
|
|
}
|
|
if hasPackage(file, append(ignoredPackages, "/runtime/asm_")) {
|
|
continue
|
|
}
|
|
|
|
file = trimPackagePrefix(file)
|
|
name = fmt.Sprintf("%s:%d", file, line)
|
|
break
|
|
}
|
|
return name
|
|
}
|
|
|
|
// hasPackage returns true if the file is in one of the ignored packages.
|
|
func hasPackage(file string, ignoredPackages []string) bool {
|
|
for _, ignoredPackage := range ignoredPackages {
|
|
if strings.Contains(file, ignoredPackage) {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
// trimPackagePrefix reduces duplicate values off the front of a package name.
|
|
func trimPackagePrefix(file string) string {
|
|
if l := strings.LastIndex(file, "/vendor/"); l >= 0 {
|
|
return file[l+len("/vendor/"):]
|
|
}
|
|
if l := strings.LastIndex(file, "/src/"); l >= 0 {
|
|
return file[l+5:]
|
|
}
|
|
if l := strings.LastIndex(file, "/pkg/"); l >= 0 {
|
|
return file[l+1:]
|
|
}
|
|
return file
|
|
}
|
|
|
|
var stackCreator = regexp.MustCompile(`(?m)^created by (.*)\n\s+(.*):(\d+) \+0x[[:xdigit:]]+$`)
|
|
|
|
// extractStackCreator retrieves the goroutine file and line that launched this stack. Returns false
|
|
// if the creator cannot be located.
|
|
// TODO: Go does not expose this via runtime https://github.com/golang/go/issues/11440
|
|
func extractStackCreator() (string, int, bool) {
|
|
stack := debug.Stack()
|
|
matches := stackCreator.FindStringSubmatch(string(stack))
|
|
if len(matches) != 4 {
|
|
return "", 0, false
|
|
}
|
|
line, err := strconv.Atoi(matches[3])
|
|
if err != nil {
|
|
return "", 0, false
|
|
}
|
|
return matches[2], line, true
|
|
}
|