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defaults_stacks.go
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/
defaults_stacks.go
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// Copyright 2023 xgfone
//
// 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 defaults
import (
"fmt"
"runtime"
"strings"
)
var (
// TrimPkgFileFunc is used to trim the prefix of the package file path.
TrimPkgFileFunc = NewValueWithValidation(trimPkgFile, fA1R1Validation[string, string]("TrimPkgFile"))
// GetStacksFunc is used to get the stacks of the function calling.
GetStacksFunc = NewValueWithValidation(getStacks, fA1R1Validation[int, []string]("GetStacks"))
)
// GetStacks is the proxy of GetStacksFunc to call the funciton.
func GetStacks(skip int) []string {
return GetStacksFunc.Get()(skip + 3)
}
func getStacks(skip int) []string {
var pcs [64]uintptr
n := runtime.Callers(skip, pcs[:])
if n == 0 {
return nil
}
stacks := make([]string, 0, n)
frames := runtime.CallersFrames(pcs[:n])
for {
frame, more := frames.Next()
if !more {
break
}
stacks = append(stacks, fmtframe(frame))
}
return stacks
}
// TrimPkgFile is the proxy of TrimPkgFileFunc to call the funciton.
func TrimPkgFile(file string) string {
return TrimPkgFileFunc.Get()(file)
}
var trimPrefixes = []string{"/pkg/mod/", "/src/"}
func trimPkgFile(file string) string {
for _, mark := range trimPrefixes {
if index := strings.Index(file, mark); index > -1 {
file = file[index+len(mark):]
break
}
}
return file
}
func caller(skip int) (caller string) {
pcs := make([]uintptr, 1)
if n := runtime.Callers(skip+2, pcs); n > 0 {
frame, _ := runtime.CallersFrames(pcs).Next()
if frame.PC != 0 {
return fmtframe(frame)
}
}
return "???"
}
func fmtframe(frame runtime.Frame) string {
frame.File = TrimPkgFile(frame.File)
if frame.Function == "" {
return fmt.Sprintf("%s:%d", frame.File, frame.Line)
}
name := frame.Function
if index := strings.LastIndexByte(frame.Function, '.'); index > -1 {
name = frame.Function[index+1:]
}
return fmt.Sprintf("%s:%s:%d", frame.File, name, frame.Line)
}