87 lines
1.7 KiB
Go
87 lines
1.7 KiB
Go
/*
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* Copyright 2025 coze-dev Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package internal
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import (
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"errors"
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"fmt"
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"runtime"
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"strings"
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)
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type StackTracer interface {
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StackTrace() string
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}
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type withStack struct {
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cause error
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stack string
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}
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func (w *withStack) Unwrap() error {
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return w.cause
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}
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func (w *withStack) StackTrace() string {
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return w.stack
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}
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func (w *withStack) Error() string {
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return fmt.Sprintf("%s\nstack=%s", w.cause.Error(), w.stack)
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}
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func stack() string {
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const depth = 32
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var pcs [depth]uintptr
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n := runtime.Callers(2, pcs[:])
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b := strings.Builder{}
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for i := 0; i < n; i++ {
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fn := runtime.FuncForPC(pcs[i])
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file, line := fn.FileLine(pcs[i])
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name := trimPathPrefix(fn.Name())
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b.WriteString(fmt.Sprintf("%s:%d %s\n", file, line, name))
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}
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return b.String()
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}
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func trimPathPrefix(s string) string {
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i := strings.LastIndex(s, "/")
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s = s[i+1:]
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i = strings.Index(s, ".")
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return s[i+1:]
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}
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func withStackTraceIfNotExists(err error) error {
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if err == nil {
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return nil
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}
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// skip if stack has already exist
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var stackTracer StackTracer
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if errors.As(err, &stackTracer) {
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return err
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}
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return &withStack{
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err,
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stack(),
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}
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}
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