mirror of https://github.com/docker/cli.git
66 lines
1.2 KiB
Go
66 lines
1.2 KiB
Go
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package errors
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import (
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"encoding/json"
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"fmt"
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"runtime"
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)
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// Call holds a call frame
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type Call runtime.Frame
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// Location is the parsed file, line, and other info we can determine from
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// a specific gostack.Call.
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type Location struct {
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File string
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Line int
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Func string
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}
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// Location uses the gostack package to construct file, line, and other
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// info about this call.
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func (c Call) Location() *Location {
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return &Location{
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File: c.File,
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Line: c.Line,
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Func: c.Function,
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}
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}
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// MarshalJSON returns the JSON representation.
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func (c Call) MarshalJSON() ([]byte, error) {
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m := make(map[string]interface{})
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loc := c.Location()
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m["file"] = loc.File
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m["line"] = loc.Line
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m["func"] = loc.Func
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return json.Marshal(m)
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}
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func (c Call) String() string {
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return fmt.Sprintf("%v:%v", c.File, c.Line)
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}
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// CallStack is a convenience alias for a call stack.
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type CallStack []Call
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// CurrentCallStack returns the call stack, skipping the specified
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// depth of calls.
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func CurrentCallStack(skip int) CallStack {
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var pcs [128]uintptr
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n := runtime.Callers(skip+2, pcs[:])
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callersFrames := runtime.CallersFrames(pcs[:n])
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cs := make([]Call, 0, n)
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for {
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frame, more := callersFrames.Next()
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cs = append(cs, Call(frame))
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if !more {
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break
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}
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}
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return cs
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}
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