52 lines
1.0 KiB
Go
52 lines
1.0 KiB
Go
package adverr
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import (
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"runtime"
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"strconv"
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"strings"
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)
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// CallTrace represents a call stack trace similar to Java's stack trace
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type CallTrace struct {
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frames *runtime.Frames
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more bool
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}
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// Trace returns a new CallTrace starting from this call
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// Use skip to skip the first entries in the trace
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func Trace(skip int) *CallTrace {
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if DisableTrace {
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return nil
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}
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pc := make([]uintptr, CallStackLength+1)
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n := runtime.Callers(skip+1, pc)
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pc = pc[:n]
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return &CallTrace{runtime.CallersFrames(pc), n == CallStackLength+1}
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}
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func (ct *CallTrace) String() string {
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if ct == nil {
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return ""
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}
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b := new(strings.Builder)
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for frame, ok := ct.frames.Next(); ok; frame, ok = ct.frames.Next() {
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b.WriteString("\tat ")
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b.WriteString(frame.Function)
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b.WriteString(" (")
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b.WriteString(frame.File)
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b.WriteString(":")
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b.WriteString(strconv.Itoa(frame.Line))
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b.WriteString(")")
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b.WriteString("\n")
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}
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if ct.more {
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b.WriteString("\t ...\n")
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}
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return b.String()
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}
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