From c2ce0fb46f3143589792b7511f52382f5a755823 Mon Sep 17 00:00:00 2001
From: hongweipeng <hongweichen8888@sina.com>
Date: Tue, 7 May 2024 15:21:22 +0800
Subject: [PATCH] Fix memory leak in TlsRandomNumberGenerator() constructor
 #2660

---
 sdk/src/common/random.cc | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sdk/src/common/random.cc b/sdk/src/common/random.cc
index 77b88cfa2a..a3393331bf 100644
--- a/sdk/src/common/random.cc
+++ b/sdk/src/common/random.cc
@@ -6,6 +6,7 @@
 #include "src/common/platform/fork.h"
 
 #include <cstring>
+#include <mutex>
 #include <random>
 
 OPENTELEMETRY_BEGIN_NAMESPACE
@@ -20,13 +21,14 @@ namespace common
 //     https://github.com/opentracing-contrib/nginx-opentracing/issues/52
 namespace
 {
+static std::once_flag once;
 class TlsRandomNumberGenerator
 {
 public:
   TlsRandomNumberGenerator() noexcept
   {
     Seed();
-    platform::AtFork(nullptr, nullptr, OnFork);
+    std::call_once(once, [](){ platform::AtFork(nullptr, nullptr, OnFork); });
   }
 
   static FastRandomNumberGenerator &engine() noexcept { return engine_; }