allow disable arcadia backtrace

Проблема: исключения отнаследованные от `TWithBackTrace` едят много CPU, что уже приводило к инцидентам. Кроме того, они не работают в фреймворке uservices.
Решение: разрешить отключать сбор бэктрейсов в рантайме
commit_hash:ad101368d384c90b5b37ac66276ae6611731d579

2 files changed, 18 insertions, 1 deletions

diff --git a/util/system/backtrace.cpp b/util/system/backtrace.cpp
index 97a798e9bb7..482c02b7b84 100644
--- a/util/system/backtrace.cpp
+++ b/util/system/backtrace.cpp
@@ -232,6 +232,16 @@ TResolvedSymbol ResolveSymbol(void* sym, char*, size_t) {
 }
 #endif
 
+TBackTraceFn BackTraceFn = BackTrace;
+
+void SetBackTraceFn(TBackTraceFn f) {
+    BackTraceFn = f;
+}
+
+TBackTraceFn GetBackTraceFn() {
+    return BackTraceFn;
+}
+
 void FormatBackTrace(IOutputStream* out, void* const* backtrace, size_t backtraceSize) {
     char tmpBuf[1024];
 
@@ -270,7 +280,9 @@ TBackTrace::TBackTrace()
 }
 
 void TBackTrace::Capture() {
-    Size = BackTrace(Data, CAPACITY);
+    if (BackTraceFn) {
+        Size = BackTraceFn(Data, CAPACITY);
+    }
 }
 
 void TBackTrace::PrintTo(IOutputStream& out) const {
diff --git a/util/system/backtrace.h b/util/system/backtrace.h
index 2fce7585c3a..4e5ab6a68e1 100644
--- a/util/system/backtrace.h
+++ b/util/system/backtrace.h
@@ -7,6 +7,11 @@ class IOutputStream;
 
 size_t BackTrace(void** p, size_t len);
 
+using TBackTraceFn = size_t (*)(void** p, size_t len);
+
+void SetBackTraceFn(TBackTraceFn f);
+TBackTraceFn GetBackTraceFn();
+
 struct TResolvedSymbol {
     const char* Name;
     void* NearestSymbol;