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reftracer.go
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/
reftracer.go
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package block
import (
"bytes"
"fmt"
"github.com/icon-project/goloop/common/log"
)
type RefCounter interface {
RefCount() int
}
type RefTracer struct {
Logger log.Logger
refCounters []RefCounter
}
func stringfy(rc RefCounter) string {
if s, ok := rc.(fmt.Stringer); ok {
return s.String()
}
return fmt.Sprintf("%p(%d)", rc, rc.RefCount())
}
func (rt *RefTracer) objectsString() string {
var buf bytes.Buffer
for i, rc := range rt.refCounters {
if i>0 {
buf.WriteString(" ")
}
buf.WriteString(fmt.Sprintf("%s", stringfy(rc)))
}
return buf.String()
}
func (rt *RefTracer) TraceNew(rc RefCounter) {
rt.refCounters = append(rt.refCounters, rc)
rt.Logger.Debugf("new Obj:%s nObjs:%d Objs:%s\n", rc, len(rt.refCounters), rt.objectsString())
// rt.Logger.Debugf("stack:%+v\n", errors.New("stack"))
}
func (rt *RefTracer) TraceRef(rc RefCounter) {
rt.Logger.Debugf("ref Obj:%s\n", stringfy(rc))
}
func (rt *RefTracer) TraceUnref(rc RefCounter) {
if rc.RefCount() != 0 {
rt.Logger.Debugf("unref Obj:%s\n", stringfy(rc))
} else {
rt.traceDispose(rc)
rt.Logger.Debugf("unref Obj:%s nObj:%d Objs:%s\n", stringfy(rc), len(rt.refCounters), rt.objectsString())
}
}
func (rt *RefTracer) traceDispose(rc RefCounter) {
for i, rci := range rt.refCounters {
if rci == rc {
last := len(rt.refCounters) - 1
rt.refCounters[i] = rt.refCounters[last]
rt.refCounters[last] = nil
rt.refCounters = rt.refCounters[:last]
}
}
}
func (rt *RefTracer) TraceDispose(rc RefCounter) {
rt.traceDispose(rc)
rt.Logger.Debugf("dispose Obj:%s nObj:%d Objs:%s\n", stringfy(rc), len(rt.refCounters), rt.objectsString())
}