linux下調用mysql_query産生SIGSEGV段錯誤



程式需要用到MySQL來進行持久化，代碼在windows測試通過，但在Linux調試時，産生下面的異常：

Thread 9 "NodesManagerd" received signal SIGSEGV, Segmentation fault.      

[Switching to Thread 0x7ffff2b08700 (LWP 9389)]                                                  

0x00007ffff77f1dc0 in ?? () from /usr/lib/x86_64-linux-gnu/libmysqlclient.so.20

通過調試，最後定位到是執行mysql_query産生的問題：

265   assert(_handle != nullptr && sql != nullptr);                                                    

(gdb) n                                                                                                                          

266   if (mysql_query(_handle, sql) != 0)                                                                   

(gdb) n                                                                                                                          

Thread 9 "NodesManagerd" received signal SIGSEGV, Segmentation fault.       

0x00007ffff77f1dc0 in ?? () from /usr/lib/x86_64-linux-gnu/libmysqlclient.so.20 

_handle不為空，sql（SELECT NodeId, LastKeepAlive, Status FROM NodeStatus;）正常。起初不明白為什麼出現這樣的問題，sql沒有問題，問題隻能出現在_handle。檢視_handle初始化方式如下：

_handle = mysql_init(&_mysql);

将初始化方式改為：

_handle = mysql_init(nullptr);

問題解決。但不知為什麼第一種方式在windows上正常運作，在linux卻當掉。