package deadlock
import (
"fmt"
"io"
"runtime"
"strings"
"sync/atomic"
)
func callers(skip int) (retv []uintptr) {
tmp := make([]uintptr, 50)
if n := runtime.Callers(2+skip, tmp); n > 0 {
retv = make([]uintptr, n)
copy(retv, tmp[:n])
}
return
}
func printStack(w io.Writer, stack []uintptr) {
frames := runtime.CallersFrames(stack)
var frame runtime.Frame
more := true
for more {
frame, more = frames.Next()
if strings.HasPrefix(frame.Function, "runtime.goexit") ||
strings.HasPrefix(frame.Function, "testing.tRunner") {
break
}
fmt.Fprintf(w, " %s()\n", frame.Function)
fmt.Fprintf(w, " %s:%d +0x%x\n", frame.File, frame.Line, frame.PC-frame.Entry)
}
fmt.Fprintln(w)
}
var stackBufSize = int64(1024)
// Stacktraces for all goroutines.
func stacks() []byte {
for {
bufSize := atomic.LoadInt64(&stackBufSize)
buf := make([]byte, bufSize)
if n := runtime.Stack(buf, true); n < len(buf) {
return buf[:n]
}
atomic.StoreInt64(&stackBufSize, bufSize*2)
}
}
