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feat: print the current panic stack #5

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feat: print the current panic stack #5

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19 changes: 16 additions & 3 deletions mapreduce.go
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Original file line number Diff line number Diff line change
Expand Up @@ -182,7 +182,11 @@ func mapReduceWithPanicChan[T, U, V any](source <-chan T, panicChan *onceChan, m
defer func() {
drain(collector)
if r := recover(); r != nil {
panicChan.write(r)
buf := make([]byte, 64<<10)
n := runtime.Stack(buf, false)
buf = buf[:n]

panicChan.write(fmt.Sprintf("%v\n%s", r, string(buf)))
}
finish()
}()
Expand Down Expand Up @@ -269,7 +273,11 @@ func buildSource[T any](generate GenerateFunc[T], panicChan *onceChan) chan T {
go func() {
defer func() {
if r := recover(); r != nil {
panicChan.write(r)
buf := make([]byte, 64<<10)
n := runtime.Stack(buf, false)
buf = buf[:n]

panicChan.write(fmt.Sprintf("%v\n%s", r, string(buf)))
}
close(source)
}()
Expand Down Expand Up @@ -316,7 +324,12 @@ func executeMappers[T, U any](mCtx mapperContext[T, U]) {
defer func() {
if r := recover(); r != nil {
atomic.AddInt32(&failed, 1)
mCtx.panicChan.write(r)

buf := make([]byte, 64<<10)
n := runtime.Stack(buf, false)
buf = buf[:n]

mCtx.panicChan.write(fmt.Sprintf("%v\n%s", r, string(buf)))
}
wg.Done()
<-pool
Expand Down