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package xerrors
import (
"errors"
"fmt"
"io"
"github.com/ydb-platform/ydb/library/go/x/xruntime"
)
func writeStackTrace(w io.Writer, stacktrace *xruntime.StackTrace) {
for _, frame := range stacktrace.Frames() {
if frame.Function != "" {
_, _ = fmt.Fprintf(w, " %s\n ", frame.Function)
}
if frame.File != "" {
_, _ = fmt.Fprintf(w, " %s:%d\n", frame.File, frame.Line)
}
}
}
type ErrorStackTrace interface {
StackTrace() *xruntime.StackTrace
}
// StackTraceOfEffect returns last stacktrace that was added to error chain (furthest from the root error).
// Guarantees that returned value has valid StackTrace object (but not that there are any frames).
func StackTraceOfEffect(err error) ErrorStackTrace {
var st ErrorStackTrace
for {
if !As(err, &st) {
return nil
}
if st.StackTrace() != nil {
return st
}
err = st.(error)
err = errors.Unwrap(err)
}
}
// StackTraceOfCause returns first stacktrace that was added to error chain (closest to the root error).
// Guarantees that returned value has valid StackTrace object (but not that there are any frames).
func StackTraceOfCause(err error) ErrorStackTrace {
var res ErrorStackTrace
var st ErrorStackTrace
for {
if !As(err, &st) {
return res
}
if st.StackTrace() != nil {
res = st
}
err = st.(error)
err = errors.Unwrap(err)
}
}
// NextStackTracer returns next error with stack trace.
// Guarantees that returned value has valid StackTrace object (but not that there are any frames).
func NextStackTrace(st ErrorStackTrace) ErrorStackTrace {
var res ErrorStackTrace
for {
err := st.(error)
err = errors.Unwrap(err)
if !As(err, &res) {
return nil
}
if res.StackTrace() != nil {
return res
}
}
}
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