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package xruntime
import (
"runtime"
)
type StackTrace struct {
frames []uintptr
full bool
}
func NewStackTrace16(skip int) *StackTrace {
var pcs [16]uintptr
return newStackTrace(skip+2, pcs[:])
}
func NewStackTrace32(skip int) *StackTrace {
var pcs [32]uintptr
return newStackTrace(skip+2, pcs[:])
}
func NewStackTrace64(skip int) *StackTrace {
var pcs [64]uintptr
return newStackTrace(skip+2, pcs[:])
}
func NewStackTrace128(skip int) *StackTrace {
var pcs [128]uintptr
return newStackTrace(skip+2, pcs[:])
}
func newStackTrace(skip int, pcs []uintptr) *StackTrace {
n := runtime.Callers(skip+1, pcs)
return &StackTrace{frames: pcs[:n], full: true}
}
func NewFrame(skip int) *StackTrace {
var pcs [3]uintptr
n := runtime.Callers(skip+1, pcs[:])
return &StackTrace{frames: pcs[:n]}
}
func (st *StackTrace) Frames() []runtime.Frame {
frames := runtime.CallersFrames(st.frames[:])
if !st.full {
if _, ok := frames.Next(); !ok {
return nil
}
fr, ok := frames.Next()
if !ok {
return nil
}
return []runtime.Frame{fr}
}
var res []runtime.Frame
for {
frame, more := frames.Next()
if !more {
break
}
res = append(res, frame)
}
return res
}
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