!230 在openGauss 主备环境上进行 业务并发测试 GTT表产生coredump

Merge pull request !230 from wangzhijun/master

src/gausskernel/storage/ipc/procarray.cpp

@@ -4674,6 +4674,8 @@ TransactionId ListAllSessionGttFrozenxids(int maxSize, ThreadId *pids, Transacti
     }
 
     ThreadPoolSessControl *sessCtrl = g_threadPoolControler->GetSessionCtrl();
+    AutoMutexLock alock(sessCtrl->GetSessionCtrlLock());
+    alock.lock();
     const knl_sess_control *sessList = sessCtrl->GetSessionList();
     const knl_sess_control *currSess = sessList;
     while (currSess != nullptr) {
@@ -4694,6 +4696,7 @@ TransactionId ListAllSessionGttFrozenxids(int maxSize, ThreadId *pids, Transacti
         }
         currSess = currSess->next;
     }
+    alock.unLock();
 
     if (maxSize > 0) {
         *n = i;

src/include/threadpool/threadpool_sessctl.h

@@ -88,9 +88,9 @@ public:
         return m_activelist;
     }
 
-    inline pthread_mutex_t GetSessionCtrlLock()
+    inline pthread_mutex_t* GetSessionCtrlLock()
     {
-        return m_sessCtrlock;
+        return &m_sessCtrlock;
     }
 
 private: