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#include "callstack.h"
#include <util/thread/singleton.h>
#ifdef USE_ACTOR_CALLSTACK
namespace NActors {
namespace {
void (*PreviousFormatBackTrace)(IOutputStream*) = 0;
ui32 ActorBackTraceEnableCounter = 0;
}
void ActorFormatBackTrace(IOutputStream* out) {
TStringStream str;
PreviousFormatBackTrace(&str);
str << Endl;
TCallstack::DumpCallstack(str);
*out << str.Str();
}
void EnableActorCallstack() {
if (ActorBackTraceEnableCounter == 0) {
Y_VERIFY(PreviousFormatBackTrace == 0);
PreviousFormatBackTrace = SetFormatBackTraceFn(ActorFormatBackTrace);
}
++ActorBackTraceEnableCounter;
}
void DisableActorCallstack() {
--ActorBackTraceEnableCounter;
if (ActorBackTraceEnableCounter == 0) {
Y_VERIFY(PreviousFormatBackTrace);
SetFormatBackTraceFn(PreviousFormatBackTrace);
PreviousFormatBackTrace = 0;
}
}
TCallstack::TCallstack()
: BeginIdx(0)
, Size(0)
, LinesToSkip(0)
{
}
void TCallstack::SetLinesToSkip() {
TTrace record;
LinesToSkip = BackTrace(record.Data, TTrace::CAPACITY);
}
void TCallstack::Trace() {
size_t currentIdx = (BeginIdx + Size) % RECORDS;
if (Size == RECORDS) {
++BeginIdx;
} else {
++Size;
}
TTrace& record = Record[currentIdx];
record.Size = BackTrace(record.Data, TTrace::CAPACITY);
record.LinesToSkip = LinesToSkip;
}
void TCallstack::TraceIfEmpty() {
if (Size == 0) {
LinesToSkip = 0;
Trace();
}
}
TCallstack& TCallstack::GetTlsCallstack() {
return *FastTlsSingleton<TCallstack>();
}
void TCallstack::DumpCallstack(TStringStream& str) {
TCallstack& callstack = GetTlsCallstack();
for (int i = callstack.Size - 1; i >= 0; --i) {
TTrace& record = callstack.Record[(callstack.BeginIdx + i) % RECORDS];
str << Endl << "Trace entry " << i << Endl << Endl;
size_t size = record.Size;
if (size > record.LinesToSkip && size < TTrace::CAPACITY) {
size -= record.LinesToSkip;
}
if (size > RECORDS_TO_SKIP) {
FormatBackTrace(&str, &record.Data[RECORDS_TO_SKIP], size - RECORDS_TO_SKIP);
} else {
FormatBackTrace(&str, record.Data, size);
}
str << Endl;
}
}
}
#endif
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